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Lead-acid battery available capacity estimation method and device based on response curved surface design

A lead-acid battery and response surface technology, which is applied to measuring devices, measuring electrical variables, and measuring electricity, can solve problems such as time-consuming, inaccurate correspondence, and long-term data accumulation.

Inactive Publication Date: 2021-09-14
珠海创芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. If less experimental data is used for analysis, it will lead to large estimation deviation, low estimation accuracy and instability
[0011] 2. If a large amount of experimental data is used for analysis, although the estimation accuracy requirements can be met, the data accumulation takes a long time and the workload of data analysis is heavy
[0012] 3. In the above two patents, the OCV of the equivalent circuit model in the first scheme is only a function related to SOC. When the corresponding relationship between OCV and SOC is different under different aging degrees of the battery, the OCV and SOC of the battery after aging The correspondence of will not be accurate
[0013] 4. The maximum available capacity estimation method based on the battery open circuit voltage is very dependent on the accuracy of the correspondence between OCV and SOC, and requires high experimental accuracy; the maximum available capacity estimation method based on the battery equivalent circuit model is greatly affected by the complexity of the model , usually the more complex the model is, the higher the estimation accuracy is; the maximum usable capacity estimation method based on battery capacity gain analysis and voltage differential analysis focuses on the laboratory environment; the maximum usable capacity estimation method based on battery aging experiments requires a large number of aging experiments , spending a lot of time

Method used

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  • Lead-acid battery available capacity estimation method and device based on response curved surface design
  • Lead-acid battery available capacity estimation method and device based on response curved surface design
  • Lead-acid battery available capacity estimation method and device based on response curved surface design

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Embodiment 1

[0062] In production practice, it is often necessary to study how the response variable depends on the input variable, and then find the functional relationship between them. When the number of independent variables is small (usually no more than 4), the response surface method is one of the best methods . The response surface method was first proposed by statisticians. It is a product of a combination of mathematical methods, statistical analysis and experimental design methods. It is usually used to explore the mathematical model between the response variable and input variable of an unknown system, and to conduct experiments in a systematic way. Get the corresponding response value and input value to achieve the purpose of predicting the response variable.

[0063] Based on this method, the present invention proposes a method for estimating the available capacity of lead-acid batteries based on response surface design, with U oc For the response variables, SOC and C max F...

Embodiment 2

[0109] Embodiment 2 provides a device for estimating available capacity of lead-acid batteries based on response surface design, which is a virtual device corresponding to Embodiment 1 above. Please refer to Figure 4 shown, which includes:

[0110] The first construction unit 210 is configured to construct a relationship model among the open circuit voltage, the state of charge and the maximum available capacity based on the response surface model;

[0111] A calculation unit 220, configured to obtain various parameters of the relational model by using an experimental method;

[0112] The second construction unit 230 is used to incorporate the maximum available capacity into the parameter identification of the battery model, together with the state of charge, equivalent resistance, polarization internal resistance and polarization capacitance to form the parameters to be identified of the lead-acid battery;

[0113] The optimization unit 240 is configured to use an optimizat...

Embodiment 3

[0137] see Figure 5 , Figure 5 It is a schematic structural diagram of an electronic device disclosed in an embodiment of the present invention. Such as Figure 5 As shown, the electronic equipment may include:

[0138] a memory 310 storing executable program code;

[0139] a processor 320 coupled to the memory 310;

[0140] Wherein, the processor 320 invokes the executable program code stored in the memory 310 to execute some or all of the steps in the method for estimating the usable capacity of a lead-acid battery based on response surface design disclosed in Embodiment 1.

[0141] The embodiment of the present invention discloses a computer-readable storage medium, which stores a computer program, wherein the computer program causes the computer to execute part or all of the method for estimating the usable capacity of a lead-acid battery based on response surface design disclosed in Embodiment 1 step.

[0142] The embodiment of the present invention also discloses...

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PUM

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Abstract

The embodiment of the invention relates to the technical field of power batteries, and discloses a lead-acid battery available capacity estimation method and device based on response curved surface design. The method comprises the following steps: constructing a relation model among an open-circuit voltage, a charge state and a maximum available capacity based on a response curved surface model; obtaining each parameter of the relation model by using a test method; bringing the maximum available capacity into parameter identification of the battery model, and forming to-be-identified parameters of a lead-acid battery together with the charge state, the equivalent resistance, the polarization internal resistance and the polarization capacitance; determining a fitness function corresponding to the to-be-identified parameter by using an optimization algorithm, wherein the root-mean-square error value of the terminal voltage corresponding to the fitness function is minimum; and calculating the charge state at any moment under the working condition by using an ampere-hour integral method, and determining the maximum available capacity based on a fitness function. By implementing the embodiment of the invention, the maximum available capacity of the battery can be quickly and accurately estimated.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method and device for estimating the available capacity of a lead-acid battery based on response surface design. Background technique [0002] In 1860, Planck invented the lead-acid battery, which has a history of more than 160 years. Lead-acid batteries have high reliability, low cost, strong surge capability, and an efficiency of about 65% to 80%. Although lead-acid batteries have been replaced by lithium-ion batteries in many scenarios, in some specific application areas, lead-acid batteries are more popular, and lead-acid batteries are usually used as backup and emergency power supplies. [0003] Lead-acid battery state of health (SOH) estimation is one of the core functions of the battery management system. Accurate SOH estimation can ensure the safe and reliable operation of the lead-acid battery system, optimize the lead-acid battery system, and provide energy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/379G01R31/367G01R31/387
CPCG01R31/379G01R31/367G01R31/387
Inventor 谭天诚吴卫馨刘平张桂斌谭天利吴刚吴文昊
Owner 珠海创芯科技有限公司