A chopper-based charger circuit for vehicle power battery pack
A technology for power storage batteries and chargers, applied in battery circuit devices, current collectors, circuit devices, etc., can solve problems such as large voltage fluctuations, failure to detect voltage, long charging time, etc., and achieve the effect of strong anti-interference ability
Active Publication Date: 2018-08-21
XIAN RVNUO NEW ENERGY
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Problems solved by technology
[0003] In terms of battery chargers, the main chargers currently on the market have the following disadvantages: long charging time, susceptible to noise interference, large voltage fluctuations, unable to detect voltage in real time, and there are many problems
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[0014] Such as figure 1 As shown, a chopper-based vehicle power battery pack charger circuit at least includes: an input voltage detection unit 1, a pre-charging circuit unit 2, a first LC filter circuit 3, and a PWM (Pulse Width Modulation) pulse chopper unit 4 , the current sensor 5 and the output voltage detection unit 6, the two ends of the input voltage terminal 11 are electrically connected to the input voltage detection unit 1, the input voltage terminal 11 is electrically connected to the first LC filter circuit 3 after passing through the pre-charging circuit unit 2, and the first LC filter circuit 3. The output terminal is connected in series with the PWM pulse chopping unit 4. The PWM pulse chopping unit 4 performs pulse width modulation on the input voltage. The output terminal of the PWM pulse chopping unit 4 is connected to the current sensor 5 and the output voltage detection unit 6; the input voltage detection unit 1 , the pre-charging circuit unit 2, the PWM ...
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The invention relates to a vehicle-mounted storage battery set charger circuit based on chopped waves. The vehicle-mounted storage battery set charger circuit based on the chopped waves at least comprises an input voltage detecting unit (1), a pre-charging circuit unit (2), a first LC filter circuit (3), a PWM pulse driving unit (4), a current sensor (5) and an output voltage detection unit (6). The vehicle-mounted storage battery set charger circuit based on the chopped waves is mainly used for charging a vehicle-mounted storage battery set of an electric motor coach or a double-source trolley bus. According to the vehicle-mounted storage battery set charger circuit based on the chopped waves, a semiconductor device IGBT module serves as the core of a main circuit, and an embedded intelligent analogue integrated circuit is adopted for real-time control; the anti-jamming capability is strong, charging is achieved with a constant-current and voltage-limiting method, the maximum voltage is limited by the floating charge voltage, and a storage battery is prevented from being overcharged; the vehicle-mounted storage battery set charger circuit based on the chopped waves has a CAN bus communication function and can achieve real-time monitoring of charging and discharging of the storage battery.
Description
technical field [0001] The invention belongs to a circuit diagram of a charger, in particular to a chopper-based charger circuit for a vehicle-mounted power storage battery pack. Background technique [0002] In the prior art, DC chopping is used to convert a fixed DC voltage into a variable DC voltage, which is also called DC / DC conversion. The idea of chopper chopping DC is: if you change the operating frequency of the switch, or change the time ratio of the DC current on and off, you can quickly and effectively change the average value of voltage and current applied to the load. [0003] In terms of battery chargers, the main chargers currently on the market have the following disadvantages: long charging time, susceptible to noise interference, large voltage fluctuations, unable to detect voltage in real time, and there are many problems. Contents of the invention [0004] The purpose of the present invention is to provide a power supply bus designed for strong inte...
Claims
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IPC IPC(8): H02J7/00H02M3/155
Inventor 龚丽君
Owner XIAN RVNUO NEW ENERGY