Battery cover assembly and battery

Abstract

This application relates to the field of battery technology, and in particular to a battery cover assembly and a battery. The battery cover assembly includes a cover plate, terminals, and a thermally conductive sealing member. The terminals include a body and a thermally conductive portion. The cover plate has a first mounting through hole, and the body is installed within the first mounting through hole. The thermally conductive portion is installed outside the first mounting through hole and is located on the inner side of the cover plate. The thermally conductive sealing member has a second mounting through hole, and surrounds part of the structure of the body and the exterior of the thermally conductive portion through the second mounting through hole. The body contacts the sidewall of the first mounting through hole for heat conduction through the thermally conductive sealing member, and the thermally conductive portion contacts the inner surface of the cover plate for heat conduction through the thermally conductive sealing member. It is evident that the terminals and mating structure have been redesigned, increasing the thermally conductive area. This effectively and quickly transfers the heat accumulated at the terminals to the cover plate, which then dissipates it rapidly, greatly improving heat dissipation while ensuring a tight seal and preventing leakage.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cover assembly and a battery. Background Technology

[0002] Currently, lithium-ion batteries are widely used in electric vehicles and energy storage systems due to their advantages such as high mechanical strength and high pack efficiency. During charging and discharging, existing batteries generate significant Joule heat in the terminals and internal connectors due to the current flow, as well as heat conducted from the inside of the cell to the terminal area. This heat is not easily dissipated, leading to significant thermal expansion stress in the terminals, causing deformation. This deformation, in turn, causes deformation of the sealing structure, ultimately resulting in seal failure, electrolyte leakage, safety hazards, and performance degradation. Utility Model Content

[0003] The purpose of this application is to provide a battery cover assembly that, to a certain extent, solves the technical problem in the prior art where heat in the electrode area is not easily dissipated, which leads to large thermal expansion stress in the electrode, causing deformation, which in turn causes deformation of the sealing structure, ultimately leading to sealing failure, electrolyte leakage, safety hazards, and performance degradation.

[0004] This application provides a battery cover assembly, including: a cover, a terminal post, and a thermally conductive sealing member; wherein, the terminal post includes a body and a thermally conductive part connected sequentially along a first preset direction, the cover has a first mounting through hole extending along the first preset direction, the body is installed in the first mounting through hole, the thermally conductive part is installed outside the first mounting through hole, and the thermally conductive part is disposed on the inner side of the cover. The thermally conductive sealing member has a second mounting through hole extending along a first preset direction, and the second mounting through hole surrounds the exterior of a portion of the body structure and the exterior of the thermally conductive part. The body conducts heat through the thermally conductive sealing member in contact with the sidewall of the first mounting through hole, and the thermally conductive part conducts heat through the thermally conductive sealing member in contact with the inner surface of the cover plate.

[0005] In the above technical solution, the body further includes a first pole post and a second pole post, and along the first preset direction, the first pole post, the second pole post, and the heat-conducting part are connected in sequence, and the heat-conducting part is disposed near the inner side of the cover plate. The first pole piece, the second pole piece, and the heat-conducting part are arranged to form an annular groove extending around the outer periphery of the second pole piece; a portion of the structure of the second pole piece and the first pole piece are installed in the first mounting through hole of the cover plate, and another portion of the structure of the first pole piece and the heat-conducting part are respectively disposed on the outer and inner sides of the cover plate.

[0006] In any of the above technical solutions, the thermally conductive sealing member further includes an annular snap-fit ​​portion and a circumferential fitting portion connected sequentially along the first preset direction, and the circumferential fitting portion is disposed near the inner side of the cover plate, and the second mounting through hole is formed on the circumferential fitting portion and the annular snap-fit ​​portion. The annular snap-fit ​​portion snaps into the annular slot and is disposed between the inner wall of the first mounting through hole and the outer wall of the second pole portion; the circumferential mating portion forms a mating groove and surrounds the outer periphery of the heat-conducting portion through the mating groove, and at least a portion of the structure is disposed between the outer wall of the circumferential mating portion and the inner surface of the cover plate.

[0007] In any of the above technical solutions, the sidewall of the heat-conducting part is further provided with a first heat-conducting mating slope, and the sidewall of the mating groove is provided with a second heat-conducting mating slope, and the first heat-conducting mating slope and the second heat-conducting mating slope are mated together.

[0008] In any of the above technical solutions, the inclination angle of the first thermally conductive mating inclined surface relative to the first preset direction is 45°~65°.

[0009] In any of the above technical solutions, further, the sidewall of the heat-conducting part is formed with the first heat-conducting mating slope along a direction perpendicular to the first preset direction.

[0010] In any of the above technical solutions, the mating groove further encircles one side surface of the heat-conducting part near the inner side of the cover plate and the entire circumferential sidewall.

[0011] In any of the above technical solutions, the mating groove is further described as a square groove.

[0012] In any of the above technical solutions, further, along the direction perpendicular to the first preset direction, the depth of the annular groove is 2mm~3mm; along the first preset direction, the width of the annular groove is 0.5mm~1mm.

[0013] In any of the above technical solutions, the first electrode portion, the second electrode portion, and the heat-conducting portion are further integrated into a single structure.

[0014] In any of the above technical solutions, the material of the thermally conductive sealing component is thermally conductive silicone.

[0015] In any of the above technical solutions, the heat-conducting part is further shaped as a square.

[0016] This application also provides a battery, including a housing, an electrode assembly, and a battery cover assembly as described in any of the above technical solutions, wherein the electrode assembly is installed inside the housing, and the cover is installed at the opening end of the housing along the first preset direction. Therefore, it possesses all the beneficial technical effects of this battery cover assembly, which will not be elaborated further here.

[0017] In the above technical solution, at least one sidewall of the housing is further provided with a plurality of flow channels, and the plurality of flow channels are arranged sequentially at intervals along the length direction of the corresponding sidewall of the housing; each flow channel extends along the first preset direction, and the flow channel passes through the end of the corresponding sidewall of the housing near the cover plate.

[0018] In any of the above technical solutions, the guide groove further extends through one end of the housing near the cover plate.

[0019] In any of the above technical solutions, the guide groove further extends through one end of the corresponding side wall of the housing, near the closed end of the housing.

[0020] In any of the above technical solutions, the cross-section of the guide channel along the direction perpendicular to the first preset direction is semi-circular.

[0021] In any of the above technical solutions, further, along the direction perpendicular to the first preset direction, the depth of the guide groove is 1 / 5 to 1 / 3 of the thickness of the side wall of the housing.

[0022] Compared with the prior art, the beneficial effects of this application are as follows: The battery cover assembly provided in this application redesigns the terminal post and its mating structure. The terminal post is designed as two parts: a main body and a heat-conducting part. A heat-conducting sealing member surrounds the main body and the heat-conducting part. The main body conducts heat through contact with the sidewall of the first mounting through hole via the heat-conducting sealing member. The heat-conducting part conducts heat through contact with the inner surface of the cover plate via the heat-conducting sealing member. This increases the heat conduction area, which can effectively and quickly transfer the heat accumulated at the terminal post to the cover plate, and then dissipate it quickly by the cover plate. This greatly improves the heat dissipation effect, thereby reducing the thermal expansion stress of the terminal post. Consequently, it reduces the deformation of the heat-conducting sealing member that mates with the terminal post, ensuring a consistent sealing effect, preventing leakage, guaranteeing battery performance, and reducing safety hazards.

[0023] In addition, the flow channels on the side wall of the casing can guide the gas generated by the electrode assembly to the cover plate, and then dissipate it through the large metal heat dissipation surface of the cover plate, which greatly improves the heat dissipation effect of the battery. Moreover, the flow channels on the side wall of the casing can also reduce weight, which is conducive to lightweight design. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 An exploded view of a battery provided in an embodiment of this application; Figure 2 This is a schematic diagram of the pole structure provided in an embodiment of this application; Figure 3 This is another structural schematic diagram of the pole provided in an embodiment of this application; Figure 4 Another structural schematic diagram of the pole provided in the embodiments of this application; Figure 5 for Figure 4 A sectional view along section AA; Figure 6 This is a schematic diagram of the structure of the thermally conductive sealing component provided in the embodiments of this application; Figure 7 This is another structural schematic diagram of the thermally conductive sealing component provided in the embodiments of this application; Figure 8 Another structural schematic diagram of the thermally conductive sealing component provided in the embodiments of this application; Figure 9 for Figure 8 A sectional view along section BB; Figure 10 This is a schematic diagram of the structure of the shell provided in an embodiment of this application; Figure 11 for Figure 10 A magnified structural diagram at point C; Figure 12 Another structural schematic diagram of the housing provided in the embodiments of this application; Figure 13 for Figure 12 A sectional view along section DD; Figure 14 A cross-sectional view of the cover plate assembly provided in an embodiment of this application; Figure 15for Figure 14 A magnified structural diagram at point E.

[0026] Figure label: 1-Cover plate, 2-Pole post, 21-Body, 211-First pole post, 212-Second pole post, 22-Heat-conducting part, 221-First heat-conducting mating slope, 23-Annular groove, 3-Heat-conducting sealing component, 31-Annular snap-fit ​​part, 32-Hugging mating part, 321-Matching groove, 3211-Second heat-conducting mating slope, 33-Second mounting through hole, 4-Pole group, 5-Connecting piece, 6-Mylar membrane, 7-Upper plastic, 8-Shell, 81-Guide groove, a-First preset direction. Detailed Implementation

[0027] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0028] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0029] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] The following reference Figures 1 to 15 This application describes a battery cover assembly and a battery according to some embodiments.

[0033] Example 1 See Figures 1 to 9 , Figure 14 and Figure 15 As shown, an embodiment of this application provides a battery cover assembly, including: a cover plate 1, an electrode post 2, and a thermally conductive sealing member 3; wherein, the electrode post 2 includes a body 21 and a thermally conductive part 22 connected sequentially along a first preset direction a, the cover plate 1 is formed with a first mounting through hole extending along the first preset direction a, and the body 21 is installed in the first mounting through hole, the thermally conductive part 22 is installed outside the first mounting through hole, and the thermally conductive part 22 is disposed on the inner side of the cover plate 1; The thermally conductive sealing member 3 is formed with a second mounting through hole 33 that extends along the first preset direction a. The second mounting through hole 33 surrounds the exterior of part of the structure of the body 21 and the exterior of the thermally conductive part 22. The body 21 contacts the side wall of the first mounting through hole for heat conduction through the thermally conductive sealing member 3. The thermally conductive part 22 contacts the inner surface of the cover plate 1 for heat conduction through the thermally conductive sealing member 3.

[0034] As can be seen from the structure described above, the battery cover assembly provided in this application has redesigned the terminal post 2 and its mating structure. The terminal post 2 is designed as two parts: a main body 21 and a heat-conducting part 22. A heat-conducting sealing member 3 surrounds the main body 21 and the heat-conducting part 22. The main body 21 contacts the side wall of the first mounting hole for heat conduction through the heat-conducting sealing member 3. The heat-conducting part 22 contacts the inner surface of the cover plate 1 for heat conduction through the heat-conducting sealing member 3. This increases the heat conduction area and can effectively and quickly transfer the heat accumulated at the terminal post 2 to the cover plate 1, which is then quickly dissipated by the cover plate 1. This greatly improves the heat dissipation effect, thereby reducing the thermal expansion stress of the terminal post 2 and correspondingly reducing the deformation of the heat-conducting sealing member 3 that mates with the terminal post 2. This ensures a consistent sealing effect, prevents leakage, guarantees battery performance, and reduces safety hazards.

[0035] Furthermore, preferably, the first preset direction a is the thickness direction of the cover plate 1, and preferably, the thickness direction of the cover plate 1, the height direction of the housing 8, and the height direction of the pole group 4 are the same, but of course, it is not limited to this.

[0036] In this embodiment, preferably, as follows: Figures 2 to 5 , Figure 14 and Figure 15 As shown, the main body 21 includes a first pole post 211 and a second pole post 212, and the first pole post 211, the second pole post 212 and the heat-conducting part 22 are connected sequentially along the first preset direction a, and the heat-conducting part 22 is disposed close to the inner side of the cover plate 1. The first pole post 211, the second pole post 212, and the heat-conducting part 22 are arranged to form an annular groove 23 extending around the outer periphery of the second pole post 212; a portion of the structure of the second pole post 212 and a portion of the structure of the first pole post 211 are installed in the first mounting through hole of the cover plate 1, and the other portion of the structure of the first pole post 211 and the heat-conducting part 22 are respectively disposed on the outer side and the inner side of the cover plate 1.

[0037] Further, preferably, such as Figures 6 to 9 As shown, the thermally conductive sealing component 3 includes an annular snap-fit ​​portion 31 and a circumferential fitting portion 32 connected sequentially along a first preset direction a. The circumferential fitting portion 32 is disposed near the inner side of the cover plate 1, and a second mounting through hole 33 is formed on the annular snap-fit ​​portion 31 and the circumferential fitting portion 32. The annular snap-fit ​​part 31 snaps into the annular snap-fit ​​groove 23 and is disposed between the inner wall of the first mounting through hole and the outer wall of the second pole post part 212; the circumferential mating part 32 is formed with a mating groove 321 and is surrounded by the mating groove 321 on the outer periphery of the heat-conducting part 22, and at least part of the structure is disposed between the outer wall of the circumferential mating part 32 and the inner surface of the cover plate 1.

[0038] As can be seen from the structure described above, an annular groove 23 is provided in the middle of the pole post 2 around its axis, so that the annular snap-fit ​​part 31 of the heat-conducting sealing component 3 can be snapped into the annular groove 23 of the pole post 2, thereby forming an interlocking structure, which makes the pole post 2 and the heat-conducting sealing component 3 fit more stably and firmly, which helps to improve the sealing performance and thermal conductivity.

[0039] Furthermore, preferably, the mating groove 321 surrounds the inner surface of the heat-conducting part 22 near the cover plate 1 and the entire circumferential sidewall, increasing the contact area between the heat-conducting part 22 and the mating groove 321, increasing the stability and firmness of the assembly, and helping to improve the thermal conductivity between the heat-conducting part 22 and the cover plate 1. Of course, it is not limited to this; the mating groove 321 may also surround the inner surface of the heat-conducting part 22 near the cover plate 1, without including the sidewall of the heat-conducting part 22, depending on the actual needs.

[0040] In this embodiment, preferably, as follows: Figures 3 to 5 , Figure 9 As shown, the sidewall of the heat-conducting part 22 has a first heat-conducting mating slope 221, and the sidewall of the mating groove 321 has a second heat-conducting mating slope 3211, and the first heat-conducting mating slope 221 and the second heat-conducting mating slope 3211 are mated together.

[0041] As can be seen from the structure described above, designing the sidewall of the heat-conducting part 22 as inclined increases the heat-conducting area, further reduces the contact thermal resistance, thereby accelerating heat conduction and improving heat dissipation. Of course, it is not limited to this; the first heat-conducting mating inclined surface 221 and the second heat-conducting mating inclined surface 3211 may not be provided, depending on the actual needs.

[0042] Furthermore, preferably, along a direction perpendicular to the first preset direction a, the sidewall of the heat-conducting part 22 is formed with a first heat-conducting mating slope 221, which meets the assembly requirements and is convenient for processing and manufacturing.

[0043] In this embodiment, preferably, as follows: Figure 9 As shown, the inclination angle θ of the first thermally conductive mating inclined surface 221 relative to the first preset direction a is 45°~65°, which satisfies the requirement of increasing the thermally conductive area and facilitates processing and manufacturing. Of course, it is not limited to this; the inclination angle θ of the first thermally conductive mating inclined surface 221 relative to the first preset direction a can be less than 45° or greater than 65°.

[0044] Furthermore, preferably, the edges, i.e. sharp corners, of the heat-conducting part 22 need to be rounded.

[0045] In this embodiment, preferably, as follows: Figure 3 As shown, the heat-conducting part 22 is square. The square heat-conducting part 22 has a large area, which in turn increases the contact area with the cover plate 1, thus aiding in heat conduction. Moreover, its regular shape makes it convenient for processing and manufacturing.

[0046] Furthermore, preferably, when the heat-conducting part 22 is square, correspondingly, such as Figure 7 As shown, the groove 321 is a matching square groove, which ensures the stability and firmness of the two after assembly and helps with heat conduction.

[0047] It should be noted that: it is not limited to this, the heat-conducting part 22 can also be other shapes, for example, the heat-conducting part 22 is circular, and correspondingly, the matching groove 321 is also circular.

[0048] In this embodiment, preferably, as follows: Figure 2 As shown, the first electrode 211, the second electrode 212, and the heat-conducting part 22 are an integral structure, which has high overall strength, is not easily damaged, has a long service life, and will not cause the problem of increased resistance caused by connecting the separate structures through welding or other means.

[0049] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, along the direction perpendicular to the first preset direction a, the depth H of the annular groove 23 is 2mm~3mm; along the first preset direction a, the width L of the annular groove 23 is 0.5mm~1mm.

[0050] As can be seen from the structure described above, the use of the annular groove 23 within the above-mentioned size range can ensure the bonding area and bonding strength between the thermally conductive sealing component 3 and the pole post 2 at the assembly point, making the thermally conductive sealing component 3 and the pole post 2 more firmly and stably assembled, which is helpful for both sealing and heat conduction.

[0051] It should be noted that the depth H of the annular groove 23 is not limited to the above, but can be less than 2mm or greater than 3mm; the width L of the annular groove 23 is not limited to the above, but can be less than 0.5mm or greater than 1mm.

[0052] In this embodiment, preferably, the thermally conductive sealing component 3 is made of thermally conductive silicone, which not only has the function of conducting heat, but also has a certain elasticity and sealing properties. It can replace or assist the traditional O-ring seal, effectively absorb the small displacement of the pole 2 caused by thermal expansion, compensate for deformation, and thus greatly reduce the risk of sealing failure and leakage caused by thermal expansion and contraction. Of course, the material of the thermally conductive sealing component 3 is not limited to this.

[0053] Example 2 Figure 1 As shown, Embodiment 2 of this application also provides a battery, including a housing 8, an electrode assembly 4, and the battery cover assembly described in Embodiment 1 above. The electrode assembly 4 is installed inside the housing 8, and the cover 1 is installed at the opening end of the housing 8 along the first preset direction a. Therefore, it possesses all the beneficial technical effects of this battery cover assembly, and the same technical features and beneficial effects will not be repeated.

[0054] In this embodiment, preferably, as follows: Figures 10 to 13 As shown, at least one sidewall of the housing 8 is provided with a plurality of flow channels 81, and the plurality of flow channels 81 are arranged sequentially at intervals along the length direction of the corresponding sidewall of the housing 8. It should be noted that the length direction of each sidewall is different and is selected according to actual needs. Any flow channel 81 extends along the first preset direction a, and the flow channel 81 penetrates the end of the corresponding sidewall of the housing 8 near the cover plate 1. That is to say, the end of the flow channel 81 near the cover plate 1 is through.

[0055] As can be seen from the structure described above, this application provides a guide groove 81 along the first preset direction a on the side wall of the housing 8, which can guide the gas generated by the electrode group 4 to the cover plate 1 along the guide groove 81 and dissipate it from the large metal heat dissipation surface of the cover plate 1, greatly improving the heat dissipation effect of the battery. Moreover, providing a guide groove 81 on the side wall of the housing 8 can also reduce weight, which is conducive to lightweight design.

[0056] In addition, the heat generated by the terminal post 2 and its internal connectors, as well as the heat generated by the aforementioned electrode assembly 4, accumulates at the terminal post 2 with the gas. This heat can be quickly transferred to the cover plate 1 through the thermally conductive sealing component 3 and then quickly dissipated by the cover plate 1. This greatly improves the heat dissipation effect and reduces the thermal expansion stress of the terminal post 2. Consequently, it reduces the deformation of the thermally conductive sealing component 3 that cooperates with the terminal post 2, ensuring a consistent sealing effect, preventing leakage, guaranteeing battery performance, and reducing safety hazards.

[0057] Furthermore, preferably, each side wall of the housing 8 is provided with a plurality of flow channels 81 to improve the flow guidance and heat dissipation effect.

[0058] Furthermore, preferably, the shell 8 is a rectangular shell, and correspondingly, the cover plate 1 is a rectangular plate. It can be seen that multiple guide grooves 81 are provided on the four side walls of the shell 8, and the multiple guide grooves 81 on the side wall formed by the long side and the high side of the shell 8, that is, the large surface, are arranged sequentially at intervals along the length direction of this side wall, that is, the length direction of the shell 8. The multiple guide grooves 81 on the side wall formed by the wide side and the high side of the shell 8, that is, the small surface, are arranged sequentially at intervals along the length direction of this side wall, that is, the width direction of the shell 8. Of course, it is not limited to this.

[0059] In this embodiment, preferably, as follows: Figures 10 to 13 As shown, the flow channel 81 extends through the end of the housing 8 near the cover plate 1, so that the gas can be directly conducted to the cover plate 1, allowing the gas to directly contact the cover plate 1 for heat conduction, which helps to improve the heat dissipation effect.

[0060] In this embodiment, preferably, as follows: Figure 13 As shown, the guide channel 81 penetrates the side wall of the corresponding housing 8 near the closed end of the housing 8. That is, along the first preset direction a, one end of the housing 8 is an open end, and a cover plate 1 is installed thereon. The other end is closed, and the end of the guide channel 81 near the closed end is through-type. That is, the other end of the guide channel 81 ends at the closed end of the housing 8, but does not penetrate the closed end of the housing 8. In this way, no matter where the electrode group 4 generates gas from, it can be guided to the cover plate 1 by the guide channel 81, thereby improving the heat dissipation effect.

[0061] In this embodiment, preferably, as follows: Figure 11 As shown, the cross-section of the flow guide 81 along the first preset direction a is semi-circular. This shape has no sharp edges, uniform stress distribution, good metal flow during extrusion molding, is less prone to cracking, and provides good structural support. Of course, the cross-sectional shape of the flow guide 81 is not limited to this; it can also be polygonal, etc.

[0062] In this embodiment, preferably, as follows: Figure 2As shown, along the direction perpendicular to the first preset direction a, the depth h of the flow channel 81 is 1 / 5 to 1 / 3 of the thickness a of the side wall of the housing 8, which not only ensures the space of the flow channel 81 to meet the flow guidance requirements, but also ensures the strength requirements of the side wall of the housing 8.

[0063] It should be noted that, not limited to the above, the ratio of the depth h of the guide groove 81 to the thickness a of the side wall of the housing 8 can also be made less than 1 / 5 or greater than 1 / 3 along the direction perpendicular to the first preset direction a, depending on the actual needs.

[0064] It should be noted that the battery provided in this application also includes structures such as upper plastic 7, connecting piece 5 and Mylar membrane 6. The upper plastic 7 is arranged around the exposed outer side of the cover plate 1 around the electrode post 2. The electrode post 2 is connected to the electrode tab of the electrode group 4 through the connecting piece 5. The Mylar membrane 6 covers the outside of the electrode group 4. Of course, this part is all prior art and will not be described in detail here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cover assembly, characterized in that, include: A cover plate, an electrode post, and a heat-conducting sealing component; wherein the electrode post includes a body and a heat-conducting part connected sequentially along a first preset direction, the cover plate has a first mounting through hole extending along the first preset direction, the body is installed in the first mounting through hole, the heat-conducting part is installed outside the first mounting through hole, and the heat-conducting part is disposed on the inner side of the cover plate. The thermally conductive sealing member has a second mounting through hole extending along a first preset direction, and the second mounting through hole surrounds the exterior of a portion of the body structure and the exterior of the thermally conductive part. The body conducts heat through the thermally conductive sealing member in contact with the sidewall of the first mounting through hole, and the thermally conductive part conducts heat through the thermally conductive sealing member in contact with the inner surface of the cover plate.

2. The battery cover assembly according to claim 1, characterized in that, The main body includes a first pole post and a second pole post, and along the first preset direction, the first pole post, the second pole post, and the heat-conducting part are connected in sequence, and the heat-conducting part is disposed near the inner side of the cover plate. The first electrode portion, the second electrode portion, and the heat-conducting portion are arranged to form an annular groove extending around the outer periphery of the second electrode portion; The second pole piece and a portion of the structure of the first pole piece are both installed in the first mounting through hole of the cover plate, and the other portion of the structure of the first pole piece and the heat-conducting part are respectively disposed on the outer side and the inner side of the cover plate.

3. The battery cover assembly according to claim 2, characterized in that, The thermally conductive sealing component includes an annular snap-fit ​​portion and a circumferential fitting portion connected sequentially along the first preset direction. The circumferential fitting portion is disposed near the inner side of the cover plate, and the second mounting through hole is formed on the circumferential fitting portion and the annular snap-fit ​​portion. The annular snap-fit ​​portion snaps into the annular slot and is disposed between the inner wall of the first mounting through hole and the outer wall of the second pole portion; the circumferential mating portion forms a mating groove and surrounds the outer periphery of the heat-conducting portion through the mating groove, and at least a portion of the structure is disposed between the outer wall of the circumferential mating portion and the inner surface of the cover plate.

4. The battery cover assembly according to claim 3, characterized in that, The sidewall of the heat-conducting part is formed with a first heat-conducting mating slope, and the sidewall of the mating groove is formed with a second heat-conducting mating slope, and the first heat-conducting mating slope and the second heat-conducting mating slope are mated together.

5. The battery cover assembly according to claim 4, characterized in that, The first thermally conductive inclined surface has an inclination angle of 45°~65° relative to the first preset direction; and / or Along a direction perpendicular to the first preset direction, the sidewall of the heat-conducting part is formed with the first heat-conducting mating slope.

6. The battery cover assembly according to claim 3, characterized in that, The mating groove surrounds the inner surface of the heat-conducting part near the cover plate and the entire circumferential sidewall; and / or The mating groove is a square groove.

7. The battery cover assembly according to claim 2, characterized in that, Along a direction perpendicular to the first preset direction, the depth of the annular groove is 2mm~3mm; along the first preset direction, the width of the annular groove is 0.5mm~1mm; and / or The first electrode section, the second electrode section, and the heat-conducting section are an integral structure.

8. The battery cover assembly according to any one of claims 1 to 7, characterized in that, The thermally conductive sealing component is made of thermally conductive silicone; and / or The heat-conducting part is square.

9. A battery, characterized in that, The device includes a housing, an electrode assembly, and a battery cover assembly as described in any one of claims 1 to 8; wherein the electrode assembly is installed inside the housing, and the cover is installed at the opening end of the housing along the first preset direction.

10. The battery according to claim 9, characterized in that, At least one sidewall of the housing is provided with a plurality of flow channels, and the plurality of flow channels are arranged sequentially at intervals along the length of the corresponding sidewall of the housing; each flow channel extends along the first preset direction and passes through the end of the corresponding sidewall of the housing near the cover plate.

11. The battery according to claim 10, characterized in that, The flow channel extends through one end of the housing near the cover plate; and / or The guide channel extends through one end of the corresponding sidewall of the housing, near the closed end of the housing; and / or The cross-section of the guide channel along the direction perpendicular to the first preset direction is semi-circular; and / or Along a direction perpendicular to the first preset direction, the depth of the guide groove is 1 / 5 to 1 / 3 of the thickness of the sidewall of the housing.

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