Charging and discharging control method for battery of hybrid electric automobile

A technology of electric vehicles and hybrid power, which is applied in the field of battery charging and discharging control, and can solve the problems of low operating efficiency

Inactive Publication Date: 2016-05-04
SUZHOU BD ENVIRONMENTAL PROTECTION
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a battery charging and discharging control method for hybrid electric vehicles, by establishing a static state of charge model, a dynamic state of charge model, and setting a static charge threshold according to the static state of charge model , monitoring the static state of charge and the dynamic state of charge of the low-voltage

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  • Charging and discharging control method for battery of hybrid electric automobile

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] In the first embodiment, as in figure 1 shown, including the following steps:

[0023] S1. Establish a static state of charge model for low-voltage batteries, the static state of charge is the total amount of electricity Q that the battery can discharge under the current temperature and humidity n The ratio Q to the total amount of electricity that can be released when the battery is fully charged, that is

[0024] S2. Conduct tests on low-voltage batteries and establish a dynamic state-of-charge model. The dynamic state-of-charge represents the state of charge and discharge on the electrode surface of the low-voltage battery, and obtain dynamic state-of-charge and instantaneous current, low-voltage battery voltage, and low-voltage battery voltage variat...

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Abstract

The invention relates to a charging and discharging control method for a battery of a hybrid electric automobile. The control method includes the following main steps that a static state-of-charge model and a dynamitic state-of-charge model are established; a static charge threshold value is set according to the static state-of-charge model; the static state of charge and the dynamitic state of charge of the low-voltage battery are monitored in real time; a voltage set point of a current throttling device is set according to the static state of charge; the output voltage of the current throttling device is set according to the voltage set point; and charging and discharging of the low-voltage battery under the current condition are controlled according to the dynamitic state of charge. By the adoption of the method, the electric power supplied by a high-voltage power battery to the low-voltage battery can be in an excellent state and the energy use rate of the high-voltage power battery is increased.

Description

technical field [0001] The invention relates to the field of hybrid electric vehicles, in particular to a battery charging and discharging control method for hybrid electric vehicles. Background technique [0002] With the continuous deterioration of the global environment and the shortage of energy sources, reducing air pollution and dependence on petroleum energy has become an issue of increasing concern to all countries. In order to reduce environmental pollution and relieve energy pressure, research on energy-saving and environment-friendly automobiles has become an inevitable trend in the development of automobile industry in various countries. At present, the research and production of electric vehicles has become the first choice of the automobile industry in various countries. [0003] Typically, a hybrid electric vehicle includes two electrical energy storage packages: a high-voltage traction battery and a low-voltage battery. The high-voltage power battery usuall...

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Application Information

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IPC IPC(8): B60L11/18
CPCB60L58/12B60L58/14B60L2240/547B60L2240/549Y02T10/70
Inventor 张金龙
Owner SUZHOU BD ENVIRONMENTAL PROTECTION
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