Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and belongs to the technical field of batteries, and the battery pack comprises a box body, battery monomers, an output electrode base and a heat conduction assembly, the box body comprises an end plate and a bottom plate connected with the end plate, the end plate and the bottom plate define a containing cavity, the end plate is provided with a mounting groove, and the mounting groove penetrates through the surface, away from the bottom plate, of the end plate in the height direction. And the battery monomers are arranged in the accommodating cavities. The output pole base comprises a body and a protruding part connected with the body, the protruding part is arranged in the installation groove, and the side, close to the protruding part, of the body is connected with the end plate. The output pole base is provided with a limiting groove which penetrates through the body and the protruding part in the height direction. And the heat conduction assembly is arranged in the mounting groove, the heat conduction assembly comprises a first heat conduction part, and the first heat conduction part is connected with the side, away from the body, of the protruding part and covers and seals the limiting groove so as to conduct out heat of the output electrode base, so that the heat dissipation efficiency can be improved, the overheating risk can be reduced, the battery cell can be kept in a normal working temperature interval, and the battery cell is prevented from losing efficacy.

Description

Technical Field

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

[0002] As the power source of electric vehicles, batteries are very sensitive to temperature. Generally speaking, batteries can be used in the temperature range of -20 to 55°C, and the performance of the battery cells can be maximized in the temperature range of 20 to 45°C. Too high or too low temperatures will greatly reduce the performance of the battery. Therefore, current battery systems are equipped with thermal management equipment to enable the battery to operate in the temperature range of 20 to 45°C. With the continuous increase in the requirements for energy density and fast charging capabilities, the layout of the current battery system is becoming more and more compact, and the battery heat is also increasing. The fuses, relays and other electrical components with high heat generation in the battery system will also be concentrated near the battery, making thermal management more difficult. The heat generated by the electrical components will flow back into the battery cells, which may cause extreme safety accidents such as thermal runaway and sudden loss of power in the battery system. In the related art, a thermal pad is placed between the copper busbar and the end plate for heat dissipation, but electric vehicles will face frequent vibration conditions. The method of setting a thermal pad between the copper busbar and the end plate is unstable and prone to displacement, which reduces the heat dissipation effect. Utility Model Content

[0003] Purpose of the utility model: The embodiments of the present application provide a battery pack and an electrical device, aiming to solve the technical problem of how to stably improve the heat dissipation effect.

[0004] Technical solution: The embodiment of the present application provides a battery pack, including:

[0005] The box body comprises an end plate and a bottom plate connected to the end plate, the end plate and the bottom plate enclose a receiving cavity, the end plate has a mounting groove, the mounting groove penetrates the surface of the end plate away from the bottom plate along the height direction, and the box body has a height direction;

[0006] A battery cell is arranged in the accommodating cavity;

[0007] The output pole base comprises a body and a protrusion connected to the body, the protrusion is arranged in the mounting groove, and the side of the body close to the protrusion is connected to the end plate; the output pole base has a limiting groove, and the limiting groove passes through the body and the protrusion in the height direction;

[0008] The heat conduction component is arranged in the installation groove, and the heat conduction component includes a first heat conduction part, which is connected to the side of the protrusion away from the body and covers the limiting groove to conduct heat from the output pole base.

[0009] In some embodiments, the heat-conducting assembly includes a second heat-conducting portion connected to a side of the first heat-conducting portion away from the body.

[0010] In some embodiments, an orthographic projection of the first heat conducting portion along the height direction is located within the protruding portion.

[0011] In some embodiments, the mounting groove has an inner wall, and the second heat conducting portion is connected to the inner wall.

[0012] In some embodiments, the heat conducting component includes at least one third heat conducting portion, and the third heat conducting portion is connected to a side of the second heat conducting portion away from the body.

[0013] In some embodiments, the mounting groove has an inner wall, and the at least one third heat conducting portion is connected to the inner wall.

[0014] In some embodiments, the heat conducting component includes an insulating layer, which is located between the first heat conducting portion and the protruding portion and is respectively connected to the first heat conducting portion and the protruding portion.

[0015] In some embodiments, the heat-conducting component includes a heat-conducting adhesive layer, which is located between the first heat-conducting portion and the second heat-conducting portion and is connected to the first heat-conducting portion and the second heat-conducting portion, respectively.

[0016] In some embodiments, the end plate has a positioning groove, which penetrates the surface of the end plate away from the bottom plate in the height direction, and is connected to the mounting groove. At least a part of the body is embedded in the positioning groove.

[0017] In some embodiments, the main body includes a first surface and a second surface arranged opposite to each other in a height direction, the second surface is connected to the protrusion, the main body has a receiving groove, the receiving groove has an opening, the opening passes through the first surface, the receiving groove is connected to the limiting groove, and the battery pack includes a first connecting plate and a second connecting plate, at least a portion of the first connecting plate and at least a portion of the second connecting plate are located in the receiving groove.

[0018] Accordingly, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery pack, and the battery pack is used to supply power to the electrical device.

[0019] Beneficial effects: The battery pack of the embodiment of the present application includes a box body, a battery cell, an output pole base and a heat-conducting component. The box body includes an end plate and a bottom plate connected to the end plate, the end plate and the bottom plate enclose a receiving cavity, the end plate has a mounting groove, the mounting groove penetrates the surface of the end plate away from the bottom plate in the height direction, and the box body has a height direction. The battery cell is arranged in the receiving cavity. The output pole base includes a main body and a protrusion connected to the main body, the protrusion is arranged in the mounting groove, and the side of the main body close to the protrusion is connected to the end plate; the output pole base has a limiting groove, and the limiting groove penetrates the main body and the protrusion in the height direction. The heat-conducting component is arranged in the mounting groove, the heat-conducting component includes a first heat-conducting part, the first heat-conducting part is connected to the side of the protrusion away from the main body, and the limiting groove is covered to export the heat of the output pole base. The output pole base is connected with the mounting groove of the end plate in a cooperative manner, and the heat-conducting component is located in the mounting groove and connected to the output pole base, which can improve the connection stability of the heat-conducting component. The heat is transferred to the first heat conducting part through the limiting groove and dissipated, thereby improving the heat dissipation efficiency, reducing the risk of overheating, and helping to keep the battery cells in the battery cell within the normal operating temperature range to avoid battery cell failure.

[0020] The electric device of the embodiment of the present application includes the above-mentioned battery pack, so the electric device can have all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

[0022] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0023] Figure 2 yes Figure 1 A magnified view of part A;

[0024] Figure 3 is a schematic structural diagram of a battery pack according to another embodiment of the present application;

[0025] Figure 4 yes Figure 3 A magnified view of part B;

[0026] Figure 5 It is a structural schematic diagram of an output pole base according to an embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of an output pole base according to another embodiment of the present application;

[0028] Figure 7 This is a structural schematic diagram of an output pole base according to another embodiment of the present application;

[0029] Figure 8 This is a structural schematic diagram of an output pole base in yet another embodiment of the present application;

[0030] Fig. 9 It is a bottom view of an output pole base of an embodiment of the present application;

[0031] Fig.10 It is a bottom view of an output pole base according to another embodiment of the present application.

[0032] Figure numerals: 1, box body; 2, battery cell; 3, output pole base; 4, heat-conducting component; 5, first connecting plate; 6, second connecting plate; 7, fastener; 8, battery cell connecting plate; 10, end plate; 11, bottom plate; 12, accommodating cavity; 20, battery cell; 30, main body; 31, protrusion; 32, limiting groove; 40, first heat-conducting part; 41, second heat-conducting part; 42, third heat-conducting part; 43, insulating layer; 44, thermally conductive adhesive layer; 50, first sub-part; 51, second sub-part; 52, bending part; 100, mounting groove; 101, positioning groove; 300, first surface; 301, second surface; 302, accommodating groove; 1000, inner wall; 3020, opening; X, height direction. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, 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 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. Thus, 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. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0035] As the power source of electric vehicles, batteries are very sensitive to temperature. Generally speaking, batteries can be used in the temperature range of -20 to 55°C, and the performance of the battery cells can be maximized in the temperature range of 20 to 45°C. Too high or too low temperatures will greatly reduce the performance of the battery. Therefore, current battery systems are equipped with thermal management equipment to enable the battery to operate in the temperature range of 20 to 45°C. With the continuous increase in the requirements for energy density and fast charging capabilities, the layout of the current battery system is becoming more and more compact, and the battery heat is also increasing. The fuses, relays and other electrical components with high heat generation in the battery system will also be concentrated near the battery, making thermal management more difficult. The heat generated by the electrical components will flow back into the battery cells, which may cause extreme safety accidents such as thermal runaway and sudden loss of power in the battery system. In the related art, a thermal pad is placed between the copper busbar and the end plate for heat dissipation, but electric vehicles will face frequent vibration conditions. The method of setting a thermal pad between the copper busbar and the end plate is unstable and prone to displacement, which reduces the heat dissipation effect.

[0036] In view of this, an embodiment of the present application provides a battery pack, including a box body, a battery cell, an output pole base and a heat-conducting component. The box body includes an end plate and a bottom plate connected to the end plate, the end plate and the bottom plate enclose a receiving cavity, the end plate has a mounting groove, the mounting groove penetrates the surface of the end plate away from the bottom plate in the height direction, and the box body has a height direction. The battery cell is arranged in the receiving cavity. The output pole base includes a body and a protrusion connected to the body, the protrusion is arranged in the mounting groove, and the side of the body close to the protrusion is connected to the end plate; the output pole base has a limiting groove, and the limiting groove penetrates the body and the protrusion in the height direction. The heat-conducting component is arranged in the mounting groove, the heat-conducting component includes a first heat-conducting part, the first heat-conducting part is connected to the side of the protrusion away from the body, and the limiting groove is covered to export the heat of the output pole base. The output pole base is connected with the mounting groove of the end plate, and the heat-conducting component is located in the mounting groove and connected to the output pole base, which can improve the connection stability of the heat-conducting component. The heat is transferred to the first heat conducting part through the limiting groove and dissipated, thereby improving the heat dissipation efficiency, reducing the risk of overheating, and helping to keep the battery cells in the battery cell within the normal operating temperature range to avoid battery cell failure.

[0037] The battery pack and the electric device of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0038] Figure 1 It is a schematic diagram of the structure of a battery pack according to an embodiment of the present application. Figure 2 yes Figure 1 Enlarged view of part A. Figure 3 It is a schematic structural diagram of a battery pack according to another embodiment of the present application. Figure 4 yes Figure 3 Enlarged view of part B. Figure 5 It is a structural schematic diagram of an output pole base 3 of an embodiment of the present application. Figure 6 It is a structural schematic diagram of an output pole base 3 according to another embodiment of the present application. Figure 7 It is a structural schematic diagram of an output pole base 3 of another embodiment of the present application. Figure 8 It is a structural schematic diagram of an output pole base 3 of yet another embodiment of the present application. Fig. 9 It is a bottom view of an output pole base 3 according to an embodiment of the present application. Fig.10 It is a bottom view of an output pole base 3 according to another embodiment of the present application.

[0039] refer to Figures 1 to 10The embodiment of the present application provides a battery pack, including a case 1, a battery cell 2, an output pole base 3 and a heat-conducting component 4. The case 1 includes an end plate 10 and a bottom plate 11 connected to the end plate 10, the end plate 10 and the bottom plate 11 enclose a receiving cavity 12, the end plate 10 has a mounting groove 100, the mounting groove 100 penetrates the surface of the end plate 10 away from the bottom plate 11 along the height direction X, and the case 1 has a height direction X. The battery cell 2 is arranged in the receiving cavity 12. The output pole base 3 includes a main body 30 and a protrusion 31 connected to the main body 30, the protrusion 31 is arranged in the mounting groove 100, and the side of the main body 30 close to the protrusion 31 is connected to the end plate 10; the output pole base 3 has a limiting groove 32, and the limiting groove 32 penetrates the main body 30 and the protrusion 31 along the height direction X. The heat-conducting component 4 is arranged in the mounting groove 100. The heat-conducting component 4 includes a first heat-conducting part 40. The first heat-conducting part 40 is connected to the side of the protrusion 31 away from the body 30, and covers the limiting groove 32 to conduct the heat of the output pole base 3. The output pole base 3 is connected with the mounting groove 100 of the end plate 10. The heat-conducting component 4 is located in the mounting groove 100 and connected to the output pole base 3, which can improve the connection stability of the heat-conducting component 4. The heat of the battery cell 20 of the battery cell 2 and the electrical components in the battery pack is transferred to the first heat-conducting part 40 through the limiting groove 32 and dissipated, thereby improving the heat dissipation efficiency, reducing the risk of overheating, and helping to maintain the battery cell 20 in the normal operating temperature range to avoid failure of the battery cell 20.

[0040] exist Figure 7 and Figure 8 In the illustrated embodiment, the first heat-conducting portion 40 is connected to the side of the protrusion 31 away from the body 30, and covers the limiting groove 32, and the orthographic projection of the first heat-conducting portion 40 along the height direction X is located inside the protrusion 31. The first heat-conducting portion 40 can be a metal layer, and the metal has good thermal conductivity and can effectively conduct and disperse heat. In the embodiment of the present application, the body 30 is generally used to accommodate the first connecting piece 5 and the second connecting piece 6, and the fastener 7 is penetrated through the first connecting piece 5, the second connecting piece 6 and the limiting groove 32 to achieve electrical connection between the first connecting piece 5 and the second connecting piece 6. The first heat-conducting portion 40 covered in the limiting groove 32 can quickly transfer the heat received by the output pole base 3 to the surface of the first heat-conducting portion 40, thereby improving the heat dissipation efficiency and reducing the risk of overheating. By limiting the size of the first heat conducting part 40 relative to the protrusion 31 so that the orthographic projection of the first heat conducting part 40 along the height direction X is located within the protrusion 31, the first heat conducting part 40 can be prevented from contacting the metal end plate 10, thereby maintaining the insulation and isolation state of the battery cell 2, thereby improving the safety of the battery pack.

[0041] exist Figure 7 and Figure 8In the illustrated embodiment, the heat-conducting component 4 includes an insulating layer 43, and the insulating layer 43 is located between the first heat-conducting part 40 and the protrusion 31 and is respectively connected to the first heat-conducting part 40 and the protrusion 31. Further, the mounting groove 100 has an inner wall 1000, and the insulating layer 43 is located on the side of the first heat-conducting part 40 facing the inner wall 1000 and is connected to the first heat-conducting part 40. Such an arrangement can avoid the first heat-conducting part 40 from contacting the metal end plate 10, maintain the insulation and isolation state of the battery cell 2, and thus improve the safety of the battery pack. Specifically, the insulating layer 43 can be an insulating material such as polyvinyl chloride, polyester resin, epoxy resin, etc., and can be applied to the surface of the first heat-conducting part 40 by spraying to form an insulating film, or can be wrapped on the surface of the first heat-conducting part 40 by wrapping, and the present application does not limit this.

[0042] exist Figures 5 to 10 In the illustrated embodiment, the heat conducting component 4 includes a second heat conducting portion 41, and the second heat conducting portion 41 is connected to the side of the first heat conducting portion 40 away from the body 30. Heat is transferred to the first heat conducting portion 40 through the first connecting piece 5, the second connecting piece 6 and the fastener 7 in the limiting groove 32. By providing the second heat conducting portion 41, the heat received by the first heat conducting portion 40 can be transferred to the second heat conducting portion 41. By increasing the surface area of ​​the heat conducting component 4, the heat dissipation efficiency of the heat conducting component 4 can be effectively improved, the heat diffusion capacity can be enhanced, the risk of overheating can be reduced, and it is helpful to maintain the battery cell 20 in the battery cell 2 in the normal working temperature range to avoid failure of the battery cell 20.

[0043] exist Figures 5 to 8 In the illustrated embodiment, the heat-conducting component 4 includes a heat-conducting adhesive layer 44, which is located between the first heat-conducting part 40 and the second heat-conducting part 41 and connected to the first heat-conducting part 40 and the second heat-conducting part 41, respectively. The heat-conducting adhesive layer 44 of the present application can play a role in heat conduction and insulation, thereby achieving adhesion, insulation and heat conduction between the first heat-conducting part 40 and the second heat-conducting part 41. Specifically, the heat-conducting adhesive layer 44 can be a material with good thermal conductivity and insulation properties such as thermosetting heat-conducting adhesive, non-silicone-based heat-conducting adhesive or insulating heat-conducting adhesive, and the present application does not limit this.

[0044] In some embodiments, the mounting groove 100 has an inner wall 1000, and the second heat conducting part 41 is connected to the inner wall 1000. The size of the second heat conducting part 41 is adjusted so that at least one side of the second heat conducting part 41 is attached to the inner wall 1000. In this way, heat can be transferred to the end plate 10 through the second heat conducting part 41, thereby further improving the heat dissipation efficiency of the heat conducting component 4, and improving the connection stability between the heat conducting component 4 and the output pole base 3 connected to the heat conducting component 4.

[0045] exist Figure 6 , Figure 8 and Fig.10In the illustrated embodiment, the heat conducting component 4 includes at least one third heat conducting portion 42, and the third heat conducting portion 42 is connected to the side of the second heat conducting portion 41 away from the body 30. Heat is transferred to the first heat conducting portion 40 and the second heat conducting portion 41 through the first connecting piece 5, the second connecting piece 6 and the fastener 7 in the limiting groove 32. The size of the third heat conducting portion 42 can be adjusted according to the heat generation of the battery cell 20 and the electrical parts to further increase the surface area of ​​the heat conducting component 4, thereby effectively improving the heat dissipation efficiency of the heat conducting component 4, reducing the risk of overheating, and helping to maintain the battery cell 20 in the normal working temperature range to avoid failure of the battery cell 20.

[0046] In some embodiments, the mounting groove 100 has an inner wall 1000, and at least one third heat conducting portion 42 is connected to the inner wall 1000. Figure 6 , Figure 8 and Fig.10 In the illustrated embodiment, the third heat-conducting portion 42 extends along the height direction X and is connected to the inner wall 1000. With such a configuration, heat can be transferred to the end plate 10 through the third heat-conducting portion 42, thereby further improving the heat dissipation efficiency of the heat-conducting component 4 and improving the connection stability between the heat-conducting component 4 and the output pole base 3 connected to the heat-conducting component 4.

[0047] In some embodiments, the end plate 10 has a positioning groove 101, which penetrates the surface of the end plate 10 away from the bottom plate 11 along the height direction X, and the positioning groove 101 is connected to the installation groove 100, and at least a part of the body 30 is embedded in the positioning groove 101. Figure 2 In the illustrated embodiment, one end of the body 30 facing the battery cell 2 is disposed in contact with the inner wall 1000 of the mounting groove 100 , and one end of the body 30 away from the battery cell 2 is embedded in the positioning groove 101 , thereby improving the connection stability of the output pole base 3 .

[0048] exist Figures 1 to 4In the illustrated embodiment, the body 30 includes a first surface 300 and a second surface 301 that are arranged opposite to each other along the height direction X, the second surface 301 is connected to the protrusion 31, the body 30 has a receiving groove 302, the receiving groove 302 has an opening 3020, the opening 3020 runs through the first surface 300, the receiving groove 302 is connected to the limiting groove 32, and the battery pack includes a first connecting piece 5 and a second connecting piece 6, at least part of the first connecting piece 5 and at least part of the second connecting piece 6 are located in the receiving groove 302. In the embodiment of the present application, the battery pack includes a battery cell 20 and a battery cell connecting piece 8, and the battery cell connecting piece 8 is used for the electrical series and parallel connection of the battery cell 20. The first connecting piece 5 is the total positive battery cell connecting piece of the battery pack or the negative battery cell connecting piece of the battery pack, which is used to connect the entire high-voltage electricity, and the material of the first connecting piece 5 can be aluminum or copper. The second connecting piece 6 is a copper busbar wire, which is used for electrical overcurrent, one end of the second connecting piece 6 is connected to the first connecting piece 5, and the other end of the second connecting piece 6 is usually connected to a high-voltage electrical component such as a fuse or a relay. The body 30 and the protrusion 31 are made of plastic. At least part of the first connecting piece 5 and the second connecting piece 6 are embedded in the receiving groove 302 of the body 30 to achieve fixation and electrical insulation of the first connecting piece 5 and the second connecting piece 6.

[0049] exist Figure 2 and Figure 4 In the illustrated embodiment, the first connecting sheet 5 includes a first sub-portion 50, a second sub-portion 51 and a bending portion 52. The bending portion 52 is located between the first sub-portion 50 and the second sub-portion 51 and connects the first sub-portion 50 and the second sub-portion 51. The first sub-portion 50 is connected to a side of the battery cell 2 away from the bottom plate 11, and the second sub-portion 51 is connected to a side of the body 30 away from the bottom plate 11. The bending portion 52 and the second sub-portion 51 are located in the accommodating groove 302.

[0050] exist Figure 2 and Figure 4 In the illustrated embodiment, the battery pack further includes a fastener 7, the second connecting piece 6 is connected to the second sub-portion 51 on one side close to the protrusion 31, the first connecting piece 5 and the second sub-portion 51 have a limiting hole, the limiting hole is connected to the limiting groove 32, and the fastener 7 is passed through the limiting hole and the limiting groove 32. In the embodiment of the present application, the limiting groove 32 is a metal threaded hole, and the fastener 7 is a fixing bolt, which is used to achieve electrical connection between the first connecting piece 5 and the second connecting piece 6. Heat is transferred to the heat-conducting component 4 through the first connecting piece 5, the second connecting piece 6 and the fastener 7 and dissipated, thereby improving the heat dissipation efficiency, reducing the risk of overheating, and helping to maintain the battery cell 20 in the normal operating temperature range to avoid failure of the battery cell 20.

[0051] The present application provides an electrical device, including the above-mentioned battery pack, which is used to power the electrical device. The electrical device may include but is not limited to a backup power supply, a motor, an electric car, an electric motorcycle, a power-assisted bicycle, a bicycle, an electric tool, a large household battery, etc.

[0052] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] The above is a detailed introduction to a battery pack and an electrical device 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 solution and its core idea 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 replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: The box body comprises an end plate and a bottom plate connected to the end plate, the end plate and the bottom plate enclose a receiving cavity, the end plate has a mounting groove, the box body has a height direction, and the mounting groove penetrates the surface of the end plate away from the bottom plate along the height direction; A battery cell is disposed in the accommodating cavity; The output pole base comprises a body and a protrusion connected to the body; the protrusion is arranged in the mounting groove, and a side of the body close to the protrusion is connected to the end plate; the output pole base has a limiting groove, and the limiting groove passes through the body and the protrusion along the height direction; A heat-conducting component is disposed in the mounting groove, and the heat-conducting component includes a first heat-conducting portion, which is connected to a side of the protruding portion away from the main body and covers the limiting groove to conduct heat away from the output pole base.

2. The battery pack according to claim 1, characterized in that: The heat-conducting component includes a second heat-conducting portion connected to a side of the first heat-conducting portion away from the body.

3. The battery pack according to claim 1, characterized in that: An orthographic projection of the first heat conducting portion along the height direction is located within the protruding portion.

4. The battery pack according to claim 2, characterized in that: The mounting groove has an inner wall, and the second heat conducting portion is connected to the inner wall.

5. The battery pack according to claim 2, characterized in that: The heat conducting component includes at least one third heat conducting portion, and the third heat conducting portion is connected to a side of the second heat conducting portion away from the body.

6. The battery pack according to claim 5, characterized in that: The mounting groove has an inner wall, and at least one of the third heat conducting parts is connected to the inner wall.

7. The battery pack according to claim 2, characterized in that: The heat conducting component comprises an insulating layer, wherein the insulating layer is located between the first heat conducting portion and the protruding portion and is respectively connected to the first heat conducting portion and the protruding portion; and / or The heat-conducting component comprises a heat-conducting adhesive layer, and the heat-conducting adhesive layer is located between the first heat-conducting part and the second heat-conducting part and is respectively connected to the first heat-conducting part and the second heat-conducting part.

8. The battery pack according to claim 1, characterized in that: The end plate has a positioning groove, the positioning groove penetrates the surface of the end plate away from the bottom plate along the height direction, the positioning groove is connected to the mounting groove, and at least a part of the body is embedded in the positioning groove.

9. The battery pack according to claim 1, characterized in that: The main body includes a first surface and a second surface arranged opposite to each other along the height direction, the second surface is connected to the protrusion, the main body has a receiving groove, the receiving groove has an opening, the opening passes through the first surface, the receiving groove is connected to the limiting groove, and the battery pack includes a first connecting plate and a second connecting plate, at least a portion of the first connecting plate and at least a portion of the second connecting plate are located in the receiving groove.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9, wherein the battery pack is used to supply power to the electrical device.

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