CN104241568A - Valve with isolated liquid injection and constant-pressure functions of lithium ion battery - Google Patents
Valve with isolated liquid injection and constant-pressure functions of lithium ion battery Download PDFInfo
- Publication number
- CN104241568A CN104241568A CN201310245513.4A CN201310245513A CN104241568A CN 104241568 A CN104241568 A CN 104241568A CN 201310245513 A CN201310245513 A CN 201310245513A CN 104241568 A CN104241568 A CN 104241568A
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- China
- Prior art keywords
- pressure
- seal
- sealing
- battery
- lithium ion
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Classifications
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- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
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- 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
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses a valve with isolated liquid injection and constant-pressure functions of a lithium ion battery. The valve comprises a valve body, seal rings, a seal pressing plate, a corrugated spring, a compression spring gasket, a seal gasket, a threaded compression seat and the like, wherein the valve body is installed on the top end of a battery shell; the valve body and the battery shell form a seal container in a sealing mode; in liquid injection, a liquid injection needle penetrates through the seal gasket, and the seal gasket and the outer diameter of the liquid injection needle are sealed so as to play the role of isolating environment gas; when the inner pressure is increased due to gas generated by a battery cell, the seal between the seal pressing plate which is pressed on the seal ring and the seal ring is invalid so as to form pressure leakage; after the gas generated by the battery cell in the battery shell is discharged, the pressure in the battery shell disappears, the effect to the corrugated spring caused by the increased pressure intensity in the battery disappears, namely the corrugated spring is reset to be in the sealed state; the inner pressure of the battery shell always keeps the constant-pressure state; the valve with the isolated liquid injection and constant-pressure functions of the lithium ion battery can obviously improve the moisture seepage reduction function of a lithium ion battery liquid injection technology; the constant-pressure valve function can prevent that the pressure in the battery exceeds the critical seal pressure of the seal weld, and can effectively prevent the liquid leakage risk caused by the damage to a battery seal structure because of inner pressure increasing due to excessive generated gas.
Description
Technical field
The present invention relates to a kind of lithium ion battery manufacture and structure, particularly lithium ion battery isolation fluid injection constant voltage two duty valve.
Technical background
Lithium ion battery is widely used in digital electronic goods, electric tool, Moped Scooter, electric automobile, the energy storage of photovoltaic generation and wind power generation peak-trough electricity, use in recent years along with lithium ion battery is more and more extensive, some defects that lithium ion battery exists start to come out, some leakages, what have is on fire, what have also blasts, the reason producing these problems has many-side, wherein one of main reason comes from this kind of battery to belong to liquid cell, electrolyte species is had in battery, these liquid substances are by overheated rear vaporized expanding, be expanded to necessarily when pressing just likely by the solder joint place spalling of battery case, the crack of spalling is leaked, these leak electrolyte and easily ignited, existing cell pressure controls also there is some problems, great majority have employed rupture disk structure, these rupture disks need to arrive the high critical point to rupture disk of battery case internal pressure just meeting explosion, when critical point lower than rupture disk of the intensity of pressure critical point of seal-weld, just easily by interior pressure spalling.Improving this structure, is the very important technical safety measures of lithium ion battery.
Research confirms, lithium ion battery aerogenesis problem and manufacturing process have substantial connection very, existing lithium ion battery have employed open fluid injection, in drying shed, battery liquid-filling mouth is in open state, air in environment directly contacts with electrolyte, still injecting electrolytic solution mouth open state is in chemical synthesis technology, electrolyte contacts with surrounding air for a long time, steam in environment directly infiltrates in electrolyte, research also confirms, in electrolyte, the more battery producing gas of moisture are more serious, improve this open fluid injection, chemical synthesis technology, very important meaning is had safely to raising lithium ion battery.The ZL201120404132.2 that the open applicant of patent gazette proposes adopts the lithium battery technology scheme of puncture liquid-filling valve, although institute have employed puncture liquid-filling valve technical scheme, the object that isolation liquid injection process link moisture infiltrates can be played, but, after this patent reckons without fluid injection, lithium ion battery aerogenesis causes that interior voltage rise is high exists welding line structure safety problem, and its limitation restricts the application of this technology.
Summary of the invention
Realize the technical scheme of invention
Lithium ion battery isolation fluid injection constant pressure valve two duty valve, by valve body, sealing ring, sealing clamp, combination disk spring, pressing spring packing ring, gland, sealing gasket, screw thread wedge forms, valve body is installed on battery case top, put in battery case containing electrolyte battery core, battery case and battery core, sealed container structure is formed after valve body installs, isolation is in environment, concrete structure is, sealing ring slot is provided with in valve body chamber, sealing ring is installed in sealing ring slot, above sealing ring, sealing clamp is installed, wave mode spring is installed in the top of sealing clamp, pressing spring packing ring is installed in the top of wave mode spring, pressing spring packing ring is locked by gland and valve body, the below that valve body installs sealing ring is provided with sealing gasket position, sealing gasket is installed in sealing gasket position, it is spacing that sealing gasket keeps off convex edge by the sealing gasket of valve body, sealing gasket is sealed by the internal thread locking below screw thread wedge and valve body.
The lithium ion battery liquid injection of lithium ion battery isolation fluid injection constant voltage two duty valve configuration changes into step and is:
The first step: valve body and battery case seal and assemble;
Second step: fitting tight pad;
3rd step: assembling screw thread wedge;
4th step: assembling injection needle;
5th step: fluid injection;
6th step: withdraw from injection needle;
7th step: fitting tight circle;
8th step: fitting tight pressing plate;
9th step: assembling wave mode spring;
Tenth step: assembling pressing spring packing ring;
11 step: assembling gland;
During fluid injection, the fluid injection of injection needle puncture seal pad, the radial outer wall of sealing gasket and injection needle still keeps sealing, injection needle is extracted after fluid injection terminates, the elastic expansion effect of sealing gasket material, pin hole is closed by material expansion effect, can maintain at ambient pressure and isolate with surrounding air.
When battery core aerogenesis mineralization pressure in battery case, the pin hole that first interior pressure has been formed from sealing gasket extrudes, when continuing to increase from pin hole extrusion gas, the sealing clamp being pressed in sealing ring promotes to be pressed in the wave mode spring of sealing clamp by pressure action, wave mode spring is compressed by pressure action, wave mode spring is compressed, the sealing be pressed between the sealing clamp of sealing ring and sealing ring produces leaks, the gas leaked is discharged from the steam vent of gland, after battery core aerogenesis in battery case is discharged, battery case internal pressure disappears, wave mode spring disappears by the pressure action increased in battery, namely reset and be in sealing state.
The battery core of battery case again aerogenesis forms interior pressure when increasing, the sealing clamp being pressed in sealing ring promotes to be pressed in the wave mode spring of sealing clamp by pressure action, wave mode spring is compressed by pressure action, wave mode spring is compressed, the sealing be pressed between the sealing clamp of sealing ring and sealing ring produces leaks, the gas leaked is discharged from the steam vent of gland, after battery core aerogenesis in battery case is discharged, battery case internal pressure disappears, wave mode spring disappears by the pressure action increased in battery, namely reset and be in sealing state, the interior pressure of battery case remains pressure constant state.
Positive effect of the present invention
Lithium ion battery isolation fluid injection constant voltage two duty valve reduces moisture infiltration for lithium ion battery liquid injection technique and can play remarkable improvement, reducing moisture enters in lithium ion battery cell, the side reaction of lithium ion battery chemical process can be reduced, for the stable significance improving battery performance, cell internal pressure can be avoided to exceed the critical-sealing pressure of seal-weld by constant pressure valve function simultaneously, cell sealing-structure effectively can be avoided like this to be damaged because aerogenesis too much causes interior pressure to increase and cause the danger of leakage.
Accompanying drawing explanation
Fig. 1 is the lithium ion battery isolation fluid injection constant voltage two duty valve schematic diagram that the present invention configures combination disk spring 4a;
Fig. 2 is the lithium ion battery isolation fluid injection constant voltage two duty valve schematic diagram that the present invention configures wave mode spring 4b;
Fig. 3 is the lithium ion battery isolation fluid injection constant voltage two duty valve schematic diagram that the present invention configures welding bellows 4c;
Fig. 4 is application example schematic diagram;
Fig. 5 is valve body 1 cutaway view;
Fig. 6 is the lithium ion battery isolation fluid injection constant voltage two duty valve schematic diagram that the present invention configures plunger spring 4d;
In Fig. 1, valve body 1, sealing ring 2, sealing clamp 3, combination disk spring 4a, pressing spring packing ring 5, gland 6, steam vent 6k, sealing gasket 7, screw thread wedge 8;
In Fig. 2, valve body 1, sealing ring 2, sealing clamp 3, wave mode spring 4b, pressing spring packing ring 5, gland 6, steam vent 6k, sealing gasket 7, screw thread wedge 8;
In Fig. 3, steam vent 6k, valve body 1, sealing ring 2, sealing clamp 3, welding bellows 4c, pressing spring packing ring 5, gland 6, sealing gasket 7, screw thread wedge 8;
In Fig. 4, valve body 1, sealing gasket 7, screw thread wedge 8, injection needle 9, battery case 10;
In Fig. 5, valve body 1, sealing ring slot 1a, sealing gasket position 1b, sealing gasket gear convex edge 1c;
In Fig. 6, valve body 1, sealing ring 2, sealing clamp 3, plunger spring 4d, pressing spring packing ring 5, gland 6, steam vent 6k, sealing gasket 7, screw thread wedge 8;
With reference to Fig. 2, Fig. 5, valve body 1 chamber inner seal ring slot 1a installs sealing ring 2, install above sealing ring 2 above sealing clamp 3, sealing clamp 3 and wave mode spring 4b is installed, install pressing spring packing ring 5 above wave mode spring 4b, pressing spring packing ring 5 is locked by the internal thread of gland 6 and valve body 1, and sealing gasket position, the below 1b that valve body 1 installs sealing ring 2 installs sealing gasket 7, it is spacing that sealing gasket 7 keeps off convex edge 1c by sealing gasket, and sealing gasket 7 is sealed by the internal thread locking below the external screw thread of screw thread wedge 8 and valve body 1.
With reference to Fig. 1, Fig. 5, combination disk spring 4a is installed above sealing clamp 3;
With reference to Fig. 3, Fig. 5, erecting and welding bellows 4c above sealing clamp 3;
Specific embodiment
With reference to Fig. 4, valve body 1 is installed on battery case 10 top, constitutes the airtight container of battery and electrolyte; The container that sealing gasket 7 is made up of screw thread wedge 8 press seal, battery case 10 with environment isolating seal, the fluid injection of injection needle 9 puncture seal pad 7, injection needle is extracted after fluid injection terminates, the elastic expansion effect of sealing gasket 7 material, pin hole forms closed pore effect by the elastic expansion effect of sealing gasket 7 material, maintain and environment buffer action, extract the assembly technology after injection needle by following processing step:
With reference to Fig. 1;
The first step: install sealing ring 2;
Second: sealing clamp 3 is installed;
3rd step: install combination disk spring 4a;
4th step: install pressing spring packing ring 5;
5th step: install gland 6;
When battery core aerogenesis mineralization pressure in battery case 10, because sealing gasket 7 has been defined sky defect by injection needle puncture, the needle pore defect that first pressed gas has been formed from sealing gasket 7 extrudes, when continuing to increase from pin hole extrusion gas, the sealing clamp 3 being pressed in sealing ring 2 is subject to pressure action, the sealing clamp 3 being pressed in sealing ring 2 is subject to the combination disk spring 4a that namely pressure action promotes to be pressed in sealing clamp 3, combination disk spring 4a is compressed by pressure action, combination disk spring 4a is compressed, the sealing place seal failure being pressed in the sealing clamp 3 of sealing ring 2 produces leaks, the gas leaked is discharged from the steam vent 6k of gland 6, after battery core aerogenesis in battery case 10 is discharged, battery case 10 internal pressure disappears, combination disk spring 4a disappears by pressure action and resets and is in sealing state.
Battery core in battery case 10 again aerogenesis forms interior pressure when increasing, the pin hole that first interior pressure has been formed from sealing gasket 7 again extrudes, when continuing to increase from pin hole extrusion gas, the sealing clamp 3 being pressed in sealing ring 2 promotes to be pressed in the combination disk spring 4a of sealing clamp 3 by pressure action, combination disk spring 4a is compressed by pressure action, combination disk spring 4a is compressed, the sealing clamp 3 being pressed in sealing ring 2 produces and leaks, the gas leaked is discharged from the steam vent 6k of gland 6, after battery core aerogenesis in battery case 10 is discharged, battery case 10 internal pressure disappears, combination disk spring 4a disappears by pressure action and resets and is in sealing state, the interior pressure of battery case 10 remains pressure constant state.
Described combination disk spring 4a can also select wave mode spring 4b, welding bellows 4c, plunger spring 4d wherein a kind of, preferred wave mode spring 4b.
Described combination disk spring 4a is made up of multi-disc disk spring.
Described sealing ring (2), sealing gasket (7) is high-molecular organic material, in order to tolerate the corrosivity of the electrolyte in lithium ion battery, select the wherein a kind of of ethylene propylene diene rubber, perfluoroelastomers, polytetrafluoroethylmaterial material, preferred perfluoroelastomers.
Claims (3)
1. lithium ion battery isolation fluid injection constant voltage two duty valve, by valve body (1), sealing ring (2), sealing clamp (3), wave mode spring (4b), pressing spring packing ring (5), gland (6), sealing gasket (7), screw thread wedge (8) forms, it is characterized in that: sealing ring (2) is installed in inner seal ring slot, valve body (1) chamber (1a), sealing clamp (3) is installed in sealing ring (2) top, wave mode spring (4b) is installed in sealing clamp (3) top, pressing spring packing ring (5) is installed in wave mode spring (4b) top, pressing spring packing ring (5) is locked by the internal thread of gland (6) and valve body (1), sealing gasket (7) is installed in the sealing gasket position, below (1b) that valve body (1) installs sealing ring (2), it is spacing that sealing gasket (7) keeps off convex edge (1c) by sealing gasket, sealing gasket (7) is sealed by the external screw thread of screw thread wedge (8) and the internal thread locking of valve body (1) below.
2. it is characterized in that by lithium ion battery according to claim 1 isolation fluid injection constant voltage two duty valve: wave mode spring 4b, welding bellows (4c), plunger spring (4d), combination disk spring (4a) can also be chosen, preferred wave mode spring 4b.
3. it is characterized in that by lithium ion battery isolation fluid injection constant voltage two duty valve according to claim 1: sealing ring (2), sealing gasket (7) is the wherein one of high-molecular organic material ethylene propylene diene rubber, perfluoroelastomers, polytetrafluoroethylene, preferred perfluoroelastomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310245513.4A CN104241568A (en) | 2013-06-09 | 2013-06-09 | Valve with isolated liquid injection and constant-pressure functions of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310245513.4A CN104241568A (en) | 2013-06-09 | 2013-06-09 | Valve with isolated liquid injection and constant-pressure functions of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104241568A true CN104241568A (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310245513.4A Pending CN104241568A (en) | 2013-06-09 | 2013-06-09 | Valve with isolated liquid injection and constant-pressure functions of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104241568A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579198A (en) * | 2017-08-30 | 2018-01-12 | 安徽环鑫电子有限公司 | A kind of capping structure with liquid injection hole explosion-proof valve |
| KR20190004538A (en) * | 2017-07-04 | 2019-01-14 | 주식회사 엘지화학 | Rechargeable battery |
| CN109390503A (en) * | 2018-11-15 | 2019-02-26 | 河北银隆新能源有限公司 | A kind of battery liquid-filling mouth structure and battery |
| CN110421707A (en) * | 2019-06-28 | 2019-11-08 | 安徽凯越电力杆塔有限公司 | A kind of concurrent Anti-leakage mould |
| CN113078368A (en) * | 2021-02-25 | 2021-07-06 | 天津力神电池股份有限公司 | Semi-automatic inflation expansion equipment for cylindrical lithium ion battery cell |
| CN115411471A (en) * | 2022-08-24 | 2022-11-29 | 天能新能源(湖州)有限公司 | Battery hole plug structure capable of exhausting and injecting liquid and lithium ion battery |
| CN117878551A (en) * | 2024-03-05 | 2024-04-12 | 广东东博智能装备股份有限公司 | Anti-overflow and anti-leakage liquid injection machine for battery |
| CN117878551B (en) * | 2024-03-05 | 2024-05-17 | 广东东博智能装备股份有限公司 | Anti-overflow and anti-leakage liquid injection machine for battery |
-
2013
- 2013-06-09 CN CN201310245513.4A patent/CN104241568A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102173031B1 (en) * | 2017-07-04 | 2020-11-02 | 주식회사 엘지화학 | Rechargeable battery |
| KR20190004538A (en) * | 2017-07-04 | 2019-01-14 | 주식회사 엘지화학 | Rechargeable battery |
| CN110024173A (en) * | 2017-07-04 | 2019-07-16 | 株式会社Lg化学 | Secondary cell |
| EP3518314A4 (en) * | 2017-07-04 | 2020-01-15 | LG Chem, Ltd. | Secondary battery |
| CN110024173B (en) * | 2017-07-04 | 2022-02-22 | 株式会社Lg化学 | Secondary battery |
| US11374285B2 (en) | 2017-07-04 | 2022-06-28 | Lg Energy Solution, Ltd. | Secondary battery |
| CN107579198A (en) * | 2017-08-30 | 2018-01-12 | 安徽环鑫电子有限公司 | A kind of capping structure with liquid injection hole explosion-proof valve |
| CN109390503A (en) * | 2018-11-15 | 2019-02-26 | 河北银隆新能源有限公司 | A kind of battery liquid-filling mouth structure and battery |
| CN110421707A (en) * | 2019-06-28 | 2019-11-08 | 安徽凯越电力杆塔有限公司 | A kind of concurrent Anti-leakage mould |
| CN113078368A (en) * | 2021-02-25 | 2021-07-06 | 天津力神电池股份有限公司 | Semi-automatic inflation expansion equipment for cylindrical lithium ion battery cell |
| CN115411471A (en) * | 2022-08-24 | 2022-11-29 | 天能新能源(湖州)有限公司 | Battery hole plug structure capable of exhausting and injecting liquid and lithium ion battery |
| CN117878551A (en) * | 2024-03-05 | 2024-04-12 | 广东东博智能装备股份有限公司 | Anti-overflow and anti-leakage liquid injection machine for battery |
| CN117878551B (en) * | 2024-03-05 | 2024-05-17 | 广东东博智能装备股份有限公司 | Anti-overflow and anti-leakage liquid injection machine for battery |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |