CN110426638B - Method and system for rapidly calculating open-circuit voltage of battery - Google Patents
Method and system for rapidly calculating open-circuit voltage of battery Download PDFInfo
- Publication number
- CN110426638B CN110426638B CN201910787890.8A CN201910787890A CN110426638B CN 110426638 B CN110426638 B CN 110426638B CN 201910787890 A CN201910787890 A CN 201910787890A CN 110426638 B CN110426638 B CN 110426638B
- Authority
- CN
- China
- Prior art keywords
- circuit voltage
- current
- battery
- open
- calculating
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- 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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
-
- 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
Abstract
The invention discloses a method for quickly calculating the open-circuit voltage of a battery, which comprises the steps of iteratively calculating the open-circuit voltage parameter according to the terminal voltage of the battery until the current of a load connected with the battery is not less than a preset threshold; and calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter. The invention rapidly extracts open-circuit voltage by analyzing and calculating the sampling data of the battery terminal voltage, the load current and the like, avoids complex operation flows such as long-time standing and the like, and is simple, efficient and easy to operate.
Description
Technical Field
The invention relates to a method and a system for quickly calculating open-circuit voltage of a battery, and belongs to the technical field of new energy and electric power energy storage.
Background
The open-circuit voltage is an important characteristic quantity of the energy storage battery and is closely related to links such as state of charge (SOC) calculation, state of health (SOH) analysis, battery management and the like. At present, the conventional acquisition method is mainly a standing method, i.e. after the battery stops charging and discharging, the battery waits for a period of time, and then an instrument is used for measuring the terminal voltage of the battery. The method has long standing time, usually more than 2 hours, and low operation efficiency.
Disclosure of Invention
The invention provides a method and a system for quickly calculating the open-circuit voltage of a battery, which solve the problem of low operation efficiency of the existing method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for rapidly calculating the open-circuit voltage of a battery comprises the following steps,
iteratively calculating an open-circuit voltage parameter according to the voltage of the battery terminal until the current of a load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold;
and calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter.
The process of iteratively calculating the open circuit voltage calculation parameter is,
1) collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2Load current at the moment k, the moment k-1 and the moment k-2 are respectively, and k is the current moment;
2) if Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to the step 3;
if Ik、Ik-1、Ik-2If the current values are not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished;
3) according to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2Battery terminal voltages at time k, time k-1 and time k-2, respectively;
4) and k is k +1, and the step 1 is carried out.
A specific calculation formula of the open circuit voltage parameter is as follows,
wherein A is1～A9As an open circuit voltage parameter of the current cycle, A1′～A9' is the open circuit voltage parameter obtained from the previous cycle.
The open-circuit voltage of the battery is calculated by the formula,
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
A fast calculation system for open circuit voltage of battery comprises,
an iteration module: iteratively calculating an open-circuit voltage parameter according to the voltage of the battery terminal until the current of a load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold;
a voltage calculation module: and calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter.
The iteration module comprises a module for performing iteration on the received data,
the current acquisition module: collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2Load current at the moment k, the moment k-1 and the moment k-2 are respectively, and k is the current moment;
a judging module: if Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to a parameter calculation module; if Ik、Ik-1、Ik-2If the current values are not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished;
a parameter calculation module: according to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2Battery terminal voltages at time k, time k-1 and time k-2, respectively;
a clock module: and k is k +1, and the current is transferred to a current acquisition module.
The formula for calculating the open circuit voltage parameter in the parameter calculation module is as follows,
wherein A is1～A9As an open circuit voltage parameter of the current cycle, A1′～A9' is the open circuit voltage parameter obtained from the previous cycle.
The formula for calculating the open-circuit voltage of the battery in the voltage calculation module is as follows,
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a method of fast calculation of a battery open circuit voltage.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a method of fast calculation of a battery open circuit voltage.
The invention achieves the following beneficial effects: the invention rapidly extracts open-circuit voltage by analyzing and calculating the sampling data of the battery terminal voltage, the load current and the like, avoids complex operation flows such as long-time standing and the like, and is simple, efficient and easy to operate.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a method for rapidly calculating the open-circuit voltage of a battery includes the following steps:
A1) and iteratively calculating the open-circuit voltage parameter according to the battery terminal voltage until the current of the load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold.
The specific process of A1 is as follows:
1) setting a current threshold IjudgeIteration threshold ajudgeAnd initializing an open-circuit voltage parameter, namely setting the open-circuit voltage parameter to be 0.
2) Collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2The load current is respectively at the moment k, the moment k-1 and the moment k-2, and k is the current moment.
3) If Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to the step 4;
if Ik、Ik-1、Ik-2Not all less than a predetermined current threshold (mainly, whether the current load current is greater than the predetermined current threshold) and the number of iterations is less than the predetermined threshold (here, the parameter A is used)6And judging threshold AjudgeComparison), the iterative calculation is not sufficient, and recalculation is needed;
if Ik、Ik-1、Ik-2If the current is not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished.
4) According to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2The battery terminal voltages at time k, time k-1 and time k-2, respectively.
The specific calculation formula of the open-circuit voltage parameter is as follows:
wherein A is1～A9As an open circuit voltage parameter of the current cycle, A1′～A9' is the open circuit voltage parameter obtained from the previous cycle.
4) And k is k +1, and the step 2 is carried out.
A2) And calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter.
The battery open-circuit voltage calculation formula is as follows:
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
The method can be used for rapidly extracting the open-circuit voltage by analyzing and calculating the sampling data such as the battery terminal voltage, the load current and the like, avoiding the complex operation processes such as long-time standing and the like, and being simple, efficient and easy to operate.
A fast calculation system for battery open circuit voltage, comprising:
an iteration module: and iteratively calculating the open-circuit voltage parameter according to the battery terminal voltage until the current of the load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold.
The iteration module comprises:
the current acquisition module: collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2Load current at the moment k, the moment k-1 and the moment k-2 are respectively, and k is the current moment;
a judging module: if Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to a parameter calculation module; if Ik、Ik-1、Ik-2If the current values are not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished;
a parameter calculation module: according to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2Battery terminal voltages at time k, time k-1 and time k-2, respectively;
the formula for calculating the open circuit voltage parameter in the parameter calculation module is as follows,
wherein A is1～A9As an open circuit voltage parameter of the current cycle, A1′～A9' is an open circuit voltage parameter obtained in the previous period;
a clock module: and k is k +1, and the current is transferred to a current acquisition module.
A voltage calculation module: and calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter.
The formula for calculating the open-circuit voltage of the battery in the voltage calculation module is as follows,
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause a method of fast calculation of a computing device battery open circuit voltage.
A computing device comprising one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a method of fast calculation of a battery open circuit voltage.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (4)
1. A method for quickly calculating the open-circuit voltage of a battery is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
iteratively calculating an open-circuit voltage parameter according to the voltage of the battery terminal until the current of a load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold;
the process of iteratively calculating the open circuit voltage calculation parameter is,
1) collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2Load current at the moment k, the moment k-1 and the moment k-2 are respectively, and k is the current moment;
2) if Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to the step 3;
if Ik、Ik-1、Ik-2If the current values are not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished;
3) according to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2Battery terminal voltages at time k, time k-1 and time k-2, respectively;
4) k is k +1, and go to step 1;
a specific calculation formula of the open circuit voltage parameter is as follows,
wherein A is1～A9As an open circuit voltage parameter of the current cycle, A1′～A9' is an open circuit voltage parameter obtained in the previous period;
calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter;
the open-circuit voltage of the battery is calculated by the formula,
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
2. A quick calculation system for battery open circuit voltage is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
an iteration module: iteratively calculating an open-circuit voltage parameter according to the voltage of the battery terminal until the current of a load connected with the battery is not less than a preset current threshold and the iteration times are not less than a preset iteration threshold;
the iteration module comprises a module for performing iteration on the received data,
the current acquisition module: collecting load current Ik、Ik-1、Ik-2(ii) a Wherein, Ik、Ik-1、Ik-2Load current at the moment k, the moment k-1 and the moment k-2 are respectively, and k is the current moment;
a judging module: if Ik、Ik-1、Ik-2If the current values are less than the preset current threshold, acquiring the terminal voltage U of the batteryk、Uk-1、Uk-2Turning to a parameter calculation module; if Ik、Ik-1、Ik-2If the current values are not less than the preset current threshold and the iteration times are not less than the preset iteration threshold, the iteration is finished;
a parameter calculation module: according to Uk、Uk-1、Uk-2Calculating the open circuit voltage parameter of the current period according to the open circuit voltage parameter obtained in the previous period; wherein U isk、Uk-1、Uk-2Battery terminal voltages at time k, time k-1 and time k-2, respectively;
a clock module: k is k +1, and the current is transferred to a current acquisition module;
the formula for calculating the open circuit voltage parameter in the parameter calculation module is as follows,
wherein A is1～A9Is the open circuit voltage parameter of the current cycle, A'1～A′9An open circuit voltage parameter obtained for a previous cycle;
a voltage calculation module: calculating the open-circuit voltage of the battery according to the open-circuit voltage parameter;
the formula for calculating the open-circuit voltage of the battery in the voltage calculation module is as follows,
OCV＝-m4/(m1+m2+m3)
wherein the content of the first and second substances,
OCV is the battery open circuit voltage.
3. A computer readable storage medium storing one or more programs, characterized in that: the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform the method of claim 1.
4. A computing device, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing the method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787890.8A CN110426638B (en) | 2019-08-26 | 2019-08-26 | Method and system for rapidly calculating open-circuit voltage of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910787890.8A CN110426638B (en) | 2019-08-26 | 2019-08-26 | Method and system for rapidly calculating open-circuit voltage of battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110426638A CN110426638A (en) | 2019-11-08 |
| CN110426638B true CN110426638B (en) | 2021-04-16 |
Family
ID=68417425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910787890.8A Active CN110426638B (en) | 2019-08-26 | 2019-08-26 | Method and system for rapidly calculating open-circuit voltage of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110426638B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817451A (en) * | 2017-11-24 | 2018-03-20 | 北京机械设备研究所 | Discrimination method, system and the storage medium of electrokinetic cell model on-line parameter |
| CN109164392A (en) * | 2018-08-22 | 2019-01-08 | 清华大学深圳研究生院 | A kind of SOC estimation method of power battery |
| CN109239608A (en) * | 2018-08-10 | 2019-01-18 | 安徽力高新能源技术有限公司 | A kind of method of real-time amendment lithium battery SOC-OCV curve |
| CN110045286A (en) * | 2019-03-21 | 2019-07-23 | 江苏大学 | A kind of battery open circuit voltage evaluation method and device based on air-or liquid-operated mechanical model |
| CN110133524A (en) * | 2019-04-19 | 2019-08-16 | 顺丰科技有限公司 | Battery state of charge calculation method, device, server and medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101866073B1 (en) * | 2016-10-19 | 2018-06-08 | 현대자동차주식회사 | Method for predicting State of Health of Battery |
| CN109946623B (en) * | 2019-03-27 | 2020-02-18 | 吉林大学 | SOC (State of Charge) online estimation method for lithium battery |
-
2019
- 2019-08-26 CN CN201910787890.8A patent/CN110426638B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817451A (en) * | 2017-11-24 | 2018-03-20 | 北京机械设备研究所 | Discrimination method, system and the storage medium of electrokinetic cell model on-line parameter |
| CN109239608A (en) * | 2018-08-10 | 2019-01-18 | 安徽力高新能源技术有限公司 | A kind of method of real-time amendment lithium battery SOC-OCV curve |
| CN109164392A (en) * | 2018-08-22 | 2019-01-08 | 清华大学深圳研究生院 | A kind of SOC estimation method of power battery |
| CN110045286A (en) * | 2019-03-21 | 2019-07-23 | 江苏大学 | A kind of battery open circuit voltage evaluation method and device based on air-or liquid-operated mechanical model |
| CN110133524A (en) * | 2019-04-19 | 2019-08-16 | 顺丰科技有限公司 | Battery state of charge calculation method, device, server and medium |
Non-Patent Citations (1)
| Title |
|---|
| 一种基于预测开路电压估算SOC初值的方法;龙宇舟;《通信电源技术》;20140525;第14-24页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110426638A (en) | 2019-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xiong et al. | A data-driven multi-scale extended Kalman filtering based parameter and state estimation approach of lithium-ion polymer battery in electric vehicles | |
| CN114072684A (en) | Characterization of rechargeable batteries on the server side | |
| CN109991554B (en) | Battery electric quantity detection method and device and terminal equipment | |
| CN110806541B (en) | AD-BAS-based lithium battery model parameter identification method | |
| US20200209316A1 (en) | New method for iteratively identifying parameters of equivalent circuit model of battery | |
| CN110568373A (en) | Lithium battery health state evaluation method, system, terminal and storage medium | |
| CN110888057A (en) | Power lithium ion battery electrochemical parameter identification method and system | |
| CN110888070A (en) | Battery temperature estimation method, device, equipment and medium | |
| US20220120821A1 (en) | Method, apparatus and medium for estimating battery remaining life | |
| CN114371409A (en) | Training method of battery state prediction model, and battery state prediction method and device | |
| CN103744027A (en) | Kalman filtering-based self-correction cell SOC estimation method | |
| Lin et al. | A novel approach to state of charge estimation using extended kalman filtering for lithium-ion batteries in electric vehicles | |
| CN111208428B (en) | Real-time calculation method and system for cycle number of energy storage battery and storage medium | |
| CN110426638B (en) | Method and system for rapidly calculating open-circuit voltage of battery | |
| CN113574763A (en) | Charging method, electronic device, and storage medium | |
| CN112731160A (en) | Battery hysteresis model training method, and method and device for estimating battery SOC | |
| CN117110884A (en) | Lithium battery remaining service life prediction method based on multi-core correlation vector machine | |
| CN116125291A (en) | Battery energy state estimation method based on OCV curve segmentation and storage medium | |
| CN116736131A (en) | Battery health state estimation method, terminal device and storage medium | |
| CN115980588A (en) | Lithium ion battery health state estimation method based on self-encoder extraction features | |
| CN115825749A (en) | Method and system for predicting health state of battery and electronic equipment | |
| CN115291113A (en) | Unified joint estimation method and system for SOC, SOH and RUL of lithium ion battery | |
| CN113359050A (en) | Method and device for calibrating aging of rechargeable battery and computer readable medium | |
| CN112578302A (en) | Echelon utilization power battery recombination method, system, equipment and storage medium | |
| CN111239615A (en) | Method and device for determining parameters of battery model, storage medium and computer equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |