Heat exchange assembly, battery assembly with heat exchange assembly and electric equipment with heat exchange assembly

Abstract

The utility model discloses a heat exchange assembly, a battery assembly with the heat exchange assembly and electric equipment with the heat exchange assembly. The packaging piece comprises a body part and a plurality of connecting parts which are connected, the body part is connected with the heat exchange layer, the connecting parts exceed the edge of the heat exchange layer, the plurality of connecting parts are connected to enable the packaging piece to define a closed space for placing the heat exchange layer, the distance between the edge, provided with the connecting parts, of the packaging piece and the heat exchange layer is y, the thickness of the heat exchange layer is x, y = 1 + mx, 2 < = m < = 8. According to the heat exchange assembly provided by the embodiment of the utility model, the heat exchange layer is packaged in the closed space, and the distance between the edge, provided with the connecting part, of the packaging piece and the heat exchange layer is limited, so that the material exchange between the heat exchange layer and the external environment is isolated; and the heat exchange layer can conveniently, stably and quickly absorb and guide out heat in the out-of-control battery for a long time, and the safety of electric appliances or nearby batteries near the thermal out-of-control battery can be conveniently guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery components, and in particular, to a heat exchange component, a battery component having the same, and an electrical device having the battery component. Background Art

[0002] In related technologies, a heat absorption sheet is provided in a battery. The heat absorption sheet is usually made of a heat absorption material such as a composite material of hydrated salt crystals, so as to be able to absorb the heat generated by a battery cell. However, during the use of the battery, the heat absorption sheet may have problems such as liquid leakage and water molecule volatilization, seriously affecting the use performance of the heat absorption sheet in the battery. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a heat exchange component. By encapsulating a heat exchange layer in a closed space and defining the distance requirement between the edge of the encapsulation member provided with a connecting portion and the heat exchange layer, while isolating the material exchange between the heat exchange layer and the external environment, it is also possible to facilitate the heat exchange layer to quickly absorb and conduct the heat in the out-of-control battery for a long time and stably, and it is also convenient to ensure the safety of electrical appliances or nearby batteries near the thermal runaway battery.

[0004] The utility model also provides a battery component having the heat exchange component.

[0005] The utility model also provides an electrical device having the battery component.

[0006] The heat exchange component according to the first aspect embodiment of the utility model includes: a heat exchange layer; an encapsulation member, the encapsulation member includes a connected body portion and a plurality of connecting portions, the body portion is connected to the heat exchange layer, the connecting portions extend beyond the edge of the heat exchange layer, and the plurality of connecting portions are connected to define a closed space for placing the heat exchange layer. The distance between the edge of the encapsulation member provided with the connecting portion and the heat exchange layer is y, the thickness of the heat exchange layer is x, and y = 1 + mx, where 2 ≤ m ≤ 8.

[0007] The heat exchange component according to the embodiment of the utility model isolates the material exchange between the heat exchange layer and the external environment by encapsulating the heat exchange layer in a closed space and defining the distance requirement between the edge of the encapsulation member provided with the connecting portion and the heat exchange layer. At the same time, it is also possible to facilitate the heat exchange layer to quickly absorb and conduct the heat in the out-of-control battery for a long time and stably, and it is also convenient to ensure the safety of electrical appliances or nearby batteries near the thermal runaway battery.

[0008] In addition, the heat exchange component according to the above embodiment of the utility model may further have the following additional technical features:

[0009] According to some embodiments of the present utility model, 0.5 mm ≤ x ≤ 2.5 mm; and / or, 2 ≤ m ≤ 4.

[0010] According to some embodiments of the present utility model, the connecting portion is disposed around the heat exchange layer.

[0011] According to some embodiments of the present utility model, the encapsulation member includes two encapsulation films, and the two encapsulation films are located on both sides of the heat exchange layer in the thickness direction; each encapsulation film includes the body portion and the connecting portion, and the connecting portions of the two encapsulation films are connected to enclose at least one side of the outer periphery of the heat exchange layer.

[0012] According to some embodiments of the present utility model, a thermal conductive adhesive layer is provided between at least one of the encapsulation films and the heat exchange layer.

[0013] According to some alternative embodiments of the present utility model, the edge of at least one layer of the thermal conductive adhesive layer extends beyond the heat exchange layer to be located between the two encapsulation films.

[0014] According to some alternative embodiments of the present utility model, in the thickness direction of the heat exchange layer, the projections of the centers of the encapsulation film, the thermal conductive adhesive layer, and the heat exchange layer overlap;

[0015] and / or, in the thickness direction of the heat exchange layer, the projected area of the encapsulation film and the projected area of the thermal conductive adhesive layer are equal and greater than the projected area of the heat exchange layer.

[0016] According to some alternative embodiments of the present utility model, the encapsulation film and the thermal conductive adhesive layer together form an aluminum-plastic film; or, the encapsulation film is formed of one of PET film, PI film, PTFE film, PP film, PE film, or mica paper.

[0017] According to some specific embodiments of the present utility model, the thickness of the encapsulation film is 10 μm to 200 μm.

[0018] According to some alternative embodiments of the present utility model, the thermal conductive adhesive layer is formed of at least one of acrylic glue, polyurethane glue, epoxy glue, or silicone glue, and the thickness of the thermal conductive adhesive layer is 5 μm to 50 μm; or, the thermal conductive adhesive layer is formed of PP or PE, and the thickness of the thermal conductive adhesive layer is 30 μm to 120 μm; or, the peel strength of the two connecting portions ≥ 5 N / 8 mm.

[0019] According to some embodiments of the present utility model, the heat exchange layer is a phase change material layer.

[0020] According to some alternative embodiments of the present utility model, the volume resistivity of the heat exchange layer ≥ 1×10 14Ω·m; and / or, the heat exchange layer contains at least one of graphite and fiber.

[0021] According to a second aspect embodiment of the present invention, a battery assembly is provided, which includes: a plurality of battery cells; the heat exchange assembly according to the embodiment of the first aspect of the present invention, and the heat exchange assembly is disposed between at least two adjacent battery cells, and the heat exchange assembly exchanges heat with the battery cells.

[0022] For the battery assembly according to the embodiment of the present invention, by using the heat exchange assembly according to the embodiment of the first aspect of the present invention, by encapsulating the heat exchange layer in a closed space and defining the distance requirement between the edge of the encapsulating member provided with the connecting portion and the heat exchange layer, while isolating the material exchange between the heat exchange layer and the external environment, it is also possible to facilitate the heat exchange layer to quickly absorb and conduct the heat in the out-of-control battery for a long time and stably, and it is also convenient to ensure the safety of the electrical appliances or nearby batteries near the thermally out-of-control battery.

[0023] According to a third aspect embodiment of the present invention, an electrical device is provided, which includes the battery assembly according to the embodiment of the second aspect of the present invention.

[0024] For the electrical device according to the embodiment of the present invention, by using the battery assembly according to the embodiment of the second aspect of the present invention, by encapsulating the heat exchange layer in a closed space and defining the distance requirement between the edge of the encapsulating member provided with the connecting portion and the heat exchange layer, while isolating the material exchange between the heat exchange layer and the external environment, it is also possible to facilitate the heat exchange layer to quickly absorb and conduct the heat in the out-of-control battery for a long time and stably, and it is also convenient to ensure the safety of the electrical appliances or nearby batteries near the thermally out-of-control battery.

[0025] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0027] Figure 1 is an exploded view of the structure of the heat exchange assembly according to the embodiment of the present invention;

[0028] Figure 2 is a schematic structural view of the encapsulating film and the heat exchange layer according to the embodiment of the present invention;

[0029] Figure 3 is a cross-sectional view of the heat exchange assembly according to the embodiment of the present invention.

[0030] Reference numerals: heat exchange component 1, heat exchange layer 10,

[0031] encapsulation film 20, body part 21, connecting parts 22, thermally conductive adhesive layer 30. Detailed implementation manners

[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0033] The heat exchange component 1 according to an embodiment of the present utility model will be described below with reference to the drawings.

[0034] As Figures 1 - 3 shown, the heat exchange component 1 according to an embodiment of the present utility model includes a heat exchange layer 10 and an encapsulation member.

[0035] The encapsulation member includes a connected body part 21 and a plurality of connecting parts 22. The body part 21 is connected to the heat exchange layer 10, and the connecting parts 22 extend beyond the edge of the heat exchange layer 10. The plurality of connecting parts 22 are connected to define a closed space for placing the heat exchange layer 10, so as to enclose the heat exchange layer 10 in the encapsulation member, thereby achieving the purpose of improving the use safety of the heat exchange component and extending the service life of the heat exchange component.

[0036] Among them, the connection of the plurality of connecting parts 22 means that the plurality of connecting parts 22 are directly connected or indirectly connected, and no excessive limitation is made here. The connection of the body part 21 and the heat exchange layer 10 means that the body part 21 and the heat exchange layer 10 are oppositely arranged, and they may or may not be in contact with each other. In addition, they may also be connected by a thermally conductive adhesive.

[0037] The heat exchange layer 10 is used for heat exchange with the battery cell. Specifically, when the battery has a thermal runaway, the heat exchange layer 10 quickly absorbs and conducts the heat in the runaway battery by an endothermic method, thereby ensuring the safety of the electrical appliances or nearby batteries near the runaway battery.

[0038] Among them, by encapsulating the heat exchange layer 10 in two encapsulation members, even if the water molecules in the heat exchange layer 10 volatilize, the water molecules will not volatilize to the outside. Therefore, it is convenient for the heat exchange layer 10 to re-absorb the water molecules, and it is convenient for the heat exchange layer 10 to quickly absorb and conduct the heat in the runaway battery for a long time and stably. In this way, it is convenient to improve the service life of the heat exchange layer 10, and further improve the service life of the heat exchange component.

[0039] When the liquid in the heat exchange layer 10 leaks, the encapsulation member can also be used to contain the leaked liquid, thereby facilitating the safety of the electrical appliances or nearby batteries near the runaway battery.

[0040] Among them, the distance between the edge of the encapsulation member provided with the connecting portion 22 and the heat exchange layer 10 is y, the thickness of the heat exchange layer 10 is x, and y = 1 + mx, where 2 ≤ m ≤ 8.

[0041] That is to say, the distance between the edge of the encapsulation member provided with the connecting portion 22 and the heat exchange layer 10 is greater than the thickness of the heat exchange layer 10, so that when multiple connecting portions 22 are connected, they can fully cover the side portion of the outer periphery of the heat exchange layer 10 to enclose the enclosed space, encapsulate the heat exchange layer 10, and then encapsulate the heat exchange layer 10 in the enclosed space. By defining the distance requirement between the edge of the encapsulation member provided with the connecting portion 22 and the heat exchange layer 10 in the disclosed embodiment of the present application, while isolating the mass exchange between the heat exchange layer 10 and the external environment, it is also possible to facilitate the heat exchange layer 10 to quickly absorb and export the heat in the out-of-control battery for a long time and stably, and it is also convenient to ensure the safety of electrical appliances or nearby batteries near the thermal runaway battery.

[0042] Here, it needs to be explained that the edge of the encapsulation member provided with the connecting portion 22 can be understood as the edge on the side of the connecting portion 22 away from the body portion 21. The distance between the edge of the encapsulation member provided with the connecting portion 22 and the heat exchange layer 10 refers to the distance y between the edge on the side of the connecting portion 22 away from the body portion 21 and the edge of the heat exchange layer 10 in the state where the multiple connecting portions 22 are not yet connected, that is, in the state where the connecting portions 22 are laid flat.

[0043] When the connecting portion 22 is laid flat, the edge on the side of the connecting portion 22 away from the body portion 21 is parallel to the corresponding edge of the heat exchange layer 10. For example, the edge on the side of the connecting portion 22 away from the body portion 21 and the corresponding edge of the heat exchange layer 10 both extend in the first direction, and the distance y between the edge on the side of the connecting portion 22 away from the body portion 21 and the edge of the heat exchange layer 10 is the distance in the direction perpendicular to the first direction.

[0044] In addition, 2 ≤ m ≤ 8 is used to control the range of the length y of the connecting portion 22 extending beyond the edge of the heat exchange layer 10. Making 2 ≤ m enables two connecting portions 22 to cover the side portion of the outer periphery of the heat exchange layer 10, and at least some of the connecting portions 22 can be connected together to form a crimping edge, thereby facilitating strengthening the connection strength between the two connecting portions 22 and enabling the encapsulation member to fully encapsulate the heat exchange layer 10.

[0045] Making m ≤ 8 is to avoid the length y of the connecting portion 22 extending beyond the edge of the heat exchange layer 10 being too long, thereby controlling the size of the heat exchange component 1.

[0046] Therefore, the heat exchange component 1 according to the embodiment of the present utility model is capable of isolating the heat exchange layer 10 from the mass exchange with the external environment while facilitating the heat exchange layer 10 to rapidly absorb and conduct the heat in the out-of-control battery in a long-term and stable manner, and also facilitating the safety of electrical appliances or nearby batteries near the thermal runaway battery, by encapsulating the heat exchange layer 10 in a closed space and defining the distance requirement between the edge of the encapsulating member provided with the connecting portion 22 and the heat exchange layer 10.

[0047] The heat exchange component 1 according to the specific embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0048] In some specific embodiments of the present utility model, as Figures 1 - 3 shown, the heat exchange component 1 includes a heat exchange layer 10 and an encapsulating member.

[0049] In some embodiments of the present utility model, 0.5 mm ≤ x ≤ 2.5 mm to control the thickness of the heat exchange layer 10.

[0050] Among them, 0.5 mm ≤ x is to avoid the heat exchange layer 10 being too thin to affect its heat exchange performance, and x ≤ 2.5 mm is to avoid the heat exchange layer 10 being too large in size.

[0051] X can be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.9 mm, 2 mm, 2.2 mm, 2.4 mm or 2.5 mm, and no further elaboration will be made here.

[0052] In some embodiments, when x is 0.5 mm to 1 mm, y is 5 mm; when x is 1.5 mm to 2.5 mm, y is 8 mm to 10 mm.

[0053] In some alternative embodiments of the present utility model, 2 ≤ m ≤ 4 to further control the distance between the edge of the encapsulating member provided with the connecting portion 22 and the heat exchange layer 10, and to avoid the length of the encapsulating member exceeding the edge of the heat exchange layer 10 being too long to affect the overall size of the heat exchange component.

[0054] Specifically, 2 ≤ m is to control the range of the distance y between the edge of the encapsulating member provided with the connecting portion 22 and the heat exchange layer 10, and 2 ≤ m is to enable the two connecting portions 22 to cover the side portions of the outer periphery of the heat exchange layer 10, and at least part of the connecting portions 22 can be connected together to form a crimping edge, thereby facilitating the strengthening of the connection strength of the multiple connecting portions 22 to fully encapsulate the heat exchange layer 10 in a closed space.

[0055] m ≤ 4 is to avoid the distance y between the edge of the encapsulating member provided with the connecting portion 22 and the heat exchange layer 10 being too long, thereby controlling the size of the heat exchange component 1.

[0056] In some embodiments of the present utility model, the connecting portion 22 is disposed around the heat exchange layer 10 to fully encapsulate the heat exchange layer 10 by means of the encapsulating member.

[0057] In some embodiments, the encapsulating member includes two connecting portions 22. The two connecting portions 22 are located on both sides of the heat exchange layer 10 in the thickness direction. Each connecting portion 22 is disposed around the heat exchange layer 10. In this way, when the two connecting portions 22 are not yet connected, the opening of the enclosed space is relatively large, which facilitates placing the heat exchange layer 10 in the enclosed space and reduces the difficulty of assembly.

[0058] After placing the heat exchange layer 10 in the enclosed space, the two connecting portions 22 are connected to close the opening of the enclosed space, thereby enclosing the heat exchange layer 10 in the enclosed space.

[0059] In some embodiments of the present utility model, as Figure 3 shown, the encapsulating member includes two encapsulating films 20. The two encapsulating films 20 are located on both sides of the heat exchange layer 10 in the thickness direction. Each encapsulating film 20 includes a body portion 21 and a connecting portion 22. The connecting portions 22 of the two encapsulating films 20 are connected to close at least one side of the outer periphery of the heat exchange layer 10, thereby enclosing the heat exchange layer 10 within the two encapsulating films 20.

[0060] In some embodiments, the two encapsulating films 20 can be integrally provided at the same end, and the connecting portion 22 is used for connection at the other three ends of the encapsulating film 20 to form an enclosed space for enclosing the heat exchange layer 10. In addition, the two encapsulating films 20 can be integrally provided at at least three ends, thereby forming a bag-like structure, and then the connecting portion 22 is used for connection at the other end of the encapsulating film 20 to form an enclosed space for enclosing the heat exchange layer 10.

[0061] In some embodiments, the heat exchange layer 10 is a heat exchange plate with a certain thickness. Therefore, the heat exchange layer 10 has six surfaces. The two encapsulating films 20 are located on both sides of the heat exchange layer 10 in the thickness direction. The body portions 21 of the two encapsulating films 20 enclose the two surfaces of the heat exchange layer 10 in the thickness direction. The connecting portions 22 extend beyond the edge of the heat exchange layer 10 and surround the heat exchange layer 10. The two connecting portions 22 are connected to jointly enclose the four surfaces on the side portions of the heat exchange layer 10 by means of the two connecting portions 22, thereby achieving full encapsulation of the heat exchange layer 10.

[0062] Among them, the materials and sizes of the two encapsulating films 20 can be the same or different, and no excessive limitation is imposed here.

[0063] In some embodiments, as Figure 2As shown, in the thickness direction of the heat exchange layer 10, the projection of the heat exchange layer 10 is rectangular, the projection of the encapsulation film 20 when not crimped is rectangular, the connecting portion 22 extends beyond the edge of the heat exchange layer 10 and is disposed around the heat exchange layer 10. The connecting portion 22 includes four connecting parts connected end to end. Two of the connecting parts are located on both sides in the width direction of the projection of the heat exchange layer 10 and extend along the length direction for closing the two side surfaces in the width direction of the heat exchange layer 10. The other two connecting parts are located on both sides in the length direction of the projection of the heat exchange layer 10 and extend along the width direction for closing the two side surfaces in the length direction of the heat exchange layer 10.

[0064] Wherein, the distance y between the edges of the four connecting parts away from the body portion 21 and the edges of the heat exchange layer 10 can be the same, or partially the same, or all different, and no excessive limitation is made here.

[0065] In some embodiments of the present utility model, as Figure 1 , Figure 3 shown, a heat conduction adhesive layer 30 is provided between at least one encapsulation film 20 and the heat exchange layer 10. The heat conduction adhesive layer 30 is used to adhesively connect the encapsulation film 20 and the heat exchange layer 10 together, and further fix the encapsulation film 20 and the heat exchange layer 10 together to better encapsulate the heat exchange layer 10 by using the encapsulation film 20. That is, a heat conduction adhesive layer 30 is provided between the body portion 21 and the heat exchange layer 10.

[0066] In some alternative embodiments of the present utility model, as Figure 3 shown, the edge of at least one layer of the heat conduction adhesive layer 30 extends beyond the heat exchange layer 10 to be located between the two encapsulation films 20, so as to adhesively connect the two connecting portions 22 by using a part of the heat conduction adhesive layer 30, and further enable the two encapsulation films 20 to fully seal the side portion of the outer periphery of the heat exchange layer 10.

[0067] Specifically, by pressing the heat conduction adhesive layer 30 extending beyond the outer periphery of the heat exchange layer 10 and the connecting portion 22, the two connecting portions 22 can be connected by using the heat conduction adhesive layer 30, and further a crimped edge is formed on at least one side of the heat exchange layer 10 to fully seal the heat exchange layer 10 within the two encapsulation films 20.

[0068] In some embodiments, heat conduction adhesive layers 30 are provided between the two encapsulation films 20 and the heat exchange layer 10. It can be that the edge of one of the heat conduction adhesive layers 30 extends beyond the heat exchange layer 10 to be located between the two connecting portions 22, or both of the two heat conduction adhesive layers 30 exceed the heat exchange layer 10 and are located between the two connecting portions 22.

[0069] Wherein, the materials of the two heat conduction adhesive layers 30 can be the same or different, and no excessive limitation is made here.

[0070] In some alternative embodiments of the present utility model, in the thickness direction of the heat exchange layer 10, the projections of the centers of the encapsulation film 20, the thermally conductive adhesive layer 30, and the heat exchange layer 10 overlap, so as to be able to make full use of the encapsulation film 20 to encapsulate the heat exchange layer 10, and use the thermally conductive adhesive layer 30 to adhesively connect the heat exchange layer 10 and the encapsulation film 20 together, improving the utilization rate of the encapsulation film 20 and the thermally conductive adhesive layer 30.

[0071] Specifically, making the projections of the centers of the encapsulation film 20, the thermally conductive adhesive layer 30, and the heat exchange layer 10 overlap, such that the encapsulation film 20 and the thermally conductive adhesive layer 30 are evenly laid on one side in the thickness direction of the heat exchange layer 10, thereby facilitating the reduction of waste of the encapsulation film 20 and the thermally conductive adhesive layer 30 and improving the utilization rate.

[0072] For example, the heat exchange layer 10 is a heat exchange plate with a certain thickness. Therefore, the heat exchange layer 10 has six surfaces. Two encapsulation films 20 are located on both sides in the thickness direction of the heat exchange layer 10. The body parts 21 of the two encapsulation films 20 enclose the two surfaces of the heat exchange layer 10 in the thickness direction. The connecting parts 22 extend beyond the edges of the heat exchange layer 10 and surround the heat exchange layer 10. The connecting parts 22 include four connecting portions that are connected end to end.

[0073] If the distance by which the projection of the center of the encapsulation film 20 is offset from the projection of the center of the heat exchange layer 10 is relatively large, it will result in a relatively large difference in the sizes of the two connecting portions on both sides of the encapsulation film 20 in the width direction, or a relatively large difference in the sizes of the two connecting portions on both sides of the encapsulation film 20 in the length direction, easily causing waste of resources, or resulting in the situation that the connecting portion with a smaller size cannot completely enclose the side of the heat exchange layer 10, or the adhesive strength when the two connecting portions with smaller sizes are connected is relatively small.

[0074] In some alternative embodiments of the present utility model, in the thickness direction of the heat exchange layer 10, the projected area of the encapsulation film 20 and the projected area of the thermally conductive adhesive layer 30 are equal, so as to make full use of the thermally conductive adhesive layer 30 to adhesively bond the body part 21 and the heat exchange layer 10, and bond the two connecting parts 22, thereby using the two connecting parts 22 to encapsulate the heat exchange layer 10 in a closed space.

[0075] Among them, the projected area of the encapsulation film 20 is larger than the projected area of the heat exchange layer 10, so that the encapsulation film 20 has a part that extends beyond the heat exchange layer 10, that is, the connecting part 22. The projected area of the thermally conductive adhesive layer 30 is larger than the projected area of the heat exchange layer 10, so that at least part of the thermally conductive adhesive layer 30 is located between the two connecting parts 22, enabling the thermally conductive adhesive layer 30 to adhesively connect the two connecting parts 22 together, and using the connecting part 22 to enclose at least one side of the outer periphery of the heat exchange layer 10, thereby enclosing the heat exchange layer 10 in the two encapsulation films 20.

[0076] In some alternative embodiments of the present utility model, the encapsulation film 20 and the thermally conductive adhesive layer 30 together form an aluminum-plastic film. In this way, during manufacturing, the encapsulation film 20 and the thermally conductive adhesive layer 30 can be manufactured together, eliminating the step of connecting the encapsulation film 20 and the thermally conductive adhesive layer 30 together.

[0077] Among them, when using two aluminum-plastic films to encapsulate the heat exchange layer 10, the side of the aluminum-plastic film with the plastic film is sticky, and the two aluminum-plastic films can be directly fixed on both sides of the heat exchange layer 10 in the thickness direction. By pressing the part of the aluminum-plastic film that extends beyond the outer edge of the heat exchange layer 10, the parts of the two aluminum-plastic films that exceed the outer edge of the heat exchange layer 10 can be connected together, and then a crimp can be formed around the heat exchange layer 10 to fully seal the heat exchange layer 10 inside the two aluminum-plastic films.

[0078] In some other alternative embodiments of the present utility model, the encapsulation film 20 is one of a PET film, a PI film, a PTFE film, a PP film, a PE film, or mica paper, so as to be able to encapsulate the heat exchange layer 10. Of course, the encapsulation film 20 can also be other encapsulation materials, and no excessive restrictions are imposed here.

[0079] In some specific embodiments of the present utility model, the thickness of the encapsulation film 20 is 10 μm to 200 μm, making the thickness of the encapsulation film 20 less than or equal to 200 μm to avoid the thickness of the encapsulation film 20 being too thick and affecting the heat conduction of the heat exchange component 1, and making the thickness of the encapsulation film 20 greater than or equal to 10 μm to avoid the thickness of the encapsulation film 20 being too thin and affecting the encapsulation effect on the heat exchange layer 10.

[0080] Furthermore, the thickness of the encapsulation film 20 is 12 μm to 100 μm.

[0081] Among them, the thickness of the encapsulation film 20 can be 12 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or 100 μm, and no excessive restrictions are imposed here.

[0082] In some alternative embodiments of the present utility model, the thermally conductive adhesive layer 30 is formed by at least one of acrylic glue, polyurethane glue, epoxy glue, or silicone glue. The thickness of the thermally conductive adhesive layer 30 is 5 μm to 50 μm. Among them, the thickness of the thermally conductive adhesive layer 30 is made less than or equal to 50 μm to avoid the thickness of the thermally conductive adhesive layer 30 being too thick and affecting the heat conduction of the heat exchange component 1, and the thickness of the thermally conductive adhesive layer 30 is made greater than or equal to 5 μm to avoid the thickness of the thermally conductive adhesive layer 30 being too thin and affecting the connection strength.

[0083] Furthermore, the thickness of the thermally conductive adhesive layer 30 is 10 μm to 30 μm.

[0084] Among them, the thickness of the thermally conductive adhesive layer 30 can be 10μm, 15μm, 20μm, 25μm or 30μm, and there is no excessive limitation here.

[0085] In some embodiments, the encapsulation film 20 is a PET film, a PI film, a PTFE film, a PP film, a PE film or mica paper, and the thermally conductive adhesive layer 30 is formed of acrylic adhesive, polyurethane adhesive, epoxy adhesive or silica gel, so that the encapsulation film 20 and the heat exchange layer 10 can be connected by the thermally conductive adhesive layer 30, and the two connecting parts 22 can be connected together by the thermally conductive adhesive layer 30.

[0086] In some embodiments, by controlling the thickness and material of the thermally conductive adhesive layer 30, the adhesive strength of the thermally conductive adhesive layer 30 can be controlled. After experiments, after the two connecting parts 22 are sealed and pressed together by the thermally conductive adhesive layer 30 in the above embodiments, the peel strength of the two connecting parts 22 is ≥5N / 8mm to ensure the connection strength of the two connecting parts 22.

[0087] Specifically, at a temperature of 25°C, the peel strength of the two connecting parts 22 is ≥5N / 8mm to ensure the connection strength of the two connecting parts 22.

[0088] In some other alternative embodiments of the present invention, the thermally conductive adhesive layer 30 is formed of PP or PE, and the thickness of the thermally conductive adhesive layer 30 is 30μm to 120μm. Among them, the thickness of the thermally conductive adhesive layer 30 is made less than or equal to 120μm to prevent the thickness of the thermally conductive adhesive layer 30 from being too thick and affecting the heat conduction of the heat exchange component 1, and the thickness of the thermally conductive adhesive layer 30 is made greater than or equal to 30μm to prevent the thickness of the thermally conductive adhesive layer 30 from being too thin and affecting the connection strength.

[0089] Furthermore, the thickness of the thermally conductive adhesive layer 30 is 50μm to 90μm.

[0090] Among them, the thickness of the thermally conductive adhesive layer 30 can be 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm or 90μm, and there is no excessive limitation here.

[0091] In some embodiments, the encapsulation film 20 and the thermally conductive adhesive layer 30 together form an aluminum-plastic film to facilitate the connection of the two encapsulation films 20 and the connection of the two connecting parts 22.

[0092] In some embodiments, by controlling the thickness and material of the thermally conductive adhesive layer 30, the adhesive strength of the thermally conductive adhesive layer 30 can be controlled. After experiments, after the two connecting parts 22 are sealed and pressed together by the thermally conductive adhesive layer 30 in the above embodiments.

[0093] Specifically, at a temperature of 25°C, the peel strength of the two connecting parts 22 ≥ 5 N / 8 mm to ensure the connection strength of the two connecting parts 22.

[0094] In some embodiments of the present invention, the heat exchange layer 10 is a phase change material layer, so as to be able to utilize the heat exchange layer 10 to absorb the heat in the thermal runaway battery, and then quickly absorb and export the heat in the runaway battery to ensure the safety of the electrical appliances or nearby batteries near the runaway battery.

[0095] In some embodiments, the heat exchange layer 10 is formed of paraffin, stearic acid, crystalline hydrated salt or ammonium salt materials.

[0096] In some embodiments, other materials can also be added to the phase change material, such as adding graphite to improve the thermal conductivity of the heat exchange layer 10, increase the energy storage density and safety of the heat exchange layer 10; or adding fibers to improve the temperature regulation function of the heat exchange layer 10 and improve the flexibility of the heat exchange layer 10, etc. There are no excessive restrictions here.

[0097] In some embodiments, the volume resistivity of the heat exchange layer 10 ≥ 1×10 14 Ω·m, so that the heat exchange layer 10 has insulation, and then it is convenient to improve the safety degree of use of the heat exchange component 1.

[0098] The battery assembly according to the embodiment of the present invention will be described below. The battery assembly according to the embodiment of the present invention includes a plurality of battery cells and the heat exchange component 1 according to the above embodiment of the present invention.

[0099] The heat exchange component 1 is provided between at least some adjacent two battery cells, and the heat exchange component 1 exchanges heat with the battery cells to absorb the heat generated by the battery cells. Then, when a thermal runaway occurs in the battery, the heat exchange layer 10 quickly absorbs and exports the heat in the runaway battery by means of heat absorption, thereby ensuring the safety of the electrical appliances or nearby batteries near the runaway battery.

[0100] The battery assembly may include a housing, battery cells and the heat exchange component 1. The housing has an accommodation space, and both the battery cells and the heat exchange component 1 are located in the housing. The above heat exchange component is arranged between adjacent two battery cells, thereby ensuring the safety of the battery assembly.

[0101] For the battery assembly according to the embodiment of the present invention, by utilizing the heat exchange component 1 according to the above embodiment of the present invention, by encapsulating the heat exchange layer 10 in a closed space and defining the distance requirement between the edge of the encapsulation member provided with the connecting part 22 and the heat exchange layer 10, while isolating the mass exchange between the heat exchange layer 10 and the external environment, it is also possible to facilitate the heat exchange layer 10 to quickly absorb and export the heat in the runaway battery for a long time and stably, and it is also convenient to ensure the safety of the electrical appliances or nearby batteries near the thermal runaway battery.

[0102] The electrical equipment according to an embodiment of the present utility model is described below. The electrical equipment according to an embodiment of the present utility model includes a battery assembly according to the above embodiment of the present utility model.

[0103] For the electrical equipment according to an embodiment of the present utility model, by using the battery assembly according to the above embodiment of the present utility model, by encapsulating the heat exchange layer 10 in a closed space to isolate the mass exchange between the heat exchange layer 10 and the external environment, it is convenient for the heat exchange layer 10 to quickly absorb and export the heat in the out-of-control battery for a long time and stably, and it is convenient to ensure the safety of electrical appliances or nearby batteries near the thermal runaway battery.

[0104] Other configurations and operations of the battery assembly according to an embodiment of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0105] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0106] In the description of the present utility model, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0107] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0108] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0109] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A heat exchange component, characterized in that, Comprising: A heat exchange layer (10); A package, the package includes a connected body portion (21) and a plurality of connecting portions (22), the body portion (21) is connected to the heat exchange layer (10), the connecting portions (22) extend beyond the edge of the heat exchange layer (10), and the plurality of connecting portions (22) are connected to define a closed space for placing the heat exchange layer (10). The distance between the edge of the package provided with the connecting portions (22) and the heat exchange layer (10) is y, and the thickness of the heat exchange layer (10) is x. y = 1 + mx, where 2 ≤ m ≤ 8.

2. The heat exchange component according to claim 1, characterized in that 0.5mm ≤ x ≤ 2.5mm; And / or, 2 ≤ m ≤ 4.

3. The heat exchange component according to claim 1, wherein The connecting portion (22) is arranged to surround the heat exchange layer (10).

4. The heat exchange component according to claim 1, wherein The package includes two packaging films (20), and the two packaging films (20) are located on both sides of the heat exchange layer (10) in the thickness direction; each packaging film (20) includes the body portion (21) and the connecting portion (22), and the connecting portions (22) of the two packaging films (20) are connected to enclose at least one side of the outer periphery of the heat exchange layer.

5. The heat exchange component according to claim 4, characterized in that A thermal conductive adhesive layer (30) is provided between at least one of the packaging films (20) and the heat exchange layer (10).

6. The heat exchange component according to claim 5, characterized in that, The edge of at least one layer of the thermal conductive adhesive layer (30) extends beyond the heat exchange layer (10) to be located between the two packaging films (20).

7. The heat exchange component according to claim 5, wherein In the thickness direction of the heat exchange layer (10), the projections of the centers of the packaging film (20), the thermal conductive adhesive layer (30), and the heat exchange layer (10) overlap. And / or, in the thickness direction of the heat exchange layer (10), the projected area of the packaging film (20) and the projected area of the thermal conductive adhesive layer (30) are equal and larger than the projected area of the heat exchange layer (10).

8. The heat exchange component according to claim 5, characterized in that, The packaging film (20) and the thermal conductive adhesive layer (30) together form an aluminum-plastic film; Or, the packaging film (20) is one of a PET film, a PI film, a PTFE film, a PP film, a PE film, or mica paper.

9. The heat exchange component according to claim 8, characterized in that, The thickness of the packaging film (20) is 10μm - 200μm.

10. The heat exchange component according to claim 5, characterized in that, The thermal conductive adhesive layer (30) is formed of one of acrylic glue, polyurethane glue, epoxy glue, or silicone glue, and the thickness of the thermal conductive adhesive layer (30) is 5μm - 50μm; Or, the thermal conductive adhesive layer (30) is formed of PP or PE, and the thickness of the thermal conductive adhesive layer (30) is 30μm - 120μm; Or, the peel strength of the two connecting portions (22) ≥ 5N / 8mm.

11. The heat exchange component according to any one of claims 1-10, characterized in that, The heat exchange layer (10) is a phase change material layer.

12. The heat exchange component according to claim 11, characterized in that, The volume resistivity of the heat exchange layer (10) ≥ 1×10 14 Ω·m; And / or, the heat exchange layer (10) contains at least one of graphite and fiber.

13. A battery assembly, characterized in that, Comprising: A plurality of battery cells; According to any one of claims 1 - 12, the heat exchange component is provided between at least some adjacent two of the battery cells, and the heat exchange component exchanges heat with the battery cells.

14. An electrical device, characterized in that, Including the battery assembly according to claim 13.

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