CN113075571A - Lithium ion battery OCV determining method, device and system - Google Patents

Lithium ion battery OCV determining method, device and system Download PDF

Info

Publication number
CN113075571A
CN113075571A CN202110313697.8A CN202110313697A CN113075571A CN 113075571 A CN113075571 A CN 113075571A CN 202110313697 A CN202110313697 A CN 202110313697A CN 113075571 A CN113075571 A CN 113075571A
Authority
CN
China
Prior art keywords
value
temperature
test
circuit voltage
open
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110313697.8A
Other languages
Chinese (zh)
Inventor
丁仁义
王磊
姜倩荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Eve Power Co Ltd
Original Assignee
Hubei Eve Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Eve Power Co Ltd filed Critical Hubei Eve Power Co Ltd
Priority to CN202110313697.8A priority Critical patent/CN113075571A/en
Publication of CN113075571A publication Critical patent/CN113075571A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • G01R31/387—Determining ampere-hour charge capacity or SoC
    • G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
    • 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]
    • G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
    • 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]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables

Abstract

The invention discloses a method, a device and a system for determining OCV of a lithium ion battery. The lithium ion battery OCV determination method comprises the following steps: determining an environment temperature value, an open-circuit voltage test value under the environment temperature value, and calculating a temperature change value of the environment temperature value and a set temperature value; determining a temperature compensation value through a temperature compensation curve and a temperature change value, and correcting an open-circuit voltage test value to an open-circuit voltage value under a set temperature value according to the temperature compensation value; the temperature compensation curve is formed by fitting a plurality of temperature difference values of the test temperature values and the set temperature value, and a voltage difference value of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.

Description

Lithium ion battery OCV determining method, device and system
Technical Field
The embodiment of the invention relates to a battery testing technology, in particular to a method, a device and a system for determining OCV of a lithium ion battery.
Background
The self-discharge of the lithium ion battery directly determines the electrical property of the lithium ions, and influences the quality, matching consistency and service life of the lithium ions. At present, the self-discharge rate screening method is commonly adopted for the self-discharge detection of the lithium ion battery, namely, the change of the open circuit voltage of the lithium ion battery in a standing state within a period of time is tested. However, for lithium ions in a certain charge capacity range, the open-circuit voltage variation caused by self-discharge in a short time is small, and the measurement of the open-circuit voltage is greatly influenced by the ambient temperature, which results in that the process of testing the self-discharge rate of the lithium ion battery is greatly influenced by the environmental factors.
For the lithium ion battery produced in an industrialized way, the temperature is difficult to be maintained at a stable level in the standing process, and the change of the open-circuit voltage cannot reflect the real self-discharge voltage drop, so that the self-discharge rate data is distorted. Meanwhile, the temperatures of lithium ion batteries produced in different batches and in different time periods are different, and when the self-discharge judgment and sorting are carried out by using the preset screening standard, certain influence is caused on the self-discharge consistency of the lithium ion batteries and the subsequent grouping process. In the prior art, the open-circuit voltage is usually corrected by introducing a temperature drift correction coefficient, and the method sets different calibration gains, calibration zero points, correction gains and correction zero points for different environmental temperatures and performs compensation correction on the acquired voltage data by combining a specific calculation formula. The method considers the measurement conditions under different environmental temperatures, but cannot compensate for a specific battery type, and the electrical properties of lithium ion batteries of different types are different, so the method has certain limitation in the industrial production of the lithium ion batteries.
Disclosure of Invention
The invention provides a method, a device and a system for determining an OCV (open circuit voltage) of a lithium ion battery, which aim to solve the problem of inaccurate measurement of an open circuit voltage caused by the influence of temperature factors.
In a first aspect, an embodiment of the present invention provides a method for determining an OCV of a lithium ion battery, including:
determining an environment temperature value, an open circuit voltage test value under the environment temperature value, and calculating a temperature change value of the environment temperature value and a set temperature value;
determining a temperature compensation value through a temperature compensation curve and the temperature change value, and correcting the open-circuit voltage test value to an open-circuit voltage value under the set temperature value according to the temperature compensation value;
the temperature compensation curve is formed by fitting based on temperature difference values of a plurality of test temperature values and the set temperature value, and voltage difference values of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.
Further, the temperature compensation curve is a linear equation.
Further, the set temperature value is 10-30 ℃.
Further, the difference value between two adjacent test temperature values is 0-5 ℃.
Further, the test open-circuit voltage value is obtained by measuring the battery after the battery reaches the test temperature value and stands for a set time.
Further, the set time is 0-5 hours.
Further, the upper limit value of the test temperature value is 45-60 ℃.
In a second aspect, an embodiment of the present invention further provides a lithium ion battery OCV determination apparatus, including:
the data acquisition unit is used for determining an environment temperature value and an open circuit voltage test value under the environment temperature value;
the open-circuit voltage determining unit is used for calculating a temperature change value of the environment temperature value and a set temperature value, determining a temperature compensation value through a temperature compensation curve and the temperature change value, and correcting the open-circuit voltage test value to an open-circuit voltage value under the set temperature value according to the temperature compensation value;
the temperature compensation curve is formed by fitting based on temperature difference values of a plurality of test temperature values and the set temperature value, and voltage difference values of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.
Further, the temperature compensation curve is a linear equation.
In a third aspect, an embodiment of the present invention further provides a lithium ion battery OCV determination system, which is used for executing the lithium ion battery OCV determination method described in the embodiment.
Compared with the prior art, the invention has the beneficial effects that: in the OCV determining method provided by the invention, the open-circuit voltage of the battery to be measured, which is measured at different environmental temperatures, is corrected to the open-circuit voltage corresponding to the set temperature value through the temperature compensation curve, so that the problem of inaccurate open-circuit voltage measurement caused by the influence of temperature factors can be avoided.
Drawings
FIG. 1 is a flow chart of an OCV determination method in an embodiment;
fig. 2 is a schematic diagram of the OCV determination device in the embodiment;
fig. 3 is a block diagram of an OCV determination system in an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of an OCV determination method in an embodiment, and referring to fig. 1, the OCV determination method for a lithium ion battery includes:
s101, determining an environment temperature value, an open-circuit voltage test value under the environment temperature value, and calculating a temperature change value of the environment temperature value and a set temperature value.
For example, in this embodiment, the environmental temperature value is a temperature value of an environment where the battery to be tested is located, and the Open Circuit Voltage test value is an Open Circuit Voltage (OCV) value of the battery to be tested, which is obtained by measurement at the current environmental temperature value.
Exemplary, open circuit voltage test value is OCV0And the ambient temperature value is recorded as T0And the set temperature value is recorded as Ts. The temperature change was recorded as Δ TwWhich is the difference between the ambient temperature value and the set temperature value.
S102, determining a temperature compensation value through a temperature compensation curve and a temperature change value, and correcting the open-circuit voltage test value to an open-circuit voltage value under a set temperature value according to the temperature compensation value.
For example, in this embodiment, the temperature compensation curve is formed by fitting a plurality of temperature difference values between the test temperature values and the set temperature values, and a voltage difference value between the test open-circuit voltage value corresponding to each test temperature value and the test initial open-circuit voltage value corresponding to the set temperature value.
For example, in this embodiment, the fitting process of the temperature compensation curve may be:
step 1, charging the battery to a set charge amount, controlling the environment temperature to an initial temperature value, and recording an initial open-circuit voltage value.
For example, in this step, the initial temperature value may be the same as the set temperature value, or may be different from the set temperature value. And after the temperature of the environment where the test battery is located is adjusted to an initial temperature value, measuring and recording an open-circuit voltage value corresponding to the initial temperature value.
Illustratively, the selected initial temperature value and the set temperature value TsThe same is true. The open circuit voltage value recorded above was recorded as OCVc。
Illustratively, in this step, the battery is charged to a set charge amount and then is left to stand for more than 24 hours, the change of the battery voltage is recorded during the standing process, the open-circuit voltage value recorded when the change of the battery voltage tends to be stable is taken as an initial open-circuit voltage value, and then step 2 is performed.
And 2, from the initial temperature value, controlling the environmental temperature to change to a plurality of test temperature values, and recording the open-circuit voltage value at each test temperature value.
Illustratively, in this step, the test temperature value is denoted as TiAnd the open-circuit voltage value corresponding to the test temperature value is recorded as OCVi。
For example, in this step, the set difference between two adjacent test temperature values may be the same or different, and the set difference between two adjacent test temperature values may be determined according to an empirical value.
For example, in this embodiment, the set temperature value may be 10 to 30 ℃, the difference between two adjacent test temperature values may be 0 to 5 ℃, the set time may be 0 to 5 hours, and the upper limit of the test temperature value may be 45 to 60 ℃.
As an embodiment, the temperature value is set to 20 ℃, the upper limit value of the test temperature value is set to 50 ℃, and the difference between two adjacent test temperature values is set to 3 ℃.
As an implementation example, the environmental temperature is controlled to change to a plurality of test temperature values, and the open-circuit voltage value recorded at each test temperature value may be:
adjusting the temperature of the test environment to 20 ℃, standing for 1 hour, measuring the open-circuit voltage value, and recording as OCV1Increasing the test temperature by taking 3 ℃ as the temperature change amplitude, measuring the open-circuit voltage value after standing for 1 hour when the temperature rises by 3 ℃, and recording as OCViUntil the test ambient temperature was raised to 50 ℃.
For example, in this embodiment, the open circuit voltage value at each test temperature value is measured after the battery reaches each test temperature value and is left for 1 hour.
In an exemplary embodiment, the open circuit voltage value corresponding to the test environment temperature may be determined according to the above procedure according to different standing time periods. For example, setting the standing time periods to be 0 hour, 1 hour, 2 hours, 5 hours, 10 hours, etc., respectively obtaining a plurality of sets of open-circuit voltage values, recording the open-circuit voltage value corresponding to the standing time period of 0 hour as OCV _0, recording the open-circuit voltage values corresponding to the standing time periods of 1 hour, 2 hours, etc., as OCV _ i, respectively calculating the deviation value between each set of open-circuit voltage values OCV _ i and open-circuit voltage value OCV _0, and comparing the deviation values to determine that when the standing time is 1 hour, the standing time is the shortest and the deviation value is not changed greatly from the deviation values corresponding to other standing times, so that selecting 1 hour as the standing time can shorten the test process of fitting the temperature compensation curve.
And 3, calculating a temperature difference value between each test temperature value and each initial temperature value, calculating a voltage difference value of an open circuit voltage value corresponding to each open circuit voltage value and each initial temperature value, and fitting a temperature compensation curve according to the temperature difference values and the voltage difference values.
Illustratively, in this step,the temperature difference between each test temperature value and the initial temperature value is recorded as delta TiThe calculation method is as follows:
ΔTi＝Ti-Ts
the voltage difference of the open-circuit voltage value corresponding to each open-circuit voltage value and the initial temperature value is recorded as delta OCViThe calculation method is as follows:
ΔOCVi＝OCVi-OCVc
illustratively, a set of temperature differences Δ T may be obtained through the above processiA set of voltage difference values Δ OCViSetting a temperature compensation curve as follows:
ΔOCV＝f(ΔT)
and fitting the temperature compensation curve based on the temperature difference value and the voltage difference value to obtain a specific temperature compensation curve function formula.
Illustratively, the temperature is varied by a value Δ TwThe temperature compensation value can be obtained by substituting the temperature curve equation, and the temperature compensation value is recorded as delta OCVbThen, the open-circuit voltage value at the set temperature value is:
OCVs＝OCV0+ΔOCVb
for example, in the present embodiment, the open-circuit voltage value OCV at the set temperature valuesAs the true open circuit voltage value of the battery to be tested.
As an exemplary, implementable embodiment, the temperature compensation curve is a linear equation, and specifically, the temperature compensation curve may be set in the form of:
ΔOCV＝AΔT+B
and fitting a temperature compensation curve based on the temperature difference value and the voltage difference value, and determining a temperature compensation coefficient A, B to obtain a specific temperature compensation curve function formula.
In this embodiment, during the open-circuit voltage test of the battery, the open-circuit voltage of the battery to be tested, which is measured at different environmental temperatures, is corrected to the open-circuit voltage corresponding to the set temperature value through the temperature compensation curve, so that the problem of inaccurate open-circuit voltage measurement caused by the influence of temperature factors can be avoided.
For example, in this embodiment, for lithium ion batteries of different models, one temperature compensation curve may be fitted respectively, and for lithium ion batteries of different models, a corresponding temperature compensation curve is selected for temperature compensation, so as to ensure accuracy of open-circuit voltage measurement.
For example, in this embodiment, the OCV determining method is mainly used for determining an open-circuit voltage value of a battery to be tested before the lithium ion battery leaves a factory.
Example two
Fig. 2 is a schematic diagram of an OCV determination device in the embodiment, and referring to fig. 2, the embodiment proposes a lithium ion battery OCV determination device including: a data acquisition unit 100 and an open circuit voltage determination unit 200.
The data acquisition unit 100 is configured to determine an ambient temperature value and acquire an open-circuit voltage test value at the ambient temperature value.
The open circuit voltage determination unit 200 is configured to calculate a temperature variation value between the environment temperature value and the set temperature value, determine a temperature compensation value according to the temperature compensation curve and the temperature variation value, and correct the open circuit voltage test value to the open circuit voltage value at the set temperature value according to the temperature compensation value.
In this embodiment, the specific functions of the data acquisition unit and the open-circuit voltage determination unit are the same as those described in the first embodiment.
In this embodiment, the temperature compensation curve configured in the open-circuit voltage determination unit 200 is formed by fitting based on temperature difference values of a plurality of test temperature values and set temperature values, and voltage difference values of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.
For example, in this embodiment, the fitting method of the temperature compensation curve is the same as that described in the first embodiment, and the temperature compensation curve may be set as a linear equation.
The advantageous effects of the OCV determination device proposed in the present embodiment are the same as those of the OCV determination method described in the first embodiment.
EXAMPLE III
Fig. 3 is a block diagram of an OCV determination system in an embodiment, and referring to fig. 3, the embodiment provides an OCV determination system for a lithium ion battery, which includes a controller 1, an open-circuit voltage measurement unit 2, and a thermometer 3, where the controller 1 is connected to the open-circuit voltage measurement unit 2 and the thermometer 3, respectively.
The controller 1 is configured to implement the method for determining OCV of the lithium ion battery described in the first embodiment, the open-circuit voltage measuring unit 2 is configured to collect open-circuit voltage of the battery 1000, and the thermometer 3 is configured to collect temperature of an environment where the battery 1000 is located.
In this embodiment, the beneficial effects of the OCV determination system are the same as those of the OCV determination method in the first embodiment, and are not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A lithium ion battery OCV determination method is characterized by comprising the following steps:
determining an environment temperature value, an open circuit voltage test value under the environment temperature value, and calculating a temperature change value of the environment temperature value and a set temperature value;
determining a temperature compensation value through a temperature compensation curve and the temperature change value, and correcting the open-circuit voltage test value to an open-circuit voltage value under the set temperature value according to the temperature compensation value;
the temperature compensation curve is formed by fitting based on temperature difference values of a plurality of test temperature values and the set temperature value, and voltage difference values of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.
2. The method for determining OCV of a lithium ion battery of claim 1, wherein the temperature compensation curve is a linear equation.
3. The method for determining the OCV of the lithium ion battery according to claim 1, wherein the set temperature value is 10 to 30 ℃.
4. The method for determining the OCV of the lithium ion battery according to claim 1, wherein the difference between two adjacent test temperature values is 0-5 ℃.
5. The method for determining the OCV of the lithium ion battery according to claim 1, wherein the test open circuit voltage value is determined after the battery reaches the test temperature value and is left for a set time.
6. The method for determining the OCV of the lithium ion battery according to claim 5, wherein the set time is 0 to 5 hours.
7. The method for determining the OCV of the lithium ion battery according to claim 1, wherein the upper limit value of the test temperature value is 45-60 ℃.
8. A lithium ion battery OCV determination device, characterized by comprising:
the data acquisition unit is used for determining an environment temperature value and an open circuit voltage test value under the environment temperature value;
the open-circuit voltage determining unit is used for calculating a temperature change value of the environment temperature value and a set temperature value, determining a temperature compensation value through a temperature compensation curve and the temperature change value, and correcting the open-circuit voltage test value to an open-circuit voltage value under the set temperature value according to the temperature compensation value;
the temperature compensation curve is formed by fitting based on temperature difference values of a plurality of test temperature values and the set temperature value, and voltage difference values of a test open-circuit voltage value corresponding to each test temperature value and a test initial open-circuit voltage value corresponding to the set temperature value.
9. The lithium-ion battery OCV determination device of claim 8, wherein the temperature compensation curve is a linear equation.
10. A lithium ion battery OCV determination system characterized by being configured to execute the lithium ion battery OCV determination method according to claim 1.
CN202110313697.8A 2021-03-24 2021-03-24 Lithium ion battery OCV determining method, device and system Pending CN113075571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110313697.8A CN113075571A (en) 2021-03-24 2021-03-24 Lithium ion battery OCV determining method, device and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110313697.8A CN113075571A (en) 2021-03-24 2021-03-24 Lithium ion battery OCV determining method, device and system

Publications (1)

Publication Number Publication Date
CN113075571A true CN113075571A (en) 2021-07-06

Family

ID=76613733

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110313697.8A Pending CN113075571A (en) 2021-03-24 2021-03-24 Lithium ion battery OCV determining method, device and system

Country Status (1)

Country Link
CN (1) CN113075571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113608138A (en) * 2021-07-30 2021-11-05 东风汽车有限公司东风日产乘用车公司 Storage battery power shortage risk monitoring method, electronic equipment and storage medium

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352968A (en) * 1992-05-28 1994-10-04 Apple Computer, Inc. Battery charge state determination
EP2023153A2 (en) * 2007-07-30 2009-02-11 Mitsumi Electric Co., Ltd. Battery status detecting method and battery status detecting apparatus
US20140172332A1 (en) * 2012-12-18 2014-06-19 GM Global Technology Operations LLC Methods and systems for determining whether a voltage measurement is usable for a state of charge estimation
US20150025823A1 (en) * 2013-07-16 2015-01-22 Stmicroelectronics International N.V. Temperature-compensated state of charge estimation for rechargeable batteries
CN104635165A (en) * 2015-01-27 2015-05-20 合肥工业大学 Accurate estimation method for residual electric quantity of accumulator of photoelectric complementary power supply system
JP2015210182A (en) * 2014-04-25 2015-11-24 カルソニックカンセイ株式会社 Performance estimation device and performance estimation method of lead acid storage battery
JP2019117711A (en) * 2017-12-27 2019-07-18 古河電気工業株式会社 Rechargeable battery liquid reduction detecting device and rechargeable battery liquid reduction detecting method
CN110816366A (en) * 2019-10-31 2020-02-21 上海交通大学 Temperature estimation method, system, medium and equipment suitable for interior of single battery
CN112462283A (en) * 2020-10-19 2021-03-09 江苏大学 Lithium ion battery internal resistance and capacity estimation method based on differential temperature curve
CN113900027A (en) * 2021-09-30 2022-01-07 蜂巢能源科技有限公司 Battery SOC estimation method, device, control unit and computer readable storage medium
CN115704865A (en) * 2021-08-03 2023-02-17 成都极米科技股份有限公司 Battery management method and device, storage medium and electronic equipment

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352968A (en) * 1992-05-28 1994-10-04 Apple Computer, Inc. Battery charge state determination
EP2023153A2 (en) * 2007-07-30 2009-02-11 Mitsumi Electric Co., Ltd. Battery status detecting method and battery status detecting apparatus
US20140172332A1 (en) * 2012-12-18 2014-06-19 GM Global Technology Operations LLC Methods and systems for determining whether a voltage measurement is usable for a state of charge estimation
US20150025823A1 (en) * 2013-07-16 2015-01-22 Stmicroelectronics International N.V. Temperature-compensated state of charge estimation for rechargeable batteries
JP2015210182A (en) * 2014-04-25 2015-11-24 カルソニックカンセイ株式会社 Performance estimation device and performance estimation method of lead acid storage battery
CN104635165A (en) * 2015-01-27 2015-05-20 合肥工业大学 Accurate estimation method for residual electric quantity of accumulator of photoelectric complementary power supply system
JP2019117711A (en) * 2017-12-27 2019-07-18 古河電気工業株式会社 Rechargeable battery liquid reduction detecting device and rechargeable battery liquid reduction detecting method
CN110816366A (en) * 2019-10-31 2020-02-21 上海交通大学 Temperature estimation method, system, medium and equipment suitable for interior of single battery
CN112462283A (en) * 2020-10-19 2021-03-09 江苏大学 Lithium ion battery internal resistance and capacity estimation method based on differential temperature curve
CN115704865A (en) * 2021-08-03 2023-02-17 成都极米科技股份有限公司 Battery management method and device, storage medium and electronic equipment
CN113900027A (en) * 2021-09-30 2022-01-07 蜂巢能源科技有限公司 Battery SOC estimation method, device, control unit and computer readable storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113608138A (en) * 2021-07-30 2021-11-05 东风汽车有限公司东风日产乘用车公司 Storage battery power shortage risk monitoring method, electronic equipment and storage medium

Similar Documents

Publication Publication Date Title
CN108132442B (en) storage battery joint state estimation method based on off-line data driving
CN111060820B (en) Lithium battery SOC and SOP estimation method based on second-order RC model
US10539622B2 (en) Inspection method and manufacturing method for electric power storage device
EP3064952B1 (en) Energy storage device management apparatus, energy storage device management method, energy storage device module, energy storage device management program, and movable body
CN109856542B (en) Calibration method of lithium battery SOC-OCV curve cluster, SOC correction method and device
CN109143097B (en) Lithium ion battery SOC estimation method considering temperature and cycle number
US9891287B2 (en) Temperature-compensated state of charge estimation for rechargeable batteries
CN109444749A (en) Temperature compensation system and method, storage medium for lithium battery capacity measurement
CN115084693A (en) Lithium battery solid-phase concentration correction method and system and storage medium
CN110716141B (en) Battery state of charge estimation method based on extended Kalman filtering
JP2023016707A5 (en)
CN115308616A (en) OCV-SOC calibration and estimation method, device, medium and vehicle
JP2023016707A (en) Method, apparatus and computer program product for calculating loss of capacity of storage battery
KR101160541B1 (en) Method for remaing capacity prediction of battery
CN113075571A (en) Lithium ion battery OCV determining method, device and system
US10884064B2 (en) Inspection apparatus of electrical storage device
CN112213659A (en) Battery capacity correction method and test system
JP2011172415A (en) Secondary battery device
CN111337838B (en) Method for testing SOC-OCV (state of charge-Voltage control Circuit) of ternary lithium ion battery in charging process at low temperature
CN108872867A (en) A kind of self-discharge of battery test method
CN109633451B (en) Energy storage system self-track parameter calibration method and SOC estimation method
WO2023179255A1 (en) Charging device and method, and related equipment
CN110133506B (en) Device and method for calculating remaining service time of lithium battery
JP7056449B2 (en) Inspection device for power storage device
CN116679218A (en) Compensation correction method for lithium ion battery capacity

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination