Battery module and vehicle

Abstract

The utility model provides a battery module and a vehicle, and relates to the technical field of battery processing. The battery module comprises battery cell assemblies, the battery cell assemblies comprise first battery cell assemblies and second battery cell assemblies which are alternately distributed in the first direction, the first battery cell assemblies are electrically connected with the adjacent second battery cell assemblies, each first battery cell assembly comprises at least two first battery cells, and the at least two first battery cells are sequentially distributed in the first direction and electrically connected; the second battery cell assembly comprises at least two second battery cells, the at least two second battery cells are sequentially distributed in the second direction and are electrically connected, and the second direction is perpendicular to the first direction and the height direction of the second battery cells. The arrangement mode of the battery cells in the battery module can effectively reduce the risk of thermal runaway, the cost is low, and the feasibility is high.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing, and more specifically, to a battery module and a vehicle. Background Art

[0002] With the rapid development of the new energy industry, many commercial vehicles have started using lithium batteries as power, especially in the heavy truck industry, where the share of new energy heavy trucks is increasing continuously. Due to the large load capacity of heavy trucks, in order to ensure the endurance requirement, large-capacity batteries need to be carried. The energy density of traditional lithium iron phosphate batteries is relatively small, so it is necessary to increase the battery layout space. Therefore, some battery enterprises consider using ternary batteries with higher energy density to increase the system power as much as possible under the condition of unchanged layout space.

[0003] Due to the high energy density of ternary batteries, the internal reaction is relatively active during thermal runaway, so there are certain potential safety hazards. To reduce this risk, industry designers provide various protections as much as possible during battery layout. Although this method can achieve certain effects, the cost brought is also relatively high. How to improve the safety of the battery module as much as possible at low cost is a common concern in the industry. Summary of the Utility Model

[0004] The purpose of the present application is to provide a battery module and a vehicle, which reduce the risk of thermal runaway by changing the arrangement of battery cells, with low cost and high feasibility, aiming at the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] On the one hand, an embodiment of the present application provides a battery module, including: a battery cell assembly, the battery cell assembly includes a first battery cell assembly and a second battery cell assembly alternately distributed along a first direction, the first battery cell assembly is electrically connected to the adjacent second battery cell assembly, the first battery cell assembly includes at least two first battery cells, at least two first battery cells are sequentially distributed and electrically connected along the first direction, the second battery cell assembly includes at least two second battery cells, and at least two second battery cells are sequentially distributed and electrically connected along a second direction, and the second direction is perpendicular to the first direction and the height direction of the second battery cell.

[0007] Optionally, it further includes a cover plate, the cover plate covers the top of the battery cell assembly, the surface of the cover plate facing away from the first battery cell and the second battery cell is a convex arc surface, and a plurality of pressure relief grooves are provided on the convex arc surface, and the plurality of pressure relief grooves respectively correspond to the explosion-proof valves of the first battery cell or the second battery cell.

[0008] Optionally, a liquid collecting groove is further provided on the cover plate, and the liquid collecting groove is used for collecting the electrolyte flowing out of the pressure relief grooves.

[0009] Optionally, the first battery cell assembly further includes a first heat insulation buffer pad located between two adjacent first battery cells, the second battery cell assembly further includes a second heat insulation buffer pad located between two adjacent second battery cells, and a third heat insulation buffer pad is further provided between the first battery cell assembly and the second battery cell assembly.

[0010] Optionally, the second battery cell assembly and the first battery cell have equal dimensions in the second direction.

[0011] Optionally, the first heat insulation buffer pad, the second heat insulation buffer pad, and the third heat insulation buffer pad are all provided with honeycomb holes. The first heat insulation buffer pad and the third heat insulation buffer pad achieve air circulation with the outside through the honeycomb holes, and the second heat insulation buffer pad and the third heat insulation buffer pad achieve air circulation with each other through the honeycomb holes.

[0012] Optionally, it further includes a cover plate covering the tops of the first battery cell and the second battery cell. A first stud is provided on the top of the third heat insulation buffer pad, and a first through hole corresponding to the first stud is provided on the cover plate. The first stud passes through the first through hole and is matched with a first nut to fix the cover plate on the third heat insulation buffer pad.

[0013] Optionally, it further includes two end plates and a binding strap. The two end plates are respectively located on opposite sides of the battery cell assembly in the first direction. The binding strap surrounds the end plates and the battery cell assembly along the first direction and the second direction. A second through hole extending along the second direction is provided on the third heat insulation buffer pad, and third through holes respectively corresponding to the two ends of the second through hole are provided on the binding strap. A fixing screw passes through the third through hole, the second through hole, and another third through hole in sequence and is matched with a fixing nut to fix the binding strap on the third heat insulation buffer pad.

[0014] Optionally, it further includes a connecting tab. The connecting tab includes a first connecting portion and a second connecting portion connected to the first connecting portion. The first connecting portion is used to connect to the pole posts of at least two first battery cells in the first battery cell assembly, and the second connecting portion is used to connect to the pole posts of at least two second battery cells in the second battery cell assembly.

[0015] On the other hand, an embodiment of the present application provides a vehicle including the battery module as described in any one of the above.

[0016] The beneficial effects of the present application include:

[0017] The present application provides a battery module, including: a battery cell assembly, which includes a first battery cell assembly and a second battery cell assembly alternately distributed in a first direction. The first battery cell assembly is electrically connected to the adjacent second battery cell assembly. The first battery cell assembly includes at least two first battery cells, and the at least two first battery cells are sequentially distributed and electrically connected in the first direction. The second battery cell assembly includes at least two second battery cells, and the at least two second battery cells are sequentially distributed and electrically connected in a second direction, and the second direction is perpendicular to the first direction and the height direction of the second battery cell. In this battery module, the first battery cells are connected in parallel in a back-to-back (large surface to large surface) manner to form a plurality of first battery cell assemblies, and the second battery cells are also connected in parallel in a back-to-back (large surface to large surface) manner to form a plurality of second battery cell assemblies. Then, a plurality of first battery cell assemblies and second battery cell assemblies are connected together in a back-to-back side (the large surface of the first battery cell against the small surface of the second battery cell) manner to form a battery cell assembly. After a single battery cell undergoes thermal runaway, heat can only be transferred on a large surface within its own sub-assembly (the first battery cell assembly or the second battery cell assembly), while outside the sub-assembly, one large surface faces N (at least two) small surfaces, and the heat received by a single small surface is only 1 / N, which will greatly reduce the probability of thermal runaway of the battery cells in the adjacent sub-assemblies. Therefore, the arrangement of the battery cells in the above battery module can effectively reduce the risk of thermal runaway, with low cost and high feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 One of the structural schematic diagrams of the battery module provided by the embodiment of the present application;

[0020] Figure 2 Another structural schematic diagram of the battery module provided by the embodiment of the present application;

[0021] Figure 3 is Figure 2 The partial enlarged schematic diagram at A in

[0022] Figure 4 The structural schematic diagram of the second heat insulation buffer pad and the third heat insulation buffer pad in the battery module provided by the embodiment of the present application;

[0023] Figure 5 is Figure 4 The partial enlarged schematic diagram at B in

[0024] Icons: 10 - battery module; 111 - first battery cell assembly; 1111 - first battery cell; 1112 - first heat insulation and buffer pad; 112 - second battery cell assembly; 1121 - second battery cell; 1122 - second heat insulation and buffer pad; 113 - explosion-proof valve; 13 - cover plate; 131 - convex arc surface; 132 - pressure relief groove; 133 - liquid collecting groove; 1331 - first liquid collecting groove; 1332 - second liquid collecting groove; 14 - third heat insulation and buffer pad; 141 - first stud; 142 - second through hole; 15 - honeycomb hole; 16 - first nut; 17 - end plate; 171 - second stud; 18 - strap; 19 - fixing screw; 20 - fixing nut; 21 - second nut; 22 - connecting tab; 221 - first connecting portion; 222 - second connecting portion; 23 - output tab; X - first direction; Y - second direction; Z - height direction. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and illustrated herein usually can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. It should be noted that, without conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the protection scope of the present application.

[0027] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this application is normally placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0030] On the one hand of the embodiments of the present application, please refer to Figure 1 , a battery module 10 is provided, including: a battery cell assembly, the battery cell assembly includes a first battery cell assembly 111 and a second battery cell assembly 112 that are alternately distributed along a first direction X, and the first battery cell assembly 111 is electrically connected to an adjacent second battery cell assembly 112. The first battery cell assembly 111 includes at least two first battery cells 1111, and at least two first battery cells 1111 are sequentially distributed and electrically connected along the first direction X. The second battery cell assembly 112 includes at least two second battery cells 1121, and at least two second battery cells 1121 are sequentially distributed and electrically connected along a second direction Y, and the second direction Y is perpendicular to the first direction X and the height direction Z of the second battery cell 1121.

[0031] It should be noted that the alternate distribution of the first battery cell assembly 111 and the second battery cell assembly 112 along the first direction X means that the first battery cell assembly 111 and the second battery cell assembly 112 are arranged in the manner of "first battery cell assembly 111 - second battery cell assembly 112 - first battery cell assembly 111..." or "second battery cell assembly 112 - first battery cell assembly 111 - second battery cell assembly 112...". The adjacent first battery cell assembly 111 and second battery cell assembly 112 are in series or parallel. The first battery cells 1111 in the first battery cell assembly 111 are connected in parallel with each other, and the second battery cells 1121 in the second battery cell assembly 112 are also connected in parallel with each other.

[0032] Generally, the number of the first battery cells 1111 in the first battery cell assembly 111 is equal to the number of the second battery cells 1121 in the second battery cell assembly 112. When the first battery cells 1111 and the second battery cells 1121 are arranged, the tops of the pole posts and the explosion-proof valves 113 are arranged in the same direction.

[0033] When a single battery cell undergoes thermal runaway, its heat mainly diffuses to the surrounding battery cells through the large surface. Even if heat insulation materials are added between the large surfaces of the battery cells, this can only reduce the heat conduction, but cannot stop the heat transfer. If the large surfaces of adjacent battery cells are in contact, these heats will be sequentially transferred through the large surfaces, thereby causing a chain of battery cells to undergo thermal runaway.

[0034] In the above-mentioned battery module 10, the first battery cell 1111 is connected in parallel with a large surface against a large surface to form a plurality of first battery cell assemblies 111, and the second battery cell 1121 is also connected in parallel with a large surface against a large surface to form a plurality of second battery cell assemblies 112, and then the plurality of first battery cell assemblies 111 and the second battery cell assemblies 112 are connected together to form a battery cell assembly by means of a large surface against a small surface (the large surface of the first battery cell 1111 against the small surface of the second battery cell 1121). After a single battery cell has thermal runaway, it can only be transferred on a large surface within the small assembly (the first battery cell assembly 111 or the second battery cell assembly 112) in which it is located, while outside the small assembly, a large surface faces N (at least two) small surfaces, and the heat received by a single small surface is only 1 / N, which will greatly reduce the probability of thermal runaway of the battery cells in the adjacent small assembly. Therefore, the arrangement of the battery cells in the above-mentioned battery module 10 can effectively reduce the risk of thermal runaway, with low cost and high feasibility.

[0035] Optionally, see Figure 2 and Figure 3 The battery module 10 also includes a cover plate 13, which is arranged on the top of the battery cell assembly. The surface of the cover plate 13 facing away from the first battery cell 1111 and the second battery cell 1121 is a convex arc surface 131, and a plurality of pressure relief grooves 132 are arranged on the convex arc surface 131. The plurality of pressure relief grooves 132 correspond to the explosion-proof valves 113 of the first battery cell 1111 or the second battery cell 1121 respectively.

[0036] When the first battery cell 1111 and the second battery cell 1121 are arranged, the poles and the tops of the explosion-proof valves 113 are arranged to face the same direction. The cover plate 13 is simultaneously covered on the tops of all the first battery cells 1111 and the second battery cells 1121. The surface of the cover plate 13 that is away from the first battery cell 1111 and the second battery cell 1121 is a convex arc surface 131, and the middle of the convex arc surface 131 is high and the surroundings are low. A plurality of pressure relief grooves 132 are provided on the convex arc surface 131, and the number of the pressure relief grooves 132 is equal to the total number of the first battery cells 1111 and the second battery cells 1121 in the battery cell assembly, and each explosion-proof valve 113 on the top of the first battery cell 1111 and the second battery cell 1121 corresponds to a pressure relief groove 132.

[0037] After thermal runaway, the gas inside the first battery cell 1111 and the second battery cell 1121 will release some electrolyte after being released through the explosion-proof valve 113. After the electrolyte splashes to the top of the battery cell and accumulates into a flow, an external loop will be formed between the battery cell poles, thereby causing the battery cell to short-circuit, causing a large amount of heat to be generated inside the battery cell, and aggravating the thermal runaway process. A pressure relief groove 132 is set on the cover plate 13, and the electrolyte released from the explosion-proof valve 113 will enter the pressure relief groove 132. After accumulating in the pressure relief groove 132, it will flow along the convex arc surface 131 to the surrounding low-lying areas. This avoids the formation of an external loop between the battery cell poles, which causes a short circuit in the battery cell.

[0038] Optionally, a liquid collecting groove 133 is further provided on the cover plate 13, and the liquid collecting groove 133 is used to collect the electrolyte flowing out of the pressure relief groove 132.

[0039] Preferably, the liquid collecting groove 133 includes a first liquid collecting groove 1331 and a second liquid collecting groove 1332. The first liquid collecting groove 1331 is arranged around the edge of the convex arc surface 131, the second liquid collecting groove 1332 is arranged around the first liquid collecting groove 1331, and the second liquid collecting groove 1332 is located below the first liquid collecting groove 1331.

[0040] The first liquid collecting groove 1331 is arranged at the low-lying part of the convex arc surface 131. The electrolyte flowing out of the pressure relief groove 132 will flow along the convex arc surface 131 to the first liquid collecting groove 1331. After the electrolyte in the first liquid collecting groove 1331 is full and overflows, it can flow into the second liquid collecting groove 1332 along the peripheral side wall of the cover plate 13. Such an arrangement can prevent the electrolyte from splashing and contacting other components of the battery module 10, causing a short circuit of the battery cells, and can also reduce the risk of damage to other components of the battery module 10 by the electrolyte, thereby reducing losses.

[0041] Since the electrolyte needs to flow on the cover plate 13, optionally, the material of the cover plate 13 is a high-temperature resistant and corrosion-resistant insulating material.

[0042] To further reduce the risk of thermal runaway of the battery module 10, optionally, please refer to Figure 1 、 Figure 3 and Figure 4 , the first battery cell assembly 111 further includes a first heat insulation buffer pad 1112, the first heat insulation buffer pad 1112 is located between two adjacent first battery cells 1111, the second battery cell assembly 112 further includes a second heat insulation buffer pad 1122, the second heat insulation buffer pad 1122 is located between two adjacent second battery cells 1121, and a third heat insulation buffer pad 14 is further provided between the first battery cell assembly 111 and the second battery cell assembly 112.

[0043] The arrangement of the first heat insulation buffer pad 1112, the second heat insulation buffer pad 1122 and the third heat insulation buffer pad 14 makes there be no direct contact between the battery cells. In addition, the first heat insulation buffer pad 1112, the second heat insulation buffer pad 1122 and the third heat insulation buffer pad 14 not only have the heat insulation function, but also have the buffer function (relieving the expansion force). Therefore, the risk of thermal runaway of the battery module 10 can be further reduced.

[0044] Optionally, the second battery cell assembly 112 and the first battery cell 1111 have the same size in the second direction Y, so as to facilitate the fixation between the first battery cell assembly 111 and the second battery cell assembly 112.

[0045] In this embodiment, the first battery cell 1111 and the second battery cell 1121 are both square battery cells and have the same size. When arranging the second heat insulation and buffer pad 1122, the difference between the width of the first battery cell 1111 (the dimension in the second direction Y) and the sum of the thicknesses of at least two second battery cells 1121 (the dimension in the second direction Y) can be utilized for design.

[0046] Exemplarily, the number of the first battery cells 1111 in the first battery cell assembly 111 is three, and the number of the second battery cells 1121 in the second battery cell assembly 112 is also three. The first battery cells 1111 and the second battery cells 1121 have the same size, with a thickness of 54 mm and a width of 174 mm. The dimension of the first battery cell 1111 in the second direction Y is 174 mm, and the sum of the dimensions of the three second battery cells 1121 in the second direction Y is 162 mm (3×54 mm). That is to say, the side formed after arranging the three second battery cells 1121 is 12 mm smaller in size than the front surface of a single first battery cell 1111. Therefore, in this embodiment, the second heat insulation and buffer pad 1122 is arranged using this 12 - mm dimension.

[0047] Optionally, please refer to Figure 1 、 Figure 4 and Figure 5 . Honeycomb holes 15 are provided on the first heat insulation and buffer pad 1112, the second heat insulation and buffer pad 1122, and the third heat insulation and buffer pad 14. The first heat insulation and buffer pad 1112 and the third heat insulation and buffer pad 14 achieve air circulation with the outside through the honeycomb holes 15, and the second heat insulation and buffer pad 1122 and the third heat insulation and buffer pad 14 achieve air circulation with each other through the honeycomb holes 15.

[0048] The honeycomb holes 15 are a plurality of through holes that penetrate through two opposite surfaces of the heat insulation buffer pads (the first heat insulation buffer pad 1112, the second heat insulation buffer pad 1122, or the third heat insulation buffer pad 14). The honeycomb holes 15 on the first heat insulation buffer pad 1112 and the third heat insulation buffer pad 14 extend along the second direction Y, so that the first heat insulation buffer pad 1112 and the third heat insulation buffer pad 14 can achieve air circulation with the outside. The honeycomb holes 15 on the second heat insulation buffer pad 1122 extend along the first direction X. At the same time, honeycomb holes 15 extending along the first direction X are also provided in the area of the third heat insulation buffer pad 14 corresponding to the second heat insulation buffer pad 1122, and the honeycomb holes 15 communicate with the honeycomb holes 15 extending along the second direction Y in the third heat insulation buffer pad 14. In this way, the air circulation between the second heat insulation buffer pad 1122 and the outside is achieved. When the temperature of the battery module 10 is high, cold air can be introduced into the battery module 10 to reduce the temperature of the battery cells. The cold air enters the honeycomb holes 15 from the side of the battery module 10 and circulates in the battery cell assembly by using the flow channels formed by the honeycomb holes 15 on the first heat insulation buffer pad 1112, the second heat insulation buffer pad 1122, and the third heat insulation buffer pad 14, so as to take out the heat generated on the large surface of the battery cells.

[0049] Optionally, please refer to Figure 3 and Figure 4 The battery module 10 further includes a cover plate 13. The cover plate 13 covers the tops of the first battery cell 1111 and the second battery cell 1121. A first stud 141 is provided at the top of the third heat insulation buffer pad 14. A first through hole corresponding to the first stud 141 is provided on the cover plate 13. After the first stud 141 passes through the first through hole, it is engaged with a first nut 16 to fix the cover plate 13 on the third heat insulation buffer pad 14.

[0050] Exemplarily, the number of the first studs 141 on each third heat insulation buffer pad 14 is two, and the two first studs 141 are arranged at opposite ends of the upper surface of the third heat insulation buffer pad 14 along the second direction Y.

[0051] Optionally, please refer to Figure 2 and Figure 3 The battery module 10 further includes two end plates 17 and a tie strap 18. The two end plates 17 are respectively located on opposite sides of the battery cell assembly in the first direction X. The tie strap 18 surrounds the end plates 17 and the battery cell assembly along the first direction X and the second direction Y to bundle the end plates 17 and the battery cell assembly together. A second through hole 142 extending along the second direction Y is provided on the third heat insulation buffer pad 14. Third through holes corresponding to the two ends of the second through hole 142 are provided on the tie strap 18. A fixing screw 19 passes through the third through hole, the second through hole 142, and another third through hole in sequence and is engaged with a fixing nut 20 to fix the tie strap 18 on the third heat insulation buffer pad 14.

[0052] Exemplarily, the number of the straps 18 is two, and the two straps 18 are arranged at intervals along the height direction Z of the first battery cell 1111 and the second battery cell 1121.

[0053] Exemplarily, the end plate 17 is provided with a groove, and the width of the groove is equal to or slightly larger than the width of the strap 18, and the strap 18 is tied in the groove of the end plate 17.

[0054] Exemplarily, a second stud 171 is provided on the top of the end plate 17, a second through hole 142 corresponding to the second stud 171 is provided on the cover plate 13, and the second stud 171 passes through the second through hole 142 and is matched with a second nut 21 to fix the cover plate 13 on the end plate 17.

[0055] Optionally, please refer to Figure 1 , the battery module 10 further includes a connecting tab 22, the connecting tab 22 includes a first connecting portion 221 and a second connecting portion 222 connected to the first connecting portion 221, the first connecting portion 221 is used for connecting to the electrode terminals of at least two first battery cells 1111 in the first battery cell assembly 111, so as to realize the electrical connection between at least two first battery cells 1111 in the first battery cell assembly 111. The second connecting portion 222 is used for connecting to the electrode terminals of at least two second battery cells 1121 in the second battery cell assembly 112, so as to realize the electrical connection between at least two second battery cells 1121 in the second battery cell assembly 112. The connection between the first connecting portion 221 and the second connecting portion 222 realizes the electrical connection between two adjacent first battery cell assemblies 111 and second battery cell assemblies 112.

[0056] Optionally, the battery module 10 further includes two output tabs 23, and the two output tabs 23 are respectively connected to the first battery cell assembly 111 or the second battery cell assembly 112 located at the edge in the first direction X in the battery cell assembly.

[0057] If the first battery cell assembly 111 is located at the edge, the output tab 23 is used for connecting to the electrode terminals of at least two first battery cells 1111 in the first battery cell assembly 111. It can be understood that the electrode terminals connected by the output tab 23 have opposite polarities to the electrode terminals connected by the connecting tab 22 on the first battery cell assembly 111. That is to say, if the output tab 23 is connected to the positive electrode terminal of the first battery cell 1111 in the first battery cell assembly 111, the connecting tab 22 connected to the first battery cell assembly 111 is connected to the negative electrode terminal of the first battery cell 1111 in the first battery cell assembly 111; if the output tab 23 is connected to the negative electrode terminal of the first battery cell 1111 in the first battery cell assembly 111, the connecting tab 22 connected to the first battery cell assembly 111 is connected to the positive electrode terminal of the first battery cell 1111 in the first battery cell assembly 111.

[0058] If the second battery cell assembly 112 is located at the edge, the output bus bar 23 is used to connect to the pole columns of at least two second battery cells 1121 in the second battery cell assembly 112. It can be understood that the pole columns connected by the output bus bar 23 have opposite polarities to the pole columns connected by the connection bus bar 22 on the second battery cell assembly 112. That is to say, if the output bus bar 23 is connected to the positive pole column of the second battery cell 1121 in the second battery cell assembly 112, then the connection bus bar 22 connected to the second battery cell assembly 112 is connected to the negative pole column of the second battery cell 1121 in the second battery cell assembly 112; if the output bus bar 23 is connected to the negative pole column of the second battery cell 1121 in the second battery cell assembly 112, then the connection bus bar 22 connected to the second battery cell assembly 112 is connected to the positive pole column of the second battery cell 1121 in the second battery cell assembly 112.

[0059] This embodiment also provides a vehicle, including the battery module 10 of any one of the above.

[0060] This vehicle includes the same structure and beneficial effects as the battery module 10 in the foregoing embodiments. The structure and beneficial effects of the battery module 10 have been described in detail in the foregoing embodiments and will not be elaborated herein.

[0061] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell assembly, the battery cell assembly comprising a first battery cell assembly and a second battery cell assembly alternately distributed along a first direction, the first battery cell assembly being electrically connected to an adjacent second battery cell assembly, the first battery cell assembly comprising at least two first battery cells, at least two of the first battery cells being distributed in sequence along the first direction and electrically connected, the second battery cell assembly comprising at least two second battery cells, at least two of the second battery cells being distributed in sequence along a second direction and electrically connected, the second direction being perpendicular to the first direction and a height direction of the second battery cells.

2. The battery module according to claim 1, characterized in that: It also includes a cover plate, which is arranged on the top of the battery cell assembly. The surface of the cover plate facing away from the first battery cell and the second battery cell is a convex arc surface, and a plurality of pressure relief grooves are arranged on the convex arc surface. The plurality of pressure relief grooves respectively correspond to the explosion-proof valves of the first battery cell or the second battery cell.

3. The battery module according to claim 2, characterized in that: The cover plate is also provided with a liquid collecting groove, and the liquid collecting groove is used to collect the electrolyte flowing out of the pressure relief groove.

4. The battery module according to claim 1, characterized in that: The first battery cell assembly also includes a first thermal insulation buffer pad, which is located between two adjacent first battery cells. The second battery cell assembly also includes a second thermal insulation buffer pad, which is located between two adjacent second battery cells. A third thermal insulation buffer pad is also provided between the first battery cell assembly and the second battery cell assembly.

5. The battery module according to claim 4, characterized in that: The second battery cell assembly and the first battery cell have the same size in the second direction.

6. The battery module according to claim 4, characterized in that: The first thermal insulation buffer pad, the second thermal insulation buffer pad and the third thermal insulation buffer pad are all provided with honeycomb holes, and the first thermal insulation buffer pad and the third thermal insulation buffer pad achieve air circulation with the outside through the honeycomb holes, and the second thermal insulation buffer pad and the third thermal insulation buffer pad achieve air circulation between each other through the honeycomb holes.

7. The battery module according to claim 4, characterized in that: It also includes a cover plate, which is arranged on the top of the first battery cell and the second battery cell. A first stud is provided on the top of the third thermal insulation buffer pad. A first through hole corresponding to the first stud is provided on the cover plate. The first stud passes through the first through hole and cooperates with a first nut to fix the cover plate on the third thermal insulation buffer pad.

8. The battery module according to claim 4, characterized in that: It also includes two end plates and a strap, the two end plates are respectively located on the opposite sides of the battery cell assembly in the first direction, the strap surrounds the end plates and the battery cell assembly along the first direction and the second direction, the third thermal insulation buffer pad is provided with a second through hole extending along the second direction, the strap is provided with third through holes corresponding to the two ends of the second through hole, and a fixing screw passes through the third through hole, the second through hole and another third through hole in sequence and then cooperates with a fixing nut to fix the strap on the third thermal insulation buffer pad.

9. The battery module according to claim 1, characterized in that: It also includes a connecting bar, which includes a first connecting part and a second connecting part connected to the first connecting part, the first connecting part is used to connect to the poles of at least two of the first battery cells in the first battery cell assembly, and the second connecting part is used to connect to the poles of at least two of the second battery cells in the second battery cell assembly.

10. A vehicle, characterized in that: Comprising the battery module according to any one of claims 1 to 9.

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