Charging device of electric automobile
A charging device and technology for electric vehicles, applied in electric vehicles, battery circuit devices, circuit devices, etc., can solve problems such as accidental injury to the human body, human body injury, and arc generation, and achieve the goal of avoiding arc generation, low cost, and preventing arc generation Effect
Active Publication Date: 2012-05-30
WUHAN ZHONGYUAN ELECTRONICS GRP
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Problems solved by technology
The AC charging can be powered by single-phase 220v sockets that can be seen everywhere, and the power battery in the electric vehicle can be charged through the vehicle-mounted DC charger. accidental bodily injury
At present, many charging plugs adopt the protection method of the shell insulation structure to prevent the arc leakage from contacting the human body, but it has not fundamentally solved the problem of arc generation when plugging and unplugging. Once the shell is damaged, it will still cause damage to the human body.
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[0015] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0016] according to figure 1 It can be seen that an electric vehicle charging device includes an external device 13 and an internal device 14. The external device 13 is located outside the electric vehicle and is mainly responsible for outputting 220V alternating current and generating a square wave 6 with a frequency of 1KHz and an amplitude of 12V. The internal device 14 is located at Inside the electric vehicle, the main function is to automatically detect whether the charging plug 5 is effectively connected to the charging socket 7 through the square wave 6 generated by the external device, and then control the power supply system of the on-board charger 12. The connection relationship is: the charging plug in the external device 13 5 is coupled with the charging socket 7 in the internal device 14.
[0017] The external device 13 includes: a single-phase plug 1, ...
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The invention discloses a charging device of an electric automobile; a charging plug of an external device is connected with a charging socket of an internal device in a coupling way; an AC output end of a single-phase plug is connected with an AC input port of the charging plug, and is connected with an input end of a DC power supply; an output end of the DC power supply is respectively connected with a crystal oscillator reference voltage input end and an optical coupler reference voltage input end; a crystal oscillator output signal port is connected with an optical coupler input port, andan optical coupler output port is connected with a signal port of the charging plug; an AC output port of the charging socket is connected with an AC input port of a contactor; a signal output port of the charging socket is connected with two external interrupt signal ports of a singlechip in parallel by an optical coupler; an I / O output port of the singlechip is connected with a control port of a relay; an output port of the relay is connected with a DC control input end of the contactor; and an AC output port of the contactor is connected with a power supply input port of a vehicle charger.The charging device has simple structure, high feasibility and low cost, and fundamentally guarantees the safety of personnel.
Description
technical field [0001] The invention belongs to the technical field of charging electric vehicles, and more specifically relates to a charging device for electric vehicles, especially suitable for charging power batteries in electric vehicles. Background technique [0002] Electric vehicle charging methods include DC charging and AC charging. DC charging is charged by external large-scale dedicated DC charging equipment, which needs to be charged at a dedicated charging station for electric vehicles. The AC charging can be powered by single-phase 220v sockets that can be seen everywhere, and the power battery in the electric vehicle can be charged through the vehicle-mounted DC charger. Accidental injury to the human body. At present, many charging plugs adopt the protection method of the shell insulation structure to prevent the arc leakage from contacting the human body, but it has not fundamentally solved the problem of arc generation during plugging and unplugging. Once...
Claims
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IPC IPC(8): H02J7/00H02H5/12
Inventor 张东华贺智轶梁曦
Owner WUHAN ZHONGYUAN ELECTRONICS GRP