Hidden Dangers Of Large-Scale EV Charging Stations
The charging terminals of the public charging station should adopt high-power charging,
reduce the number of terminals, and arrange multiple points.
The charging mode should adopt the fast charging and fast replenishing method,
and avoid the construction of large, especially super-large centralized charging stations.
Large-scale centralized construction of charging piles should be carefully considered, after all, there are only 1 and 0 safety issues.
Accidents at EV charging stations are not only a safety issue for consumers’ lives and property but also a social and public safety issue.
New energy vehicle charging pile safety hazards
At present, the owners of new energy vehicles with the highest charging frequency are some travel service practitioners and transportation personnel,
such as transportation vehicles such as online car-hailing application vehicles and cargo pullers, as well as some areas with a high frequency of shared vehicles.
The charging frequency of new energy-shared vehicles is quite high. Most of these new energy vehicles are entry-level new energy vehicles,
such as new energy-sharing vehicles, compact new energy cars in online car-hailing, and some new energy minivans for freight demand. These vehicles are used every day. It takes 1-2 quick charges to meet their work needs.
The ability to withstand long-term fast charging, for new energy vehicles, fast charging means that the power battery has to withstand higher currents,
especially in the case of high-frequency fast charging, the pressure on the power battery is particularly huge.
Here we have to focus on a key point – the charging performance of the EV charging.
I wonder if everyone will pay attention to the charging power of the charging pile when charging.
In fact, charging piles with different powers will have different charging capabilities, which is especially obvious for fast EV charging piles.
At present, most of the DC fast chargers are 30kW-180kW, and 200V-750V. After conversion, the output current is between 60A-250A,
which can basically guarantee the charging needs of most new energy vehicles. With the rapid development of new energy vehicles, the performance of the battery has been continuously upgraded.
The new energy vehicles with a cruising range of more than 200 kilometers have been promoted in 5~10 minutes, and the corresponding 480~600kw, 500A current, and 1000V super EV charging have also begun to be laid out.
Due to the high charging power and the short charging time, the small super charging station arranged in this way allows the electric vehicles to charge quickly and drive away quickly,
which not only increases the efficiency of the station yard, but reduces the construction cost of the station yard, and increases the operating income;
When time is concentrated, the range of risks arising from vehicle combustion is easier to control.
For the charging needs of existing new energy vehicles, super charging stations can also take into account.
The charging equipment adopts the method of group control and group charging, and the power can be flexibly allocated. It can provide services for fast charging and slow charging of various new energy vehicles…
In order to improve the efficiency of equipment use,
it is recommended that the vehicle be charged to 80% of the battery capacity, and the charging pile will stop providing services.
Related Development Suggestions
With the rapid development of new energy vehicles, the safety and social issues brought about by charging have become hot and difficult points in the automotive industry.
According to the market research data conducted by a well-known domestic consulting company,
the results show that most users will replenish their electricity when the electricity is about 20%, which is also in line with the actual vehicle usage scene.
The problem, the report shows that the best charging power is in the range of 30%~80%,
and the charging time is the longest in the range of 80%~100%, accounting for 50% of the whole charging time,
when the battery remaining is less than 20%. It takes the longest time to fully charge the battery,
and there is a high chance of spontaneous combustion when the battery is fully charged.
In a station where vehicles are too concentrated,
the spontaneous combustion of vehicles can easily cause major accidents.
In the new era of the coexistence and development of traditional vehicles and new energy vehicles,
the safety accidents caused by the charging of new energy vehicles at the station will further deepen consumers’ doubts about the safety of electric vehicles.
Therefore, for the charging safety of new energy vehicles,
the following suggestions can be considered: Adopt high-power terminals in the construction of the station,
small supercharging stations with few terminals and multi-point layout, and fast charging and fast replenishment for the charging mode. (Charge and recharge to 80% of battery capacity).
Due to the high charging power and the short charging time, the small super charging station arranged in this way allows the electric vehicles to charge quickly and drive away quickly,
which not only increases the efficiency of the station yard,
but reduces the construction cost of the station yard, and increases the operating income; time focus.
For the charging needs of existing new energy vehicles, this type of supercharging station can also take into account.
The charging equipment adopts the method of group control and group charging, and the power can be flexibly allocated.
It can be used for fast charging and slow charging of various new energy vehicles. Provide services.
In order to improve the efficiency of equipment use, it is recommended that the vehicle be charged to 80% of the battery capacity, and the EV charging will stop providing services.