CN212848704U - Explosion-proof valve, power battery cover plate and power battery - Google Patents
Explosion-proof valve, power battery cover plate and power battery Download PDFInfo
- Publication number
- CN212848704U CN212848704U CN202021378475.1U CN202021378475U CN212848704U CN 212848704 U CN212848704 U CN 212848704U CN 202021378475 U CN202021378475 U CN 202021378475U CN 212848704 U CN212848704 U CN 212848704U
- Authority
- CN
- China
- Prior art keywords
- arc
- groove
- blasting
- blasting groove
- circular arc
- 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 discloses an explosion-proof valve, power battery apron and power battery. The explosion-proof valve includes: the outer edge of the valve ring is used for being connected with the power battery cover plate, the inner side of the valve ring is provided with a rupture disk, and the edge of the rupture disk is connected with the inner edge of the valve ring; a first arc blasting groove, a second arc blasting groove, a third arc blasting groove and a fourth arc blasting groove are sequentially arranged along the edge circumference of the blasting sheet; the first circular arc blasting groove and the third circular arc blasting groove are respectively positioned at two opposite ends of the blasting sheet, and both the first circular arc blasting groove and the third circular arc blasting groove protrude towards the outer side of the valve ring; the second circular arc blasting groove and the fourth circular arc blasting groove are respectively positioned at two opposite sides of the blasting sheet, and both the second circular arc blasting groove and the fourth circular arc blasting groove are sunken towards the inner side of the valve ring; the radius of the arc where the second arc blasting groove is located is larger than the radius of the arc where the first arc blasting groove and the second arc blasting groove are located. The potential safety hazard caused by the high-speed flying of the rupture disk when the rupture tank is disconnected can be eliminated.
Description
Technical Field
The utility model relates to a power battery technical field, more specifically relates to an explosion-proof valve, power battery apron and power battery.
Background
At present, the lithium ion power battery is widely applied to the fields of computers, mobile phones and the like due to the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, has a wide application prospect in electric vehicles such as electric bicycles, electric automobiles and the like and energy storage facilities along with the maturity of manufacturing technology, and can effectively solve global problems such as environmental pollution, energy crisis and the like due to the wide application of the power battery.
During the use process of the power battery, the air pressure in the battery may rapidly rise due to short circuit or other reasons, even exceed a safety value, and thus potential safety hazards such as explosion may be generated.
In order to reduce or solve the potential safety hazard that brings because of inside atmospheric pressure increase, generally can be equipped with runway type or circular relief valve on the battery apron, and generally have a whole circle blasting groove on the relief valve, when the blasting groove broke, battery internal pressure rose to certain extent, and the rupture disc will undirectional high-speed departure, when carrying out monomer electricity core test, causes the injury to the tester very easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an explosion-proof valve, power battery apron and power battery realize eliminating the potential safety hazard that brings because the high-speed departure of rupture disk when blasting the groove disconnection.
In a first aspect, the utility model provides an explosion-proof valve for power battery apron, include:
the outer edge of the valve ring is used for being connected with the power battery cover plate, a rupture disc is arranged on the inner side of the valve ring, and the edge of the rupture disc is connected with the inner edge of the valve ring;
a first arc blasting groove, a second arc blasting groove, a third arc blasting groove and a fourth arc blasting groove are sequentially arranged along the edge circumference of the blasting sheet;
the first arc blasting groove and the third arc blasting groove are respectively positioned at two opposite ends of the blasting sheet, and the first arc blasting groove and the third arc blasting groove both protrude towards the outer side of the valve ring;
the second arc blasting groove and the fourth arc blasting groove are respectively positioned at two opposite sides of the blasting sheet, and both the second arc blasting groove and the fourth arc blasting groove are sunken towards the inner side of the valve ring;
the radius of the arc where the second arc blasting groove is located is larger than the radius of the arc where the first arc blasting groove and the second arc blasting groove are located;
the radius of the arc where the fourth arc blasting groove is located is larger than the radius of the arc where the first arc blasting groove and the second arc blasting groove are located.
Optionally, a first linear blasting groove is arranged between the first circular arc blasting groove and the second circular arc blasting groove, a second linear blasting groove is arranged between the second circular arc blasting groove and the third circular arc blasting groove, a third linear blasting groove is arranged between the third circular arc blasting groove and the fourth circular arc blasting groove, and a fourth linear blasting groove is arranged between the fourth circular arc blasting groove and the first circular arc blasting groove.
Optionally, the first arc blasting groove, the first linear blasting groove, the second arc blasting groove, the second linear blasting groove, the third arc blasting groove, the third linear blasting groove, the fourth arc blasting groove, and the fourth linear blasting groove are sequentially connected in series.
Optionally, the radius of the arc where the first arc blasting groove is located is equal to the radius of the arc where the third arc blasting groove is located, and the radius of the arc where the second arc blasting groove is located is equal to the radius of the arc where the fourth arc blasting groove is located.
Optionally, the ratio of the radius of the arc where the second arc blasting groove is located to the radius of the arc where the first arc blasting groove is located is between 1 and 10.
Optionally, the first surface of the rupture disk or the second surface of the rupture disk is provided with a reinforcing rib, and the reinforcing rib comprises at least one circular arc-shaped reinforcing rib and/or at least one linear reinforcing rib.
Optionally, the number of the reinforcing ribs is multiple, and at least two of the plurality of reinforcing ribs have an intersection region.
Optionally, both ends of at least one of the reinforcing beads in the plurality of reinforcing beads extend to the edge of the rupture disk.
In a second aspect, the present invention further provides a power battery cover plate, which includes at least one first aspect of the explosion-proof valve.
The third aspect of the present invention also provides a power battery, which includes the power battery cover plate of the second aspect.
The beneficial effects of the utility model reside in that:
the first arc blasting groove, the second arc blasting groove, the third arc blasting groove and the fourth arc blasting groove are sequentially arranged on the edge of the blasting sheet in the circumferential direction, wherein the radius of an arc where the second arc blasting groove is located is larger than the radii of arcs where the first arc blasting groove and the second arc blasting groove are located, the radius of an arc where the fourth arc blasting groove is located is larger than the radii of arcs where the first arc blasting groove and the second arc blasting groove are located, when the internal pressure of the battery rapidly rises to exceed a threshold value, because a plurality of arc blasting grooves with different radii exist in a blasting area, the blasting groove with a larger arc is large in stress area, the blasting groove with a smaller arc is small in stress area, the blasting sheet is easier to burst along the blasting groove with a large arc, the effect of pressure relief can be achieved after the blasting groove with a larger arc is burst, and the phenomenon of splashing can be avoided during blasting, the safety is improved.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a schematic view of an explosion-proof valve according to an embodiment of the invention.
Fig. 2 shows a schematic view of an explosion-proof valve according to another embodiment of the present invention.
Fig. 3 shows a schematic view of an explosion-proof valve according to another embodiment of the present invention.
Description of reference numerals:
1-explosion-proof valve, 11-valve ring, 12-rupture disk, 121-first arc rupture groove, 122-second arc rupture groove, 123-third arc rupture groove, 124-fourth arc rupture groove, 125-first straight line rupture groove, 126-second straight line rupture groove, 127-third straight line rupture groove, 128-fourth straight line rupture groove and 13-reinforcing rib.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows a schematic view of an explosion-proof valve according to an embodiment of the invention.
As shown in fig. 1, according to the utility model discloses an explosion-proof valve 1 for power battery apron, include:
the outer edge of the valve ring 11 is used for being connected with a power battery cover plate, a rupture disc 12 is arranged on the inner side of the valve ring 11, and the edge of the rupture disc 12 is connected with the inner edge of the valve ring 11;
a first arc blasting groove 121, a second arc blasting groove 122, a third arc blasting groove 123 and a fourth arc blasting groove 124 are sequentially arranged along the edge circumference of the blasting sheet 12;
the first arc blasting groove 121 and the third arc blasting groove 123 are respectively positioned at two opposite ends of the blasting sheet 12, and the first arc blasting groove 121 and the third arc blasting groove 123 both protrude towards the outer side of the valve ring 11;
the second circular arc blasting groove 122 and the fourth circular arc blasting groove 124 are respectively positioned at two opposite sides of the blasting sheet 12, and the second circular arc blasting groove 122 and the fourth circular arc blasting groove 124 are both recessed towards the inner side of the valve ring 11;
the radius of the arc where the second arc blasting groove 122 is located is larger than the radius of the arc where the first arc blasting groove 121 and the second arc blasting groove 122 are located;
the radius of the arc where the fourth arc blasting groove 124 is located is larger than the radius of the arc where the first arc blasting groove 121 and the second arc blasting groove 122 are located.
Specifically, by sequentially arranging a first arc blasting groove 121, a second arc blasting groove 122, a third arc blasting groove 123 and a fourth arc blasting groove 124 in the circumferential direction of the edge of the rupture disk 12, wherein the radius of the arc where the second arc blasting groove 122 is located is larger than the radii of the arcs where the first arc blasting groove 121 and the second arc blasting groove 122 are located, the radius of the arc where the fourth arc blasting groove 124 is located is larger than the radii of the arcs where the first arc blasting groove 121 and the second arc blasting groove 122 are located, when the internal pressure of the battery sharply rises above a threshold value, because a plurality of arc blasting grooves with different radii exist in a blasting area, the blasting groove with a larger arc is more likely to be exploded along the blasting groove with a larger arc due to a larger stress area, and the blasting groove with a smaller arc is less likely to be exploded, and the effect of pressure relief can be achieved after the blasting groove is exploded, so that the safety valve is free of splashing, the safety is improved.
In this embodiment, a first linear blasting groove 125 is disposed between the first circular arc blasting groove 121 and the second circular arc blasting groove 122, a second linear blasting groove 126 is disposed between the second circular arc blasting groove 122 and the third circular arc blasting groove 123, a third linear blasting groove 127 is disposed between the third circular arc blasting groove 123 and the fourth circular arc blasting groove 124, and a fourth linear blasting groove 128 is disposed between the fourth circular arc blasting groove 124 and the first circular arc blasting groove 121.
Specifically, the lengths of the first, second, third and fourth linear rupture grooves 125, 126, 127 and 128 may be specifically selected according to the size of the explosion-proof valve 1 required in practice. Preferably, the straight line of each of the four straight blasting grooves is tangent to the arc of the adjacent arc blasting groove at the joint.
In other embodiments, no straight-line blasting groove may be provided, that is, the first arc blasting groove 121, the second arc blasting groove 122, the third arc blasting groove 123 and the fourth arc blasting groove 124 are continuously connected in sequence.
In this embodiment, the first arc blasting groove 121, the first linear blasting groove 125, the second arc blasting groove 122, the second linear blasting groove 126, the third arc blasting groove 123, the third linear blasting groove 127, the fourth arc blasting groove 124, and the fourth linear blasting groove are sequentially connected in series.
Specifically, the first circular arc blasting groove 121, the first linear blasting groove 125, the second circular arc blasting groove 122, the second linear blasting groove 126, the third circular arc blasting groove 123, the third linear blasting groove 127, the fourth circular arc blasting groove 124 and the fourth linear blasting grooves are formed by continuously connected nicks, and the depths of the nicks are the same.
In this embodiment, the radius of the arc where the first arc blasting groove 121 is located is equal to the radius of the arc where the third arc blasting groove 123 is located, and the radius of the arc where the second arc blasting groove 122 is located is equal to the radius of the arc where the fourth arc blasting groove 124 is located.
Specifically, as shown in fig. 1, the first circular arc rupture groove 121 and the third circular arc rupture groove 123 have the same radius and are symmetrically disposed at both ends of the rupture disk 12 and are outwardly convex, and the second circular arc rupture groove 122 and the fourth circular arc rupture groove 124 have the same radius and are symmetrically disposed at both sides of the rupture disk 12 and are inwardly concave. And preferably, the ratio of the radius of the arc where the second arc blasting groove 122 is located to the radius of the arc where the first arc blasting groove 121 is located is between 1 and 10.
In other embodiments, the radii of the first circular arc blasting groove 121 and the third circular arc blasting groove 123 may also be different, and the radii of the second circular arc blasting groove 122 and the fourth circular arc blasting groove 124 are also different, preferably, the radius ratio of the circular arcs where the first circular arc blasting groove 121 and the third circular arc blasting groove 123 are located is within a range of 1 to 10, and the radius ratio of the circular arcs where the second circular arc blasting groove 122 and the fourth circular arc blasting groove 124 are located is within a range of 1 to 10.
Optionally, the first surface of the rupture disk 12 or the second surface of the rupture disk 12 is provided with the reinforcing ribs 13, and the reinforcing ribs 13 include at least one circular arc-shaped reinforcing rib and/or at least one linear reinforcing rib. Preferably, the reinforcing beads 13 are provided in plurality, at least two of the plurality of reinforcing beads 13 have an intersecting region, and both ends of at least one reinforcing bead 13 of the plurality of reinforcing beads 13 extend to the edge of the rupture disk 12.
Specifically, the reinforcing ribs 13 are used for connecting the blasting grooves, and the structural strength of the blasting sheet 12 can be effectively improved through the connection of the blasting grooves, so that the deformation is inhibited, and the blasting pressure is more stable.
Referring to fig. 1, in this embodiment, the reinforcing ribs 13 are disposed on the first surface of the rupture disk 12 or the second surface of the rupture disk 12, and each reinforcing rib 13 includes two circular arc-shaped reinforcing ribs and one linear reinforcing rib, wherein both ends of each circular arc-shaped reinforcing rib extend to adjacent rupture grooves, and the two circular arc-shaped reinforcing ribs are connected by the linear reinforcing rib.
Referring to fig. 2, in another embodiment, the ribs 13 may be a plurality of circular arc shaped ribs, with adjacent ribs meeting at the top of their respective circular arcs.
Referring to fig. 3, in another embodiment, the plurality of ribs 13 are all straight ribs, with adjacent ribs meeting at the blast slot.
The embodiment of the utility model provides a still provide a power battery apron (not shown), the explosion-proof valve 1 of at least one above-mentioned embodiment.
Specifically, power battery apron includes the apron body, is equipped with explosion-proof hole, annotates liquid hole and utmost point post on the apron body, and explosion-proof valve 1 sets up in explosion-proof hole. Adopt above-mentioned explosion-proof valve 1 can effectively improve the explosion-proof security of battery apron.
The embodiment of the utility model provides a still provide a power battery, including the power battery apron of above-mentioned embodiment. The power battery also comprises a shell matched with the power battery cover plate, and the inside of the shell is used for placing the secondary battery.
The power battery cover plate with the explosion-proof valve 1 can effectively improve the explosion-proof safety of the power battery.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. An explosion-proof valve for a power battery cover plate, comprising:
the outer edge of the valve ring is used for being connected with the power battery cover plate, a rupture disc is arranged on the inner side of the valve ring, and the edge of the rupture disc is connected with the inner edge of the valve ring;
a first arc blasting groove, a second arc blasting groove, a third arc blasting groove and a fourth arc blasting groove are sequentially arranged along the edge circumference of the blasting sheet;
the first arc blasting groove and the third arc blasting groove are respectively positioned at two opposite ends of the blasting sheet, and the first arc blasting groove and the third arc blasting groove both protrude towards the outer side of the valve ring;
the second arc blasting groove and the fourth arc blasting groove are respectively positioned at two opposite sides of the blasting sheet, and both the second arc blasting groove and the fourth arc blasting groove are sunken towards the inner side of the valve ring;
the radius of the arc where the second arc blasting groove is located is larger than the radius of the arc where the first arc blasting groove and the second arc blasting groove are located;
the radius of the arc where the fourth arc blasting groove is located is larger than the radius of the arc where the first arc blasting groove and the second arc blasting groove are located.
2. The explosion proof valve as recited in claim 1 wherein a first linear blast groove is provided between the first circular arc blast groove and the second circular arc blast groove, a second linear blast groove is provided between the second circular arc blast groove and the third circular arc blast groove, a third linear blast groove is provided between the third circular arc blast groove and the fourth circular arc blast groove, and a fourth linear blast groove is provided between the fourth circular arc blast groove and the first circular arc blast groove.
3. The vent valve according to claim 2, wherein the first circular arc blasting groove, the first linear blasting groove, the second circular arc blasting groove, the second linear blasting groove, the third circular arc blasting groove, the third linear blasting groove, the fourth circular arc blasting groove and the fourth linear blasting groove are sequentially connected in series.
4. The explosion-proof valve of claim 1 wherein the radius of the arc in which the first circular-arc blast groove is located is equal to the radius of the arc in which the third circular-arc blast groove is located, and the radius of the arc in which the second circular-arc blast groove is located is equal to the radius of the arc in which the fourth circular-arc blast groove is located.
5. The explosion-proof valve of claim 4 wherein the ratio of the radius of the arc in which the second circular arc blasting groove is located to the radius of the arc in which the first circular arc blasting groove is located is between 1 and 10.
6. The explosion vent valve as set forth in claim 1, wherein the first surface of the rupture disk or the second surface of the rupture disk is provided with reinforcing ribs comprising at least one circular arc-shaped reinforcing rib and/or at least one linear reinforcing rib.
7. The explosion proof valve of claim 6 wherein said reinforcing ribs are plural, at least two of said plural reinforcing ribs having an intersection region.
8. The explosion proof valve of claim 7 wherein at least one of said ribs of said plurality of ribs has both ends extending to the edge of said rupture disk.
9. A cover plate for a power battery, characterized by comprising at least one explosion-proof valve according to any one of claims 1 to 8.
10. A power cell comprising the power cell cover plate of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021378475.1U CN212848704U (en) | 2020-07-14 | 2020-07-14 | Explosion-proof valve, power battery cover plate and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021378475.1U CN212848704U (en) | 2020-07-14 | 2020-07-14 | Explosion-proof valve, power battery cover plate and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212848704U true CN212848704U (en) | 2021-03-30 |
Family
ID=75115209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021378475.1U Active CN212848704U (en) | 2020-07-14 | 2020-07-14 | Explosion-proof valve, power battery cover plate and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212848704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114024087A (en) * | 2021-09-26 | 2022-02-08 | 常州瑞德丰精密技术有限公司 | Rupture disk for double-open type blasting |
-
2020
- 2020-07-14 CN CN202021378475.1U patent/CN212848704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114024087A (en) * | 2021-09-26 | 2022-02-08 | 常州瑞德丰精密技术有限公司 | Rupture disk for double-open type blasting |
| CN114024087B (en) * | 2021-09-26 | 2022-10-18 | 常州瑞德丰精密技术有限公司 | Rupture disk for double-open type blasting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3916891A1 (en) | Battery, battery pack, electrical device, and battery manufacturing method | |
| US9065098B2 (en) | Secondary battery | |
| WO2023142648A1 (en) | Explosion-proof valve patch for battery, end cover assembly, battery, and electric device | |
| CN212277340U (en) | Explosion-proof valve, power battery cover plate and power battery | |
| CN212848704U (en) | Explosion-proof valve, power battery cover plate and power battery | |
| EP3907816B1 (en) | Secondary battery | |
| US20230307750A1 (en) | Battery cell, battery, electrical apparatus, and method and device for preparing battery cell | |
| CN102130357B (en) | Secondary cell and forming method thereof | |
| CN115863932A (en) | Utmost point post subassembly, end cover subassembly, battery, energy memory and consumer | |
| KR20210032916A (en) | pouch type battery case and apparatus for manufacturing thereof, pouch type secondary battery | |
| CN202217712U (en) | Seal plate assembly for battery and battery with seal plate assembly | |
| CN202495544U (en) | Power battery | |
| CN216720098U (en) | Battery cover plate, battery monomer, battery and electric equipment | |
| US11757154B2 (en) | Battery apparatus and electronic device | |
| CN216563247U (en) | Battery and electronic device | |
| CN218548708U (en) | End cover assembly, battery monomer, battery and consumer | |
| CN207381473U (en) | Over-charging of battery safety guard and lithium ion battery | |
| WO2023028867A1 (en) | Shell, battery cell, battery, and electrical device | |
| EP4199203A1 (en) | Pressure relief apparatus, battery cell, battery and electrical device | |
| CN212113860U (en) | Battery safety valve | |
| CN216671818U (en) | Shell structure and battery with same | |
| CN220209205U (en) | Explosion-proof pressure release structure, battery and battery module | |
| CN204391187U (en) | Battery insulation board and there is the battery of this insulation board | |
| CN217334245U (en) | End cover assembly, battery monomer, battery and consumer | |
| CN218448321U (en) | Explosion-proof piece and battery cover plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |