WO2020188996A1 - Battery assembly - Google Patents

Abstract

The positions of a plurality of first venting ports 1210 and the positions of a plurality of second venting ports 1220 differ, and the positions of a plurality of third venting ports 1230 and the positions of a plurality of fourth venting ports 1240 differ. The positions of the plurality of first venting ports 1210 and the positions of the plurality of third venting ports 1230 are common, and the positions of the plurality of second venting ports 1220 and the positions of the plurality of fourth venting ports 1240 are common. A first storage battery module 1000a and a second storage battery module 1000b are arranged with a second surface 1120 and a third surface 1130 facing one another.

Description

Batteries

The present disclosure relates to an assembled battery, and particularly to an assembled battery including a plurality of storage battery modules for accommodating a plurality of storage battery cells.

In an example of an assembled battery in which a plurality of battery modules are combined, a plurality of battery modules are stacked in the vertical direction. When an abnormality occurs in the battery in the case of the battery module arranged on the lower side and gas is released from the battery, the heat of the gas affects the battery of the battery module located on the upper side. Therefore, a communication portion is arranged toward the upper part while being separated from the side surface of the lower battery module (see, for example, Patent Document 1).

International Publication No. 15/053119

In an assembled battery, multiple battery modules may be arranged horizontally. In such a structure, when an abnormality occurs in the battery in the case of one battery module and gas is released from the battery, it is required to reduce the influence of the heat of the gas on the batteries of the adjacent battery modules. Be done.

The present disclosure has been made in view of such a situation, and an object thereof is to provide a technique for reducing the influence of the gas discharged from one battery module on another battery module.

In order to solve the above problems, the assembled battery of a certain aspect of the present disclosure includes a first storage battery module having a first surface and a second surface facing each other, and a third surface and a fourth surface facing each other. It includes a second storage battery module having a surface. On the projection plane parallel to the first plane and the second plane, the positions of the plurality of first exhaust ports arranged on the first plane and the positions of the plurality of second exhaust ports arranged on the second plane are Differently, on the projection plane parallel to the third plane and the fourth plane, the positions of the plurality of third exhaust ports arranged on the third plane and the positions of the plurality of fourth exhaust ports arranged on the fourth plane. However, when the first surface and the third surface correspond to each other, the positions of the plurality of first exhaust ports and the positions of the plurality of third exhaust ports are common, and the second surface and the fourth surface are used. When corresponding to each other, the positions of the plurality of second exhaust ports and the positions of the plurality of fourth exhaust ports are common, and the second surface and the third surface are opposed to each other so that the first storage battery module and the second storage battery are opposed to each other. The modules are lined up.

Another aspect of the present disclosure is also an assembled battery. This assembled battery includes a first storage battery module having a first surface and a second surface facing each other, and a second storage battery module having a third surface and a fourth surface facing each other. On the projection plane parallel to the first plane and the second plane, the positions of the plurality of first exhaust ports arranged on the first plane and the positions of the plurality of second exhaust ports arranged on the second plane are Differently, on the projection plane parallel to the third plane and the fourth plane, the positions of the plurality of third exhaust ports arranged on the third plane and the positions of the plurality of fourth exhaust ports arranged on the fourth plane. However, when the first surface and the third surface correspond to each other, the positions of the plurality of first exhaust ports and the positions of the plurality of third exhaust ports are common, and the second surface and the fourth surface are used. When corresponding to each other, the positions of the plurality of second exhaust ports and the positions of the plurality of fourth exhaust ports are common, the second surface and the fourth surface are opposed to each other, and the second surface and the fourth surface are associated with each other. The first storage battery module and the second storage battery module are arranged side by side on a projection plane parallel to the above, with the orientation of the first storage battery module and the orientation of the second storage battery module changed.

According to the present disclosure, the influence of the gas discharged from one battery module on another battery module can be reduced.

It is a perspective view which shows the structure of the storage battery module which concerns on Example 1. FIG. It is an exploded perspective view which shows the structure of the storage battery module of FIG. It is another exploded perspective view which shows the structure of the storage battery module of FIG. It is sectional drawing which shows the structure of the storage battery module of FIG. It is another cross-sectional view which shows the structure of the storage battery module of FIG. 6 (a)-(b) are diagrams showing an outline of gas emission in the storage battery module of FIG. 1. 7 (a)-(c) are diagrams showing an outline of the structure of the storage battery module according to the first embodiment. 8 (a)-(c) are views showing the structure of the assembled battery according to the first embodiment. 9 (a)-(d) are views showing another structure of the assembled battery according to the first embodiment. 10 (a)-(c) are diagrams showing an outline of the structure of the storage battery module according to the second embodiment. 11 (a)-(c) are views showing the structure of the assembled battery according to the second embodiment. 12 (a)-(f) are views showing another structure of the assembled battery according to the second embodiment.

(Example 1)
An outline of the embodiment will be described before the embodiment of the present disclosure is specifically described. The present embodiment relates to an assembled battery including a plurality of storage battery modules in which a plurality of storage battery cells are housed. In the storage battery module, each storage battery cell has a structure in which the positive electrode and the negative electrode face each other, and for example, the positive electrodes are arranged so as to face the same direction. When the storage battery cell is a lithium ion secondary battery, gas is generated in the storage battery cell when an internal short circuit or the like occurs. Further, the pressure inside the storage battery cell increases due to the generation of gas, but the gas is discharged from the positive electrode side to the outside of the storage battery cell by the safety mechanism. Such a gas has a high temperature and a high pressure, and when combustion by the gas occurs, other storage battery cells in the storage battery module also undergo thermal runaway (burning). This kind of burning may burn the entire storage battery module or the entire product. In order to suppress burning due to gas, a space is provided between the structure of the storage battery and the surface of the plurality of storage battery cells on the positive electrode side, and the space is connected to the exhaust port. The high-temperature gas from the storage battery cell is discharged into the space, and is discharged from the exhaust port to the outside of the storage battery module.

Under such circumstances, if the space has a structure divided into a plurality of parts, it becomes difficult for the gas to be discharged from one exhaust port. Therefore, burning with gas is likely to occur. On the other hand, when a plurality of exhaust ports are connected to one space, gas is easily discharged. However, when a plurality of exhaust ports are connected to one space, air easily flows into the space from outside the storage battery module, and high-temperature combustion due to gas is likely to occur. Therefore, the relationship between the space inside the structure and the exhaust port that suppresses high-temperature combustion by gas is required. In the storage battery module according to this embodiment, one exhaust port is connected to one space. Therefore, when one space is formed in the structure, one exhaust port is provided in the structure. Further, when a plurality of spaces are formed in the structure, a plurality of exhaust ports are provided in the structure. Here, in general, the relationship is incomplete combustion temperature <complete combustion temperature, and if a large amount of air (oxygen) is sent in like a "bellows" without melting the metal, the combustion temperature becomes even higher. The core of the candle is known to have an incomplete combustion of about 600 ° C, and the tip of the flame has a temperature of over 1000 ° C.

The assembled battery is formed by arranging such storage battery modules in the horizontal direction and electrically connecting them. When the gas discharged from the exhaust port of one storage battery module flows into the inside of the other storage battery module from the exhaust port of another storage battery module installed in the vicinity, the internal storage battery cell is hit, and the other There is a risk of thermal runaway of the storage battery module. Therefore, it is required to prevent the gas discharged from one storage battery module from directly flowing into another adjacent storage battery module. In the assembled battery according to the present embodiment, the exhaust ports of the two adjacent storage battery modules are provided at positions where they are staggered vertically and horizontally. With such a structure, it becomes difficult for the gas discharged from one storage battery module to directly flow into another adjacent storage battery module. Further, even when the gas flows into another adjacent storage battery module, the gas is cooled by moving a certain distance, so that the risk of burning is reduced. In the following description, "parallel" and "vertical" include not only perfectly parallel and vertical, but also cases where they are deviated from parallel and vertical within an error range. In addition, "abbreviation" means that they are the same in an approximate range.

Here, (1) the structure of the storage battery module 1000 included in the assembled battery 3000 will be described, and then (2) the structure of the assembled battery 3000 will be described.
(1) Structure of Storage Battery Module 1000 Included in Assembly Battery 3000 FIG. 1 is a perspective view showing the structure of storage battery module 1000. As shown in FIG. 1, a Cartesian coordinate system including the x-axis, y-axis, and z-axis is defined. The x-axis and y-axis are orthogonal to each other in the bottom surface of the storage battery module 1000. The z-axis is perpendicular to the x-axis and the y-axis and extends in the height (vertical) direction of the storage battery module 1000. Further, the positive directions of the x-axis, the y-axis, and the z-axis are defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow. The positive side of the x-axis is the "front side" or "front side", the negative side of the x-axis is the "rear side" or "back side", and the positive side of the z-axis is the "upper side" or "top side". , The negative side of the z-axis may be referred to as the "lower side" or the "bottom side". Further, the positive side in the y-axis direction may be referred to as "right side", and the negative side in the y-axis direction may be referred to as "left side".

The structure 100 includes a front housing 110, a rear housing 130, and a right lid 352. The front housing 110 includes a front 112, a front lower surface 114, a front upper surface 116, a first front exhaust port 118a collectively referred to as a front exhaust port 118, a fourth front exhaust port 118d, and a left side surface 150. The rear housing 130 includes a rear surface 132, a rear side lower surface 134, a rear side upper surface 136, and a right side surface 152. Each component of the front housing 110 and the rear housing 130 is connected by screws, welding, an adhesive, or the like, but a known technique may be used, and thus description thereof will be omitted here.

The front surface 112 of the front housing 110 has a rectangular plate shape extending on the yz plane. The front lower surface 114 extends from the lower end of the front surface 112 toward the rear side, the front upper surface 116 extends from the upper end of the front surface 112 toward the rear side, and the left side surface 150 extends from the left side end of the front surface 112 toward the rear side. Extend. The front lower surface 114, the front upper surface 116, and the left side 150 all have a plate shape. The plate shape may be rectangular. Further, the rear surface 132 of the rear housing 130 has a rectangular plate shape extending on the yz plane. The rear lower surface 134 extends from the lower end of the rear surface 132 toward the front side, the rear upper surface 136 extends from the upper end of the rear surface 132 toward the front side, and the right side surface 152 extends from the right end of the rear surface 132 toward the front side. .. The rear lower surface 134, the rear upper surface 136, and the right side 152 all have a plate shape. The plate shape may be rectangular.

By connecting the rear end of the front lower surface 114 and the front end of the rear lower surface 134, the front lower surface 114 and the rear lower surface 134 form one lower surface. Further, by connecting the rear end of the front upper surface 116 and the front end of the rear upper surface 136, the front upper surface 116 and the rear upper surface 136 form one upper surface. The lower surface and the upper surface intersect the front surface 112 and the rear surface 132. By connecting the front housing 110 and the rear housing 130 in this way, the structure 100 has a box shape. At that time, the right side of the structure 100 is blocked by the right side surface 152 and the right side lid 352, and the left side of the structure 100 is blocked by the left side surface 150 and the left side lid (not shown). Hereinafter, the front surface 112 may be referred to as a first surface, the rear surface 132 may be referred to as a second surface, the lower surface may be referred to as a third surface, and the upper surface may be referred to as a fourth surface. Here, the front housing 110 and the rear housing 130 are made of a material having high thermal conductivity, for example, metal or carbon. Therefore, the front surface 112, the front lower surface 114, the front upper surface 116, the rear surface 132, the rear lower surface 134, and the rear upper surface 136 are, for example, metal plates.

In the following, the structure of such a storage battery module 1000 will be further described with reference to FIGS. 2 to 5. FIG. 2 is an exploded perspective view showing the structure of the storage battery module 1000. FIG. 3 is another exploded perspective view showing the structure of the storage battery module 1000, and shows a structure in which FIG. 2 is further disassembled. FIG. 4 is a cross-sectional view showing the structure of the storage battery module 1000, and is a cross-sectional view taken along the line AA'in FIG. FIG. 5 is another cross-sectional view showing the structure of the storage battery module 1000, and is a cross-sectional view taken along the line BB'of FIG.

The combination of the front case 240 and the rear case 250 is stored between the front housing 110 and the rear housing 130. The combination of the front case 240 and the rear case 250 has a hollow box shape and is formed of an insulating material such as resin. In this combination, the rear end of the front case 240 and the front end of the rear case 250 are connected, the front case 240 faces the front housing 110, and the rear case 250 faces the rear housing 130. .. Inside the combination of the front side case 240 and the rear side case 250, the first storage battery assembly 200a to the seventh storage battery assembly 200g and the battery holder 230, which are collectively called the storage battery assembly 200, are housed. In particular, from the left side to the right side, the first storage battery assembly 200a, the second storage battery assembly 200b, ..., The sixth storage battery assembly 200f, and the seventh storage battery assembly 200g are arranged in this order. Therefore, it can be said that the lower surface and the upper surface face each other with the storage battery assembly 200 in between. A plurality of storage battery cells 210 are arranged in each storage battery assembly 200.

The storage battery cell 210 is, for example, a cylindrical lithium ion secondary battery. A positive electrode 212 and a negative electrode 214 facing opposite to each other are arranged at both ends of the cylindrical shape of the storage battery cell 210. A known technique may be used for the storage battery cell 210, and a safety mechanism for releasing high-temperature and high-pressure gas to the outside is provided when the internal pressure rises due to the occurrence of an internal short circuit or the like. Generally, the high temperature and high pressure gas is discharged from the positive electrode 212 side.

Here, the plurality of storage battery cells 210 included in each of the first storage battery assembly 200a, the third storage battery assembly 200c, the fifth storage battery assembly 200e, and the seventh storage battery assembly 200g have the positive electrode 212 facing forward. The negative electrode 214 is directed to the rear side. Further, in the plurality of storage battery cells 210 included in each of the second storage battery assembly 200b, the fourth storage battery assembly 200d, and the sixth storage battery assembly 200f, the positive electrode 212 faces the rear side and the negative electrode 214 faces the front side. That is, the direction of the positive electrode 212 is the same in one storage battery assembly 200, but the direction of the positive electrode 212 is opposite between the two adjacent storage battery assemblies 200. When the front electrode facing the front surface 112 is called the "first electrode" and the rear electrode facing the rear surface 132 is called the "second electrode", in the first storage battery assembly 200a or the like, the first electrode is used. The electrode is the positive electrode 212, and the second electrode is the negative electrode 214. Further, in the second storage battery assembly 200b or the like, the first electrode is the negative electrode 214 and the second electrode is the positive electrode 212.

The battery holder 230 is provided with a through hole into which each of the plurality of storage battery cells 210 can be inserted, thereby fixing the respective positions of the plurality of storage battery cells 210. The battery holder 230 is made of an insulating material such as resin. A front case 240 is attached to the front side of the plurality of storage battery cells 210 fixed by the battery holder 230, and a rear case 250 is attached to the rear side of the plurality of storage battery cells 210 fixed by the battery holder 230.

The front case 240 has a plate-shaped front case plate portion 244 that extends in the yz plane, and the front case plate portion 244 is provided with a through hole at a position facing the positive electrode 212 of each storage battery cell 210. Further, on the front surface of the front case plate portion 244, a first front partition wall 242a is provided at a position at the boundary between the second storage battery assembly 200b and the third storage battery assembly 200c. A second front partition wall 242b is provided at the boundary between the fourth storage battery assembly 200d and the fifth storage battery assembly 200e, and the boundary position between the sixth storage battery assembly 200f and the seventh storage battery assembly 200g. Is provided with a third front partition 242c. The first front partition wall 242a to the third front partition wall 242c are collectively referred to as the front partition wall 242, and the front partition wall 242 projects toward the front side and extends in the vertical direction.

The front surface of the front case plate portion 244 is divided into the first front recess 246a to the fourth front recess 246d by the first front partition 242a to the third front partition 242c. For example, the second front side recess 246b is arranged at a portion sandwiched between the first front side partition wall 242a and the second front side partition wall 242b, that is, at a position facing the third storage battery assembly 200c and the fourth storage battery assembly 200d. The first front recess 246a and the third front recess 246c are the same as the second front recess 246b. On the other hand, since the fourth front recess 246d is arranged at a position facing only the seventh storage battery assembly 200g, it is narrower than the first front recess 246a to the third front recess 246c. Such first front recesses 246a to fourth front recesses 246d are collectively referred to as front recesses 246.

As shown in FIGS. 2 and 3, the first front lead plate 300a is fitted into the first front recess 246a, and the second front lead plate 300b is fitted into the second front recess 246b. Further, the third front lead plate 300c is fitted into the third front recess 246c, and the fourth front lead plate 300d is fitted into the fourth front recess 246d. The first front lead plate 300a to the fourth front lead plate 300d are collectively referred to as the front lead plate 300, and the front lead plate 300 has a plate shape. The first front lead plate 300a is connected to the positive electrode 212 of the plurality of storage battery cells 210 of the first storage battery assembly 200a and the negative electrode 214 of the plurality of storage battery cells 210 of the second storage battery assembly 200b. Since the first front lead plate 300a is provided with a wiring pattern for electrically connecting one positive electrode 212 and one negative electrode 214, one storage battery cell 210 of the first storage battery assembly 200a and the second storage battery cell 210 and the second One storage battery cell 210 of the storage battery assembly 200b is connected in series. Here, a through hole is provided in a portion of the first front lead plate 300a connected to the positive electrode 212. The second front lead plate 300b and the third front lead plate 300c are the same as the first front lead plate 300a. On the other hand, the fourth front lead plate 300d is connected only to the positive electrode 212 of the plurality of storage battery cells 210 of the seventh storage battery assembly 200 g. Therefore, the fourth front lead plate 300d is smaller than the first front lead plate 300a to the third front lead plate 300c.

The rear case 250 has a plate-shaped rear case plate portion 254 that extends in the yz plane, and the rear case plate portion 254 is provided with a through hole at a position facing the positive electrode 212 of each storage battery cell 210. Be done. Further, as shown in FIG. 5, on the rear surface of the rear case plate portion 254, the first rear partition wall 252a is located at the boundary between the first storage battery assembly 200a and the second storage battery assembly 200b. Is provided. A second rear partition wall 252b is provided at the boundary between the third storage battery assembly 200c and the fourth storage battery assembly 200d, and the boundary between the fifth storage battery assembly 200e and the sixth storage battery assembly 200f. A third rear partition 252c is provided at the position. The first rear partition wall 252a to the third rear partition wall 252c are collectively referred to as the rear partition wall 252, and the rear partition wall 252 projects toward the rear side and extends in the vertical direction.

The rear surface of the rear case plate portion 254 is divided into the first posterior recess 256a to the fourth posterior recess 256d by the first posterior partition wall 252a to the third posterior partition wall 252c. For example, the second rear side recess 256b is arranged at a portion sandwiched between the first rear side partition wall 252a and the second rear side partition wall 252b, that is, at a position facing the second storage battery assembly 200b and the third storage battery assembly 200c. Will be done. The third posterior recess 256c and the fourth posterior recess 256d are the same as the second posterior recess 256b. On the other hand, since the first rear recess 256a is arranged at a position facing only the first storage battery assembly 200a, it is narrower than the second posterior recess 256b to the fourth posterior recess 256d. Such first rear recesses 256a to fourth posterior recesses 256d are collectively referred to as rear recesses 256.

The first rear lead plate 302a is fitted into the first rear recess 256a, and the second rear lead plate 302b is fitted into the second rear recess 256b. Further, the third rear lead plate 302c is fitted into the third rear recess 256c, and the fourth rear lead plate 302d is fitted into the fourth rear recess 256d. The first rear lead plate 302a to the fourth rear lead plate 302d are collectively referred to as the rear lead plate 302, and the rear lead plate 302 has a plate shape. The second rear lead plate 302b is connected to the positive electrode 212 of the plurality of storage battery cells 210 of the second storage battery assembly 200b and the negative electrode 214 of the plurality of storage battery cells 210 of the third storage battery assembly 200c. Since the second rear lead plate 302b is provided with a wiring pattern for electrically connecting one positive electrode 212 and one negative electrode 214, one storage battery cell 210 of the second storage battery assembly 200b and the first storage battery cell 210 One storage battery cell 210 of the three storage battery assembly 200c is connected in series. Here, a through hole is provided in a portion of the second rear lead plate 302b connected to the positive electrode 212. The third rear lead plate 302c and the fourth rear lead plate 302d are the same as the second rear lead plate 302b. On the other hand, the first rear lead plate 302a is connected only to the negative electrodes 214 of the plurality of storage battery cells 210 of the first storage battery assembly 200a. Therefore, the first rear lead plate 302a is smaller than the second rear lead plate 302b to the fourth rear lead plate 302d. By such a front lead plate 300 and a rear lead plate 302, one storage battery cell 210 included in each of the first storage battery assembly 200a to the seventh storage battery assembly 200g is connected in series.

As shown in FIGS. 2 and 3, the control board tray 330 is attached to the upper side of the front side case 240 and the rear side case 250 that are combined while accommodating the storage battery assembly 200. The control board tray 330 is a plate-shaped tray extending in the left-right direction. The control board 332 is arranged on the control board tray 330. The control board 332 is equipped with an IC (Integrated Circuit) or the like, and controls the operation of the storage battery module 1000. The control board 332 has a plate shape extending in the left-right direction like the control board tray 330, but is smaller than the control board tray 330. The control board lid 334 is attached so as to cover the upper side of the control board tray 330 on which the control board 332 is arranged. The control board lid 334 is a lid for protecting the control board 332, and has a shape that matches the control board tray 330.

As shown in FIG. 5, the left side lid 350 is attached to the left side of the front side case 240 and the rear side case 250 combined while accommodating the storage battery assembly 200, and the right side lid 352 is attached to the right side. The left side lid 350 and the right side lid 352 have a plate shape extending in the vertical direction, and protect the combination of the front side case 240 and the rear side case 250 from the side surface. The control board tray 330, the control board lid 334, the left side lid 350, and the right side lid 352 are made of an insulating material such as resin.

As shown in FIG. 2, the combination of the front side case 240 and the rear side case 250 to which the control board lid 334, the left side lid 350, and the right side lid 352 are attached from the control board tray 330 is the front side housing 110 as described above. It is arranged between the rear housing 130 and the rear housing 130. As a result, as shown in FIG. 4, a front space 400 (third front space 400c) surrounded by the front surface 112, the front lower surface 114, the front upper surface 116, and the front lead plate 300 (third front lead plate 300c) is formed. To. Here, the third front lead plate 300c corresponds to a plurality of first electrode-side surfaces in the fifth storage battery assembly 200e and the sixth storage battery assembly 200f. Of the third front space 400c, the portion of the front surface 112 located on the lower surface side of the storage battery cell 210 at the lower surface side end of the fifth storage battery assembly 200e and the sixth storage battery assembly 200f, or the front lower surface 114 has a third. A front exhaust port 118c is provided. The third front exhaust port 118c is a through hole formed in the front 112 portion or the front lower surface 114, which can be said to be an opening.

Further, a rear space 410 (third rear space 410c) is formed surrounded by the rear surface 132, the rear lower surface 134, the rear upper surface 136, and the rear lead plate 302 (third rear lead plate 302c). Here, the third rear lead plate 302c corresponds to a plurality of second electrode-side surfaces in the fourth storage battery assembly 200d and the fifth storage battery assembly 200e. Of the third rear space 410c, the portion of the rear surface 132 located on the lower surface side of the storage battery cell 210 at the lower end side end of the fourth storage battery assembly 200d and the fifth storage battery assembly 200e, or the rear lower surface 134 has a third. 2 The rear exhaust port 138b (FIG. 2) is provided. The second rear exhaust port 138b is a through hole formed in a portion of the rear surface 132 or a rear lower surface 134.

The front space 400 and the rear space 410 will be described in more detail with reference to FIG. 5. In the front space 400, the first front space 400a to the fourth front space 400d are provided by the first front partition wall 242a to the third front partition wall 242c. It is divided into. Therefore, it can be said that the front partition wall 242 partitions the adjacent front space 400. The first front space 400a to the fourth front space 400d are arranged side by side in the left-right direction. In particular, the first front space 400a to the third front space 400c are arranged so as to face the two storage battery assemblies 200, while the fourth front space 400d is arranged so as to correspond to only one storage battery assembly 200. Therefore, the volume of the fourth front space 400d is smaller than the respective volumes of the first front space 400a to the third front space 400c. Further, one front exhaust port 118 is provided in the lower portion of each front space 400. Therefore, one front space 400 has one front exhaust port 118.

Further, the posterior space 410 is divided into the first posterior space 410a and the fourth posterior space 410d by the first posterior partition wall 252a to the third posterior partition wall 252c. Therefore, it can be said that the posterior partition wall 252 partitions the adjacent posterior space 410. The first rear space 410a to the fourth rear space 410d are arranged side by side in the left-right direction. In particular, the second rear space 410b to the fourth rear space 410d are arranged so as to face the two storage battery assemblies 200, but the first rear space 410a is arranged so as to correspond to only one storage battery assembly 200. Therefore, the volume of the first rear space 410a is smaller than the respective volumes of the second rear space 410b to the fourth rear space 410d. Further, one rear exhaust port 138 is provided in each lower portion of the second rear space 410b to the fourth rear space 410d.

6 (a)-(b) show an outline of gas emission in the storage battery module 1000. FIG. 6A is a cross-sectional view simply showing the structure of the storage battery module 1000, and is a cross-sectional view in the same direction as that of FIG. Here, as an example, the first storage battery cells 210a to the eighth storage battery cells 210h are arranged from the lower side to the upper side. As described above, the front space 400 is arranged on the front side of these storage battery cells 210, and the front exhaust port 118 is provided on the front lower surface 114 in contact with the front space 400.

When thermal runaway occurs in the third storage battery cell 210c due to an internal short circuit or the like, the third storage battery cell 210c discharges high-temperature and high-pressure gas 500 from the positive electrode 212 side to the front space 400 via the front case 240 and the front lead plate 300. The gas 500 released into the front space 400 comes into contact with the front surface 112. Since the front surface 112 is a metal plate, it absorbs heat from the contacted gas 500 and releases heat to the outside of the storage battery module 1000. In this way, the gas 500 is deprived of heat and cooled by contact with the front surface 112. Further, since the cooled gas 500 is diffused in the front space 400, the pressure of the gas 500 decreases. Further, the gas 500 whose temperature and pressure have decreased is discharged to the outside of the storage battery module 1000 from the front exhaust port 118 provided below the front space 400.

Even if sparks occur when the gas 500 is released from the third storage battery cell 210c due to such a flow of the gas 500, cooling, diffusion, and release are performed, so that high-temperature combustion is less likely to occur. Here, the volume of the fourth front space 400d is smaller than the respective volumes of the first front space 400a to the third front space 400c. Therefore, the pressure in the fourth front space 400d tends to be higher than the other pressures due to the gas 500 discharged from the storage battery cell 210. As a result, the third front partition wall 242c forming the fourth front space 400d is more likely to be damaged than the other front partition walls 242. In this embodiment, in order to prevent damage to the third front partition wall 242c, the size of the fourth front exhaust port 118d provided in the fourth front space 400d is made larger than that of the other front exhaust ports 118. As a result, the increase in pressure in the fourth front space 400d is suppressed. That is, as the size of the front space 400 becomes smaller, the area of the front exhaust port 118 becomes larger.

If the front exhaust port 118 is provided on the front upper surface 116, air may flow in from the lower part of the front space 400 which is not completely sealed. Since the inflowing air is discharged from the front exhaust port 118, an air flow from the lower side to the upper side is generated in the front space 400. Since air is supplied to the spark by such an air flow, high-temperature combustion is likely to occur. In the rear space 410, the gas 500 is cooled, diffused, and released in the same manner as in the front space 400.

FIG. 6B is a cross-sectional view simply showing the structure of the storage battery module 2000 to be compared with the storage battery module 1000 of FIG. 6A, and is a cross-sectional view in the same direction as that of FIG. 6A. Front 2112 to front upper surface 2116, rear surface 2132 to rear upper surface 2136, storage battery assembly 2200 to negative electrode 2214, front case 2240, rear case 2250, front lead plate 2300, rear lead plate 2302, front space 2400, rear space 2410 6 (a) shows the front surface 112 to the front surface surface 116, the rear surface 132 to the rear surface surface 136, the storage battery assembly 200 to the negative electrode 214, the front side case 240, the rear side case 250, the front side lead plate 300, and the rear side lead plate 302. , The front space 400 and the rear space 410. Here, the front exhaust port 2118 is provided in a portion of the front surface 2112 in contact with the front space 400, which faces the positive electrode 2212 of the first storage battery cell 2210a.

When thermal runaway occurs in the first storage battery cell 2210a due to an internal short circuit or the like, the first storage battery cell 2210a discharges high-temperature and high-pressure gas 2500 from the positive electrode 2212 side to the front space 2400 via the front case 2240 and the front lead plate 2300. The gas 2500 released into the front space 2400 is discharged to the outside of the storage battery module 2000 from the front exhaust port 2118. That is, the gas 2500 is not cooled by contact with the front surface 2112. At that time, if sparks are generated, air is supplied to the sparks, so that high-temperature combustion is likely to occur.

In order to clarify the explanation of the structure of the assembled battery 3000, the structures of the storage battery modules 1000 described so far are summarized as shown in FIGS. 7A to 7C. 7 (a)-(c) show the outline of the structure of the storage battery module 1000. 7 (a) shows an outline from the front side of the storage battery module 1000, FIG. 7 (b) shows an outline from the right side of the storage battery module 1000, and FIG. 7 (c) shows an outline from the rear side of the storage battery module 1000. The outline of is shown. The first storage battery assembly 200a to the seventh storage battery assembly 200g are arranged in the left-right direction. In the first storage battery assembly 200a, the positive electrode 212 faces the front side and the negative electrode 214 faces the rear side. In the second storage battery assembly 200b, the negative electrode 214 faces the front side and the positive electrode 212 faces the rear side. Further, a front exhaust port 118 or a rear exhaust port 138 is arranged below the positive electrode 212. Therefore, the front exhaust port 118 is arranged below the first storage battery assembly 200a, the third storage battery assembly 200c, the fifth storage battery assembly 200e, and the seventh storage battery assembly 200g. A rear exhaust port 138 is arranged below the second storage battery assembly 200b, the fourth storage battery assembly 200d, and the sixth storage battery assembly 200f. Further, a positive electrode terminal is provided at the right end of the storage battery module 1000, and a negative electrode terminal is provided at the left end of the storage battery module 1000.

(2) Structure of the assembled battery 3000 FIGS. 8A-(c) show the structure of the assembled battery 3000. FIG. 8A is a perspective view showing the structure of the assembled battery 3000. FIG. 8B is a top view of the assembled battery 3000, but mainly shows the structure of the lower portion of the assembled battery 3000. The assembled battery 3000 includes a first storage battery module 1000a and a second storage battery module 1000b. The first storage battery module 1000a and the second storage battery module 1000b have the same structure as the above-mentioned storage battery module 1000.

The first storage battery module 1000a has a first surface 1110 and a second surface 1120 facing each other, and also has an upper surface 1150 and a lower surface 1160 sandwiched between the first surface 1110 and the second surface 1120. The first surface 1110 corresponds to the front surface 112 of FIG. 1, the second surface 1120 corresponds to the rear surface 132 of FIG. 1, and the upper surface 1150 corresponds to the combination of the front upper surface 116 and the rear upper surface 136 of FIG. Reference numeral 1160 corresponds to the combination of the front lower surface 114 and the rear lower surface 134 in FIG. Further, a plurality of first exhaust ports 1210 are arranged on the lower portion of the first surface 1110, and a plurality of second exhaust ports 1220 are arranged on the lower portion of the second surface 1120. The plurality of first exhaust ports 1210 correspond to the plurality of front exhaust ports 118 of FIG. 2, and the plurality of second exhaust ports 1220 correspond to the plurality of rear exhaust ports 138 of FIG. Here, on the projection plane parallel to the first plane 1110 and the second plane 1120, that is, on the yz plane, the positions of the plurality of first exhaust ports 1210 and the positions of the plurality of second exhaust ports 1220 are different.

The second storage battery module 1000b has a third surface 1130 and a fourth surface 1140 facing each other, and also has an upper surface 1170 and a lower surface 1180 sandwiched between the third surface 1130 and the fourth surface 1140. The third surface 1130 corresponds to the front surface 112 of FIG. 1, the fourth surface 1140 corresponds to the rear surface 132 of FIG. 1, and the upper surface 1170 corresponds to the combination of the front upper surface 116 and the rear upper surface 136 of FIG. Reference numeral 1180 corresponds to the combination of the front lower surface 114 and the rear lower surface 134 in FIG. Further, a plurality of third exhaust ports 1230 are arranged on the lower portion of the third surface 1130, and a plurality of fourth exhaust ports 1240 are arranged on the lower portion of the fourth surface 1140. The plurality of third exhaust ports 1230 correspond to the plurality of front exhaust ports 118 of FIG. 2, and the plurality of fourth exhaust ports 1240 correspond to the plurality of rear exhaust ports 138 of FIG. Here, on the projection plane parallel to the third plane 1130 and the fourth plane 1140, that is, on the yz plane, the positions of the plurality of third exhaust ports 1230 and the positions of the plurality of fourth exhaust ports 1240 are different.

When the first surface 1110 and the third surface 1130 are associated with each other, the positions of the plurality of first exhaust ports 1210 and the positions of the plurality of third exhaust ports 1230 are common. Further, when the second surface 1120 and the fourth surface 1140 are made to correspond to each other, the positions of the plurality of second exhaust ports 1220 and the positions of the plurality of fourth exhaust ports 1240 are common. Here, the first storage battery module 1000a and the second storage battery module 1000b are arranged so that the second surface 1120 and the third surface 1130 face each other. By arranging in this way, the positive electrode terminal 1050 of the first storage battery module 1000a and the positive electrode terminal 1060 of the second storage battery module 1000b face in the same direction. Further, the negative electrode terminal 1052 of the first storage battery module 1000a and the negative electrode terminal 1062 of the second storage battery module 1000b also face in the same direction. Here, by electrically connecting the positive electrode terminal 1050 and the positive electrode terminal 1060 and electrically connecting the negative electrode terminal 1052 and the negative electrode terminal 1062, the first storage battery module 1000a and the second storage battery module 1000b are connected in parallel. Be connected. Further, the second exhaust port 1220 on the second surface 1120 and the third exhaust port 1230 on the third surface 1130 are arranged so as not to face each other.

FIG. 8 (c) is an enlarged view of a part of the second surface 1120 and the third surface 1130 in FIG. 8 (b). Here, it is assumed that thermal runaway occurs in the storage battery cell 210 inside the second storage battery module 1000b, and gas is discharged from the third exhaust port 1230. The gas ejected from the third exhaust port 1230 is generally hot, but the gas corresponds to the second surface 1120. By hitting the second surface 1120, the gas is cooled and diffused. Diffusion causes the gas to move along the second surface 1120, but the movement further cools it. Therefore, even if the gas flows into the first storage battery module 1000a from the second exhaust port 1220, the risk of burning is reduced.

FIGS. 9 (a)-(d) show another structure of the assembled battery 3000. FIG. 9A is a perspective view showing the structure of the assembled battery 3000. FIG. 9B is a top view of the assembled battery 3000, but mainly shows the structure of the lower portion of the assembled battery 3000. The structures of the first storage battery module 1000a and the second storage battery module 1000b included in the assembled battery 3000 are the same as those in FIGS. 8 (a)-(c), but their arrangements are as shown in FIGS. 8 (a)-(c). Is different. The first storage battery module 1000a is arranged in the same manner as in FIG. 8A, but in the second storage battery module 1000b, the fourth surface 1140 faces the second surface 1120, the lower surface 1180 faces upward, and the upper surface faces. The 1170 is placed facing down. In this way, the second storage battery module 1000b is inverted in the xy plane and upside down with respect to the arrangement shown in FIG. 8A. As a result, the first storage battery module 1000a and the second storage battery module 1000b are arranged in different directions on the projection plane parallel to the second plane 1120 and the fourth plane 1140.

By arranging in this way, the positive electrode terminal 1050 of the first storage battery module 1000a and the negative electrode terminal 1062 of the second storage battery module 1000b face in the same direction. Further, the negative electrode terminal 1052 of the first storage battery module 1000a and the positive electrode terminal 1060 of the second storage battery module 1000b also face in the same direction. Here, by electrically connecting the negative electrode terminal 1052 and the positive electrode terminal 1060, the first storage battery module 1000a and the second storage battery module 1000b are connected in series.

The first exhaust port 1210 and the second exhaust port 1220 are arranged in the lower portion of the first storage battery module 1000a, while the third exhaust port 1230 and the fourth exhaust port 1240 are located in the upper portion of the second storage battery module 1000b. Be placed. Therefore, the second exhaust port 1220 and the fourth exhaust port 1240 do not face each other, and the gas discharged from the fourth exhaust port 1240 does not directly flow into the second exhaust port 1220. Further, since the distance between the second exhaust port 1220 and the fourth exhaust port 1240 is longer than the distance between the second exhaust port 1220 and the third exhaust port 1230 in FIGS. 8A-(c), the gas is released. Further cooled.

9 (c)-(d) are the assembled batteries 4000 to be compared with FIGS. 9 (a)-(b), and are shown in the same manner as in FIGS. 9 (a)-(b). The assembled battery 4000 includes the first storage battery module 1000a and the second storage battery module 1000b, which are the same as those in FIGS. 9 (a)-(b), but their arrangement is different from that of FIGS. 9 (a)-(b). The second storage battery module 1000b is arranged so that the fourth surface 1140 faces the second surface 1120, the upper surface 1170 faces upward, and the lower surface 1180 faces downward. As described above, the second storage battery module 1000b is inverted in the xy plane with respect to the arrangement shown in FIG. 8A, but is not inverted upside down. By arranging in this way, the second exhaust port 1220 and the fourth exhaust port 1240 face each other, so that the gas discharged from the fourth exhaust port 1240 directly flows into the second exhaust port 1220. Therefore, such an arrangement is not preferable.

According to this embodiment, when the position of the second exhaust port 1220 and the position of the third exhaust port 1230 are different, the second surface 1120 and the third surface 1130 are opposed to each other, so that the gas is discharged from the second storage battery module 1000b. The influence of the generated gas on the first storage battery module 1000a can be reduced. Further, even if the position of the second exhaust port 1220 and the position of the fourth exhaust port 1240 are common, the orientation of the first storage battery module 1000a and the orientation of the second storage battery module 1000b are changed, so that from the second storage battery module 1000b The influence of the discharged gas on the first storage battery module 1000a can be reduced. Further, since the first exhaust port 1210 to the fourth exhaust port 1240 are arranged in the lower portion of each surface, the structure can be simplified.

Further, since one space formed inside the structure 100 has one exhaust port, the gas 500 discharged from the storage battery cell 210 can be discharged to the outside from the exhaust port. Further, since the gas 500 in one space is discharged to the outside from one exhaust port, the gas 500 can be sufficiently released. Moreover, since the gas 500 is sufficiently released, the occurrence of high-temperature combustion can be suppressed. Further, since the gas 500 in one space is discharged to the outside from one exhaust port, the inflow of air into the space can be suppressed. Moreover, since the inflow of air into the space is suppressed, the occurrence of high-temperature combustion can be suppressed.

Further, since the orientation of the positive electrode 212 is common in different aggregates, a plurality of storage battery cells 210 facing the same direction can be classified into a plurality of aggregates. Further, since the space is divided into a first space and a second space, a small first space and a second space can be formed when the space is large. Further, since one exhaust port is provided for each of the small first space and the second space, the gas 500 can be sufficiently discharged. Further, since one exhaust port is provided for each of the small first space and the second space, the inflow of air into the first space and the second space can be suppressed. Further, since the front surface 112 is a metal plate, the gas 500 can be cooled.

Further, since the directions of the positive electrodes 212 are opposite in different aggregates, a plurality of aggregates can be formed according to the directions of the plurality of storage battery cells 210. Further, since the space is divided into the first space and the second space, the first space and the second space can be formed on opposite sides of the storage battery assembly 200. Further, since one exhaust port is provided for each of the first space and the second space, the gas 500 can be sufficiently discharged. Further, since one exhaust port is provided for each of the first space and the second space, the inflow of air into the first space and the second space can be suppressed. Further, since the front surface 112 and the rear surface 132 are metal plates, the gas 500 can be cooled.

The outline of one aspect of the present disclosure is as follows. The assembled battery (3000) of a certain aspect of the present disclosure includes a first storage battery module (1000a) having a first surface (1110) and a second surface (1120) facing each other, and a third facing each other. It comprises a second storage battery module (1000b) having a surface (1130) and a fourth surface (1140). On the projection plane parallel to the first plane (1110) and the second plane (1120), the positions of the plurality of first exhaust ports (1210) arranged on the first plane (1110) and the second plane (1120). ) Is different from the positions of the plurality of second exhaust ports (1220), and is arranged on the third surface (1130) on the projection plane parallel to the third plane (1130) and the fourth plane (1140). The positions of the plurality of third exhaust ports (1230) to be formed are different from the positions of the plurality of fourth exhaust ports (1240) arranged on the fourth surface (1140), and the first surface (1110) and the third surface are different. When the (1130) is associated, the positions of the plurality of first exhaust ports (1210) and the positions of the plurality of third exhaust ports (1230) are common, and the second surface (1120) and the fourth surface (1120) When the 1140) is associated with the position of the plurality of second exhaust ports (1220) and the positions of the plurality of fourth exhaust ports (1240), the positions of the second surface (1120) and the third surface (1120) are common. The first storage battery module (1000a) and the second storage battery module (1000b) are arranged side by side with the 1130) facing each other.

Another aspect of the present disclosure is also an assembled battery (3000). The assembled battery (3000) includes a first storage battery module (1000a) having a first surface (1110) and a second surface (1120) facing each other, and a third surface (1130) facing each other. It includes a second storage battery module (1000b) having a fourth surface (1140). On a projection plane parallel to the first plane (1110) and the second plane (1120), the positions of a plurality of first exhaust ports (1210) arranged on the first plane (1110) and the second plane (1120). ) Is different from the positions of the plurality of second exhaust ports (1220), and is arranged on the third surface (1130) on the projection plane parallel to the third plane (1130) and the fourth plane (1140). The positions of the plurality of third exhaust ports (1230) to be formed are different from the positions of the plurality of fourth exhaust ports (1240) arranged on the fourth surface (1140), and the first surface (1110) and the third surface are different. When (1130) is associated with each other, the positions of the plurality of first exhaust ports (1210) and the positions of the plurality of third exhaust ports (1230) are common, and the second surface (1120) and the fourth surface (1120) are associated with each other. When the 1140) is associated with the position of the plurality of second exhaust ports (1220) and the positions of the plurality of fourth exhaust ports (1240), the positions of the second surface (1120) and the fourth surface (1120) are common. The orientation of the first storage battery module (1000a) and the orientation of the second storage battery module (1000b) on the projection planes facing the 1140) and parallel to the second plane (1120) and the fourth plane (1140). The first storage battery module (1000a) and the second storage battery module (1000b) are arranged side by side.

The plurality of first exhaust ports (1210) are arranged in the lower portion of the first surface (1110), and the plurality of second exhaust ports (1220) are arranged in the lower portion of the second surface (1120). The third exhaust port (1230) is arranged in the lower portion of the third surface (1130), and the plurality of fourth exhaust ports (1240) are arranged in the lower portion of the fourth surface (1140).

(Example 2)
Next, Example 2 will be described. The second embodiment relates to an assembled battery including a plurality of storage battery modules in which a plurality of storage battery cells are housed, as in the first embodiment. In the first embodiment, the exhaust port of each storage battery module is arranged only in the lower portion, but in the second embodiment, the exhaust port of each storage battery module is arranged in the upper portion and the lower portion. In the following, the differences from the past will be mainly explained.

10 (a)-(c) show an outline of the structure of the storage battery module 1500. 10 (a)-(c) are shown as shown in FIGS. 7 (a)-(c). FIG. 10A shows an outline from the front side of the storage battery module 1500, FIG. 10B shows an outline from the right side of the storage battery module 1500, and FIG. 10C shows an outline from the rear side of the storage battery module 1500. The outline of is shown. Unlike the storage battery module 1000, the storage battery module 1500 has different orientations of the positive electrode 212 and the negative electrode 214 in the upper stage and the lower stage. Further, an upper exhaust port 1510 or an upper exhaust port 1520 is arranged above the positive electrode 212 in the upper stage, and a lower exhaust port 1512 or a lower exhaust port 1522 is arranged below the positive electrode 212 in the lower stage. Further, a positive electrode terminal is provided at the right end of the storage battery module 1500, and a negative electrode terminal is provided at the left end of the storage battery module 1500.

FIGS. 11 (a)-(c) show the structure of the assembled battery 3000. FIG. 11A is a perspective view showing the structure of the assembled battery 3000. 11 (b)-(c) are top views of the assembled battery 3000, FIG. 11 (b) mainly shows the structure of the upper portion of the assembled battery 3000, and FIG. 11 (c) shows the assembled battery 3000. The lower structure is shown in the center. The assembled battery 3000 includes a first storage battery module 1500a and a second storage battery module 1500b. The first storage battery module 1500a and the second storage battery module 1500b have the same structure as the above-mentioned storage battery module 1500.

The first storage battery module 1500a has a first surface 1610 and a second surface 1620 facing each other, and has an upper surface 1650 and a lower surface 1660 sandwiched between the first surface 1610 and the second surface 1620. A plurality of first upper exhaust ports 1710 are arranged on the upper portion of the first surface 1610, and a plurality of first lower exhaust ports 1712 are arranged on the lower portion of the first surface 1610. A plurality of second upper exhaust ports 1720 are arranged on the upper portion of the second surface 1620, and a plurality of second lower exhaust ports 1722 are arranged on the lower portion of the second surface 1620. The plurality of first upper exhaust ports 1710 correspond to the plurality of upper exhaust ports 1510 in FIG. 10 (a), and the plurality of first lower exhaust ports 1712 correspond to the plurality of lower exhaust ports 1512 in FIG. 10 (a). Corresponds to. The plurality of second upper exhaust ports 1720 correspond to the plurality of upper exhaust ports 1520 of FIG. 10 (c), and the plurality of second lower exhaust ports 1722 correspond to the plurality of lower exhaust ports 1522 of FIG. 10 (c). Corresponds to. Here, on the projection plane parallel to the first surface 1610 and the second surface 1620, that is, on the yz plane, the positions of the plurality of first upper exhaust ports 1710 and the positions of the plurality of second upper exhaust ports 1720. Is different. Further, the positions of the plurality of first lower exhaust ports 1712 and the positions of the plurality of second lower exhaust ports 1722 are also different.

The second storage battery module 1500b has a third surface 1630 and a fourth surface 1640 facing each other, and has an upper surface 1670 and a lower surface 1680 sandwiched between the third surface 1630 and the fourth surface 1640. A plurality of third upper exhaust ports 1730 are arranged on the upper portion of the third surface 1630, and a plurality of third lower exhaust ports 1732 are arranged on the lower portion of the third surface 1630. A plurality of fourth upper exhaust ports 1740 are arranged on the upper portion of the fourth surface 1640, and a plurality of fourth lower exhaust ports 1742 are arranged on the lower portion of the fourth surface 1640. The plurality of third upper exhaust ports 1730 correspond to the plurality of upper exhaust ports 1510 in FIG. 10 (a), and the plurality of third lower exhaust ports 1732 correspond to the plurality of lower exhaust ports 1512 in FIG. 10 (a). Corresponds to. The plurality of fourth upper exhaust ports 1740 correspond to the plurality of upper exhaust ports 1520 of FIG. 10 (c), and the plurality of fourth lower exhaust ports 1742 correspond to the plurality of lower exhaust ports 1522 of FIG. 10 (c). Corresponds to. Here, on the projection plane parallel to the third surface 1630 and the fourth surface 1640, that is, on the yz plane, the positions of the plurality of third upper exhaust ports 1730 and the positions of the plurality of fourth upper exhaust ports 1740. Is different. Further, the positions of the plurality of third lower exhaust ports 1732 and the positions of the plurality of fourth lower exhaust ports 1742 are also different.

When the first surface 1610 and the third surface 1630 are associated with each other, the positions of the plurality of first upper exhaust ports 1710 and the positions of the plurality of third upper exhaust ports 1730 are common. Further, the positions of the plurality of first lower exhaust ports 1712 and the positions of the plurality of third lower exhaust ports 1732 are also common. When the second surface 1620 and the fourth surface 1640 are associated with each other, the positions of the plurality of second upper exhaust ports 1720 and the positions of the plurality of fourth upper exhaust ports 1740 are common. The positions of the plurality of second lower exhaust ports 1722 and the positions of the plurality of fourth lower exhaust ports 1742 are also common. Here, the first storage battery module 1500a and the second storage battery module 1500b are arranged so that the second surface 1620 and the third surface 1630 face each other. By arranging in this way, the positive electrode terminal 1550 of the first storage battery module 1500a and the positive electrode terminal 1560 of the second storage battery module 1500b face in the same direction. Further, the negative electrode terminal 1552 of the first storage battery module 1500a and the negative electrode terminal 1562 of the second storage battery module 1500b also face in the same direction. Here, by electrically connecting the positive electrode terminal 1550 and the positive electrode terminal 1560 and electrically connecting the negative electrode terminal 1552 and the negative electrode terminal 1562, the first storage battery module 1500a and the second storage battery module 1500b are connected in parallel. Be connected. Further, the second upper exhaust port 1720 on the second surface 1620 and the third upper exhaust port 1730 on the third surface 1630 are arranged so as not to face each other. The second lower exhaust port 1722 on the second surface 1620 and the third lower exhaust port 1732 on the third surface 1630 are also arranged so as not to face each other.

FIGS. 12 (a)-(f) show another structure of the assembled battery 3000. FIG. 12A is a perspective view showing the structure of the assembled battery 3000. 12 (b)-(c) are top views of the assembled battery 3000, FIG. 12 (b) mainly shows the structure of the upper portion of the assembled battery 3000, and FIG. 12 (c) shows the assembled battery 3000. The lower structure is shown in the center. The structures of the first storage battery module 1500a and the second storage battery module 1500b included in the assembled battery 3000 are the same as those in FIGS. 10 (a)-(c), but their arrangements are as shown in FIGS. 11 (a)-(c). Is different. The first storage battery module 1500a is arranged in the same manner as in FIG. 11A, but in the second storage battery module 1500b, the fourth surface 1640 faces the second surface 1620, the lower surface 1680 faces upward, and the upper surface faces. The 1670 is placed facing down. As described above, the second storage battery module 1500b is inverted and upside down in the xy plane with respect to the arrangement shown in FIG. 11A. As a result, the first storage battery module 1500a and the second storage battery module 1500b are arranged in different directions on the projection plane parallel to the second plane 1620 and the fourth plane 1640.

By arranging in this way, the positive electrode terminal 1550 of the first storage battery module 1500a and the negative electrode terminal 1562 of the second storage battery module 1500b face in the same direction. Further, the negative electrode terminal 1552 of the first storage battery module 1500a and the positive electrode terminal 1560 of the second storage battery module 1500b also face in the same direction. Here, by electrically connecting the negative electrode terminal 1552 and the positive electrode terminal 1560, the first storage battery module 1500a and the second storage battery module 1500b are connected in series.

The first upper exhaust port 1710 and the second upper exhaust port 1720 are arranged in the upper portion of the first storage battery module 1500a, and the fourth lower exhaust port 1742 and the third lower exhaust port 1732 are located in the second storage battery module 1500b. It is placed in the upper part. Therefore, the second upper exhaust port 1720 and the fourth lower exhaust port 1742 do not face each other, and the gas discharged from the fourth lower exhaust port 1742 does not directly flow into the second upper exhaust port 1720.

The first lower exhaust port 1712 and the second lower exhaust port 1722 are arranged in the lower portion of the first storage battery module 1500a, and the third upper exhaust port 1730 and the fourth upper exhaust port 1740 are the second storage battery. It is located in the lower portion of the module 1500b. Therefore, the second lower exhaust port 1722 and the fourth upper exhaust port 1740 do not face each other, and the gas discharged from the fourth upper exhaust port 1740 does not directly flow into the second lower exhaust port 1722.

12 (c)-(d) are the assembled batteries 4000 to be compared with FIGS. 12 (a)-(b), and are shown in the same manner as in FIGS. 12 (a)-(b). The assembled battery 4000 includes the first storage battery module 1500a and the second storage battery module 1500b, which are the same as those in FIGS. 9 (a)-(b), but their arrangements are different from those in FIGS. 12 (a)-(b). The second storage battery module 1500b is arranged so that the fourth surface 1640 faces the second surface 1620, the upper surface 1670 faces upward, and the lower surface 1680 faces downward. As described above, the second storage battery module 1500b is inverted in the xy plane with respect to the arrangement shown in FIG. 11A, but is not inverted upside down. By arranging in this way, the second upper exhaust port 1720 and the fourth upper exhaust port 1740 face each other, so that the gas discharged from the fourth upper exhaust port 1740 directly flows into the second upper exhaust port 1720. .. Further, since the second lower exhaust port 1722 and the fourth lower exhaust port 1742 face each other, the gas discharged from the fourth lower exhaust port 1742 directly flows into the second lower exhaust port 1722. Therefore, such an arrangement is not preferable.

According to this embodiment, when the position of the second exhaust port (1720, 1722) is different from the position of the third exhaust port (1730, 1732), the second surface 1620 and the third surface 1630 are opposed to each other. Therefore, the influence of the gas discharged from the second storage battery module 1500b on the first storage battery module 1500a can be reduced. Further, even if the positions of the second exhaust port (1720, 1722) and the position of the fourth exhaust port (1740, 1742) are the same, the orientation of the first storage battery module 1500a and the orientation of the second storage battery module 1500b are changed. Therefore, the influence of the gas discharged from the second storage battery module 1500b on the first storage battery module 1500a can be reduced. Further, since the first exhaust ports (1710, 1712) to the fourth exhaust ports (1740, 1742) are arranged on the upper portion and the lower portion of each surface, gas can be efficiently discharged.

The outline of one aspect of the present disclosure is as follows. The outline of one aspect of the present disclosure is as follows. The assembled battery (3000) of a certain aspect of the present disclosure includes a first storage battery module (1500a) having a first surface (1610) and a second surface (1620) facing each other, and a third facing each other. It includes a second storage battery module (1500b) having a surface (1630) and a fourth surface (1640). On the projection plane parallel to the first plane (1610) and the second plane (1620), the positions of the plurality of first exhaust ports (1710, 1712) arranged on the first plane (1610) and the second plane. Unlike the positions of the plurality of second exhaust ports (1720, 1722) arranged at (1620), the third surface (1640) is on the projection surface parallel to the third surface (1630) and the fourth surface (1640). The positions of the plurality of third exhaust ports (1730, 1732) arranged on the fourth surface (1640) are different from the positions of the plurality of fourth exhaust ports (1740, 1742) arranged on the fourth surface (1640). When the surface (1610) and the third surface (1630) are associated with each other, the positions of the plurality of first exhaust ports (1710, 1712) and the positions of the plurality of third exhaust ports (1730, 1732) are common. , The positions of the plurality of second exhaust ports (1720, 1722) and the positions of the plurality of fourth exhaust ports (1740, 1742) when the second surface (1620) and the fourth surface (1640) are associated with each other. Is common, and the first storage battery module (1500a) and the second storage battery module (1500b) are arranged so that the second surface (1620) and the third surface (1630) face each other.

Another aspect of the present disclosure is also an assembled battery (3000). The assembled battery (3000) includes a first storage battery module (1500a) having a first surface (1610) and a second surface (1620) facing each other, and a third surface (1630) facing each other. It includes a second storage battery module (1500b) having a fourth surface (1640). The positions of the plurality of first exhaust ports (1710, 1712) arranged on the first surface (1610) and the second surface on the projection plane parallel to the first plane (1610) and the second plane (1620). On a projection plane parallel to the third plane (1630) and the fourth plane (1640), the third plane (1620, 1722) is different from the positions of the plurality of second exhaust ports (1720, 1722) arranged in (1620). The positions of the plurality of third exhaust ports (1730, 1732) arranged in 1630) are different from the positions of the plurality of fourth exhaust ports (1740, 1742) arranged in the fourth surface (1640). When the surface (1610) and the third surface (1630) are associated with each other, the positions of the plurality of first exhaust ports (1710, 1712) and the positions of the plurality of third exhaust ports (1730, 1732) are common. , The positions of the plurality of second exhaust ports (1720, 1722) and the positions of the plurality of fourth exhaust ports (1740, 1742) when the second surface (1620) and the fourth surface (1640) are associated with each other. The first storage battery module is on a projection plane in which the second plane (1620) and the fourth plane (1640) are opposed to each other and parallel to the second plane (1620) and the fourth plane (1640). The first storage battery module (1500a) and the second storage battery module (1500b) are arranged side by side by changing the orientation of the (1500a) and the orientation of the second storage battery module (1500b).

The plurality of first exhaust ports (1710, 1712) are arranged on the upper portion and the lower portion of the first surface (1610), and the plurality of second exhaust ports (1720, 1722) are the upper portion of the second surface (1620). The plurality of third exhaust ports (1730, 1732) are arranged in the upper portion and the lower portion of the third surface (1630), and the plurality of fourth exhaust ports (1740, 1742) are arranged in the lower portion. It is arranged on the upper and lower portions of the four surfaces (1640).

The present disclosure has been described above based on the examples. This embodiment is an example, and it will be understood by those skilled in the art that various modifications are possible for each of these components or combinations of each processing process, and that such modifications are also within the scope of the present disclosure. ..

In Examples 1 and 2, the number of the storage battery modules 1000 or the storage battery modules 1500 included in the assembled battery 3000 is said to be "2". However, the number is not limited to this, and for example, the number of the storage battery modules 1000 or the storage battery modules 1500 included in the assembled battery 3000 may be "3" or more. At that time, the storage battery modules 1000 or the storage battery modules 1500 may be arranged according to the regularity of arrangement in Examples 1 and 2. According to this modification, the degree of freedom of configuration can be improved.

In Examples 1 and 2, the front space 400 and the rear space 410 are formed. However, the present invention is not limited to this, and for example, only one of the front space 400 and the rear space 410 may be formed. According to this modification, when all the storage battery cells 210 are arranged so as to face the same direction, a space suitable for the arrangement can be formed.

In Examples 1 and 2, a plurality of front spaces 400 are arranged. However, the number of front spaces 400 is not limited to this, and may be one. According to this modification, the structure can be simplified when the size of the front space 400 is small. The same applies to the rear space 410.

In Examples 1 and 2, the front partition wall 242 and the rear partition wall 252 are formed of resin or the like. However, the present invention is not limited to this, and for example, the front partition wall 242 and the rear partition wall 252 formed of resin or the like may be reinforced by a metal plate or the like from the front space 400 or the rear space 410 side. According to this modification, even if the pressure of the generated gas 500 becomes high, the front partition wall 242 and the rear partition wall 252 can be less likely to be damaged.

According to the present disclosure, the influence of the gas discharged from one battery module on another battery module can be reduced.

1000 storage battery module, 1110 1st surface, 1120 2nd surface, 1130 3rd surface, 1140 4th surface, 1150 upper surface, 1160 lower surface, 1170 upper surface, 1180 lower surface, 1210 1st exhaust port, 1220 2nd exhaust port, 1230th 3 exhaust ports, 1240 4th exhaust port, 3000 rechargeable batteries.

Claims (4)

1. A first storage battery module having a first surface and a second surface facing each other,
   A second storage battery module having a third surface and a fourth surface facing each other is provided.
   On the projection plane parallel to the first surface and the second surface, the positions of the plurality of first exhaust ports arranged on the first surface and the plurality of second exhaust ports arranged on the second surface. Unlike the position of
   On the projection surface parallel to the third surface and the fourth surface, the positions of the plurality of third exhaust ports arranged on the third surface and the plurality of fourth exhaust ports arranged on the fourth surface. Unlike the position of
   When the first surface and the third surface are associated with each other, the positions of the plurality of first exhaust ports and the positions of the plurality of third exhaust ports are common.
   When the second surface and the fourth surface correspond to each other, the positions of the plurality of second exhaust ports and the positions of the plurality of fourth exhaust ports are common.
   The first storage battery module and the second storage battery module are arranged side by side with the second surface and the third surface facing each other.
   Batteries assembled.
2. A first storage battery module having a first surface and a second surface facing each other,
   A second storage battery module having a third surface and a fourth surface facing each other is provided.
   On the projection plane parallel to the first surface and the second surface, the positions of the plurality of first exhaust ports arranged on the first surface and the plurality of second exhaust ports arranged on the second surface. Unlike the position of
   On the projection surface parallel to the third surface and the fourth surface, the positions of the plurality of third exhaust ports arranged on the third surface and the plurality of fourth exhaust ports arranged on the fourth surface. Unlike the position of
   When the first surface and the third surface are associated with each other, the positions of the plurality of first exhaust ports and the positions of the plurality of third exhaust ports are common.
   When the second surface and the fourth surface correspond to each other, the positions of the plurality of second exhaust ports and the positions of the plurality of fourth exhaust ports are common.
   The orientation of the first storage battery module and the orientation of the second storage battery module are oriented on a projection surface in which the second surface and the fourth surface face each other and are parallel to the second surface and the fourth surface. Alternatively, the first storage battery module and the second storage battery module are arranged side by side.
   Batteries assembled.
3. The plurality of first exhaust ports are arranged in the lower portion of the first surface.
   The plurality of second exhaust ports are arranged in the lower portion of the second surface.
   The plurality of third exhaust ports are arranged in the lower portion of the third surface.
   The plurality of fourth exhaust ports are arranged in the lower portion of the fourth surface.
   The assembled battery according to claim 1 or 2.
4. The plurality of first exhaust ports are arranged on the upper portion and the lower portion of the first surface.
   The plurality of second exhaust ports are arranged on the upper portion and the lower portion of the second surface.
   The plurality of third exhaust ports are arranged on the upper portion and the lower portion of the third surface.
   The plurality of fourth exhaust ports are arranged on the upper portion and the lower portion of the fourth surface.
   The assembled battery according to claim 1 or 2.

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