Poor contact of new automobile charging port? It can be detected by electric spark

For new energy vehicles, charging is a very important link. The use experience, endurance and charging time of the car are closely related to the charging port. According to the new national standard, the charging port of new energy vehicles must meet the requirements of the new national standard. According to the charging port standard, the new national standard is divided into fast charging and slow charging.

There are 9 holes in the quick charging plug socket of the electric vehicle quick charging interface connector. According to the new national standard DC charging, the second 7 holes are slow charging, also known as AC charging, which is charged through the AC charging pile and the electric vehicle on-board charger. In addition, according to the vehicle Charger Relevant regulations and technical requirements are also made for the charger of the charger.

yes Charger The charging port of the vehicle needs a unified communication protocol to promote the interconnection of vehicle piles. At the same time, it also makes corresponding provisions on the model and size of the charger, as well as the current and other safety requirements of the vehicle charger. According to the new national standard, when the AC charging current is greater than 16a, the power supply terminal and vehicle interface shall have locking function, which shall meet the relevant requirements of GB / t20234.1-2015.

The power supply and vehicle socket are equipped with electronic locking devices to prevent accidental disconnection of the power supply during charging. The charging of electric equipment or electric vehicles shall be stopped or not started without reliable locking device. The new energy vehicles on the current market are basically unified charging ports. If there is no unified standard, isn't there a pile of charging plugs in the trunk?

Charger Poor contact generally refers to the failure of household appliances. It usually includes wire to wire contact, wire to electrical equipment contact, plug to socket contact, and wire to switch contact.

Among the causes of poor contact and fire, the fire caused by excessive contact resistance of line connector is the first. At the electrical wire connection, if the contact point is loose, the voltage between the contact points is enough to break through the air gap to form an arc, burst out sparks, ignite nearby combustibles and form a fire. The wiring mode of electrical equipment is improper, the connection is not firm, or the maintenance is poor, or poor conductive oxide film is generated at the joint during long-term operation, or the oxidation of the joint due to vibration, high temperature and other factors leads to excessive contact resistance at the joint.

EDM detection is mainly used to detect whether the thick non-conductive substrate of metal substrate has pinholes, sand holes and other defects. The detection is simple. One end is grounded and the other probe (mostly carbon brush type, ring spring type and rubber type) sends DC high voltage through the high-voltage probe. When the probe passes through the defective coating surface, it will give an automatic audible and visual alarm.

If the insulating anti-corrosion layer on the metal surface is too thin, the resistance and air gap density of metal leakage and leakage micropores are very small. When high voltage passes through, air gap breakdown will be formed, spark discharge will be generated, the alarm circuit will generate pulse signal, and the alarm will send audible and visual alarm. The purpose of anti-corrosion layer leakage detection is achieved according to this principle.