Inner temperature estimation method for single cell

A technology of internal temperature and single battery, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of insufficient accuracy and complicated methods, and achieve simple and effective solutions, reduce the amount of calculation, and protect and manage batteries well Effect
CN104865534AActive Publication Date: 2015-08-26TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2015-08-26

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Abstract

The invention relates to an inner temperature estimation method for a single cell, which comprises an offline part and an online part. The offline part executes the steps of a1) acquiring the internal resistance characteristic of the single cell at different temperatures; and a2) acquiring a standard relationship between the inner temperature of the cell and the internal resistance of the cell according to the internal resistance characteristic. The online part executes the steps of b1) performing online detection on the current, end voltage and surface temperature of a current working cell; be) performing online estimation for the internal resistance of the current working cell according to the current and the end voltage; and b3) estimating the internal temperature of the current working cell according to the internal resistance acquired in the step b2), the surface temperature acquired in the step b1) and the standard relationship acquired in the step a2). Compared with the prior art, the inner temperature estimation method for the single cell has advantages of effective online estimation for the inner temperature of the single cell, simple operation, effective calculation amount reduction, etc.
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Description

technical field

[0001] The invention relates to the field of power batteries, in particular to a method for estimating the internal temperature of a single battery, which estimates the internal temperature of the battery in real time on the basis of only using current, voltage and surface temperature sensors. Background technique

[0002] As a key component, the power battery system has been used more and more in the fields of electric vehicles and electric energy storage. Due to the characteristics of the battery itself, the battery needs to be grouped and managed reasonably during use. Due to the characteristics of common power batteries such as high temperature attenuation, high temperature thermal runaway, and low temperature performance degradation, the battery needs to be reasonably temperature controlled during use. In order to achieve better temperature control, it is necessary to monitor the temperature of the battery.

[0003] In traditional applications, the met...

Claims

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