Electric vehicle controller sleep wake-up system and control method thereof

Abstract

The invention relates to an electric vehicle controller sleep wake-up system and a control method thereof. The system comprises a CAN chip with a wake-up function, a logic gate circuit, a PWR Module,an MCU and switch module. The switch module is additionally arranged before the PWR circuit module, and on / off of the switch module is controlled through the logic gate circuit so as to control the working power supply of the CAN chip and the MCU to be disconnected when the controller is static and minimize the static power consumption of the controller. Then the characteristic that the CAN chip with the wake-up function can monitor the CAN message of the CAN bus and send out a wake-up signal under the condition that the working power supply is disconnected is utilized, the switch module is controlled to be closed by using the signal to trigger the logic gate circuit and the MCU and the CAN chip are powered on again so as to support the controller to resume the working mode again. The system has low static power consumption and has simple circuit structure and high success rate of CAN sleep wake-up.

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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