Method for estimating available power of vehicle power battery

A power battery and power technology, applied in the field of available power estimation of vehicle power batteries, can solve problems such as drop, affect vehicle drivability, reduce output power, etc., to avoid sharp drop in voltage, avoid triggering battery protection, and avoid output power. significantly reduced effect

Active Publication Date: 2018-05-25
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

In extreme cases, using the power estimated by this method will lead to a sharp drop in voltage and trigger b

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  • Method for estimating available power of vehicle power battery
  • Method for estimating available power of vehicle power battery
  • Method for estimating available power of vehicle power battery

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[0034] The object of the present invention is to provide a method for estimating the available power of a power battery for a vehicle, which can effectively avoid the situation that a sharp drop in voltage triggers battery protection, thereby significantly reducing the output power.

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0036] See figure 1 , The method for estimating the available power of a vehicle power battery provided by an embodiment of the present invention includes t...

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Abstract

The invention discloses a method for estimating the available power of a vehicle power battery, and the method comprises the steps: obtaining the data; obtaining an actual charge state of the power battery, and collecting the maximum temperature and minimum temperature of the power battery in the actual charge state; obtaining a corresponding available power when the actual charge state is the same as a preset charge state and the preset temperature is equal to the maximum temperature, and defining the available power as first available power; obtaining a corresponding available power when theactual charge state is the same as a preset charge state and the preset temperature is equal to the minimum temperature, and defining the available power as second available power; taking the power with the smaller absolute value in the first and second available power as an available power basic value, multiplying the available power basic value by a dynamic correcting factor f, and obtaining the available power of the power battery. The method can effectively prevent the sharp drop of a voltage from triggering battery protection and remarkably reducing the output power.

Description

technical field [0001] The invention relates to the technical field of power batteries for new energy vehicles, and more specifically, to a method for estimating the available power of power batteries for vehicles. Background technique [0002] New energy vehicles have outstanding advantages such as low emissions and low fuel consumption. They are an important way to solve energy, environmental protection and other issues today, and are currently a research hotspot in the automotive industry. As an energy storage component of new energy vehicles, power batteries have been widely used. In order to cooperate with automotive applications, it is necessary to develop a battery management system to monitor and record battery operating data and status, estimate the allowable charge and discharge power of the battery, and provide battery-related information for vehicle control strategies. The available power of the battery represents the ability of the battery to output or receive ...

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/3648G01R31/367
Inventor 洪木南丁灿刘波姚振辉
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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