CN102694214A - Measuring method for temperature of lithium-ion battery - Google Patents
Measuring method for temperature of lithium-ion battery Download PDFInfo
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- CN102694214A CN102694214A CN2012101587004A CN201210158700A CN102694214A CN 102694214 A CN102694214 A CN 102694214A CN 2012101587004 A CN2012101587004 A CN 2012101587004A CN 201210158700 A CN201210158700 A CN 201210158700A CN 102694214 A CN102694214 A CN 102694214A
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Abstract
The purpose of the invention is to provide a convenient and accurate measuring method for temperature of a lithium-ion battery. The measuring method specifically comprises the following steps: packaging a temperature sensor probe inside a battery in a manufacturing process of the lithium-ion battery, and guiding a guide wire of the temperature sensor probe out of the battery; and connecting a temperature collecting element with the temperature sensor in a charging and discharging process of the battery, so as to realize measurement on real-time temperature inside the battery. With the adoption of the measuring method for the temperature of the lithium-ion battery, the temperature sensor probe is packaged in the battery, so that the temperature information inside the battery can be directly acquired; compared with a method for measuring the surface temperature of the battery, the measured temperature is more accurate; and by observing temperature distribution and temperature change of each point inside the lithium-ion battery in the charging and discharging process, a research personnel can judge a part with excessive current density, so that the process and structural design of the lithium-ion battery can be timely optimized, and internal high-temperature hidden danger is eliminated, thereby the safety of the lithium-ion battery is improved.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly, relate to a kind of method of measurement of lithium ion battery temperature.
Background technology
Compare with batteries such as lead-acid battery, Ni-MH batteries; Lithium ion battery have specific energy height, operating voltage high, have extended cycle life, plurality of advantages such as environmentally friendly; And along with the development of lithium ion battery technology of preparing and technology, the rising of demand; Its price also is decline trend year by year, is slowly accepted by consumers in general.In recent years, lithium ion battery has obtained in fields such as mobile phone, notebook computer, space equipment, electric bicycle and electric automobiles using widely, and its development advances swiftly unhindered, and shows boundless application prospect.
But the safety problem of lithium ion battery does not still solve fully at present, and this problem becomes the bottleneck of its mass production.Lithium ion battery since when discharging and recharging internal current density inconsistent; Temperature distributing disproportionation; Will make the organic electrolyte decomposition and produce a large amount of gases if local temperature is too high, inner pressure of battery sharply rising can cause battery explosion, so the inside lithium ion cell temperature must be effectively controlled.Traditional measurement lithium ion battery method of temperature is to measure the battery surface temperature; The temperature that records like this can not accurate response goes out the actual state of inside battery; Not enough science and rigorous; Can't make lithium ion battery have certain danger for the control of inside lithium ion cell temperature provides information accurately.
Summary of the invention
The objective of the invention is to propose a kind of convenience, the method for measurement of lithium ion battery temperature accurately; So that people grasp the Temperature Distribution of inside lithium ion cell; In time optimize lithium-ion electric pool process and structural design, eliminate internal high temperature hidden danger, and then improve the fail safe of lithium ion battery.
The key of the method for measurement of lithium ion battery temperature of the present invention is: prepare in the process at lithium ion battery, temperature sensor probe is packaged in inside battery, and the lead of temperature sensor probe is drawn battery; In battery charge and discharge process, the temperature acquisition element is linked to each other with said temperature sensor, can realize the measurement of inside battery real time temperature.
The present invention is packaged in inside battery with temperature sensor probe, can directly get access to the temperature information of inside battery, and than measuring the battery surface method of temperature, measured temperature is more accurate.
Specifically, battery pole piece is range upon range of or temperature sensor probe is positioned between battery pole piece and the barrier film when reeling carrying out, and then carries out encapsulate, encapsulation, fluid injection, processes lithium ion battery, helps like this guaranteeing that the position of temperature sensor probe is accurate.
The lead of said temperature sensor probe is drawn through the through hole of being located at the cell cover place, and said through hole utilizes scolding tin or rubber resin to seal after lead is drawn.The structure at cell cover place is comparatively firm, offers through hole herein to draw lead, can avoid the overall structure stability of battery is caused excessive influence.
Further, said temperature sensor probe and lead all adopt polyethylene or polyacrylic film wrapped, to avoid electrolyte temperature sensor probe and lead are caused corrosion.
Further, said temperature sensor probe has five at least, and is distributed in central authorities and four edges of lithium ion battery, can utilize minimum temperature sensor probe to know the Temperature Distribution of inside lithium ion cell like this.
Further, said temperature sensor probe is an occasionally thermal resistance of thermoelectricity, and structure is small and exquisite, is convenient to arrange.
Further, the thickness≤0.2mm of said temperature sensor probe is to avoid that the performance of battery itself is caused excessive influence.
The present invention can directly get access to the temperature information of inside battery through temperature sensor probe is packaged in inside battery, than measuring the battery surface method of temperature; Measured temperature is more accurate; The Temperature Distribution and the variations in temperature of inner each point were judged the too high position of current density when the research staff can discharge and recharge through the observation lithium ion battery, in time optimized lithium-ion electric pool process and structural design; Eliminate internal high temperature hidden danger, thereby improve the fail safe of lithium ion battery.
Description of drawings
Fig. 1 is the placement location of temperature sensor probe among the present invention.
Fig. 2 is the extraction location of temperature sensor lead among the present invention.
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are done further to specify.
Embodiment 1:
Like Fig. 1, shown in 2; With stacked square box hat 40Ah lithium ion battery is example; Present embodiment is in the cell preparation process; 5 micro thermocouples probes of being processed by copper constantan 1 are positioned over middle position and four edges of inside lithium ion cell, and the lead 2 of temperature sensor probe is drawn battery; Lead 2 with thermocouple in battery charge and discharge process links to each other with the temperature acquisition element, can measure the real time temperature of each point, and concrete steps are following:
A: the micro thermocouple of selecting copper constantan to process, and utilize polyacrylic film with thermocouple probe 1 and lead 2 parcels thereof;
B: in the lithium ion battery lamination process; Place the inside lithium ion cell bosom just between (or negative) pole piece 5 and the barrier film 5 micro thermocouples probe 1; Particular location is middle position and four edges of inside battery; After thermocouple probe 1 placed, the careful operation lithium ion battery lamination was in case 1 position of popping one's head in changes;
C: in the battery pack process of assembling, bore a through hole 4 that is slightly larger than thermocouple wire 2 diameters, utilize through hole 4 that the lead 2 of micro thermocouple is drawn, utilize electric iron scolding tin then with through hole 4 sealings at cell cover 3 places;
D: fluid injection, accomplish the preparation of lithium ion battery;
E: lithium ion battery change into or test process in, the lead 2 of thermocouple is connected with the temperature acquisition element, can monitor the Temperature Distribution and the situation of change of inside lithium ion cell each point in real time.
Thickness≤the 0.2mm of temperature sensor probe 1 is to avoid that the performance of battery itself is caused excessive influence.
Claims (7)
1. the method for measurement of a lithium ion battery temperature is characterized in that preparing in the process at lithium ion battery, temperature sensor probe is packaged in inside battery, and the lead of temperature sensor probe is drawn battery; In battery charge and discharge process, the temperature acquisition element is linked to each other with said temperature sensor, can realize the measurement of inside battery real time temperature.
2. the method for measurement of lithium ion battery temperature according to claim 1; It is characterized in that in that to carry out battery pole piece range upon range of or temperature sensor probe is positioned between battery pole piece and the barrier film when reeling; And then carry out encapsulate, encapsulation, fluid injection, process lithium ion battery.
3. the method for measurement of lithium ion battery temperature according to claim 2 is characterized in that the lead of said temperature sensor probe is drawn through the through hole of being located at the cell cover place, and said through hole utilizes scolding tin or rubber resin to seal after lead is drawn.
4. according to the method for measurement of claim 1 or 2 or 3 described lithium ion battery temperature, it is characterized in that said temperature sensor probe and lead all adopt polyethylene or polyacrylic film wrapped.
5. according to the method for measurement of claim 1 or 2 or 3 described lithium ion battery temperature, it is characterized in that said temperature sensor probe has five at least, and be distributed in central authorities and four edges of lithium ion battery.
6. according to the method for measurement of claim 1 or 2 or 3 described lithium ion battery temperature, it is characterized in that said temperature sensor probe is an occasionally thermal resistance of thermoelectricity.
7. according to the method for measurement of claim 1 or 2 or 3 described lithium ion battery temperature, it is characterized in that the thickness≤0.2mm of said temperature sensor probe.
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| CN2012101587004A CN102694214A (en) | 2012-05-22 | 2012-05-22 | Measuring method for temperature of lithium-ion battery |
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| CN2012101587004A CN102694214A (en) | 2012-05-22 | 2012-05-22 | Measuring method for temperature of lithium-ion battery |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900733A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Method for measuring temperature field distribution inside battery |
| CN104880261A (en) * | 2015-06-05 | 2015-09-02 | 淄博火炬能源有限责任公司 | Method for detecting internal temperature of square laminated lithium ion battery |
| CN104900932A (en) * | 2015-04-23 | 2015-09-09 | 四川长虹电源有限责任公司 | Novel lithium-ion storage battery |
| CN105509922A (en) * | 2015-11-26 | 2016-04-20 | 东莞市振华新能源科技有限公司 | A kind of test method of closed cell temperature of battery diaphragm |
| CN106768567A (en) * | 2017-03-20 | 2017-05-31 | 吉林大学 | The detection means and measuring method of lithium ion battery internal stress |
| CN106802395A (en) * | 2017-02-21 | 2017-06-06 | 山东玉皇新能源科技有限公司 | A kind of inside lithium ion cell battery heat test device |
| CN108511832A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN108511833A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN108886179A (en) * | 2017-01-03 | 2018-11-23 | 株式会社Lg化学 | A battery cell capable of measuring the internal temperature of the battery cell |
| CN109065961A (en) * | 2018-08-09 | 2018-12-21 | 北京理工大学 | A kind of production method that multipoint mode internal temperature monitors integrated electrochemical cell |
| WO2019179031A1 (en) * | 2018-03-23 | 2019-09-26 | Chongqing Jinkang New Energy Vehicle Co., Ltd. | Battery cells for battery packs in electric vehicles |
| CN111384460A (en) * | 2018-12-29 | 2020-07-07 | 中信国安盟固利动力科技有限公司 | Multi-parameter integrated device of ion battery and preparation method thereof |
| CN111628210A (en) * | 2020-04-22 | 2020-09-04 | 北京航空航天大学 | Lithium ion battery supporting in-situ measurement of internal temperature of battery and manufacturing method |
| CN113193306A (en) * | 2021-03-25 | 2021-07-30 | 北京理工大学 | Diaphragm with temperature sensing function |
| CN117607691A (en) * | 2023-10-09 | 2024-02-27 | 广东恒翼能科技股份有限公司 | Tracking detection method and device for charging working temperature of lithium ion battery |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900733A (en) * | 2014-03-04 | 2014-07-02 | 清华大学 | Method for measuring temperature field distribution inside battery |
| CN104900932A (en) * | 2015-04-23 | 2015-09-09 | 四川长虹电源有限责任公司 | Novel lithium-ion storage battery |
| CN104880261A (en) * | 2015-06-05 | 2015-09-02 | 淄博火炬能源有限责任公司 | Method for detecting internal temperature of square laminated lithium ion battery |
| CN105509922A (en) * | 2015-11-26 | 2016-04-20 | 东莞市振华新能源科技有限公司 | A kind of test method of closed cell temperature of battery diaphragm |
| CN108886179A (en) * | 2017-01-03 | 2018-11-23 | 株式会社Lg化学 | A battery cell capable of measuring the internal temperature of the battery cell |
| CN106802395A (en) * | 2017-02-21 | 2017-06-06 | 山东玉皇新能源科技有限公司 | A kind of inside lithium ion cell battery heat test device |
| CN108511832A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN108511833A (en) * | 2017-02-27 | 2018-09-07 | 湖南妙盛汽车电源有限公司 | A kind of lithium battery |
| CN106768567A (en) * | 2017-03-20 | 2017-05-31 | 吉林大学 | The detection means and measuring method of lithium ion battery internal stress |
| WO2019179031A1 (en) * | 2018-03-23 | 2019-09-26 | Chongqing Jinkang New Energy Vehicle Co., Ltd. | Battery cells for battery packs in electric vehicles |
| CN109065961A (en) * | 2018-08-09 | 2018-12-21 | 北京理工大学 | A kind of production method that multipoint mode internal temperature monitors integrated electrochemical cell |
| CN109065961B (en) * | 2018-08-09 | 2020-07-24 | 北京理工大学 | A manufacturing method of a multi-point internal temperature monitoring integrated battery |
| CN111384460A (en) * | 2018-12-29 | 2020-07-07 | 中信国安盟固利动力科技有限公司 | Multi-parameter integrated device of ion battery and preparation method thereof |
| CN111628210A (en) * | 2020-04-22 | 2020-09-04 | 北京航空航天大学 | Lithium ion battery supporting in-situ measurement of internal temperature of battery and manufacturing method |
| CN113193306A (en) * | 2021-03-25 | 2021-07-30 | 北京理工大学 | Diaphragm with temperature sensing function |
| CN117607691A (en) * | 2023-10-09 | 2024-02-27 | 广东恒翼能科技股份有限公司 | Tracking detection method and device for charging working temperature of lithium ion battery |
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Application publication date: 20120926 |