CN106058121A - Pressure relief structure of battery top cover - Google Patents
Pressure relief structure of battery top cover Download PDFInfo
- Publication number
- CN106058121A CN106058121A CN201610671495.XA CN201610671495A CN106058121A CN 106058121 A CN106058121 A CN 106058121A CN 201610671495 A CN201610671495 A CN 201610671495A CN 106058121 A CN106058121 A CN 106058121A
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- hole
- movable plate
- valve body
- relief valve
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 21
- 239000011148 porous material Substances 0.000 claims description 15
- 239000011796 hollow space material Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention relates to the battery top cover field, and discloses a pressure relief structure of a battery top cover. The pressure relief structure comprises a cover plate and a pressure relief valve body; the pressure relief valve body is formed on the cover plate; the lower part of the pressure relief valve body is provided with a through hole, and the upper part of the pressure relief valve body is provided with an accommodating cavity; the accommodating cavity is internally provided with a movable plate; a gap exists between the periphery of the movable plate and the side wall of the accommodating cavity; an end cover is formed at the upper end of the pressure relief valve body and is provided with a communicating hole communicating with the gap; a spring is arranged between the movable plate and the end cover. Compared with the prior art, when an internal pressure of a battery is too large, the movable plate is pushed upwards by strong-pressure gas and then moves upwards, at the time, the spring between the movable plate and the end cover is compressed, the through hole is opened, the internal pressure of the battery is leaked through a gap between the movable plate and the through hole, overflows along the side wall gap and then is discharged out of the accommodating cavity through the communicating hole; when the internal pressure intensity of the battery restores normal, the compressed spring is reset to drive the movable plate to be returned and sealedly cover the through hole anew; the pressure relief structure can be automatically reset and reused.
Description
Technical field
The present invention relates to the pressure relief in battery cap field, especially battery cap.
Background technology
Along with electronic product miniaturization day by day, portability, the utilization of battery is more and more extensive, this is because battery structure is simple
Single, easy to carry, discharge and recharge is easy to operation, is not affected by outside climatic and temperature, stable and reliable for performance, so existing
The biggest effect is played for the various aspects in social life.
But battery is using and in transportation, may produce short circuit phenomenon, battery core heavy-current discharge, produces a large amount of
Heat, burn out barrier film, and cause bigger short circuit phenomenon, such battery core will produce high temperature, makes electrolyte decomposition become gas, makes
Becoming internal pressure excessive, when the shell of battery core cannot bear this pressure, battery will explode.
In prior art, battery cap arranges rupture disk, when cell internal pressure is excessive, utilize rupture disk explosion
Pressure release, it is to avoid battery explosion, but owing to must again change after rupture disk once superpressure explosion, this blasting in once-through element
Self-resetting can not be realized, be used for multiple times.
Summary of the invention
It is an object of the invention to provide the pressure relief of battery cap, it is intended to solving prior art borehole blasting element can not
Self-resetting nonexpondable problem.
The present invention is achieved in that the pressure relief of battery cap, including cover plate and pressure relief valve body, described relief valve
Body is formed on described cover plate, and the bottom of described pressure relief valve body is provided with through hole, and the top of described pressure relief valve body is provided with cavity volume, described
It is provided with for closing described through hole upper end and the movable plate moved up and down in cavity volume, the periphery of described movable plate and described cavity volume
Having gap between sidewall, the upper end of described pressure relief valve body is formed with end cap, is communicated with the company in described gap in described end cap
Through hole, is provided with spring between described movable plate and described end cap.
Further, the diameter of described cavity volume is more than the diameter of described through hole, and shape between described cavity volume and described through hole
Become to have upwardly disposed first annular step.
Further, described first annular step is provided with the sealing ring compressed for described movable plate, described through hole upper
End connects the hollow space of described sealing ring.
Further, described first annular step is provided around the cannelure that described through hole is arranged, described sealing ring
Lower end is convexly equipped with annular bar down, and described annular bar is embedded in described cannelure.
Further, described movable plate is up-small and down-big shape, is formed with the second upwardly disposed ring-shaped step, described spring
Lower end be connected on described second ring-shaped step, upper end is connected on described end cap.
Further, movable plate includes base plate and is formed at the jacking block on described base plate, and the diameter of described jacking block is less than
The diameter of described base plate, described second ring-shaped step is formed between described base plate and described jacking block, and the periphery of described base plate
And having gap between the sidewall of described cavity volume, described spring housing is located at the periphery of described jacking block.
Further, described intercommunicating pore is formed at the periphery of described end cap.
Further, the periphery of described end cap is provided with the breach towards sunken inside, and the medial wall of described breach is arc-shaped cloth
Putting, form cambered surface sidewall, the sidewall of described pressure relief valve body is formed with the embedded block being embedded in described breach, described intercommunicating pore shape
Become between described embedded block and breach.
Further, described embedded block is plane towards the cambered surface sidewall of described breach, forms flat sidewall, described company
Through hole is formed between described cambered surface sidewall and flat sidewall.
Further, being provided with installing hole in described cover plate, the bottom of described pressure relief valve body is closed and is plugged in described installing hole
In.
Compared with prior art, on the cover board it is formed with pressure relief valve body, when cell internal pressure is excessive, suppresses and pass through pressure release
The through hole of valve body lower portion, upwards top is sealed on above through hole and movable plate moving up and down, the power that movable plate is upwards pushed up
After move up, now the spring between movable plate and end cap is compressed, and movable plate moves up, and through hole is opened, in battery
The pressure in portion is revealed by the space between movable plate and through hole, and between also having between the periphery of movable plate and the sidewall of cavity volume
Gap, so gas can overflow along sidewall spacers, is then discharged outside cavity volume by the intercommunicating pore in end cap, works as gas overflowing, electricity
Pond internal pressure recovers normal, and the spring reset of compression drives movable plate return and again covers through hole, this pressure relief
Can recycle with self-resetting.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the pressure relief of the battery cap that the present invention provides；
Fig. 2 is the schematic diagram of the pressure relief of the battery cap that the present invention provides；
Fig. 3 is the partial enlarged drawing of part A in Fig. 1；
Fig. 4 is the partial enlarged drawing of part B in Fig. 2.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Below in conjunction with specific embodiment, the realization of the present invention is described in detail.
With reference to shown in Fig. 1～4, provide preferred embodiment for the present invention.
The pressure relief of the battery cap that the present invention provides can be used on battery cap, it is also possible to being used in other needs
Want, in the device of overpressure relief, to be not limited in one of which.
The pressure relief of battery cap, including cover plate 12 and pressure relief valve body 11, pressure relief valve body 11 is formed on cover plate 12,
The bottom of pressure relief valve body 11 is provided with through hole 101, and the top of pressure relief valve body 11 is provided with cavity volume, is provided with for closing through hole in cavity volume
101 upper ends and the movable plate 102 moved up and down, have gap, pressure relief valve body between periphery and the sidewall of cavity volume of movable plate 102
The upper end of 11 is formed with end cap 105, is communicated with the intercommunicating pore 104 in gap, between movable plate 102 and end cap 105 in end cap 105
It is provided with spring 103.
Specifically, cover plate 12 is formed with pressure relief valve body 11, is provided with cavity volume on the top of pressure relief valve body 11, sets in cavity volume
Having movable plate 102 moving up and down, movable plate 102 is closing through hole 101 upper end, when movable plate 102 moves up, movable plate
Gap can be formed between 102 and through hole 101, and, between periphery and the sidewall of cavity volume of movable plate 102, also there is gap,
Gap in cavity volume connects with the intercommunicating pore 104 on pressure relief valve body 11 end cap 105, so, the gas of inside battery can be through logical
Gap between hole 101 and movable plate 102 spills in the gap of movable plate 102 and cavity volume sidewall, finally by end cap 105
Intercommunicating pore 104 discharge outside pressure relief valve body 11；Additionally, be provided with spring 103, movable plate between movable plate 102 and end cap 105
102 springs 103 when moving up are compressed, and are formed with gap, beneficially inside battery gas between movable plate 102 and through hole 101
Discharge.
When cell internal pressure is excessive, suppressing the gas through hole 101 by pressure relief valve body 11 bottom, upwards top is sealed on logical
Movable plate 102 above hole 101, moves up after the power that movable plate 102 is upwards pushed up, and spring 103 is compressed, movable plate
102 move up, and through hole 101 is opened, and the gas of inside battery passes through the space between movable plate 102 and through hole 101 to four
Week reveals, and overflows then along sidewall spacers, discharges outside pressure relief valve body 11 finally by the intercommunicating pore 104 in end cap 105, work as gas
After body overflows, inside battery pressure recovers normal, and the spring 103 compressed resets downwards, drives movable plate 102 to move down back
Position also covers through hole 101 again.
When the force value of inside battery exceedes the pressure of normal work, pressure relief valve body 11 can automatically open up pressure release, pressure release
After completing, when the force value of inside battery is reduced to normal value, pressure relief valve body 11 can be automatically switched off and cover through hole 101, this
The pressure relief of battery cap can ensure that inside battery will not occur explosion accident because pressure is excessive, and can be voluntarily
Reset, recycle.
The diameter of cavity volume is arranged the diameter more than through hole 101, and is formed upwardly disposed between cavity volume and through hole 101
First annular step, the movable plate 102 in cavity volume just can cover through hole 101 completely, be also beneficial to cavity volume sidewall and movement
The gap that supplied gas is overflowed is formed between plate 102.
Being provided with sealing ring 106 on first annular step, movable plate 102 covers through hole 101 and is pressed on sealing ring 106
On, when inside battery normal operation, movable plate 102 is connected on sealing ring 106, seals up through hole 101, thus ensures the external world
Impurity will not enter into inside battery by via through holes 101, the hollow space of the upper end communication seals ring 106 of through hole 101, i.e. sealing ring
106 upper ends being set in through hole 101, sealing ring 106 is arranged on first annular step and is conducive to the fixing of sealing ring 106, keeps away
Exempt from sealing ring 106 to move on through hole 101.
First annular step is provided around the cannelure 108 that through hole 101 is arranged, the projection down of the lower end of sealing ring 106
Having annular bar 107, when sealing ring 106 is set in the upper end of through hole 101, the annular bar 107 on sealing ring 106 is embedded in the first ring
In the cannelure 108 of shape step, thus fix sealing ring 106 further, it is to avoid sealing ring 106 with movable plate 102 to
Upper shifting.When suppressing gas and backing down movable plate 102, sealing ring 106 remains stationary as, and movable plate 102 moves up, and opens through hole
101, abuts so that movable plate 102 and sealing ring 106 depart from, gas is easy between the two in formation space between the two
Space is overflowed.
In the present embodiment, movable plate 102, in up-small and down-big shape, is formed with the second upwardly disposed ring-shaped step, spring 103
Lower end be connected on the second ring-shaped step, upper end is connected on end cap 105, when inside battery normally works, movable plate 102 envelope
Cover through hole 101, spring 103 in the raw, when inside battery pressure is excessive need pressure release time, suppress gas and upwards push up shifting
Dynamic plate 102, movable plate 102 moves up, owing to spring 103 upper end is connected on immovable fixing end cap 105, the second ring
Shape step upwards supports spring 103, and spring 103 is compressed, and movable plate 102 moves, and through hole 101 is opened pressure release.
Movable plate 102 includes base plate and the jacking block being formed on base plate, the diameter of jacking block less than the diameter of base plate, second
Ring-shaped step is formed between base plate and jacking block, has gap between periphery and the sidewall of cavity volume of base plate, straight due to jacking block
Footpath, less than the diameter of base plate, is also formed with gap, and the gap between jacking block is more than base plate between jacking block and the sidewall of cavity volume
Between gap, spring 103 is set in the periphery of jacking block, and the upper end of spring 103 is pressed on end cap 105, the lower end of spring 103
It is pressed on base plate.
End cap 105 is formed at the periphery of end cap 105 for connecting the intercommunicating pore 104 in cavity volume gap, due in cavity volume
Gap is formed between chamber wall and movable plate 102, so, intercommunicating pore 104 is arranged on end cap 105 periphery and is conducive to and cavity volume
Interior gap connection.
Be provided with the breach 111 towards sunken inside in the periphery of end cap 105, the medial wall of breach 111 is that arc-shaped is arranged, is formed
Cambered surface sidewall 113, is formed with embedded block 109 in the top sidewall of pressure relief valve body 11, embedded block 109 is embedded in breach 111, shape
Become the sealing of whole pressure relief, and the intercommunicating pore 104 being used for aerofluxus is formed between embedded block 109 and breach 111.
Specifically, embedded block 109 in plane, forms flat sidewall 112 towards the cambered surface sidewall 113 of breach 111, embeds
When block 109 embeds in breach 111, can be formed with space between flat sidewall 112 and cambered surface sidewall 113, intercommunicating pore 104 is formed at
In space between cambered surface sidewall 113 and flat sidewall 112.
Being provided with installing hole 110 in cover plate 12, the bottom of pressure relief valve body 11 is closed and is plugged in installing hole 110, by whole
Pressure relief valve body 11 is arranged on cover plate 12 thus realizes the pressure release to battery cap.Pressure relief valve body 11 can be to pass through installing hole
110 are installed in cover plate 12, it is also possible to be in the manufacturing with cover plate 12 integrated molding.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. the pressure relief of battery cap, it is characterised in that include that cover plate and pressure relief valve body, described pressure relief valve body are formed at institute
Stating on cover plate, the bottom of described pressure relief valve body is provided with through hole, and the top of described pressure relief valve body is provided with cavity volume, is provided with in described cavity volume
For closing described through hole upper end and the movable plate moved up and down, have between periphery and the sidewall of described cavity volume of described movable plate
There are gap, the upper end of described pressure relief valve body to be formed with end cap, described end cap is communicated with the intercommunicating pore in described gap, described shifting
Move and be provided with spring between plate and described end cap.
2. the pressure relief of battery cap as claimed in claim 1, it is characterised in that the diameter of described cavity volume is logical more than described
Upwardly disposed first annular step it is formed with between the diameter in hole, and described cavity volume and described through hole.
3. the pressure relief of battery cap as claimed in claim 1, it is characterised in that described first annular step is provided with confession
The sealing ring that described movable plate compresses, the upper end of described through hole connects the hollow space of described sealing ring.
4. the pressure relief of battery cap as claimed in claim 1, it is characterised in that be provided with ring in described first annular step
The cannelure arranged around described through hole, the lower end of described sealing ring is convexly equipped with annular bar down, and described annular bar is embedded in described
In cannelure.
5. the pressure relief of battery cap as claimed in claim 1, it is characterised in that described movable plate is up-small and down-big shape,
Being formed with the second upwardly disposed ring-shaped step, the lower end of described spring is connected on described second ring-shaped step, and upper end abuts
On described end cap.
6. the pressure relief of battery cap as claimed in claim 1, it is characterised in that movable plate includes base plate and is formed at
Jacking block on described base plate, the diameter of described jacking block is less than the diameter of described base plate, and described second ring-shaped step is formed at described
Between base plate and described jacking block, and having gap between the sidewall of the periphery of described base plate and described cavity volume, described spring is sheathed
Periphery at described jacking block.
7. the pressure relief of battery cap as claimed in claim 1, it is characterised in that described intercommunicating pore is formed at described end cap
Periphery.
8. the pressure relief of battery cap as claimed in claim 1, it is characterised in that the periphery of described end cap is provided with towards indent
The breach fallen into, the medial wall of described breach is that arc-shaped is arranged, forms cambered surface sidewall, and the sidewall of described pressure relief valve body is formed embedding
Entering the embedded block in described breach, described intercommunicating pore is formed between described embedded block and breach.
9. the pressure relief of battery cap as claimed in claim 1, it is characterised in that described embedded block is towards described breach
Cambered surface sidewall is plane, forms flat sidewall, and described intercommunicating pore is formed between described cambered surface sidewall and flat sidewall.
10. the pressure relief of battery cap as claimed in claim 1, it is characterised in that be provided with installing hole, institute in described cover plate
The bottom closing stating pressure relief valve body is plugged in described installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671495.XA CN106058121B (en) | 2016-08-15 | 2016-08-15 | The pressure relief of battery cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671495.XA CN106058121B (en) | 2016-08-15 | 2016-08-15 | The pressure relief of battery cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106058121A true CN106058121A (en) | 2016-10-26 |
| CN106058121B CN106058121B (en) | 2019-01-29 |
Family
ID=57482040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610671495.XA Active CN106058121B (en) | 2016-08-15 | 2016-08-15 | The pressure relief of battery cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106058121B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732283A (en) * | 2017-11-10 | 2018-02-23 | 赵恒祥 | A kind of battery and its relief valve |
| CN110379977A (en) * | 2019-08-07 | 2019-10-25 | 中山市润烨新能源科技有限公司 | With self-relieving power battery structure part |
| CN110391381A (en) * | 2019-08-07 | 2019-10-29 | 中山市润烨新能源科技有限公司 | Power battery structure part with manual pressure release |
| CN110718670A (en) * | 2019-10-15 | 2020-01-21 | 盐城维实新能源科技有限公司 | Automatic liquid feeding car of battery |
| CN113948814A (en) * | 2021-09-11 | 2022-01-18 | 安徽瑞露科技有限公司 | Battery top cap subassembly |
| CN114566751A (en) * | 2021-12-09 | 2022-05-31 | 西安交通大学 | Pressure relief device for safety valve of lithium battery |
| CN114725610A (en) * | 2022-06-06 | 2022-07-08 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, battery and power consumption device |
-
2016
- 2016-08-15 CN CN201610671495.XA patent/CN106058121B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732283A (en) * | 2017-11-10 | 2018-02-23 | 赵恒祥 | A kind of battery and its relief valve |
| CN110379977A (en) * | 2019-08-07 | 2019-10-25 | 中山市润烨新能源科技有限公司 | With self-relieving power battery structure part |
| CN110391381A (en) * | 2019-08-07 | 2019-10-29 | 中山市润烨新能源科技有限公司 | Power battery structure part with manual pressure release |
| CN110718670A (en) * | 2019-10-15 | 2020-01-21 | 盐城维实新能源科技有限公司 | Automatic liquid feeding car of battery |
| CN113948814A (en) * | 2021-09-11 | 2022-01-18 | 安徽瑞露科技有限公司 | Battery top cap subassembly |
| CN114566751A (en) * | 2021-12-09 | 2022-05-31 | 西安交通大学 | Pressure relief device for safety valve of lithium battery |
| CN114725610A (en) * | 2022-06-06 | 2022-07-08 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, battery and power consumption device |
| CN114725610B (en) * | 2022-06-06 | 2024-04-02 | 江苏时代新能源科技有限公司 | End cover assembly, battery cell, battery and power utilization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106058121B (en) | 2019-01-29 |
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Address after: 213200 Minghu Road, Jintan District, Changzhou City, Jiangsu Province, 399 Patentee after: Changzhou Redford Precision Technology Co., Ltd. Address before: 518000 5 Tung Keng Road, Dong Keng, Gongming Town, Guangming New District, Shenzhen, Guangdong Patentee before: SHENZHEN RED FAIRY PRECISION TECHNOLOGY CO., LTD. |