CN102645635A - Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC) - Google Patents

Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC) Download PDF

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Publication number
CN102645635A
CN102645635A CN2012100950753A CN201210095075A CN102645635A CN 102645635 A CN102645635 A CN 102645635A CN 2012100950753 A CN2012100950753 A CN 2012100950753A CN 201210095075 A CN201210095075 A CN 201210095075A CN 102645635 A CN102645635 A CN 102645635A
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Prior art keywords
voltage
ocv
soc
electric core
relation
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Pending
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CN2012100950753A
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Chinese (zh)
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刘飞
文锋
阮旭松
欧玉龙
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Huizhou Epower Electronics Co Ltd
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Huizhou Epower Electronics Co Ltd
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Priority to CN2012100950753A priority Critical patent/CN102645635A/en
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Abstract

The invention relates to a device and a method for testing a corresponding relation between an open circuit voltage (OCV) and a system on chip (SOC). The device comprises a simulated load and simulated battery cells, wherein a battery management system, a charge-discharge test cabinet capable of performing charge-discharge tests on a standard battery cell and a constant-temperature and constant-humidity test box used for simulating various temperature and humidity environments of the standard battery cell are connected between the simulated load and the simulated battery cells. The method for testing the corresponding relation between the OCV and the SOC comprises the following steps of: connecting the standard battery cell with the device for testing the corresponding relation between the OCV and the SOC; setting a required temperature and humidity environment; and performing charge test and discharge test on the standard battery cell. By the device and the method, various working environments can be accurately simulated, the measured data are closer to an actual working condition value, and a tested data curve takes the total voltage, the lowest monomer voltage and the average monomer voltage as a horizontal axis and the capacities of the battery cells as a longitudinal axis; and the drawn curve is an OCV curve which provides a data basis for SOC correction.

Description

The proving installation of a kind of OCV and SOC corresponding relation and method of testing
Technical field
The present invention relates to a kind of proving installation and the method for testing that can accurately test OCV and SOC corresponding relation.
Background technology
Present electrical core of power battery OCV (open-circuit voltage, Open Circuit Voltage) method of testing is: couple together standard electric core and battery management system, put the electricity of standard electric core earlier, test open-circuit voltage at this moment; When being charged to battery management system to SOC value then and showing 50, test the open-circuit voltage of electric core; Then be full of electric core the test open-circuit voltage.This scheme has following deficiency and shortcoming:
1. define narrowly, ignore the influence of variables, all be defined as open-circuit voltage to OCV at present; And this does not consider actual application feature in fact; Temperature is very big to voltage, the capacity impact of battery, and different temperatures can obtain different OCV curves, and is little to the application effect of reality.
2. do not connect with practical application, the purpose of OCV test at present is the performance of the electric core of checking, and its another important value is the dump energy correction service for car load, and existing OCV tests and all do not utilize these data.
3. whether the have no basis demonstration of judging battery management system of test process is true; Whether detect the battery management system of producing qualified; The data that must have a known more accurate equipment to measure contrast; Present testing scheme does not have contrast test equipment, can not judge in fact whether the battery management system data presented is true.
Above deficiency causes present battery management system test error big, and range of application is little, and CSAT is low.Existing testing scheme structural topology figure is shown in accompanying drawing 1, and wherein label 5 is that battery management system, label 2 are Test Host for analog electrical core, label 6.
Summary of the invention
In view of this, the technical matters that the present invention will solve provides the proving installation and the method for testing of a kind of OCV and SOC corresponding relation, can provide the test science to test accurately to OCV and SOC, for subsequent applications provides the accurate data foundation.
In order to solve the problems of the technologies described above, the present invention adopts following mode to realize:
The OCV of the present invention's design and the proving installation of SOC corresponding relation comprise fictitious load and analog electrical core, between fictitious load and analog electrical core, connect battery management system.
And this device also comprises and can carry out the charge-discharge test cabinet of charge-discharge test and the constant temperature humidity chamber of mock standard electricity core all temps humidity environment to the standard electric core.
The OCV of the present invention design and the method for testing of SOC corresponding relation comprise: with the standard electric core with after the proving installation of OCV and SOC corresponding relation is connected, temperature, the humidity environment of setting needs, the charging measurement step and the discharge test step of the electric core of operative norm,
Wherein, the charging measurement step comprises:
With the cut-off voltage of the 1C velocity of discharge to standard electric core-→ leave standstill 5H-→ charge to standard electric core capacity C * 10% (Ah) with the 0.1C charging rate; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; C * 20% (Ah), C * 30% (Ah), C * 40% (Ah), C * 50% (Ah), C * 60% (Ah), C * 70% (Ah), C * 80% (Ah), C * 90% (Ah), the C (Ah) that charge to standard electric core capacity with the 0.1C charging rate respectively then repeat above-mentioned steps; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC charging corresponding relation curve;
Wherein, the discharge test step comprises:
With the cut-off voltage of 0.3C charging rate to standard electric core-→ leave standstill 5H-→ be discharged to standard electric core capacity C * 90% (Ah) with the 0.1C velocity of discharge; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; Be discharged to standard electric core capacity C * 80% (Ah), C * 70% (Ah), C * 60% (Ah), C * 50% (Ah), C * 40% (Ah), C * 30% (Ah), C * 20% (Ah), C * 10% (Ah), 0 (Ah) with the 0.1C velocity of discharge respectively then and repeat above step; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC discharge corresponding relation curve.
The present invention is through setting up constant temperature humidity chamber, playback battery testing cabinet and load; Can accurately simulate various working environments; The data of measuring are more near the actual condition value; Utilize load to verify the function of battery management system under the various charging and discharging states, utilize the difference of charge-discharge test cabinet control cell Management System Data and real data.This curve is a transverse axis with total voltage, minimum monomer voltage, average monomer voltage, and electric core capacity is the longitudinal axis, and the curve that is depicted as is the OCV curve.When electric automobile behind too urgent acceleration, big electric current such as turn on the aircondition, cause SOC value inaccurate, this OCV curve is that the SOC correction provides the data foundation.
Description of drawings
Fig. 1 is the proving installation topological diagram of existing OCV and SOC corresponding relation.
Fig. 2 is the proving installation topological diagram of OCV of the present invention and SOC corresponding relation.
Embodiment
Defective to prior art exists below will combine accompanying drawing to describe in further detail of the present invention for the ease of it will be appreciated by those skilled in the art that:
The OCV that present embodiment discloses and the proving installation of SOC corresponding relation have overcome does not consider defectives such as environmental variance, test data are inaccurate in the existing proving installation, set up the constant temperature humidity chamber of simulated environment humiture and can test the charge-discharge test cabinet of charge/discharge electricity amount.Constant temperature humidity chamber and charge-discharge test cabinet can adopt prior art.
Whole; This proving installation comprises fictitious load 1 and analog electrical core 2; Between fictitious load and analog electrical core, connect battery management system 5, charge-discharge test cabinet 3 can carry out charge-discharge test to the standard electric core, but constant temperature humidity chamber 4 mock standards electricity core all temps humidity environment.
Through this proving installation, can realize the method for testing of a kind of OCV and SOC corresponding relation equally, at first with the standard electric core with after this proving installation is connected, temperature, humidity environment that setting needs, the charging measurement step and the discharge test step of operative norm electricity core,
Wherein, the charging measurement step comprises:
With the cut-off voltage of the 1C velocity of discharge to standard electric core-→ leave standstill 5H-→ charge to standard electric core capacity C * 10% (Ah) with the 0.1C charging rate; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; C * 20% (Ah), C * 30% (Ah), C * 40% (Ah), C * 50% (Ah), C * 60% (Ah), C * 70% (Ah), C * 80% (Ah), C * 90% (Ah), the C (Ah) that charge to standard electric core capacity with the 0.1C charging rate respectively then repeat above-mentioned steps; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC charging corresponding relation curve;
Wherein, the discharge test step comprises:
With the cut-off voltage of 0.3C charging rate to standard electric core-→ leave standstill 5H-→ be discharged to standard electric core capacity C * 90% (Ah) with the 0.1C velocity of discharge; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; Be discharged to standard electric core capacity C * 80% (Ah), C * 70% (Ah), C * 60% (Ah), C * 50% (Ah), C * 40% (Ah), C * 30% (Ah), C * 20% (Ah), C * 10% (Ah), 0 (Ah) with the 0.1C velocity of discharge respectively then and repeat above step; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC discharge corresponding relation curve.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (3)

1. the proving installation of OCV and SOC corresponding relation is characterized in that this proving installation comprises fictitious load (1) and analog electrical core (2), between fictitious load and analog electrical core, connects battery management system (5).
2. the proving installation of OCV according to claim 1 and SOC corresponding relation; It is characterized in that this device also comprises and can carry out the charge-discharge test cabinet (3) of charge-discharge test and the constant temperature humidity chamber (4) of mock standard electricity core all temps humidity environment to the standard electric core.
3. the method for testing of OCV and SOC corresponding relation is characterized in that, with the standard electric core with after the proving installation of OCV and SOC corresponding relation is connected, temperature, humidity environment that setting needs, the charging measurement step and the discharge test step of operative norm electricity core,
Wherein, the charging measurement step comprises:
With the cut-off voltage of the 1C velocity of discharge to standard electric core-→ leave standstill 5H-→ charge to standard electric core capacity C * 10% (Ah) with the 0.1C charging rate; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; C * 20% (Ah), C * 30% (Ah), C * 40% (Ah), C * 50% (Ah), C * 60% (Ah), C * 70% (Ah), C * 80% (Ah), C * 90% (Ah), the C (Ah) that charge to standard electric core capacity with the 0.1C charging rate respectively then repeat above-mentioned steps; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC charging corresponding relation curve;
Wherein, the discharge test step comprises:
With the cut-off voltage of 0.3C charging rate to standard electric core-→ leave standstill 5H-→ be discharged to standard electric core capacity C * 90% (Ah) with the 0.1C velocity of discharge; Record this moment total voltage, minimum monomer voltage, average monomer magnitude of voltage-→ leave standstill 5H; Be discharged to standard electric core capacity C * 80% (Ah), C * 70% (Ah), C * 60% (Ah), C * 50% (Ah), C * 40% (Ah), C * 30% (Ah), C * 20% (Ah), C * 10% (Ah), 0 (Ah) with the 0.1C velocity of discharge respectively then and repeat above step; Write down total voltage under the above-mentioned state, minimum monomer voltage, average monomer magnitude of voltage respectively; Be transverse axis with total voltage, minimum monomer voltage, average monomer voltage respectively then, electric core capacity is that the longitudinal axis is depicted as OCV and SOC discharge corresponding relation curve.
CN2012100950753A 2012-03-31 2012-03-31 Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC) Pending CN102645635A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103064029A (en) * 2012-12-20 2013-04-24 中国北方车辆研究所 Environmental simulation testing device and testing method of power battery pack
CN103353575A (en) * 2013-06-14 2013-10-16 东莞新能源科技有限公司 Test apparatus and test method for measuring correspondence between OCV (open circuit voltage) and SOC (state of charge)
CN103675699A (en) * 2013-11-28 2014-03-26 惠州市亿能电子有限公司 Safety testing method of battery system
CN104297690A (en) * 2014-09-22 2015-01-21 北汽福田汽车股份有限公司 Lithium battery SOC-OCV curve determination method
CN104330738A (en) * 2014-10-21 2015-02-04 陈佩 Cell capacity detection method and device
CN104714182A (en) * 2013-12-11 2015-06-17 广州汽车集团股份有限公司 Method and system for determining state-of-charge value of battery
CN105044614A (en) * 2015-08-05 2015-11-11 国家电网公司 Single-phase electric energy meter battery life acceleration test system and method
CN105759212A (en) * 2016-01-27 2016-07-13 惠州市蓝微新源技术有限公司 Battery pack fault simulation method and fault detection method
CN108760257A (en) * 2018-04-04 2018-11-06 杭州高品自动化设备有限公司 A kind of air testing method of OCV valves
CN109061485A (en) * 2018-06-30 2018-12-21 合肥国轩高科动力能源有限公司 A kind of SOC-OCV test method in lithium ion battery discharge process
CN109683094A (en) * 2018-12-19 2019-04-26 武汉新能源研究院有限公司 A kind of quick method for separating and its sorting unit of lithium ion battery
CN110386029A (en) * 2019-07-23 2019-10-29 安徽力高新能源技术有限公司 It is a kind of that lithium battery SOC method is corrected according to dynamic electric voltage
CN110618389A (en) * 2019-09-25 2019-12-27 宝能汽车有限公司 Method and device for testing battery SOC-OCV curve
CN110780201A (en) * 2019-12-02 2020-02-11 苏州易来科得科技有限公司 Method for determining highest tolerance temperature of battery

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103064029A (en) * 2012-12-20 2013-04-24 中国北方车辆研究所 Environmental simulation testing device and testing method of power battery pack
CN103064029B (en) * 2012-12-20 2015-05-20 中国北方车辆研究所 Environmental simulation testing device and testing method of power battery pack
CN103353575A (en) * 2013-06-14 2013-10-16 东莞新能源科技有限公司 Test apparatus and test method for measuring correspondence between OCV (open circuit voltage) and SOC (state of charge)
CN103675699A (en) * 2013-11-28 2014-03-26 惠州市亿能电子有限公司 Safety testing method of battery system
CN104714182A (en) * 2013-12-11 2015-06-17 广州汽车集团股份有限公司 Method and system for determining state-of-charge value of battery
CN104297690A (en) * 2014-09-22 2015-01-21 北汽福田汽车股份有限公司 Lithium battery SOC-OCV curve determination method
CN104330738A (en) * 2014-10-21 2015-02-04 陈佩 Cell capacity detection method and device
CN105044614A (en) * 2015-08-05 2015-11-11 国家电网公司 Single-phase electric energy meter battery life acceleration test system and method
CN105759212B (en) * 2016-01-27 2019-08-30 惠州市蓝微新源技术有限公司 Battery pack failure simulation method and fault detection method
CN105759212A (en) * 2016-01-27 2016-07-13 惠州市蓝微新源技术有限公司 Battery pack fault simulation method and fault detection method
CN108760257A (en) * 2018-04-04 2018-11-06 杭州高品自动化设备有限公司 A kind of air testing method of OCV valves
CN109061485A (en) * 2018-06-30 2018-12-21 合肥国轩高科动力能源有限公司 A kind of SOC-OCV test method in lithium ion battery discharge process
CN109683094A (en) * 2018-12-19 2019-04-26 武汉新能源研究院有限公司 A kind of quick method for separating and its sorting unit of lithium ion battery
CN110386029A (en) * 2019-07-23 2019-10-29 安徽力高新能源技术有限公司 It is a kind of that lithium battery SOC method is corrected according to dynamic electric voltage
CN110618389A (en) * 2019-09-25 2019-12-27 宝能汽车有限公司 Method and device for testing battery SOC-OCV curve
CN110780201A (en) * 2019-12-02 2020-02-11 苏州易来科得科技有限公司 Method for determining highest tolerance temperature of battery

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