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Passive equalization control method and system of electric vehicle battery management system

A battery management system, passive equalization technology, applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc., can solve the problems of reduced equalization efficiency, low accuracy and precision, unreasonable opening and closing of equalization, etc. To achieve the effect of ensuring high balance efficiency, accuracy and precision

Active Publication Date: 2021-06-25
DONGFENG MOTOR GRP
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Problems solved by technology

[0004] The present invention provides a passive equalization control method and system of an electric vehicle battery management system, which solves the problems caused by unreasonable opening and closing of the equalization in the related art, which will reduce the equalization efficiency, does not take into account the easy omission of equalization opportunities in the vehicle environment, and the open-loop equalization management causes Issues with low accuracy and precision

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  • Passive equalization control method and system of electric vehicle battery management system
  • Passive equalization control method and system of electric vehicle battery management system
  • Passive equalization control method and system of electric vehicle battery management system

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Embodiment Construction

[0057] The examples of the present invention will now be explained in detail in the drawings. Although the present invention will be described in connection with the specific embodiments, it will be understood that the present invention will be not intended to limit the invention. Instead, it is desirable to override changes, modifications, and equivalents included in the spirit and scope of the invention. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any function block or functional arrangement can be implemented as a physical entity or a logic entity, or a combination of both.

[0058] The present invention will be better understood by those skilled in the art, and the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0059] Note: The examples to be described are only a specific example, and not to limit the embodiments of...

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Abstract

The invention relates to a passive equalization control method and system of an electric vehicle battery management system. The method comprises the steps of acquiring a working mode of the battery system; when the battery system is in a static, quasi-static or external charging mode, acquiring a real-time single body charge state value of the single body battery, and determining a first target equalization single body; controlling the discharge equalization, detecting the change condition of the state of charge of the single body in real time, judging the correctness of equalization response, and controlling the equalization to be closed; when the battery system is in a driving discharge mode, acquiring the real-time single body voltage of the battery single body, and determining a second target equalization single body; and controlling the discharge equalization, detecting the voltage change condition of the single body in real time, judging the correctness of equalization response, and controlling the equalization to be closed. The problems that balance efficiency is reduced due to unreasonable balance opening and closing, the balance opportunity is easy to omit due to the fact that the whole vehicle environment is not considered, and accuracy and precision are low due to open-loop balance management are solved.

Description

Technical field [0001] The present invention relates to the field of battery management, and more particularly to a passive equalization control method and system of an electric vehicle battery management system. Background technique [0002] Battery system balancing technology is an important algorithm function for electric vehicle battery management systems. In an electric car, the battery monomer consistency directly affects the overall performance of the battery pack. If the battery monomer consistency is poor, on the one hand, it will affect the overall performance of the entire battery pack, which affects the performance of the vehicle, leading to the full-vehicle comfort discount. On the other hand, the battery pack of the battery monomer can cause the battery to be overcharged or overlapping, so that the battery is in an incorrect use state, affecting the battery performance and even life. In terms of the above two aspects, it is necessary to guarantee better vehicle dyna...

Claims

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Application Information

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IPC IPC(8): B60L58/12B60L58/14B60L58/16
CPCB60L58/12B60L58/14B60L58/16Y02T10/70
Inventor 吴道明史建鹏冯春赵春来刘敏
Owner DONGFENG MOTOR GRP
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