A sleep-wake-up system and control method for an electric vehicle controller

Abstract

The invention relates to a dormancy wake-up system and a control method for an electric vehicle controller. The system includes a CAN chip with a wake-up function, a logic gate circuit, a PWR module, an MCU, and a switch module. The system adds a switch module before the PWR circuit module. , through the logic gate circuit to control the closing and opening of the switch module, so as to control the working power of the CAN chip and the MCU to be disconnected when the controller is static, so that the static power consumption of the controller can be minimized, and then the CAN chip with wake-up function can be used in the When the working power supply is disconnected, it monitors whether there is a CAN message on the CAN bus and sends out a wake-up signal, and uses this signal to trigger the logic gate circuit to control the switch module to close, so that the MCU and CAN chip are powered on again, thereby supporting the controller to resume In the working mode, the system of the present invention not only has low static power consumption, but also has a simple circuit structure, and the success rate of CAN wake-up and sleep is high.

Description

technical field [0001] The invention belongs to the field of electric vehicle control, in particular to an electric vehicle controller dormancy wake-up system, and also relates to a dormancy wake-up control method for the electric vehicle controller. Background technique [0002] ECU (abbreviation of Electronic Control Unit, Chinese translation: controller) sleep is to make ECU enter sleep mode, wake up is to switch ECU from sleep mode to work mode, ECU sleep can reduce ECU static power consumption, thereby reducing vehicle static (parking) time) power consumption. An electric car has multiple controllers. When the car is parked, its ECU is generally in sleep mode. At this time, its static power consumption directly affects the output power of the battery. The greater the static power consumption of the ECU, the faster the battery power will be consumed, and the higher the battery capacity requirement is, because the battery is exhausted, which will not only cause the car t...

AI Technical Summary

Problems solved by technology

[0015] 1) When the controller is in sleep mode, its MCU and CAN driving circuit are still powered on. Although the MCU is in low power consumption mode and the CAN driving circuit is in monitoring mode, the static power consumption of the controller is still relatively large, which affects the static performance of the vehicle. The above problems exist in both key sleep and CAN sleep;

[0016] 2) The above-mentioned level detection circuit needs to perform voltage comparison, signal latching, etc. These circuit structures are all composed of hardware, which leads to a complex circuit structure of the system, and is easy to introduce errors, resulting in a low success rate of CAN wake-up and sleep control, often It takes multiple CAN signals to achieve the effect

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