CN102208581A - Pressure-releasing device, lithium ion cell and electric vehicle - Google Patents
Pressure-releasing device, lithium ion cell and electric vehicle Download PDFInfo
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- CN102208581A CN102208581A CN2010101384246A CN201010138424A CN102208581A CN 102208581 A CN102208581 A CN 102208581A CN 2010101384246 A CN2010101384246 A CN 2010101384246A CN 201010138424 A CN201010138424 A CN 201010138424A CN 102208581 A CN102208581 A CN 102208581A
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- hole
- inner chamber
- pressure
- pressure relief
- relief device
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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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Abstract
The invention discloses a pressure-releasing device used for sealing an air outlet of a cell, comprising a first housing with an inner chamber, an elasticity mechanism and a seal mechanism for sealing the air outlet of the cell. The seal mechanism and the elasticity mechanism are arranged inside the inner chamber; the elasticity mechanism is disposed over the seal mechanism; one end of the elasticity mechanism is connected with the seal mechanism and the other end of the elasticity mechanism is connected with the inner chamber; and the first housing is provided with at least one second through hole which communicates the inner chamber and the outside environment, thus communicating the air outlet of the cell and the second through hole(s) when the pressure on the seal mechanism is larger than a preset pressure. The invention also discloses a lithium ion cell which is equipped with the above pressure-releasing device and an electric vehicle which is equipped with the lithium ion cell. The pressure-releasing device provided by the invention can not only release pressure for cells but also effectively decrease the temperature in cells to eliminate cell thermal runaway; and the pressure-releasing device has advantages of simple structure and low cost.
Description
Technical field
The present invention relates to a kind of lithium ion battery, relate in particular to a kind of pressure relief device, lithium ion battery and electric automobile.
Background technology
Along with oil supply in the world wide is day by day nervous, price skyrockets and the pressure of environmental protection, reduces the energy resource consumption of fossil class, reduces the carbon dioxide discharging, becomes one of the problem of urgent solution of the present whole mankind.World many countries is competitively developed the green energy resource technology, and it is with the fastest developing speed wherein especially to be applied as the power lithium-ion battery field of representative with electric automobile.Power lithium-ion battery since have in light weight, volume is little, the life-span is long, voltage is high, good cycle and characteristics such as pollution-free are subjected to market and extensively favor.
Though comparing with other power source, power lithium-ion battery has above-mentioned advantage, but because power lithium-ion battery energy height, and electrolyte mostly is organic combustibles etc. greatly, when producing speed, the battery heat under adverse circumstances, overcharges greater than radiating rate or battery, when abuse such as short circuit and misuse, the inside battery material decomposes, reaction, battery temperature can rise rapidly, carrying out inside battery and can produce a large amount of gas simultaneously along with chemical reaction, when internal gas and battery temperature acquired a certain degree, smoldering appearred in battery, catch fire even security incidents such as blast and even injury to personnel.
Summary of the invention
The main technical problem to be solved in the present invention is, a kind of pressure relief device simple in structure and safe in utilization is provided, has the lithium ion battery of this pressure relief device and has the electric automobile of this lithium ion battery.
For solving the problems of the technologies described above, the invention provides a kind of pressure relief device, be used for the sealed cell venthole, comprise: first shell with inner chamber, the sealing mechanism of elastic mechanism and sealed cell venthole, described sealing mechanism and described elastic mechanism are arranged in the described inner chamber, described elastic mechanism is arranged on the top of described sealing mechanism, described elastic mechanism one end connects described sealing mechanism, the other end connects described inner chamber, described first shell is provided with at least one and is communicated with described inner chamber and the second extraneous through hole, when making the pressure that is subjected to when sealing mechanism greater than preset pressure, the battery venthole is communicated with described second through hole.
Described inner chamber has goes to the bottom, and described going to the bottom is provided with first through hole that is communicated with battery venthole and described inner chamber, and described sealing mechanism is arranged on described the going to the bottom, and seals described first through hole.
Described sealing mechanism comprises sealing ring and the top flat that is arranged on the described sealing ring, and described elastic mechanism is a spring.
Described upper base has the third through-hole that is communicated with the described inner chamber and the external world.
Be provided with governor motion in the described third through-hole, described governor motion is a screw, and described screw is provided with fourth hole and external screw thread, and described fourth hole is communicated with the described inner chamber and the external world, described third through-hole has internal thread, described external screw thread and described screw-internal thread fit.
Described fourth hole is processed with interior hexagon handle hole.
A kind of lithium ion battery comprises cell cover plate and above-mentioned pressure relief device, and described cell cover plate is provided with the battery venthole, and described pressure relief device is arranged on the described battery venthole.
A kind of electric automobile with above-mentioned lithium ion battery.
The invention has the beneficial effects as follows:
In an embodiment of the present invention, when the pressure that a large amount of gas produced of inside battery generation reaches the force value of pressure relief device setting, sealing mechanism is by jack-up, gas enters first shell inner cavity from the battery inner chamber via the battery venthole, discharge by second through hole on first shell again, pressure relief device resets after gas is discharged, and sealing device is the sealed cell venthole once more.The present invention can carry out pressure release to battery, and the temperature that also can effectively reduce inside battery is to eliminate the battery thermal runaway; The present invention is simple in structure, and with low cost.
Description of drawings
Fig. 1 is the pressure relief device in the specific embodiment of the invention and the schematic perspective view of cell cover plate;
Fig. 2 is the decomposing schematic representation of the pressure relief device in the specific embodiment of the invention;
Fig. 3 is the structural representation of the shell in the specific embodiment of the invention;
Fig. 4 is the structural representation of the screw in the specific embodiment of the invention;
Fig. 5 is the cutaway view of the pressure relief device in the specific embodiment of the invention.
Embodiment
In conjunction with the accompanying drawings the present invention is described in further detail below by embodiment.
To shown in Figure 5, the lithium ion battery with pressure relief device of the present invention comprises cell cover plate 21, pressure relief device 10, positive terminal 23, negative terminal 22, inner core (figure does not show) and battery container (figure does not show) as Fig. 1.Positive terminal 23 and negative terminal 22 are arranged on the cell cover plate, and cell cover plate 21 is arranged on the battery container, and inner core is arranged in the battery container, also are provided with battery venthole (figure does not show) and liquid injection hole 24 on the cell cover plate 21.
Pressure relief device comprises first shell 11, sealing mechanism and elastic mechanism 14.First shell 11 has inner chamber 16, sealing mechanism and elastic mechanism 14 are successively set in the inner chamber 16 from the bottom to top, sealing mechanism sealed cell venthole (figure does not show), elastic mechanism 14 1 ends connect sealing mechanism, the other end connects inner chamber 16, first shell 11 is provided with at least one second through hole 111, second through hole 111 is opened on the sidewall of first shell 11, second through hole, 111 communication with cavity 16 and the external world, gas in the inner chamber 16 is communicated with extraneous gas, when making the pressure that is subjected to when sealing mechanism greater than preset pressure, sealing mechanism is backed down, and the battery venthole is communicated with second through hole 111.
The position of second through hole, 111 in the vertical directions is higher than sealing mechanism.Second through hole 111 can have one, also can have a plurality of.In one embodiment, second through hole 111 has four, and is evenly distributed on the sidewall of first shell 11.Specifically can on average have second through hole 111 of 4 Φ 2.0mm according to periphery in the distance shell 11 6.0mm position of going to the bottom, its position also can be determined according to the requirement of pressure and exhaust.
Inner chamber 16 has goes to the bottom, and goes to the bottom to be provided with first through hole, 114, the first through holes, 114 connection battery venthole and inner chambers 16, on sealing mechanism is arranged on and goes to the bottom, and seals first through hole 114.
Sealing mechanism can comprise sealing ring 12 and top flat 13, and sealing ring 12 can circular O shape seal gasket, and its section footpath size range is Φ 2.0～Φ 2.5mm.The size of sealing ring 12 also can be determined according to actual conditions, as long as can the sealed cell venthole.Top flat 13 is arranged on the sealing ring 12, and top flat 13 is cylindrical, adopts stainless steel to make.
Inner chamber 16 also can have upper base, can offer third through-hole 115 at upper base, third through-hole 115 communication with cavity 16 and the external world.
Can be provided with governor motion in the third through-hole 115, be used to regulate the pretightning force of elastic mechanism 14.In one embodiment, this governor motion is a screw 15, and screw 15 has fourth hole 152 and external screw thread 151, fourth hole 152 communication with cavity 16 and the external world, and third through-hole 115 has internal thread 112, and described external screw thread 151 cooperates with internal thread 112.
A kind of electric automobile with above-mentioned lithium ion battery, this lithium ion battery is used to produce power, drives the power train of automobile.
The assembling process of pressure relief device of the present invention is as follows: at first with the parallel shell of putting into of circular O shape seal gasket, shell is provided with internal thread, be placed on the circular O shape seal gasket cylindrical stainless steel top flat is parallel again, then stainless steel spring is placed on the cylindrical stainless steel top flat, afterwards, the interior hexagonal flush end tightening screw that will be processed with outer Luo line again carries out the Luo line with the shell that has internal thread and is connected, and the upper surface of hexagonal flush end tightening screw is concordant with the upper surface of shell in making.After pressure relief device assembles, it is welded on the lithium ion battery upper cover plate by the laser welding mode.
In an embodiment of the present invention, pressure relief device comprises sealing mechanism and the elastic mechanism that is arranged in the shell inner cavity, sealing mechanism sealed cell venthole, elastic mechanism one end connects sealing mechanism, the other end connects inner chamber, when a large amount of gases of inside battery generation make its pressure be increased to the force value of default pressure relief device, sealing device is by gas jack-up, gas enters the inner chamber of first shell through the battery venthole and first through hole from the battery inner chamber, discharge by second through hole on first shell again, pressure relief device resets after gas is discharged, and sealing device is the sealed cell venthole once more.The present invention is except that can carrying out the pressure release battery, and the temperature that also can effectively reduce inside battery is to eliminate the battery thermal runaway; The present invention is simple in structure, and with low cost.Among the present invention, inner chamber has goes to the bottom, and going to the bottom is provided with first through hole, and sealing mechanism is convenient to fitting operation on being arranged on and going to the bottom.Among the present invention, sealing mechanism is made up of sealing ring and top flat, and elastic mechanism is spring, and is simple in structure, has reduced cost once more.Among the present invention, the upper base of shell is provided with third through-hole, can accelerate to discharge the speed of gas, and battery is pulled through rapidly.Among the present invention, third through-hole is built-in with screw, and screw has external screw thread, and third through-hole has internal thread, and external screw thread and screw-internal thread fit make the pretightning force of screw adjustable springs.Screw has fourth hole, and four-way is processed with interior hexagon handle hole, conveniently adjusted initial tension of spring.
The present invention both can be used for the rectangular lithium ion electrokinetic cell, also can be used for circle and waited on other shape lithium-ion-power cell.This pressure relief device promptly can be used on the lithium-ion-power cell of metal shell simultaneously, also can be used for the power lithium-ion battery of other material shells such as plastic cement.
Above content be in conjunction with concrete execution mode to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. pressure relief device, be used for the sealed cell venthole, it is characterized in that, comprise: first shell with inner chamber, the sealing mechanism of elastic mechanism and sealed cell venthole, described sealing mechanism and described elastic mechanism are arranged in the described inner chamber, described elastic mechanism is arranged on the top of described sealing mechanism, described elastic mechanism one end connects described sealing mechanism, the other end connects described inner chamber, described first shell is provided with at least one and is communicated with described inner chamber and the second extraneous through hole, when making the pressure that is subjected to when sealing mechanism greater than preset pressure, the battery venthole is communicated with described second through hole.
2. pressure relief device as claimed in claim 1 is characterized in that, described inner chamber has goes to the bottom, and described going to the bottom is provided with first through hole that is communicated with battery venthole and described inner chamber, and described sealing mechanism is arranged on described the going to the bottom, and seals described first through hole.
3. pressure relief device as claimed in claim 1 is characterized in that, described sealing mechanism comprises sealing ring and the top flat that is arranged on the described sealing ring, and described elastic mechanism is a spring.
4. pressure relief device as claimed in claim 1 is characterized in that described inner chamber has upper base, and described upper base has the third through-hole that is communicated with the described inner chamber and the external world.
5. pressure relief device as claimed in claim 4, it is characterized in that, be provided with governor motion in the described third through-hole, described governor motion is a screw, described screw is provided with fourth hole and external screw thread, described fourth hole is communicated with the described inner chamber and the external world, and described third through-hole has internal thread, described external screw thread and described screw-internal thread fit.
6. pressure relief device as claimed in claim 5 is characterized in that, described fourth hole is processed with interior hexagon handle hole.
7. a lithium ion battery is characterized in that, comprises the cell cover plate and as the described pressure relief device of claim 1 to 6, described cell cover plate is provided with the battery venthole, and described pressure relief device is arranged on the described battery venthole.
8. electric automobile with lithium ion battery as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101384246A CN102208581A (en) | 2010-03-30 | 2010-03-30 | Pressure-releasing device, lithium ion cell and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101384246A CN102208581A (en) | 2010-03-30 | 2010-03-30 | Pressure-releasing device, lithium ion cell and electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN102208581A true CN102208581A (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101384246A Pending CN102208581A (en) | 2010-03-30 | 2010-03-30 | Pressure-releasing device, lithium ion cell and electric vehicle |
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| CN (1) | CN102208581A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403471A (en) * | 2011-11-18 | 2012-04-04 | 合肥国轩高科动力能源有限公司 | Method for manufacturing cover plate of lithium-ion battery |
| CN102569694A (en) * | 2011-12-28 | 2012-07-11 | 刘立文 | Anti-explosion device for storage battery convey car |
| 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 |
| CN110048051A (en) * | 2019-04-26 | 2019-07-23 | 浙江悦达塑业股份有限公司 | The accumulator housing of combined and spliced formula |
| CN113363616A (en) * | 2021-06-17 | 2021-09-07 | 中国第一汽车股份有限公司 | Pressure-adjustable liquid cooling plate, power battery assembly and vehicle |
| CN114725610A (en) * | 2022-06-06 | 2022-07-08 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, battery and power consumption device |
| WO2022246840A1 (en) * | 2021-05-28 | 2022-12-01 | 宁德时代新能源科技股份有限公司 | End cap assembly, battery cell, battery and electrical device |
Citations (4)
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| CN2457746Y (en) * | 2000-12-13 | 2001-10-31 | 天津和平海湾电源集团有限公司 | Square metal shell sealed acoumulator |
| CN1450683A (en) * | 2003-05-07 | 2003-10-22 | 锺馨稼 | Repeatedly rechargeable/dischargeable high-voltage lithium ion battery |
| CN201084789Y (en) * | 2007-07-24 | 2008-07-09 | 雷天电池技术有限公司 | A high-voltage dynamic lithium ion chargeable battery |
| CN201252136Y (en) * | 2008-09-17 | 2009-06-03 | 天空能源(洛阳)有限公司 | Lithium battery with safety valve |
-
2010
- 2010-03-30 CN CN2010101384246A patent/CN102208581A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457746Y (en) * | 2000-12-13 | 2001-10-31 | 天津和平海湾电源集团有限公司 | Square metal shell sealed acoumulator |
| CN1450683A (en) * | 2003-05-07 | 2003-10-22 | 锺馨稼 | Repeatedly rechargeable/dischargeable high-voltage lithium ion battery |
| CN201084789Y (en) * | 2007-07-24 | 2008-07-09 | 雷天电池技术有限公司 | A high-voltage dynamic lithium ion chargeable battery |
| CN201252136Y (en) * | 2008-09-17 | 2009-06-03 | 天空能源(洛阳)有限公司 | Lithium battery with safety valve |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403471A (en) * | 2011-11-18 | 2012-04-04 | 合肥国轩高科动力能源有限公司 | Method for manufacturing cover plate of lithium-ion battery |
| CN102569694A (en) * | 2011-12-28 | 2012-07-11 | 刘立文 | Anti-explosion device for storage battery convey car |
| 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 |
| CN110048051A (en) * | 2019-04-26 | 2019-07-23 | 浙江悦达塑业股份有限公司 | The accumulator housing of combined and spliced formula |
| WO2022246840A1 (en) * | 2021-05-28 | 2022-12-01 | 宁德时代新能源科技股份有限公司 | End cap assembly, battery cell, battery and electrical device |
| CN113363616A (en) * | 2021-06-17 | 2021-09-07 | 中国第一汽车股份有限公司 | Pressure-adjustable liquid cooling plate, power battery assembly and vehicle |
| CN113363616B (en) * | 2021-06-17 | 2022-05-20 | 中国第一汽车股份有限公司 | Pressure-adjustable liquid cooling plate, power battery assembly and vehicle |
| CN114725610A (en) * | 2022-06-06 | 2022-07-08 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, battery and power consumption device |
| CN114725610B (en) * | 2022-06-06 | 2024-04-02 | 江苏时代新能源科技有限公司 | End cover assembly, battery cell, battery and power utilization device |
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