Emergency power-on circuit and method and car

A relay circuit and circuit technology, which is applied to electric vehicles, battery circuit devices, circuit devices, etc., can solve the problems that the car cannot be powered on and start, and achieve the effect of improving the reliability of use
CN107994631AInactive Publication Date: 2018-05-04BEIJING ELECTRIC VEHICLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING ELECTRIC VEHICLE
Publication Date
2018-05-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an emergency power-on circuit and method and a car. The emergency power-on circuit comprises a power battery pack, a battery management system, a relay circuit, a first DC / DC convertor, a second DC / DC convertor and an emergency switch circuit. The first DC / DC convertor, the second DC / DC convertor and the battery management system are separately connected to the two poles ofthe power battery pack; the emergency switch circuit is connected with the first DC / DC convertor; the output end of the first DC / DC convertor is connected with the battery management system, and whenthe first DC / DC convertor is turned on, the output voltage of the power battery pack is converted by the first DC / DC convertor into a first low voltage, so that power is supplied to the battery management system, and the battery management system is waked up; the relay circuit is connected between the second DC / DC convertor and the power battery pack in series, and the battery management system isconnected with the relay circuit and the second DC / DC convertor. By means of the emergency power-on circuit, power-on of the car can be achieved under the condition that a storage battery is undervoltage or is damaged, and the use reliability of the car is improved.
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Description

technical field

[0001] The invention relates to the technical field of automobiles, in particular to an emergency power-on circuit, method and automobile. Background technique

[0002] With the continuous development and progress of automobile technology and the continuous increase of car ownership, cars have become an indispensable part of people's daily life. Existing, in the use of electric vehicles, due to problems such as charging and discharging of the car, the battery of the car may be undervoltage or damaged; as one of the important components of the car, the battery needs to be supplied to the controller when the car is started. , relays, etc., so that the car can be powered on and started normally. Therefore, when the battery is undervoltage or damaged, the car will not start normally. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide an emergency power-on circuit, method and automobile to solve the prob...

Claims

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