JP7300608B2 - assembled battery - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to an assembled battery, and more particularly to an assembled battery including a plurality of storage battery modules each housing a plurality of storage battery cells.

In one example of an assembled battery in which a plurality of battery modules are combined, a plurality of battery modules are vertically stacked. 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 batteries in the battery module arranged on the upper side. For this reason, a communicating portion is arranged that extends upward while being separated from the side surface of the battery module on the lower side (see, for example, Patent Literature 1).

WO 15/053119

In an assembled battery, a plurality of battery modules may be horizontally arranged. In such a structure, when an abnormality occurs in a 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 in the adjacent battery module. be done.

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

In order to solve the above problems, an assembled battery according to one aspect of the present disclosure includes a first storage battery module having a first surface and a second surface facing opposite to each other, and a third surface and a fourth surface facing opposite to each other. and a second battery module having a surface. The positions of the plurality of first exhaust ports arranged on the first surface and the positions of the plurality of second exhaust ports arranged on the second surface are on a projection plane parallel to the first surface and the second surface. Differently, on a projection plane parallel to the third and fourth planes, 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 , when the first surface and the third surface are made to correspond, 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 In the case of matching, the positions of the plurality of second exhaust ports and the positions of the plurality of fourth exhaust ports are common, and the first storage battery module and the second storage battery module are arranged with the second surface and the third surface facing each other. modules are arranged.

Another aspect of the present disclosure is also an assembled battery. The assembled battery includes a first battery module having first and second surfaces facing away from each other, and a second battery module having third and fourth surfaces facing away from each other. The plurality of first air outlets arranged on the first surface and the plurality of second air outlets arranged on the second surface are arranged in the lower portion of the first storage battery module, and the plurality of air outlets arranged on the third surface. The third exhaust port and the plurality of fourth exhaust ports disposed on the fourth surface are disposed on the upper portion of the second storage battery module, and the second surface and the fourth surface are opposed to each other such that the first storage battery module and the fourth exhaust port are arranged. 2 accumulator modules are arranged side by side.

According to the present disclosure, it is possible to reduce the influence of gas discharged from one battery module on other battery modules.

1 is a perspective view showing the structure of a storage battery module according to Example 1. FIG. FIG. 2 is an exploded perspective view showing the structure of the storage battery module of FIG. 1; FIG. 2 is another exploded perspective view showing the structure of the storage battery module of FIG. 1; FIG. 2 is a cross-sectional view showing the structure of the storage battery module of FIG. 1; FIG. 2 is another cross-sectional view showing the structure of the storage battery module of FIG. 1; 6(a) and 6(b) are diagrams showing an outline of gas discharge in the storage battery module of FIG. 1. FIG. 7A to 7C are diagrams showing the outline of the structure of the storage battery module according to the first embodiment. 8A to 8C are diagrams showing the structure of the assembled battery according to Example 1. FIG. 9A to 9D are diagrams showing another structure of the assembled battery according to Example 1. FIG. 10(a)-(c) are diagrams showing the outline of the structure of the storage battery module according to the second embodiment. 11(a)-(c) are diagrams showing the structure of an assembled battery according to Example 2. FIG. FIGS. 12(a) to 12(f) are diagrams showing another structure of the assembled battery according to Example 2. FIG.

(Example 1)
Before specifically describing the embodiments of the present disclosure, an overview of the embodiments will be described. The present embodiment relates to an assembled battery including a plurality of storage battery modules each housing a plurality of storage battery cells. In the storage battery module, each storage battery cell has a structure in which the positive electrode and the negative electrode face opposite to each other, for example, the positive electrodes are arranged in 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. In addition, although the pressure inside the storage battery cell increases due to the generation of gas, the safety mechanism releases the gas from the positive electrode side to the outside of the storage battery cell. Such gas is of high temperature and high pressure, and when combustion occurs due to the gas, other storage battery cells in the storage battery module also undergo thermal runaway (fire spreads). This spread of fire may burn the entire storage battery module or the entire product. In order to suppress the spread of fire due to the gas, a space is provided between the structure of the storage battery and the surfaces of the plurality of storage battery cells on the positive electrode side, and the space is connected to an exhaust port. High-temperature gas from the storage battery cells is released into the space and out of the storage battery module through the exhaust port.

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, the spread of fire due to the 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, it becomes easier for air to flow into the space from outside the storage battery module, and high-temperature combustion by gas tends to occur. Therefore, a relationship between the space in the structure and the exhaust port is required to suppress high-temperature combustion by gas. In the storage battery module according to this embodiment, one air outlet is connected to one space. Therefore, when one space is formed in the structure, one exhaust port is provided in the structure. Moreover, 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 candle wick is known to have an incomplete combustion of about 600°C and the flame tip to a temperature of over about 1000°C.

An 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 another storage battery module from the exhaust port of another storage battery module installed nearby, the internal storage battery cells are heated, and the other storage battery module is heated. storage battery modules may experience thermal runaway. 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 two adjacent storage battery modules are provided at alternate positions vertically and horizontally. Such a structure makes it difficult for the gas discharged from one storage battery module to directly flow into another adjacent storage battery module. Moreover, even if the gas flows into another adjacent storage battery module, the gas is cooled by moving the fixed distance, so the risk of fire spreading is reduced. In the following description, "parallel" and "perpendicular" include not only perfectly parallel and perpendicular, but also deviate from parallel and perpendicular within a margin of error. Moreover, "substantially" means that they are the same within 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 Battery Assembly 3000 FIG. 1 is a perspective view showing the structure of the storage battery module 1000. As shown in FIG. As shown in FIG. 1, a Cartesian coordinate system is defined that includes x, y, and z axes. The x-axis and y-axis are orthogonal to each other within 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 . Also, the positive directions of the x-axis, y-axis, and z-axis are defined in the directions of the arrows in FIG. 1, and the negative directions are defined in directions opposite to the arrows. The positive direction of the x-axis is the "front side" or "front side", the negative direction of the x-axis is the "rear side" or "back side", and the positive direction of the z-axis is the "upper side" or "top side". , and the negative direction side of the z-axis is also called the “lower side” or the “bottom side”. Furthermore, the positive side of the y-axis is sometimes called the "right side", and the negative side of the y-axis is sometimes called the "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 surface 112 , a front lower surface 114 , a front upper surface 116 , a first front exhaust port 118 a to a fourth front exhaust port 118 d collectively referred to as a front exhaust port 118 , and a left side surface 150 . Rear housing 130 includes a rear surface 132 , a rear lower surface 134 , a rear upper surface 136 and a right side 152 . Components of the front housing 110 and the rear housing 130 are connected by screws, welding, adhesives, or the like, but a known technique may be used, so the description is omitted here.

A front surface 112 of the front housing 110 has a rectangular plate shape extending on the yz plane. A front lower surface 114 extends rearward from the lower end of the front surface 112 , a front upper surface 116 extends rearward from the upper end of the front surface 112 , and a left side surface 150 extends rearward from the left end of the front surface 112 . Extend. The front lower surface 114, the front upper surface 116, and the left side surface 150 all have a plate shape. The plate shape may be rectangular. A rear surface 132 of the rear housing 130 has a rectangular plate shape extending on the yz plane. A rear lower surface 134 extends forward from the lower end of the rear surface 132 , a rear upper surface 136 extends forward from the upper end of the rear surface 132 , and a right side 152 extends forward from the right end of the rear surface 132 . . Each of the rear lower surface 134, the rear upper surface 136, and the right side surface 152 has 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. In addition, the front end of the front upper surface 116 and the front end of the rear upper surface 136 are connected, so that the front upper surface 116 and the rear upper surface 136 form one upper surface. The lower and upper surfaces intersect the anterior surface 112 and the posterior surface 132 . By connecting the front housing 110 and the rear housing 130 in this way, the structure 100 has a box shape. At this time, the right side of the structure 100 is covered with the right side 152 and the right lid 352, and the left side of the structure 100 is covered with the left side 150 and the left lid (not shown). Hereinafter, the front surface 112 may be referred to as the first surface, the rear surface 132 may be referred to as the second surface, the bottom surface may be referred to as the third surface, and the top surface may be referred to as the fourth surface. Here, the front housing 110 and the rear housing 130 are made of a material with high thermal conductivity, such as 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 metal plates, for example.

The structure of such a storage battery module 1000 is further described below with reference to FIGS. 2 to 5. FIG. FIG. 2 is an exploded perspective view showing the structure of the storage battery module 1000. FIG. FIG. 3 is another exploded perspective view showing the structure of the storage battery module 1000, showing the structure further disassembled from FIG. FIG. 4 is a cross-sectional view showing the structure of the storage battery module 1000, taken along line A-A' 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 line B-B' in FIG.

A combination of a front case 240 and a rear case 250 is accommodated between the front case 110 and the rear case 130 . A combination of the front case 240 and the rear case 250 has a hollow box shape and is made 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, a first storage battery assembly 200a to a seventh storage battery assembly 200g and a battery holder 230, collectively referred to as a storage battery assembly 200, are accommodated. In particular, the first battery assembly 200a, the second battery assembly 200b, . . . , the sixth battery assembly 200f, and the seventh battery assembly 200g are arranged in order from left to right. Therefore, it can be said that the lower surface and the upper surface face each other with the storage battery assembly 200 interposed therebetween. 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 technology may be used for the storage battery cell 210, and a safety mechanism is provided to release high-temperature, high-pressure gas to the outside when internal pressure rises due to an internal short circuit or the like. Generally, the high temperature and high pressure gas is released 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 face the positive electrode 212 forward, The negative electrode 214 faces the rear side. Moreover, 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 have the positive electrodes 212 facing rearward and the negative electrodes 214 facing frontward. In other words, the direction of the positive electrode 212 is the same within one storage battery assembly 200, but the direction of the positive electrode 212 is opposite between two adjacent storage battery assemblies 200. FIG. When the electrode on the front side facing the front surface 112 is called a "first electrode" and the electrode on the rear side facing the rear surface 132 is called a "second electrode", in the first storage battery assembly 200a and the like, the first electrode The electrode is the positive electrode 212 and the second electrode is the negative electrode 214 . In addition, in the second storage battery assembly 200 b and the like, the first electrode is the negative electrode 214 and the second electrode is the positive electrode 212 .

Battery holder 230 fixes the position of each of the plurality of storage battery cells 210 by providing through holes into which each of the plurality of storage battery cells 210 can be inserted. 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. A first front partition wall 242a is provided on the front surface of the front case plate portion 244 at the boundary between the second battery assembly 200b and the third battery assembly 200c. A second front partition wall 242b is provided at the boundary between the fourth battery assembly 200d and the fifth battery assembly 200e, and the boundary between the sixth battery assembly 200f and the seventh battery assembly 200g. is provided with a third front partition wall 242c. The first to third front partition walls 242a to 242c are collectively referred to as a front partition wall 242, and the front partition wall 242 protrudes forward and extends vertically.

The front surface of the front case plate portion 244 is divided into first front concave portions 246a to fourth front concave portions 246d by first front partition walls 242a to third front partition walls 242c. For example, the second front concave portion 246b is located between the first front partition wall 242a and the second front partition wall 242b, that is, the position facing the third battery assembly 200c and the fourth battery assembly 200d. The first front recess 246a and the third front recess 246c are similar to the second front recess 246b. On the other hand, since the fourth front recess 246d is arranged at a position facing only the seventh battery assembly 200g, it is narrower than the first front recess 246a to the third front recess 246c. Such first to fourth front recesses 246 a to 246 d 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. A third front lead plate 300c is fitted into the third front recess 246c, and a fourth front lead plate 300d is fitted into the fourth front recess 246d. First front lead plate 300a to fourth front lead plate 300d are collectively referred to as front lead plate 300, and front lead plate 300 has a plate shape. The first front lead plate 300a is connected to the positive electrodes 212 of the plurality of storage battery cells 210 of the first storage battery assembly 200a and the negative electrodes 214 of the plurality of storage battery cells 210 of the second storage battery assembly 200b. A wiring pattern that electrically connects one positive electrode 212 and one negative electrode 214 is provided on the first front lead plate 300a. 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 that is connected to the positive electrode 212 . The second front lead plate 300b and the third front lead plate 300c are similar to the first front lead plate 300a. On the other hand, the fourth front lead plate 300d is connected only to the positive electrodes 212 of the plurality of battery cells 210 of the seventh battery assembly 200g. 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. be done. As shown in FIG. 5, on the rear surface of the rear case plate portion 254, a first rear partition wall 252a is located at the boundary between the first battery assembly 200a and the second battery assembly 200b. is provided. A second rear partition wall 252b is provided at the boundary between the third battery assembly 200c and the fourth battery assembly 200d, and the boundary between the fifth battery assembly 200e and the sixth battery assembly 200f. A third rear partition wall 252c is provided at the position. The first rear partition 252a to the third rear partition 252c are collectively called a rear partition 252, and the rear partition 252 protrudes rearward and extends vertically.

The rear surface of the rear case plate portion 254 is divided into first rear concave portions 256a to fourth rear concave portions 256d by the first rear partition wall 252a to the third rear partition wall 252c. For example, the second rear recess 256b is arranged at a portion sandwiched between the first rear partition 252a and the second rear partition 252b, that is, at a position facing the second battery assembly 200b and the third battery assembly 200c. be done. The third rear recess 256c and the fourth rear recess 256d are similar to the second rear recess 256b. On the other hand, since the first rear recess 256a is arranged at a position facing only the first battery assembly 200a, the distance from the second rear recess 256b to the fourth rear recess 256d is narrower. Such first to fourth rear recesses 256a to 256d are collectively referred to as rear recesses 256. As shown in FIG.

A first rear lead plate 302a is fitted into the first rear recess 256a, and a second rear lead plate 302b is fitted into the second rear recess 256b. A third rear lead plate 302c is fitted into the third rear recess 256c, and a 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 electrodes 212 of the plurality of storage battery cells 210 of the second storage battery assembly 200b and the negative electrodes 214 of the plurality of storage battery cells 210 of the third storage battery assembly 200c. A wiring pattern that electrically connects one positive electrode 212 and one negative electrode 214 is provided on the second rear lead plate 302b. One battery cell 210 of the three battery assembly 200c is connected in series. Here, a through hole is provided in a portion of the second rear lead plate 302b that is connected to the positive electrode 212 . The third rear lead plate 302c and the fourth rear lead plate 302d are similar to 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 battery cells 210 of the first 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 front lead plate 300 and 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 case 240 and the rear case 250 that are combined while housing the storage battery assembly 200 . The control board tray 330 is a plate-shaped tray extending in the left-right direction. A control board 332 is arranged on the control board tray 330 . The control board 332 is equipped with an IC (Integrated Circuit) and the like, and controls the operation of the storage battery module 1000 . Like the control board tray 330 , the control board 332 has a plate shape extending in the horizontal direction, but is smaller than the control board tray 330 . A 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 matching the control board tray 330 .

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

As shown in FIG. 2, the combination of the front case 240 and the rear 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 housing 110 as described above. and the rear housing 130 . As a result, as shown in FIG. 4, a front space 400 (third front space 400c) surrounded by front surface 112, front lower surface 114, front upper surface 116, and front lead plate 300 (third front lead plate 300c) is formed. be. Here, the third front lead plate 300c corresponds to the surfaces of the fifth battery assembly 200e and the sixth battery assembly 200f on the first electrode side. In the third front space 400c, a portion of the front surface 112 located on the lower surface side than the storage battery cells 210 on the lower surface side end of the fifth battery assembly 200e and the sixth 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 surface 112 portion or the front lower surface 114, and can also be said to be an opening.

A rear space 410 (third rear space 410c) 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) is formed. Here, the third rear lead plate 302c corresponds to the surfaces of the fourth battery assembly 200d and the fifth battery assembly 200e on the side of the plurality of second electrodes. In the third rear space 410c, a portion of the rear surface 132 located on the lower surface side of the battery cell 210 at the end of the lower surface of the fourth battery assembly 200d and the fifth battery assembly 200e, or the rear lower surface 134, has a Two rear exhaust ports 138b (FIG. 2) are provided. The second rear exhaust port 138b is a through hole formed in a portion of the rear surface 132 or the rear lower surface 134. As shown in FIG.

The front space 400 and the rear space 410 will be explained in more detail using FIG. divided into Therefore, it can be said that the front partition wall 242 partitions the adjacent front spaces 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 400 a to the third front space 400 c are arranged to face two battery assemblies 200 , but the fourth front space 400 d is arranged to correspond to only one battery assembly 200 . Therefore, the volume of the fourth front space 400d is smaller than the volume of each of the first to third front spaces 400a to 400c. Also, 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 rear space 410 is divided into a first rear space 410a to a fourth rear space 410d by the first rear partition 252a to the third rear partition 252c. Therefore, it can be said that the rear partition wall 252 partitions the adjacent rear spaces 410 . The first rear space 410a to the fourth rear space 410d are arranged side by side in the horizontal direction. In particular, the second rear space 410 b to the fourth rear space 410 d are arranged to face two battery assemblies 200 , while the first rear space 410 a is arranged to correspond to only one battery assembly 200 . Therefore, the volume of the first rear space 410a is smaller than the volume of each of the second rear space 410b to the fourth rear space 410d. In addition, one rear exhaust port 138 is provided in each lower portion of the second rear space 410b to the fourth rear space 410d.

6A and 6B show an outline of gas discharge in the storage battery module 1000. FIG. FIG. 6(a) is a cross-sectional view schematically showing the structure of the storage battery module 1000, and is a cross-sectional view taken in the same direction as in FIG. Here, as an example, the first storage battery cell 210a to the eighth storage battery cell 210h are arranged from bottom to top. 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 due to an internal short circuit or the like in the third storage battery cell 210c, the third storage battery cell 210c releases high-temperature, high-pressure gas 500 from the positive electrode 212 side into the front space 400 via the front case 240 and the front lead plate 300. Gas 500 released into front space 400 contacts front surface 112 . Since the front surface 112 is a metal plate, it absorbs heat from the gas 500 in contact with it and releases the heat to the outside of the storage battery module 1000 . Thus, the gas 500 loses heat and is cooled by contact with the front surface 112 . Also, since the cooled gas 500 is diffused within the front space 400, the pressure of the gas 500 is reduced. Furthermore, the gas 500 whose temperature and pressure have been lowered is discharged to the outside of the storage battery module 1000 from the front side exhaust port 118 provided below the front space 400 .

With such a flow of gas 500, even if sparks are generated when the gas 500 is discharged from the third storage battery cell 210c, the gas is cooled, diffused, and discharged, so high-temperature combustion is less likely to occur. Here, the volume of the fourth front space 400d is smaller than the volume of each of the first to third front spaces 400a to 400c. Therefore, gas 500 released from storage battery cell 210 tends to cause the pressure in fourth front space 400d to be higher than other pressures. 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. As shown in FIG. In this embodiment, the fourth front exhaust port 118d provided in the fourth front space 400d is made larger than the other front exhaust ports 118 in order to prevent damage to the third front partition wall 242c. This suppresses an increase in pressure in the fourth front space 400d. That is, the area of the front exhaust port 118 is increased as the size of the front space 400 is decreased.

If the front exhaust port 118 is provided in the front upper surface 116, air may flow in from the lower part of the front space 400 that is not completely sealed. Since the inflowing air is discharged from the front exhaust port 118, an air flow is generated in the front space 400 from the bottom to the top. Such air flow feeds the spark with air, thereby facilitating high temperature combustion. In the rear space 410 as well, the gas 500 is cooled, diffused, and released in the same manner as in the front space 400 .

6(b) is a cross-sectional view schematically showing the structure of a storage battery module 2000 to be compared with the storage battery module 1000 of FIG. 6(a), and is a cross-sectional view in the same direction as that of FIG. 6(a). Front surface 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), from the front surface 112 to the front upper surface 116, from the rear surface 132 to the rear upper surface 136, from the storage battery assembly 200 to the negative electrode 214, the front case 240, the rear case 250, the front lead plate 300, the rear lead plate 302 , the front space 400 and the rear space 410 . Here, a front exhaust port 2118 is provided in a portion of the front surface 2112 in contact with the front space 400 that faces the positive electrode 2212 of the first storage battery cell 2210a.

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

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

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

The first storage battery module 1000a has a first surface 1110 and a second surface 1120 facing opposite to each other, and an upper surface 1150 and a lower surface 1160 sandwiched between the first surface 1110 and the second surface 1120. As shown in FIG. A first surface 1110 corresponds to the anterior surface 112 of FIG. 1, a second surface 1120 corresponds to the posterior surface 132 of FIG. 1160 corresponds to the combination of front lower surface 114 and rear lower surface 134 of FIG. In addition, 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 outlets 1210 correspond to the plurality of front outlets 118 in FIG. 2, and the plurality of second outlets 1220 correspond to the plurality of rear outlets 138 in FIG. Here, the positions of the plurality of first exhaust ports 1210 and the positions of the plurality of second exhaust ports 1220 on a projection plane parallel to the first surface 1110 and the second surface 1120, that is, on the yz plane. different.

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

When the first surface 1110 and the third surface 1130 are made to correspond, 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, 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 with the second surface 1120 and the third surface 1130 facing each other. By being arranged in this manner, the positive terminal 1050 of the first battery module 1000a and the positive terminal 1060 of the second battery module 1000b face the same direction. Also, the negative terminal 1052 of the first battery module 1000a and the negative terminal 1062 of the second battery module 1000b face the same direction. Here, by electrically connecting the positive terminal 1050 and the positive terminal 1060 and electrically connecting the negative terminal 1052 and the negative terminal 1062, the first storage battery module 1000a and the second storage battery module 1000b are connected in parallel. Connected. Also, the second exhaust port 1220 on the second surface 1120 and the third exhaust port 1230 on the third surface 1130 are arranged without facing 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. FIG. Although the gas ejected from the third exhaust port 1230 is generally hot, the gas hits the second surface 1120 . The gas is cooled and diffused by hitting the second surface 1120 . Diffusion causes the gas to move along the second surface 1120, which further cools the gas. Therefore, even if gas flows into the first storage battery module 1000a from the second exhaust port 1220, the risk of fire spreading is reduced.

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

By being arranged in this manner, the positive terminal 1050 of the first battery module 1000a and the negative terminal 1062 of the second battery module 1000b face the same direction. Also, the negative terminal 1052 of the first battery module 1000a and the positive terminal 1060 of the second battery module 1000b face the same direction. Here, by electrically connecting the negative terminal 1052 and the positive terminal 1060, the first storage battery module 1000a and the second storage battery module 1000b are connected in series.

The first outlet 1210 and the second outlet 1220 are arranged in the lower part of the first battery module 1000a, while the third outlet 1230 and the fourth outlet 1240 are arranged in the upper part of the second battery module 1000b. 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 . Furthermore, 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. further cooled.

FIGS. 9(c)-(d) show the assembled battery 4000 to be compared with FIGS. 9(a)-(b), and are shown in the same manner as FIGS. 9(a)-(b). The assembled battery 4000 includes the same first storage battery module 1000a and second storage battery module 1000b as in FIGS. 9(a)-(b), but their arrangement differs from that in FIGS. 9(a)-(b). The second storage battery module 1000b is arranged such that the fourth surface 1140 faces the second surface 1120, the upper surface 1170 faces upward, and the lower surface 1180 faces downward. Thus, the second battery module 1000b is inverted in the xy plane, but not upside down, relative to the arrangement in FIG. 8(a). Since the second exhaust port 1220 and the fourth exhaust port 1240 are arranged in this way, the gas discharged from the fourth exhaust port 1240 directly flows into the second exhaust port 1220 . Therefore, such 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, since the second surface 1120 and the third surface 1130 are opposed to each other, the air is discharged from the second storage battery module 1000b. It is possible to reduce the influence of the discharged gas on the first storage battery module 1000a. Moreover, even if the position of the second exhaust port 1220 and the position of the fourth exhaust port 1240 are common, the direction of the first storage battery module 1000a and the direction of the second storage battery module 1000b are changed. It is possible to reduce the influence of the discharged gas on the first storage battery module 1000a. 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.

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

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

Also, since the orientation of the positive electrode 212 is opposite in different assemblies, multiple assemblies can be formed according to the orientation of the plurality of storage battery cells 210 . In addition, 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 . Moreover, since one exhaust port is provided for each of the first space and the second space, the gas 500 can be sufficiently discharged. Moreover, since one exhaust port is provided for each of the first space and the second space, it is possible to suppress the inflow of air into the first space and the second space. Also, since the front surface 112 and the rear surface 132 are metal plates, the gas 500 can be cooled.

A summary of one aspect of the present disclosure is as follows. The assembled battery (3000) of one aspect of the present disclosure includes a first battery module (1000a) having a first side (1110) and a second side (1120) facing away from each other, and a third battery module (1000a) facing away from each other. A second battery module (1000b) having a face (1130) and a fourth face (1140). On a 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 positions of the second plane (1120) ), and arranged on the third plane (1130) on a projection plane parallel to the third plane (1130) and the fourth plane (1140). The positions of the plurality of third exhaust ports (1230) arranged on the fourth surface (1140) 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 (1130), 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 ( 1140), the positions of the plurality of second exhaust ports (1220) and the positions of the plurality of fourth exhaust ports (1240) are common, and the second surface (1120) and the third surface ( 1130) facing each other, the first storage battery module (1000a) and the second storage battery module (1000b) are arranged.

Another aspect of the present disclosure is also an assembled battery (3000). This assembled battery (3000) has a first storage battery module (1000a) having a first surface (1110) and a second surface (1120) facing opposite to each other, and a third surface (1130) facing opposite to each other. a second battery module (1000b) having a fourth side (1140). On a 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 positions of the second plane (1120) ), and arranged on the third plane (1130) on a projection plane parallel to the third plane (1130) and the fourth plane (1140). The positions of the plurality of third exhaust ports (1230) arranged on the fourth surface (1140) 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 (1130), 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 ( 1140), the positions of the plurality of second exhaust ports (1220) and the positions of the plurality of fourth exhaust ports (1240) are common, and the second surface (1120) and the fourth surface ( 1140) facing each other and parallel to the second surface (1120) and the fourth surface (1140), the direction of the first battery module (1000a) and the direction of the second battery module (1000b) , the first storage battery module (1000a) and the second storage battery module (1000b) are arranged side by side.

A plurality of first air outlets (1210) are arranged in a lower portion of the first surface (1110), a plurality of second air outlets (1220) are arranged in a lower portion of the second surface (1120), and a plurality of A third outlet (1230) is located in the lower portion of the third surface (1130) and a plurality of fourth outlets (1240) are located in the lower portion of the fourth surface (1140).

(Example 2)
Next, Example 2 will be described. Example 2, like Example 1, relates to an assembled battery including a plurality of storage battery modules each housing a plurality of storage battery cells. In Example 1, the outlet of each battery module is arranged only in the lower part, whereas in Example 2, the outlet of each battery module is arranged in the upper part and the lower part. In the following, we will focus on the differences from the past.

10(a)-(c) show an overview of the structure of the storage battery module 1500. FIG. FIGS. 10(a)-(c) are shown as FIGS. 7(a)-(c). 10(a) shows an overview from the front side of the storage battery module 1500, FIG. 10(b) shows an overview from the right side of the storage battery module 1500, and FIG. 10(c) shows an overview from the rear side of the storage battery module 1500. provides an overview of In the storage battery module 1500, unlike the storage battery module 1000, the directions of the positive electrode 212 and the negative electrode 214 are different between the upper stage and the lower stage. An upper exhaust port 1510 or an upper exhaust port 1520 is arranged above the upper positive electrode 212 , and a lower exhaust port 1512 or a lower exhaust port 1522 is arranged below the lower positive electrode 212 . Furthermore, a positive terminal is provided at the right end of the storage battery module 1500 and a negative terminal is provided at the left end of the storage battery module 1500 .

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

The first storage battery module 1500a has a first surface 1610 and a second surface 1620 facing opposite to each other, and 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 air outlets 1710 are arranged in an upper portion of the first surface 1610 , and a plurality of first lower air outlets 1712 are arranged in a lower portion of the first surface 1610 . A plurality of second upper air outlets 1720 are arranged in an upper portion of the second surface 1620 , and a plurality of second lower air outlets 1722 are arranged in a lower portion of the second surface 1620 . The plurality of first upper air outlets 1710 correspond to the plurality of upper air outlets 1510 in FIG. 10(a), and the plurality of first lower air outlets 1712 correspond to the plurality of lower air outlets 1512 in FIG. 10(a). corresponds to The plurality of second upper air outlets 1720 correspond to the plurality of upper air outlets 1520 in FIG. 10(c), and the plurality of second lower air outlets 1722 correspond to the plurality of lower air outlets 1522 in FIG. 10(c). corresponds to Here, on a projection plane parallel to the first plane 1610 and the second plane 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 different from Also, the positions of the plurality of first lower exhaust ports 1712 and the positions of the plurality of second lower exhaust ports 1722 are different.

The second storage battery module 1500b has a third surface 1630 and a fourth surface 1640 facing opposite to each other, and 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 air outlets 1730 are arranged in an upper portion of the third surface 1630 , and a plurality of third lower air outlets 1732 are arranged in a lower portion of the third surface 1630 . A plurality of fourth upper exhaust ports 1740 are arranged in an upper portion of the fourth surface 1640 , and a plurality of fourth lower exhaust ports 1742 are arranged in a lower portion of the fourth surface 1640 . The plurality of third upper air outlets 1730 correspond to the plurality of upper air outlets 1510 in FIG. 10(a), and the plurality of third lower air outlets 1732 correspond to the plurality of lower air outlets 1512 in FIG. 10(a). corresponds to The plurality of fourth upper air outlets 1740 correspond to the plurality of upper air outlets 1520 in FIG. 10(c), and the plurality of fourth lower air outlets 1742 correspond to the plurality of lower air outlets 1522 in FIG. 10(c). corresponds to Here, the positions of the plurality of third upper air outlets 1730 and the positions of the plurality of fourth upper air outlets 1740 on the projection plane parallel to the third plane 1630 and the fourth plane 1640, that is, on the yz plane. different from 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 made to correspond, 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. 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 made to correspond, 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 being arranged in this way, the positive terminal 1550 of the first battery module 1500a and the positive terminal 1560 of the second battery module 1500b face the same direction. Also, the negative terminal 1552 of the first battery module 1500a and the negative terminal 1562 of the second battery module 1500b face the same direction. Here, by electrically connecting the positive terminal 1550 and the positive terminal 1560 and electrically connecting the negative terminal 1552 and the negative terminal 1562, the first storage battery module 1500a and the second storage battery module 1500b are connected in parallel. Connected. Also, 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 without facing 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 without facing each other.

12(a)-(f) show another structure of the assembled battery 3000. FIG. FIG. 12(a) is a perspective view showing the structure of the assembled battery 3000. FIG. 12(b) and (c) are top views of the assembled battery 3000. FIG. 12(b) mainly shows the structure of the upper part of the assembled battery 3000, and FIG. 12(c) shows the assembled battery 3000. The structure on the lower side is mainly shown. 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 in FIGS. is different. The first storage battery module 1500a is arranged in the same manner as in FIG. 11(a), but the second storage battery module 1500b has the fourth surface 1640 facing the second surface 1620, the lower surface 1680 facing upward, and the upper surface 1670 is placed downward. Thus, the second storage battery module 1500b is inverted in the xy plane and upside down with respect to the arrangement in FIG. 11(a). As a result, the first storage battery module 1500a and the second storage battery module 1500b are arranged in opposite directions on a projection plane parallel to the second plane 1620 and the fourth plane 1640 .

By being arranged in this manner, the positive terminal 1550 of the first battery module 1500a and the negative terminal 1562 of the second battery module 1500b face the same direction. Also, the negative terminal 1552 of the first battery module 1500a and the positive terminal 1560 of the second battery module 1500b face the same direction. Here, by electrically connecting the negative terminal 1552 and the positive terminal 1560, the first storage battery module 1500a and the second storage battery module 1500b are connected in series.

A first upper exhaust port 1710 and a second upper exhaust port 1720 are disposed in the upper portion of the first battery module 1500a, and a fourth lower exhaust port 1742 and a third lower exhaust port 1732 are disposed in the second battery module 1500b. 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 .

A first lower exhaust port 1712 and a second lower exhaust port 1722 are disposed in the lower portion of the first battery module 1500a, and a third upper exhaust port 1730 and a fourth upper exhaust port 1740 are disposed in the second battery module 1500a. Located in the lower portion of 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 .

FIGS. 12(c)-(d) show an assembled battery 4000 to be compared with FIGS. 12(a)-(b), and are shown in the same manner as FIGS. 12(a)-(b). The assembled battery 4000 includes the same first storage battery module 1500a and second storage battery module 1500b as shown in FIGS. 9(a)-(b), but their arrangement differs from that shown in FIGS. 12(a)-(b). The second storage battery module 1500b is arranged with the fourth surface 1640 facing the second surface 1620, the upper surface 1670 facing upward, and the lower surface 1680 facing downward. Thus, the second battery module 1500b is flipped in the xy plane, but not upside down, relative to the arrangement in FIG. 11(a). By being arranged in this manner, 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 . . Also, 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 arrangement is not preferable.

According to this embodiment, when the positions of the second exhaust ports (1720, 1722) are different from the positions of the third exhaust ports (1730, 1732), the second surface 1620 and the third surface 1630 are made to face each other. Therefore, the influence of the gas discharged from the second battery module 1500b on the first battery module 1500a can be reduced. Further, even if the positions of the second exhaust ports (1720, 1722) and the positions of the fourth exhaust ports (1740, 1742) are common, 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 battery module 1500b on the first battery module 1500a can be reduced. In addition, since the first exhaust ports (1710, 1712) to the fourth exhaust ports (1740, 1742) are arranged in the upper and lower portions of each surface, the gas can be discharged efficiently.

A summary of one aspect of the present disclosure is as follows. A summary of one aspect of the present disclosure is as follows. The assembled battery (3000) of one aspect of the present disclosure includes a first battery module (1500a) having a first side (1610) and a second side (1620) facing away from each other, and a third battery module (1500a) facing away from each other. A second battery module (1500b) having a face (1630) and a fourth face (1640). Positions of the plurality of first exhaust ports (1710, 1712) arranged on the first plane (1610) and the second plane on a projection plane parallel to the first plane (1610) and the second plane (1620) The positions of the plurality of second exhaust ports (1720, 1722) arranged in (1620) are different, and on the projection plane parallel to the third plane (1630) and the fourth plane (1640), the third plane ( 1630), and the positions of the plurality of fourth exhaust ports (1740, 1742) located on the fourth surface (1640) are different. When the surface (1610) and the third surface (1630) are made to correspond, 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. are common, and the first storage battery module (1500a) and the second storage battery module (1500b) are arranged with the second surface (1620) and the third surface (1630) facing each other.

Another aspect of the present disclosure is also an assembled battery (3000). This assembled battery (3000) has a first storage battery module (1500a) having a first side (1610) and a second side (1620) facing opposite to each other, and a third side (1630) facing opposite to each other. a second battery module (1500b) having a fourth side (1640). Positions of the plurality of first exhaust ports (1710, 1712) arranged on the first plane (1610) and the second plane on a projection plane parallel to the first plane (1610) and the second plane (1620) The positions of the plurality of second exhaust ports (1720, 1722) arranged in (1620) are different, and on the projection plane parallel to the third plane (1630) and the fourth plane (1640), the third plane ( 1630), and the positions of the plurality of fourth exhaust ports (1740, 1742) located on the fourth surface (1640) are different. When the surface (1610) and the third surface (1630) are made to correspond, 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, the second surface (1620) and the fourth surface (1640) face each other, and on a projection plane parallel to the second surface (1620) and the fourth surface (1640), the first storage battery module The first storage battery module (1500a) and the second storage battery module (1500b) are arranged by changing the orientation of (1500a) and the orientation of the second storage battery module (1500b).

A plurality of first outlets (1710, 1712) are disposed in upper and lower portions of the first surface (1610) and a plurality of second outlets (1720, 1722) are disposed in an upper portion of the second surface (1620). and lower portions, a plurality of third air outlets (1730, 1732) are arranged in upper and lower portions of the third surface (1630), and a plurality of fourth air outlets (1740, 1742) are arranged in the third surface (1630). Located in the upper and lower portions of the four sides (1640).

The present disclosure has been described above based on the embodiments. It should be understood by those skilled in the art that this embodiment is an example, and that various modifications are possible in the combination of each component or each treatment process, and such modifications are within the scope of the present disclosure. .

In Examples 1 and 2, the number of storage battery modules 1000 or storage battery modules 1500 included in the assembled battery 3000 is assumed to be "2". However, for example, the number of storage battery modules 1000 or 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 arrangement regularity in the first and second embodiments. According to this modified example, the degree of freedom in configuration can be improved.

In Examples 1 and 2, a front space 400 and a rear space 410 are formed. However, 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 facing the same direction, a space suitable for 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 as well.

In Examples 1 and 2, the front partition wall 242 and the rear partition wall 252 are made of resin or the like. However, not limited to this, for example, the front side partition 242 and the rear side partition 252 formed of resin or the like may be reinforced with 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 increases, the front partition wall 242 and the rear partition wall 252 are less likely to be damaged.

1000 storage battery module 1110 first surface 1120 second surface 1130 third surface 1140 fourth surface 1150 upper surface 1160 lower surface 1170 upper surface 1180 lower surface 1210 first exhaust port 1220 second exhaust port 1230 second surface 3 exhaust port, 1240 fourth exhaust port, 3000 assembled battery.

Claims (4)

a first battery module having a first side and a second side facing away from each other;
a second battery module having third and fourth faces facing away from each other;
Positions of a plurality of first exhaust ports arranged on the first surface and a plurality of second exhaust ports arranged on the second surface on a projection plane parallel to the first surface and the second surface. is different from the position of
Positions of a plurality of third exhaust ports arranged on the third surface and a plurality of fourth exhaust ports arranged on the fourth surface on a projection plane parallel to the third surface and the fourth surface. is different from the position of
When the first surface and the third surface are made to correspond, 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 are made to correspond, 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 with the second surface and the third surface facing each other,
assembled battery. a first battery module having a first side and a second side facing away from each other;
a second battery module having third and fourth faces facing away from each other;
A plurality of first air outlets arranged on the first surface and a plurality of second air outlets arranged on the second surface are arranged on a lower portion of the first battery module and arranged on the third surface. a plurality of third outlets and a plurality of fourth outlets arranged on the fourth surface are arranged in an upper portion of the second storage battery module,
The first storage battery module and the second storage battery module are arranged with the second surface and the fourth surface facing each other,
assembled battery. The plurality of first exhaust ports are arranged only on a lower portion of the first surface,
The plurality of second exhaust ports are arranged only on the lower portion of the second surface,
The plurality of third exhaust ports are arranged only on a lower portion of the third surface,
the plurality of fourth outlets are disposed only on a lower portion of the fourth surface;
The assembled battery according to claim 1. the plurality of first air outlets are arranged in an upper portion and a lower portion of the first surface;
the plurality of second air outlets are arranged in an upper portion and a lower portion of the second surface;
the plurality of third air outlets are arranged in an upper portion and a lower portion of the third surface;
the plurality of fourth air outlets are arranged in an upper portion and a lower portion of the fourth surface;
The assembled battery according to claim 1.

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