Integrated device for detecting high-pressure value and insulating resistance value of battery pack

Abstract

The invention discloses an integrated device for detecting a high-pressure value and an insulating resistance value of a battery pack. The integrated device for detecting the high-pressure value and the insulating resistance value of the battery pack comprises a high-pressure signal regulating circuit, a resistance dividing network, an electronic switching matrix, a low-pressure signal regulating circuit, a gain-programmable fully-differential amplifying circuit, an ADC (analog-to-digital converter) sampling circuit, a digital isolating circuit and a singlechip system, wherein the resistance dividing network comprises a sampling circuit Rs1 and a sampling circuit Rs2; the electronic switching matrix comprises a switch K1, a switch K2 and a switch K3; the singlechip system performs time-shared control over the electronic switch K1 to be in a switched-on or switched-off state; voltage information of the sampling circuit Rs1 and the sampling circuit Rs2 are received by an SPI (serial peripheral interface) interface; and through voltage information computation, the high-pressure value or the insulating resistance value of the battery pack is obtained. The integrated device for detecting the high-pressure value and the insulating resistance value of the battery pack can realize two functions of the high-pressure detection and the insulating resistance detection of the battery pack within the same signal sampling circuit system, and is low in cost and high in detection precision.

Description

technical field [0001] The invention relates to the field of electronic technology, and more specifically, the invention relates to an integrated device for detecting high voltage and insulation resistance of a battery pack. Background technique [0002] In the existing new energy vehicles and grid energy storage systems, two sets of circuit systems are required to realize the functions of battery pack high voltage detection and insulation resistance detection, which greatly increases the cost of electronic components of the entire system. [0003] In the existing battery pack high-voltage detection system, the DC internal resistance of the input terminal cannot meet the requirement of more than 10MΩ. The high voltage of the battery pack will not only cause a large power loss on the resistor divider network, but also cause heating problems in the system. , and the heating of the resistance components will further affect the measurement accuracy of the battery pack high-volta...

AI Technical Summary

Problems solved by technology

[0002] In the existing new energy vehicles and grid energy storage systems, two sets of circuit systems are required to realize the functions of battery pack high voltage detection and insulation resistance detection, which greatly increases the cost of electronic components in the entire system

[0003] In the existing battery pack high-voltage detection system, the DC internal resistance of the input terminal cannot meet the requirement of more than 10MΩ. The high voltage of the battery pack will not only cause a large power loss on the resistor divider network, but also cause heating problems in the system. , and the heating of the resistance components will further affect the measurement accuracy of the battery pack high-voltage detection system

In addition, the detection system is easily affected by the interference signal (including EMI) of the high-voltage system when the vehicle is running, which will greatly reduce the measurement accuracy of the detection system and the usability of the detection system will be greatly reduced

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