CN113258205A - Explosion-proof valve suitable for lithium cell - Google Patents
Explosion-proof valve suitable for lithium cell Download PDFInfo
- Publication number
- CN113258205A CN113258205A CN202110631784.8A CN202110631784A CN113258205A CN 113258205 A CN113258205 A CN 113258205A CN 202110631784 A CN202110631784 A CN 202110631784A CN 113258205 A CN113258205 A CN 113258205A
- Authority
- CN
- China
- Prior art keywords
- explosion
- proof valve
- lithium battery
- piston
- spring
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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 relates to an explosion-proof valve suitable for a lithium battery, which comprises a top cover plate, a sealing ring, a support ring, a piston, a spring and a protective cover, wherein the top cover plate is provided with a sealing ring; the geometric center of the top cover plate is provided with an air leakage hole, and the piston is arranged in the air leakage hole; a first step, a second step and a third step are circumferentially arranged on the inner wall of the air leakage hole from bottom to top; the sealing ring is arranged on the first step; the support ring is arranged on the second step, and the sealing ring is abutted against the support ring; the protective cover is arranged on the third step; the spring is disposed between the shield and the piston. The utility model provides an explosion-proof valve carries out the pressure release based on the theory of operation of non-blasting, has better reliability, can used repeatedly, can effectively improve the utilization ratio of lithium cell, can regard as the commodity to produce and use, has effectively reduced explosion-proof valve's cost.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to an explosion-proof valve suitable for a lithium battery.
Background
At present, most lithium ion batteries produce a small amount of gas in the using process. When the gas generated reaches a certain amount, the lithium ion battery has the danger of explosion. Therefore, the current square lithium battery generally loses air by welding a disposable explosion-proof valve on the top cover so as to avoid explosion of the lithium battery. When gas is generated in the lithium battery, the internal pressure of the battery rises and reaches the explosion-proof critical value of the explosion-proof valve, the explosion-proof valve explodes at the moment, and the internal pressure of the lithium battery is released. However, due to the explosion of the explosion-proof valve, the lithium battery loses the sealing performance and can only be scrapped. If the blasting takes place in the inside of lithium cell module, then this lithium cell module needs to carry out whole maintenance, wastes time and energy. Moreover, the explosion-proof valve has higher requirements on the welding process; because the explosion-proof valve is limited to disposable, the electric core can not be used continuously after the explosion-proof valve is exploded, the consumption cost is higher, and the resource utilization rate is lower.
Disclosure of Invention
Based on the technical scheme, the invention provides the explosion-proof valve suitable for the lithium battery, and aims to solve the problems that the explosion-proof valve cannot be recycled and the welding process of the explosion-proof valve is reduced. The lithium battery has better reliability, can be repeatedly used, can effectively improve the utilization rate of the lithium battery, can be produced and used as a universal product, and effectively reduces the cost of the explosion-proof valve and the lithium battery.
In order to achieve the purpose, the invention provides the following technical scheme:
an explosion-proof valve suitable for a lithium battery comprises a top cover plate, a sealing ring, a support ring, a piston, a spring and a protective cover;
the geometric center of the top cover plate is provided with an air leakage hole, and the piston is arranged in the air leakage hole;
a first step, a second step and a third step are circumferentially arranged on the inner wall of the air leakage hole from bottom to top; the sealing ring is arranged on the first step; the support ring is arranged on the second step, and the sealing ring is abutted against the support ring; the protective cover is arranged on the third step; the spring is disposed between the shield and the piston.
Optionally, the protective cover comprises a cover surface and a fixing plate which are integrally arranged, a gap is formed between the cover surface and the fixing plate, and the spring is accommodated in the gap; the fixing plate is fixedly arranged on the third step; a plurality of air outlet holes are formed in the circumferential direction of the cover surface.
Optionally, when the explosion-proof valve is in a non-working state (at this time, the lithium battery is in a normal working state, and the internal pressure of the lithium battery is normal), the spring is in a natural state or has a small pre-pressing force.
Optionally, when the explosion-proof valve is in a non-working state, one end of the piston close to the spring abuts against the support ring. Like this, the piston passes through and support ring, sealing washer interact, can be fine keep apart protection casing and lithium cell for the lithium cell is in encapsulated situation.
Optionally, one end of the spring is disposed on the outer side surface of the piston close to one end of the protective cover, and the other end of the spring is connected with the protective cover.
Optionally, the sealing ring, the support ring and the air release hole are concentrically arranged.
Alternatively, the air leakage hole can be used as a liquid injection hole for injecting liquid. Like this to leak the hole and annotate the liquid as annotating the liquid hole, can cancel and annotate the liquid hole, treat to annotate the liquid and become the back, the explosion-proof valve of reassembling to make the lithium cell realize sealed, solve the problem that the notes liquid hole of current lithium cell is difficult to seal after annotating the liquid.
Optionally, the width of the first step matches the diameter of the sealing ring; the diameter of the support ring is equal to the sum of the widths of the first step and the second step.
Optionally, the piston is respectively adapted to the sealing ring and the support ring.
Optionally, the explosion-proof valve is disposed on a housing of the lithium battery or a cover plate of the lithium battery.
Optionally, the housing is one of a square housing, an aluminum housing, a steel housing, or a cylindrical housing.
When the structure is used, when the pressure in the lithium battery is overlarge due to a plurality of reasons, the pressure in the lithium battery increases, so that outward thrust is generated in the battery, the outward thrust increases along with the increase of the pressure in the battery, the prepressure of the spring can be counteracted, the piston is pushed out to the gap of the protective cover, at the moment, the spring is compressed, the piston is pushed out to enable the air leakage hole to be communicated with the gap of the protective cover, so that the interior of the lithium battery is communicated with the exterior, high-pressure gas in the lithium battery is discharged from the air outlet hole of the protective cover to be released, the pressure in the lithium battery is reduced, the spring gradually recovers to a natural state, the piston is reinserted into the air leakage hole due to the prepressure of the spring, and at the moment, a closed space is formed in the lithium battery again; the operation is repeated in this way, so that the interior of the lithium battery can keep normal operation. The explosion-proof valve is not damaged, and the lithium battery is not damaged. Because the spring can drive the piston and carry out concertina movement in one side of lithium cell for the explosion-proof valve of this application forms one-way piston structure of ventilating, and explosion-proof valve still can continue to use after explosion-proof valve pressure release.
The invention achieves the following beneficial effects: the explosion-proof valve suitable for the lithium battery provided by the invention has a one-way ventilation piston type structure, and can still be continuously used after the pressure of the explosion-proof valve is released. And because the explosion-proof valve has an air leakage structure, the explosion principle of 'welding part explosion' is not needed, so that the welding requirement is reduced, the requirement of a welding process can be better reduced, and the production efficiency is improved. In addition, when the lithium battery is recycled to generate gas, the explosion-proof valve can timely discharge the gas inside, ensure good contact between pole pieces, ensure the sealing performance of the lithium battery and effectively inhibit the rapid deterioration of the lithium battery. The utility model provides an explosion-proof valve carries out the pressure release based on the theory of operation of non-blasting, has better reliability, can used repeatedly, can effectively improve the utilization ratio of lithium cell, can regard as the commodity to produce and use, has effectively reduced explosion-proof valve's cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an explosion-proof valve according to an embodiment of the present invention;
fig. 2 is a schematic longitudinal (i.e., long side direction of the top cover plate) sectional structure view of the explosion-proof valve of fig. 1.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The current square lithium battery generally loses air through welding disposable explosion-proof valve on the top cap to avoid the lithium battery to explode. When gas is generated in the lithium battery, the internal pressure of the battery rises and reaches the explosion-proof critical value of the explosion-proof valve, the explosion-proof valve explodes at the moment, and the internal pressure of the lithium battery is released. However, due to the explosion of the explosion-proof valve, the lithium battery loses the sealing performance and can only be scrapped. If the blasting takes place in the inside of lithium cell module, then this lithium cell module needs to carry out whole maintenance, wastes time and energy. Moreover, the explosion-proof valve has higher requirements on the welding process; because the explosion-proof valve is limited to disposable, the electric core can not be used continuously after the explosion-proof valve is exploded, the consumption cost is higher, and the resource utilization rate is lower. Based on this, the invention provides an explosion-proof valve suitable for a lithium battery to solve the technical problems.
As shown in fig. 1 to 2, an embodiment of the present invention provides an explosion-proof valve for a lithium battery, including a top cover plate 10, a sealing ring 20, a support ring 30, a piston 40, a spring 50, and a protection cover 60;
the geometric center of the top cover plate 10 is provided with an air release hole (not marked in the figure), and the piston 40 is arranged in the air release hole;
a first step 11, a second step 12 and a third step 13 are circumferentially arranged on the inner wall of the air leakage hole from bottom to top; the sealing ring 20 is arranged on the first step 11; the support ring 30 is arranged on the second step 12, and the seal ring 20 is abutted against the support ring 30; the protective cover 60 is arranged on the third step 13; the spring 50 is disposed between the shield 60 and the piston 40.
Optionally, the protective cover 60 includes a cover surface 61 and a fixing plate 62 integrally disposed, a gap (not labeled in the figure) is formed between the cover surface 61 and the fixing plate 62, and the spring 50 is accommodated in the gap; the fixing plate 62 is fixedly arranged on the third step 13; the cover surface 61 is circumferentially provided with a plurality of air outlet holes 611.
Alternatively, when the explosion-proof valve is in a non-operating state (when the lithium battery is in a normal operating state and the pressure inside the lithium battery is normal), the spring 50 is in a natural state or a state of small pre-compression force (i.e. a slightly compressed state).
Optionally, when the explosion-proof valve is in a non-working state, one end of the piston 40 close to the spring 50 abuts against the support ring 30. In this way, the piston 40 can well isolate the protective cover 60 from the lithium battery by interacting with the support ring 30 and the sealing ring 20, so that the lithium battery is in a sealed state.
Optionally, one end of the spring 50 is disposed on the outer side surface of the piston 40 near one end of the shield 60, and the other end is connected to the shield 60.
Optionally, the sealing ring 20, the support ring 30 and the relief hole are concentrically arranged.
Alternatively, the air leakage hole can be used as a liquid injection hole for injecting liquid. Like this to leak the hole and annotate the liquid as annotating the liquid hole, can cancel and annotate the liquid hole, treat to annotate the liquid and become the back, the explosion-proof valve of reassembling to make the lithium cell realize sealed, solve the problem that the notes liquid hole of current lithium cell is difficult to seal after annotating the liquid.
Optionally, the width of the first step 11 matches the diameter of the sealing ring 20; the diameter of the support ring 30 is equal to the sum of the widths of the first step 11 and the second step 12.
Optionally, the piston 40 is adapted to the sealing ring 20 and the supporting ring 30 respectively.
Optionally, the explosion-proof valve is disposed on a housing of the lithium battery or a cover plate of the lithium battery.
Optionally, the housing is one of a square housing, an aluminum housing, a steel housing, or a cylindrical housing.
In the embodiment of the present application, the spring 50 may be a general spring, a tower spring, a disc spring, or other elastic body capable of forming a stable force.
The piston 40 may be made of a single component of various materials such as metal, ceramic, and plastic, or may be made of a composite of two or more materials such as metal, ceramic, and plastic.
This application both can regard as the explosion-proof valve of lithium cell to use, can regard as notes liquid hole to use again.
The number of the air outlet holes on the shield 60 can be one or more according to actual needs, and the air outlet holes can be arranged at any position of the top or the side, and can be in any shape such as a circle, a square, an ellipse and the like. The shape of the protective cover can be any shape such as round, square, ellipse and the like.
The components such as the shield and the support ring may be fixed by caulking or laser welding.
When the structure is used, when the pressure in the lithium battery is overlarge due to a plurality of reasons, the pressure in the lithium battery increases, so that outward thrust is generated in the battery, the outward thrust increases along with the increase of the pressure in the battery, the prepressure of the spring can be counteracted, the piston is pushed out to the gap of the protective cover, at the moment, the spring is compressed, the piston is pushed out to enable the air leakage hole to be communicated with the gap of the protective cover, so that the interior of the lithium battery is communicated with the exterior, high-pressure gas in the lithium battery is discharged from the air outlet hole of the protective cover to be released, the pressure in the lithium battery is reduced, the spring gradually recovers to a natural state, the piston is reinserted into the air leakage hole due to the prepressure of the spring, and at the moment, a closed space is formed in the lithium battery again; the operation is repeated in this way, so that the interior of the lithium battery can keep normal operation. The explosion-proof valve is not damaged, and the lithium battery is not damaged. Because the spring can drive the piston and carry out concertina movement in one side of lithium cell for the explosion-proof valve of this application forms one-way piston structure of ventilating, and explosion-proof valve still can continue to use after explosion-proof valve pressure release.
The explosion-proof valve suitable for the lithium battery provided by the invention has a one-way ventilation piston type structure, and can still be continuously used after the pressure of the explosion-proof valve is released. And because the explosion-proof valve has an air leakage structure, the explosion principle of 'welding part explosion' is not needed, so that the welding requirement is reduced, the requirement of a welding process can be better reduced, and the production efficiency is improved. In addition, when the lithium battery is recycled to generate gas, the explosion-proof valve can timely discharge the gas inside, ensure good contact between pole pieces, ensure the sealing performance of the lithium battery and effectively inhibit the rapid deterioration of the lithium battery. The utility model provides an explosion-proof valve carries out the pressure release based on the theory of operation of non-blasting, has better reliability, can used repeatedly, can effectively improve the utilization ratio of lithium cell, can regard as the commodity to produce and use, has effectively reduced explosion-proof valve's cost.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An explosion-proof valve suitable for a lithium battery is characterized by comprising a top cover plate, a sealing ring, a support ring, a piston, a spring and a protective cover;
the geometric center of the top cover plate is provided with an air leakage hole, and the piston is arranged in the air leakage hole;
a first step, a second step and a third step are circumferentially arranged on the inner wall of the air leakage hole from bottom to top; the sealing ring is arranged on the first step; the support ring is arranged on the second step, and the sealing ring is abutted against the support ring; the protective cover is arranged on the third step; the spring is disposed between the shield and the piston.
2. The explosion proof valve for a lithium battery as claimed in claim 2, wherein the shield case comprises a cover face and a fixing plate integrally provided with each other, a gap is formed between the cover face and the fixing plate, and the spring is received in the gap; the fixing plate is fixedly arranged on the third step; a plurality of air outlet holes are formed in the circumferential direction of the cover surface.
3. Explosion-proof valve for a lithium battery as claimed in claim 2, characterized in that the spring is in a natural state or in a less pre-stressed state when the explosion-proof valve is in an inoperative state.
4. The explosion-proof valve for a lithium battery as recited in claim 2, wherein an end of the piston adjacent to the spring abuts against the support ring when the explosion-proof valve is in a non-operating state.
5. The explosion proof valve for a lithium battery as recited in claim 2, wherein one end of the spring is disposed on an outer side surface of one end of the piston adjacent to the shield, and the other end is connected to the shield.
6. The explosion-proof valve for a lithium battery as recited in claim 1, wherein the sealing ring, the support ring and the air release hole are concentrically arranged.
7. The explosion-proof valve for lithium battery as claimed in claim 1, wherein said air release hole is used as a liquid injection hole for injecting liquid.
8. The explosion proof valve for a lithium battery as claimed in claim 1, wherein the width of the first step matches the diameter of the sealing ring; the diameter of the support ring is equal to the sum of the widths of the first step and the second step.
9. The explosion-proof valve for lithium battery as recited in claim 1, wherein the piston is respectively fitted to the sealing ring and the support ring.
10. The explosion-proof valve for a lithium battery as recited in claim 1, wherein the explosion-proof valve is disposed on a case of the lithium battery or a cover plate of the lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110631784.8A CN113258205A (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve suitable for lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110631784.8A CN113258205A (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve suitable for lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113258205A true CN113258205A (en) | 2021-08-13 |
Family
ID=77186897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110631784.8A Pending CN113258205A (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve suitable for lithium cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113258205A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284606A (en) * | 2021-12-30 | 2022-04-05 | 常州瑞德丰精密技术有限公司 | Battery explosion-proof device and power battery |
| CN115020880A (en) * | 2022-06-23 | 2022-09-06 | 江苏正力新能电池技术有限公司 | Battery top cap and battery |
| CN115498343A (en) * | 2022-09-06 | 2022-12-20 | 无锡市检验检测认证研究院 | A protector, lithium cell and consumer for lithium cell |
-
2021
- 2021-06-07 CN CN202110631784.8A patent/CN113258205A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284606A (en) * | 2021-12-30 | 2022-04-05 | 常州瑞德丰精密技术有限公司 | Battery explosion-proof device and power battery |
| CN114284606B (en) * | 2021-12-30 | 2024-01-02 | 常州瑞德丰精密技术有限公司 | Battery explosion-proof device and power battery |
| CN115020880A (en) * | 2022-06-23 | 2022-09-06 | 江苏正力新能电池技术有限公司 | Battery top cap and battery |
| CN115498343A (en) * | 2022-09-06 | 2022-12-20 | 无锡市检验检测认证研究院 | A protector, lithium cell and consumer for lithium cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113258205A (en) | Explosion-proof valve suitable for lithium cell | |
| CN215933700U (en) | Top cap subassembly and have its lithium cell | |
| KR102191717B1 (en) | Safe and high energy USB rechargeable battery | |
| JP2023511865A (en) | End cover unit, battery cell and exhaust method, battery and power consumption device | |
| CN219267846U (en) | Battery, energy storage device and electric equipment | |
| CN218182409U (en) | But utmost point post subassembly, battery top cap and power battery of pressure release | |
| CN101267023B (en) | Plastic shell lithium ion battery and its making method | |
| CN215119150U (en) | Explosion-proof valve suitable for lithium cell | |
| CN109585748A (en) | A kind of power battery explosion protection structure | |
| CN215834664U (en) | Battery cell explosion-proof valve | |
| CN202816681U (en) | Coiled super capacitor | |
| CN115425346B (en) | End cover assembly, battery cell, battery module and electric equipment | |
| JP2010140794A (en) | Relief valve | |
| CN116387772A (en) | End cover assembly, energy storage device and end cover assembly mounting and positioning method | |
| CN206758598U (en) | A kind of solar electrically propelled vehicle battery | |
| US20120183824A1 (en) | Gas venting structure for energy storage device and energy storage device including the same | |
| CN207282542U (en) | A kind of new type of safe column type lithium cell | |
| CN217361830U (en) | Battery cell, battery and power utilization device | |
| CN219873915U (en) | Leakage-proof explosion-proof zinc-manganese battery | |
| CN220456583U (en) | Explosion-proof valve of lithium battery | |
| CN200990403Y (en) | A secondary lithium ion battery and secondary lithium ion battery pile | |
| CN219759864U (en) | Pressure release valve of battery top cover, battery and electricity utilization device | |
| CN219610661U (en) | Battery and battery pressure release structure | |
| CN221080176U (en) | Top cap subassembly and battery package | |
| CN219067136U (en) | Battery top cover assembly and battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |