CN111740065A - Power battery explosion-proof valve with stable structure and machining process thereof - Google Patents
Power battery explosion-proof valve with stable structure and machining process thereof Download PDFInfo
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- CN111740065A CN111740065A CN202010679726.8A CN202010679726A CN111740065A CN 111740065 A CN111740065 A CN 111740065A CN 202010679726 A CN202010679726 A CN 202010679726A CN 111740065 A CN111740065 A CN 111740065A
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- 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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Abstract
The invention discloses a power battery explosion-proof valve with a stable structure and a processing technology thereof, and the power battery explosion-proof valve comprises an explosion-proof sheet and a top cover plate, wherein the explosion-proof sheet is arranged in the center of the top cover plate, an explosion-proof nick belt is arranged between the explosion-proof sheet and the top cover plate, a first guide layer and a second guide layer are arranged on the explosion-proof sheet, the second guide layer is arranged around the outer side of the first guide layer, the first guide layer protrudes out of the explosion-proof sheet along a preset first direction, and the second guide layer protrudes out of the explosion-proof sheet along the preset first direction. Set up bellied first guide layer and second guide layer on explosion-proof piece, when rising predetermined blasting value in the power battery, gas pressure can be preferred to act on first guide layer and second guide layer, and first guide layer and second guide layer produce the pulling force of an edge first direction to explosion-proof piece to guide explosion-proof piece to break along explosion-proof nick, guaranteed the normal work of explosion-proof piece, avoid explosion-proof piece to exceed the condition that the blasting value does not break.
Description
Technical Field
The invention relates to the field of new energy, in particular to a power battery explosion-proof valve with a stable structure and a processing technology thereof.
Background
The power battery is a battery for providing a power source for equipment such as a pure electric vehicle, an electric plug hybrid electric vehicle and an electric bicycle. At present, most power batteries adopt lithium batteries packaged by aluminum shells. The explosion-proof valve is a thin-wall valve body on the battery sealing plate, and when the internal pressure of the battery exceeds a specified value, the valve body of the explosion-proof valve is broken, so that the battery is prevented from bursting.
In the prior art publication No. CN107331821A, an explosion-proof notch is provided between the explosion-proof valve and the battery cover to ensure that the explosion-proof valve is broken when exceeding a preset value, and a reinforcing rib is provided to improve the force-absorbing buffer performance. The defect is that when the preset explosion pressure value is reached in the power battery, due to the ductility of metal, the explosion nick of the explosion-proof valve is easy to be led out and exceeds the explosion pressure value without explosion, so that dangerous conditions are caused.
In view of the above, it is desirable to provide an explosion-proof valve for a power battery, which can perform guided explosion on an explosion-proof notch of the explosion-proof valve to ensure safety, and the problem to be solved by those skilled in the art is an urgent need.
Disclosure of Invention
The invention aims to provide a power battery explosion-proof valve with a stable structure, which solves the technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power battery explosion-proof valve with a stable structure comprises an explosion-proof sheet and a top cover plate, wherein the explosion-proof sheet is arranged in a cavity in the center of the top cover plate, and an explosion-proof nick belt is arranged between the explosion-proof sheet and the top cover plate; the explosion-proof piece is characterized in that a first guide layer and a second guide layer are arranged on the explosion-proof piece, the second guide layer is arranged on the outer side of the first guide layer in a surrounding mode, the first guide layer protrudes out of the explosion-proof piece in the preset first direction, and the second guide layer protrudes out of the explosion-proof piece in the preset first direction.
Optionally, the first guide layer and the second guide layer are both flat plate layers, and the thicknesses of the first guide layer and the second guide layer are equal.
Optionally, the top cover plate and the explosion-proof sheet are formed in an integrated punching mode.
Optionally, explosion-proof nick area includes first explosion-proof nick and the explosion-proof nick of second, the explosion-proof nick of second encloses to be located the outward flange of first explosion-proof nick, just first explosion-proof nick with the distance is predetermine at the explosion-proof nick interval of second.
Optionally, the first explosion-proof notch and the second explosion-proof notch are both annular notches, and a safety position is reserved in the explosion-proof notch band.
Optionally, both ends of the first explosion-proof notch and the second explosion-proof notch are provided with arc-shaped barb portions.
A processing technology of a power battery explosion-proof valve with a stable structure, which is applied to processing the power battery explosion-proof valve with the stable structure as claimed in any one of the claims, and is characterized by comprising the following steps:
the first step, punching an aluminum raw material to form an explosion-proof sheet initial blank;
secondly, performing hydrocarbon cleaning on the explosion-proof sheet primary blank at the cleaning temperature of 10-40 ℃ to form an oil stain-removed explosion-proof sheet primary blank;
and thirdly, annealing the degreased explosion-proof sheet primary blank in a high-temperature oven at 350-450 ℃ for 30min to form a finished product of the explosion-proof valve with stress removed.
Optionally, the first step further includes: and carrying out blasting test on the primary explosion-proof sheet blank, wherein the blasting pressure value is 0.4-1.45 Mpa so as to reject the primary explosion-proof sheet blank with the blasting pressure value not up to the standard.
Compared with the prior art, the invention has the following beneficial effects: set up bellied first guide layer and second guide layer on explosion-proof piece, when rising predetermined blasting value in the power battery, gas pressure can be preferred to act on first guide layer and second guide layer, and first guide layer and second guide layer produce the pulling force of an edge first direction to explosion-proof piece to guide explosion-proof piece to break along explosion-proof nick, guaranteed the normal work of explosion-proof piece, avoid explosion-proof piece to exceed the condition that the blasting value does not break.
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, and 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 these drawings without inventive exercise.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
FIG. 1 is a schematic structural diagram of a power battery explosion-proof valve with a stable structure;
FIG. 2 is a schematic sectional view of an explosion-proof valve A-A of a power battery with a stable structure;
FIG. 3 is a schematic sectional view of the explosion-proof valve B-B of the power battery with a stable structure;
FIG. 4 is a schematic diagram of a top view of a power battery explosion-proof valve with a stable structure;
fig. 5 is a schematic view of the explosion-proof valve of the power battery with a stable structure.
Illustration of the drawings: the anti-explosion cover sheet comprises an anti-explosion sheet 1, a top cover sheet 2, an anti-explosion score belt 11, a first guide layer 12, a second guide layer 13, a first anti-explosion score 111, a second anti-explosion score 112, a safety position 113 and a barb part 114.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The embodiment of the invention provides a power battery explosion-proof valve with a stable structure, which comprises an explosion-proof sheet 1 and a top cover sheet 2, wherein the explosion-proof sheet is arranged in a cavity in the center of the top cover sheet 2, and the top cover sheet 2 and the explosion-proof sheet 1 are integrally formed in a punching mode.
Be provided with explosion-proof nick area 11 between explosion-proof piece 1 and the top cover piece 2, be provided with first guide layer 12 and second guide layer 13 on the explosion-proof piece 1, second guide layer 13 encloses the outside of locating first guide layer 12, first guide layer 12 is along predetermineeing first direction protrusion in explosion-proof piece 1, second guide layer 13 is along predetermineeing first direction protrusion in explosion-proof piece 1, wherein, preset the difference in height between first guide layer 12 and the second guide layer 13, and first guide layer 12 and second guide layer 13 are dull and stereotyped layer, first guide layer with the thickness of second guide layer equals.
Set up bellied first guide layer 12 and second guide layer 13 on explosion-proof piece 1, when rising to predetermined blasting value in the power battery, gas pressure can be preferred to act on first guide layer 12 and second guide layer 13, first guide layer 12 and second guide layer 13 produce a pulling force along first direction to explosion-proof piece 1 to guide explosion-proof piece 1 to rupture along explosion-proof nick, the normal work of explosion-proof piece 1 has been guaranteed, avoid explosion-proof piece 1 to exceed the condition that the blasting value does not rupture.
The explosion-proof score belt 11 comprises a first explosion-proof score 111 and a second explosion-proof score 112, the second explosion-proof score 112 surrounds the outer edge of the first explosion-proof score 111, and the first explosion-proof score 111 and the second explosion-proof score 112 are spaced by a preset distance. When any one of the first explosion-proof nick 111 and the second explosion-proof nick 112 is invalid, the other one can also run to play the role of safety explosion prevention, two explosion-proof nicks are arranged to play the role of double insurance, when the pressure value in the battery rises to the preset first pressure value, the explosion-proof nick belt 11 can explode and timely lose efficacy, and when the pressure value in the battery rises to the preset second pressure value which is greater than the preset first pressure value, the explosion-proof nick belt 11 still can explode to realize double explosion pressure insurance.
First explosion-proof nick 111 and second explosion-proof nick 112 are the annular nick, and explosion-proof nick reservation has safe position 113, wherein, safe position 113 means reserve partly do not set up explosion-proof nick on the ring line that explosion-proof nick area 11 locates, when power battery explodes at certain pressure value, explosion-proof piece 1 breaks and 2 perks relatively the overhead gage along explosion-proof nick, explosion-proof piece 1 keeps being connected with overhead gage 2 at safe position 113 junction all the time, explosion-proof piece 1 and overhead gage 2 can not direct separation break away, thereby the security performance when explosion-proof piece 1 explodes has been guaranteed, the both ends department of first explosion-proof nick 111 and second explosion-proof nick 112 all is provided with curved barb portion 114, be convenient for the die sinking.
In the present embodiment, the outer shape of the rupture disk 1 may be any one of square, rectangular, circular, polygonal, and oval, and the rupture notches and the reinforcing ribs correspond to the outer shape of the rupture disk 1.
In the second embodiment, only the first guide layer 12 is arranged on the explosion-proof sheet 1, the first guide layer 12 protrudes out of the explosion-proof sheet 1 along the preset first direction, the gas pressure can preferentially act on the first guide layer 12, and the first guide layer 12 generates a pulling force along the first direction to the explosion-proof sheet 1, so as to guide the explosion-proof sheet 1 to break along the explosion-proof score.
A processing technology of a power battery explosion-proof valve with a stable structure, which is applied to processing the power battery explosion-proof valve with the stable structure in any one of the claims, and is characterized by comprising the following steps:
the first step, punching an aluminum raw material to form an explosion-proof sheet initial blank;
secondly, performing hydrocarbon cleaning on the primary blank of the anti-explosion sheet at the cleaning temperature of 10-40 ℃ to form an anti-explosion sheet primary blank for removing oil stains;
and thirdly, annealing the degreased explosion-proof sheet primary blank in a high-temperature oven at 350-450 ℃ for 30min to form a finished product of the explosion-proof valve with stress removed.
Further, the first step further comprises: and carrying out blasting test on the primary blank of the explosion-proof sheet, wherein the blasting pressure value is 0.4-1.45 Mpa, so as to eliminate the primary blank of the explosion-proof sheet with the blasting pressure value not up to the standard.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A power battery explosion-proof valve with a stable structure comprises an explosion-proof sheet (1) and a top cover plate (2), wherein the explosion-proof sheet (1) is arranged in the center of the top cover plate (2), and an explosion-proof score belt (11) is arranged between the explosion-proof sheet (1) and the top cover plate (2); the explosion-proof piece is characterized in that a first guide layer (12) and a second guide layer (13) are arranged on the explosion-proof piece (1), the second guide layer (13) is arranged on the outer side of the first guide layer (12) in a surrounding mode, the first guide layer (12) protrudes out of the explosion-proof piece (1) along a preset first direction, and the second guide layer (13) protrudes out of the explosion-proof piece (1) along the preset first direction.
2. The power battery explosion-proof valve with the stable structure as recited in claim 1, wherein the first guide layer (12) and the second guide layer (13) are both flat plate layers, and the thicknesses of the first guide layer (12) and the second guide layer (13) are equal.
3. The power battery explosion-proof valve with the stable structure according to claim 1, wherein the top cover plate (2) and the explosion-proof sheet (1) are formed in an integral punch manner.
4. The power battery explosion-proof valve with the stable structure according to claim 1, wherein the explosion-proof score belt (11) comprises a first explosion-proof score (111) and a second explosion-proof score (112), the second explosion-proof score (112) is arranged around the outer edge of the first explosion-proof score (111), and the first explosion-proof score (111) and the second explosion-proof score (112) are spaced apart by a preset distance.
5. The power battery explosion-proof valve with the stable structure according to claim 4, characterized in that the first explosion-proof notch (111) and the second explosion-proof notch (112) are both annular notches, and the explosion-proof notch belt (11) is reserved with a safety position (113).
6. The power battery explosion-proof valve with the stable structure according to claim 4, wherein both ends of the first explosion-proof notch (111) and the second explosion-proof notch (112) are provided with arc-shaped barb parts (114).
7. A processing technology of a power battery explosion-proof valve with a stable structure is applied to processing the power battery explosion-proof valve with the stable structure as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps:
the first step, punching an aluminum raw material to form an explosion-proof sheet initial blank;
secondly, performing hydrocarbon cleaning on the explosion-proof sheet primary blank at the cleaning temperature of 10-40 ℃ to form an oil stain-removed explosion-proof sheet primary blank;
and thirdly, annealing the degreased explosion-proof sheet primary blank in a high-temperature oven at 350-450 ℃ for 30min to form a finished product of the explosion-proof valve with stress removed.
8. The processing technology of the power battery explosion-proof valve with the stable structure as claimed in claim 7, wherein the first step further comprises: and carrying out blasting test on the primary explosion-proof sheet blank, wherein the blasting pressure value is 0.4-1.45 Mpa so as to reject the primary explosion-proof sheet blank with the blasting pressure value not up to the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679726.8A CN111740065A (en) | 2020-07-15 | 2020-07-15 | Power battery explosion-proof valve with stable structure and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679726.8A CN111740065A (en) | 2020-07-15 | 2020-07-15 | Power battery explosion-proof valve with stable structure and machining process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111740065A true CN111740065A (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010679726.8A Pending CN111740065A (en) | 2020-07-15 | 2020-07-15 | Power battery explosion-proof valve with stable structure and machining process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361689A (en) * | 2021-11-23 | 2022-04-15 | 宁波震裕汽车部件有限公司 | Top cover structure of power battery |
| CN115377574A (en) * | 2022-10-25 | 2022-11-22 | 宁波震裕科技股份有限公司 | Integral forming process of top cover plate and explosion-proof valve |
| CN116771964A (en) * | 2023-08-28 | 2023-09-19 | 深圳海辰储能控制技术有限公司 | Explosion-proof valve, end cover assembly, energy storage device and electric equipment |
-
2020
- 2020-07-15 CN CN202010679726.8A patent/CN111740065A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361689A (en) * | 2021-11-23 | 2022-04-15 | 宁波震裕汽车部件有限公司 | Top cover structure of power battery |
| CN115377574A (en) * | 2022-10-25 | 2022-11-22 | 宁波震裕科技股份有限公司 | Integral forming process of top cover plate and explosion-proof valve |
| CN116771964A (en) * | 2023-08-28 | 2023-09-19 | 深圳海辰储能控制技术有限公司 | Explosion-proof valve, end cover assembly, energy storage device and electric equipment |
| CN116771964B (en) * | 2023-08-28 | 2024-01-12 | 深圳海辰储能控制技术有限公司 | Explosion-proof valve, end cover assembly, energy storage device and electric equipment |
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