CN102903866B - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
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- CN102903866B CN102903866B CN201110209136.XA CN201110209136A CN102903866B CN 102903866 B CN102903866 B CN 102903866B CN 201110209136 A CN201110209136 A CN 201110209136A CN 102903866 B CN102903866 B CN 102903866B
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- battery
- valve body
- poppet shaft
- spring
- plate
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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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The present invention discloses a lithium ion battery, which comprises a battery upper cover (2) adopted as a battery positive electrode, a battery case (3) adopted as a battery negative electrode, and a winding-type battery core arranged inside the battery case, wherein a bidirection safety valve (1) is arranged on the battery upper cover (2), can be used for liquid injection during a battery production process, and can be automatically sealed after liquid injection, such that characteristics of pressure relief and explosion prevention are provided when internal pressure of the battery is excessively high, and the sealing state can be restored again when the internal pressure of the battery is restored to the normal state.
Description
Technical field
The present invention relates to field of batteries, particularly relate to the lithium ion battery that a kind of device has bidirectional relief valve.
Background technology
Compared with the battery of the other types such as plumbic acid, NI-G, ni-mh, lithium ion battery has that specific capacity is large, operating voltage is high, has extended cycle life, volume is little, the advantage such as lightweight, not only be used widely on a portable electronic device, and be widely used in electric automobile, electric bicycle and electric tool etc. in medium-sized electrical equipment, the Main way of the current Shi Ge great battery of lithium-ion-power cell especially wherein producer development.But, lithium ion battery in use, when being subject to short circuit, high heat, overcharge or the affecting of the abnormal factors such as overdischarge time, inside battery easily has gases at high pressure to produce, and the distortion of battery container will be caused even to produce the danger of blast.Therefore, for the lithium ion battery of the hard shells such as metal, in order to stop the potential safety hazard caused because inner pressure of battery raises in battery use procedure, on battery, explosion-protection equipment must be pacified by device.Safe explosion-proof device conventional on current lithium ion battery mainly contains two kinds of forms:
Be that processing has the indentation of certain depth on the metal housing surface of battery, when inner pressure of battery is elevated to a certain degree, indentation can break step-down automatically, bursts to prevent battery.This indentation explosion-protection equipment is difficult to accurate control because of its degree of depth, and the stress consistency at indentation position is poor, is difficult to ensure its action message.
Another kind is on the explosionproof hole of battery metal housing cover plate, process one deck rupture pressure disc, and when inner pressure of battery is elevated to a certain degree, rupture pressure disc can break step-down automatically, reaches the object preventing battery from bursting.But, cover plate explosionproof hole is processed rupture pressure disc not only high to production equipment requirement, and due to processing technology complexity, and increase cost.In addition, rupture pressure disc also cannot ensure constant fracture pressure, still there is certain potential safety hazard.
Further, above-mentioned two kinds of lithium ion battery safety devices, all again can not recover, make whole battery failure and scrap after indentation or rupture pressure disc break.
In addition, lithium ion battery needs to inject electrolyte to inside battery in process of production, is generally open a through hole at the upper cover of battery, also will again by its shutoff after having noted electrolyte, fluid injection operation more complicated.
Summary of the invention
Problem to be solved by this invention is the defect overcoming above-mentioned prior art, a kind of device is provided to have the lithium ion battery of bidirectional relief valve, this bidirectional relief valve in cell production process for fluid injection and after fluid injection self-closed, can pressure-relief explosion-proof again can recover sealing state when inner pressure of battery recovers normal when inner pressure of battery is too high in using.
Technical scheme of the present invention is: the takeup type battery core that the present invention includes the cell cover as anode, the battery container as battery cathode and be placed in battery container, cell cover is arranged the bidirectional relief valve that has fluid injection and explosion prevention function concurrently.
Described bidirectional relief valve comprises valve body, bonnet, poppet shaft and is sleeved on the spring sealed assembly in poppet shaft, described bonnet covers for being fixedly installed on lithium ion battery by described valve body, described valve body outer ring suit sealing ring, described poppet shaft is installed on described body cavity, described poppet shaft one end is stretched to inside battery cover from described valve body lower portion, the other end stretches out from described bonnet top, and described poppet shaft can be up and down and will described valve body and described bonnet be made inside battery and the outside channel seal that communicates by described spring sealed assembly or open.
Described spring sealed assembly comprises back-moving spring, interior sealing gasket, upper spring seat, external seal pad, pressure spring, lower spring cup, described back-moving spring is clipped between the described poppet shaft upper limit shaft shoulder and a shoulder of described body cavity, described upper spring seat, described pressure spring and described lower spring cup to be set in described poppet shaft and to be in described valve body lower portion, gas channel is provided with between described upper spring seat inner surface and described poppet shaft outer surface, described interior sealing gasket fixed cover to be loaded in described poppet shaft and suitable with described upper spring seat inner surface top, described external seal pad is fixedly set in described upper spring seat outer surface of upper and suitable with described body cavity lower end.
The sealing contact surface of described interior sealing gasket is the arc surface of revolution, and described upper spring seat inner surface top is the taper surface of revolution.
Described body cavity lower end and described external seal pad outer surface are the taper surface of revolution.
Described battery core comprises positive plate, negative plate, barrier film, anode collection plate, negative pole currect collecting plate, after described positive plate and described negative plate separate winding shaping by described barrier film, top connects described anode collection plate, bottom connects described negative pole currect collecting plate, described anode collection plate contacts with described cell cover, be provided with insulating washer between described cell cover and described battery container, between described anode collection plate and described battery container, described negative pole currect collecting plate contacts with described battery container inner bottom part.
The invention has the beneficial effects as follows: the present invention arranges the bidirectional relief valve that has fluid injection and explosion prevention function concurrently on cell cover, this bidirectional relief valve in cell production process for fluid injection and after fluid injection self-closed, can pressure-relief explosion-proof again can recover sealing state when inner pressure of battery recovers normal when inner pressure of battery is too high in using; The poppet shaft of bidirectional relief valve of the present invention can be up and down in valve body, can will valve body and bonnet make inside battery and the outside channel seal that communicates or open under the effect of spring sealed assembly, to realize the effect of corresponding fluid injection and exhaust, compact conformation, install simple; Back-moving spring makes spring sealed assembly automatically reset after battery liquid-filling and by outer closure in battery, timely exhaust decompression when pressure spring can make cell internal pressure too high, there is the function of battery anti-explosion, and recover sealing state in time when cell internal pressure reduces.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of bidirectional relief valve of the present invention;
Fig. 3 is the A-A cutaway view in Fig. 2;
Fig. 4 is the structural representation of the present invention's bidirectional relief valve when battery liquid-filling;
Fig. 5 is the structural representation of the present invention's bidirectional relief valve when battery releasing pressure automatically.
Embodiment
Below in conjunction with accompanying drawing, concrete detailed description in detail is done to embodiments of the invention.
As shown in Figure 1, the takeup type battery core comprising the cell cover 2 as anode, the battery container 3 as battery cathode and be placed in battery container 3, battery core comprises positive plate 4, negative plate 5, barrier film 6, anode collection plate 7, negative pole currect collecting plate 8.After positive plate 4 and negative plate 5 separate winding shaping by barrier film 6, top connects anode collection plate 7, bottom connects negative pole currect collecting plate 8, anode collection plate 7 contacts with described cell cover 2, insulating washer 9 is provided with between cell cover 2 and battery container 3, be provided with insulating washer 10 between anode collection plate 7 and battery container 3, negative pole currect collecting plate 8 contacts with battery container 3 inner bottom part; In the middle part of cell cover 2 and anode collection plate 7, the hole that battery inside and outside is communicated is set, an idle bidirectional relief valve 1 in hole, this bidirectional relief valve 1 in cell production process for fluid injection and after fluid injection self-closed, can pressure-relief explosion-proof again can recover sealing state when inner pressure of battery recovers normal when inner pressure of battery is too high in using.
As shown in Figure 2 and Figure 3, the spring sealed assembly that bidirectional relief valve 1 comprises valve body 11, bonnet 12, poppet shaft 13 and is sleeved in poppet shaft 13, spring sealed assembly comprises back-moving spring 15, interior sealing gasket 16, upper spring seat 17, external seal pad 18, pressure spring 19, lower spring cup 20.Valve body 11 outer ring suit sealing ring 14, valve body 11 is fixedly installed in the middle part of lithium ion battery upper cover 2 by bonnet 12, and valve body 11 and bonnet 12 inner chamber are provided with and make inside battery and the outside passage communicated, poppet shaft 13 can be installed on the inner chamber of valve body 11 up and downly, and poppet shaft 13 one end is stretched to inside battery cover from valve body 11 bottom, the other end stretches out from bonnet 12 top, back-moving spring 15 is clipped between the poppet shaft 13 upper limit shaft shoulder 131 and a shoulder of valve body 11 inner chamber, upper spring seat 17, pressure spring 19 and lower spring cup 20 to be set in poppet shaft 13 and to be in valve body 11 bottom, gas channel is provided with between upper spring seat 17 inner surface and poppet shaft 13 outer surface, interior sealing gasket 16 fixed cover to be loaded in poppet shaft 13 and suitable with upper spring seat 17 inner surface top, the sealing contact surface of interior sealing gasket 16 is the arc surface of revolution, upper spring seat 17 inner surface top is the taper surface of revolution, external seal pad 18 is fixedly set in upper spring seat 17 outer surface of upper, the outer surface of external seal pad 18 is the taper surface of revolution suitable with the taper surface of revolution of valve body 11 inner chamber lower end.
Under normal circumstances, sealing ring 14 seals mutually with the installing hole inner chamber of cell cover 2 one, and interior sealing gasket 16 seals mutually with upper spring seat 17 inner surface top, and external seal pad 18 seals mutually with valve body 11 inner chamber lower end, by inside battery and outside channel enclosed.
When battery liquid-filling, as shown in Figure 4, poppet shaft 13 is pressed down under the effect of special liquid-injection equipment, back-moving spring 15 is compressed, poppet shaft 13 moves down together with interior sealing gasket 16, upper spring seat 17, external seal pad 18, pressure spring 19, lower spring cup 20, external seal pad 18 and valve body 11 lower end are separated and form gap, electrolyte enters inside battery from valve body 11 inner chamber through this passage, when fluid injection completes, poppet shaft 13 moves up under back-moving spring 15 acts on, and external seal pad 18 and valve body 11 inner chamber lower end seal and mutually by self-closed inside and outside battery.
In battery use procedure, when cell internal pressure acquires a certain degree, as shown in Figure 5, pressure spring 19 compression under the pressure of inside battery is done, interior sealing gasket 16 moves with in poppet shaft 13, make to form gap between upper spring seat 17 and interior sealing gasket 16, the gas of inside battery enters valve body 11 inner chamber from being provided with gas channel between upper spring seat 17 inner surface and poppet shaft 13 outer surface through this gap, discharge outside batteries thus reach the object of safety relief, when cell internal pressure reduces, pressure spring 19 resets and promotes lower spring cup 20, poppet shaft 13 just moves down compression upper spring seat with interior sealing gasket 16, again form sealing state.
Claims (2)
1. a lithium ion battery, comprise the cell cover (2) as anode, as battery container (3) and the takeup type battery core that is placed in battery container (3) of battery cathode, it is characterized in that: described cell cover (2) is arranged the bidirectional relief valve (1) that has fluid injection and explosion prevention function concurrently, described bidirectional relief valve (1) comprises valve body (11), bonnet (12), poppet shaft (13) and the spring sealed assembly be sleeved in poppet shaft (13), described bonnet (12) is for being fixedly installed in lithium ion battery upper cover (2) by described valve body (11), described valve body (11) outer ring suit sealing ring (14), described poppet shaft (13) is installed on described valve body (11) inner chamber, described poppet shaft (13) one end is stretched to inside battery cover from described valve body (11) bottom, the other end stretches out from described bonnet (12) top, described poppet shaft (13) can be up and down and will described valve body (11) and described bonnet (12) be made inside battery and the outside channel seal that communicates by described spring sealed assembly or open, described spring sealed assembly comprises back-moving spring (15), interior sealing gasket (16), upper spring seat (17), external seal pad (18), pressure spring (19), lower spring cup (20), described back-moving spring (15) is clipped between a shoulder of described poppet shaft (13) the upper limit shaft shoulder (131) and described valve body (11) inner chamber, described upper spring seat (17), the described poppet shaft (13) that is set in described pressure spring (19) and described lower spring cup (20) goes up and is in described valve body (11) bottom, gas channel is provided with between described upper spring seat (17) inner surface and described poppet shaft (13) outer surface, it is upper and suitable with described upper spring seat (17) inner surface top that described interior sealing gasket (16) fixed cover is loaded on described poppet shaft (13), described external seal pad (18) is fixedly set in described upper spring seat (17) outer surface of upper and suitable with described valve body (11) inner chamber lower end, the sealing contact surface of described interior sealing gasket (16) is the arc surface of revolution, described upper spring seat (17) inner surface top is the taper surface of revolution, described valve body (11) inner chamber lower end and described external seal pad (18) outer surface are the taper surface of revolution.
2. lithium ion battery according to claim 1, it is characterized in that: described battery core comprises positive plate (4), negative plate (5), barrier film (6), anode collection plate (7), negative pole currect collecting plate (8), after described positive plate (4) and described negative plate (5) separate winding shaping by described barrier film (6), top connects described anode collection plate (7), bottom connects described negative pole currect collecting plate (8), described anode collection plate (7) contacts with described cell cover (2), between described cell cover (2) and described battery container (3), insulating washer is provided with between described anode collection plate (7) and described battery container (3), described negative pole currect collecting plate (8) contacts with described battery container (3) inner bottom part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209136.XA CN102903866B (en) | 2011-07-25 | 2011-07-25 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209136.XA CN102903866B (en) | 2011-07-25 | 2011-07-25 | Lithium ion battery |
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| Publication Number | Publication Date |
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| CN102903866A CN102903866A (en) | 2013-01-30 |
| CN102903866B true CN102903866B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110209136.XA Active CN102903866B (en) | 2011-07-25 | 2011-07-25 | Lithium ion battery |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789518A (en) * | 2016-04-06 | 2016-07-20 | 河南环宇赛尔新能源科技有限公司 | Soft-package lithium ion battery with safety valve |
| CN109065943B (en) * | 2018-08-17 | 2024-04-02 | 深圳赛骄阳能源科技股份有限公司 | Explosion-proof lithium ion battery |
| CN109742267B (en) * | 2019-01-10 | 2022-07-19 | 深圳市量能科技有限公司 | Welding-free battery |
| CN113871765B (en) * | 2021-09-26 | 2024-02-23 | 贵阳比耐新能源科技有限公司 | Cylindrical battery and manufacturing method thereof |
| CN114261313B (en) * | 2021-12-10 | 2024-01-12 | 安徽瑞泰汽车零部件有限责任公司 | Water connection mechanism for quick-change battery box on electric automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4486284B2 (en) * | 2001-08-17 | 2010-06-23 | 三菱重工業株式会社 | Nonaqueous electrolyte secondary battery |
| CN201853748U (en) * | 2010-10-21 | 2011-06-01 | 赵宽 | Automatically voltage stabilized lithium titanate cathode lithium ion battery with rigid shell |
| CN202145480U (en) * | 2011-07-25 | 2012-02-15 | 周富华 | Lithium ion battery |
-
2011
- 2011-07-25 CN CN201110209136.XA patent/CN102903866B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4486284B2 (en) * | 2001-08-17 | 2010-06-23 | 三菱重工業株式会社 | Nonaqueous electrolyte secondary battery |
| CN201853748U (en) * | 2010-10-21 | 2011-06-01 | 赵宽 | Automatically voltage stabilized lithium titanate cathode lithium ion battery with rigid shell |
| CN202145480U (en) * | 2011-07-25 | 2012-02-15 | 周富华 | Lithium ion battery |
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| CN102903866A (en) | 2013-01-30 |
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