WO2011073426A1

WO2011073426A1 - Accumulator

Info

Publication number: WO2011073426A1
Application number: PCT/EP2010/070153
Authority: WO
Inventors: Gert Krammer
Original assignee: Magna E-Car Systems Gmbh & Co Og
Priority date: 2009-12-18
Filing date: 2010-12-17
Publication date: 2011-06-23

Abstract

The invention relates to an accumulator (210) comprising a base element (211) lying in a stack, a covering element (217), at least one cooling/heating element (212, 214, 216) between the base element (211) and the covering element (217), and at least one first and one second cell that adjoin the cooling/heating element in the interior of the stack.

Description

accumulator

TECHNICAL AREA

The invention relates to an accumulator, in particular an accumulator for a

Electric power vehicle.

STATE OF THE ART

Today, more and more electrical and electronic devices are used, which can be operated independently of a power grid. More and more powerful devices and the desire for the longest possible operating time require more and more powerful accumulators. As a rule, these should be as small and light as possible, yet have high energy content. In order to meet these contradictory demands, which are particularly important in the construction of electric power tools, great efforts have recently been made. Nevertheless, there is still room for improvement in the field of accumulator technology.

DISCLOSURE OF THE INVENTION

The object of the present invention is therefore to specify an improved accumulator, in particular an accumulator for an electric motor vehicle.

The object of the invention is achieved by an accumulator according to claim 1, namely by an accumulator, comprising a arranged in a stack

Basic element, a cover element and at least one cooling / heating element between the base member and the lid member and at least a first and a second cell, which adjoin the cooling / - heating element inside the stack.

A typical battery assembly usually requires multiple series connected cells to obtain a desired output voltage. Often, 100 and more cells are needed. For example, in the prior art, 12 cells may become one module

be assembled and then 8 modules strung together to obtain a desired voltage. For the realization of different capacities and / or Voltages of a rechargeable battery are now proposed according to the invention to provide a stack of cells (eg 50 to 70 cells) with intervening cooling / heating elements. The production of an accumulator is thus particularly flexible, since one does not rely on modules with 12 cells and their multiples, but can also add or omit individual cells. Of course, an electronic circuit provided for monitoring the cells can also monitor smaller groups from the 50 to 70 cells

However, circuits are preferably combined in an electronic module.

Advantageous embodiments and modifications of the invention will become apparent from the dependent claims and from the description in conjunction with the figures of the drawing.

It is advantageous in a fiction, contemporary accumulator, if at least one of the arranged in the stack cooling / heating elements has a height in the stacking direction, which is less than its length and width transverse to the stacking direction, preferably all arranged in the stack cooling / heating elements. The elements are therefore flat in the direction of stacking and are preferably parallel to each other, whereby a dense, space-saving arrangement of the elements of the stack is made possible.

Preferably, therefore, in an accumulator having at least two cooling / heating elements, a first boundary of a cooling / heating element, which is provided for body contact to a first cell of the accumulator, parallel to a second boundary of a second cooling / heating element, which for body contact a second cell of the

Accumulator is provided, sufficient. Preferably, all boundaries of all cooling / heating elements, which are provided for body contact to a cell of the accumulator, aligned parallel to each other.

It is advantageous in a fiction, modern accumulator that at least one of the cells arranged in the stack is designed as a flat cell, preferably all cells arranged in the stack are formed as flat cells. In particular, in cooperation with the likewise flat cooling / heating elements, this results in a particularly dense, space-saving arrangement of the elements of the stack.

Both the cooling / heating elements and the cells can be shaped differently in plan view of the stack, for example, round, three, four or hexagonal. Preferred are but both the cooling / heating elements and the cells are square. This results in a good use of space when installed in a usually rectangular in plan space. For this purpose, the cells preferably also extend in plan view over approximately the same area as the cooling / heating elements. It is advantageous in a fiction, contemporary accumulator when the medium is in the cooling / heating element under pressure. The cells of the accumulator do not necessarily have a rigid outer housing but are partially embedded only in relatively soft plastic sheaths. For this reason, the cells usually require an external pressure, typically up to 2 bar, for proper function.

It is advantageous in a fiction, contemporary accumulator when between a

Limiting a cooling / heating element and a cell, a fire retardant material is arranged, in particular a refractory tile, a refractory fabric or refractory paper. In the event of a defect or improper use of the accumulator, individual cells may "burn off" due to the large size of the cell

Heat also ignite the neighboring cells and can cause a destruction of the entire accumulator. To counteract this chain reaction, a fire-retardant layer is advantageously arranged between a cell and a cooling / heating element such that the fire-retardant material forms a large proportion of the

Temperature gradient degrades to the surface of the cooling element. This can prevent thermal damage to a cooling / heating element adjacent to a cell affected by the thermal runaway.

It is advantageous in a fiction, modern accumulator, when the surface of the base member and / or lid member is curved outward, in particular with a central indentation. In this way, forces that are applied, for example, by a wound around the accumulator strap, are particularly well introduced into the accumulator. The indentation can advantageously serve to accommodate a turnbuckle.

It is advantageous in a fiction, contemporary accumulator when in the stack

Control element is arranged with an electronic control module, which is provided for controlling switching and / or measuring operations in the accumulator. modern

Accumulators often include electronic circuits that serve to monitor and control the same. According to the invention, these control modules in one or integrated several control elements, which can be arranged for example within a stack of cooling / heating elements. The construction of a rechargeable battery is therefore particularly simple.

It is advantageous in a fiction, modern accumulator, when the control is adjacent to a cooling / heating element. In this way, the control or the control module contained therein can be cooled, which is particularly advantageous if the control module includes elements of the power electronics, sometimes very high

Switch services. This control module can, for example, be a charger for the

Include accumulator.

It is also advantageous in a fiction, modern accumulator when a battery disconnect unit or Battery Disconnect Unit and / or an accumulator management unit or Battery Management Unit is provided as a control. In this way, the two units frequently used in a rechargeable battery can easily be integrated into the rechargeable battery or also be cooled.

It is advantageous in a fiction, modern accumulator, when the electric

Connections of the individual elements of the accumulator lie substantially in one plane. In this way, the wiring of the accumulator or the review of the same - for example, when the accumulator is defective - particularly simple.

It is advantageous in a fiction, modern accumulator, if all temperature and / or voltage sensors for monitoring the cells and / or circuit parts for the balancing of the cells are arranged on a circuit board. The structure of the circuit for checking the cells of the accumulator is thus particularly simple.

It is advantageous in a fiction, contemporary accumulator when temperature and / or voltage sensors for monitoring the cells and / or circuit parts for balancing the cells are arranged on different boards and between the boards a potential-free communication connection is provided. Here, individual boards are used to monitor a cell or group of cells, which accommodates the modular design of the battery. There is one between the boards

Voltage potential-bridging communication link, so that the sometimes high potential differences within a cell stack not to affect or even Destruction of components on the individual boards can lead. Communication can be serial from board to board but also from any board to any other board. Also conceivable is a star-shaped communication to a central control unit. Of course, hybrids are also conceivable.

It is advantageous in a fiction, contemporary accumulator, when as

potential-free communication connection an optical data connection or a

Radio connection is provided. In this way, a voltage potential between the individual boards can be bridged particularly well. This technique can also be used independently of other features mentioned in the application, thus for each type of accumulator.

It is also advantageous in a fiction, modern accumulator when the electrical connections of the individual elements of the accumulator are connected to a cell monitoring unit or a Cell Supervisory Cuircuit. In this way, this often used in a battery unit can be easily integrated into the accumulator.

It is advantageous in a fiction, contemporary accumulator when a strap is arranged around the stack. Since the stack is relatively unstable without further action and usually within the accumulator no pressure can be built up is

Invention according to a strap placed around the accumulator, which holds them together and also absorbs the internal pressure forces. Of course, several clamping bands can be placed around the accumulator. Tightening straps to cells of a

Keeping accumulator together are known per se. For example, the

JP 2003323874A an arrangement in which a plurality of cells are held together by a strained band. In contrast to the present invention, JP 2003323874A, however, varies the length of the stack and thus the length of the strip. In the present invention, however, the length of the outer band remains the same. Therefore, bands of materials with comparatively high modulus of elasticity can be used. Preferably, these bands are in terms of their thermal

Expansion coefficients adapted to the thermal expansion properties of the stack. It is advantageous in a fiction, contemporary accumulator when the clamping band consists of one of the materials: rubber, metal, plastic, fiber reinforced plastic.

For example, rubber offers the advantage that the band can be placed around the accumulator without further measures and builds up a force there. In contrast, metals are not so elastic and are advantageously tensioned and fixed with a device. But they can withstand much higher forces than rubber. Plastics offer a good middle ground.

It is advantageous in a fiction, contemporary accumulator when the strap has a turnbuckle. In this way, the bands can be well tensioned, especially those made of relatively high modulus materials.

It is advantageous in a fiction, contemporary accumulator when retaining tabs are provided, which are clamped between a clamping band and a base member or cover member. In order to be able to fix the accumulator in a vehicle or a device to be supplied with energy, holding tabs between clamping band and a basic element or cover element are advantageously clamped in this variant. In this way, the tabs can be particularly easily arranged at different positions or different retaining tabs for otherwise identical accumulators can be used. The accumulator can thus be particularly good at different

Installation situations are adjusted.

It is advantageous in a fiction, contemporary accumulator, if over the stack vertically extending tension elements, in particular threaded rods, are provided, which are intended for the cohesion of the stack. Threaded rods which are arranged vertically (that is to say transversely to the parting plane of the individual modules) are likewise very well suited for stabilizing the stack or for internal pressures of the accumulator

take. By simply cutting to length, they can also be easily adapted to different levels of stacking. At the bottom and at the top of the stack is then clamped together with a nut.

It is advantageous in a fiction, contemporary accumulator when a horizontally extending over the stack bridge is provided, in particular of flat material, a U-profile or a tubular profile having elements for receiving the tension elements at the ends, in particular holes for receiving a threaded rod. If the accumulator has no holes for receiving a threaded rod or even better Force distribution can be a bridge horizontally (that is, in the direction of the separation plane of the individual modules) are provided over the stack. An upper and a lower bridge are then in turn stretched by means of threaded rods and nuts against each other and thus hold the stack together securely.

It is advantageous in a fiction, contemporary accumulator when retaining tabs are provided, which are clamped between a bridge and a base member or cover member. Also in this variant retaining tabs can be used. In this way, the tabs in turn can be easily arranged at different positions or different retaining tabs for otherwise identical accumulators can be used. The accumulator can thus be particularly good at different

Installation situations are adjusted.

The invention is further achieved by a cooling / heating element, namely by a cooling / heating element for a rechargeable battery, comprising a cooling surface with a first

A limiter provided for body contact with a first cell of the accumulator and a second limiter provided for body contact with a second cell of the accumulator, the two limbs being elastically connected together.

The cells of a rechargeable battery generate waste heat during operation, which is usually absorbed by the large thermal mass of the cells themselves. An active cooling is therefore usually only required at very high outside temperatures or at a very long

Operating time of a rechargeable battery or when "power cells" are used, for example in a hybrid vehicle, which are charged or discharged several times within a few minutes (the thermal mass then no longer suffices very quickly.) On the other hand, heating is advantageous even at moderately low temperatures. because the chemical

Reactivity of most cell types comes to a halt.

In addition, the volume of a cell varies depending on the state of charge. According to the invention, the cooling / heating element can heat or cool the cells as needed as well

Balance the volume fluctuations of the cells and exert pressure forces on the cells. Among other things, these pressure forces serve to fix the cells, which are usually located in a plastic bag. Overall, the individual cooling / heating elements in the stack form a very stable accumulator housing. In addition, the cooling / heating elements can of course be used in addition to the use of the cells for the temperature control of other components in the accumulator, for example for the heating / cooling of electronic assemblies.

Finally, the cooling / heating elements form, as it were, "fire walls" between the individual cells, which can lead to a so-called "thermal runaway" in the event of overheating, overcharging or other improper use. In this case, the entire stored in a cell chemical and electrical energy is implemented within 5 to 25 seconds. This creates locally very high temperatures of over 700 ° C, which can ignite the adjacent cells because of the high packing density of the cells. The cooling / heating elements prevent heat and fire from spreading to neighboring cells that have not yet been affected by the thermal runaway.

It is advantageous in a fiction, contemporary cooling / heating element, if in the interior of the cooling / heating element in the region of the cooling surface elastic webs are provided for connecting the first and second boundary. This way can be both a good one

Cohesion of the cooling / heating element as well as a possibility for volume change of the cooling / heating element can be achieved.

It is advantageous in a fiction, contemporary cooling / heating element when the webs are configured meandering. Due to the meander shape, the webs can be easily deformed, so that the resistance to a change in volume is only slight. In addition, the meandering shape ensures that a certain minimum distance between the boundaries is maintained when compressing the cooling / heating element, as excessive

Compression the legs of a Mäanderbogens come to rest on each other and can not or only with considerable effort further pressed together.

It is advantageous in a fiction, contemporary cooling / heating element, when the webs extend obliquely from the first boundary to the second boundary. Again, the resistance to a volume change is low. Similarly, with excessive compression of the cooling / heating element also a minimum distance between its limits is maintained, which in this case corresponds approximately to the thickness of the web.

It is advantageous in a fiction, contemporary cooling / heating element when spacer knobs are provided in the region of the cooling surface, in particular without the first boundary surface with the second to connect. In this way, a minimum distance between the boundaries of the cooling / heating element can also be maintained, in particular if it is dispensed with elastic webs simpler manufacturability. The nubs can be arranged on one side or two sides.

It is advantageous in a fiction, contemporary cooling / heating element when a rigid edge is provided, which is elastically connected to the boundaries of the cooling / heating element. The rigid edge allows good stackability of the cooling / heating elements. Furthermore, it can accommodate inlet and outlet channels for the cooling medium. Finally, the rigid edge ensures the safe positioning of the cells during assembly of the accumulator. Once the accumulator has been completed, the cooling / heating elements in a composite form a housing for all cells and fix each cell separately.

It is advantageous in a fiction, contemporary cooling / heating element when the rigid edge is at least as high as a cell, the thickness of the boundaries and a minimum distance between the boundaries. In this case, the rigid edge also ensures that a certain minimum distance between the individual cooling / heating elements is maintained. In this way it can be ensured that the individual cooling / heating elements of a stack are compressed or expanded more or less the same. Strong local

Differences in the cooling / heating power can thus be avoided.

It is advantageous in a fiction, contemporary cooling / heating element, if a

Flow aperture is provided on the edge of the cooling surface, which ensures a substantially constant inflow or outflow of a cooling / heating medium, regardless of the distance between the first and second boundary. A constant inflow and / or outflow also contributes to the cooling / heating power within the accumulator not varying too much.

It is advantageous in a fiction, contemporary cooling / heating element, if a

Flow aperture is provided at the edge of the cooling surface, which throttles an inlet of a cooling / heating medium with increasing distance between the first and second boundary. In this variant, the inlet with increasing distance between the first and second

Restricted limitation and increased with decreasing distance. In this way, the pressure in the cooling surface is controlled so that decreasing pressure counteracts a further increase in the distance between the boundaries and vice versa. It is advantageous in a fiction, contemporary cooling / heating element when a flow restrictor is provided at the edge of the cooling surface, which throttles a flow of a cooling / heating medium with decreasing distance between the first and second boundary. In this variant, the process with increasing distance between the first and second

Limitation increased and throttled with decreasing distance. In this way, the pressure in the cooling surface is controlled so that decreasing pressure counteracts a further increase in the distance between the boundaries and vice versa. Of course, this variant is also with the above-mentioned variant of a regulated feed

combined.

Advantageously, an inventive cooling / heating element, if it is stackable. In this way, an accumulator can be built particularly simple.

It is advantageous in a fiction, contemporary cooling / heating element when it has a toothing at its intended for stacking interfaces. The gearing helps

Shear forces within the stack, i. transverse to the stack or to its edge, to transfer and thus stabilize it. If the toothing is asymmetrical, this can also prevent the cooling / heating elements are stacked upside down or twisted.

It is advantageous in a fiction, contemporary cooling / heating element when an inlet or outlet is provided, which cooperates in a stack with an inlet or outlet of an adjacent cooling / heating element. In this way, the inflows and outflows of the individual elements form an inlet and outlet, which can extend over the entire stack, without the need for a separate piping would be necessary. The assembly of the accumulator is thus particularly simple, especially when a seal is molded directly on the cooling / heating element. The seal can also be designed as a separate part. In both cases, both seals of the same material are possible from which also the cooling / heating element consists, as well as seals made of a different material.

It is also advantageous in a fiction, contemporary cooling / heating element, if this includes at least one cooled with a cooling medium channel for removing hot fuel gases from a cell. Overheating, overcharging or other improper use may lead to a "thermal runaway" as already mentioned To prevent other cells is advantageously provided with a cooling medium cooled channel for the removal of hot fuel gases. In order to improve the heat dissipation, several channels can be provided.

The object of the invention is further achieved with a volume compensation arrangement, namely by a volume compensation arrangement for a cooling / heating medium

(or for the combination of cooling / heating elements) of a rechargeable battery, comprising a flexible housing, on which biased plate springs act or by a volume compensation arrangement for a cooling / heating medium of a rechargeable battery, comprising a rigid housing, in which a flexible housing is arranged, on which prestressed elastic elements, in particular disc springs act.

As already mentioned, the volume of the cells of accumulators varies according to state of charge and temperature. This is usually accompanied by a change in volume of the cells adjacent to the cooling / heating elements. A fiction, contemporary

Volume compensation arrangement now allows the volume changes mentioned, since usually serves as a cooling medium, a liquid which is not compressible such as gases. As elastic elements, of course, all types of springs, especially coil springs, as well as, for example, elastic plastic foams into consideration.

It is advantageous in a volume compensation arrangement when the elastic elements, in particular disc springs, are operated in a region in which the force in the

Essentially independent of the travel is. In this way, a substantially constant pressure in the accumulator can be achieved independently of the extent of the cells.

Furthermore, the invention is achieved by a cooling medium, namely a cooling medium for a cooling / heating element, an antifreeze and / or a surfactant and / or a

Corrosion inhibitor is added.

In particular, by adding surfactants, the cooling medium gets a dirt and air bubbles releasing effect. As a result, dirt and air bubbles are dissolved in the cooling medium and removed from the capillaries of the cooling / heating elements. This air bubbles and dirt dissolving effect further allows the inflow and outflow in one lying built-in accumulator can also be arranged on the bottom. The air bubbles can then not accumulate or settle in the higher areas of the cooling elements - these are washed out at a sufficient flow rate. The cooling effect thus remains uniform over the entire cooling surface.

In addition, the invention is achieved by a cell for a rechargeable battery, namely a cell for a rechargeable battery whose terminal lug is cranked so that it comes to rest on their terminal lug when stacked with another cell.

According to the invention, "left" and "right" cells are stacked on top of each other to obtain a desired total capacitance or voltage. The terminal lugs come to lie one above the other, so that the connection of the cells can be made without further connecting wires or connecting webs. The terminal lugs can therefore be soldered directly to one another, welded (for example by ultrasonic welding or ultrasound compacting) or chemically reactively connected. The juxtaposition of cells, especially when connected in series, is thus particularly simple. at

Parallel connection of the cells may be additional (in small numbers)

Provide connecting bracket. A complex design in bimetal can usually be omitted.

It is advantageous in a cell if it additionally comprises a connection lug for connecting a temperature and / or voltage sensor. This way you can

Temperature and / or voltage sensor are particularly easy to connect.

The above embodiments and developments of the invention can be combined in any manner.

BRIEF DESCRIPTION OF THE FIGURES

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

Figure 1 shows a detail of a stack of single cells with intermediate cooling / heating plate; FIG. 2 shows a further detail of a stack of individual cells, each of which has a fold at its edge;

FIG. 3 shows a cooling / heating element from above;

Figure 4 is a plan view of a cooling / heating element with inserted or molded seal;

FIG. 5 shows a section through a stack of several individual cells with cooling / heating elements arranged therebetween;

FIG. 6 shows a cooling / heating element with a flow diaphragm in the inlet of a cooling surface;

Figure 7 shows a variant of a cooling / heating element with an inlet aperture and a drain plate;

FIG. 8 shows a stack of two identical cooling / heating elements;

FIG. 9 shows a cooling / heating element made of sheet metal;

Figure 10 spring characteristics of various disc springs;

FIG. 11 shows a volume compensation arrangement with a flexible container;

FIG. 12 shows a volume compensation arrangement with a rigid container;

FIG. 13a a basic element from below;

FIG. 13b a basic element from above;

Figure 14 shows a first embodiment of a cell;

FIG. 15 shows a second embodiment of a cell;

FIG. 16 shows an accumulator-separating unit; 17 shows a half-finished Paketakkumulator in an oblique view;

FIG. 18 a half-finished package accumulator in front view;

FIG. 19 shows an accumulator management unit;

FIG. 20 shows a fuse module with additional current sensors and high-voltage plugs;

FIG. 21 shows a finished packet accumulator in an oblique view;

FIG. 22 shows the upper area of a packet accumulator with fastening straps;

FIG. 23 shows a first variant of a duct for removing hot combustion gases; FIG.

Fig. 24 shows a second variant of a channel for the removal of hot fuel gases.

DETAILED DESCRIPTION OF THE INVENTION

Cooling:

For optimum battery operation, the cells thereof are cooled or heated to maintain an optimum operating temperature. When the cells of a

Accumulator are formed flat, their tempering can be done over the comparatively large flat areas of the battery. This can be done, for example

Aluminum plates are reached, which lead the heat to the edge of the cell. Another possibility are plates or bags, which are flowed through by a cooling medium. 1 shows a section of a stack 10 of individual cells 11, between each of which a cooling / heating plate 12 is arranged. The cooling / heating plate 12 has boundaries 13, which are connected to each other via flexible webs 14. In a specific embodiment of such a stack 10, a cooling water flow of approximately 3 g / s was provided for cooling, which flows through an approximately 0.2 mm wide gap within the cooling / heating plate 12. This results in a pressure drop of about 7 kPa. The same flow can also be used to heat the cells.

So that the cooling / heating plate 12 is in thermally conductive connection to the cells 11, the entire cooling water circuit can be pressurized (eg inflated to about 2 bar become). So that the pressing forces can act on the cell, the boundaries 13 of the cooling / heating plate 12 should have a freedom of movement. The boundaries 13 should therefore be connected only at the edge or have flexible webs. Since the pressing forces are transmitted directly to the cell, only very thin material thicknesses, such as 1 mm plastic or 0.2 mm sheet, are required for the boundaries 13 or walls.

FIG. 2 shows a further detail of a stack 20 of single cells 21 which each have a fold 22 at its edge. Advantageously, the space 23 between the cells 21 is used for the supply and / or removal of a cooling medium (see also FIG. 3 and FIG. 5).

Fig. 3 shows a cooling / heating element 30 from above. The cooling / heating element 30 comprises an inlet 31, a cooling surface 32 and a drain 33. About the four side edges of the

Cooling surface 34, 35, 36 and 37 are different ways conceivable as the cooling medium from the inlet 31 via the cooling surface 32 to the outlet 33 can pass. Representing two variants are shown in FIG. 3. In a first variant, a cooling / heating element 30a is flowed through from the side edge 34 to the side edge 36 from left to right. In a second variant, a cooling / heating element 30b flows from bottom to top, ie from the side edge 35 to the side edge 37. Of course, many other variants are conceivable, in particular a meandering arrangement of the cooling channels. The cooling / heating elements 30, 30a, 30b can be stacked on top of each other, with the feeds 31 and outflows 33 coming through each other resulting in a continuous supply and discharge. In order to ensure the tightness, seals can also be provided, which consists for example of the material of the cooling / heating element 30, 30a, 30b, a molded seal or an inserted seal. Finally, the cooling / heating elements 30, 30a, 30b (in groups) can be glued together. As a concrete embodiment, Fig. 4 shows a plan view of a cooling / heating element 40 with inserted or molded seal 41st

FIG. 5 shows a section AA through a stack 50 of a plurality of individual cells 51 with cooling / heating elements 53 arranged therebetween. The individual cells 51 are provided with a fold 52 as in FIG. The cooling / heating elements 53 have an inlet 54 and a drain 55. In a variant of the invention, the edge 56 of the cooling / heating element 53 is made so high that a certain minimum distance is ensured between the cells 51 can and the cooling surfaces 58 of the cooling / heating elements 53 can not be compressed excessively.

Namely, the cells 51 can no longer be moved towards each other as soon as they lie with their fold 52 on the edge 56 or the inlet 54 or outlet 55.

It is also clear from FIG. 5 how the space 57 remaining between the cells 51 can be utilized by the inlets 54 and outflows 55. Alternatively or additionally, spacers may themselves be integrated in a cooling surface 58. The spacers can be integrated into the boundaries only on one side or on both inner sides of the cooling / heating element 53 or also, for example, by a separate

Component (not shown) may be realized, e.g. an inserted grid or mesh or flexible bars. Also mentioned in Fig. 1 flexible webs 14 may be designed so that a certain residual gap width is ensured even at relatively high forces acting on the cooling / heating element 53 forces and thus the webs 14 also fulfill the spacer function. In the webs 14 of FIG. 1, this is ensured because the tabs of the webs 14 come to rest on each other with excessive force and de facto can not be further compressed. Finally, the two boundaries of a cooling surface can also be designed such that one is rigid and the other is flexibly suspended. This achieves a better, stable positioning of the cells 51 in the stack.

Fireproof insulation:

In the event of overheating, overcharging or other improper use, a so-called "thermal runaway" can occur, whereby the entire chemical and electrical energy stored in a cell 51 is converted within 5 to 25 seconds, resulting in locally very high temperatures of over 700 ° C C, because of the

desired high packing density of the cells 51, the two adjacent cells 51 in the same module (often these modules are composed of about 12 cells) ignited. If a plurality of modules are arranged next to one another in such a way that the fireball of the first through-cell 51 ignites one or more cells 51 of the neighboring modules, a result is created

Chain reaction. In the case of a thermal runaways, the spread of the source of fire to adjacent cells 51 in the cell stack 50 or to neighboring cell stacks should be prevented as far as possible. For this purpose, the cooling / heating elements 53 are advantageously made of sheet metal. The existing water cooling, when a connected to the cooling / heating elements 53 circulating pump runs, dissipate the heat energy. To the

Heat load on the cooling / heating elements 53 still keep as low as possible, between the cells 51 and the cooling / heating elements 53 a refractory

Flies (heat-resistant, flame-retardant or refractory tissue or paper - not shown) to be inserted. This acts as an additional thermal insulation against very high temperatures and thus reduces the heat transfer from the burning cell 51 to the cooling / heating element 53 to a tolerable level. Thus, the fire can be limited to this one cell 51. In normal operation, due to the very low thermal performance (only about 1% of the thermal runaway) compared to the thermal runaway, there is no or no significant limitation in heat transfer from the cell 51 to the cooling / heating element 53.

The heat-resistant, flame-retardant or refractory layer can be dimensioned the thinner, the lower their thermal conductivity. Under normal

Conditions is the transferred from the cell 51 in the cooling system heat output less than 0,2kW / m2 and causes said layer, a temperature drop of about 2 ° C. In the case of a thermal runaways, a heat output of up to 20 kW / m2 may occur, causing a desired high temperature drop of around 200 ° C at this layer. The

Cooling water next to the burning cell 51 is heated to 100 ° C - by the

Cooling cycle, this energy is then evenly distributed over the entire mass of the battery without thereby reaching critical temperature values.

The removal of hot combustion gases can be done via cooled with a cooling medium channels which are laterally integrated in the cooling / heating elements 53 (not shown - see also Figures 23 and 24).

Flow in the cooling surface:

As the gap in the cooling surface increases, more cooling medium flows through this gap or capillary than through tight capillaries. This leads to an undesirable uneven heat dissipation or supply. This effect can be counteract by providing a flow restrictor with a constant, independent of the movement of the boundaries of the cooling / heating surface, cross-section. This is preferably integrated on the inlet side. 6 shows a cooling / heating element 60 with an inlet 61, a cooling surface 62 and a drain 63. Furthermore, the cooling / heating element 60 comprises a flow orifice 64 which has an opening with a cross section which is independent of the gap thickness in FIG the cooling surface 62 remains substantially constant. 6 shows a cooling / heating element 60a with a reduced cross section and a cooling / heating element 60b with an expanded cross section. It can clearly be seen that the opening of the flow aperture 64 and thus the flow of the cooling medium through the cooling surface 62 remains essentially the same.

FIG. 7 shows a further variant of a cooling / heating element 70 with an inlet 71 of a cooling surface 72, a drain 73, an inlet aperture 74 and a drain aperture 75. If the gap thickness of the cooling surface 72 decreases, the inlet aperture 74 is opened further and the drain aperture 75 further closed (see cooling / heating element 70a). When the gap thickness of the cooling surface 72 increases, the inlet orifice 74 is narrowed and the drainage orifice 75 is widened (see cooling / heating element 70b). In this way it is achieved that in a relatively narrow gap, a relatively high pressure prevails, since the pressure reduction takes place so only at the drain plate 75. However, the high pressure now causes the gap thickness in the cooling / heating element 70 to increase. At a relatively wide gap, however, the pressure is already degraded at the inlet aperture 74, so that there is a relatively low pressure in the gap itself. The low pressure now causes the gap thickness in the cooling / heating element 70 to decrease. As it were, there is a hydraulic regulation of the gap thicknesses of the individual cooling / heating elements 70 arranged in a cell stack.

gearing:

FIG. 8 shows a stack 80 of two identical cooling / heating elements 81 (here embodied in plastic). Each cooling / heating element 81 comprises an inlet 82, a cooling surface 83 and a drain 84. For a better cohesion of the stack 80, each cooling / heating element also has a toothing 85, which slipping the cooling / heating elements 81 in the stack 80th prevented. Preferably, the gearing 85 can shear forces in each

Transfer direction. It can be arranged offset one or more rows. Furthermore, the toothing 85 is in a particularly advantageous embodiment selbstverrastend (insoluble or detachable) executed. This simplifies the assembly, especially if the individual cooling / heating element are glued together, since so a pressing against each other of the parts can be omitted until the curing of the adhesive by a separate device. The latching can be designed, for example, trapezoidal. Preferably, the toothing 85 is designed meander-shaped in order to avoid notch effects. In FIG. 8, only one tooth flank per side is executed in each case. Advantageously, however, many tooth flanks are executed on each side. For example, the teeth are 2-5 mm wide. Finally, a cooling / heating element 81 also comprises a fastening tab 86 for a cell monitoring circuit (see also FIG. 18). Advantageously, the attachment tabs 86 include latches for attachment and coding ribs for proper positioning of the

Cell monitoring circuits along the cooling / heating elements 81 on.

In a specific embodiment, the cooling / heating elements 81 were made of plastic, wherein the wall thickness at the edge about 1.5-2 mm, at the bottom of the tub was about 0.6 mm. The material is durable with 6-7 N / mm2 at -40 C to 85 ° C or durable and dense for water and / or glycol at 2 bar and a temperature of -40 C to 85 ° C. Advantageously, the plastic for a short time and once higher

Resist temperatures of over 200 ° C.

Fig. 9 shows an alternative cooling / heating element 90, which is made of sheet metal

manufactured (deep-drawn) is. For stacking the individual cooling / heating elements 90, this also comprises a seal 91. In a specific embodiment, the upper area was made of 0.6 mm, the trough area of 0.2 mm thick material. Preferably, the sheet is anti-corrosion coated.

Cooling medium:

Advantageously, the cooling medium has a high specific heat capacity is

frost-protected, is not corrosive to the materials used, has a low

Surface tension on and is dirt dissolving (under dirt are in this

Context also to understand dissolved gases or gas bubbles). These properties can also be improved by the addition of suitable substances (for example antifreeze, surfactant,

Antikorrosionsmittel, etc.) to one or more basic substances can be achieved. Since the cell stack is floatingly mounted in the arrangements shown, that is, "floating" in the cooling medium as it were, the cells are protected against shocks and high accelerations, and the cooling medium preferably has a high density put under correspondingly high pressure. The cooling medium is advantageously liquid, but may of course also be gaseous.

Equal volume:

Since the thickness of a cell has tolerances and this periodically changes during loading or unloading, a container for volume compensation is advantageous. Moreover, it is advantageous if a container for collecting the gas bubbles contained in the cooling medium is provided. This can be two different containers or one and the same container. For the cells to be under a uniform pressure, the entire cooling system is pressurized. This can be done before each operation of the cells via a small pump, which pushes the cooling medium from a reservoir into the cooling / heating elements, or the entire system is factory-set under pressure after assembly. So that the pressure with temperature fluctuations or

Charge change of the cells (thereby changing the thickness of the cells) does not change as possible, the volume expansion tank is advantageous under mechanical pressure, which is preferably realized by means of disc springs. Disc springs allow a suitable choice of the spring characteristic, which generates an approximately constant force over a larger stroke. Fig. 10 shows spring characteristics 100 different disc springs. The force F is plotted over the path s. The disc springs differ by

different ratios of material thickness to the height of the diaphragm spring. By a suitable choice, a force F which is nearly constant over a longer path can now be achieved. In the lower right diagram an advantageous characteristic region 101 is shown, which ranges from about 25% to 90% of the spring travel s.

11 now shows a first variant of a volume compensation arrangement 110 consisting of a flexible container 111 and a plurality of disk springs 112, which exert a more or less constant force on the container 111. In the front region of the container 111 there is an opening 113, via which the container 111 to the cooling circuit

can be connected.

FIG. 12 shows a second variant of a volume compensation arrangement 120, consisting of a rigid container 121 with an opening 122 for connection to the cooling circuit. In the container 121, a flexible container 123 is arranged, which exerts a pressure on the liquid contained in the container 121 via disc springs 124. Of course it is also possible, instead of the flexible container 123 to provide a piston on which the disc springs 124 act. In a specific embodiment, the volume expansion tank with a

Diameter of 65 mm and a length of 220 mm, resulting in a volume of about 730 cm. The container is pressure-resistant for a nominal pressure of approx. 2 bar. Approximately 100 disc springs with a diameter of 25 mm, a height of 1.4 mm and a material thickness of 1 mm were provided for the pressure generation. The disc springs can be made of metal or plastic. The flexible container 123 was finally made with a diameter of 63 mm and a length of 150 mm and is made of sheet metal.

Basic Element:

Figures 13a and 13b show a base member 130 from below (Figure 13a) and from above (Figure 13b). In the assembled state, the surface visible in FIG. 13a is located on the outside and the rib structure visible in FIG. 13b on the inside. The base member 130 having a surface externally curved for proper distribution of force is used to construct the (package) accumulator. Advantageously, the surface is curved in such a way that later used clamping bands for the assembly cause a uniform force distribution on the base. So that the tensioning strap can be tensioned and tensioning locks can be accommodated to connect the ends of the tensioning strap, the surface in the middle is concavely arched. Here too, an even force is applied to the surface. The surface is curved in the illustrated embodiment only in one direction. In a further embodiment, however, the surface may also be curved in both directions, resulting in a 3D curvature. From the surface, the forces are guided by ribs positioned directly above the straps to the lowest cooling / heating element. In order that the force distribution to the surface of the lowermost cooling / heating element is uniform, an additional, intermediate rigid plate is advantageous. In one variant, the cover element is constructed the same or substantially the same as the base element 130.

Connections of the cells:

14 shows a first embodiment of a cell 140 with a positive terminal 141 and a negative terminal 142, via which the electrical power is supplied and removed. In addition, branches 143 are provided, via which an electronic circuit for monitoring the cell 140 can be connected. The branches 143 can be designed as a flat contacts for a subsequent conductive bonding or plug pins. For the connection of a plurality of cells 140, the terminals 141 and 142 are bent or cranked. The positive terminal 141 is here in Fig. 14 upward, the negative terminal 142 bent downwards.

So that the cells 140 can be directly connected to each other without intermediate elements, two bending variants are required - a "left" and a "right" variant. 15 shows a cell 150, which is designed in mirror image to the cell 140 of FIG. 14. The cell 150 analogously comprises a positive terminal 151 and a negative terminal 152, via which the electrical power is supplied and removed. The positive terminal 151 is up, the negative terminal 152 is bent down. In addition, in turn

Branches 153 available over which an electronic circuit for monitoring the cell 150 can be connected.

In the example shown, the branches 143 and 153 are arranged both at the positive terminals 141 and 151 and at the negative terminals 142 and 152. In the assembled state, that is, after stacking the cells 140 and 150, twice as many branches 143 and 153 are thus present as would actually be required. In an alternative embodiment, the branches 143 and 153 are therefore arranged only at the positive terminals 141 and 151 or only at the negative terminals 142 and 152 (applies to series connection of the cells 140 and 150).

The connection of the cells 140 and 150 can now take place without further elements, for example by welding, in particular ultrasonic welding or ultrasonic compacting, or by chemically reactive bonding. The cells 140 and 150 are provided for series connection. For a parallel connection other bending variants would be provided. The parallel connection of several modules (i.e., multiple series connected cells 140 and 150) can also be done over longer connections or by means of separate ones

Bridge plates (e.g., aluminum or copper) are made.

Construction of a package battery

Starting from the basic element 130 from FIGS. 13a and 13b, optionally an additional rigid plate for more even distribution of the forces, a cooling / heating element 81 from FIG. 8, a cell 140 from FIG. 14, another cooling / heating element 81 are alternately formed and a cell 150 of Fig. 15 stacked. Depending on requirements, this sequence of cooling / heating element 81, cell 140, cooling / heating element 81 and cell 150 can be repeated as often as desired. The stack obtained is stable without further measures by the teeth on the edge of the cooling / heating element 81 (see also Fig. 17). In experiments, stacks of about 1 m in height could be built easily. Advantageously, however, groups of cooling / heating elements 81 (and cells 140, 150) can also be glued together, in particular adhesively bonded. Preferably, such modules are in an upstream

Assembly step made, so that during the final assembly of the package batteries only a few modules must be stacked on each other.

Battery disconnect unit (Battery Disconnect Unit)

Fig. 16 shows an accumulator-separating unit 160. The figures clearly show

Reinforcing ribs in the interior of the accumulator-separating unit 160, which for a

Power transmission between upper and lower joint surface provide. The electrical function of the accumulator-separation unit 160 is known per se. The battery disconnect unit 160 is designed to electrically isolate the high voltage circuit from the vehicle or other devices connected thereto by means of relays. Furthermore, the accumulator-separation unit 160 comprises a pre-charge circuit, which establishes an ohmic connection between the accumulator and the vehicle before the actual switching of the relays in order to be able to compensate for potential differences. Finally, in the illustrated variant, the battery separator unit 160 includes current sensors and voltage sensors for

Measurements in the high voltage range and for monitoring the relay function.

Fig. 17 shows a half-finished Paketakkumulator 170, consisting of the previously obtained stack 171 and an attached accumulator-separating unit 172. Good to see is also the teeth 173 of the individual cooling / heating elements and the connected

Contacts 174 of the individual cells. The accumulator-separating unit 172 also has a cooling passage 175 so that the cooling medium can flow into the accumulator-separation unit 172 from the cooling / heating element disposed below the accumulator-disconnecting unit 172 (in FIG better imaginable half the axes of the cooling channels drawn). For stiffening, the accumulator-separating unit 172 also has

Reinforcing ribs 176 in order to forward the sometimes high forces within the stack can. All electrical connections (both high voltage and low voltage) are advantageously arranged in a connecting plane 177, whereby a particularly simple electrical connection technology can be applied.

Cell supervision unit (Cell Supervisor Circuit)

Fig. 18 shows a half-finished Paketakkumulator 180, consisting of stacked cooling / heating elements 181, an accumulator-separating unit 182 placed thereon and other cooling / heating elements 181. An area 183 indicates where later

Cell monitoring unit is arranged. The cell monitoring unit is positioned directly between cell terminals. This area is bordered by webs of the cooling / heating element. These webs, provided with suitable detents, form the holder of the cell monitoring unit and advantageously contain elements which enable coding or secure positioning of the cell monitoring unit over the lateral cell

Cell branches allowed. These cell branches are designed for conductive splices or directly for plugging. Any sticking of the cell monitoring unit to the cell branches may be due to large vias in the board

Cell monitoring unit done. If the cell branches are kept very short, then there is a good thermal connection to the cell body, whereby the sensors for

Temperature measurement can be positioned directly on the board of the cell monitoring unit, but in the vicinity of the cell branches. Thus, a part of the low-voltage wiring including the plug to the cells, as they are required in conventional systems omitted. Due to the small distance between the individual cell monitoring units to each other, an arrangement of several cell monitoring units on a single (here elongated) board is conceivable. The maximum length is limited in itself only by the thermal expansion properties of the cooling / heating element and the boards or the maximum producible board lengths. The

The purpose of the cell monitoring unit is to measure the voltage and / or temperatures of the cells, to allow the cells to be balanced, and to ensure communication between different cell monitoring units. Advantageously, the connection between several cell monitoring units via a

Voltage potential bridging connection to problems because of sometimes high

Potential differences (a stack of cells can generate several hundred volts of voltage). For example, the cell monitoring units may be connected by optical means or by radio. In both cases the communication can be done serially from cell monitoring unit to cell monitoring unit but also from each one Cell monitoring unit to any other cell monitoring unit done. Also conceivable is a star-shaped communication to a central control unit.

Of course, hybrids are also conceivable.

Accumulator Management Unit (Battery Management Unit)

Fig. 19 shows an accumulator management unit 190 (shown here with the housing open). The accumulator management unit 190 is essentially for this

provided to control the processes in the accumulator and to allow communication with the vehicle or other device connected to the accumulator. In the illustrated variant, the accumulator management unit 190 for this purpose comprises two processors, which control, for example, measuring processes, trigger relays for disconnecting the battery from the consumer, etc.

The accumulator management unit 190 (shown here without covering the electronics) forms the upper end element of the package battery and, like the basic element, has a curved top. Advantageously, the surface is curved in such a way that later used clamping bands for the assembly cause a uniform force distribution on the base. So that the tensioning strap can be tensioned and tensioning locks can be used to connect the ends of the tensioning strap, the surface is concave in the middle. Here too, an even force is applied to the surface. The surface is curved in the illustrated embodiment only in one direction. In another

Embodiment, the surface may also be curved in both directions, so that there is a 3D curvature. From the surface, the forces of ribs positioned directly below the tension bands are guided to the element below the accumulator management unit 190. In order for the force distribution to this element is uniform, an additional, intermediate rigid plate is advantageous. Preferably, the element underlying the accumulator management unit 190 is a cooling / heating element (e.g., as known from Fig. 8). Via webs or ribs in the housing of the accumulator administration unit 190, an electronic circuit of the same or its circuit board is pressed against the cooling / heating element, so that an optimal heat transfer can take place. In particular, the accumulator manager s unit 190 may include power circuits as well. The external connection of the accumulator management unit 190 can be made via a connector strip, which advantageously in the same plane as other contacts of the

Accumulator lie (namely in the connection plane 177 of FIG. 17). Advantageously, the Plug connector of the accumulator management unit 190 used directly for the low-voltage terminal of the packet accumulator and has at least one connector chamber (not shown), which lies in said plane to allow the internal low-voltage connections. Although the accumulator management unit 190 is advantageously located on the top side of the packet accumulator, as shown in FIG. 19, it can of course also be embodied as a module located inside the packet accumulator.

Module with current sensor, fuse and high-voltage plug

Fig. 20 shows a fuse module 200 (shown here without the associated electronics), which additionally includes current sensors and high-voltage connector. In the case of a distributed system (that is to say an association of a plurality of packet accumulators), an identical security module 200 is advantageously installed in each of the individual packet accumulators in order to be able to protect each packet accumulator separately in the event of a short circuit. The current sensor can also be accommodated in another module (in particular in the accumulator-separating unit shown in FIG. 16).

Straps:

Fig. 21 now shows a finished Paketakkumulator 210, consisting of a

Basic element 211, a plurality of cooling / heating elements 212 with internal cells (not shown), an accumulator-separation unit 213, another cooling / heating element 214, a fuse module 215, additionally comprising current sensors and high-voltage connector, another cooling / Heating element 216 and a Akkumulator- management unit 217. In the example shown, the entire assembly is held together by tension bands 218 (here by 4 clamping bands 218). For clamping, the clamping bands 218

Turnbuckles on, advantageously under the base member 211 or above the

Accumulator management unit 217 are performed.

The straps can be made of rubber, steel, plastic or fiber-reinforced plastic. The choice of material depends on the forces to be transmitted and on the thermal expansion properties of the tapes and the module composite, that is, the tension tapes 218 should be matched in terms of their elongation properties on the expansion behavior of the module composite. The clamping bands 218 transmit the pressing forces of the cells from the base element 211 to the upper end plate (here in the form of the accumulator). Management unit 217). In addition, forces are transmitted which act on the toothed edges of the cooling / heating element 212, 214 and 216 and give the only mated module composite a bias or the required stability.

The outer edges of the individual components form a strong, preloaded, solid housing for the accumulator. The boundaries or walls of the cooling surfaces of the cooling / heating elements 212, 214 and 216 (see also Fig. 5) form an inner stiffening of the housing. With usual numbers of approximately 50 cells for a Paketakkumulator 210 resulting in 100 walls (2 per cell) across the accumulator 210 so that an extremely stiff but still lightweight housing is created, similar to a stiffened by bulkheads or ribs ship or aircraft fuselage.

The straps 218 may be recessed into the surface at the periphery of the housing for protection (recess in the surface of the module assembly). For better representability, a cover on the front of the

Accumulator 210, which takes over the task of contact protection and sealing, not yet appropriate.

The length of the tension bands 218 can be changed very easily, so that many different types of package accumulators 210 can be manufactured very easily from the individual components. Nevertheless, of course, other mounting options are conceivable. For example, the accumulator can be screwed. Especially suitable here are threaded rods whose length can also be easily adapted to different conditions. These threaded rods are pushed through holes in the modules, for example. The attachment is then done by nuts. It is also conceivable that above and below the Paketakkumulators 210 bridges are provided, which have at their ends holes for said threaded rods and so hold the Paketakkumulator 210 together.

Attachment points of the package accumulator:

To be able to mount the package accumulator in a vehicle or other device to be supplied with energy, suitable attachment points are on

Packet accumulator required. Fig. 22 shows the upper portion of a

Paketakkumulators 220, namely a lid 221 to which a clamping band 222 with a Turnbuckle 223 is placed. Between cover 221 and strap 222 are

Attach mounting tabs 224, which allow the attachment of the Paketakkumulators 220 in, for example, a vehicle. Advantageously, the lid 221 and / or the tabs 224 to a toothing 225, which prevent mutual slippage or at least reduce. Of course, it is also possible to additionally or alternatively provide tabs on the underside of the Paketakkumulators 220. Of course, it is also conceivable that the tabs are part of the bottom or lid of the Paketakkumulators 220 or attached in any other way, for example by screwing. In particular, the tabs 224 may be disposed between the lid 221 and the bridges mentioned with reference to FIG. 21.

Removal of hot fuel gases:

FIG. 23 shows a further section of a stack 230 of individual cells 231, each of which has a fold 232 at its edge, which is very similar to the stack 20 from FIG. Again, the space 233 between the cells 231 is used for the supply and / or removal of a cooling medium. In this variant, but is an additional with a

Cooling medium cooled channel 234 provided for the discharge of hot fuel gases.

FIG. 24 shows a section through a stack 240 of a plurality of individual cells 241 with cooling / heating elements 243 arranged therebetween, which is very similar to the stack 50 from FIG. 5. The individual cells 241 are in turn provided with a rebate 242. In this variant, an additional cooled with a cooling medium channel 244 is also provided for the removal of hot combustion gases. In order for the fuel gases to escape into the channel 244, openings are provided between the end face of the rebate 242 and the channel 244 in the edge of the cooling / heating elements 243. For example, the edge of the cooling / heating elements 243 is crenellated. In Fig. 24 further connecting channels 245 are provided to the cooling / heating elements 243. But this is only an example to see

Of course, other embodiments of the cooling / heating elements 243 and the channel 244 are conceivable. It is also conceivable that the channels of the cooling / heating elements 243 and the channel 244 are not separated, but executed together.

Finally, it is noted that the representations in the figures partially

are not true to scale. Furthermore, the individual variants shown in the figures can also form the subject of an independent invention.

Claims

claims:

An accumulator (170, 180, 210) comprising a stacked one

Basic element (130, 211), a cover element (190, 217, 221) and at least one cooling / heating element (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81, 90, 181, 212, 214, 216) between the base member (130, 211) and the lid member (190, 217, 221) and at least a first and a second cell (11, 21, 51, 140, 150), which the cooling / heating element are adjacent inside the stack.

Second accumulator (170, 180, 210) according to claim 1, characterized in that at least one of the arranged in the stack cooling

Heating elements (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81,

90, 181, 212, 214, 216) has a height in the stacking direction that is less than its height

Length and width transverse to the stacking direction, preferably all stacked cooling

/ Heating elements.

3. Accumulator (170, 180, 210) according to claim 1 or 2 with at least two cooling / heating elements (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81,

90, 181, 212, 214, 216), characterized in that a first boundary (13) of a cooling / heating element, which is in physical contact with a first cell (11, 21, 51, 140, 150) of the accumulator (170, 180, 210) is provided, parallel to a second boundary (13) of a second cooling / heating element, which for body contact to a second

Cell (11, 21, 51, 140, 150) of the accumulator (170, 180, 210) is provided, preferably, all the boundaries of all cooling / heating elements, which are provided for body contact to a cell of the accumulator, aligned parallel to each other are.

4. accumulator (170, 180, 210) according to one of claims 1 to 3, characterized

in that at least one of the cells (11, 21, 51, 140, 150) arranged in the stack is designed as a flat cell, preferably all cells arranged in the stack.

5. accumulator (170, 180, 210) according to one of claims 1 to 4, characterized

characterized in that the, preferably all, cell / s in plan view of the stack extends over approximately the same surface as that, preferably all, cooling / heating / e, this surface is preferably formed quadrangular.

6. Accumulator (170, 180, 210) according to one of claims 1 to 5, characterized in that the medium in the cooling

/ Heating element (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81, 90, 181, 212, 214, 216) is under pressure.

7. accumulator (170, 180, 210) according to one of claims 1 to 6, characterized

characterized in that between a boundary (13) of a cooling / heating element (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81,

90, 181, 212, 214, 216) and a cell (11, 21, 51, 140, 150) a fire retardant material is arranged, in particular a refractory fleece, a refractory fabric or refractory paper.

8. accumulator (170, 180, 210) according to one of claims 1 to 7, characterized

in that the surface of the base element (130, 211) and / or

Cover element (190, 217, 221) is curved outwardly, in particular with a central indentation.

9. Accumulator (170, 180, 210) according to any one of claims 1 to 8, characterized by a control arranged in the stack (160, 172, 182, 190, 213, 217) with an electronic control module, which for controlling switching and / or measuring operations in the accumulator (170, 180, 210) is provided.

10. accumulator (170, 180, 210) according to claim 9, characterized in that the control element (160, 172, 182, 190, 213, 217) to a cooling

/ Heating element (12, 30, 30a, 30b, 40, 53, 60, 60a, 60b, 70, 70a, 70b, 81, 90, 181, 212, 214, 216) adjacent.

11. Accumulator (170, 180, 210) according to claim 9 or 10, characterized in that as a control accumulator-separation unit or Battery Disconnect Unit (160, 172, 182, 213) and / or a Akkumulator- management unit or Battery Management Unit (190, 217) is provided.

12. Accumulator (170, 180, 210) according to one of claims 1 to 11, characterized in that electrical connections (141, 142, 143, 151, 152, 153) of the

Individual elements of the accumulator (170, 180, 210) lie substantially in one plane (177).

13. accumulator (170, 180, 210) according to one of claims 1 to 12, characterized

characterized in that all temperature and / or voltage sensors for monitoring the cells (11, 21, 51, 140, 150) and / or circuit parts for balancing the

Cells (11, 21, 51, 140, 150) are arranged on a circuit board.

14. accumulator (170, 180, 210) according to one of claims 1 to 12, characterized

characterized in that temperature and / or voltage sensors for monitoring the cells (11, 21, 51, 140, 150) and / or circuit parts for balancing the

Cells (11, 21, 51, 140, 150) are arranged on different boards and between the boards a potential-free communication connection is provided.

15. Accumulator (170, 180, 210) according to claim 14, characterized in that as potential-free communication connection an optical data connection or a

Radio connection is provided.

16. Accumulator (170, 180, 210) according to any one of claims 12 to 15, characterized in that the electrical connections (141, 142, 143, 151, 152, 153) are connected to a cell monitoring unit or a Cell Supervisory Cuircuit ,

17. Accumulator (170, 180, 210) according to one of claims 1 to 16, characterized

in that a strap (218, 222) is arranged around the stack.

18. Accumulator (170, 180, 210) according to claim 17, characterized in that the clamping band (218, 222) consists of one of the materials: rubber, metal, plastic, fiber-reinforced plastic.

19. Accumulator (170, 180, 210) according to any one of claims 17 to 18, characterized in that the clamping band (218, 222) has a turnbuckle (223).

20. Accumulator (170, 180, 210) according to any one of claims 17 to 19, characterized by retaining tabs (224) which between a tension band (218, 222) and a

Base element (130, 211) or cover element (190, 217, 221) are clamped.

21. Accumulator (170, 180, 210) according to any one of claims 1 to 16, characterized by over the stack vertically extending tension elements, in particular threaded rods, which are provided for the cohesion of the stack.

22. Accumulator (170, 180, 210) according to claim 21, characterized by a horizontal reaching over the stack bridge, in particular of flat material, a U-profile or a tubular profile, which has elements for receiving the tension elements at the ends, in particular holes for Pick up a threaded rod.

23. Accumulator (170, 180, 210) according to claim 22, characterized by

Retaining tabs (224) which are clamped between a bridge and a base member (130, 211) or cover member (190, 217, 221).