Heat exchange assembly, battery assembly and electric equipment

Abstract

The embodiment of the utility model provides a heat exchange assembly, a battery assembly and electric equipment, and relates to the technical field of new energy development. The heat exchange assembly comprises a shell, a packaging part and a heat exchange medium, the shell is provided with a first surface, the first surface is provided with a plurality of first grooves, at least part of the first grooves are communicated, the packaging part and the shell are arranged in a stacked mode, at least part of the first grooves are covered with the packaging part, and a closed space is formed between the packaging part and the shell. The closed space is filled with the heat exchange medium, the density of the heat exchange medium is reduced after the heat exchange medium absorbs heat of a heating piece, the heat exchange medium can move relative to the heat exchange medium with the large density, meanwhile, after the original heat exchange medium in the first groove absorbs heat and moves, gaps are formed in the first groove, and other heat exchange media can enter the first groove again under the action of capillary force to be filled. By enabling the heat exchange assembly, the battery assembly and the electric equipment to meet the structure, the circulation rate of the heat exchange medium in the heat exchange assembly can be improved, heat can be conducted quickly, and therefore the heat exchange effect of the heat exchange assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy development, and in particular to a heat exchange component, a battery component and electrical equipment. Background Art

[0002] During long-term use or charging and discharging, the battery may easily overheat due to overcharging, over-discharging, battery short circuit or mechanical damage. The battery temperature rises rapidly, leading to serious safety problems such as overheating, combustion or even explosion. The above heating process may also easily affect other adjacent batteries and cause chain heating, resulting in thermal runaway of the battery pack, which cannot be effectively controlled and suppressed.

[0003] Usually, heat exchange materials are used in contact with batteries to allow heat exchange to occur between the batteries and the heat exchange materials, so that the heat generated by the batteries is absorbed by the heat exchange materials. However, after the heat exchange materials absorb part of the heat, the heat is concentrated in the heat exchange materials that are in contact with the heating position of the battery, causing the heat absorption performance of the heat exchange materials for the battery to deteriorate, thereby affecting the heat exchange effect of the heat exchange materials. Utility Model Content

[0004] The utility model aims to provide a heat exchange component, a battery component and an electrical device, which solve the problem that heat is difficult to diffuse in a heat exchange material.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a heat exchange component, comprising: a shell having a first surface, the first surface having a plurality of first grooves, at least some of the first grooves being connected; a packaging component stacked with the shell, the packaging component covering at least some of the first grooves, and a closed space being formed between the packaging component and the shell; and a heat exchange medium filling the closed space.

[0007] In one embodiment, the ratio of the maximum depth of the first groove to the opening size of the first groove is 1:(0.002-0.2).

[0008] In one embodiment, a plurality of the first grooves are arranged in an array on the first surface.

[0009] In one embodiment, a ratio of a sum of orthographic projection areas of the plurality of first grooves on the first surface to an area of ​​the first surface is greater than or equal to 0.9 and less than 1.

[0010] In one embodiment, a plurality of the first grooves are arranged at intervals to form a honeycomb structure.

[0011] In one embodiment, there is a gap between the packaging member and the first surface, the gap between the packaging member and the first surface is connected to the first groove to form a heat exchange channel, and the heat exchange channel is connected to at least a portion of the first groove.

[0012] In one embodiment, a groove wall between two adjacent first grooves has a through hole, and the through hole connects the two adjacent first grooves, so that at least part of the first grooves are connected to form a heat exchange channel.

[0013] In one embodiment, a surface of the package facing the first surface has a plurality of second grooves, and the plurality of second grooves are connected to the enclosed space.

[0014] In one embodiment, the heat exchange medium is a phase change medium.

[0015] In one embodiment, the housing and the packaging component are an integral structure.

[0016] In one embodiment, the heat exchange medium is a hydrogel.

[0017] In a second aspect, the utility model further provides a battery assembly, comprising a battery cell and the heat exchange assembly described in any one embodiment of the first aspect, the shell of the heat exchange assembly having a second surface opposite to the first surface, the second surface being in contact with the surface of the battery cell.

[0018] In one embodiment, the heat exchange component is disposed between two adjacent battery cells, and the heat exchange component is in contact with surfaces of the two battery cells.

[0019] In a third aspect, the utility model further provides an electrical device, comprising an electrical device and a battery assembly as described in any one of the embodiments of the second aspect, wherein the electrical device is electrically connected to the battery assembly.

[0020] The heat exchange component provided by the utility model includes a shell, a package and a heat exchange medium. The package is stacked with the shell, the shell has a first surface, the first surface has a plurality of first grooves, at least some of the first grooves are connected, the package is located on one side of the first surface of the shell, and the package covers at least some of the first grooves, so that a closed space is formed between the package and the shell, and the first groove is connected to the closed space. The heat generation of the heating element is uneven, with the position with severe heat generation as the hot end and the position with less severe heat generation as the cold end. By filling the closed space with heat exchange medium, and the density of the heat exchange medium near the hot end after absorbing heat at the hot end is less than the density of the heat exchange medium near the cold end, the heat exchange medium with a smaller density in the heat exchange medium can move relative to the heat exchange medium with a larger density, so that the heat exchange medium in the first groove near the hot end can form heat exchange with other heat exchange mediums after leaving the original first groove, so as to realize the heat diffusion of the heat exchange medium after absorbing heat.

[0021] At the same time, since a plurality of first grooves are provided on the shell, after the original heat exchange medium in the first groove at the hot end absorbs heat and moves, gaps are generated in the first grooves, and the original first grooves constitute a capillary structure. The capillary force causes the heat exchange medium close to the cold end to enter the original first grooves and refill the original first grooves, so that the heat exchange medium in the original first grooves can be quickly replenished with the heat exchange medium at the cold end after absorbing heat and moving, thereby improving the circulation rate of the heat exchange medium in the heat exchange component, allowing heat to be quickly conducted, thereby improving the heat exchange effect of the heat exchange component. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic structural diagram of a housing and a packaging member in one embodiment;

[0024] Figure 2 is a schematic structural diagram of a package according to an implementation mode;

[0025] Figure 3 The structure diagram of a battery assembly according to one embodiment.

[0026] Description of reference numerals:

[0027] 10-housing, 20-packaging, 30-heat exchange medium, 40-battery core;

[0028] 11-first groove, 21-second groove, 41-pole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] The present invention provides a heat exchange assembly. Figure 1 and Figure 3 The heat exchange component includes a shell 10 and a packaging member 20. The packaging member 20 is stacked with the shell 10. The shell 10 has a first surface. The first surface has a plurality of first grooves 11, and at least some of the first grooves 11 are connected. The plurality of first grooves 11 are arranged at intervals. The packaging member 20 is located on one side of the first surface of the shell 10, and the packaging member 20 covers at least some of the first grooves 11, that is, the orthographic projection of the packaging member 20 on the first surface coincides with at least some of the first grooves 11. When the packaging member 20 is connected to the shell 10, the packaging member 20 can directly contact the edge of the first groove 11; or the packaging member 20 can be connected to the shell 10 at the edge area of ​​the first surface, and there is a gap between the packaging member 20 and the edge of the first groove 11.

[0036] A closed space is formed between the package 20 and the shell 10, so that the heat exchange medium 30 cannot flow out after being filled in the closed space, and the first groove 11 is connected to the closed space, so that the heat exchange medium 30 can flow in the multiple first grooves 11. When the package 20 and the shell 10 form a closed space, the package 20 can be in contact with the edge of the first groove 11, so that multiple closed spaces are formed at at least part of the first grooves 11, and the side walls of two adjacent first grooves 11 have through holes, so that the multiple first grooves 11 are connected; or there can be a gap between the package 20 and the edge of the first groove 11, so that there is a spacing space between the package 20 and the shell 10, and the multiple first grooves 11 are connected through the spacing space between the package 20 and the shell 10.

[0037] The heat exchange assembly is used for heat exchange with the heat generating element. The shell 10 can be a flat plate or a curved plate. The shape of the shell 10 corresponds to the shape of the heat generating element, so that the shell 10 fits the heat generating element, increasing the contact area between the shell 10 and the heat generating element, thereby improving the heat exchange efficiency between the shell 10 and the heat generating element. Optionally, the shape of the package 20 is the same as that of the shell 10, and the area of ​​the package 20 is equal to the area of ​​the shell 10. The edge of the package 20 is sealed to the edge of the shell 10, so that the central area within the edge of the package 20 and the central area within the edge of the shell 10 are both within the scope of the enclosed space, which is conducive to maximizing the volume of the enclosed space and increasing the proportion of the surface of the shell 10 available for heat exchange in the contact surface between the shell 10 and the heat generating element.

[0038] The heat exchange assembly also includes a heat exchange medium 30, which fills the enclosed space, that is, the heat exchange medium 30 is located between the package 20 and the shell 10, and the heat exchange medium 30 is accommodated in the first groove 11. The phase state of the heat exchange medium 30 at room temperature is not limited in this application. At room temperature, the heat exchange medium 30 can be solid or liquid.

[0039] A plurality of first grooves 11 are provided on the shell 10, and the heat exchange medium 30 is filled in the first grooves 11. The density of the heat exchange medium 30 decreases after absorbing heat, and the density increases after releasing heat, so that the density of the heat exchange medium 30 in the first grooves 11 that have absorbed heat is less than the density of the heat exchange medium 30 in the other first grooves 11 that have not absorbed heat, so that the heat exchange medium 30 in different first grooves 11 moves due to the density difference.

[0040] The heating of the heating element is uneven, with the location where the heating is serious being the hot end and the location where the heating is not serious being the cold end. The heat absorbed by the heat exchange medium 30 in the first groove 11 near the hot end is greater than the heat absorbed by the heat exchange medium 30 near the cold end, so that the density of the heat exchange medium 30 in the first groove 11 near the hot end is less than the density of the heat exchange medium 30 near the cold end. The heat exchange medium 30 near the cold end squeezes the heat exchange medium 30 in the first groove 11 near the hot end under the action of gravity, so that the heat exchange medium 30 in the first groove 11 near the hot end moves away from the original first groove 11 under the action of gravity, and the heat exchange medium 30 near the cold end fills the original first groove 11. After leaving the original first groove 11, the heat exchange medium 30 in the first groove 11 near the hot end can form heat exchange with other heat exchange media 30, so as to realize the heat diffusion of the heat exchange medium 30 after absorbing heat.

[0041] At the same time, after the heat exchange medium 30 in the first groove 11 near the hot end moves away from the original first groove 11, a gap is generated in the original first groove 11, and a three-phase interface is formed between the gap, the inner wall of the first groove 11 and the heat exchange medium 30 near the cold end, that is, the original first groove 11 constitutes a capillary structure, and a capillary force is generated at the position where the heat exchange medium 30 near the cold end contacts the inner wall of the original first groove 11. The capillary force prompts the heat exchange medium 30 near the cold end to enter the original first groove 11 and refill the original first groove 11, so that the heat exchange medium 30 in the original first groove 11 can be quickly replenished with the heat exchange medium 30 at the cold end after absorbing heat and moving, thereby improving the circulation rate of the heat exchange medium 30 in the heat exchange component, allowing heat to be quickly conducted, thereby improving the heat exchange effect of the heat exchange component.

[0042] It is understandable that the relative movement between the heat exchange medium 30 in the first groove 11 near the hot end and the heat exchange medium 30 near the cold end due to the density difference and the movement of the heat exchange medium 30 near the cold end to fill the gap in the original first groove 11 under the action of capillary force can be carried out simultaneously. In order to improve the heat exchange efficiency of the heat exchange medium 30, the material of the heat exchange medium 30 is usually a fluid with a higher density, so that the heat exchange medium 30 near the cold end moves slower in the entire heat exchange medium 30. When the structure of the first groove 11 is not provided to replace the heat exchange medium 30, under the action of the viscosity of the heat exchange medium 30, the gap generated after the heat exchange medium 30 in the first groove 11 near the hot end moves away from the original first groove 11 is difficult to be filled in time. By setting the structural capacity of the first groove 11 to replace the heat exchange medium 30, the first groove 11 forms a capillary structure, which increases the capillary force and prompts the heat exchange medium 30 near the cold end to enter the original first groove 11, thereby promoting the relative movement between the heat exchange medium 30 in the first groove 11 near the hot end and the heat exchange medium 30 near the cold end, which is beneficial to the heat diffusion of the heat exchange medium 30 after absorbing heat.

[0043] Optionally, the heat exchange medium 30 can undergo a phase change, and the thermal conductivity of the heat exchange medium 30 after the phase change changes significantly compared to the thermal conductivity of the heat exchange medium 30 before the phase change, that is, the thermal conductivity of the heat exchange medium 30 after the phase change to gas is poorer than that of liquid or solid, which can have a heat insulation effect; and, the heat exchange medium 30 needs to absorb more heat during the phase change, and the heat exchange effect of the heat exchange component is better, thereby effectively avoiding safety problems caused by thermal runaway of the heating element.

[0044] Optionally, the heat exchange medium 30 is a high heat absorption material, which is in a gel state at room temperature or in a solid state. When the heat generated by the heating element is transferred to the heat exchange component, the heat-absorbing part of the heat exchange medium 30 rapidly undergoes a phase change, and part of the heat exchange medium 30 becomes a gaseous state. The gaseous heat exchange medium 30 moves under the action of the density difference, and continues to exchange heat with other surrounding heat exchange media 30 during the movement, and turns back into a gel state after releasing heat. The position where other liquid heat exchange media 30 contact the inner wall of the first groove 11 generates a capillary force, which prompts other heat exchange media 30 to enter the first groove 11 and refill the first groove 11.

[0045] The enclosed space between the package 20 and the shell 10 can be in a negative pressure state to make the phase change temperature of the heat exchange medium 30 lower and the heat exchange medium 30 easier to phase change, thereby promoting the phase change of the heat exchange medium 30 and improving the heat absorption capacity of the heat exchange medium 30, which is beneficial to reduce the temperature at the heating position of the heating element and further avoid safety problems caused by thermal runaway of the heating element.

[0046] The heat exchange assembly can be an integrated structural part, or the heat exchange assembly is a connection of multiple shells 10 and packaging members 20. The edges where two adjacent shells 10 are connected can be provided with multiple first grooves 11 to connect the heat exchange channels of the two adjacent shells 10, thereby increasing the heat exchange medium 30 involved in the circulation, which is beneficial to improving the heat exchange effect of the heat exchange assembly.

[0047] Optionally, the shell 10 and the package 20 are an integrated structure, so that the sealing between the shell 10 and the package 20 is better, preventing the heat exchange medium 30 from overflowing from the heat exchange component during the movement and heat exchange in the heat exchange component, which is beneficial to ensuring the heat exchange effect of the heat exchange component.

[0048] The heat exchange component provided by the utility model includes a shell 10, a packaging component 20 and a heat exchange medium 30. The packaging component 20 is stacked with the shell 10. The shell 10 has a first surface. The first surface has a plurality of first grooves 11. At least some of the first grooves 11 are connected. The packaging component 20 is located on one side of the first surface of the shell 10, and the packaging component 20 covers the first grooves 11, so that a closed space is formed between the packaging component 20 and the shell 10, and the first grooves 11 are connected to the closed space. The heating of the heating element is uneven, the location where the heating is severe is the hot end, and the location where the heating is not severe is the cold end. By filling the closed space with the heat exchange medium 30, and the density of the heat exchange medium 30 near the hot end after absorbing heat at the hot end is lower than the density of the heat exchange medium 30 near the cold end, the heat exchange medium 30 with a smaller density in the heat exchange medium 30 can move relative to the heat exchange medium 30 with a larger density, thereby allowing the heat exchange medium 30 in the first groove 11 near the hot end to form heat exchange with other heat exchange media 30 after leaving the original first groove 11, thereby achieving heat diffusion of the heat exchange medium 30 after absorbing heat.

[0049] At the same time, since a plurality of first grooves 11 are provided on the shell 10, after the original heat exchange medium 30 in the first groove 11 at the hot end absorbs heat and moves, a gap is generated in the first groove 11, and the original first groove 11 constitutes a capillary structure. The capillary force causes the heat exchange medium 30 close to the cold end to enter the original first groove 11 and refill the original first groove 11, so that the heat exchange medium 30 in the original first groove 11 can be quickly replenished with the heat exchange medium 30 at the cold end after absorbing heat and moving, thereby improving the circulation rate of the heat exchange medium 30 in the heat exchange component, allowing heat to be quickly conducted, thereby improving the heat exchange effect of the heat exchange component.

[0050] In one implementation, see Figure 1 The ratio of the maximum depth of the first groove 11 to the opening size of the first groove 11 is 1:(0.002-0.2). Specifically, the ratio of the maximum depth of the first groove 11 to the size of the first groove 11 can be 1:0.01, 1:0.02, 1:0.1, etc., so that the first groove 11 forms a groove with a small opening and a large depth.

[0051] When the opening of the first groove 11 is circular so that the first groove 11 forms a cylindrical through groove, the ratio of the maximum depth of the first groove 11 to the diameter of the opening of the first groove 11 is 1:(0.002-0.2).

[0052] When the opening of the first groove 11 is small and the depth is large, the first groove 11 has a smaller aperture, and the aperture range is between 0.1mm-50mm in equivalent diameter, so that the capillary force exerted on the heat exchange medium 30 when in contact with the inner wall of the first groove 11 is larger, and the filling depth of the heat exchange medium 30 in the first groove 11 is greater, which is more conducive to the timely filling of the first groove 11 by the heat exchange medium 30.

[0053] The distribution positions of the plurality of first grooves 11 on the first surface are set according to actual needs. The opening shape of the first groove 11 includes but is not limited to a rectangle, a circle, a triangle, etc. The opening shapes of the plurality of first grooves 11 can be the same or different, and the opening areas of the plurality of first grooves 11 can be the same or different, and the present application does not impose any restrictions on this.

[0054] Optionally, multiple first grooves 11 are arranged in an array on the first surface, and the multiple first grooves 11 are evenly distributed on the first surface, so that the heat exchange medium 30 at each position of the first surface can be affected by capillary force, so that the heat exchange medium 30 at each position of the first surface can be filled with other heat exchange media 30 in time after absorbing heat and moving, thereby avoiding the problem of vacancies in the heat exchange medium 30 on the first surface and reduced heat exchange effect of the heat exchange component.

[0055] In one implementation, see Figure 1 , the ratio of the sum of the orthographic projection areas of the plurality of first grooves 11 on the first surface to the area of ​​the first surface is greater than or equal to 0.9 and less than 1, that is, the first grooves 11 are present at most positions of the first surface. That is, the heat exchange medium 30 can be affected by the capillary force at most positions of the first surface, so that the heat exchange medium 30 can circulate to most positions of the first surface under the action of the capillary force, so that the heat exchange medium 30 at most positions of the first surface can be filled with other heat exchange media 30 in time after absorbing heat and moving.

[0056] In one implementation, see Figure 1, multiple first grooves 11 are arranged at intervals to form a honeycomb structure. The honeycomb structure has good strength and rigidity, and can enhance the structural stability of the shell 10. By arranging multiple first grooves 11 at intervals to form a honeycomb structure, it is helpful to prevent the heat exchange medium 30 from impacting the first grooves 11 during the circulation movement, causing the first grooves 11 to deform or even be damaged, thereby improving the stability of the heat exchange component structure; at the same time, the multiple first grooves 11 are arranged at intervals to form a honeycomb structure, which can reduce the weight of the shell 10, thereby achieving the effect of reducing the weight of the heat exchange component.

[0057] It is understandable that the shape of the first groove 11 can also include a circle, a rectangle or a triangle, and the shape of the first groove 11 can be selected according to actual needs. Multiple first grooves 11 can be evenly spaced on the first surface, so that the heat exchange medium 30 can be affected by capillary force at each position of the first surface, so that the heat exchange medium 30 can be filled with other heat exchange media 30 in time after absorbing heat and moving at each position of the first surface, thereby avoiding the existence of vacancies in the heat exchange medium 30 on the first surface, which is conducive to improving the heat exchange effect of the heat exchange component; multiple first grooves can be arranged in an array on the first surface to improve the heat exchange uniformity of the heat exchange component.

[0058] The arrangement of the plurality of first grooves 11 includes, but is not limited to, a honeycomb arrangement, and may also be an irregular arrangement or an array arrangement. The arrangement of the plurality of first grooves 11 is designed and changed according to actual needs.

[0059] In one implementation, see Figure 1 and Figure 3 At least part of the first grooves 11 are connected to form a heat exchange channel, so that the heat exchange medium 30 can circulate in the heat exchange channel and continuously diffuse heat to the surrounding heat exchange medium 30 during the movement. At the same time, the original heat exchange medium 30 in the first groove 11 can leave the first groove 11 through the heat exchange channel, and other heat exchange media 30 can refill the first groove 11 through the heat exchange channel, thereby achieving a continuous heat exchange effect.

[0060] Optionally, the groove wall between two adjacent first grooves 11 has a through hole, which connects the two adjacent first grooves 11, so that at least part of the first grooves 11 are connected to form a heat exchange channel, and the space inside at least part of the first grooves 11 together constitutes a closed space, which is conducive to simplifying the design structure of the heat exchange component and reducing the volume of the heat exchange component.

[0061] Optionally, there is a gap between the package 20 and the first surface, and the spacing distance between the package 20 and the first surface ranges from 0.1 to 15 mm. The gap between the package 20 and the first surface is connected to the first groove 11 to form a heat exchange channel, and the heat exchange channel is connected to at least part of the first groove 11, and the space in at least part of the first groove 11 and the space in the heat exchange channel are connected together to form a closed space; compared with setting a through hole in the groove wall between two adjacent first grooves 11, setting a gap between the package 20 and the first surface makes the volume of the heat exchange channel larger, which is conducive to improving the smoothness of the mutual movement of the heat exchange medium 30 in the heat exchange channel, thereby improving the circulation rate of the heat exchange medium 30, and further improving the heat exchange effect of the heat exchange component. And the heat exchange medium is located in the gap between the package 20 and the first surface, so that the first groove 11 and the gap between the package 20 and the first surface form a heat exchange channel.

[0062] In one implementation, see Figure 1 and Figure 2 The surface of the package 20 facing the first surface has a plurality of second grooves 21, and the plurality of second grooves 21 are connected to the enclosed space. When the heat exchange component contacts the hot end, the heat of the hot end is first transferred to the shell 10, and then transferred from the shell 10 to the heat exchange medium 30 in the first groove 11, and then transferred from the heat exchange medium 30 in the first groove 11 to the heat exchange medium 30 in the second groove 21. Similar to the first groove 11, after the original heat exchange medium 30 in the second groove 21 absorbs heat and moves, a gap is generated in the second groove 21, and a capillary force is generated at the position where other heat exchange media 30 contact the inner wall of the second groove 21, and the capillary force prompts other heat exchange media 30 to re-enter the second groove 21 to fill, so that the heat exchange medium 30 in the second groove 21 can be quickly replenished by other heat exchange media 30 after absorbing heat and moving. That is, the other heat exchange media 30 in contact with the inner walls of the second groove 21 and the first groove 11 are affected by capillary force, so that the second groove 21 and the first groove 11 can be filled with other heat exchange media 30 in time, thereby improving the smoothness of the circulation of the heat exchange medium 30 in the confined space, thereby increasing the circulation rate of the heat exchange medium 30, which is beneficial to improving the heat exchange effect of the heat exchange component.

[0063] Optionally, the shell 10 and the packaging component 20 are an integrated structure, and the shell 10 and the packaging component 20 are both packaging films, in which phase change material is encapsulated, and a plurality of first grooves 11 and a plurality of second grooves 21 are arranged on the inner wall of the packaging film, and the heat exchange medium 30 is located in the enclosed space between the shell 10 and the packaging film, so that when the heat exchange component contacts the hot end, after the heat exchange medium 30 in the first groove 11 and the second groove 21 close to the hot end moves, the heat exchange medium 30 close to the cold end can be simultaneously affected by the capillary force of the first groove 11 and the second groove 21, so that the original first groove 11 and the original second groove 21 can be filled with other heat exchange media 30 in time, thereby improving the circulation rate of the heat exchange medium 30.

[0064] Optionally, the heat exchange medium is a phase change medium, which includes but is not limited to at least one of ethylene glycol hydrogel and polyvinyl alcohol hydrogel. The vaporization potential of this material is very large, which makes the heat exchange medium have a larger heat absorption capacity, thereby improving the heat exchange effect of the heat exchange component. At the same time, when this material is not absorbing heat, its fluidity is poor and it can be better shaped.

[0065] The utility model also provides a battery assembly, see Figure 1 and Figure 3 , including a battery cell 40 and a heat exchange component of any one embodiment of the first aspect, the shell 10 of the heat exchange component has a second surface opposite to the first surface, and the second surface is in contact with the surface of the battery cell 40. The material of the shell 10 has good ductility, so that the shell 10 can fit tightly with the battery cell 40, increasing the contact area between the shell 10 and the heating element, so that the heat emitted by the battery cell 40 can be transferred to the shell 10 in time, and the heat exchange efficiency between the shell 10 and the heating element is improved; at the same time, the material of the shell 10 and the packaging 20 has good thermal conductivity, so that the shell 10 can quickly transfer the heat emitted by the battery cell 40 to the heat exchange medium 30, and the heat released by the heat exchange medium 30 can be quickly transferred to the packaging 20, so that the heat is quickly transferred through the heat exchange component, thereby improving the heat exchange effect of the heat exchange component.

[0066] The shell 10 can be fitted with any surface of the battery cell 40. Optionally, the heat exchange component is arranged between two adjacent battery cells 40, and the heat exchange component is fitted with the surfaces of the two battery cells 40. The battery cell 40 can be in the shape of a rectangular parallelepiped. The two poles 41 of the battery cell 40 are respectively arranged on the two opposite surfaces of the battery cell 40. The battery cell 40 includes four adjacent side surfaces in sequence, and the four side surfaces are connected to the surface of the battery cell 40 with the poles 41. The heat exchange component is fitted with the four side surfaces. The two adjacent battery cells 40 are fitted through one of the four side surfaces, and part of the heat exchange component is sandwiched between the two adjacent battery cells 40, so that the heat exchange component is fitted with the surfaces of the two battery cells 40, that is, the heat exchange component is fitted with the eight side surfaces of the two battery cells 40; so that the contact area between the heat exchange component and the battery cell 40 is increased, and the range of protection of the battery cell 40 is increased, thereby reducing the probability of thermal runaway of the battery cell 40. At the same time, the heat exchange component is fitted with the eight adjacent side surfaces of the two battery cells 40.

[0067] The utility model also provides an electrical device, see Figure 1 and Figure 3 , including an electrical device and a battery assembly according to any one embodiment of the second aspect, wherein the electrical device is electrically connected to the battery assembly.

[0068] It can be understood that the electrical equipment in this embodiment has the battery assembly in the above-mentioned embodiments. Therefore, the electrical equipment in this embodiment has all the technical effects of the battery assembly in the above-mentioned embodiments. Since the technical effects of the battery assembly have been fully explained in the above-mentioned embodiments, they will not be repeated here.

[0069] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0070] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A heat exchange component, characterized in that: include: A housing having a first surface, wherein the first surface has a plurality of first grooves, at least some of the first grooves are connected; A packaging component, stacked with the shell, the packaging component covers at least a portion of the first groove, and a closed space is formed between the packaging component and the shell; A heat exchange medium fills the enclosed space.

2. The heat exchange assembly according to claim 1, characterized in that: The ratio of the maximum depth of the first groove to the opening size of the first groove is 1:(0.002-0.2).

3. The heat exchange assembly according to claim 1, characterized in that: A plurality of the first grooves are arranged in an array on the first surface.

4. The heat exchange assembly according to claim 2 or 3, characterized in that: A ratio of a sum of orthographic projection areas of the plurality of first grooves on the first surface to an area of ​​the first surface is greater than or equal to 0.9 and less than 1.

5. The heat exchange component according to any one of claims 1 to 3, characterized in that: The plurality of first grooves are arranged at intervals to form a honeycomb structure.

6. The heat exchange assembly according to claim 1, characterized in that: A gap is provided between the packaging component and the first surface. The gap between the packaging component and the first surface forms a heat exchange channel. The heat exchange channel is connected to at least a portion of the first groove.

7. The heat exchange assembly according to claim 1, characterized in that: A groove wall between two adjacent first grooves has a through hole, and the through hole connects the two adjacent first grooves, so that at least part of the first grooves are connected to form a heat exchange channel.

8. The heat exchange assembly according to claim 6 or 7, characterized in that: The surface of the packaging component facing the first surface has a plurality of second grooves, and the plurality of second grooves are communicated with the enclosed space.

9. The heat exchange assembly according to claim 1, characterized in that: The heat exchange medium is a phase change medium.

10. The heat exchange assembly according to claim 1, characterized in that: The shell and the packaging component are an integrated structure.

11. The heat exchange assembly according to claim 1 or 9, characterized in that: The heat exchange medium is hydrogel.

12. A battery assembly, characterized in that: It comprises a battery cell and the heat exchange component according to any one of claims 1 to 11, wherein the shell of the heat exchange component has a second surface opposite to the first surface, and the second surface is in contact with the surface of the battery cell.

13. The battery assembly according to claim 12, characterized in that The heat exchange component is arranged between two adjacent battery cores, and the heat exchange component is in contact with surfaces of the two battery cores.

14. An electrical device, characterized in that: It comprises an electrical device and a battery assembly as claimed in any one of claims 12 to 13, wherein the electrical device is electrically connected to the battery assembly.

Images