Insulating member and battery cover plate assembly

Abstract

The application relates to the technical field of batteries, in particular to an insulating component and a battery cover plate assembly. The insulating component is formed with a limiting protruding part protruding towards the pole core side, and the limiting protruding part is formed with an exhaust cavity. The insulating component is formed with an exhaust through hole, and an exhaust passage is formed between the limiting protruding part and the exhaust through hole. Along a direction perpendicular to a first preset direction, the side wall of the limiting protruding part is formed with a first air inlet hole and an exhaust hole, the exhaust hole is arranged close to the exhaust passage side and is in communication with the exhaust passage, the gas generated by the pole core under the thermal runaway condition can enter the exhaust cavity through the first air inlet hole, is discharged to the exhaust passage through the exhaust hole, and is discharged through the exhaust through hole. It can be seen that the first air inlet hole, the exhaust cavity, the exhaust hole, the exhaust passage and the exhaust through hole form a lateral exhaust path, so that when the exhaust structure opposite to the pole core is blocked, the exhaust path can still be used for exhaust, and the safety and reliability are higher.

Description

Technical Field

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

[0002] Currently, when a battery experiences thermal runaway, various gases are released internally, causing a sudden increase in internal pressure. This triggers a safety valve on the cover to release the gases, preventing accidents and ensuring the battery's safety and reliability during use. However, current venting structures primarily utilize the lower plastic layer beneath the cover, often featuring venting channels. These channels are often limited and ineffective, especially when the battery's internal core blocks these channels, hindering rapid venting and compromising safety and reliability. Utility Model Content

[0003] The purpose of this application is to provide an insulating component and a battery cover assembly, which to a certain extent solves the technical problems existing in the prior art where, when the battery experiences thermal runaway, it relies solely on the venting channel on the lower plastic under the cover for venting. This venting channel is singular and has poor venting effect. In particular, when the venting channel on the lower plastic is blocked by internal structural components or substances of the battery, it will lead to the inability to vent quickly, thus failing to guarantee safety and reliability.

[0004] This application provides an insulating member having a limiting protrusion protruding along a first preset direction and toward the electrode core side, and the limiting protrusion having an exhaust cavity; the insulating member having an exhaust through hole, and an exhaust channel being formed between the limiting protrusion and the exhaust through hole along a direction perpendicular to the first preset direction; Along a direction perpendicular to the first preset direction, the sidewall of the limiting protrusion is formed with a first air inlet and an exhaust port that communicate with the exhaust chamber. The exhaust port is located near the exhaust channel and communicates with the exhaust channel. The gas generated by the electrode core under thermal runaway can enter the exhaust chamber through the first air inlet, be discharged to the exhaust channel through the exhaust port, and be discharged through the exhaust port.

[0005] In the above technical solution, further, along the length direction of the insulating member, the first air inlet is formed on the side wall of the limiting protrusion away from the exhaust channel; and / or along the width direction of the insulating member, at least one side wall of the limiting protrusion is formed with the first air inlet.

[0006] In any of the above technical solutions, further, along the length direction of the insulating member, at least one side of the insulating member is formed with the limiting protrusion, and each of the limiting protrusions is formed with the exhaust chamber, the first air inlet and the exhaust port.

[0007] In any of the above technical solutions, the insulating member further comprises an exhaust groove protruding toward the electrode core side, and the opening of the exhaust groove is disposed away from the electrode core side. Along the first preset direction, the exhaust groove is correspondingly disposed and connected to the exhaust through hole, and the exhaust groove is disposed close to the electrode core side relative to the exhaust through hole. Along the first preset direction, a first auxiliary exhaust through hole is formed on the bottom wall of the exhaust groove. The exhaust channel is formed between the exhaust groove and the limiting protrusion.

[0008] In any of the above technical solutions, a portion of the projection of the exhaust through hole along the first preset direction is located outside the projection of the exhaust groove along the first preset direction and is disposed close to the exhaust channel side.

[0009] In any of the above technical solutions, further, along a direction perpendicular to the first preset direction, at least one side wall of the exhaust groove is formed with a second auxiliary exhaust through hole.

[0010] In any of the above technical solutions, the second auxiliary exhaust through hole is further formed on the side wall of the exhaust groove near the exhaust channel.

[0011] In any of the above technical solutions, further, along the first preset direction, the bottom wall of the limiting protrusion is formed with a second air inlet that communicates with the exhaust chamber and the outside.

[0012] In any of the above technical solutions, a reinforcing rib is further formed in the exhaust cavity, and the reinforcing rib avoids the path connecting the first air inlet and the exhaust port.

[0013] In any of the above technical solutions, the first preset direction is further defined as the thickness direction of the insulating component.

[0014] This application also provides a battery cover assembly, including a cover plate, an explosion-proof valve, and an insulating member as described in any of the above technical solutions. The insulating member is installed on the inner side of the cover plate near the electrode core. The cover plate has explosion-proof valve mounting holes extending through both sides along a first preset direction, and the explosion-proof valve is installed in the explosion-proof valve mounting holes. Furthermore, along the first preset direction, vent holes on the insulating member are correspondingly provided and connected to the explosion-proof valve. Therefore, it possesses all the beneficial technical effects of this insulating member, which will not be elaborated further here.

[0015] In the above technical solution, further, an exhaust groove is formed on the side of the cover plate near the insulating member, and a portion of the projection of the exhaust groove along the first preset direction is located within the projection of the insulating member along the first preset direction, while the other portion of its projection is located outside the projection of the insulating member along the first preset direction.

[0016] In any of the above technical solutions, one end of the exhaust groove is located close to the explosion-proof valve mounting hole and the two are kept at a preset distance, or one end of the exhaust groove is connected to the explosion-proof valve mounting hole.

[0017] In any of the above technical solutions, further, one end of the exhaust groove away from the explosion-proof valve mounting hole extends through the corresponding edge of the cover plate.

[0018] In any of the above technical solutions, further, along the length direction of the cover plate, at least one side of the explosion-proof valve mounting through hole is provided with the exhaust groove.

[0019] In any of the above technical solutions, further, along the width direction of the cover plate, at least one side of the explosion-proof valve mounting through hole is provided with the exhaust groove.

[0020] In any of the above technical solutions, the exhaust groove is further connected to the exhaust chamber.

[0021] In any of the above technical solutions, the exhaust groove is further connected to the exhaust through hole.

[0022] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a novel insulating component, which is provided with a limiting protrusion for pressing the electrode core, an exhaust channel and an exhaust orifice for venting. The limiting protrusion is provided with an exhaust chamber and a first air inlet and an exhaust orifice on the side connected to the exhaust chamber. This forms an exhaust path perpendicular to a first preset direction, such as the side. This allows gas generated by thermal runaway of the electrode core to be conducted through the air channel originally formed between the insulating component and the shell to the first air inlet of the limiting protrusion, enter the exhaust chamber through the first air inlet, and then be discharged to the exhaust channel through the exhaust orifice. The gas flows along the exhaust channel to the exhaust orifice, at which point the pressure relief valve on the cover plate corresponding to the exhaust orifice opens, thereby venting the gas. This can be combined with the existing exhaust orifice along the first preset direction, such as the vertical direction, to accelerate the exhaust speed and improve the exhaust effect. Especially when the exhaust orifice along the first preset direction, such as the vertical direction, is blocked, it can be vented normally through the side exhaust path, thereby ensuring the safety and reliability of the battery during use. In addition, this application provides a novel cover plate with venting grooves, which can be used to vent during thermal runaway. It can be seen that a new venting channel is added on the basis of the venting structure of the insulating component, which greatly improves the venting effect during thermal runaway. In particular, when some venting structures on the insulating component are blocked by structural components or substances inside the battery, the venting grooves on the cover plate can vent normally, which helps to improve the venting effect. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the structure of the insulating component provided in the embodiments of this application; Figure 2 for Figure 1 A partially enlarged structural diagram; Figure 3 for Figure 1 Another enlarged schematic diagram of the structure; Figure 4 for Figure 1 Another enlarged schematic diagram of the structure; Figure 5 This is another structural schematic diagram of the insulating component provided in the embodiments of this application; Figure 6 for Figure 5 A partially enlarged structural diagram; Figure 7 for Figure 5 Another enlarged schematic diagram of the structure; Figure 8 Another structural schematic diagram of the insulating component provided in the embodiments of this application; Figure 9 for Figure 8 A partially enlarged structural diagram; Figure 10 An assembly drawing of the cover plate and insulating components provided in an embodiment of this application; Figure 11 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 12 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 13 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 14 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 15 This is a schematic diagram of the structure of the cover plate provided in an embodiment of this application; Figure 16 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 17 for Figure 16 A partially enlarged structural diagram; Figure 18 for Figure 17 A magnified structural diagram at point A; Figure 19 Another assembly drawing of the cover plate and insulating components provided in the embodiments of this application; Figure 20 for Figure 19 A partially enlarged structural diagram.

[0025] Figure label: 1-Cover plate, 11-Explosion-proof valve mounting hole, 12-Exhaust groove, 13-Sealing part, 14-Matching part, 2-Insulating component, 21-Limiting protrusion, 211-First air inlet, 212-Exhaust chamber, 213-Exhaust hole, 214-Second air inlet, 215-Reinforcing rib, 22-Exhaust through hole, 23-Exhaust groove, 231-First auxiliary exhaust through hole, 232-Second auxiliary exhaust through hole, 24-Exhaust channel, 3-Explosion-proof valve, 4-Air passage, a-First preset direction. Detailed Implementation 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] The following reference Figures 1 to 20 This application describes an insulating member and a battery cover assembly according to some embodiments.

[0031] Example 1 See Figures 1 to 14 As shown, an embodiment of this application provides an insulating member 2, which has a limiting protrusion 21 protruding along a first preset direction a and toward the pole core side, and the limiting protrusion 21 has an exhaust cavity 212; the insulating member 2 has an exhaust through hole 22, and an exhaust channel 24 is formed between the limiting protrusion 21 and the exhaust through hole 22, which is arranged perpendicular to the first preset direction a; Along a direction perpendicular to the first preset direction a, the sidewall of the limiting protrusion 21 is formed with a first air inlet 211 and an exhaust port 213 that communicate with the exhaust chamber 212. The exhaust port 213 is located near the exhaust channel 24 and communicates with the exhaust channel 24. The gas generated by the electrode core under thermal runaway can enter the exhaust chamber 212 through the first air inlet 211, and be discharged to the exhaust channel 24 through the exhaust port 213, and be discharged through the exhaust through hole 22.

[0032] As can be seen from the structure described above, this application provides a novel insulating member 2, which is provided with a limiting protrusion 21 for pressing the electrode core, an exhaust channel 24 for exhaust, and an exhaust through hole 22. The limiting protrusion 21 is provided with an exhaust chamber 212 and a first air inlet 211 and an exhaust hole 213 on its side, which are connected to the exhaust chamber 212. This forms an exhaust path perpendicular to a first preset direction a, such as laterally, allowing the gas generated by thermal runaway of the electrode core to be conducted through the air passage 4 originally formed between the insulating member 2 and the shell to the first air inlet 211 of the limiting protrusion 21. The gas enters the exhaust chamber 212 through the first air inlet 211 and then exits through the air outlet to the exhaust channel 24. The gas flows along the exhaust channel 24 to the exhaust through hole 22. At this time, the pressure relief valve on the cover plate 1 corresponding to the exhaust through hole 22 opens, thereby venting the gas. This can then be combined with the existing exhaust holes 213 along the first preset direction a, such as the vertical direction, to speed up the exhaust and improve the exhaust effect. In particular, when the exhaust holes 213 along the first preset direction a, such as the vertical direction, are blocked, the gas can be vented normally through the side exhaust path, thereby ensuring the safety and reliability of the battery during use.

[0033] Furthermore, preferably, the first preset direction a is the thickness direction of the insulating member 2. Of course, it is not limited to this and can be selected according to actual needs.

[0034] In addition, it should be noted that: preferably, both the insulating member 2 and the cover plate 1 described below are rectangular structures to meet conventional usage requirements, and both have the same length, width and thickness directions. Of course, this is not the only option, and other options can be selected according to actual needs.

[0035] In this embodiment, preferably, as follows: Figure 1 , Figure 4 and Figure 20As shown, along the length of the insulating member 2, a first air inlet 211 is formed on the side wall of the limiting protrusion 21 away from the exhaust passage 24. This allows the gas accumulated in the side air passage 4 originally formed between the insulating member 2 and the housing to enter the first air inlet 211 nearby, which helps to discharge the gas at the end. Of course, it is not limited to this. Other structures can also be used. For example, at least one side wall of the limiting protrusion 21 is formed with a first air inlet 211 along the width of the insulating member 2. Alternatively, the first air inlet 211 can be formed on the side of the limiting protrusion 21 away from the exhaust passage 24 along the length of the insulating member 2, and at least one side of the limiting protrusion 21 is formed with a first air inlet 211 along the width of the insulating member 2. The specific choice depends on the actual needs.

[0036] In this embodiment, preferably, as follows: Figure 1 As shown, along the length of the insulating member 2, both sides of the insulating member 2 are provided with limiting protrusions 21, and each limiting protrusion 21 is provided with an exhaust chamber 212, a first air inlet 211 and an exhaust port 213. As described above, limiting protrusions 21 are provided at both ends of the insulating member 2 to press and limit the two ends of the electrode core, preventing the electrode core from shifting. Furthermore, both limiting protrusions 21 are designed with an exhaust chamber 212, a first air inlet 211, and an exhaust port 213 to facilitate exhaust from both ends. It should be noted that limiting protrusions 21 can also be provided on only one side, while other types of pressing structures can be provided on the other side. In this embodiment, preferably, as follows: Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the insulating member 2 has an exhaust groove 23 protruding toward the pole core side, and the opening of the exhaust groove 23 is disposed away from the pole core side. Along the first preset direction a, the exhaust groove 23 is disposed corresponding to and connected to the exhaust through hole 22, and the exhaust groove 23 is disposed close to the pole core side relative to the exhaust through hole 22. Along the first preset direction a, the bottom wall of the exhaust groove 23 has a first auxiliary exhaust through hole 231. An exhaust channel 24 is formed between the exhaust groove 23 and the limiting protrusion 21. As can be seen from the structure described above, an exhaust groove 23 and a corresponding first auxiliary exhaust through hole 231 are provided above the electrode core. The exhaust groove 23 is protruding on the side near the electrode core. It can not only limit the electrode core, but also exhaust the electrode core when it is thermally runaway. It increases the area of ​​the exhaust area and helps to improve the exhaust effect. In this embodiment, preferably, as follows: Figures 1 to 3As shown, a portion of the projection of the exhaust through hole 22 along the first preset direction a is located outside the projection of the exhaust groove 23 along the first preset direction a, and is disposed near the exhaust passage 24. As can be seen from the structure described above, the exhaust groove 23 does not completely block the exhaust port 22. The exhaust port 22 extends to the side of the exhaust groove 23 near the exhaust channel 24, so as not to affect the normal exhaust of the exhaust path on the side. In this embodiment, preferably, as follows: Figure 3 and Figure 6 As shown, at least one side wall of the exhaust groove 23 is formed with a first auxiliary exhaust through hole 231 along a direction perpendicular to the first preset direction a. As can be seen from the structure described above, the first auxiliary exhaust hole 231 is provided on the side of the exhaust groove 23, which helps to discharge the gas accumulated on the side and increases the exhaust path. In this embodiment, preferably, as follows: Figure 3 and Figure 6 As shown, a second auxiliary exhaust hole 232 is formed on the side wall of the exhaust groove 23 near the exhaust channel 24, which allows the gas in the exhaust channel 24 to be quickly discharged. It should be noted that the second auxiliary exhaust hole 232 is not limited to being provided only on the side wall of the exhaust groove 23 near the exhaust channel 24, but can also be provided on other sides of the exhaust groove 23. For example, the second auxiliary exhaust hole 232 can be provided on at least one side wall of the exhaust groove 23 along the width direction of the insulating member 2, or the second auxiliary exhaust hole 232 can be provided on at least one side wall of the exhaust groove 23 along the width direction of the insulating member 2 and along the length direction of the insulating member 2, depending on the actual needs.

[0037] In this embodiment, preferably, as follows: Figure 1 , Figure 7 and Figure 9 As shown, along the first preset direction a, the bottom wall of the limiting protrusion 21 is formed with a second air inlet 214 that communicates with the exhaust chamber 212 and the outside. As can be seen from the structure described above, a second air inlet 214 is provided directly above the electrode core along the first preset direction a, such as the height direction of the electrode core, so that exhaust can be achieved when the electrode core experiences thermal runaway. In this embodiment, preferably, as follows: Figure 7 As shown, a reinforcing rib 215 is formed inside the exhaust chamber 212, which serves to increase the strength of the limiting protrusion 21, but is not limited to this.

[0038] Furthermore, preferably, the reinforcing rib 215 avoids the path connecting the first air inlet 211 and the exhaust port 213, thereby ensuring normal exhaust from the side. Furthermore, preferably, there are multiple reinforcing ribs 215, which are arranged sequentially at intervals along the width direction of the insulating member 2.

[0039] Example 2 See Figures 10 to 20 As shown, Embodiment 2 of this application also provides a battery cover assembly, including the insulating member 2 described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the insulating member 2. The same technical features and beneficial effects will not be repeated here.

[0040] In this embodiment, preferably, as follows: Figures 10 to 20 As shown, the battery cover assembly also includes a cover plate 1 and an explosion-proof valve 3; wherein, the insulating component 2 is installed on the inner side of the cover plate 1 near the electrode core; The cover plate 1 has an explosion-proof valve mounting through hole 11 extending through both sides along the first preset direction a, and the explosion-proof valve 3 is installed in the explosion-proof valve mounting through hole 11. Furthermore, along the first preset direction a, the exhaust through hole 22 on the insulating member 2 is correspondingly provided and connected to the explosion-proof valve 3. As described above, the insulating member 2 is provided with a limiting protrusion 21 for pressing the electrode core, an exhaust channel 24 for venting, and an exhaust through hole 22. The limiting protrusion 21 is provided with an exhaust chamber 212 and a first air inlet 211 and an exhaust hole 213 on its side, which are connected to the exhaust chamber 212. This forms an exhaust path perpendicular to a first preset direction a, such as laterally. Consequently, the gas generated by thermal runaway of the electrode core can be conducted through the air passage 4 originally formed between the insulating member 2 and the housing to the first air inlet 211 of the limiting protrusion 21, and then... The gas enters the exhaust chamber 212 through the vent 211 and then exits through the vent to the exhaust channel 24. The gas flows along the exhaust channel 24 to the exhaust through hole 22. At this time, the pressure relief valve on the cover plate 1 corresponding to the exhaust through hole 22 opens, thereby venting the gas. This can then be combined with the existing exhaust hole 213 along the first preset direction a, such as the vertical direction, to speed up the exhaust and improve the exhaust effect. In particular, when the exhaust hole 213 along the first preset direction a, such as the vertical direction, is blocked, it can be vented normally through the side exhaust path, thereby ensuring the safety and reliability of the battery during use. In this embodiment, preferably, as follows: Figures 15 to 20As shown, an exhaust groove 12 is formed on the side of the cover plate 1 near the insulating member 2. A portion of the projection of the exhaust groove 12 along the first preset direction a is located within the projection of the insulating member 2 along the first preset direction a, and the other portion of its projection is located outside the projection of the insulating member 2 along the first preset direction a. That is, the other portion of its projection is located outside the projection of the insulating member 2 and close to the side of the housing. It can be seen that the portion of the exhaust groove 12 on the cover plate 1 near the edge of the cover plate 1 is not blocked by the insulating member 2. Therefore, this portion of the exhaust groove 12 can be connected to the air passage 4 originally formed between the side wall of the housing and the side wall of the insulating member 2, thereby allowing exhaust to be vented from the side. As can be seen from the structure described above, this application provides a novel cover plate 1 with an exhaust groove 12 on the cover plate 1, which can then be used for exhaust during thermal runaway. It can be seen that, based on the exhaust structure of the insulating member 2, a new exhaust channel 24 has been added, which greatly improves the exhaust effect during thermal runaway. In particular, when some exhaust structures on the insulating member 2 are blocked by internal structural components or substances of the battery, the exhaust groove 12 on the cover plate 1 can exhaust normally, which helps to improve the exhaust effect.

[0041] In this embodiment, preferably, as follows: Figure 15 As shown, one end of the exhaust groove 12 is positioned close to the explosion-proof valve mounting hole 11 and the two are kept at a preset distance, or one end of the exhaust groove 12 is connected to the explosion-proof valve mounting hole 11. As can be seen from the structure described above, one end of the exhaust groove 12 is set close to the explosion-proof valve mounting through hole 11 and the two are kept at a preset distance. That is to say, the exhaust groove 12 is not connected to the explosion-proof valve mounting through hole 11 at this time. The advantage of this structure is that it will not affect the welding of the explosion-proof valve 3 and the cover plate 1, ensuring the sealing of the welding joint and making it less likely to cause electrolyte leakage. It should be noted that: it is not limited to setting one end of the exhaust groove 12 close to the explosion-proof valve mounting hole 11 and maintaining a preset distance between them; other structures can also be used. For example, one end of the exhaust groove 12 can be connected to the explosion-proof valve mounting hole 11. In this embodiment, preferably, as follows: Figure 15 and Figure 18 As shown, the end of the exhaust groove 12 away from the explosion-proof valve mounting hole 11 extends through the corresponding edge of the cover plate 1, which allows for a wider range of exhaust and facilitates processing and manufacturing. Of course, it is not limited to this; the exhaust groove 12 may not extend through the edge of the cover plate 1, depending on the actual needs.

[0042] In this embodiment, preferably, as follows: Figure 15As shown, along the length of the cover plate 1, both sides of the explosion-proof valve mounting through hole 11 are provided with exhaust grooves 12, which can exhaust the gas accumulated in the air passages 4 on both sides of the insulating component 2. Of course, it is not limited to this, and exhaust grooves 12 can also be provided on only one side.

[0043] Furthermore, it should be noted that, not limited to the above, an exhaust groove 12 may also be provided on at least one side of the explosion-proof valve mounting through hole 11 along the width direction of the cover plate 1, or simultaneously an exhaust groove 12 may be provided on at least one side of the explosion-proof valve mounting through hole 11 along the length direction of the cover plate 1, and an exhaust groove 12 may also be provided on at least one side of the explosion-proof valve mounting through hole 11 along the width direction of the cover plate 1.

[0044] In this embodiment, preferably, as follows: Figure 18 and Figure 20 As shown, the exhaust groove 12 is connected to the exhaust chamber 212. By connecting the exhaust groove 12 to the exhaust chamber 212 on the insulating component 2, the gas in the exhaust chamber 212 can also enter the exhaust groove 12, thereby increasing the exhaust path and helping to improve the exhaust effect. Of course, it is not limited to this. The exhaust groove 12 can also be staggered with the exhaust chamber 212 and the two are not connected. The specific choice depends on the actual needs. In this embodiment, preferably, as follows: Figure 13 As shown, the exhaust groove 12 is connected to the exhaust port 22. Since both are used to guide the gas to the explosion-proof valve 3 for discharge, they converge and connect in this area, which helps to improve the exhaust effect. Of course, it is not limited to this; the two can also be disconnected, depending on the actual needs.

[0045] In this embodiment, preferably, as follows: Figure 20 As shown, the cover plate 1 includes a sealing portion 13 and a mating portion 14 connected to each other. The mating portion 14 is disposed on the inner side of the sealing portion 13 near the electrode core. The projection of the mating portion 14 along the thickness direction of the cover plate 1 falls completely into the projection of the sealing portion 13 along the thickness direction of the cover plate 1, and a gap is formed between the two projections. The exhaust groove 12 is formed on the inner side of the mating portion 14 near the electrode core.

[0046] As can be seen from the structure described above, the mating part 14 is inserted into the opening of the shell and mates with the side wall of the shell, while the cover part 13 is located outside the shell and completely blocks the opening of the shell, thereby achieving the sealing of the shell. Since the mating part 14 is located inside the shell, an exhaust groove 12 is opened on the mating part 14 to achieve exhaust in case of thermal runaway.

[0047] Of course, the structure of cover plate 1 is not limited to this; cover plate 1 may also include only the sealing part 13, etc. The specific choice depends on the actual needs.

[0048] It should be noted that: Figure 20 The dashed line represents the position of the side wall of the housing, mainly to show the original air passage 4 formed between the side wall of the insulating member 2 and the side wall of the housing. 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. An insulating component, characterized in that, The insulating member has a limiting protrusion that protrudes along a first preset direction toward the pole core side, and the limiting protrusion has an exhaust cavity; the insulating member has an exhaust through hole, and an exhaust channel is formed between the limiting protrusion and the exhaust through hole along a direction perpendicular to the first preset direction. Along a direction perpendicular to the first preset direction, the sidewall of the limiting protrusion is formed with a first air inlet and an exhaust port that communicate with the exhaust chamber. The exhaust port is located near the exhaust channel and communicates with the exhaust channel. The gas generated by the electrode core under thermal runaway can enter the exhaust chamber through the first air inlet, be discharged to the exhaust channel through the exhaust port, and be discharged through the exhaust port.

2. The insulating component according to claim 1, characterized in that, Along the length direction of the insulating member, the first air inlet is formed on the side wall of the limiting protrusion away from the exhaust channel; and / or along the width direction of the insulating member, at least one side wall of the limiting protrusion is formed with the first air inlet.

3. The insulating component according to claim 1, characterized in that, Along the length of the insulating member, at least one side of the insulating member is formed with the limiting protrusion, and each of the limiting protrusions is formed with the exhaust chamber, the first air inlet and the exhaust port.

4. The insulating member according to claim 1, characterized in that, The insulating member has an exhaust groove protruding toward the pole core side, and the opening of the exhaust groove is disposed away from the pole core side. Along the first preset direction, the exhaust groove is correspondingly disposed and connected to the exhaust through hole, and the exhaust groove is disposed close to the pole core side relative to the exhaust through hole. Along the first preset direction, a first auxiliary exhaust through hole is formed on the bottom wall of the exhaust groove. The exhaust channel is formed between the exhaust groove and the limiting protrusion.

5. The insulating member according to claim 4, characterized in that, A portion of the projection of the exhaust vent along the first preset direction is located outside the projection of the exhaust groove along the first preset direction and is positioned close to the exhaust channel side.

6. The insulating member according to claim 4, characterized in that, Along a direction perpendicular to the first preset direction, at least one side wall of the exhaust groove is formed with a second auxiliary exhaust through hole.

7. The insulating member according to claim 6, characterized in that, The second auxiliary exhaust through hole is formed on the side wall of the exhaust groove near the exhaust channel.

8. The insulating member according to claim 1, characterized in that, Along the first preset direction, the bottom wall of the limiting protrusion is formed with a second air inlet that communicates with the exhaust chamber and the outside; and / or A reinforcing rib is formed within the exhaust chamber, and the reinforcing rib avoids the path connecting the first air inlet and the exhaust outlet; and / or The first preset direction is the thickness direction of the insulating component.

9. A battery cover assembly, characterized in that, The device includes a cover plate, an explosion-proof valve, and an insulating member as described in any one of claims 1 to 8; wherein the insulating member is installed on the inner side of the cover plate near the pole core; the cover plate has an explosion-proof valve mounting through hole extending through both sides along the first preset direction, and the explosion-proof valve is installed in the explosion-proof valve mounting through hole, and along the first preset direction, an exhaust through hole on the insulating member is correspondingly provided and connected to the explosion-proof valve.

10. The battery cover assembly according to claim 9, characterized in that, An exhaust groove is formed on the side of the cover plate near the insulating member, and a portion of the projection of the exhaust groove along the first preset direction is located within the projection of the insulating member along the first preset direction, while the other portion of its projection is located outside the projection of the insulating member along the first preset direction. One end of the exhaust channel is located close to the installation hole of the explosion-proof valve and the two are kept at a preset distance, or one end of the exhaust channel is connected to the installation hole of the explosion-proof valve. The end of the exhaust groove that is away from the explosion-proof valve mounting hole passes through the corresponding edge of the cover plate; Along the length of the cover plate, at least one side of the explosion-proof valve mounting through hole is provided with the exhaust groove; Along the width direction of the cover plate, at least one side of the explosion-proof valve mounting through hole is provided with the exhaust groove; The exhaust channel is connected to the exhaust chamber; The exhaust groove is connected to the exhaust through hole.

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