Battery frame and battery pack

Abstract

A battery frame and a battery pack. The battery frame comprises two X-direction side plates (110), two Y-direction side plates (120) and a cover plate (140). Each Y-direction side plate (120) comprises a transverse plate (121) and a vertical plate (122) vertically arranged on the transverse plate (121), wherein the transverse plate (121) and the vertical plate (122) are of an integrated structure. The two Y-direction side plates (120) are arranged opposite each other in a Y direction and are connected by means of the transverse plates (121). A plurality of first cooling liquid flow channels (1211) arranged at intervals in the Y direction are provided on the transverse plates (121). The two X-direction side plates (110) are arranged opposite each other in an X direction, wherein two ends of each Y-direction side plate (120) in the X direction are respectively connected to the two X-direction side plates (110), and the two Y-direction side plates (120) and the two X-direction side plates (110) enclose and form a frame structure having an opening at one end. The cover plate (140) covers the opening of the frame structure.

Description

Battery frame and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2024 with application number 202411045649.5, and claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2024 with application number 202421846971.3. The entire contents of the above applications are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the technical field of energy storage batteries, for example, to a battery frame and a battery pack.

[0004] Background Art

[0005] With the rapid development of the new energy vehicle market, the performance and safety of power batteries, as core components of new energy vehicles, have become crucial factors in determining vehicle performance and market competitiveness. As a key component that supports and protects the power battery, the strength of the battery pack's frame structure is directly related to the battery's safety performance and the vehicle's service life.

[0006] The storage space inside the battery pack can accommodate multiple battery modules, which come in the following two forms: 1) The battery module adopts a battery module form, that is, the battery module has end plates and side plates, and the end plates or side plates are installed on the mounting beams inside the battery pack, resulting in a more complex structure of the entire battery pack, and the height of the mounting beam is usually less than 30mm. Therefore, the mounting beam does not contribute much to the overall rigidity of the battery pack; 2) The battery module adopts a module-free design, and the battery cells of the battery module are fixed to the battery frame by gluing at the bottom.

[0007] Technical issues

[0008] When the battery pack size is large, both of the above-mentioned battery pack structures are difficult to meet the stiffness and modal requirements.

[0009] Technical Solutions

[0010] In a first aspect, the present application provides a battery frame, comprising:

[0011] Two Y-direction side plates, each of the Y-direction side plates includes a transverse plate and a vertical plate erected on the transverse plate, the transverse plate and the vertical plate of each Y-direction side plate are an integrated structure, the two Y-direction side plates are arranged opposite each other along the Y direction and connected by the transverse plate, and the transverse plate is provided with a plurality of first coolant flow channels spaced apart along the Y direction;

[0012] Two X-direction side plates, the two X-direction side plates are arranged opposite to each other along the X-direction, and each Y-direction side plate is connected to the two X-direction side plates at both ends along the X-direction, and the two Y-direction side plates and the two X-direction side plates are surrounded to form a frame structure with one end open;

[0013] a cover plate, arranged to cover the opening of the frame structure;

[0014] The X direction and the Y direction are perpendicular to each other.

[0015] In a second aspect, the present application further provides a battery pack, comprising:

[0016] A battery module comprising a plurality of battery packs stacked along the Y direction, each of the battery packs comprising at least two battery cells spaced apart along the X direction, wherein the thickness direction of the battery cells is parallel to the Y direction;

[0017] In the battery frame as described above, the battery module is arranged in the battery frame, and the large surface of the battery cell of the battery cell unit is opposite to the vertical plate 122 of the Y-direction side plate of the battery frame.

[0018] In some embodiments, along the Y direction, a heat insulating buffer is provided between two adjacent battery packs.

[0019] Beneficial effects

[0020] The present application provides a battery frame. By providing a Y-direction side plate with an integrally formed horizontal plate and vertical plate, when the battery module expands after long-term use, the expansion force can be applied to the vertical plate of the Y-direction side plate. The horizontal plate can apply a force toward the interior of the battery frame to the vertical plate, thereby enhancing the vertical plate's ability to resist deformation, thereby enabling it to meet the battery pack's requirements for stiffness and modality, and to be suitable for carrying large-sized battery modules. By providing a first coolant flow channel on the horizontal plate, the battery module can be cooled and dissipated. Compared with traditional battery frames, this design is equivalent to integrating a water-cooled plate into the Y-direction side plate. The Y-direction side plate can not only realize the load-bearing function of the battery module but also play the role of cooling and dissipating the heat of the battery module. On the other hand, it can also reduce the types and number of parts and components, thereby reducing processing costs. The battery frame has a simple structure and can reduce the material used for structural parts. The connection surface between the X-direction side plate, the Y-direction side plate and the cover plate is reduced, thereby reducing processing costs.

[0021] The present application also provides a battery pack, which can improve the overall stiffness and modality of the battery pack by applying the above-mentioned battery frame.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a battery pack hidden cover and part of a battery module provided by some implementations of the present application;

[0024] FIG2 is a schematic diagram of an exploded structure of a battery module provided by some implementations of the present application;

[0025] FIG3 is a schematic diagram of the structure of a battery frame provided by some implementations of the present application;

[0026] FIG4 is a schematic diagram of an exploded structure of a battery frame provided by some implementations of the present application;

[0027] FIG5 is a partial enlarged view of point A in FIG4;

[0028] FIG6 is a schematic structural diagram of an X-direction side plate provided by some implementations of the present application at one viewing angle;

[0029] FIG7 is a schematic structural diagram of an X-direction side plate provided by some implementations of the present application from another perspective;

[0030] FIG8 is a partial enlarged view of point B in FIG3;

[0031] FIG9 is a schematic structural diagram of a Y-direction side plate provided by some implementations of the present application;

[0032] FIG10 is a schematic structural diagram of a base plate provided by some implementations of the present application;

[0033] FIG11 is a partial enlarged view of point C in FIG10;

[0034] FIG12 is a schematic diagram of a partial structure of a battery frame provided by some implementations of the present application.

[0035] In the picture:

[0036] 100, battery frame; 110, X-direction side plate; 111, first extension plate; 112, second extension plate; 113, third extension plate; 120, Y-direction side plate; 121, horizontal plate; 1211, first coolant flow channel; 1212, connecting slot; 122, vertical plate; 1221, avoidance portion; 130, bottom plate; 131, connecting protrusion; 132, second coolant flow channel; 140, cover plate;

[0037] 200, battery module; 210, battery pack; 211, battery cell;

[0038] 310, side reinforcement plate; 320, end reinforcement plate;

[0039] 400. Anti-collision buffer parts.

[0040] Modes for Carrying Out the Invention

[0041] The embodiments of the present application provide a battery frame and a battery pack with high structural strength, which can be suitable for supporting large-size battery modules, can improve the overall stiffness and modality of the battery pack, and can reduce processing costs.

[0042] Figure 1 shows a schematic structural diagram of a hidden cover plate of a battery pack and a portion of a battery module 200 provided in this embodiment. As shown in Figure 1, this embodiment provides a battery pack, which includes a battery frame 100 and a battery module 200, and the battery module 200 is disposed in the battery frame 100. The battery frame 100 serves to carry and protect the battery module 200. Optionally, there are multiple battery modules 200, and the multiple battery modules 200 are arranged at intervals along the X direction and disposed in the battery frame 100 to improve the battery capacity, voltage, load, safety and stability of the battery pack.

[0043] Figure 2 shows an exploded view of a battery module 200 according to this embodiment. As shown in Figure 2 and in conjunction with Figure 1 , in this embodiment, the battery module 200 includes multiple battery packs 210 stacked along the Y-direction. Each battery pack 210 includes at least two battery cells 211 spaced apart along the X-direction. Compared to conventional battery modules, the battery module 200 according to this embodiment can omit end plates and steel strips. When placed within the battery frame 100, this reduces the distance between the thicknesses of the multiple side plates, allowing for a smaller width when the same number of battery modules are assembled, thereby improving space utilization and overall energy density. Furthermore, the expansion force of the battery module 200 can be applied directly to the battery frame 100. Compared to conventional battery module designs that concentrate expansion force on the end plates and steel strips, the interaction area between the battery module 200 and the battery frame 100 is larger. Furthermore, the strength of the end plates and steel strips themselves is significantly lower than that of the entire battery frame 100. Consequently, the battery frame 100 exhibits improved rigidity and resistance to expansion force.

[0044] The X-direction specifically refers to the width of the battery cell 211, the Y-direction specifically refers to the thickness of the battery cell 211, and the Z-direction specifically refers to the height of the battery cell 211. The X-direction, Y-direction, and Z-direction are all perpendicular to each other. The outward-facing surfaces of the battery cells 211 in the two battery packs 210 at the ends of each battery module 200 are the large cell surfaces. During operation, the expansion force generated by the battery module 200 is greatest along the Y-direction, which is perpendicular to the large cell surfaces.

[0045] Optionally, a thermal insulation buffer is provided between two adjacent battery packs 210. The thermal insulation buffer is used to reduce the spread of thermal runaway of the battery cell 211 due to excessive temperature to the entire battery module 200. It can also prevent the adverse effects on battery pack performance caused by excessive expansion force of the battery module 200. Optionally, the thickness of the thermal insulation buffer ranges from 3mm to 5mm. Exemplarily, the thickness of the thermal insulation buffer can be 3.2mm, 3.4mm, 3.5mm, 3.8mm, 4.0mm, 4.2mm, 4.5mm, 4.6mm, 4.8mm, etc.

[0046] In this embodiment, the width of the thermal insulation buffer equals the sum of the widths of all the battery cells 211 in each battery pack 210. This design allows the thermal insulation buffer to completely cover the large surface of all the battery cells 211 in each battery pack 210, achieving optimal thermal insulation and buffering effects. Optionally, both sides of the thermal insulation buffer can be adhered to the corresponding battery pack 210, providing convenient operation and a secure connection.

[0047] Optionally, two adjacent battery cells 211 in each battery pack 210 are connected by double-sided tape or glue, which is simple, convenient, and the connection is tight. In this embodiment, three battery modules 200 are provided in the battery frame 100, and a single battery pack 210 in each battery module 200 includes two battery cells 211. Designers can adjust the number of battery modules 200 provided in the battery frame 100 and the number of battery cells 211 in a single battery pack 210 according to actual production needs. However, as the size of the battery module 200 increases, the battery frame 100 in the related art is difficult to meet the stiffness and modal requirements of the battery pack.

[0048] Figure 3 is a schematic structural diagram of the battery frame 100 provided in this embodiment. Figure 4 is a schematic structural diagram of the exploded battery frame 100 provided in this embodiment. Figure 5 is a partial enlarged view of Figure 4 at point A. Figure 12 is a schematic structural diagram of a portion of the battery frame provided in this embodiment. As shown in Figures 3 to 5 and in combination with Figures 1 and 12, this embodiment also provides a battery frame 100, which includes two X-direction side plates 110, two Y-direction side plates 120 and a cover plate 140. Each Y-direction side plate 120 includes a horizontal plate 121 and a vertical plate 122 erected on the horizontal plate 121. The horizontal plate 121 and the vertical plate 122 of each Y-direction side plate 120 are an integrated structure, and the two Y-direction side plates 120 are arranged relatively along the Y direction. , and are connected by a horizontal plate 121, and a plurality of first coolant flow channels 1211 arranged at intervals along the Y direction are opened on the horizontal plate 121; the two X-direction side plates 110 are arranged opposite to each other along the X direction, and each Y-direction side plate 120 is connected to the two X-direction side plates 110 at both ends along the X direction, and the two Y-direction side plates 120 and the two X-direction side plates 110 are surrounded to form a frame structure with one end open; the cover plate 140 is covered at the opening of the frame structure, and the large surface of the battery cell single body 211 is opposite to the vertical plate 122 of the Y-direction side plate 120. In this embodiment, the X-direction side plate 110, the Y-direction side plate 120 and the cover plate 140 are arranged to form a frame structure with an internal cavity and an open top. The battery module 200 is accommodated in the internal cavity of the battery frame 100. When the battery module 200 is assembled in the battery frame 100, the large surface of the battery cell is opposite to the vertical plate 122 of the Y-direction side plate 120, that is, the Y-direction side plate 120 is the main part that bears the expansion force of the battery module 200.

[0049] The battery frame 100 provided in this embodiment is provided with a Y-direction side plate 120 having an integrally formed horizontal plate 121 and a vertical plate 122. When the battery module 200 expands after long-term use, the expansion force can be applied to the vertical plate 122 of the Y-direction side plate 120. The horizontal plate 121 can apply a force toward the interior of the battery frame 100 to the vertical plate 122, thereby enhancing the ability of the vertical plate 122 to resist deformation, thereby enabling it to meet the stiffness and modal requirements of the battery pack and be suitable for carrying large-sized battery modules 200; by providing a first coolant flow channel 1211 on the horizontal plate 121, the battery module 200 can be cooled and dissipated. Compared with the traditional battery frame, this design is equivalent to integrating a water-cooling plate on the Y-direction side plate 120. The Y-direction side plate 120 can realize the carrying function of the battery module 200 while also playing the role of cooling and dissipating heat to the battery module 200. On the other hand, it can also reduce the types and quantity of components and reduce processing costs. The battery frame 100 has a simple structure and can reduce the material used for structural parts. The connection surfaces between the X-direction side plate 110, the Y-direction side plate 120 and the cover plate 140 are reduced, and the processing cost is reduced.

[0050] FIG6 is a schematic structural diagram of the X-direction side plate 110 provided in this embodiment from one perspective. FIG7 is a schematic structural diagram of the X-direction side plate 110 provided in this embodiment from another perspective. FIG8 is a partial enlarged view of FIG3 at point B. As shown in FIG6-FIG8 and in combination with FIG3, both ends of the X-direction side plate 110 along the Y direction are provided with a first extension plate 111 extending inwardly in the X direction, and the first extension plate 111 is partially attached to and connected to the vertical plate 122 on the corresponding side. By providing the first extension plate 111, the contact area between the X-direction side plate 110 and the vertical plate 122 can be increased, the connection strength between the two can be improved, and the structural strength of the entire battery frame 100 can be improved to a certain extent. In this embodiment, the first extension plate 111 is connected to the vertical plate 122 on the corresponding side by welding, that is, the X-direction side plate 110 and the Y-direction side plate 120 are connected by edge welding, which is stable and has high structural strength. With this design, the Y-direction side plate 120 can also be structurally pre-tightened and fixed by the X-direction side plate 110. The X-direction side plate 110 can support and protect the Y-direction side plate 120, so that when the battery module 200 expands during operation, the X-direction side plate 110 can share part of the expansion force, thereby reducing the extrusion deformation of the Y-direction side plate 120 when the battery module 200 expands, and improving the structural strength of the battery frame 100.

[0051] Optionally, a second extension plate 112 is provided on the top of the X-direction side plate 110, extending outward in the X direction. The second extension plate 112 is partially attached to and connected to the cover plate 140. This design can increase the contact area between the X-direction side plate 110 and the cover plate 140, improve the connection strength between the two, and to a certain extent improve the structural strength of the entire battery frame 100. In this embodiment, the cover plate 140 and the second extension plate 112, as well as the cover plate 140 and the Y-direction side plate 120, are pre-tightened and fixed by connecting bolts. The cover plate 140 cooperates with the X-direction side plate 110 to support and protect the Y-direction side plate 120. When the battery module 200 expands during operation, the cover plate 140 is configured to share the expansion force of the battery module 200 along the Z direction, thereby reducing the extrusion deformation of the Y-direction side plate 120 caused by the battery module 200 during expansion, thereby improving the structural strength of the battery frame 100.

[0052] Optionally, a third extension plate 113 is provided extending inwardly in the X-direction from the bottom edge of the X-direction side plate 110. The third extension plate 113 partially abuts and connects to the corresponding transverse plate 121. This design can increase the contact area between the X-direction side plate 110 and the transverse plate 121, improving the connection strength between the two, thereby enhancing the structural strength of the entire battery frame 100 to a certain extent. In this embodiment, the third extension plate 113 can be connected to the transverse plate 121 by welding. In other embodiments, the third extension plate 113 and the transverse plate 121 can also be connected by bolts.

[0053] The inner side of the X-direction side plate 110 refers to the side of the X-direction side plate 110 facing the battery module 200, that is, the side of the X-direction side plate 110 facing the internal cavity of the battery frame 100; the outer side of the X-direction side plate 110 refers to the side of the X-direction side plate 110 facing away from the battery module 200, that is, the side of the X-direction side plate 110 facing away from the internal cavity of the battery frame 100.

[0054] In this embodiment, the Y-direction side plate 120 is made of aluminum profile. Optionally, the Y-direction side plate 120 is made of 6-series aluminum profile, which has the advantages of high strength, light weight and easy processing compared to other series of aluminum profiles.

[0055] In some embodiments, the X-direction side panels 110 are made of 6-series aluminum profiles to improve the structural strength of the X-direction side panels 110. In other embodiments, the X-direction side panels 110 can also be formed by bending sheet metal. Since the expansion force of the battery module 200 is mostly applied to the Y-direction side panels 120 when the battery module 200 expands, the X-direction side panels 110 formed using a sheet metal bending process can also meet the stiffness and modal requirements of the battery frame 100. When preparing the X-direction side panels 110, die-cast aluminum or sheet metal bending reinforcement structures are provided at the corners of the main body of the X-direction side panels 110, the first extension panel 111, the second extension panel 112, and the third extension panel 113 to reduce the use of structural components such as sealing pins. Compared to battery frames in related arts, the battery frame 100 has fewer connection surfaces when connecting the X-direction side panels 110, the Y-direction side panels 120, and the cover panel 140, thereby saving processing costs to a certain extent.

[0056] Optionally, the thickness of the X-direction side plate 110 ranges from 2 mm to 3.5 mm; the thickness of the Y-direction side plate 120 ranges from 2 mm to 3.5 mm. For example, the thickness of the X-direction side plate 110 can be 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, etc.; the thickness of the Y-direction side plate 120 can be 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, etc. In this embodiment, the thickness of both the X-direction side plate 110 and the Y-direction side plate 120 can be 2.5 mm. Considering that the Y-direction side plate 120 is subject to a greater expansion force from the battery module 200, the thickness of the Y-direction side plate 120 can also be set to be greater than that of the X-direction side plate 110. Designers can adjust the thickness of both according to actual needs to ensure the structural strength of the entire battery frame 100.

[0057] Figure 9 shows a schematic structural diagram of the Y-direction side plate 120 provided in this embodiment. As shown in Figure 9 and in conjunction with Figure 5 , in this embodiment, the Y-direction side plate 120 is made of 6-series aluminum profiles through an extrusion process, and a first coolant flow channel 1211 is formed therein. Compared to 1-series aluminum blown water-cooling plates or stamped and brazed integrated water-cooling plates in related technologies, the Y-direction side plate 120 has significantly improved strength and rigidity.

[0058] Optionally, as shown in Figure 9, the vertical plate 122 is provided with a relief portion 1221. When placing the battery module 200 in the battery frame 100, a transport mechanism is typically used to grasp the battery module 200 and transfer it to the internal cavity of the battery frame 100. Providing the relief portion 1221 on the vertical plate 122 allows the transport end of the transport mechanism to avoid interference with the vertical plate 122, allowing for smooth transfer of the battery module 200 into the battery frame 100. In this embodiment, each vertical plate 122 has multiple relief portions 1221, which are spaced apart along the length (X direction) of the vertical plate 122. In some embodiments, the number and distribution of the relief portions 1221 on the vertical plate 122 can be adjusted based on the length of the battery module 200 and the number and distribution of the transport end of the transport mechanism. In this embodiment, the relief portions 1221 are relief grooves formed on the vertical plate 122, which are simple in structure and easy to manufacture.

[0059] Figure 10 shows a schematic structural diagram of the base plate 130 provided in this embodiment. Figure 11 shows an enlarged partial view of point C in Figure 10 . As shown in Figures 10-11 in conjunction with Figures 4 and 5 , the battery frame 100 further includes a base plate 130. The base plate 130 is disposed between the two Y-direction side plates 120, with each side edge of the base plate 130 connected to the corresponding transverse plate 121 and the X-direction side plate 110. In some embodiments, each side edge of the base plate 130 is connected to the corresponding transverse plate 121 or the X-direction side plate 110. On the one hand, when the transverse plates 121 of the Y-direction side plates 120 have a constant dimension in the Y direction, the provision of the base plate 130 can increase the dimension of the entire battery frame 100 in the Y direction, making it suitable for supporting large-sized battery modules 200. On the other hand, when the dimension of the battery frame 100 in the Y direction is constant, the provision of the base plate 130 can reduce the dimension of the transverse plates 121 of the Y-direction side plates 120 in the Y direction, thereby facilitating the processing of the Y-direction side plates 120.

[0060] Optionally, the bottom plate 130 is provided with a plurality of second cooling liquid channels 132 spaced apart along the Y direction. In other words, the bottom plate 130 is also integrated with a water cooling plate, and the second cooling liquid channels 132 cooperate with the first cooling liquid channels 1211 to cool and dissipate heat for the battery module 200.

[0061] In this embodiment, the number of bottom plates 130 is one, and the two side edges of the bottom plate 130 spaced apart along the Y direction are respectively connected to the two horizontal plates 121 on the corresponding sides. Of course, in other embodiments, the number of bottom plates 130 can also be set to multiple, and multiple bottom plates 130 are connected in sequence along the Y direction, and the two bottom plates 130 located at both ends are respectively connected to the horizontal plates 121 on the corresponding sides. By providing multiple bottom plates 130, when assembling the battery pack, the designer can select an appropriate number of bottom plates 130 and assemble them with the X-direction side plates 110 and the Y-direction side plates 120 according to the size of the battery module 200 along the Y direction, so that the size of the battery frame 100 is adapted to the size of the battery module 200, so that the battery frame 100 can be suitable for carrying battery modules 200 of different sizes, thereby realizing the modular design of the battery frame 100 and reducing processing and design costs.

[0062] To achieve a stable connection between the bottom plate 130 and the cross plate 121, as shown in Figures 5 and 11, in this embodiment, a connecting slot 1212 is provided on the cross plate 121, and a connecting protrusion 131 is provided on the bottom plate 130 to engage with the connecting slot 1212, thereby achieving a stable connection between the cross plate 121 and the bottom plate 130, and the connection method is simple and fast. In other embodiments, the connecting protrusion 131 can also be provided on the cross plate 121 and the connecting slot 1212 can be provided on the bottom plate 130, which can also achieve the above effect. When there are at least two bottom plates 130, the adjacent two bottom plates 130 are also connected by a snap-fit ​​method, and the connection method is the same as the connection method between the bottom plate 130 and the cross plate 121.

[0063] Continuing with Figures 1-4, the bottom of the battery module 200 is connected to the cross plate 121 via thermally conductive adhesive. The bottom of the battery module 200 is also connected to the base plate 130 via thermally conductive adhesive. This adhesive possesses a certain degree of shear strength, which, in conjunction with the cross plate 121 and base plate 130, controls the overall Z-direction deformation of the battery module 200. Furthermore, this adhesive exhibits excellent thermal conductivity, assisting the second coolant flow channels 132 and the first coolant flow channels 1211 in cooling and dissipating heat from the battery module 200.

[0064] Optionally, the battery pack provided in this embodiment further includes side reinforcement plates 310 , which are provided between the battery modules 200 at the ends and the X-direction side plates 110 , as well as between two adjacent battery modules 200 . The provision of the side reinforcement plates 310 can improve the overall modal properties of the battery modules 200 and prevent a decrease in the overall mechanical strength of the battery modules 200 due to aging of the thermally conductive structural adhesive between the bottom of the battery modules 200 and the cross plates 121 , and between the bottom of the battery modules 200 and the bottom plate 130 . Optionally, the side reinforcement plates 310 are bonded to the sides of the battery modules 200 .

[0065] In the first embodiment, the side reinforcing plate 310 can be an epoxy plate, which is adhered to the side of the battery module 200 using epoxy resin glue. In this example, the thickness of the side reinforcing plate 310 ranges from 0.2 mm to 1 mm. For example, the thickness of the side reinforcing plate 310 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc.

[0066] In a second embodiment, the side reinforcement plates 310 can be made of a glass fiber reinforced epoxy plate, which is adhered to the side of the battery module 200 using epoxy resin glue or polyurethane glue. In this example, the thickness of the side reinforcement plates 310 ranges from 0.2 mm to 0.5 mm. For example, the thickness of the side reinforcement plates 310 can be 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, etc.

[0067] In a third embodiment, the side reinforcement plate 310 can be an aluminum plate, which is adhered to the side of the battery module 200 using epoxy glue, polyurethane glue, or double-sided tape. In this example, the thickness of the side reinforcement plate 310 ranges from 1 mm to 2 mm. For example, the thickness of the side reinforcement plate 310 can be 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, etc.

[0068] Optionally, anti-collision buffers 400 are provided between the ends of the battery module 200 and the corresponding vertical plates 122. These buffers 400 mitigate the impact strength between the battery module 200 and the battery frame 100 under vibration conditions, improving the battery pack's crashworthiness and protecting the battery module 200 while also extending the service life of the battery frame 100. Optionally, the thickness of the anti-collision buffer 400 ranges from 0.8 mm to 1.2 mm. Exemplary thicknesses include 0.8 mm, 1.0 mm, 1.1 mm, and so on.

[0069] To improve the battery pack's crashworthiness, in this embodiment, end reinforcement plates 320 are provided at both ends of the battery module 200 along the Y direction. Optionally, the end reinforcement plates 320 are metal plates with a thickness ranging from 2.5 mm to 3.5 mm. For example, the thickness of the end reinforcement plates 320 can be 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, or 3.4 mm.

[0070] Optionally, an insulating member is provided between the end reinforcement plate 320 and the impact buffer 400 to provide an insulated connection between the battery frame 100 and the battery module 200, ensuring the safety of the entire battery pack. In this embodiment, the insulating member is made of polycarbonate (PC) and has a thickness ranging from 0.1 mm to 0.8 mm. For example, the thickness of the insulating member can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0071] The battery frame 100 provided in this embodiment significantly enhances its structural strength through the L-shaped structure of its Y-direction side panels 120, the selected materials, and the chosen connection process, enabling it to meet the stiffness and modal requirements of large-sized battery packs. Simulations and field validation have shown that this battery frame 100 is suitable for battery packs measuring 1.8m by 2.1m.

Claims

1. A battery frame, comprising: Two Y-direction side plates (120), each of the Y-direction side plates (120) includes a horizontal plate (121) and a vertical plate (122) erected on the horizontal plate (121). The horizontal plate (121) and the vertical plate (122) of each Y-direction side plate (120) are of an integral structure. The two Y-direction side plates (120) are arranged oppositely along the Y direction and are connected by the horizontal plate (121). A plurality of first coolant flow channels (1211) arranged at intervals along the Y direction are formed on the horizontal plate (121); Two X-direction side plates (110), the two X-direction side plates (110) are arranged oppositely along the X direction, and each end of each Y-direction side plate (120) along the X direction is respectively connected to the two X-direction side plates (110). The two Y-direction side plates (120) and the two X-direction side plates (110) enclose a frame structure with one end open; A cover plate (140) covering the opening of the frame structure; The X direction and the Y direction are perpendicular to each other.

2. The battery frame according to claim 1, further comprising at least one of the following: At both ends of each X-direction side plate (110) along the Y direction, a first extension plate (111) extends inward along the X direction. The first extension plate (111) is partially attached to and connected to the corresponding vertical plate (122); At the top of each X-direction side plate (110), a second extension plate (112) extends outward along the X direction. The second extension plate (112) is partially attached to and connected to the cover plate (140); At the bottom edge of each X-direction side plate (110), a third extension plate (113) extends inward along the X direction. The third extension plate (113) is partially attached to and connected to the corresponding horizontal plate (121).

3. The battery frame according to claim 1, further comprising at least one of the following: the thickness range of the X-direction side plate (110) is 2 mm to 3.5 mm; the thickness range of the Y-direction side plate (120) is 2 mm to 3.5 mm.

4. The battery frame according to claim 1, wherein, A relief portion (1221) is provided on the vertical plate (122).

5. The battery frame according to any one of claims 1 to 4, wherein, The battery frame further includes a bottom plate (130). The bottom plate (130) is disposed between the two Y-direction side plates (120), and each side edge of the bottom plate (130) is respectively connected to the corresponding horizontal plate (121) or the X-direction side plate (110).

6. The battery frame according to claim 5, wherein, A plurality of second coolant flow channels (132) arranged at intervals along the Y direction are formed on the bottom plate (130).

7. The battery frame according to claim 5, wherein, A connection card slot (1212) is provided on one of the bottom plate (130) and the horizontal plate (121), and a connection protrusion (131) that is engaged with the connection card slot (1212) is provided on the other.

8. The battery frame according to claim 5, wherein, The number of the bottom plates (130) is multiple. The multiple bottom plates (130) are sequentially connected along the Y direction, and the two bottom plates (130) at both ends are respectively connected to the corresponding horizontal plates (121).

9. A battery pack, comprising: The battery module (200) includes a plurality of battery packs (210) stacked in the Y direction. Each battery pack (210) includes at least two battery cells (211) spaced apart in the X direction, and the thickness direction of the battery cells (211) is parallel to the Y direction. For the battery frame according to any one of claims 1 to 8, the battery module (200) is disposed in the battery frame, and the major surface of the battery cell (211) faces the vertical plate (122) of the Y-direction side plate (120) of the battery frame.

10. The battery pack according to claim 9, wherein, In the Y direction, a heat insulation and buffer member is provided between two adjacent battery packs (210).

11. The battery pack according to claim 10 further includes at least one of the following: The thickness of the heat insulation and buffer member ranges from 3 mm to 5 mm. The width of the heat insulation and buffer member is equal to the sum of the widths of all the battery cells (211) in each battery pack (210).

12. The battery pack according to claim 9, wherein, The bottom of the battery module (200) is connected to the horizontal plate (121) by a thermally conductive structural adhesive.

13. The battery pack according to claim 9, wherein, Anti-collision buffer members (400) are provided between the two ends of the battery module (200) in the Y direction and the corresponding vertical plates (122).

14. The battery pack according to claim 13, wherein, The thickness of the anti-collision buffer member (400) ranges from 0.8 mm to 1.2 mm.

15. The battery pack according to claim 13, wherein, An end reinforcing plate (320) is provided between the anti-collision buffer member (400) and the vertical plate (122).

16. The battery pack according to claim 15, wherein, The thickness of the end reinforcing plate (320) ranges from 2.5 mm to 3.5 mm.

17. The battery pack according to claim 9, wherein, The battery pack further includes side reinforcing plates (310). The side reinforcing plates (310) are provided between the battery module (200) at the end and the X-direction side plate (110), and between two adjacent battery modules (200).

18. The battery pack according to claim 17, wherein, The thickness of the side reinforcing plate (310) ranges from 0.2 mm to 2 mm.

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