Power supply control circuit for electric vehicle battery management system

A technology of power control circuit and battery management system, which is applied in the direction of battery/fuel cell control devices, electric vehicles, vehicle components, etc., and can solve problems such as increased power consumption of diodes, low reliability of power supply circuits, and heat generation

Active Publication Date: 2020-11-17
湖南容创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power supply circuit of the traditional electric vehicle battery management system uses a diode to prevent the reverse connection of the power supply. The power consumption is doubled, and there is a problem of serious heating when the load is large. The power circuit of the battery management system of the traditional electric vehicle has the disadvantage of low reliability.

Method used

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  • Power supply control circuit for electric vehicle battery management system
  • Power supply control circuit for electric vehicle battery management system
  • Power supply control circuit for electric vehicle battery management system

Examples

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0019] In one embodiment, a power supply control circuit of a battery management system of an electric vehicle is provided, and the electric vehicle may specifically be an electric vehicle or the like. Such as figure 1 As shown, the power supply control circuit includes a power supply detection circuit 110, a control signal circuit 120, and two or more field effect transistor drive circuits 130, and the input terminals of each field effect transistor drive circuit 130 are respectively used to connect different types of charging Power supply, the control terminals of each ...

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PUM

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Abstract

The present application relates to a power supply control circuit for an electric vehicle battery management system. The power supply control circuit includes a power detection circuit, a control signal circuit and two or more field effect transistor (FET) driving circuits, wherein the input terminal of each FET driving circuit is used for connecting different types of charging power supplies; thecontrol terminal of each FET driving circuit is connected with a control signal circuit; the output terminal of each FET driving circuit is connected with a power supply of the control circuit; the power supply detection circuit is used for connecting the charging power supply and the external controller, and the control signal circuit is used for connecting the external controller; the output voltage of the external power supply is detected by the power supply detection circuit; the control signal circuit controls the field effect transistor driving circuits of the charging power source withthe highest output voltage to conduct, and the charging power source with the highest output voltage supplies power to the control circuit; and by means of the low conduction resistance of the fieldeffect transistor during conducting, the heat loss can be effectively reduced when passing through the large current, thus improving the reliability and stability of the system.

Description

technical field [0001] The present application relates to the technical field of charge management, in particular to a power supply control circuit of an electric vehicle battery management system. Background technique [0002] Electric vehicles refer to transport vehicles that use electric energy as the driving force and are driven by traction motors. Common electric vehicles mainly include railway trunk line electric vehicles, subway electric vehicles, urban trams, light rail electric vehicles, battery electric vehicles, etc. [0003] In the power circuit of the battery management system of electric vehicles, in order to prevent users from improper operation such as reverse connection of the power supply during use, diodes are often used to prevent reverse connection to ensure the reliability of the battery management system. The power supply circuit of the traditional electric vehicle battery management system uses a diode to prevent the reverse connection of the power su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60L58/10
CPCB60L3/0046Y02T10/70
Inventor 陈翔林勇周显宋
Owner 湖南容创科技有限公司
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