Power supply with anti-surge function, control method thereof, and vehicle-mounted charger
A control method and anti-surge technology, applied in the direction of efficient vehicle charging, electric vehicle charging technology, charging stations, etc., can solve the problems of damaging related devices, affecting the safety of electric vehicles, and easily generating surge currents, etc., to prevent devices from damage, taking into account start-up efficiency, and the effect of rapid rise in bus voltage
Pending Publication Date: 2021-12-14
SHENZHEN VMAX NEW ENERGY CO LTD
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Problems solved by technology
The on-board charger is a device that completes the charging of the power battery. When it is powered on, it is easy to generate surge current, damage related components and even affect the safety of electric vehicles.
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[0030] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] The invention discloses a power supply with anti-surge function, see figure 1 In the schematic block diagram shown, the power supply includes a sequentially connected PFC module, a DC bus, a DCDC module, and a bus capacitor C1 connected between the positive DC bus and the negative DC bus; it also includes a voltage detection module connected to the input end of the PFC module, The first switch Q1 connected in series with the bus capacitor C1, and a control module; when the power supply is powered on, the control module controls the on-off of the first switch Q1 to limit the surge accordin...
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The invention discloses a power supply with an anti-surge function, a control method thereof, and a vehicle-mounted charger. The power supply with the anti-surge function comprises a PFC module, a DC bus, a DCDC module, and a bus capacitor C1 connected between a positive DC bus and a negative DC bus, and further comprises a voltage detection module connected with the input end of the PFC module, a first switch Q1 connected with the bus capacitor C1 in series, and a control module; when the power supply is powered on, the control module controls the on-off of the first switch Q1 according to the input voltage Vin detected by the voltage detection module so as to limit the surge current; surge current generated in the electrifying process of the vehicle-mounted charger is effectively prevented, the charging current of the charging capacitor can be controlled, the situation that the charging capacitor is damaged due to the fact that the current is too large is prevented, the safety performance of the vehicle-mounted charger is improved, and the service life of the vehicle-mounted charger is prolonged; and on the basis of surge current prevention, the starting efficiency is considered, and the bus voltage can be rapidly increased.
Description
technical field [0001] The invention relates to a power supply circuit, in particular to a power supply with anti-surge function, a control method thereof, and a vehicle charger. Background technique [0002] With the demand for energy saving and emission reduction, as well as the control of air pollution, new energy vehicles are gradually commercialized in the market, and electric vehicles are the main force of new energy vehicles. The on-board charger is a device that completes charging for the power battery. It is prone to generate surge current when it is powered on, damaging related components and even affecting the safety of electric vehicles. [0003] Therefore, how to limit the inrush current to protect the charger when the on-board charger is powered on, and how to make the bus voltage rise rapidly while taking into account the start-up efficiency is a technical problem that needs to be solved urgently in the industry. Contents of the invention [0004] In order ...
Claims
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IPC IPC(8): H02M1/42H02M1/32H02H9/02H02M1/44H02J7/10B60L53/20
CPCH02M1/4225H02M1/32H02H9/025H02M1/44H02J7/06H02J7/007B60L53/20B60L2270/20Y02T10/70Y02T10/92Y02T10/7072Y02T90/14
Inventor 冯颖盈徐金柱魏玮
Owner SHENZHEN VMAX NEW ENERGY CO LTD