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Low temperature control method and device for hybrid vehicle

A hybrid vehicle and control method technology, applied in the field of vehicles, can solve the problems of electric energy storage, decreased battery charge and discharge capacity, poor performance of hybrid vehicles, etc.

Active Publication Date: 2022-07-19
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the temperature is relatively low, the charging and discharging capacity of the battery drops sharply, and it is difficult for the vehicle to store electric energy in the battery pack when decelerating or braking, causing the battery pack to stay in a low temperature state for a long time, making it difficult to participate in normal work, resulting in hybrid poor car performance

Method used

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  • Low temperature control method and device for hybrid vehicle
  • Low temperature control method and device for hybrid vehicle

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Embodiment Construction

[0028] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] figure 1 It is a flowchart of a low temperature control method for a hybrid vehicle provided by an embodiment of the present invention. like figure 1 As shown, the control method includes:

[0031] Step S11, detecting the temperature of the battery pack of the hybrid vehicle;

[0032] Specifically, for example, the temperature of the battery pack can be detected by a temperature sensor or the like.

[0033] Step S12, when it is detected that the temperature of the battery pack is lower than a preset temperature, the requested torque of the accelerator pedal of the hybrid vehicle is detected;

[0034] Specifically, taking a lithium battery as an example, when th...

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Abstract

The invention relates to the technical field of vehicles, and provides a low temperature control method and device for a hybrid vehicle. The control method of the present invention includes: detecting the temperature of the battery pack of the hybrid vehicle; when detecting that the temperature of the battery pack is lower than a preset temperature, detecting the requested torque of the accelerator pedal of the hybrid vehicle; When judging that the requested torque is greater than the maximum torque that the motor can output, control the motor to output the maximum torque, and control the engine of the hybrid vehicle to output the difference between the requested torque and the maximum torque that the motor can output of torque to drive the hybrid vehicle. The invention can rapidly increase the temperature of the battery and effectively improve the performance of the hybrid vehicle.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a low temperature control method and device for a hybrid vehicle. Background technique [0002] At present, the torque distribution between the motor and the engine in a hybrid vehicle is mainly as follows: when the requested torque is greater than the output torque at the optimum efficiency of the engine, the engine is controlled to output torque according to the optimum efficiency, and the remaining torque is output by the motor. When the requested torque is not greater than the output torque at the optimum efficiency of the engine, the engine is controlled to output torque according to the optimum efficiency, and then the motor converts the excess mechanical energy of the engine into electrical energy and stores it in the battery pack. However, when the temperature is relatively low, the charging and discharging capacity of the battery drops sharply, and it is difficult for t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/25B60L15/20B60W20/15B60W10/06B60W10/08
CPCB60L58/25B60L15/20B60W20/15B60W10/06B60W10/08B60L2240/423B60L2240/545B60W2510/246B60W2710/0666B60W2710/083Y02T10/72
Inventor 胡志敏
Owner GREAT WALL MOTOR CO LTD
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