Temperature and strain acquisition system

Abstract

The invention discloses a temperature and strain acquisition system. The system comprises a battery module, an acquisition module, an analog-to-digital conversion module and a battery management central unit. The acquisition module comprises a temperature acquisition module and a strain acquisition module. The temperature acquisition module comprises an optical fiber temperature sensor and a first signal processing module. The strain acquisition module comprises an optical fiber strain sensor and a second signal processing module. The optical fiber temperature sensor is used for acquiring the temperature information of the battery module and outputting a first optical signal. The optical fiber strain sensor is used for collecting the strain information of the battery module and outputting a second optical signal. The first signal processing module is connected with the optical fiber temperature sensor and converts the first optical signal into a first voltage signal. The second signal processing module is connected with the optical fiber strain sensor and converts the second optical signal into a second voltage signal. The first signal processing module and the second signal processing module are connected with the analog-to-digital conversion module. The analog-to-digital conversion module is further connected with the battery management central unit.

Description

【Technical field】 [0001] The invention relates to the technical field of battery modules, in particular to a temperature and strain acquisition system. 【Background technique】 [0002] In today's increasingly serious energy crisis, the new energy industry is developing rapidly, and the number of electric vehicles is increasing. In order to ensure the safe and trouble-free operation of the battery system, the battery management system needs to collect information such as battery module temperature and strain at all times; in the design process of traditional battery management systems, the way of temperature collection is to use thermistor sensors, which can only collect battery module surface information. temperature, and need to be in direct contact with the battery module under test, there is heat conduction between them, which affects the temperature distribution of the battery module under test, and the acquisition results are not good; The method of pasting resistance s...

AI Technical Summary

Problems solved by technology

In order to ensure the safe and trouble-free operation of the battery system, the battery management system needs to collect information such as battery module temperature and strain at all times; in the design process of traditional battery management systems, the way of temperature collection is to use thermistor sensors, which can only collect battery module surface information. temperature, and need to be in direct contact with the battery module under test, there is heat conduction between them, which affects the temperature distribution of the battery module under test, and the acquisition results are not good; The method of pasting resistance strain gauges on the surface of the battery module, this method only collects the external strain of the battery module, and lacks the monitoring and protection of the internal strain of the battery module

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