CN215834664U - Battery cell explosion-proof valve - Google Patents
Battery cell explosion-proof valve Download PDFInfo
- Publication number
- CN215834664U CN215834664U CN202121262264.6U CN202121262264U CN215834664U CN 215834664 U CN215834664 U CN 215834664U CN 202121262264 U CN202121262264 U CN 202121262264U CN 215834664 U CN215834664 U CN 215834664U
- Authority
- CN
- China
- Prior art keywords
- explosion
- proof valve
- plate
- annular boss
- proof
- 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.)
- Active
Links
Images
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 utility model relates to an electric core explosion-proof valve which is used for the explosion prevention of a shell electric core and comprises a cover plate, a bottom plate, a spring, a sealing ring, a movable plate and a cover cap, wherein the cover plate is arranged on the bottom plate; an explosion-proof hole is formed in the geometric center of the cover plate, and an annular boss is circumferentially arranged on the inner wall of the explosion-proof hole; the first end of the annular boss is arranged on the inner wall of the explosion-proof hole, the second end of the annular boss extends outwards along the inner wall of the explosion-proof hole, and the second end of the annular boss protrudes out of the cover plate; the bottom plate is arranged on the outer side of the second end of the annular boss; one end of the spring is arranged on the inner side surface of the bottom plate, and the other end of the spring is connected with the movable plate; the sealing ring is arranged on the side face, close to the spring, of the movable plate; the cover cap covers the annular boss. This application has better reliability, repeatedly usable, can regard as the commodity to produce and use, can effectively reduce the cost of explosion-proof valve and improve the utilization ratio of electric core.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a battery cell explosion-proof valve.
Background
Hard casing electricity core is equipped with explosion-proof valve device often, when hard casing electricity core thermal runaway, can in time release pressure to electric core through explosion-proof valve device to prevent that electric core from taking place danger such as explosion because of the internal pressure gathering. The common explosion-proof valve is generally a concave sheet and is fixed at a cover plate or a shell of the battery cell in a laser welding mode. Because the explosion-proof valve is a thin metal sheet and the strength of the welding part of the explosion-proof valve and the battery cell is not very high, when the battery cell is out of control due to heat or other safety accidents (such as short circuit), the explosion-proof valve can explode in time, so that the pressure in the battery cell can be released in time, and further the battery cell is ensured not to have serious explosion accidents. However, when the welding strength of the explosion-proof valve is not enough, the welding position is easy to break, so that the leakage of the battery cell occurs; when the welding strength of the explosion-proof valve is too high, the explosion-proof valve is not easy to explode or cannot explode in time to cause the explosion of the battery cell; moreover, because the explosion-proof valve is limited to be used for one time, the battery cell cannot be used continuously after the explosion-proof valve is exploded, the consumption cost is high, and the resource utilization rate is low.
SUMMERY OF THE UTILITY MODEL
Based on the above, the utility model provides a battery cell explosion-proof valve, 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. This application has better reliability, can used repeatedly, can effectively improve the utilization ratio of electric core, can regard as the commodity to produce and use, has effectively reduced the cost of explosion-proof valve.
In order to achieve the purpose, the utility model provides the following technical scheme:
an electric core explosion-proof valve is used for explosion prevention of a shell electric core and comprises a cover plate, a bottom plate, a spring, a sealing ring, a movable plate and a cover cap;
an explosion-proof hole is formed in the geometric center of the cover plate, and an annular boss is circumferentially arranged on the inner wall of the explosion-proof hole; the first end of the annular boss is arranged on the inner wall of the explosion-proof hole, the second end of the annular boss extends outwards along the inner wall of the explosion-proof hole, and the second end of the annular boss protrudes out of the cover plate;
the bottom plate is arranged on the outer side of the second end of the annular boss; one end of the spring is arranged on the inner side surface of the bottom plate, and the other end of the spring is connected with the movable plate; the sealing ring is arranged on the side face, close to the spring, of the movable plate; the cover cap covers the annular boss.
Optionally, the cap comprises an arc surface and a fixed plate which are integrally arranged, a gap is formed between the arc surface and the fixed plate, and the movable plate is accommodated in the gap; the fixing plate is fixed on the annular boss; and a first air outlet hole matched with the movable plate is formed in the geometric center of the fixed plate.
Optionally, a plurality of second air outlet holes are formed in the arc surface; the aperture of the second air outlet is smaller than that of the first air outlet.
Optionally, a plurality of holes are disposed on the bottom plate. When the inside pressure of electric core is too big because a plurality of reasons lead to electric core inside when electric core, gaseous hole punching press fly leaf through the bottom plate, when pressure reached the critical value, the fly leaf was lifted, at this moment, produced the gap between fly leaf and the first venthole to make the inside gaseous of electric core flow from first gas outlet, then discharge fast from the second venthole of block. Meanwhile, due to the fact that gas is discharged, the pressure inside the battery cell is reduced, the movable plate is pulled back by the spring again, and the sealing ring is compressed tightly, so that the battery cell is continuously in a sealing state. Because the spring can drive the fly leaf and carry out concertina movement in one side of electric core for the electric core explosion-proof valve of this application forms one-way ventilation's piston structure, and explosion-proof valve still can continue to use after explosion-proof valve pressure release.
Optionally, the aperture of the hole is larger than the aperture of the second air outlet, and the aperture of the hole is smaller than the aperture of the first air outlet.
Optionally, when the cell explosion-proof valve is in a non-operating state (i.e., the cell is in a normal operating state, and the pressure inside the cell is normal), the spring is in a compressed state.
Optionally, when the battery cell explosion-proof valve is in a non-working state, the movable plate abuts against the side surface, close to the arc surface, of the fixed plate. Like this, the fly leaf passes through the sealing washer can be fine with external and electric core isolation for electric core is in encapsulated situation.
Alternatively, the movable plate is preferably a circular plate, and the diameter of the movable plate is larger than the diameter of the first air outlet.
Optionally, the sealing ring is disposed on an edge of a side of the movable plate close to the spring.
Optionally, the cell explosion-proof valve is disposed on a casing of the casing cell or a cover plate of the casing cell.
Optionally, the housing is one of a square housing, an aluminum housing, a steel housing, or a cylindrical housing.
The utility model achieves the following beneficial effects: the battery cell explosion-proof valve provided by the utility model has a one-way ventilation piston type structure, and can still be continuously used after the explosion-proof valve is decompressed. And because the battery cell explosion-proof valve is provided with the 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 battery core is recycled and gas is generated, the internal gas can be timely discharged through the explosion-proof valve, good contact between the pole pieces is guaranteed, and rapid deterioration of the battery core can be effectively inhibited. 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 electric core, 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 an exploded view of a cell explosion-proof valve according to an embodiment of the present invention;
fig. 2 is a schematic longitudinal (i.e. long side direction of the cover plate) section structure diagram of the cell explosion-proof valve in fig. 1;
fig. 3 is a schematic structural view of the cap 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.
At present, a common explosion-proof valve is generally a concave sheet and is fixed at a cover plate or a shell of a battery cell in a laser welding mode. Because the explosion-proof valve is a thin metal sheet and the strength of the welding part of the explosion-proof valve and the battery cell is not very high, when the battery cell is out of control due to heat or other safety accidents (such as short circuit), the explosion-proof valve can explode in time, so that the pressure in the battery cell can be released in time, and further the battery cell is ensured not to have serious explosion accidents. However, when the welding strength of the explosion-proof valve is not enough, the welding position is easy to break, so that the leakage of the battery cell occurs; when the welding strength of the explosion-proof valve is too high, the explosion-proof valve is not easy to explode or cannot explode in time to cause the explosion of the battery cell; moreover, because the explosion-proof valve is limited to be used for one time, the battery cell cannot be used continuously after the explosion-proof valve is exploded, the consumption cost is high, and the resource utilization rate is low. Based on this, the utility model provides a battery cell explosion-proof valve to solve the technical problems.
As shown in fig. 1 to 3, a cell explosion-proof valve for explosion-proof of a housing cell includes a cover plate 10, a bottom plate 20, a spring 30, a sealing ring 40, a movable plate 50 and a cap 60;
an explosion-proof hole 11 is formed in the geometric center of the cover plate 10, and an annular boss 12 is circumferentially arranged on the inner wall of the explosion-proof hole 11; the first end 121 of the annular boss 12 is arranged on the inner wall of the explosion-proof hole, the second end 122 of the annular boss 12 extends outwards along the inner wall of the explosion-proof hole 11, and the second end 122 is arranged to protrude out of the cover plate 10;
the base plate 20 is disposed outside the second end 122 of the annular boss 12; one end of the spring 30 is disposed on the inner side surface of the bottom plate 20, and the other end is connected to the movable plate 50; the sealing ring 40 is disposed on a side of the movable plate 50 close to the spring 30; the cap 60 covers the annular boss 12.
Optionally, as shown in fig. 3, the cap 60 includes an arc surface 61 and a fixed plate 62 that are integrally disposed, a gap (not labeled in the figure) is formed between the arc surface 61 and the fixed plate 62, and the movable plate 50 is accommodated in the gap; the fixing plate 62 is fixed on the annular boss 12; a first air outlet 621 matched with the movable plate 50 is disposed at the geometric center of the fixed plate 62.
Optionally, a plurality of second air outlet holes 611 are arranged on the circular arc surface 61; the aperture of the second outlet hole 611 is smaller than the aperture of the first outlet hole 621.
Optionally, a plurality of holes 21 are disposed on the bottom plate 20. When the pressure inside the battery cell is too high due to several reasons, the gas presses the movable plate 50 through the hole 21 on the bottom plate 20, and when the pressure reaches a critical value, the movable plate 50 is lifted up, and at this time, a gap is generated between the movable plate 50 and the first air outlet 621, so that the gas inside the battery cell flows out from the first air outlet 621 and is then rapidly discharged from the second air outlet 611 of the cap 60. Meanwhile, as the gas is exhausted, the pressure inside the battery cell is reduced, and the spring 30 pulls the movable plate 50 back again and compresses the sealing ring, so that the battery cell continues to be in a sealing state. Because spring 30 can drive fly leaf 50 and carry out concertina movement in one side of electric core for the electric core explosion-proof valve of this application forms the piston structure of one-way ventilation, and explosion-proof valve can still continue to use after explosion-proof valve pressure release.
Optionally, the aperture of the hole 21 is larger than the aperture of the second air outlet 611, and the aperture of the hole 21 is smaller than the aperture of the first air outlet 621.
Optionally, when the cell explosion-proof valve is in a non-operating state (i.e., the cell is in a normal operating state, and the pressure inside the cell is normal), the spring 30 is in a compressed state.
Optionally, when the battery cell explosion-proof valve is in a non-operating state, the movable plate 50 abuts against a side surface of the fixed plate 62 close to the arc surface 61. In this way, the movable plate 50 can well isolate the outside from the battery cell through the sealing ring 40, so that the battery cell is in a sealed state.
Optionally, the sealing ring 40 is disposed on an edge of the movable plate 50 near a side of the spring 30.
Alternatively, in the present application, the movable plate is preferably a circular plate, and the diameter of the movable plate is larger than the diameter of the first outlet hole.
Optionally, the cell explosion-proof valve is disposed on a casing of the casing cell or a cover plate of the casing cell.
Optionally, the housing is one of a square housing, an aluminum housing, a steel housing, or a cylindrical housing.
The battery cell explosion-proof valve provided by the utility model has a one-way ventilation piston type structure, and can still be continuously used after the explosion-proof valve is decompressed. And because the battery cell explosion-proof valve is provided with the 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 battery core is recycled and gas is generated, the internal gas can be timely discharged through the explosion-proof valve, good contact between the pole pieces is guaranteed, and rapid deterioration of the battery core can be effectively inhibited. 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 electric core, 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 utility model. 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 not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using 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 electric core explosion-proof valve is characterized in that the valve is used for preventing the electric core of a shell from explosion and comprises a cover plate, a bottom plate, a spring, a sealing ring, a movable plate and a cover cap;
an explosion-proof hole is formed in the geometric center of the cover plate, and an annular boss is circumferentially arranged on the inner wall of the explosion-proof hole; the first end of the annular boss is arranged on the inner wall of the explosion-proof hole, the second end of the annular boss extends outwards along the inner wall of the explosion-proof hole, and the second end of the annular boss protrudes out of the cover plate;
the bottom plate is arranged on the outer side of the second end of the annular boss; one end of the spring is arranged on the inner side surface of the bottom plate, and the other end of the spring is connected with the movable plate; the sealing ring is arranged on the side face, close to the spring, of the movable plate; the cover cap covers the annular boss.
2. The battery cell explosion-proof valve according to claim 1, wherein the cap comprises an arc surface and a fixed plate which are integrally arranged, a gap is formed between the arc surface and the fixed plate, and the movable plate is accommodated in the gap; the fixing plate is fixed on the annular boss; and a first air outlet hole matched with the movable plate is formed in the geometric center of the fixed plate.
3. The battery cell explosion-proof valve according to claim 2, wherein a plurality of second air outlet holes are formed in the circular arc surface; the aperture of the second air outlet is smaller than that of the first air outlet.
4. The cell explosion-proof valve according to claim 3, wherein a plurality of holes are provided on the bottom plate.
5. The cell explosion-proof valve of claim 4, wherein the aperture of the hole is larger than the aperture of the second vent hole, and the aperture of the hole is smaller than the aperture of the first vent hole.
6. The cell explosion prevention valve of claim 5, wherein the spring is in a compressed state when the cell explosion prevention valve is in an inoperative state.
7. The battery cell explosion-proof valve according to claim 6, wherein when the battery cell explosion-proof valve is in a non-operating state, the movable plate abuts against a side surface of the fixed plate, which is close to the arc surface.
8. The cell explosion-proof valve of claim 7, wherein the sealing ring is disposed on an edge of a side of the movable plate adjacent to the spring.
9. The cell explosion-proof valve according to claim 1, wherein the cell explosion-proof valve is provided on a housing of the housing cell or on a cover plate of the housing cell.
10. The cell explosion-proof valve of claim 9, wherein the housing is one of a square, aluminum, steel, or cylindrical housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121262264.6U CN215834664U (en) | 2021-06-07 | 2021-06-07 | Battery cell explosion-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121262264.6U CN215834664U (en) | 2021-06-07 | 2021-06-07 | Battery cell explosion-proof valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215834664U true CN215834664U (en) | 2022-02-15 |
Family
ID=80189630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121262264.6U Active CN215834664U (en) | 2021-06-07 | 2021-06-07 | Battery cell explosion-proof valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215834664U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944536A (en) * | 2022-06-16 | 2022-08-26 | 孚能科技(赣州)股份有限公司 | Decompression valve and battery |
-
2021
- 2021-06-07 CN CN202121262264.6U patent/CN215834664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944536A (en) * | 2022-06-16 | 2022-08-26 | 孚能科技(赣州)股份有限公司 | Decompression valve and battery |
| CN114944536B (en) * | 2022-06-16 | 2023-06-20 | 孚能科技(赣州)股份有限公司 | Pressure release valve and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5577455B2 (en) | Explosion-proof device, and power battery and power battery module including the same | |
| JP4259890B2 (en) | Sealed storage battery | |
| WO2021004226A1 (en) | Top cover assembly and secondary battery | |
| WO2021228165A1 (en) | Battery structure having cover cap support | |
| EP3522250B1 (en) | Cap assembly and power battery | |
| CN113258205A (en) | Explosion-proof valve suitable for lithium cell | |
| CN215834664U (en) | Battery cell explosion-proof valve | |
| CN214625295U (en) | Cylindrical lithium ion battery | |
| EP4068443A1 (en) | Sealed battery | |
| JP4243148B2 (en) | Sealed storage battery | |
| CN206742294U (en) | Battery cap and battery | |
| CN101281957A (en) | Closing battery with explosion-proof function | |
| JP2006066269A (en) | Sealed-type storage battery | |
| CN109616676B (en) | Explosion-proof alkaline zinc-manganese dioxide cell | |
| JPH10247483A (en) | Safety structure of sealed battery | |
| WO2015079672A1 (en) | Cylindrical battery | |
| CN211789225U (en) | Battery with explosion-proof structure | |
| CN210576261U (en) | Electrode lug structure of winding electrode battery | |
| CN215119150U (en) | Explosion-proof valve suitable for lithium cell | |
| WO2010131520A1 (en) | Sealed secondary battery | |
| CN219086184U (en) | Solid-state explosion-proof battery | |
| CN218569129U (en) | Bean type battery | |
| CN217788702U (en) | Novel button type lithium battery with safe, reliable and explosion-proof functions | |
| JPH0615260U (en) | Battery safety device | |
| CN219779158U (en) | Pole-free battery core shell structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |