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A method for estimating the internal temperature of a single battery

A technology of internal temperature and single battery, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as complex methods and insufficient precision, reduce calculation amount, simple and effective solution, and good protection and management of batteries Effect

Active Publication Date: 2017-12-26
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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  • A method for estimating the internal temperature of a single battery
  • A method for estimating the internal temperature of a single battery
  • A method for estimating the internal temperature of a single battery

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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 a method for estimating the internal temperature of a single battery, which includes an offline part and an online part. The offline part includes: a1) obtaining the internal resistance characteristics of the battery cell at different temperatures; a2) according to the internal resistance characteristics Obtain the standard relationship between the internal temperature of the battery and the internal resistance of the battery; the online part includes: b1) online detection of the current, terminal voltage and surface temperature of the current working battery; b2) online estimation of the current working battery according to the current and terminal voltage Internal resistance; b3) Estimate the internal temperature of the current working battery according to the internal resistance of the battery obtained in step b2), the surface temperature obtained in step b1) and the standard relationship obtained in step a2). Compared with the prior art, the present invention has the advantages of real-time estimation of the internal temperature of the battery, simple method, and effectively reduced calculation amount.

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 Patents(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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