Vehicle-mounted charger measurement and control circuit and method

Abstract

The invention provides a vehicle-mounted charger measurement and control circuit and method, and the circuit comprises a signal collection module which collects a charging signal of a charger; acquiring a first voltage signal through a vehicle-mounted power supply; the first control module obtains and outputs an awakening instruction according to the charging signal, and the awakening instruction comprises a second voltage signal and a third voltage signal; the switch module obtains a voltage difference between the first voltage signal and the second voltage signal by comparing the first voltage signal with the second voltage signal, and when the voltage difference is matched with a preset threshold voltage, the output end of the switch module is in a power-on state; the second control module supplies power to the second control module according to the power-on state of the switch module, obtains a third voltage signal when the second control module is in the power-on state, and triggers the second control module to control the charging connection of the charger according to the third voltage signal, so that the charger is electrically connected with the vehicle-mounted power supply; the two control modules coordinate with each other, and power consumption is reduced while the awakening function of the charger is met.

Description

technical field [0001] The present application relates to the technical field of on-board chargers, in particular to a measurement and control circuit and method for on-board chargers. Background technique [0002] At present, my country is vigorously developing new energy vehicles. New energy vehicles are mainly designed with rechargeable lithium batteries as the driving energy. Among them, the charging methods of electric vehicles include fast charging and slow charging. Battery charging. At the same time, when designing electric vehicles, due to the different structures of each vehicle, the hardware circuit design of the charging confirmation signal and charging control signal of the charger is also different, which is not conducive to the platformization of the charger. Therefore, the electric The charger of the car is generally set on the charging circuit of the electric car. [0003] The on-board charger needs to have the wake-up function of the charging confirmation si...

AI Technical Summary

Problems solved by technology

[0003] The on-board charger needs to have the wake-up function of the charging confirmation signal and the charging control signal. At the same time, when charging is scheduled, the charger needs to be in a dormant state when the charging confirmation signal and the charging control signal exist. These two requirements are contradictory. Therefore, a controller with a storage function is needed to store the wake-up command, but generally a controller with a storage function consumes a lot of power, resulting in a waste of energy

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