What is the issue if the car charging pile keeps tripping?

[PenelopeRose]

It might be a problem with the power battery or the vehicle's BMS communication. Here are the relevant details: 1. Power Battery: The power battery is the power source that provides energy for tools, mainly referring to the batteries that supply power to electric vehicles, electric trains, electric bicycles, and golf carts. It is primarily distinguished from the batteries used for starting car engines. It commonly uses valve-regulated sealed lead-acid batteries, open-ended tubular lead-acid batteries, and lithium iron phosphate batteries. 2. BMS Battery System: The BMS battery system, commonly known as a battery caretaker or battery manager, is mainly used for intelligent management and maintenance of individual battery cells, preventing overcharging and over-discharging of the battery, extending the battery's lifespan, and monitoring the battery's status.

[HazelFitz]

I also encountered this issue when installing a charging pile, and later found out that the capacity of the household electricity meter couldn't keep up. Nowadays, the charging power of new energy vehicles starts at 7 kW, which old house distribution boxes might not handle. First, check if the circuit breaker model in the dedicated charging pile circuit matches—preferably a C32 or D-grade circuit breaker. Also, monitor the wire temperature; copper wires below 6 square millimeters are prone to overheating and tripping. Some installers might lazily connect to the lighting circuit, which definitely can't handle 10 hours of continuous high-current operation. I later upgraded to 10 square millimeter wires with a 40A circuit breaker, and haven't had a trip in a year.

[KathrynFitz]

Don't panic when encountering a trip; it might be the leakage protection in the distribution box at work. Moisture inside the charging pile's wiring or damaged insulation can trigger leakage protection. I've personally measured the grounding resistance with a multimeter—values above 4 ohms can easily cause false trips. It's advisable to check for water stains on the gun head when charging in the rain, as aging seals on the charging socket can also allow moisture intrusion. Another scenario is when the charging gun has been plugged and unplugged over 500 times, leading to insufficient spring force in the copper contacts, which increases contact resistance and causes the leakage protection to trip due to overheating. In such cases, replacing the gun head resolves the issue.

[OAllie]

Last time I helped my neighbor troubleshoot a tripping issue, and found that voltage fluctuations were the culprit. Charging during peak electricity hours when the neighborhood transformer is under heavy load can cause voltage instability. When the voltage drops below 200V or exceeds 250V, the charging pile's protection device will automatically cut off the power. You can check the real-time voltage curve in the charging records via the mobile app. The solution is quite simple: avoid charging between 7 PM to 10 PM during peak electricity hours, or install a voltage stabilizer for the charging pile. Newer charging piles now come with wide voltage adaptation capabilities, while older models may require a firmware upgrade.

[McCamilla]

My charging pile tripped because the terminal connections were loose. High current passing through caused the terminals to heat up and oxidize, creating a vicious cycle. Here’s a troubleshooting method: After powering off, open the charging pile’s casing and use a flashlight to inspect the terminals—blackened or burnt marks indicate poor contact. Remember to scan the wire connections with a thermal imager; temperatures exceeding 60°C are dangerous. Many installers don’t tighten terminals to the specified torque during installation—using a torque wrench to tighten to 4Nm is safest. Extra caution is needed for copper-aluminum wire connections due to electrochemical corrosion; applying conductive paste can extend service life.

[OElliott]

Frequent tripping of charging piles may be caused by cooling system issues. I disassembled my home charging pile and found the cooling fan completely clogged with willow catkins. Poorly designed charging piles can see internal temperatures soar above 70°C during prolonged operation. Some units have bottom air intakes too close to the ground, where rainwater splashes combined with dust easily form mud deposits. It's recommended to clean air ducts quarterly using compressed air and install dust-proof mesh on the back of charging piles. Special attention should be paid to humidity control when installing in underground garages - component insulation performance decreases when humidity exceeds 85%.