JP2008270350A - Device for storing laminated electrical power - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for storing laminated electrical power facilitating radiation of heat to the outside via a metal laminated vessel and making it difficult for heat be transmitted to the adjacent electrical power storage cell. <P>SOLUTION: The device for storing laminated electrical power is provided with a plurality of electrical power storage cells (1) which are accommodated within a metal laminated vessel, formed in rectangular pallelopiped shape, equipped with a positive cell terminal (10) and a negative cell terminal (9) only on a surface, arranged linearly within the surface and connected electrically in series. This laminated electrical power storage device is further provided with a common heat-conducting external plate (4), including a box-like accommodation space for the electrical power storage cell (1), by bending a sheet of blank having a plurality of bending portions along these bending portions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stacked power storage device that is housed in a metal laminate container, has a rectangular parallelepiped shape, and has a plurality of power storage cells connected in series on one surface and having a positive electrode terminal and a negative electrode terminal.

Examples of the power storage device housed in a metal laminate container and having a rectangular parallelepiped shape and having a positive cell terminal and a negative cell terminal on one surface include an electric double layer capacitor, a lithium ion battery, and a lithium ion capacitor.
An electric double layer capacitor has polarizable electrodes (positive electrode and negative electrode) facing each other across a separator, and the capacitance of the electric double layer formed in the electrolyte solution at the interface between the surface of the polarizable electrode and the electrolyte solution Is used.
In addition, lithium ion batteries are characterized in that lithium can be stably charged and stored in a carbon negative electrode, and oxides such as cobalt, nickel, and manganese are used for the positive electrode.
In addition, a lithium ion capacitor has been developed as a hybrid type of an electric double layer capacitor and a lithium ion battery, and has a positive electrode of the electric double layer capacitor and a negative electrode of the lithium ion battery, and has a higher voltage than the electric double layer capacitor. On the other hand, the disadvantage is that the voltage cannot be reduced to 0V.
In any case, since the metal laminate container is housed in the metal laminate container, it can be configured compactly at a low cost. However, since the metal laminate container is easily damaged, it must be housed in a strong container for protection.
Moreover, since the voltage is about 3 V, which is lower than 400 V of an aluminum electrolytic capacitor, it is necessary to increase the voltage by connecting in series.

A technique called stacking is used to increase the voltage of the power storage device. As a method of stacking power storage cells that are housed in a metal laminate container and have a rectangular parallelepiped shape and having a positive cell terminal and a negative cell terminal on one side, it is common to stack the rectangular parallelepiped in the direction of decreasing thickness It is.
However, the power storage device generates heat during charging / discharging, and unless the heat is taken out and removed, the temperature of the power storage device rises and there is a risk that deterioration will accelerate. In general, a power storage device is known to have a 7 ° C. half law or a 10 ° C. half law in which the lifetime is halved as the temperature rises to 7 ° C. or 10 ° C.

For this reason, the laminated power storage device is devised to dissipate heat. For example, sandwiching a good thermal conductor, stacking power storage devices in the direction of thin rectangular parallelepiped to form a stacked power storage device, and radiating heat from the side using a heat dissipation plate, cooling the power storage device The structure which does is disclosed (for example, refer patent document 1).
Further, as another device for dissipating heat, a planar alignment structure of power storage cells in which a plurality of power storage cells are arranged in a plane and a common reinforcing member is applied to the front and back is disclosed (for example, see Patent Document 2). ).

Japanese Patent Laid-Open No. 2005-57007 JP 2005-288138 A

However, in the power storage device disclosed in Patent Document 1, it is necessary to transfer the heat generated in the power storage device to the side surface, and the distance between the central portion and the side surface of the power storage device is long. Because it is difficult to sufficiently cool the center of the device and the center of the power storage device is kept at a high temperature, the stacked power storage device has a deterioration rate compared with that of the power storage device alone (one cell). Thus, there is a problem that the deterioration rate is remarkably accelerated.
In addition, since the metal laminate container is easily damaged, it must be stored in a strong container, and even if the heat is collected on the side, a mechanism to release it to the outside of the container is necessary, resulting in high cost and sufficient cooling. Is difficult to do.

Further, in the power storage cell disclosed in Patent Document 2, the side surface, bottom surface, and top surface of the power storage cell are merely reinforced in a flat shape, and the metal laminate container is sufficiently protected. There is a problem that you can't.
Further, there is a problem that heat of adjacent cells is transmitted through the reinforcing member, and the adjacent cells are heated to accelerate deterioration.
In addition, when configured using a lattice frame, there are problems that the number of parts increases and the structure is complicated and expensive.

  An object of the present invention is to provide a stacked type power storage device that facilitates heat dissipation to the outside through a metal laminate container and hardly transfers heat to an adjacent power storage cell.

  The laminated power storage device according to the present invention has a rectangular parallelepiped shape accommodated in a metal laminate container, and has a positive electrode terminal and a negative electrode terminal on one surface, and is arranged in a straight line in a plane. In a stacked power storage device comprising a plurality of power storage cells connected in series, a saddle-like shape that accommodates the power storage cells by bending a blank having a plurality of bent portions along the bent portions The common heat-transfer exterior board in which the accommodation space was formed is provided.

  The effect of the laminated power storage device according to the present invention is that the six surfaces of the metal laminate container are protected by the common heat transfer exterior plate, and there is no fear of the metal laminate container being damaged from the outside. It is not necessary to use. Therefore, it is possible to directly cool the common heat-transfer exterior plate by air cooling or water cooling to dissipate heat, and to construct a stacked power storage device that can be easily cooled.

Embodiment 1 FIG.
Although the electric double layer capacitor will be described as an example of the multilayer power storage device according to the first embodiment of the present invention, the present invention is not limited to this and can be similarly applied to a lithium ion battery or a lithium ion capacitor.
In the electric double layer capacitor according to Embodiment 1 of the present invention, three power storage cells 1 are arranged in series, but the number of power storage cells 1 in series is not limited to this.

FIG. 1 is a front view of a power storage cell according to Embodiment 1 of the present invention.
The power storage cell 1 according to Embodiment 1 of the present invention includes a cover metal after a plate-like cell formed by sandwiching a separator (not shown) between a positive electrode (not shown) and a negative electrode (not shown) on a base metal laminate film. It is sealed with a laminate film and accommodated in a metal laminate container. Further, the negative electrode cell terminal 9 and the positive electrode cell terminal 10 are drawn from the upper surface of the power storage cell 1 through the base metal laminate film and the cover metal laminate film from the positive electrode and the negative electrode. A gas release valve 14 is provided on the upper surface of the power storage cell 1 to release the gas generated inside the power storage cell 1 to the outside. This gas is released to prevent the laminate container from bursting.
In the following description, the side surface covered with the base metal laminate film in the plate-like cell is referred to as the sub surface, and the side surface covered with the cover metal laminate film is referred to as the main surface.

  In the stacked power storage device according to the first embodiment of the present invention, two types of power storage cells 1L and 1R are used as the power storage cell 1. The difference between the power storage cells 1L and 1R is that the positional relationship between the negative cell terminal 9 and the positive cell terminal 10 is linear when the power storage cell 1 arranged on the panel with the sub surface in contact with the panel is viewed from above. It is a symmetrical relationship.

FIG. 2 is a top view and a plan view of the stacked power storage device according to the first embodiment of the present invention.
Each power storage cell 1 is surrounded by a common heat transfer exterior plate 4, the sub surface faces the common heat transfer exterior plate back surface portion 5, and the main surface faces the common heat transfer exterior plate front portion 6. . On the electrically insulating plate 11, the negative electrode terminal 9 and the positive electrode terminal 10 of the adjacent power storage cell 1 are connected by spot welding, and the negative current terminal 12 and the positive current terminal are connected to both ends of the stacked power storage device. 13 is arranged and can be electrically connected to other stacked power storage devices.

  A protection circuit 15 such as a Zener diode or a resistor is provided between the negative electrode terminal 9 and the positive cell terminal 10 of each power storage cell 1 to prevent a high voltage from being applied to the power storage cell 1. It is configured as follows.

FIG. 3 is a plan view of a blank of the common heat transfer exterior plate according to the first embodiment of the present invention. The blank mentioned here is a flat plate having a high thermal conductivity such as a metal plate.
The common heat transfer exterior plate 4 is obtained by bending a blank obtained by punching a nickel-plated iron plate having a thickness of 0.1 mm into a three-dimensional shape.
In the blank, a bending groove is formed at a portion to be bent by groove processing performed simultaneously with the punching processing. In addition, the dotted line drawn on the blank of FIG. 3 shows the bending groove | channel formed in the surface, and the dashed-dotted line formed in the back surface.
The blank includes a common heat-transfer exterior plate front portion 6, a common heat-transfer exterior plate side portion 7, a common heat-transfer exterior plate rear surface portion 5, a common heat-transfer exterior plate upper-surface portion 8, and a common heat-transfer partition, which are partitioned by bending grooves. There are an exterior plate bottom surface portion 16, a common heat transfer exterior plate side surface portion 17, and a common heat transfer exterior plate bottom side surface portion 18.

The three common heat transfer exterior plate back surface portions 5 are arranged in a straight line with the common heat transfer exterior plate side portions 7 connected to two opposing sides.
The three common heat transfer exterior plate front portions 6 are connected with the common heat transfer exterior plate back surface portion 5 and the common heat transfer exterior plate bottom surface portion 16 interposed therebetween. The three common heat transfer exterior plate front surface portions 6 are connected to the common heat transfer exterior plate upper surface portion 8 on the side facing the side continuous with the common heat transfer exterior plate bottom surface portion 16. Moreover, the common heat-transfer exterior board side surface part 17 is connecting the three common heat-transfer exterior board front-surface parts 6 with the remaining 2 sides.
In the common heat transfer exterior plate side surface portion 17, the common heat transfer exterior plate bottom side surface portion 18 is connected to the side where the ends of the bent grooves where the common heat transfer exterior plate front surface portion 6 and the common heat transfer exterior plate bottom surface portion 16 are continuous are connected. .
In the following description, the surface of the common heat-transfer exterior plate front portion 6 shown in FIG. 2 will be referred to as the upper surface, and the rear surface of the upper surface will be referred to as the front surface.

  Then, by bending the blank, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate back portion 5, the common heat transfer exterior plate upper surface portion 8, the common heat transfer exterior plate bottom surface portion 16, the common heat transfer exterior plate The plate side surface portion 17 and the common heat transfer exterior plate bottom side surface portion 18 form an exterior that surrounds all six surfaces of the power storage cell 1 to protect the power storage cell 1 and transfer heat generated in the power storage cell 1. Heat to discharge outside.

FIG. 4 is a plan view for explaining a direction in which the blank is bent according to the first embodiment of the present invention.
In the following description of folding the blank, folding the corresponding section to the front side with respect to the paper surface is referred to as front folding, and folding to the depth side with respect to the paper surface is referred to as over-folding.
The common heat transfer exterior plate bottom side surface portion 18 is folded forward along the folding grooves a1, a2, a5, and a6. Further, the common heat transfer exterior plate bottom side surface portion 18 is folded away along the folding grooves a3 and a4.
Next, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate upper surface portion 8, and the common heat transfer exterior plate side surface portion 17 are folded forward along the outer peripheral bending groove of the common heat transfer exterior plate front portion 6. To do. Further, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate upper surface portion 8, and the common heat transfer exterior plate side surface portion 17 are folded away along the outer circumferential bending groove of the central common heat transfer exterior plate front portion 6. .
Next, the common heat transfer exterior plate bottom surface portion 16 is folded forward along the bending grooves b1 and b3. Moreover, the common heat-transfer exterior board bottom face part 16 is folded away along the bending groove b2.
Finally, the common heat transfer exterior plate side portion 7 is folded forward along the folding grooves c1, c2, c5, and c6. Further, the common heat transfer exterior plate side portion 7 is folded away along the folding grooves c3 and c4.
Thus, the storage space which accommodates the power storage cell 1 is formed by bending the blank. And since the three-dimensional structure of the common heat-transfer exterior board 4 is a simple structure like a metal box, it is easy to mechanize a bending process.

FIG. 5 is a top view and a plan view of a common heat-transfer exterior plate that is three-dimensionally processed by bending a blank.
By bending the blank as described above, three accommodation spaces that can accommodate the three power storage cells 1 are formed. This accommodation space is separated by an adjacent accommodation space, two common heat transfer exterior plate side portions 17 and a common heat transfer exterior plate side portion 7 sandwiched therebetween.
Further, the power storage cell 1 accommodated in the accommodation space is sandwiched between the common heat transfer exterior plate front portion 6 and the common heat transfer exterior plate back portion 5 which face each other. However, next to the common heat transfer exterior plate front portion 6 in the central accommodation space, the common heat transfer exterior plate back portions 5 in the accommodation spaces on both sides are arranged side by side. On the contrary, the common heat-transfer exterior board front part 6 of the accommodation space of both sides is located side by side next to the common heat-transfer exterior board back part 5 of the center accommodation space.
And the back surface of the common heat-transfer exterior board front part 6 appears inside the accommodation space of both sides, and the front face of the common heat-transfer exterior board front part 6 appears inside the central accommodation space.

  The side surface of the power storage cell 1 accommodated in this accommodation space is composed of the side surface of the power storage cell 1 accommodated in the adjacent accommodation space, the two common heat transfer exterior plate side surfaces 17 and the common heat transfer sandwiched between them. Since it is isolated by the exterior plate side portion 7, the heat generated in the power storage cell 1 is not easily transmitted to the adjacent power storage cell 1 by conduction or convection of the surrounding atmosphere.

6A and 6B are a top view and a plan view showing a state in which the power storage cell is inserted into the accommodation space formed in the common heat transfer exterior plate according to Embodiment 1 of the present invention.
When the power storage cell 1 is inserted into the accommodation space, the auxiliary surface is inserted into the common heat transfer exterior plate back surface portion 5 and the main surface is inserted into the common heat transfer exterior plate front surface portion 6.
That is, the power storage cell 1R to be inserted into the storage space located in the center is centered on the direction in which the power storage cell 1 is inserted into the storage space relative to the power storage cell 1L inserted into the storage space located on both sides. Position it in a line-symmetric position and insert it into the receiving space.
After the power storage cell 1 is inserted into the housing space, the upper surface portion 8 of the common heat transfer outer plate is bent to fix the power storage cell 1 in the housing space.
In the above description, the gas release valve 14 is arranged so that it can be seen. However, if it is inconvenient to directly release the gas to the outside, the upper surface of the common heat transfer exterior plate so as to cover the gas release valve 14 The power storage cell 1 may be fixed by elongating 8 and bending it.

FIG. 7 is a top view and a plan view showing connection of current terminals of the stacked power storage device according to the first embodiment of the present invention. The electric insulating plate 11 is omitted for easy viewing.
By simply bending the negative electrode cell terminal 9 and the positive electrode cell terminal 10 of each power storage cell 1 and spot welding with the adjacent negative electrode cell terminal 9 or positive electrode cell terminal 10, it can be easily and in series connected in the shortest time. Simple configuration.
Further, the power storage cell 1R located in the center is in a line-symmetric relationship with the power storage cell 1L located on both sides as a center line in the direction in which the power storage cell 1 is inserted into the accommodation space. A configuration in which the terminals 9 and the positive electrode cell terminals 10 are alternately arranged can be selected.
If only one of the power storage cell 1R and the power storage cell 1L is used as the power storage cell 1, the negative cell terminal 9 is connected to the negative cell terminal 9, and the positive cell terminal is connected to the positive cell terminal 10. 10 will be adjacent to each other, making series connection difficult.

In the laminated power storage device according to the first embodiment of the present invention, the six surfaces of the metal laminate container are protected by the common heat transfer exterior plate 4, and there is no fear of the metal laminate container being damaged from the outside. There is no need to use a separate outer container. Therefore, the common heat-transfer exterior plate 4 can be directly cooled by air cooling or water cooling to dissipate heat, and a laminated power storage device that is easy to cool is configured.
By sufficiently cooling in this way, the temperature distribution in the power storage cell 1 becomes uniform and the temperature rise is suppressed, so that local deterioration of the power storage cell 1 can be prevented and the life can be extended.

  In particular, since the secondary surface of the power storage cell 1 faces the common heat transfer exterior plate back surface portion 5 and the main surface faces the common heat transfer exterior plate front surface portion 6 and is not shared with the adjacent power storage cell 1, The heat of the power storage cell 1 is difficult to be transmitted to the adjacent power storage cell 1 through the thin common heat transfer exterior plate 4, and it is possible to prevent deterioration due to transmission of heat generation to the adjacent cell. it can.

  Moreover, since all the subsurfaces and main surfaces of the power storage cell 1 face either the common heat transfer exterior plate front surface portion 6 or the common heat transfer exterior plate back surface portion 5, the power storage cell 1 is configured to be wrapped. The heat generation of the power storage cell 1 can be absorbed from the common heat transfer exterior plate front portion 6 or the common heat transfer exterior plate rear portion 5 and the common heat transfer exterior plate front portion 6 or the common heat transfer exterior plate rear portion. 5 can be distributed in the plane of 5 and discharged to the outside. For example. For example, the power storage cell 1 is wrapped like a diaper so that pee does not leak.

Further, since the power storage cell 1 is configured alternately as the power storage cell 1R and the power storage cell 1L, the distance between the adjacent current terminals is secured, and the connection of the current terminals on the electrical insulating plate 11 is easy. become.
In Embodiment 1, a blank obtained by punching a 0.1 mm thick nickel-plated iron plate is used. However, the blank does not necessarily have to be formed by one piece, and is connected by welding or the like. They may be combined, or may have a single shape with substantially ensured thermal conductivity.

Embodiment 2. FIG.
FIG. 8 is a top view of the stacked power storage device according to the second embodiment of the present invention. FIG. 9 is a schematic diagram of a stacked power storage device according to Embodiment 2 of the present invention.
The stacked power storage device according to the second embodiment of the present invention is an array of two stacked power storage devices according to the first embodiment. The stacked power storage device in the second row is 180 with the same stacked power storage device as the stacked power storage device in the first column about the central axis of the power storage cell 1R at the center of the stacked power storage device. And the central axis is moved in the thickness direction by the thickness of the power storage cell 1, and the common heat transfer outer plate 4 of the two stacked power storage devices is in contact.

When arranged in this manner, the positive electrode cell terminal 10 of the right power storage cell 1L of the stacked power storage device in the first row and the negative electrode terminal 9 of the right power storage cell 1L of the stacked power storage device in the second row are arranged. Get closer.
Therefore, the positive electrode cell terminal 10 of the right power storage cell 1L of the stacked power storage device in the first row and the negative electrode terminal 9 of the right power storage cell 1L of the stacked power storage device in the second row are spot-welded. Can be connected. By arranging and connecting in this way, a 6-cell module in which six power storage cells 1 are connected in series is configured.

  In the stacked power storage device according to the second embodiment of the present invention, two stacked power storages in which three power storage cells 1 are accommodated in the three accommodating spaces of the common heat transfer exterior plate 4 in a straight line in a plane. Since the devices are arranged so that the common heat transfer exterior plate 4 faces, the positive electrode cell terminal 10 of the first row of stacked power storage devices and the negative electrode cell terminal 9 of the second row of stacked power storage devices are adjacent to each other. And these connections become easy.

Embodiment 3 FIG.
FIG. 10 is a schematic diagram of a stacked power storage device according to Embodiment 3 of the present invention.
The stacked power storage device according to the third embodiment of the present invention is a stack of two stacked power storage devices according to the second embodiment. In other words, when the negative electrode terminal 9 of the left power storage cell 1L of the stacked power storage device in the first row of the first six-cell module is positioned on the left side of the positive cell terminal 10, the second 6 The power storage cell 1L on the left side of the stacked power storage device in the first row of the cell modules is arranged so that the negative electrode cell terminal 9 is located on the left side of the positive electrode cell terminal 10. Then, the left side of the stacked power storage device in the first row of the second 6-cell module is connected to the positive cell terminal 10 of the left power storage cell 1L of the stacked power storage device in the second row of the first 6-cell module. The negative electrode terminal 9 of the power storage cell 1L approaches.
Therefore, a 12-cell module in which twelve power storage cells 1 are connected in series is configured by connecting the positive electrode cell terminal 10 and the negative electrode cell terminal 9 which are close to each other by spot welding.

The stacked power storage device according to the third embodiment of the present invention has four stacked power storages in which three power storage cells 1 are linearly accommodated in the three accommodating spaces of the common heat transfer exterior plate 4 in a plane. Since the devices are arranged so that the common heat transfer exterior plate 4 faces, the positive electrode cell terminal 10 of the second row stacked power storage device and the negative electrode cell terminal 9 of the third row stacked power storage device are adjacent to each other. These connections are easy.
In addition, the number of series increases and the total voltage extracted to the outside can be increased.

Embodiment 4 FIG.
FIG. 11 is a schematic diagram of a stacked power storage device according to Embodiment 4 of the present invention.
The laminated power storage device according to the fourth embodiment of the present invention is composed of four laminated power storage devices in which three power storage cells 1 are accommodated in three accommodation spaces of the common heat transfer exterior plate 4. Of the four stacked power storage devices, two first type stacked power storage devices have the power storage cells 1 arranged in the order of 1R, 1L, and 1R, and the other two second type stacked power storage devices. In the type power storage device, the power storage cells 1 are arranged in the order of 1L, 1R, and 1L.

The four stacked power storage devices are arranged as follows. That is, in the first column, the first type stacked power storage device is arranged such that the negative electrode cell terminal 9 of the power storage cell 1R on the left side of the first type stacked power storage device is located on the left side of the positive electrode cell terminal 10. Deploy.
Next, in the second row, the second type stacked power storage device is arranged such that the negative electrode cell terminal 9 of the right power storage cell 1L on the right side of the second type stacked power storage device is positioned on the right side of the positive electrode cell terminal 10. And the common heat transfer exterior plate front portion 6 and the common heat transfer exterior plate back portion 5 are in contact with each other so that the first row of first type stacked power storage devices and the second row of second type Line up stacked power storage devices.

Next, in the third row, the first type stacked power storage device is arranged such that the negative electrode cell terminal 9 of the power storage cell 1R on the left side of the first type stacked power storage device is located on the left side of the positive electrode cell terminal 10. The second row of the second type stacked power storage devices and the third row of the first type of lamination so that the common heat transfer outer plate front portion 6 and the common heat transfer outer plate rear portion 5 are in contact with each other. Side by side power storage device.
Next, in the fourth row, the second type stacked power storage device is arranged such that the negative electrode cell terminal 9 of the power storage cell 1L on the right side of the second type stacked power storage device is located on the right side of the positive electrode cell terminal 10. And the common heat transfer exterior plate front portion 6 and the common heat transfer exterior plate back portion 5 are in contact with each other so that the third row of the first type stacked power storage devices and the fourth row of the second type Line up stacked power storage devices.

  The stacked power storage device according to the fourth embodiment of the present invention has four stacked power storages in which three power storage cells 1 are accommodated linearly in the three accommodating spaces of the common heat transfer exterior plate 4 in a plane. Since the devices are arranged so that the common heat transfer exterior plate 4 faces, the positive electrode cell terminal 10 of one stacked power storage device is adjacent to the negative electrode cell terminal 9 of the other stacked power storage device. Easy connection.

  Moreover, since the direction of the common heat transfer exterior plate 4 is all in the same direction, when the surface pressure is applied to the common heat transfer exterior plate 4, the surface pressure can be applied uniformly. In particular, when an electrode that expands greatly during charging is used, it is not sufficient to sandwich the common heat transfer exterior plate 4, and the surface pressure of the power storage cell is reduced between the sub surface and the main surface. Therefore, it is useful to align the direction of the common heat transfer outer plate 4.

Embodiment 5. FIG.
FIG. 12 is a plan view of a blank for a common heat-transfer exterior plate of a stacked power storage device according to Embodiment 5 of the present invention.
The blank includes a common heat-transfer exterior plate front portion 6, a common heat-transfer exterior plate side portion 7, a common heat-transfer exterior plate rear surface portion 5, a common heat-transfer exterior plate upper-surface portion 8, and a common heat-transfer partition, which are partitioned by bending grooves. There are an exterior plate bottom surface portion 16, a common heat transfer exterior plate side surface portion 17, and a common heat transfer exterior plate bottom side surface portion 18.

The six common heat transfer exterior plate back surface portions 5 are arranged in a straight line and divided into two groups of three. And as for the three common heat-transfer exterior board back surface parts 5 of each group, the common heat-transfer exterior board side part 7 continues in two opposite sides.
The six common heat transfer exterior plate front surface portions 6 are connected via the common heat transfer exterior plate back surface portion 5 and the common heat transfer exterior plate bottom surface portion 16. In addition, the front surface portion 6 of the six common heat transfer exterior plates has the common heat transfer exterior plate upper surface portion 8 connected to the side facing the side continuous to the common heat transfer exterior plate bottom surface portion 16. Moreover, the common heat-transfer exterior board side surface part 17 is continued to the remaining 2 sides of the six common heat-transfer exterior board front face parts 6.
In the common heat transfer exterior plate side surface portion 17, the common heat transfer exterior plate bottom side surface portion 18 is connected to the side where the ends of the bent grooves where the common heat transfer exterior plate front surface portion 6 and the common heat transfer exterior plate bottom surface portion 16 are continuous are connected. .

FIG. 13 is a plan view for explaining the bending of the blank according to the fifth embodiment of the present invention.
In the following description of folding the blank, folding the corresponding section to the front side with respect to the paper surface is referred to as front folding, and folding to the depth side with respect to the paper surface is referred to as over-folding.
The common heat transfer exterior plate bottom side surface portion 18 is folded forward along the folding grooves a1, a2, a5, a6, a7, a8, a11, and a12. Further, the common heat transfer exterior plate bottom side surface portion 18 is folded away along the folding grooves a3, a4, a9, and a10.
Next, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate upper surface portion 8, and the common heat transfer exterior plate side surface portion 17 along the bending groove on the outer periphery of the common heat transfer exterior plate front portion 6 on both sides of each group. Fold it forward. In addition, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate upper surface portion 8, and the common heat transfer exterior plate side surface portion 17 are arranged along the outer peripheral bending groove of the common heat transfer exterior plate front portion 6 of each group. Fold it over.
Next, the common heat transfer exterior plate bottom surface portion 16 is folded forward along the bending grooves b1, b3, b4, and b6. Further, the common heat transfer exterior plate bottom surface portion 16 is folded away along the folding grooves b2 and b5.
Next, the common heat transfer exterior plate side portion 7 is folded forward along the folding grooves c1, c2, c5, c6, c7, c8, c11, and c12. Further, the common heat transfer exterior plate side portion 7 is folded away along the folding grooves c3, c4, c9, and c10.
Finally, the common heat transfer exterior plate side portion 7 is folded forward along the folding groove d1.
Thus, the storage space which accommodates the power storage cell 1 is formed by bending the blank. And since the three-dimensional structure of the common heat-transfer exterior board 4 is a simple structure like a metal box, it is easy to mechanize a bending process.

FIG. 14 is a top view of the stacked power storage device according to the fifth embodiment of the present invention. FIG. 15 is a schematic diagram of a stacked power storage device according to Embodiment 5 of the present invention.
When the power storage cell 1 is accommodated in the order of the power storage cell 1R and the power storage cell 1L in the common heat transfer exterior plate 4 having the six accommodation spaces by bending the blank as described above, the third power storage cell Since the 1R negative cell terminal 9 and the positive cell terminal 10 are close to each other, if the negative cell terminal 9 and the positive cell terminal are bent and spot-welded, a 6-cell module in which six power storage cells 1 are connected in series can be configured. .

  Thus, by adding one common heat transfer exterior plate side part 7 to the common heat transfer exterior plate 4, the six power storage cells 1 arranged in parallel by three are connected to one common heat transfer exterior plate 4. Can be accommodated.

Embodiment 6 FIG.
FIG. 16: is a top view of the blank of the common heat-transfer exterior board of the laminated | stacked power storage device by Embodiment 6 which concerns on this invention.
The blank includes a common heat-transfer exterior plate front portion 6, a common heat-transfer exterior plate side portion 7, a common heat-transfer exterior plate rear surface portion 5, a common heat-transfer exterior plate upper-surface portion 8, and a common heat-transfer partition, which are partitioned by bending grooves. There are an exterior plate bottom surface portion 16, a common heat transfer exterior plate side surface portion 17, a common heat transfer exterior plate bottom side surface portion 18, and a common heat transfer exterior plate partition wall portion 19.

The three common heat transfer exterior plate back portions 5 are arranged in a straight line, and each common heat transfer exterior plate back portion 5 is formed by connecting the common heat transfer exterior plate side portions 7 to two sides orthogonal to the arranged direction. Yes. Further, the common heat transfer exterior plate side portion 7 sandwiched between the common heat transfer exterior plate back portions 5 is connected to the common heat transfer exterior plate partition wall portion 19.
The three common heat transfer exterior plate front portions 6 are connected with the common heat transfer exterior plate back surface portion 5 and the common heat transfer exterior plate bottom surface portion 16 interposed therebetween. The three common heat transfer exterior plate front surface portions 6 are connected to the common heat transfer exterior plate upper surface portion 8 on the side facing the side continuous with the common heat transfer exterior plate bottom surface portion 16. Moreover, the common heat-transfer exterior board side surface part 17 is connecting the three common heat-transfer exterior board front-surface parts 6 with the remaining 2 sides.
In the common heat transfer exterior plate side surface portion 17, the common heat transfer exterior plate bottom side surface portion 18 is connected to the side where the ends of the bent grooves where the common heat transfer exterior plate front surface portion 6 and the common heat transfer exterior plate bottom surface portion 16 are continuous are connected. .

FIG. 17 is a plan view for explaining the bending of the blank according to the sixth embodiment of the present invention.
In the following description of folding the blank, folding the corresponding section to the front side with respect to the paper surface is referred to as front folding, and folding to the depth side with respect to the paper surface is referred to as over-folding.
The common heat-transfer exterior plate bottom side surface portion 18 is folded forward along the folding grooves a1, a2, a3, a4, a5, and a6.
Next, the common heat transfer exterior plate front portion 6, the common heat transfer exterior plate upper surface portion 8, and the common heat transfer exterior plate side surface portion 17 are folded forward along the outer circumferential bending groove of each common heat transfer exterior plate front portion 6. .
Next, the common heat transfer exterior plate bottom surface portion 16 is folded forward along the bending grooves b1, b2, and b3.
Next, the common heat transfer exterior plate side portion 7 is folded forward along the folding grooves c1, c2, c3, c4, c5, and c6.
Finally, the common heat transfer exterior plate partition wall 19 is folded away along the folding grooves d1, d2, d3, and d4.
Thus, the storage space which accommodates the power storage cell 1 is formed by bending the blank. And since the three-dimensional structure of the common heat-transfer exterior board 4 is a simple structure like a metal box, it is easy to mechanize a bending process.

FIG. 18 is a top view and a plan view of a stacked power storage device according to the sixth embodiment of the present invention.
When the power storage cell 1 is inserted into the accommodation space, the auxiliary surface is inserted into the common heat transfer exterior plate back surface portion 5 and the main surface is inserted into the common heat transfer exterior plate front surface portion 6. In addition, since the common heat-transfer exterior plate back part 5 and the common heat-transfer exterior plate front part 6 are arranged side by side, the common heat-transfer exterior plate 4 according to Embodiment 6 uses only the power storage cell 1L. Yes.
Thus, since it can comprise only one kind of electric power storage cell, composition can be simplified.
Moreover, since the distance between the adjacent power storage cells becomes long, the compactness is lacking, but the heat conduction can be reduced.

Embodiment 7 FIG.
FIG. 19 is a top view of the stacked power storage device according to the seventh embodiment of the present invention. FIG. 20 is a schematic diagram of a stacked power storage device according to the seventh embodiment of the present invention.
The stacked power storage device according to the seventh embodiment of the present invention is configured by connecting two stacked power storage devices according to the sixth embodiment to form a 6-cell module. The negative current terminal 12 and the positive current Since the terminals 13 are arranged adjacent to each other, it is easy to connect the external current terminals.

  In the first to seventh embodiments described above, the power storage cell 1 faces the six surfaces of the common heat transfer exterior plate 4, but omits the common heat transfer exterior plate upper surface portion 8 and has five surfaces. The electrical insulating plate 11 can be fixed to the upper surface of the power storage cell 1.

  In the first to seventh embodiments described above, a blank for punching one metal plate is prepared. However, it may be partially welded or partially cut off. If it is the structure of a sheet | seat, since the heat_generation | fever of the electric power storage cell 1 is received and heat-transferred outside and the electric power storage cell 1 can be protected from external force, the same effect will come out.

  Further, in the above-described Embodiments 2 to 4, the case where a plurality of stacked power storage devices are electrically connected in series has been described, but they may be parallel.

It is a front view of the electric power storage cell by Embodiment 1 which concerns on this invention. 1 is a top view and a plan view of a stacked power storage device according to a first embodiment of the present invention. It is a top view of the blank of the common heat-transfer exterior board by Embodiment 1 which concerns on this invention. It is a top view for demonstrating the direction which bends the blank by Embodiment 1 which concerns on this invention. It is the upper side figure and top view of a common heat-transfer exterior board which gave the blank process and processed three-dimensionally. It is the top view and top view which show a mode that an electric power storage cell is inserted in the accommodation space formed in the common heat-transfer exterior board by Embodiment 1 which concerns on this invention. It is the top view and top view which show the connection of the current terminal of the laminated | stacked power storage device by Embodiment 1 which concerns on this invention. It is a top view of the laminated | stacked power storage device by Embodiment 2 which concerns on this invention. It is a schematic diagram of the laminated power storage device according to the second embodiment of the present invention. It is a schematic diagram of the laminated power storage device according to Embodiment 3 according to the present invention. It is a schematic diagram of the stacked power storage device according to the fourth embodiment of the present invention. It is a top view of the blank of the common heat-transfer exterior board by Embodiment 5 which concerns on this invention. It is a top view for demonstrating bending of the blank by Embodiment 5 which concerns on this invention. It is a top view of the laminated power storage device according to the fifth embodiment of the present invention. It is a schematic diagram of the laminated power storage device according to the fifth embodiment of the present invention. It is a top view of the blank of the common heat-transfer exterior board by Embodiment 6 which concerns on this invention. It is a top view for demonstrating bending of the blank by Embodiment 6 which concerns on this invention. It is the top view and top view of a lamination type electric power storage device by Embodiment 6 concerning this invention. It is a top view of the laminated power storage device according to the seventh embodiment of the present invention. It is a schematic diagram of the laminated power storage device according to the seventh embodiment of the present invention.

Explanation of symbols

  1, 1L, 1R Power storage cell, 4 Common heat transfer exterior plate, 5 Common heat transfer exterior plate back, 6 Common heat transfer exterior plate front, 7 Common heat transfer exterior plate side, 8 Common heat transfer exterior plate top 9, negative electrode cell terminal, 10 positive cell terminal, 11 electrical insulating plate, 12 negative current terminal, 13 positive current terminal, 14 gas release valve, 15 protection circuit, 16 common heat transfer exterior plate bottom, 17 common heat transfer exterior Plate side surface part, 18 Common heat transfer exterior plate bottom side surface part, 19 Common heat transfer exterior plate partition part.

Claims (6)

A plurality of power storages in which the shape housed in the metal laminate container is a rectangular parallelepiped, has a positive electrode cell terminal and a negative electrode cell terminal on one surface, and is arranged linearly in a plane and electrically connected in series In a stacked power storage device comprising a cell,
A laminated type comprising a common heat transfer exterior plate in which a blank containing space for accommodating the power storage cell is formed by bending a blank having a plurality of bent portions along the bent portion. Power storage device. The power storage cell has a top surface from which the positive cell terminal and the negative cell terminal are drawn, and a bottom surface facing the top surface,
The common heat transfer exterior plate includes a bottom surface portion that faces the bottom surface, and an upper surface portion that is not in electrical contact with the positive electrode cell terminal and the negative electrode cell terminal and that is in contact with a part of the upper surface and fixes the power storage cell. The stacked power storage device according to claim 1, further comprising: The power storage cell has a main surface and a sub surface orthogonal to the bottom surface and facing each other,
The common heat transfer exterior plate faces the sub-surface of the power storage cell accommodated in the accommodation space and is arranged in one direction with a side portion interposed therebetween, and in parallel with the arrangement of the back surface portion. And having a front portion connected to the back portion with the bottom portion interposed therebetween,
3. The stacked type according to claim 2, wherein the power storage cell is accommodated in the accommodation space such that a main surface of the power storage cell alternately faces the upper surface and the second surface of the front portion. Power storage device.   The positional relationship between the positive cell terminal and the negative cell terminal of the power storage cell with the main surface facing the upper surface is the positive cell terminal and the negative cell terminal of the power storage cell with the main surface facing the front surface. The stacked power storage device according to claim 3, wherein the stacked power storage device is in a line-symmetric relationship with the positional relationship between An electrical insulating board having a through hole facing the upper surface and through which the positive cell terminal or the negative cell terminal passes,
5. The positive electrode cell terminal and the negative electrode cell terminal are bent and connected to the positive electrode cell terminal or the negative electrode cell terminal of the adjacent power storage cell. 6. Stacked power storage device.   The plurality of stacked power storage devices according to any one of claims 1 to 5 are confronted with a front portion or a back portion of a heat-transfer exterior plate adjacent to a front portion or a back portion of the heat-transfer exterior plate. And an electrical connection in series or in parallel.

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