If you have a headache for urban transportation, the location of the work is not far, and you dont want to squeeze the bus subway, then the electric vehicle is a very good choice.With its convenient travel and low -carbon environmental protection advantages, electric vehicles have entered our lives, but its charging devices failure rate is high.Let me introduce the relevant knowledge of the electric vehicle charger today.
Introduction to electric vehicle charger
Electric vehicle charger is a charging equipment specially configured for the battery of electric bicycles. An important component of an electric vehicle. Once the charger is damaged, the electric vehicle will "difficulty" and then "difficult to walk."Electric vehicle charger can be divided into two types:
The negative pulse charger lead -acid battery has a history of more than 100 years. It has begun to generally lead to old views and operating procedures: the charging and discharge rate is 0.1C, and the life span is long.Americans McS announced to the world in 1967 to charge the pulse current greater than 1C.Discharge is conducive to eliminating polarization, reducing the temperature of electrolyte temperature, and improving the power of the polar board to accept charge.Around 1969, some scientific and technological workers in my country successfully produced a variety of fast chargers based on Mr. Mosss three laws.The charging cycle process is: large current pulse charging → cutting off charging channels → short discharge of batteries → stop discharge → connect charging channels → large -current pulse charging ... Around 2000, some people use this principle into electric vehicle charger.During the charging process, do not cut off the charging path, and use a small resistance to discharge the battery short circuit.Due to the short circuit, because the charging path is not cut off, the inductance is connected in the charging path.Generally, short-circuit 3-5 milliseconds (1 second = 1000 milliseconds) within 1 second. Because the current in the inductance cannot be jumped, the short-circuit time is short, which can protect the power conversion part of the charger.If the charging current is called positive and the discharge is naturally negative, electricity is the so -called "negative pulse charger".
In recent years, the three -stage charger has generally used the so -called three -stage charger. The first stage is called the constant current stage, the second stage is called the constant voltage stage, and the third stage is called the trickle stage.From the perspective of electronic technology, for batteries: The first stage is called charging flow limit stage, the second stage is called the high constant voltage stage, and the third stage is called low -constant voltage stage.During the second and third phase conversion, the panel indicator light is transformed accordingly. Most chargers are red light in the first and second stages of the charger, and the third stage becomes a green light.The mutual conversion of the second and third stages is determined by the charging current. It enters the first and second stages than a current, and less than a certain current enters the third stage.This current is called conversion current, also called turning current.
Electric vehicle charger purchase skills
Determine the battery voltage or output voltage to determine the output voltage of the electric vehicle battery V or the original charger.There are two methods. One is to see the original chargers judgment voltage: the general battery voltage is 48V, and the corresponding original charger output voltage is about 59V; the battery of 60V, the corresponding original output voltage is 73.5V.The second method is to see the battery judgment voltage: there are several battery composition in the general battery pack.The model is 6 -DZM -12/20, indicating that each battery is 12V.Therefore, there are several batteries in the electric vehicle, and 4 batteries are 48V.For the 8 -DZM -12/20 battery, each battery is 16V, and the four batteries are composed of 64V.
Determine the battery capacity or output current to determine the battery capacity of the electric vehicle battery AH, or the output current of the original charger.At first glance, the original charger judgment capacity: The output current of the original charger is 1.8A. The battery is 12AH.Secondly, the battery judgment voltage: The battery in the general battery box has a model. For example, 6 -DZM -12, 12 indicates that it is a 12AH battery, 6 -DZM -20, 20 indicates that the battery of 20AH.The third is to judge the mileage of running once: Generally speaking, the battery of about 1 year is full of 25-40 kilometers, and the 12AH charger is more appropriate.Run 45-60 kilometers, 20AH is more suitable.
Determine the positive and negative pole of the charger to determine the positive and negative electrode of the shape of the electric vehicle charger interface.The more universal interfaces in the market are T -type character heads, three vertical types, medium horizontal products, and round heads. Some character plugs may be positive and negative.You can use the multimeter to charge the battery charging interface to find the positive and negative poles. The output of the purchased charger is consistent with the charging socket. The negative electrode of the positive pole of the counterfeiter to the charger will damage the charger and the battery.
What is the harm of the charging time too long?
The charging of electric vehicles should mainly grasp the two principles: First, it is necessary to charge shallowly.The second is that you cant overdo it.If the charging time is too long, the water in the battery will be consumed too much. The vulcanization process of accelerating the plate will gradually decrease the battery due to the lack of water until the battery is drum and scrapped.

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