CN218827682U - Explosion-proof valve, battery pack and vehicle - Google Patents
Explosion-proof valve, battery pack and vehicle Download PDFInfo
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- CN218827682U CN218827682U CN202222010071.2U CN202222010071U CN218827682U CN 218827682 U CN218827682 U CN 218827682U CN 202222010071 U CN202222010071 U CN 202222010071U CN 218827682 U CN218827682 U CN 218827682U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an explosion-proof valve, battery, group battery, battery package and vehicle, explosion-proof valve includes: explosion-proof valve body, enhancement layer. The explosion-proof valve body comprises a connecting portion and an opening portion, the connecting portion is connected to the outer periphery of the opening portion, the thickness of the opening portion is smaller than that of the connecting portion, and the reinforcing layer is connected to at least one side of the opening portion in the thickness direction. From this, at least one side of opening a thickness direction is connected with the enhancement layer, can increase the protection to opening a, so that explosion-proof valve before not reaching predetermined threshold value, can increase the protection to explosion-proof valve, increase explosion-proof valve's bearing capacity, avoid explosion-proof valve to open in advance, and when explosion-proof valve internal pressure increase needs the pressure release, the inside temperature of explosion-proof valve rises, the enhancement layer is heated the softening and can avoid influencing the normal of explosion-proof valve and open, so that explosion-proof valve has good performance.
Description
Technical Field
The utility model belongs to the technical field of the battery technique and specifically relates to an explosion-proof valve, battery, group battery, battery package and vehicle are related to.
Background
Among the prior art, the used explosion-proof valve of battery product is the explosion-proof valve of aluminium material for the vast majority, its effect is for can in time opening the pressure release under the battery is inside to appear abnormal conditions, guarantee the safety of electric core, because the explosion-proof valve need be oriented when the battery is unusual to be opened, reduce the influence to other systems, so the structural strength of opening the portion compares other structures comparatively weak, the weak condition fracture and other inefficacys of explosion-proof valve take place very easily, influence the normal use of explosion-proof valve, the security performance of battery can not be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model discloses a first aim at provides an explosion-proof valve, can form the protection to the portion of opening, increases explosion-proof valve's structural strength, can the pressure release when the thermal expansion.
A second object of the present invention is to provide a battery, including the above-mentioned explosion-proof valve.
A third object of the present invention is to provide a battery pack, including the above battery.
A fourth object of the present invention is to provide a battery pack, including the above battery or battery pack.
A fifth object of the present invention is to provide a vehicle, including the above battery pack or battery pack.
According to the utility model discloses explosion-proof valve of first aspect embodiment includes: the explosion-proof valve comprises an explosion-proof valve body and a reinforcing layer, wherein the explosion-proof valve body comprises a connecting part and an opening part, the connecting part is connected to the outer periphery of the opening part, the thickness of the opening part is smaller than that of the connecting part, and the reinforcing layer is connected to at least one side of the opening part in the thickness direction.
According to the utility model discloses an explosion-proof valve is connected with the enhancement layer in at least one side of opening a thickness direction, can increase the protection to opening a, so that explosion-proof valve before not reaching predetermined threshold value, can increase the protection to explosion-proof valve, increase the bearing capacity of explosion-proof valve, avoid explosion-proof valve to open in advance, and when explosion-proof valve internal pressure increases and needs the pressure release, the inside temperature of explosion-proof valve rises, the enhancement layer is heated and is softened and can avoid influencing the normal of explosion-proof valve and open, so that explosion-proof valve has good performance.
In some embodiments, a thickness of the opening portion is smaller than a thickness of the connecting portion, two surfaces in a thickness direction of the opening portion are a first surface and a second surface, respectively, the first surface is flush with one side surface in the thickness direction of the connecting portion, and the reinforcing layer is provided on at least one of the first surface and the second surface.
In some embodiments, when the reinforcing layer is provided on at least the first surface, the reinforcing layer includes a first reinforcing layer covering the first surface and extending to the connecting portion.
In some embodiments, the second surface has at least one score groove formed thereon, and the reinforcing layer includes a second reinforcing layer covering an inner wall surface of the score groove when the reinforcing layer is provided on at least the second surface.
In some embodiments, a side surface of the second reinforcing layer remote from the second surface is formed as a plane; or the thickness of the second reinforcing layer is equal everywhere.
In some embodiments, the minimum spacing of the score groove from the first surface is T 1 Said T is 1 Satisfies the following conditions: t is not less than 0.02mm 1 ≤0.18mm。
In some embodiments, the reinforcement layer has a thickness T 2 Said T is 2 Satisfies the following conditions: t is more than or equal to 0.003mm 2 ≤0.6mm。
In some embodiments, the thickness of the opening portion is T 3 Said T is 3 Satisfies the following conditions: t is not less than 0.1mm 3 ≤0.3mm。
In some embodiments, the reinforcing layer is a polyolefin layer.
According to the utility model discloses battery of second aspect embodiment, including casing and explosion-proof valve, be formed with the through-hole on the casing, the cooperation of explosion-proof valve is in through-hole department, the explosion-proof valve be any one of above-mentioned embodiment the explosion-proof valve.
According to the third aspect of the present invention, the battery pack comprises the battery described in the above embodiments.
According to the battery pack of the fourth aspect of the present invention, the battery pack includes the battery described in the above embodiment or the battery pack described in the above embodiment.
According to the vehicle of the fifth aspect of the present invention, the battery pack or the battery pack of the above embodiments is included.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic sectional view of an explosion-proof valve according to a first embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Figure 3 is a schematic cross-sectional view of an explosion-proof valve according to a second embodiment of the invention.
Fig. 4 is an enlarged view of a portion B in fig. 2.
Figure 5 is a schematic cross-sectional view of an explosion-proof valve according to a third embodiment of the invention.
Fig. 6 is an enlarged view of portion C in fig. 5.
Fig. 7 is a schematic cross-sectional view of an explosion-proof valve according to a fourth embodiment of the present invention.
Fig. 8 is an enlarged view of a portion D in fig. 7.
Figure 9 is a schematic cross-sectional view of an explosion proof valve according to a fifth embodiment of the invention.
Fig. 10 is an enlarged view of a portion E in fig. 9.
Reference numerals:
an explosion-proof valve 100;
an explosion-proof valve body 10; a connecting portion 11; an opening section 12; a first surface 121; a second surface 122; a notching groove 13;
a reinforcing layer 20; a first reinforcing layer 21; a second reinforcing layer 22; a groove 23;
the thickness direction F.
Detailed Description
Embodiments of the present invention are described in detail below, the embodiments described with reference to the drawings are exemplary, and an explosion-proof valve 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 10, the explosion-proof valve 100 including: explosion-proof valve body 10, reinforcing layer 20. Here, the explosion-proof valve 100 is provided in the battery to increase the safety of the battery.
Specifically, as shown in fig. 1 to 6, the explosion-proof valve body 10 includes a connecting portion 11 and an opening portion 12, the connecting portion 11 is connected to an outer periphery of the opening portion 12, the opening portion 12 has a thickness smaller than that of the connecting portion 11, and the opening portion 12 is formed by recessing a side away from a center of the battery to a side adjacent to the center of the battery in a thickness direction F of the opening portion 12. The reinforcing layer 20 is attached to at least one side of the opening portion 12 in the thickness direction F, for example, the reinforcing layer 20 may be provided on one side of the explosion-proof valve body 10 away from the center of the battery or on one side adjacent to the center of the battery, or both sides of the explosion-proof valve body 10 in the thickness direction F may be provided with the reinforcing layer 20 at the same time, and the reinforcing layer 20 is opposed to at least the opening portion 12 in the thickness direction F. That is, an area of an orthographic projection of the reinforcing layer 20 in the thickness direction F of the explosion-proof valve body 10 may be equal to or larger than an area of an orthographic projection of the opening portion 12, and the shape of the reinforcing layer 20 may be the same as the shape of the opening portion 12. Alternatively, the area of the orthographic projection formed by the reinforcing layer 20 may be smaller than the area of the orthographic projection formed by the opening portion 12, and the reinforcing layer 20 protects the opening portion 12 and reduces the material usage.
According to the utility model discloses an explosion-proof valve 100, at least one side at opening 12 thickness direction F is connected with enhancement layer 20, can increase the protection to opening 12, so that explosion-proof valve 100 is before not reaching predetermined threshold value, can increase the protection to explosion-proof valve 100, increase explosion-proof valve 100's bearing capacity, avoid explosion-proof valve 100 to open in advance, and when explosion-proof valve 100 internal pressure increases and needs the pressure release, the inside temperature rise of explosion-proof valve 100, enhancement layer 20 is heated and is softened and can avoid influencing the normal opening of explosion-proof valve 100, so that explosion-proof valve 100 has good performance.
In some embodiments, as shown in fig. 6 and 10, two surfaces in the thickness direction F of the opening portion 12 are a first surface 121 and a second surface 122, respectively, the first surface 121 is flush with one side surface in the thickness direction F of the connecting portion 11, the second surface 122 is located on one side of the other side surface in the thickness direction F of the connecting portion 11 adjacent to the first surface 121, and the reinforcing layer 20 is provided on at least one of the first surface 121 and the second surface 122. For example, when the reinforcing layer 20 is disposed on the first surface 121, along the thickness direction F of the explosion-proof valve body 10, the distance between the first surface 121 and the second surface 122 is smaller than the distance between the two surfaces of the connecting portion 11, the side of the connecting portion 11 adjacent to the first surface 121 is located in the same plane as the first surface 121, the second surface 122 is closer to the first surface 121 than the side of the connecting portion 11 away from the first surface 121, and along the thickness direction F of the explosion-proof valve body 10, the thickness of the opening portion 12 is smaller than the thickness of the connecting portion 11, so as to realize the thinning process of the opening portion 12, so that the opening portion 12 can be opened smoothly. From this, first surface 121 and the one side surface parallel and level of connecting portion 11, second surface 122 is closer to first surface 121 relative to the other side surface of connecting portion 11, so that the one side that connecting portion 11 is close to second surface 122 can form and is equipped with the space that holds reinforcing layer 20, avoid reinforcing layer 20 to keep away from one side that first surface 121 is kept away from along one side that thickness direction F protrusion connecting portion 11 kept away from first surface 121, realize the frivolousness of explosion-proof valve body 10, increase the protection to explosion-proof valve body 10, reduce the occupation to the peripheral space of explosion-proof valve body 10, so that the surface smoothness of explosion-proof valve 100 is better, can realize the attenuate processing to opening 12 simultaneously, be convenient for opening of opening 12, increase the security of using explosion-proof valve 100.
Specifically, as shown in fig. 4, when the reinforcing layer 20 is provided at least on the first surface 121, the reinforcing layer 20 includes a first reinforcing layer 21, and the first reinforcing layer 21 covers the first surface 121 and extends to the connecting portion 11. Thereby, the first reinforcing layer 21 covers the first surface 121 and extends toward the connecting portion 11, thereby forming a cover for the first surface 121, increasing the structural strength of the opening portion 12, and at the same time, extending to the connecting portion 11, effectively preventing the explosion-proof valve 100 from being opened due to the weakness of the connecting area of the connecting portion 11 and the opening portion 12.
In some embodiments, as shown in fig. 2 and 6, the second surface 122 has at least one score groove 13 formed thereon, the score groove 13 may extend in a circumferential direction of the opening 12, and when the reinforcing layer 20 is provided at least on the second surface 122, the reinforcing layer 20 includes a second reinforcing layer 22, and the second reinforcing layer 22 covers an inner wall surface of the score groove 13. And one of the first reinforcing layer 21 and the second reinforcing layer 22 is disposed toward the center of the battery, for example, the first reinforcing layer 21 is disposed adjacent to the center of the battery, the vibration of the electrolyte may contact the first reinforcing layer 21 during the use of the battery, so the first reinforcing layer 21 is also required to have corrosion resistance to avoid corrosion thereof by the electrolyte. Therefore, the notch groove 13 can facilitate the opening portion 12 to smoothly open when reaching a preset pressure value, the second reinforcing layer 22 can increase the explosion pressure of the explosion-proof valve 100, the service life of the explosion-proof valve 100 is prolonged, and the situation that the internal pressure rises due to the oscillation of the electrolyte in the battery to cause the false opening of the explosion-proof valve 100 is avoided.
For example, as shown in fig. 2 and 8, when the second reinforcement layer 22 is disposed on the second surface 122 and the first reinforcement layer 21 is not disposed on the first surface 121, the second reinforcement layer 22 forms a cover over the second surface 122 and the score groove 13 formed on the second surface 122, increasing the structural strength of the second surface 122; as shown in fig. 6 and fig. 10, when the second reinforcing layer 22 is disposed on the second surface 122 and the first reinforcing layer 21 is disposed on the first surface 121, the second reinforcing layer 22 covers the second surface 122 and the score groove 13, and the first reinforcing layer 21 covers the first surface 121, so that the structural strength of the opening portion 12 can be increased on the first surface 121 and the second surface 122 at the same time, the explosion-proof valve 100 has increased explosion-proof pressure, the fatigue deformation of the opening portion 12 due to the internal pressure is reduced, the phenomenon that the internal pressure of the explosion-proof valve 100 is increased due to the shock impact of the electrolyte on the inner side of the explosion-proof valve 100 and the false opening occurs is avoided, and the service life of the explosion-proof valve 100 is prolonged.
Alternatively, as shown in fig. 2 and 6, the surface of the second reinforcement layer 22 on the side away from the second surface 122 is formed as a plane, and the second reinforcement layer 22 may be formed on the second surface 122 by painting or pasting, etc., so that the surface of the second reinforcement layer 22, i.e., the side away from the second surface 122, maintains flatness. The thickness of the second reinforcing layer 22 corresponding to the score groove 13 is greater than that of the remaining portion in the thickness direction F of the explosion proof valve 100. Alternatively, as shown in fig. 8 and 10, the thickness of the second reinforcing layer 22 is equal everywhere. In other words, the portion of the second reinforcing layer 22 opposite to the opening part 12 where the score groove 13 is provided has the same thickness as the portion where the score groove 13 is not provided, the portion of the second reinforcing layer 22 opposite to the score groove 13 is formed with the groove 23 opposite to the score groove 13, and the wall thickness of the groove 23 is the same as the wall thickness of the remaining portion of the second reinforcing layer 22. Therefore, the side of the second reinforcement layer 22 away from the second surface 122 may be a plane, or the thickness of the second reinforcement layer 22 may be equal everywhere, and the second reinforcement layer 22 may be specifically selected according to the manufacturing process and the requirement, so that the cost is reduced while the second reinforcement layer 22 is formed, and the process is simple and convenient.
In some embodiments, referring to fig. 2, score groove 13 has a minimum spacing T from first surface 121 1 May be the distance between the side of the score line 13 adjacent to the first surface 121 and the first surface 121, and T 1 Satisfies the following conditions: t is more than or equal to 0.02mm 1 Less than or equal to 0.18mm. E.g. T 1 =0.1mm. If the thickness of the bottom wall of the scoring groove 13 is less than 0.02mm, the bottom wall of the scoring groove 13 is too small, which may cause the opening portion 12 of the explosion-proof valve 100 to be opened by mistake, reduce the mass of the explosion-proof valve 100, and make the explosion-proof valve 100 have the possibility of practical effect; if the thickness of the bottom wall of the scored groove 13 is greater than 0.18mm, the explosion-proof valve 100 may not be smoothly opened through the opening portion 12 due to the excessively large thickness of the bottom wall of the scored groove 13, thereby increasing the risk of using the explosion-proof valve 100. Therefore, the thickness of the bottom wall of the score groove 13 is limited, so as to maintain the structural strength of the opening part 12 of the explosion-proof valve 100, avoid the influence of the reduction of the structural strength of the explosion-proof valve 100 caused by the arrangement of the score groove 13 on the smooth opening of the explosion-proof valve 100, and increase the opening part12 along the scored groove 13 and the safety of using the explosion proof valve 100.
In some embodiments, the reinforcement layer 20 has a thickness T 2 ，T 2 Satisfies the following conditions: t is more than or equal to 0.003mm 2 Less than or equal to 0.6mm. E.g. T 2 =0.1mm. The thicknesses of the first reinforcing layer 21 and the second reinforcing layer 22 may be the same or may be set to different thicknesses as necessary. For example, when the thickness of the reinforcing layer 20 is less than 0.003mm, the thickness of the reinforcing layer 20 is too small, which cannot effectively reduce the possibility of the erroneous opening of the explosion-proof valve 100 due to the weakness of the opening portion 12 of the explosion-proof valve 100; when the thickness of the reinforcing layer 20 is greater than 0.6mm, the thickness of the reinforcing layer 20 is too large, which results in too high structural strength of the explosion-proof valve 100, and affects normal opening of the explosion-proof valve 100 when the pressure inside the explosion-proof valve 100 reaches a preset value. Therefore, the thickness of the reinforcing layer 20 is limited to ensure that the reinforcing layer 20 can have the capacity of increasing the structural strength of the explosion-proof valve 100, the explosion-proof pressure of the explosion-proof valve 100 is increased, the deformation fatigue failure of the explosion-proof valve 100 caused by the internal air pressure can be effectively controlled in the normal use process, the cost for arranging the reinforcing layer 20 is controlled, the light weight of the explosion-proof valve 100 is formed, and the influence of the thickness of the reinforcing layer 20 on the opening of the opening part 12 is reduced.
In some embodiments, as shown in fig. 4, the thickness of the opening portion 12 is T 3 ，T 3 Satisfies the following conditions: t is not less than 0.1mm 3 Less than or equal to 0.3mm. E.g. T 3 =0.2mm. Therefore, the thickness of the opening part 12 is limited, so that the explosion-proof valve 100 can be opened smoothly, the weight of the explosion-proof valve 100 is reduced, and the use of materials is saved.
In some embodiments, the reinforcement layer 20 is a polyolefin layer. The polyolefin has rich raw materials, is easy to process and form and has lower temperature resistance. For example, the internal temperature of the explosion-proof valve 100 is softened when the internal temperature reaches 60 ° or more, the softened reinforcing layer 20 has almost no influence on the preset explosion pressure of the explosion-proof valve 100, and the influence generated by experiments can be controlled within 0.1 MPa; the explosion-proof valve 100 has high structural strength when the internal pressure is below 60 degrees. Therefore, the reinforcing layer 20 is a polyolefin layer, which can reduce the production cost of the explosion-proof valve 100, improve the product quality and the structural strength of the explosion-proof valve 100, and reduce the requirements on the processing technology when the reinforcing layer 20 is produced.
According to the second aspect of the present invention, the battery comprises a housing (not shown) and an explosion-proof valve 100, wherein a through hole is formed on the housing, the explosion-proof valve 100 is fitted at the through hole, and the explosion-proof valve 100 is the explosion-proof valve 100 of any one of the above embodiments.
Referring to fig. 1 to 10, a reinforcing layer 20 may be disposed on the first surface 121 and the second surface 122 of the opening 12 of the explosion vent 100, wherein the second reinforcing layer 22 may cover the second surface 122 of the opening 12, the first reinforcing layer 21 may form a cover of the first surface 121 of the opening 12, the second reinforcing layer 22 may be filled in the score groove 13 while the second reinforcing layer 22 is disposed, and a side of the second reinforcing layer 22 remote from the score groove 13 is disposed horizontally. Alternatively, the portion of the second reinforcing layer 22 opposite to the score line 13 is provided with a groove 23, and the wall thickness of the groove 23 corresponds to the thickness of the other portion of the second reinforcing layer 22, so as to achieve the equal thickness of the second reinforcing layer 22 everywhere. The explosion-proof valve 100 may be coupled by fitting with the through-hole and by welding.
According to the utility model discloses the battery, the explosion-proof valve 100 that its used have good structural strength, and in the battery normal use process, enhancement layer 20 can increase explosion-proof valve 100's structural strength, and when battery internal pressure rose, the temperature rose and need the pressure release, enhancement layer 20 can be because high temperature softens, and structural strength reduces, does not influence explosion-proof valve 100 and reaches the normal pressure release after predetermineeing the temperature, increases the security of using this explosion-proof valve 100's battery.
According to the third aspect of the present invention, the battery pack comprises the battery in the above embodiment.
According to the utility model discloses a group battery, the security that the group battery used can be increased to the battery among the above-mentioned.
According to the battery pack of the fourth aspect of the present invention, the battery pack includes the battery in the above-described embodiment or the battery pack in the above-described embodiment.
According to the utility model discloses a battery package can be through the security that increases battery or group battery, increases the security that the battery package used, and the inside pressure of battery risees when avoiding the battery package to use or receive the striking for a long time and causes the possibility of explosion.
According to a fifth aspect of the present invention, a vehicle includes the battery pack of the above embodiment or the battery pack of the above embodiment.
According to the utility model discloses a vehicle, through the security that increases group battery and battery package to make the vehicle have good security, avoid because the pressure release of battery package etc. does not in time lead to deflagration, reduce the use and the maintenance cost of vehicle.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. An explosion-proof valve, comprising:
the explosion-proof valve comprises an explosion-proof valve body and a valve body, wherein the explosion-proof valve body comprises a connecting part and an opening part, the connecting part is connected to the outer periphery of the opening part, and the thickness of the opening part is smaller than that of the connecting part;
a reinforcing layer connected to at least one side of the opening portion in a thickness direction.
2. The explosion proof valve as recited in claim 1 wherein both surfaces in the thickness direction of the opening portion are a first surface and a second surface, respectively, the first surface being flush with one side surface in the thickness direction of the connecting portion, and the reinforcing layer is provided on at least one of the first surface and the second surface.
3. The explosion proof valve of claim 2 wherein when said reinforcing layer is provided on at least said first surface,
the reinforcing layer includes a first reinforcing layer covering the first surface and extending to the connecting portion.
4. An explosion proof valve as defined in claim 2 wherein said second surface has at least one score groove formed thereon;
when the reinforcing layer is provided at least on the second surface, the reinforcing layer includes a second reinforcing layer covering an inner wall surface of the notch groove.
5. The explosion proof valve as recited in claim 4 wherein a side surface of the second reinforcing layer remote from the second surface is formed as a plane; or
The thickness of the second reinforcing layer is equal everywhere.
6. Explosion-proof valve according to claim 4, characterized in that the minimum distance of the score groove from the first surface is T 1 Said T is 1 Satisfies the following conditions: t is more than or equal to 0.02mm 1 ≤0.18mm。
7. Explosion-proof valve according to claim 1, characterized in that the thickness of the reinforcing layer is T 2 Said T is 2 Satisfies the following conditions: t is more than or equal to 0.003mm 2 ≤0.6mm。
8. Explosion-proof valve according to claim 1, characterized in that the thickness of the opening is T 3 Said T is 3 Satisfies the following conditions: t is more than or equal to 0.1mm 3 ≤0.3mm。
9. Explosion proof valve according to any of claims 1 to 8, characterized in that the reinforcement layer is a polyolefin layer.
10. A battery, comprising:
the shell is provided with a through hole;
an explosion-proof valve fitted at the through hole, the explosion-proof valve being in accordance with any one of claims 1-9.
11. A battery pack characterized by comprising the battery according to claim 10.
12. A battery pack comprising the battery according to claim 10 or the battery pack according to claim 11.
13. A vehicle characterized by comprising the battery pack according to claim 11 or the battery pack according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222010071.2U CN218827682U (en) | 2022-07-29 | 2022-07-29 | Explosion-proof valve, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222010071.2U CN218827682U (en) | 2022-07-29 | 2022-07-29 | Explosion-proof valve, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218827682U true CN218827682U (en) | 2023-04-07 |
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ID=87046309
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222010071.2U Active CN218827682U (en) | 2022-07-29 | 2022-07-29 | Explosion-proof valve, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218827682U (en) |
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2022
- 2022-07-29 CN CN202222010071.2U patent/CN218827682U/en active Active
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