Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, and the battery pack comprises a box body which is provided with a containing cavity; the plurality of batteries are arranged in the accommodating cavity, and at least part of the batteries are arranged in the first direction; the heating assembly is arranged in the containing cavity, the heating assembly and at least part of the batteries are arranged in the second direction, the heating assembly comprises a heat conduction shell and multiple electric heating cores, the heat conduction shell is provided with a cavity, the multiple electric heating cores are arranged in the cavity, the electric heating cores are in heat conduction connection with the heat conduction shell, at least part of the batteries are in heat conduction connection with the heat conduction shell, and the first direction and the second direction intersect. The influence of a low-temperature environment on the use performance of the battery pack is relieved, and the protection on the battery is improved.

Description

Technical Field

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

[0002] The battery pack generates heat during charging and discharging. A cooling device is typically installed within the battery pack to dissipate this heat. However, when the battery pack is used in a low ambient temperature, it struggles to function properly. Relying solely on the battery pack's own heat is insufficient to mitigate the impact of low temperatures on the battery pack's performance. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack to solve the above-mentioned technical problems; another purpose of the present application is to provide an electrical device using the above-mentioned battery pack.

[0004] Technical solution: A battery pack according to an embodiment of the present application includes:

[0005] A box body having a receiving cavity;

[0006] A plurality of batteries are disposed in the accommodating cavity, with at least some of the batteries arranged along a first direction;

[0007] A heating assembly is provided in the accommodating cavity, the heating assembly and at least part of the batteries are arranged along the second direction, the heating assembly includes a heat-conductive shell and a plurality of electric heating cores, the heat-conductive shell has a cavity, the plurality of electric heating cores are arranged in the cavity, the electric heating cores are heat-conductively connected to the heat-conductive shell, and at least part of the batteries are heat-conductively connected to the heat-conductive shell, and the first direction and the second direction intersect.

[0008] In some embodiments, the battery pack further comprises:

[0009] A temperature-equalizing member is provided in the accommodating cavity, and the temperature-equalizing member is located between the battery and the heat-conducting shell. The battery and the heat-conducting shell are respectively thermally connected to the temperature-equalizing member.

[0010] In some embodiments, the battery pack further comprises:

[0011] A rivet member passes through the heat-conducting shell and the temperature-uniform member to rivet the heat-conducting shell and the temperature-uniform member.

[0012] In some embodiments, the temperature equalizing member and the heat conductive shell are detachably connected.

[0013] In some embodiments, one of the temperature equalizer and the heat-conducting shell is provided with a limiting groove, and the other is provided with a connecting member, which is embedded in the limiting groove to at least limit the separation of the temperature equalizer and the heat-conducting shell along the second direction.

[0014] In some embodiments, the heat-conducting shell includes a first portion, a second portion, a third portion, and a fourth portion, the first portion and the second portion are spaced apart in the second direction, the third portion and the fourth portion are spaced apart in the third direction, the first portion, the second portion, the third portion, and the fourth portion enclose the cavity, and the first direction, the second direction, and the third direction intersect in pairs;

[0015] The first part is thermally connected to the temperature equalizing member. The first part has a first end and a second end opposite to each other in the first direction. Along the second direction, the orthographic projection of the second part on the first part is located between the first end and the second end.

[0016] In some embodiments, at least one of the first portion, the second portion, the third portion, and the fourth portion has a convex surface protruding toward the electric heating core, and the convex surface abuts against the electric heating core.

[0017] In some embodiments, the battery pack further comprises:

[0018] A liquid cooling component is provided in the accommodating cavity, the liquid cooling component and the heat conductive shell are arranged in the third direction, the liquid cooling component and the temperature uniform component are stacked in the second direction, and the liquid cooling component is thermally connected to the temperature uniform component, and the first direction, the second direction and the third direction intersect each other.

[0019] In some embodiments, there are multiple liquid cooling components. In the third direction, the liquid cooling components are respectively provided on opposite sides of the heat-conducting shell, and the multiple liquid cooling components are respectively thermally connected to the temperature equalizing component.

[0020] Correspondingly, an electrical device described in an embodiment of the present application includes the above-mentioned battery pack.

[0021] Beneficial effects: The battery pack of the embodiment of the present application includes a case, a plurality of batteries and a heating assembly. The case has a accommodating cavity, a plurality of batteries and a heating assembly are respectively arranged in the accommodating cavity, at least some of the batteries are arranged along the first direction, and the heating assembly and at least some of the batteries are arranged along the second direction. The heating assembly includes a heat-conducting shell and a plurality of electric heating cores, the heat-conducting shell has a cavity, a plurality of electric heating cores are arranged in the cavity, the electric heating cores are heat-conductively connected to the heat-conductive shell, and at least some of the batteries are heat-conductively connected to the heat-conductive shell. By arranging a plurality of electric heating cores in the heat-conductive shell, and integrating and heat-conductively connecting the plurality of electric heating cores through the heat-conductive shell, it is beneficial to uniformly conduct the heat of the plurality of electric heating cores and heat the plurality of batteries, thereby improving the uniform heating effect of the plurality of electric heating cores, alleviating the impact of the low temperature environment on the performance of the battery pack, and improving the protection of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a schematic cross-sectional structural diagram of a battery pack according to an embodiment of the present application;

[0024] Figure 2 yes Figure 1 Enlarged view of part A;

[0025] Figure 3 This is a schematic diagram of the structure of the liquid cooling element and the temperature equalizing element in an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the exploded structure of the heating assembly and the temperature-regulating member according to an embodiment of the present application;

[0027] Figure 5 Schematic diagram of the cross-sectional structure of the heating assembly and the temperature equalizing member according to an embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the exploded structure of the heating assembly according to an embodiment of the present application;

[0029] Figure 7 This is a schematic structural diagram of a heating assembly and a temperature-regulating member according to another embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the exploded structure of a heating assembly and a temperature-regulating member according to another embodiment of the present application;

[0031] Figure 9 This is a schematic diagram of the exploded structure of a heating assembly and a temperature-regulating member according to another embodiment of the present application;

[0032] Figure 10 1 is a schematic cross-sectional view of a heating assembly and a temperature-regulating member according to another embodiment of the present application;

[0033] Figure 11 This is a schematic diagram of the exploded structure of a heating assembly and a temperature-regulating member according to another embodiment of the present application;

[0034] Figure markings: 1. box body; 10. accommodating cavity; 11. buffer pad; 12. supporting seat; 2. battery; 3. heating component; 30. electric heating core; 31. heat-conducting shell; 310. cavity; 311. limiting groove; 312. first end; 313. second end; 314. first part; 315. second part; 316. third part; 317. fourth part; 318. convex surface; 3180. first convex surface; 3181. second convex surface; 32. insulating film; 33. electrode; 4. temperature equalizing part; 40. connecting part; 41. limiting part; 5. rivet part; 6. liquid cooling part; 60. liquid cooling channel; 61. collecting pipe; 7. thermal conductive adhesive layer; 8. structural adhesive layer; 9. bolt; 90. nut; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0036] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0037] Reference Figures 1 to 11 A battery pack includes a box 1, multiple batteries 2 and a heating component 3.

[0038] The housing 1 has a housing cavity 10, within which are disposed a plurality of batteries 2 and a heating assembly 3. At least some of the batteries 2 are arranged along a first direction X, and the heating assembly 3 and at least some of the batteries 2 are arranged along a second direction Y. The heating assembly 3 includes a heat-conducting shell 31 and a plurality of electric heating cores 30. The heat-conducting shell 31 has a cavity 310, within which the plurality of electric heating cores 30 are arranged. The electric heating cores 30 are thermally connected to the heat-conducting shell 31, and at least some of the batteries 2 are thermally connected to the heat-conducting shell 31.

[0039] It should be noted that, in the embodiment of the present application, a first direction X, a second direction Y and a third direction Z intersecting with each other are introduced. Figure 1 and Figure 3 In this embodiment, multiple batteries 2 are arranged in four groups as an example. Each group of batteries 2 includes multiple batteries 2 arranged along a first direction X. The four groups of batteries 2 are arranged at intervals along a second direction Y. The third direction Z is parallel to the height direction of the batteries 2. In this embodiment, a heating assembly 3 is provided for each group of batteries 2 to ensure a heating effect for each group of batteries 2.

[0040] By arranging multiple electric heating cores 30 in the heat-conducting shell 31, and integrating and heat-conducting the multiple electric heating cores 30 through the heat-conducting shell 31, it is beneficial to evenly conduct the heat of the multiple electric heating cores 30 and heat the multiple batteries 2, thereby improving the uniform heating effect of the multiple electric heating cores 30, alleviating the impact of the low temperature environment on the performance of the battery pack, and improving the protection of the battery 2.

[0041] In some embodiments, reference Figures 2 to 5 The battery pack also includes a temperature equalizer 4, which is arranged in the accommodating cavity 10. The temperature equalizer 4 is located between the battery 2 and the heat-conducting shell 31, and the battery 2 and the heat-conducting shell 31 are respectively thermally connected to the temperature equalizer 4.

[0042] Specifically, the temperature-regulating element 4 can be constructed of a heat-conducting metal plate and stacked between the heat-conducting shell 31 and the battery cells 2. In this embodiment, a temperature-regulating element 4 is provided for each battery cell group 2. This temperature-regulating element 4 further enhances the heating and temperature-regulating effect of the electric heating core 30. Furthermore, providing a separate temperature-regulating element 4 for each heat-conducting shell 31 and each battery cell group 2 reduces the overall weight of the battery pack and saves material, compared to using a single plate to connect the heat-conducting shells 31 corresponding to each battery cell group 2.

[0043] In some embodiments, reference Figure 4 and Figure 5The battery pack further includes rivets 5. The rivets 5 extend through the heat-conducting shell 31 and the temperature-regulating element 4, thereby riveting the heat-conducting shell 31 and the temperature-regulating element 4 together. Specifically, in this embodiment, each heat-conducting shell 31 and the temperature-regulating element 4 are riveted together using two rivets 5, with the two rivets 5 correspondingly positioned at either end of the heat-conducting shell 31 in the first direction X. In other embodiments, the number of rivets 5 can be flexibly increased or decreased based on structural strength requirements, which will not be further described here.

[0044] In addition, it should be noted that in order to prevent the rivet 5 from affecting the flatness of the surface of the temperature equalizer 4 facing the battery 2, the end of the rivet 5 facing the battery 2 is embedded in the temperature equalizer 4, and at least it is necessary to ensure that the end of the rivet 5 facing the battery 2 does not protrude from the surface of the temperature equalizer 4.

[0045] Compared with directly welding the temperature-regulating member 4 and the heat-conducting shell 31 , the use of riveting members 5 for riveting is beneficial to avoiding deformation of the temperature-regulating member 4 caused by high-temperature welding, thereby reducing the impact on the surface flatness of the temperature-regulating member 4 and ensuring uniform heat conduction of the temperature-regulating member 4 .

[0046] In some embodiments, reference Figure 6 In the embodiment of the present application, the electric heating core 30 may adopt a positive temperature coefficient (PTC) heating element. The multiple electric heating cores 30 in each heat-conducting shell 31 are arranged along the first direction X, and the electric heating core 30 is attached to both sides of the second direction Y with electrodes 33. The outer sides of the multiple electric heating cores 30 and the electrodes 33 are also covered with an insulating film 32 to ensure that the electric heating core 30 is insulated and fits the heat-conducting shell 31. The heating principle of the PTC heating element is existing technology and will not be described in detail here. In other embodiments, the electric heating core 30 may also adopt heating elements with other heating principles, which will not be listed here one by one.

[0047] In some embodiments, reference Figure 2 and Figure 5 The heat-conducting housing 31 includes a first portion 314, a second portion 315, a third portion 316, and a fourth portion 317. The first portion 314 and the second portion 315 are spaced apart in the second direction Y, and the third portion 316 and the fourth portion 317 are spaced apart in the third direction Z. The first portion 314, the second portion 315, the third portion 316, and the fourth portion 317 enclose a cavity 310. In this embodiment, the first portion 314, the second portion 315, the third portion 316, and the fourth portion 317 can be integrally formed. In other embodiments, the first portion 314, the second portion 315, the third portion 316, and the fourth portion 317 can also be separate structures, which will not be described in detail here.

[0048] The first portion 314 is thermally connected to the temperature-regulating member 4. The first portion 314 has a first end 312 and a second end 313 that are oppositely disposed in the first direction X. Along the second direction Y, the orthographic projection of the second portion 315 on the first portion 314 is located between the first end 312 and the second end 313. In the first direction X, the first end 312 and the second end 313 both protrude beyond the ends of the second portion 315, thereby providing space for the rivet 5 to be disposed in the second direction Y. At the same time, this ensures that the first portion 314 can be thermally connected to the temperature-regulating member 4 with a larger contact area. Furthermore, this helps reduce the weight of the overall heat-conducting shell 31, thereby reducing the weight of the entire battery pack.

[0049] In some embodiments, reference Figure 2 and Figure 7 At least one of the first portion 314 , the second portion 315 , the third portion 316 and the fourth portion 317 has a convex surface 318 protruding toward the electric heating core 30 , and the convex surface 318 abuts against the electric heating core 30 .

[0050] In this embodiment, the convex surface 318 includes a first convex surface 3180 and a second convex surface 3181. The surface of the third portion 316 facing the fourth portion 317 is the first convex surface 3180, and the surface of the fourth portion 317 facing the third portion 316 is the second convex surface 3181. The third portion 316 and the fourth portion 317 form abutment and fixation on the electric heater core 30 through the first convex surface 3180 and the second convex surface 3181, thereby improving the stability of the electric heater core 30 within the cavity 310.

[0051] In some embodiments, reference Figures 2 to 5 The battery pack also includes a liquid cooling element 6. The liquid cooling element 6 is provided in the accommodating chamber 10. The liquid cooling element 6 and the heat-conducting shell 31 are arranged in the third direction Z. The liquid cooling element 6 and the temperature-equalizing element 4 are stacked in the second direction Y, and the liquid cooling element 6 is thermally connected to the temperature-equalizing element 4. In addition to ensuring the performance of the battery 2 in a low-temperature environment, the provision of the liquid cooling element 6 is beneficial for providing timely heat dissipation protection for the battery 2 during use. Similarly, the liquid cooling element 6 achieves uniform heat exchange with the battery 2 through the temperature-equalizing element 4. In this embodiment, a liquid cooling element 6 is provided for each group of batteries 2. The liquid cooling element 6 can adopt a harmonica tube structure extending along the first direction X, and a liquid cooling channel 60 for the circulation of liquid cooling medium is formed inside the liquid cooling element 6. In addition, a plurality of collecting pipes 61 are provided in the accommodating chamber 10 to connect the plurality of liquid cooling elements 6, so that the liquid cooling medium can be circulated synchronously in the plurality of liquid cooling elements 6.

[0052] In some embodiments, reference Figures 2 to 4Multiple liquid cooling elements 6 are provided. In the third direction Z, liquid cooling elements 6 are provided on opposite sides of the heat-conducting shell 31, and each of the liquid cooling elements 6 is thermally connected to the temperature-balancing element 4. In this embodiment, two liquid cooling elements 6 are provided for each heat-conducting shell 31, with the heat-conducting shell 31 positioned between the two liquid cooling elements 6. Accordingly, the temperature-balancing element 4 needs to be flexibly adjusted based on the dimensions of the heat-conducting shell 31 and the liquid cooling elements 6 to ensure that the temperature-balancing element 4 can fully contact the two liquid cooling elements 6 and the heat exchange surface of the heat-conducting shell 31 facing the battery 2.

[0053] In some embodiments, reference Figure 2 and Figure 4 In order to facilitate the rapid positioning of the installation position of the temperature equalizing element 4 and improve the stability of the temperature equalizing element 4, the temperature equalizing element 4 is provided with a limiting portion 41 extending toward the side of the liquid cooling element 6 at both ends in the third direction Z. Each temperature equalizing element 4 clamps the liquid cooling element 6 through two oppositely arranged limiting portions 41 to facilitate the rapid fixing of the temperature equalizing element 4.

[0054] Furthermore, in some embodiments, reference Figures 7 to 11 The temperature-isolating member 4 and the heat-conducting shell 31 may also be configured to be detachably connected.

[0055] In some embodiments, reference Figure 7 and Figure 8 The battery pack also includes bolts 9 and nuts 90. Unlike the rivets 5 used to rivet the temperature-regulating element 4 and the thermally conductive shell 31, the bolts 9 and nuts 90 are used to lock the temperature-regulating element 4 and the thermally conductive shell 31, facilitating flexible disassembly of the temperature-regulating element 4 and the thermally conductive shell 31. Since the second portion 315 is shorter than the first portion 314 in the first direction X, this provides ample space for disassembly and assembly of the bolts 9 and nuts 90.

[0056] In some embodiments, reference Figures 9 to 11 In addition to the bolts 9 and nuts 90, the temperature-regulating element 4 and the heat-conducting housing 31 can also be connected by a mortise and tenon structure to achieve a detachable connection. One of the temperature-regulating element 4 and the heat-conducting housing 31 is provided with a limiting groove 311, and the other is provided with a connecting member 40. The connecting member 40 is embedded in the limiting groove 311 to at least limit the separation of the temperature-regulating element 4 and the heat-conducting housing 31 along the second direction Y.

[0057] Specifically, refer to Figures 9 to 11For example, a connector 40 is provided on the side of the temperature-regulating element 4 facing the corresponding heat-conducting shell 31, and a retaining groove 311 is provided on the heat-conducting shell 31. To ensure the stability of the connection between the temperature-regulating element 4 and the heat-conducting shell 31, retaining grooves 311 are provided at both ends of the heat-conducting shell 31 in the first direction X. To facilitate assembly and disassembly of the heat-conducting shell 31 and the temperature-regulating element 4, both retaining grooves 311 extend through the corresponding end surfaces of the heat-conducting shell 31 along the first direction X. To ensure that the retaining grooves 311 have sufficient extension length in the first direction X, pre-align one set of retaining grooves 311 with the connector 40, and then push the temperature-regulating element 4 until the other set of retaining grooves 311 and the connector 40 are aligned.

[0058] The connecting member 40 may be a Figure 9 and Figure 10 The dovetail block structure in Figure 11 The T-shaped block structure ensures that the connecting part 40 can pass through the limiting groove 311 in the second direction Y, and ensures that the size of the connecting part 40 on the side of the heat-conducting shell 31 away from the temperature equalizing part 4 is larger than the size of the limiting groove 311, thereby limiting the connecting part 40 from detaching from the limiting groove 311 in the second direction Y.

[0059] In addition, in order to improve the thermal conductivity and connection stability between the battery 2 and the temperature equalizer 4, in some embodiments, a thermal conductive adhesive layer 7 is further provided between the battery 2 and the temperature equalizer 4. The battery 2 and the temperature equalizer 4 are bonded together by the thermal conductive adhesive layer 7 to further improve the heat exchange effect of the temperature equalizer 4 and at the same time improve the stability of the battery 2 fixed on the temperature equalizer 4.

[0060] In addition, in order to improve the protection of the battery 2, the heat-conducting shell 31, the temperature-constant component 4 and the liquid cooling component 6, in some embodiments, reference is made to Figure 2 The battery pack further includes a cushion 11 and a support 12. The support 12 can be disposed within the accommodating cavity 10 and connected to the inner bottom wall of the housing 1. The support 12 can conform to the shape of the inner bottom wall of the housing 1 to provide a stable support and a relatively flat placement surface for the entire battery 2, heat-conducting shell 31, temperature-regulating element 4, and liquid-cooling element 6.

[0061] The cushioning pad 11 can be made of foam. In this embodiment, each of the two liquid cooling elements 6 corresponding to each battery pack 2 is connected to a cushioning pad 11. The cushioning pad 11 is located on the side of the liquid cooling element 6 facing the support seat 12. The cushioning pad 11 connects the liquid cooling element 6 and the support seat 12, further improving the cushioning protection of the battery 2, the heat-conducting shell 31, the temperature-regulating element 4, and the liquid cooling element 6.

[0062] In addition, in order to improve the connection stability between the heat-conducting shell 31 and the supporting seat 12, in some embodiments, referring to Figure 2A structural adhesive layer 8 may be further provided between the heat-conducting shell 31 and the supporting seat 12 , and the heat-conducting shell 31 and the supporting seat 12 may be bonded together by the structural adhesive layer 8 to further improve the stability of the heat-conducting shell 31 .

[0063] Accordingly, embodiments of the present application provide an electrical device comprising the aforementioned battery pack. The electrical device may be an electronic device, a power storage device, or a powered vehicle. It is understood that the electrical device may possess all the technical features and corresponding beneficial effects of the aforementioned battery pack, and further details are omitted here.

[0064] The above is a detailed introduction to a battery pack and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A box body having a receiving cavity; A plurality of batteries are disposed in the accommodating cavity, with at least some of the batteries arranged along a first direction; A heating assembly is provided in the accommodating cavity, the heating assembly and at least part of the batteries are arranged along the second direction, the heating assembly includes a heat-conductive shell and a plurality of electric heating cores, the heat-conductive shell has a cavity, the plurality of electric heating cores are arranged in the cavity, the electric heating cores are heat-conductively connected to the heat-conductive shell, and at least part of the batteries are heat-conductively connected to the heat-conductive shell, and the first direction and the second direction intersect.

2. The battery pack according to claim 1, wherein: The battery pack further includes: A temperature-equalizing member is provided in the accommodating cavity, and the temperature-equalizing member is located between the battery and the heat-conducting shell. The battery and the heat-conducting shell are respectively thermally connected to the temperature-equalizing member.

3. The battery pack according to claim 2, wherein: The battery pack further includes: A rivet member passes through the heat-conducting shell and the temperature-uniform member to rivet the heat-conducting shell and the temperature-uniform member.

4. The battery pack according to claim 2, wherein: The temperature equalizing member and the heat-conducting shell are detachably connected.

5. The battery pack according to claim 4, characterized in that: One of the temperature-balancing component and the heat-conducting shell is provided with a limiting groove, and the other is provided with a connecting member, which is embedded in the limiting groove to at least limit the temperature-balancing component and the heat-conducting shell from separating along the second direction.

6. The battery pack according to any one of claims 3 to 5, characterized in that: The heat-conducting shell includes a first portion, a second portion, a third portion, and a fourth portion, wherein the first portion and the second portion are spaced apart in the second direction, and the third portion and the fourth portion are spaced apart in the third direction. The first portion, the second portion, the third portion, and the fourth portion enclose the cavity, and the first direction, the second direction, and the third direction intersect with each other. The first part is thermally connected to the temperature equalizing member. The first part has a first end and a second end opposite to each other in the first direction. Along the second direction, the orthographic projection of the second part on the first part is located between the first end and the second end.

7. The battery pack according to claim 6, characterized in that: At least one of the first portion, the second portion, the third portion, and the fourth portion has a convex surface protruding toward the electric heating core, and the convex surface abuts against the electric heating core.

8. The battery pack according to claim 2, wherein: The battery pack further includes: A liquid cooling component is provided in the accommodating cavity, the liquid cooling component and the heat conductive shell are arranged in the third direction, the liquid cooling component and the temperature uniform component are stacked in the second direction, and the liquid cooling component is thermally connected to the temperature uniform component, and the first direction, the second direction and the third direction intersect each other.

9. The battery pack according to claim 8, characterized in that: There are multiple liquid cooling components. In the third direction, the liquid cooling components are respectively provided on two opposite sides of the heat-conducting shell, and the multiple liquid cooling components are respectively thermally connected to the temperature-uniform component.

10. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9.

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