Alternating-current impedance spectrum acquisition method and apparatus, and related assembly

A technology of AC impedance and acquisition method, applied in measurement devices, measurement resistance/reactance/impedance, instruments, etc., can solve the problem of high hardware cost and achieve the effect of saving hardware cost

Inactive Publication Date: 2020-02-18
杭州华塑科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing technical solutions need to design AC impedance test equipment, and the hardware cost is relatively high

Method used

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  • Alternating-current impedance spectrum acquisition method and apparatus, and related assembly
  • Alternating-current impedance spectrum acquisition method and apparatus, and related assembly
  • Alternating-current impedance spectrum acquisition method and apparatus, and related assembly

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Embodiment Construction

[0043] The core of the present application is to provide an AC impedance spectrum acquisition method, device, electronic equipment and computer-readable storage medium, which does not require additional design of AC impedance testing equipment and saves hardware costs.

[0044] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0045] AC impedance has a wide range of applications in the field of electrochemi...

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Abstract

The application discloses an alternating-current impedance spectrum acquisition method applied to a BMS system of a battery. The BMS system comprises an equalization switch. The alternating-current impedance spectrum acquisition method comprises the steps that: when the BMS system is in an equalization on state, the switching frequency of the equalization switch is sequentially adjusted to a plurality of preset frequency values, so that alternating-current impedance test signals corresponding to the preset frequency values are provided for the battery; an alternating current impedance of the battery under each preset frequency value is obtained; and an alternating-current impedance spectrum of the battery is obtained based on all alternating-current impedances. According to the application, when the BMS system of the battery enables the equalization function, the alternating-current impedance test signal is provided for the battery by adjusting the switching frequency of the equalization switch in the equalization circuit, so that the online measurement of the alternating-current impedance spectrum is realized without any additionally designed alternating-current impedance test equipment and thus the hardware cost is saved. In addition, the invention also discloses an alternating-current impedance spectrum acquisition device, electronic equipment and a computer readable storagemedium, which have the above beneficial effects.

Description

technical field [0001] The present application relates to the field of batteries, in particular to a method, device and related components for acquiring an AC impedance spectrum. Background technique [0002] AC impedance is widely used in the field of electrochemistry, especially in the field of lithium-ion batteries, such as conductivity, chemical diffusion coefficient, growth and evolution of SEI (Solid Electrolyte Interphase, solid electrolyte membrane), dynamic measurement of charge transfer and material transfer processes, etc. . AC impedance spectroscopy can study the characteristics of electrode processes, including ohmic characteristics, electrochemical polarization characteristics and concentration polarization characteristics. At present, in the process of online testing the AC impedance spectrum, it is often necessary to design AC impedance testing equipment. The AC impedance testing equipment provides the battery with a sine-cosine AC voltage signal, and the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385G01R27/02
CPCG01R27/02G01R31/385
Inventor 杨冬强李明星
Owner 杭州华塑科技股份有限公司
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