CN2809894Y - Battery for safety device with mounting temperature control - Google Patents
Battery for safety device with mounting temperature control Download PDFInfo
- Publication number
- CN2809894Y CN2809894Y CN200420120521.2U CN200420120521U CN2809894Y CN 2809894 Y CN2809894 Y CN 2809894Y CN 200420120521 U CN200420120521 U CN 200420120521U CN 2809894 Y CN2809894 Y CN 2809894Y
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- China
- Prior art keywords
- battery
- safety device
- temperature control
- temperature
- control safety
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- Expired - Lifetime
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- Secondary Cells (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to a battery for safety devices with mounting temperature control. A cover plate or a shell body of the battery for safety devices with mounting temperature control is provided with a through hole. A safety device of temperature control is inlaid in the through hole, and can be a layer of low temperature fusible alloy material as well as two layers. An upper layer is middle and low temperature fusible alloy material which is solidified on copper or aluminum or a stainless steel wire mesh or foil material on a lower layer. The material of the safety device of temperature control of the battery for safety devices with mounting temperature control adopts middle and low temperature fusible alloy which comprise one kind or a plurality of kinds in Ga, In, Sn, Bi, Pb, Cd and Zn. When the temperature of a battery main body achieves the temperature of a melting point of the alloy, the fusible material is fused. The safety device is ruptured for discharging the internal pressure of the battery for safety devices with mounting temperature control to exert the purpose of realizing and ensuring the safety of the utility model. The battery for safety devices with mounting temperature control of the utility model can be an electrochemical battery of Li-ion, Ni-MH, Ni-Cd, etc., with the advantages of simple and convenient fabrication and low cost.
Description
Technical field
The utility model belongs to the explosion protection for batteries applied technical field, particularly a kind of battery that temperature control safety device is installed.
Background technology
In recent years, high power capacity, high specific energy, high-specific-power battery obtain significant progress.Especially with the alkali metal oxide of lithium (as LiCoO
2, LiMn
2O
4, LiNiO
2Deng) be anodal, and be that the lithium ion battery with nonaqueous electrolyte of negative pole begins to be widely used in various portable electronics and is applied to electric vehicle with material with carbon element or alloy material.And the fail safe of battery also gets more and more people's extensive concerning, and the safety issue that solves battery chases after at the eyebrows and eyelashes.
The safety device that adopts on present most of battery all is operation controlled condition with pressure; promptly at battery case or cover indentation or be installed on the battery to make pressure burst fragmentation form; overcharge when battery is in, when causing cell internal pressure too high under the abuse conditions such as short circuit, bump, the distortion of pressure-type safety device, cracking and play the effect of protection cell safety.The safety device of this form can play the effect of certain protection battery; simple and easy to do; but its shortcoming is owing to be subjected to the influence of material therefor and condition elements such as processing intensity, precision, tolerance; pressure error sometimes can be up to ± 40%; therefore be difficult to control and guarantee stablizing and consistency of battery pressure release value, coefficient of safety can't guarantee.
Summary of the invention
The purpose of this utility model provides a kind of battery that temperature control safety device is installed, and is the condition element that adopts temperature to have an effect as the control safety device, can accurately control the temperature of safety device cracking, and is simple for production, convenient easy-to-use.
For achieving the above object, the utility model is taked following technical scheme:
A kind of battery that temperature control safety device is installed has through hole, and inlay temperature control safety device in through hole on the cover plate of battery or housing.
In the utility model, described temperature control safety device is a Lipowitz's alloy material in one deck.
In the utility model, described temperature control safety device is two-layer, is Lipowitz's alloy material during the upper strata is, Lipowitz's alloy material cured is on lower floor's copper, aluminium, stainless steel metal silk screen or foil in this.
In the utility model, described temperature control safety device is to be embedded in the through hole of the cover plate of battery or housing with mechanical connection, riveted joint or welding manner.
In the utility model, the composition of described middle Lipowitz's alloy comprises one or more among Ga, In, Sn, Bi, Pb, Cd and the Zn.
In the utility model, described battery temperature control safety device be shaped as square shape sheet, disc or profiled piece.
In the utility model, described battery container is that fine aluminium, aluminium alloy or stainless steel are made.
In the utility model, the composition of described alloy and weight proportion are according to the temperature of control safety device cracking and definite.
In the utility model, the temperature range of described control safety device cracking is 50～200 ℃.
The temperature control type safety device that the utility model proposed is mentioned a kind of with the new approaches of temperature as safety device pressure release controlled condition, can accurate and effective control safety device Cracking Temperature guaranteeing the fail safe of battery, the stability of temperature can be controlled in ± 2 ℃.
The method that temperature control safety device is installed on battery of the present utility model comprises the steps:
(1), according to the battery rule that battery temperature rises under abuse conditions, and according to the used battery temperature and the relational expression of internal pressure, set the temperature of control safety device cracking, to make the middle Lipowitz's alloy of corresponding fusing point, determine the composition and the weight proportion of this alloy again according to the fusing point that will make alloy, its composition comprises one or more among Ga, In, Sn, Bi, Pb, Cd and the Zn.
(2), the alloy of step (1) being made adopts the method for pressure processing or casting to make battery and controls safety device with temperature.
(3), on the housing of battery or cover plate, make a call to earlier a hole, then battery is embedded in this hole with temperature control safety device, promptly make the battery that battery temperature is controlled safety device be installed.
On battery, install in the method for temperature control safety device, in the method for the casting in described step (2), after being the alloy melting that step (1) is made, pour in the mould, shelve woven wire or foils such as copper, aluminium, stainless steel in the mould in advance, so that alloy material is solidificated on woven wire or the foil.Like this, alloy material supports as relying on woven wire such as copper, aluminium, stainless steel or foil.
The battery of the installation temperature control safety device that the utility model proposed, be to mention a kind of technical scheme of using temperature as safety device pressure release controlled condition, can accurate and effective control safety device Cracking Temperature guaranteeing the fail safe of battery, the stability of temperature can be controlled in ± 2 ℃.When the battery body temperature arrives the melting temperature of alloy, the fusible material fusing, safety device breaks and releases cell internal pressure, plays the purpose that realizes guaranteeing cell safety.
The utility model has the advantages that:
1. safety device adopts fusible metal to make, but the break temperature of accurate and effective control safety device guarantees consistent, stable, reliability;
2. can obtain required different temperature points by the allotment alloy composition, melting temperature can accurately be controlled, and is flexible;
Not controlled by the battery profile, can be made into difformity to satisfy the requirement of battery.
Description of drawings
Fig. 1 is the structural representation of battery temperature control safety device of the present utility model
Fig. 2 is the structural representation of the battery of installation battery temperature control safety device of the present utility model
Fig. 3 is for overcharging battery container temperature changing curve diagram in the test
Embodiment
Battery temperature of the present utility model is controlled safety device as shown in Figure 1, and middle Lipowitz's alloy 1 is solidificated on copper, aluminium, stainless steel metal silk screen or the foil 2.
The battery of installation battery temperature control safety device of the present utility model as shown in Figure 2, on the housing of battery 3 or cover plate, make a call to earlier a hole, then battery temperature is controlled safety device 4 and be embedded in this hole, promptly make the battery that battery temperature control safety device is installed.
Install on battery in the method for temperature control safety device, the temperature and the installation site of safety device cracking generally can be determined according to the actual temperature of battery in the cell safety test.For example, a kind of battery is carried out safety test, can obtain the temperature changing curve diagram of cell safety test shown in Figure 3.Fig. 3 overcharges battery container temperature variation curve in the test, and as can be seen, the battery container temperature reaches as high as 95 ℃, so can determine the temperature of cell safety device according to the experiment of reality.Then, according to the temperature of determining the cell safety device, utilize the composition of temperature and alloy and weight proportion to allocate according to the fusing point of heterogeneity.Concrete allotment is as described in the following embodiment.
Can select the temperature spot of an assurance safety to make the alloy of corresponding fusing point according to the battery rule that battery temperature rises under abuse conditions.
Adopt LiCoO
2For anodal, carbosphere are that negative pole is made lithium ion battery.According to the structure of this battery, if battery battery temperature under abuse conditions can raise, when surpassing 58 ℃ ± 2 ℃, the internal pressure of battery can too high generation danger.According to this regularity, the temperature of setting control safety device cracking is 58 ℃, making the middle Lipowitz's alloy of corresponding 58 ℃ of fusing points, and determines the composition and the percentage by weight of this alloy according to the fusing point that will make alloy.Its composition and percentage by weight are as follows: Bi 49%, and In 21%, and Pb 18%, Sn12%.
Be to pour in the mould behind 58 ℃ the alloy melting above-mentioned fusing point, can shelve stainless steel cloth in the mould in advance and also can alloy be made the disk shape form safety device, then it is set on the battery cover, can use without supporting body as supporting body.
Adopt LiCoO
2For anodal, carbosphere are that negative pole is made lithium ion battery, adopting above-mentioned fusing point is 58 ℃ the made disk shape safety device of alloy, it is loaded in the through hole that battery cover accomplishes fluently in advance battery capacity 30Ah in the riveted joint mode.Battery is carried out destructive testing, battery is charged to 4.2V with the 30A electric current, the steel nail with Φ 3mm-Φ 8mm runs through (steel nail rests on the storage battery) rapidly from the direction perpendicular to accumulator plate then.When battery temperature rose to the safety device fusion temperature melting temperature of alloy (be 58 ℃), the internal pressure of battery was released in the safety device fusing, but battery does not explode, not on fire.
Alloy melting point is 108 ℃;
The composition and the percentage by weight of alloy are as follows: In 52%, Sn46%, Zn2%.
In destructive testing, when battery temperature rose to the safety device fusion temperature melting temperature of alloy (be 108 ℃), the internal pressure of battery was released in the safety device fusing, but battery does not explode, not on fire.
Embodiment 3
Embodiment 3 is different from the embodiment 1 except that the composition and the percentage by weight of alloy melting point, alloy, and remaining is all identical with embodiment 1.
Alloy melting point is 142 ℃;
The composition and the percentage by weight of alloy are as follows: In 98%, and Zn 2%.
In destructive testing, when battery temperature rose to the safety device fusion temperature melting temperature of alloy (be 142 ℃), the internal pressure of battery was released in the safety device fusing, but battery does not explode, not on fire.
In the utility model, the temperature range of control safety device cracking is 50～200 ℃, and the alloy of all the other temperature beyond the embodiment 1,2,3 all can carry out corresponding allotment according to the alloy composition that the utility model proposes, and does not give unnecessary details one by one.Therefore, embodiment 1,2,3 is three examples just, do not limit the utility model.
Battery temperature control safety device of the present utility model can be suitable for electrochemical cells such as Li-ion, Ni-MH, Ni-Cd to be used, simple for production, with low cost.
Claims (6)
1, a kind of battery that temperature control safety device is installed is characterized in that: have through hole on the cover plate of battery or housing, and inlay temperature control safety device in through hole.
2, the battery of installation temperature control safety device according to claim 1 is characterized in that: described temperature control safety device is a Lipowitz's alloy material in one deck.
3, the battery of installation temperature control safety device according to claim 1, it is characterized in that: described temperature control safety device is two-layer, be Lipowitz's alloy material during the upper strata is, Lipowitz's alloy material cured is on lower floor's copper, aluminium, stainless steel metal silk screen or foil in this.
4, according to the battery of claim 2 or 3 described installation temperature control safety devices, it is characterized in that: the composition of Lipowitz's alloy comprises one or more among Ga, In, Sn, Bi, Pb, Cd and the Zn in described.
5, the battery of installation temperature according to claim 4 control safety device is characterized in that: described battery temperature control safety device be shaped as square shape sheet, disc or profiled piece.
6, the battery of installation battery temperature control safety device according to claim 1, it is characterized in that: described battery container is that fine aluminium, aluminium alloy or stainless steel are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420120521.2U CN2809894Y (en) | 2004-12-28 | 2004-12-28 | Battery for safety device with mounting temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420120521.2U CN2809894Y (en) | 2004-12-28 | 2004-12-28 | Battery for safety device with mounting temperature control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2809894Y true CN2809894Y (en) | 2006-08-23 |
Family
ID=36926078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200420120521.2U Expired - Lifetime CN2809894Y (en) | 2004-12-28 | 2004-12-28 | Battery for safety device with mounting temperature control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2809894Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470431A (en) * | 2014-09-12 | 2016-04-06 | 宁德时代新能源科技股份有限公司 | Battery and explosion-proof device thereof |
| CN107293656A (en) * | 2017-07-13 | 2017-10-24 | 深圳市科达利实业股份有限公司 | A kind of battery cover plate structure and battery that can be vented at high temperature |
| CN111916584A (en) * | 2020-07-02 | 2020-11-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
-
2004
- 2004-12-28 CN CN200420120521.2U patent/CN2809894Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470431A (en) * | 2014-09-12 | 2016-04-06 | 宁德时代新能源科技股份有限公司 | Battery and explosion-proof device thereof |
| CN107293656A (en) * | 2017-07-13 | 2017-10-24 | 深圳市科达利实业股份有限公司 | A kind of battery cover plate structure and battery that can be vented at high temperature |
| CN111916584A (en) * | 2020-07-02 | 2020-11-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
| CN111916584B (en) * | 2020-07-02 | 2022-06-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141228 Granted publication date: 20060823 |