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Method and device for power state estimation of power battery system

A technology of power state and power battery, applied in the direction of measurement device, measurement of electricity, measurement of electricity variables, etc., can solve the problem of inability to adapt to battery SOP estimation, etc., and achieve the effect of improving estimation accuracy

Active Publication Date: 2018-11-23
JASMIN INT AUTO RES ANDDEV BEIJING CO LTD
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Problems solved by technology

The above two methods are based on the estimation method of the battery internal resistance model. The model is relatively simple and can only be adapted to the SOP estimation under the stable working condition of the battery, but cannot be adapted to the SOP estimation during the dynamic charging and discharging process of the battery.

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  • Method and device for power state estimation of power battery system
  • Method and device for power state estimation of power battery system
  • Method and device for power state estimation of power battery system

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Embodiment Construction

[0045] 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 of the embodiments of the present invention, not all of them. 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.

[0046] figure 1 is a schematic flowchart of a power state estimation method for a power battery system in an embodiment of the present invention, as shown in figure 1 As shown, the method includes the following steps:

[0047] S1: Obtain the maximum output power of the battery pack under different states of charge at the preset temperature.

[0048] S2: Obtain a first preset coefficient according to the equivalent internal resistance of the bat...

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Abstract

The invention provides a method and device for estimating the power state of a power battery system, and the method comprises the steps: obtaining the maximum output power of a battery pack under the preset temperature in different electrical charge states; obtaining a first preset coefficient according to the equivalent internal resistance of the battery pack under different temperatures; and estimating the output power of the battery pack according to the first preset coefficient and the maximum output power. The method does not need a battery internal resistance model, can achieve the estimation of the power of a battery in a dynamic charging and discharging process of the battery, and effectively improves the SOP estimation precision.

Description

technical field [0001] The present invention relates to the technical field of battery power state estimation, in particular to a power state estimation method and device for a power battery system. Background technique [0002] As a backup power source, batteries have been widely used in communications, power systems, military equipment, electric vehicles and other fields. As the concept of environmental protection is deeply rooted in the hearts of the people, more and more systems begin to use batteries as the main power supply. In these systems, lithium-ion batteries have become one of the mainstream power sources for new energy vehicles, and their working conditions are directly related to the operational reliability of the entire system. In order to ensure the good performance of the battery and prolong the service life of the battery, it is necessary to know the operating status of the battery in a timely and accurate manner, and to manage and control the battery reas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
CPCG01R31/382
Inventor 陈言平张毅梁慧升葛雄飞吴红张渤
Owner JASMIN INT AUTO RES ANDDEV BEIJING CO LTD
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