Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack which comprises a box body, a plurality of battery cells and a confluence assembly, wherein an accommodating space is formed in the box body; the confluence assembly is located in the accommodating space; the plurality of cells are stacked in the accommodating space along a second direction, the confluence assembly is arranged at the end part of the first direction of the cells, and the surface, facing the cells, of the confluence assembly is provided with a confluence part; the end part of the battery cell along the first direction is provided with a pole column, the confluence part is provided with a first assembly groove, and the pole column and the first assembly groove are detachably connected in a concave-convex matching manner, so that the pole column of the battery cell is directly contacted with the confluence part to finish electric connection; according to the battery pack provided by the invention, the battery cell and the confluence part can be separated without destructive disassembly, so that the difficulty in disassembling the battery cell and the risk of damaging peripheral components can be greatly reduced, and the faulted battery cell can be more easily and effectively replaced when the battery pack is overhauled.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs. Background Technology

[0002] With the continuous development of new energy vehicle technology and the increasing demand for its use, the research and development of power batteries, a key component of new energy vehicles, is also ongoing. Blade batteries, due to their structural dimensions being well-suited to module-less battery systems, have been widely used in module-less battery packs.

[0003] Currently, existing module-less battery packs typically include a casing, a busbar assembly, and battery cells. The busbar assembly has a busbar for electrical connection between the battery cells. The battery cells and the busbar are usually welded together. Although this fixing method is relatively reliable, it requires destructive disassembly to separate the battery cells from the busbar assembly during later inspection and maintenance. Furthermore, it is difficult to perform the welding step during subsequent installation. Therefore, the existing connection method between battery cells and the busbar assembly presents a problem of difficulty in inspection and maintenance. Utility Model Content

[0004] In view of this, the present invention provides a battery pack to solve the problem that existing module-less battery packs are difficult to inspect and maintain.

[0005] In a first aspect, the present invention provides a battery pack, comprising: a housing, multiple battery cells, and a current-combining assembly; wherein, the housing has an internal accommodating space; the current-combining assembly is located in the accommodating space along a first direction, and the current-combining assembly has a length in a second direction; the multiple battery cells are stacked in the accommodating space along the second direction, the current-combining assembly is disposed at the end of the battery cells in the first direction, and the surface of the current-combining assembly facing the battery cells has a current-combining portion; the end of the battery cells along the first direction has a terminal post, the current-combining portion has a first mounting groove, and the terminal post and the first mounting groove are detachably connected by a concave-convex fit.

[0006] Beneficial effects: The battery cell's terminals are connected to the first assembly slot of the current collector via a detachable connection. The battery cell's terminals can directly contact the current collector to complete the electrical connection. Compared with the conventional welding connection method, the battery cell can be separated from the current collector without destructive disassembly, which can greatly reduce the difficulty of battery cell disassembly and the risk of damaging surrounding components. When the battery pack is under maintenance, it is easier and more effective to replace the faulty battery cells. This effectively solves the problem of difficult maintenance of existing module-less battery packs.

[0007] In one alternative embodiment, the surface of the busbar facing the battery cell forms a mounting surface, and at least a portion of the mounting surface is recessed in a direction away from the battery cell to form a first mounting groove. One side of the first mounting groove has a first mounting opening, and the electrode enters the first mounting groove through the first mounting opening. The electrode has a boss, and the electrode is limited and engaged with the inner wall of the first mounting groove through the boss.

[0008] Beneficial effects: The first assembly slot has a simple and reliable structure. The first assembly slot and the pole can be detachably connected through their own structure without the need for additional fixing parts. The matching method is simple and reliable.

[0009] In one alternative embodiment, the width of the boss in the second direction gradually increases along the direction closer to the busbar, and the width of the first mounting groove in the second direction gradually decreases along the direction closer to the battery cell.

[0010] Beneficial effects: This type of boss has a larger contact surface with the inner wall of the first assembly groove, making the positioning more reliable when the two are engaged, and also making it less prone to stress concentration.

[0011] In one alternative embodiment, the busbar includes a connecting portion and an assembly portion, adjacent assembly portions are connected by the connecting portion, and a first assembly groove is formed on the assembly portion.

[0012] Beneficial effects: The assembly parts are independently matched with the corresponding terminals, which allows the busbar to also limit the spacing between adjacent cells.

[0013] In one alternative embodiment, the busbar assembly includes a carrier plate extending in a second direction, the carrier plate having a second mounting groove recessed in a direction away from the battery cell on its surface facing the battery cell, and the busbar portion being detachably engaged in the second mounting groove.

[0014] Beneficial effects: The busbar is detachably connected to the carrier plate, which makes it easier and faster to replace the busbar when it malfunctions. Compared with bonding and welding, it causes less damage to the components during maintenance.

[0015] In one optional embodiment, the second assembly groove includes a receiving groove for accommodating the assembly part and a connecting groove for accommodating the connecting part. One side of the second assembly groove has a second assembly port, through which the confluence part enters the second assembly groove.

[0016] Beneficial effects: This type of second assembly slot can better match the structure of the manifold, and the gap generated when the two are in contact is smaller, which can avoid frequent vibration of the manifold in the second assembly port.

[0017] In one alternative embodiment, the width of the assembly portion in the second direction gradually decreases along the direction closer to the battery cell, and the width of the receiving groove in the second direction gradually decreases along the direction closer to the battery cell.

[0018] Beneficial effects: The assembly part and the receiving groove can be detachably connected through their own structure, without the need for additional fixing parts, and the matching method is simple and reliable.

[0019] In one alternative embodiment, the carrier plate is further provided with positioning holes, and at least a portion of the busbar extends outward to form a positioning structure, wherein the busbar is positioned and engaged with the positioning holes through its own positioning structure.

[0020] Beneficial effects: The positioning structure, in conjunction with the positioning holes, can further improve the stability of the busbar and the carrier plate after assembly.

[0021] In one alternative embodiment, the bus assembly further includes a limiting plate extending in a second direction, the limiting plate being assembled with the carrier plate and used to block the second assembly port.

[0022] Beneficial effects: The limiting plate can prevent the busbar from coming out of the second assembly port, effectively improving the reliability and stability of the assembly connection between the busbar and the carrier plate.

[0023] In one alternative embodiment, the first assembly port and the second assembly port face the same side, at least a portion of the limiting plate extends into the first assembly groove and forms a pressing part, and the pole post abuts against the inner wall of the first assembly groove through the pressing part.

[0024] Beneficial effect: This type of limiting plate can further improve the contact reliability between the pole and the busbar. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is an exploded schematic diagram of a battery pack according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 An exploded view of the battery pack cells and busbar assembly being assembled.

[0028] Figure 3 for Figure 2 An exploded view of the busbar assembly shown.

[0029] Figure 4 for Figure 3 An exploded view of one of the busbars in the shown busbar assembly when it was removed;

[0030] Figure 5 for Figure 3 The diagram shown is an exploded view from top of the assembly of the busbar assembly and the battery cell.

[0031] Figure 6 for Figure 3 A partially enlarged schematic diagram of the current collector section of the current collector assembly after it is assembled with the battery cell;

[0032] Figure 7 for Figure 3 The diagram shows a partial 3D view from another perspective after the busbar assembly and battery cells are assembled.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Housing; 101. Storage space; 2. Battery cell; 201. Terminal post; 202. Boss;

[0035] 3. Busbar components;

[0036] 301. Busbar; 3011. First assembly slot; 3012. Assembly surface; 3013. First assembly port; 3014. Connecting part; 3015. Assembly part; 3016. Positioning structure;

[0037] 302, Support plate; 3021, Second assembly slot; 3022, Receiving slot; 3023, Connecting slot; 3024, Second assembly opening; 3025, Positioning hole; 3026, Through slot;

[0038] 303, Limiting plate; 3031, Pressing part; 3032, Observation hole; 4, Cover plate. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0041] According to an embodiment of the present invention, a battery pack is provided, comprising: a housing 1, a plurality of battery cells 2, and a current-combining assembly 3; wherein, the housing 1 has an internal accommodating space 101; the current-combining assembly 3 is located in the accommodating space 101 along a first direction, and the current-combining assembly 3 has a length in a second direction; the plurality of battery cells 2 are stacked in the accommodating space 101 along the second direction, the current-combining assembly 3 is disposed at the end of the battery cells 2 in the first direction, and the surface of the current-combining assembly 3 facing the battery cells 2 has a current-combining portion 301; the end of the battery cells 2 along the first direction has a terminal post 201, the current-combining portion 301 has a first mounting groove 3011, and the terminal post 201 and the first mounting groove 3011 are detachably connected by a concave-convex fit.

[0042] In the battery pack of this embodiment, the terminal 201 of the cell 2 is connected to the first assembly groove 3011 of the current collector 301 via a detachable connection. The terminal 201 of the cell 2 can be electrically connected simply by contacting the current collector 301. Compared with the conventional welding connection method, the cell 2 can be separated from the current collector 301 without destructive disassembly, which can greatly reduce the difficulty of disassembling the cell 2 and the risk of damaging surrounding components. When the battery pack is under maintenance, it is easier and more effective to replace the faulty cells. This effectively solves the problem that the existing module-less battery pack is difficult to maintain and repair.

[0043] In this embodiment, the second direction refers to Figure 4 The "second direction" indicated by the middle arrow can refer to the stacking direction of cell 2, or, in passenger vehicles, the front-to-back direction of the vehicle. The first direction refers to... Figure 4 The "first direction" indicated by the middle arrow can be the length extension direction of cell 2, or the width direction of the vehicle in a passenger car. The third direction refers to... Figure 4 The "third direction" indicated by the middle arrow can be the height direction of cell 2 or the battery pack, or the height direction of the vehicle in passenger cars.

[0044] Additionally, it should be noted that the busbar 301 is a metal component that enables adjacent battery cells 2 to be electrically connected, and multiple battery cells 2 are connected in series through multiple busbars 301.

[0045] Specifically, there is no limitation on the specific detachable connection method between the terminal 201 and the first assembly slot 3011. It can be that two busbar components 3 abut against the corresponding terminal 201 along the first direction, so that the terminal 201 is inserted into the first assembly slot 3011 while clamping the battery cell 2, thereby fixing the battery cell 2 and keeping the busbar 301 in continuous contact with the terminal 201 for electrical connection. Alternatively, it can be that the first assembly slot 3011 is connected to the terminal 201 through a plug-in or snap-fit ​​structure that cooperates with the boss, thereby keeping the busbar 301 in continuous contact with the terminal 201 for electrical connection. The choice can be made flexibly according to the requirements.

[0046] Preferably, the current collector 3 is arranged in pairs, and the current collector 3 is provided at both ends of the battery cell 2 in the first direction.

[0047] In one possible implementation, the surface of the current collector 301 facing the battery cell 2 forms a mounting surface 3012. At least a portion of the mounting surface 3012 is recessed in a direction away from the battery cell 2 to form a first mounting groove 3011. One side of the first mounting groove 3011 has a first mounting opening 3013. The electrode post 201 enters the first mounting groove 3011 through the first mounting opening 3013. The electrode post 201 has a boss 202. The electrode post 201 is limited and engaged with the inner wall of the first mounting groove 3011 through the boss 202. The first mounting groove 3011 has a simple and reliable structure. The first mounting groove 3011 and the electrode post 201 can be detachably connected by their own structure without the need for additional fixing parts. The engagement method is simple and reliable.

[0048] Specifically, the shape of the boss 202 is not limited. It can be a cylindrical or prismatic platform, or a platform with a stepped or inclined surface, as long as it can achieve a limiting fit with the inner wall of the first assembly groove 3011.

[0049] It should be noted that, in order to enable the first mounting groove 3011 to better mate with the boss 202, the cross-sectional shape of the first mounting groove 3011 in the plane along the first direction and the second direction matches the cross-sectional shape of the pole post 201 in the plane along the first direction and the second direction.

[0050] In one possible implementation, the width of the boss 202 in the second direction gradually increases along the direction close to the busbar 301, and the width of the first mounting groove 3011 in the second direction gradually decreases along the direction close to the battery cell 2. In this form, the contact surface between the boss 202 and the inner wall of the first mounting groove 3011 is larger, and the positioning is more reliable when the two are engaged, while also being less prone to stress concentration.

[0051] It should be noted that gradual increase and gradual decrease can be a step-like change or a continuous slope.

[0052] Preferably, such as Figure 5 As shown, the wall surface of the first assembly groove 3011 in the second direction and the wall surface of the boss 202 in the second direction are both inclined planes. When the battery cell 2 moves away from the first assembly groove 3011, this kind of inclined plane cooperation will make the two squeeze more tightly, and make the pole post 201 fit more tightly with the wall surface of the first assembly groove 3011.

[0053] Alternatively, in another possible implementation, an elastic element can be provided between the pole post 201 and the wall of the first mounting groove 3011 along the first direction. Through the action of the elastic element, the inclined plane of the boss 202 and the inclined plane of the first mounting groove 3011 are continuously and tightly fitted.

[0054] In one possible implementation, the busbar 301 includes a connecting part 3014 and an assembly part 3015. Adjacent assembly parts 3015 are connected by the connecting part 3014. A first assembly groove 3011 is formed on the assembly part 3015. The assembly part 3015 independently cooperates with the corresponding terminal post 201, so that the busbar 301 can also limit the spacing between adjacent cells 2.

[0055] Specifically, there is no limitation on the forming method of the busbar 301. It can be formed by machining on a block structure, or by bending or stamping a plate structure. The choice can be made flexibly according to the requirements.

[0056] Furthermore, the number of assembly parts 3015 is not limited, and two or more adjacent assembly parts 3015 can be connected by connecting parts 3014, which can be flexibly selected.

[0057] Preferably, such as Figure 4 As shown, the assembly parts 3015 of each junction 301 are arranged along the second direction, and there are two of them. The first assembly slot 3011 is detachably connected to the pole 201. The junction 301 is formed by connecting multiple sheet-like structures. This type of junction 301 has a simple and reliable structure and uses less material during manufacturing.

[0058] In one possible implementation, the busbar assembly 3 includes a support plate 302 extending along a second direction. The surface of the support plate 302 facing the battery cell 2 has a second mounting groove 3021 recessed in a direction away from the battery cell 2. The busbar portion 301 is detachably engaged in the second mounting groove 3021. The busbar portion 301 is detachably connected to the support plate 302. When the busbar portion 301 malfunctions and needs to be replaced, it can be replaced more conveniently and quickly. Compared with connection methods such as bonding and welding, the damage to the components during maintenance is less.

[0059] Specifically, there is no limitation on the specific detachable connection method of the manifold 301 and the second assembly slot 3021. It can be achieved by snap-fitting through its own structure, or it can be connected to the manifold 301 through other connecting components such as limit pins or bolts. The choice can be made flexibly according to the requirements.

[0060] In addition, the specific form of the carrier plate 302 in the busbar assembly 3 is not limited. It can be an integral long strip structure with multiple busbar sections 301 provided on the carrier plate 302, or it can be a multi-segment structure arranged along the second direction with at least one busbar section 301 provided on each carrier plate 302.

[0061] In one possible implementation, the second assembly groove 3021 includes a receiving groove 3022 for accommodating the assembly part 3015 and a connecting groove 3023 for accommodating the connecting part 3014. One side of the second assembly groove 3021 has a second assembly port 3024. The confluence part 301 enters the second assembly groove 3021 through the second assembly port 3024. This type of second assembly groove 3021 can better match the structure of the confluence part 301, and the gap generated when the two are engaged is smaller, which can avoid the confluence part 301 from vibrating frequently in the second assembly port 3024.

[0062] Alternatively, in another possible implementation, an extrusion layer can be provided on the inner wall of the second assembly groove 3021 so that when the manifold 301 is installed in the second assembly groove 3021, it can be more stably fixed in the second assembly groove 3021.

[0063] In one possible implementation, the width of the assembly part 3015 in the second direction gradually decreases along the direction close to the battery cell 2, and the width of the receiving groove 3022 in the second direction gradually decreases along the direction close to the battery cell 2. The assembly part 3015 and the receiving groove 3022 can be detachably connected through their own structure without the need for additional fixing parts. The matching method is simple and reliable. In addition, the contact surface between the inner wall of the assembly part 3015 and the receiving groove 3022 in this form is larger, and the limiting is more reliable when the two are matched. At the same time, it is not easy to generate stress concentration.

[0064] It should be noted that gradual increase and gradual decrease can be a step-like change or a continuous slope.

[0065] In one possible implementation, the carrier plate 302 is further provided with a positioning hole 3025, and at least a portion of the busbar 301 extends outward to form a positioning structure 3016. The busbar 301 is positioned and engaged with the positioning hole 3025 through its own positioning structure 3016. The engagement of the positioning structure 3016 with the positioning hole 3025 can further improve the stability of the busbar 301 after it is assembled with the carrier plate 302.

[0066] Specifically, the position of the positioning hole 3025 is not limited. It can be located on the inner wall of the second assembly groove 3021 or on the wall surface outside the second assembly groove 3021 of the support plate 302, as long as it is convenient to cooperate with the positioning structure 3016.

[0067] Furthermore, a through groove 3026 is provided on the top of the support plate 302 in the third direction. The opening of the through groove 3026 faces the third direction and extends through the first direction. Each receiving groove 3022 is provided with a corresponding through groove 3026 and communicates with it. The positioning hole 3025 is located on the wall of the through groove 3026 in the third direction and extends along the third direction. The upper end of the assembly part 3015 in the third direction extends outward and bends in multiple segments in the direction away from the battery cell to form a hook-shaped positioning structure 3016. A part of the positioning structure 3016 is inserted into the positioning hole 3025.

[0068] It should be noted that, in order to improve the stability of the positioning structure 3016, two positioning structures 3016 are provided in each through slot 3026.

[0069] As an alternative implementation, if necessary, a positioning structure 3016 may be provided in each through slot 3026.

[0070] The battery pack also has a data acquisition component for electrical connection with the busbar 301 to collect information about the battery cells. Since at least a portion of the positioning structure 3016 is located in the through slot 3026, the data acquisition component can be directly electrically connected to the positioning structure 3016 in the through slot 3026, thereby achieving electrical connection with the busbar 301.

[0071] Furthermore, there are no restrictions on the specific form of the acquisition component. It can be an acquisition component composed of flexible circuit boards and connectors, an acquisition component that acquires data through wire harnesses, or an acquisition component that acquires data through flexible flat cables. The choice is flexible.

[0072] like Figure 7 As shown, the acquisition component can be set on the side of the carrier plate 302 away from the battery cell, and the connection structure of the acquisition component can be electrically connected to the positioning structure 3016 by extending into the through groove 3026.

[0073] In one possible implementation, the busbar assembly 3 further includes a limiting plate 303 extending along the second direction. The limiting plate 303 is assembled and connected to the support plate 302 and is used to block the second assembly port 3024. The limiting plate 303 can prevent the busbar 301 from coming out of the second assembly port 3024, effectively improving the reliability and stability of the assembly connection between the busbar 301 and the support plate 302.

[0074] In order to facilitate the removal of the manifold 301 from the second assembly slot 3021, the limiting plate 303 and the bearing plate 302 are detachably connected. The specific connection method is not limited. It can be fixed by its own slots and blocks, or it can be connected by connecting bolts and other connecting parts.

[0075] In one possible implementation, the first assembly port 3013 and the second assembly port 3024 face the same side, and at least a portion of the limiting plate 303 extends into the first assembly groove 3011 and forms a pressing part 3031. The pole post 201 abuts against the inner wall of the first assembly groove 3011 through the pressing part 3031. This type of limiting plate 303 can further improve the contact reliability between the pole post 201 and the junction part 301.

[0076] Specifically, such as Figure 4 and Figure 7 As shown, the limiting plate 303 is provided with a pressing part 3031 in the first assembly groove 3011 corresponding to each assembly part 3015. The limiting plate 303 moves along the third direction and is assembled and connected with the bearing plate 302, so that the pressing part 3031 passes through the second assembly port 3024 and the first assembly port 3013 in sequence and enters the first assembly groove 3011. The pressing part 3031 can press down on the wall surface of the pole post 201 along the third direction, so as to press the pole post 201 against the wall surface of the first assembly groove 3011 in the third direction.

[0077] In one possible implementation, the limiting plate 303 is also provided with an observation hole 3032, which extends along a third direction and corresponds to the position of the positioning structure 3016. The operator can check whether the positioning structure 3016 is installed in place or whether it has failed through the observation hole 3032.

[0078] In one possible implementation, such as Figure 1 As shown, the battery pack also includes a cover plate 4, which is disposed at the opening of the receiving space 101 of the housing 1. The cover plate 4 is assembled and connected to the housing 1 to block the opening of the receiving space 101.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: The enclosure (1), multiple battery cells (2), and a busbar assembly (3) are also present. The box (1) has an internal storage space (101); The busbar assembly (3) is located in the receiving space (101) along a first direction, and the busbar assembly (3) has a length in a second direction; Multiple battery cells (2) are stacked in the receiving space (101) along a second direction, and the busbar assembly (3) is disposed at the end of the battery cell (2) in a first direction. The busbar assembly (3) has a busbar portion (301) on its surface facing the battery cell (2). The battery cell (2) has a terminal post (201) at its end along the first direction, and the busbar (301) has a first mounting groove (3011). The terminal post (201) and the first mounting groove (3011) are detachably connected by a concave-convex fit.

2. The battery pack according to claim 1, characterized in that, The busbar (301) has a mounting surface (3012) on its surface facing the battery cell (2). At least a portion of the mounting surface (3012) is recessed in a direction away from the battery cell (2) to form the first mounting groove (3011). The first mounting groove (3011) has a first mounting opening (3013) on one side. The pole post (201) enters the first mounting groove (3011) through the first mounting opening (3013). The pole post (201) has a boss (202). The pole post (201) is limited and engaged with the inner wall of the first mounting groove (3011) by the boss (202).

3. The battery pack according to claim 2, characterized in that, The width of the boss (202) in the second direction gradually increases along the direction close to the busbar (301), and the width of the first assembly groove (3011) in the second direction gradually decreases along the direction close to the battery cell (2).

4. The battery pack according to any one of claims 2 or 3, characterized in that, The junction (301) includes a connecting part (3014) and an assembly part (3015). Adjacent assembly parts (3015) are connected through the connecting part (3014), and the first assembly groove (3011) is formed on the assembly part (3015).

5. The battery pack according to claim 4, characterized in that, The busbar assembly (3) includes a support plate (302) extending in a second direction. The support plate (302) has a second mounting groove (3021) recessed in a direction away from the battery cell (2) on its surface facing the battery cell (2). The busbar portion (301) is detachably engaged in the second mounting groove (3021).

6. The battery pack according to claim 5, characterized in that, The second assembly groove (3021) includes a receiving groove (3022) for accommodating the assembly part (3015) and a connecting groove (3023) for accommodating the connecting part (3014). The second assembly groove (3021) has a second assembly port (3024) on one side, and the confluence part (301) enters the second assembly groove (3021) through the second assembly port (3024).

7. The battery pack according to claim 6, characterized in that, The width of the assembly part (3015) in the second direction gradually decreases along the direction close to the battery cell (2), and the width of the receiving groove (3022) in the second direction gradually decreases along the direction close to the battery cell (2).

8. The battery pack according to claim 5, characterized in that, The support plate (302) is also provided with a positioning hole (3025), and at least a portion of the confluence part (301) extends outward to form a positioning structure (3016). The confluence part (301) is positioned and cooperates with the positioning hole (3025) through its own positioning structure (3016).

9. The battery pack according to claim 6, characterized in that, The busbar assembly (3) further includes a limiting plate (303) extending along the second direction, the limiting plate (303) being assembled and connected to the bearing plate (302) and used to block the second assembly port (3024).

10. The battery pack according to claim 9, characterized in that, The first assembly port (3013) and the second assembly port (3024) face the same side. At least a portion of the limiting plate (303) extends into the first assembly groove (3011) and forms a pressing part (3031). The pole post (201) abuts against the inner wall of the first assembly groove (3011) through the pressing part (3031).

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