A heat dissipation element mounting structure, an electrical connector and a power battery

Abstract

The application discloses a heat dissipation element mounting structure, an electric connector and a power battery. The heat dissipation element mounting structure is used for mounting a heat dissipation element on a body of the electric connector. The heat dissipation element mounting structure comprises an elastic component and a heat diffusion component. The elastic component has a first upper surface and a first lower surface. The elastic component is made of an elastic material. The heat diffusion component comprises a first heat diffusion layer and a second heat diffusion layer. The first heat diffusion layer is arranged on the first upper surface, and the second heat diffusion layer is arranged on the first lower surface. The first heat diffusion layer and the second heat diffusion layer are in thermal conduction connection. The heat diffusion component is made of a heat diffusion material. When the heat dissipation element mounting structure is applied, more area on the top of the body of the electric connector can be covered, so that the heat dissipation performance of the battery cell is relatively guaranteed.

Description

Technical Field

[0001] This application relates to the field of power battery thermal management technology, specifically to a heat dissipation element mounting structure, electrical connectors, and a power battery. Background Technology

[0002] Currently, the development of electric vehicles is mainly limited by two key factors: the charging efficiency and safety of power batteries. Improving charging efficiency primarily involves increasing charging power. However, as charging power increases, battery heat generation also rises. Excessive heat generation not only limits charging power, affecting charging time targets, but also leads to a continuous rise in battery temperature under insufficient heat dissipation, potentially causing thermal runaway and serious safety incidents. Therefore, to balance high charging efficiency and high safety, power batteries must possess sufficiently high heat dissipation capabilities. In practice, this is generally achieved by increasing the heat transfer coefficient and increasing the heat transfer area. Since battery thermal resistance accounts for a large proportion of the entire heat transfer path, the benefits of increasing the heat transfer coefficient are not as significant as those of increasing the heat transfer area; therefore, increasing the heat transfer area is typically the primary method to improve heat dissipation.

[0003] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the battery cell structure in related technologies. Figure 2 This is a partial structural diagram of a power battery cell connected by electrical connectors in a related technology. Figure 3 This is a schematic diagram of the installation structure of the heat dissipation element above the cell terminal of a power battery in related technologies.

[0004] To increase the heat exchange area, heat dissipation elements are often placed on various surfaces of the battery cell. Related technologies include... Figure 1 and Figure 2 As shown, the battery cell 01 has a top surface 01a, on which a protruding terminal post 02 is provided, and an electrical connection piece 03 is provided above the terminal post 02; as Figure 3 As shown, a heat dissipation element 04 is typically placed above the electrical connector 03, and a thermally conductive sealant 05 is used to fill the gap between the heat dissipation element 04 and the electrical connector 03 to achieve a thermal interface connection between them. However, in this heat dissipation element installation method, due to the unevenness of the top surface of the electrical connector 03, it is difficult for the thermally conductive sealant 05 to cover a large area of ​​the top of the electrical connector 03 after application, resulting in poor heat dissipation performance of the battery cell 01.

[0005] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a heat dissipation element mounting structure that can cover a large area of ​​the top of the electrical connector body, thereby relatively ensuring the heat dissipation performance of the battery cell. Another purpose of this application is to provide an electrical connector. A further purpose of this application is to provide a power battery.

[0007] To solve the above-mentioned technical problems, this application provides a heat dissipation element mounting structure, which is used to mount a heat dissipation element on an electrical connector body. The heat dissipation element mounting structure includes an elastic component and a heat diffusion component.

[0008] The elastic component has a first upper surface and a first lower surface, and the elastic component is made of an elastic material;

[0009] The heat diffusion component includes a first heat diffusion layer and a second heat diffusion layer. The first heat diffusion layer is disposed on the first upper surface, and the second heat diffusion layer is disposed on the first lower surface. The first heat diffusion layer and the second heat diffusion layer are thermally connected. The heat diffusion component is made of a heat diffusion material.

[0010] The heat dissipation element mounting structure provided in this application includes an elastic component and a heat diffusion component. The first heat diffusion layer of the heat diffusion component is disposed on the upper surface of the elastic component, and the second heat diffusion layer is disposed on the lower surface of the elastic component. Moreover, the first heat diffusion layer and the second heat diffusion layer are thermally connected. When the heat dissipation element is mounted on the electrical connector body through the heat dissipation element mounting structure, under the action of downward pressure, the elastic component can be compressed and deformed according to the shape of the upper surface of the electrical connector body. This causes the lower part of the heat dissipation element mounting structure to deform and fill the recessed part of the upper surface of the electrical connector body, thereby enabling the heat dissipation element mounting structure to cover a larger area of ​​the top of the electrical connector body, so as to relatively ensure the heat dissipation performance of the battery cell.

[0011] Optionally, the elastic member also has an outer surface, and the heat diffusion member further includes a third heat diffusion layer;

[0012] The first upper surface and the first lower surface are connected through the outer side surface, and the outer side surface is provided with the third heat diffusion layer. The first heat diffusion layer and the second heat diffusion layer are connected through the third heat diffusion layer.

[0013] Optionally, all points on the first upper surface are equidistant from the first lower surface.

[0014] Optionally, the upper surface of the electrical connector body is provided with a positioning groove, and the heat dissipation element mounting structure has a first clearance hole extending in the vertical direction, wherein the number of the first clearance holes and the positioning groove are the same and correspond one-to-one; and / or,

[0015] The electrical connector body has a positioning hole that runs through the vertical direction, and the heat dissipation element mounting structure has a second clearance hole that runs through the vertical direction. The number of the second clearance holes and the positioning holes are the same and they correspond one-to-one.

[0016] Optionally, the heat diffusion component further includes a third heat diffusion layer, through which the first heat diffusion layer and the second heat diffusion layer are connected;

[0017] The first clearance hole corresponds to a first inner side surface, and the first inner side surface is provided with the third heat diffusion layer; and / or, the second clearance hole corresponds to a second inner side surface, and the second inner side surface is provided with the third heat diffusion layer.

[0018] Optionally, the heat dissipation element mounting structure further includes a first adhesive layer, the first heat diffusion layer having a second upper surface, the first adhesive layer being disposed on the second upper surface, and the first heat diffusion layer being bonded to the heat dissipation element through the first adhesive layer; and / or,

[0019] The heat dissipation element mounting structure further includes a second adhesive layer, the second heat diffusion layer having a second lower surface, the second adhesive layer being disposed on the second lower surface, and the second heat diffusion layer being bonded to the electrical connector body via the second adhesive layer; and / or,

[0020] The heat dissipation element mounting structure also includes a third adhesive layer, through which the heat diffusion component and the elastic component are bonded.

[0021] Optionally, the first adhesive layer is double-sided tape; and / or, the second adhesive layer is double-sided tape; and / or, the third adhesive layer is double-sided tape.

[0022] Optionally, the in-plane thermal diffusivity of the thermal diffusive material is above 100 W / (m·K).

[0023] Optionally, the heat-diffusing material is graphite, superconducting graphite, or boron nitride.

[0024] Optionally, the thickness of the first heat diffusion layer is 0.1mm to 1.0mm; and / or, the thickness of the second heat diffusion layer is 0.1mm to 1.0mm; and / or, the heat diffusion component further includes a third heat diffusion layer, the first heat diffusion layer and the second heat diffusion layer are connected through the third heat diffusion layer, and the thickness of the third heat diffusion layer is 0.1mm to 1.0mm.

[0025] Optionally, the heat-diffusing material is an insulating material; and / or, the outer surface of the heat-diffusing component is covered with an insulating material; and / or, the elastic material is an insulating material; and / or, the outer surface of the elastic component is covered with an insulating material.

[0026] Optionally, the elastic material is foam.

[0027] This application also provides an electrical connector, which includes the electrical connector body and the heat dissipation element mounting structure;

[0028] The heat dissipation element mounting structure is located on the upper surface of the electrical connector body.

[0029] The electrical connector provided in this application, since it includes the aforementioned heat dissipation element mounting structure, also has all the beneficial effects of the aforementioned heat dissipation element mounting structure, which will not be described in detail here.

[0030] This application also provides a power battery, which includes the heat dissipation element, the electrical connector, and a plurality of battery cells;

[0031] The two adjacent battery cells are connected by the electrical connector body, and the heat dissipation element is disposed on the upper surface of the heat dissipation element mounting structure.

[0032] The power battery provided in this application includes the aforementioned electrical connectors and also possesses all the beneficial effects of the aforementioned electrical connectors, which will not be elaborated upon here. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the battery cell structure in related technologies;

[0034] Figure 2 This is a partial structural diagram of a power battery cell connected by electrical connectors in a related technology.

[0035] Figure 3 This is a schematic diagram of the installation structure of the heat dissipation element above the cell terminal of a power battery in related technologies;

[0036] Figure 4 This is a schematic diagram of the arrangement structure of a row of battery cells in a power battery in related technologies;

[0037] Figure 5 A schematic diagram of the structure of a power battery after electrical connection pieces are installed on two rows of cells in a related technology;

[0038] Figure 6 This is a schematic diagram of the heat dissipation element mounting structure of the embodiment provided in this application being mounted on the electrical connector body;

[0039] Figure 7 for Figure 6 A cross-sectional view of the heat dissipation element mounting structure shown.

[0040] Figure 8 This is a schematic diagram of the structure of the electrical connector body in the embodiments provided in this application;

[0041] Figure 9 for Figure 7 The diagram shows the heat flow path of the heat dissipation element mounting structure.

[0042] The reference numerals in the above figures are explained as follows:

[0043] 01-Battery cell, 01a-Top surface, 01b-Bottom surface, 01c-Large surface, 01d-Small surface, 02-Terminal post, 03-Electrical connector, 04-Heat dissipation element, 05-Thermal conductive sealant;

[0044] 1-Elastic component, 1a-First upper surface, 1b-First lower surface, 1c-Outer surface;

[0045] 2-Heat diffusion component, 21-First heat diffusion layer, 21a-Second upper surface, 22-Second heat diffusion layer, 22a-Second lower surface, 23-Third heat diffusion layer;

[0046] 31 - First adhesive layer, 32 - Second adhesive layer;

[0047] 41-First clearance hole, 41a-First inner surface, 42-Second clearance hole, 42a-Second inner surface;

[0048] 5-Electrical connector body, 51-Positioning groove, 52-Positioning hole, 53-Bent part, 53a-Recessed part, 531-Arc-shaped part. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] It should be noted that in this application, the terms "first" and "second" are used only to facilitate the description of two or more structures or components that are identical or similar in structure and / or function, and do not indicate any special limitation on order and / or importance.

[0051] In this application, the term "several" refers to a number of uncertain quantities, usually two or more; and when "several" is used to indicate the quantity of certain components, it does not indicate the quantitative relationship between these components.

[0052] In this application, "and / or" merely describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0053] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] Please refer to this as well. Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the arrangement of a row of battery cells in a power battery in related technologies. Figure 5 A schematic diagram of the structure of a power battery after electrical connection pieces are installed on the two rows of cells in the relevant technology.

[0055] In related technologies, taking prismatic battery cells as an example, such as Figure 1 As shown, the battery cell 01 has a top surface 01a, a bottom surface 01b, a large lateral surface 01c, and a small lateral surface 01d. To increase the heat exchange area of ​​the battery cell 01, more area needs to be available for cooling. The bottom surface 01b, the large lateral surface 01c, and the small lateral surface 01d are relatively flat, making it easy to arrange the heat dissipation element 04. However, if... Figure 1 and Figure 2 As shown, a protruding pole 02 is provided on the top surface 01a, and an electrical connecting piece 03 is also provided above the pole 02. This makes the top of the battery cell 01 uneven, which makes it difficult to arrange the heat dissipation element 04. At this time, in order to arrange the heat dissipation element 04 at the top of the battery cell 01, the heat dissipation element 04 is often placed above the electrical connecting piece 03. However, the upper surface area of ​​the electrical connecting piece 03 is smaller than that of the top surface 01a. At the same time, the upper surface of the electrical connecting piece 03 is uneven, which means that the electrical connecting piece 03 can only partially contact the heat dissipation element 04. This results in a small contact area between the electrical connecting piece 03 and the heat dissipation element 04, i.e., a small heat dissipation area, leading to poor heat dissipation performance of the battery cell 01.

[0056] Furthermore, such as Figure 3 As shown, to increase the contact area between the upper surface of the electrical connector 03 and the lower surface of the heat dissipation element 04, thermally conductive sealant 05 is typically used to connect the heat dissipation element 04 and the electrical connector 03, achieving a thermal interface connection between the thermally conductive sealant 05 and the heat dissipation element 04. However, because the upper surface of the electrical connector 03 is uneven, it is difficult for the thermally conductive sealant 05 to cover the recessed area at the top of the electrical connector 03 during application. This makes it difficult for the thermally conductive sealant 05 to achieve a large coating area, resulting in poor heat dissipation performance of the battery cell 01.

[0057] Please refer to this as well. Figures 6 to 8 , Figure 6This is a schematic diagram of the heat dissipation element mounting structure of the embodiment provided in this application being mounted on the electrical connector body. Figure 7 for Figure 6 The diagram shows a cross-sectional view of the heat dissipation element mounting structure. Figure 8 This is a schematic diagram of the structure of the electrical connector body in the embodiment provided in this application.

[0058] To address the aforementioned problems in the prior art, this application provides a heat dissipation element mounting structure for mounting a heat dissipation element onto the electrical connector body 5. For example... Figure 6 As shown, the heat dissipation element mounting structure includes an elastic component 1 and a heat diffusion component 2. For example... Figure 7 As shown, the elastic component 1 has a first upper surface 1a and a first lower surface 1b, and the elastic component 1 is made of an elastic material; the heat diffusion component 2 includes a first heat diffusion layer 21 and a second heat diffusion layer 22, the first heat diffusion layer 21 is disposed on the first upper surface 1a, the second heat diffusion layer 22 is disposed on the first lower surface 1b, the first heat diffusion layer 21 and the second heat diffusion layer 22 are thermally connected, and the heat diffusion component 2 is made of a heat diffusion material.

[0059] Thus, when the heat dissipation element is installed on the electrical connector body 5 using the heat dissipation element mounting structure provided in this application embodiment, under downward pressure, the elastic member 1 can be compressed and deformed according to the shape of the upper surface of the electrical connector body 5, so that the lower part of the heat dissipation element mounting structure can deform and fill the recessed area on the upper surface of the electrical connector body 5, thereby enabling the heat dissipation element mounting structure to cover a larger area of ​​the top of the electrical connector body 5, so as to relatively ensure the heat dissipation performance of the battery cell.

[0060] In addition, such as Figure 4 and Figure 5 As shown, since the power battery is composed of multiple cells 01, during the assembly process, there is a height difference between the cells 01 along the extension direction of the terminal post 02, which forms an assembly tolerance. The area where the thermally conductive sealant 05 is finally applied is... Figure 5 The area shown in the dashed box in the figure can also make it difficult for the thermally conductive sealant 05 to cover a large area on the top of the electrical connector 03. The deformation of the elastic component 1 in the heat dissipation element mounting structure provided in the above embodiment of this application can also absorb the above assembly tolerance, so that the heat dissipation element mounting structure covers a large area on the top of the electrical connector body 5.

[0061] In actual use, the structure of the electrical connector body 5 is not limited.

[0062] In the embodiments of this application, such as Figure 8As shown, the upper surface of the electrical connector body 5 is provided with two positioning grooves 51. The two positioning grooves 51 are used to avoid the welding fixture when welding the two poles of the battery cell. The electrical connector body 5 has several positioning holes 52 that run vertically through the body. The positioning holes 52 are used to position the electrical connector body 5 when it is installed on the battery cell. The middle part of the electrical connector body 5 is usually provided with a bending part 53. The bending part 53 can absorb the expansion and tolerance of the battery cell. The bending part 53 includes at least one arc-shaped part 531. The upper surface of the arc-shaped part 531 is recessed downward to form a recess 53a. The presence of the recess 53a makes the surface of the electrical connector body 5 where thermal connection occurs, i.e., the upper surface, uneven. If the heat dissipation element is installed by applying thermally conductive sealant as in the prior art, the thermally conductive sealant is difficult to completely apply into the recess 53a, and the thermally conductive sealant is difficult to completely cover all areas of the upper surface of the electrical connector body 5.

[0063] It is easy to understand that a heat dissipation element is a structure that can cool the battery cell. It may have a cooling channel, and a cooling medium may be passed through the cooling channel. When installing the heat dissipation element, the heat dissipation element mounting structure can be installed on the electrical connector body 5 first, so that the lower surface of the heat dissipation element mounting structure and the upper surface of the electrical connector body 5 are in contact. Then, the electrical connector formed by the heat dissipation element mounting structure and the electrical connector body 5 is installed on the top of the battery cell. Finally, the heat dissipation element is installed on the heat dissipation element mounting structure, so that the lower surface of the heat dissipation element and the upper surface of the heat dissipation element mounting structure are in contact.

[0064] In this embodiment, the elastic material is a type of material with the ability to recover its deformation. It can undergo elastic deformation under external force, but can return to its original shape after the external force is removed. Thus, the elastic component 1 can deform under external force. Therefore, when the heat dissipation element is installed on the heat dissipation element mounting structure, downward pressure can be provided to compress the elastic component 1 from top to bottom and generate a rebound force. The entire heat dissipation element mounting structure is then compressed from top to bottom. Under the action of the rebound force, the bottom of the heat dissipation element mounting structure fills the area of ​​the recessed top of the electrical connector body 5, that is, fills the recessed part 53a, so that the lower surface of the heat dissipation element mounting structure and the corresponding surface of the recessed part 53a are in contact. In this way, the heat dissipation element mounting structure provided in this embodiment can easily cover a large area of ​​the top of the electrical connector body 5, or even completely fit with the entire upper surface of the electrical connector body 5. Thus, there is a large and sufficient heat transfer area between the electrical connector body 5 and the heat dissipation element mounting structure, which can relatively ensure the heat dissipation performance of the battery cell.

[0065] In actual installation, the specific type of elastic material is not limited.

[0066] In the embodiments provided in this application, the elastic material is foam. This not only enables the elastic component 1 to have high elasticity, which can improve the fit between the heat dissipation element mounting structure and the upper surface of the electrical connector body 5, but also makes it easier to install the heat dissipation element mounting structure on the electrical connector body 5. Furthermore, it enables the elastic component 1 to have a lighter weight, which is beneficial to reducing the weight of the power battery.

[0067] Furthermore, the foam can be PU foam, silicone foam, CR foam, or melamine foam. The elastic component 1 can be made of one elastic material in one layer, or made of two or more different elastic materials, without any specific restrictions.

[0068] In actual setup, the way the first heat diffusion layer 21 and the second heat diffusion layer 22 are thermally connected is not limited. The first heat diffusion layer 21 and the second heat diffusion layer 22 can be directly connected, or the first heat diffusion layer 21 and the second heat diffusion layer 22 can be connected through an additional thermally conductive material. The specific setup can be determined according to the shape of the elastic component 1.

[0069] like Figure 6 and Figure 7 As shown, in the embodiments provided in this application, the elastic component 1 may further have an outer surface 1c, and the first upper surface 1a and the first lower surface 1b are connected through the outer surface 1c. Correspondingly, the heat diffusion component 2 may further include a third heat diffusion layer 23. The outer surface 1c is provided with the third heat diffusion layer 23, and the first heat diffusion layer 21 and the second heat diffusion layer 22 can be connected through the third heat diffusion layer 23. In this way, the structure of the heat dissipation element mounting structure is relatively simple, easier to manufacture, and easier to fit the heat dissipation element and the electrical connector body 5 during use.

[0070] Please refer to this as well. Figure 9 , Figure 9 for Figure 7 The diagram shows the heat flow path of the heat dissipation element mounting structure. Figure 9 In the diagram, the arrows indicate the paths through which heat is transferred within the mounting structure of the heat dissipation element.

[0071] The heat diffusion material used in the heat diffusion component 2 in the above embodiments of this application is a type of material with a high in-plane thermal diffusivity. Here, the in-plane thermal diffusivity is also known as the in-plane thermal conductivity, specifically the ability of a material to transfer heat in the in-plane direction, which can be expressed as the heat flow rate per unit area in the plane direction per unit time, with units of W / (m·K). For each heat diffusion layer of the heat diffusion component 2, the direction with the smaller dimension is the thickness direction, and the direction perpendicular to the thickness direction is the in-plane direction. For example, the thickness directions of the first heat diffusion layer 21 and the second heat diffusion layer 22 are in the in-plane direction. Figure 9 The middle direction is vertical, and the thickness direction of the third thermal diffusion layer 23 is vertical. Figure 9 The center is in the left-right direction, and the second heat diffusion layer 22 is in the in-plane direction, that is... Figure 9 The horizontal direction has a high thermal diffusivity, and the third thermal diffusivity layer 23 has a high thermal diffusivity in its in-plane direction. Figure 9 The vertical direction of the component has a high thermal diffusivity. In use, by utilizing the high in-plane thermal diffusivity of the thermal diffusion component 2, heat can diffuse from a point to a surface, increasing the heat dissipation area.

[0072] Specifically, after the heat dissipation element is installed on the electrical connector body 5 using the heat dissipation element mounting structure provided in the above embodiments of this application, the heat of the battery cell electrode can be transferred to the second heat diffusion layer 22 through the electrical connector body 5. Since the second heat diffusion layer 22 and the third heat diffusion layer 23 have a high in-plane heat diffusion coefficient, the heat will be quickly transferred to the outer third heat diffusion layer 23 along the in-plane direction of the second heat diffusion layer 22, and then quickly transferred to the upper first heat diffusion layer 21 along the in-plane direction of the third heat diffusion layer 23, and finally transferred to the heat dissipation element through the first heat diffusion layer 21. The cooling medium inside the heat dissipation element can carry away the heat transferred from the heat dissipation element mounting structure, forming an efficient heat flow transfer path of "battery cell → electrical connector body 5 → heat dissipation element mounting structure → heat dissipation element", thereby achieving efficient heat dissipation of the battery cell.

[0073] Furthermore, the heat-diffusing material also possesses a thickness thermal diffusivity, which is the material's ability to transfer heat along its thickness. It can be expressed as the heat flow rate per unit area along the thickness direction per unit time, with units of W / (m·K). The heat-diffusing material can be a material with an in-plane thermal diffusivity much greater than its thickness thermal diffusivity. This allows the heat transferred from the electrical connector body 5 to the second heat-diffusing layer 22 to be quickly transferred to the third heat-diffusing layer 23, and the heat transferred to the third heat-diffusing layer 23 to be quickly transferred to the first heat-diffusing layer 21, further improving heat dissipation efficiency.

[0074] In actual implementation, the in-plane thermal diffusivity of the thermal diffusive material is not specifically limited. For example, the in-plane thermal diffusivity of the thermal diffusive material can be above 100 W / (m·K). At this point, the thermal diffusive component 2 has a high heat transfer capacity, which can improve the heat dissipation efficiency of the battery cell.

[0075] In actual setup, the specific type of heat-diffusing material is not limited.

[0076] In the embodiments provided in this application, the heat diffusion material is graphite, and each diffusion layer of the heat diffusion component 2 can be in the form of a graphite sheet. In this way, not only can the heat diffusion component 2 achieve rapid heat transfer, but the heat diffusion component 2 is also lighter in weight, which facilitates the installation of the heat diffusion component 2 on the surface of the elastic component 1 and also helps to reduce the weight of the power battery.

[0077] Of course, in other embodiments not shown in this application, the heat diffusion material can also be superconducting graphite, and correspondingly, each heat dissipation layer of the heat diffusion component 2 can be in the form of a superconducting graphite sheet. The heat diffusion material can also be boron nitride, and correspondingly, each heat dissipation layer of the heat diffusion component 2 can be in the form of a boron nitride heat sink.

[0078] In actual setup, the thickness of the heat diffusion component 2 is not limited, as long as the heat diffusion component 2 can deform with the deformation of the elastic component 1.

[0079] In the embodiments provided in this application, the thicknesses of the first heat diffusion layer 21, the second heat diffusion layer 22, and the third heat diffusion layer 23 are all within 0.1 mm to 1.0 mm, which not only enables the heat diffusion component 2 to deform with the deformation of the elastic component 1, but also enables the heat diffusion component 2 to have a high heat dissipation capacity.

[0080] Specifically, the thicknesses of the first heat diffusion layer 21, the second heat diffusion layer 22, and the third heat diffusion layer 23 can be the same or different, and this application does not impose any restrictions on this.

[0081] It is worth mentioning that the first heat diffusion layer 21, the second heat diffusion layer 22, and the third heat diffusion layer 23 can all be as follows: Figure 6 The diagram shows only one layer, but it is also possible to set two or more layers, with no specific restrictions. When setting two or more layers, taking the first heat diffusion layer 21 as an example, each first heat diffusion layer 21 can be stacked sequentially in the vertical direction.

[0082] Please combine Figure 6 and Figure 7 It is understood that in the embodiments provided in this application, the upper surface of the heat dissipation element mounting structure is a plane.

[0083] Thus, compared to the uneven upper surface of the electrical connector 03 and the height difference between each battery cell 01 in the related technology, which makes the thickness of the thermally conductive sealant 05 uneven and varies greatly, making it difficult for the thermally conductive sealant 05 to form a flat surface on the top surface, it is difficult to ensure that the thermally conductive sealant 05 and the heat dissipation element 04 are effectively bonded, resulting in poor heat dissipation performance of the battery cell. The heat dissipation element mounting structure provided in the above embodiment of this application, due to the setting of the elastic component 1 and the setting of the upper surface of the heat dissipation element mounting structure as a plane, can provide a flat surface for effective bonding with the heat dissipation element when the heat dissipation element is installed. When the heat dissipation element mounting structure is compressed downward, the heat dissipation element can always maintain effective bonding with the heat dissipation element mounting structure, thereby further improving the heat dissipation performance of the battery cell.

[0084] Furthermore, the thickness of the heat dissipation element mounting structure at each point on the first upper surface 1a, that is, the distance from each point on the first upper surface 1a to the first lower surface 1b, can be equal or unequal, and there is no specific restriction.

[0085] In this embodiment, the distances from each point on the first upper surface 1a to the first lower surface 1b are equal, thus the lower surface of the heat dissipation element mounting structure is also planar. Therefore, when the heat dissipation element mounting structure is compressed downwards, the thickness uniformity of the heat dissipation element mounting structure can be effectively ensured, and the degree of fit between the heat dissipation element and the heat dissipation element mounting structure, and between the heat dissipation element mounting structure and the electrical connector body 5, can be more effectively guaranteed, thereby further improving the heat dissipation performance of the battery cell.

[0086] In actual installation, the heat dissipation element mounting structure provided in this application embodiment can be appropriately conformed to the shape of the electrical connector body 5. Specifically, for example... Figure 6 and Figure 8 As shown, the heat dissipation element mounting structure has a first clearance hole 41 extending vertically. The number of first clearance holes 41 and positioning slots 51 are the same and correspond one-to-one. In use, the first clearance holes 41 can communicate with the positioning slots 51, and both can avoid the welding fixture used for electrode welding. The heat dissipation element mounting structure also has a second clearance hole 42 extending vertically. The number of second clearance holes 42 and positioning holes 52 are the same and correspond one-to-one. In use, the second clearance holes 42 can communicate with the positioning holes 52 to avoid the fasteners used for mounting and positioning the electrical connector body 5. Thus, after the heat dissipation element mounting structure is installed on the electrical connector body 5, it will not affect the installation of the electrical connector body 5 on the battery cell.

[0087] Specifically, the first clearance hole 41 corresponds to a first inner surface 41a, and the first inner surface 41a can also be provided with a third heat diffusion layer 23, or as follows: Figure 6 The third heat diffusion layer 23 is not shown, but there are no specific restrictions; the second clearance hole 42 corresponds to the second inner surface 42a, and the second inner surface 42a can also be provided with the third heat diffusion layer 23, or as shown in the figure. Figure 6 The third heat diffusion layer 23 is not shown, and there are no specific restrictions.

[0088] Furthermore, the first heat diffusion layer 21 can completely cover the first upper surface 1a of the elastic member 1, and the second heat diffusion layer 22 can completely cover the first lower surface 1b of the elastic member 1 to improve heat exchange efficiency; the third heat diffusion layer 23 can completely cover the outer surface 1c of the elastic member 1, so that the second heat diffusion layer 22 and the first heat diffusion layer 21 can be connected through the third heat diffusion layer 23 at the entire edge position, so that the heat transfer efficiency from the second heat diffusion layer 22 to the first heat diffusion layer 21 in the vertical direction is high. Of course, it can also be as follows: Figure 6The diagram shows only the planar portion of the outer surface 1c of the elastic member 1, while the third heat diffusion layer 23 is not provided at the bending position of the elastic member 1, i.e., the curved portion of the outer surface 1c. In this way, the effective transfer of heat from the second heat diffusion layer 22 to the first heat diffusion layer 21 can be ensured, and the bending position where it is difficult to install the third heat diffusion layer 23 can be avoided. This application does not impose any restrictions on this.

[0089] In actual setup, the connection method between the heat dissipation element mounting structure and the electrical connector body 5 is not limited.

[0090] like Figure 6 and Figure 7 As shown, in the embodiments provided in this application, the heat dissipation element mounting structure further includes a first adhesive layer 31, the first heat diffusion layer 21 has a second upper surface 21a, the first adhesive layer 31 is disposed on the second upper surface 21a, and the first heat diffusion layer 21 is bonded to the heat dissipation element through the first adhesive layer 31; the heat dissipation element mounting structure further includes a second adhesive layer 32, the second heat diffusion layer 22 has a second lower surface 22a, the second adhesive layer 32 is disposed on the second lower surface 22a, and the second heat diffusion layer 22 is bonded to the electrical connector body 5 through the second adhesive layer 32.

[0091] Therefore, compared to the related technologies where thermally conductive sealant 05 is applied between the electrical connector 03 and the heat dissipation element 04, the process is more complex. Moreover, due to the small area and complex structure of the upper surface of the electrical connector 03, the construction is more difficult. In addition, a certain amount of time is required for the thermally conductive sealant 05 to cure, which will slow down the power battery assembly process. The heat dissipation element mounting structure provided in the above embodiment of this application does not require additional application of thermally conductive sealant. Instead, the heat diffusion component 2 is pre-assembled with the elastic component 1, and adhesive layers are respectively set on the upper and lower surfaces of the heat diffusion component 2. When in use, it is only necessary to bond the heat dissipation element mounting structure to the electrical connector body 5 and the heat dissipation element respectively. The process is simpler and easier to construct, and no additional curing time is required, which can improve the installation efficiency of the heat dissipation element and thus improve the efficiency of power battery assembly.

[0092] Specifically, the first adhesive layer 31 and the second adhesive layer 32 can be double-sided adhesive, which makes it more convenient to install the heat dissipation element mounting structure on the electrical connector body 5 and to install the heat dissipation element on the heat dissipation element mounting structure, thereby further improving the installation efficiency of the heat dissipation element.

[0093] Furthermore, the heat diffusion component 2 can be directly wrapped around the elastic component 1, or it can be bonded to the elastic component 1; there are no specific limitations. For example, the heat dissipation element mounting structure also includes a third adhesive layer (not shown in the figure), through which the heat diffusion component 2 and the elastic component 1 are bonded. In this case, the third adhesive layer can be an adhesive directly applied to the elastic component 1 or the heat diffusion component 2, or it can be a double-sided adhesive that is easy to handle.

[0094] Furthermore, when setting the first adhesive layer 31, the second adhesive layer 32, and the third adhesive layer, adhesive materials with high thermal conductivity can be selected as much as possible. For example, double-sided adhesive with a thermal conductivity of 0.6 W / (mK) or higher can be selected, so that the heat dissipation capacity of the heat dissipation component mounting structure with these adhesive layers is high.

[0095] It is worth mentioning that when there are two or more layers of the first heat diffusion layer 21, the second heat diffusion layer 22 and the third heat diffusion layer 23, taking the first heat diffusion layer 21 as an example, the layers of the first heat diffusion layer 21 can also be connected by adhesive, specifically by using double-sided adhesive.

[0096] In actual installation, the heat diffusion material used in the fabrication of the heat diffusion component 2 can be either an insulating material or a non-insulating material. When the heat diffusion material is non-insulating, an insulating material can be coated onto the outer surface of the heat diffusion component 2; this application does not impose any restrictions on this. Similarly, the elastic material used in the fabrication of the elastic component 1 can be either an insulating material or a non-insulating material. When the elastic material is non-insulating, an insulating material can be coated onto the outer surface of the elastic component 1; this application does not impose any restrictions on this. The aforementioned insulating material is an electrically insulating material, and its specific type is not limited; for example, it can be a PI film.

[0097] In the embodiments provided in this application, an electrical connector is also provided. The electrical connector includes an electrical connector body 5 and a heat dissipation element mounting structure as described in all the above embodiments; the heat dissipation element mounting structure is disposed on the upper surface of the electrical connector body 5. Since the electrical connector provided in this application includes the heat dissipation element mounting structure as described in all the above embodiments, it also possesses all the beneficial effects of the heat dissipation element mounting structure as described in all the above embodiments, which will not be elaborated upon here.

[0098] In the embodiments provided in this application, a power battery is also provided. The power battery includes a heat dissipation element, electrical connectors as described in all the above embodiments, and a plurality of battery cells. Adjacent battery cells are connected by an electrical connector body 5, and the heat dissipation element is disposed on the upper surface of the heat dissipation element mounting structure. Since the power battery provided in this application includes the electrical connectors as described in all the above embodiments, it also has all the beneficial effects of the electrical connectors as described in all the above embodiments, which will not be described in detail here.

[0099] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the apparatus and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A heat dissipation element mounting structure, wherein the heat dissipation element mounting structure is used to mount a heat dissipation element onto an electrical connector body (5), characterized in that, The heat dissipation element mounting structure includes an elastic component (1) and a heat diffusion component (2). The elastic component (1) has a first upper surface (1a) and a first lower surface (1b), and the elastic component (1) is made of an elastic material; The heat diffusion component (2) includes a first heat diffusion layer (21) and a second heat diffusion layer (22). The first heat diffusion layer (21) is disposed on the first upper surface (1a), and the second heat diffusion layer (22) is disposed on the first lower surface (1b). The first heat diffusion layer (21) and the second heat diffusion layer (22) are thermally connected. The heat diffusion component (2) is made of a heat diffusion material.

2. The heat dissipation element mounting structure according to claim 1, characterized in that, The elastic member (1) also has an outer surface (1c), and the heat diffusion member (2) further includes a third heat diffusion layer (23). The first upper surface (1a) and the first lower surface (1b) are connected by the outer side surface (1c), and the outer side surface (1c) is provided with the third heat diffusion layer (23). The first heat diffusion layer (21) and the second heat diffusion layer (22) are connected by the third heat diffusion layer (23).

3. The heat dissipation element mounting structure according to claim 2, characterized in that, The distance from each point on the first upper surface (1a) to the first lower surface (1b) is equal.

4. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The upper surface of the electrical connector body (5) is provided with a positioning groove (51), and the heat dissipation element mounting structure has a first clearance hole (41) that runs through the vertical direction. The number of the first clearance holes (41) and the positioning groove (51) are the same and they correspond one-to-one; and / or, The electrical connector body (5) has a positioning hole (52) that runs through the vertical direction, and the heat dissipation element mounting structure has a second clearance hole (42) that runs through the vertical direction. The number of the second clearance hole (42) and the positioning hole (52) are the same and they correspond one-to-one.

5. The heat dissipation element mounting structure according to claim 4, characterized in that, The heat diffusion component (2) further includes a third heat diffusion layer (23), through which the first heat diffusion layer (21) and the second heat diffusion layer (22) are connected; The first clearance hole (41) has a first inner side surface (41a), and the first inner side surface (41a) is provided with the third heat diffusion layer (23); and / or, the second clearance hole (42) has a second inner side surface (42a), and the second inner side surface (42a) is provided with the third heat diffusion layer (23).

6. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The heat dissipation element mounting structure further includes a first adhesive layer (31), the first heat diffusion layer (21) has a second upper surface (21a), the first adhesive layer (31) is disposed on the second upper surface (21a), and the first heat diffusion layer (21) is bonded to the heat dissipation element through the first adhesive layer (31); And / or, The heat dissipation element mounting structure further includes a second adhesive layer (32), the second heat diffusion layer (22) having a second lower surface (22a), the second adhesive layer (32) being disposed on the second lower surface (22a), and the second heat diffusion layer (22) being bonded to the electrical connector body (5) through the second adhesive layer (32); and / or, The heat dissipation element mounting structure also includes a third adhesive layer, through which the heat diffusion component (2) and the elastic component (1) are bonded together.

7. The heat dissipation element mounting structure according to claim 6, characterized in that, The first adhesive layer (31) is double-sided adhesive; and / or, the second adhesive layer (32) is double-sided adhesive; and / or, the third adhesive layer is double-sided adhesive.

8. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The in-plane thermal diffusivity of the thermal diffusive material is above 100 W / (m·K).

9. The heat dissipation element mounting structure according to claim 8, characterized in that, The heat-diffusing material is graphite, superconducting graphite, or boron nitride.

10. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The thickness of the first heat diffusion layer (21) is 0.1 mm to 1.0 mm; and / or, the thickness of the second heat diffusion layer (22) is 0.1 mm to 1.0 mm; and / or, the heat diffusion component (2) further includes a third heat diffusion layer (23), the first heat diffusion layer (21) and the second heat diffusion layer (22) are connected through the third heat diffusion layer (23), and the thickness of the third heat diffusion layer (23) is 0.1 mm to 1.0 mm.

11. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The heat-diffusing material is an insulating material; and / or, the outer surface of the heat-diffusing component (2) is covered with an insulating material; and / or, the elastic material is an insulating material; and / or, the outer surface of the elastic component (1) is covered with an insulating material.

12. The heat dissipation element mounting structure according to any one of claims 1 to 3, characterized in that, The elastic material is foam.

13. An electrical connector, characterized in that, The electrical connector includes the electrical connector body (5) and the heat dissipation element mounting structure according to any one of claims 1 to 12; The heat dissipation element mounting structure is located on the upper surface of the electrical connector body (5).

14. A power battery, characterized in that, The power battery includes the heat dissipation element, the electrical connector as described in claim 13, and a plurality of battery cells; The two adjacent cells are connected by the electrical connector body (5), and the heat dissipation element is disposed on the upper surface of the heat dissipation element mounting structure.

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