The company's products are intelligently matched with electric equipment such as household electric vehicles, electric cars, and electric buses, and are widely used in living quarters, underground garages, bus stations, expressway service areas, shopping malls and entertainment venues. The product is easy to use. According to the installation method, it can be divided into: floor-mounted charging pile and wall-mounted charging pile to adapt to different places; according to the charging method can be divided into: DC charging pile, AC charging pile, AC charging pile, used for charging equipment of different specifications. The product has the characteristics of convenient use, fast charging, green and environmental protection. In recent years, vigorously fostering and promoting new energy products, electric vehicles have become a development trend on behalf of walking, and the number of electric vehicles has increased. As a "gas station" for electric vehicles, the construction of charging piles will be fully developed.
The problem of battery damage to the electric vehicle charging station in the community. The charging of the electric vehicle charging station usually completes two fundamental tasks. The first is to restore the battery to the rated capacity as quickly as possible, and the other is to use low current charging, which is supplemented by the electric vehicle charging station. The energy lost by the battery due to self-discharge to maintain the battery's rated capacity.
During the charging process of the electric vehicle charging station, the lead sulfate on the negative plate of the lead-acid battery gradually precipitates lead, and the lead sulfate on the positive plate gradually generates lead dioxide. When the lead sulfate on the positive and negative plates completely produces lead and lead dioxide, the battery begins to have an overcharge response, generating hydrogen and oxygen (this is the battery gassing). In this way, in a non-sealed battery, the water in the electrolyte will gradually decrease. In sealed lead-acid batteries, hydrogen and oxygen can be recombined into water when a medium charging rate is used. The overcharge start time (safety voltage inside the battery) is related to the charging rate. When the charging rate is greater than C/5, before the battery capacity recovers to 80% of the rated capacity, an overcharge response begins. As long as the charging rate is less than C/100, the battery will show an overcharge response after the capacity is restored. In order to restore the battery capacity, a certain overcharge response must be allowed.
In order to facilitate the management of electric vehicle charging by the property, electric vehicle owners have to charge them in a timely manner. Coin-operated electric vehicle charging stations have been developed, and they have rapidly developed and emerged. With coin-operated charging stations, there is no longer any need to pull wires privately, and the management of the property owner is much easier. When charging an electric vehicle, you only need to plug in the charger that comes with the electric vehicle to complete the charging, while the ordinary 220V power supply charges the electric vehicle, so that normal charging is not easy to damage the battery, and it also solves the worries of the car owner.
After the overcharge response of the electric vehicle charging station occurs, the voltage of the single cell battery rises rapidly. After reaching a certain value, the rising rate decreases, and then the battery voltage starts to slowly drop. It can be seen that after the battery is fully charged, the way to maintain the battery capacity is to apply a constant voltage at both ends of the battery pack. Under the float voltage, the charged current should be able to replenish the energy lost by the battery due to self-discharge. The float voltage cannot be too high to avoid shortening the battery life due to severe overcharging. Electric vehicle smart electric vehicle charging station adopts proper float charging voltage, and the life of sealed lead-acid battery can reach more than 10 years. Theory proves that when the actual float voltage is 5% different from the regular float voltage, the service life of the maintenance-free battery will be shortened by half. The voltage of a lead-acid battery has a negative temperature coefficient, and its cell value is -4mV/°C. An ordinary (no temperature compensation) charger that works ideally at an ambient temperature of 25°C. When the ambient temperature drops to 0°C, the battery cannot be fully charged. When the ambient temperature rises to 50°C, the battery will be seriously overwhelmed. Charge and shorten the life. Therefore, in order to ensure that the battery is just fully charged within a wide temperature range, the various conversion voltages of the charger of the electric vehicle charging station must vary with the temperature coefficient of the battery voltage.