How can electric vehicle charging stations ensure safe charging?

2021-05-21 18:22:48  Resource

In general, when the charging power of a DC charging station reaches 29 kW, the output voltage of the ev charging station will exceed 400 volts. It is a very dangerous thing for the average consumer without professional electrical knowledge to operate such high voltage equipment. How can charging safety be guaranteed? The following answers will be provided from the perspective of the charging station investor and operator around three areas.


First, the charging pile itself safety system protection


       First, the choice of qualified charging pile products, do a good job of equipment safety performance acceptance work. At present, qualified charging pile products on the market to prevent users from pulling the gun and electrocution, the internal electronic lock is set to detect the charging status; charging pile shell, door lock, screen and cable fixing nuts and other easily accessible metal parts have good grounding measures; in general, the pile body has good waterproof, rust-proof, sealing measures and fault warning function. Although the charging pile has not been included in the 3C certification (known as China Compulsory Product Certification, is China to protect consumer safety and environmental safety, strengthen product quality management, in accordance with laws and regulations to implement a product conformity assessment system), but the current market mainstream pile enterprises are still in the spirit of life safety responsible attitude to actively pursue the safety factor climb, I believe that the market development can promote the various links It is believed that the market development can promote all aspects of the establishment of norms, the rapid growth of the charging pile industry will also be in line with the national "Thirteenth Five-Year Plan" to gradually establish a unified standard and norms.


Second, the charging pile daily operation and maintenance guarantee


      Even with high quality products and equipment, there is inevitably the possibility of ageing equipment lines, natural disasters and man-made damage, so the necessary measures to ensure charging safety are the daily operation and maintenance of charging piles. 24-hour care of the station and regular inspection of the equipment are important means of avoiding accidents. Particular attention should be paid to the stability of the anti-shock plastic wrapping on the charged metal head of the charging gun plug, which is usually the most likely equipment hazard to cause accidents. In addition, two standards approved by the State Administration of Market Supervision and Administration (State Standardisation Administration), "Requirements for Safety and Technical Precautionary Systems for Electric Vehicle Charging and Switching Facilities in Urban Public Facilities" and "Service Specifications for the Operation and Management of Electric Vehicle Charging and Switching Facilities in Urban Public Facilities", which will be officially implemented from 1 October 2019, set out generally applicable requirements for charging and switching service requirements and the operation and management of charging and switching facilities The standard requires electric vehicle charging facilities to establish a monitoring centre and a central control unit for safety prevention systems to prevent safety risks.


3. Guidance for safe operation of charging piles


       For those who need to operate the charging pile, it is important to provide guidance on the safe use of the charging pile, with "three looks and one listen" being the focus of publicity. When operating the charging pile, the driver should "see and hear" three things.


The first look is whether the charging post is in working condition. If it is not in working condition, ensure that the person in charge or the contact information of the person in charge of the matter is available within the station, so that the technical staff can be contacted in time for safety assessment and troubleshooting.


The second look, whether the charging gun is perfect and free of water, if water is found, do not carry out charging operations, press the emergency stop button if necessary to avoid electric shock, and contact the person in charge in time.


A third look, to see the status of the charging gun display, showing that the charging gun is in normal charging condition.


Listen to the sound of the charging gun locking when inserted into the vehicle's charging stand, indicating that the charging post is inserted normally. In addition, in addition to the charging operation to be guided, the public area should also have the corresponding warning signs, high-voltage distribution room and transformer room outside the door should hang "stop, high voltage danger" warning signs, indoor should be obvious "safety channel" signs.


The above three aspects are the experience gained in the process of charging pile operation and management, to protect the majority of new energy vehicle users and consumer life safety is what we should do, but also must do.


Luoyang Grasen Power Technology Co., Ltd is a professional AC home charger and DC fast charger EV supercharger manufacturer for 11 years in China, the charging connectors can be any two of CCS1/CCS2/CHAdeMO/GBT. Please enter our website for more information: https://www.grasen.com. Please send email to sales@grasen.com for inquiry.


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