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Characterisation of lithium plating in rechargeable batteries

A technology for rechargeable batteries and batteries, which is applied in the direction of non-aqueous electrolyte batteries, batteries, secondary batteries, etc., and can solve problems such as platform disappearance

Pending Publication Date: 2021-11-30
トゥワイステクノロジーズゲーエムベーハー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the battery is discharged dynamically, these platforms will disappear

Method used

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  • Characterisation of lithium plating in rechargeable batteries
  • Characterisation of lithium plating in rechargeable batteries
  • Characterisation of lithium plating in rechargeable batteries

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Embodiment Construction

[0034] The above-mentioned characteristics, characteristics and advantages of the present invention and the manner in which they are achieved will be more clearly and distinctly understood in conjunction with the following description of an embodiment explained in more detail with the aid of the accompanying drawings.

[0035] The invention is explained in more detail below using a preferred exemplary embodiment with reference to the drawings. In the drawings, the same reference numerals designate the same or similar elements. The drawings are schematic representations of different embodiments of the invention. Elements shown in the figures are not necessarily shown to correct scale. Rather, the different elements shown in the figures are reproduced in such a way that a person skilled in the art can understand their function and general use. The connections and couplings between functional units and elements shown in the figures can also be realized as indirect connections o...

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Abstract

The invention relates to a method for the characterisation of a rechargeable battery (91-96) at risk of lithium plating. The method comprises the following steps: receiving (1001) operating values (41) of the battery (91-96) as time series, wherein the operating values of the battery comprise a terminal voltage of the battery ( U(t) ) and a battery power of the batter ( I(t) ); determining (1002) a modeled terminal voltage ( USim(t) ) with a model of the battery (400), based on the battery power ( I(t) ); comparing (1003) the modeled terminal voltage ( USim(t) ) with the terminal voltage ( U(t) ); and determining (1004, 1004a, 1004b) a lithium plating status of the battery based on the comparison.

Description

technical field [0001] Various examples of the invention relate to methods for characterizing rechargeable batteries. Various examples of the present invention relate, inter alia, to characterization techniques for determining the Lithium evolution state of a battery. Background technique [0002] Rechargeable batteries, such as traction batteries for electric vehicles, have a finite lifespan. One factor that can affect the life of a rechargeable battery is the so-called lithium precipitation that can occur in some rechargeable batteries. [0003] Lithium evolution here means that lithium is deposited in metallic form at the anode of the rechargeable battery. This metal deposition can negatively affect the performance of the rechargeable battery. A distinction can be made between reversible lithium and irreversible lithium. Lithium evolution and Laboratory studies on this. [0004] It is known to demonstrate lithium evolution under laboratory conditions by means of wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/396
CPCG01R31/367G01R31/396H01M10/48H01M10/052G01R31/378G01R31/392Y02E60/10G01R31/3835H01M10/0525H01M2220/20
Inventor 迈克尔·鲍曼
Owner トゥワイステクノロジーズゲーエムベーハー