CN104375087A - Method for evaluating safety of power battery pack - Google Patents
Method for evaluating safety of power battery pack Download PDFInfo
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- CN104375087A CN104375087A CN201410490634.XA CN201410490634A CN104375087A CN 104375087 A CN104375087 A CN 104375087A CN 201410490634 A CN201410490634 A CN 201410490634A CN 104375087 A CN104375087 A CN 104375087A
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Abstract
A method for evaluating the safety of a power battery pack comprises the steps that 1, the damage degree of a battery pack accident is set; 2, generating frequency is set; 3, an R-Map of the safety of the battery pack is built. The safety and criticality safety (reasonable and feasible minimum margin area) of the charge and discharge process of the power battery pack are evaluated through the rate of temperature rising and the highest temperature parameter, therefore, it is guaranteed that the battery pack is high in safety for a long time, and the cost of consumers for replacing batteries is saved objectively.
Description
Technical field
The application relates to the evaluation method of electrokinetic cell security, belongs to electrokinetic cell detection technique field.
Background technology
The research and development of electric road vehicle (comprising electric automobile, battery-operated motor cycle etc.), is considered to one of the most real, the most effective approach of the crisis of current solution world energy sources and global environmental pollution.And be one of key components and parts of its development of restriction as the battery of electric road vehicle.
Electric road vehicle battery needs little for multiple capacity, that voltage is low cell to be combined into by parallel/serial mode the electric battery that capacity is high, voltage is high usually.But due to the consistance difference of each cell, electric battery performance after certain charge and discharge cycles has decline in various degree, show as cell consistance difference in the increasing of capacity attenuation rate and electric battery and become large, and in use the temperature variation of each cell and temperature rise rate different, more increase the inconsistency of each cell in electric battery, reduce the overall performance of electric battery, even can produce time serious that a series of potential safety hazard is such as exploded, leakage etc., affect the driving safety of electric vehicle.
At present, the conforming evaluation method of cell is: capacity difference, the AC internal Resistance of detection cell are poor, initial voltage difference carries out group gas-mixing screening, and somebody proposes the method for some observation battery charging and discharging curves to evaluate the feature of battery.
But said method does not all consider the change of battery in use temperature, therefore well cannot evaluate electric battery security in use.
Therefore, in order to better evaluate the security of the electric battery caused due to each cell inconsistency, the situation of change must developing a kind of temperature according to each cell and temperature rise rate evaluates the evaluation method of electric battery security, to realize fast, easily judging electric battery security and criticality safety, and take appropriate measures according to judged result, thus improve security and the serviceable life of electric battery.
Summary of the invention
For solving above technical matters, technical scheme of the present invention is as follows:
An evaluation method for power battery pack security, it comprises the extent of injury and the setting harm Frequency of setting electric battery.
Wherein, its step can be specially:
1, the extent of injury of electric battery accident is set
Under room temperature, setting electric battery occur because temperature is too high and/or the too fast accidents caused concrete extent of injury of temperature rise, be set as five degree from high to low by the order of severity: without wound, slight, critical, serious and fatal;
2, Frequency is set; Be set as six degree from high to low by Frequency: take place frequently, often occur, accidental, not easily occur, substantially can not and not consider;
3, the R-Map figure of electric battery security is set up
According to step 1 and step 2, repeatedly discharge and recharge is carried out to battery, in charge and discharge process, utilize thermocouple to obtain the temperature experiment data of battery, set up the R-Map figure of electric battery security in proper order; Acceptance level is divided into three Ge great districts in the figure, A district, B district and C district; Wherein,
A district represents unacceptable region, and namely electric battery should be stopped using immediately, and takes corresponding measure to reduce its risk, to improve its security; Wherein, the unacceptable degree of the unacceptable degree >A1 of the unacceptable degree >A2 of A3;
B district represents the bottom line district of reasonable, and it comprises B district B1, B2 and B3 tri-districts; Wherein, the bottom line district of the reasonable of the bottom line district <B1 of the reasonable of the bottom line district <B2 of the reasonable of B3;
C district represents safety zone, and namely electric battery is safe.
The invention has the advantages that: can evaluate the security in power battery pack charge and discharge process and criticality safety (the bottom line district of reasonable) according to the temperature rise rate of each cell and maximum temperature, and take appropriate measures according to judged result, its risk is reduced as much as possible when reasonable, thus in guarantee electric battery, there is higher security for a long time, improve the quality of Li-ion batteries piles, save the cost that consumer changes battery.
Embodiment:
Below in conjunction with specific experiment device, method step of the present invention is described
Test apparatus: comprehensive cell tester (MACCOR 3400) and data acquisition unit (model FLUKE2620).
Test specimen is: the electric battery including 96 pieces of cells, wherein each cell, rated voltage 3.7V, nominal capacity 10Ah; Physical dimension (long × wide × high) is: 133mm × 66mm × 18mm; The positive electrode active materials of battery is LiMn
2o
4, negative active core-shell material is graphite, and the principal ingredient of electrolytic solution is LiPF
6, EC (ethylene carbonate) and DMC (dimethyl carbonate), barrier film is celgard2325.
Experimental technique: under the experimental enviroment of 20 DEG C of scholars 2 DEG C, the battery to be detected of good for cloth temperature acquisition point is put in the plane (thermopair is arranged near positive pole), comprehensive cell tester is adopted to carry out 20 charge and discharge cycles to electric battery, within every 30 seconds, gather a temperature data, and calculate temperature rise rate.
The evaluation method step of electrokinetic cell security is as follows:
1, the setting of the extent of injury of electric battery accident
During room temperature, electric battery occurs because temperature is too high or the setting of the too fast accidents caused concrete extent of injury of temperature rise, as shown in table 1.
Table 1 extent of injury
2, the application of electric battery security R-Map figure
In 20 charge and discharge process, thermopair acquires 1689600 data altogether, wherein in electric battery each cell temperature rise rate and maximum temperature to exceed the situation of each threshold value as shown in table 2.
Table 2 experimental result
Frequency is as shown in table 3.
Table 3 Frequency
| The extent of injury | Frequency |
| 0 | 2.6×10 -1 |
| I | 4.0×10 -6 |
| II | 1.8×10 -6 |
| III | 1.5×10 -7 |
| IV | 0 |
According to above result, make electric battery security R-Map and scheme, as shown in table 4.
Table 4 electric battery security R-Map schemes
Known according to table 4, the Risk Results 2 of electric battery drops on B2 field, and 1 is dropped on B1 field, and namely this electric battery should reduce its risk as much as possible when reasonable, improves its security.
1) the present invention is based on the evaluation method that risk coordinate diagram (R-Map) method provides a kind of power battery pack security;
2) the method can judge the security of electric battery and criticality safety (the bottom line district of reasonable), and reduce its risk according to judged result as much as possible when reasonable, thus in guarantee electric battery, there is higher security for a long time.
3) the method is easy to universal.Can improve the quality of Li-ion batteries piles, the person of economizing in consumption changes the cost of battery, has certain economic implications and social effect
Although describe embodiments of the present invention in detail above, when not departing from spirit of the present invention or inner characteristic, the present invention can also embody by other form.Therefore, above description is only used to illustrate, instead of in order to limit.Protection scope of the present invention should be limited by the above description in claims instead of instructions.All equivalence transformations in claim implication all should fall within protection scope of the present invention.
Claims (2)
1. an evaluation method for power battery pack security, it comprises the extent of injury and the setting harm Frequency of setting electric battery.
2. the evaluation method of power battery pack security according to claim 1, its step can be specially:
1) extent of injury of electric battery accident, is set
Under room temperature, setting electric battery occur because temperature is too high and/or the too fast accidents caused concrete extent of injury of temperature rise, be set as five degree from high to low by the order of severity: without wound, slight, critical, serious and fatal;
2), Frequency is set; Be set as six degree from high to low by Frequency: take place frequently, often occur, accidental, not easily occur, substantially can not and not consider;
3) the R-Map figure of electric battery security, is set up
According to step 1) and step 2), repeatedly discharge and recharge is carried out to mesuring battary, in whole charge and discharge process, utilizes thermocouple to obtain the real time temperature experimental data of battery, set up the R-Map figure of electric battery security in proper order; Acceptance level is divided into three Ge great districts in the figure, A district, B district and C district; Wherein,
A district represents unacceptable region, and namely electric battery should be stopped using immediately, and takes corresponding measure to reduce its risk, to improve its security; Wherein, the unacceptable degree of the unacceptable degree >A1 of the unacceptable degree >A2 of A3;
B district represents the bottom line district of reasonable, and it comprises B district B1, B2 and B3 tri-districts; Wherein, the bottom line district of the reasonable of the bottom line district <B1 of the reasonable of the bottom line district <B2 of the reasonable of B3;
C district represents safety zone, and namely electric battery is safe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490634.XA CN104375087A (en) | 2014-09-23 | 2014-09-23 | Method for evaluating safety of power battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410490634.XA CN104375087A (en) | 2014-09-23 | 2014-09-23 | Method for evaluating safety of power battery pack |
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| CN104375087A true CN104375087A (en) | 2015-02-25 |
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| CN201410490634.XA Pending CN104375087A (en) | 2014-09-23 | 2014-09-23 | Method for evaluating safety of power battery pack |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192956A (en) * | 2017-05-19 | 2017-09-22 | 北京理工大学 | A kind of battery short circuit leakage on-line monitoring method and device |
| CN107917961A (en) * | 2017-09-21 | 2018-04-17 | 中国检验检疫科学研究院 | A kind of test method of in-service steel load-carrying construction part security |
| CN110308393A (en) * | 2018-03-21 | 2019-10-08 | 宝沃汽车（中国）有限公司 | Fault detection method, device, battery pack and vehicle |
| WO2020199416A1 (en) * | 2019-04-02 | 2020-10-08 | 清华大学 | Quantitative evaluation method and system for thermal runaway safety of power battery |
| CN113500012A (en) * | 2021-06-09 | 2021-10-15 | 同济大学 | Vehicle-mounted lithium ion power battery echelon utilization method based on cluster screening |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387689A (en) * | 2008-09-28 | 2009-03-18 | 广州丰江电池新技术有限公司 | Method for testing safety of lithium secondary battery by alkaline cell |
| US20090096459A1 (en) * | 2007-10-12 | 2009-04-16 | Fujitsu Limited | Method of measuring characteristics regarding safety of battery |
| US20120078549A1 (en) * | 2010-09-27 | 2012-03-29 | Hyundai Motor Company | Apparatus and method for estimating state of health of battery of vehicle |
| CN102447275A (en) * | 2010-10-11 | 2012-05-09 | 汽车零部件研究及发展中心有限公司 | Control system for accumulators |
-
2014
- 2014-09-23 CN CN201410490634.XA patent/CN104375087A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090096459A1 (en) * | 2007-10-12 | 2009-04-16 | Fujitsu Limited | Method of measuring characteristics regarding safety of battery |
| CN101387689A (en) * | 2008-09-28 | 2009-03-18 | 广州丰江电池新技术有限公司 | Method for testing safety of lithium secondary battery by alkaline cell |
| US20120078549A1 (en) * | 2010-09-27 | 2012-03-29 | Hyundai Motor Company | Apparatus and method for estimating state of health of battery of vehicle |
| CN102447275A (en) * | 2010-10-11 | 2012-05-09 | 汽车零部件研究及发展中心有限公司 | Control system for accumulators |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192956A (en) * | 2017-05-19 | 2017-09-22 | 北京理工大学 | A kind of battery short circuit leakage on-line monitoring method and device |
| CN107917961A (en) * | 2017-09-21 | 2018-04-17 | 中国检验检疫科学研究院 | A kind of test method of in-service steel load-carrying construction part security |
| CN110308393A (en) * | 2018-03-21 | 2019-10-08 | 宝沃汽车（中国）有限公司 | Fault detection method, device, battery pack and vehicle |
| WO2020199416A1 (en) * | 2019-04-02 | 2020-10-08 | 清华大学 | Quantitative evaluation method and system for thermal runaway safety of power battery |
| CN113500012A (en) * | 2021-06-09 | 2021-10-15 | 同济大学 | Vehicle-mounted lithium ion power battery echelon utilization method based on cluster screening |
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