Heat conduction member and battery pack

Abstract

The present application relates to the technical field of batteries, and specifically provides a heat conduction member and a battery. The heat conduction member comprises a flexible core capable of elastically deforming; and a heat conduction cladding shell wrapping the flexible core, wherein accommodating grooves used for accommodating heat production members are formed in the heat conduction member, and each accommodating groove at least has a side wall and a bottom wall. The heat conduction member is lightweight, and has both heat conduction and protective cushioning effects, and when applied to batteries, the heat conduction member not only protects battery cells but also enables effective heat conduction, facilitating heat dissipation of the battery cells, and achieving waterproof, protection and lightweight configurations of the batteries while optimizing heat dissipation structures of the batteries.

Description

Thermal conductors and battery packs Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat conducting member and a battery pack. Background Art

[0002] Many electronic products, such as drones, vacuum cleaners, power tools, and vehicles, require high battery power. High-power charging and discharging generate significant heat in the battery cells, requiring timely heat dissipation. Otherwise, high temperatures can severely impact battery performance, lifespan, and safety. At the same time, batteries need to be lightweight to facilitate their use in various devices.

[0003] Summary of the Invention

[0004] In view of this, the present application is dedicated to providing a heat-conducting part that is lightweight, has heat-conducting and protective buffering functions, and is used in batteries. It can conduct heat well while protecting the battery cells, and facilitate the heat dissipation of the battery cells. While optimizing the battery heat dissipation structure, it also facilitates the battery to be waterproofed, protected and lightweight.

[0005] On one hand, the present application provides a heat conducting member, comprising:

[0006] Flexible core, elastically deformable;

[0007] a heat-conductive covering shell, wrapping the flexible core;

[0008] Furthermore, a receiving groove for receiving the heat generating element is formed on the heat conducting element, and the receiving groove includes at least a side wall and a bottom wall.

[0009] In a possible implementation manner, the accommodating grooves are provided on two opposite sides of the heat conducting member in the thickness direction.

[0010] In a possible embodiment, the heat conductor includes a flat portion and an abutment portion located at one end or both ends of the flat portion, the abutment portion protrudes from one side or both sides in the thickness direction of the flat portion, the surface of the flat portion forms the bottom wall of the accommodating groove, and the area where the abutment portion protrudes from the flat portion forms the side wall of the accommodating groove.

[0011] In a possible implementation manner, the heat conducting member includes two spaced-apart and opposite flat portions, and an abutting portion connecting the two flat portions, wherein the abutting portion and the two flat portions enclose the accommodating groove.

[0012] In a possible implementation, the heat conducting element has a bonding area on its surface.

[0013] In a possible implementation manner, the thermally conductive covering shell and the flexible core are bonded by colloid.

[0014] In a possible implementation, the heat-conductive coating shell is graphite, and the flexible core is foam or silicone.

[0015] In a possible implementation manner, the thickness of the single-layer shell of the heat-conductive covering shell is 0.1-1.0 mm.

[0016] On the other hand, the present application further provides a battery, comprising:

[0017] A battery housing and a battery cell module located in the battery housing, wherein the battery cell module includes a plurality of arranged battery cells;

[0018] The battery core heat conductor is the heat conductor as described above, which is arranged in the battery core module. The accommodating groove accommodates at least one battery core unit, and the abutting portion of the battery core heat conductor is located beside the battery core unit and is in thermal contact with the battery shell.

[0019] In a possible embodiment, a plurality of the battery core heat conductive members are provided, one battery core heat conductive member and the battery core monomer accommodated therein form a battery core unit, and the battery core module includes a plurality of the battery core units arranged in an array.

[0020] In a possible embodiment, any one or any combination of a first heat conducting member, a second heat conducting member, and a third heat conducting member is further provided; wherein,

[0021] The abutment portion of the battery cell heat conductor is located on the first side and / or second side opposite to the battery cell module and is connected to the battery shell. The first heat conductor is filled between the third side of the battery cell module and the battery shell. The second heat conductor is filled between the fourth side of the battery cell module and the battery shell. The third heat conductor is laid between the bottom of the battery cell module and the battery shell.

[0022] In a possible implementation, the first heat-conducting member is a graphite sheet, silica gel, or foam, or includes a flexible core and a heat-conducting shell wrapping the flexible core.

[0023] In a possible implementation, the second heat-conducting member is a graphite sheet, silica gel, or foam, or includes a flexible core and a heat-conducting shell wrapping the flexible core.

[0024] In a possible implementation, the third heat-conducting member is a graphite sheet, silica gel, or foam, or includes a flexible core and a heat-conducting shell wrapping the flexible core.

[0025] In a possible implementation, a heat sink is provided on the battery housing in an area abutting against the battery core heat conductor, and the heat sink includes a bottom plate and a plurality of fins provided on the bottom plate.

[0026] In a possible embodiment, the heat conductive member includes two spaced-apart and opposite flat portions, and an abutting portion connecting the two flat portions, and the abutting portion and the two flat portions enclose the accommodating groove, and the battery pack is further provided with a fourth heat conductive member, the abutting portion of the battery core heat conductive member is located on the first side surface of the battery core module, the fourth heat conductive member is located on the second side surface of the battery core module opposite to the first side surface, the fourth heat conductive member is attached to the surface of the battery core module, and the dimension O of the fourth heat conductive member in the arrangement direction of the battery core monomers satisfies: O value ≥ battery core monomer thickness C value * number of battery core monomers + thermal conductive coating shell single-layer shell thickness G value * number of battery core monomers / 2 + flexible core thickness Q value * (number of battery core monomers / 2-1);

[0027] The battery cell includes a main body and a tab, and the fourth heat conductor has a larger dimension in an extending direction of the tab than that of the main body in the same direction.

[0028] The thermal conductive member provided in the present application has a flexible core with elastic deformation ability and a thermal conductive coating shell that wraps the flexible core, which can be easily set on components that need protection and heat dissipation, such as being filled between the battery module and the battery shell and / or set between different battery cells. The flexible core has elastic deformation ability, can buffer impact and protect the battery cell, and the thermal conductive coating shell can conduct heat and conduct the heat of the battery cell outward; at the same time, the thermal conductive member is provided with a receiving groove, which contacts the battery cell that needs heat dissipation over a large area, quickly dissipates the heat of the battery cell, has good thermal conductivity, and is light in weight compared to all-metal thermal conductive members of the same thickness as the thermal conductive member, which is convenient for lightweight setting of the battery and can also be used in batteries that require sealing and waterproofing. Compared with the existing technology of heat dissipation through ventilation, which is not conducive to waterproofing, the thermal conductive member provided in the present application, on the basis of the thermal conductive function, also has waterproofing, buffering and protection functions. While optimizing the battery heat dissipation structure and heat dissipation performance, it also facilitates waterproofing, protection and lightweight setting of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a heat conducting member from a first angle in one embodiment of the present application;

[0030] FIG2 is a schematic cross-sectional view of a heat conducting member in one embodiment of the present application;

[0031] FIG3 is a schematic diagram of a heat conducting member from a second angle according to an embodiment of the present application;

[0032] FIG4 is a schematic diagram of a heat conducting member in another embodiment of the present application;

[0033] FIG5 is a schematic diagram showing the arrangement of a battery core heat conductor and a battery core module in one embodiment of the present application;

[0034] FIG6 is a schematic diagram showing the arrangement of a battery core heat conductor and a battery core module in another embodiment of the present application;

[0035] FIG7 is a schematic diagram showing the arrangement of the first, second and third heat conducting members in one embodiment of the present application;

[0036] FIG8 is a schematic diagram showing the arrangement of a fourth heat conducting member in another embodiment of the present application;

[0037] FIG9 is a schematic diagram showing the dimensions of a battery cell in different directions according to an embodiment of the present application;

[0038] FIG10 is a schematic diagram showing the composition of a battery in one embodiment of the present application.

[0039] Reference numerals:

[0040] 1. Battery core thermal conductor; 101. Flat portion; 102. Abutment portion; 103. Accommodation groove; 104. Adhesive area; 11. Thermally conductive coating; 12. Flexible core; 2. Battery core module; 21. Battery cell; 3. Battery housing; 31. Heat sink; 4. First thermal conductor; 5. Second thermal conductor; 6. Third thermal conductor; 7. Fourth thermal conductor. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] First, it's important to note that spatially relative terms, such as "horizontal," are intended to correspond to the product's actual orientation in use and to accommodate the orientation of the accompanying drawings for ease of description. When the orientation of the drawings changes, or the product's actual orientation in use changes, these spatially relative terms should be interpreted accordingly and are not intended to be limited to a single orientation.

[0043] Please refer to Figures 1-10. The present application provides a heat-conducting part, including a heat-conducting covering shell 11 and a flexible core 12. The heat-conducting covering shell 11 has a hollow inner cavity, and the flexible core 12 has elastic deformation ability and is filled in the hollow inner cavity. In other words, the heat-conducting covering shell 11 wraps the flexible core 12 to form a heat-conducting component. The heat-conducting part can not only conduct heat, but also has elastic deformation ability, which plays a buffering and protective role. When the flexible core 12 also has a high thermal conductivity coefficient, the overall thermal conductivity of the heat-conducting part is high. At the same time, a receiving groove 103 is provided on the heat-conducting part for accommodating or wrapping a heat-generating part, that is, an object that needs to dissipate heat, such as a battery cell 21. In this way, the contact area with the heat-dissipating object can be increased, the heat transfer efficiency can be improved, and the heat dissipation effect can be improved. The receiving groove 103 includes at least a side wall and a bottom wall, and can contact at least two different surfaces of a heat-generating part such as a battery cell 21.

[0044] For example, when the heat conductor is set in the battery pack, the heat conductor can be set in the battery module 2 and in contact with the battery cell 21. For example, if at least one battery cell 21 is wrapped by the receiving groove 103, then part of it (the bottom wall or side wall of the receiving groove 103) will be in contact with the surface of the battery cell 21 in the thickness direction, and part of it (the bottom wall and side wall of the receiving groove 103) will be in contact with the side surface of the battery cell 21 in the length or width direction. Through large-area contact, the heat of the battery cell 21 can be conducted outward in large quantities and quickly, with high heat transfer efficiency and high heat dissipation performance, and the heat of the battery cell can be quickly dissipated. And because the heat conductor is flexible, it is easy to fill in the gap in the battery pack, and it can be easily made into models of various shapes and sizes, which is convenient for matching battery packs of different specifications. It has good adaptability and can buffer impacts, play a role in shock absorption and buffering, and protect the battery cell. At the same time, compared with all-metal thermal conductors of the same thickness as the thermal conductors, it is light in weight, which facilitates lightweight settings of the battery pack and can also be used in battery packs that require sealing and waterproofing. Compared with the existing technology of heat dissipation through ventilation, it is not conducive to waterproofing. The thermal conductor provided in this application has multiple functions of waterproofing, heat dissipation, and buffering protection. While optimizing the heat dissipation structure and heat dissipation performance of the battery pack, it also facilitates waterproofing, protection and lightweight settings of the battery pack.

[0045] The entire thermally conductive element is easily placed between the cell module 2 and the battery housing 3, effectively protecting the cells while also rapidly conducting heat away from the cells. The element can also be easily sized and shaped, such as wrapping around the cells 21 in the cell module 2, fully protecting each cell 21 and rapidly conducting heat away from the housing over a wide area and in all directions, resulting in high heat dissipation performance.

[0046] The flexible core 12 can be a sponge, such as foam, or silicone, or other flexible materials such as plastics, plastic glue, etc. The flexible core 12 material is relatively soft, has good compression performance, and a wide range of adjustable thickness, making it suitable for filling cavities. Flexible parts with higher thermal conductivity can also be selected, such as thermally conductive silicone. Thermally conductive silicone has good thermal conductivity and insulation properties, and has natural viscosity on both sides. It can be tightly filled in the thermally conductive coating shell 11, has strong operability and maintainability, and good thermal stability. The flexible core 12 is both flexible and thermally conductive. Combined with the thermally conductive coating shell 11, it can quickly conduct heat and dissipate heat.

[0047] The thermally conductive cover 11 can be made of graphite, a graphite sheet, or aluminum. It is lightweight and offers high thermal conductivity. The thickness of the single-layer thermally conductive cover 11 can be 0.1-1.0 mm, ensuring good strength and thermal conductivity while avoiding being too thick to be easily installed within the battery pack.

[0048] The thermally conductive coating shell 11 and the flexible core 12 can be bonded together by a colloid. In this way, the flexible core 12 is not only filled in the inner cavity of the coating shell, but also bonded by the colloid, thereby enhancing the connection stability and tightness and preventing the flexible core 12 from falling out. The colloid can be a thermally conductive adhesive, which can also enhance the thermal conductivity.

[0049] The receiving groove 103 on the heat conducting member has at least a bottom wall and a side wall, that is, the receiving groove 103 can be L-shaped or U-shaped. For example, the heat conducting member includes a flat portion 101 and an abutting portion 102 located at one end of the flat portion 101. The abutting portion 102 and the flat portion 101 can be vertically connected, and the abutting portion 102 protrudes from one side or both sides in the thickness direction of the flat portion 101. The heat conducting member is L-shaped or can form two L-shaped portions. The surface of the flat portion 101 forms the bottom wall of the receiving groove 103, and the area where the abutting portion 102 protrudes from the flat portion 101 forms the side wall of the receiving groove 103.

[0050] In some embodiments, two opposite sides of the heat conducting member in the thickness direction have inwardly recessed receiving grooves 103 , so that the battery cells 21 can be embedded in both sides of the heat conducting member.

[0051] As shown in Figures 1 and 2, the thermal conductor includes a central flat portion 101 and abutment portions 102 located at either end of the flat portion 101. The abutment portions 102 are taller than the flat portion 101 and protrude from both sides of the flat portion 101 in the thickness direction, giving the thermal conductor an overall H-shaped or H-like shape. The surface of the flat portion 101 forms the bottom wall of the receiving groove 103, while the area where the abutment portions 102 protrude from the flat portion 101 forms the side walls of the receiving groove 103. When the thermal conductor is connected to the battery cell 21, at least one battery cell 21 is embedded in each receiving groove 103. The bottom wall of the receiving groove 103, i.e., the flat portion 101, contacts the surface of the battery cell 21 in the thickness direction, while the side walls of the receiving groove 103, i.e., the abutment portions 102, contact the side surfaces of the battery cell 21 in the length or width direction. In this way, battery cells 21 can be embedded on both sides of the thermal conductor. One thermal conductor can protect and conduct heat to at least two groups of battery cells 21. The contact area between the battery cells 21 and the thermal conductor is large, the heat transfer area is wide, and heat can be dissipated quickly.

[0052] Alternatively, in some embodiments, as shown in FIG4 , the thermal conductor includes two spaced-apart and opposing flat portions 101, and an abutting portion 102 connecting the two flat portions 101. The abutting portion 102 and the two flat portions 101 enclose a receiving groove 103 that wraps at least one battery cell 21. The thermal conductor has an overall U-shaped or U-like structure, with the flat portions 101 forming the side walls of the receiving groove 103 and the abutting portion 102 forming the bottom wall of the receiving groove 103. When the thermal conductor wraps around the battery cell 21, the flat portions 101 contact the surface of the battery cell 21 in the thickness direction, and the abutting portion 102 contacts the side surface of the battery cell 21 in the length or width direction.

[0053] In some embodiments, the surface of the thermally conductive member has a bonding area 104, which is provided with a bonding member. The bonding member can specifically be a colloid, such as thermally conductive adhesive. By providing the thermally conductive adhesive, the two sides of the thermally conductive member can be bonded to the heat-generating and heat-dissipating objects (such as the battery cell 21 and the battery housing 3), respectively. This not only enhances the stability and tightness of the connection, facilitates heat conduction, but also utilizes the thermal conductivity of the thermally conductive adhesive to better transfer heat and improve heat dissipation.

[0054] The bonding area 104 may be distributed over a single side surface of the thermally conductive covering shell 11, or may be smaller than the single side surface of the thermally conductive covering shell 11. When the area is smaller than the single side surface of the thermally conductive covering shell 11, there may be at least two bonding areas 104, which are arranged along the length or width direction of the thermally conductive covering shell 11.

[0055] The embodiment of the present application also provides a battery pack, which includes a battery shell 3 and a battery cell module 2 located in the battery shell 3, and also includes a battery cell heat conductor 1, which is the heat conductor described in the above embodiment. The battery cell heat conductor 1 is arranged in the battery cell module 2, and its receiving groove 103 accommodates at least one battery cell 21. The abutment portion 102 of the battery cell heat conductor 1 is located next to the battery cell 21 and is in heat-conducting contact with the battery shell 3. In this way, the battery cell heat conductor 1 can contact the battery cell 21 over a large area, quickly conduct the heat of the battery cell module 2 to the battery shell 3 and dissipate the heat to the outside of the battery pack, and has good heat dissipation performance. Compared with only providing a heat-conducting component on the outside of the battery cell module 2, in the present application, as shown in Figures 5 and 6, the battery cell heat conductor 1 has a portion extending into the interior of the battery cell module 2, wrapping the battery cell 21, and contacting the battery cell 21 over a large area, and also quickly conducts the heat of each battery cell 21 to the outside of the battery cell module 2, significantly improving the heat dissipation. Thermal performance; and the battery cell heat conductor 1 can protect the battery cell module 2. Compared with only setting foam around the battery cell module 2 to affect the heat dissipation of the battery cell module 2, the battery pack provided by the present application can protect the battery cell module 2 while being able to quickly and efficiently conduct the heat inside the battery cell module 2 to the outside of the shell, thereby improving the heat dissipation performance; and compared with setting metal heat conductors around the battery cell module 2, the battery pack of the present application is light in weight, convenient for lightweight setting, and also convenient for sealing and waterproof setting.

[0056] Specifically, the battery cell thermal conductive member 1 can be a single member, such as one that encloses all battery cells 21. Alternatively, the battery cell module 2 includes multiple battery cells 21 arranged in an array, and multiple battery cell thermal conductive members 1 are also provided, arranged in the same direction as the battery cells 21. The receiving groove 103 of the battery cell thermal conductive member 1 accommodates at least one battery cell 21. A battery cell thermal conductive member 1 and the battery cell 21 it accommodates form a battery cell unit, and the battery cell module 2 includes multiple battery cell units arranged in an array.

[0057] The area of ​​the battery cell heat conductor 1 located on the side of the battery cell module 2, such as the abutment portion 102, is in thermal contact with the battery housing 3, such as directly abutting against it. This can not only quickly transfer the heat of the battery cell module 2 to the battery housing 3 and then dissipate it to the outside of the battery pack, but also provide protection between the battery housing and the battery cell module 2, eliminating the need for additional protective components.

[0058] The battery housing 3 is also provided with a heat sink 31. Specifically, the area of ​​the battery housing 3 that abuts the battery cell thermal conductor 1 is provided with a heat sink 31. The heat sink 31 comprises a base plate and multiple fins disposed on the base plate. This enhances the heat dissipation performance of the battery pack and quickly dissipates heat from the battery cell module 2, which is transferred from the battery cell thermal conductor 1, to the outside of the battery pack.

[0059] When the battery cell thermal conductive member 1 comprises a flat portion 101 and two abutting portions 102, such as in an H-shape, as shown in FIG5 , each flat portion 101 has a battery cell 21 in the thickness direction (the direction in which the battery cells 21 are arranged), while the abutting portions 102 are located on the sides of the battery cells 21 and contact the battery housing 3. In this way, all areas of the battery cell thermal conductive member 1 are in close contact with the battery cells 21, expanding the heat conduction area, efficiently transferring heat from each battery cell 21, and enhancing the heat dissipation efficiency of the battery cell module 2.

[0060] In such embodiments, the battery cell heat conducting member 1 includes a flat portion 101 and two abutting portions 102, such as an H-shape, as shown in FIG7 . In some embodiments, the battery pack is further provided with any one or any combination of a first heat conducting member 4, a second heat conducting member 5, and a third heat conducting member 6.

[0061] The battery module 2 has a first side surface, a second side surface, a third side surface, and a fourth side surface. Two opposite sides in the arrangement direction of the battery cells 21 are marked as the third side surface and the fourth side surface, and the other two opposite sides are marked as the first side surface and the second side surface.

[0062] The abutting portion 102 of the battery cell heat conductor 1 is located on the first and / or second side surfaces opposite the battery cell module 2 and in contact with the battery housing 3. The first heat conductor 4 is laid on the third side surface of the battery cell module 2, filling the space between the third side surface of the battery cell module 2 and the battery housing 3. The second heat conductor 5 is laid on the fourth side surface of the battery cell module 2, filling the space between the fourth side surface of the battery cell module 2 and the battery housing 3. The third heat conductor 6 is laid below the battery cell module 2 and in contact with the battery cell module 2, filling the space between the bottom of the battery cell module 2 and the battery housing 3.

[0063] In a preferred embodiment, the battery pack includes a first heat conducting member 4, a second heat conducting member 5, and a third heat conducting member 6. Thus, heat conducting members are provided on the periphery and bottom surface of the battery module 2, effectively transferring heat from the battery module 2 to the outside of the housing over a comprehensive and large area, thereby improving the heat dissipation performance and efficiency of the battery module 2.

[0064] As shown in the first and second sides, the heat of the battery cell module 2 is transferred from the flat portion 101 of the battery cell heat conductor 1 to the abutment portion 102, and the abutment portion 102 itself also absorbs the heat of the battery cell unit. At the same time, the abutment portion 102 transfers the heat to the battery shell 3, and the battery shell 3 dissipates the heat to the outside of the battery pack.

[0065] On the third side, the heat of the battery cell module 2 is transferred to the first heat conducting member 4 , the first heat conducting member 4 transfers the heat to the battery housing 3 , and the battery housing 3 dissipates the heat to the outside of the battery pack.

[0066] On the fourth side, the heat of the battery cell module 2 is transferred to the second heat conducting member 5, and the second heat conducting member 5 transfers the heat to the battery housing 3, and the battery housing 3 dissipates the heat to the outside of the battery pack.

[0067] On the bottom surface of the battery cell module 2 , the heat of the battery cell module 2 is transferred to the third heat conducting member 6 , and the third heat conducting member 6 transfers the heat to the bottom plate of the battery housing 3 , and the battery housing 3 dissipates the heat outside the battery pack.

[0068] The first heat-conducting member 4, the second heat-conducting member 5, and the third heat-conducting member 6 can all be in the form of sheets or strips. The first heat-conducting member 4, the second heat-conducting member 5, and the third heat-conducting member 6 can all be graphite sheets, thermally conductive silicone, or foam, or they all include a flexible core and a thermally conductive shell wrapping the flexible core (the flexible core is a flexible component such as foam or thermally conductive silicone, and the thermally conductive shell is a thermally conductive component such as a graphite shell or an aluminum shell), that is, a structure similar to the above-mentioned battery core thermal conductive member 1, which can not only dissipate heat, but also protect the battery core.

[0069] When the battery cell thermal conductive part 1 includes two flat portions 101 and an abutting portion 102 and is U-shaped, each battery cell thermal conductive part 1 wraps at least one battery cell 21, and at least one battery cell 21 can be arranged between any two adjacent battery cell thermal conductive parts 1, as shown in Figure 8, then the two flat portions 101 of each battery cell thermal conductive part 1 are inserted between two adjacent battery cell monomers 21 and are connected to the battery cell monomers 21, and the abutting portion 102 is arranged along the arrangement direction of the battery cell monomers 21, with one side connected to the side of the wrapped battery cell monomer 21 and the other side connected to the battery shell 3.

[0070] In this embodiment, the battery pack may include, in addition to the aforementioned first, second, and third thermal conductors 4, 5, and 6, a fourth thermal conductor 7. As shown in Figure 8, in this embodiment, the abutment portion 102 of the cell thermal conductor 1 is located on the first side of the cell module 2, contacting the battery casing 3. Since the cell thermal conductor 1 is not located on the second side of the cell module 2, a fourth thermal conductor 7 may be provided on the second side of the cell module 2. The fourth thermal conductor 7 is positioned on the second side of the cell module 2, filling the gap between the second side of the cell module 2 and the battery casing 3. The first thermal conductor 4 is positioned on the third side of the cell module 2, filling the gap between the third side of the cell module 2 and the battery casing 3. The second thermal conductor 5 is positioned on the fourth side of the cell module 2, filling the gap between the fourth side of the cell module 2 and the battery casing 3. The third thermal conductor 6 is positioned below the cell module 2, contacting the cell module 2 and filling the gap between the lower side of the cell module 2 and the battery casing 3.

[0071] In this type of embodiment, the fourth heat-conducting member 7 is in the form of a sheet, adhered to the second side surface of the battery cell module 2, and can cover the second side surface area of ​​the main body of the battery cell module 2. As shown in FIG9 , in the direction in which the tabs extend or extend, the battery cell 21 includes a main body and a portion of the tab extending outside the main body. The main body has a dimension B in this direction, while the fourth heat-conducting member 7 has a dimension P in this direction. The thickness of the battery cell 21 (the thickness direction is consistent with the arrangement direction of the battery cell) has a dimension C. The dimension of the fourth heat-conducting member 7 in the arrangement direction of the battery cell is O, and the P value is greater than the B value, and the O value is ≥ the battery cell thickness C value * the number of battery cells + the thickness G value of the single-layer shell of the thermally conductive coating of the battery cell thermal conductive member * the number of battery cells / 2 + the thickness Q value of the flexible core of the battery cell thermal conductive member * (the number of battery cells / 2-1). In this way, the fourth heat conducting member 7 can cover the surface of the second side of the main body of the battery cell module 2, effectively and comprehensively protecting the battery cell module and preventing the battery cell module from being scratched or punctured by the shell.

[0072] The dimensions of the first heat conductor 4 and the second heat conductor 5 in the extension direction of the tabs are also larger than the dimension B of the main body of the battery cell 21 in this direction, and the dimensions in the arrangement direction of the positive and negative tabs of the battery cell 21 are not smaller than the dimension A of the battery cell 21 in this direction.

[0073] The dimension of the battery core heat conducting member 1 in the direction in which the tabs extend does not exceed the dimension B of the main body of the battery core unit 21 in the same direction.

[0074] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0075] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the accompanying drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, or configured in any manner. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0076] It should also be noted that in the devices and equipment of the present application, the components can be decomposed and / or reassembled, and such decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0077] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0078] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0079] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A heat conducting member, characterized in that: include: A flexible core (12) that is elastically deformable; A heat-conducting coating shell (11) wrapping the flexible core (12); Furthermore, a receiving groove (103) for receiving the heat generating element is formed on the heat conducting element, and the receiving groove (103) comprises at least a side wall and a bottom wall.

2. The heat conducting element according to claim 1, characterized in that: The accommodating grooves (103) are arranged on opposite sides of the heat conducting member in the thickness direction.

3. The heat conducting element according to claim 1 or 2, characterized in that: The heat conducting member comprises a flat portion (101) and an abutting portion (102) located at one end or both ends of the flat portion (101); the abutting portion (102) protrudes from one side or both sides of the flat portion (101) in the thickness direction; the surface of the flat portion (101) forms the bottom wall of the receiving groove (103); and the area where the abutting portion (102) protrudes from the flat portion (101) forms the side wall of the receiving groove (103).

4. The heat conducting element according to claim 1 or 2, characterized in that: The heat conducting member comprises two spaced and opposite flat portions (101), and an abutting portion (102) connecting the two flat portions (101), wherein the abutting portion (102) and the two flat portions (101) enclose the accommodating groove (103).

5. The heat conducting element according to any one of claims 1 to 4, characterized in that: The heat conducting member has a bonding area (104) on its surface.

6. The heat conducting element according to any one of claims 1 to 5, characterized in that: The heat-conductive covering shell (11) and the flexible core (12) are bonded by colloid.

7. The heat conducting element according to any one of claims 1 to 6, characterized in that: The heat-conducting coating shell (11) is graphite, and the flexible core (12) is foam or silica gel.

8. The heat conducting element according to any one of claims 1 to 7, characterized in that: The thickness of the single-layer shell of the heat-conducting covering shell (11) is G, and 0.1 mm ≥ G ≥ 1.0 mm.

9. A battery pack, characterized in that: include: A battery housing (3) and a battery cell module (2) located in the battery housing (3), wherein the battery cell module (2) comprises a plurality of battery cell monomers (21) arranged in an arranged manner; A battery core heat conducting member (1), which is the heat conducting member according to any one of claims 1 to 8, and is arranged in the battery core module (2), wherein the receiving groove (103) receives at least one battery core monomer (21), and The abutment portion (102) of the battery core heat conductive member (1) is located beside the battery core monomer (21) and is in heat-conducting contact with the battery housing (3).

10. The battery pack according to claim 9, characterized in that: A plurality of the battery core heat conducting members (1) are provided, one battery core heat conducting member (1) and the battery core monomer (21) contained therein form a battery core unit, and the battery core module (2) comprises a plurality of the battery core units arranged in an arranged manner.

11. The battery pack according to claim 9 or 10, characterized in that: Any one or any combination of a first heat conducting member (4), a second heat conducting member (5), and a third heat conducting member (6) is also provided; wherein, The abutting portion (102) of the battery cell heat conductive member (1) is located on the first side surface and / or the second side surface opposite to the battery cell module (2) and is connected to the battery shell (3); the first heat conductive member (4) is filled between the third side surface of the battery cell module (2) and the battery shell (3); the second heat conductive member (5) is filled between the fourth side surface of the battery cell module (2) and the battery shell (3); and the third heat conductive member (6) is laid between the bottom of the battery cell module (2) and the battery shell (3).

12. The battery pack according to claim 11, characterized in that: The first heat-conducting member (4) is a graphite sheet, silica gel or foam, or comprises a flexible core and a heat-conducting shell wrapping the flexible core.

13. The battery pack according to claim 11 or 12, characterized in that: The second heat-conducting member (5) is a graphite sheet, silica gel or foam, or comprises a flexible core and a heat-conducting shell wrapping the flexible core.

14. The battery pack according to any one of claims 11 to 13, characterized in that: The third heat-conducting member (6) is a graphite sheet, silica gel or foam, or comprises a flexible core and a heat-conducting shell wrapping the flexible core.

15. The battery pack according to any one of claims 9 to 14, characterized in that: A heat sink (31) is provided on the battery housing (3) in an area abutting against the battery core heat conducting member (1), and the heat sink (31) comprises a bottom plate and a plurality of fins arranged on the bottom plate.

16. The battery pack according to any one of claims 6 to 15, characterized in that: In the case where the heat conductive member (1) comprises two spaced and opposite flat portions (101), and an abutting portion (102) connecting the two flat portions (101), and the abutting portion (102) and the two flat portions (101) enclose the accommodating groove (103), the battery pack is further provided with a fourth heat conductive member (7), the abutting portion (102) of the battery cell heat conductive member (1) is located on the first side surface of the battery cell module (2), the fourth heat conductive member (7) is located on the second side surface of the battery cell module (2) opposite to the first side surface, the fourth heat conductive member (7) is attached to the surface of the battery cell module (2), and the dimension O of the fourth heat conductive member (7) in the arrangement direction of the battery cell monomers satisfies: O≥battery cell monomer thickness C*number of battery cell monomers+thickness of the single-layer shell of the heat conductive coating shell G*number of battery cell monomers / 2+thickness of the flexible core Q*(number of battery cell monomers / 2-1); The battery cell comprises a main body and a portion of a tab located outside the main body, and a dimension of the fourth heat conductor in an extending direction of the tab is larger than a dimension of the main body in the same direction.

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