CN107290669A - A kind of diagnostic method of retired power battery box of electric vehicle - Google Patents
A kind of diagnostic method of retired power battery box of electric vehicle Download PDFInfo
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- CN107290669A CN107290669A CN201610204451.6A CN201610204451A CN107290669A CN 107290669 A CN107290669 A CN 107290669A CN 201610204451 A CN201610204451 A CN 201610204451A CN 107290669 A CN107290669 A CN 107290669A
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- battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a kind of diagnostic method of retired power battery box of electric vehicle, methods described comprises the following steps：(1) outward appearance of battery case is checked；(2) open-circuit voltage of battery case is detected；(3) insulating properties of battery case is detected；(4) DC internal resistance of the detection battery case under pulse；(5) precision and environmental suitability of the battery management system of detection battery case；(6) the charge and discharge electro-detection of battery case.The present invention to battery case by directly being detected, being improved detection efficiency of the retired electrokinetic cell during secondary utilization；Secondary utilization is directly carried out to retired power battery box, so as to improve the economy that retired electric automobile power battery echelon is utilized, reduction echelon utilizes the operating cost of battery energy storage system.
Description
Technical field
The present invention relates to a kind of diagnostic method of battery case, and in particular to a kind of retired electric automobile power battery
The diagnostic method of case.
Background technology
With the fast development and application of electric automobile, the scale of electric automobile power battery also increasingly expands,
Electric automobile is higher to the performance requirement of electrokinetic cell.In order to ensure in the power performance of electric automobile, driving
Security performance in journey and running, when the stability of electrokinetic cell declines or electrokinetic cell capacity attenuation
To rated capacity 70-80% when, just must change electrokinetic cell.The retired electrokinetic cell of electric automobile have compared with
High residual capacity, detects these retired electrokinetic cells, and the performance condition for understanding electrokinetic cell is visual feelings
Condition is applied to the occasion relatively low to battery performance requirements, realizes that the echelon of electrokinetic cell is utilized.
With electrokinetic cell of the groups of form on the electric automobile of connecting it is retired from electric automobile when be also
It is retired in the way of battery case.It is by battery to the detection and analysis of retired electric automobile power battery at present
Case is disassembled as battery cell, the detection and analysis then carried out for battery cell.Although this method can be very
The good performance state for detecting retired electric automobile power battery, but battery case is disassembled, detect
After completion, also screening combo is carried out to battery again, such a disassembly process generally takes more than ten days even
It could complete within tens days, add the secondary financial cost utilized of retired electrokinetic cell, be unfavorable for retired power
The secondary development utilized of battery.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of quick battery case diagnostic method, save retired dynamic
The secondary time cost utilized of power battery and financial cost.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of diagnostic method of retired power battery box of electric vehicle, methods described comprises the following steps：
(1) outward appearance of battery case is checked；
(2) open-circuit voltage of battery case is detected；
(3) insulating properties of battery case is detected；
(4) DC internal resistance of the detection battery case under pulse；
(5) precision and environmental suitability of the battery management system of detection battery case；
(6) the charge and discharge electro-detection of battery case.
The step (1) includes checking whether there is box deformation, connector loosening, voltage and temperature data
Gathering line loosens, it is damaged or come off, lug fracture, battery case leakage and battery case management system are damaged or pine
It is dynamic.
The step (2) includes：The open-circuit voltage of battery case series-connected cell is measured with universal meter, and determines to be somebody's turn to do
Whether battery is fail battery.
The resistance that the step (3) is included between total positive pole or total negative pole and the earth according to battery case determines institute
Whether state battery case is the battery case leaked electricity.
In the step (4), the detection method of DC internal resistance of the battery case under pulse includes：
At 23 ± 2 DEG C, the both positive and negative polarity of charge-discharge test instrument is connected with the total negative pole of total positive pole of battery case respectively,
Both positive and negative polarity of the both positive and negative polarity of voltage acquisition line respectively with battery case series-connected cell is connected；
When carrying out 30s pulsed discharge to battery case with 1C-2C multiplying powers, internal resistance R is calculated as follows：
R=(V2-V1)/I
In formula：I is the direct-current discharge electric current of series-connected cell, and V1 and V2 are respectively series-connected cell in battery case
The voltage at the end of voltage and electric discharge before electric discharge；
And determine whether the battery is fail battery according to the R values of calculating.
The step (5) includes：
The both positive and negative polarity of charge-discharge test instrument is connected with the total negative pole of total positive pole of battery case respectively, voltage acquisition line
Both positive and negative polarity of the both positive and negative polarity respectively with battery case series-connected cell be connected；The battery management system is provided with temperature
Sensor and pressure measuring instrument；
At for 20 DEG C and -20 DEG C, discharge and recharge is carried out to battery case with 1/3C multiplying powers and 1/5C multiplying powers respectively,
In real time collection battery management system voltage and temperature, and according to the battery management system gather voltage with
The deviation of the temperature and actual temperature of the numerical bias of virtual voltage and battery management system collection determines institute
Whether state battery is fail battery.
The temperature accuracy of the temperature sensor is ± 0.2 DEG C, and the voltage measurement accuracy of the pressure measuring instrument is
1mV。
The step (6) includes, at 23 ± 2 DEG C, with 1/3C to battery case discharge and recharge, monitors in real time each
The voltage of battery in individual battery case, determines the uniformity between battery in the capacity and battery case of battery case.
Compared with immediate prior art, the invention has the advantages that：
1. by the way that retired electrokinetic cell is directly detected, improved to battery case during secondary utilization
Detection efficiency；
2. secondary utilization is directly carried out to retired power battery box, so as to improve retired electric automobile power battery
The economy that echelon is utilized, reduction echelon utilizes the operating cost of battery energy storage system.
Brief description of the drawings
A kind of diagnostic method flow chart for retired power battery box of electric vehicle that Fig. 1 provides for the present invention.
Embodiment
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of diagnostic method for retired power battery box of electric vehicle that the present invention is provided.It is right
Retired power battery box of electric vehicle is detected as follows successively：1. visual examination；2. open-circuit voltage is detected；3.
Insulation monitoring；4. the DC internal resistance detection under pulse；5. precision and the environmental suitability detection of battery management system；
6. the charge and discharge electro-detection of battery case.
Detection can directly exclude the battery case for not possessing secondary value more than, and selecting can be direct
Carry out the secondary retired power battery box of electric vehicle utilized.It can be completed by this method within a few houres to electricity
The quick detection of pond case, it is to avoid first battery case is disassembled into battery cell in the process detected, is carried
The high efficiency of detection, reduces testing cost, so as to improve the secondary utilization of retired electric automobile power battery
Economy.Specific detecting step is as follows：
1. the visual examination of battery case
Check for connector loosening, voltage and temperature data acquisition between Battery case deformation, battery
Line loosening, battery pole ear fracture, battery leakage, battery management system connection loosen situations such as, such as exist with
Upper situation, then the battery case can not directly carry out secondary utilization.The process can be completed within 10 minutes.
2. open-circuit voltage is detected
The open-circuit voltage of each minimum series voltage is tested with High Precision Multimeter, check in FCL battery whether
There is the battery of no-voltage or voltage obvious relatively low (higher), that is, there is measurement voltage and be more than rated voltage
The battery that 5/4 times, 3/4 times less than rated voltage or measurement voltage are zero.If there is case above,
Then the battery case can not directly carry out secondary utilization.The process can be completed within 2 minutes.
3. the Insulation monitoring of battery case
Whether the resistance between the test total positive pole of battery case and total negative pole and the earth, detect battery case respectively
There is a situation where electric leakage, the insulaion resistance between total positive pole and total negative pole and the earth should be greater than 2M Ω, if not
Meet, the reason for causing the situation need to be checked, while the battery case can not directly carry out secondary utilization.The mistake
Journey can be completed within 1 minute.
4. retired electrokinetic cell DC internal resistance detection
Under room temperature environment (23 ± 2 DEG C), battery case is connected with charge-discharge test instrument, specific connected mode is：
Total electrode line just with charge-discharge test instrument of battery case is connected, total negative and charge-discharge test instrument of battery case
Negative line is connected, the positive pole of voltage acquisition line is connected with the positive pole of minimum series unit, and voltage acquisition line is born
Pole is connected with the negative pole of minimum series unit.Then the pulse for carrying out 30s to battery case with 1C-2C multiplying powers is put
Electricity, discharge current is designated as I, the voltage before each minimum series unit electric discharge of record and the voltage at the end of electric discharge,
Voltage before electric discharge is designated as V1, and the voltage at the end of electric discharge is designated as V2, calculates each minimum series unit
DC internal resistance R, calculation formula is：
R=(V2-V1)/I
According to result of calculation, the mean direct internal resistance of battery in the case is calculated, DC internal resistance is checked whether there is bright
Aobvious battery bigger than normal, i.e. DC internal resistance are more than 1.52 times of mean direct internal resistance.If there is such battery,
Then the battery case can not directly carry out secondary utilization.The process can be completed within 10 minutes.
5. precision and the environmental suitability detection of battery management system
(20 DEG C), battery case is connected with charge-discharge test instrument at room temperature, specific connected mode
For：Total electrode line just with charge-discharge test instrument of battery case is connected, total negative and charge-discharge test of battery case
The negative line connection of instrument, the positive pole of voltage acquisition line is connected with the positive pole of minimum series unit, voltage acquisition line
Negative pole be connected with the negative pole of minimum series unit；Simultaneously high accuracy is arranged in the temperature acquisition point of management system
Temperature sensor (temperature accuracy ± 0.2 DEG C).Discharge and recharge is carried out to battery case with 1/3C, in charge and discharge process,
Using high-accuracy voltage measuring instrument (voltage measurement accuracy：Each minimum series unit 1mV) is measured in real time
Voltage, the voltage and temperature acquisition precision of detection management system, the voltage and virtual voltage of management system collection
The magnitude value deviation of high-accuracy voltage measuring instrument must not exceed 20mV, the temperature and high accuracy of management system collection
The measured value deviation of the actual temperature temperature sensor of measurement point must not exceed 1 DEG C.At low temperature simultaneously
(- 20 DEG C) carry out discharge and recharge to battery case with 0.2C multiplying powers, and whether detection management can guarantee that essence in the present context
Degree.Battery management system for required precision can not be met, it is impossible to directly carry out secondary utilization.The process
It can be completed within 30 minutes.
6. the charge and discharge electro-detection of battery case
(23 ± 2 DEG C), battery case is connected with charge-discharge test instrument at room temperature, and specific connected mode is：Electricity
Total electrode line just with charge-discharge test instrument of pond case is connected, and always bearing for battery case is negative with charge-discharge test instrument
Polar curve is connected, and the positive pole of voltage acquisition line is connected with the positive pole of minimum series unit, the negative pole of voltage acquisition line
It is connected with the negative pole of minimum series unit, discharge and recharge is carried out to battery case at room temperature and then with 1/3C, investigated
Voltage difference in charge and discharge process between minimum series unit, according to battery in data analysis whole group battery case
Uniformity, judges the voltage and capacity volume variance between battery, and according to the result, whether judges the case battery
Secondary utilization can directly be carried out.The process can be completed within 7 hours.
It is to be understood that, present invention and embodiment are intended to prove technical side provided by the present invention
The practical application of case, should not be construed as limiting the scope of the present invention.Those skilled in the art are in this hair
, can various modifications may be made, equivalent substitution or improves under bright spirit and principle are inspired.But these change or repaiied
Change and applying in pending protection domain.
Claims (8)
1. a kind of diagnostic method of retired power battery box of electric vehicle, it is characterised in that：Methods described includes
Following steps：
(1) outward appearance of battery case is checked；
(2) open-circuit voltage of battery case is detected；
(3) insulating properties of battery case is detected；
(4) DC internal resistance of the detection battery case under pulse；
(5) precision and environmental suitability of the battery management system of detection battery case；
(6) the charge and discharge electro-detection of battery case.
2. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：The step (1) includes checking whether there is box deformation, connector loosening, voltage and temperature
Data acquisition line loosens, it is damaged or come off, lug fracture, battery case leakage and battery case management system are damaged
Or loosen.
3. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：The step (2) includes：The open-circuit voltage of battery case series-connected cell is measured with universal meter, and really
Whether the fixed battery is fail battery.
4. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：The resistance that the step (3) is included between total positive pole or total negative pole and the earth according to battery case is true
Whether the fixed battery case is the battery case leaked electricity.
5. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：In the step (4), the detection method of DC internal resistance of the battery case under pulse includes：
At 23 ± 2 DEG C, the both positive and negative polarity of charge-discharge test instrument is connected with the total negative pole of total positive pole of battery case respectively,
Both positive and negative polarity of the both positive and negative polarity of voltage acquisition line respectively with battery case series-connected cell is connected；
When carrying out 30s pulsed discharge to battery case with 1C-2C multiplying powers, internal resistance R is calculated as follows：
R=(V2-V1)/I
In formula：I is the direct-current discharge electric current of series-connected cell, and V1 and V2 are respectively series-connected cell in battery case
The voltage at the end of voltage and electric discharge before electric discharge；
And determine whether the battery is fail battery according to the R values of calculating.
6. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：The step (5) includes：
The both positive and negative polarity of charge-discharge test instrument is connected with the total negative pole of total positive pole of battery case respectively, voltage acquisition line
Both positive and negative polarity of the both positive and negative polarity respectively with battery case series-connected cell be connected；The battery management system is provided with temperature
Sensor and pressure measuring instrument；
At for 20 DEG C and -20 DEG C, discharge and recharge is carried out to battery case with 1/3C multiplying powers and 1/5C multiplying powers respectively,
In real time collection battery management system voltage and temperature, and according to the battery management system gather voltage with
The deviation of the temperature and actual temperature of the numerical bias of virtual voltage and battery management system collection determines institute
Whether state battery is fail battery.
7. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 6, it is special
Levy and be：The temperature accuracy of the temperature sensor is ± 0.2 DEG C, the voltage measurement accuracy of the pressure measuring instrument
For 1mV.
8. a kind of diagnostic method of retired power battery box of electric vehicle according to claim 1, it is special
Levy and be：The step (6) includes, at 23 ± 2 DEG C, with 1/3C to battery case discharge and recharge, in real time monitoring
The voltage of battery in each battery case, is determined consistent between battery in the capacity and battery case of battery case
Property.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290668A (en) * | 2016-04-01 | 2017-10-24 | 中国电力科学研究院 | The screening method for group matching that a kind of batteries of electric automobile echelon is utilized |
| CN109860736A (en) * | 2018-11-13 | 2019-06-07 | 中国电力科学研究院有限公司 | The big data system and method utilized for battery echelon |
| CN109900487A (en) * | 2017-12-07 | 2019-06-18 | 宝沃汽车（中国）有限公司 | Insulation detecting method, system and the electric car of electric car |
| CN110221223A (en) * | 2019-05-08 | 2019-09-10 | 昆山正金软件科技有限公司 | A kind of estimation on line method of lithium ion battery SOH |
| CN110653180A (en) * | 2018-06-29 | 2020-01-07 | 中国电力科学研究院有限公司 | Sorting method and device for returned batteries for power grid frequency modulation |
| CN110661041A (en) * | 2018-06-29 | 2020-01-07 | 中国电力科学研究院有限公司 | Method and device for diagnosing retired power battery |
| CN110726942A (en) * | 2018-06-29 | 2020-01-24 | 中国电力科学研究院有限公司 | Ex-service power battery safety state nondestructive evaluation method and device |
| CN111426966A (en) * | 2020-02-29 | 2020-07-17 | 青岛能蜂电气有限公司 | Electric vehicle battery recombination method and device and electronic equipment |
| CN113118056A (en) * | 2021-04-16 | 2021-07-16 | 奇瑞商用车（安徽）有限公司 | Lithium battery echelon utilization screening method |
| CN113296000A (en) * | 2021-03-23 | 2021-08-24 | 上海工程技术大学 | Disassembly-free lithium battery rapid detection, diagnosis and analysis system and method |
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| CN110653180A (en) * | 2018-06-29 | 2020-01-07 | 中国电力科学研究院有限公司 | Sorting method and device for returned batteries for power grid frequency modulation |
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| CN111426966A (en) * | 2020-02-29 | 2020-07-17 | 青岛能蜂电气有限公司 | Electric vehicle battery recombination method and device and electronic equipment |
| CN113296000A (en) * | 2021-03-23 | 2021-08-24 | 上海工程技术大学 | Disassembly-free lithium battery rapid detection, diagnosis and analysis system and method |
| CN113118056A (en) * | 2021-04-16 | 2021-07-16 | 奇瑞商用车（安徽）有限公司 | Lithium battery echelon utilization screening method |
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