CN105405992B - A kind of production method of battery cover board blast resistance construction - Google Patents
A kind of production method of battery cover board blast resistance construction Download PDFInfo
- Publication number
- CN105405992B CN105405992B CN201510959418.XA CN201510959418A CN105405992B CN 105405992 B CN105405992 B CN 105405992B CN 201510959418 A CN201510959418 A CN 201510959418A CN 105405992 B CN105405992 B CN 105405992B
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- Prior art keywords
- explosion
- valve body
- cover board
- proof valve
- proof
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 29
- 238000004080 punching Methods 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012780 transparent material Substances 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
- H01M50/10—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
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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 discloses a kind of production methods of battery cover board blast resistance construction, specifically include following steps：Step 1, the preparation of parts；Step 2 carries out punching press to battery cover board substrate, forms gas vent；Step 3 installs explosion-proof valve body and checks its air-tightness；Step 4 installs lower protection membrane structure and checks its air-tightness；Step 5 installs explosion-proof membrane structure；Step 6 installs upper protective film structure；Step 7, riveting fasten explosion-proof valve body, make inner components that intimate-association state be kept not generate rebound phenomenon.This method it is simple for process, each step is easily controllable, and the overall tightness of blast resistance construction is good, the phenomenon that being not in leakage, and the explosion-proof performance for the battery anti-explosion structure made is stablized, and the stability of battery is improved, and reduces battery explosion event and occurs.
Description
Technical field
The present invention relates to battery cover board manufacture technology fields, and in particular to a kind of making side of battery cover board blast resistance construction
Method.
Background technology
Present electronic product has spread all over the requirement of industry-by-industry and field and daily household.Lithium ion box hat
The features such as totally-enclosed battery and its high power capacity and part throttle characteristics of battery core, lithium ion battery is used widely.With power skill
The continuous development of art, current power battery have the advantages that small, capacity is big, power is high, when the abnormality of the battery occurs, one
As chemical reaction generated due to the conductive material of inside battery, be easy to generate huge interior pressure in inside battery, at this point, if
Interior pressure can not discharge in time, and after gathering to a certain extent, battery easy tos produce explosion, brings danger.Currently, power lithium battery
The blast resistance construction manufacture craft of pond cover board is centralized positioning step hole first to be got on cover board plate body, then in the stepped hole
Welding or riveting rupture pressure disc finally get explosion-proof trace on rupture pressure disc, and such structure processing is complicated, is susceptible to leakage, causes
Explosion-proof performance is unstable.
Invention content
In order to solve the above-mentioned technical problem the present invention provides a kind of production method of battery cover board blast resistance construction, this system
Solve the technical problems such as existing processing method is complicated, be easy leakage, explosion-proof performance is unstable as method.
A kind of production method of battery cover board blast resistance construction, specifically includes following steps：
Step 1 prepares parts, forms upper press ring, middle pressure ring, lower pressure ring, explosion-proof valve body by vehicle system, passes through lathe
Punching forms upper protective film, upper gasket, rupture pressure disc, lower protective film, lower seal pad；Be integrally formed by high-temperature injection to be formed it is anti-
Quick-fried sealing ring, explosion-proof valve body include two treads and two risers, specially tread one, riser one, tread two, riser two successively
Head and the tail connect；
Step 2 is stamped and formed out gas vent, and gas vent is stamped and formed out on battery cover board substrate；
Explosion-proof valve body is passed through gas vent, is packed into battery cover board substrate, is welded explosion-proof valve body using welding manner by step 3
It is connected on battery cover board substrate；
Step 4 installs lower protection membrane structure, lower seal pad, lower protective film, lower pressure ring is sequentially loaded into explosion-proof valve body, and
Punching press is carried out with stamping equipment, so that lower seal pad is deformed and is sealed, lower pressure ring generates extrusion expansion in punching course
And combine closely with explosion-proof valve interior wall, reach tightening state, the outer diameter of lower pressure ring and the internal diameter of explosion-proof valve body riser one match
It closes, the two forms interference fit；
Step 5 installs explosion-proof membrane structure, and explosion-proof sealing ring, rupture pressure disc and middle pressure ring are sequentially loaded into explosion-proof valve body,
First rupture pressure disc is bonded with middle pressure ring before being fitted into, rupture pressure disc, which is stacked on the explosion-proof sealing ring and is fixed on, described to be prevented
On quick-fried valve body tread two, the riser two of middle pressure ring and explosion-proof valve body is interference fitted；
Upper protective film structure is installed to rupture pressure disc superstructure by step 6, is specially sequentially loaded into gasket, upper guarantor
Cuticula, upper press ring, wherein upper gasket is mounted on middle pressure ring, will be pushed power and be acted on upper press ring, and make gasket and prevent
Quick-fried sealing ring, which is deformed, reaches sealing state, upper press ring generated under the action of lower pressure extrusion expansion and in explosion-proof valve body
Wall is combined closely, and tightening state is reached.
Wherein, including step 7, lower pressure is applied to explosion-proof valve body upper port wall with pneumatic punching machine, forming it into thickness is
The back-off position of 1.5mm makes inner components that intimate-association state be kept not generate rebound phenomenon.
Preferably, use the air pressure of 0.6MPa to explosion-proof valve body and battery cover board substrate between step 3 and step 4
Weld seam face is impacted, and the attack time is no less than 40S, is checked the air-tightness in weld seam face, is reached no gas leakage state.
Preferably, it is protected under the impact of explosion-proof valve body lower end with the air pressure of 0.2 ~ 0.25MPa between step 4 and step 5
Cuticula 40S or more checks the air-tightness of lower protection membrane structure, reaches no gas leakage state.
Wherein, the welding manner is electric resistance welding, Laser Welding or ultrasonic bond.
Preferably, the upper gasket and lower seal pad are all made of polytetrafluoroethylene material.
It is further preferred that the explosion-proof sealing ring is integrally formed using fluorubber material high-temperature injection.
The present invention provides a kind of production method of battery cover board blast resistance construction, simple for process, each step of this method
Easily controllable, the overall tightness of blast resistance construction is good, the phenomenon that being not in leakage, the battery anti-explosion structure made it is anti-
Quick-fried performance is stablized, and the stability of battery is improved, and reduces battery explosion event and occurs.
Description of the drawings
The battery anti-explosion structure cut-away illustration that Fig. 1 present invention makes.
Reference numeral：Cover board body 1；Gas vent 2；Explosion-proof valve body 3；Rupture pressure disc 4；Explosion-proof sealing ring 5；Middle pressure ring 6；Under it is close
Packing 7；Lower protective film 8；Lower pressure ring 9；Upper gasket 10；Upper protective film 11；Upper press ring 12；Tread 1；Riser 1；Tread
2 33；Riser 2 34；Attaching part 35.
Specific implementation mode
In order to allow those skilled in the art to more fully understand technical scheme of the present invention, the present invention is made below further
It illustrates.
As shown in Fig. 1, a kind of battery anti-explosion structure, including cover board body 1 are equipped with gas vent 2 on cover board body,
Be fixed with explosion-proof valve body 3 on gas vent, explosion-proof valve body 3 by laser welding on the gas vent of cover board body, it is explosion-proof
Valve body 3 use stepped construction, explosion-proof valve body 3 include two treads and two risers, specially tread 1, riser 1,
Tread 2 33, riser 2 34, tread 1, riser 1, tread 2 33, riser 2 34 are sequentially connected end to end, in explosion-proof valve body
Two upper end of riser be equipped with attaching part 35, the tread 1, riser 1, tread 2 33 and riser 2 34 are integrated into
Type structure.Explosion-proof valve body 3 plays holder in entire blast resistance construction, and all accessories are located by connecting.Explosion-proof
The tread two of valve body is equipped with rupture pressure disc 4 and explosion-proof sealing ring 5, and rupture pressure disc is stacked on the explosion-proof sealing ring and is fixed on institute
On the explosion-proof valve body tread two stated, matching is equipped with the middle pressure ring 6 for compressing rupture pressure disc, middle pressure ring and explosion-proof valve body on rupture pressure disc
Riser two is interference fitted, and explosion-proof sealing ring 5 is integrally formed by fluorubber material high-temperature injection.The thickness of the rupture pressure disc is
The rupture pressure disc of 0.018-0.022MM, this structure can ensure the fluctuation range very little of explosion-proof pressure, to ensure battery knot
The safety of structure, at a particular pressure ability ignite blast resistance construction.
It is equipped with lower seal pad 7 in the tread one of explosion-proof valve body lower end, i.e., explosion-proof valve body, barrier is equipped in lower seal pad
The lower protective film 8 that battery core is contacted with rupture pressure disc is equipped on lower protective film under so that lower protective film is combined closely with lower seal pad
Pressure ring 9, the setting of lower protective film, can effectively Separated explosion-proof film connect with battery core, can effectively obstruct the excessive of electrolyte,
Rupture pressure disc is avoided to be corroded by electrolyte, the outer diameter of lower pressure ring and the internal diameter of explosion-proof valve body riser one match, and the two is formed
Interference fit, under the action of lower pressure ring, can effectively ensure that lower protective film and lower seal pad are combined closely.
It is equipped with upper gasket 10 on middle pressure ring, the upper protection that isolation rupture pressure disc is contacted with the external world is equipped on upper gasket
Film 11 is equipped with the upper press ring 12 for making upper protective film combine closely with upper gasket on upper protective film.The setting of upper protective film, energy
Lening out for enough effectively isolation rupture pressure discs and external environment, avoids rupture pressure disc from being destroyed by extraneous factor.Lower protective film 8 and upper
Protective film 11 is all made of PP transparent materials, and upper gasket 10 and lower seal pad 7 are all made of polytetrafluoroethylene material.Described is explosion-proof
Sealing ring 5, rupture pressure disc 4, middle pressure ring 6, upper gasket 10, upper protective film 11, the outer diameter of upper press ring 12 are identical, and described is explosion-proof close
Seal 5, middle pressure ring 6, upper gasket 10, the internal diameter of upper press ring 12 are identical, and the riser two of upper press ring and explosion-proof valve body is interference fitted.
A kind of production method of battery cover board blast resistance construction, specifically includes following steps：
Step 1 prepares parts, forms upper press ring, middle pressure ring, lower pressure ring, explosion-proof valve body by vehicle system, passes through lathe
Punching forms upper protective film, upper gasket, rupture pressure disc, lower protective film, lower seal pad；Using fluorubber material high-temperature injection one
It is molded explosion-proof sealing ring, explosion-proof valve body includes two treads and two risers, specially tread one, riser one, tread two, riser
Two are sequentially connected end to end；
Step 2 is stamped and formed out gas vent, and gas vent is stamped and formed out on battery cover board substrate；
Explosion-proof valve body is passed through gas vent, is packed into battery cover board substrate, is welded explosion-proof valve body using welding manner by step 3
It is connected on battery cover board substrate, used welding manner is electric resistance welding, Laser Welding or ultrasonic bond；With the air pressure pair of 0.6MPa
The weld seam face of explosion-proof valve body and battery cover board substrate is impacted, the attack time is no less than 40S, checks the airtight of weld seam face
Property, reach no gas leakage state, i.e. explosion-proof valve body weld seam face is air tight under 0.6MPa air pressures, to weld seam face airtight test number
It no less than 5 times, needs every time without gas leak phenomenon；
Step 4 installs lower protection membrane structure, lower seal pad, lower protective film, lower pressure ring is sequentially loaded into explosion-proof valve body, and
Punching press is carried out with stamping equipment, so that lower seal pad is deformed and is sealed, lower pressure ring generates extrusion expansion in punching course
And combine closely with explosion-proof valve interior wall, reach tightening state, the outer diameter of lower pressure ring and the internal diameter of explosion-proof valve body riser one match
It closes, the two forms interference fit；Lower protective film 40S or more is impacted from explosion-proof valve body lower end with the air pressure of 0.2 ~ 0.25MPa, is checked
The air-tightness of lower protection membrane structure, reaches no gas leakage state, i.e. battery anti-explosion structure under cell internal pressure 0.25MPa effects,
It will not gas leakage explosion；Lower protective film gas punching press number is no less than 3 times, needs to avoid battery leakage existing without gas leak phenomenon every time
As occurring；
Step 5 installs explosion-proof membrane structure, and explosion-proof sealing ring, rupture pressure disc and middle pressure ring are sequentially loaded into explosion-proof valve body,
First rupture pressure disc is bonded with middle pressure ring before being fitted into；
Upper protective film structure is installed to rupture pressure disc superstructure by step 6, is specially sequentially loaded into gasket, upper guarantor
Cuticula, upper press ring, wherein upper gasket is mounted on middle pressure ring, will be pushed power and be acted on upper press ring, and make gasket and prevent
Quick-fried sealing ring, which is deformed, reaches sealing state, upper press ring generated under the action of lower pressure extrusion expansion and in explosion-proof valve body
Wall is combined closely, and tightening state is reached, and rupture pressure disc is stacked on the explosion-proof sealing ring and is fixed on the explosion-proof valve body and steps on
On face two, the riser two of middle pressure ring and explosion-proof valve body is interference fitted；
Step 7 applies lower pressure with pneumatic punching machine to explosion-proof valve body upper port wall, and it is falling for 1.5mm to form it into thickness
Button bit, back-off position press upper press ring, make inner components that intimate-association state be kept not generate rebound phenomenon.
The present invention provides a kind of production method of battery cover board blast resistance construction, simple for process, each step of this method
Easily controllable, the overall tightness of blast resistance construction is good, the phenomenon that being not in leakage, the battery anti-explosion structure made it is anti-
Quick-fried performance is stablized, and the stability of battery is improved, and reduces battery explosion event and occurs.
It is the preferable realization method of the present invention above, it should be noted that without departing substantially from spirit of that invention and its essence
In the case of, those skilled in the art make various corresponding change and deformations in accordance with the present invention, but these change
The protection domain of appended claims of the invention should all be belonged to deformation.
Claims (7)
1. a kind of production method of battery cover board blast resistance construction, which is characterized in that specifically include following steps：
Step 1 prepares parts, forms upper press ring, middle pressure ring, lower pressure ring, explosion-proof valve body by vehicle system, is punched by lathe
Form upper protective film, upper gasket, rupture pressure disc, lower protective film, lower seal pad；Be integrally formed by high-temperature injection to be formed it is explosion-proof close
Seal, explosion-proof valve body include two treads and two risers, specially tread one, riser one, tread two, riser two successively head and the tail
Connection；
Step 2 is stamped and formed out gas vent, and gas vent is stamped and formed out on battery cover board substrate；
Explosion-proof valve body is passed through gas vent, is packed into battery cover board substrate, is welded to explosion-proof valve body using welding manner by step 3
On battery cover board substrate；
Step 4 installs lower protection membrane structure, lower seal pad, lower protective film, lower pressure ring is sequentially loaded into explosion-proof valve body, punching is used in combination
Press equipment carry out punching press, so that lower seal pad is deformed and be sealed, lower pressure ring generated in punching course extrusion expansion and with
Explosion-proof valve interior wall is combined closely, and tightening state is reached, and the outer diameter of lower pressure ring is matched with the internal diameter of explosion-proof valve body riser one, and two
Person forms interference fit；
Step 5 installs explosion-proof membrane structure, and explosion-proof sealing ring, rupture pressure disc and middle pressure ring are sequentially loaded into explosion-proof valve body, are being packed into
Preceding to be first bonded rupture pressure disc with middle pressure ring, rupture pressure disc is stacked on the explosion-proof sealing ring and is fixed on the explosion-proof valve
On body tread two, the riser two of middle pressure ring and explosion-proof valve body is interference fitted；
Upper protective film structure is installed to rupture pressure disc superstructure by step 6, is specially sequentially loaded into gasket, upper protection
Film, upper press ring, wherein upper gasket is mounted on middle pressure ring, will be pushed power and is acted on upper press ring, make gasket with it is explosion-proof
Sealing ring, which is deformed, reaches sealing state, upper press ring generated under the action of lower pressure extrusion expansion and with explosion-proof valve interior wall
It combines closely, reaches tightening state.
2. the production method of battery cover board blast resistance construction according to claim 1, it is characterised in that：Including step 7, use
Pneumatic punching machine applies lower pressure to explosion-proof valve body upper port wall, forms it into the back-off position that thickness is 1.5mm, makes inner components
Intimate-association state is kept not generate rebound phenomenon.
3. the production method of battery cover board blast resistance construction according to claim 2, it is characterised in that：In step 3 and step
The weld seam face to explosion-proof valve body and battery cover board substrate is impacted with the air pressure of 0.6MPa between four, the attack time is no less than
40S checks the air-tightness in weld seam face, reaches no gas leakage state.
4. the production method of battery cover board blast resistance construction according to claim 3, it is characterised in that：In step 4 and step
Lower protective film 40S or more is impacted from explosion-proof valve body lower end with the air pressure of 0.2 ~ 0.25MPa between five, checks lower protection membrane structure
Air-tightness reaches no gas leakage state.
5. according to the production method of claim 1 ~ 4 any one of them battery cover board blast resistance construction, it is characterised in that：Described
Welding manner is electric resistance welding, Laser Welding or ultrasonic bond.
6. the production method of battery cover board blast resistance construction according to claim 5, it is characterised in that：The upper gasket
It is all made of polytetrafluoroethylene material with lower seal pad.
7. the production method of battery cover board blast resistance construction according to claim 6, it is characterised in that：Described is explosive-proof sealed
Circle is integrally formed using fluorubber material high-temperature injection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510959418.XA CN105405992B (en) | 2015-12-21 | 2015-12-21 | A kind of production method of battery cover board blast resistance construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510959418.XA CN105405992B (en) | 2015-12-21 | 2015-12-21 | A kind of production method of battery cover board blast resistance construction |
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| Publication Number | Publication Date |
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| CN105405992A CN105405992A (en) | 2016-03-16 |
| CN105405992B true CN105405992B (en) | 2018-08-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3115935A1 (en) * | 2020-10-29 | 2022-05-06 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Safety device adaptable to an electrochemical cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391367B (en) * | 2019-08-08 | 2022-01-28 | 宁德时代新能源科技股份有限公司 | Cap assembly for secondary battery and secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07272707A (en) * | 1994-03-30 | 1995-10-20 | Sony Corp | Pressure releasing valve |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201741737U (en) * | 2010-03-16 | 2011-02-09 | 包雄伟 | Anti-explosion device of batteries |
| CN102299282A (en) * | 2010-06-28 | 2011-12-28 | 黎永康 | Explosion-proof device of power lithium battery top cover and manufacturing method thereof |
| CN101901886A (en) * | 2010-07-15 | 2010-12-01 | 东莞新能源电子科技有限公司 | Power battery explosion protection device |
| CN203674285U (en) * | 2014-01-23 | 2014-06-25 | 包雄伟 | Battery comprising explosion-proof security structure |
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| CN105405992A (en) | 2016-03-16 |
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Denomination of invention: Production method of explosion-proof structure of battery cover plate Effective date of registration: 20190729 Granted publication date: 20180803 Pledgee: Guangdong Finance Inclusive Finance (Huizhou) Financing Guarantee Co., Ltd. Pledgor: GUANGDONG YANG HOLLEY NEW MATERIALS CO., LTD. Registration number: 2019440000279 |
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