Battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module which comprises a battery cell group, and the battery cell group comprises a plurality of stacked battery monomers with pole columns; the isolation plate is located on the side, provided with the pole columns, of the single battery body and connected with the single battery body, and a plurality of through openings corresponding to the pole columns one to one are formed in the isolation plate; the busbar is positioned on one side, deviating from the battery monomers, of the isolation plate and is electrically connected with the pole columns of the two adjacent battery monomers respectively; the connecting sheets are electrically connected with the pole columns, which are not connected with the busbar, of the battery monomers, and the connecting sheets and the busbar are arranged at intervals; the wiring terminal is arranged on one side of the isolation plate; the fuse is arranged on one side of the isolation plate in the first direction, and the two ends of the fuse are electrically connected to the connecting piece and the wiring terminal respectively. According to the battery module, the independent fuses are arranged, so that when a single battery module is short-circuited, the fuses of the corresponding modules are fused to form an open circuit for the battery module, the safety performance of the battery module is improved, and meanwhile, a fault module can be conveniently checked.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module. BACKGROUND

[0002] New energy battery is increasingly popular, and safety problem is also increasingly valued. The existing automobile power battery or energy storage battery will first combine multiple battery monomers together to form a module, and then multiple modules are electrically connected to form a whole package. Among them, an fuse is usually connected in series in the high-voltage loop of the battery package and the power equipment to cut off the whole circuit in time when a short circuit occurs in the high-voltage loop, but the short circuit is often caused by local electrical component failure, so after the failure, multiple modules need to be checked one by one, which is time-consuming and laborious. On the other hand, each battery module needs to be connected to the fuse by additional flying wire for testing before leaving the factory, which is also not conducive to improving production efficiency. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a battery module.

[0004] The application embodiment provides a battery module with intersecting first direction and second direction, comprising:

[0005] The cell group comprises a plurality of battery monomers stacked along the first direction, and the battery monomers have a pole on one side along the second direction.

[0006] The isolation plate is located on the side of the battery monomer provided with the pole and connected with the battery monomer, a plurality of openings penetrating along the second direction are formed on the isolation plate, the openings are arranged one by one corresponding to the poles, and the poles are arranged in the openings along the second direction.

[0007] The busbar is located on the side of the isolation plate away from the battery monomer and is electrically connected with the poles of the adjacent two battery monomers.

[0008] The connecting sheet is electrically connected with the pole of the battery monomer which is not connected with the busbar, and the connecting sheet is arranged in the interval between the busbar.

[0009] The wiring terminal is arranged on one side of the isolation plate along the first direction.

[0010] The fuse is arranged on one side of the isolation plate along the first direction, and the two ends of the fuse are respectively electrically connected with the connecting sheet and the wiring terminal.

[0011] In an embodiment, the battery module further comprises an insurance box connected to one end of the isolation plate along the first direction; the insurance box is provided with a recess on a side thereof away from the group of battery cells along the second direction, and the fuse is fixed in the recess.

[0012] In an embodiment, the battery module satisfies at least one of the following conditions:

[0013] (a) at least part of the connecting piece is located in the recess;

[0014] (b) the insurance box is integrally formed with the isolation plate;

[0015] (c) the terminal is arranged in the recess.

[0016] In an embodiment, the battery module further comprises an end plate arranged on one side of the group of battery cells along the first direction, and the insurance box and the end plate are arranged opposite to each other along the second direction.

[0017] In an embodiment, the battery module further comprises a box cover detachably connected to the insurance box, and the box cover and the recess enclose a first cavity, and the fuse is arranged in the first cavity.

[0018] In an embodiment, the battery module further comprises a cover plate arranged on a side of the busbar away from the group of battery cells, and the cover plate and the isolation plate form a second cavity, and the busbar is arranged in the second cavity.

[0019] The box cover is arranged on one side of the cover plate along the first direction, and the box cover and the cover plate are arranged independently of each other.

[0020] In an embodiment, the busbar comprises a first piece, a second piece and a clamping portion, the first piece and the second piece are respectively electrically connected to the pole of two adjacent battery cells, the clamping portion is connected between the first piece and the second piece, and the clamping portion is arched away from the group of battery cells along the second direction.

[0021] The isolation plate is provided with a plurality of support portions located between two adjacent busbars.

[0022] Wherein, along the second direction, the height of the clamping portion is H1, the height of the support portion (22) is H2, and H2>H1.

[0023] In an embodiment, the battery module has a third direction, and the first direction, the second direction and the third direction intersect with each other.

[0024] The battery module also includes a circuit board, which is disposed on the side of the separator away from the cell assembly along the second direction. The circuit board extends along the first direction, and there are multiple busbars distributed on both sides of the circuit board along the third direction.

[0025] In one embodiment, the battery cell further includes an explosion-proof valve, which is disposed on the side of the battery cell having the terminal post, and a plurality of explosion-proof valves are spaced apart and arranged sequentially along the first direction;

[0026] The circuit board has multiple first through holes, and the isolation plate has multiple second through holes arranged along the second direction. The explosion-proof valve corresponds one-to-one with the first through holes, and the first through holes and the second through holes correspond one-to-one.

[0027] In one embodiment, a connector is further included, the connector being disposed on the side of the circuit board away from the battery cell assembly along the second direction, and the connector being connected to the middle portion of the circuit board along the first direction, the connector being spaced apart from the first through hole, and the connector being used to output data from the circuit board.

[0028] Compared with the prior art, the technical solutions provided in this application have the following advantages:

[0029] Multiple battery cells are electrically connected to each other using multiple busbars, and a connecting piece is used to electrically connect to a terminal of one of the battery cells that is not connected to a busbar, thus forming the charging and discharging circuit of the battery module. An independent fuse is installed between the connecting piece and the terminal. When a short circuit occurs in a single battery module, the fuse of the corresponding module will blow to open the circuit of that battery module, thus not affecting the normal operation of other modules, improving the safety performance of the battery module, and making it easier to troubleshoot faulty modules. Attached Figure Description

[0030] Figure 1 This is an exploded view of a battery module according to this application;

[0031] Figure 2 This is a schematic diagram of the structure of an embodiment of a battery module according to this application;

[0032] Figure 3 This is a schematic diagram of another embodiment of a battery module according to this application;

[0033] Figure 4 This is a schematic diagram of the structure of an isolation plate in a battery module according to this application;

[0034] Figure 5 This is a schematic diagram of the busbar structure in a battery module according to this application.

[0035] Numbering on the map:

[0036] 10. Cell assembly; 11. Battery cell; 11a. Terminal post; 20. Separator; 21. Opening; 22. Support; 23. Second through hole; 24. Mounting position; 30. Busbar; 31. First sheet; 32. Second sheet; 33. Holding part; 40. Connecting piece; 50. Connecting terminal; 60. Fuse; 70. Fuse box; 70a. Groove; 80. End plate; 90. Box cover; 100. Cover plate; 100a. Vent; 110. Circuit board; 110a. First through hole; 120. Explosion-proof valve; 130. Connector; 140. Side plate; 150. Fastener; X, First direction; Z, Second direction; Y, Third direction. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0038] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0039] Reference Figures 1 to 3 This application provides a battery module having intersecting first direction X and second direction Z. The battery module includes a cell group 10, an isolation plate 20, a connecting piece 40, a terminal block 50, a fuse 60, and a busbar 30.

[0040] Specifically, the battery cell assembly 10 includes multiple battery cells 11 stacked along a first direction X. Each battery cell 11 has a terminal post 11a on one side along a second direction Z. A separator plate 20 is located on the side of the battery cell 11 with the terminal post 11a and is connected to the battery cell 11. The separator plate 20 has multiple openings 21 extending along the second direction Z, with each opening corresponding to a terminal post 11a, and the terminal post 11a is inserted through the opening along the second direction Z, so that the terminal post 11a is exposed from the opening 21. A busbar 30 is located on the side of the separator plate 20 away from the battery cell 11 and is electrically connected to the terminal posts 11a of two adjacent battery cells 11. That is, the two ends of a busbar 30 are respectively connected to one terminal post 11a of two adjacent battery cells 11, so that multiple battery cells 11 are electrically connected to each other. A connecting piece 40 is electrically connected to the terminal posts 11a of the battery cell 11 that are not connected to the busbar 30, and the connecting piece 40 is spaced apart from the busbar 30. Terminal 50 is disposed on one side of the isolation plate 20 along the first direction X. Fuse 60 is disposed on one side of the isolation plate 20 along the first direction X, and both ends of fuse 60 are electrically connected to connecting piece 40 and terminal 50 respectively.

[0041] In the battery module of this application, multiple battery cells 11 are electrically connected to each other using a busbar 30, and a connecting piece 40 is electrically connected to a terminal of one of the multiple battery cells 11 that is not connected to the busbar 30, to form the charging and discharging circuit of the battery module. An independent fuse 60 is provided between the connecting piece and the terminal 50. When a short circuit occurs in a single battery module, the fuse 60 of the corresponding module will melt and break the circuit of that battery module, thus not affecting the normal operation of other modules, improving the safety performance of the battery module, and making it easier to troubleshoot faulty modules.

[0042] It should be noted that the first direction X and the second direction Z mentioned above are hypothetical for the convenience of describing the positional relationship between components. However, for clarity, this embodiment uses the partition plate 20 as a reference, and the first direction X refers to the length direction of the partition plate 20 (refer to...). Figure 1 The X direction in the diagram refers to the direction of the partition plate 20, and the second direction Z refers to the height direction of the partition plate 20 (refer to the X direction in the diagram). Figure 1 (in the Z direction).

[0043] For example, the battery cells 11 need to be electrically connected to each other through the busbar 30. In order to support the busbar 30, in this embodiment, an isolation plate 20 is provided on the side of the battery cell 11 where the terminal post 11a is provided, and multiple openings 21 are provided on the isolation plate 20 along the second direction Z, so that only the terminal post 11a corresponding to the battery cell 11 is exposed through the opening 21. On the one hand, it can support the busbar 30, and on the other hand, it can prevent the busbar from conducting electricity with the top cover or casing of the battery cell, effectively protecting the battery cell 11. In addition, the isolation plate 20 can be made of one of PC (polycarbonate), PP (polypropylene) or PBT (polyethylene terephthalate), or it can be made of a material with good electrical insulation properties in the prior art, and there is no limitation thereto.

[0044] Please refer to Figure 1 and Figure 2 In one embodiment, the system further includes a fuse box 70, which is connected to one end of the partition plate 20 along the first direction X. The fuse box 70 has a groove 70a on the side of the fuse box 70 facing away from the battery cell assembly 10 along the second direction Z, and the fuse 60 is fixed within the groove 70a. In other words, by connecting the fuse box 70 to one end of the partition plate along the first direction X, and forming a groove 70a on the side of the fuse box 70 facing away from the battery cell assembly 10 along the second direction Z, the fuse 60 can be fixed within the groove 70a of the fuse box 70 without occupying the installation space of the partition plate 20, resulting in a more compact structure. It should be noted that when installing the fuse 60, to prevent a short circuit between the fuse 60 and the fuse box 70, which could cause the fuse 60 to blow, it is necessary to ensure that the fuse box 70 has good electrical insulation. Therefore, the fuse box 70 can be made of one of PC (polycarbonate), PP (polypropylene) or PBT (polyethylene terephthalate), or it can be made of a material with good electrical insulation properties in the prior art, and there is no limitation thereto.

[0045] Please refer to Figure 3 In one embodiment, the battery module satisfies at least one of the following: (a) at least a portion of the connecting piece 40 is located within the groove 70a; (b) the fuse box 70 is integrally formed with the separator 20; and (c) the wiring terminal 50 is disposed within the groove 70a.

[0046] For example, since the fuse 60 is fixed in the groove 70a of the fuse box 70, in order to achieve electrical connection between the fuse 60 and the connecting piece 40 and the terminal 50, in practical applications, at least a portion of the connecting piece 40 needs to extend into the groove 70a and connect to one end of the fuse 60, the other portion of the connecting piece 40 needs to be electrically connected to one of the plurality of battery cells 11, and the terminal 50 needs to be disposed in the groove 70a and electrically connected to the other end of the fuse 60. Therefore, in this embodiment, the battery module simultaneously satisfies (a) and (c) above.

[0047] For example, the fuse box 70 and the partition plate 20 can be a single piece or separate pieces. That is, the fuse box 70 and the partition plate 20 can be manufactured using a one-piece molding process, or they can form two separate structures: the fuse box 70 and the partition plate 20 are molded separately and then connected. In this embodiment, the fuse box 70 and the partition plate 20 are integrally molded, forming a single piece, which eliminates the need for a connection between the fuse box 70 and the partition plate 20, ensuring sufficient structural strength.

[0048] Please refer to Figure 3 In one embodiment, it further includes an end plate 80, which is disposed on one side of the battery cell assembly 10 along the first direction X, and the fuse box 70 is disposed opposite to the end plate 80 along the second direction Z.

[0049] In practical applications, the battery module includes two end plates 80, two side plates 140, and at least one fastener 150. The two end plates 80 are disposed on both sides of the cell assembly 10 along the first direction X and are arranged along the second direction Z. One end plate 80 is located on the same side as the fuse box 70 and is disposed opposite to it. The two side plates 140 are disposed opposite to each other between the two end plates 80 to form a square frame with a receiving cavity, in which multiple battery cells 11 are neatly stored. At the same time, the fastener 150 is wrapped around the outer surface of the square frame to tightly connect the two end plates 80 and the two side plates 140, preventing the end plates 80 and side plates 140 from loosening during use and causing the battery cells to fall out of the receiving cavity.

[0050] In addition, one of the end plates 80 abuts against the bottom surface of the fuse box 70 along the second direction Z, thereby supporting the fuse box 70 and preventing the fuse box 70 from being broken during the installation of the fuse 60 or the terminal block 50.

[0051] Please refer to Figure 2 In one embodiment, the system further includes a cover 90, which is detachably connected to the fuse box 70. The cover 90 and the groove 70a form a first cavity, in which the fuse 60 is disposed. Thus, the cover 90 can be used to close the fuse box 70, allowing the fuse 60 to be housed within the first cavity. This prevents external impurities from entering the first cavity and contacting the fuse 60, which could cause a short circuit and melt the fuse 60. Furthermore, the cover 90 is located at the edge of the module, facilitating easy opening and replacement / repair after the fuse has melted.

[0052] In one embodiment, a cover plate 100 is also included. The cover plate 100 is disposed on the side of the busbar 30 away from the cell assembly 10, and the cover plate 100 and the separator 20 form a second cavity, within which the busbar 30 is disposed. A case cover 90 is disposed on the side of the cover plate 100 along the first direction X, and the case cover 90 and the cover plate 100 are independently disposed. That is, after the busbar 30 electrically connects multiple battery cells 11 to each other, the cover plate 100 is used to cover the busbar 30, so that the busbar 30 is housed within the second cavity formed by the cover plate 100 and the separator 20. This prevents external impurities from falling onto the busbar 30 or the terminal post 11a during use of the battery module, which could lead to a short circuit. In addition, the cover plate 100 needs to be made of a material with good electrical insulation properties to ensure that the cover plate 100 does not conduct electricity when in contact with the busbar 30, thus preventing a short circuit.

[0053] Please refer to Figure 4 and Figure 5 In one embodiment, the busbar 30 includes a first sheet 31, a second sheet 32, and a retaining portion 33. The first sheet 31 and the second sheet 32 ​​are electrically connected to a terminal 11a of two adjacent battery cells 11, respectively. The retaining portion 33 is connected between the first sheet 31 and the second sheet 32, and the retaining portion 33 arches away from the cell assembly 10 along a second direction Z. The separator 20 is provided with a plurality of support portions 22, which are located between two adjacent busbars 30. In other words, when the busbar 30 electrically connects two adjacent battery cells 11, the first piece 31 and the second piece 32 of the busbar 30 are first aligned with the terminals 11a exposed from the opening 21 of the two adjacent battery cells 11. Then, the busbar 30 is pressed close to the separator plate 20, so that the first piece 31 and the second piece of the busbar 30 are connected to the terminals 11a of the two adjacent battery cells. At this time, the busbar is located between two adjacent support parts, and the ends of the first piece 31 and the second piece 32 of the busbar abut against the support parts, thereby realizing the electrical connection of the two adjacent battery cells 11.

[0054] In this configuration, along the second direction Z, the height of the retaining part 33 is H1, and the height of the supporting part 22 is H2, with H2 > H1. Thus, when the cover plate 100 is used for sealing, the top surface of the supporting part 22 contacts the surface of the cover plate. Since the height of the retaining part 33 along the second direction Z is less than the height of the supporting part 22, the busbar 30 does not contact the cover plate 100. This prevents the cover plate 100 from squeezing the busbar 30 during assembly, thus preventing deformation of the busbar 30.

[0055] In one embodiment, the battery module has a third direction Y, a first direction X, a second direction Z, and the third direction Y intersecting each other. The battery module also includes a circuit board 110, which is disposed on the side of the separator 20 away from the cell assembly 10 along the second direction Z. The circuit board 110 extends along the first direction X, and multiple busbars 30 are distributed on both sides of the circuit board 110 along the third direction Y.

[0056] For clarity, this embodiment uses the isolation plate 20 as a reference, and the third direction Y refers to the width direction of the isolation plate 20 (reference). Figure 1 Y direction in ).

[0057] For example, the circuit board 110 has internal data acquisition lines for collecting current, voltage, and temperature information of the battery cell 11, and then outputting the collected information to the outside world for external judgment of whether an abnormality has occurred in the module. It should be noted that the circuit board 110 can be directly connected to the battery cell 11, or the battery cell 11 can be electrically connected first using the bus 30, and then the bus 30 can be connected to the circuit board 110; there is no limitation on this.

[0058] In addition, a mounting position 24 is formed in the middle of the isolation plate 20, and the circuit board 110 is fixed in the mounting position 24, so that the circuit board 110 can be fixedly connected to the isolation plate 20.

[0059] In one embodiment, the battery cell 11 further includes an explosion-proof valve 120, which is disposed on the side of the battery cell 11 with the terminal post 11a. Multiple explosion-proof valves 120 are spaced apart and arranged sequentially along a first direction X. The circuit board 110 has multiple first through holes 110a, and the isolation plate 20 has multiple second through holes 23, arranged along a second direction Z. The explosion-proof valves 120 correspond one-to-one with the first through holes 110a, and the first through holes 110a and second through holes 23 correspond one-to-one. Furthermore, the cover plate 100 also has vent holes 100a corresponding one-to-one with the first through holes 110a and second through holes 23. In other words, the explosion-proof valves 120 allow the explosion-proof valves 120 to rupture and release the gas inside the battery cell 11 when an abnormal situation occurs in the battery cell 11 (e.g., short circuit, overcharge), helping to alleviate the internal pressure of the battery cell 11 and prevent explosion or fire. The first through hole 110a on the circuit board 110 and the second through hole 23 on the isolation plate 20 are designed so that when the explosion-proof valve 120 is ruptured, the gas released can be quickly discharged from the first through hole 110a, the second through hole 23 and the exhaust hole 100a in sequence, so as to avoid the gas being blocked by the circuit board 110 or the isolation plate 20 and unable to be released.

[0060] Please combine Figure 1 and Figure 3In one embodiment, a connector 130 is further included. The connector 130 is disposed on the side of the circuit board 110 opposite to the battery cell assembly 10 along the second direction Z, and the connector 130 is connected to the middle part of the circuit board 110 along the first direction X. The connector 130 is spaced apart from the first through hole 110a, and the connector 130 is used to output data from the circuit board 110. That is, by providing the connector 130 on the circuit board 110, an external receiving device can be quickly plugged into the connector 130 to receive the data output by the circuit board 110, thereby determining whether the battery module meets the standard. In addition, it should be noted that the middle part of the circuit board 110 along the first direction X mentioned above refers to the middle position of the circuit board 110, so that the first through hole 110a can be opened at intervals on the circuit board 110 using this position as a reference point.

[0061] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery module having a first direction (X) and a second direction (Z) that intersect, characterized by, The battery module comprises: a cell group (10) comprising a plurality of battery cells (11) stacked along a first direction (X), the battery cells (11) having a pole (11a) on one side along a second direction (Z); a separation plate (20) located on the side of the battery cells (11) provided with the poles (11a) and connected with the battery cells (11), the separation plate (20) being provided with a plurality of openings (21) penetrating along the second direction (Z), the openings (21) being arranged one-to-one with the poles (11a), and the poles (11a) penetrating the openings (21) along the second direction (Z); busbars (30) located on the side of the separation plate (20) away from the battery cells (11) and electrically connected with the poles (11a) of two adjacent battery cells respectively; connection pieces (40) electrically connected with the poles (11a) of the battery cells (11) not connected with the busbars (30), and the connection pieces (40) being arranged apart from the busbars (30); terminal wires (50) arranged on one side of the separation plate (20) along the first direction (X); and fuses (60) arranged on one side of the separation plate (20) along the first direction (X), and the two ends of the fuses (60) being electrically connected with the connection pieces (40) and the terminal wires (50) respectively. The battery module further comprises a fuse box (70) connected to one end of the separation plate (20) along the first direction (X), and the fuse box (70) is provided with a groove (70a) on the side away from the cell group (10) along the second direction (Z), and the fuses (60) are fixed in the groove (70a).

2. The battery module of claim 1, wherein, The battery module satisfies at least one of the following conditions:

3. The battery module of claim 2, wherein, (a) at least part of the connection pieces (40) is located in the groove (70a); (b) the fuse box (70) is integrally formed with the separation plate (20); (c) the terminal wires (50) are arranged in the groove (70a). The battery module further comprises an end plate (80) arranged on one side of the cell group (10) along the first direction (X), and the fuse box (70) and the end plate (80) are arranged opposite to each other along the second direction (Z).

4. The battery module of claim 3, wherein, The battery module further comprises a cover (90) detachably connected with the fuse box (70), and the cover (90) and the groove (70a) form a first cavity, and the fuses (60) are arranged in the first cavity.

5. The battery module of any one of claims 3 to 4, wherein, The battery module further comprises a cover plate (100) arranged on the side of the busbars (30) away from the cell group (10), and the cover plate (100) and the separation plate (20) form a second cavity, and the busbars (30) are arranged in the second cavity; 6. The battery module of claim 5, wherein, the cover (90) is arranged on one side of the cover plate (100) along the first direction (X), and the cover (90) and the cover plate (100) are arranged independently of each other. ​ 7. The battery module of claim 6, wherein, The busbar (30) comprises a first sheet (31), a second sheet (32) and a clamping portion (33), the first sheet (31) and the second sheet (32) are respectively electrically connected with the pole (11a) of the adjacent two battery monomers (11), the clamping portion (33) is connected between the first sheet (31) and the second sheet (32), and the clamping portion (33) is arched away from the battery cell group (10) along the second direction (Z); A plurality of supporting portions (22) are arranged on the isolation plate (20), and the supporting portions (22) are located between the adjacent two busbars (30); Wherein, along the second direction (Z), the height of the clamping portion (33) is H1, the height of the supporting portion (22) is H2, and H2>H1.

8. The battery module of claim 1, wherein, The battery module has a third direction (Y), the first direction (X), the second direction (Z) and the third direction (Y) intersect with each other; The battery module further comprises a circuit board (110), the circuit board (110) is arranged on the side of the isolation plate (20) away from the battery cell group (10) along the second direction (Z), the circuit board (110) extends along the first direction (X), and the busbar (30) is a plurality of and is distributed on both sides of the circuit board (110) along the third direction (Y).

9. The battery module of claim 8, wherein, The battery monomer (11) further comprises an explosion-proof valve (120), the explosion-proof valve (120) is arranged on the side of the battery monomer (11) having the pole (11a), a plurality of explosion-proof valves (120) are arranged along the first direction (X) and sequentially arranged; A plurality of first through holes (110a) are arranged on the circuit board (110), a plurality of second through holes (23) are arranged on the isolation plate (20) along the second direction (Z), the explosion-proof valve (120) corresponds to the first through hole (110a) one by one, and the first through hole (110a) corresponds to the second through hole (23) one by one.

10. The battery module of claim 9, wherein, Further comprising a connector (130), the connector (130) is arranged on the side of the circuit board (110) away from the battery cell group (10) along the second direction (Z), the connector (130) is connected to the middle part of the circuit board (110) along the first direction (X), the connector (130) is arranged apart from the first through hole (110a), and the connector (130) is used for outputting data from the circuit board (110).

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