JP6135343B2 - Wiring module and power storage module - Google Patents

Description

  The present invention relates to a wiring module and a power storage module.

  A power storage module mounted on a vehicle such as an electric vehicle or a hybrid vehicle has a plurality of power storage elements arranged side by side. The plurality of power storage elements are connected in series or in parallel by connecting adjacent electrode terminals with a connecting member such as a bus bar.

  In the battery wiring module of Patent Document 1, a plurality of bus bars are accommodated side by side in a resin protector configured by connecting four connecting units, and the four connecting units are integrally covered with a lid.

  The battery wiring module can be attached to a plurality of single cells by fastening the bus bar of the battery wiring module placed on the plurality of single cells to the electrode of the single cell with a bolt and covering the resin protector with a lid. The module is attached to a plurality of single cells.

JP 2013-54995 A

By the way, when the power storage module is used in a high temperature state, the life of the power storage module is reduced. Therefore, it is required to attach a temperature sensor or the like for detecting the temperature of the power storage element to the power storage module.
Therefore, it is conceivable that a temperature sensor or the like is attached to a resin insulation protector in advance, and the temperature sensor or the like is arranged so that the state of the storage element can be detected when the wiring module is assembled to the unit cell.

Here, when the process of attaching the temperature sensor or the like to the insulation protector is performed separately from the process of assembling the wiring module to the storage element, after one process is completed, the other process is completed. There is a concern that defects may occur in the parts assembled in between.
In the configuration of Patent Document 1, if a temperature sensor is attached to the insulation protector, the cover portion covers the entire insulation protector, and therefore the cover portion needs to be attached after all steps are completed. Therefore, for example, if the temperature sensor is attached prior to the fastening of the connecting member, the temperature sensor and the electric wire connected to the temperature sensor are exposed to the outside after the fastening of the connecting member is finished and covered with the lid. There is a risk that problems may occur in the mounting state of the temperature sensor or the like.

  This invention is completed based on the above situations, Comprising: It aims at providing the wiring module which can suppress that a malfunction arises in the attachment state of a connection member, a detection member, etc. .

The present invention is a wiring module attached to a power storage element group in which a plurality of power storage elements having positive and negative electrode terminals are arranged, wherein the connection member that electrically connects the adjacent electrode terminals, and the connection member An insulating protector provided with a main body to be held and an insulating cover connected to the main body via the first hinge portion and covering the main body; a detection member attached to the main body for detecting the state of the power storage element; An insertion recess into which the detection member is inserted, and the insulating cover includes a first cover portion that covers at least a part of the detection member, and a second cover that covers the connection member. A cover part, and a second hinge part connecting the first cover part and the second cover part, wherein one of the first cover part and the second cover part is the detection member or the second cover part. While covering the connection member, the movement of the other of the first cover portion and the second cover part are openable, said first cover portion, the sensing member is inserted into the insertion recess The regulation wall that regulates is protruding.

  According to this configuration, the insulating cover is in a state where one of the first cover part and the second cover part covers the detection member or the connection member, and the other of the first cover part and the second cover part is It can be opened. Thereby, even when the step of fastening the connection member and the step of attaching the detection member to the main body are separate steps, the other step can be performed while covering and protecting one of the connection member and the detection member with the insulating cover. It becomes possible. Therefore, it is possible to suppress the occurrence of problems in the attachment state of the connection member, the detection member, and the like.

It is preferable to have the following configuration as an embodiment of the above configuration.
The one or the main body of the first cover part and the second cover part includes a temporary holding part, and the other of the first cover part and the second cover part is the temporary holding part. To be held and held in an open state.
If it does in this way, it will become possible to improve workability at the time of performing work about a connection member or a detection member.

The main body includes a locked portion, and the one of the first cover portion and the second cover portion is locked to the locked portion with the one covering the main body. And a restriction locking portion for restricting the opening of the one side.

The first hinge portion connects the main body and the first cover portion.
If it does in this way, after attaching a detection member to a main part, a 2nd cover part can be open | released and the fastening operation | work of a connection member can be performed.

The detection member is a temperature sensor that detects the temperature of the connection member in order to detect the state of the power storage element.
A power storage module including the power storage element group and the wiring module.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress that a malfunction arises in the attachment state of a connection member, a detection member, etc.

The top view which shows the electrical storage module with which the wiring module of Embodiment 1 was mounted | worn with the electrical storage element group. Side view showing power storage element Top view showing the wiring module with the insulation cover closed AA sectional view of FIG. Top view showing the wiring module with the insulating cover open The top view which shows the state which closed the 1st cover part, opened the 2nd cover part, and was temporarily hold | maintained BB sectional view of FIG.

<Embodiment 1>
Hereinafter, Embodiment 1 will be described with reference to FIGS.
As shown in FIG. 1, the wiring module 20 of this embodiment is attached to a power storage element group 11 in which a plurality of power storage elements 12 are arranged to constitute a power storage module 10. The power storage module 10 is used as a drive source for a vehicle such as an electric vehicle or a hybrid vehicle. In the following description, with respect to the front-rear direction, the upper part of FIG. 1 is the front, the lower part is the rear, the right-and-left direction is based on the direction of FIG. 1, and the vertical direction is described with reference to the directions of FIGS.

  As shown in FIG. 1 (left and right sides are omitted in FIG. 1), the power storage module 10 is attached to a power storage element group 11 composed of a plurality of power storage elements 12 arranged side by side, and a plurality of power storage elements 12. Wiring module 20 to be configured.

As shown in FIG. 2, the electricity storage element 12 includes nut-like electrode terminals 13A and 13B (a positive electrode 13A, which protrudes vertically from an end surface of a flat rectangular main body 12A in which an electricity storage element (not shown) is accommodated. The negative electrode is shown as 13B).
The outer peripheries of the electrode terminals 13A and 13B are covered with a cylindrical synthetic resin 14.

  The polarity (positive / negative) direction of each power storage element 12 is arranged so that the power storage elements 12 adjacent to each other are opposite to each other, and thereby the electrode terminals 13A and 13B having different polarities are adjacent to each other. ing. The plurality of power storage elements 12 are fixed by a holding plate (not shown).

(Wiring module 20)
As shown in FIG. 5, the wiring module 20 includes a plurality of connection members 21 that connect between the electrode terminals 13 </ b> A and 13 </ b> B of the adjacent power storage elements 12, and the temperature of the connection member 21 in order to detect the state of the power storage elements 12. A temperature sensor 24 (an example of a “detection member”) to be detected, and a plurality of connection members 21 and an insulation protector 30 that holds the temperature sensor 24 are provided.

The connecting member 21 is formed by pressing a metal plate made of copper, copper alloy, stainless steel (SUS), aluminum or the like into a predetermined shape, and has a substantially rectangular shape as a whole. The surface of the connecting member 21 is plated with a metal such as tin or nickel. The connection member 21 is formed with a pair of substantially circular insertion holes 22 through the connection member 21.
Each insertion hole 22, 22 is inserted into a shaft portion of a bolt (not shown) that is connected to the screw hole of the electrode terminals 13 </ b> A, 13 </ b> B and fastens the connection member 21. When the connecting member 21 is sandwiched and fastened between the head of the bolt and the electrode terminals 13A and 13B, the adjacent electrode terminals 13A and 13B and the connecting member 21 are electrically connected. At the side edge of the connecting member 21 in the connecting direction, a notch 23 is formed to reduce the width of the connecting member 21 in a step shape.

(Temperature sensor 24)
The temperature sensor 24 includes a temperature detection element 25 and a housing member 26 in which the temperature detection element 25 is housed (see FIG. 3).
The temperature detection element 25 is configured by, for example, a thermistor. As the thermistor, a PTC thermistor or an NTC thermistor can be appropriately selected. The temperature detection element 25 is not limited to a thermistor, and any element can be appropriately selected as long as the temperature can be detected.

  The temperature detection element 25 is connected to a pair of electric wires W (in FIG. 3, a part on the temperature sensor 24 side is shown and others are omitted) and is led out of the housing member 26. The electric wire W is connected to an external circuit (not shown), and a signal from the temperature detection element 25 is transmitted to the external circuit via the electric wire W. The external circuit is disposed, for example, in a battery ECU (not shown), detects the temperature of the connection member 21 based on a signal from the temperature detection element 25, and detects whether the temperature of the power storage element 12 is maintained within a predetermined range.

As shown in FIG. 4, the accommodating member 26 includes a cylindrical element accommodating portion 27 in which the temperature detecting element 25 is accommodated and the electric wire W is led out, and a flat plate shape that is connected to the element accommodating portion 27 and overlaps the connecting member 21. Terminal portion 28.
The element accommodating portion 27 is open at the proximal end side from which the electric wire W is led out and closed at the distal end side, and accommodates the temperature detecting element 25 connected to the terminal portion of the electric wire W at the inner distal end side.

As shown in FIG. 5, a reduced diameter portion 29 having a reduced diameter is formed on the terminal portion 28 on the element housing portion 27 side. The reduced diameter portion 29 is fitted into the insertion recess 38 of the insulating protector 30.
The terminal portion 28 is formed with an insertion hole 28A through which a bolt shaft portion can be inserted. The insertion hole 28 </ b> A is continuous with the insertion hole 22 of the connection member 21.

The housing member 26 can be formed by pressing a metal plate made of copper, copper alloy, stainless steel (SUS), aluminum, or the like, and performing bending or the like.
The temperature sensor 24 is manufactured by, for example, a method in which an insulating resin (for example, epoxy resin) is poured into the element housing portion 27 and hardened after the temperature detection element 25 connected to the electric wire W is placed in the element housing portion 27. Is done. In addition, the terminal part 28 of the temperature sensor 24 is clamped together with the connecting member 21 between the head portion of the bolt as a fastening member and the electrode terminals 13A and 13B in a state of being overlapped with the connecting member 21.

(Insulation protector 30)
The insulating protector 30 is made of an insulating synthetic resin and is configured by connecting a plurality of connecting units 30 </ b> A in the left-right direction (the direction in which the power storage elements 12 are arranged), and an insulating cover that covers the main body 32 and the main body 32. 47, and a first hinge part 59 for connecting the main body 32 and the insulating cover 47 to each other.
The main body 32 is adjacent to the pair of front and rear connection member holding portion rows 33A and 33B that hold the connection members 21 arranged side by side and the front connection member holding portion row 33A, and extends along the connection member holding portion row 33A. And a connecting portion 32A that integrally connects the pair of front and rear connecting member holding portion rows 33A and 33B.

In each connection member holding portion row 33A, 33B, a plurality of connection member holding portions 34 holding the connection members 21 are arranged side by side.
The connection member holding part 34 has a partition wall 37 that separates the connection member 21 from the outside in an insulated state along the peripheral edge of the connection member 21 placed on the plate-like bottom plate.
An opening 36 through which the upper ends of the electrode terminals 13A and 13B are inserted is formed on the back surface side of the connection member holding portion 34 (see FIG. 4).

As shown in FIG. 5, an insertion recess 38 into which the temperature sensor 24 is inserted is formed in the partition wall 37 so as to cut off the partition wall 37. One or more insertion recesses 38 are formed for each connection member holding portion 34 of the connection member holding portion row 33A, and the temperature sensor 24 can be fitted into the insertion recess 38 at a position where the temperature is to be detected. .
The partition wall 37 is formed with a plurality of pressing pieces 39 that protrude toward the connecting member 21 side and prevent the connecting member 21 from being pulled upward.

A protrusion 40 disposed in the cutout portion 23 of the connection member 21 protrudes inwardly on the partition wall 37 of the connection member holding portion 34 on the end side in the left-right direction of the coupling unit 30A.
Between the protrusion 40 and the notch 23, a clearance is formed to absorb an assembling tolerance between the adjacent connecting units 30A and between the connecting unit 30A and the connecting member 21.

  As shown in FIG. 4, the groove portion 41 is configured such that a part of the temperature sensor 24 and an electric wire W connected to the temperature sensor 24 are routed therein, and a groove bottom 42, a front end of the groove bottom 42, and It has a pair of groove walls 43A and 43B that rise upward from the rear end.

The front groove wall 43 </ b> A is connected to the first hinge portion 59.
A temporary holding portion 45 for locking the second cover portion 51 of the insulating cover 47 in the temporary holding state projects from the upper end portion to the front side on the front groove wall 43A.
The upper side of the rear groove wall 43 </ b> B is integrated with the front end portion of the partition wall 37 of the connection member holding portion 34.

As shown in FIG. 5, the portion of the rear groove wall 43 </ b> B located between the adjacent connection member holding portions 34 (between the partition walls 37 on the front side of the adjacent connection member holding portions 34) is locked. A hole 46 (an example of a “locked portion”) is formed through.
The locked hole 46 has a flat oval shape that is long in the left-right direction.

(Insulation cover 47)
The insulating cover 47 includes a first cover portion 48 that covers the element housing portion 27 and the electric wire W of the temperature sensor 24, a second cover portion 51 that covers the connection member 21, and the first cover portion 48 and the second cover portion 51. And a second hinge part 60 to be connected.
The 1st cover part 48 is plate shape extended in the left-right direction for every connection unit 30A, Comprising: The groove part 41 is covered so that the whole groove part 41 may be covered.
At the front end portion of the first cover portion 48, a regulation locking piece 49 (an example of a “regulation locking portion”) is formed at a predetermined interval in the left-right direction.
As shown in FIG. 7, the restriction locking piece 49 extends in a band shape in a direction perpendicular to the plate surface of the first cover portion 48, has a locking claw at the tip, and can be bent and deformed in the front-rear direction. It has become.

The restriction locking piece 49 is inserted into the locked hole 46 of the main body 32 when the first cover portion 48 is put on the groove portion 41 to be closed, and the locking claw is engaged with the hole edge of the locked hole 46. By stopping, the first cover portion 48 is held in a closed state.
As shown in FIGS. 4 and 5, a restriction wall 50 that presses the temperature sensor 24 from above and restricts the movement of the temperature sensor 24 at a position different from the restriction locking piece 49 at the front end portion of the first cover portion 48. Protrusions are formed. The restriction wall 50 is provided corresponding to each insertion recess 38, and the restriction wall 50 is fitted in each insertion recess 38.

The 2nd cover part 51 is plate shape extended in the left-right direction for every connection unit 30A, Comprising: It covers on the connection member holding | maintenance part row | line | column 33A, and covers the whole connection member holding | maintenance part row | line | column 33A.
By connecting the first cover part 48 and the second cover part 51 via the second hinge part 60, the first cover part 48 is in a closed position that covers the groove part 41, and the second cover part 51 is in the closed position. The connecting member holding part row 33A can be rotated between a closed position and an open position opened without covering the connecting member holding part row 33A.
The 2nd cover part 51 has the to-be-held part 52 latched by the temporary holding part 45 of 43 A of groove walls, and hold | maintains the 2nd cover part 51 in an open state.

As shown in FIG. 7, the held portion 52 is lowered in a step shape from the plate surface portion 51 </ b> A of the second cover portion 51, and the through hole 53 through which the temporary holding portion 45 is inserted is adjacent.
Further, as shown in FIG. 5, the second cover portion 51 is adjacent to a main locking portion 54 that is locked to the main body 32 and holds the second cover portion 51 (insulating cover 47) in a closed state. It has the engaging part 57 and the engagement receiving part 58 which engage with the 2nd cover part 51 of unit 30A in a connected state.

The main locking portion 54 extends in a frame shape at a front end portion of the second cover portion 51 in a direction perpendicular to the plate surface of the second cover portion 51, and a rectangular main locking hole 55 passes therethrough.
The main locking portion 54 is bent in contact with the main locking projection 56 projecting from the rear surface of the partition wall 37 of the connection member holding portion row 33 </ b> A, and the main locking projection 56 is formed at the hole edge of the main locking hole 55. The insulating cover 47 is held in a closed state that covers the entire connecting member holding portion row 33A and the groove portion 41.

The engaging portion 57 is plate-shaped and extends in the left-right direction, and has a locking claw at the tip.
The engagement receiving portion 58 has a rectangular frame shape, and the adjacent second cover portions 51 are connected by the engagement portion 57 being inserted into the engagement receiving portion 58.

The first hinge part 59 is a band-shaped member formed integrally with the main body 32 and the first cover part 48 and is provided with a gap in the left-right direction, and is bent by being formed with a thin thickness. It can be deformed.
The second hinge part 60 is a band-shaped member formed integrally with the first cover part 48 and the second cover part 51 and is provided with a space in the left-right direction, and is formed with a thin thickness. Therefore, it can be bent and deformed.

  The connection member holding portion row 33B can be closed by an insulating cover 61 that is rotatably connected to the main body 32 via a hinge 64, and covers the connection member holding portion row 33B. The cover 61 is held in a closed state by the frame-shaped locking portion 63 being locked to the locking protrusion 62 protruding from the partition wall 37 of the main body 32.

Next, assembly of the wiring module 20 will be described.
(Attaching process of connecting member 21 and temperature sensor 24)
The connecting member 21 is accommodated in the connecting member holding portion 34 of the insulating protector 30, and the reduced diameter portion 29 of the temperature sensor 24 is fitted and attached to the insertion recess 38 of the main body 32. As a result, the terminal portion 28 of the temperature sensor 24 is overlaid on the connection member 21. The electric wire W connected to the temperature sensor 24 is accommodated in the groove 41 and arranged.

(Temporary holding step of the second cover portion 51)
The first cover portion 48 in the open position is rotated to the closed position covering the groove portion 41, and the second cover portion 51 connected by the first cover portion 48 and the second hinge portion 60 closes the first cover portion 48. The second hinge part 60 is bent by turning in the direction opposite to the direction, and the first cover part 48 and the second cover part 51 are opposed to the adjacent positions. Then, the temporary holding portion 45 of the first cover portion 48 is locked to the held portion 52 of the second cover portion 51 in the temporary holding state. Thereby, the rotation of the second cover 51 with respect to the first cover 48 is restricted.

(Fastening process of connecting member 21)
Next, the wiring module 20 in which the second cover portion 51 is temporarily held is placed on the power storage element group 11, and bolts are passed through the through holes 53 of the connection member 21 (and the insertion holes 28A of the terminal portions 28). Fastened to the screw holes of the electrode terminals 13A and 13B.
Then, the second cover portion 51 is released from being locked to the temporary holding portion 45, the second cover portion 51 is closed, and the main locking portion 54 is locked to the main locking projection 56.
Thereby, the electrical storage module 10 is formed.

According to this embodiment, the following operations and effects are achieved.
The wiring module 20 of the present embodiment is a wiring module 20 that is attached to a power storage element group 11 in which a plurality of power storage elements 12 having positive and negative electrode terminals 13 are arranged, and electrically connects adjacent electrode terminals 13. Attached to the main body 32, the connecting member 21, the main body 32 that holds the connecting member 21, the insulating protector 30 that is connected to the main body 32 via the first hinge portion 59 and covers the main body 32, A temperature sensor 24 (detection member) for detecting the state of the storage element 12, and the insulating cover 47 includes a first cover portion 48 that covers at least a part of the temperature sensor 24, and a second cover that covers the connection member 21. And a second hinge part 60 that connects the first cover part 48 and the second cover part 51. The first cover part 48 and the second cover part 51 are connected to each other. One is in a state of covering the temperature sensor 24 or the connecting member 21 and the other of the first cover portion 48 and the second cover portion 51 is openable for.

  According to the present embodiment, the insulating cover 47 can be opened while the first cover portion 48 covers the temperature sensor 24 (detection member). Accordingly, even when the step of attaching the temperature sensor 24 to the main body 32 is performed before the step of fastening the connection member 21, the step of fastening the connection member 21 is performed while covering and protecting the temperature sensor 24 with the insulating cover 47. It becomes possible. Therefore, it is possible to suppress the occurrence of problems in the mounting state of the temperature sensor 24 (detection member) or the like.

One of the first cover part 48 and the second cover part 51 or the main body 32 includes a temporary holding part 45, and the other of the first cover part 48 and the second cover part 51 is a held part 45. To be held and held in an open state.
If it does in this way, it will become possible to improve workability at the time of performing work about connecting member 21 or temperature sensor 24 (detection member).

  Further, the main body 32 includes a locked hole 46 (locked portion), and one of the first cover portion 48 and the second cover portion 51 is covered with the one covering the main body 32. A regulation locking piece 49 (regulation locking part) that is locked to the hole edge of the locking hole 46 is provided.

Further, the first hinge part 59 connects the main body 32 and the first cover part 48.
In this way, after attaching the temperature sensor 24 to the main body 32, the second cover portion 51 can be opened and the connecting member 21 can be fastened.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above embodiment, the first cover portion 48 and the second cover portion 51 are in a state where the first cover portion 48 that is one of the first cover portion 48 and the second cover portion 51 covers the temperature sensor 24. Although the second cover portion 51 as the other side can be opened, the present invention is not limited to this. For example, the second cover 51 is connected to the main body 32 by a hinge portion, and the first cover 48 is in a state in which the second cover that is one of the first cover 48 and the second cover 51 covers the connection member 21. The first cover part that is the other of 48 and the second cover part 51 may be openable.

(2) In the above embodiment, the first cover part 48 or the second cover part 51 covers the temperature sensor 24 as a detection member. However, the detection member is not limited to the temperature sensor 24. For example, a voltage detection terminal for detecting the voltage and detecting the state of the storage element 12 may be attached to the connection member 21 in an overlapping manner.
(3) In the above-described embodiment, the temporary holding portion 45 is provided in the main body 32, but is not limited thereto. For example, the temporary holding portion 45 is opposed when the second cover portion 51 of the first cover portion 48 is rotated. You may make it provide a temporary holding part in the surface of the side to do.
(4) Although the example in which the power storage element is a battery has been shown, the power storage element may be a capacitor or the like.

10: Power storage module 11: Power storage element group 12: Power storage elements 13A, 13B: Electrode terminal 20: Wiring module 21: Connection member 22, 22: Insertion hole 24: Temperature sensor (detection member)
25: Temperature detection element 30: Insulation protector 41: Groove 45: Temporary holding part 46: Locked hole (locked part)
47: Insulating cover 48: First cover portion 49: Restriction locking piece (regulation locking portion)
50: restriction wall 51: second cover portion 52: held portion 53: through hole 54: main locking portion 55: main locking hole 59: first hinge portion 60: second hinge portion

Claims (6)

A wiring module attached to a storage element group in which a plurality of storage elements having positive and negative electrode terminals are arranged,
A connecting member for electrically connecting the adjacent electrode terminals;
An insulating protector comprising a main body for holding the connecting member and an insulating cover connected to the main body via the first hinge portion and covering the main body;
A detection member attached to the main body for detecting the state of the power storage element;
The main body has an insertion recess into which the detection member is inserted,
The insulating cover is
A first cover portion covering at least a part of the detection member;
A second cover portion covering the connection member;
A second hinge portion connecting the first cover portion and the second cover portion;
With one of the first cover part and the second cover part covering the detection member or the connection member, the other of the first cover part and the second cover part can be opened. And
The first cover portion is a wiring module in which a restriction wall that protrudes through the insertion recess and restricts movement of the detection member protrudes. The one of the first cover portion and the second cover portion or the main body includes a temporary holding portion, and the other of the first cover portion and the second cover portion is connected to the temporary holding portion. The wiring module according to claim 1, further comprising a held portion that is locked and held in an open state. The main body includes a locked portion, and the one of the first cover portion and the second cover portion is locked to the locked portion with the one covering the main body. The wiring module according to claim 1, further comprising a regulation locking portion that regulates the opening of the one side. The wiring module according to any one of claims 1 to 3, wherein the first hinge portion connects the main body and the first cover portion. The wiring module according to any one of claims 1 to 4, wherein the detection member is a temperature sensor that detects a temperature of the connection member in order to detect a state of the power storage element. An electrical storage module provided with the said electrical storage element group and the wiring module as described in any one of Claims 1 thru | or 5.

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