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Charging and discharging path-considered battery health state estimation method

A technology for battery state of health and state of charge, applied in the measurement of electricity, electric vehicles, and measurement of electrical variables, etc., can solve problems such as the increase of health state errors, and achieve the effect of eliminating the impact

Active Publication Date: 2022-01-07
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The initial state of charge reached by different paths will affect the subsequent voltage data from the initial state of charge to full charge at the set rate, and will also lead to changes in the health indicators on the capacity increment curve generated by the above voltage data. lead to an increase in the error of the health status estimated by this health indicator

Method used

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  • Charging and discharging path-considered battery health state estimation method
  • Charging and discharging path-considered battery health state estimation method
  • Charging and discharging path-considered battery health state estimation method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0043] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0044] A ...

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Abstract

The invention provides a charging and discharging path-considered battery health state estimation method and system. The method comprises the following steps of 1) determining an initial charge state during specific charging and a historical path reaching the charge state, 2) selecting a corresponding health representation according to the charging and discharging path and the interval of the initial charge state, 3) obtaining health characterization according to historical aging data, and constructing a mapping relation between the health characterization and a health state, and 4) estimating the health state of the battery on line by using the health representation in the step 2). The method can be suitable for estimating the health state of the lithium ion battery under the wide-range initial charge state and different charging and discharging paths, and is high in practicability and precision.

Description

technical field [0001] The invention belongs to the technical field of estimating the state of health of lithium-ion batteries, and in particular relates to a method for estimating the state of health of lithium-ion batteries considering charging and discharging paths. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Accurate estimation of the state of health (SOH) of lithium-ion batteries can effectively avoid the occurrence of overcharge, overdischarge and even thermal runaway of the battery, and can provide parameter support for formulating effective measures to prolong battery life. At present, the estimation of battery health based on incremental capacity analysis (ICA) mostly directly selects the health representation on the capacity increment curve, and the established black-box model or fitted mapping relationship is not suitable fo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/378G01R31/392
CPCG01R31/378G01R31/392Y02T10/70
Inventor 崔纳新王光峰李长龙袁海涛商云龙王光臣张承慧
Owner SHANDONG UNIV