Battery pack

Abstract

The embodiment of the utility model provides a battery pack, and relates to the technical field of battery pack manufacturing, the battery pack comprises a shell and a plurality of battery cell modules; wherein each battery cell module comprises a battery cell and a battery cell bracket, the length of the battery cell is arranged along a first direction, and the plurality of battery cell modules are arranged at intervals along the first direction; a first fixing part and a hollow part are arranged on at least one side of the battery cell module in the second direction, the first fixing part extends towards the shell in the second direction, the hollow part and the first fixing part are oppositely arranged in the third direction, the shell is provided with a second fixing part, and the first fixing part is connected to the second fixing part. In the embodiment of the invention, the first fixing parts of the battery cell modules are arranged to extend towards the shell along the second direction, so that the distance between the adjacent battery cell modules is reduced, and the adjacent battery cell modules can be compactly arranged; besides, the hollow part can provide avoidance for the second fixing part of the shell, so that the size of the battery pack along the second direction is reduced, and the structure of the battery pack can be more compact.

Description

Technical Field

[0001] The present application belongs to the technical field of battery pack manufacturing, and specifically relates to a battery pack. Background Art

[0002] In order to meet the different power requirements of electrical equipment, some battery packs will be equipped with multiple groups of battery cell modules to provide different battery capacities.

[0003] In the related art, the battery cell module includes a battery cell bracket, and a bracket fixing portion for fixing the battery cell bracket to the battery pack shell is also provided on the battery cell bracket. Multiple groups of battery cell modules are arranged at intervals along a certain direction, and accordingly, the bracket fixing portion usually extends along this direction. This extension direction of the bracket fixing portion allows a large gap between adjacent battery cell modules, which to a certain extent occupies the internal space of the battery pack in this direction, making the size of the battery pack larger, which is not conducive to improving product competitiveness. Summary of the invention

[0004] The present application aims to provide a battery pack to solve the problem of large size of existing battery packs.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The present application discloses a battery pack having a first direction, a second direction and a third direction intersecting each other, comprising a shell and a plurality of battery cell modules; wherein:

[0007] The shell has a receiving cavity, the battery cell module includes a battery cell and a battery cell bracket, the length of the battery cell is arranged along the first direction, and a plurality of the battery cell modules are arranged in the receiving cavity at intervals along the first direction;

[0008] The battery cell module is provided with a first fixing portion and a hollow portion on at least one side along the second direction, the first fixing portion extends toward the shell along the second direction, the hollow portion and the first fixing portion are arranged opposite to each other along the third direction, the shell is provided with a second fixing portion at a position opposite to the hollow portion, and the first fixing portion is connected to the second fixing portion to fix the battery cell module to the shell.

[0009] Optionally, the battery cell holder is provided with a battery cell mounting groove, and the battery cell is arranged in the battery cell mounting groove; the first fixing portion is connected to the battery cell holder and extends toward the shell along the second direction.

[0010] Optionally, first fixing parts are provided on both sides of the battery cell support along the second direction.

[0011] Optionally, a plurality of the first fixing portions are provided on at least one side of the battery cell support along the second direction, and the plurality of the first fixing portions are arranged at intervals along the first direction.

[0012] Optionally, the first fixing portion and the battery cell support are separate structures.

[0013] Optionally, the first fixing portion and the battery cell support are an integrally formed structure.

[0014] Optionally, the battery cell bracket includes a first bracket and a second bracket, the first bracket and the second bracket are arranged opposite to each other along the first direction and are detachably connected; wherein the first fixing portion is arranged on the first bracket and / or the second bracket.

[0015] Optionally, the battery pack further includes a fastener, the first fixing portion is provided with a mounting hole, the mounting hole extends along the third direction, and the fastener is passed through the mounting hole and connected to the second fixing portion.

[0016] Optionally, the accommodating cavity is provided with an opening on at least one side along the third direction, the first fixing portion is provided close to the opening, and the hollowed-out portion is provided away from the opening.

[0017] Optionally, the second fixing portion and the shell are an integrally formed structure.

[0018] Optionally, partition ribs are provided in the shell, and the partition ribs are provided between adjacent battery cell modules to divide the accommodating cavity into a plurality of sub-accommodating cavities, and each sub-accommodating cavity is used to arrange a group of battery cell modules.

[0019] In the embodiment of the present application, the first fixing part of the battery cell module is fixedly connected to the second fixing part of the shell, so that the battery cell module can be fixed on the shell, which enhances the stability of the battery cell module in the battery pack accommodating cavity. The battery cell length of the battery cell module in the battery pack is arranged along the first direction, and the multiple battery cell modules in the accommodating cavity are arranged at intervals along the first direction. At this time, the first fixing part of the battery cell module is arranged to extend toward the shell along the second direction. Compared with the case where the first fixing part extends along the first direction, the spacing between adjacent battery cell modules is reduced, so that adjacent battery cell modules can be arranged compactly; in addition, since the battery cell module is provided with a hollowed-out part opposite to the first fixing part along the third direction, it can provide an avoidance effect for the second fixing part of the shell, reduce the size of the battery pack along the second direction, make the structure of the battery pack more compact, and enhance the competitiveness of the product.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of the structure of the battery pack described in the embodiment of the present application;

[0023] Figure 2 is an exploded schematic diagram of the battery pack described in the embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of the first bracket in the battery cell bracket described in the embodiment of the present application;

[0025] Figure 4 It is a schematic diagram of the spacing arrangement of multiple battery cell modules according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the battery pack housing structure according to an embodiment of the present application;

[0027] Figure 6 is a front view of the battery pack housing according to an embodiment of the present application;

[0028] Figure 7 is a cross-sectional view of the battery pack described in the embodiment of the present application;

[0029] Figure 8 is a cross-sectional view of the battery pack in another direction according to the embodiment of the present application;

[0030] Fig. 9 yes Figure 8 Enlarged schematic diagram of part A in the middle.

[0031] Figure numerals: 10 - shell; 11 - accommodating cavity; 12 - second fixing part; 13 - partition rib; 14 - base; 141 - mortise and tenon structure; 15 - upper cover; 16 - handle; 20 - battery cell module; 21 - first fixing part; 211 - mounting hole; 22 - battery cell bracket; 221 - battery cell mounting groove; 222 - hollowing part; 223 - first bracket; 224 - second bracket; 23 - battery cell; 30 - high-power component; 31 - thermal conductive foam; 32 - heat sink; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0033] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The embodiment of the present application provides a battery pack, which can be used for various electrical devices, such as mobile power supplies, smart phones, tablet computers, electric motorcycles, electric vehicles, energy storage systems, etc., wherein the battery cell bracket provided in the embodiment of the present application is used to install cylindrical battery cells, and soft-pack battery cells and square battery cells can be designed accordingly. The embodiment of the present application may not limit the specific type of battery cells in the battery pack.

[0037] Reference Figure 1, showing a schematic diagram of the structure of the battery pack according to an embodiment of the present application, referring to Figure 2 , showing an exploded schematic diagram of the battery pack according to an embodiment of the present application, referring to Figure 3 , showing a schematic diagram of the structure of the battery support according to the embodiment of the present application, referring to Figure 4 , showing a schematic diagram of the spacing arrangement of multiple battery cell modules according to an embodiment of the present application, referring to Figure 5 , showing a schematic diagram of the battery pack housing structure of the embodiment of the present application, referring to Figure 6 , showing a front view of the battery pack shell described in an embodiment of the present application.

[0038] It should be noted that, in the embodiment of the present application, the battery pack has a first direction X, a second direction Y and a third direction Z that intersect each other. Figures 1 to 6 The first direction is the direction indicated by the arrow X in the figure, the second direction is the direction indicated by the arrow Y in the figure, and the third direction is the direction indicated by the arrow Z in the figure.

[0039] like Figure 1 , Figure 2 As shown, the battery pack provided in the embodiment of the present application may specifically include a shell 10 and a plurality of battery cell modules 20, wherein the shell 10 has a accommodating cavity 11, the battery cell module 20 includes a battery cell 23 and a battery cell bracket 22, the length of the battery cell 23 is arranged along the first direction X, and the plurality of battery cell modules 20 are arranged in the accommodating cavity 11 at intervals along the first direction X; the battery cell module 20 is provided with a first fixing portion 21 and a hollow portion 222 on at least one side along the second direction Y, the first fixing portion 21 extends toward the shell 10 along the second direction Y, the hollow portion 222 is arranged opposite to the first fixing portion 21 along the third direction Z, and the shell 10 is provided with a second fixing portion 12 at a position opposite to the hollow portion 222, and the first fixing portion 21 is connected to the second fixing portion 12 for fixing the battery cell module 20 to the shell 10.

[0040] Specifically, the plurality of battery modules 20 in the battery pack accommodating cavity 11 are arranged at intervals along the first direction X, and the first fixing portion 21 is arranged on one side or both sides of the battery module 20 along the second direction Y, and extends toward the housing 10 along the second direction Y. It should be noted that the battery cell 23 in the embodiment of the present application may be a cylindrical battery cell, and the length direction of the cylindrical battery cell is arranged along the first direction X. Therefore, after the plurality of battery modules 20 are arranged at intervals along the first direction X, the length of the battery pack along the first direction X is too long. If the first fixing portion 21 extends along the first direction X, the length of the battery pack along the first direction X is further increased, which is not conducive to reducing the size of the battery pack.

[0041] Therefore, compared with the case where the first fixing portion 21 extends along the first direction X, the first fixing portion 21 is set to extend along the second direction Y, which reduces the distance between adjacent battery cell modules 20, so that adjacent battery cell modules 20 can be arranged compactly, saving the internal space of the battery pack, which is beneficial to reducing the size of the battery pack along the first direction X.

[0042] Furthermore, the cell module 20 is also provided with a hollow portion 222 at a position opposite to the first fixing portion 21 along the third direction Z. In practical applications, the hollow portion 222 may be formed by hollowing out a part of the structure of the cell support 22. In order to achieve assembly and fixation between the cell module 20 and the shell 10, a second fixing portion 12 is provided on the shell, and the second fixing portion 12 is opposite to the hollow portion 222 of the cell module 20 along the second direction Y. Since the first fixing portion 21 extends along the second direction Y in a direction away from the cell module 20, it will occupy a certain internal space in the accommodating cavity 11 of the battery pack shell 10. When the shell 10 is provided with a second fixing portion 12, in order to fasten the fastener on the second fixing portion 12, the extension length of the first fixing portion 21 may be set to be longer. When the battery cell holder 22 is provided with a hollow portion 222, the hollow portion 222 can serve as a avoidance for the second fixing portion 12. Therefore, when the hollow portion 222 of the battery cell 23 is engaged with the second fixing portion 12 of the shell 10, the length of the first fixing portion 21 can be set to be smaller to meet the connection with the second fixing portion 12, which is beneficial to reducing the size of the battery pack along the second direction Y, making full use of the internal space of the shell 10, so that the structure of the battery pack can be more compact, thereby improving product competitiveness.

[0043] In actual applications, the accommodating cavity 11 of the shell 10 has an opening, and the multiple battery cell modules 20 are first preliminarily assembled with the shell 10 through interference fitting from the opening. After the battery cell module 20 is preliminarily installed in the accommodating cavity 11 of the shell 10, the battery cell module 20 is fixed to the second fixing part 12 of the shell 10 through the first fixing part 21 on the battery cell module 20, thereby ensuring the reliable installation of the battery cell module 20 and preventing the battery cell 23 from being damaged by shaking and jittering during use.

[0044] In addition, refer to Figure 2 , showing an exploded schematic diagram of the battery pack according to an embodiment of the present application, referring to Figure 7 , shows a cross-sectional view of the battery pack described in an embodiment of the present application, such as Figure 1 and Figure 7 As shown, a base 14 is provided at the bottom of the shell 10, and a matching mortise and tenon structure 141 is also provided on the base 14 and the battery cell bracket 22. The base 14 and the battery cell bracket 22 strengthen the connection between the battery cell module 20 and the shell 10 through the mortise and tenon structure 141, thereby improving the stability of the product's mechanical performance.

[0045] Furthermore, if Figure 1 and Figure 2 As shown, the housing 10 is also provided with an upper cover 15, which is used to block the opening of the battery pack housing 10; the housing 10 is also provided with a handle 16 on the outside, through which the user can carry and transport the battery pack. The handle 16 on the outside of the housing 10 in the embodiment of the present application is arranged across the surface, that is, the two ends of the handle 16 are fixed to different outer surfaces of the housing 10, so that the deformation of the handle 16 can be increased when the handle 16 is pulled, so as to avoid the handle 16 from breaking and prolong the service life of the handle 16.

[0046] In the embodiment of the present application, the battery cell module 20 includes a battery cell holder 22 and a battery cell 23 . The battery cell holder 22 is provided with a battery cell mounting groove 221 , and the battery cell 23 is arranged in the battery cell mounting groove 221 . The first fixing portion 21 is connected to the battery cell holder 22 and extends toward the shell 10 along the second direction Y.

[0047] Specifically, the cell holder 22 may be provided with a plurality of cell mounting grooves 221, and the plurality of cell mounting grooves 221 may be arranged in an array, and one cell mounting groove 221 is used to mount one cylindrical cell 23. The cell mounting groove 221 is similar to a cylindrical shape, and the inner diameter of the cell mounting groove 221 is slightly smaller than the outer diameter of the cylindrical cell 23. The cell 23 may be installed in the cell mounting groove 221 by interference fitting, thereby ensuring that the cell 23 has good stability after being installed in the cell holder 22, and the cell 23 will not fall out of the cell mounting groove 221 when the entire battery pack is in a vibrating condition, thereby effectively ensuring the safety and reliability of the battery pack.

[0048] It should be noted that, in actual applications, the size of the cell holder 22 can match the size of the battery pack shell 10, and the number and size of the cell mounting slots 221 are set based on the battery capacity of a single cell 23 and the capacity requirements of the entire battery pack.

[0049] In an optional embodiment of the present application, first fixing portions 21 are provided on both sides of the cell support 22 along the second direction Y.

[0050] It should be noted that the first fixing portion 21 can be arranged on one side or both sides of the battery cell holder 22 along the second direction Y. When the first fixing portion 21 is provided on both sides of the battery cell holder 22 along the second direction Y, the battery cell module 20 is fixedly connected to the shell 10 on both sides along the second direction Y, which enhances the connection effect between the battery cell module 20 and the shell 10 and is beneficial to ensuring the stability of the battery cell module 20.

[0051] In an optional embodiment of the present application, a plurality of first fixing portions 21 are disposed on one side of the cell holder 22 along the second direction Y, and the plurality of first fixing portions 21 are disposed at intervals along the first direction X on one side of the cell holder 22 .

[0052] In actual applications, although the battery holder 22 is only provided with a plurality of first fixing parts 21 on one side, due to the large number of first fixing parts 21, there are also more fixing points between the battery holder 22 and the shell 10, which can also enhance the connection effect between the battery module 20 and the shell 10 to a certain extent.

[0053] In another optional embodiment of the present application, a plurality of first fixing portions 21 are disposed on both sides of the cell holder 22 along the second direction Y, and the plurality of first fixing portions 21 are disposed at intervals on both sides of the cell holder 22 along the first direction X.

[0054] For example, each cell holder 22 is provided with four first fixing portions 21 , wherein two first fixing portions 21 are provided on one side of the cell holder 22 along the second direction Y, and the other two first fixing portions 21 are provided on the other side of the cell holder 22 .

[0055] It can be understood that since the battery cell module 20 is connected to the shell 10 through the first fixing part 21, a plurality of first fixing parts 21 are evenly arranged around the battery cell holder 22, which can further enhance the connection strength between the battery cell module 20 and the shell 10, ensure the stability of the battery cell module 20 in the shell 10, and reduce the risk of damage to the battery cell 23 due to shaking.

[0056] In some optional embodiments of the present application, the first fixing portion 21 and the battery cell support 22 are separate structures.

[0057] Specifically, the first fixing portion 21 can be a separate component, and can be later installed on the battery holder 22 according to different internal space conditions of the battery pack. In practical applications, since the first fixing portion 21 extends in the second direction Y in the direction away from the battery module 20, it will occupy a certain internal space in the accommodating cavity 11 of the battery pack shell 10. Therefore, when there is sufficient space in the accommodating cavity 11 of the shell 10, the first fixing portion 21 can be connected to the battery holder 22 and the first fixing portion 21 can be used to connect with the shell 10 to further ensure the stability of the assembly of the battery module 20; accordingly, when the accommodating cavity 11 of the battery pack shell 10 is small, the battery holder 22 can be provided with the first fixing portion 21, thereby saving the internal space of the battery pack. In addition, since the first fixing portion 21 can be later installed on the battery holder 22, the position of the first fixing portion 21 is actually variable and can be adjusted according to the internal structure of the battery pack shell 10, so as to adapt to different battery pack shell 10 structures.

[0058] For example, the first fixing portion 21 may be clamped to the cell holder 22 , or may be bonded to the cell holder 22 .

[0059] In some other optional embodiments of the present application, the first fixing portion 21 and the battery cell support 22 are an integrally formed structure.

[0060] For example, the material of the battery holder 22 can be ABS material, PP material, or transparent PC material; in terms of processing method, the battery holder 22 can be formed by injection molding by integrally molding the battery holder 22 and the first fixing portion 21 .

[0061] It can be understood that compared with the separate structure of the first fixing part 21 and the battery cell holder 22, the battery cell holder 22 with this one-piece molding structure has higher production efficiency, and because there is no interface between the first fixing part 21 and the battery cell holder 22, it can have higher structural strength. In addition, during the injection molding process, the first fixing part 21 and the battery cell holder 22 are injection molded as one. When there are multiple first fixing parts 21, the connection strength between the multiple first fixing parts 21 and the battery cell holder 22 is more uniform, and it is not easy to break due to uneven force in the later stage.

[0062] like Figure 3 and Figure 4 As shown, in an optional embodiment of the present application, the battery cell bracket 22 includes a first bracket 223 and a second bracket 224, and the first bracket 223 and the second bracket 224 are arranged relative to each other along a first direction X and are detachably connected; wherein the first fixing portion 21 is arranged on the first bracket 223 and / or the second bracket 224.

[0063] For example, a first fixing portion 21 is provided on both sides of the first bracket 223 along the second direction Y. Similarly, a first fixing portion 21 is provided on both sides of the second bracket 224 along the second direction Y. In this way, on the plane formed by the first direction X and the second direction Y, the four corners of the battery cell bracket 22 each have a first fixing portion 21 for connecting with the shell 10, so that the connection force between the battery cell module 20 and the shell 10 is more uniform. The provision of multiple first fixing portions 21 strengthens the connection strength between the two and ensures the connection stability of the battery cell module 20.

[0064] In a specific application, the first bracket 223 and the second bracket 224 are provided with a positioning portion, wherein the first bracket 223 can be provided with a positioning protrusion, and the second bracket 224 is provided with a positioning groove adapted to the positioning protrusion, and the first bracket 223 and the second bracket 224 are positioned and connected by the cooperation of the positioning protrusion and the positioning groove. The first bracket 223 and the second bracket 224 are both provided with a battery cell installation groove 221. During assembly, the battery cell 23 can be first interference-fitted into the battery cell installation groove 221 of the first bracket 223 or the second bracket 224, and then the other second bracket 224 or the first bracket 223 is buckled with it, thereby forming a complete battery cell module 20.

[0065] In the embodiment of the present application, the battery pack also includes a fastener, the first fixing portion 21 is provided with a mounting hole 211, the mounting hole 211 extends along the third direction Z, the fastener is passed through the mounting hole 211 and is connected to the shell 10, and the third direction Z intersects with the first direction X and the second direction Y in pairs.

[0066] Specifically, the fastener may be a fastening bolt, and the specification and model of the fastening bolt may be selected as needed, such as being determined by referring to the aperture of the mounting hole 211 on the first fixing portion 21 and the distance between the first fixing portion 21 and the housing 10 .

[0067] In actual applications, the battery pack may face various working conditions and may need maintenance after long-term use. Fasteners are used to fix the battery module 20 and the shell 10 to facilitate the later disassembly, maintenance or replacement of the battery module 20. Similarly, this fixing method is also convenient for operators to operate in the initial assembly of the battery module 20. The operator only needs to pass the fastener through the mounting hole 211 of the first fixing part 21 and fasten the fastener to the shell 10, thereby improving assembly efficiency.

[0068] Furthermore, the second fixing part 12 may be provided with a bolt hole. After the battery module 20 is installed on the housing 10, the mounting hole 211 of the first fixing part 21 is opposite to the bolt hole on the second fixing part 12. After the fastener is inserted into the first fixing part 21, it can be screwed into the bolt hole of the second fixing part 12 to fix the battery module 20. The bolt hole is provided on the second fixing part 12, which facilitates the operator to tighten the fastener, and the tightening operation can be more labor-saving.

[0069] In the embodiment of the present application, partition ribs 13 are provided in the shell 10 , and the partition ribs 13 are provided between adjacent battery cell modules 20 to divide the accommodating cavity 11 into a plurality of sub-accommodating cavities 11 , and each sub-accommodating cavity 11 is used to set a group of battery cell modules 20 .

[0070] Specifically, each group of battery cell modules 20 is pressed into the sub-accommodating cavity 11 by interference fit, and each sub-accommodating cavity 11 is provided with a second fixing portion 12 that cooperates with the first fixing portion 21 of the battery cell module 20, thereby further ensuring the installation stability of the battery cell module 20 in the sub-accommodating cavity 11.

[0071] In actual applications, when multiple groups of battery cell modules 20 need to be arranged in the shell 10, the multiple groups of battery cell modules 20 are usually assembled into the shell 10 in sequence. When no partition ribs 13 are arranged in the shell 10, the battery cell module 20 assembled first may directly slide to the bottom of the shell 10 when placed in the shell 10 due to the lack of surrounding structure to buffer it. The vibration generated by the fall may cause different degrees of damage to the battery cell module 20, such as cracking of the battery cell bracket 22, loosening of the busbar welding point and other problems. Therefore, partition ribs 13 are arranged in the accommodating cavity 11 of the shell 10 to ensure that one sub-accommodating cavity 11 is used to assemble a group of battery cell modules 20, so as to ensure that each group of battery cell modules 20 is interference fit with the sub-accommodating cavity 11 of the shell 10, thereby preventing the battery cell module 20 from sliding and causing damage or even damage during the assembly process.

[0072] In addition, in the embodiments of the present application, Figure 2 As shown, the battery pack also includes a BMS and a heating module, wherein the BMS and the heating module are arranged on one side of the shell 10 along the first direction X, and the BMS and the heating module in the embodiment of the present application adopt a separate design, so that when repairing the BMS and the heating module, they can be repaired separately or the problematic modules can be directly replaced, thereby improving the convenience of maintenance.

[0073] Reference Figure 8 , showing a cross-sectional view of the battery pack in another direction according to an embodiment of the present application, referring to Fig. 9 , showing Figure 8 The enlarged schematic diagram of part A in the middle is as follows: Figure 8 and Fig. 9 As shown, the high-power components 30 on the BMS are sequentially matched with the thermally conductive foam 31, the heat dissipation block 32, the thermally conductive foam 31, and the housing 10, so that the temperature of the components is conducted to the housing 10 to achieve heat dissipation, thereby protecting the high-power components 30 on the BMS, extending the service life, and helping to save maintenance costs.

[0074] In summary, in the embodiment of the present application, the first fixing portion of the battery cell module is fixedly connected to the second fixing portion of the shell, so that the battery cell module can be fixed on the shell, which enhances the stability of the battery cell module in the battery pack accommodating cavity. The battery cell length of the battery cell module in the battery pack is arranged along the first direction, and the multiple battery cell modules in the accommodating cavity are arranged at intervals along the first direction. At this time, the first fixing portion of the battery cell module is arranged to extend toward the shell along the second direction. Compared with the case where the first fixing portion extends along the first direction, the spacing between adjacent battery cell modules is reduced, so that adjacent battery cell modules can be arranged compactly; in addition, since the battery cell module is provided with a hollow portion opposite to the first fixing portion along the third direction, it can provide an avoidance effect for the second fixing portion of the shell, reduce the size of the battery pack along the second direction, and make the structure of the battery pack more compact, thereby improving the competitiveness of the product.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack having a first direction, a second direction and a third direction intersecting each other, characterized in that: It includes a shell and a plurality of battery modules; wherein, The shell has a receiving cavity, the battery cell module includes a battery cell and a battery cell bracket, the length of the battery cell is arranged along the first direction, and a plurality of the battery cell modules are arranged in the receiving cavity at intervals along the first direction; The battery cell module is provided with a first fixing portion and a hollow portion on at least one side along the second direction, the first fixing portion extends toward the shell along the second direction, the hollow portion and the first fixing portion are arranged opposite to each other along the third direction, the shell is provided with a second fixing portion at a position opposite to the hollow portion, and the first fixing portion is connected to the second fixing portion to fix the battery cell module to the shell.

2. The battery pack according to claim 1, characterized in that: The battery cell support is provided with a battery cell installation groove, and the battery cell is arranged in the battery cell installation groove; the first fixing portion is connected to the battery cell support and extends toward the shell along the second direction.

3. The battery pack according to claim 2, characterized in that: The cell support is provided with first fixing parts on both sides along the second direction.

4. The battery pack according to claim 2, characterized in that: A plurality of the first fixing portions are disposed on at least one side of the battery cell support along the second direction, and the plurality of the first fixing portions are spaced apart along the first direction.

5. The battery pack according to claim 2, characterized in that: The first fixing portion and the battery cell support are separate structures.

6. The battery pack according to claim 2, characterized in that: The first fixing portion and the battery cell support are an integrally formed structure.

7. The battery pack according to claim 2, characterized in that: The battery cell bracket includes a first bracket and a second bracket, wherein the first bracket and the second bracket are arranged opposite to each other along the first direction and are detachably connected; wherein the first fixing portion is arranged on the first bracket and / or the second bracket.

8. The battery pack according to claim 1, characterized in that: The battery pack further includes a fastener, the first fixing portion is provided with a mounting hole, the mounting hole extends along the third direction, the fastener is passed through the mounting hole and connected to the second fixing portion.

9. The battery pack according to claim 1, characterized in that: The accommodating cavity is provided with an opening on at least one side along the third direction, the first fixing portion is arranged close to the opening, and the hollowing portion is arranged away from the opening.

10. The battery pack according to claim 1, characterized in that: The second fixing portion and the housing are integrally formed.

11. The battery pack according to claim 1, characterized in that: Partition ribs are arranged in the shell, and the partition ribs are arranged between adjacent battery core modules to divide the accommodating cavity into a plurality of sub-accommodating cavities, and each sub-accommodating cavity is used to arrange one battery core module.

Images