Control method and device of power management system, storage medium and processor

Abstract

The invention discloses a control method and device of a power management system, a storage medium and a processor. The method comprises the steps that a power-off instruction of a target vehicle is received, the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: controlling a first DCDC converter to be turned off and controlling a second DCDC converter to be turned off; the temperature of the environment where the target vehicle is located and the power consumption of at least two low-voltage storage batteries are obtained, and the at least two low-voltage storage batteries are arranged in parallel; detecting first working condition information of the low-voltage storage battery before current power-off, wherein the first working condition information comprises at least one of a non-fault state and a fault state; and based on the environment temperature and the first working condition information of the low-voltage storage battery, generating a power supply instruction which is used for controlling a power supply management system to supply power to the low-voltage storage battery. According to the invention, the technical problem of low-voltage storage battery feed is solved.

Description

technical field [0001] The present invention relates to the field of electric vehicles, and in particular, to a control method, device, storage medium and processor of a power management system. Background technique [0002] The low-voltage battery of pure electric vehicles will occasionally feed power, which will cause the controller to fail to work and the vehicle to fail to start, resulting in large user complaints. There are three main reasons for low-voltage battery feeding: First, unlike traditional fuel vehicles, pure electric vehicles are more powerful and smarter. After the network sleeps, the static current is large, and the energy of the low-voltage battery is limited. After the vehicle is turned off and powered off for a long time, the battery power is gradually exhausted, and power feeding occurs; second, the vehicle network fails, and after the user stops and powers off, the CAN network Not sleeping normally, many controllers are still in the wake-up state, an...

AI Technical Summary

Problems solved by technology

[0002] The low-voltage battery of pure electric vehicles will occasionally feed power, which will cause the controller to fail to work and the vehicle to fail to start, causing relatively large user complaints

There are three main reasons for the power feeding of low-voltage batteries: First, different from traditional fuel vehicles, pure electric vehicles are more powerful and smarter. There are more low-voltage controllers and sensors on the vehicle, and the low-voltage load consumes more power. After the network is dormant, the static current is relatively large, and the energy of the low-voltage battery is limited. After the vehicle is turned off and powered off for a long time, the battery power is gradually exhausted, and power feeding occurs; second, the vehicle network fails. After the user stops and powers off, the CAN network Not sleeping normally, many controllers are still in the wake-up state, the power is relatively high and consumes more power, causing the low-voltage battery to be exhausted quickly, and power feeding occurs; third, individual users use the car improperly, such as leaving the car door open for a long time or Frequent startup and shutdown of the vehicle causes the vehicle to not sleep for a long time, and many controllers are still in the wake-up state. The power is high and the power consumption is high, causing the low-voltage battery to be exhausted quickly, and power feeding occurs.

[0003] In order to solve the problem of low-voltage battery feeding, the usual practice is to configure a battery with a larger capacity, and some even use two low-voltage batteries, but it cannot fundamentally eliminate the problem of feeding

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