What are the consequences of reverse connection of the positive and negative poles of the car battery? How to repair the reverse connection of the positive and negative poles of the battery?

Car batteries are a type of storage battery that can convert chemical energy into electrical energy to provide power for car lighting, audio, etc. Batteries have positive and negative poles, and the same is true for car batteries. There are also rules for how to connect and disassemble the positive and negative poles. What if you accidentally connect them the wrong way? Let's take a look.

What are the consequences of connecting the positive and negative poles of a car battery in reverse?

The positive and negative poles on the battery are connected in reverse. Since the car is not started, the generator is not working and will not charge the battery, so it will not cause any harm to the battery, but it may damage the car or even burn parts.

Generally, control systems produced by manufacturers, such as ECU, are strictly tested according to EMC and other standards, and have anti-reverse connection requirements. The possibility of reverse connection error operation has been considered during the design. Therefore, even if you connect the positive and negative wires of the battery in reverse, it will not directly cause them to be damaged, but they will not work normally.

Some car electrical appliances added by the aftermarket, such as some navigation systems, music players, etc., are generally designed with anti-reverse connection protection in mind by larger brands. However, it is difficult to say for some small manufacturers, in order to save costs or due to design negligence. If there is no anti-reverse connection design, there will generally be electrolytic capacitors inside, which will explode directly.

Generally, if you plug it in the wrong way, the current may increase instantly. The fuse device on the car will play a protective role. In most cases, the fuse is burned. You can reverse the positive and negative wires of the battery and replace the fuse. Basically, there will be no problem. However, if there is smoke or a strange smell, of course something is burned. You must carefully find and solve the problem before you can power on.

Some cars rely on batteries to store some data. If the battery is powered off, you may need to ask the manufacturer's after-sales department to re-write the data. If you connect it the wrong way and start it directly, it is possible that the starting system may be burned.

How to fix the battery's reversed positive and negative poles

If the positive and negative poles of the car battery are connected incorrectly, the engine will not start, the computer control circuit will not work, and even various other components will be burned out. You must operate under absolutely correct conditions.

Operation method: Turn off all electrical equipment before replacing the battery. After replacing the new battery, gradually turn on the electrical equipment in each branch. Before turning on the branch switch, you can first turn on the starter motor to see if the rotation direction is normal. This operation can reduce equipment damage.

For reference only.

Will connecting the positive and negative poles of the battery burn out?

Normal positive and negative poles touching each other will not damage the battery until the wires or devices that cause the short circuit are burned, or the battery terminals are burned and melted. If the battery is cleaned up in time after being found and the cause of the short circuit is found and eliminated, the battery will generally not be damaged. However, if a high current short circuit line is used to short-circuit the battery, the battery will soon be damaged after a violent chemical reaction inside.