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Electric car battery current limiting protection method and system

A technology of electric vehicles and batteries, applied in the field of automobiles, can solve problems such as shortening battery life and fire

Active Publication Date: 2019-09-27
SHANDONG YIXING ELECTRIC AUTO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of electric vehicles, people pay more and more attention to the safety and life of electric vehicle power batteries. The charging and discharging current of batteries has an important impact on the safety and life of batteries. If the battery is running for a long time In the state of overcurrent, it will shorten the life of the battery, and even cause a fire if it is serious

Method used

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  • Electric car battery current limiting protection method and system
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  • Electric car battery current limiting protection method and system

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] It should be clear that 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 creative efforts fall within the protection scope of the present invention.

[0025] For the convenience of description, the above devices are described by dividing their functions into various units / modules and describing them separately. Of course, when implementing the present invention, the functions of each unit / module can be implemented in one or more pieces of software and / or hardware.

[0026] Such as figure 1 As shown, it is a current limiting protection method for a battery of an electric vehicle described in this aspect, including:

[0027] Step 1, the battery management system BM...

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Abstract

The embodiment of the invention discloses an electric car battery current limiting protection method and system. The method comprises the steps that a battery management system collects current status information of a battery in real time, acquires the busbar voltage of the battery and the busbar current of the battery according to the current status information and the optimal charging current limiting value and the optimal discharging current limiting value suitable for the current status of the battery and transmits the busbar voltage of the battery and the busbar current of the battery, the optimal charging current limiting value and the optimal discharging current limiting value to a finished car control unit; a motor control unit collects the current rotational speed and the current busbar current of a motor and transmits the current rotational speed and the current busbar current of the motor to the finished car control unit; the finished car control unit acquires a first required torque satisfying the optimal charging current limiting value and the optimal discharging current limiting value according to the busbar voltage and the busbar current of the battery, the optimal charging current limiting value, the optimal discharging current limiting value and the current rotational speed and the current busbar current of the motor and transmits the first required torque to an MCU; and the torque of the motor is controlled according to the first required torque and is made to operate according to the first required torque.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a current limiting protection method and system for batteries of electric vehicles. Background technique [0002] With the rapid development of electric vehicles, people pay more and more attention to the safety and life of electric vehicle power batteries. The charging and discharging current of batteries has an important impact on the safety and life of batteries. If the battery is running for a long time If it is in an overcurrent state, it will shorten the life of the battery, and even cause a fire if it is serious. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a battery current limiting protection method and system for an electric vehicle, which can perform dynamic current limiting protection on the battery according to the real-time state of the battery. [0004] A current limiting protection method for a battery of an elec...

Claims

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Application Information

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IPC IPC(8): B60L58/10B60L15/20
CPCB60L58/10B60L15/20B60L2240/421B60L2240/423B60L2240/545B60L2240/549Y02T10/72Y02T10/70
Inventor 崔海贝桑丽艳刘玲玲密伟伟
Owner SHANDONG YIXING ELECTRIC AUTO CO LTD
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