Short Circuit Protection Circuit Based on Hall Current Sensor and Digital Voltage Comparator

Abstract

The invention relates to a short-circuit protection circuit based on a hall current sensor and a digital voltage comparator. The short-circuit protection circuit comprises the hall current sensor, a relay and a microprocessor. The digital voltage comparator corrugated metal pipe (CMP), a digifax conversion module analog digital converter (ADC) and an input / output (I / O) module are arranged inside the microprocessor. The digital voltage comparator CMP is connected with the hall current sensor through a current-limiting resistor. The digifax conversion module ADC is in electric connection with an output end of the hall current sensor. The I / O module is in electric connection with the relay. The short-circuit protection circuit based on the hall current sensor and the digital voltage comparator is provided with the microprocessor and the digital voltage comparator CMP and the digifax conversion module ADC are arranged inside the microprocessor. The short-circuit protection circuit is simple in structure, high-efficiency, stable, programmable and low in cost. The short-circuit protection circuit has the self-recovery function.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a short-circuit protection circuit applied to a battery power management system to realize short-circuit protection. Background technique [0002] Lithium iron phosphate power battery is a new type, high efficiency, safe and pollution-free new energy battery. Due to its excellent performance, it is widely used in fields and industries such as new energy passenger vehicles, communications, mining, wind and solar power generation energy storage systems, etc. The lithium iron phosphate battery power management system generally has the characteristics of low voltage, high current, and small size, and the working current can reach more than 30A. The lithium iron phosphate battery requires a battery power management system (BMS) for maintenance and management during use. Therefore, the functions that the battery power management system should have are: (1) battery status management;...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a short-circuit protection circuit based on a Hall current sensor and a digital voltage comparator to solve the above-mentioned problems of high cost and no self-recovery ability in the short-circuit protection of the existing battery power management system. , Low road cost, high efficiency, programmable, and self-recovery

Images