Electric vehicle battery safety early warning method and system

A technology for electric vehicles and battery safety, applied in electric vehicles, battery/fuel cell control devices, electrical devices, etc., can solve problems such as no consideration, data not car data, etc., and achieve the effect of avoiding failures

Pending Publication Date: 2021-10-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
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But these methods do not consider the influence of SOH and

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  • Electric vehicle battery safety early warning method and system
  • Electric vehicle battery safety early warning method and system
  • Electric vehicle battery safety early warning method and system

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Embodiment Construction

[0072] 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.

[0073] The object of the present invention is to provide a battery safety warning method and system for an electric vehicle, so as to realize the battery safety warning according to the actual condition of the battery of the electric vehicle.

[0074] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawin...

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Abstract

The invention relates to an electric vehicle battery safety early warning method and system. The method comprises the following steps: acquiring a single voltage and an instantaneous current of an electric vehicle battery; determining the Shannon entropy of each battery monomer according to the monomer voltage; determining the ohmic resistance of the battery monomer according to the monomer voltage and the transient current; determining the charging power of each single battery according to the instantaneous current; determining the probability density of the battery according to the Shannon entropy, the ohmic resistance, the charging power and the transient current; and determining whether the battery has a safety problem according to the probability density. Safety early warning of the battery is realized according to the actual condition of the battery of the electric vehicle.

Description

technical field [0001] The invention relates to the field of electric vehicle batteries, in particular to an electric vehicle battery safety warning method and system. Background technique [0002] In recent years, due to the increasingly serious environmental pollution and energy shortage problems, both at home and abroad have increased the promotion and research and development of new energy vehicles, and the new energy vehicle industry is booming. Lithium-ion has been widely used in electric vehicles due to its high energy density, long cycle life, and no memory effect. [0003] In order to meet the battery capacity and total voltage requirements of electric vehicles, hundreds of batteries need to be connected in parallel or in series. During the actual operation of electric vehicles, battery performance is constantly affected by internal and external factors such as battery grouping, state of health (SOH) and driving behavior. As the number of charging and discharging ...

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Application Information

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IPC IPC(8): B60L58/12B60L3/00
CPCB60L58/12B60L3/0046Y02T10/70
Inventor 张照生王震坡李达刘鹏张普琛林倪
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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