CN202633427U - Self-protection device for square lithium ion secondary battery - Google Patents
Self-protection device for square lithium ion secondary battery Download PDFInfo
- Publication number
- CN202633427U CN202633427U CN2012200374364U CN201220037436U CN202633427U CN 202633427 U CN202633427 U CN 202633427U CN 2012200374364 U CN2012200374364 U CN 2012200374364U CN 201220037436 U CN201220037436 U CN 201220037436U CN 202633427 U CN202633427 U CN 202633427U
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- China
- Prior art keywords
- lithium ion
- pole
- ion secondary
- secondary battery
- thermistor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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 utility model discloses a self-protection device for a square lithium ion secondary battery, which comprises the square lithium ion secondary battery, the square lithium ion secondary battery comprises a battery body and a cover board, an anodal pole, an anodal tab, a cathodal pole and a cathodal tab are arranged between the battery body and the cover board, and a thermistor is soldered at the joint between the anodal pole and the anodal tab or the joint between the cathodal pole and the cathodal tab. The design of the self-protection device is simple, the self-protection device is easy to put into practice, the cost is low, and under an accident, the self-protection device can guarantee the safety of the battery and a battery pack.
Description
Technical field
The utility model relates to the lithium battery structure technical field, is specifically related to a kind of self-protecting device of square lithium ion secondary battery.
Background technology
Thermistor is a type of senser, and its typical feature is exactly to responsive to temperature, shows different resistance values under the different temperatures.Can be divided into positive temperature coefficient resistor (PTC) and negative temperature coefficient resister (NTC) according to the temperature coefficient difference, semistor resistance value when temperature is high more is high more, and its resistance can increase to thousands of times of initial condition.Under normal temperature condition, the resistance of PTC is lower, allows electric current to pass through, but under abnormal conditions, under the situation that electric current sharply increases or temperature raises, thereby the resistance of PTC will increase electric current is reduced or prevent overheated.Utilize this characteristics of thermistor, can the unlikely overcurrent of guard block or overheated.
Between the both positive and negative polarity pole of lithium ion battery, between the both positive and negative polarity lug, all be the position that is easier to be short-circuited, after short circuit takes place; Be prone to cause battery flatulence, leakage, smolder or even on fire from explosion; Produce danger, thus thermistor can be installed herein, when short circuit causes temperature or current anomaly; Thermistor will increase resistance automatically and prevent overcurrent or overheated, the protection battery; Lithium ion battery is in charge and discharge process; Inside battery is persistently overheating; Very easily raise under abnormal conditions if discharge and recharge overlong time or surpass the temperature that normally discharges and recharges interval, especially lug and pole junction, the possibility of causing danger is bigger; So, also can thermistor be installed herein and protect battery.In becoming Battery pack, thermistor has been installed especially, wherein a battery takes place can not impact other adjacent cell unusually.
The utility model content
The technical problem that the utility model will solve provides a kind of can the protection the abnormal conditions that electrokinetic cell is short-circuited and other can cause internal temperature sharply to rise under abnormal operating state; In time cut off the battery abnormal current; And temperature is reduced; Thereby avoid phenomenons such as battery high-temperature after-explosion, also can avoid in the Battery pack, wherein the self-protecting device of battery result's of taking place unusually other adjacent cell are impacted square lithium ion secondary battery.
The scheme of the technical problem that the utility model solves is:
The self-protecting device of square lithium ion secondary battery; Include square lithium ion secondary battery; Described square lithium ion secondary battery includes battery body, cover plate; Be provided with Positive Poles, positive pole ear, negative pole pole, negative lug between said battery body and the cover plate, it is characterized in that: the junction of the junction of said Positive Poles and positive pole ear or negative pole pole and negative lug is equipped with a thermistor.
The self-protecting device of described square lithium ion secondary battery is characterized in that: said thermistor becomes the film-type form through the cutting processing processes, is shaped as square, circular, oval or other shapes; The two ends of thermistor are respectively equipped with an exit, and two exits are welded in the junction of Positive Poles and positive pole ear or the junction of negative pole pole and negative lug through a thermistor weld tabs respectively.
The self-protecting device of described square lithium ion secondary battery is characterized in that: the welding manner between said thermistor and pole, the lug is electric resistance welding, ultrasonic bond, soldering, soldering or riveted joint.
The self-protecting device of described square lithium ion secondary battery is characterized in that: described thermistor is a semistor, and material is a semiconductor, and the scope of resistance value is 0.1～100k Ω.
The operation principle of the utility model is: at inside lithium ion cell; Position with high temperature is prone to be short-circuited; Thermistor is installed; Do not influence under the condition of battery sizes outward appearance, battery temperature rise or internal current increase situation unusually under, the rapid increase through the thermistor internal resistance reduces inputing or outputing of electric current; Realization is being short-circuited under the abnormal operating state and other cause internal temperature of battery sharply to carry out gentle overcurrent protection under the abnormal conditions of risings to electrokinetic cell, thereby makes and drop to minimum to the influence of adjacent cell afterwards in groups.
Compare with the battery that does not add temperature-sensitive resistance safeties, the beneficial effect of the utility model is: the utility model design is succinct, is prone to realize that cost is low, under unexpected situation, guarantees the fail safe of battery and battery pack.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the profile of the thermistor welding portion of the utility model.
Embodiment
Like Fig. 1, shown in 2; The self-protecting device of square lithium ion secondary battery; Include square lithium ion secondary battery; Square lithium ion secondary battery includes battery body 2, cover plate 1, is provided with Positive Poles 6, positive pole ear 7, negative pole pole 3, negative lug 4 between battery body 2 and the cover plate 1, and Positive Poles 6 is equipped with a thermistor 5 with the junction of positive pole ear 7 or the junction of negative pole pole 3 and negative lug 4.
Thermistor 5 becomes the film-type form through the cutting processing processes, is shaped as square, circular, oval or other shapes; The two ends of thermistor 5 are respectively equipped with an exit 5-1,5-2, and two exit 5-1,5-2 are welded in Positive Poles 6 and the junction of positive pole ear 7 or the junction of negative pole pole 3 and negative lug 4 through a thermistor weld tabs 8,9 respectively.
Welding manner between thermistor 5 and pole, the lug is electric resistance welding, ultrasonic bond, soldering, soldering or riveted joint.
Thermistor 5 is a semistor, and material is a semiconductor, and the scope of resistance value is 0.1～100k Ω.
Thermistor 5 is packaged together with cover plate 1 and battery body 2, forms rectangular cell internal security device.
Claims (4)
1. the self-protecting device of a square lithium ion secondary battery; Include square lithium ion secondary battery; Described square lithium ion secondary battery includes battery body, cover plate; Be provided with Positive Poles, positive pole ear, negative pole pole, negative lug between said battery body and the cover plate, it is characterized in that: the junction of the junction of said Positive Poles and positive pole ear or negative pole pole and negative lug is equipped with a thermistor.
2. the self-protecting device of square lithium ion secondary battery according to claim 1, it is characterized in that: said thermistor becomes the film-type form through the cutting processing processes, is shaped as square, circular or oval; The two ends of thermistor are respectively equipped with an exit, and two exits are welded in the junction of Positive Poles and positive pole ear or the junction of negative pole pole and negative lug through a thermistor weld tabs respectively.
3. the self-protecting device of square lithium ion secondary battery according to claim 1 and 2, it is characterized in that: the welding manner between said thermistor and pole, the lug is electric resistance welding, ultrasonic bond, soldering, soldering or riveted joint.
4. the self-protecting device of square lithium ion secondary battery according to claim 1, it is characterized in that: described thermistor is a semistor, and material is a semiconductor, and the scope of resistance value is 0.1～100k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200374364U CN202633427U (en) | 2012-02-06 | 2012-02-06 | Self-protection device for square lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200374364U CN202633427U (en) | 2012-02-06 | 2012-02-06 | Self-protection device for square lithium ion secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633427U true CN202633427U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200374364U Expired - Lifetime CN202633427U (en) | 2012-02-06 | 2012-02-06 | Self-protection device for square lithium ion secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202633427U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054202A1 (en) * | 2016-09-22 | 2018-03-29 | 深圳拓邦新能源技术有限公司 | Battery cover plate and battery |
| CN109950642A (en) * | 2017-12-21 | 2019-06-28 | 宁德新能源科技有限公司 | A kind of battery core and battery |
| CN110071255A (en) * | 2018-01-23 | 2019-07-30 | 宁德新能源科技有限公司 | Battery core and battery |
| CN112736279A (en) * | 2021-01-12 | 2021-04-30 | 广东维都利新能源有限公司 | Button cell with safety device and manufacturing method thereof |
-
2012
- 2012-02-06 CN CN2012200374364U patent/CN202633427U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054202A1 (en) * | 2016-09-22 | 2018-03-29 | 深圳拓邦新能源技术有限公司 | Battery cover plate and battery |
| CN109950642A (en) * | 2017-12-21 | 2019-06-28 | 宁德新能源科技有限公司 | A kind of battery core and battery |
| CN110071255A (en) * | 2018-01-23 | 2019-07-30 | 宁德新能源科技有限公司 | Battery core and battery |
| CN112736279A (en) * | 2021-01-12 | 2021-04-30 | 广东维都利新能源有限公司 | Button cell with safety device and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. Free format text: FORMER NAME: HEFEI GUOXUAN HIGH-TECH POWER ENERGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Patentee after: Hefei Guoxuan High-Tech Power Energy Co., Ltd. Address before: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Patentee after: Hefei Guoxuan High-Tech Power Energy Co., Ltd. Address before: 230000 Yaohai Industrial Park, Anhui, Hefei No. D weft Road, No. 7 Patentee before: Hefei Guoxuan High-Tech Power Energy Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |
|
| CX01 | Expiry of patent term |