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Method for detecting SOC of thin-film solid-state lithium battery

A detection method and solid-state lithium technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of few simulation calculation methods, and achieve the effect of avoiding experimental testing methods and simple detection methods

Pending Publication Date: 2020-09-15
DONG HAN NEW ENERGY VEHICLE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are currently few reports on the simulation calculation method for the SOC of thin-film solid-state lithium batteries

Method used

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  • Method for detecting SOC of thin-film solid-state lithium battery
  • Method for detecting SOC of thin-film solid-state lithium battery
  • Method for detecting SOC of thin-film solid-state lithium battery

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Embodiment Construction

[0077] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention.

[0078] figure 1 A typical structure of the solid-state thin-film lithium battery involved in this embodiment is described. The solid-state thin-film lithium battery specifically includes a positive electrode, an electrolyte, a negative electrode and a current collector.

[0079] figure 2 The work flow diagram of the technical solution for SOC detection for solid-state thin-film lithium batteries is described.

[0080] The technical solution mainly includes:

[0081] 1). Decompose the multi-scale phenomenon of the electrochemical reaction of solid-state thin-film lithium batteries;

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Abstract

The invention relates to a method for detecting the SOC of a thin-film solid-state lithium battery. The method comprises the following steps: decomposing a multi-scale phenomenon of an electrochemicalreaction of a thin-film solid-state lithium battery; describing the multi-scale phenomenon of the electrochemical reaction by using a model and an equation; under the assumption that the environmentis stable, constructing a one-dimensional electrochemical model for describing the charging state of the thin-film solid-state lithium battery; obtaining a lithium ion distribution function in the thin-film solid-state lithium battery according to the one-dimensional electrochemical model; performing charging simulation calculation on the thin-film solid-state lithium battery according to the lithium ion distribution function, and verifying the rationality of the model; calculating the SOC.

Description

technical field [0001] The invention relates to a detection method for a thin-film solid-state lithium battery, in particular to a detection method for the SOC of a thin-film solid-state lithium battery. Background technique [0002] Thin-film solid-state lithium batteries are mainly composed of a solid substrate and a solid functional film layer on the surface of the substrate. The functional film layer includes a current collector, positive electrode, electrolyte, negative electrode and packaging protective film, and the thickness is usually only 10 μm. Thin-film solid-state lithium batteries have no organic electrolyte and are replaced by a solid, paper-like thin-film electrolyte. [0003] The battery state of charge (State of Charge, SOC) is used to characterize the remaining power of the battery, generally defined as the remaining capacity of the battery Q c and total battery capacity C i ratio. For the SOC of thin-film solid-state lithium batteries, experiments are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/387G01R31/378
Inventor 王玮
Owner DONG HAN NEW ENERGY VEHICLE TECH CO LTD
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