Brake resistor overheating protection method and device, readable storage medium and controller

Abstract

The embodiment of the invention provides a brake resistor overheating protection method and device, a readable storage medium and a controller, and the method comprises the steps: carrying out the integration of the difference between the real-time heat production of a brake resistor and a preset instant heat dissipation amount after the brake resistor is put into operation, and obtaining an accumulated heat value; calculating and obtaiing a temperature rise value, and adding the temperature rise value and the initial temperature value when the brake resistor is put into operation to obtain the actual temperature after the brake resistor is put into operation; and judging whether the actual temperature after the brake resistor is put into operation is greater than a preset temperature threshold, and if so, controlling the brake resistor to quit operation. According to the invention, the difference value between the real-time heat generation amount of the brake resistor and the preset instantaneous heat dissipation amount is integrated, the accumulated heat value is obtained, then the temperature rise value of the brake resistor is determined according to the intrinsic parameters ofthe brake resistor, the actual temperature of the brake resistor after being put into work is obtained, and overheating protection is conducted on the brake resistor on the premise that a temperaturesensor of the brake resistor is not adopted.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, more specifically, to a braking resistor overheat protection method, device, readable storage medium and controller. Background technique [0002] The braking resistor is located in the electric braking circuit of the vehicle. In order to prevent the braking resistor from being burned due to overheating, a temperature sensor is usually set to protect the braking resistor from overheating. Specifically, see figure 1 , when the switch drive unit of the vehicle receives the braking instruction from the regenerative braking controller, it drives the electronic switch K to turn on, so that the braking resistor R is input to consume the electric energy generated by regenerative braking; as the braking proceeds, the braking The temperature of the resistor R keeps rising. The temperature sensor Rt monitors the temperature of the braking resistor R. When the temperature of the braking resistor...

AI Technical Summary

Problems solved by technology

[0003] The existing braking resistor overheat protection method relies too much on the temperature sensor. When the temperature sensor has a fault that can be identified by the vehicle, the braking resistor will not be used; when the temperature sensor has a fault that the vehicle cannot identify, due to the collected braking Resistor temperature is unreliable, increasing the risk of braking resistor overheating

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