Applications

The working principle of the 7kW portable DC charging case is based on DC charging technology. It is powered directly through the vehicle's fast charging port (9-hole DC interface), without relying on the on-board charger (OBC), resulting in higher charging efficiency. The charging case is equipped with a high-power rectifier device, which can directly deliver electrical energy to the battery, avoiding the power limitation of the car charger and thus improving the charging speed.

The circuit structure of the 7kW portable DC charging case mainly includes single-phase active PFC, DC/DC converter, auxiliary power supply, and input/output detection and protection circuit. The single -phase active PFC circuit works in conjunction with the EMI input circuit to rectify, filter, and correct the power factor of the AC input to meet EMC standards and reduce the total harmonic content of the current. The downstream DC/DC converter uses PWM waves to control the DC voltage output by the upstream PFC. After passing through a high-frequency transformer and subsequent rectification filtering, it outputs a current and voltage suitable for battery charging.

With the popularization of 800V high-voltage platforms and V2G technology, the development trend of 7kW portable DC charging boxes includes:

Plug and play charging without scanning code: It is expected that in the future, low-power DC charging stations will support the "plug and play charging without scanning code" function, reducing charging time to within 30 minutes and approaching the refueling experience of fuel vehicles.

Diverse Scenarios: Low power DC charging piles are suitable for households, communities, hotels, shopping malls, and other scenarios, without the need for dedicated power distribution facilities. They have low installation costs and are suitable for flexible deployment.

Intelligent management: The mobile DC charging station has remote monitoring and fault diagnosis functions, supports unmanned driving or remote control operation, and has lower operation and maintenance costs.

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