CN107167264A - Electrokinetic cell multiplying power method for testing temperature rise - Google Patents
Electrokinetic cell multiplying power method for testing temperature rise Download PDFInfo
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- CN107167264A CN107167264A CN201611147499.4A CN201611147499A CN107167264A CN 107167264 A CN107167264 A CN 107167264A CN 201611147499 A CN201611147499 A CN 201611147499A CN 107167264 A CN107167264 A CN 107167264A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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Abstract
The invention discloses a kind of electrokinetic cell multiplying power method for testing temperature rise, comprise the following steps：Temperature sensing module is set in central battery to be measured；Centered on central battery, several are tested into battery-arrangements according to default aligning method；Charge/discharge, the multiplying power temperature rise value of test center's battery are carried out to central battery and test battery.Carry out heating process during simulated battery bag discharge and recharge present invention employs several test batteries arranged with default aligning method, so as to the temperature rise data of test center's battery, effective electrokinetic cell multiplying power temperature rise data can be provided for module, raising is precisely controlled ability to module temperature.
Description
Technical field
The present invention relates to the detection field of lithium ion battery, more particularly to a kind of electrokinetic cell multiplying power method for testing temperature rise.
Background technology
Lithium ion battery is a kind of thermally sensitive battery, and the change of temperature has larger shadow to performance of lithium ion battery
Ring, such as lithium ion battery heating causes battery own temperature to raise in charge and discharge process, and then causes under the performance of battery
Drop, influence is used.Existing lithium-ion-power cell is mainly used to do battery bag, is electric automobile, electric train, electrical salf-walking
Car, golf cart etc. provide power.Battery bag is numerous cells warp and tandem compound is formed, in charge and discharge process by
It is different with heat dispersal situations in the heat production of each cell, cause the presence of heat production inequality inside battery bag, radiating is uneven, and monomer
Between battery produce fuel factor influence, therefore in actual applications the heat production situation of battery bag be different from but cell heat production
Situation.But be all at present that the method that multiplying power temperature rise is individually tested using cell obtains temperature rise data on the market, to provide
To module.This is easy for causing battery bag internal temperature to monitor mistake, it is impossible to effective management and control battery bag, also reduces battery bag
Service efficiency.
The content of the invention
The present invention provides a kind of electrokinetic cell multiplying power method for testing temperature rise, and this method can effective simulated battery bag inner loop
Border is precisely controlled ability there is provided effective electrokinetic cell multiplying power temperature rise data, raising to module temperature.
The present invention provides a kind of electrokinetic cell multiplying power method for testing temperature rise, comprises the following steps：
Temperature sensing module is set in central battery to be measured；
Centered on central battery, several are tested into battery-arrangements according to default aligning method；
Charge/discharge, the multiplying power temperature rise value of test center's battery are carried out to central battery and test battery.
A kind of aligning method is：Several test batteries are at least surrounded into one layer of circle.
Further, aligning method is：Several test batteries surround three layers of circle.
Further, aligning method is：6 test batteries of first layer circular arrangement, 12 tests of second layer circular arrangement
Battery, 18 test batteries of third layer circular arrangement.
Further, the center of every layer of test battery is all in center circle, and the semidiameter of two center circles of adjacent layer is less than
21mm。
Another aligning method is：Several test batteries are at least surrounded into one-layer square.
Further, aligning method is：Several test batteries surround three layers it is square.
Further, aligning method is：4 test batteries of first layer square arrangement, 8 test electricity of second layer square arrangement
Pond, 12 test batteries of third layer square arrangement.
Further, the centre-to-centre spacing of every layer of adjacent test battery is less than 36mm, the immediate two tests battery of adjacent layer
Centre-to-centre spacing is less than 21mm.
Further, the making step of temperature sensing module includes:
Temperature sensing head is placed in central battery to be measured, then wrapped up with heat-insulating material, and on both positive and negative polarity respectively
Flow deflector is welded, outer layer is fastened with cleat insulator, then is wrapped up with heat-insulating material, obtains multiplying power temperature rise test module.
When carrying out simulated battery bag discharge and recharge present invention employs several test batteries arranged with default aligning method
Heating process so that the temperature rise data of test center's battery, can provide effective electrokinetic cell multiplying power temperature rise data for module,
Raising is precisely controlled ability to module temperature.
Brief description of the drawings
Fig. 1 is a kind of arrangement mode structural representation of embodiment of the present invention；
Fig. 2 is the arrangement mode structural representation of another embodiment of the present invention (not including detection module)；
Fig. 3 is the rate discharge test results schematic diagram for the battery bag and cell for using Fig. 1 arrangement modes；
Fig. 4 is the multiplying power discharging Capacity Ratio change schematic diagram for the battery bag and cell for using Fig. 1 arrangement modes.
Embodiment
The present invention provides a kind of electrokinetic cell multiplying power method for testing temperature rise, and this method includes：With a central battery to be measured
Centered on, it is arranged in using several test batteries according to default arrangement mode around central battery, with simulated battery group
Environment, to central battery carry out multiplying power charge/discharge temperature rise test.
The above method is comprised the following steps that：
S1, the setting temperature sensing module in central battery to be measured.
The making step of temperature sensing module is:Temperature sensing head is close to the middle part of central battery to be measured, then
Wrapped up with heat-insulating material, heat-insulating material can use aerogel blanket or glass fibre etc., and on the both positive and negative polarity of temperature sensing head respectively
Flow deflector is welded, the temperature sensing head for having welded flow deflector is fastened with cleat insulator, then is wrapped up with heat-insulating material, multiplying power is obtained
Temperature rise test module.In addition to temperature sensing head is used for sensing temperature, miscellaneous part should avoid overheat, therefore use heat insulating material
Material parcel temperature sensing module, prevents that battery heat release is to temperature sensing module heating in charge and discharge process, so as to influence temperature
The performance of detecting module.Thermal module can also be carried out after arrangement test battery.
S2, centered on central battery, according to default aligning method by several test battery-arrangements.Arrangement mode includes
Be arranged as pentagon, square or circle etc., centered on central battery, the number of plies of arrangement is at least one layer, such as one layer, two layers,
Three layers or four layers etc., every layer of test number of battery cells arranged can be adjusted according to the spacing between default test battery.Row
The purpose of row test battery is simulated battery group environment, therefore the mode of arrangement is not limited to above-mentioned arrangement mode.By what is arranged
Battery and central battery is tested to access in circuit in the form of in parallel.
S3, to central battery and test battery carry out charge/discharge, the multiplying power temperature rise value of test center's battery.When in test
During the multiplying power charging temperature rise in electrocardio pond, connecting circuit makes central battery and test battery be charged with default multiplying power, presets
Multiplying power such as 0.2C or 0.5C or 1C or 2C, observation temperature sensing head is detected in charging process temperature changing trend.When
During the multiplying power discharging temperature rise of test center's battery, circuit is connected first, central battery and test battery is entered with default multiplying power
Row charging, is charged to after rated value, then carries out being discharged to the temperature that temperature sensing head is detected in rated value, observation discharge process
Variation tendency.
Due to the method for testing using temperature value as measured value, therefore it should be ensured that temperature value is not by outer in test process
The interference of boundary's environment, realizes hot dynamic airtight.Such as central battery, test battery and temperature sensing module are arranged on using exhausted
, preferably can be using adiabatic accelerating calorimeter (ARC) in the cavity that hot material makes.
The present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one：
Fig. 1 is referred to, the specific method of testing of the present embodiment is as follows：
S11, the setting temperature sensing module in central battery to be measured.
The making step of temperature sensing module is:In the height that temperature sensing first 4 is close to central battery 5 to be measured
Portion, is then wrapped up with aerogel blanket (not shown), and flow deflector is respectively welded on the both positive and negative polarity of temperature sensing first 4 and (do not shown
Go out), the temperature sensing for having welded flow deflector first 4 is fastened with cleat insulator (not shown), then with aerogel blanket (not shown) bag
Wrap up in, obtain multiplying power temperature rise test module.
S12, centered on central battery 5, by several test batteries 2 carry out square arrangement.Specific arrangement mode includes：
Centered on central battery 5, several test batteries 2 are at least surrounded into one-layer square.In the present embodiment, test battery 2 encloses
It is square into three layers.4 test batteries 2 of first layer square arrangement, 8 test batteries 2 of second layer square arrangement, the square row of third layer
12 test batteries 2 of row.The same layer centre-to-centre spacing 1 of every layer of adjacent test battery 2 is less than 36mm, the immediate test battery of adjacent layer
2 adjacent bed centre-to-centre spacing 3 are less than 21mm.
The test battery 2 arranged and central battery 5 are accessed in circuit (not shown) in the form of in parallel.
S13, to central battery 5 carry out discharge-rate temperature rise test.It is first during the multiplying power discharging temperature rise of test center's battery 5
Circuit is first connected, central battery 5 and test battery 2 is charged to 4.2V under conditions of 25 DEG C with 0.5C, cut-off current is
0.01C, is discharged to 2.75V with 0.2C, 0.5C, 1C and 2C respectively.The temperature that temperature sensing first 4 is detected in observation discharge process
Variation tendency.
The present embodiment is tested using adiabatic accelerating calorimeter (ARC).
Embodiment two：
The present embodiment and the difference of embodiment one are step S13.In the present embodiment, central battery and test battery are entered
Row charging, the multiplying power temperature rise value of test center's battery.Connecting circuit makes central battery and test battery be carried out with default multiplying power
Charging, default multiplying power such as 0.2C, 0.5C, 1C and 2C, the observation temperature change that temperature sensing head is detected in charging process
Trend.
Embodiment three：
Fig. 2 is refer to, the specific method of testing of the present embodiment is as follows：
S21, the setting temperature sensing module in central battery to be measured.
The making step of temperature sensing module is:Temperature sensing head (not shown) is close to central battery 5 to be measured
The middle part of height, is then wrapped up, and welded respectively on the both positive and negative polarity of temperature sensing head (not shown) with aerogel blanket (not shown)
Flow deflector (not shown) is connect, the temperature sensing head (not shown) cleat insulator (not shown) for having welded flow deflector is fastened, then
Wrapped up with aerogel blanket (not shown), complete multiplying power temperature rise test module and make.
S22, centered on central battery 5, by several test batteries 2 carry out circular arrangement.Specifically arrangement mode is：With
Centered on central battery 5, several test batteries 2 are at least surrounded into one layer of circle.In the present embodiment, test battery 2 is surrounded
Three layers of circle, 6 test batteries of first layer circular arrangement, 2 second layer circular arrangements 12 test battery 2, third layer circular row
18 test batteries 2 of row.The center of every layer of test battery is all in center circle, and the semidiameter 6 of two center circles of adjacent layer is less than
21mm。
The test battery 2 arranged and central battery 5 are accessed in circuit in the form of in parallel.
S23, to central battery 5 carry out discharge-rate temperature rise test.It is first during the multiplying power discharging temperature rise of test center's battery 5
Circuit is first connected, central battery 5 and test battery 2 is charged to 4.2V under conditions of 25 DEG C with 0.5C, cut-off current is
0.01C, is discharged to 2.75V with 0.2C, 0.5C, 1C and 2C respectively.Temperature sensing head (not shown) in discharge process is observed to detect
The temperature changing trend arrived.
Example IV：
The present embodiment and the difference of embodiment three are step S23.In the present embodiment, central battery and test battery are entered
Row charging, the multiplying power temperature rise value of test center's battery.Connecting circuit makes central battery and test battery be carried out with default multiplying power
Charging, default multiplying power such as 0.2C, 0.5C, 1C or 2C, the observation temperature change that temperature sensing head is detected in charging process
Trend.
Wherein, the center line in the lines when solid line in Fig. 1 and Fig. 2 is arrangement for auxiliary, Fig. 2 is auxiliary observation
Lines, can not be indicated in actual alignment processes.
Comparative example
S31, temperature sensing module will be set with the cell of the same model of embodiment one.
The making step of temperature sensing module is:In the height that temperature sensing head is close to cell to be measured
Portion, is then wrapped up with aerogel blanket, and flow deflector is respectively welded on the both positive and negative polarity of temperature sensing head, will weld flow deflector
Temperature sensing head is fastened with cleat insulator, then is wrapped up with aerogel blanket, is completed multiplying power temperature rise test module and is made.
S32, by cell access circuit in.
S33, to cell carry out discharge-rate temperature rise test.During the multiplying power discharging temperature rise of test center's battery, first
Circuit is connected, central battery and test battery is charged to 4.2V under conditions of 25 DEG C with 0.5C, cut-off current is 0.01C,
2.75V is discharged to 0.2C, 0.5C, 1C and 2C respectively.The temperature change that temperature sensing head is detected in observation discharge process becomes
Gesture.
The present embodiment is tested using adiabatic accelerating calorimeter (ARC).
Fig. 3 is referred to, Fig. 3 shows the rate discharge test results schematic diagram of embodiment one and comparative example.Wherein, A1 tables
Show temperature rise change curve of the central battery in 2C multiplying power dischargings, A2 represents that central battery changes bent in the temperature rise of 1C multiplying power dischargings
Line, A3 represents temperature rise change curve of the central battery in 0.5C multiplying power dischargings, and A4 represents central battery in 0.2C multiplying power dischargings
Temperature rise change curve；B1 represents temperature rise change curve of the cell in 2C multiplying power dischargings, and B2 represents cell in 1C multiplying powers
The temperature rise change curve of electric discharge, B3 represents temperature rise change curve of the cell in 0.5C multiplying power dischargings, and B4 represents cell
In the temperature rise change curve of 0.2C multiplying power dischargings.
It can be seen that under identical discharge-rate, the central battery of embodiment one is than the cell of comparative example
Temperature rise of discharging is big.For example when discharge-rate is 2C, see curve A1, the temperature of the central battery of embodiment one is in 2500s
Rise above 60 degrees Celsius by 25 degrees Celsius of initial temperature, and the cell (such as curve B1) of comparative example in 2500s by
25 degrees Celsius of initial temperature rises to about 40 degrees Celsius, illustrates that the fuel factor between battery causes obvious shadow to central battery
Ring, the data obtained using cell test are simultaneously unreliable, and method of testing of the invention is due to simulated battery group real work
Environment, its obtained temperature rise data absolutely proves that this method can provide effective power closer to the actual temperature of module
Battery multiplying power temperature rise data, raising is precisely controlled ability to module temperature.
Fig. 4 shows the multiplying power discharging Capacity Ratio change schematic diagram of embodiment one and comparative example.C1 represents that central battery exists
The Capacity Ratio change broken line of 2C multiplying power dischargings, C2 represents that central battery changes broken line in the Capacity Ratio of 1C multiplying power dischargings, and C3 is represented
Central battery changes broken line in the Capacity Ratio of 0.5C multiplying power dischargings, and C4 represents that central battery becomes in the Capacity Ratio of 0.2C multiplying power dischargings
Change broken line；D1 represents that cell changes broken line in the Capacity Ratio of 2C multiplying power dischargings, and D2 represents cell in 1C multiplying power dischargings
Capacity Ratio change broken line, D3 represents that cell changes broken line in the Capacity Ratio of 0.5C multiplying power dischargings, and D4 represents cell
Change broken line in the Capacity Ratio of 0.2C multiplying power dischargings.Find out in figure, C1 is essentially coincided with D1, C2 is essentially coincided with D2, C3 with
D3 is essentially coincided, and C4 is essentially coincided with D4, illustrates that both are identical in the discharging efficiency of identical test condition, thus exclude because
The situation of discharging efficiency Different Effects temperature rise data, it was demonstrated that the reliability of this method of testing is high.
Similarly, rate of charge can also be tested with same method, characterize the temperature rise situation of module internal.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the protection of the present invention should be all considered as belonging to
Scope.
Claims (10)
1. a kind of electrokinetic cell multiplying power method for testing temperature rise, it is characterised in that comprise the following steps：
Temperature sensing module is set in central battery to be measured；
Centered on the central battery, several are tested into battery-arrangements according to default aligning method；
Charge/discharge is carried out to the central battery and the test battery, the multiplying power temperature rise value of the central battery is tested.
2. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 1, it is characterised in that the aligning method is：Will
Several described test batteries at least surround one layer of circle.
3. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 2, it is characterised in that the aligning method is：If
The dry test battery surrounds three layers of circle.
4. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 3, it is characterised in that the aligning method is：The
One layer of test battery of circular arrangement 6, the test battery of second layer circular arrangement 12, third layer circular arrangement 18
The test battery.
5. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 4, it is characterised in that every layer of test battery
Center is all in center circle, and the semidiameter of two center circles of adjacent layer is less than 21mm.
6. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 1, it is characterised in that the aligning method is：Will
Several described test batteries at least surround one-layer square.
7. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 6, it is characterised in that the aligning method is：If
The dry test battery surround three layers it is square.
8. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 7, it is characterised in that the aligning method is：The
One-layer square arranges 4 test batteries, the test battery of second layer square arrangement 8, third layer square arrangement 12
The test battery.
9. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 8, it is characterised in that every layer of adjacent test electricity
The centre-to-centre spacing in pond is less than 36mm, and immediate two of the adjacent layer test battery center is away from less than 21mm.
10. electrokinetic cell multiplying power method for testing temperature rise as claimed in claim 1, it is characterised in that the temperature sensing module
Making step include:
Temperature sensing head is placed in central battery to be measured, and wrapped up with heat-insulating material, and be respectively welded and lead on both positive and negative polarity
Flow, the temperature sensing head for welding the flow deflector is fastened with cleat insulator, then is wrapped up with heat-insulating material, obtains multiplying power
Temperature rise test module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611147499.4A CN107167264A (en) | 2016-12-13 | 2016-12-13 | Electrokinetic cell multiplying power method for testing temperature rise |
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| CN201611147499.4A CN107167264A (en) | 2016-12-13 | 2016-12-13 | Electrokinetic cell multiplying power method for testing temperature rise |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805073A (en) * | 2021-09-17 | 2021-12-17 | 合肥国轩高科动力能源有限公司 | Method for evaluating maximum temperature rise of lithium battery system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3798217B2 (en) * | 2000-03-30 | 2006-07-19 | Ｔｄｋ株式会社 | Secondary battery protection circuit |
| US8575897B2 (en) * | 2008-10-03 | 2013-11-05 | Denso Corporation | Battery temperature control system |
| CN203415662U (en) * | 2013-06-25 | 2014-01-29 | 天津力神电池股份有限公司 | Square lithium ion battery pack with fixed temperature measuring structures |
| CN103760496A (en) * | 2014-01-28 | 2014-04-30 | 安徽安凯汽车股份有限公司 | Charge and discharge capacity testing device and method for power battery pack of electric vehicle |
| CN103994833A (en) * | 2014-05-29 | 2014-08-20 | 奇瑞汽车股份有限公司 | Arrangement structure of electric vehicle power battery temperature sensors |
-
2016
- 2016-12-13 CN CN201611147499.4A patent/CN107167264A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3798217B2 (en) * | 2000-03-30 | 2006-07-19 | Ｔｄｋ株式会社 | Secondary battery protection circuit |
| US8575897B2 (en) * | 2008-10-03 | 2013-11-05 | Denso Corporation | Battery temperature control system |
| CN203415662U (en) * | 2013-06-25 | 2014-01-29 | 天津力神电池股份有限公司 | Square lithium ion battery pack with fixed temperature measuring structures |
| CN103760496A (en) * | 2014-01-28 | 2014-04-30 | 安徽安凯汽车股份有限公司 | Charge and discharge capacity testing device and method for power battery pack of electric vehicle |
| CN103994833A (en) * | 2014-05-29 | 2014-08-20 | 奇瑞汽车股份有限公司 | Arrangement structure of electric vehicle power battery temperature sensors |
Non-Patent Citations (1)
| Title |
|---|
| 胡小峰: "电动汽车锂离子电池组无机超导热管散热性能研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805073A (en) * | 2021-09-17 | 2021-12-17 | 合肥国轩高科动力能源有限公司 | Method for evaluating maximum temperature rise of lithium battery system |
| CN113805073B (en) * | 2021-09-17 | 2023-11-03 | 合肥国轩高科动力能源有限公司 | Maximum temperature rise assessment method for lithium battery system |
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Application publication date: 20170915 |