Charging pile quality appraisal

charging pile is a charging device specially designed for electric vehicles or other battery-powered devices. It usually consists of a power supply unit, a set of batteries and a set of charging sockets, which can convert electrical energy into current and store it in the battery for users to use at any time. The popularity and development of
charging piles is crucial to promoting the application and promotion of electric vehicles. By building an extensive charging network, we can solve the battery life anxiety of electric vehicle users, promote the development of clean energy transportation, reduce dependence on fossil fuels, and reduce environmental pollution.
In the case of charging pile quality appraisal, Zhongke Testing can develop charging pile quality appraisal services.

AC charging pile: a dedicated power supply device that provides AC power for electric vehicles with on-board chargers using conductive methods, including wall-mounted and floor-standing types.
DC charging pile: Fixedly installed on the ground, it is a special device that converts AC power from the grid into DC power and uses conductive electric vehicle power batteries. Involving charging pile performance, safety and other testing projects.

IEC 61851-23 DC electric vehicle charging station
GB/T 34658-2017 Communication protocol conformance test between electric vehicle off-board conductive charger and battery management system
GB/T 34657.1-2017 Electric vehicle conductive charging interoperability test specification Part 1 Power supply equipment
NB/T 33008.1-2018 Inspection and test specifications for electric vehicle charging equipment Part 1: Off-board chargers
NB/T 33008.2-2018 Inspection and test specifications for electric vehicle charging equipment Part 2: AC charging piles
NB/T 33002-2018 Technical conditions for electric vehicle AC charging piles

A deflagration accident occurred in an electric vehicle charging pile of a certain automobile company. In order to analyze the cause and responsibility of the accident, our company was entrusted to conduct quality appraisal of the charging pile equipment.
Appraisal analysis results:
The appraisal analysis expert group discussed the relevant information and on-site investigation of the charging pile involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
Quality analysis expert The team conducted discussions and comprehensive technical analysis on the relevant information and on-site investigation and inspection of the "charging pile" involved, and made the following quality analysis opinions:
The waterproof level of the column of the "charging pile" involved does not meet the standard requirements , water had entered the inside of the pillar door or water vapor had condensed into water, causing a short-circuit fault inside the leakage circuit breaker when the victim closed it. Moreover, because the power side and load side of the leakage circuit breaker were connected in reverse, the fault point could not be disconnected from the power supply in time, thus forming a short-circuit arc.