Battery cover plate assembly

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly which comprises a cover plate, a pole fixing component, a pole, a first insulating part and a sealing ring, a first mounting through hole is formed in the cover plate, the pole fixing component is mounted in the first mounting through hole, and the two ends of the pole fixing component extend to the inner side and the outer side of the cover plate; the pole, the first insulating part and the sealing ring are all arranged outside the pole fixing component in a sleeving manner, the first insulating part is arranged between the pole and the cover plate, and the sealing ring is arranged at an opening in the inner side of the mounting through hole and is compressed between the inner side of the cover plate and the pole; an air guide channel is defined by the pole fixing component, the first insulating part and the pole, one end of the air guide channel extends to the sealing ring, and the other end of the air guide channel is communicated with the outside. In addition, due to the fact that the air guide channel communicated with the outside and the sealing ring is arranged, the risk that the sealing performance of the sealing ring cannot be accurately inspected due to the fact that the first insulating piece is tightly attached to the top cover piece and the pole assembling face in a sealed mode is reduced, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery cover assembly. Background Art

[0002] At present, with the wide application of lithium batteries, the safety performance of lithium batteries has been paid more and more attention. The sealing performance of the structural components of lithium batteries needs to be effectively tested to prevent safety risks caused by undetected problems. At present, a first insulating member is provided between the cover pole and the top cover sheet, and the assembly surface between the pole and the first insulating member is in close contact along the assembly direction, which has a certain sealing effect. The airtightness of the cover is mainly achieved by the sealing ring pressed under the top cover sheet. The aforementioned assembly surface is outside the sealing ring. If the sealing ring fails, it may not be detected due to the seal between the pole and the first insulating member, resulting in safety risks. Summary of the Utility Model

[0003] The purpose of the present application is to provide a battery cover assembly, which to a certain extent solves the technical problem in the prior art that in a battery, if the sealing ring fails, it may not be detected due to the seal between the pole and the first insulating member, resulting in safety risks.

[0004] The present application provides a battery cover assembly, including: a cover, a pole fixing member, a pole, a first insulating member, and a sealing ring; wherein, the cover is formed with a first installation through hole, the pole fixing member is installed in the first installation through hole, and both ends of the pole fixing member extend to the inner and outer sides of the cover respectively;

[0005] The pole, the first insulating member, and the sealing ring are all sleeved outside the pole fixing member, and the first insulating member is arranged between the pole and the cover, the sealing ring is arranged at the inner opening of the installation through hole and is compressed between the inner side of the cover and the pole; the pole fixing member, the first insulating member, and the pole enclose an air guiding channel, and one end of the air guiding channel extends to the sealing ring, and the other end of the air guiding channel is communicated with the outside.

[0006] In the above technical solution, further, the first insulating member is formed with a second installation through hole and is sleeved outside the pole fixing member through the second installation through hole;

[0007] The air guiding channel includes a first air guiding channel and a second air guiding channel that are communicated with each other, and the first air guiding channel is formed between the hole wall of the second installation through hole and the side wall of the pole fixing member and extends to the sealing ring;

[0008] The second air guide channel is formed between the first insulating member and the pole column, and the second air guide channel is in communication with the outside.

[0009] In any of the above technical solutions, further, a first air guide groove is formed on the inner wall of the second mounting through hole.

[0010] In any of the above technical solutions, further, the first insulating member has a first fitting surface, the pole column has a second fitting surface, and the first fitting surface cooperates with the second fitting surface. The first fitting surface and / or the second fitting surface form a second total air guide groove, and an air guide gap is formed between the first fitting surface and the second fitting surface. The second total air guide groove is in communication with the first air guide groove and the air guide gap respectively.

[0011] In any of the above technical solutions, further, the pole column has a fitting boss, the first insulating member has a fitting groove, and the fitting boss is installed in the fitting groove; the second total air guide groove is formed on the outer wall of the fitting boss and / or the inner wall of the fitting groove.

[0012] In any of the above technical solutions, further, the second total air guide groove includes a second air guide groove and a third air guide groove. The second air guide groove is formed on the bottom wall of the fitting boss and / or the fitting groove, the third air guide groove is formed on the side wall of the fitting boss and / or the fitting groove, the air guide gap is formed between the structure on the outer periphery of the fitting boss and the structure on the outer periphery of the fitting groove, and the first air guide groove, the second air guide groove, the third air guide groove, the air guide gap and the outside are connected in sequence.

[0013] In any of the above technical solutions, further, the number of the first air guide grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the second mounting through hole;

[0014] The number of the second air guide grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the fitting boss; the number of the third air guide grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the fitting groove; the number of the multiple first air guide grooves, the multiple second air guide grooves and the multiple third air guide grooves is equal and they correspond to each other one by one.

[0015] In any of the above technical solutions, further, the pole column has a third mounting through hole, and the third mounting through hole penetrates through the fitting boss. One end of the second air guide groove is in communication with the third mounting through hole, and the other end of the second air guide groove penetrates through the side wall of the fitting boss.

[0016] In any of the above technical solutions, further, one end of the third air guide groove extends to the bottom of the assembly groove, and the other end of the three air guide grooves extends to the opening of the assembly groove.

[0017] In any of the above technical solutions, further, the assembly boss is a non-rotary body structure.

[0018] In any of the above technical solutions, further, along the direction from the inner side to the outer side of the cover plate, the height of the assembly boss is greater than the depth of the assembly groove.

[0019] In any of the above technical solutions, further, the first insulating member is formed with an insulating protrusion portion, and the insulating protrusion portion is installed in the first installation through hole, extends towards the sealing ring, and abuts against the sealing ring.

[0020] In any of the above technical solutions, further, the cover plate is formed with a positioning groove, the first insulating member is formed with a positioning protrusion portion located on the outer periphery of the insulating protrusion portion, and the positioning protrusion portion is installed in the positioning groove.

[0021] In any of the above technical solutions, further, the positioning protrusion portion is a non-rotary body structure.

[0022] In any of the above technical solutions, further, the pole column is formed with a riveting counterbore, and after the pole column fixing member is riveted to the pole column, an end portion of the pole column fixing member forms a limiting platform adapted to the riveting counterbore.

[0023] In any of the above technical solutions, further, the pole column fixing member includes a bottom plate and a column body connected to each other, and the column body passes through the first installation through hole, and both ends of the column body extend to the inner side and the outer side of the cover plate respectively; the bottom plate is located on the inner side of the cover plate, and the bottom plate is connected to one end of the column body located on the inner side of the cover plate.

[0024] Compared with the prior art, the beneficial effects of the present application are as follows:

[0025] When the battery cover plate assembly provided by the present application is applied to a battery, due to the provision of an air guide channel communicating the outside and the sealing ring, the risk of being unable to accurately inspect the sealing performance of the sealing ring due to the tight sealing of the first insulating member with the top cover sheet and the pole column assembly surface can be effectively reduced, that is, the sealing effect of the sealing ring can be effectively verified, and the safety of the battery is improved. Description of the Drawings

[0026] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the battery cover plate assembly provided by an embodiment of the present application (the current collector is in an unbent state);

[0028] Figure 2 For Figure 1 Cross-sectional view along the A-A section;

[0029] Figure 3 For Figure 2 Enlarged structural schematic diagram at B;

[0030] Figure 4 Structural schematic diagram of the pole column provided by an embodiment of the present application;

[0031] Figure 5 Cross-sectional view of the pole column provided by an embodiment of the present application;

[0032] Figure 6 Structural schematic diagram of the first insulating member provided by an embodiment of the present application;

[0033] Figure 7 Another structural schematic diagram of the first insulating member provided by an embodiment of the present application;

[0034] Figure 8 Cross-sectional view of the first insulating member provided by an embodiment of the present application.

[0035] Reference numerals:

[0036] 1 - Cover plate, 2 - Pole column fixing member, 21 - Bottom plate, 22 - Column body, 23 - Limiting platform, 3 - Pole column, 31 - Assembly boss, 32 - Riveting counterbore, 33 - Third installation through hole, 4 - First insulating member, 41 - Second installation through hole, 42 - First air guide groove, 43 - Assembly groove, 44 - Insulating protrusion, 45 - Positioning protrusion, 5 - Sealing ring, 6 - Air guide channel, 61 - First air guide channel, 62 - Second air guide channel, 621 - Second total air guide groove, 6211 - Second air guide groove, 6212 - Third air guide groove, 622 - Air guide gap. Specific embodiments

[0037] The following will clearly and completely describe the technical solutions of the present application in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0038] The components of the embodiments of the present application that are typically depicted and shown in the accompanying drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application.

[0039] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific situations.

[0042] Reference is now made to Figures 1 to 8 Describe a battery cover assembly according to some embodiments of the present application.

[0043] Referring to Figures 1 to 3 As shown, embodiments of the present application provide a battery cover assembly, including: a cover 1, a pole fixing member 2, a pole 3, a first insulating member 4, and a sealing ring 5; wherein, the cover 1 is formed with a first mounting through hole, the pole fixing member 2 is mounted in the first mounting through hole, and both ends of the pole fixing member 2 respectively extend to the inner side and the outer side of the cover 1;

[0044] The terminal post 3, the first insulating member 4, and the sealing ring 5 are all sleeved outside the terminal post fixing member 2. The first insulating member 4 is disposed between the terminal post 3 and the cover plate 1. The sealing ring 5 is disposed at the inner opening of the mounting through hole and is compressed between the inner side of the cover plate 1 and the terminal post 3. The terminal post fixing member 2, the first insulating member 4, and the terminal post 3 enclose an air guiding channel 6. One end of the air guiding channel 6 extends to the sealing ring 5, and the other end of the air guiding channel 6 is communicated with the outside.

[0045] According to the structure described above, when the battery cover plate assembly provided in the present application is applied to a battery, due to the provision of the air guiding channel 6 communicating the outside and the sealing ring 5, the risk of being unable to accurately inspect the sealing performance of the sealing ring 5 caused by the tight sealing of the mating surfaces of the first insulating member 4, the top cover piece, and the terminal post 3 can be effectively reduced. That is, the sealing effect of the sealing ring 5 can be effectively verified, and the safety of the battery is improved.

[0046] In this embodiment, preferably, as Figure 3 shown, the first insulating member 4 is formed with a second mounting through hole 41 and is sleeved outside the terminal post fixing member 2 through the second mounting through hole 41.

[0047] The air guiding channel 6 includes a first air guiding channel 61 and a second air guiding channel 62 that are communicated with each other. The first air guiding channel 61 is formed between the hole wall of the second mounting through hole 41 and the side wall of the terminal post fixing member 2, and the first air guiding channel 61 extends to the sealing ring 5.

[0048] The second air guiding channel 62 is formed between the first insulating member 4 and the terminal post 3, and the second air guiding channel 62 is communicated with the outside.

[0049] According to the structure described above, the first air guiding channel 61 is mainly arranged along the vertical direction and can thus be communicated to the sealing ring 5. The second air guiding channel 62 is mainly arranged along the horizontal direction and serves to communicate the outside and the foregoing first air guiding channel 61.

[0050] In this embodiment, preferably, as Figure 6 and Figure 7 shown, a first air guiding groove 42 is formed on the hole wall of the second mounting through hole 41.

[0051] According to the structure described above, the first air guiding groove 42 is opened on the hole wall of the second mounting through hole 41 to form the foregoing first air guiding channel 61 and to prevent it from being blocked by the terminal post fixing member 2, ensuring the air guiding effect.

[0052] In this embodiment, preferably, as Figure 3As shown, the first insulating member 4 is formed with a first fitting surface, the pole column 3 is formed with a second fitting surface, and the first fitting surface is adapted to the second fitting surface. A second total air guiding groove 621 is formed between the first fitting surface and the second fitting surface. An air guiding gap 622 is further formed between the first fitting surface and the second fitting surface. The second total air guiding groove 621 is respectively communicated with the first air guiding groove 42 and the air guiding gap 622.

[0053] According to the structure described above, this second total air guiding groove 621 serves as the aforementioned second air guiding channel 62 and plays a role in guiding air.

[0054] In this embodiment, preferably, as Figure 3 、 Figure 4 and Figure 7 shown, the pole column 3 is formed with a fitting boss 31, the first insulating member 4 is formed with a fitting groove 43, and the fitting boss 31 is installed in the fitting groove 43; the second total air guiding groove 621 is formed on the outer wall of the fitting boss 31 and the inner wall of the fitting groove 43.

[0055] According to the structure described above, the fitting boss 31 is installed in the fitting groove 43, which plays a role in fitting and positioning, making the cooperation between the pole column 3 and the first insulating member 4 firmer and more stable, and helping to improve the fitting efficiency. Moreover, setting the aforementioned second total air guiding groove 621 on this fitting surface can guide air and contribute to the airtightness detection of the sealing ring 5.

[0056] In this embodiment, preferably, as Figure 3 、 Figure 4 、 Figure 6 and Figure 7 shown, the second total air guiding groove 621 includes a second air guiding groove 6211 and a third air guiding groove 6212. The second air guiding groove 6211 is formed on the bottom wall of the fitting boss 31, the third air guiding groove 6212 is formed on the side wall of the fitting groove 43, the air guiding gap 622 is formed between the structure on the outer periphery of the fitting boss 31 and the structure on the outer periphery of the fitting groove 43, and the first air guiding groove 42, the second air guiding groove 6211, the third air guiding groove 6212, the air guiding gap 622 and the outside are sequentially communicated.

[0057] According to the structure described above, air guiding grooves are respectively opened on the fitting boss 31 and the fitting groove 43 instead of on one structural member. While ensuring air guiding, it helps to ensure the strength of the above two structural members. Moreover, opening the air guiding groove on the bottom wall of the fitting boss 31 is more convenient for processing than opening the air guiding groove on the bottom wall of the fitting groove 43.

[0058] Furthermore, preferably, as Figures 3 to 5As shown, the terminal post 3 is formed with a third mounting through-hole 33, and the third mounting through-hole 33 penetrates the assembly boss 31. One end of the second air guide groove 6211 is connected to the third mounting through-hole 33, and the other end of the second air guide groove 6211 penetrates the side wall of the assembly boss 31. With the second air guide groove 6211 having the above structure, on the one hand, it is to facilitate the connection with the first air guide groove 42 and the second air guide groove 6211, and on the other hand, it is more convenient for processing and manufacturing.

[0059] Further, preferably, as Figure 3 and Figure 7 shown, one end of the third air guide groove 6212 extends to the bottom of the assembly groove 43, and the other end of the third air guide groove 6212 extends to the opening of the assembly groove 43. With the third air guide groove 6212 having the above structure, on the one hand, it is to facilitate the connection with the second air guide groove 6211, and on the other hand, it is more convenient for processing and manufacturing.

[0060] Further, preferably, an L-shaped annular step surface is formed on the outer periphery of the assembly boss 31, which includes a vertical surface and a horizontal surface. The vertical surface just mates with the side wall surface of the assembly groove 43, and the horizontal surface mates with the horizontal surface outside the assembly groove 43, and there is the aforementioned air guide gap 622 formed between the two, which can communicate with the outside.

[0061] Based on the above, along the direction from the inner side to the outer side of the cover plate 1, the height of the assembly boss 31 is greater than the depth of the assembly groove 43, so that the aforementioned air guide gap 622 can be formed.

[0062] It should be noted that: it is not limited to opening the second air guide groove 6211 on the bottom wall of the assembly boss 31 and opening the third air guide groove 6212 on the side wall of the assembly groove 43. Other air guide structures can also be adopted. For example: opening the third air guide groove 6212 on the side wall of the assembly groove 43 and opening the second air guide groove 6211 on the bottom wall of the assembly groove 43, or only opening the second air guide groove 6211 on the bottom wall of the assembly boss 31 and opening the third air guide groove 6212 on the bottom wall of the assembly boss 31, or only opening the second air guide groove 6211 on the bottom wall of the assembly groove 43 and opening the third air guide groove 6212 on the bottom wall of the assembly groove 43, or opening the second air guide groove 6211 on the bottom walls of both the assembly boss 31 and the assembly groove 43 and opening the third air guide groove 6212 on the side walls of both the assembly boss 31 and the assembly groove 43, etc.

[0063] In addition, it should also be noted that: it is not limited to only opening the first air guide groove 42 on the hole wall of the second mounting through-hole 41. The first air guide groove 42 can also be opened only on the side wall of the terminal post fixing member 2, or the first air guide groove 42 can be opened on the hole wall of the second mounting through-hole 41 and the side wall of the terminal post fixing member 2 at the same time, which is designed according to actual needs.

[0064] In this embodiment, preferably, as Figure 4 , Figure 6 and Figure 7 shown, the number of the first air guide grooves 42 is multiple, and they are sequentially arranged at intervals along the circumferential direction of the second mounting through hole 41; the number of the second air guide grooves 6211 is multiple, and they are sequentially arranged at intervals along the circumferential direction of the assembly boss 31; the number of the third air guide grooves 6212 is multiple, and they are sequentially arranged at intervals along the circumferential direction of the assembly groove 43;

[0065] And preferably, the number of the multiple first air guide grooves 42, the multiple second air guide grooves 6211 and the multiple third air guide grooves 6212 is equal, and they correspond to each other one by one.

[0066] According to the structure described above, setting the multiple first air guide grooves 42, the second air guide grooves 6211 and the third air guide grooves 6212 that correspond to each other one by one ensures the uniformity of air guiding, and helps to improve the detection accuracy of the sealing performance of the sealing ring 5.

[0067] It should be noted that: preferably, the number of the first air guide grooves 42, the second air guide grooves 6211 and the third air guide grooves 6212 is four. Of course, it is not limited to this. The number of the first air guide grooves 42, the second air guide grooves 6211 and the third air guide grooves 6212 can also be less than four, such as one, two or three, or greater than four, such as five or six, etc., and is specifically designed according to actual needs.

[0068] In this embodiment, preferably, as Figure 4 shown, the assembly boss 31 is a non-rotary body structure.

[0069] According to the structure described above, the assembly boss 31 adopts a non-rotary body structure, which plays a role in preventing rotation and improves the stability and reliability of the structure.

[0070] Furthermore, preferably, the assembly boss 31 is in the shape of a cube. Of course, it is not limited to this.

[0071] In this embodiment, preferably, as Figure 3 and Figure 6 shown, the first insulating member 4 is formed with an insulating protrusion 44, and the insulating protrusion 44 is installed in the first mounting through hole, extends towards the sealing ring 5, and abuts against the sealing ring 5.

[0072] According to the structure described above, the insulating protrusion 44 extends into the first mounting through hole and extends all the way to the sealing ring 5, which plays a role in isolating the pole fixing member 2 from the cover plate 1, that is, plays a role in insulation protection.

[0073] Further, preferably, the second mounting through hole 41 also penetrates through the insulating protrusion 44.

[0074] In this embodiment, preferably, as Figure 3 and Figure 6 shown, the cover plate 1 is formed with a positioning groove, the first insulating member 4 is formed with a positioning protrusion 45 located on the outer periphery of the insulating protrusion 44, and the positioning protrusion 45 is installed in the positioning groove.

[0075] According to the structure described above, the positioning protrusion 45 is installed in the positioning groove, which plays a role in assembly positioning, making the upper insulating member cooperate with the cover plate 1 more firmly and stably, and helping to improve the assembly efficiency. Moreover, the above-mentioned positioning protrusion 45 is formed on the outer periphery of the insulating protrusion 44, without interference. And when the positioning protrusion 45 is installed into the positioning groove, the insulating protrusion 44 can also be exactly installed into the first mounting through hole, facilitating assembly.

[0076] In this embodiment, preferably, as Figure 6 shown, the positioning protrusion 45 is a non-rotary body structure.

[0077] According to the structure described above, the positioning protrusion 45 adopts a non-rotary body structure, which plays a role in preventing rotation and improves the stability and reliability of the structure.

[0078] Further, preferably, the positioning protrusion 45 is in the shape of a cube. Of course, it is not limited to this.

[0079] In this embodiment, preferably, as Figure 3 and Figure 5 shown, the pole column 3 is formed with a riveting counterbore 32, and when the pole column fixing member 2 is riveted to the pole column 3, the end of the pole column fixing member 2 forms a limiting platform 23 adapted to the riveting counterbore 32.

[0080] According to the structure described above, the limiting platform 23 cooperates with the riveting counterbore 32 to form a limiting structure, which plays a role in limiting the pole column 3.

[0081] In this embodiment, preferably, as Figure 3 shown, the pole column 3 includes a bottom plate 21 and a column body 22 connected to each other, and the column body 22 penetrates through the first mounting through hole, and both ends of the column body 22 extend to the inner side and the outer side of the cover plate 1 respectively; the bottom plate 21 is located on the inner side of the cover plate 1, and the bottom plate 21 is connected to one end of the column body 22 located on the inner side of the cover plate 1.

[0082] According to the structure described above, the pole column fixing member 2 is designed into the structure of the column body 22 and the bottom plate 21. The column body 22 is convenient for assembling with the first mounting through hole of the cover plate 1, and the bottom plate 21 is convenient for abutting and welding with the pole ear of the pole group, increasing the welding area and helping to improve the current-carrying capacity.

[0083] Furthermore, preferably, the bottom plate 21 and the column 22 are of an integral structure. Of course, it is not limited thereto, and they may also be of a split structure and assembled together by means such as welding.

[0084] Of course, the battery cell cover plate 1 assembly of the present application further includes a second insulating member such as a lower plastic, etc., which is disposed on the inner surface of the cover plate 1, and a part of the structure extends between the bottom plate 21 and the inner side of the cover plate 1 as described above. In addition, the battery cell cover plate 1 assembly of the present application may further include structures such as an explosion-proof valve, etc. Herein, they will not be elaborated one by one.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover plate assembly, characterized in that, Including: A cover plate, a pole fixing member, a pole, a first insulating member, and a sealing ring; wherein, the cover plate is formed with a first mounting through-hole, the pole fixing member is mounted in the first mounting through-hole, and both ends of the pole fixing member extend to the inner side and the outer side of the cover plate respectively; The pole, the first insulating member, and the sealing ring are all sleeved outside the pole fixing member, and the first insulating member is arranged between the pole and the cover plate, the sealing ring is arranged at the inner opening of the mounting through-hole, and is compressed between the inner side of the cover plate and the pole; the pole fixing member, the first insulating member, and the pole enclose an air guiding channel, and one end of the air guiding channel extends to the sealing ring, and the other end of the air guiding channel is communicated with the outside.

2. The battery cover assembly according to claim 1, wherein The first insulating member is formed with a second mounting through-hole, and is sleeved outside the pole fixing member through the second mounting through-hole; The air guiding channel includes a first air guiding channel and a second air guiding channel which are communicated with each other, and the first air guiding channel is formed between the hole wall of the second mounting through-hole and the side wall of the pole fixing member, and the first air guiding channel extends to the sealing ring; The second air guiding channel is formed between the first insulating member and the pole, and the second air guiding channel is communicated with the outside.

3. The battery cover assembly according to claim 2, characterized in that, The hole wall of the second mounting through-hole is formed with a first air guiding groove.

4. The battery cover assembly according to claim 3, characterized in that, The first insulating member is formed with a first fitting surface, the pole is formed with a second fitting surface, and the first fitting surface is matched with the second fitting surface. The first fitting surface and / or the second fitting surface are formed with a second total air guiding groove, a gas guiding gap is further formed between the first fitting surface and the second fitting surface, and the second total air guiding groove is respectively communicated with the first air guiding groove and the gas guiding gap.

5. The battery cover assembly according to claim 4, wherein, The pole is formed with a fitting boss, the first insulating member is formed with a fitting groove, and the fitting boss is mounted in the fitting groove; the second total air guiding groove is formed on the outer wall of the fitting boss and / or the inner wall of the fitting groove.

6. The battery cover assembly according to claim 5, wherein, The second total air guiding groove includes a second air guiding groove and a third air guiding groove, the second air guiding groove is formed on the bottom wall of the fitting boss and / or the fitting groove, the third air guiding groove is formed on the side wall of the fitting boss and / or the fitting groove, the gas guiding gap is formed between the structure on the outer periphery of the fitting boss and the structure on the outer periphery of the fitting groove, and the first air guiding groove, the second air guiding groove, the third air guiding groove, the gas guiding gap, and the outside are sequentially communicated.

7. The battery cover assembly according to claim 6, wherein The number of the first air guiding grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the second mounting through-hole; The number of the second air guiding grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the fitting boss; the number of the third air guiding grooves is multiple, and they are sequentially arranged at intervals along the circumferential direction of the fitting groove; the number of the multiple first air guiding grooves, the number of the multiple second air guiding grooves, and the number of the multiple third air guiding grooves are equal and correspond to each other one by one; and / or The terminal post is formed with a third mounting through-hole, and the third mounting through-hole penetrates through the assembly boss, and one end of the second air guide groove is communicated with the third mounting through-hole, and the other end of the second air guide groove penetrates through the side wall of the assembly boss; and / or One end of the third air guide groove extends to the bottom of the assembly groove, and the other end of the third air guide groove extends to the opening of the assembly groove.

8. The battery cover assembly according to claim 5, wherein, The assembly boss is a non-rotary body structure; and / or Along the direction from the inner side to the outer side of the cover plate, the height of the assembly boss is greater than the depth of the assembly groove.

9. The battery cover assembly according to claim 1, wherein, The first insulating member is formed with an insulating protrusion, and the insulating protrusion is installed in the first mounting through-hole, extends towards the sealing ring, and abuts against the sealing ring.

10. The battery cover assembly according to claim 9, wherein, The cover plate is formed with a positioning groove, the first insulating member is formed with a positioning protrusion located on the outer periphery of the insulating protrusion, and the positioning protrusion is installed in the positioning groove.

11. The battery cover plate assembly according to claim 10, wherein, The positioning protrusion is a non-rotary body structure.

12. The battery cover plate assembly according to any one of claims 1 to 11, characterized in that, The terminal post is formed with a riveting counterbore, and after the terminal post fixing member is riveted to the terminal post, the end of the terminal post fixing member forms a limiting platform adapted to the riveting counterbore; and / or The terminal post fixing member includes a bottom plate and a column body connected to each other, and the column body passes through the first mounting through-hole, and both ends of the column body extend to the inner side and the outer side of the cover plate respectively; the bottom plate is located on the inner side of the cover plate, and the bottom plate is connected to one end of the column body located on the inner side of the cover plate.

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