Heat dissipation assembly, battery pack and electric device

Abstract

An electric device. The electric device comprises a battery pack; the battery pack comprises a heat dissipation assembly; the heat dissipation assembly comprises an outer package, a phase change medium and supporting members; the outer package is suitable for being attached to two adjacent battery cells in the battery pack; the supporting members are arranged in the outer package and define channels together with the outer package; the phase change medium is located in the channels; the outer package is provided with outlets; and the outlets are communicated with the channels.

Description

Heat dissipation components, battery packs, and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 28, 2023, with application number 202322669212.6 and titled “Heat dissipation assembly, battery pack and electrical equipment,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a heat dissipation component, a battery pack, and an electrical device. Background Art

[0004] Due to its excellent performance, batteries have shown good application prospects in new energy vehicles, energy storage base stations and other fields. In recent years, as the requirements for the range of electric vehicles have become increasingly higher, as well as the corresponding charging speed and duration requirements have also become increasingly higher, in order to ensure the safety of battery packs during fast charging, phase change materials are currently mainly used to solve the problem of excessive temperature during fast charging. The core point is to use the latent heat of phase change to take away the large amount of heat generated during the fast charging process of the battery cell.

[0005] In related technologies, the material changes from liquid phase to gas phase after phase change, and its volume increases several times. The generation of a large amount of gas causes the pressure of the internal flow of the phase change material to increase dramatically. The large internal pressure will cause the phase change material to quickly break through the package and lose a large amount, affecting the heat dissipation effect of the battery.

[0006] Public content

[0007] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a heat dissipation component that can improve the utilization rate of phase change medium.

[0008] Another object of the present application is to provide a battery pack.

[0009] Another object of the present application is to provide an electrical device.

[0010] According to an embodiment of the present application, the heat dissipation assembly includes: an outer packaging member, which is suitable for being attached to two adjacent battery cells in a battery pack; a phase change medium; and a support member, which is arranged in the outer packaging member and defines a channel together with the outer packaging member, the phase change medium is located in the channel, and the outer packaging member is provided with an outlet, which is connected to the channel.

[0011] Therefore, by arranging a support member and an outer packaging member in the heat dissipation assembly to jointly define a plurality of interconnected channels, when thermal runaway occurs in the battery cell, the phase change medium can flow along the channel direction, thereby increasing the flow resistance of the phase change medium in the channel, extending the heat absorption time of the phase change medium in the channel, and preventing the phase change medium from being lost quickly and in large quantities after absorbing the heat generated by the battery cell, thereby improving the utilization rate of the phase change medium, which is beneficial to improving the heat dissipation effect of the battery pack and ensuring the working reliability of the battery pack.

[0012] In some examples of the present application, the channel includes a plurality of sub-channels, and the channel outlet of one sub-channel of two adjacent sub-channels is connected to the channel inlet of the other sub-channel.

[0013] In some examples of the present application, one of the two adjacent sub-channels is arranged around the periphery of the other.

[0014] In some examples of the present application, there are multiple support members, each of which is a frame-shaped member, and the multiple support members are arranged in a surrounding manner in sequence.

[0015] In some examples of the present application, the two adjacent support members are respectively a first support member and a second support member, the first support member is provided with a first notch, and the second support member is provided with a second notch, the first notch is located on one side of the first support member along the first direction, the second notch is located on the side of the second support member away from the first notch along the first direction, the notch of the support member of the outermost ring is located on the side of the support member away from the outlet along the first direction, and the first direction is the length direction or width direction of the heat dissipation assembly.

[0016] In some examples of the present application, the support member is in a continuous spiral shape.

[0017] In some examples of the present application, the support member includes a plurality of plate segments spaced apart from each other in a first direction, and the plurality of plate segments are extended in a second direction, and two adjacent plate segments are respectively a first plate segment and a second plate segment, and the orthographic projection of the first plate segment in the first direction partially overlaps or does not overlap with the orthographic projection of the second plate segment in the first direction, wherein the first direction is the length direction of the heat dissipation component, and the second direction is the width direction of the heat dissipation component, or, the first direction is the width direction of the heat dissipation component, and the second direction is the length direction of the heat dissipation component.

[0018] In some examples of the present application, the two adjacent sub-channels are respectively the first sub-channel and the second sub-channel, the first sub-channel has multiple channel outlets, the second sub-channel has multiple channel inlets, the multiple channel outlets of the first sub-channel and the multiple channel inlets of the second sub-channel correspond one to one and are interconnected.

[0019] In some examples of the present application, the support member includes: multiple main support members, the main support member includes a first main body portion and a first extension portion, the first extension portion is two and is respectively arranged at both ends of the first main body portion along its extension direction to form an open opening; wherein, the two adjacent main support members are respectively a third support member and a fourth support member, the fourth support member is arranged around the outside of the third support member, and the open opening of the third support member is arranged opposite to the first main body portion of the fourth support member.

[0020] In some examples of the present application, the support member further includes: a secondary support member, which is located at the open mouth of the innermost ring of the main support member to divide the open mouth into multiple sub-open mouths, and the sub-open mouths are channel outlets of the sub-channels.

[0021] In some examples of the present application, the outer packaging component includes a first packaging layer and a second packaging layer, the first packaging layer and the second packaging layer are respectively arranged on both sides of the phase change medium along a third direction, the first packaging layer and the second packaging layer are respectively used to fit with two adjacent battery cells in the battery pack, the support component is respectively connected to the first packaging layer and the second packaging layer on both sides along the third direction, the support component defines the channel with the first packaging layer and the second packaging layer respectively, and the third direction is the thickness direction of the heat dissipation component.

[0022] In some examples of the present application, a circumferential edge of the outer package is at least partially formed with a packaging area, and the packaging area is at least partially thinned to form the outlet.

[0023] In some examples of the present application, an exhaust channel is provided between two adjacent battery cells, the outlet is located on at least one side of the outer package along the first direction, and the exhaust channel is located outside the side of the heat dissipation component corresponding to the outlet and is connected to the outlet.

[0024] In some examples of the present application, the length of the heat dissipation assembly in the first direction is smaller than the length of the battery cell in the first direction, the length of the exhaust channel in the first direction is L1, and the length of the battery cell in the first direction is L2. L1 and L2 satisfy the relationship: 1 / 100L2≤L1≤3 / 100L2, 1mm≤L1≤3mm.

[0025] In some examples of the present application, L1 satisfies the relationship: 1 mm ≤ L1 ≤ 3 mm.

[0026] The battery pack according to the present application includes: the heat dissipation assembly described above; and battery cells, wherein the battery cells are extended in the second direction and are multiple, and the multiple battery cells are spaced apart in the third direction, and the heat dissipation assembly is arranged between two adjacent battery cells along the third direction.

[0027] In some examples of the present application, the battery pack includes a plurality of the heat dissipation components, and the plurality of the heat dissipation components between two adjacent battery cells along the third direction are arranged in the second direction; and / or, the plurality of the heat dissipation components between two adjacent battery cells along the third direction are arranged in the first direction, wherein the first direction and the second direction are perpendicular to each other.

[0028] In some examples of the present application, there is at least one battery core between two adjacent heat dissipation components.

[0029] The electrical equipment according to the present application includes the battery pack described above.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] FIG1 is a partial exploded view of a battery pack according to an embodiment of the present application;

[0033] FIG2 is a partial schematic diagram of a battery pack according to an embodiment of the present application;

[0034] FIG3 is an exploded view of a heat dissipation assembly according to an embodiment of the present application;

[0035] FIG4 is an exploded view of a heat dissipation assembly according to some other embodiments of the present application;

[0036] FIG5 is an exploded view of a heat dissipation assembly according to yet other embodiments of the present application;

[0037] FIG6 is an exploded view of a heat dissipation assembly according to yet other embodiments of the present application;

[0038] FIG7 is a partial schematic diagram of a battery pack according to an embodiment of the present application;

[0039] FIG8 is a schematic block diagram of an electric device according to an embodiment of the present application.

[0040] : Reference numerals: Electric device 1000, battery pack 100, battery cell 10, heat dissipation assembly 20, outer packaging member 21, outlet 211, first packaging layer 212, second packaging layer 213, packaging area 214, phase change medium 22, heat dissipation area 222, support member 23, first notch 2311, second notch 2312, first support member 232, second support member 233, plate segment 235, first plate segment 2351, second plate segment 2352, third plate segment 2353, fourth plate segment 2354, main support member 236, first main body portion 2361, first extension portion 2362, third support member 2363, fourth support member 2364, auxiliary support member 237, second main body portion 2371, second extension portion 2372, The channel 24 , the sub-channel 241 , the first sub-channel 2411 , the second sub-channel 2412 , the third sub-channel 2413 , the fourth sub-channel 2414 , the channel outlet 242 , the channel inlet 243 , the open port 25 , the sub-open port 251 , and the exhaust channel 30 . DETAILED DESCRIPTION

[0041] The following describes in detail embodiments of the present application, and the embodiments described with reference to the accompanying drawings are exemplary.

[0042] The following describes a heat dissipation assembly 20 of a battery pack 100 according to an embodiment of the present application with reference to Figures 1-7. This heat dissipation assembly 20 of the battery pack 100 can be applied to the battery pack 100, which can be used in an electrical device. In this embodiment of the present application, the first direction is one of the length and width of the heat dissipation assembly 20, the second direction is the other of the length and width of the heat dissipation assembly 20, the first direction is perpendicular to the second direction, and the third direction is the thickness direction of the heat dissipation assembly 20.

[0043] As shown in Figures 1 to 7, the heat dissipation assembly 20 of the battery pack 100 according to the present application may mainly include: an outer packaging member 21, a phase change medium 22 and a support member 23, wherein the outer packaging member 21 is suitable for being bonded to two adjacent battery cells 10 in the battery pack 100, so as to set the heat dissipation assembly 20 between two adjacent battery cells 10 in the battery pack 100, and can absorb and conduct the heat generated by the battery cells 10 by being bonded to the battery cells 10, which can help the battery to dissipate heat quickly and ensure the working reliability of the battery cells 10 in the battery pack 100.

[0044] Furthermore, in an embodiment of the present application, the phase change medium 22 is a phase change material, which can change from a liquid phase to a gas phase after absorbing the heat generated by the battery cell 10. Since the heat generated by the battery cell 10 inside the battery pack 100 during fast charging has local differences, the phase change medium 22 in the heat dissipation component 20 exists in a state where gas and liquid phases coexist. Part of the phase change medium 22 absorbs too much heat and is converted into gas. The volume of this part of the phase change medium 22 increases, which can promote the liquid phase of the phase change medium 22 to flow in the heat dissipation component 20.

[0045] Furthermore, the support member 23 is disposed within the outer package 21 and together with the outer package 21 defines a channel 24. The phase change medium 22 is located within the channel 24. The outer package 21 is provided with an outlet 211, which communicates with the channel 24. Specifically, disposing the support member 23 within the outer package 21 can, on the one hand, provide support for the outer package 21, thereby preventing the outer package 21 from collapsing due to uncontrolled thermal expansion of the battery cells 10 and improving the structural strength of the heat dissipation assembly 20. On the other hand, the support member 23 and the outer package 21 can jointly define the channel 24 in the heat dissipation assembly 20.

[0046] With such a configuration, when the phase change medium 22 is located in the channel 24, the heat-absorbing and expanding phase change medium 22 can flow in the direction of the channel 24, thereby increasing the flow resistance of the phase change medium 22 in the heat dissipation component 20, and preventing the vaporized phase change medium 22 from directly pushing the liquid phase change medium 22 out of the heat dissipation component 20, causing the phase change medium 22 that has not absorbed heat in time to be lost in large quantities and quickly, thereby extending the time that more liquid phase change medium 22 is located in the channel 24, increasing the heat absorption of the phase change medium 22, thereby improving the utilization rate of the phase change medium 22, and improving the heat dissipation effect of the heat dissipation component 20 on the battery pack 100, thereby improving the working reliability of the battery cell 10 in the battery pack 100.

[0047] Furthermore, an outlet 211 is provided on the outer packaging 21, and the outlet 211 is connected to the channel 24. With such a configuration, when the gasification volume of the phase change medium 22 is too large, it can flow toward the outlet 211 along the direction of the channel 24. When the gas pressure in the outer packaging 21 is large enough, the outlet 211 can be broken, so that the phase change medium 22 can flow out of the outlet 211 quickly and in large quantities, thereby realizing rapid heat dissipation of the battery pack 100.

[0048] In an embodiment of the present application, the outer package 21 is bonded to the large surface of the battery cell 10 (i.e., the surface with the largest area among the multiple surfaces of the battery cell 10). The large surface of the battery cell 10 is located on two opposite sides of the battery cell 10 in the third direction. The area of ​​the two opposite sides of the battery cell 10 in the third direction is the larger area of ​​all the surfaces of the battery cell 10. Bonding the large surface of the battery cell 10 to the outer package 21 can improve the heat transfer efficiency between the battery cell 10 and the heat dissipation component 20. In this way, when the battery cell 10 generates heat, the heat can be quickly transferred to the heat dissipation component 20 through the large surface of the battery cell 10, which is beneficial to improving the heat dissipation efficiency of the heat dissipation component 20, and further improving the heat dissipation effect of the battery pack 100, which is beneficial to improving the working reliability of the battery pack 100. In other embodiments of the present application, the outer package 21 is bonded to other surfaces of the battery cell 10, and the specific design situation can be designed according to actual requirements.

[0049] Therefore, by arranging a support member 23 and an outer packaging member 21 in the heat dissipation assembly 20 to jointly define a plurality of interconnected channels 24, when thermal runaway occurs in the battery cell 10, the phase change medium 22 can flow along the direction of the channel 24, thereby increasing the flow resistance of the phase change medium 22 in the channel 24, extending the heat absorption time of the phase change medium 22 in the channel 24, and preventing the phase change medium 22 from being lost quickly and in large quantities after absorbing the heat generated by the battery cell 10, thereby improving the utilization rate of the phase change medium 22, which is beneficial to improving the heat dissipation reliability of the battery pack 100.

[0050] As shown in Figures 2-7 , the channel 24 includes multiple sub-channels 241. The channel outlet 242 of one of two adjacent sub-channels 241 is interconnected with the channel inlet 243 of the other. Specifically, the multiple sub-channels 241 provided in the heat dissipation assembly 20 are interconnected, allowing the phase-change medium 22 to flow smoothly among the multiple sub-channels 241. After the phase-change medium 22 vaporizes and increases in volume, it can push the remaining liquid phase of the phase-change medium 22 to flow smoothly within the channel 24. This prevents excessive pressure within the heat dissipation assembly 20 from causing the phase-change medium 22 to burst out of the outer package 21 and fail within a certain period of time. The channel outlet 242 of one of two adjacent sub-channels 241 is interconnected with the channel inlet 243 of the other. As a result, within the two adjacent sub-channels 241, the phase-change medium 22 can flow from the channel outlet 242 of one sub-channel 241 directly to the channel inlet 243 of the other sub-channel 241, achieving free flow of the phase-change medium 22 within the multiple sub-channels 241.

[0051] As shown in Figures 2, 3, 4 and 6, one of the two adjacent sub-channels 241 is arranged around the periphery of the other. In this way, the channel 24 composed of multiple sub-channels 241 can be arranged around the outer package 21. This can increase the distance that the phase change medium 22 flows in the channel 24, and increase the flow resistance encountered by the phase change medium 22 in the channel 24, which is beneficial to slowing down the flow speed of the phase change medium 22 and increasing the time for the phase change medium 22 to absorb the heat generated by the battery cell 10, so that the phase change medium 22 absorbs more heat in the heat dissipation component 20, thereby improving the utilization rate of the phase change medium 22 and improving the heat dissipation efficiency of the battery pack 100.

[0052] As shown in Figures 2, 3, 4, and 6, there are multiple support members 23, each of which is a frame-shaped member. The multiple support members 23 are sequentially arranged around the outer package 21. Specifically, the support members 23 are frame-shaped, allowing the multiple support members 23 to be sequentially arranged around the outer package 21 and form a plurality of interconnected sub-channels 241, thereby ensuring the structural reliability of the channel 24. In the embodiment of the present application, the material of the support members 23 includes, but is not limited to, plastic.

[0053] As shown in Figures 3 to 6, the support member 23 divides the phase change medium 22 into a plurality of interconnected heat dissipation regions 222, and the plurality of heat dissipation regions 222 correspond to the plurality of channels 24. Specifically, the support member 23 can divide the phase change medium 22 into a plurality of interconnected heat dissipation regions 222, and the plurality of heat dissipation regions 222 correspond to the plurality of channels 24. This not only allows the phase change medium 22 in the plurality of heat dissipation regions 222 to flow smoothly in the channels 24, ensuring the flow guidance reliability of the channels 24 for the phase change medium 22, but also allows the phase change medium 22 to cover the heat dissipation regions 222, increasing the contact area between the phase change medium 22 and the outer package 21, and increasing the amount of phase change medium 22 in the heat dissipation assembly 20. In this way, when the battery cell 10 generates heat, the phase change medium 22 can quickly absorb the heat from the outer package 21, thereby increasing the heat absorption rate and heat absorption capacity of the heat dissipation assembly 20, and improving the heat dissipation effect of the heat dissipation assembly 20 on the battery cell 10.

[0054] In the embodiment of the present application, the outermost ring heat dissipation area 222 accounts for 10% to 20% of the total area of ​​the heat dissipation area 222 in the heat dissipation assembly 20 . If the outermost ring heat dissipation area 222 is set to account for less than 10% of the total area of ​​the heat dissipation area 222 in the heat dissipation assembly 20, the outermost ring support 23 is too close to the edge of the outer package 21, resulting in increased difficulty in sealing the edge of the outer package 21; if the outermost ring heat dissipation area 222 is set to account for more than 20% of the total area of ​​the heat dissipation area 222 in the heat dissipation assembly 20, the amount of phase change medium 22 corresponding to the outermost ring heat dissipation area 222 accounts for a higher amount of the total phase change medium 22 in the heat dissipation assembly 20, because the flow path of the phase change medium 22 in the outermost ring heat dissipation area 222 is the shortest and the flow resistance is the smallest. After the phase change medium 22 undergoes phase change, most of the phase change medium 22 will flow out of the heat dissipation assembly 20, affecting the heat dissipation effect of the heat dissipation assembly 20 on the battery cell 10. Therefore, setting the outermost ring heat dissipation area 222 to account for between 10% and 20% of the total area of ​​the heat dissipation area 222 in the heat dissipation assembly 20 can not only facilitate the production of the heat dissipation assembly 20, but also ensure the heat dissipation effect of the heat dissipation assembly 20 on the battery cell 10.

[0055] According to one embodiment of the present application, in combination with Figures 2 and 3, two adjacent support members 23 are respectively a first support member 232 and a second support member 233, the first support member 232 is provided with a first notch 2311, and the second support member 233 is provided with a second notch 2312, the first notch 2311 is located on one side of the first support member 232 along the first direction, the second notch 2312 is located on the side of the second support member 233 away from the first notch 2311 along the first direction, and the notch of the outermost ring support member 23 is located on the side of the support member 23 away from the outlet 211 along the first direction.

[0056] Specifically, the first notch 2311 on the first support member 232 and the second notch 2312 on the second support member 233 are arranged to be spaced apart from each other in the first direction. This can extend the distance the phase-change medium 22 flows from the first notch 2311 to the second notch 2312, thereby increasing the flow distance of the phase-change medium 22 in the channel 24, thereby increasing the flow time of the phase-change medium 22 in the heat dissipation assembly 20, allowing the phase-change medium 22 to absorb more heat generated by the battery cells 10, and improving the utilization rate of the phase-change medium 22 in the heat dissipation assembly 20. In the embodiment of the present application, the first notch 2311 and the second notch 2312 are arranged to be spaced apart from each other in the first direction, and can also be arranged to be spaced apart from each other in the second direction. This can further increase the resistance encountered by the phase-change medium 22 in the heat dissipation assembly 20 and extend the flow time of the phase-change medium 22 in the heat dissipation assembly 20.

[0057] In addition, the notch of the outermost ring support member 23 is located on the side of the support member 23 away from the outlet 211 along the first direction, so that after the phase change medium 22 flows into the sub-channel 241 of the outermost ring, the distance the phase change medium 22 flows from the notch of the outermost ring support member 23 to the outlet 211 is extended. This can further increase the resistance encountered by the phase change medium 22 in the heat dissipation component 20, extend the flow path and duration of the phase change medium 22 in the heat dissipation component 20, and not only improve the heat absorption of the phase change medium 22 in the heat dissipation component 20, but also improve the space utilization of the heat dissipation component 20.

[0058] According to another embodiment of the present application, as shown in FIG4 , the support member 23 is in a continuous spiral shape. In the embodiment of the present application, the support member 23 includes a plurality of third plate segments 2353 and a plurality of fourth plate segments 2354. The third plate segments 2353 and the fourth plate segments 2354 are alternately connected along the spiral direction of the support member 23. The plurality of third plate segments 2353 extend in the first direction and are spaced apart along the second direction. The plurality of fourth plate segments 2354 extend in the second direction and are spaced apart in the first direction. At least some of the fourth plate segments 2354 are spaced apart at one end of the plurality of third plate segments 2353 in the first direction, and the other portion of the fourth plate segments 2354 are spaced apart at one end of the plurality of third plate segments 2353 in the first direction. At the other end of the first direction of multiple third plate segments 2353, two adjacent third plate segments 2353 and the outer packaging member 21 jointly define a third sub-channel 2413, and two adjacent fourth plate segments 2354 and the outer packaging member 21 jointly define a fourth sub-channel 2414. The third sub-channel 2413 and the fourth sub-channel 2414 are alternately arranged along the spiral direction of the support member 23 and are connected in sequence. In this way, multiple third sub-channels 2413 and multiple fourth sub-channels 2414 are connected in sequence to form a spiral channel 24 in the heat dissipation assembly 20.

[0059] Furthermore, allowing the phase change medium 22 to flow in the spiral channel 24 can increase the flow resistance of the phase change medium 22 in the heat dissipation component 20, slow down the flow speed of the heat dissipation component 20, and extend the flow time of the unvaporized liquid phase change medium 22 in the outer package 21, so that the unvaporized liquid phase change medium 22 continues to absorb the heat generated by the battery cell 10, thereby increasing the heat absorption rate of the phase change medium 22, and improving the heat dissipation effect of the heat dissipation component 20 on the battery cell 10.

[0060] According to other embodiments of the present application, as shown in FIG5 , the support member 23 includes a plurality of plate segments 235 spaced apart from one another in a first direction. The plurality of plate segments 235 extend in a second direction, thereby defining the length of the channel 24 in the second direction and thereby increasing the flow distance of the phase change medium 22 within the outer package 21. Adjacent plate segments 235 are a first plate segment 2351 and a second plate segment 2352, respectively. The first plate segment 2351 and the second plate segment 2352 are spaced apart from one another in the first direction. Together with the outer package 21, the first plate segment 2351 and the second plate segment 2352 define sub-channels 241. The plurality of sub-channels 241 extend along the second direction and are spaced apart from one another in the first direction. Alternatively, the first direction is the length direction of the heat dissipation assembly 20, and the second direction is the width direction of the heat dissipation assembly 20.

[0061] In some embodiments of the present application, the orthographic projection of the first plate segment 2351 in the first direction partially overlaps with the orthographic projection of the second plate segment 2352 in the first direction. This arrangement allows the channel inlets 243 and channel outlets 242 of adjacent sub-channels 241 to communicate with each other, and the channel inlet 243 and channel outlet 242 of each sub-channel 241 are spaced apart in the second direction. This not only allows the phase-change medium 22 to flow freely within the channel 24, but also extends the flow path of the phase-change medium 22 within the heat dissipation assembly 20, increases the flow resistance of the phase-change medium 22, and improves the utilization rate of the phase-change medium 22.

[0062] In some other embodiments of the present application, the orthographic projection of the first plate segment 2351 in the first direction does not overlap with the orthographic projection of the second plate segment 2352 in the first direction. Such an arrangement can, on the one hand, enable the channel inlet 243 and the channel outlet 242 of adjacent sub-channels 241 to be connected, ensuring that the phase change medium 22 flows smoothly in the channel 24; on the other hand, the channel inlet 243 and the channel outlet 242 of adjacent sub-channels 241 can be spaced apart in the first direction, and the channel inlet 243 and the channel outlet 242 are both located in the middle position of the outer package 21 in the second direction. This not only shortens the length of the plate segment 235, but also prevents the phase change medium 22 from flowing out of the channel outlet 242 of one sub-channel 241 and directly flowing to the channel inlet 243 of the adjacent sub-channel 241, thereby increasing the flow resistance of the phase change medium 22 in the channel 24, which is beneficial to improving the utilization rate of the phase change medium 22.

[0063] According to yet other embodiments of the present application, as shown in conjunction with FIG6 , two adjacent sub-channels 241 are respectively a first sub-channel 2411 and a second sub-channel 2412. The first sub-channel 2411 has a plurality of channel outlets 242, and the second sub-channel 2412 has a plurality of channel inlets 243. Specifically, the first sub-channel 2411 has a plurality of channel outlets 242, allowing the phase-change medium 22 to flow out of the first sub-channel 2411 from multiple directions, and the second sub-channel 2412 has a plurality of channel inlets 243, allowing the phase-change medium 22 to flow into the second sub-channel 2412 from multiple directions. The multiple channel outlets 242 of the first sub-channel 2411 and the multiple channel inlets 243 of the second sub-channel 2412 correspond to each other one by one and are interconnected, so that the phase change medium 22 can flow in multiple directions at the same time. In this way, the phase change medium 22 can absorb heat and quickly transfer it to other positions of the heat dissipation component 20, making the overall temperature of the phase change medium 22 in the heat dissipation component 20 more uniform, and can slow down the rate of increase in volume caused by the vaporization of the phase change medium 22, thereby preventing the local phase change medium 22 in the heat dissipation component 20 from vaporizing and accelerating the flow speed of the phase change medium 22 in the channel 24.

[0064] Furthermore, as shown in FIG6 , the support member 23 includes a plurality of main support members 236. The main support member 236 includes a first main portion 2361 and a first extension portion 2362. Two first extension portions 2362 are provided, one at each end of the first main portion 2361 along its extension direction, to form an open opening 25. Specifically, the first main portion 2361 of the main support member 236 is provided to extend in the first direction, thereby guiding the phase-change medium 22 along the first direction and increasing the flow distance of the phase-change medium 22 in the heat dissipation assembly 20. The two first extension portions 2362 are provided at each end of the first main portion 2361 along the first direction to form an open opening 25, which serves as the channel outlet 242 of the first sub-channel 2411 and the channel inlet 243 of the second sub-channel 2412, ensuring smooth flow of the phase-change medium 22 within the channel 24.

[0065] Furthermore, two adjacent main support members 236 are respectively a third support member 2363 and a fourth support member 2364. The fourth support member 2364 is disposed around the outside of the third support member 2363. This allows a sub-channel 241 to be formed between the fourth support member 2364 and the third support member 2363, thereby increasing the flow path of the phase-change medium 22. The opening 25 of the third support member 2363 is disposed opposite the first main portion 2361 of the fourth support member 2364. As a result, when the phase-change medium 22 flows out of the opening 25 of the third support member 2363, it flows toward the first main portion 2361 of the fourth support member 2364 due to inertia. This increases the flow resistance of the phase-change medium 22 within the channel 24, thereby improving the utilization rate of the phase-change medium 22.

[0066] Furthermore, in combination with what is shown in FIG6 , the support member 23 also includes a secondary support member 237, and the secondary support member 237 includes a second main body portion 2371 and a second extension portion 2372. The second main body portion 2371 is arranged at the open opening 25 of the innermost ring main support member 236 and extends in the first direction. This not only guides the phase change medium 22 near the innermost ring main support member 236, but also further increases the flow resistance of the phase change medium 22 in the heat dissipation assembly 20, so as to slow down the flow rate at which the phase change medium 22 is fully utilized.

[0067] Furthermore, the auxiliary support member 237 can divide the open opening 25 of the innermost ring main support member 236 into multiple sub-open openings 251 to serve as the channel outlet 242 of the sub-channel 241, so that the phase change medium 22 between the auxiliary support member 237 and the innermost ring main support member 236 can flow out from the multiple sub-open openings 251 to realize heat transfer in the heat dissipation component 20.

[0068] Furthermore, there is one second extension portion 2372, and it is arranged in the middle of the second main body portion 2371 along the first direction, so that the phase change medium 22 between the innermost ring main support member 236 and the second main body portion 2371 can be divided into two parts. When the phase change medium 22 absorbs heat and expands, it can not only increase the flow resistance of the phase change medium 22 between the innermost ring main support member 236 and the second main body portion 2371, but also enable the two parts of the phase change medium 22 to flow relative to each other along the first direction. In this way, the heat balance at various locations inside the heat dissipation component 20 can be improved, the phase change time of the phase change medium 22 can be delayed, and the flow rate of the phase change medium 22 in the channel 24 can be slowed down, so that the non-vaporized liquid phase change medium 22 can absorb more heat, thereby improving the utilization rate of the phase change medium 22.

[0069] As shown in Figures 3-6 , the outer package 21 includes a first packaging layer 212 and a second packaging layer 213. The first packaging layer 212 and the second packaging layer 213 are respectively arranged on both sides of the phase change medium 22 in the third direction. The first packaging layer 212 and the second packaging layer 213 are respectively used to adhere to two adjacent battery cells 10 in the battery pack 100. Specifically, the outer package 21 is configured to be composed of the first packaging layer 212 and the second packaging layer 213, which can facilitate the placement of the phase change medium 22 within the outer package 21, improving the convenience of producing the heat dissipation assembly 20. The first packaging layer 212 and the second packaging layer 213 are respectively arranged on both sides of the phase change medium 22 in the third direction, which can prevent the phase change medium 22 from flowing out of the heat dissipation assembly 20 on both sides in the third direction, thereby ensuring the reliability of the placement of the phase change medium 22 in the heat dissipation assembly 20.

[0070] Furthermore, the heat dissipation component 20 is arranged between two adjacent battery cells 10 in the battery pack 100, and the first packaging layer 212 and the second packaging layer 213 are respectively used to fit with the two battery cells 10. The heat generated by the two adjacent battery cells 10 can be transferred to the phase change medium 22 in the same outer packaging component 21 through the first packaging layer 212 and the second packaging layer 213. This not only reduces the volume of the phase change medium 22, but also helps to increase the heat absorption of the phase change medium 22, thereby improving the utilization rate of the phase change medium 22.

[0071] Furthermore, the two sides of the support member 23 in the third direction are connected to the first encapsulation layer 212 and the second encapsulation layer 213, respectively. This allows the support member 23 to simultaneously support the first encapsulation layer 212 and the second encapsulation layer 213. Furthermore, the channel 24 defined by the support member 23 and the first encapsulation layer 212 and the second encapsulation layer 213 ensures reliable flow of the phase change medium 22 within the channel 24. The third direction is the thickness direction of the heat dissipation assembly 20.

[0072] In an embodiment of the present application, after the phase change medium 22 is arranged between the first encapsulation layer 212 and the second encapsulation layer 213, the circumferential edges of the first encapsulation layer 212 and the second encapsulation layer 213 are hot pressed, and the first encapsulation layer 212 and the support member 23 are hot pressed on both sides along the third direction, and the second encapsulation layer 213 and the support member 23 are hot pressed on both sides along the third direction, so that the circumferential edges of the first encapsulation layer 212 and the second encapsulation layer 213 are connected, and the first encapsulation layer 212 and the second encapsulation layer 213 are connected to both ends of the support member 23 along the third direction. This not only allows the heat dissipation component 20 to be quickly formed, but also allows the channel 24 to be quickly formed in the heat dissipation component 20, thereby simplifying the production steps of the heat dissipation component 20 and improving the production convenience of the heat dissipation component 20. The materials of the first encapsulation layer 212 and the second encapsulation layer 213 include but are not limited to polyimide and polyethylene terephthalate.

[0073] In an embodiment of the present application, the phase change medium 22 can be coated on one of the first packaging layer 212 and the second packaging layer 213 through a slit coating process. After placing multiple support members 23 in the phase change medium 22 in turn, the other one of the first packaging layer 212 and the second packaging layer 213 is covered on the phase change medium 22, and the first packaging layer 212 and the second packaging layer 213 are made to correspond to each other. Then, by hot pressing the circumferential edges of the first packaging layer 212 and the second packaging layer 213 and the heat dissipation area 222, the support member 23 is connected to the outer packaging member 21 to form a channel 24, thereby improving the production convenience of the heat dissipation component 20.

[0074] According to an embodiment of the present application, the size of the first encapsulation layer 212 and the second encapsulation layer 213 in the third direction is D1, and the size of the support member 23 in the third direction is D2. D1 and D2 satisfy the relationship: 0.1mm≤D1≤0.15mm, 1mm≤D2≤1.5mm. Specifically, if the size of the first packaging layer 212 and the second packaging layer 213 in the third direction is set to be less than 0.1 mm, the thickness of the outer packaging 21 is too small and it is easy to be damaged, so that the phase change medium 22 is easy to flow out of the outer packaging 21 and cause waste; if the size of the first packaging layer 212 and the second packaging layer 213 in the third direction is set to be greater than 0.15 mm, the thickness of the outer packaging 21 is too large, which reduces the capacity inside the outer packaging 21, resulting in a reduction in the volume of the phase change medium 22 in the heat dissipation component 20, affecting the heat dissipation capacity of the heat dissipation component 20; if the size of the first packaging layer 212 and the second packaging layer 213 in the third direction is set to be between 0.1 mm and 0.15 mm, not only can the structural strength of the outer packaging 21 be guaranteed, but also the heat absorption capacity of the phase change medium 22 can be increased, thereby improving the heat dissipation effect of the heat dissipation component 20, and further ensuring the charging safety of the battery pack 100.

[0075] Furthermore, if the size of the support member 23 in the third direction is set to be less than 1 mm, the cross-sectional width of the support member 23 is too small, resulting in weak structural strength of the support member 23, and the support member 23 is easily deformed when the battery cell 10 expands uncontrollably. If the size of the support member 23 in the third direction is set to be greater than 1.5 mm, the cross-sectional width of the support member 23 is too large, resulting in a reduced amount of phase change medium 22, affecting the heat absorption capacity of the heat dissipation component 20. If the size of the support member 23 in the third direction is set to between 1 mm and 1.5 mm, not only can the structural strength of the support member 23 be guaranteed, but also the heat absorption capacity of the phase change medium 22 can be increased, thereby improving the heat dissipation effect of the heat dissipation component 20, and further ensuring the charging safety of the battery pack 100.

[0076] As shown in Figures 2-3 , a packaging region 214 is formed on the circumferential edge of the outer package 21. The packaging region 214 is at least partially thinned to form the outlet 211. Specifically, the circumferential edges of the first packaging layer 212 and the second packaging layer 213 are hot-pressed to form the packaging region 214. The packaging region 214 has a certain thickness to ensure the connection reliability of the first packaging layer 212 and the second packaging layer 213, and to ensure the structural reliability of the outer package 21. The packaging region 214 is at least partially thinned to form the outlet 211 of the heat dissipation assembly 20.

[0077] With this arrangement, on the one hand, when the battery cell 10 is cooled or generates low heat, the structural integrity of the heat dissipation assembly 20 can be ensured, and the phase change medium 22 can be prevented from being lost from the outer package 21, resulting in waste of phase change material. On the other hand, when the battery cell 10 generates a large amount of heat, the phase change medium 22 absorbs heat and expands. When the pressure in the heat dissipation assembly 20 exceeds the maximum stress that can be tolerated at the outlet 211 of the packaging area 214, the phase change medium 22 can quickly break through the outlet 211 and flow out of the outer package 21, so that the heat dissipation assembly 20 is quickly depressurized. This not only ensures the normal operation of the heat dissipation assembly 20, but also allows the phase change medium 22 to fully absorb heat in the heat dissipation assembly 20, thereby improving the utilization rate of the phase change medium 22. In an embodiment of the present application, the outlet 211 can be formed by reducing the length of the packaging area 214 along the second direction or reducing the hot pressing temperature of the circumferential edges of the first packaging layer 212 and the second packaging layer 213.

[0078] As shown in FIG2 , an exhaust channel 30 is provided between two adjacent battery cells 10, with an outlet 211 located on at least one side of the outer package 21 in the first direction. The exhaust channel 30 is located outside the heat dissipation assembly 20 on the side corresponding to the outlet 211 and is in communication with the outlet 211. This arrangement ensures connectivity between the outlet 211 and the exhaust channel 30, allowing the phase change medium 22 to flow directly into the exhaust channel 30 after exiting the outer package 21 through the outlet 211. Guided by the exhaust channel 30, the phase change medium 22 smoothly flows out of the thermal runaway position of the battery cell 10, preventing the phase change medium 22 from flowing into other battery cells 10 within the battery pack 100, thereby ensuring the operational reliability of the other battery cells 10 within the battery pack 100.

[0079] As shown in Figure 7, the length of the heat dissipation component 20 in the first direction is smaller than the length of the battery cell 10 in the first direction. With this arrangement, the first packaging layer 212 and the second packaging layer 213 on the heat dissipation component 20 can be used to fit the two adjacent battery cells 10 in the battery pack 100. In this way, all the phase change medium 22 in the packaging component can be used to absorb the heat generated by the battery cell 10, which is beneficial to improving the utilization rate of the phase change medium 22.

[0080] Furthermore, the length of the exhaust channel 30 in the first direction is L1, and the length of the battery cell 10 in the first direction is L2, and L1 and L2 satisfy the relationship: 1 / 100L2≤L1≤3 / 100L2, 1mm≤L1≤3mm. Specifically, the ratio of the length of the exhaust channel 30 in the first direction to the length of the battery cell 10 in the first direction is set to be between 1 / 100 and 3 / 100. In an embodiment of the present application, the length of the exhaust channel 30 in the first direction is between 1mm and 3mm. If the length of the exhaust channel 30 in the first direction is set to be less than 1mm, the width of the exhaust channel 30 is too narrow, the exhaust resistance of the exhaust channel 30 is large, and the pressure cannot be quickly released after the phase change medium 22 breaks through the outlet 211, affecting the timeliness of the pressure release of the heat dissipation component 20.

[0081] Furthermore, if the exhaust channel 30 is set to have a length in the first direction greater than 3 mm, the exhaust channel 30 is too wide, resulting in a reduction in the internal capacity of the outer package 21, which in turn reduces the volume of the phase-change medium 22 in the heat dissipation assembly 20, affecting the heat dissipation and cooling effect of the heat dissipation assembly 20 on the battery cells 10. When the exhaust channel 30 is set to have a length in the first direction between 1 mm and 3 mm, the exhaust channel 30 can be decompressed and unobstructed while ensuring the required amount of phase-change medium 22 in the heat dissipation assembly 20, thereby further improving the heat dissipation effect of the heat dissipation assembly 20 and enhancing the safety of the battery pack 100 during charging.

[0082] The battery pack 100 according to the present application includes the heat dissipation assembly 20 of the present application. In some embodiments of the present application, as shown in FIG1 , multiple battery cells 10 extend in the second direction and are spaced apart in the third direction. Multiple heat dissipation assemblies 20 are provided between two adjacent battery cells 10 along the third direction. The multiple heat dissipation assemblies 20 between two adjacent battery cells 10 are arranged in the second direction. Specifically, the battery cells 10 can also be extended in the second direction in the battery pack 100 and spaced apart in the third direction, so that the two sides of the heat dissipation component 20 along the third direction can be fitted with the two adjacent battery cells 10 along the third direction, which can improve the space utilization of the battery pack 100. Multiple heat dissipation components 20 are arranged between two adjacent battery cells 10, and multiple heat dissipation components 20 are arranged along the second direction between two adjacent battery cells 10, which can increase the contact area between the heat dissipation component 20 and the battery cell 10, so that the heat of each part of the battery cell 10 along the second direction can be quickly and directly transferred to the heat dissipation component 20, thereby increasing the heat dissipation cooling rate of the heat dissipation component 20 on the battery cell 10 and improving the heat dissipation reliability of the heat dissipation component 20 on the battery cell 10.

[0083] In other embodiments of the present application, multiple heat dissipation components 20 between two adjacent battery cells 10 along the third direction are arranged in the first direction, so that when the battery cells 10 are arranged along the first direction, the heat dissipation components 20 can be kept in contact with the battery cells 10 to ensure the heat dissipation reliability of the heat dissipation components 20 for the battery cells 10.

[0084] In yet other embodiments of the present application, multiple heat dissipation assemblies 20 between two adjacent battery cells 10 along the third direction may be arranged in the first and second directions. Thus, when multiple battery cells 10 are provided in the battery pack 100, the multiple heat dissipation assemblies 20 can be aligned with the multiple battery cells 10 to ensure effective heat dissipation for the battery pack 100. In the embodiments of the present application, the first and second directions are perpendicular to each other, ensuring that both sides of the heat dissipation assemblies 20 along the third direction are closely aligned with the two adjacent battery cells 10, thereby improving the heat absorption efficiency of the phase change medium 22 in the heat dissipation assemblies 20 and facilitating increased utilization of the phase change medium 22.

[0085] In the embodiment of the present application, in combination with Figure 1, the shape of the battery cell 10 includes but is not limited to a slender blade-shaped or other square shell battery cells 10 with nearly the same length and width. In this way, multiple heat dissipation components 20 can be arranged between two adjacent battery cells 10 according to the specific structure of the battery cell 10. While ensuring the working safety of the battery pack 100, the adaptability of the heat dissipation component 20 to the battery cell 10 is improved, and the heat dissipation component 20 can be closely fitted to the battery cell 10 to improve the heat absorption efficiency of the phase change medium 22 in the heat dissipation component 20, which is conducive to improving the utilization rate of the phase change medium 22.

[0086] According to some embodiments of the present application, when multiple heat dissipation assemblies 20 are arranged between battery cells 10 along the first direction and the second direction, the outlets 211 of the heat dissipation assemblies 20 in the same direction can be arranged in the same direction. This can facilitate the arrangement of the heat dissipation assemblies 20 in the battery pack 100 and simplify the assembly of the battery pack 100. According to other embodiments of the present application, when multiple heat dissipation assemblies 20 are arranged between battery cells 10 along the first direction and the second direction, the outlets 211 on two adjacent heat dissipation assemblies 20 can be arranged relative to each other. This can expand the space of the exhaust channel 30 on the heat dissipation assembly 20, improve the pressure relief efficiency of the heat dissipation assembly 20, and thus achieve rapid heat dissipation of the battery cells 10.

[0087] According to an embodiment of the present application, there is at least one battery cell 10 between two adjacent heat dissipation components 20. In this way, multiple battery cells 10 can be set between two adjacent heat dissipation components 20, which can improve the utilization rate of the phase change medium 22. While ensuring the working safety of the battery pack 100, the number of battery cells 10 in the battery pack 100 can be increased, and then the battery capacity of the battery pack 100 can be increased, which is beneficial to improving the battery life of the product.

[0088] According to an embodiment of the present application, the battery pack 100 can be applied to an electric device 1000, as shown in Figure 8. In the present application, the heat dissipation component 20 of the battery pack 100 has high heat absorption efficiency and high utilization rate of the phase change medium 22.

[0089] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "circumferential", "radial", "circumferential" and the like to 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 should not be understood as a limitation on the present application.

[0090] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0091] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat dissipation assembly (20), characterized in that: include: An outer packaging member (21), the outer packaging member (21) being adapted to fit with two adjacent battery cells (10) in a battery pack (100); a phase change medium (22); and A support member (23), the support member (23) being arranged in the outer packaging member (21) and defining a channel (24) together with the outer packaging member (21), the phase change medium (22) being located in the channel (24), the outer packaging member (21) being provided with an outlet (211), and the outlet (211) being in communication with the channel (24).

2. The heat dissipation assembly (20) according to claim 1, characterized in that: The channel (24) comprises a plurality of sub-channels (241), and a channel outlet (242) of one of two adjacent sub-channels (241) is connected to a channel inlet (243) of the other sub-channel.

3. The heat dissipation assembly (20) according to claim 2, characterized in that: One of the two adjacent sub-channels (241) is arranged around the outer periphery of the other sub-channel (241).

4. The heat dissipation assembly (20) according to any one of claims 1 to 3, characterized in that: There are a plurality of support members (23), each of which is a frame-shaped member, and the plurality of support members (23) are arranged in a surrounding manner in sequence.

5. The heat dissipation assembly (20) according to claim 4, characterized in that: The two adjacent support members (23) are respectively a first support member (232) and a second support member (233); the first support member (232) is provided with a first notch (2311); the second support member (233) is provided with a second notch (2312); the first notch (2311) is located on one side of the first support member (232) along a first direction; the second notch (2312) is located on a side of the second support member (233) away from the first notch (2311) along the first direction; the notch of the support member (23) in the outermost ring is located on a side of the support member (23) away from the outlet (211) along the first direction; the first direction is a length direction or a width direction of the heat dissipation assembly (20).

6. The heat dissipation assembly (20) according to any one of claims 1 to 3, characterized in that: The support member (23) is in a continuous spiral shape.

7. The heat dissipation assembly (20) according to claim 1 or 2, characterized in that: The support member (23) comprises a plurality of plate segments (235) spaced from each other in a first direction, the plurality of plate segments (235) are all extended in a second direction, two adjacent plate segments (235) are respectively a first plate segment (2351) and a second plate segment (2352), an orthographic projection of the first plate segment (2351) in the first direction and an orthographic projection of the second plate segment (2352) in the first direction partially overlap or do not overlap, wherein the first direction is a length direction of the heat dissipation component (20), and the second direction is a width direction of the heat dissipation component (20), or the first direction is a width direction of the heat dissipation component (20), and the second direction is a length direction of the heat dissipation component (20).

8. The heat dissipation assembly (20) according to claim 2 or 3, characterized in that: Two adjacent sub-channels (241) are respectively a first sub-channel (2411) and a second sub-channel (2412); the first sub-channel (2411) has a plurality of channel outlets (242); the second sub-channel (2412) has a plurality of channel inlets (243); the plurality of channel outlets (242) of the first sub-channel (2411) and the plurality of channel inlets (243) of the second sub-channel (2412) correspond one to one and are interconnected.

9. The heat dissipation assembly (20) according to claim 8, characterized in that: The support member (23) comprises: a plurality of main support members (236), wherein the main support members (236) include a first main body portion (2361) and a first extension portion (2362), wherein the first extension portions (2362) are two and are respectively arranged at two ends of the first main body portion (2361) along its extension direction to form an open opening (25); Among them, the two adjacent main support members (236) are respectively a third support member (2363) and a fourth support member (2364), the fourth support member (2364) is arranged around the outside of the third support member (2363), and the open mouth (25) of the third support member (2363) is arranged opposite to the first main body (2361) of the fourth support member (2364).

10. The heat dissipation assembly (20) according to claim 9, characterized in that: The support member (23) further comprises: A secondary support member (237), wherein the secondary support member (237) is located at the opening (25) of the innermost ring of the main support member (236) to divide the opening (25) into a plurality of sub-openings (251), wherein the sub-openings (251) are channel outlets (242) of the sub-channels (241).

11. The heat dissipation assembly (20) according to any one of claims 1 to 10, characterized in that: The outer packaging component (21) comprises a first packaging layer (212) and a second packaging layer (213); the first packaging layer (212) and the second packaging layer (213) are respectively arranged on both sides of the phase change medium (22) along a third direction; the first packaging layer (212) and the second packaging layer (213) are respectively used to fit with two adjacent battery cells (10) in the battery pack (100); the support component (23) is respectively connected to the first packaging layer (212) and the second packaging layer (213) on both sides along the third direction; the support component (23) defines the channel (24) with the first packaging layer (212) and the second packaging layer (213); and the third direction is the thickness direction of the heat dissipation component (20).

12. The heat dissipation assembly (20) according to any one of claims 1 to 11, characterized in that: A packaging area (214) is at least partially formed on the circumferential edge of the outer packaging member (21), and the packaging area (214) is at least partially thinned to form the outlet (211).

13. The heat dissipation assembly (20) according to any one of claims 1 to 12, characterized in that: An exhaust channel (30) is provided between two adjacent battery cells (10); the outlet (211) is located on at least one side of the outer packaging component (21) along a first direction; and the exhaust channel (30) is located outside the heat dissipation component (20) on a side corresponding to the outlet (211) and is in communication with the outlet (211).

14. The heat dissipation assembly (20) according to claim 13, characterized in that: The length of the heat dissipation component (20) in the first direction is less than or equal to the length of the battery cell (10) in the first direction, the length of the exhaust channel (30) in the first direction is L1, the length of the battery cell (10) in the first direction is L2, and L1 and L2 satisfy the relationship: 1 / 100L2≤L1≤3 / 100L2.

15. The heat dissipation assembly (20) according to claim 14, characterized in that: L1 satisfies the relationship: 1mm≤L1≤3mm.

16. A battery pack (100), characterized in that: include: The heat dissipation assembly (20) according to any one of claims 1 to 15; as well as A battery cell (10), wherein the battery cell (10) is extended in a second direction and is in plurality, the plurality of battery cells (10) are spaced apart in a third direction, and the heat dissipation assembly (20) is disposed between two adjacent battery cells (10) in the third direction.

17. The battery pack (100) according to claim 16, characterized in that: The battery pack (100) includes a plurality of the heat dissipation components (20), wherein the plurality of the heat dissipation components (20) between two adjacent battery cells (10) along a third direction are arranged in the second direction; and / or the plurality of the heat dissipation components (20) between two adjacent battery cells (10) along the third direction are arranged in the first direction, wherein the first direction and the second direction are perpendicular to each other.

18. The battery pack (100) according to claim 16 or 17, characterized in that: At least one of the battery cores (10) exists between two adjacent heat dissipation components (20).

19. An electrical device (1000), characterized in that: include: A battery pack (100) according to any one of claims 16 to 18.

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