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

Active Publication Date: 2015-08-26
TONGJI UNIV
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Problems solved by technology

This method also has the disadvantages of complicated method and insufficient precision.

Method used

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  • Inner temperature estimation method for single cell
  • Inner temperature estimation method for single cell
  • Inner temperature estimation method for single cell

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0032] Such as figure 1 As shown, this embodiment provides a method for estimating the internal temperature of a single battery, including an offline part and an online part. The offline part is to obtain the standard relationship between the battery internal temperature and the battery internal resistance, and the online part is based on the standard relationship and the online The measurement information estimates the internal temperature of the single battery, and the specific steps are as follows:

[0033] (1) Perform a characteristic test on the battery cell to obtain the intern...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 戴海峰魏学哲朱建功孙泽昌
Owner TONGJI UNIV
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