A battery pack

Abstract

The utility model provides a kind of battery pack, including upper box, lower box, electric core component and electric core positioning groove;Electric core component is installed in the shell of upper box and lower box composition;Electric core positioning groove is integrally installed on lower box, and it has the opening towards upper box, and the modeling of opening is matched with the bottom profile of single electric core in electric core component;Wherein, multiple rows of reinforcing beams are provided in lower box, and reinforcing beam penetrates electric core component and electric core positioning groove.Reinforcing beam separates lower box into several independent partitions, and electric core component and electric core positioning groove are provided with avoiding space along reinforcing beam, and are partitioned installed in the several independent partitions of lower box.The utility model sets electric core positioning groove and reinforcing beam in frame bottom, realizes accurate positioning of electric core and partitioned reinforcement, and improves overall structural strength.It solves the technical problems of structural strength, thermal management and electric core fixing protection caused by the direct integration of electric core into battery pack with simplified module structure.

Description

Technical Field

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

[0002] As a core component of new energy vehicles, power batteries continue to face higher requirements in terms of energy density, safety, cost, and manufacturing efficiency. How to further reduce battery manufacturing costs and improve system integration efficiency has become a key issue that the industry urgently needs to address. CTP (Cell to Pack) technology simplifies the system structure, reduces the number of components, lowers material and manufacturing costs, and improves the space utilization and overall energy density of the battery pack by eliminating the traditional battery module layer and integrating the cells directly into the battery pack.

[0003] Despite the significant advantages of CTP technology, technical challenges remain in areas such as structural strength, consistent thermal management, and cell fixation and protection. For example, directly placing cells within the casing requires addressing issues such as mechanical support, thermal runaway propagation control, and heating uniformity in low-temperature environments. Particularly in cylindrical battery applications, ensuring accurate cell positioning, structural stability, and efficient and uniform thermal management are crucial. Utility Model Content

[0004] This utility model provides a battery pack to solve the technical problems of structural strength, thermal management and cell fixing and protection caused by directly integrating the simplified module structure of the battery cell into the battery pack.

[0005] The present invention provides a battery pack including an upper housing, a lower housing, and a battery cell assembly. The battery cell assembly is installed in the housing formed by the upper housing and the lower housing. The lower housing includes a main body and a top of which are integrally formed multiple rows of battery cell positioning slots and multiple rows of reinforcing beams. The reinforcing beams extend along the width and / or length of the lower housing to divide the multiple rows of battery cell positioning slots into multiple regions. The battery cells in the battery cell assembly are installed in the battery cell positioning slots in different regions, and the side of the outermost battery cell in the same region is in contact with the reinforcing beam.

[0006] In one embodiment of the present invention, the cell positioning groove has multiple openings facing the upper housing, and the shape of the openings matches the bottom contour of a single cell in the cell assembly.

[0007] In one embodiment of the present invention, the opening of the battery cell positioning groove is through, and the inner diameter of the opening facing the lower housing is smaller than the inner diameter facing the upper housing. A protrusion facing the upper housing is provided between adjacent openings.

[0008] In one embodiment of the present invention, an upper liner and a lower liner are stacked between the body of the lower housing and the battery cell positioning groove, and the upper liner closes the opening facing the lower housing.

[0009] In one embodiment of the present invention, a heating wire is installed between the upper liner and the lower liner, and a receiving groove for the heating wire is provided on the lower liner, the trajectory of which corresponds to the distribution position of each battery cell in the battery cell assembly.

[0010] In one embodiment of the present invention, a recess matching the outer contour of the battery cell is provided in the area where the reinforcing beam contacts the battery cell.

[0011] In one embodiment of the present invention, a top cover bracket and a busbar assembly are installed on the top of the battery cell assembly. The top cover bracket has an installation groove for the busbar assembly, and the busbar assembly is used to engage and install the top cover bracket onto the battery cell assembly through the installation groove.

[0012] In one embodiment of the present invention, the bottom of the mounting groove of the upper cover bracket includes a covering area and a through area. The covering area corresponds to the top gap between adjacent cells in the cell assembly, and the through area corresponds to the terminal post of each cell in the cell assembly.

[0013] In one embodiment of the present invention, the busbar assembly extends along the coverage area to the through area, forming an electrical connection between adjacent cells in the cell assembly.

[0014] In one embodiment of the present invention, a positioning post is also provided in the coverage area of ​​the mounting groove, and a positioning hole corresponding to the positioning post is provided on the busbar assembly.

[0015] The beneficial effects of this utility model are as follows: The battery pack proposed in this utility model achieves precise positioning and zoned reinforcement of the battery cells by setting cell positioning grooves and multiple rows of reinforcing beams at the bottom of the frame, and improves the overall structural strength of the box. By using the integrated and modular approach, optimization has been achieved at the level of structural innovation. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram:

[0018] Figure 1 A schematic diagram of the split structure of a battery pack provided in an embodiment of this utility model;

[0019] Figure 2 A cross-sectional structural diagram of a battery pack provided in an embodiment of the present invention;

[0020] Figure 3This is a schematic diagram of the split structure of the lower housing provided in one embodiment of the present utility model;

[0021] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the split structure of a battery cell assembly provided in one embodiment of the present invention;

[0023] Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle.

[0024] The attached figures are labeled as follows:

[0025] 10. Upper housing; 20. Lower housing; 200. Main body; 21. Reinforcing beam; 210. Recess; 30. Cell assembly; 40. Cell positioning groove; 41. Opening; 42. Protrusion; 50. Upper liner; 51. Lower liner; 510. Receiving groove; 60. Upper cover bracket; 61. Mounting groove; 611. Covering area; 612. Through area; 613. Positioning post; 70. Busbar assembly; 71. Positioning hole. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0029] Please see Figures 1 to 6 , Figure 1 A battery pack provided in one embodiment of the present invention includes an upper housing 10, a lower housing 20, and a cell assembly 30. The cell assembly 30 is installed in the housing formed by the upper housing 10 and the lower housing 20. The lower housing 20 includes a body 200 and a multi-row cell positioning groove 40 integrally formed on its top and a multi-row reinforcing beam 21. The reinforcing beam 21 extends along the width and / or length of the lower housing 20 to divide the multi-row cell positioning groove 40 into multiple regions. The cells in the cell assembly 30 are installed in the cell positioning groove 40 in different regions, and the side of the outermost cell in the same region is in contact with the reinforcing beam 21.

[0030] Specifically, in this embodiment of the invention, the battery pack adopts a closed shell structure formed by combining an upper housing 1010 and a lower housing 2020. The lower housing 20 is manufactured using an integrated molding process, with multiple rows of cell positioning grooves 40 and multiple rows of reinforcing beams 21 directly formed on its top surface. The reinforcing beams 21 extend in a strip-like layout along the width and / or length of the lower housing 20, dividing the top of the entire lower housing 20 into several regular independent areas. This integrated molding design ensures the structural continuity between the cell positioning grooves 40 and the reinforcing beams 21, eliminates the stress concentration problem that may exist in traditional welding processes, and improves the overall rigidity and deformation resistance of the housing.

[0031] Furthermore, the battery cells in the battery cell assembly 30 are installed in the battery cell positioning slots 40 in different areas according to design requirements. The battery cell groups in each area form independent modular units, with the circumferential side of the outermost battery cell in direct contact with the vertical wall of the reinforcing beam 21. This contact relationship allows the reinforcing beam 21 to not only serve as an area separator but also as a lateral support structure for the battery cell group. When the battery pack is subjected to external impact or vibration, the reinforcing beam 21 evenly transmits the load to the entire lower housing 20 frame through surface contact, effectively preventing excessive displacement or rotation of the battery cells and ensuring that the battery cells maintain a stable relative position.

[0032] Thus, the integrated structural design of the lower housing 20 significantly simplifies the manufacturing process. All cell positioning slots 40 and reinforcing beams 21 can be manufactured in a single molding process, avoiding the need for multi-part assembly. The number of cells in the multiple areas divided by the reinforcing beams 21 can be determined through thermal management simulation calculations, ensuring a balance between heat generation and dissipation in each area. This zoned layout also facilitates subsequent maintenance; when cells in a certain area need to be replaced, targeted operations can be performed without affecting the structural integrity of other areas.

[0033] Please see the appendix Figures 1 to 3In one embodiment, the cell positioning groove 40 has a plurality of openings 41 facing the upper housing 10, and the shape of the openings 41 matches the bottom contour of a single cell in the cell assembly 30. The area of ​​the reinforcing beam 21 that contacts the cell has a recess 210 that matches the outer contour of the cell.

[0034] Specifically, in this embodiment of the invention, the multiple openings 41 in the cell positioning groove 40 are all arranged facing the upper housing 10, and the contours of these openings 41 match the geometry of the bottom of the individual cell in the cell assembly 30. When the cell is installed, its bottom is smoothly inserted into the cell positioning groove 40 by the guidance of the openings 41, and the groove wall and the side of the cell form a surface contact support, ensuring that the cell is accurately positioned in the radial direction. In addition, the groove body covers the bottom of the cell to prevent the cell from shifting under vibration.

[0035] Furthermore, in the area where the reinforcing beam 21 contacts the side of the battery cell, recesses 210 structures that conform to the outer contour of the battery cell are specially provided. These recesses 210 are distributed in a semi-circular arc shape on the vertical wall of the reinforcing beam 21, and their radius of curvature is consistent with the outer diameter of the battery cell. When the battery cell assembly is installed in place, the circumferential surface of the outermost battery cell fits precisely into these recesses 210, forming a large area of ​​surface contact support. This structure allows the reinforcing beam 21 to not only serve as a regional separator, but also as a lateral limiting mechanism for the battery cell assembly, effectively transferring the radial load from the battery cell to the entire lower housing 20 frame.

[0036] Please see the appendix Figure 3 and Figure 4 In one embodiment, the opening 41 of the cell positioning groove 40 is through, and the inner diameter of the opening 41 facing the lower housing 20 is smaller than the inner diameter facing the upper housing 10. A protrusion 42 facing the upper housing 10 is provided between adjacent openings 41. The cell positioning groove 40 is a thermoformed part.

[0037] Specifically, in this embodiment of the invention, the cell positioning groove 40 adopts a through-hole design of opening 41, ensuring that the entire groove forms a continuous channel, facilitating the smooth insertion and removal of the cell. The inner diameter of opening 41 on the side facing the lower housing 20 is smaller, for example, a partially closed seal is provided on the bottom side of opening 41. This allows the cell to be guided and radially constrained through the inner diameter of opening 41 during the initial installation, preventing the cell from shifting during operation. At the same time, it works in conjunction with the encapsulation of the upper part of the cell assembly 30, such as the upper housing 10, to achieve axial constraint, maintaining a stable cell posture under temperature changes or vibration environments, reducing the risk of stress concentration, thereby improving the overall reliability and service life of the battery pack.

[0038] Furthermore, between the openings 41 of adjacent cell positioning slots 40, protrusions 42 facing the upper housing 10 are provided. These protrusions 42 rise upward from the slot spacing area, forming a physical barrier separating adjacent cells. The protrusions 42 provide additional structural support and isolation, effectively preventing cells from colliding or rubbing against each other under dynamic operating conditions. The protrusions 42 also enhance the overall rigidity of the cell positioning slots 40, optimizing the impact resistance of the battery pack. Their protrusions from the contour of the openings 41 serve as a guide for cell installation, simplifying the installation process.

[0039] Furthermore, the cell positioning slot 40 can be manufactured using a vacuum forming process. This method ensures the smoothness of the slot surface and dimensional consistency, allowing for high-precision measurement of the inner diameter of the opening 41 and the structure of the protrusion 42, avoiding burrs or deformation problems inherent in traditional machining. The lightweight and insulating properties of the vacuum forming material further reduce the weight of the battery pack, improving space utilization. Simultaneously, its elasticity buffers external impacts, protecting the cells from damage. This ensures the reliability of the cell positioning slot 40 in mass production applications and facilitates easy maintenance.

[0040] Please see the appendix Figure 2 and Figure 3 In one embodiment, an upper liner plate 50 and a lower liner plate 51 are provided between the body 200 of the lower housing 20 and the cell positioning groove 40. The upper liner plate 50 closes the opening 41 facing the lower housing 20. A heating wire is installed between the upper liner plate 50 and the lower liner plate 51, and a receiving groove 510 for the heating wire is provided on the lower liner plate 51. The trajectory of the receiving groove 510 corresponds to the distribution position of each cell in the cell assembly 30.

[0041] Specifically, in this embodiment of the invention, a combination structure of an upper liner plate 50 and a lower liner plate 51 that cooperate with each other is provided in the interlayer space between the main body 200 and the cell positioning groove 40. The upper liner plate 50 fits against the bottom opening 41 of the cell positioning groove 40, completely sealing the opening 41 that originally faced the lower housing 20, forming an effective seal. This not only prevents external contaminants from entering the cell mounting area through the opening 41, but also provides a stable mounting base for the heating system. The upper liner plate 50 can be made of high thermal conductivity aluminum alloy material, and its surface is anodized, which enhances its corrosion resistance and improves its thermal radiation efficiency.

[0042] More specifically, the lower liner 51 is located below the upper liner 50, forming a mounting cavity for the heating wire between them. The upper surface of the lower liner 51 has serpentine receiving grooves 510, the trajectories of which have been optimized through thermal simulation to correspond to the distribution position of each battery cell in the battery cell assembly 30. After the heating wire is embedded in the receiving groove 510, its heating part corresponds to the bottom center region of each battery cell, ensuring that heat can be conducted to the battery cell via the shortest path. The depth and width of the receiving groove 510 are carefully designed to ensure a tight fit between the heating wire and the groove wall, minimizing heat loss.

[0043] The trajectory of the receiving slot 510 adopts a non-uniform distribution, increasing the number of heating wire rewinds in areas with dense battery cells and appropriately reducing wiring density in edge areas. This wiring method balances overall heating uniformity and energy efficiency. Simultaneously, the reinforcing rib structure on the lower housing 20 body 20 and the protruding shape of the receiving slot 510 of the lower liner 51 provide complementary support, ensuring both the overall rigidity of the liner assembly and providing a reliable mounting base for the heating wire, ensuring stable operation of the heating system even under vehicle vibration conditions.

[0044] Please see the appendix Figure 1 and Figure 5 In one embodiment, a top cover bracket 60 and a bus assembly 70 are mounted on the top of the battery cell assembly 30. The top cover bracket 60 has a mounting groove 61 for the bus assembly 70, and the bus assembly 70 uses the mounting groove 61 to engage and mount the top cover bracket 60 onto the battery cell assembly 30.

[0045] Specifically, in this embodiment of the invention, the top cover bracket 60 assembled on the top of the battery cell assembly 30 can be injection molded from engineering plastic, and its bottom contour matches the shape of the upper surface of the battery cell assembly 30. The surface of the top cover bracket 60 has mounting grooves 61 corresponding to the number of battery cells, located between adjacent battery cells in the battery cell assembly 30. The bus assembly 70 can be made of stamped aluminum conductive sheets, and its shape can partially or completely fill the mounting grooves 61 of the top cover bracket 60. During assembly, the top cover bracket 60 is first assembled onto the top of the battery cell assembly 30, and then the bus assembly 70 is embedded into the mounting grooves 61 to complete the connection with the top terminal of the battery cell assembly 30. Simultaneously, the top cover bracket 60 is snapped into place between the bus assembly 70 and the battery cell assembly 30.

[0046] Please see the appendix Figure 5 and Figure 6 In one embodiment, the bottom of the mounting groove 61 of the upper cover bracket 60 includes a covering area 611 and a through area 612. The covering area 611 corresponds to the top gap of adjacent cells in the cell assembly 30, and the through area 612 corresponds to the terminal post of each cell in the cell assembly 30.

[0047] Specifically, in this embodiment of the invention, the bottom of the mounting groove 61 of the upper cover bracket 60 adopts a partitioned design, dividing it into a covering area 611 and a through area 612. The covering area 611 forms a continuous shielding layer at the bottom of the mounting groove 61, and its spatial position corresponds to the physical gap between the tops of adjacent cells in the cell assembly 30. This layout ensures that when the upper cover bracket 60 is installed in place, the covering area 611 acts as a barrier over the cell gaps, providing physical support for the bus assembly 70 located at the cell gaps and preventing accidental contact between the cell terminals due to vibration or thermal expansion deformation, thereby effectively preventing potential electrical short circuit risks. The material of the covering area 611 is typically high-strength engineering plastic, whose insulation properties enhance electrical safety and evenly dissipate heat from the top of the cell assembly, reducing the formation of local hot spots. This not only simplifies the assembly process but also provides clear visual guidance for subsequent maintenance, enabling rapid identification of critical areas.

[0048] More specifically, the through area 612 is located at a specific point at the bottom of the mounting groove 61, existing in the form of a circular or square opening 41, each opening 41 aligned with the corresponding terminal position of the battery cell in the battery cell assembly 30. After the battery cell assembly is installed, the through area 612 exposes the terminal to the upper cover bracket 60, ensuring that the bus assembly 70 can directly contact the battery cell terminal for laser welding or electrical connection. This precise alignment eliminates assembly errors, ensures the consistency of the weld pool depth, and improves the reliability and conductivity of the electrical connection.

[0049] Furthermore, the continuous support surface formed by the covered area 611 above the gap between adjacent cells enhances the overall rigidity of the top cover bracket 60, evenly distributing vibration loads throughout the entire cell assembly 30 and reducing local stress concentration. Meanwhile, the through area 612 serves as a functional channel, centrally handling electrical interfaces and ensuring effective terminal connection. This design allows the top cover bracket 60 to maintain a slim structure while also ensuring mechanical strength and thermal management efficiency.

[0050] Please see the appendix Figure 1 and Figure 6 In one embodiment, the bus assembly 70 extends along the coverage area 611 to the through area 612, forming an electrical connection between adjacent cells in the cell assembly 30.

[0051] Specifically, in this embodiment of the invention, the bus assembly 70 extends conductive connecting pieces of a specific shape above the covering area 611. These connecting pieces extend across the covering area 611 and into the through area 612, ultimately forming an electrical connection with the battery cell terminals exposed in the through area 612. This extension path enables the bus assembly 70 to construct a stable bridging structure above the top gap between adjacent battery cells, achieving series and parallel connections between battery cells through the insulating substrate provided by the covering area 611. When current flows through the connecting pieces of the bus assembly 70, the engineering plastic material of the covering area 611 effectively isolates the risk of accidental contact between adjacent conductive components, and its thermal conductivity also helps to evenly distribute the Joule heat generated by the connecting pieces, ensuring the uniformity of the temperature field at the top of the battery cell assembly 30.

[0052] Please see the appendix Figure 6 In one embodiment, a positioning post 613 is also provided in the coverage area 611 of the mounting groove 61, and a positioning hole 71 corresponding to the positioning post 613 is provided on the busbar assembly 70.

[0053] Specifically, in this embodiment of the invention, positioning posts 613 are vertically arranged at specific positions in the coverage area 611. These positioning posts 613 can be integrally injection molded with the coverage area 611 using the same material, and are evenly distributed on the surface of the coverage area 611 corresponding to the cell gaps. Positioning holes 71 are punched out at corresponding positions on the bus assembly 70, and the hole diameter can be interference-fitted with the outer diameter of the positioning posts 613. During assembly, the positioning posts 613 pass through the positioning holes 71 to form a physical constraint, so that the bus assembly 70 is completely fixed in the two-dimensional plane, thereby controlling the axial deviation between the connecting piece and the target pole of each bus assembly 70.

[0054] More specifically, the positioning post 613 serves as a mechanical reference point, completing spatial alignment with the cell terminals before welding the busbar assembly 70, eliminating the need for additional tooling for subsequent laser welding. The height difference between the covered area 611 and the through area 612 of the positioning post 613 also ensures that the busbar assembly 70 maintains an ideal pre-compression distance with the cell terminals during press-fitting, guaranteeing consistent weld penetration. When the battery pack undergoes extreme temperature cycling, the design of the positioning hole 71 allows the busbar assembly 70 to expand and contract slightly in a specific direction, compensating for differences in thermal expansion coefficients between different materials and preventing structural stress at the connection points.

[0055] In summary, the battery pack provided by this utility model achieves precise cell positioning and zoned reinforcement by setting cylindrical cell positioning slots and multiple rows of reinforcing beams at the bottom of the frame, thereby improving the overall structural strength of the housing. Simultaneously, the integration of heating wires on the bottom surface of the cell positioning slots enables efficient and uniform heating of the battery under low-temperature conditions, further enhancing the system's environmental adaptability and safety. Through an integrated and modular approach, further optimizations have been made in structural innovation and thermal management, demonstrating promising engineering application prospects.

[0056] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery pack, characterized in that, include: Upper housing (10) and lower housing (20); A battery cell assembly (30) is installed in a housing consisting of the upper housing (10) and the lower housing (20); The lower housing (20) includes a main body (200) and a top integrally formed multi-row cell positioning groove (40) and multi-row reinforcing beam (21). The reinforcing beam (21) extends along the width and / or length of the lower housing (20) to divide the multi-row cell positioning groove (40) into multiple regions. The cells in the cell assembly (30) are installed in the cell positioning groove (40) in different regions, and the side of the outermost cell in the same region is in contact with the reinforcing beam (21).

2. The battery pack according to claim 1, characterized in that, The cell positioning groove (40) has multiple openings (41) facing the upper housing (10), and the shape of the openings (41) matches the bottom contour of a single cell in the cell assembly (30).

3. The battery pack according to claim 2, characterized in that, The opening (41) of the cell positioning groove (40) is through, and the inner diameter of the opening (41) facing the lower housing (20) is smaller than the inner diameter facing the upper housing (10). A protrusion (42) facing the upper housing (10) is provided between adjacent openings (41).

4. The battery pack according to claim 3, characterized in that, An upper liner (50) and a lower liner (51) are stacked between the body (200) of the lower housing (20) and the cell positioning groove (40), and the upper liner (50) closes the opening (41) facing the lower housing (20).

5. The battery pack according to claim 4, characterized in that, A heating wire is installed between the upper liner plate (50) and the lower liner plate (51), and a receiving groove (510) for the heating wire is provided on the lower liner plate (51). The trajectory of the receiving groove (510) corresponds to the distribution position of each cell in the cell assembly (30).

6. The battery pack according to claim 1, characterized in that, The area of ​​the reinforcing beam (21) in contact with the battery cell has a recess (210) that matches the outer contour of the battery cell.

7. The battery pack according to claim 1, characterized in that, The top of the battery cell assembly (30) is equipped with a top cover bracket (60) and a bus assembly (70). The top cover bracket (60) has a mounting groove (61) for the bus assembly (70), and the bus assembly (70) uses the mounting groove (61) to engage and install the top cover bracket (60) onto the battery cell assembly (30).

8. The battery pack according to claim 7, characterized in that, The bottom of the mounting groove (61) of the upper cover bracket (60) includes a covering area (611) and a through area (612). The covering area (611) corresponds to the top gap of adjacent cells in the cell assembly (30), and the through area (612) corresponds to the terminal post of each cell in the cell assembly (30).

9. The battery pack according to claim 8, characterized in that, The bus assembly (70) extends along the coverage area (611) to the through area (612) and forms an electrical connection between adjacent cells in the cell assembly (30).

10. The battery pack according to claim 8, characterized in that, The mounting groove (61) is further provided with a positioning post (613) in the covered area (611), and the busbar assembly (70) is provided with a positioning hole (71) corresponding to the positioning post (613).

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