Industry knowledge – Automotive charging stations

Charging stations, similar in function to gas dispensers in gas stations, can be fixed on the ground or walls, installed in public buildings and residential parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels.

Generally, the charging pile provides two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile to print the corresponding charging method, charging time, cost data and other operations. The charging pile display screen can display the charging amount, cost, charging time and other data.

In the context of low-carbon development, new energy has become the main direction of global development. With the dual harvest of new energy vehicle production and sales, the demand for charging stations continues to grow. At the same time, there is still a lot of room for the increase in sales and ownership of new energy vehicles, and the accompanying charging pile concept sector will enter a rapid development stage, with huge potential. Companies within the charging pile concept sector have good future development prospects and are worth looking forward to.

It should be noted that the difficulty of charging is not limited to the number and distribution of charging infrastructure, but also to how to effectively improve charging efficiency. According to senior electrification engineer in the automotive industry.

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Introduction: "Currently, the charging power of DC fast charging piles for domestic electric passenger vehicles is about 60kW, and the actual charging time is 10% -80%, which is 40 minutes at room temperature. It is generally more than 1 hour when the temperature is relatively low.

With the large-scale application of electric vehicles, users' demand for temporary, emergency, and long-distance charging is increasing. The problem of difficult and slow charging for users has not been fundamentally solved. In this situation, high-power DC fast charging technology and products play a crucial supporting role. In the opinion of experts, high-power DC charging piles are a rigid demand that can significantly shorten charging time, Increase the frequency of using charging stations.

At present, in order to shorten the charging time, the industry has begun to research and layout high-power DC charging technology that upgrades the charging voltage of passenger cars from 500V to 800V, and supports single gun charging power from 60kW to 350kW and above. This also means that the fully charged time of a pure electric passenger car can be reduced from about 1 hour to 10-15 minutes, further approaching the refueling experience of a gasoline powered vehicle.

From a technical perspective, a 120kW high-power DC charging station requires 8 parallel connections if a 15kW charging module is used, but only 4 parallel connections if a 30kW charging module is used. The fewer modules in parallel, the more stable and reliable the current sharing and control between modules. The higher the integration of the charging station system, the more cost-effective it is. Currently, multiple companies are conducting research and development in this area.

Post time: Apr-07-2023