Which pole is the first to remove the car battery? Is it dangerous to disassemble the car battery?

"Remove the negative and then positive" is the basic rule for disassembling a car battery. No matter what reason you dismantle the battery, you must abide by these rules when disassembling or installing or disassembling. Otherwise, it may be dangerous to violate the order.

Remove the negative first and then remove the positive

Why remove the negative pole first when removing the car battery? Because if the positive electrode is removed first, if the positive electrode is in contact with the metal of the body, it will be connected to the positive and negative poles, which will cause a short circuit of the wires and cause great damage to the battery and circuit lines.

Therefore, the danger of disassembling and installing the battery comes from here. Whether disassembling or installing, avoid contact between the positive terminal and the body metal. Since removing the battery can be avoided by removing the negative electrode first, how to avoid installing the battery? It's very simple. Install the positive electrode first, and then the negative electrode.

Disassembly and assembly of car batteries is risky

If the positive terminal contacts the body metal, that is, the positive terminal and the negative terminal are directly connected to form a loop, and the electrode may melt, or even catch fire. Since we need to use metal tools for disassembly and assembly, it will also be conductive and may also be dangerous.

Possible effects after the car battery is removed

After the battery is removed, the system time may be reset to zero, the anti-theft system may be locked, etc., so to avoid this situation, we can use a spare battery to connect to the positive and negative poles of the car, and then remove the old battery and replace the new After the installation of the battery is completed, remove the spare battery to avoid uninterrupted power on the vehicle system.