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Battery health state assessment method and device, electronic equipment and storage medium

A battery health status and battery technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of affecting battery work, evaluation, inability to perform rapid evaluation, and complex evaluation algorithms, so as to facilitate online rapid evaluation and improve The effect of safe operation and maintenance level and easy collection

Pending Publication Date: 2022-06-24
SHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the traditional battery health status evaluation technology, or it is necessary to conduct offline detection of the battery, which affects the battery work and has a certain hysteresis in evaluation; or it is necessary to detect the battery voltage, current, temperature, Multiple data such as magnetic properties lead to high detection costs and complex evaluation algorithms; or it takes a long time to test and cannot be quickly evaluated. The resulting defects provide a battery health status evaluation method, device, electronic equipment and storage medium

Method used

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  • Battery health state assessment method and device, electronic equipment and storage medium
  • Battery health state assessment method and device, electronic equipment and storage medium
  • Battery health state assessment method and device, electronic equipment and storage medium

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Embodiment 1

[0064] The battery state of health (SOH) characterizes the ability of the current battery to store electrical energy relative to the new battery. SOH=100% at the beginning of life and SOH=0% at the end of life. At present, the most widely used is to use the battery capacity decay to define the SOH, and the given SOH definition is as follows:

[0065]

[0066] In formula (1), C aged is the available capacity of the battery; C rated is the rated capacity of the battery.

[0067] In addition to the above-mentioned definition methods, SOH is also defined from the perspective of battery discharge capacity, battery internal resistance, and the number of cycles remaining in the TV.

[0068] figure 1 A method for evaluating the state of health of a battery in this embodiment is shown. It can use the battery state of health evaluation model to evaluate the SOH of the battery based on the platform voltage data of the battery. The battery to be evaluated can be the battery of the...

Embodiment 2

[0130] Figure 9 A device for evaluating the state of health of a battery according to this embodiment is shown. It includes a data acquisition module 41 , a function calculation module 42 , a maximum value calculation module 43 and a model evaluation module 44 . The data collection module 41 is used for collecting platform voltage data of the battery to be evaluated, and the platform voltage data includes the platform voltage and corresponding time points during the working process of the battery. The function calculation module 42 is configured to calculate the probability density function to be evaluated corresponding to the battery to be evaluated according to the platform voltage data of the battery to be evaluated, and the probability density function to be evaluated represents the corresponding relationship between the platform voltage and the probability density of the battery to be evaluated. The maximum value calculation module 43 is used to obtain the maximum proba...

Embodiment 3

[0144] Embodiments of the present invention also provide an electronic device, which can be expressed in the form of a computing device (for example, a server device), and includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein When the processor executes the computer program, the method for evaluating the state of health of the battery in Embodiment 1 of the present invention can be implemented.

[0145] Figure 10 A schematic diagram of the hardware structure of this embodiment is shown, such as Figure 10 As shown, the electronic device 9 specifically includes:

[0146] At least one processor 91, at least one memory 92, and a bus 93 for connecting different system components (including processor 91 and memory 92), wherein:

[0147] The bus 93 includes a data bus, an address bus and a control bus.

[0148] Memory 92 includes volatile memory, such as random access memory (RAM) 921 and / or cache memory 922 , and may f...

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Abstract

The invention discloses a battery health state assessment method and device, electronic equipment and a storage medium. The method comprises the steps of collecting platform voltage data of a to-be-evaluated battery; according to the platform voltage data of the to-be-evaluated battery, a to-be-evaluated probability density function corresponding to the to-be-evaluated battery is calculated, and the to-be-evaluated probability density function represents the corresponding relation between the platform voltage and the probability density of the to-be-evaluated battery; solving the maximum probability density value of the probability density function to be evaluated; the SOH corresponding to the maximum probability density value is determined through a battery health state assessment model, the determined SOH is the assessment SOH of the battery to be assessed, and the battery health state assessment model is a function representing the corresponding relation between the maximum probability density value of the battery and the SOH. The maximum probability density value is used as an evaluation index of the battery health state, the SOH value of the battery is determined, and the method has the advantages that the index is simple and reliable, and online rapid evaluation is facilitated.

Description

technical field [0001] The invention belongs to the field of battery operation and maintenance, and in particular relates to a battery state of health (SOH) evaluation method, device, electronic device and storage medium. Background technique [0002] Energy storage technology has the characteristics of multi-energy conversion and energy time-shifting, and is an effective means to coordinate power supply and load. Large-scale energy storage systems can be applied in multiple links of power generation, transmission and consumption. After the energy storage power station has been running for a period of time, the performance of the lithium battery with good consistency gradually becomes uneven, which brings potential risks to the safe and efficient operation of the energy storage power station. [0003] The traditional battery state of health assessment technology requires offline detection of the battery, which affects battery operation and has a certain hysteresis; or requi...

Claims

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Application Information

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IPC IPC(8): G01R31/367G01R31/382G01R31/392
CPCG01R31/367G01R31/382G01R31/392
Inventor 李雪周春邹杨杜志超孙明光黄生欧阳永生
Owner SHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD
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