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Intelligent low-voltage auxiliary power device, method and off-board charger

A technology of auxiliary power supply and charger, applied in the direction of circuit devices, battery circuit devices, secondary battery charging/discharging, etc., can solve the problems of resource waste, inconvenient use, hindering the development and popularization of electric vehicles, etc., to save social capital, Ease of use

Pending Publication Date: 2017-06-30
SHENZHEN EN PLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-voltage auxiliary DC voltage provided by off-board chargers in the prior art is fixed, which results in that the same off-board charger can only charge one type of electric vehicle and cannot be used universally. For example, the low-voltage auxiliary DC voltage The 12V off-board charger can only charge the above-mentioned electric passenger cars, which require a voltage of 12V, and cannot charge electric buses, such as electric buses, which require a voltage of 24V.
[0004] This shortcoming of off-board chargers in the prior art not only causes inconvenience in use and waste of resources, but is also a major problem hindering the development and popularization of electric vehicles

Method used

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  • Intelligent low-voltage auxiliary power device, method and off-board charger
  • Intelligent low-voltage auxiliary power device, method and off-board charger
  • Intelligent low-voltage auxiliary power device, method and off-board charger

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Embodiment 1

[0029] Please refer to figure 2 , this implementation proposes an off-board charger, which includes an AC-to-DC module 40 and an intelligent low-voltage auxiliary power supply device, which will be described separately below.

[0030] The AC-to-DC module 40 is used to convert alternating current to direct current. In one embodiment, the input terminal of the AC-to-DC module 40 is connected to the mains, and the output terminal is connected to pins 1 and 2 of the charging plug 10 .

[0031] The intelligent low-voltage auxiliary power supply device includes an intelligent low-voltage auxiliary power supply 20 and a charger controller 30 . Combine below figure 2 and image 3 Be explained.

[0032] The intelligent low-voltage auxiliary power supply 20 includes a power conversion module 21; the power conversion module 21 is used to convert the input AC voltage into a DC voltage, so as to provide the vehicle controller 50 in the electric vehicle when the off-board charger is c...

Embodiment 2

[0041] The intelligent low-voltage auxiliary power supply device and off-vehicle charger provided in this embodiment are improved on the basis of Embodiment 1, and will be described in detail below.

[0042] Please refer to Figure 4 , in this implementation, the intelligent low-voltage auxiliary power supply device further includes a first switch module K1, and the first switch module K1 is used to turn on and off the power conversion module 21 and the vehicle controller 50 when the off-board charger is connected to the electric vehicle. The electrical connection between them, the first switch module K1 can be integrated in the intelligent low-voltage auxiliary power supply 20 . Correspondingly, the charger controller further includes a switch control module 35, which is used to control the first switch module K1 to be turned on and off. In one embodiment, when the charger controller 30 detects that it is connected with the electric vehicle, it turns on the switch module K1....

Embodiment 3

[0046] This embodiment proposes a method for an intelligent low-voltage auxiliary power supply in an off-vehicle charger, wherein the off-vehicle charger includes a charger controller 30 and an intelligent low-voltage auxiliary power supply 20 .

[0047] Please refer to Figure 5 , this method includes the following steps:

[0048] Step S11 , the charger controller 30 sets the value of the output DC voltage of the intelligent low-voltage auxiliary power supply 20 , wherein the off-board charger is connected to the AC power grid. In one embodiment, the charger controller 30 is preset with several levels of voltage setting values ​​from low to high, and the voltage setting value with a higher level has a larger value; The DC voltage output by 20 is set to the voltage setting value of the lowest level. When the communication signal sent by the vehicle controller 50 is not received, the DC voltage output by the intelligent low-voltage auxiliary power supply 20 is set to a voltage...

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Abstract

The invention discloses an intelligent low-voltage auxiliary power device, a method and an off-board charger. The intelligent low-voltage auxiliary power device comprises an intelligent low-voltage auxiliary power supply and a charger controller, wherein the intelligent low-voltage auxiliary power supply comprises a power conversion module for converting input alternating-current voltage into direct-current voltage; and the charger controller comprises a voltage setting module for setting the value of the direct-current voltage output by the power conversion module, and a communication module for receiving communication signals of a vehicle controller in an electric vehicle. The charger controller sets the output of the intelligent low-voltage auxiliary power supply as direct-current voltage different from the current voltage when not receiving a communication signal of the vehicle controller, and redetects whether the communication signal of the vehicle controller is received, so that direct-current voltage needed by the vehicle controller in the electric vehicle to be charged can be adaptively provided, and the electric vehicle can work normally.

Description

technical field [0001] The present application relates to the field of electric vehicle charging, in particular to an intelligent low-voltage auxiliary power supply device, method and off-board charger. Background technique [0002] As an energy-saving and environmentally friendly green travel tool, electric vehicles are being advocated by more and more countries and regions. Electric vehicles are being chosen by more and more users because the power source used by electric vehicles is electric energy rather than burning gasoline. [0003] In the prior art, when the off-board charger is charging the electric vehicle, it will provide a low-voltage auxiliary DC voltage to the vehicle controller in the electric vehicle as its working voltage. After the vehicle controller receives the low-voltage auxiliary DC voltage, it can It works normally to control the charging-related devices in the electric vehicle, so as to ensure the normal charging of the electric vehicle by the off-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H01M10/44
CPCH01M10/44H02J7/02B60L53/60H02J7/00034Y02E60/10
Inventor 戴国峰
Owner SHENZHEN EN PLUS TECH CO LTD