Battery frame and battery pack

Abstract

The utility model relates to the technical field of energy storage batteries, and discloses a battery frame and a battery pack. The battery frame comprises two X-direction side plates, two Y-direction side plates and a cover plate, each Y-direction side plate comprises a transverse plate and a vertical plate vertically arranged on the transverse plate, the transverse plates and the vertical plates are of an integrated structure, the two Y-direction side plates are oppositely arranged in the Y direction and are connected through the transverse plates, and the transverse plates are provided with a plurality of first cooling liquid flow channels arranged at intervals in the Y direction; the two X-direction side plates are oppositely arranged in the X direction, the two ends, in the X direction, of each Y-direction side plate are connected with the two X-direction side plates correspondingly, and the two Y-direction side plates and the two X-direction side plates define a frame structure with an opening in one end; the cover plate covers the opening of the frame structure. The battery frame is relatively high in structural strength, can be suitable for bearing a large-size battery module, and can improve the overall rigidity and modality of a battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a battery frame and a battery pack. Background Art

[0002] With the rapid development of the new energy vehicle market, as the core component of new energy vehicles, the performance and safety of power batteries have become important factors determining the vehicle performance and market competitiveness. As a key component for carrying and protecting power batteries, the frame structure strength of the battery pack is directly related to the safety performance of the battery and the service life of the whole vehicle.

[0003] The accommodation space inside the battery pack can accommodate multiple battery modules, and the battery modules have the following two forms: 1) The battery module adopts the form of a battery module group, that is, the battery module has an end plate and side plates, and the end plate or side plates are installed on the installation beams inside the battery pack, resulting in a relatively complex structure of the whole battery pack, and the height of the installation beam is usually less than 30 mm. Therefore, the installation beam contributes little to the overall stiffness 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 means of bottom gluing. When the battery pack is large in size, both battery packs with the above two structures are difficult to meet the stiffness and modal requirements.

[0004] Therefore, it is urgent to propose a battery pack to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a battery frame and a battery pack, which have relatively large structural strength, can be applicable to the bearing of large-size battery modules, can improve the overall stiffness and modal of the battery pack, and can reduce the processing cost.

[0006] As conceived above, the technical solution adopted by the utility model is as follows:

[0007] A battery frame includes:

[0008] Two Y-direction side plates, each of the Y-direction side plates includes a horizontal plate and a vertical plate erected on the horizontal plate. The horizontal plate and the vertical plate of each Y-direction side plate are of an integral structure. The two Y-direction side plates are arranged oppositely along the Y direction and are connected by the horizontal plate. A plurality of first coolant flow channels are arranged at intervals along the Y direction on the horizontal plate;

[0009] Two X-direction side plates, the two X-direction side plates are arranged oppositely along the X direction, and each end of each Y-direction side plate along the X direction is respectively connected to the two X-direction side plates. The two Y-direction side plates and the two X-direction side plates enclose a frame structure with one end open;

[0010] A cover plate, which is covered at the opening of the frame structure;

[0011] The X direction and the Y direction are perpendicular to each other.

[0012] As a preferred solution of the battery frame provided by the present utility model, at both ends of the X-direction side plate along the Y direction, first extension plates are arranged to extend inwards along the X direction, and the first extension plates are partially attached to and connected with the corresponding vertical plates; and / or

[0013] At the top of the X-direction side plate, a second extension plate is arranged to extend outwards along the X direction, and the second extension plate is partially attached to and connected with the cover plate; and / or

[0014] At the bottom edge of the X-direction side plate, a third extension plate is arranged to extend inwards along the X direction, and the third extension plate is partially attached to and connected with the corresponding horizontal plate.

[0015] As a preferred solution of the battery frame provided by the present utility model, the thickness of the X-direction side plate is 2 mm to 3.5 mm; and / or the thickness of the Y-direction side plate is 2 mm to 3.5 mm.

[0016] As a preferred solution of the battery frame provided by the present utility model, an avoidance portion is provided on the vertical plate.

[0017] As a preferred solution of the battery frame provided by the present utility model, the battery frame further includes a bottom plate, the bottom plate is arranged between the two Y-direction side plates, and each side edge of the bottom plate is respectively connected to the corresponding horizontal plate and the X-direction side plate.

[0018] As a preferred solution of the battery frame provided by the present utility model, a plurality of second coolant flow channels are arranged on the bottom plate at intervals along the Y direction.

[0019] As a preferred solution of the battery frame provided by the present utility model, a connection card slot is provided on one of the bottom plate and the horizontal plate, and a connection protrusion that is snap-fitted with the connection card slot is provided on the other.

[0020] As a preferred solution of the battery frame provided by the present utility model, the number of the bottom plates is multiple, the multiple bottom plates are sequentially connected along the Y direction, and the two bottom plates at both ends are respectively connected to the corresponding horizontal plates.

[0021] The present utility model also provides a battery pack, including:

[0022] A battery module, including a plurality of battery groups stacked along the Y direction, each battery group includes at least two battery cell monomers arranged at intervals along the X direction, and the thickness direction of the battery cell monomers is parallel to the Y direction;

[0023] The battery frame as described above, the battery module is disposed in the battery frame, and the major surface of the battery cell of the battery cell unit faces the Y-direction side plate of the battery frame.

[0024] As a preferred embodiment of the battery pack provided by the present invention, along the Y direction, a heat insulation and buffer member is disposed between adjacent two of the battery groups.

[0025] As a preferred embodiment of the battery pack provided by the present invention, the thickness of the heat insulation and buffer member is 3 mm to 5 mm; and / or

[0026] The width of the heat insulation and buffer member is equal to the sum of the widths of all the battery cell units in each of the battery groups.

[0027] As a preferred embodiment of the battery pack provided by the present invention, the bottom of the battery module is connected to the cross plate through a thermally conductive structural adhesive.

[0028] As a preferred embodiment of the battery pack provided by the present invention, anti-collision buffer members are disposed between the two ends of the battery module along the Y direction and the corresponding side vertical plates.

[0029] As a preferred embodiment of the battery pack provided by the present invention, the thickness of the anti-collision buffer member is 0.8 mm to 1.2 mm.

[0030] As a preferred embodiment of the battery pack provided by the present invention, an end reinforcing plate is disposed between the anti-collision buffer member and the vertical plate.

[0031] As a preferred embodiment of the battery pack provided by the present invention, the thickness of the end reinforcing plate is 2.5 mm to 3.5 mm.

[0032] As a preferred embodiment of the battery pack provided by the present invention, the battery pack further includes side reinforcing plates, and the side reinforcing plates are disposed between the battery modules at the ends and the vertical plates of the battery frame and between adjacent two of the battery modules.

[0033] As a preferred embodiment of the battery pack provided by the present invention, the thickness of the side reinforcing plate is 0.2 mm to 2 mm.

[0034] The beneficial effects of the present invention are:

[0035] The present utility model 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 during long-term use, the expansion force can act on the vertical plate of the Y-direction side plate, and the horizontal plate can apply a force towards the inside of the battery frame to the vertical plate, thereby enhancing the ability of the vertical plate to resist deformation, and further enabling it to meet the requirements of the battery pack for stiffness and modality to be applicable to the load-bearing of large-size battery modules; by providing a first coolant flow channel on the horizontal plate, the battery module can be cooled and dissipated heat. Compared with the traditional battery frame, this design, on the one hand, is equivalent to integrating a water-cooling plate on the Y-direction side plate, and the Y-direction side plate can not only realize the load-bearing function of the battery module but also play a role in cooling and dissipating heat from the battery module, and on the other hand, it can also reduce the types and quantities of components and lower the processing cost. The structure of this battery frame is simple, and it can reduce the material usage of structural parts, reduce the connection surfaces between the X-direction side plate, Y-direction side plate, and cover plate, and lower the processing cost.

[0036] The present utility model also provides a battery pack. By applying the above battery frame, the overall stiffness and modality of the battery pack can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of a battery pack with a hidden cover plate and some battery modules provided by an embodiment of the present utility model;

[0038] Figure 2 is an exploded structural diagram of a battery module provided by an embodiment of the present utility model;

[0039] Figure 3 is a schematic structural diagram of a battery frame provided by an embodiment of the present utility model;

[0040] Figure 4 is an exploded structural diagram of a battery frame provided by an embodiment of the present utility model;

[0041] Figure 5 is Figure 4 a partial enlarged view at A;

[0042] Figure 6 is a schematic structural diagram of an X-direction side plate provided by an embodiment of the present utility model from one perspective;

[0043] Figure 7 is a schematic structural diagram of an X-direction side plate provided by an embodiment of the present utility model from another perspective;

[0044] Figure 8 is Figure 3 a partial enlarged view at B;

[0045] Figure 9 is a schematic structural diagram of a Y-direction side plate provided by an embodiment of the present utility model;

[0046] Figure 10 is a schematic structural view of the bottom plate provided by an embodiment of the present utility model;

[0047] Figure 11 is Figure 10 a partial enlarged view at C.

[0048] In the figure:

[0049] 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, connection card slot; 122, vertical plate; 1221, avoidance portion; 130, bottom plate; 131, connection protrusion; 132, second coolant flow channel;

[0050] 200, battery module; 210, battery pack; 211, single battery cell;

[0051] 310, side strengthening plate; 320, end strengthening plate;

[0052] 400, anti-collision buffer member. Detailed implementation manners

[0053] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0054] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0055] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0056] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0057] Figure 1 The structural schematic diagram of the battery pack hidden cover plate and part of the battery module 200 provided in this embodiment is shown. As Figure 1 shown, this embodiment provides a battery pack, which includes a battery frame 100 and a battery module 200, and the battery module 200 is arranged in the battery frame 100. The battery frame 100 plays a role in carrying and protecting the battery module 200. Optionally, the number of the battery modules 200 is multiple, and the multiple battery modules 200 are arranged at intervals along the X direction and are arranged in the battery frame 100 to improve the battery capacity, voltage, load, safety and stability of the battery pack.

[0058] Figure 2 The exploded structural schematic diagram of the battery module 200 provided in this embodiment is shown. As Figure 2 and in combination with Figure 1As shown, in this embodiment, the battery module 200 includes a plurality of battery packs 210 stacked in the Y direction, and each battery pack 210 includes at least two cell monomers 211 spaced apart in the X direction. Compared with the traditional battery module in the form of a battery module, the battery module 200 in this embodiment can omit the setting of the end plate and the steel strip. When it is placed in the battery frame 100, on the one hand, the distance of the thickness of multiple side plates during its arrangement can be reduced, so that the width is smaller when the same number of battery modules are packaged, thereby improving the space utilization rate and the energy density of the whole package; on the other hand, the expansion force of the battery module 200 can directly act on the battery frame 100. Compared with the design method of concentrating the expansion force on the end plate and the steel strip in the traditional battery module, the acting area between the battery module 200 and the battery frame 100 is larger, and the strength of the end plate or the steel strip itself is much lower than the strength of the entire battery frame 100. Therefore, the stiffness of the battery frame 100 and the effect of resisting the expansion force are better.

[0059] It should be noted that the X direction specifically refers to the width direction of the cell monomer 211, the Y direction specifically refers to the thickness direction of the cell monomer 211, and the Z direction specifically refers to the height direction of the cell monomer 211. Among them, the X direction, the Y direction, and the Z direction are perpendicular to each other in pairs. It should be particularly noted that the outer surfaces of the cell monomers 211 in the two battery packs 210 located at the ends of each battery module 200 are the large surfaces of the cells. When the battery pack is working, the expansion force generated by the battery module 200 in the Y direction is the largest, that is, the direction perpendicular to the large surface of the cell.

[0060] Optionally, a heat insulation and buffer member is provided between adjacent two battery packs 210. The heat insulation and buffer member is used to reduce the phenomenon that the thermal runaway of the cell monomer 211 caused by too high temperature spreads to the entire battery module 200, and can also avoid the adverse impact on the performance of the battery pack due to the excessive expansion force of the battery module 200. Optionally, the thickness of the heat insulation and buffer member is 3 mm to 5 mm. Exemplarily, the thickness of the heat insulation and buffer member can be 3.2 mm, 3.4 mm, 3.5 mm, 3.8 mm, 4.0 mm, 4.2 mm, 4.5 mm, 4.6 mm, 4.8 mm, etc.

[0061] In this embodiment, the width of the heat insulation and buffer member is equal to the sum of the widths of all the cell monomers 211 in each battery pack 210. This design can make the heat insulation and buffer member completely cover the large surfaces of all the cell monomers 211 in each battery pack 210, having the best heat insulation and buffer effect. Optionally, both sides of the heat insulation and buffer member are adhesively connected to the corresponding battery pack 210 on each side, which is convenient to operate and has a firm connection.

[0062] Optionally, adjacent two battery cells 211 in each battery pack 210 are connected by double-sided tape or glue, which is simple and convenient and has a firm connection. In this embodiment, three battery modules 200 are provided in the battery frame 100, and each single battery pack 210 in each battery module 200 includes two battery cells 211. Of course, this embodiment does not limit 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, and designers can adjust the above numbers according to actual production needs. However, as the size of the battery module 200 increases, the existing battery frame 100 is difficult to meet the requirements of the battery pack for stiffness and modality.

[0063] Figure 3 FIG. 4 shows a schematic structural view of the battery frame 100 provided in this embodiment. Figure 4 FIG. 5 shows an exploded structural view of the battery frame 100 provided in this embodiment. Figure 5 FIG. shows Figure 4 a partial enlarged view at A. To solve the above problems, as Figures 3 - 5 and in combination with Figure 1 shown, this embodiment further provides a battery frame 100, which includes two X-direction side plates 110, two Y-direction side plates 120 and a cover plate (not shown in the figure). 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 of an integral structure. The two Y-direction side plates 120 are arranged opposite to each other 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; the two X-direction side plates 110 are arranged opposite to each other along the X direction, and two ends of each Y-direction side plate 120 along the X direction are 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; the cover plate is covered at the opening of the frame structure, and the large surface of the battery cell 211 faces the Y-direction side plate 120. In this embodiment, the X-direction side plates 110, the Y-direction side plates 120 and the cover plate enclose 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 faces the vertical plate 122 of the Y-direction side plate 120, that is, the Y-direction side plate 120 is the main part for bearing the expansion force of the battery module 200.

[0064] The battery frame 100 provided in this embodiment, by providing the Y-direction side plate 120 with an integrally formed horizontal plate 121 and vertical plate 122, when the battery module 200 expands during long-term use, the expansion force can act on the vertical plate 122 of the Y-direction side plate 120, and the horizontal plate 121 can apply a force towards the inside of the battery frame 100 to the vertical plate 122, thereby enhancing the ability of the vertical plate 122 to resist deformation, and further enabling it to meet the requirements of the battery pack for stiffness and modality to be applicable to the load-bearing of large-size 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 heat. Compared with the traditional battery frame, this design, on the one hand, is equivalent to integrating the water-cooling plate on the Y-direction side plate 120, and the Y-direction side plate 120 can not only realize the load-bearing function of the battery module 200 but also play a role in cooling and dissipating heat from the battery module 200, and on the other hand, it can also reduce the types and quantities of components and lower the processing cost. The structure of the battery frame 100 is simple, and the material used for the structural parts can be reduced. The connection surfaces between the X-direction side plate 110, the Y-direction side plate 120, and the cover plate are reduced, and the processing cost is reduced.

[0065] Figure 6 FIG. 4 shows a schematic structural diagram of the X-direction side plate 110 provided in this embodiment from one perspective. Figure 7 FIG. 5 shows a schematic structural diagram of the X-direction side plate 110 provided in this embodiment from another perspective. Figure 8 FIG. Figure 3 shows a partial enlarged view at B. As Figures 6 - 8 shown and combined with Figure 3 FIG. 6, at both ends of the X-direction side plate 110 along the Y direction, first extension plates 111 are provided and extend inwards in the X direction. The first extension plates 111 are partially attached to and connected to the corresponding vertical plates 122. By providing the first extension plates 111, the contact area between the X-direction side plate 110 and the vertical plates 122 can be increased, and the connection strength between the two can be improved, thereby improving the structural strength of the entire battery frame 100 to a certain extent. In this embodiment, the first extension plates 111 and the corresponding vertical plates 122 are connected by welding, that is, the X-direction side plate 110 and the Y-direction side plate 120 are connected by edge welding, with firm connection and relatively high structural strength. With this design, the Y-direction side plate 120 can also be structurally pre-fixed by the X-direction side plate 110, and 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 further improving the structural strength of the battery frame 100.

[0066] Optionally, a second extension plate 112 is provided on the top of the X-direction side plate 110 extending outward in the X direction, and the second extension plate 112 is partially attached to and connected with the cover plate. This design can increase the contact area between the X-direction side plate 110 and the cover plate, improve the connection strength between the two, and thus improve the structural strength of the entire battery frame 100 to a certain extent. In this embodiment, the cover plate and the second extension plate 112 as well as the cover plate and the Y-direction side plate 120 are pre-tightened and fixed by connecting bolts, and the cover plate cooperates with the X-direction side plate 110 to support and protect the Y-direction side plate 120, so that when the battery module 200 expands during operation, the cover plate is used 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 when the battery module 200 expands, and further improving the structural strength of the battery frame 100.

[0067] Optionally, a third extension plate 113 is provided on the bottom edge of the X-direction side plate 110 extending inwardly in the X direction, and the third extension plate 113 is partially attached to and connected to the horizontal plate 121 on the corresponding side. This design can increase the contact area between the X-direction side plate 110 and the horizontal plate 121, improve the connection strength between the two, and thus improve 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 horizontal plate 121 by welding. Of course, in other embodiments, the third extension plate 113 and the horizontal plate 121 can also be connected by bolts, which is not limited here.

[0068] It should be particularly noted that 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 away from the battery module 200, that is, the side of the X-direction side plate 110 away from the internal cavity of the battery frame 100.

[0069] In this embodiment, the Y-direction side plate 120 is made of aluminum profile. Preferably, 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.

[0070] In some embodiments, the X-direction side plate 110 is made of 6-series aluminum profiles to improve the structural strength of the X-direction side plate 110. In other embodiments, the X-direction side plate 110 can also be formed by bending a sheet metal part. Since most of the expansion force acts on the Y-direction side plate 120 when the battery module 200 expands, the X-direction side plate 110 formed by the sheet metal bending process can also meet the requirements of the battery frame 100 for stiffness and modality. When preparing the X-direction side plate 110, die-cast aluminum or sheet metal bending strengthening structures are provided at the corners of the main body, the first extension plate 111, the second extension plate 112, and the third extension plate 113 of the X-direction side plate 110 to reduce the use of structural parts such as sealing nails. Compared with the battery frames in the prior art, this battery frame 100 has fewer connection surfaces when connecting the X-direction side plate 110, the Y-direction side plate 120, and the cover plate, thereby saving processing costs to a certain extent.

[0071] Optionally, the thickness of the X-direction side plate 110 is 2 mm to 3.5 mm; the thickness of the Y-direction side plate 120 is 2 mm to 3.5 mm. Exemplarily, 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 thicknesses of both the X-direction side plate 110 and the Y-direction side plate 120 are preferably selected to be 2.5 mm. Considering that the Y-direction side plate 120 is subjected to a relatively large expansion force of the battery module 200, the thickness of the Y-direction side plate 120 can also be set to be greater than the thickness of the X-direction side plate 110. The specific values of the thicknesses of the two are not limited in this embodiment, and designers can adjust the thicknesses of the two according to actual needs to ensure the structural strength of the entire battery frame 100.

[0072] Figure 9 shows a schematic structural diagram of the Y-direction side plate 120 provided in this embodiment. As Figure 9 and in combination with Figure 5 shown, 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 thereon. Compared with the 1-series aluminum blown water-cooled plate or the stamping and brazing integrated water-cooled plate in the prior art, the self-strength and stiffness of the Y-direction side plate 120 are greatly improved.

[0073] Optionally, as Figure 9As shown, an avoidance portion 1221 is provided on the vertical plate 122. When placing the battery module 200 into the battery frame 100, a handling mechanism is usually used to grasp the battery module 200 and transfer it into the internal cavity of the battery frame 100. By providing the avoidance portion 1221 on the vertical plate 122, the handling end of the handling mechanism can be avoided, so that it can smoothly transfer the battery module 200 into the battery frame 100 and prevent interference between the handling end of the handling mechanism and the vertical plate 122. In this embodiment, the number of avoidance portions 1221 on each vertical plate 122 is multiple, and the multiple avoidance portions 1221 are spaced along the length direction (X direction) of the vertical plate 122. The number of avoidance portions 1221 on the vertical plate 122 in this embodiment is not limited, and designers can adjust the number and distribution of the avoidance portions 1221 on the vertical plate 122 according to the length of the battery module 200 and the number and distribution of the handling ends of the handling mechanism. In this embodiment, the avoidance portion 1221 is an avoidance groove opened on the vertical plate 122, which has a simple structure and is convenient for processing.

[0074] Figure 10 Fig. shows a schematic structural view of the bottom plate 130 provided in this embodiment. Figure 11 shows Figure 10 a partial enlarged view at C. As Figures 10 - 11 and in combination with Figure 4 and Figure 5 shown, the battery frame 100 further includes a bottom plate 130. The bottom plate 130 is disposed between two Y-direction side plates 120, and each side of the bottom plate 130 is respectively connected to the corresponding cross plate 121 and the X-direction side plate 110. By providing the bottom plate 130, on the one hand, when the size of the cross plate 121 of the Y-direction side plate 120 in the Y direction is fixed, the setting of the bottom plate 130 can increase the size of the entire battery frame 100 in the Y direction to be suitable for carrying large-size battery modules 200; on the other hand, when the size of the battery frame 100 in the Y direction is fixed, the setting of the bottom plate 130 can reduce the size of the cross plate 121 of the Y-direction side plate 120 in the Y direction, thereby facilitating the processing of the Y-direction side plate 120.

[0075] Optionally, a plurality of second coolant flow channels 132 spaced along the Y direction are opened on the bottom plate 130. That is to say, a water-cooling plate is also integrated on the bottom plate 130, and the second coolant flow channels 132 cooperate with the first coolant flow channels 1211 to jointly realize the cooling and heat dissipation of the battery module 200.

[0076] In this embodiment, the number of the bottom plates 130 is one, and two side edges of the bottom plate 130 spaced along the Y direction are respectively connected to two cross plates 121 on the corresponding side. Of course, in other embodiments, the number of the bottom plates 130 can also be set to 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 cross plates 121 on the corresponding side. By setting multiple bottom plates 130, when assembling the battery pack, designers can select an appropriate number of bottom plates 130 to assemble with the X-direction side plates 110 and 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, thereby enabling the battery frame 100 to be suitable for carrying battery modules 200 of different sizes, and thus realizing the modular design of the battery frame 100 and reducing the processing and design costs.

[0077] To achieve a stable connection between the bottom plate 130 and the cross plate 121, as Figure 5 and Figure 11 shown, in this embodiment, a connection slot 1212 is provided on the cross plate 121, and a connection protrusion 131 that is snap-fitted with the connection slot 1212 is provided on the bottom plate 130 to achieve 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 connection protrusion 131 can also be provided on the cross plate 121, and the connection slot 1212 can be provided on the bottom plate 130, which can also achieve the above effects. It should be noted that when the number of the bottom plates 130 is at least two, the adjacent two bottom plates 130 are also connected by a snap-fitting method, and the connection method is the same as that between the bottom plate 130 and the cross plate 121, and this embodiment will not elaborate on this.

[0078] Continuing as Figures 1 - 4 shown, the bottom of the battery module 200 is connected to the cross plate 121 through a thermally conductive structural adhesive; the bottom of the battery module 200 is connected to the bottom plate 130 through a thermally conductive structural adhesive. The thermally conductive structural adhesive has a certain shear strength, which can cooperate with the cross plate 121 and the bottom plate 130 to control the deformation of the battery module 200 as a whole in the Z direction; in addition, the thermally conductive structural adhesive has good thermal conductivity, and it can also assist the second coolant flow channel 132 and the first coolant flow channel 1211 to jointly achieve the cooling and heat dissipation of the battery module 200.

[0079] Optionally, the battery pack provided in this embodiment further includes side strengthening plates 310. Side strengthening plates 310 are provided between the battery modules 200 at the ends and the vertical plates 122 of the battery frame 100, and also between adjacent two battery modules 200. The provision of the side strengthening plates 310 can further improve the overall mode of the battery modules 200, and can avoid the phenomenon that the overall mechanical strength of the battery modules 200 decreases due to the aging of the thermal conductive structural adhesive between the bottom of the battery modules 200 and the cross plate 121 and between the bottom of the battery modules 200 and the bottom plate 130. Optionally, the side strengthening plates 310 are adhered to the sides of the battery modules 200.

[0080] In the first embodiment, the side strengthening plates 310 can be made of epoxy boards, which are adhered to the sides of the battery modules 200 through epoxy resin glue. In this example, the thickness of the side strengthening plates 310 is 0.2 mm to 1 mm. Exemplarily, the thickness of the side strengthening plates 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.

[0081] In the second embodiment, the side strengthening plates 310 can be made of glass fiber reinforced epoxy boards, which are adhered to the sides of the battery modules 200 through epoxy resin glue or polyurethane glue. In this example, the thickness of the side strengthening plates 310 is 0.2 mm to 0.5 mm. Exemplarily, the thickness of the side strengthening plates 310 can be 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, etc.

[0082] In the third embodiment, the side strengthening plates 310 can be made of aluminum plates, which are adhered to the sides of the battery modules 200 through epoxy resin glue, polyurethane glue or double-sided tape. In this example, the thickness of the side strengthening plates 310 is 1 mm to 2 mm. Exemplarily, the thickness of the side strengthening plates 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.

[0083] Optionally, anti-collision buffer members 400 are provided between the two ends of the battery modules 200 and the corresponding side vertical plates 122. The anti-collision buffer members 400 are used to reduce the impact intensity between the battery modules 200 and the battery frame 100 under vibration conditions, improve the anti-collision performance of the battery pack, protect the battery modules 200 and also extend the service life of the battery frame 100. Optionally, the thickness of the anti-collision buffer members 400 is 0.8 mm to 1.2 mm. Exemplarily, the thickness of the anti-collision buffer members 400 is 0.8 mm, 1.0 mm, 1.1 mm, etc.

[0084] To further improve the anti-collision ability of the battery pack, in this embodiment, end reinforcing plates 320 are provided at both ends of the battery module 200 along the Y direction. Optionally, the end reinforcing plate 320 is a metal plate with a thickness of 2.5 mm to 3.5 mm. Exemplarily, the thickness of the end reinforcing plate 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, 3.4 mm, etc.

[0085] Optionally, an insulating member is further provided between the end reinforcing plate 320 and the anti-collision buffer member 400 to achieve insulated connection between the battery frame 100 and the battery module 200 and ensure the use safety of the entire battery pack. In this embodiment, the insulating member is made of PC material and has a thickness of 0.1 mm to 0.8 mm. Exemplarily, 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.

[0086] The battery frame 100 provided in this embodiment greatly improves the structural strength of the battery frame 100 itself through the L-shaped structure setting, material selection, and connection process selection of the Y-direction side plates 120, enabling it to meet the requirements of large-size battery packs for stiffness and modality. Through simulation and practical verification, the battery frame 100 is applicable to a battery pack with a size of 1.8 m * 2.1 m.

[0087] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery frame, characterized in that: include: Two Y-direction side plates (120), each of the Y-direction side plates (120) comprising a transverse plate (121) and a vertical plate (122) vertically arranged on the transverse plate (121), the transverse plate (121) and the vertical plate (122) of each Y-direction side plate (120) being an integrated structure, the two Y-direction side plates (120) being arranged opposite to each other along the Y direction and connected by the transverse plate (121), and the transverse plate (121) being provided with a plurality of first coolant flow channels (1211) spaced apart along the Y direction; Two X-direction side plates (110), 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 respectively connected to the two X-direction side plates (110) at two 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; A cover plate, arranged to cover 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, characterized in that: Both ends of the X-direction side plate (110) along the Y direction are provided with first extension plates (111) extending inwardly toward the X direction, and the first extension plates (111) are partially attached to and connected with the vertical plates (122) on the corresponding side; and / or A second extension plate (112) is provided on the top of the X-direction side plate (110) extending outward in the X-direction, and the second extension plate (112) is partially attached to and connected with the cover plate; and / or A third extension plate (113) is provided on the bottom edge of the X-direction side plate (110) extending inwardly toward the X direction, and the third extension plate (113) is partially attached to and connected with the horizontal plate (121) on the corresponding side.

3. The battery frame according to claim 1, characterized in that: The thickness of the X-direction side plate (110) is 2 mm to 3.5 mm; and / or the thickness of the Y-direction side plate (120) is 2 mm to 3.5 mm.

4. The battery frame according to claim 1, characterized in that: The vertical plate (122) is provided with an avoidance portion (1221).

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

6. The battery frame according to claim 5, characterized in that: The bottom plate (130) is provided with a plurality of second cooling liquid flow channels (132) arranged at intervals along the Y direction.

7. The battery frame according to claim 5, characterized in that: One of the bottom plate (130) and the cross plate (121) is provided with a connection slot (1212), and the other is provided with a connection protrusion (131) that is snap-fitted with the connection slot (1212).

8. The battery frame according to claim 5, characterized in that: There are a plurality of bottom plates (130), and the plurality of bottom plates (130) are connected in sequence along the Y direction, and the two bottom plates (130) located at the two ends are respectively connected to the transverse plate (121) on the corresponding side.

9. A battery pack, characterized in that: include: A battery module (200) comprises a plurality of battery packs (210) stacked along a Y direction, each of the battery packs (210) comprising at least two battery cells (211) arranged at intervals along an X direction, and a thickness direction of the battery cell (211) being parallel to the Y direction; The battery frame according to any one of claims 1 to 8, wherein the battery module (200) is arranged in the battery frame, and the large surface of the battery cell (211) is opposite to the Y-direction side plate (120) of the battery frame.

10. The battery pack according to claim 9, characterized in that: Along the Y direction, a heat insulating buffer is provided between two adjacent battery packs (210).

11. The battery pack according to claim 10, characterized in that: The thickness of the heat-insulating buffer is 3 mm to 5 mm; and / or The width of the heat-insulating buffer is equal to the sum of the widths of all the battery cells (211) in each of the battery packs (210).

12. The battery pack according to claim 9, characterized in that: The bottom of the battery module (200) is connected to the horizontal plate (121) via a heat-conductive structural adhesive.

13. The battery pack according to claim 9, characterized in that: Anti-collision buffer components (400) are provided between the two ends of the battery module (200) along the Y direction and the vertical plates (122) on the corresponding sides.

14. The battery pack according to claim 13, characterized in that: The anti-collision buffer (400) has a thickness of 0.8 mm to 1.2 mm.

15. The battery pack according to claim 13, characterized in that: An end reinforcement plate (320) is provided between the anti-collision buffer (400) and the vertical plate (122).

16. The battery pack according to claim 15, characterized in that: The thickness of the end reinforcement plate (320) is 2.5 mm to 3.5 mm.

17. The battery pack according to claim 9, characterized in that: The battery pack further comprises a side reinforcing plate (310), and the side reinforcing plate (310) is arranged between the battery module (200) at the end and the vertical plate (122) of the battery frame and between two adjacent battery modules (200).

18. The battery pack according to claim 17, characterized in that: The thickness of the side reinforcement plate (310) is 0.2 mm to 2 mm.

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