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Method, device and vehicle for lower limit control of power battery state of charge

A power battery, state-of-charge technology, applied in battery/fuel cell control devices, control devices, hybrid vehicles, etc., can solve problems affecting the normal use of vehicles

Active Publication Date: 2022-07-15
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the lower limit of the state of charge (State of Charge, SOC) of the power battery used in hybrid vehicles is fixed during the use of the vehicle. As a result, the low SOC value of the battery is not enough to enable the vehicle to start normally at low temperature, thus affecting the normal function of the vehicle after the next power-on

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  • Method, device and vehicle for lower limit control of power battery state of charge
  • Method, device and vehicle for lower limit control of power battery state of charge
  • Method, device and vehicle for lower limit control of power battery state of charge

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Embodiment Construction

[0032] 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.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0034] figure 1 This is a flowchart of a method for controlling the lower limit of the state of charge of a power battery provided by an embodiment of the present invention. like figure 1 As shown, the control method includes:

[0035] Step S11, detecting the minimum ambient temperature and the minimum power battery temperature for at least a period of time;

[0036] Specifically, the ambient temperature and the power battery temperature can be detected by using a temperature sensor, and then the minimum ambient temperature and the minimum power battery temperature can be calculated after storage. The at least period of time can be, for example, a period of time, such as...

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Abstract

The invention relates to the technical field of new energy vehicles, and provides a method, a device and a vehicle for controlling the lower limit of the state of charge of a power battery. The method for controlling the lower limit of the state of charge of the power battery according to the present invention includes: detecting the lowest ambient temperature and the lowest power battery temperature in at least a period of time; and predicting the The minimum power battery temperature within a preset period of time after at least a period of time; according to the minimum power battery temperature within the preset period of time, it is determined that the engine of the vehicle can meet the requirements of the minimum power battery temperature within the preset period of time Start the minimum state of charge value of the power demand; according to the minimum state of charge value, adjust the lower limit of the state of charge. The invention can ensure that the SOC value of the battery can enable the vehicle to start normally in a low temperature environment.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method, device and vehicle for controlling the lower limit of the state of charge of a power battery. Background technique [0002] With the increasing emergence of energy crisis and environmental pollution, hybrid vehicles have become an important direction for the development of the automotive industry due to their outstanding advantages in energy saving and environmental protection. At present, the lower limit of the state of charge (SOC) of the power battery used in hybrid electric vehicles is fixed during the use of the vehicle. As a result, the low SOC value of the battery is not enough to enable the vehicle to start normally at low temperature, thereby affecting the normal function use of the vehicle after the next power-on. SUMMARY OF THE INVENTION [0003] In view of this, the present invention aims to provide a lower limit control method, device and veh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/12
CPCB60L58/12B60L2240/44B60L2240/545B60L2240/54B60L2240/80B60L2240/662B60L58/13B60W20/13H02J7/0048B60W2555/20B60W2510/244B60W2510/246B60W2710/244H01M10/425H01M10/486H01M2010/4271H01M2220/20H02J7/0047
Inventor 赵晴陈淑江
Owner GREAT WALL MOTOR CO LTD