CN201946658U - Power battery anti-explosion valve and power battery - Google Patents

Power battery anti-explosion valve and power battery Download PDF

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Publication number
CN201946658U
CN201946658U CN2011200266806U CN201120026680U CN201946658U CN 201946658 U CN201946658 U CN 201946658U CN 2011200266806 U CN2011200266806 U CN 2011200266806U CN 201120026680 U CN201120026680 U CN 201120026680U CN 201946658 U CN201946658 U CN 201946658U
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China
Prior art keywords
pressure disc
rupture pressure
power battery
metal
valve body
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Expired - Fee Related
Application number
CN2011200266806U
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Chinese (zh)
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陆国强
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Individual
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Individual
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Priority to CN2011200266806U priority Critical patent/CN201946658U/en
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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

Abstract

The utility model discloses a power battery anti-explosion valve, which comprises an upper press part, an upper anti-explosion film, a metal anti-explosion film press part, a metal anti-explosion film, a metal anti-explosion film seat, a lower anti-explosion film and a lower press part which are sequentially arranged from top to bottom. The metal anti-explosion film press part, the metal anti-explosion film seat and the lower press part are all provided with a support part located in the middle. The support part is provided with an air vent. The upper press part, the metal anti-explosion film press part, the metal anti-explosion film seat and the lower press part are all plastic parts. The upper anti-explosion film and the lower anti-explosion film are plastic films. The metal anti-explosion film is a metal film. Adjacent parts are connected in glue joint mode. The power battery comprises a battery cover, a valve body connecting piece and a power battery anti-explosion valve. The power battery anti-explosion valve is installed in the valve body connecting piece, seal rings are placed on the power battery anti-explosion valve and the valve body connecting piece, and the battery cover is welded to the valve body connecting piece. The power battery anti-explosion valve and the power battery has more reliable technical performances, is easier to realize functions, has lower cost and can avoid explosions of the power battery more effectively.

Description

A kind of power battery explosion protection valve and electrokinetic cell
Technical field
The utility model relates to the power battery explosion protection technical field, the electrokinetic cell that is specifically related to a kind of power battery explosion protection valve and is made of this power battery explosion protection valve.
Background technology
The capacity of electrokinetic cell is bigger, can discharge bigger energy when it goes wrong, and sets off an explosion, and personnel around giving and equipment work the mischief and damages.Therefore, electrokinetic cell not being blasted when going wrong, is the primary safe practice that electrokinetic cell will be realized.
Referring to Fig. 1, Fig. 2, the power battery explosion protection valve of prior art comprises valve body 101, this valve body 101 has the up big and down small annular element of cavity for the middle part, the cavity on the bigger top of valve body 101 forms installation room, the cavity of the less bottom of valve body 101 forms down installation room, be disposed with upper press ring 102, first sealing ring 103, last polypropylene screen 104, insulation pressure ring 105, aluminium film 106 and second sealing ring 107 in the last installation room from top to bottom, be disposed with down pressure ring 108, following polypropylene screen 109, the 3rd sealing ring 110 in the following installation room from top to bottom.In the power battery explosion protection valve, realize the protection of the aluminium film 106 of centre is prevented the destruction of electrolyte to aluminium film 106 by last polypropylene screen 104 and following polypropylene screen 109.Simultaneously, last polypropylene screen 104 and following polypropylene screen 109 also play explosion-proof.Prevent the redox reaction between aluminium film 106 and the stainless valve body 101, be provided with insulation pressure ring 105 in the upper end of aluminium film 106, aluminium film 106 is placed the positive middle part of insulation pressure ring 105, make between the inwall of aluminium film 106 and valve body 101 and leave certain interval.In use, the power battery explosion protection valve is installed on battery cover 111.
Yet also there is following deficiency in above-mentioned power battery explosion protection valve:
Forward and reverse protection pressure is close.In the actual use of electrokinetic cell, when the pressure outside battery was higher than in the battery, battery itself did not damage, and makes battery failure but explosion-proof valve can break; Simultaneously, in use the temperature difference because of environment forms air pressure change, make the trilamellar membrane sheet (go up polypropylene screen 104, aluminium film 106, polypropylene screen 109) down of battery be in the pressure effect of positive and negative alternate cycles, easily make the power battery explosion protection valve fatigue failure occur.
The assemble sequence of trilamellar membrane sheet is after compressing down earlier polypropylene screen 109, pack into successively again aluminium film 106, go up polypropylene screen 104,101 mouthfuls of valve bodies are tightened up by certain pressure in the back, produce pressure by 101 mouthfuls of distortion of valve body, realize aluminium film 106, go up the sealing of polypropylene screen 104 in valve body 101.There is following deficiency in this spline structure, A. can't detect aluminium film 106, go up the sealing property of polypropylene screen 104 in valve body 101, aluminium film 106 may appear in the finished product of producing, upward polypropylene screen 104 does not have sealing function in valve body 101, makes the quality of the finished product of producing can not get guaranteeing; B. realize sealing reliably for the trilamellar membrane sheet, need to place a plurality of sealing rings; C. aluminium film 106, to go up the sealing of polypropylene screen 104 in valve body 101 relevant with closing in pressure, pressure is little during closing in, it is unreliable to seal, and when pressure is big, can produce the failure by shear effect to film.
Valve body 101, upper press ring 102, following pressure ring 108 and insulation pressure ring 105 all will be processed by precision turning.Particularly valve body 101, its complex structure, and processing cost is higher.And the meeting appearance is bad in the production process of valve body 101, and entire product is scrapped, and increases cost.
Battery cover 111 is welded in the process of battery case front end; need high temperature to vacuumize processing; cause inner two chamber pressure up and down greater than external pressure; trilamellar membrane sheet in the valve body 101 is risen outward; simultaneously because polypropylene screen easily stretching under hot conditions; cause polypropylene screen to damage, so when high temperature vacuumizes drying, need valve body 101 is advanced special protection.
For preventing the generation redox reaction between aluminium film 106 and the stainless valve body 101, the essential assurance insulated between aluminium film 106 and the stainless valve body 101 during production, be aluminium film 106 with valve body 101 between can not contact, aluminium film 106 need correctly be placed on the centre of insulation pressure ring 105, make the aluminium film 106 and the inner surface of valve body 101 leave the gap, have a strong impact on production efficiency.
Above-mentioned power battery explosion protection valve is prone to fatigue failure, the sealing property of trilamellar membrane sheet in valve body 101 is difficult to guarantee, its technical performance is reliable inadequately, the course of processing of above-mentioned power battery explosion protection valve is comparatively complicated simultaneously, the link that should be noted that in process of production is more, influence whole production efficient, also increased cost.
The utility model content
The purpose of this utility model is to overcome deficiency of the prior art, the power battery explosion protection valve that a kind of technical performance is reliable more, realization is simple more, processing cost is lower is provided, and this power battery explosion protection valve can more effectively must prevent the generation of electrokinetic cell blast.
The purpose of this utility model realizes by following scheme: a kind of power battery explosion protection valve, comprise the last casting die that sets gradually from top to bottom, last rupture pressure disc, metal rupture pressure disc casting die, the metal rupture pressure disc, metal rupture pressure disc base, following rupture pressure disc and piece under pressure, wherein, described going up forms the first installation cavity between casting die and the described metal rupture pressure disc base, the described rupture pressure disc of going up, metal rupture pressure disc casting die, the metal rupture pressure disc all is arranged at described first cavity is installed, form second between described metal rupture pressure disc base and the described piece under pressure cavity is installed, described rupture pressure disc down is arranged at described second cavity is installed, described metal rupture pressure disc casting die, described metal rupture pressure disc base, described piece under pressure all has the support portion that is positioned at the middle part, described support portion is provided with air vent hole, the described casting die of going up, described metal rupture pressure disc casting die, described metal rupture pressure disc base and described piece under pressure are working of plastics, the described rupture pressure disc of going up, described rupture pressure disc down is a plastic film, described metal rupture pressure disc is a metallic membrane, glueds joint between the adjacent component.
Another purpose of the present utility model is to provide a kind of electrokinetic cell.
Another purpose of the present utility model realizes by following scheme: a kind of electrokinetic cell, comprise the battery cover that is positioned at the electrokinetic cell front end, the valve body connector and the described power battery explosion protection valve of claim 1 of tubular, described battery cover has installing hole, described valve body connector is arranged in the described installing hole, described power battery explosion protection valve is arranged in the described valve body connector, is provided with sealing ring between described power battery explosion protection valve and the described valve body connector.
Described sealing ring is arranged between described metal rupture pressure disc base and the described piece under pressure.
Advantage of the present utility model is:
The utility model carries out reverse support by metal rupture pressure disc casting die, metal rupture pressure disc base, piece under pressure to the trilamellar membrane sheet, can also protect battery when high reverse pressure occurring.Simultaneously, last rupture pressure disc, metal rupture pressure disc, following rupture pressure disc stressed almost are zero, so the utility model is not prone to fatigue failure, and the life-span is longer.
In the utility model, realize pasting sealing with glue between plastic and the trilamellar membrane sheet, method is simple and reliable, simultaneously, whether the trilamellar membrane sheet sticks on earlier corresponding plastic respectively when assembling, can examine side respectively and leak gas before total assembling, thereby the sealing that guarantees three groups of diaphragms is reliable.
The utility model is made of working of plastics and trilamellar membrane sheet, and simple in structure, production cost reduces greatly.
Because valve body separates with battery cover, battery cover and battery case can be under the negative pressure that more high temperature is bigger dried.And less because of valve volume, can carry out long-time low temperature rough vacuum dried to it, its structure is independent simultaneously, and protection work is also simple relatively.
In the utility model, the aluminium film can not contact with stainless steel part, has avoided the generation of redox reaction.
In sum, the utility model more can effectively be protected battery, extends the life of a cell; Assemble method of the present utility model and establishing require very simple; Cost of the present utility model obviously falls at the end, and production efficiency improves greatly.
Description of drawings
Fig. 1 is the structural representation that the power battery explosion protection valve of prior art cooperates with battery cover.
Fig. 2 is the power battery explosion protection valve of prior art and the decomposition texture schematic diagram of battery cover.
Fig. 3 is the structural representation that the power battery explosion protection valve of electrokinetic cell of the present utility model cooperates with battery cover.
Fig. 4 is the power battery explosion protection valve of electrokinetic cell of the present utility model and the decomposition texture schematic diagram of battery cover.
In Fig. 1, Fig. 2, include:
Valve body 101; Upper press ring 102; First sealing ring 103; Last polypropylene screen 104; Insulation pressure ring 105; Aluminium film 106; Second sealing ring 107; Following pressure ring 108; Following polypropylene screen 109; The 3rd sealing ring 110; Battery cover 111;
In Fig. 3, Fig. 4, include:
Last casting die 201; Last rupture pressure disc 202; Metal rupture pressure disc casting die 203; Metal rupture pressure disc 204; Metal rupture pressure disc base 205; Following rupture pressure disc 206; Piece under pressure 207; Battery cover 208; Valve body connector 209; Sealing ring 210.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, a kind of power battery explosion protection valve, comprise the last casting die 201 that sets gradually from top to bottom, last rupture pressure disc 202, metal rupture pressure disc 204 casting dies 203, metal rupture pressure disc 204, metal rupture pressure disc base 205, following rupture pressure disc 206 and piece under pressure 207, wherein, form first between last casting die 201 and the metal rupture pressure disc base 205 cavity is installed, last rupture pressure disc 202, metal rupture pressure disc 204 casting dies 203, metal rupture pressure disc 204 all is arranged at first cavity is installed, form second between metal rupture pressure disc base 205 and the piece under pressure 207 cavity is installed, following rupture pressure disc 206 is arranged at second cavity is installed, metal rupture pressure disc 204 casting dies 203, metal rupture pressure disc base 205, piece under pressure 207 all has the support portion that is positioned at the middle part, the support portion is provided with air vent hole, last casting die 201, metal rupture pressure disc 204 casting dies 203, metal rupture pressure disc base 205 and piece under pressure 207 are working of plastics, last rupture pressure disc 202, following rupture pressure disc 206 is a plastic film, metal rupture pressure disc 204 is a metallic membrane, glueds joint between the adjacent component.
In the utility model, as shown in Figure 1, last casting die 201 is a torus, and its upper end has the edge that extends internally, and its underpart is a ring part; Metal rupture pressure disc 204 casting dies 203 are circular piece, its top is ring part, the ring part on the top of metal rupture pressure disc 204 casting dies 203 contacts with the ring part of the bottom of last casting die 201, and form first between them cavity is installed, the centre of metal rupture pressure disc 204 casting dies 203 has the support portion, and the support portion is provided with air vent hole; Metal rupture pressure disc base 205 is a circular piece, and the external diameter on its top is bigger than the external diameter of its underpart, and its underpart embeds in the piece under pressure 207; Piece under pressure 207 is a circular piece, and the middle part of its lower end has the support portion, and the support portion is provided with air vent hole, and its top is ring part, and its underpart of metal rupture pressure disc base 205 embeds in the ring part of piece under pressure 207.
As shown in Figure 2, a kind of electrokinetic cell, comprise the battery cover 208 that is positioned at the electrokinetic cell front end, the valve body connector 209 and the power battery explosion protection valve of tubular, battery cover 208 has installing hole, valve body connector 209 is arranged in the installing hole, the power battery explosion protection valve is arranged in the valve body connector 209, is provided with sealing ring 210 between power battery explosion protection valve and the valve body connector 209.Wherein, sealing ring 210 is arranged between metal rupture pressure disc base 205 and the piece under pressure 207.Welding between battery cover 208 and the valve body connector 209.
Procedure of processing of the present utility model is: a. fastens with glue metal rupture pressure disc 204 and metal rupture pressure disc 204 casting dies 203 earlier, detects its air-tightness; B. a step is ready-made assembly is coated sealing glue and is reinstalled in the metal rupture pressure disc base 205, detects its air-tightness; C. will descend the rupture pressure disc 206 metal rupture pressure disc base 205 that fastens with glue, and fasten with glue again and go up piece under pressure 207, detect its air-tightness; D. will go up rupture pressure disc 202 and stick on metal rupture pressure disc 204 casting dies 203 upsides, casting die 201 on last rupture pressure disc 202 upsides are pasted detects its air-tightness again; E. after loading onto sealing ring 210 between metal rupture pressure disc base 205 and the piece under pressure 207, the power battery explosion protection valve has been assembled, and can carry out high temperature and vacuumize dried; F. valve body connector 209 is connected to 208 one-tenth battery cover components of battery cover; G. the battery cover component of at last the power battery explosion protection valve being packed into is depressed valve body connector 209 upper surfaces and is formed screens.
Should be noted that at last; above content is only in order to the explanation the technical solution of the utility model; but not to the restriction of the utility model protection range; the simple modification that those of ordinary skill in the art carries out the technical solution of the utility model or be equal to replacement does not all break away from the essence and the scope of technical solutions of the utility model.

Claims (3)

1. power battery explosion protection valve, it is characterized in that: described power battery explosion protection valve comprises the last casting die that sets gradually from top to bottom, last rupture pressure disc, metal rupture pressure disc casting die, the metal rupture pressure disc, metal rupture pressure disc base, following rupture pressure disc and piece under pressure, wherein, described going up forms the first installation cavity between casting die and the described metal rupture pressure disc base, the described rupture pressure disc of going up, metal rupture pressure disc casting die, the metal rupture pressure disc all is arranged at described first cavity is installed, form second between described metal rupture pressure disc base and the described piece under pressure cavity is installed, described rupture pressure disc down is arranged at described second cavity is installed, described metal rupture pressure disc casting die, described metal rupture pressure disc base, described piece under pressure all has the support portion that is positioned at the middle part, described support portion is provided with air vent hole, the described casting die of going up, described metal rupture pressure disc casting die, described metal rupture pressure disc base and described piece under pressure are working of plastics, the described rupture pressure disc of going up, described rupture pressure disc down is a plastic film, described metal rupture pressure disc is a metallic membrane, glueds joint between the adjacent component.
2. electrokinetic cell, it is characterized in that: described electrokinetic cell comprises the battery cover that is positioned at the electrokinetic cell front end, the valve body connector and the described power battery explosion protection valve of claim 1 of tubular, described battery cover has installing hole, described valve body connector is arranged in the described installing hole, described power battery explosion protection valve is arranged in the described valve body connector, is provided with sealing ring between described power battery explosion protection valve and the described valve body connector.
3. according to the described electrokinetic cell of claim 2, it is characterized in that: described sealing ring is arranged between described metal rupture pressure disc base and the described piece under pressure.
CN2011200266806U 2011-01-26 2011-01-26 Power battery anti-explosion valve and power battery Expired - Fee Related CN201946658U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200266806U CN201946658U (en) 2011-01-26 2011-01-26 Power battery anti-explosion valve and power battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200266806U CN201946658U (en) 2011-01-26 2011-01-26 Power battery anti-explosion valve and power battery

Publications (1)

Publication Number Publication Date
CN201946658U true CN201946658U (en) 2011-08-24

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Application Number Title Priority Date Filing Date
CN2011200266806U Expired - Fee Related CN201946658U (en) 2011-01-26 2011-01-26 Power battery anti-explosion valve and power battery

Country Status (1)

Country Link
CN (1) CN201946658U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104520952A (en) * 2012-08-09 2015-04-15 Nok株式会社 Explosion-proof valve and manufacturing method therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104520952A (en) * 2012-08-09 2015-04-15 Nok株式会社 Explosion-proof valve and manufacturing method therefor
CN104520952B (en) * 2012-08-09 2017-08-08 Nok株式会社 Explosion-proof valve and its manufacture method

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110824

Termination date: 20140126