CN104714182A - Method and system for determining state-of-charge value of battery - Google Patents
Method and system for determining state-of-charge value of battery Download PDFInfo
- Publication number
- CN104714182A CN104714182A CN201310692100.0A CN201310692100A CN104714182A CN 104714182 A CN104714182 A CN 104714182A CN 201310692100 A CN201310692100 A CN 201310692100A CN 104714182 A CN104714182 A CN 104714182A
- Authority
- CN
- China
- Prior art keywords
- state
- battery
- charge
- voltage
- value
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000007599 discharging Methods 0.000 claims abstract description 60
- 230000008569 process Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The embodiment of the invention discloses a method for determining a state-of-charge value of a battery. The method includes the steps that a voltage and state-of-charge value reference query table in the charging state of the battery and a voltage and state-of-charge value reference query table in the discharging state of the battery are obtained; the current state of the battery is detected, open-circuit voltage in the static state is obtained, and the state includes the charging state and the discharging state; when the battery is in the charging state, a value corresponding to the open-circuit voltage is determined according to the voltage and state-of-charge value reference query table in the charging state and serves as a state-of-charge value of the battery; when the battery is in the discharging state, a value corresponding to the open-circuit voltage is determined according to the voltage and state-of-charge value reference query table in the discharging state and serves as a state-of-charge value of the battery. The embodiment of the invention further discloses a system for determining the state-of-charge of the battery. The method and the system are beneficial for correcting the state-of-charge estimation of the battery to achieve the purpose of improving the accuracy of state-of-charge estimation of the battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a method and a system for determining a state of charge value of a battery.
Background
Currently, the state of charge of the battery is estimated by a table lookup correction method. The method adopts a one-to-one correspondence relationship between a state of charge (SOC) and an electromotive force (EMF) to establish a two-dimensional relationship table of the SOC and the EMF. Therefore, a two-dimensional table is consulted by the measured electromotive force (EMF) to obtain a battery state of charge (SOC) value. Because obtaining the electromotive force (EMF) requires an Open-circuit measurement when the battery is in an absolute quiescent state, the measurement is relatively demanding and difficult to obtain, and therefore, the electromotive force (EMF) is often replaced by the Open Circuit Voltage (OCV) of the battery.
According to the method, in a discharging state of a battery, firstly, different battery state of charge (SOC) points are taken and tested respectively to obtain an Open Circuit Voltage (OCV) value in a battery standing state, and a voltage-state of charge value reference lookup table and a voltage-state of charge curve are established according to the battery state of charge (SOC) and the Open Circuit Voltage (OCV).
The inventor finds that the method is only suitable for the battery in a discharge state, and has the following disadvantages: because the voltage-state-of-charge value reference look-up table of the battery is established under the working state that the battery is not distinguished, when the battery is in the charging state, the state of charge of the battery can be determined only by inquiring the voltage-state-of-charge value reference look-up table under the discharging state, and therefore estimation errors of the state of charge value of the battery are caused.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a system for determining a battery state of charge (SOC) value, which can solve the problem of estimation error of the battery SOC value caused by establishing a voltage-SOC value reference look-up table of a battery under the condition that the working state of the battery is not distinguished and determining the battery SOC by inquiring the table in the table look-up correction process of the battery SOC estimation.
In order to solve the above technical problem, an embodiment of the present invention provides a method for determining a state of charge value of a battery, where the method includes:
obtaining a voltage-state-of-charge value reference look-up table of a battery in a charging state and a voltage-state-of-charge value reference look-up table in a discharging state;
detecting the current state of the battery, and obtaining the open-circuit voltage of the battery in a standing state, wherein the state comprises a charging state and a discharging state;
when the current state of the battery is a charging state, determining a battery charge state value corresponding to the open-circuit voltage as the battery charge state value of the battery according to a voltage-charge state value reference look-up table under the charging state;
and when the current state of the battery is a discharging state, determining a battery charge state value corresponding to the open-circuit voltage as the battery charge state value of the battery according to the voltage-charge state value reference look-up table under the discharging state.
The step of obtaining the voltage-state-of-charge value reference look-up table of the battery in the charging state specifically comprises the following steps:
detecting a state of charge of the battery;
when the battery state of charge value is 0, starting charging the battery;
in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the battery state of charge value when the battery is in a standing state until the battery state of charge value is 100, and obtaining a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages;
and drawing a charging curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the charging state according to the charging curve of the voltage-state-of-charge value.
The step of obtaining the voltage-state of charge value reference look-up table of the battery in the discharging state specifically comprises the following steps:
detecting a state of charge of the battery;
when the state of charge value of the battery is 100, measuring the open-circuit voltage of the battery in a standing state, and enabling the battery to start discharging;
in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 0 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages;
and drawing a discharge curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the discharge state according to the discharge curve of the voltage-state-of-charge value.
The embodiment of the invention also provides a system for determining the state of charge value of a battery, which comprises: the device comprises an acquisition unit, a detection unit, a first determination unit and a second determination unit; wherein,
the obtaining unit is used for respectively obtaining a voltage-charge state value reference look-up table of the battery in a charging state and a voltage-charge state value reference look-up table in a discharging state;
the detection unit is used for detecting the current state of the battery and obtaining the open-circuit voltage of the battery in a standing state, wherein the state comprises a charging state and a discharging state;
the first determining unit is configured to determine, when the current state of the battery is a charging state, a battery state of charge value corresponding to the open-circuit voltage as a battery state of charge value of the battery according to a voltage-state of charge value reference look-up table in the charging state;
and the second determining unit is used for determining the battery state of charge value corresponding to the open-circuit voltage as the battery state of charge value of the battery according to the voltage-state of charge value reference look-up table in the discharging state when the current state of the battery is in the discharging state.
Wherein the acquisition unit includes: a first acquisition module and a second acquisition module;
the first acquisition module is used for detecting the state of charge of the battery; when the battery state of charge value is 0, starting charging the battery; in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the battery state of charge value when the battery is in a standing state until the battery state of charge value is 100, and obtaining a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; drawing a charging curve of a voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the charging state according to the charging curve of the voltage-state-of-charge value;
the second acquisition module is used for detecting the state of charge of the battery; when the state of charge value of the battery is 100, measuring the open-circuit voltage of the battery in a standing state, and enabling the battery to start discharging; in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 0 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; and drawing a discharge curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the discharge state according to the discharge curve of the voltage-state-of-charge value.
In the embodiment of the invention, when the state of charge of the battery is estimated by using a table look-up correction method, the voltage-state-of-charge value reference look-up tables of the battery in a charging state and a discharging state are respectively obtained, then the current state of the battery is judged, and the voltage-state-of-charge value reference look-up tables of the battery in a corresponding state are inquired according to the state of the battery and the open-circuit voltage measured by the battery in a standing state to determine the corresponding battery state-of-charge value. The embodiment of the invention is beneficial to correcting the estimation of the state of charge of the battery and achieves the aim of improving the estimation precision of the state of charge of the battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a graph of OCV-SOC during battery charging and discharging;
FIG. 2 is a graph showing a distribution of OCV variation during charging and discharging of a battery;
FIG. 3 is a flowchart of a method for determining a state of charge value of a battery according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a system for determining a state of charge value of a battery according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the acquisition unit in fig. 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The two-dimensional relationship table in the conventional table look-up correction method is usually established without distinguishing the working state (whether the battery is in a charging state or a discharging state) of the battery, so that the working state of the battery is not distinguished during query, and therefore, errors exist in estimation of the state of charge of the battery. The disadvantages of this method are: first, because the table obtaining method uses to obtain the state of charge (SOC) values of each battery and the corresponding Open Circuit Voltage (OCV) through discharging in sequence, and neglects the Open Circuit Voltage (OCV) corresponding to each state of charge (SOC) value obtained if the battery is in a charged state, there is a difference between the Open Circuit Voltages (OCV) corresponding to two operating states of the battery at the same state of charge (SOC) value, and this difference is called "charge-discharge hysteresis", as shown in fig. 1, where curve 1 is the charged state and curve 2 is the discharged state; secondly, because the operating state of the battery is not distinguished before table lookup, there is an error in the acquired state of charge of the battery, for example: it can be found by looking up the table that the Open Circuit Voltage (OCV) can differ by 17mv at the maximum for the same battery state of charge (SOC) value, as shown in fig. 2.
In an embodiment of the present invention, therefore, a method for determining a state of charge value of a battery is provided, as shown in fig. 3, the method includes the following steps:
step S301, obtaining a voltage-state-of-charge value reference look-up table of a battery in a charging state and a voltage-state-of-charge value reference look-up table in a discharging state;
when the state of charge of the battery is estimated by using a table look-up correction method, a voltage-state of charge value reference look-up table of the battery in a charging state and a discharging state is obtained.
In the process of obtaining the voltage-state-of-charge value reference look-up table in the charging state, firstly detecting the state-of-charge of the battery, and when the state-of-charge value of the battery is 0 (namely the SOC is 0%), starting charging the battery; secondly, in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the increase of the state of charge value of the battery under the static state of the battery until the state of charge value of the battery is 100 (namely SOC is 100 percent), and obtaining a plurality of state of charge values of the battery and a plurality of corresponding open-circuit voltages; and finally, drawing a charging curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and the plurality of corresponding open-circuit voltages, and obtaining a voltage-state-of-charge value reference look-up table of the corresponding battery in the charging state according to the charging curve of the voltage-state-of-charge value. The numerical value is a positive number, may be a fixed numerical value, or may be a variable numerical value, but the magnitude of the numerical value should not exceed 10, and the smaller the magnitude, the better.
For example: step a, detecting the state of charge of the battery, and when the SOC is 0%, starting charging the battery; step b, charging to SOC of certain interval with small current1Point, record OCV after standing1A value; step c, charging to SOC of the same interval (or different intervals) with small current2Point, record OCV after standing2A value; repeating the above steps and recording SOCnAnd OCVnValue until the battery is fully charged, i.e. SOC is 100%; and establishing a related two-dimensional reference lookup table and curve for all the obtained SOC values and OCV values, namely, the voltage-state-of-charge value reference lookup table and curve of the battery in the charging state. The SOC interval point can be selected at will, and the smaller the SOC interval point, the better the SOC interval point.
In the process of obtaining the voltage-state-of-charge value reference look-up table in the discharging state, firstly detecting the state of charge of the battery, when the state of charge value of the battery is 100 (namely the SOC is 100%), measuring the open-circuit voltage of the battery in the standing state at the moment, and enabling the battery to start discharging; secondly, in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the static state of the battery until the state of charge value of the battery is 0 (namely SOC is 0 percent), and obtaining a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; and finally, drawing a discharge curve of the voltage-charge state value according to the plurality of battery charge state values and the plurality of corresponding open-circuit voltages, and obtaining a voltage-charge state value reference look-up table of the corresponding battery in the discharge state according to the discharge curve of the voltage-charge state value. The numerical value is a positive number, may be a fixed numerical value, or may be a variable numerical value, but the magnitude of the numerical value should not exceed 10, and the smaller the magnitude, the better.
For example: step a, detecting the state of charge of the battery, and when the SOC is 100%, measuring the open-circuit voltage of the battery in a standing state at the moment and enabling the battery to start discharging; step b, discharging to SOC of certain interval with small current1Point, record OCV after standing1A value; step c, discharging to SOC with same interval (or different interval) at low current2Point, record OCV after standing2A value; repeating the above steps and recording SOCnAnd OCVnValue until the battery is discharged to a SOC of 0%; and establishing a related two-dimensional reference lookup table and curve for all the obtained SOC values and OCV values, namely, the voltage-state-of-charge value reference lookup table and curve of the battery in the discharging state. The SOC interval point can be selected at will, and the smaller the SOC interval point, the better the SOC interval point.
Step S302, detecting the current state of the battery, and obtaining the open-circuit voltage of the battery in the static state, wherein the state comprises a charging state and a discharging state.
Step S303, when the current state of the battery is a charging state, determining a battery state of charge value corresponding to the open-circuit voltage as the battery state of charge value of the battery according to a voltage-state of charge value reference look-up table under the charging state;
when the current state of the battery is the charging state, according to the OCV value obtained in step 302, the SOC value corresponding to the OCV value is looked up in the voltage-state-of-charge value reference look-up table in the charging state, and the looked-up SOC value corresponding to the OCV value is used as the current SOC value.
Step S304, when the current state of the battery is a discharging state, determining a battery charge state value corresponding to the open-circuit voltage as the battery charge state value of the battery according to a voltage-charge state value reference look-up table under the discharging state;
when the current state of the battery is a discharging state, according to the OCV value obtained in step 302, the SOC value corresponding to the OCV value is looked up in the voltage-state-of-charge value reference look-up table in the discharging state, and the looked-up SOC value corresponding to the OCV value is used as the current SOC value.
In the embodiment of the invention, when the state of charge of the battery is estimated by using a table look-up correction method, the voltage-state-of-charge value reference look-up tables of the battery in a charging state and a discharging state are respectively obtained, then the current state of the battery is judged, and the voltage-state-of-charge value reference look-up tables of the battery in a corresponding state are inquired according to the state of the battery and the open-circuit voltage measured by the battery in a standing state to determine the corresponding battery state-of-charge value. The embodiment of the invention is beneficial to correcting the estimation of the state of charge of the battery and achieves the aim of improving the estimation precision of the state of charge of the battery.
As shown in fig. 4, in an embodiment of the present invention, a system for determining a state of charge value of a battery is further provided, where the system includes: an acquisition unit 410, a detection unit 420, a first determination unit 430, and a second determination unit 440; wherein,
an obtaining unit 410, configured to obtain a voltage-state-of-charge value reference look-up table of a battery in a charging state and a voltage-state-of-charge value reference look-up table in a discharging state;
the detection unit 420 is used for detecting the current state of the battery and obtaining the open-circuit voltage of the battery in a standing state, wherein the state comprises a charging state and a discharging state;
a first determining unit 430, configured to determine, when the current state of the battery is a charging state, a battery state of charge value corresponding to the open-circuit voltage as the battery state of charge value of the battery according to a voltage-state of charge value reference lookup table in the charging state;
a second determining unit 440, configured to determine, when the current state of the battery is a discharging state, a battery state of charge value corresponding to the open-circuit voltage as the battery state of charge value of the battery according to the voltage-state of charge value reference lookup table in the discharging state.
Further, the obtaining unit 410 includes: a first acquisition module 4101 and a second acquisition module 4102;
a first acquisition module 4101 for detecting a state of charge of the battery; when the state of charge value of the battery is 0, starting charging the battery; in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the increase of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 100 to obtain a plurality of state of charge values of the battery and a plurality of corresponding open-circuit voltages; drawing a charging curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a voltage-state-of-charge value reference look-up table of the corresponding battery in the charging state according to the charging curve of the voltage-state-of-charge value;
a second acquisition module 4102 for detecting the state of charge of the battery; when the state of charge value of the battery is 100, measuring the open-circuit voltage of the battery in a standing state, and enabling the battery to start discharging; in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 0 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; and drawing a discharge curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and the plurality of corresponding open-circuit voltages, and obtaining a voltage-state-of-charge value reference look-up table of the corresponding battery in the discharge state according to the discharge curve of the voltage-state-of-charge value.
In the embodiment of the present invention, the system for determining the state of charge of the battery first obtains a voltage-state of charge reference look-up table of the battery in the charging state and a voltage-state of charge reference look-up table of the battery in the discharging state in the obtaining unit 410; secondly, detecting the current state of the battery through a detection unit 420, determining the current state of the battery, and obtaining the open-circuit voltage of the battery in a standing state; then, the current state of the battery is determined, when the current state of the battery is the charging state, the battery state of charge value corresponding to the open-circuit voltage is determined as the battery state of charge value of the battery in the first determining unit 430 according to the voltage-state of charge value reference look-up table under the charging state, otherwise, the battery state of charge value corresponding to the open-circuit voltage is determined as the battery state of charge value of the battery in the second determining unit 440 according to the voltage-state of charge value reference look-up table under the discharging state.
It should be noted that, in the foregoing system embodiment, each included system unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A method of determining a state of charge value for a battery, the method comprising the steps of:
obtaining a voltage-state-of-charge value reference look-up table of a battery in a charging state and a voltage-state-of-charge value reference look-up table in a discharging state;
detecting the current state of the battery, and obtaining the open-circuit voltage of the battery in a standing state, wherein the state comprises a charging state and a discharging state;
when the current state of the battery is a charging state, determining a battery charge state value corresponding to the open-circuit voltage as the battery charge state value of the battery according to a voltage-charge state value reference look-up table under the charging state;
and when the current state of the battery is a discharging state, determining a battery charge state value corresponding to the open-circuit voltage as the battery charge state value of the battery according to the voltage-charge state value reference look-up table under the discharging state.
2. The method of claim 1, wherein the step of obtaining the reference look-up table of the voltage-state-of-charge values of the battery at the state-of-charge is embodied as:
detecting a state of charge of the battery;
when the battery state of charge value is 0, starting charging the battery;
in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the battery state of charge value when the battery is in a standing state until the battery state of charge value is 100, and obtaining a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages;
and drawing a charging curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the charging state according to the charging curve of the voltage-state-of-charge value.
3. The method according to claim 1, wherein the step of obtaining the reference look-up table of the voltage-state-of-charge values of the battery in the discharging state comprises:
detecting a state of charge of the battery;
when the state of charge value of the battery is 100, measuring the open-circuit voltage of the battery in a standing state, and enabling the battery to start discharging;
in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 0 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages;
and drawing a discharge curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the discharge state according to the discharge curve of the voltage-state-of-charge value.
4. A system for a method of determining a state of charge value of a battery, the system comprising: the device comprises an acquisition unit, a detection unit, a first determination unit and a second determination unit; wherein,
the acquisition unit is used for acquiring a voltage-state-of-charge value reference look-up table of the battery in a charging state and a voltage-state-of-charge value reference look-up table in a discharging state;
the detection unit is used for detecting the current state of the battery and obtaining the open-circuit voltage of the battery in a standing state, wherein the state comprises a charging state and a discharging state;
the first determining unit is configured to determine, when the current state of the battery is a charging state, a battery state of charge value corresponding to the open-circuit voltage as a battery state of charge value of the battery according to a voltage-state of charge value reference look-up table in the charging state;
and the second determining unit is used for determining the battery state of charge value corresponding to the open-circuit voltage as the battery state of charge value of the battery according to the voltage-state of charge value reference look-up table in the discharging state when the current state of the battery is in the discharging state.
5. The system of claim 4, wherein the acquisition unit comprises: a first acquisition module and a second acquisition module;
the first acquisition module is used for detecting the state of charge of the battery; when the battery state of charge value is 0, starting charging the battery; in the charging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the increase of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 100 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; drawing a charging curve of a voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the charging state according to the charging curve of the voltage-state-of-charge value;
the second acquisition module is used for detecting the state of charge of the battery; when the state of charge value of the battery is 100, measuring the open-circuit voltage of the battery in a standing state, and enabling the battery to start discharging; in the discharging process of the battery, respectively measuring each open-circuit voltage corresponding to each numerical value of the reduction of the state of charge value of the battery under the standing state of the battery until the state of charge value of the battery is 0 to obtain a plurality of battery state of charge values and a plurality of corresponding open-circuit voltages; and drawing a discharge curve of the voltage-state-of-charge value according to the plurality of battery state-of-charge values and a plurality of corresponding open-circuit voltages, and obtaining a corresponding reference look-up table of the voltage-state-of-charge value of the battery in the discharge state according to the discharge curve of the voltage-state-of-charge value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310692100.0A CN104714182A (en) | 2013-12-11 | 2013-12-11 | Method and system for determining state-of-charge value of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310692100.0A CN104714182A (en) | 2013-12-11 | 2013-12-11 | Method and system for determining state-of-charge value of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104714182A true CN104714182A (en) | 2015-06-17 |
Family
ID=53413674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310692100.0A Pending CN104714182A (en) | 2013-12-11 | 2013-12-11 | Method and system for determining state-of-charge value of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104714182A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223515A (en) * | 2015-10-13 | 2016-01-06 | 中国第一汽车股份有限公司 | A kind of lithium-ion-power cell charge state estimation method |
| CN106405421A (en) * | 2015-07-27 | 2017-02-15 | 中兴通讯股份有限公司 | Battery state-of-charge (SOC) value evaluation method and device |
| CN106707187A (en) * | 2016-12-26 | 2017-05-24 | 宁德时代新能源科技股份有限公司 | Method and device for determining target SOC of battery |
| CN106802394A (en) * | 2017-02-06 | 2017-06-06 | 清华大学深圳研究生院 | The modification method and device of automobile batteries state-of-charge |
| CN107064814A (en) * | 2017-03-22 | 2017-08-18 | 北京长城华冠汽车科技股份有限公司 | A kind of method for transformation and device of charge states of lithium ion battery curve |
| CN108535652A (en) * | 2018-02-07 | 2018-09-14 | 丽水博远科技有限公司 | Method based on charging response measurement rechargeable battery remaining capacity |
| CN109856542A (en) * | 2018-10-23 | 2019-06-07 | 许继集团有限公司 | A kind of scaling method of lithium battery SOC-OCV set of curves, SOC bearing calibration and device |
| CN110031768A (en) * | 2019-03-26 | 2019-07-19 | 清华大学 | Lithium ion battery can electricity capacity determine that method and state of charge determine method |
| CN110927580A (en) * | 2019-11-05 | 2020-03-27 | 深圳市科陆电子科技股份有限公司 | SOC deviation correction method, device, terminal and storage medium |
| CN111416398A (en) * | 2019-01-08 | 2020-07-14 | 太普动力新能源(常熟)股份有限公司 | Method for processing relative state of charge of rechargeable battery |
| CN111929603A (en) * | 2020-07-14 | 2020-11-13 | 东风时代(武汉)电池系统有限公司 | Battery monomer self-discharge measuring and calculating method and device and computer readable storage medium |
| WO2020259008A1 (en) * | 2019-06-24 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | State of charge correction method, device and system for battery, and storage medium |
| CN112557905A (en) * | 2019-09-25 | 2021-03-26 | 比亚迪股份有限公司 | Battery pack, data processing method thereof, computer device, medium, and vehicle |
| CN113156314A (en) * | 2021-04-16 | 2021-07-23 | 东风汽车集团股份有限公司 | Method for measuring and calculating service life attenuation of whole-vehicle-level power battery |
| WO2023039826A1 (en) * | 2021-09-17 | 2023-03-23 | 华为数字能源技术有限公司 | Control method, control apparatus and electronic device |
| CN116819346A (en) * | 2023-08-29 | 2023-09-29 | 深圳凌奈智控有限公司 | Battery SOC estimation method, device, equipment and storage medium |
| CN118465553A (en) * | 2024-04-30 | 2024-08-09 | 中国长江三峡集团有限公司 | State of charge estimation method, device, equipment and medium of sodium ion battery |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909280A (en) * | 2005-07-29 | 2007-02-07 | 三星Sdi株式会社 | Battery management system and driving method thereof |
| CN101430366A (en) * | 2008-12-12 | 2009-05-13 | 苏州金百合电子科技有限公司 | Battery charge state detection method |
| CN101627517A (en) * | 2007-03-06 | 2010-01-13 | 丰田自动车株式会社 | Electric vehicle, method for estimating state of charge, and computer readable recording medium recording program for executing state of charge estimation method on computer |
| CN102033204A (en) * | 2009-09-30 | 2011-04-27 | 凹凸电子（武汉）有限公司 | Battery power detection circuit, method and electronic system |
| CN102116846A (en) * | 2011-01-04 | 2011-07-06 | 武汉理工大学 | Method for measuring energy efficiencies of storage batteries |
| CN102565718A (en) * | 2012-01-18 | 2012-07-11 | 杭州高特电子设备有限公司 | Method for judging state of charge (SOC) of lithium battery based on rising and dropping of open-circuit voltage |
| CN102645635A (en) * | 2012-03-31 | 2012-08-22 | 惠州市亿能电子有限公司 | Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC) |
| CN102998623A (en) * | 2011-09-14 | 2013-03-27 | 北汽福田汽车股份有限公司 | Method and system of online estimation for battery state of charge |
| 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) |
-
2013
- 2013-12-11 CN CN201310692100.0A patent/CN104714182A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909280A (en) * | 2005-07-29 | 2007-02-07 | 三星Sdi株式会社 | Battery management system and driving method thereof |
| CN101627517A (en) * | 2007-03-06 | 2010-01-13 | 丰田自动车株式会社 | Electric vehicle, method for estimating state of charge, and computer readable recording medium recording program for executing state of charge estimation method on computer |
| CN101430366A (en) * | 2008-12-12 | 2009-05-13 | 苏州金百合电子科技有限公司 | Battery charge state detection method |
| CN102033204A (en) * | 2009-09-30 | 2011-04-27 | 凹凸电子（武汉）有限公司 | Battery power detection circuit, method and electronic system |
| CN102116846A (en) * | 2011-01-04 | 2011-07-06 | 武汉理工大学 | Method for measuring energy efficiencies of storage batteries |
| CN102998623A (en) * | 2011-09-14 | 2013-03-27 | 北汽福田汽车股份有限公司 | Method and system of online estimation for battery state of charge |
| CN102565718A (en) * | 2012-01-18 | 2012-07-11 | 杭州高特电子设备有限公司 | Method for judging state of charge (SOC) of lithium battery based on rising and dropping of open-circuit voltage |
| CN102645635A (en) * | 2012-03-31 | 2012-08-22 | 惠州市亿能电子有限公司 | Device and method for testing corresponding relation between open circuit voltage (OCV) and system on chip (SOC) |
| 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) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405421A (en) * | 2015-07-27 | 2017-02-15 | 中兴通讯股份有限公司 | Battery state-of-charge (SOC) value evaluation method and device |
| CN105223515A (en) * | 2015-10-13 | 2016-01-06 | 中国第一汽车股份有限公司 | A kind of lithium-ion-power cell charge state estimation method |
| CN106707187A (en) * | 2016-12-26 | 2017-05-24 | 宁德时代新能源科技股份有限公司 | Method and device for determining target SOC of battery |
| CN106802394A (en) * | 2017-02-06 | 2017-06-06 | 清华大学深圳研究生院 | The modification method and device of automobile batteries state-of-charge |
| CN106802394B (en) * | 2017-02-06 | 2020-05-22 | 清华大学深圳研究生院 | Method and device for correcting charge state of automobile battery |
| CN107064814A (en) * | 2017-03-22 | 2017-08-18 | 北京长城华冠汽车科技股份有限公司 | A kind of method for transformation and device of charge states of lithium ion battery curve |
| CN107064814B (en) * | 2017-03-22 | 2019-07-19 | 北京长城华冠汽车科技股份有限公司 | A kind of method for transformation and device of charge states of lithium ion battery curve |
| CN108535652A (en) * | 2018-02-07 | 2018-09-14 | 丽水博远科技有限公司 | Method based on charging response measurement rechargeable battery remaining capacity |
| CN108535652B (en) * | 2018-02-07 | 2020-11-03 | 丽水博远科技有限公司 | Method for measuring residual capacity of rechargeable battery based on charging response |
| CN109856542A (en) * | 2018-10-23 | 2019-06-07 | 许继集团有限公司 | A kind of scaling method of lithium battery SOC-OCV set of curves, SOC bearing calibration and device |
| CN109856542B (en) * | 2018-10-23 | 2021-01-05 | 许继集团有限公司 | Calibration method of lithium battery SOC-OCV curve cluster, SOC correction method and device |
| CN111416398A (en) * | 2019-01-08 | 2020-07-14 | 太普动力新能源(常熟)股份有限公司 | Method for processing relative state of charge of rechargeable battery |
| CN111416398B (en) * | 2019-01-08 | 2023-11-14 | 太普动力新能源(常熟)股份有限公司 | Method for correcting relative charge state of rechargeable battery |
| CN110031768A (en) * | 2019-03-26 | 2019-07-19 | 清华大学 | Lithium ion battery can electricity capacity determine that method and state of charge determine method |
| CN110031768B (en) * | 2019-03-26 | 2020-06-16 | 清华大学 | Method for determining available electric capacity and state of charge value of lithium ion battery |
| WO2020259008A1 (en) * | 2019-06-24 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | State of charge correction method, device and system for battery, and storage medium |
| US11231467B2 (en) | 2019-06-24 | 2022-01-25 | Contemporary Amperex Technology Co., Limited | Method, device, and system, for state of charge (SOC) correction for a battery |
| CN112557905A (en) * | 2019-09-25 | 2021-03-26 | 比亚迪股份有限公司 | Battery pack, data processing method thereof, computer device, medium, and vehicle |
| CN112557905B (en) * | 2019-09-25 | 2021-12-07 | 比亚迪股份有限公司 | Battery pack, data processing method thereof, computer device, medium, and vehicle |
| CN110927580A (en) * | 2019-11-05 | 2020-03-27 | 深圳市科陆电子科技股份有限公司 | SOC deviation correction method, device, terminal and storage medium |
| CN111929603A (en) * | 2020-07-14 | 2020-11-13 | 东风时代(武汉)电池系统有限公司 | Battery monomer self-discharge measuring and calculating method and device and computer readable storage medium |
| CN113156314A (en) * | 2021-04-16 | 2021-07-23 | 东风汽车集团股份有限公司 | Method for measuring and calculating service life attenuation of whole-vehicle-level power battery |
| WO2023039826A1 (en) * | 2021-09-17 | 2023-03-23 | 华为数字能源技术有限公司 | Control method, control apparatus and electronic device |
| CN116819346A (en) * | 2023-08-29 | 2023-09-29 | 深圳凌奈智控有限公司 | Battery SOC estimation method, device, equipment and storage medium |
| CN116819346B (en) * | 2023-08-29 | 2023-11-07 | 深圳凌奈智控有限公司 | Battery SOC estimation method, device, equipment and storage medium |
| CN118465553A (en) * | 2024-04-30 | 2024-08-09 | 中国长江三峡集团有限公司 | State of charge estimation method, device, equipment and medium of sodium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104714182A (en) | Method and system for determining state-of-charge value of battery | |
| CN104714181B (en) | It is a kind of to obtain voltage and the method and system of battery charge state relation | |
| CN108828461B (en) | Power battery SOH value estimation method and system | |
| KR101500128B1 (en) | Degradation estimation method for high voltage battery | |
| US10386420B2 (en) | Secondary battery degradation determination method and secondary battery degradation determination device | |
| CN105938181B (en) | Storage element management device, management method, module, recording medium, and moving object | |
| US8521458B2 (en) | Apparatus and method for detecting charged state of electric storage device | |
| US9759776B2 (en) | Battery cell state-of-health estimation method | |
| WO2017119393A1 (en) | State estimation device and state estimation method | |
| CN106646256B (en) | Battery capacity calculating method | |
| KR20160004077A (en) | Method and apparatus for estimating state of battery | |
| KR101758408B1 (en) | Device and method for determining a range of a battery characteristic curve | |
| JP5225186B2 (en) | Charge control circuit and battery charger provided with the charge control circuit | |
| JP5255119B2 (en) | Battery charge rate calculation device | |
| US9599676B2 (en) | Apparatus and method for estimating power storage device degradation | |
| CN111707955B (en) | Method, apparatus and medium for estimating remaining life of battery | |
| JP2013120185A (en) | Vehicular high-voltage battery deterioration determination method | |
| JP6183336B2 (en) | Charge rate calculation device | |
| CN104950263A (en) | Estimation method for SOC of automobile power battery | |
| CN112858924A (en) | Method and device for estimating residual energy of power battery, vehicle and storage medium | |
| CN106443498A (en) | Detection method and detection device for battery pack | |
| CN110687458A (en) | Terminal battery electric quantity determination method and device | |
| US20180100899A1 (en) | State-of-charge indication system and related method | |
| CN113933728A (en) | Method for calibrating static SOC (State of Charge) by using SOC-OCV (State of Charge) -OCV (open Circuit Voltage) curve of lithium iron phosphate battery | |
| CN112394290B (en) | Method, device, computer equipment and storage medium for estimating SOH of battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150617 |
|
| RJ01 | Rejection of invention patent application after publication |