CN115377574A - Integral forming process of top cover plate and explosion-proof valve - Google Patents
Integral forming process of top cover plate and explosion-proof valve Download PDFInfo
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- CN115377574A CN115377574A CN202211306227.XA CN202211306227A CN115377574A CN 115377574 A CN115377574 A CN 115377574A CN 202211306227 A CN202211306227 A CN 202211306227A CN 115377574 A CN115377574 A CN 115377574A
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- explosion
- proof
- top cover
- sheet
- proof valve
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000009966 trimming Methods 0.000 claims description 24
- 239000007769 metal material Substances 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 3
- 238000004080 punching Methods 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses a top cover plate and explosion-proof valve integrated forming process, which comprises the steps of punching and forming a preformed sheet, forming a concave pit and a convex hull on the preformed sheet, forming an explosion-proof valve plate by using the convex hull, and finally forming the top cover plate with an explosion-proof valve, wherein the formed explosion-proof valve plate and the top cover plate are of an integrated structure, so that the technical problems that the service performance of a battery top cover is influenced and the cost is higher due to the welding of the explosion-proof valve on the top cover plate are solved, the subsequent processing procedures are reduced, the production cost of the top cover is reduced, and the production efficiency of the top cover is improved.
Description
Technical Field
The invention relates to the technical field of manufacturing of battery accessories for new energy automobiles, in particular to a process for integrally forming a top cover plate and an explosion-proof valve.
Background
With the development of the automobile industry, the demand of lithium batteries is also increased, and the demand of lithium batteries is higher and higher. In order to meet the requirement of high power of automobile running, the volume of the lithium battery is designed to be large, and the electrochemical reaction in the battery is increased. When the battery is short-circuited or overcharged or overdischarged, and the like, a battery core of the battery can generate a large amount of gas; in order to ensure the safety of the power battery, an explosion-proof valve is generally arranged on a top cover part of the power battery, so that when a battery core generates a large amount of gas, the explosion-proof valve can be flushed by the large amount of gas to achieve the purpose of pressure relief. The conventional lithium battery is generally provided with the explosion-proof valve plate arranged on the top cover plate of the battery through laser welding, the cost of the mode is high, and the influence of the heating of the opening pressure of the explosion-proof valve plate during laser welding on the service performance of the top cover of the battery is large. For example, the chinese patent publication CN110492024A discloses a method for processing a top cover of a battery, which also welds an explosion-proof valve plate in an explosion-proof hole of a top cover plate, and thus, the same problems exist.
Disclosure of Invention
In order to solve at least one technical defect, the invention provides the following technical scheme:
the top cover plate and explosion-proof valve integrated forming process comprises the following specific steps:
s1, conveying a metal material belt between an upper die and a lower die of a continuous blanking die in a continuous stepping mode to a blanking direction, blanking and forming a plurality of trimming holes arranged in an annular array and a preformed sheet formed along with the plurality of trimming holes in a top cover sheet forming area of the metal material belt in the conveying process, and connecting the preformed sheet with the metal material belt through a connector between the trimming holes;
s2, stamping a preformed sheet on the metal material belt in the continuous conveying process to form a concave pit on the preformed sheet, and correspondingly forming a convex hull on the surface of the preformed sheet through the forming of the concave pit, wherein the convex hull comprises a convex hull wall which is obliquely arranged and a convex hull bottom which is horizontally arranged;
s3, in the continuous conveying process of the metal material belt, simultaneously carrying out shaping and stamping treatment on the concave pits, the convex hull walls and the convex hull bottoms of the convex hulls so as to form explosion-proof holes and explosion-proof blanks positioned in the explosion-proof holes, wherein the explosion-proof blanks comprise explosion-proof sheets and convex parts positioned on the outer surfaces of the explosion-proof sheets;
s4, stamping the preformed sheet in the continuous conveying process of the metal material belt to form a top cover sheet with the thickness smaller than that of the preformed sheet, wherein an annular boss is formed at the edge of an explosion-proof hole of the top cover sheet;
and S5, in the continuous conveying process, the surface of the explosion-proof piece is subjected to stamping treatment, explosion-proof nicks are formed on the surface of the explosion-proof piece, and then the explosion-proof valve plate which is in an integrated structure with the top cover plate is formed.
According to the integral molding process of the top cover plate and the explosion-proof valve, in the step S4, the annular boss is molded while the inner wall of the annular boss is formed with the annular groove.
According to the integral forming process of the top cover plate and the explosion-proof valve, in the step S3, a height difference exists between the outer surface of the explosion-proof plate and the surface of the top cover plate, so that a step part is formed on the surface of the top cover plate.
According to the integral forming process of the top cover plate and the explosion-proof valve, in the step S1, the preformed sheet is formed, and the pole column holes and the liquid injection ports are formed at two ends or the middle part of the preformed sheet.
According to the above-described integral molding process of the top cover plate and the explosion-proof valve, in step S3, the convex portion on the outer surface of the explosion-proof plate is molded while the concave portion is molded on the inner surface of the explosion-proof plate.
According to the integral forming process of the top cover plate and the explosion-proof valve, the explosion-proof hole is a conical hole with the upper end larger than the diameter of the lower end.
According to the integral forming process of the top cover plate and the explosion-proof valve, the explosion-proof hole is a circular explosion-proof hole, and the explosion-proof valve plate is a circular explosion-proof valve plate.
According to the integral forming process of the top cover plate and the explosion-proof valve, the explosion-proof hole is a long explosion-proof hole, and the explosion-proof valve plate is a long explosion-proof valve plate.
According to the integral forming process of the top cover plate and the explosion-proof valve, in the step S1, the trimming holes at the two opposite sides of the preforming sheet are I-shaped trimming holes, and the trimming holes at the two opposite ends of the preforming sheet are T-shaped trimming holes.
According to the integral forming process of the top cover plate and the explosion-proof valve, the explosion-proof nicks are annular explosion-proof nicks or C-shaped explosion-proof nicks.
Compared with the prior art, the manufacturing method of the riveted pole and the battery top cover assembly have the following beneficial effects:
1. through the integrated structure of the formed top cover plate and the explosion-proof valve plate, the technical problems that the service performance of the battery top cover is influenced and the cost is high due to the fact that the explosion-proof valve is welded on the top cover plate are solved, and therefore follow-up machining procedures are reduced, the production cost of the top cover is reduced, and the production efficiency of the top cover is improved.
2. The convex part formed on the outer surface of the explosion-proof sheet increases the strength of the explosion-proof valve sheet, so that the explosion is more stable.
Drawings
FIG. 1 is a schematic layout of a top cover plate and its explosion-proof valve integrally formed;
FIG. 2 is a schematic cross-sectional view of the formation of dimples and protrusions on a preformed sheet;
FIG. 3 is a schematic cross-sectional structure of the formed explosion-proof blank;
FIG. 4 is a schematic cross-sectional structural view of an explosion-proof blank body with an annular boss;
FIG. 5 is a schematic cross-sectional view of a top cover sheet formed with an explosion-proof score;
FIG. 6 is a schematic view of a top cover sheet construction;
fig. 7 is a schematic cross-sectional structure of the top cover sheet.
In the figure: the anti-explosion and anti-explosion device comprises a first forming station 1, a preformed sheet 10, a pole hole 11, a liquid injection port 12, a pit 13, an anti-explosion hole 131, a concave part 132, a convex hull 14, an anti-explosion green body 15, an anti-explosion sheet 151, a step part 152, a convex part 153, an anti-explosion notch 154, an annular boss 16, an annular groove 161, an anti-explosion valve sheet 17, a trimming hole 18, a connecting body 19 and a top cover sheet 20; a second forming station 2; a third forming station 3; a fourth molding station 4; and a fifth forming station 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The embodiment is as follows:
as shown in fig. 1-7, the integrated forming process of the top cover plate and the explosion-proof valve described in this embodiment adopts a continuous blanking die, the continuous blanking die includes a first forming station 1 for forming the pre-formed sheet 10, the post hole 11 and the injection hole 12, a second forming station 2 for forming the concave pit 13 and the convex hull 14, a third forming station 3 for forming the explosion-proof blank 15, a fourth forming station 4 for forming the annular boss 16 and the annular groove 161, and a fifth forming station 5 for forming the explosion-proof nick 154, the top cover plate 20 is continuously formed through the above five forming stations, and the top cover plate 20 and the explosion-proof valve sheet 17 are of an integrated structure, and the specific forming steps are as follows:
s1, conveying a metal material belt 100 between an upper die and a lower die of a continuous blanking die in a continuous stepping mode towards a blanking direction, blanking and forming a plurality of trimming holes 18 arranged in an annular array, a preformed sheet 10 formed along with the plurality of trimming holes 18, pole holes 11 and liquid injection ports 12 on the preformed sheet 10 in a blanking and forming mode on a top cover plate forming area of the metal material belt 100 in the conveying process, wherein the preformed sheet 10 is connected with the metal material belt 100 through connectors 19 between the trimming holes 18, and the trimming holes 18 are not communicated with each other to form the connectors 19 between every two adjacent trimming holes 18; the trimming holes 18 located at the two opposite sides of the preformed sheet 10 are i-shaped trimming holes 18, the trimming holes 18 located at the two opposite ends of the preformed sheet 10 are T-shaped trimming holes 18, the pole holes 11 are formed at the two ends or the middle of the preformed sheet 10, and the metal material belt 100 is an aluminum material belt.
S2, in the continuous conveying process of the metal material belt 100, stamping the preformed sheet 10 on the metal material belt 100 to form the concave pits 13 on the preformed sheet 10, and correspondingly forming the convex hulls 14 on the surface of the preformed sheet 10 through the forming of the concave pits 13, wherein the convex hulls 14 are formed after stamping and stretching, the convex hulls 14 comprise convex hull walls which are obliquely arranged and convex hull bottoms which are horizontally arranged, the convex hull walls are of an annular structure, and the forming of the convex hulls 14 is prepared for forming the explosion-proof blank 15.
S3, in the continuous conveying process of the metal material belt 100, the concave pit 13, the convex hull wall and the convex hull bottom of the convex hull 14 are subjected to shaping and stamping simultaneously, during stamping, the convex hull wall is bent inwards, and the convex hull bottom moves upwards, so that the explosion-proof hole 131 and the explosion-proof blank body 15 located in the explosion-proof hole 131 are formed, the explosion-proof blank body 15 comprises an explosion-proof sheet 151 and a convex portion 153 located on the outer surface of the explosion-proof sheet 151, wherein the explosion-proof sheet 151 is in a horizontal state, the thickness of the explosion-proof sheet 151 is smaller than that of the convex hull wall, therefore, after the explosion-proof sheet 151 is thinned, the explosion is facilitated, a concave portion 132 is further formed on the inner surface of the explosion-proof sheet 151, and the concave portion 132 corresponds to the position of the convex portion 153.
In some preferred embodiments, in step S3, there is a height difference between the outer surface of the explosion-proof sheet 151 and the surface of the top cover sheet 20, so that the surface of the top cover sheet 20 forms a step portion 152, wherein the step portion 152 is formed by stamping the convex-clad wall, thereby enhancing the connection strength between the explosion-proof sheet 151 and the top cover sheet 20.
S4, in the continuous conveying process of the metal material belt 100, stamping is conducted on the preformed sheet 10 to form a top cover piece 20 with the thickness smaller than that of the preformed sheet 10, an annular boss 16 and a ring groove 161 located on the inner wall of the annular boss are formed at the edge of an explosion-proof hole 131 of the top cover piece 20, the top cover piece 20 is made to be thinner after being formed in the step S4, and the ring groove 161 is used for attaching and positioning an explosion-proof film.
S5, in the continuous conveying process of the metal material belt 100, the surface of the explosion-proof piece 151 is subjected to stamping processing, explosion-proof nicks 154 are formed on the surface of the explosion-proof piece 151, then the explosion-proof valve plate 17 which is in an integral structure with the top cover piece 20 is formed, the top cover piece 20 with the explosion-proof valve is subjected to blanking, the top cover piece 20 is separated from a connecting body after blanking, the thickness of the top cover piece 20 is up to 2mm after stamping, and the thickness of the explosion-proof piece 151 is up to 0.5-1mm.
In this embodiment, the explosion-proof hole 131 is a tapered hole with an upper end larger than a lower end diameter, which enables the explosion-proof valve sheet 17 to be exploded through the explosion-proof notch 154, so as to have a larger space for explosion, thereby improving the explosion-proof performance.
In this embodiment, the explosion-proof hole 131 is a circular explosion-proof hole, the explosion-proof valve sheet 17 is a circular explosion-proof valve sheet, or the explosion-proof hole 131 is a long explosion-proof hole, the long explosion-proof hole is a long waist-shaped hole, the explosion-proof valve sheet 17 is a long explosion-proof valve sheet, and the long explosion-proof valve sheet is a long waist-shaped sheet body matched with the long waist-shaped hole; wherein, the shape of explosion-proof hole 131 and explosion-proof valve block 17 can be selected according to actual conditions, and explosion-proof valve hole and explosion-proof valve block still can be for the rectangle structure moreover.
In this embodiment, the explosion-proof notch 154 is an annular explosion-proof notch or a C-shaped explosion-proof notch, and the arrangement of the C-shaped explosion-proof notch can prevent the explosion-proof valve plate 17 from flying to damage other components after the explosion-proof valve plate 17 is exploded.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The integral forming process of the top cover plate and the explosion-proof valve is characterized by comprising the following specific steps of:
s1, conveying a metal material belt (100) between an upper die and a lower die of a continuous blanking die in a continuous stepping mode towards a blanking direction, blanking and forming a plurality of trimming holes (18) arranged in an annular array and a preformed sheet (10) formed along with the plurality of trimming holes (18) in a top cover sheet forming area of the metal material belt (100) in the conveying process, and connecting the preformed sheet (10) with the metal material belt (100) through a connecting body (19) between the trimming holes (18);
s2, in the continuous conveying process of the metal material belt (100), stamping a preformed sheet (10) on the metal material belt (100) to form a concave pit (13) on the preformed sheet (10), and correspondingly forming a convex hull (14) on the surface of the preformed sheet (10) through the forming of the concave pit (13), wherein the convex hull (14) comprises a convex hull wall which is obliquely arranged and a convex hull bottom which is horizontally arranged;
s3, in the continuous conveying process of the metal material belt (100), simultaneously carrying out shaping and stamping treatment on the concave pits (13) and the convex hull walls and the convex hull bottoms of the convex hulls (14) to form explosion-proof holes (131) and explosion-proof blanks (15) located in the explosion-proof holes (131), wherein the explosion-proof blanks (15) comprise explosion-proof sheets (151) and convex parts (153) located on the outer surfaces of the explosion-proof sheets (151);
s4, stamping the preformed sheet (10) in the continuous conveying process of the metal material belt (100) to form a top cover sheet (20) with the thickness smaller than that of the preformed sheet (10), wherein an annular boss (16) is formed at the edge of an explosion-proof hole (131) of the top cover sheet (20);
s5, in the continuous conveying process of the metal material belt (100), the surface of the explosion-proof sheet (151) is subjected to stamping treatment, and explosion-proof notches (154) are formed in the surface of the explosion-proof sheet (151), so that an explosion-proof valve plate (17) which is in an integrated structure with the top cover piece (20) is formed.
2. The process of integrally molding a top cover sheet with an explosion-proof valve as claimed in claim 1, wherein in step S4, the annular boss (16) is molded while forming the annular groove (161) in the inner wall of the annular boss (16).
3. The process of claim 1, wherein in step S3, a height difference exists between the outer surface of the explosion-proof plate (151) and the surface of the top cover plate (20), so that a step (152) is formed on the surface of the top cover plate (20).
4. The process of integrally molding a top cover sheet with an explosion-proof valve as claimed in claim 3, wherein in step S3, the convex portion (153) on the outer surface of the explosion-proof sheet (151) is molded while the concave portion (132) is molded on the inner surface of the explosion-proof sheet (151).
5. The process for integrally molding a top cover plate and an explosion-proof valve according to any one of claims 1 to 4, wherein in step S1, the preformed sheet (10) is molded while the post holes (11) and the liquid injection ports (12) are molded at both ends or the middle part of the preformed sheet (10).
6. The process for integrally molding the top cover plate and the explosion-proof valve according to claim 1, wherein the explosion-proof hole (131) is a tapered hole with an upper end larger than the diameter of a lower end.
7. The process for integrally forming the top cover plate and the explosion-proof valve according to claim 2, wherein the explosion-proof hole (131) is a circular explosion-proof hole, and the explosion-proof valve plate (17) is a circular explosion-proof valve plate.
8. The process for integrally forming the top cover plate and the explosion-proof valve according to claim 1, wherein the explosion-proof hole (131) is a long explosion-proof hole, and the explosion-proof valve plate (17) is a long explosion-proof valve plate.
9. The process of integrally forming a top cover plate and an explosion-proof valve according to claim 1, wherein in step S1, the trimming holes (18) located at the opposite sides of the preformed sheet (10) are i-shaped trimming holes (18), and the trimming holes (18) located at the opposite ends of the preformed sheet (10) are T-shaped trimming holes (18).
10. A process for integrally forming a top cover plate with an explosion-proof valve as claimed in any one of claims 6 to 9, wherein the explosion-proof notch (154) is an annular explosion-proof notch or a C-shaped explosion-proof notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211306227.XA CN115377574B (en) | 2022-10-25 | 2022-10-25 | Integral forming process of top cover plate and explosion-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211306227.XA CN115377574B (en) | 2022-10-25 | 2022-10-25 | Integral forming process of top cover plate and explosion-proof valve |
Publications (2)
| Publication Number | Publication Date |
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| CN115377574A true CN115377574A (en) | 2022-11-22 |
| CN115377574B CN115377574B (en) | 2023-01-31 |
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| CN202211306227.XA Active CN115377574B (en) | 2022-10-25 | 2022-10-25 | Integral forming process of top cover plate and explosion-proof valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118299733A (en) * | 2024-06-06 | 2024-07-05 | 浙江中泽精密科技股份有限公司 | Top cover with integrated explosion-proof valve, battery shell and processing method thereof |
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| CN113385569A (en) * | 2021-08-17 | 2021-09-14 | 常州嘉容电子有限公司 | Production process of explosion-proof valve |
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2022
- 2022-10-25 CN CN202211306227.XA patent/CN115377574B/en active Active
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| CN216928845U (en) * | 2022-01-20 | 2022-07-08 | 合肥国轩高科动力能源有限公司 | Secondary lithium battery explosion-proof valve structure |
| CN114985594A (en) * | 2022-08-04 | 2022-09-02 | 宁波震裕汽车部件有限公司 | Lithium battery top cover plate and explosion-proof valve mounting hole forming process thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118299733A (en) * | 2024-06-06 | 2024-07-05 | 浙江中泽精密科技股份有限公司 | Top cover with integrated explosion-proof valve, battery shell and processing method thereof |
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