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An emergency charging circuit for batteries used in motor vehicles

An emergency charging and battery technology, applied in the field of rail transit, can solve the problems of complex charging structure, and achieve the effects of simple circuit structure, protection of universal DC power supply, and convenient use.

Active Publication Date: 2020-07-03
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the battery charging problem of electric locomotives, a combination of power conversion modules, circuit breakers and multiple contactors is used, and the charging structure is relatively complicated

Method used

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  • An emergency charging circuit for batteries used in motor vehicles

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Embodiment Construction

[0022] Hereinafter, specific embodiments of the present invention will be further described in conjunction with the accompanying drawings.

[0023] The invention provides an emergency charging circuit for a motor vehicle battery, which is applied to the emergency power supply of the motor vehicle, and uses the motor vehicle on-board charger to charge the battery without resorting to external special charging equipment. The circuit structure is simple, and the operation greatly saves maintenance. cost and time.

[0024] The emergency charging circuit structure of the motor vehicle storage battery provided by the present invention is as follows: figure 1 As shown, it includes a universal DC power supply 1, a charger controller 5, an on-board charger 6 and a storage battery 7; it is also equipped with an anti-reverse diode 2, an emergency start switch 3, and a DC contactor 4; It is connected to the positive output of the universal DC power supply 1, and its cathode is connected ...

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Abstract

The invention discloses an emergency charging circuit of a storage battery for a motor vehicle, belongS to the technical field of rail transit. When the battery of EMU is over-discharged, the severelyfed battery is charged by means of the on-board charger of the EMU, the specific scheme is to close the emergency start switch, the universal power supply is supplied to the contactor coil through apower supply loop composed of an anti-reflection diode and a closed emergency switch-. After the contactor is energized, the feedback contact is closed. The charger controller controls the on-board charger to output high-power DC voltage to start charging the battery. When the battery voltage is full, the emergency start switch is disconnected to cut off the power supply circuit of the universal power supply and end the emergency charging process. An emergency startup power supply circuit is designed in an existing converter of a motor car, and only one contactor is used to charge the accumulator without external special charging equipment. The circuit structure is simple, the operation is convenient, and the maintenance cost and time are saved.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an emergency charging circuit for batteries used in motor vehicles. Background technique [0002] When the EMU is in normal pantograph operation, the on-board charger equipment supplies power to the DC equipment of the whole car, and at the same time charges the on-board battery. When the EMU is not bowed, the on-board charger cannot work without input power. At this time, the electric energy stored in the battery supplies power to the DC load of the whole vehicle. However, if there is an emergency situation in which the electric energy stored in the storage battery is severely fed or exhausted, the storage battery must be charged, otherwise the entire vehicle equipment will not work normally. Most of the current practices are to use special charging equipment to charge the storage battery from the outside, and then remove the charging equipment after the charging is comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L53/20B60L53/00
CPCB60L2200/26Y02T10/70Y02T10/7072Y02T90/14
Inventor 张春磊杜广群吴强杨志浩潘景宇邵立伟
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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