Battery module and battery pack

Abstract

To provide a battery module with high reliability in fixation between a high-voltage output terminal and an FPC low-voltage connector, and provide a battery pack.SOLUTION: A battery module includes a frame, a plurality of cells, and an output terminal stage. The frame includes: side plates that are opposite each other; and a first end plate and a second end plate that are opposite each other. The plurality of cells are laminated and attached to the frame. The output terminal stage includes: a high-voltage output terminal attachment part 31 and a low-voltage output terminal attachment part 32 that are adjacently arranged; and restriction parts 331 to 333 that are formed by being extended from a bottom part of the low-voltage output terminal attachment part. Restriction grooves 1211 to 1213 and an attachment groove 122 are provided on an upper part of the first end plate. The high-voltage output terminal attachment part is attached to the attachment groove, and each restriction part is attached to the restriction groove in order to connect the output terminal stage to the first end plate.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to the technical field of batteries, and more particularly to a battery module and a battery pack. [Background technology]

[0002] Currently, a battery module includes a frame and a number of cells accommodated in the frame. To achieve serial connection of the cells, the cells are electrically connected through a conductive connection sheet. The module is provided with a high-voltage output sheet, which is used for serial connection between adjacent modules or for direct output of power. For electrical safety, the connection strength between the high-voltage output sheet and the module needs to meet certain requirements. Currently, a common arrangement is to design an output terminal block on the end plate of the frame of the module. The output terminal block is fixed on the end plate, and the high-voltage output sheet is fixed to the output terminal block. In addition, to monitor the working state of the cells, the module also includes a low-voltage sampling component configured to collect voltage and temperature information of the module and share the information with an external device. Generally, the sampling assembly also needs to be fixed to the module.

[0003] In a battery module, generally referred to as an integrated battery module, it is necessary to collect and output electrical signals and temperature signals, and a conductive sheet is required to output the power to an electrical device. Both functions can be integrated into one assembly. Generally, the module has a frame structure to provide its strength, and the frame structure includes opposing side plates and opposing end plates. An output terminal fixing base is provided on the end plate of the module. At this stage, the method commonly used in the industry is to fix the output terminal base on the end plate by bolts. However, the currently available mounting method faces the problem of low reliability of the fixing between the high voltage output terminal and the FPC low voltage connector. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above-mentioned shortcomings of the related art, the present invention aims to provide a battery module and a battery pack to address the problem of unreliable fixation between the high voltage output terminal and the FPC low voltage connector, which is present in currently available output terminal block mounting methods. [Means for solving the problem]

[0005] To achieve the above and other related objectives, the present invention provides a battery module including a frame, a plurality of cells, and an output terminal block.

[0006] The frame includes side plates facing each other, and first and second end plates facing each other.

[0007] A number of the cells are stacked and attached to a frame.

[0008] The output terminal block includes a high-voltage output terminal mounting portion, a low-voltage output terminal mounting portion, and a limiting portion. The high-voltage output terminal mounting portion and the low-voltage output terminal mounting portion are arranged side by side, and the limiting portion is formed by extending from a bottom of the low-voltage output terminal mounting portion.

[0009] Here, a limiting groove and a mounting groove are provided on the upper portion of the first end plate, and the high voltage output terminal mounting portion is mounted in the mounting groove, and the limiting portion is mounted in the limiting groove to connect the output terminal block to the first end plate.

[0010] In one embodiment of the invention, the battery module further includes a cell contact system assembly, the cell contact system assembly being electrically connected to the cells. The cell contact system assembly includes a sampling assembly and a high voltage output sheet. The sampling assembly includes a flexible circuit board and a low voltage connector, the flexible circuit board being electrically connected to the cells. The low voltage connector is mounted on the low voltage output terminal mounting portion and electrically connected to the flexible circuit board. The high voltage output sheet is mounted on the high voltage output terminal mounting portion and electrically connected to the cells.

[0011] In one embodiment of the present invention, a screw hole is arranged on the high-voltage output terminal mounting portion, a high-voltage output sheet is mounted on the high-voltage output terminal mounting portion, and a through hole corresponding to the screw hole is arranged on the high-voltage output sheet.

[0012] In one embodiment of the present invention, the first end plate or the second end plate is provided with a plurality of weight-relief holes, the weight-relief holes passing through the limiting groove or the mounting groove.

[0013] In one embodiment of the present invention, the low-voltage output terminal mounting portion further includes a hook structure, which is formed by extending from both sides of the upper portion of the low-voltage output terminal mounting portion in a direction away from the low-voltage output terminal mounting portion.

[0014] In one embodiment of the present invention, the battery module further includes a reinforcing plate, which is attached to the low-voltage output terminal mounting portion and disposed above the low-voltage connector, and both ends of the reinforcing plate are engaged with and connected to the hook structures.

[0015] In one embodiment of the present invention, the stiffener plate is formed with a protrusion at each end, the protrusion at each end being located between hook structures on the same side of the low-voltage output terminal mounting portion.

[0016] In one embodiment of the present invention, the limiting groove is formed by extending from the inner side to the outer side of the first end plate in the thickness direction of the first end plate, and the outer wall of the first end plate closes the end face of the limiting groove.

[0017] In one embodiment of the present invention, the limiting portion includes a first limiting portion, a second limiting portion, and a third limiting portion. The first limiting portion and the second limiting portion are formed by extending away from the vertical direction. The third limiting portion is located between the first limiting portion and the second limiting portion and is disposed in the vertical direction. The limiting groove includes a first limiting groove, a second limiting groove, and a third limiting groove corresponding to the first limiting portion, the second limiting portion, and the third limiting portion, respectively. The first limiting portion, the second limiting portion, and the third limiting portion are respectively attached to the first limiting groove, the second limiting groove, and the third limiting groove in the thickness direction of the end plate to fix the output terminal block.

[0018] In one embodiment of the present invention, at least one of the first limiting portion and the second limiting portion is provided with a sub-limiting portion, and the limiting groove is provided with a sub-limiting groove, and the sub-limiting portion is connected with the sub-limiting groove by a concave-convex connection to form a limiting structure.

[0019] In one embodiment of the invention, the restricting portion is a plurality of resilient members, which engage with the restricting grooves.

[0020] In one embodiment of the present invention, the output terminal block is a plastic member.

[0021] The present invention further provides a battery pack including a housing, the battery module according to the above being mounted in the housing. Effect of the Invention

[0022] The present invention provides a battery module and a battery pack. In the battery module, after the output terminal block is mounted on the end plate, the inner surface of the end plate is close to the body of the cell, so that the limiting part at the bottom of the output terminal block is not easily removed from the limiting groove of the end plate, thereby providing a good limiting effect. Furthermore, the high-voltage output terminal mounting part and the low-voltage output terminal mounting part are integrated on the output terminal block. In this way, it provides a simple structure and high integration, and achieves compatibility with the cell contact system assembly. Furthermore, the limiting groove on the end plate can also be used as a weight-reducing hole of the end plate. [Brief description of the drawings]

[0023] In order to more clearly present the technical solutions provided in the embodiments of the present invention, the following briefly introduces some accompanying drawings required by the embodiments for explanation. Of course, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without inventive efforts.

[0024] [Figure 1] FIG. 1 is a structural diagram of a battery module according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a structural diagram of the assembled cell and frame of FIG. 1. [Diagram 3] FIG. 2 is a structural diagram of the frame in FIG. 1. [Figure 4] FIG. 2 is a schematic diagram of the cell of FIG. 1. [Diagram 5] FIG. 2 is a schematic diagram of a first end plate of FIG. 1. [Figure 6] FIG. 2 is a schematic diagram of the first end plate of FIG. 1 from another perspective. [Figure 7] 2 is a schematic diagram of the assembled first end plate and output terminal block of FIG. 1 from the front side. FIG. [Figure 8] 2 is a schematic view of the assembled first end plate and output terminal block of FIG. 1 from the rear side. FIG. [Figure 9] FIG. 9 is an exploded view of the assembled first end plate and output terminal block of FIG. 8. [Figure 10] FIG. 9 is an enlarged view of the structure of region C in FIG. [Figure 11] 9 is a top view of the assembled first end plate and output terminal block of FIG. 8. FIG. [Figure 12] FIG. 12 is a local cross-sectional view taken along the line AA in FIG. [Figure 13] 9 is a front view of the assembled first end plate and output terminal block of FIG. 8. [Figure 14] FIG. 14 is a local cross-sectional view of the structure taken along BB in FIG. [Figure 15] FIG. 1 is a structural diagram of a battery pack according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The implementation of the present invention is shown below by a specific embodiment. Those skilled in the art can easily understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. The details in this specification can be modified or changed based on different perspectives and applications without departing from the spirit of the present invention.

[0026] Please note that the drawings provided in the embodiments merely show the basic idea of ​​the present invention in a schematic manner. Therefore, the drawings are not based on the number, shape, and size of the parts in the actual implementation, but only show the parts related to the present invention. In the actual implementation, the type, number, and proportion of the parts can be arbitrarily changed, and the type of the parts layout can be more complicated.

[0027] 1-15, in this embodiment, the present invention provides a battery module and a battery pack that address the problem of poor reliability of fixation between a high voltage output terminal and an FPC low voltage connector found in currently available mounting methods for an output terminal block. Specifically, a battery module 100 includes a frame 10, a plurality of cells 20, and an output terminal block 30. Here, the frame 10 includes a side plate 11 facing each other and a group of end plates facing each other. The end plates include a first end plate 12 and a second end plate 13. The side plate 11, the first end plate 12, and the second end plate 13 are fixedly connected in sequence to form the frame 10. The plurality of cells 20 are stacked in sequence, and after being stacked in sequence, they are mounted in the frame 10 and fixed by the pressing effect of the side plate 11 and the end plate. The output terminal block 30 is fixedly mounted on the first end plate 12 of the frame 10.

[0028] 1 to 8, in this embodiment, the output terminal block 30 includes a high-voltage output terminal mounting portion 31, a low-voltage output terminal mounting portion 32, and a limiting portion 33. Here, the high-voltage output terminal mounting portion 31 is configured to be able to mount a high-voltage output terminal 311 so that the power of the battery module 100 can be output to an electric device to supply power to the electric device. The low-voltage output terminal mounting portion 32 is configured to be able to mount a low-voltage connector so as to output low-voltage information such as an electric signal and a temperature signal of the plurality of cells 20 collected by the sampling assembly. Specifically, the high-voltage output terminal mounting portion 31 and the low-voltage output terminal mounting portion 32 are disposed next to each other, and the limiting portion 33 is formed by extending from the bottom of the low-voltage output terminal mounting portion 32. For example, the limiting portion 33 is formed by extending downward from the bottom of the low-voltage output terminal mounting portion 32. That is, the high voltage output terminal mounting portion 31 and the low voltage output terminal mounting portion 32 are integrated on the output terminal block 30 and fixedly attached to the first end plate 12 via the limiting portion 33. In this way, a simple structure and high integration are provided, and compatibility with the cell contact system assembly is achieved. Specifically, a limiting groove 121 and a mounting groove 122 are provided on the upper portion of the first end plate 12. The high voltage output terminal mounting portion 31 is attached to the mounting groove 122, and the limiting portion 33 is attached to the limiting groove 121 to fixedly attach the output terminal block 30 on the first end plate 12. That is, by integrating the high voltage output terminal mounting portion 31 and the low voltage output terminal mounting portion 32, a simple structure and high integration are provided. It should be noted that the output terminal block 30 is a plastic member for insulation and protection, thereby providing improved safety.

[0029] Referring to FIGS. 1, 7 to 9, in this embodiment, the screw hole 312 is disposed in the high-voltage output terminal mounting portion 31, and a through hole corresponding to the screw hole 312 is disposed in the high-voltage output sheet 311. By passing a fastening bolt through the through hole of the high-voltage output sheet 311 and connecting it to the screw hole 312, the high-voltage output sheet 311 is fixed to the high-voltage output terminal mounting portion 31. In some embodiments, when two or more battery modules 100 are connected to each other, two adjacent battery modules 100 are electrically connected to each other via a copper bar. Both ends of the copper bar are electrically connected to the high-voltage output sheets 311 of the two battery modules 100. That is, the end portion of the copper bar connected to the high-voltage output sheet 311 is also attached to the associated high-voltage output terminal mounting portion 31. Specifically, a through hole is also provided at the end of the copper bar, and this through hole corresponds to the through hole of the high-voltage output sheet 311 and the screw hole 312. The fastening bolt passes through the through hole of the copper bar and the through hole of the high-voltage output sheet 311 and is connected to the screw hole 312, so that the copper bar and the high-voltage output sheet 311 are fixedly attached in the high-voltage output terminal mounting portion 31.

[0030] Referring to FIGS. 9 to 14, in this embodiment, the limiting portion 33 includes a first limiting portion 331, a second limiting portion 332, and a third limiting portion 333. The first limiting portion 331 and the second limiting portion 332 are formed by extending away from each other in the vertical direction. The third limiting portion 333 is located between the first limiting portion 331 and the second limiting portion 332, and the third limiting portion 333 is arranged in the vertical direction. That is, the first limiting portion 331 and the second limiting portion 332 are located on both sides of the third limiting portion 333 and are formed by extending away from the third limiting portion 333. Through the fixed connection between the plurality of limiting portions and the first end plate 12, the limiting effect is improved, and the reliability of the fixed connection between the limiting portions and the first end plate 12 is ensured.

[0031] 9 to 14, in this embodiment, the limiting groove 121 includes a first limiting groove 1211, a second limiting groove 1212, and a third limiting groove 1213, which correspond to the first limiting portion 331, the second limiting portion 332, and the third limiting portion 333, respectively. The first limiting portion 331, the second limiting portion 332, and the third limiting portion 333 are attached to the first limiting groove 1211, the second limiting groove 1212, and the third limiting groove 1213 in the thickness direction of the first end plate 12, respectively, in order to fix the output terminal block 30 on the first end plate 12. In this way, the limiting portion 33 at the bottom of the output terminal block 30 is unlikely to come off the limiting groove 121 on the first end plate 12, and therefore the limiting effect between the output terminal block 30 and the first end plate 12 is improved.

[0032] 9 to 14, in this embodiment, at least one of the first limiting portion 331 and the second limiting portion 332 is provided with a sub-limiting portion. A sub-limiting groove is provided in a corresponding limiting groove on the first end plate 12, and the sub-limiting portion is connected to the sub-limiting groove by a concave-convex connection to form a limiting structure. For example, the sub-limiting portion may be formed as a first convex portion 3301, and the first convex portion 3301 is provided on the opposite sides of both the first limiting portion 331 and the second limiting portion 332. When the output terminal block 30 is mounted on the first end plate 12 in the thickness direction of the first end plate 12, the first convex portion 3301 is located in the limiting groove 121 to form a limiting structure together with the inner wall of the first end plate 12. Specifically, in this embodiment, a weight-reducing hole 1201 is provided in each of the first end plate 12 and the second end plate. The weight-reducing hole 1201 penetrates the limiting groove 121 or the mounting groove 122 to reduce the weight of the end plate. That is, in this embodiment, a plurality of cavity structures are arranged in the first end plate 12, and the first end plate 12 includes a first side wall 1202 in contact with the cell 20 and a second side wall 1203 away from the cell 20. When the output terminal block 30 is mounted on the first end plate 12 in the thickness direction of the first end plate 12, the first protrusion 3301 is located in the cavity in the first end plate 12 to interfere with the first side wall 1202 to form a limiting structure. In this way, the limiting effect between the output terminal block 30 and the first end plate 12 is further improved, and the output terminal block 30 is further limited.

[0033] 9 to 14, in this embodiment, the limiting groove 121 is formed by extending from the inside to the outside of the first end plate 12 in the thickness direction of the first end plate 12. Here, the side of the first end plate 12 closer to the cell 20 is the inside, and the side away from the cell 20 is the outside. The outer wall of the first end plate 12 closes the end face of the limiting groove 121. That is, the limiting groove 121 passes through the first side wall 1202 in the thickness direction of the first end plate 12 and continues to extend until it reaches the second side wall 1203 in the thickness direction. In this way, by the second side wall 1203 closing the end face of the limiting groove 121, the limiting portion 33 can be attached in the limiting groove 121 only from the inside of the first end plate 12 in the thickness direction of the first end plate 12. Movement of the output terminal block 30 in the thickness direction of the first end plate 12 is restricted by the assembly between the first protrusion 3301 and the second side wall 1203, so that the output terminal block 30 is fixed more satisfactorily.

[0034] In another embodiment, the limiting portion 33 may further be formed as a plurality of elastic members, which are engaged with the limiting grooves, and an interference fit is generated between the elastic members and the limiting grooves through the elastic action of the elastic members, thereby fixing the output terminal block 30 on the first end plate 12.

[0035] 9 to 14, in this embodiment, the multiple cells 20 in the battery module 100 are connected on the cell terminals 201 of the cells 20 through a connection sheet to electrically connect the cells 20 to each other. Furthermore, a high-voltage output sheet 311 is attached to the high-voltage output terminal mounting portion 31, and the high-voltage output sheet 311 is electrically connected to the connection sheet to achieve high-voltage output. In addition, the battery module 100 further includes an FPC assembly. The FPC assembly is welded to the connection sheet that connects different cells 20 in the battery module 100 through a sampling terminal to collect low-voltage information such as electrical signals and temperature signals of the multiple cells 20. In some other embodiments, the battery module 100 further includes a cell contact system assembly, and the cell contact system assembly is electrically connected to the multiple cells 20. The cell contact system assembly includes a sampling assembly and a high-voltage output sheet. Here, the sampling assembly includes a flexible circuit board (not shown) and a low-voltage connector 202. The flexible circuit board is electrically connected to the cells 20. The low-voltage connector 202 is mounted on the low-voltage output terminal mounting portion 32 and electrically connected to the flexible circuit board to output low-voltage information such as electrical signals and temperature signals collected by the sampling assembly. The high-voltage output sheet 311 is mounted on the high-voltage output terminal mounting portion 31 and electrically connected to the cells 20 so as to output the power of the battery module 100 to the electrical equipment for powering the electrical equipment. Here, compared with the structure using a separated FPC assembly and a connection piece to achieve sampling, the cell contact system assembly is easy to install, thereby improving the installation efficiency and grouping efficiency of the battery module.

[0036] 9 to 14, in this embodiment, the low-voltage output terminal mounting portion 32 further includes a hook structure 321. The hook structure 321 is formed by extending from both sides of the upper portion of the low-voltage output terminal mounting portion 32 in a direction away from the low-voltage output terminal mounting portion 32. The output terminal block 30 is further provided with a reinforcing plate 34. The reinforcing plate 34 is mounted on the low-voltage output terminal mounting portion 32 and disposed above the low-voltage connector 202. Both ends of the reinforcing plate 34 are engaged and connected with the hook structure 321, and second protrusions 341 are formed on both ends of the reinforcing plate 34. When the reinforcing plate 34 is mounted on the low-voltage output terminal mounting portion 32, the second protrusions 341 at each end are located between the hook structures 321 on the same side of the low-voltage output terminal mounting portion 32. In this way, the reinforcing plate 34 is fixed on the low-voltage output terminal mounting portion 32, thereby fixing the low-voltage connector 202 and improving the structural strength.

[0037] 1 to 15, the present invention further provides a battery pack. The battery pack includes a case 200, and at least one battery module 100 is provided in the case 200. The structure of the battery module 100 is similar or identical to the battery module 100 described in the above-mentioned embodiments, and therefore the description thereof will not be repeated here.

[0038] The present invention provides a battery module and a battery pack. In the battery module, after the output terminal block is mounted on the end plate, the inner surface of the end plate is close to the body of the cell, so that the limiting part at the bottom of the output terminal block is not easily dislodged from the limiting groove on the end plate, thereby providing a good limiting effect. Furthermore, the high-voltage output terminal mounting part and the low-voltage output terminal mounting part are integrated on the output terminal block. In this way, it provides a simple structure and high integration, and achieves compatibility with the cell contact system assembly. Furthermore, the limiting groove on the end plate can also be used as a weight-reducing hole of the end plate.

[0039] The above description is only an exemplification of the preferred embodiments of the present invention and the applicable technical principles. Those skilled in the art will understand that the scope related to the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but any combination of the above technical features or features equivalent thereto without departing from the concept of the present invention, for example, the technical solutions formed by replacing the above features having the technical features disclosed in the present invention with features having similar functions (but not limited thereto).

[0040] Except for the technical features in this specification, the remaining technical features are known technologies to those skilled in the art. To emphasize the innovative features of the present invention, the remaining technical features will not be repeatedly described here.

Industrial Applicability

[0041] Provided are a battery module and a battery pack that address the problem of poor reliability of the fixation between the high-voltage output terminal and the FPC low-voltage connector in the currently available mounting methods of the output terminal block.

Explanation of Reference Numerals

[0042] Battery module 100, frame 10, cell 20, output terminal block 30, side plate 11, first end plate 12, second end plate 13, high-voltage output terminal mounting portion 31, high-voltage output sheet 311, screw hole 312, low-voltage output terminal mounting portion 32, limiting portion 33, limiting groove 121, mounting groove 122, first limiting portion 331, second limiting portion 332, third limiting portion 333, first limiting groove 1211, second limiting groove 1212, third limiting groove 1213, first convex portion 3301, weight reduction hole 1201, first side wall 1202, second side wall 1203, cell terminal 201, low-voltage connector 202, hook structure 321, reinforcing plate 34, second convex portion 341, box body 200.

Claims

1. a frame including side plates opposed to each other and a first end plate and a second end plate opposed to each other; A plurality of cells stacked and attached to the frame; an output terminal block including a high voltage output terminal mounting portion, a low voltage output terminal mounting portion, and a limiting portion; Including, the high-voltage output terminal mounting portion and the low-voltage output terminal mounting portion are disposed adjacent to each other, and the limiting portion is formed by extending from a bottom of the low-voltage output terminal mounting portion; a limiting groove and a mounting groove are provided on an upper portion of the first end plate, the high voltage output terminal mounting portion is mounted in the mounting groove, and the limiting portion is mounted in the limiting groove to connect the output terminal block to the first end plate; the low-voltage output terminal attachment portion is inserted into the limiting groove in a thickness direction of the first end plate, the limiting groove is formed by extending from an inner side to an outer side of the first end plate in the thickness direction of the first end plate, and an outer wall of the first end plate closes an end face of the limiting groove. Battery module.

2. Further comprising a cell contact system assembly; the cell contact system assembly is electrically connected to the cell, the cell contact system assembly includes a sampling assembly and a high voltage output sheet, the sampling assembly includes a flexible circuit board and a low voltage connector, the flexible circuit board is electrically connected to the cell, the low voltage connector is attached to the low voltage output terminal mounting portion and electrically connected to the flexible circuit board, and the high voltage output sheet is attached to the high voltage output terminal mounting portion and electrically connected to the cell. The battery module according to claim 1 .

3. a screw hole is arranged in the high-voltage output terminal mounting portion, the high-voltage output sheet is attached to the high-voltage output terminal mounting portion, and a through hole corresponding to the screw hole is arranged in the high-voltage output sheet; The battery module according to claim 2 .

4. A plurality of weight-reducing holes are provided in the first end plate or the second end plate, and the weight-reducing holes pass through the limiting groove or the mounting groove; The battery module according to claim 1 .

5. the low-voltage output terminal mounting portion further includes a hook structure, the hook structure being formed by extending from both sides of an upper portion of the low-voltage output terminal mounting portion in a direction away from the low-voltage output terminal mounting portion; The battery module according to claim 2 .

6. Further comprising a reinforcing plate, the reinforcing plate is attached to the low-voltage output terminal mounting portion and positioned above the low-voltage connector, and both ends of the reinforcing plate are engaged with and connected to the hook structures; The battery module according to claim 5 .

7. a protrusion is formed on each end of the reinforcing plate, the protrusion on each end being located between hook structures on the same side of the low-voltage output terminal mounting portion; The battery module according to claim 6 .

8. The limiting portion includes a first limiting portion, a second limiting portion, and a third limiting portion, the first limiting portion and the second limiting portion being formed by extending away from a vertical direction, and the third limiting portion being located between the first limiting portion and the second limiting portion and disposed in the vertical direction; the limiting grooves include a first limiting groove, a second limiting groove, and a third limiting groove, which correspond to the first limiting portion, the second limiting portion, and the third limiting portion, respectively; the first limiting portion, the second limiting portion, and the third limiting portion are attached to the first limiting groove, the second limiting groove, and the third limiting groove, respectively, in the thickness direction of the first end plate to fix the output terminal block; The battery module according to claim 1 .

9. At least one of the first limiting portion and the second limiting portion is provided with a secondary limiting portion, and the secondary limiting groove is provided with a secondary limiting groove, and the secondary limiting portion is connected to the secondary limiting groove by a concave-convex connection; The battery module according to claim 8 .

10. The limiting portion includes a plurality of elastic members, and the elastic members are engaged with the limiting grooves. The battery module according to claim 1 .

11. The output terminal block is made of a plastic material. The battery module according to claim 1 .

12. Including the box body, The battery module according to any one of claims 1 to 11 is attached to the box body. Battery pack.

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