Battery pack

Abstract

The utility model provides a battery pack which comprises a box body, an installation cavity is formed in the box body, an installation opening is formed in the top of the box body, the top of the installation cavity is communicated with the installation opening, and the installation cavity is provided with a bottom wall and a side wall; a plurality of battery cells are arranged, and the plurality of battery cells are sequentially arranged in the mounting cavity along the length direction of the mounting cavity; the press-fitting part is arranged at the tops of the plurality of battery cells, and the press-fitting part is propped against the top surfaces of the plurality of battery cells respectively; wherein the mounting cavity limits the positions of the plurality of battery cells along the length direction and the width direction of the mounting cavity, and the press-fitting part is matched with the mounting cavity to limit the positions of the plurality of battery cells in the height direction in the mounting cavity. The battery pack in the scheme is relatively low in assembly cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery pack. BACKGROUND

[0002] The battery pack usually includes a box body and a plurality of battery cells arranged in the box body. During the production of the battery pack, the plurality of battery cells are usually assembled into a battery cell module in advance, and then the battery cell module is arranged in the box body.

[0003] When the battery cells are grouped, the following methods can be used, for example, the battery cells are stacked according to the design requirements, a die-casting end plate is placed at each end of the battery cell stack, a high-strength long screw is passed through the screw hole on the die-casting end plate, the length of the screw should be long enough, a nut is installed at each end of the screw, and the nut is fastened using a wrench or other tools to tightly press the die-casting end plate at both ends of the battery cell stack, thereby ensuring the stability and fixity of the battery cell stack; or the battery cells are stacked according to the design requirements, a steel band is wound around the periphery of the battery cell stack, and the steel band is fastened using a steel band fastener or other tools to tightly adhere to the surface of the battery cell stack, thereby ensuring the stability and fixity of the battery cell stack; or the battery cells are stacked and placed on a sheet metal or injection molded support according to the design requirements, the size and shape of the support should match the battery cell stack, and the battery cell stack is fixed on the support using screws or other fixing members to ensure the firm connection between the battery cell stack and the support. However, the above-mentioned methods for assembling the battery pack have high costs. SUMMARY

[0004] The main purpose of the utility model is to provide a battery pack to solve the problem of high cost in assembling the battery pack in the related art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a battery pack, which comprises a box body, an installation cavity in the box body, an installation port at the top of the box body, the top of the installation cavity being communicated with the installation port, the installation cavity having a bottom wall and a side wall, the side wall being annularly arranged at the outer periphery of the bottom wall, the side wall comprising two first side walls oppositely arranged along the length direction of the installation cavity and two second side walls oppositely arranged along the width direction of the installation cavity; a plurality of battery cells arranged in the installation cavity and sequentially arranged along the length direction of the installation cavity; and a press-fitting part arranged at the top of the plurality of battery cells and abutting against the top surface of each battery cell; wherein each battery cell has a first surface and a second surface oppositely arranged along the length direction of the installation cavity and a first side and a second side oppositely arranged along the width direction of the installation cavity, the two first side walls of the installation cavity abutting against the first surface of the battery cell at the front end and the second surface of the battery cell at the rear end respectively, and the two second side walls of the installation cavity abutting against the first side and the second side of each battery cell respectively; and the press-fitting part cooperates with the installation cavity to limit the position of the plurality of battery cells in the installation cavity.

[0006] Further, the box has a containing cavity, a top of the containing cavity forms a mounting opening, the battery pack further comprises: a first insulation part arranged at a bottom of the containing cavity; a second insulation part annularly arranged in the containing cavity along a side wall of the containing cavity, the first insulation part and the second insulation part form the mounting cavity in a closed manner.

[0007] Further, the battery cell comprises a body part and a pole post protruding from a top surface of the body part, the pressing part is in insulating contact with the top surface of the body part of the plurality of battery cells.

[0008] Further, the battery pack further comprises: a cover arranged at the opening of the box, the cover is located above the pressing part, the cover applies an action force to the pressing part towards the plurality of battery cells.

[0009] Further, the cover comprises: a cover plate body; a plurality of pressing blocks, the plurality of pressing blocks are arranged at a side of the cover plate body facing the mounting cavity, the plurality of pressing blocks are distributed along a length direction of the pressing part, the pressing blocks are in abutting contact with the pressing part; a reinforcing rib arranged at the side of the cover plate body facing the mounting cavity, the reinforcing rib is arranged between two adjacent pressing blocks, two ends of the reinforcing rib are connected with the corresponding two pressing blocks respectively, a bottom surface of the pressing block is not higher than a bottom surface of the reinforcing rib.

[0010] Further, the battery cell comprises a body part and a pole post protruding from a top surface of the body part, the battery pack further comprises: a conductive row, the pole posts of at least two battery cells are connected through one conductive row, the conductive row protrudes upwards from the pole post of the corresponding battery cell, the pressing part is arranged in a misaligned manner with the conductive row.

[0011] Further, the battery pack further comprises: an insulating film arranged between the upper surface of the body part of the battery cell and the lower surface of the corresponding conductive row, so as to insulate the body part of the battery cell and the conductive row; and / or, an insulating sheet arranged on the upper surface of the conductive row.

[0012] Further, the box has a plurality of mounting cavities, the plurality of mounting cavities are distributed in a width direction of the box, a plurality of battery cells are arranged in each mounting cavity, and a column of battery cells in each mounting cavity is correspondingly provided with at least one pressing part.

[0013] Further, one pressing part is correspondingly arranged between the mutually close edges of two adjacent columns of battery cells; and / or, along the distribution direction of the plurality of mounting cavities, the plurality of columns of battery cells comprises a first column of battery cells and a last column of battery cells, an edge of the first column of battery cells away from the last column of battery cells is correspondingly provided with one pressing part, and / or, an edge of the last column of battery cells away from the first column of battery cells is correspondingly provided with one pressing part.

[0014] Further, at least part of the side wall of the box is a corrugated structure, and at least part of the corrugated structure is arranged opposite to at least part of the plurality of battery cells, the corrugated structure comprises a concave section and a convex section which are spaced and distributed along the height direction, the top of the corrugated structure is the concave section, and the battery pack further comprises: a mounting portion arranged at the top of the concave section, and the pressing portion is detachably connected with the mounting portion.

[0015] The technical scheme of the utility model is applied, the battery cell is arranged in the mounting cavity, and the cavity wall of the mounting cavity in the box and the pressing portion are matched to constrain the stacking of the plurality of battery cells. The cavity wall of the mounting cavity and the pressing portion form three-dimensional limiting (length, width and height directions), without additional metal fasteners or complex supports, the number of parts and the machining process are reduced, and the assembly efficiency is improved.

[0016] Specifically, the mounting cavity and the pressing portion are matched, the two first side walls constrain the position of the plurality of battery cells in the length direction of the mounting cavity, the two second side walls constrain the position of the plurality of battery cells in the width direction of the mounting cavity, the bottom wall of the mounting cavity and the pressing portion constrain the position of the plurality of battery cells in the height direction of the mounting cavity, and in this way, the position of the plurality of battery cells in the mounting cavity can be limited. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application form a part of the application and serve to provide further understanding of the present application, the illustrative embodiments of the present application and its description serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A top view of the box of the battery pack according to the embodiment of the utility model is shown;

[0019] Figure 2 A first perspective view of the battery pack according to the embodiment of the utility model is shown;

[0020] Figure 3 A second perspective view of the battery pack according to the embodiment of the utility model is shown;

[0021] Figure 4 A first perspective view of the battery pack according to the embodiment of the utility model is shown; Figure 3 A partial structure schematic view of A in the middle;

[0022] Figure 5 A first partial structure exploded view of the battery pack according to the embodiment of the utility model is shown;

[0023] Figure 6 A second partial structure schematic view of the battery pack according to the embodiment of the utility model is shown;

[0024] Figure 7A structure schematic view of a cover of a battery pack is shown according to an embodiment of the present application.

[0025] Figure 8 A structure schematic view of a press-fitting part of a battery pack at an edge is shown according to an embodiment of the present application.

[0026] Figure 9 A structure schematic view of a press-fitting part of a battery pack at a middle part is shown according to an embodiment of the present application.

[0027] Among them, the above-mentioned drawings include the following reference signs:

[0028] 10, box body; 101, mounting cavity; 1011, first side wall; 1012, second side wall; 102, placing cavity; 1021, mounting frame;

[0029] 11, first partition plate; 12, second partition plate;

[0030] 20, battery cell; 201, first surface; 202, first side surface;

[0031] 30, press-fitting part; 31, second bending plate; 32, heightening strip;

[0032] 41, first insulation part; 42, second insulation part;

[0033] 50, cover;

[0034] 51, cover plate body; 52, press block; 53, reinforcing rib;

[0035] 61, conductive row;

[0036] 611, insulation film; 6111, first avoiding hole; 6112, second avoiding hole;

[0037] 612, insulation sheet; 6121, third avoiding hole;

[0038] 70, mounting part;

[0039] 80, sealing strip. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0041] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0042] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of providing an illustration of the example embodiments. Technical, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered part of the specification as appropriate. In all examples shown and discussed herein, any specific value is to be interpreted as illustrative only and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and therefore, once an item is defined in one view, it is not necessary to discuss it further in subsequent views.

[0043] As shown in Figures 1 to 5 The battery pack provided by the embodiment of the present application includes a box body 10, a battery cell 20, and a pressing part 30. The box body 10 has an installation cavity 101. The top of the box body 10 has an installation opening. The top of the installation cavity 101 is communicated with the installation opening. The installation cavity 101 has a bottom wall and a side wall. The side wall is annularly arranged at the outer periphery of the bottom wall. The side wall includes two first side walls 1011 arranged oppositely along the length direction of the installation cavity 101 and two second side walls 1012 arranged oppositely along the width direction of the installation cavity 101. The battery cell 20 is arranged in plurality. The plurality of battery cells 20 are arranged in the installation cavity 101 in sequence along the length direction of the installation cavity 101. The pressing part 30 is arranged at the top of the plurality of battery cells 20. The pressing part 30 is respectively abutted with the top surface of the plurality of battery cells 20. The battery cell 20 has a first surface 201 and a second surface arranged oppositely along the length direction of the installation cavity 101 and a first side surface 202 and a second side surface arranged oppositely along the width direction of the installation cavity 101. The two first side walls 1011 of the installation cavity 101 are respectively abutted with the first surface 201 of the battery cell 20 at the head end and the second surface of the battery cell 20 at the tail end. The two second side walls 1012 of the installation cavity 101 are respectively abutted with the first side surface 202 and the second side surface of each battery cell 20. The pressing part 30 cooperates with the installation cavity 101 to limit the position of the plurality of battery cells 20 in the installation cavity 101.

[0044] The technical scheme of the utility model, the electric core 20 is arranged in the installation cavity 101, directly utilizes the cavity wall of the installation cavity 101 inside the box 10 and the cooperation of the press fitting part 30 to constrain the stacking of multiple electric cores 20. Through the cavity wall of the installation cavity 101 and the press fitting part 30 form three-dimensional limit (length, width, height direction), without additional metal fastener or complex support, reduce the number of parts and processing procedure, improve the assembly efficiency.

[0045] Specifically, the cooperation of the installation cavity 101 and the press fitting part 30, two first side walls 1011 constrain the position of multiple electric cores 20 in the length direction of the installation cavity 101, two second side walls 1012 constrain the position of multiple electric cores 20 in the width direction of the installation cavity 101, the bottom wall of the installation cavity 101 and the press fitting part 30 constrain the position of multiple electric cores 20 in the height direction of the installation cavity 101, so setting, can limit the position of multiple electric cores 20 in the installation cavity 101.

[0046] As shown in Figures 3 to 6 Further, the box 10 has a containing cavity, the top of the containing cavity forms an installation opening, the battery pack further includes a first insulation part 41 and a second insulation part 42, the first insulation part 41 is arranged at the bottom of the containing cavity, and the second insulation part 42 is annularly arranged in the containing cavity along the side wall of the containing cavity, and the first insulation part 41 and the second insulation part 42 form the installation cavity 101 in a closed manner. The above-mentioned setting can prevent direct contact between the electric core 20 and the box 10, and avoid safety hazards caused by short circuit between the electric core 20 and the box 10. Moreover, the first insulation part 41 and the second insulation part 42 can provide an additional protective layer for the electric core 20, prevent the electric core 20 from being mechanically damaged, such as collision, extrusion and the like, during installation and use, thereby improving the service life and reliability of the electric core 20.

[0047] In the embodiment of the scheme, the first insulation part 41 and the second insulation part 42 are both rectangular plate structures, so setting can improve the convenience of assembling the first insulation part 41 and the second insulation part 42, and improve the limiting effect of the first insulation part 41 and the second insulation part 42 on the electric core 20.

[0048] Specifically, the electric core 20 includes a body part and a pole column protruding from the top surface of the body part, and the press fitting part 30 is in insulating contact with the top surface of the body part of the multiple electric cores 20. The insulating contact between the press fitting part 30 and the top surface of the body part of the electric core 20 allows the press fitting part 30 and the pole column of the electric core 20 to be arranged in a staggered manner. This staggered design ensures the contact area between the press fitting part 30 and the top surface of the body part of the electric core 20, thereby improving the stability of the press fitting of the press fitting part 30 on the electric core 20. Stable press fitting effect can effectively prevent the electric core 20 from shifting or loosening during use, and ensure the overall structural stability of the battery pack.

[0049] In this embodiment, the main body is a cubic block structure. This configuration can improve the stability of the main body of the battery cell 20 when it comes into contact with the first insulating part 41 and the second insulating part 42, and facilitate the stacking process of the battery cell 20.

[0050] Understandably, the offset design of the pressing part 30 and the terminal of the battery cell 20 makes the installation of the pressing part 30 more convenient. During assembly, the pressing part 30 can be placed directly on the top surface of the battery cell 20 without worrying about interference with the terminal, simplifying the assembly process and improving assembly efficiency.

[0051] like Figure 3 and Figure 7 As shown in the embodiment of this solution, the battery pack further includes a cover 50, which covers the opening of the housing 10 and is located above the pressing part 30. The cover 50 applies a force to the pressing part 30 towards the multiple battery cells 20. The force applied by the cover 50 further enhances the pressing effect of the pressing part 30 on the battery cells 20, ensuring that the battery cells 20 are more securely positioned within the mounting cavity 101, thereby improving the reliability and service life of the battery pack. Furthermore, the cover 50 enhances the overall rigidity of the battery pack, improving its resistance to deformation under external impact or vibration, thus protecting the safety of the battery cells 20 and ensuring stable operation of the battery pack under various operating conditions.

[0052] Furthermore, the cover 50 includes a cover body 51, pressing blocks 52, and reinforcing ribs 53. Multiple pressing blocks 52 are provided, all located on the side of the cover body 51 facing the mounting cavity 101. These pressing blocks 52 are spaced apart along the length of the pressing part 30, and abut against the pressing part 30. Reinforcing ribs 53 are located on the side of the cover body 51 facing the mounting cavity 101, with a reinforcing rib 53 between adjacent pressing blocks 52. The two ends of the reinforcing rib 53 are connected to the corresponding two pressing blocks 52, and the bottom surface of the pressing block 52 is not higher than the bottom surface of the reinforcing rib 53. This arrangement allows the pressing blocks 52 and reinforcing ribs 53 to be alternately distributed along the length of the cover body 51. The arrangement of the pressing blocks 52 and reinforcing ribs 53 enhances the overall rigidity of the cover 50, ensuring a stable structure during force application and preventing deformation or displacement. The pressing block 52 applies force to the pressing part 30 at multiple points. This design can effectively avoid local stress concentration in the pressing part, ensure that the pressing force of the pressing part 30 on the battery cell 20 is more uniform, and improve the stability and uniformity of the force applied by the pressing part 30 on the battery cell 20.

[0053] It can be understood that the bottom surface of the pressing block 52 is lower than the bottom surface of the reinforcing rib 53, that is, the bottom surface of the pressing block 52 protrudes downward from the bottom surface of the reinforcing rib 53, or the bottom surface of the pressing block 52 is flush with the bottom surface of the reinforcing rib 53.

[0054] In the embodiment of the present scheme, the profile of the cover plate body 51 is adapted to the profile of the top of the box body 10, the pressing block 52 is a rectangular plate structure, and the reinforcing rib 53 is a long strip structure. In this way, the structure of the cover body 50 is simple, and the processing of the cover body 50 is facilitated.

[0055] Further, in the embodiment of the present scheme, part of the reinforcing rib 53 also extends along the width direction of the cover plate body 51, one end of the reinforcing rib 53 is connected to the side wall of the pressing block 52 facing the length direction of the cover plate body 51, and the other end extends to the side wall of the cover plate body 51 in the length direction. In this way, the structural strength of the cover body 50 can be further improved.

[0056] As shown in Figure 5 Further, the battery pack further comprises a conductive row 61, the pole of the at least two battery cells 20 is connected through one conductive row 61, the conductive row 61 protrudes upward from the pole of the corresponding battery cell 20, and the press-fitting part 30 is arranged in a staggered manner with the conductive row 61. The conductive row 61 connects the poles of the corresponding battery cells 20 to form a complete circuit, so as to improve the stability of the electrical connection inside the battery pack. Moreover, the conductive row 61 also plays a role of heat dissipation in the battery pack, so as to ensure the normal temperature of the battery module, thereby prolonging the service life of the battery pack.

[0057] The present scheme does not limit the specific number and specific position of the conductive row 61, which can be designed according to the actual use conditions.

[0058] Further, the battery pack further comprises an insulating film 611, the insulating film 611 is arranged between the upper surface of the body part of the plurality of battery cells 20 and the lower surface of the conductive row 61, the insulating film 611 is provided with a plurality of first avoiding holes 6111, the first avoiding holes 6111 are arranged in one-to-one correspondence with the poles of the battery cells 20, and the poles penetrate through the corresponding first avoiding holes 6111; the insulating film 611 is provided with second avoiding holes 6112, at least part of the press-fitting parts 30 penetrate through the second avoiding holes 6112 and are arranged through the second avoiding holes 6112; and / or, at least part of the press-fitting parts 30 are arranged in a staggered manner with the insulating film 611. The arrangement of the insulating film 611 can isolate the direct contact between the conductive row 61 and the body part of the battery cell 20, and improve the insulation effect between the conductive row 61 and the body part of the battery cell 20.

[0059] It can be understood that the special arrangement of the insulating film 611 enables the pressing part 30 to directly contact the body part of the battery cell 20, thereby improving the stability of the pressing of the battery cell 20 by the pressing part 30. If there is an intermediate layer between the pressing part 30 and the battery cell 20, the transmission of the pressing force may be uneven or insufficient. The design of the insulating film 611 avoids the interference of the intermediate layer and ensures the direct transmission of the pressing force.

[0060] In an embodiment of the present scheme, the battery pack further comprises an insulating sheet 612 arranged on the upper surface of the conductive row 61, the insulating sheet 612 is provided with a third avoiding hole 6121, the third avoiding hole 6121 is arranged in correspondence with the second avoiding hole 6112; and / or, at least part of the pressing part 30 is arranged in dislocation with the insulating sheet. The arrangement of the insulating sheet 612 can isolate the direct contact between the conductive row 61 and the cover 50, thereby improving the insulation effect between the conductive row 61 and the cover 50.

[0061] It can be understood that the special arrangement of the insulating sheet 612 enables the pressing part 30 to directly contact the body part of the battery cell 20, thereby improving the stability of the pressing of the battery cell 20 by the pressing part 30. If there is an intermediate layer between the pressing part 30 and the battery cell 20, the transmission of the pressing force may be uneven or insufficient. The design of the insulating film 611 avoids the interference of the intermediate layer and ensures the direct transmission of the pressing force.

[0062] The present scheme does not limit the specific number of the mounting cavities 101 of the battery pack.

[0063] In some embodiments of the present scheme, the number of the mounting cavities 101 is one.

[0064] In an embodiment of the present scheme, the box body 10 is in the shape of a top-opened cuboid, the number of the mounting cavities 101 is two, a plurality of battery cells 20 are arranged in each mounting cavity 101, and at least one pressing part 30 is arranged in a column of battery cells 20 in each mounting cavity 101.

[0065] Further, the two mounting cavities 101 are identical in shape, the cross section of each mounting cavity 101 is rectangular, the length direction of the mounting cavity 101 is the same as the length direction of the box body 10, the width direction of the mounting cavity 101 is the same as the width direction of the box body 10, and the two mounting cavities 101 are distributed along the width direction of the box body 10.

[0066] As shown in FIGS. Figure 1 and Figure 2 In an embodiment of the present scheme, the box body 10 is further provided with a placing cavity 102, the placing cavity 102 is located on the same side of the length direction of the two mounting cavities 101, and the placing cavity 102 is used for placing the BMS module of the battery pack. Further, the placing cavity 102 is further provided with a mounting rack 1021, and the mounting rack 1021 is used for mounting the BMS module of the battery pack.

[0067] Specifically, the box 10 is internally provided with a first partition plate 11, which is located between the placement cavity 102 and one end of the two mounting cavities 101 close to the placement cavity 102, and is made of insulating material; in the embodiment of the present scheme, the first partition plate 11 is of a corrugated structure, and the corrugated structure of the first partition plate 11 is distributed along the height direction. In this way, the structural strength of the first partition plate 11 can be enhanced.

[0068] Further, the box 10 is internally provided with a second partition plate 12, and the two adjacent mounting cavities 101 are separated by the second partition plate 12; the second partition plate 12 is made of insulating material. In the embodiment of the present scheme, the second partition plate 12 is a vertically placed flat plate structure.

[0069] In the present scheme, at least one pressing part 30 is provided corresponding to each column of battery cells 20.

[0070] Specifically, along the distribution direction of the plurality of mounting cavities 101, the plurality of columns of battery cells 20 include a first column of battery cells 20 and a last column of battery cells 20, one pressing part 30 is provided corresponding to the edge of the first column of battery cells 20 away from the last column of battery cells 20, one pressing part 30 is provided corresponding to the edge of the last column of battery cells 20 away from the first column of battery cells 20, and one pressing part 30 is provided corresponding to the mutually approaching edges of the two adjacent columns of battery cells 20. By providing a pressing part 30 between the mutually approaching edges of the two adjacent columns of battery cells 20, the number of pressing parts 30 used can be reduced. This design not only reduces the number of components, but also reduces production costs. Moreover, the above arrangement enables one pressing part 30 to be provided corresponding to each of the two edges of each column of battery cells 20 along the width direction of the mounting cavity 101, thereby improving the stability of pressing each column of battery cells 20.

[0071] Further, the present scheme does not limit the specific shape and number of the insulating film 611 and the insulating sheet 612.

[0072] In the embodiment of the present scheme, the profiles of the insulating film 611 and the insulating sheet 612 are both rectangular structures, and the number of the insulating film 611 and the insulating sheet 612 is both one. The two edge-located pressing parts 30 are arranged in a staggered manner with the insulating film 611 and the insulating sheet 612, i.e., the two edge-located pressing parts 30 are located outside the insulating film 611 and the insulating sheet 612, and the middle-located pressing part 30 is arranged through the insulating film 611 and the insulating sheet 612. In this way, the insulating effect of the insulating film 611 and the insulating sheet 612 can be ensured, while the number of holes in the insulating film 611 and the insulating sheet 612 is reduced, and the convenience of processing the insulating film 611 and the insulating sheet 612 is improved.

[0073] Furthermore, at least a portion of the sidewall of the housing 10 is corrugated, and this corrugated structure is positioned opposite to at least a portion of the plurality of battery cells 20. The corrugated structure of the sidewall of the housing 10 provides high strength and rigidity, effectively enhancing the overall structural strength of the housing. When the battery pack is subjected to external impact or vibration, the corrugated structure can disperse and absorb some of the energy, reducing the impact on the battery cells 20 and lowering the risk of damage to the battery pack.

[0074] Specifically, the corrugated structure includes concave sections and convex sections spaced apart along the height direction. The top of the corrugated structure is a concave section. The battery pack also includes a mounting portion 70, which is disposed on the top of the concave section. The press-fit portion 30 is detachably connected to the mounting portion 70. By setting the top of the corrugated structure as a concave section, and providing a connection point for the mounting portion 70 at the top of the concave section, the side of the concave section facing the interior of the mounting cavity 101 contacts the outer surface of the second insulating portion 42, thereby improving the stability of the support for the second insulating portion 42.

[0075] In this design, the two side walls of the housing 10 extending along its length, corresponding to the portions of the battery cell 20, are corrugated, as are the side walls of the housing 10 at the ends of the two mounting cavities 101 furthest from the placement cavity 102. The remaining portions of the side walls of the housing 10 are flat, plate-like structures. This design enhances the adaptability and design flexibility of the housing 10.

[0076] In this embodiment, the longitudinal cross-sections of both the concave section and the convex section are trapezoidal, and the side of the concave section facing the interior of the mounting cavity 101 is planar. This configuration further enhances the stability of the concave section's support for the second insulating portion 42.

[0077] Furthermore, in the vertical direction, the projection of the mounting portion 70 is located on the recessed section. This arrangement reduces interference between the mounting portion 70 and the second insulating portion 42.

[0078] like Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, this solution does not limit the specific shape of the pressing part 30, as long as the pressing part 30 extends along the distribution direction of the multiple cells 20.

[0079] The two pressing parts 30 located at the edges and the pressing part 30 located in the middle may have the same structure and form or different.

[0080] In some embodiments of this solution, the two pressing portions 30 located at the edges have the same structure and form as the pressing portion 30 located in the middle.

[0081] In the embodiment of the present scheme, the two edge-located press-fit portions are different in structure and form from the middle-located press-fit portion 30.

[0082] Specifically, in the embodiment of the present scheme, both of the two edge-located press-fit portions 30 are first bent plates, and the longitudinal section of the edge-located press-fit portion 30 is approximately C-shaped. The edge-located press-fit portion 30 comprises a top plate, a vertical plate and a bottom plate connected to each other, the top plate and the bottom plate are perpendicular to the vertical plate, the length of the top plate is less than the length of the bottom plate, that is, the two ends of the length of the bottom plate protrude outwardly beyond the two ends of the length of the top plate, and the two ends of the length of the bottom plate are provided with first fastening holes. When the press-fit portion 30 is connected to the corresponding mounting portion 70, the end of the length of the bottom plate is overlapped on the corresponding mounting portion 70, so that the fastener is connected to the corresponding mounting portion 70 through the first fastening hole.

[0083] Further, the battery pack further comprises a sealing strip 80, which is arranged between the outer edge of the length of the top plate of the edge-located press-fit portion 30 and the lower surface of the cover body 50. The sealing strip 80 is arranged between the outer edge of the length of the top plate of the edge-located press-fit portion 30 and the lower surface of the cover body 50, which can effectively prevent moisture from entering the inside of the battery pack from these parts.

[0084] Further, the middle-located press-fit portion 30 comprises a second bent plate 31 and a heightening strip 32 abutting from top to bottom, the longitudinal section of the second bent plate 31 is approximately U-shaped, the second bent plate 31 comprises a first side plate, a horizontal plate and a second side plate connected to each other, the first side plate and the second side plate are perpendicular to the horizontal plate, and the two ends of the length of the horizontal plate are provided with second fastening holes. The length of the heightening strip 32 is less than the length of the second bent plate 31, and the two ends of the length of the second bent plate 31 protrude outwardly beyond the length of the heightening strip 32, and the heightening strip 32 directly contacts the upper surface of the body portion of the corresponding battery cell 20. When the press-fit portion 30 is connected to the corresponding mounting portion 70, the end of the length of the horizontal plate is overlapped on the corresponding mounting portion 70, so that the fastener is connected to the corresponding mounting portion 70 through the second fastening hole. In this way, the structural stability of the middle-located press-fit portion 30 can be improved, and at the same time, the use of materials of the corresponding press-fit portion 30 is reduced, and the cost of the battery pack is reduced.

[0085] From the above description, it can be seen that the above-mentioned embodiments of the present utility model realize the following technical effects:

[0086] 1. Simplify the structure and reduce the cost: by using the cavity wall of the mounting cavity 101 inside the box 10 and the compression part 30, three-dimensional limiting of the battery cell 20 in the length, width and height direction is formed, avoiding the use of additional metal fasteners or complex supports, thereby reducing the number of parts and processing procedures when the battery cell 20 is stacked in the box 10, effectively reducing the manufacturing cost and improving the assembly efficiency.

[0087] 2. Enhance safety performance: The setting of the first insulation part 41 and the second insulation part 42 avoids direct contact between the battery cell 20 and the box 10, preventing the safety hazard caused by short circuit between the battery cell 20 and the box 10. And by setting the insulating film 611 and the insulating sheet 612, the insulation effect between the battery cell 20 and the conductive row 61, the conductive row 61 and the cover 50 is further improved, ensuring the safety of the battery pack during use. The first avoiding hole 6111 on the insulating film 611 is correspondingly arranged with the pole of the battery cell 20, ensuring the accuracy of electrical connection, and the communication between the third avoiding hole 6121 of the insulating sheet 612 and the second avoiding hole 6112 provides convenience for the connection between the conductive row 61 and the battery cell 20.

[0088] 3. Improve the stability and uniformity of assembly: The compression part 30 directly contacts with the body part top surface of the battery cell 20, ensuring the stability of the compression part 30 to the battery cell 20, avoiding the uneven or insufficient transmission of compression force caused by the interference of the middle layer. The setting of the compression block 52 and the reinforcing rib 53 makes the cover 50 maintain a stable structure, realizes the uniform force of the compression part 30, ensures the uniform distribution of the compression force, and enhances the stability of the battery cell 20 in the mounting cavity 101.

[0089] 4. Optimize electrical connection and heat dissipation: By setting the conductive row 61, not only the electrical connection inside the battery pack is stable, but also the heat dissipation effect is achieved, ensuring the normal temperature of the battery module and prolonging the service life of the battery pack.

[0090] 5. Enhance the structural rigidity and protection: The side wall of the box 10 adopts corrugated structure, and at least part of the corrugated structure is arranged opposite to at least part of the battery cell 20, which enhances the overall structural strength of the box 10 and effectively disperses and absorbs the energy when the external force impact or vibration occurs. The setting of the compression block 52 and the reinforcing rib 53 of the cover 50 enhances the overall rigidity and anti-deformation ability of the battery pack, effectively protecting the internal battery cell 20 from external impact or vibration.

[0091] 6. Easy to maintain and upgrade: The compression part 30 and the mounting part 70 at the top of the box 10 are detachably connected, which not only simplifies the assembly process, but also facilitates the maintenance and upgrade of the battery pack, reduces the maintenance cost, and improves the maintainability and flexibility of the battery pack.

[0092] 7. The improved sealing performance: by arranging the sealing strip 80 between the top plate of the press-fitting part 30 at the edge and the lower surface of the cover body 50, the moisture entering the battery pack from the edge is effectively prevented, the sealing performance of the battery pack is improved, and the adaptability of the battery pack in harsh environment is enhanced.

[0093] In the description of the utility model, it is understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship usually based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the restriction of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0094] For the convenience of description, spatial relative terms such as '' above '' '' above '' '' upper surface '' '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures. Thus, the example term '' above '' can include both '' above '' and '' below '' orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.

[0095] In addition, it should be noted that the use of '' first '' '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore can not be understood as the restriction of the protection scope of the utility model.

[0096] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack, characterized in that, The battery pack includes: The housing (10) has an installation cavity (101) inside. The top of the housing (10) has an installation opening. The top of the installation cavity (101) communicates with the installation opening. The installation cavity (101) has a bottom wall and side walls. The side walls are arranged in a ring around the outer periphery of the bottom wall. The side walls include two first side walls (1011) arranged opposite to each other along the length direction of the installation cavity (101) and two second side walls (1012) arranged opposite to each other along the width direction of the installation cavity (101). Multiple battery cells (20) are provided, and the multiple battery cells (20) are arranged sequentially in the mounting cavity (101) along the length direction of the mounting cavity (101); A pressing part (30) is disposed on the top of a plurality of said cells (20), and the pressing part (30) abuts against the top surface of the plurality of said cells (20); The battery cell (20) has a first surface (201) and a second surface disposed opposite to each other along the length direction of the mounting cavity (101), and a first side surface (202) and a second side surface disposed opposite to each other along the width direction of the mounting cavity (101). The two first side walls (1011) of the mounting cavity (101) abut against the first surface (201) of the battery cell (20) located at the beginning end and the second surface of the battery cell (20) located at the end end, respectively. The two second side walls (1012) of the mounting cavity (101) abut against the first side surface (202) and the second side surface of each battery cell (20), respectively. The pressing part (30) cooperates with the mounting cavity (101) to restrict the position of the plurality of battery cells (20) in the mounting cavity (101).

2. The battery pack according to claim 1, characterized in that, The housing (10) has a receiving cavity, the top of which forms the mounting opening, and the battery pack further includes: A first insulating part (41) is provided at the bottom of the accommodating cavity; The second insulating part (42) is arranged in a ring along the side wall of the receiving cavity inside the receiving cavity, and the first insulating part (41) and the second insulating part (42) surround the mounting cavity (101).

3. The battery pack according to claim 1, characterized in that, The battery cell (20) includes a body portion and a terminal post protruding from the top surface of the body portion, and the press-fit portion (30) is in insulating contact with the top surface of the body portion of the plurality of battery cells (20).

4. The battery pack according to claim 1, characterized in that, The battery pack also includes: A cover (50) is provided over the opening of the housing (10), the cover (50) is located above the pressing part (30), and the cover (50) applies a force to the pressing part (30) toward the plurality of cells (20).

5. The battery pack according to claim 4, characterized in that, The cover (50) includes: Cover plate body (51); Multiple pressing blocks (52) are provided. The multiple pressing blocks (52) are all provided on the side of the cover plate body (51) facing the mounting cavity (101). The multiple pressing blocks (52) are distributed at intervals along the length direction of the pressing part (30). The pressing blocks (52) abut against the pressing part (30). A reinforcing rib (53) is provided on the side of the cover plate body (51) facing the mounting cavity (101). The reinforcing rib (53) is provided between two adjacent pressing blocks (52). The two ends of the reinforcing rib (53) are respectively connected to the two corresponding pressing blocks (52). The bottom surface of the pressing block (52) is not higher than the bottom surface of the reinforcing rib (53).

6. The battery pack according to claim 1, characterized in that, The battery cell (20) includes a body portion and an electrode post protruding from the top surface of the body portion, and the battery pack further includes: A conductive bus (61) is provided, through which the terminals of at least two of the battery cells (20) are connected. The conductive bus (61) protrudes upward from the terminal of the corresponding battery cell (20), and the pressing part (30) is offset from the conductive bus (61).

7. The battery pack according to claim 6, characterized in that, The battery pack also includes: An insulating film (611) is disposed between the upper surface of the body portion of the battery cell (20) and the lower surface of the corresponding conductive bus (61) to insulate the body portion of the battery cell (20) and the conductive bus (61); and / or, An insulating sheet (612) is provided on the upper surface of the conductive busbar (61).

8. The battery pack according to claim 1, characterized in that, The housing (10) has a plurality of mounting cavities (101) and the plurality of mounting cavities (101) are spaced apart along the width direction of the housing (10). Each mounting cavity (101) is provided with a plurality of battery cells (20), and each row of battery cells (20) in each mounting cavity (101) is provided with at least one pressing part (30).

9. The battery pack according to claim 8, characterized in that, A pressing part (30) is provided between the adjacent edges of two adjacent rows of the battery cells (20); and / or, Along the distribution direction of the plurality of mounting cavities (101), the plurality of battery cells (20) include a first row of battery cells (20) and a last row of battery cells (20). The first row of battery cells (20) is provided with a pressing part (30) at the edge away from the last row of battery cells (20), and / or, the last row of battery cells (20) is provided with a pressing part (30) at the edge away from the first row of battery cells (20).

10. The battery pack according to claim 1, characterized in that, At least a portion of the sidewall of the housing (10) is a corrugated structure, and at least a portion of the corrugated structure is disposed opposite to at least a portion of the plurality of battery cells (20). The corrugated structure includes concave sections and convex sections spaced apart along the height direction, and the top of the corrugated structure is a concave section. The battery pack further includes: The mounting part (70) is disposed on the top of the concave section, and the press-fit part (30) is detachably connected to the mounting part (70).

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