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Low-temperature vehicle starting method and device

A vehicle, low-temperature technology, applied in the field of vehicle starting at low temperature, can solve the problems of the power battery unable to meet the starting demand, the slow chemical reaction of the power battery, and the breakdown of the vehicle.

Active Publication Date: 2018-06-29
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the cold winter, since the power battery is not equipped with heating equipment such as a warmer, when the vehicle is cold started, the battery temperature is low, the chemical reaction inside the power battery is slow, the power of the power battery is limited, and the power battery cannot meet the starting requirements. demand, resulting in vehicle breakdown or traffic jams, etc.
[0003] In the prior art, the TM drive motor is usually driven directly by the engine, but the target matching engine motor is small, and the TM drive motor cannot be directly driven by the engine to start the vehicle. If it is replaced with an engine with a larger motor, the cost higher

Method used

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  • Low-temperature vehicle starting method and device

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] refer to figure 2 , which shows a schematic flowchart of a method for starting a vehicle at low temperature provided by an embodiment of the present invention, which is characterized in that it includes:

[0050] S101: After receiving the starting signal of the vehicle, determine the starting power;

[0051] In this embodiment, the triggering conditions of the start signal of the vehicle include: the engine is started, and the vehicle is in gear. Whe...

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Abstract

The invention discloses a low-temperature vehicle starting method and device. The method includes the steps: determining starting power when receiving vehicle starting signals; controlling an engine to drive an ISG motor to generate power and controlling the ISG motor to drive a TM driving motor when the electric quantity of a power battery is larger than a preset electric quantity threshold value, power provided by the power battery at current temperature cannot meet the starting requirement of a vehicle and the temperature of the power battery is lower than a preset temperature threshold value. Therefore, vehicle starting can be ensured at the low temperature of the power battery without additionally increasing a power assembly or hardware configuration of the whole vehicle. Moreover, after the vehicle is started, the power battery is slightly charged and discharged, the temperature of the power battery is rapidly improved, so that the power battery directly supplies power for the TMdriving motor in next starting, and the vehicle is started.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a method and device for starting a vehicle at low temperature. Background technique [0002] For hybrid direct drive hybrid vehicles, such as figure 1 , shows the schematic diagram of the series hybrid power system. Under normal circumstances, the vehicle starts to supply power to the TM drive motor through the power battery to drive the TM drive motor. However, in the cold winter, because the power battery is not equipped with heating equipment such as a warmer, when the vehicle is cold started, the battery temperature is low, the chemical reaction inside the power battery is slow, the power of the power battery is limited, and the power battery cannot meet the starting requirements. demand, resulting in vehicle breakdowns or traffic jams. [0003] In the prior art, the TM drive motor is usually directly driven by the engine, but the target matching engine motor is small, and th...

Claims

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Application Information

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IPC IPC(8): B60L11/12B60W20/00B60W30/18B60W10/26B60W10/06B60W10/08B60L50/15
CPCB60L50/15B60W10/06B60W10/08B60W10/26B60W20/00B60W30/18009B60W2510/246B60W2520/10B60W2710/0644B60W2710/08B60W2710/246Y02T10/62Y02T10/70Y02T10/7072
Inventor 邓金涛时艳茹王彦波韩福强吴学强李强
Owner WEICHAI POWER CO LTD
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