CN216161894U - Explosion-proof valve of power battery top cover and power battery module - Google Patents
Explosion-proof valve of power battery top cover and power battery module Download PDFInfo
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- CN216161894U CN216161894U CN202122286359.8U CN202122286359U CN216161894U CN 216161894 U CN216161894 U CN 216161894U CN 202122286359 U CN202122286359 U CN 202122286359U CN 216161894 U CN216161894 U CN 216161894U
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- power battery
- top cover
- explosion
- valve body
- proof valve
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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 utility model relates to the technical field of battery production, in particular to an explosion-proof valve of a top cover of a power battery and a power battery module. The explosion-proof valve of the power battery top cover mainly comprises a valve body. Specifically, the valve body is embedded on the power battery top cover, and the valve body adopts waterproof ventilative material to make inside and outside atmospheric pressure of power battery reach the equilibrium, the valve body can be at the melting of presetting the temperature and open, so that the inside gas of power battery releases. The valve body is provided with a plurality of thinning grooves, so that the thinning grooves can be broken and opened when the air pressure in the power battery is suddenly increased. The explosion-proof valve of the power battery top cover can timely exhaust and release air and prevent moisture from permeating, has good stability and reliability, and can prolong the service life of the power battery. The power battery module comprises the explosion-proof valve of the power battery top cover, and therefore the safety and the reliability of the power battery module can be improved.
Description
Technical Field
The utility model relates to the technical field of battery production, in particular to an explosion-proof valve of a power battery top cover and a power battery module.
Background
With the development of new energy industry, power batteries have the advantages of high energy, long energy storage time, repeated recycling and the like, so that the power batteries are used by more and more people, and meanwhile, the power batteries are widely applied to electric equipment such as electric automobiles and electric bicycles.
In order to protect the power battery, an explosion-proof valve is usually required to be installed on a top cover of the power battery, but the explosion-proof valve in the prior art is made of an aluminum material and is fixed on the top cover of the power battery in a laser welding or integrated manner. The explosion-proof valves of the prior art have the following disadvantages:
1) the melting point of the aluminum material is higher than 600 ℃, when the power battery fails to work and thermal runaway is caused, and the internal air pressure value of the battery does not reach the opening pressure of the explosion-proof valve, the explosion-proof valve cannot be opened by explosion, certain potential safety hazard exists, and the explosion degree of the battery can be aggravated;
2) when the battery is under some extreme conditions, the inside atmospheric pressure value that can produce gas and lead power battery increases inside the power battery, before the inside atmospheric pressure value of power battery does not reach explosion-proof valve opening pressure, explosion-proof valve can not open and can not the pressure release, and power battery works under high atmospheric pressure environment for a long time like this, can influence the life of battery, also has certain potential safety hazard simultaneously.
Therefore, it is desirable to design an explosion-proof valve for a top cover of a power battery and a power battery to solve the above technical problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The first purpose of the present invention is to provide an explosion-proof valve of a power battery top cover, which has waterproof and air-permeable properties, can adjust the internal air pressure of the battery to be balanced with the external air pressure, can be melted and opened at a preset temperature, can be opened by explosion when the internal air pressure of the power battery increases suddenly, has good stability and reliability, and can prolong the service life of the power battery. In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an explosion-proof valve of a power battery top cover, wherein the power battery top cover is buckled on a power battery, and the explosion-proof valve comprises:
the valve body is embedded on the top cover of the power battery and is made of waterproof and breathable materials so as to balance the internal air pressure and the external air pressure of the power battery;
the valve body can be melted and opened at a preset temperature so as to release gas in the power battery;
the valve body is provided with a plurality of thinning grooves, so that when the air pressure in the power battery is suddenly increased, the thinning grooves can be broken and opened.
As an alternative scheme, a groove is formed in the top cover of the power battery, and the valve body is embedded in the groove.
As an alternative, the groove includes a step portion on which the valve body portion is provided.
As an alternative, the explosion-proof valve of the power battery top cover further comprises a sealing ring, and the sealing ring is arranged between the step part and the valve body.
As an alternative, the explosion-proof valve of the power battery top cover further comprises a pressing block, the pressing block is arranged on the valve body, and the pressing block is fixedly connected with the power battery top cover.
As an alternative scheme, a plurality of first through holes are formed in the pressing block, and a plurality of second through holes are formed in the groove.
As an alternative, a first bulge is arranged on the periphery side of the pressing block, a second bulge is arranged on the periphery side of the groove, and the first bulge can be fixedly attached to the second bulge.
As an alternative, the power battery top cap further comprises a positive pole and a negative pole, and the positive pole and the negative pole are arranged on two sides of the valve body.
As an alternative, the waterproof and breathable material is a fluorinated ethylene propylene material.
Another objective of the present invention is to provide a power battery module, which improves the safety and the service life of the power battery module.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the power battery module comprises the explosion-proof valve of the power battery top cover.
The utility model has the beneficial effects that:
the explosion-proof valve of the power battery top cover has the functions of water resistance and ventilation, can prevent external water vapor from entering the battery, and can also prevent electrolyte in the power battery from seeping out of the valve body; when gas is generated inside the power battery, the gas can penetrate through the valve body, so that the internal and external air pressures of the power battery reach a balanced state, and the power battery is prevented from working in a long-term high-pressure environment; meanwhile, the melting point of the explosion-proof valve of the top cover of the power battery is low, and the explosion-proof valve can be melted and opened at a preset temperature, so that gas in the power battery can be discharged in time, and the risk of fire and explosion of the power battery is avoided; the valve body is provided with a plurality of thinning grooves, when the air pressure in the power battery is suddenly increased, the thinning grooves can be broken and opened to achieve the purpose of timely pressure relief, and therefore the safety performance and the service life of the explosion-proof valve of the top cover of the power battery are improved.
The power battery module provided by the utility model comprises the explosion-proof valve of the power battery top cover, so that the safety and the reliability of the power battery module can be improved.
Drawings
Fig. 1 is an exploded schematic view of an explosion-proof valve of a power battery top cover provided in an embodiment of the utility model;
fig. 2 is a sectional view taken along the line a-a in fig. 1.
Reference numerals:
1. a power battery top cover; 11. a groove; 111. a second through hole; 112. a second projection; 12. a step portion;
2. a valve body; 3. a seal ring; 4. briquetting; 41. a first through hole; 42. a first projecting portion;
5. a positive post; 6. and a negative pole.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The stability and the reliability of the explosion-proof valve of the power battery top cover in the prior art are poor, and when the air pressure inside the power battery top cover is increased or the temperature is increased, the explosion-proof valve of the power battery top cover cannot be opened by blasting in time, so that the potential safety hazard of the power battery is increased, and the service life of the power battery is influenced. Therefore, in order to solve the technical problem existing in the prior art, as shown in fig. 1, the embodiment provides an explosion-proof valve for a top cover of a power battery, wherein the top cover 1 of the power battery is buckled on the power battery, and the explosion-proof valve for the top cover of the power battery mainly comprises a valve body 2. Specifically, valve body 2 inlays to be established on power battery top cap 1, and valve body 2 adopts waterproof ventilative material to make, can adjust the inside atmospheric pressure of power battery and outside and reach balancedly, and valve body 2 can melt and open under the temperature of predetermineeing, and valve body 2 can break when atmospheric pressure increases to a definite value suddenly and open to make the inside gas of power battery release.
Further, the valve body 2 in this embodiment is made of fluorinated ethylene propylene, and the valve body 2 is processed by an integral injection molding method. The polyfluorinated ethylene propylene has excellent waterproof and breathable functions, is formed by copolymerizing tetrafluoroethylene and hexafluoropropylene, and has good waterproof and breathable functions, so that the valve body 2 can prevent external water vapor from permeating into the power battery; meanwhile, when the power battery works, most of gases such as carbon dioxide, carbon monoxide, hydrogen, methane and the like generated in the power battery can be discharged by the valve body 2, so that the air pressure in the power battery is adjusted to gradually reach a balanced state, and the power battery is prevented from being damaged due to the fact that the power battery is in a high-pressure state for a long time.
Furthermore, adopt the valve body 2 of gathering the perfluoroethylene propylene and making in this embodiment, have the characteristics that the melting point is low, gather the melting point of perfluoroethylene propylene and be 370 ℃, when power battery inside temperature reaches preset temperature like this (preset temperature is 370 ℃), valve body 2 can take place the melting and open, and then makes the inside gas of power battery in time discharge, avoids the power battery to take place the risk of explosion on fire to reach the pressure release and protect power battery's purpose. In addition, because the material of fluorinated ethylene propylene can not burn, have good fire resistance, that is to say, when valve body 2 takes place the melting, the phenomenon that ignites can not appear in valve body 2, and then can ensure when power battery inside temperature reaches preset temperature, the phenomenon that the explosion-proof valve of power battery top cap can not take place to catch fire the explosion, promotes the security performance of the explosion-proof valve of power battery top cap, prolongs the life of the explosion-proof valve of power battery top cap. Of course, the user may also select other materials with waterproof and air-permeable properties to manufacture the valve body 2 according to actual requirements, and in this embodiment, the material is not limited to the fluorinated ethylene propylene material, and any material with waterproof and air-permeable properties and a lower melting point is within the protection scope of the present invention.
Optionally, in this embodiment, the valve body 2 is provided with a plurality of thinning grooves, so that when the air pressure inside the power battery suddenly increases, the thinning grooves can be broken and opened. The thinning groove is arranged along the peripheral side of the valve body 2, and a plurality of thinning grooves are arranged at equal intervals in the embodiment, so that when the air pressure inside the power battery suddenly increases and reaches a certain numerical value, the valve body 2 can be preferentially broken and opened at the thinning groove, so that the air pressure inside the power battery can be timely released, the function of exhausting and relieving pressure is realized, and the risk of explosion caused by overlarge air pressure inside the power battery is avoided.
Compared with the prior art, the explosion-proof valve of the power battery top cover has the waterproof and breathable functions, can prevent external water vapor from entering the battery, and can also prevent electrolyte in the power battery from seeping out of the valve body 2; when gas is generated inside the power battery, the gas can penetrate through the valve body 2, so that the internal and external air pressures of the power battery reach a balanced state, and the power battery is prevented from working in a long-term high-pressure environment; meanwhile, the melting point of the explosion-proof valve of the top cover of the power battery is low, and the explosion-proof valve can be melted and opened at a preset temperature, so that gas in the power battery can be discharged in time, and the risk of fire and explosion of the power battery is avoided; the valve body 2 is provided with a plurality of thinning grooves, when the air pressure in the power battery is suddenly increased, the thinning grooves can be broken and opened to achieve the purpose of timely pressure relief, and therefore the safety performance and the service life of the explosion-proof valve of the top cover of the power battery are improved.
As shown in fig. 1, in this embodiment, the power battery top cover 1 is provided with a groove 11, and the valve body 2 is embedded in the groove 11, which is beneficial to fixing the valve body 2, so that the valve body 2 can be firmly fixed on the top cover of the power battery, and further, the stability and reliability of the valve body 2 are improved, and the valve body 2 is prevented from falling off from the power battery top cover 1 in the use process of the power battery.
With reference to fig. 1, the groove 11 includes a step portion 12, the valve body 2 is partially disposed on the step portion 12, and the thinning groove leaks out of the step portion 12, so that when the air pressure inside the power battery suddenly increases suddenly, the pressure generated by the air pressure can push the thinning groove, and the thinning groove is burst open, thereby achieving the purpose of pressure relief. Step portion 12 is favorable to improving the stability of valve body 2, makes valve body 2 inlay comparatively firmly and locates in recess 11, and then improves the stability of the explosion-proof valve of power battery top cap. In this embodiment, the plane where the step portion 12 is located is parallel to the upper surface of the power battery top cover 1, so that when the valve body 2 is placed on the step portion 12, the upper surface of the valve body 2 is also parallel to the upper surface of the power battery top cover 1, and further, the pressure generated inside the power battery can be uniformly applied to the valve body 2, and the accuracy of the explosive opening of the valve body 2 is improved.
As shown in fig. 1, in the present embodiment, the explosion-proof valve of the power battery top cover further includes a sealing ring 3, and the sealing ring 3 is disposed between the step portion 12 and the valve body 2. Specifically, be provided with ring groove on the sealing washer 3, valve body 2 can inlay and establish on ring groove, and ring groove can play certain guard action to valve body 2, and sealing washer 3 can seal valve body 2 and power battery top cap 1's gap simultaneously, makes debris such as external steam difficult for entering into power battery inside, improves power battery's security performance. In this embodiment, the sealing ring 3 may be made of flexible silicone rubber, or the like.
As shown in fig. 1 and fig. 2, in this embodiment, the explosion-proof valve of the power battery top cover further includes a pressing block 4, the pressing block 4 is disposed on the valve body 2, and the pressing block 4 is fixedly connected with the power battery top cover 1. The pressing block 4 is manufactured in a stamping and integral forming mode, and the strength and the stability of the pressing block 4 are improved. Briquetting 4 and power battery top cap 1 are through welded mode fixed connection, and briquetting 4 can play certain guard action to valve body 2, avoids valve body 2 to receive the impact of external force and unexpected blasting to open. Meanwhile, when the pressure inside the power battery is too large and the valve body 2 is exploded and opened, the pressing block 4 can prevent the fragments from splashing when the valve body 2 is exploded, and further certain guarantee effect is achieved on the life safety of a user.
Further, briquetting 4 can make sealing washer 3 take place deformation, that is to say, briquetting 4 can make sealing washer 3 produce certain compression volume when the installation, and then makes sealing washer 3 can laminate with step portion 12 and valve body 2 firmly, improves sealed effect.
As shown in fig. 1, in order to improve the safety of the explosion-proof valve of the top cover of the power battery, in this embodiment, a plurality of first through holes 41 are formed in the pressing block 4, a plurality of second through holes 111 are formed in the groove 11, and the second through holes 111 are arranged in one-to-one correspondence with the first through holes 41. The purpose of setting up first through-hole 41 and second through-hole 111 is to be favorable to the inside gas of power battery to move to valve body 2 through second through-hole 111 on, then gaseous through valve body 2 motion to first through-hole 41 department, and then realize the effect of gaseous emission pressure release. Second through-hole 111 and first through-hole 41 one-to-one set up, are favorable to improving gas emission's efficiency, avoid gas emission untimely risk that leads to power battery damage often.
With continued reference to fig. 1, a first protrusion 42 is provided on the circumferential side of the pressing block 4, a second protrusion 112 is provided on the circumferential side of the groove 11, and the first protrusion 42 can be fit-fixed with the second protrusion 112. After the valve body 2 is melted or opened by blasting, the user needs to replace the valve body 2, so that the user only needs to remove the connection between the first protrusion part 42 and the second protrusion part 112, the pressing block 4 can be taken out of the power battery top cover 1, and the valve body 2 can be replaced, and the structure is simple and the operation is convenient.
Optionally, in the present embodiment, the power battery top cover 1 further includes a positive post 5 and a negative post 6, and the positive post 5 and the negative post 6 are disposed on two sides of the valve body 2. Therefore, the positive pole 5 and the negative pole 6 are separated by a certain distance as far as possible, and the short-circuit fault caused by too close distance between the positive pole 5 and the negative pole 6 in the process of using the power battery is avoided, so that the safety performance of the power battery is improved.
Another objective of this embodiment is to provide a power battery module, which includes the above-mentioned explosion-proof valve of the power battery top cover, and the power battery module is composed of a plurality of power batteries, so that the power battery module includes a plurality of explosion-proof valves of the power battery top cover, thereby improving the safety and stability of the power battery module. When the inside atmospheric pressure of power battery module increases, the explosion-proof valve of power battery top cap can the melting pressure release or the explosion opens the pressure release to can avoid the damage of power battery module, improve the security performance of power battery module, prolong the life of power battery module, practice thrift the cost.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. The utility model provides an explosion-proof valve of power battery top cap, power battery top cap (1) lock is on power battery, its characterized in that includes:
the valve body (2) is embedded on the power battery top cover (1), and the valve body (2) is made of waterproof and breathable materials so that the internal air pressure and the external air pressure of the power battery are balanced;
the valve body (2) can be melted and opened at a preset temperature so as to release gas in the power battery;
the valve body (2) is provided with a plurality of thinning grooves, so that when the air pressure in the power battery is suddenly increased, the thinning grooves can be broken and opened.
2. The explosion-proof valve of the power battery top cover is characterized in that the power battery top cover (1) is provided with a groove (11), and the valve body (2) is embedded in the groove (11).
3. The explosion-proof valve of the power battery top cover is characterized in that the groove (11) comprises a step part (12), and the valve body (2) is partially arranged on the step part (12).
4. The explosion-proof valve of the power battery top cover is characterized in that the explosion-proof valve of the power battery top cover further comprises a sealing ring (3), and the sealing ring (3) is arranged between the step part (12) and the valve body (2).
5. The explosion-proof valve of the power battery top cover is characterized in that the explosion-proof valve of the power battery top cover further comprises a pressing block (4), the pressing block (4) is arranged on the valve body (2), and the pressing block (4) is fixedly connected with the power battery top cover (1).
6. The explosion-proof valve of the top cover of the power battery as claimed in claim 5, wherein the pressing block (4) is provided with a plurality of first through holes (41), and the groove (11) is provided with a plurality of second through holes (111).
7. The explosion-proof valve of the top cover of the power battery as claimed in claim 6, wherein the pressing block (4) is provided with a first bulge (42) on the periphery side, the groove (11) is provided with a second bulge (112) on the periphery side, and the first bulge (42) can be attached and fixed with the second bulge (112).
8. The explosion-proof valve of the power battery top cover is characterized in that the power battery top cover (1) further comprises a positive pole column (5) and a negative pole column (6), and the positive pole column (5) and the negative pole column (6) are arranged on two sides of the valve body (2).
9. The explosion-proof valve of the power battery top cover according to any one of claims 1 to 8, wherein the waterproof and breathable material is a fluorinated ethylene propylene material.
10. A power battery module, characterized in that, includes the explosion-proof valve of power battery top cap of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122286359.8U CN216161894U (en) | 2021-09-22 | 2021-09-22 | Explosion-proof valve of power battery top cover and power battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122286359.8U CN216161894U (en) | 2021-09-22 | 2021-09-22 | Explosion-proof valve of power battery top cover and power battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216161894U true CN216161894U (en) | 2022-04-01 |
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ID=80852985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122286359.8U Active CN216161894U (en) | 2021-09-22 | 2021-09-22 | Explosion-proof valve of power battery top cover and power battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216161894U (en) |
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2021
- 2021-09-22 CN CN202122286359.8U patent/CN216161894U/en active Active
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