System for detecting temperature of dynamic battery set for hybrid power car

Abstract

The invention provides a temperature detection system for a dynamic battery unit of a hybrid electric vehicle, which comprises a temperature collecting module, an A / D conversion module, a data processing and control module and a communication module. A temperature signal is transmitted out through a thermocouple wire, and control chips receive the temperature analog signal and output the signal through a serial port after carrying out corresponding A / D conversion. The system adopts the multi-path temperature collection of 120 paths with a temperature sensor on each battery sub-module, thereby accurately detecting the temperature distribution of each battery block, and consequently taking corresponding measures to enable the temperature distribution of the dynamic battery unit as even as possible. The system adopts 4 chips, wherein one serves as a master chip, and the other three serve as slave chips. The collected data is all transmitted out through the serial port. The system deserves generalization and application with simple design, low cost, small investment and convenient use.

Description

technical field [0001] The invention belongs to the field of automotive electronic application technology, and in particular relates to the battery management technology of the automobile. The invention relates to a temperature field acquisition system of a power battery of a hybrid electric vehicle, relates to the temperature field distribution of the power battery during vehicle running, and belongs to the technical field of vehicle data acquisition. It is especially suitable for the monitoring of the temperature field of the power battery during the development or driving of the hybrid electric vehicle, and the occasions where the temperature field of the power battery needs to be processed. Background technique [0002] With the increasing popularization of automobiles, the depletion of oil resources and the seriousness of environmental pollution, the development of new energy-saving and environment-friendly automobiles has become the focus of everyone's research. A hyb...

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Problems solved by technology

[0004] The existing measures for battery temperature collection of hybrid electric vehicles are generally to collect several points in the entire power battery or distribute a temperature sensor according to a small group in the battery. Although such collection is simple and convenient, they cannot accurately explain each small temperature. The accurate temperature of the battery; the traditional NTC thermistor is also used in the selection of the sensor, and the temperature characteristic of this sensor shows a reciprocal characteristic. The resistance change is relatively large at room temperature, and the resistance changes in the suspicious temperature range. Very small, if the linearization of sensor characteristics is not done, the accuracy will definitely not be enough, and the corresponding processing will inevitably be much more complicated

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