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Electric vehicle and vehicle-mounted charger, charging system and charging method thereof

An on-board charger and charging gun technology, which is applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems of incompatibility with the national standard fast charging at the same time, and the efficiency of fast charging is reduced, and achieves the effect of improving the efficiency of fast charging

Active Publication Date: 2022-01-11
VOYAH AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an electric vehicle and its on-board charger, a charging system and a charging method to solve or partially solve the technical problem that the current on-board charging scheme cannot be compatible with the national standard fast charging and Chaoji fast charging at the same time, resulting in a decrease in fast charging efficiency

Method used

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  • Electric vehicle and vehicle-mounted charger, charging system and charging method thereof
  • Electric vehicle and vehicle-mounted charger, charging system and charging method thereof
  • Electric vehicle and vehicle-mounted charger, charging system and charging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] The structure of the on-board charger used in this embodiment is shown as Figure 6 shown. The Chaoji fast charging input port of the car charger is DC input, and the slow charging input port is single-phase AC input. The on-board charger includes a step-down module 11 (BUCK module), a boost module 10 (PFC module), a resonant circuit 15 (LLC module), an isolation transformer 16 , a rectification output module 17 and a control unit 14 . The first switching device includes a relay K1 and a relay K2. The relay K1 is connected between the positive line behind the fast charge input port and the fire line behind the slow charge input port. The relay K2 is connected between the negative line of the fast charge input end and the zero line of the slow charge input end. between lines. The second switching device includes a relay K3 and a relay K4, the relay K3 is connected to the positive line between the fast charge input port and the fast charge output port, and the relay K4 ...

Embodiment 2

[0143] The structure of the on-board charger used in this embodiment is shown as Figure 8 shown. The Chaoji fast charging input port of the car charger is DC input, and the slow charging input port is single-phase AC input. The on-board charger includes a step-down module 11 (BUCK module), a boost module 10 (PFC module), a resonant circuit 15 (LLC module), an isolation transformer 16 , a rectification output module 17 and a control unit 14 . Wherein, the first switching device includes a relay K1 and a relay K2; the relay K1 is connected between the positive line behind the fast charge input port and the live line behind the slow charge input port, and the relay K2 is connected between the negative line of the fast charge input port and the slow charge input between the neutral lines at the ends. The second switching device includes a relay K3 and a relay K4, the relay K3 is connected to the positive line between the fast charge input port and the fast charge output port, a...

Embodiment 3

[0149] The on-board charger used in this embodiment is based on the first embodiment ( Figure 6 ) hardware structure, the difference is that the slow charge input terminal adopts the attached Figure 4 Three-phase AC input shown. In this embodiment, the fourth switching device is a relay K7, and the fifth switching device is a relay K8.

[0150] When the user uses the Chaoji fast charging pile to charge, the VCU controls the on-board charger to enter the bypass mode (Bypass Mode) after detecting the Chaoji charging pile through the control pilot circuit. The on-board charger prohibits the BUCK module, the PFC module and the LLC module from working, the control relays K1 and K2 are disconnected, and the control relays K3 and K4 are closed. The VCU judges that the charger enters the bypass mode through the status signal reported by the charger, and the VCU controls the Chaoji fast charging pile to output power to charge the power battery.

[0151] When the user uses the nati...

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Abstract

The invention discloses a vehicle-mounted charger, and the charger comprises a boosting module which is connected between a slow charging jack and a battery pack; a step-down module which is connected with the step-up module in parallel; a first switching device which is connected between the quick charging socket and the boosting module; a second switching device which is connected between the quick charging socket and the battery pack; and a control unit which is programmed to be used for controlling the first switching device to be switched off and the second switching device to be switched on in a first fast charging mode; or in the second fast charging mode, controlling the first switching device to be switched on, and controlling the second switching device to be switched off. By means of the vehicle-mounted charger, the vehicle-mounted charger can be compatible with Chaoji fast charging and national standard GB 2015 fast charging at the same time, the requirement that a user uses different types of fast charging piles for fast charging is met, and the fast charging efficiency is remarkably improved.

Description

technical field [0001] The present application relates to the technical field of new energy vehicles, in particular to an electric vehicle and its on-board charger, charging system and charging method. Background technique [0002] With the development of electric vehicles and the improvement of charging efficiency requirements, it is necessary to realize the high-power fast charging function of vehicles, and a feasible direction is to increase the vehicle voltage platform. By increasing the vehicle voltage platform, the charging voltage is increased to increase the charging power. Therefore, super fast charging (Chaoji fast charging, GB / T27930) technology came into being. [0003] Chaoji fast charging piles equipped with high-voltage platforms on the market are still in a pilot state and have not yet been commercialized on a large scale. Therefore, for a foreseeable period of time in the future, there will be a coexistence of national-standard DC piles and Chaoji fast-cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/60B60L53/31
CPCB60L53/60B60L53/31Y02T10/70Y02T10/7072Y02T90/12
Inventor 潘志强张明黄敏
Owner VOYAH AUTOMOBILE TECH CO LTD
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