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Method and device for the diagnosis of battery cells

A battery and battery status technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as unusable

Pending Publication Date: 2021-07-30
RWTH AACHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this method were to be executed during dynamic operation of the battery with different charge and discharge currents, it would lead to unusable results

Method used

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  • Method and device for the diagnosis of battery cells
  • Method and device for the diagnosis of battery cells
  • Method and device for the diagnosis of battery cells

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Experimental program
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Embodiment Construction

[0116] figure 2 Shown is a possible advantageous arrangement for carrying out the process of the invention. It comprises a control unit 10 , means for generating an external trigger signal 15 , an excitation unit 20 , a measurement unit 30 , an evaluation unit 40 , a control unit 50 , a diagnosis unit 60 and a transmission unit 70 . The means for generating the external trigger signal 15 and the trigger signal 15 are optional and can start a new measurement cycle as a function of an external event.

[0117] Preferably, the external trigger signal 15 is transmitted via a not shown data bus.

[0118] With the device according to the invention, the method according to the invention can be carried out.

[0119] Refer below image 3 A preferred embodiment of the method according to the invention is explained. This method uses figure 2 The device shown is conveniently carried out. Excitation signal construction 100 is performed with suitable parameters, in particular excitat...

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PUM

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Abstract

The invention relates to a method for determining a battery state of at least one battery cell comprising the steps: a. applying a current-exciting signal; b. recording an impedance spectrum of the battery cell; c. determining an evaluation variable on the basis of a measured impedance spectrum. This method is distinguished in that at least one of the parameters amplitude, frequency and relative phase difference of at least one component of the current-exciting signal is modified as a function of the first measured response signal such that a measuring error is minimized, in that a further measured response signal is determined and evaluated, in that the value evaluated is used as an evaluation variable and in that the battery state variables of the battery cell are determined on the basis of a comparison of at least one diagnostic variable with at least one reference value and / or with at least one further diagnostic variable. The invention further relates to an exciter unit for performing the method, a battery system comprising an exciter unit of this nature, a device for performing the method and a battery system comprising a device of this kind.

Description

technical field [0001] The invention relates to a method for diagnosing critical changes in a battery, in particular pressure changes, gas generation and temperature changes, to an actuation unit for carrying out the method, to a battery system comprising such an actuation unit , relates to a device for performing the method and a battery system comprising such a device. Background technique [0002] The use of electrical or electronic equipment, especially portable equipment, often depends on electrochemical cells as a power source, so-called "cells" or "batteries". Batteries can be used in electronic equipment such as telecommunications equipment (e.g., mobile phones, tablets, computers), transportation equipment (e.g., automobiles, airplanes, ships), and non-portable equipment such as for centralized storage or distributed storage Power Systems. [0003] Due to the external working conditions of the battery, such as excessive current during charging and discharging, exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/389G01R31/392
CPCG01R31/389G01R31/388G01R31/392Y02E60/10
Inventor 亨德里克·扎彭亚历山大·吉提斯
Owner RWTH AACHEN UNIV