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① Composition: In slow charge mode, the charging system is mainly composed of power supply equipment (charging pile), slow charge interface, vehicle charger, high voltage control box, power battery, vehicle controller (VCU), BMS, high voltage harness and low voltage harness
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② Slow charging interface
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The charging interface of the AC charging pile is a connector that physically connects the charging pile with the slow charging interface of the electric vehicle to complete charging and control guidance. When you open the charging cover, you can see the 7-hole interface
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L: AC power supply (live wire)
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NC1: standby contact 1
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NC2: standby contact 2
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N: AC power supply (neutral line)
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PE: Body ground: Connect the ground wire of the power supply device and the ground wire of the chassis of the body
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CC -- Charge connection confirmation
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CP -- Control connection validation
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2. How it works
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① The charging gun connection is fed back to the vehicle controller through the vehicle charger (charger), and the connection status is displayed in the wake up instrument. CC line
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② The charger wakes up the vehicle controller and power battery management module at the same time. CP line
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③ The vehicle controller wakes up the instrument to start displaying the charging state
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(4) The positive and negative main relays are issued by the vehicle controller, and the power battery management module controls the main and negative relays
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In slow charge mode, after the charging pile confirms the signal through CC connection, switch S1 switch from 12V end to PWM end; When the voltage of detection point 1 drops to 6V, the K1\/K2 switch of charging pile closes the output power supply
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3. Charging control process
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① AC power supply
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② Charge wake up
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③BMS detects charging demand
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④ The BMS sends working instructions to the car charger and closes the relay
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⑤ The car charger begins to work and charge
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⑥ After battery detection and charging is completed, send stop instructions to the car charger
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⑦ Car charger stops working
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⑧ Battery disconnect relay
Slow charging of new energy vehicles refers to the charging of vehicles through AC power supply (AC). The following is the basic principle of slow charging of new energy vehicles:
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1. The charger converts alternating current to direct current: The charger converts electrical energy from the AC power supply to direct current, and the voltage and current of direct current can be adjusted according to the requirements of the vehicle.
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2. Direct current into the battery pack: The converted direct current into the battery pack, through the battery management system (BMS) to monitor and manage the battery to ensure the safety and effectiveness of the charging process.
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3. Battery charging: With the entry of direct current, the battery begins to charge, until the battery capacity reaches the set value of charging or the charging time reaches the set time, the charging process ends.
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It should be noted that the slow charging speed of new energy vehicles is relatively slow, and it usually takes several hours or even longer to fully charge the battery. However, compared with high-speed charging methods such as fast charging and super charging, slow charging has less damage to the battery, and can also take advantage of the longer charging time to allow the vehicle to complete charging during parking, improving the convenience and economy of charging.
1 New energy slow charging motor is a more common electric vehicle charging equipment, which has a high application value in the current market.
2 The principle is to control the charging voltage and current, use DC power to convert alternating current into direct current, and transfer the electric energy to the electric vehicle battery pack through the charging interface, so as to realize the charging of electric vehicles.
3 The new energy slow charging motor has the advantages of long charging time but stable charging mode, which is suitable for setting up in families, companies and other places to facilitate the daily use of electric vehicles.