Battery internal temperature measurement method, device and system

A technology of internal temperature and measurement method, applied in the field of measurement, can solve the problem of low accuracy of battery temperature and achieve the effect of improving accuracy

Active Publication Date: 2017-11-07
DATANG NXP SEMICON CO LTD
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Problems solved by technology

[0003] Usually, when measuring the internal temperature of the battery, one or more galvanic couples are used to collect the temperature on the surface of the battery, and then according to the temperature inside the battery; since there is a certain temperature difference between the surface and the inside of the battery, the accuracy of the battery temperature measured by this method is not high.

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  • Battery internal temperature measurement method, device and system
  • Battery internal temperature measurement method, device and system
  • Battery internal temperature measurement method, device and system

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Embodiment Construction

[0019] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] In order to facilitate the description of the following embodiments, the Nyquist curve is introduced. Generally, the characteristics of the electrochemical system can be analyzed through the electrochemical impedance spectrum corresponding to the electrochemical system; the battery in the embodiment of the present invention can be equivalent to an electrochemical system, therefore, the electrochemical impedance spectrum of the battery can be obtained first, Then, the temperature of the battery is analyzed by electrochemical impedance spectroscopy of the battery. Among them, alternating currents of different frequencies can be passed through the battery to obtain the voltage drop at both ends of the battery, and then determi...

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Abstract

The embodiment of the invention provides a battery internal temperature measurement method, device and system. The method comprises the steps that the target nyquist curve of a battery is determined in the work process of the battery; target points of intersection of the target nyquist curve and the real axis are determined and the frequency of the target points of intersection is determined; and the internal temperature of the battery is determined according to the frequency of the target points of intersection and a preset linear relation, wherein the preset linear relation is the relation of the internal temperature of the battery and the frequency so that the internal temperature of the battery can be directly determined according to the corresponding frequency of the points of intersection of the target nyquist curve and the real axis, and the measurement accuracy of the internal temperature of the battery can be enhanced.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a battery internal temperature measurement method, a battery internal temperature measurement device and a temperature measurement system. Background technique [0002] With the continuous development of the economy, non-renewable resources will continue to decrease, and the environment will inevitably be polluted; therefore, renewable resources and secondary energy can be applied to various fields to achieve the purpose of energy conservation and environmental protection; Apply secondary energy electric energy to the automotive field such as new energy vehicles. Among them, new energy vehicles use batteries, storage batteries, etc. The system monitors the battery status of new energy vehicles to ensure the safety of new energy vehicles, such as monitoring the internal temperature of the battery. [0003] Usually, when measuring the internal temperature of the battery, one o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/367
Inventor 郑鹏飞
Owner DATANG NXP SEMICON CO LTD
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