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Power battery charging control method and device

A technology of power battery and control method, which is applied in the direction of control device, battery/battery traction, secondary battery charging/discharging, etc., and can solve problems such as increased engine torque value, large engine load, and engine flameout

Active Publication Date: 2020-05-12
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the prior art, when the engine speed becomes the target speed value, the power generation torque value of the motor is also gradually increasing to the target power generation torque value
The increase of the motor's power generation torque value will lead to the increase of the engine torque value, so it may cause the engine torque value corresponding to the current engine speed value to be too large when the engine speed becomes the target speed value, causing the engine load to be too large. engine stall

Method used

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  • Power battery charging control method and device
  • Power battery charging control method and device

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Embodiment approach

[0077] Optionally, see Figure 5 , in a specific embodiment of the present application, an implementation of step S101 includes:

[0078] S501. Send a rotational speed control mode instruction to the engine controller, so that the rotational speed value of the engine is controlled by the vehicle controller.

[0079] The engine controller has the function of continuously monitoring and controlling the normal operation of the engine, and the engine speed is controlled by the engine controller. When the engine controller receives the rotation speed control mode instruction, the rotation speed value of the engine is controlled by the vehicle controller.

[0080] Specifically, see Figure 6 , the engine controller and the vehicle controller are connected through a Controller Area Network (CAN) bus. The interactive commands between the engine controller and the vehicle controller are transmitted through the CAN bus. After the vehicle controller sends the speed control mode comma...

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Abstract

The application discloses a power battery charging control method and device. The method comprises the steps: controlling a rotating speed value of an engine to be a target rotating speed value when avehicle enters a parking power generation state; correspondingly adjusting a power generation torque value of the motor according to a current rotating speed value of the engine under the condition that the obtained rotating speed value of the engine is determined to be smaller than the target rotating speed value; when the current rotating speed value of the engine is changed to be the target rotating speed value, controlling the power generation torque value of the motor to be the target power generation torque value. The larger the current rotating speed value of the engine is, the largerthe correspondingly adjusted power generation torque value of the motor is. Since the power generation torque value of the motor is adjusted through the current rotating speed value in the process that the rotating speed value of the engine is changed into the target rotating speed value, the engine torque value corresponding to the current rotating speed value of the engine is ensured not too large, and then the engine cannot be shut down due to too large loads.

Description

technical field [0001] The present application relates to the technical field of electromechanical control, in particular to a control method and device for charging a power battery. Background technique [0002] When the hybrid vehicle is in a parked state, the vehicle controller in the vehicle will control the vehicle to enter the parking state to generate electricity. Parking power generation means that when the hybrid vehicle is in a parked state, the engine drives the motor to generate electricity to charge the power battery in the vehicle. The vehicle controller realizes the charging of the power battery in the vehicle by controlling the rotational speed of the engine to the target rotational speed value and controlling the power generation torque of the electric motor to the target power generation torque value. [0003] However, in the prior art, when the engine speed becomes the target speed value, the power generation torque value of the electric motor is also gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L50/62B60L15/20B60L53/00H01M10/44
CPCB60L15/20B60L2240/423B60L2240/441B60L50/62B60L53/00H01M10/446H01M10/448Y02E60/10Y02T10/62Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 张佳骥袁清赵国强连凤霞
Owner WEICHAI POWER CO LTD
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