Nickel sheet assembly for battery pack and battery pack

Abstract

The utility model relates to the technical field of battery packs, and discloses a nickel sheet assembly for a battery pack and the battery pack, the nickel sheet assembly is assembled on the battery pack, the battery pack is provided with a plurality of battery cells, the nickel sheet assembly comprises a first nickel sheet, the first nickel sheet comprises a first connecting part and a second connecting part which are connected with each other, the first connecting part is in fit connection with the end parts of the plurality of battery cells, and the second connecting part extends in a direction far away from the first connecting part; the second nickel sheet comprises a third connecting part and a fourth connecting part which are connected with each other, the third connecting part is detachably arranged on the second connecting part, and the fourth connecting part extends in the direction far away from the third connecting part; and when the fourth connecting part is connected with the electrical equipment, the battery cell can transmit current to the electrical equipment through the fourth connecting part. The utility model has the advantages that the battery pack production efficiency can be improved, the application flexibility is enhanced, and the maintenance is easy.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a nickel sheet assembly for a battery pack and a battery pack. Background Technology

[0002] In existing battery pack designs, nickel strips, as a key current collector material, are typically used to connect the electrodes between battery cells to ensure efficient current transfer. However, in traditional battery pack assembly processes, two sets of nickel strips are fixed together by welding. While welding technology provides a robust electrical connection, this method has significant problems: First, the welding process requires precise positioning and high operational skills, which not only increases assembly time but also easily leads to human error on the production line, thus reducing overall production efficiency. Second, traditional welding permanently connects two sets of nickel strips, and this fixed structure limits the flexibility of battery packs in different application scenarios. For example, in some cases, users may only need to connect a single set of nickel strips, and the existing welding structure cannot meet this requirement, leading to resource waste and increased costs. Finally, once welding is completed, if one set of nickel strips or a battery cell fails, repair or replacement becomes extremely complex, often requiring the disassembly of the entire battery pack, and may even lead to damage to other components. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: on the one hand, to propose a nickel sheet assembly for battery packs that can improve battery pack production efficiency, enhance application flexibility, and is easy to maintain; on the other hand, to propose a battery pack with high production efficiency and easy maintenance.

[0004] The technical solution adopted by this utility model to solve its technical problem is, on the one hand, to provide a nickel sheet assembly for a battery pack, which is assembled on the battery pack, wherein the battery pack has a plurality of battery cells, characterized in that the nickel sheet assembly includes:

[0005] The first nickel sheet includes a first connecting portion and a second connecting portion that are connected to each other. The first connecting portion is attached to the ends of a plurality of said battery cells, and the second connecting portion extends away from the first connecting portion.

[0006] The second nickel sheet includes a third connecting portion and a fourth connecting portion that are interconnected. The third connecting portion is detachably disposed on the second connecting portion, and the fourth connecting portion extends away from the third connecting portion. When the fourth connecting portion is connected to an electrical device, the battery cell can transmit current to the electrical device through the fourth connecting portion.

[0007] In the nickel sheet assembly for a battery pack described above, the second connecting portion is perpendicularly connected to the first connecting portion, extends toward the other end of the battery cell, and coincides with the projection of the battery cell in the horizontal direction.

[0008] In the aforementioned nickel sheet assembly for a battery pack, an insulating structure is included, which is located between the second connecting portion and the battery cell, and abuts against both the second connecting portion and the battery cell.

[0009] In the aforementioned nickel sheet assembly for a battery pack, one side of the insulating structure is snapped into the battery cell, and the other side is detachably connected to the second connecting portion and the third connecting portion, wherein the second connecting portion can restrict the movement of the insulating structure.

[0010] In the aforementioned nickel sheet assembly for a battery pack, the insulating structure is provided with a plurality of first connecting holes, and the second connecting part and the third connecting part are each provided with a plurality of second connecting holes corresponding one-to-one with the first connecting holes. The connection between the insulating structure, the second connecting part and the third connecting part is completed from top to bottom by fasteners.

[0011] In the aforementioned nickel sheet assembly for a battery pack, the insulating structure is provided with a plurality of receiving grooves corresponding one-to-one with the first connecting hole, and the receiving grooves are in communication with the first connecting hole.

[0012] In the aforementioned nickel sheet assembly for a battery pack, the fastener includes a bolt and a fastening nut, and the receiving groove includes a first receiving cavity and a second receiving cavity that are interconnected. The first receiving cavity is located above the second receiving cavity and is adapted to the size of the fastening nut. The inner diameter of the second receiving cavity is smaller than the inner diameter of the first receiving cavity and allows the bolt to extend into it.

[0013] In the aforementioned nickel sheet assembly for a battery pack, the insulating structure is further provided with a plurality of arc-shaped grooves, each arc-shaped groove being engaged with a single battery cell, and there is a gap between two adjacent arc-shaped grooves.

[0014] In the aforementioned nickel sheet assembly for a battery pack, a bracket is fitted at the end of the battery cell, the bracket has a plurality of through holes for the battery cell to extend into, and the bracket has a positioning groove, the insulating structure has a positioning part that engages with the positioning groove, and the positioning groove can restrict the movement of the insulating structure along the battery cell arrangement direction.

[0015] On the other hand, a battery pack is proposed, comprising:

[0016] The battery cell comprises several cells arranged in a straight line.

[0017] Nickel sheet assembly, the nickel sheet assembly including a first nickel sheet and a second nickel sheet;

[0018] The first nickel sheet includes a first connecting portion and a second connecting portion that are interconnected. The first connecting portion is attached to the ends of a plurality of the battery cells, and the second connecting portion extends away from the first connecting portion.

[0019] The second nickel sheet includes a third connecting portion and a fourth connecting portion that are interconnected. The third connecting portion is detachably disposed on the second connecting portion, and the fourth connecting portion extends away from the third connecting portion. When the fourth connecting portion is connected to an electrical device, the battery cell can transmit current to the electrical device through the fourth connecting portion.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] 1. In this utility model, the third connecting part of the second nickel sheet and the second connecting part of the first nickel sheet are designed to be detachable. This not only simplifies the assembly process and improves production efficiency, but also allows users to flexibly assemble and disassemble the second nickel sheet as needed, choosing to connect a single set of nickel sheets or two sets of nickel sheets to adapt to different application scenarios. Furthermore, the detachable connection method replaces welding, reducing safety hazards caused by poor welding (such as short circuits, overheating, etc.) and effectively improving safety in use.

[0022] 2. In this invention, the second connecting part is perpendicularly connected to the first connecting part, extends towards the other end of the battery cell, and coincides with the projection of the battery cell in the horizontal direction. This design makes the nickel sheet assembly more compact in the battery pack, improves space utilization, and helps reduce the overall volume and weight of the battery pack.

[0023] 3. In this utility model, an insulating structure is added. This insulating structure is located between the second connecting part and the battery cell, and abuts against both the second connecting part and the battery cell. This not only effectively isolates the electrical connection between the nickel sheet and the battery cell, preventing short circuits and other electrical faults and improving the safety of the battery pack, but also avoids direct contact between the two, reducing the possibility of mechanical interference and ensuring the smooth installation and removal of the nickel sheet. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the nickel sheet assembly in this utility model.

[0025] Figure 2 This is an exploded view of the nickel sheet assembly in this utility model.

[0026] Figure 3 This is a schematic diagram of the insulation structure in this utility model.

[0027] Figure 4This is a schematic diagram of the nickel sheet assembly assembled on the battery pack in this utility model.

[0028] Figure 5 This is an exploded view of the battery pack of this utility model.

[0029] Figure 6 This is a cross-sectional view of the battery pack of this utility model.

[0030] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100, first nickel sheet; 110, first connecting part; 120, second connecting part; 121, second connecting hole; 200, second nickel sheet; 210, third connecting part; 220, fourth connecting part; 300, insulating structure; 310, first connecting hole; 320, receiving groove; 321, first receiving cavity; 322, second receiving cavity; 330, arc-shaped groove; 340, positioning part; 341, bent end; 400, fastener; 410, bolt; 420, fastening nut; 430, washer; 500, bracket; 510, positioning groove; 520, through hole; 600, battery cell. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] like Figures 1 to 4 As shown, in this embodiment, a nickel sheet assembly for a battery pack is assembled on the battery pack, which has a plurality of battery cells 600. The nickel sheet assembly includes:

[0037] The first nickel sheet 100 includes a first connecting portion 110 and a second connecting portion 120 that are connected to each other. The first connecting portion 110 is attached to the ends of a plurality of battery cells 600, and the second connecting portion 120 extends away from the first connecting portion 110.

[0038] The second nickel sheet 200 includes a third connecting portion 210 and a fourth connecting portion 220 interconnected. The third connecting portion 210 is detachably disposed on the second connecting portion 120, and the fourth connecting portion 220 extends away from the third connecting portion 210. When the fourth connecting portion 220 is connected to electrical equipment, the battery cell 600 can transmit current to the electrical equipment through the fourth connecting portion 220. Compared with the conventional welding design of the first nickel sheet 100 and the second nickel sheet 200, this application simplifies the assembly process and significantly reduces assembly time and operational difficulty through the detachable connection design of the first nickel sheet 100 and the second nickel sheet 200, thereby improving production efficiency. Furthermore, this design allows the second nickel sheet 200 to be easily disassembled without affecting the performance of the first nickel sheet 100, allowing users to flexibly choose single or double sets of nickel sheets according to actual needs to adapt to different application scenarios. In addition, this design uses a detachable connection method instead of welding, reducing safety hazards caused by poor welding (such as short circuits, overheating, etc.) and effectively improving the safety of use.

[0039] Specifically, such as Figures 1 to 4As shown, in this embodiment, the nickel sheet assembly includes a first nickel sheet 100, a second nickel sheet 200, and an insulating structure 300. Both the first nickel sheet 100 and the second nickel sheet 200 are used to transmit the current from the battery cell 600 to electrical equipment. The insulating structure 300 is used to isolate the electrical connection between the first nickel sheet 100, the second nickel sheet 200, and the battery cell 600, preventing short circuits and other electrical faults.

[0040] In this embodiment, the first nickel sheet 100 includes a first connecting portion 110 and a second connecting portion 120 that are interconnected. The first connecting portion 110 is attached to and welded to the ends of a plurality of battery cells 600, ensuring the reliability of the connection between the first nickel sheet 100 and the battery cells 600, so that the current can be stably transmitted between the battery cells 600 and the electrical equipment. The second connecting portion 120 extends away from the first connecting portion 110, and the extension direction can be towards the other end of the battery cell 600 or away from the other end of the battery cell 600. As a connection structure with the electrical equipment or the second nickel sheet 200, the first nickel sheet 100 can be directly connected to the electrical equipment or connected to the electrical equipment through the second nickel sheet 200.

[0041] In this embodiment, the first connecting portion 110 and the second connecting portion 120 are integrally formed and L-shaped. The second connecting portion 120 is perpendicularly connected to the first connecting portion 110, extends towards the other end of the battery cell 600, and coincides with the horizontal projection of the battery cell 600. This means that the second connecting portion 120 is located above the battery cell 600, effectively reducing the axial space occupied by the battery cell 600, making the layout of the nickel sheet assembly within the battery pack more compact, improving space utilization, and helping to reduce the overall volume and weight of the battery pack.

[0042] In this embodiment, the second nickel sheet 200 includes a third connecting portion 210 and a fourth connecting portion 220 interconnected. The third connecting portion 210 is detachably attached to the second connecting portion 220, enabling a stable connection between the first nickel sheet 100 and the second nickel sheet 200, ensuring stable current transmission. The fourth connecting portion 220 extends away from the third connecting portion 210, and its extension direction is consistent with the arrangement direction of the plurality of battery cells 600, serving as a connection structure for electrical equipment. This design enables convenient connection and disassembly of the first nickel sheet 100 and the second nickel sheet 200, allowing users to flexibly choose to use either the first nickel sheet 100 or the second nickel sheet 200 to connect to electrical equipment without compromising the performance of the first nickel sheet 100, thereby effectively improving the application flexibility of the nickel sheet assembly. Furthermore, the detachable connection, compared to traditional welding, eliminates the need for precise positioning and high operational skills, effectively reducing assembly time and operational difficulty, thereby improving production efficiency. In addition, when the second nickel sheet 200 malfunctions, the faulty part can be quickly disassembled and replaced, which effectively improves the utilization rate of the first nickel sheet 100 and reduces maintenance time and cost.

[0043] Preferably, in this embodiment, the third connecting portion 210 and the fourth connecting portion 220 are integrally formed, wherein the third connecting portion 210 is in the shape of a straight line, the fourth connecting portion 220 is in the shape of an L, and one end of the fourth connecting portion 220 is perpendicularly connected to the third connecting portion 210. This design further ensures the compactness of the nickel sheet assembly structure.

[0044] To prevent short circuits caused by the electrical connection between the first nickel sheet 100, the second nickel sheet 200, and the battery cell 600, this embodiment also includes a plastic insulating structure 300. This insulating structure 300 is located between the second connecting portion 120 and the battery cell 600, and abuts against both the second connecting portion 120 and the battery cell 600. This design not only effectively isolates the electrical connection between the nickel sheet and the battery cell 600, preventing short circuits and other electrical faults and improving the safety of the battery pack, but also avoids direct contact between the two, reducing the possibility of mechanical interference and ensuring smooth installation and removal of the nickel sheet. Furthermore, the insulating structure 300 provides effective support and leverage points for the first nickel sheet 100 and the second nickel sheet 200, making the overall structure of the nickel sheet assembly on the battery pack more stable.

[0045] In this embodiment, one side of the insulating structure 300 is snapped into the battery cell 600, while the other side is detachably connected to the second connecting part 120 and the third connecting part 210. The second connecting part 120 restricts the movement of the insulating structure 300. This design simplifies the installation and removal of the insulating structure 300, reducing operational difficulty. Simultaneously, the limiting position of the insulating structure 300 by the second connecting part 120 ensures its stable position within the battery pack, preventing unstable current transmission due to displacement during charging and discharging.

[0046] In this embodiment, the top of the insulating structure 300 is provided with a plurality of first connecting holes 310, which are arranged in a straight line for forming a detachable connection with the first nickel sheet 100 and the second nickel sheet 200. The second connecting portion 120 and the third connecting portion 210 are each provided with a plurality of second connecting holes 121 corresponding one-to-one with the first connecting holes 310. The insulating structure 300, the second connecting portion 120, and the third connecting portion 210 are connected from top to bottom by fasteners 400. This design not only ensures the strength and stability of the connection, avoiding the risk of loosening or detachment, but also simplifies the installation process, reduces the requirements for installation accuracy, and thus improves assembly efficiency.

[0047] Preferably, in this embodiment, both the first connecting hole 310 and the second connecting hole 121 are round holes, and the second connecting hole 121 passes through the second connecting portion 120 and the third connecting portion 210 respectively, so that the bolt 410 can be smoothly inserted.

[0048] In this embodiment, the fastener 400 includes a bolt 410 and a fastening nut 420. The bolt 410 passes through the second connecting hole 121 and the first connecting hole 310 from top to bottom and extends into the receiving groove 320. A washer 430 is also provided between the bolt 410 and the surface of the third connecting portion 210. This design effectively ensures the strength of the connection, effectively prevents loosening, and also avoids wear on the surface of the third connecting portion 210 caused by the bolt 410 during the tightening process. These improvements not only enhance the reliability and safety of the nickel sheet assembly but also extend its service life, ensuring the stable operation of the battery pack under various operating conditions.

[0049] In this embodiment, the insulating structure 300 is provided with a plurality of receiving grooves 320 corresponding one-to-one with the first connecting holes 310. These receiving grooves 320 are located below the first connecting holes 310, extend from the outside to the inside from the side of the insulating structure 300, and communicate with the first connecting holes 310. They are used to place fastening nuts 420 and allow bolts 410 to extend into them. This design provides installation space for bolts 410, making the installation of fasteners 400 more convenient, especially in confined spaces. Furthermore, it allows the fastening nuts 420 to be hidden inside the insulating structure 300, which is both aesthetically pleasing and reduces the risk of accidental collisions or damage.

[0050] In this embodiment, the receiving groove 320 includes a first receiving cavity 321 and a second receiving cavity 322 that are interconnected. The first receiving cavity 321 is an inverted boss-shaped structure located above the second receiving cavity 322 and adapted to the size of the fastening nut 420. The second receiving cavity 322 is U-shaped, and its inner diameter is smaller than that of the first receiving cavity 321, allowing the bolt 410 to extend into it. The cooperation between the first receiving cavity 321 and the second receiving cavity 322 ensures the stable placement of the fastening nut 420 and the correct installation of the bolt 410, avoiding the risk of loosening or falling off. Furthermore, it ensures the long-term reliability of the nickel sheet assembly, ensuring that the connection stability is not affected even when subjected to vibration or impact during charging and discharging.

[0051] In this embodiment, the insulating structure 300 is further provided with a plurality of n-shaped arc grooves 330. These arc grooves 330 are recessed from bottom to top along the bottom of the insulating structure 300, arranged in a straight line, and opening downwards. Each arc groove 330 engages with a single battery cell 600, and there is a gap between adjacent arc grooves 330. This design effectively isolates the electrical connection between two adjacent battery cells 600, preventing short circuits and other electrical faults, further ensuring the reliability of the connection between the insulating structure 300 and the battery cells 600, and enhancing the stability of the overall structure through the engaging engagement of the arc grooves 330 and the battery cells 600.

[0052] In this embodiment, a bracket 500 is detachably fitted onto the end of the battery cell 600. The bracket 500 has several through holes 520 for the battery cell 600 to extend into, and a U-shaped positioning groove 510 recessed from top to bottom is provided on the top of the bracket 500. The insulating structure 300 has a positioning part 340 on the side opposite to the receiving groove 320 that engages with the positioning groove 510. The positioning groove 510 can restrict the movement of the insulating structure 300 along the arrangement direction of the battery cell 600. Through the engagement of the positioning groove 510 and the positioning part 340, the positioning and initial limiting of the insulating structure 300 are achieved, effectively preventing the insulating structure 300 from shaking when connected to the first nickel sheet 100 and the second nickel sheet 200, and preventing the problem of unstable current transmission caused by the displacement of the insulating structure 300 during charging and discharging.

[0053] Preferably, in this embodiment, the positioning part 340 extends horizontally along the side wall of the insulating structure 300 in a direction away from the receiving groove 320, and has a bent end 341 that bends vertically downward. When the positioning part 340 is inserted into the positioning groove 510, the bent end 341 abuts against the outer wall of the bracket 500, which can restrict the insulating structure 300 from moving axially along the cell 600, and further ensure the stability of the insulating structure 300 after assembly.

[0054] like Figures 4 to 6As shown, this utility model embodiment also provides a battery pack, including:

[0055] The battery cell is 600, and there are several of them arranged in a straight line;

[0056] A nickel sheet assembly, comprising a first nickel sheet 100 and a second nickel sheet 200;

[0057] The first nickel sheet 100 includes a first connecting portion 110 and a second connecting portion 120 that are connected to each other. The first connecting portion 110 is attached to the ends of a plurality of battery cells 600, and the second connecting portion 120 extends away from the first connecting portion 110.

[0058] The second nickel sheet 200 includes a third connecting portion 210 and a fourth connecting portion 220 interconnected. The third connecting portion 210 is detachably mounted on the second connecting portion 120, and the fourth connecting portion 220 extends away from the third connecting portion 210. When the fourth connecting portion 220 is connected to electrical equipment, the battery cell 600 can transmit current to the electrical equipment through the fourth connecting portion 220. By introducing the detachably connected first nickel sheet 100 and second nickel sheet 200, the assembly and maintenance of the battery pack are simplified, reducing operational difficulty and significantly improving production efficiency and maintenance convenience. Furthermore, the modular design of the nickel sheet assembly allows the battery pack to be flexibly configured according to actual needs, adapting to different application scenarios and avoiding resource waste and unnecessary cost increases. In addition, the optimized design of the nickel sheet assembly and the introduction of the insulation structure 300 ensure the safe operation of the battery pack and reduce safety hazards such as short circuits and overheating.

[0059] It should be noted that the nickel sheet assembly in this battery pack has the same structure as the aforementioned nickel sheet assembly, therefore, the structure of the nickel sheet assembly will not be described again.

Claims

1. A nickel sheet assembly for a battery pack, assembled on the battery pack, the battery pack having a plurality of cells, characterized in that, The nickel sheet assembly includes: The first nickel sheet includes a first connecting portion and a second connecting portion that are connected to each other. The first connecting portion is attached to the ends of a plurality of said battery cells, and the second connecting portion extends away from the first connecting portion. The second nickel sheet includes a third connecting portion and a fourth connecting portion that are interconnected. The third connecting portion is detachably disposed on the second connecting portion, and the fourth connecting portion extends away from the third connecting portion. When the fourth connecting portion is connected to an electrical device, the battery cell can transmit current to the electrical device through the fourth connecting portion.

2. A nickel sheet assembly for a battery pack according to claim 1, characterized in that, The second connecting part is perpendicularly connected to the first connecting part, extends toward the other end of the battery cell, and coincides with the projection of the battery cell in the horizontal direction.

3. A nickel sheet assembly for a battery pack according to claim 2, characterized in that, It includes an insulating structure located between the second connecting portion and the battery cell, and abutting against both the second connecting portion and the battery cell.

4. A nickel sheet assembly for a battery pack according to claim 3, characterized in that, One side of the insulation structure is snapped into the battery cell, and the other side is detachably connected to the second connecting part and the third connecting part, and the second connecting part can restrict the movement of the insulation structure.

5. A nickel sheet assembly for a battery pack according to claim 4, characterized in that, The insulating structure is provided with a plurality of first connecting holes, and the second connecting part and the third connecting part are each provided with a plurality of second connecting holes corresponding one-to-one with the first connecting holes. The connection between the insulating structure, the second connecting part and the third connecting part is completed from top to bottom by fasteners.

6. A nickel sheet assembly for a battery pack according to claim 5, characterized in that, The insulating structure is provided with a plurality of receiving grooves corresponding one-to-one with the first connecting hole, and the receiving grooves are connected to the first connecting hole.

7. A nickel sheet assembly for a battery pack according to claim 6, characterized in that, The fastener includes a bolt and a fastening nut. The receiving groove includes a first receiving cavity and a second receiving cavity that are interconnected. The first receiving cavity is located above the second receiving cavity and is adapted to the size of the fastening nut. The inner diameter of the second receiving cavity is smaller than the inner diameter of the first receiving cavity and can accommodate the bolt.

8. A nickel sheet assembly for a battery pack according to claim 4, characterized in that, The insulation structure is also provided with a number of arc-shaped grooves, each arc-shaped groove is engaged with a single battery cell, and there is a gap between two adjacent arc-shaped grooves.

9. A nickel sheet assembly for a battery pack according to claim 3, characterized in that, The end of the battery cell is fitted with a bracket, which has several through holes for the battery cell to extend into, and a positioning groove. The insulating structure has a positioning part that engages with the positioning groove, and the positioning groove can restrict the movement of the insulating structure along the battery cell arrangement direction.

10. A battery pack, characterized in that, include: The battery cell comprises several cells arranged in a straight line. Nickel sheet assembly, the nickel sheet assembly including a first nickel sheet and a second nickel sheet; The first nickel sheet includes a first connecting portion and a second connecting portion that are interconnected. The first connecting portion is attached to the ends of a plurality of the battery cells, and the second connecting portion extends away from the first connecting portion. The second nickel sheet includes a third connecting portion and a fourth connecting portion that are interconnected. The third connecting portion is detachably disposed on the second connecting portion, and the fourth connecting portion extends away from the third connecting portion. When the fourth connecting portion is connected to an electrical device, the battery cell can transmit current to the electrical device through the fourth connecting portion.

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