Friends who know the food delivery industry know that the battery life of the rider's electric vehicle is often unable to meet the long-term delivery needs, and it is difficult to temporarily charge it. Therefore, the two-wheeled electric vehicle replacement station appeared in due course, replacing the previous charging link by changing the battery, and quickly solved the "endurance" problem.
Battery swap mode: faster and safer than charging mode
Different from the charging pile charging mode, the battery replacement mode can greatly save the energy recharging time of the car owner. When the electric vehicle battery is dead or insufficient, it can be replaced with a fully charged battery to replenish its electric energy. The process only takes a few minutes, avoiding the trouble caused by long-term charging, and to a certain extent solves the mileage anxiety of new energy vehicles. .
In terms of safety, battery replacement has certain advantages over charging. New energy vehicles often have overcharge and overdischarge during use, which will cause damage to the power battery and lead to attenuation of battery capacity. The replacement station will conduct centralized professional charge and discharge management of the battery, which is safer than the personal charging method.
In addition, the power swap mode can also effectively alleviate the grid load. With the further increase of new energy vehicles, a large number of new energy vehicles charging at the same time will pose a huge threat to the urban power grid, and the power station can choose to supplement electric energy during the low load period of the power grid, effectively reducing the impact of centralized charging on the power grid. load.
There is a saying about changing the power supply of the power station: ultra-wide input voltage range
For power station manufacturers, it is necessary to charge a large number of batteries in a concentrated manner, and the voltage that the system bears is relatively high. The national standard GB/T20234.3 stipulates that the rated value of the DC charging port is 750V/1000V/1500V. Reliability, the core key lies in the design and material selection of equipment. As the core component of the equipment, the power supply is particularly important, and needs to be considered in terms of reliability, product performance, and delivery time to match the development needs of the industry.
The power supply system of the battery swapping station is input by three-phase power, which is boosted to 800+VDC through the Boost circuit (meeting the 800VDC battery platform). Considering the fluctuation of the rectified voltage of the boost circuit, the input range of the auxiliary power supply is required to reach 1500V. The market mostly uses three-phase guide rail solutions, but the scheme wiring is complicated and the reliability is low; and the outdoor power grid fluctuates greatly, resulting in large fluctuations in the rectified voltage of the three-phase power supply, and a power supply with a wider input voltage range is required for driving power.
For this WEHO solution, the 200-1500VDC ultra-wide input voltage range series products PV15-29B24R3 and PV40-29B15 are recommended for the power supply of the control board and the drive of IGBT and silicon carbide (isolation 3000VDC), which can meet the outdoor use environment.
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