CN219696510U - Battery with explosion-proof pressure release valve - Google Patents
Battery with explosion-proof pressure release valve Download PDFInfo
- Publication number
- CN219696510U CN219696510U CN202320974417.2U CN202320974417U CN219696510U CN 219696510 U CN219696510 U CN 219696510U CN 202320974417 U CN202320974417 U CN 202320974417U CN 219696510 U CN219696510 U CN 219696510U
- Authority
- CN
- China
- Prior art keywords
- explosion
- battery
- hollow cylinder
- proof pressure
- pressure relief
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000004880 explosion Methods 0.000 claims description 14
- 239000000243 solution Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The battery with the explosion-proof pressure relief valve comprises four through holes which are sequentially arranged at intervals, a negative pole column, the explosion-proof pressure relief valve, a liquid injection hole and a positive pole column are sequentially arranged in the four through holes, a plurality of connecting columns extend outwards from the outer side of the top of a first hollow cylinder body and are abutted against the inner wall of the hole, a first annular groove is formed in the bottom of the connecting column, a concave table is formed in the first hollow cylinder body, the concave table has a second diameter larger than the first inner diameter, and the concave table and the first hollow cylinder body share the top surface; the sealing ring is arranged on the bottom plate in an interference fit manner and is provided with a second annular groove positioned on the inner wall; the bottom support is assembled in the second annular groove, and a first limit groove is formed in the upper surface of the bottom support; one end of the spring is arranged in the first limiting groove, the cover plate is fixed on the concave table, and the cover plate comprises a second limiting groove and a plurality of pressure relief through holes, wherein the second limiting groove is arranged at the bottom to be connected with the other end of the spring; the rupture disc is secured to the first annular groove. The battery improves battery capacity, cycle life and safety.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a battery with an explosion-proof pressure release valve.
Background
The lithium ion battery has the advantages of high mass specific energy, long service life, high rated voltage, low self-discharge rate, environment friendliness and the like, and is widely applied to the fields of portable electronic equipment, electric automobiles and the like. Along with the development of battery technology, the application fields of various batteries are wider and wider, but because gas is generated in the process of charging and discharging the batteries, explosion can be possibly caused once the internal pressure of the batteries is continuously increased, and huge losses are caused to lives and properties of people.
The above information disclosed in the background section is only for enhancement of understanding of the background of the utility model and therefore may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The utility model aims to provide a battery with an explosion-proof pressure release valve, which has the composite functions of pressure release and explosion prevention, and when the pressure in the battery exceeds a certain range, the spring is compressed, redundant gas is discharged, and the capacity and the cycle life of the battery can be improved; when the battery is out of control, the internal air pressure rises sharply, the explosion-proof sheet can be broken directly, and meanwhile, the explosion-proof pressure release valve can also discharge redundant air, so that the safety of the battery is improved.
In order to achieve the above object, the present utility model provides the following technical solutions:
the battery with the explosion-proof pressure release valve comprises four through holes which are sequentially arranged at intervals, a negative pole column, the explosion-proof pressure release valve, a liquid injection hole and a positive pole column are sequentially arranged in the four through holes,
the explosion-proof pressure relief valve comprises a valve body,
a housing, which comprises a main body and a plurality of side bodies,
a first hollow cylinder having a first outer diameter and a first inner diameter,
a second hollow cylinder having a second outer diameter smaller than the first outer diameter and a second inner diameter smaller than the first inner diameter, the second hollow cylinder being concentric with the first hollow cylinder and extending downwardly from the bottom of the first hollow cylinder,
a bottom plate arranged on the second hollow cylinder body, the bottom plate is provided with an air inlet hole,
a plurality of exhaust holes which are arranged in the second hollow cylinder body and are higher than the bottom plate,
a plurality of connecting posts extending outwards from the outer side of the top of the first hollow cylinder body and abutting against the inner wall of the through hole,
a first annular groove arranged at the bottom of the connecting column,
a concave table arranged in the first hollow cylinder body, wherein the concave table is provided with a second diameter larger than the first inner diameter, and the concave table and the first hollow cylinder body share the top surface;
the sealing ring is arranged on the bottom plate in an interference fit manner and is provided with a second annular groove positioned on the inner wall;
the bottom support is assembled in the second annular groove, and a first limit groove is formed in the upper surface of the bottom support;
one end of the spring is arranged in the first limit groove,
the cover plate is fixed on the concave table and comprises a second limiting groove and a plurality of pressure relief through holes, wherein the second limiting groove is positioned at the bottom to be connected with the other end of the spring;
and the explosion-proof sheet is fixed on the first annular groove.
In the battery with the explosion-proof pressure release valve, the explosion-proof piece is of an annular structure and comprises an inner annular wall with a third inner diameter and an outer annular wall with a third outer diameter, and the annular structure is also provided with scores.
In the battery with the explosion-proof pressure release valve, the third inner diameter is equal to the first outer diameter, and the third outer diameter is the same as the inner diameter of the through hole.
In the battery with the explosion-proof pressure release valve, the nicks and the connecting columns are arranged in a staggered mode and are not intersected.
In the battery with the explosion-proof pressure relief valve, the connecting columns are symmetrically distributed relative to the central axis.
In the battery with the explosion-proof pressure release valve, the sealing ring is provided with an outer circular wall.
In the battery with the explosion-proof pressure release valve, the sealing ring is in interference fit with the shell, and the interference is 0.1-0.3 mm.
In the battery with the explosion-proof pressure release valve, the collet comprises a convex circular ring arranged in the second annular groove of the sealing ring and a first limiting groove positioned on the convex circular ring.
In the battery with the explosion-proof pressure relief valve, the cover plate is provided with a plurality of positioning holes, the shell is provided with a plurality of positioning blocks which are assembled and connected with the positioning holes, and the positioning blocks are in clearance fit with the positioning holes and the clearance is 0.05-0.1 mm.
In the battery with the explosion-proof pressure release valve, the second inner diameter of the second hollow cylinder body is gradually reduced along the vertical downward direction.
In the technical scheme, the battery with the explosion-proof pressure release valve has the following beneficial effects: the battery with the explosion-proof pressure release valve keeps the inside of the battery in a certain range, when the pressure in the battery exceeds a certain range, the spring is compressed, redundant gas is removed, and the capacity and the cycle life of the battery can be improved; when the battery is out of control, the internal air pressure rises sharply, the explosion-proof piece can be broken directly, and meanwhile, the pressure release valve can also discharge redundant air to assist the explosion-proof valve of the battery in exhausting, so that the safety of the battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic top view of a battery with an explosion-proof pressure release valve according to the present utility model.
Fig. 2 is a schematic cross-sectional view of an explosion relief valve of a battery with an explosion relief valve according to the present utility model.
Fig. 3 is a schematic diagram of a housing structure of an explosion-proof pressure relief valve of a battery with the explosion-proof pressure relief valve according to the present utility model.
Fig. 4 is a schematic diagram of a cover plate structure of a battery with an explosion-proof pressure release valve according to the present utility model.
Fig. 5 is a schematic cross-sectional structure of a seal ring of a battery with an explosion-proof pressure release valve according to the present utility model.
Fig. 6 is a schematic cross-sectional view of a battery bracket with an explosion-proof pressure release valve according to the present utility model.
Fig. 7 is a schematic cross-sectional view of a rupture disc with an explosion-proof pressure relief valve for a battery according to the present utility model.
Fig. 8 is a schematic sectional view of a battery case with an explosion-proof pressure release valve according to the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 8, in one embodiment, a battery with an explosion-proof pressure release valve of the present utility model includes four through holes spaced in sequence, a negative electrode post 1, an explosion-proof pressure release valve 2, a liquid injection hole 3 and a positive electrode post 4 are installed in sequence in the four through holes, wherein,
the explosion-proof pressure relief valve 2 comprises,
a housing 21, which includes,
a first hollow cylinder having a first outer diameter and a first inner diameter,
a second hollow cylinder having a second outer diameter smaller than the first outer diameter and a second inner diameter smaller than the first inner diameter, the second hollow cylinder being concentric with the first hollow cylinder and extending downwardly from the bottom of the first hollow cylinder,
a bottom plate 214 provided in the second hollow cylinder, the bottom plate 214 having an air intake hole 217,
a plurality of exhaust holes 212 provided in the second hollow cylinder and higher than the bottom plate 214,
a plurality of connecting posts 211 extending outwardly from the top outer side of the first hollow cylinder and abutting the inner wall of the through hole,
a first annular groove 216, which is provided at the bottom of the connecting column 211,
a concave stage 213 disposed in the first hollow cylinder, the concave stage 213 having a second diameter larger than the first inner diameter, the concave stage 213 and the first hollow cylinder being on a common top surface;
a seal ring 24, which is disposed on the bottom plate 214 in an interference fit manner, wherein the seal ring 24 has a second annular groove 241 located on the inner wall;
a bottom bracket 25 assembled to the second annular groove 241, wherein a first limit groove 251 is provided on an upper surface of the bottom bracket 25;
a spring 23, one end of which is arranged in the first limit groove 251,
the cover plate 22 is fixed on the concave table 213, and the cover plate 22 comprises a second limiting groove 222 and a plurality of pressure relief through holes 223 which are positioned at the bottom to be connected with the other end of the spring 23;
a rupture disc 26 secured to the first annular recess 216.
In the preferred embodiment of the battery with explosion relief valve, the rupture disk 26 is of annular configuration including an inner annular wall 261 of a third inner diameter and an outer annular wall 263 of a third outer diameter, the annular configuration further having a score 262.
In the preferred embodiment of the battery with the explosion-proof pressure release valve, the third inner diameter is equal to the first outer diameter, and the third outer diameter is the same as the inner diameter of the through hole.
In the preferred embodiment of the battery with explosion-proof pressure relief valve, the scores 262 and the connecting posts 211 are staggered and do not intersect.
In the preferred embodiment of the battery with explosion-proof pressure relief valve, the connecting posts 211 are symmetrically distributed with respect to the central axis.
In the preferred embodiment of the battery with an explosion-proof pressure relief valve, the seal 24 has an outer circular wall 242.
In the preferred embodiment of the battery with the explosion-proof pressure release valve, the sealing ring 24 is in interference fit with the housing 21, and the interference is 0.1-0.3 mm.
In the preferred embodiment of the battery with explosion relief valve, the shoe 25 includes a male ring 252 disposed within the second annular groove 241 of the seal 24 and a first limiting groove 251 located on the male ring 252.
In the preferred embodiment of the battery with the explosion-proof pressure release valve, the cover 22 is provided with a plurality of positioning holes 221, the housing 21 is provided with a plurality of positioning blocks 215 assembled and connected with the positioning holes 221, and the positioning blocks 215 are in clearance fit with the positioning holes 221 and have a clearance of 0.05 mm-0.1 mm.
In a preferred embodiment of the battery with explosion-proof pressure relief valve, the second inner diameter of the second hollow cylinder is gradually reduced in a vertically downward direction.
In one embodiment, the battery is a square shell battery, and the battery with the explosion-proof pressure release valve comprises a negative pole column 1, the explosion-proof pressure release valve 2, a liquid injection hole 3 and a positive pole column 4. The explosion-proof relief valve includes: the device comprises a shell 21, a cover plate 22, a spring 23, a sealing ring 24, a base 25 and a explosion-proof sheet 26. The housing 21 includes a connecting post 211, an exhaust hole 212, a recess 213, a bottom plate 214, a positioning block 215, an annular groove 216, and an intake hole 217. The cover plate 22 comprises a positioning hole 221, a second limiting groove 222 and a pressure relief through hole 223. The seal ring 24 includes a second annular groove 241 and an outer circumferential wall 242, and the shoe 25 includes a first limit groove 251 and a convex annular ring 252. The rupture disk 26 includes an inner annular wall 261, a score 262, and an outer annular wall 263. Further, the shoe 25 is assembled with the seal ring 24 with the convex ring 252 of the shoe disposed in the second annular groove 241 of the seal ring. Further, the assembled shoe 25 and gasket 24 rest on the bottom plate 214 of the housing 21. Further, the sealing ring 24 is made of neoprene rubber, the sealing ring 24 and the shell 21 are in interference fit, and the interference is 0.1-0.3 mm. Further, the spring 23 is placed inside the first limit groove 251 of the shoe 25. Further, the other section of the spring 23 is placed in the second limit groove 222 of the cover plate 22. Further, the diameter of the first limit groove 251 is the same as the diameter of the second limit groove 222 and is 0.5-1 mm larger than the diameter of the spring. Further, the pre-compression strength of the spring 23 is 0.1 to 0.3MPa. Further, 4 pressure relief through holes 223 are uniformly distributed on the cover plate 22, and the diameter is 0.5-1.5 mm. Further, 4 exhaust holes 212 are uniformly distributed on the shell 21, and the height of the bottoms of the exhaust holes higher than the bottom plate 214 is 0.2-0.3 mm. Further, the housing 21 is provided with two positioning blocks 215, and is assembled with two positioning holes 221 on the cover plate 22, and clearance fit is adopted, wherein the clearance is 0.05 mm-0.1 mm. Further, after the housing 21, the cover plate 22, the spring 23, the seal ring 24, and the shoe 25 are assembled in this order, the cover plate 22 is welded to the housing 21.
In one embodiment, the rupture disc 26 is placed within the first annular groove of the housing 21, and then both are welded by laser. Further, the explosion relief valve 2 is welded to the battery panel at four connecting posts 211 of the casing 21 and an outer ring 263 of the explosion-proof plate 26.
Further, when the square-shell battery with the explosion-proof pressure release valve is in use and the gas pressure in the battery is greater than the pre-compression strength (0.1-0.3 MPa) of the spring 23, the sealing ring 24 and the bottom support 25 shrink along with the spring 2, and the gas is discharged through the exhaust hole 212 and the pressure release through hole 223.
Further, after the gas in the battery is discharged, the pressure in the battery is reduced, the spring 23 ejects the bottom support 25 and the sealing ring 24 downwards, the sealing ring is in interference fit with the inside of the shell, the inside of the battery is sealed, and the air entering the inside of the battery is prevented from affecting the performance of the battery. Further, when thermal runaway occurs in the battery, the internal air pressure of the battery rises sharply, exceeding the pressure release capability of the pressure release valve, and the explosion can be performed directly through the score 262 of the explosion-proof sheet 26. Further, the battery capacity and the cycle life are improved; the pressure release valve can discharge redundant gas simultaneously, and the auxiliary battery explosion-proof valve is discharged, improves the battery security.
Finally, it should be noted that: the described embodiments are intended to be illustrative of only some, but not all, of the embodiments of the present utility model and, based on the embodiments herein, all other embodiments that may be made by those skilled in the art without the benefit of the present disclosure are intended to be within the scope of the present utility model.
While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. A battery with explosion-proof pressure release valve is characterized in that the battery comprises four through holes which are sequentially spaced, a negative pole column, the explosion-proof pressure release valve, a liquid injection hole and a positive pole column are sequentially arranged in the four through holes,
the explosion-proof pressure relief valve comprises a valve body,
a housing, which comprises a main body and a plurality of side bodies,
a first hollow cylinder having a first outer diameter and a first inner diameter,
a second hollow cylinder having a second outer diameter smaller than the first outer diameter and a second inner diameter smaller than the first inner diameter, the second hollow cylinder being concentric with the first hollow cylinder and extending downwardly from the bottom of the first hollow cylinder,
a bottom plate arranged on the second hollow cylinder body, the bottom plate is provided with an air inlet hole,
a plurality of exhaust holes which are arranged in the second hollow cylinder body and are higher than the bottom plate,
a plurality of connecting posts extending outwards from the outer side of the top of the first hollow cylinder body and abutting against the inner wall of the through hole,
a first annular groove arranged at the bottom of the connecting column,
a concave table arranged in the first hollow cylinder body, wherein the concave table is provided with a second diameter larger than the first inner diameter, and the concave table and the first hollow cylinder body share the top surface;
the sealing ring is arranged on the bottom plate in an interference fit manner and is provided with a second annular groove positioned on the inner wall;
the bottom support is assembled in the second annular groove, and a first limit groove is formed in the upper surface of the bottom support;
one end of the spring is arranged in the first limit groove,
the cover plate is fixed on the concave table and comprises a second limiting groove and a plurality of pressure relief through holes, wherein the second limiting groove is positioned at the bottom to be connected with the other end of the spring;
and the explosion-proof sheet is fixed on the first annular groove.
2. The battery with explosion relief valve according to claim 1, wherein the rupture disc is an annular structure comprising an inner annular wall of a third inner diameter and an outer annular wall of a third outer diameter, the annular structure further having a score.
3. A battery with explosion proof pressure relief valve according to claim 2, wherein the third inner diameter is equal to the first outer diameter, and the third outer diameter is the same as the inner diameter of the through hole.
4. A battery with explosion proof pressure relief valve according to claim 2, wherein said score and connecting post are staggered and non-intersecting.
5. A battery with explosion proof pressure relief valve according to claim 1, wherein the connecting posts are symmetrically distributed about a central axis.
6. A battery with explosion proof pressure relief valve according to claim 1, wherein said sealing ring has an outer circular wall.
7. The battery with the explosion-proof pressure release valve according to claim 1, wherein the sealing ring is in interference fit with the shell, and the interference is 0.1-0.3 mm.
8. The battery with explosion proof pressure relief valve according to claim 1, wherein the shoe includes a male ring disposed within the second annular groove of the seal ring and a first limit groove on the male ring.
9. The battery with the explosion-proof pressure release valve according to claim 1, wherein the cover plate is provided with a plurality of positioning holes, the shell is provided with a plurality of positioning blocks assembled and connected with the positioning holes, and the positioning blocks are in clearance fit with the positioning holes and have a clearance amount of 0.05-0.1 mm.
10. The battery with explosion-proof pressure relief valve according to claim 1, wherein said second hollow cylinder second inner diameter tapers in a vertically downward direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320974417.2U CN219696510U (en) | 2023-04-26 | 2023-04-26 | Battery with explosion-proof pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320974417.2U CN219696510U (en) | 2023-04-26 | 2023-04-26 | Battery with explosion-proof pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219696510U true CN219696510U (en) | 2023-09-15 |
Family
ID=87966978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320974417.2U Active CN219696510U (en) | 2023-04-26 | 2023-04-26 | Battery with explosion-proof pressure release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219696510U (en) |
-
2023
- 2023-04-26 CN CN202320974417.2U patent/CN219696510U/en active Active
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