Battery pack and electric device

Abstract

The present application relates to a battery pack and an electric device. The battery pack comprises a housing, a battery module, a heat sink, and a first thermally conductive member. The housing is provided with an accommodating space and a first opening communicated with the accommodating space. The battery module is arranged in the accommodating space, the heat sink is arranged on the first opening and detachably connected to the housing, and the first thermally conductive member abuts between the heat sink and the battery module. The battery pack and the electric device in the present application have good heat dissipation performance, facilitating mounting of the battery module into the housing, and reducing direct contact pressing between the battery module and the housing, thereby effectively protecting the battery module.

Description

Battery pack and electric device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] The present application claims priority to the Chinese patent application No. 202420748369.X filed on April 11, 2024 and entitled “Battery pack and electric device”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a battery pack and an electric device. BACKGROUND

[0004] Automobiles, ships and unmanned aerial vehicles and other power equipment usually use battery packs as power sources. The battery pack usually includes a shell and at least one battery module. The battery module is accommodated in the shell and fixed with the shell. In order to increase voltage or current, the battery module often adopts the form of multiple battery cells connected in series or parallel. However, the battery module with multiple battery cells is difficult to install and fix in the shell, and the multiple battery cells will generate heat during use, which is easy to cause heat concentration. SUMMARY

[0005] The present application aims to provide a battery pack and an electric device, which aims to improve the heat dissipation of the battery module.

[0006] According to a first aspect of the present application, a battery pack is provided, including a shell, a battery module, a heat sink and a first heat-conducting member. The shell has a containing space and a first opening communicating with the containing space. The battery module is arranged in the containing space, the heat sink is arranged at the first opening and detachably connected with the shell, and the first heat-conducting member is abutted between the heat sink and the battery module.

[0007] In the above technical solution, the first heat-conducting member can be arranged at the battery module at the first opening, and the heat sink can be connected with the shell at the first opening. At this time, the first heat-conducting member can be abutted between the heat sink and the battery module, thereby forming a solid heat conduction channel of battery module-first heat-conducting member-heat sink, which facilitates the heat of the battery module to be directly discharged outward through the heat sink. The first heat-conducting member is compressed between the battery module and the shell and / or the heat sink, so that the battery module and the shell and / or the heat sink form an interference fit, thereby improving the installation stability of the heat sink in the shell. The isolation effect of the first heat-conducting member can reduce the direct contact and extrusion of the battery module and the shell, thereby effectively protecting the battery module.

[0008] In one or more / any optional implementation of the above, the battery module includes a plurality of first battery cells, and the battery pack includes a second heat-conducting member connected to at least one of the first battery cells, and the second heat-conducting member is connected to the first heat-conducting member. The heat generated by each of the first battery cells can be conducted to the first heat-conducting member.

[0009] In one or more / any optional implementation of the above, each of the first battery cells includes a battery cell body and an electrode terminal extending from the battery cell body, and the second heat-conducting member is connected to the outside of at least one of the battery cell bodies. The heat of the plurality of surfaces of the battery cell body can be conducted to the second heat-conducting member, thereby increasing the contact area and improving the heat dissipation efficiency.

[0010] In one or more / any optional implementation of the above, the battery pack includes a sealing member arranged around the first opening and abutting between the heat sink and the housing. The sealing performance of the housing can be improved by reducing the entry of external moisture, dust and other impurities into the accommodation space.

[0011] In one or more / any optional implementation of the above, the heat sink is provided with a first fixing hole, and the housing is provided with a second fixing hole. The battery pack includes a first fastener sequentially arranged in the first fixing hole and the second fixing hole, and the first fastener fixes the heat sink and the housing. The heat sink and the housing can be fixed outside the housing, thereby providing more installation space.

[0012] In one or more / any optional implementation of the above, the first heat-conducting member is configured to be arranged in the accommodation space through the first opening. During assembly, the battery module is arranged in the accommodation space first, then the first heat-conducting member is bonded to the battery module through the first opening, and finally the heat sink is connected to the housing at the first opening, which facilitates the assembly of the first heat-conducting member.

[0013] In one or more / any optional implementation of the above, the housing includes a first side wall and a second side wall oppositely arranged along a second direction, and the first opening is arranged in the first side wall, and the second direction is perpendicular to the first direction. Along the second direction, the projection of the first heat-conducting member is located within the projection of the first opening, which not only facilitates the interference fit installation of the battery module with the housing and / or the heat sink, but also improves the heat dissipation efficiency.

[0014] In one or more / any optional implementation of the above, the plurality of first battery cells are arranged along a first direction, and the housing includes a first side wall and a second side wall oppositely arranged along a second direction, and the first opening is arranged in the first side wall, and the second direction is perpendicular to the first direction. Along the second direction, part of the first heat-conducting member is located between the first side wall and the battery cell body. The first heat-conducting member can conduct the heat generated by the battery cell body to the first side wall, and the heat can be directly discharged outward through the first side wall.

[0015] In one or more / any optional embodiments of the above, the first heat-conductive member comprises graphite foam. The graphite foam has better heat conductivity and buffering performance, and can reduce the impact between the battery module and the shell and / or the heat sink, and improve the heat dissipation performance of the battery pack.

[0016] According to a second aspect of the present application, a power consuming device is provided, which comprises the battery pack according to any one of the above embodiments of the first aspect.

[0017] Additional aspects and advantages of the embodiments of the present application will be described in part in the description that follows, and will be shown in part by the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the accompanying drawings, which are not necessarily drawn to scale, and which, if any, are further applicable to the generic principles of the embodiments and will be described in the detailed description of the embodiments. Elements having the same reference number designates similar elements throughout the drawings, unless specifically stated otherwise. The dimensions of the elements in the drawings are not necessarily to scale.

[0019] FIG. 1 shows a structural schematic diagram of a battery pack according to an embodiment of the present application;

[0020] FIG. 2 shows an exploded schematic diagram of a battery pack according to an embodiment of the present application;

[0021] FIG. 3 shows a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

[0022] FIG. 4 shows a structural schematic diagram of a heat sink according to an embodiment of the present application;

[0023] FIG. 5 shows a connection schematic diagram of a first cell and a second heat-conductive member according to an embodiment of the present application;

[0024] FIG. 6 shows a structural schematic diagram of a shell according to an embodiment of the present application;

[0025] FIG. 7 shows a schematic diagram of a heat sink and a shell according to an embodiment of the present application;

[0026] FIG. 8 shows a structural schematic diagram of a heat sink according to an embodiment of the present application;

[0027] FIG. 9 shows a partial structural schematic diagram of a circuit board according to an embodiment of the present application.

[0028] Explanation of reference signs: 1000, battery pack; 10, housing; 11, first opening; 12, accommodation space; 13, bottom wall; 14, peripheral wall; 141, first side wall; 142, second side wall; 143, third side wall; 144, fourth side wall; 15, second opening; 16, second fixing hole; 17, protrusion; 20, battery module; 21, first battery cell; 211, battery cell main body; 212, electrode terminal; 22, busbar; 23, spacer; 30, heat sink; 31, base plate; 32, fin; 33, extension; 34, first fixing hole; 35, first groove; 40, first heat conductive member; 50, second heat conductive member; 60, first buffer member; 70, second buffer member; 80, third buffer member; 90, first fastener; 100, sealing member; 110, battery management system; 111, circuit board; 112, lead wire; 113, terminal; 114, pin; 120, top wall; 121, top heat sink; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0030] In the present application, the phrase “embodiment” means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean that it refers to the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments.

[0031] In the description of the embodiments of the present application, the technical terms “first”, “second” and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of “plurality” is two or more, unless otherwise explicitly specified.

[0032] In the description of the embodiments of the present application, the term “and / or” is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character “ / ” herein generally represents an “or” relationship between the front and rear associated objects.

[0033] The technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0034] Please refer to FIG. 1 and FIG. 2, which show the structure of a battery pack 1000 and the explosion structure of the battery pack 1000 according to an embodiment of the present application. The battery pack 1000 includes a shell 10 and a battery module 20. The shell 10 has a containing space 12, and the battery module 20 is arranged in the containing space 12. For example, the shell 10 includes a bottom wall 13 and a peripheral wall 14 connected to the bottom wall 13. The bottom wall 13 and the peripheral wall 14 jointly define the containing space 12. A first opening 11 can be formed in the peripheral wall 14, and a heat sink 30 is arranged at the first opening 11 of the shell 10. The shell 10 has a second opening 15 communicating with the containing space 12. The second opening 15 is arranged opposite to the bottom wall 13 along a third direction Z. The battery module 20 can be placed in the containing space 12 from the second opening 15, so as to facilitate the installation of the battery module 20 in the shell.

[0035] In some embodiments, the shell 10 can be made of aluminum alloy, stainless steel, carbon fiber composite material, or plastic material. For example, the aluminum alloy has high strength, light weight, and good thermal conductivity, which facilitates the conduction of heat generated by the battery module 20 to the outside.

[0036] Optionally, the size of the second opening 15 is substantially the same as that of the containing space 12 when viewed along the third direction Z. During assembly, the battery module 20 can be directly placed in the containing space 12 of the shell 10 through the second opening 15 and along the peripheral wall 14. The size of the second opening 15 can be adapted to the size of the battery module 20, thereby improving the space utilization of the shell 10.

[0037] In some embodiments, the battery pack 1000 includes the heat sink 30 and a first heat-conducting member 40. The heat sink 30 is arranged at the first opening 11, and the first heat-conducting member 40 abuts between the heat sink 30 and the battery module 20.

[0038] In some embodiments, please refer to FIG. 2 and FIG. 3, the battery module 20 includes a plurality of first battery cells 21 arranged in the containing space 12. The plurality of first battery cells 21 are arranged along a first direction X. The plurality of first battery cells 21 are connected in series or in parallel, for example, through busbars 22 or current collecting plates (not shown in the figure) to connect the plurality of first battery cells 21 in series or in parallel, thereby improving the voltage or current of the battery module 20. The number of the battery module 20 can be one, two, or more. When there are multiple battery modules 20, a separation member 23 can be arranged between two adjacent battery modules 20 after the battery modules 20 are installed in the shell.

[0039] In some embodiments, please refer to FIG. 1, FIG. 2, and FIG. 4, the heat sink 30 is arranged at the first opening 11 of the shell 10, and the heat sink 30 can cover the first opening 11 to reduce the entry of external moisture, dust, and other impurities into the containing space 12.

[0040] In some embodiments, the heat sink 30 comprises a substrate 31 and a plurality of fins 32, the substrate 31 is connected with the shell 10 and covers the first opening 11, the plurality of fins 32 are arranged on the surface of the substrate 31 away from the accommodation space 12, two adjacent fins 32 are arranged at intervals, the heat in the accommodation space 12 can be conducted to the fins 32 through the substrate 31, and the arrangement of the plurality of fins 32 can increase the contact area with the external air and improve the heat dissipation efficiency.

[0041] The heat sink 30 can be in direct contact with the battery module 20 and conduct heat, or can be in indirect contact with the battery module 20 through an intermediate heat-conducting medium. In the embodiments of the present application, the first heat-conducting member 40 can act as an intermediate medium to conduct the heat of the battery module 20 to the heat sink 30.

[0042] Please refer to FIG. 2 and FIG. 3, the first heat-conducting member 40 is abutted between the heat sink 30 and the battery module 20, the first heat-conducting member 40 is partially located between the heat sink 30 and the battery module 20, the first heat-conducting member 40 is abutted with the heat sink 30, and the first heat-conducting member 40 is abutted with the battery module 20. The first heat-conducting member 40 can fill the gap between the heat sink 30 and the battery module 20, increase the contact area, and further improve the heat dissipation efficiency.

[0043] In some embodiments, the first heat-conducting member 40 comprises graphite foam, which can be formed by adding adhesive, flame retardant, etc. in natural graphite or artificial graphite through a foaming process. In other embodiments, the first heat-conducting member 40 includes but is not limited to silicone rubber, polyurethane, metal foam, ceramic foam, etc.

[0044] In some embodiments, the first heat-conducting member 40 is configured to be arranged in the accommodation space 12 through the first opening 11. During assembly, the battery module 20 is first arranged in the accommodation space 12, then the first heat-conducting member 40 is bonded with the battery module 20 through the first opening 11, and then the heat sink 30 is connected with the shell 10 at the first opening 11, which is conducive to the assembly of the first heat-conducting member 40. The steps of assembling the battery module 20 in the accommodation space 12 and the steps of assembling the first heat-conducting member 40 are separated, which can reduce the gap between the battery module 20 and the shell 10, and further reduce the size of the battery pack 1000.

[0045] The first heat-conducting member 40 is abutted between the heat sink 30 and the battery module 20, forming a heat conduction channel of the battery module 20-first heat-conducting member 40-heat sink 30, which facilitates the heat of the battery module 20 to be directly discharged to the outside through the heat sink 30.

[0046] In some embodiments, the first heat-conducting member 40 is in a compressed state, the first heat-conducting member 40 and the battery module 20 are abutted and connected, and the first heat-conducting member 40 and the heat sink 30 are abutted, thereby reducing the heat transfer path.

[0047] In some embodiments, the battery pack 1000 comprises a second heat conducting member 50, please refer to FIG. 3 and FIG. 5, the second heat conducting member 50 is connected to at least one of the first battery cell 21, and the second heat conducting member 50 is connected to the first heat conducting member 40. Each second heat conducting member 50 is connected to at least one of the first battery cell 21, which facilitates the conduction of the heat generated by each first battery cell 21 to the first heat conducting member 40. Optionally, the material of the second heat conducting member 50 can also be similar to that of the first heat conducting member 40, for example, the above-mentioned silicone rubber, polyurethane, metal foam, ceramic foam or graphite foam, etc. Optionally, the second heat conducting member 50 comprises an aluminum sheet.

[0048] In some embodiments, please refer to FIG. 5, each first battery cell 21 comprises a battery cell body 211 and an electrode terminal 212 extending out of the battery cell body 211. The inside of the battery cell body 211 is the place where the electrochemical reaction occurs, and the battery cell body 211 generates heat when the first battery cell 21 is in use. The electrode terminal 212 can lead the positive and negative electrodes of the first battery cell 21 out, and is a channel for the current inside the first battery cell 21 to flow out, which can guide the current inside the first battery cell 21 to the external circuit. The second heat conducting member 50 is connected to the outside of at least one battery cell body 211, and the heat of the multiple surfaces of the battery cell body 211 can be conducted to the second heat conducting member 50, which increases the contact area and improves the heat dissipation efficiency.

[0049] The second heat conducting member 50 is connected to the outside of at least one battery cell body 211, and the second heat conducting member 50 can surround one, two, three or more. When the second heat conducting member 50 surrounds multiple first battery cells 21, the multiple first battery cells 21 can be combined into a whole, which improves the integrity of the battery module 20 and further improves the installation stability of the battery module 20.

[0050] In some embodiments, please refer to FIG. 2, FIG. 3 and FIG. 6, the peripheral wall 14 comprises a first side wall 141, a second side wall 142, a third side wall 143 and a fourth side wall 144, the first side wall 141 and the second side wall 142 are oppositely arranged along the second direction Y, the third side wall 143 and the fourth side wall 144 are connected between the first side wall 141 and the second side wall 142, and the third side wall 143 and the fourth side wall 144 are oppositely arranged along the first direction X, and the first side wall 141, the second side wall 142, the third side wall 143 and the fourth side wall 144 are all connected with the bottom wall 13. Among them, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0051] In some embodiments, the multiple first battery cells 21 are arranged along the first direction X. Along the second direction Y, part of the first heat conducting member 40 is located between the first side wall 141 and the battery cell body 211, which can reduce the influence on the first heat conducting member 40 when the first battery cell 21 expands along the first direction X, and is conducive to fixing the first heat conducting member 40.

[0052] In some embodiments, referring to FIGS. 2 and 3, the battery pack 1000 comprises a first buffer 60 and a second buffer 70. The first buffer 60 can be arranged between the third side wall 143 and the battery module 20, can conduct the heat of the battery module 20 to the third side wall 143, and the third side wall 143 can serve as a buffer for absorbing the expansion of the first battery cell 21 along the thickness direction. The second buffer 70 can be arranged between the battery module 20 and the fourth side wall 144, can conduct the heat of the battery module 20 to the fourth side wall 144, and can absorb the expansion of the first battery cell 21.

[0053] In some embodiments, the battery pack 1000 comprises a third buffer 80, which can be arranged between the bottom wall 13 and the battery module 20. During installation, the third buffer 80 can be first bonded to the bottom wall 13 in the accommodation space 12. When the battery module 20 is placed in the accommodation space 12, the third buffer 80 can also serve as a buffer for bearing the battery module 20, reducing the impact of the battery module 20 on the bottom wall 13, and can conduct the heat of the battery module 20 to the bottom wall 13.

[0054] The first buffer 60, the second buffer 70, and the third buffer 80 described above can all be made of silicone rubber, polyurethane, metal foam, ceramic foam, or graphite foam, which can facilitate the installation of the battery pack 1000 into the shell, facilitate the interference fit between the battery module 20 and the shell 10, and improve the heat dissipation efficiency.

[0055] In addition, the second side wall 142 can also be arranged similarly to the first side wall 141. The second side wall 142 can be provided with a third opening (not labeled in the figure), and the heat sink 30 is arranged at the third opening to form two-sided convection heat dissipation, thereby improving the heat dissipation efficiency of the battery pack 1000.

[0056] In some embodiments, along the second direction Y, the projection of the first heat-conducting member 40 is located within the projection of the first opening 11. Along the second direction Y, the outer dimension of the first heat-conducting member 40 is smaller than the outer dimension of the first opening 11. After the battery module 20 is installed into the shell, the first heat-conducting member 40 can be directly connected to the battery module 20 at the first opening 11, and then the heat sink 30 is connected to the shell 10 and the first heat-conducting member 40 is abutted between the heat sink 30 and the battery module 20. The installation is simple and convenient, not only facilitates the interference fit installation of the battery module 20 with the shell 10 and / or the heat sink 30, but also improves the heat dissipation efficiency.

[0057] In some embodiments, referring to FIGS. 2 and 4, the surface of the substrate 31 of the heat sink 30 facing the accommodation space 12 has an extension 33, the substrate 31 can abut against the outer surface of the shell 10, and the extension 33 is at least partially arranged in the accommodation space 12, so that the extension 33 can press the first heat-conducting member 40 after the heat sink 30 is installed, and the first heat-conducting member 40 is in a compressed state. The first heat-conducting member 40 can press the battery module 20, so as to enhance the fixation of the battery module 20 in the shell 10, and the first heat-conducting member 40 can fully fill the installation gap between the heat sink 30 and the battery module 20, so as to improve the heat dissipation efficiency; at the same time, the first heat-conducting member 40 can act as a buffer member to reduce the direct pressing impact of the heat sink 30 or the shell 10 on the battery module 20; and the side surface of the heat sink 30 and the first heat-conducting member 40 outside the shell 10 is installed, so as to realize the interference fixation of the battery module 20 in the shell 10, thereby facilitating the installation of the battery module 20 in the shell.

[0058] In some embodiments, the heat sink 30 and the shell 10 are detachably connected, which includes but is not limited to screw connection, buckle connection or bolt connection.

[0059] In some embodiments, referring to FIGS. 1 and 7, the heat sink 30 is provided with a first fixing hole 34, the shell 10 is provided with a second fixing hole 16, and the battery pack 1000 includes a first fastener 90, the first fastener 90 is sequentially arranged in the first fixing hole 34 and the second fixing hole 16, and the first fastener 90 fixes the heat sink 30 and the shell 10. The above-mentioned sequential direction is from the outside of the shell 10 to the inside of the shell 10, and the first fastener 90 is operated from the outside of the shell 10, so as to provide more space for assembly.

[0060] Taking the screw connection as an example, the first fastener 90 adopts a screw, and correspondingly, the first fixing hole 34 and the second fixing hole 16 both adopt threaded holes. During installation, first, the first heat-conducting member 40 is attached to the battery module 20 through the first opening 11, and then the heat sink 30 is locked with the shell 10 through the first fastener 90, and the tighter the first fastener 90 is locked with the heat sink 30 and the shell 10, the greater the pressure of the heat sink 30 on the first heat-conducting member 40, and the pressure of the heat sink 30 on the first heat-conducting member 40 can be adjusted according to the locking amount of the first fastener 90, so as to fill the gap between the heat sink 30 and the battery module 20.

[0061] Please refer to FIG. 7, in some embodiments, the battery pack 1000 comprises a sealing member 100, which is arranged around the first opening 11 and abuts between the heat sink 30 and the shell 10. The sealing member 100 can reduce the entry of external moisture, dust and other impurities into the containing space 12 and improve the sealing performance of the shell 10. The sealing member 100 can be made of rubber, sealing gasket or sealing glue, for example, the rubber includes nitrile rubber, silicone rubber, fluororubber, etc., which has good elasticity and sealing performance.

[0062] Optionally, please refer to FIG. 7 and FIG. 8, the heat sink 30 is provided with a first groove 35, which faces the first opening 11, and the outer surface of the shell 10 has a convex portion 17, which is arranged around the first opening 11. The convex portion 17 is matched with the first groove 35, for example, the convex portion 17 can be at least partially accommodated in the first groove 35. The above-mentioned sealing member 100 can be arranged in the first groove 35, when the heat sink 30 is connected with the shell 10, the convex portion 17 can directly enter the first groove 35 and abut with the sealing member 100, which not only can improve the stability of the installation of the sealing member 100, but also can improve the sealing performance of the shell 10.

[0063] In other embodiments, the positions of the first groove 35 and the convex portion 17 can also be interchanged, that is, the first groove 35 is arranged on the outer surface of the shell 10 and surrounds the first opening 11, and the convex portion 17 is arranged on the heat sink 30.

[0064] Please refer to FIG. 2 and FIG. 9, the battery pack 1000 comprises a battery management system 110, which can monitor the voltage, current, temperature and other parameters of the battery in real time, understand the working state of the battery, ensure the balance of the power of each battery cell in the battery pack 1000, prolong the service life of the battery, and optimize the discharging process according to the state of the battery and the load demand, and improve the energy utilization efficiency.

[0065] The battery management system 110 is arranged in the containing space 12, and comprises a circuit board 111, which can be electrically connected with the battery module 20 through a wire 112. Optionally, the circuit board 111 is provided with a terminal 113, and one end of the wire 112 can be electrically connected with the terminal 113 through mechanical pressure connection or welding, which has low contact resistance, strong overcurrent capacity and small heat generation. The terminal 113 can be arranged on the circuit board 111 by means of patch, and in other embodiments, the circuit board 111 can be provided with a pin hole (not labeled in the figure), and the terminal 113 has a pin 114 which is inserted into the pin hole, which can improve the stability of the electrical connection of the terminal 113.

[0066] Please refer to FIG. 1 and FIG. 2, in some embodiments, the battery pack 1000 comprises a top wall 120, the top wall 120 is connected with the shell 10, and the size of the top wall 120 is equal to or greater than the size of the second opening 15, the top wall 120 covers the first opening 11 to seal the containing space 12, so as to reduce the external water vapor entering the containing space 12. Among them, the battery management system 110 can be arranged between the top wall 120 and the battery module 20, the top wall 120 can be provided with a heat dissipation hole (not marked in the figure) and a top heat sink 121, the heat dissipation hole is communicated with the containing space 12, the top heat sink 121 can seal the heat dissipation hole, and part of the heat in the containing space 12 can be conducted to the outside of the shell 10.

[0067] In the second aspect, the application further provides a power utilization device comprising the battery pack 1000 described above. Therefore, the power utilization device has all the features and characteristics of the battery pack 1000 described above, which will not be repeated here. The power utilization device can be implemented in various specific forms, such as unmanned aerial vehicles, electric vehicles, electric cleaning tools, energy storage products, electric vehicles, electric bicycles, electric navigation tools and other electronic products. In some scenarios, the power utilization device includes but is not limited to: backup power supply, electrode, automobile, motorcycle, power-assisted bicycle, bicycle electric tool, household large storage battery and lithium ion capacitor, etc.

[0068] The above description is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A battery pack characterized by comprising: The battery pack comprises: a housing having a receiving space and a first opening communicating with the receiving space; a battery module disposed in the receiving space; a heat sink disposed in the first opening and detachably connected with the housing; a first heat-conductive member abutting between the heat sink and the battery module.

2. The battery pack according to claim 1, characterized by The battery module comprises a plurality of first battery cells, and the battery pack comprises a second heat-conductive member connected to at least one of the first battery cells, the second heat-conductive member being connected with the first heat-conductive member.

3. The battery pack of claim 2, wherein, Each of the first battery cells comprises a battery cell body and an electrode terminal extending from the battery cell body, and the second heat-conductive member is wrapped around the outside of at least one of the battery cell bodies.

4. The battery pack of claim 1, wherein, The battery pack comprises a sealing member disposed around the first opening, the sealing member abutting between the heat sink and the housing.

5. The battery pack of claim 1, wherein, The heat sink is provided with a first fixing hole, and the housing is provided with a second fixing hole; The battery pack comprises a first fastener, the first fastener being sequentially disposed in the first fixing hole and the second fixing hole, and the first fastener fixing the heat sink and the housing.

6. The battery pack according to any one of claims 1 to 5, characterized by, The first heat-conductive member is configured to be disposed in the receiving space through the first opening.

7. The battery pack of claim 6, wherein, The housing comprises a first side wall and a second side wall oppositely arranged along a second direction, and the first opening is disposed in the first side wall; Along the second direction, a projection of the first heat-conductive member is located within a projection of the first opening.

8. The battery pack of claim 6, wherein, The plurality of first battery cells are arranged along a first direction, the housing comprises a first side wall and a second side wall oppositely arranged along a second direction, the first opening is disposed in the first side wall, and the second direction is perpendicular to the first direction; Along the second direction, a part of the first heat-conductive member is located between the first side wall and the battery cell body.

9. The battery pack of claim 6, wherein, The first heat-conductive member comprises graphite foam.

10. An electric device, characterized by The battery pack as claimed in any one of claims 1 to 9.

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