New energy industry is currently the focus of global development, charging pile is one of the infrastructure of new energy vehicles, charging pile to be exported to the United States, you must do UL or ETL certification, the key devices inside must have UL certification, including charging pile inside the most critical device is the charging module, then how to do UL certification of this module.
Charging module type:
at present, charging modules are divided into two categories, one is an AC to DC module, and the other is a DC to DC module. Both modules have unidirectional or bidirectional functions.
For the two-way charging module, because of the grid connection function, in addition to the certification according to the standard UL 2202, the UL 9741 and the corresponding functional safety assessment should be additionally considered.
the cooling mode of the charging module is divided into air cooling, liquid cooling and natural cooling.
When the charging module is UL certified according to UL 2202, corresponding liquid-cooled and air-cooled auxiliary heat dissipation devices shall be provided for testing for liquid-cooled and air-cooled modes.
at present, the common design power of the charging module is 30KW, 40KW, 60KW.
the common industrial voltage in the United States is as high as 480V, so when the charging module is UL certified in North America, the highest input voltage is 480V. It is recommended to use this highest voltage to design the heat dissipation capacity of the product.
UL 2202, note: This standard is only for the charging module inside the charging pile. If the charging module is used in the energy storage field or in the car, the corresponding UL standard may change.
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