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The first type is rarely used by drivers living in cities, as it is really difficult to have their own small yard in the city; The third type is most commonly used, with some vehicles using the second type. But now, the most struggling consumers facing new energy vehicles are often those who have the ability to charge on the go, which is the 3/4 market, or simply the rural township automobile market; So let's dispel our doubts first. If you have a yard or can throw the wires out of the door for charging, you need to prepare the wires for charging with the car

The maximum power for on-board charging can reach 3.3kw, and some third-party brands of on-board chargers can reach 7kw, which requires high selection of sockets

The standards for household wiring are roughly as follows:

Air conditioning line -6 square meters

Kitchen and bathroom line -4 square meters

Ordinary line -2.5 square meters

The "square" of wire is not the concept of m2, but (Pi × Wire radius), in square millimeters; A flat wire can theoretically support a unidirectional 3kw device, but this is only the limit standard. If the standard device is used for a long time, it can be said that the insulation layer is easily short circuited due to high-temperature melting. A copper wire of 1 square meter is suitable for use with equipment below 1.76 kW at most, and should not be used for a long time. Therefore, sockets for ordinary lighting and other equipment cannot be used with high-power devices, especially for car charging

However, the lowest common socket for household use should be 2.5 square meters, and the limit of 220V voltage can reach 3.6 kW, but it is also not suitable for long-term use. Because of the need to use high power equipment such as Induction cooking, microwave oven or Yuba in kitchen and bathroom, the standard of wire used is often higher. Some home furnishings will choose 6 square meters of wire, but most of them are only 4 square meters; This standard wire can only support high-power devices for a short period of time, and its maximum load is within 6kw. However, most household electrical wires are dark wires, and the heat dissipation effect of the wires inside the walls and floors is poor. The wires are prone to high temperatures; So a 4-level socket can support up to 3.3kw of on-board charging, while high-power on-board charging is not reliable enough. The actual use of equipment with a capacity of about 5kW for a long time on a 4-level wire caused the insulation layer to melt and short-circuit within a few days. 6 flat wires are almost the highest standard among household wires. In theory, 220V can support devices up to around 8kW, which allows for high-power charging with the car; Just pay attention to observing the temperature of the wire when using it. Generally, the cabinet air conditioning socket uses 6 square wires. Feel the temperature of the wire harness in the leakage protection at the entrance position, and there is no problem with the temperature feeling. If it is too hot to handle, it is not possible to use a car charging device close to 7kw, otherwise it may still burn the wire harness. However, the so-called 7kw on-board charging or self built piles are basically only around 6.5kw, and as long as it is a national standard wire material, there is sufficient redundancy. Conversely, non-standard wire materials are not good

In summary, the socket at home can indeed charge the car, but it is necessary to choose the right socket to avoid high-power equipment burning the wiring harness, and also to avoid the possibility of equipment damage; As for flying wire charging, it is not recommended. The safest way is to let the plug of the charging gun directly enter the internal socket, and it should not be connected to the vehicle using a common "plug", as the wiring standards used for the plug are also relatively low and cannot support high-power devices. To extend the distance, it is necessary to choose an industrial grade PDU, which means a high standard large plug-in board with a wiring harness of at least 6 square meters

If it is possible to use an open line, the entrance line is usually 10 square meters, which can support 220V-13kw. It is very safe for high-power on-board charging and self built piles; The so-called self built pile is a charger fixed to the wall, which is equivalent to connecting the plug and plug of the car charger together. The box of the charger is a box, with the main function of being beautiful and leaving a charging gun socket, which can be put in when not in use

Conclusion: The on-board charging is mainly used for users who do not have the ability to install a Charging station, or occasionally use it for long-distance travel. When using it, choose the right socket to avoid damaging the line or even causing a fire; The special new energy vehicle ammeter with Charging station is the best scheme, and it is also the most ideal charging scheme for rural and township new energy vehicle users at present

However, some brands of vehicles do not deliver Charging station with the vehicle, and the cost of purchasing Charging station by themselves is too high, so you can only apply for new energy meters and sockets to use with the vehicle charging

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