What is the reason for disassembling the battery on the car, and why do you need to remove the negat

If you directly dismantle the positive electrode, because the wrench is made of iron, the wrench is easy to touch the car body, so it will take the iron short circuit, so there will be no such situation when you directly remove the negative electrode, the positive electrode of the car battery is connected with the main switch of the automobile circuit and the electrical switch, and the negative electrode is connected to the car body (that is, the iron), so the conductive objects connected to the car body are all negative electrodes, and once they come into contact with the positive electrode, they will produce a short circuit and sparks, which is very dangerous.

Because the whole car frame is a negative pole, you will inevitably collide with the large frame when you remove the positive pole first, which will cause a short circuit....Burn out the electrical.

The negative is to take the iron wire to prevent short circuits.

In a circuit, the current does not flow through the electrical appliance, but is directly connected to the two poles of the power supply, and the power supply is short-circuited (short circuit). According to Ohm's law i=u r, we know that since the resistance of the wire is small, the current on the circuit will be very large when the power supply is short-circuited. Such a large current, the battery or other power sources cannot withstand it, which will cause damage to the power supply; What's more, because the current is too high, the temperature of the wire will rise, and in severe cases, it may cause a fire.

In fact, it is just a habit to dismantle the negative electrode first, and the positive electrode and the negative electrode are the same. If you dismantle it all, it's okay to dismantle it first.

Dismantle the negative pole first to prevent accidental iron striking when removing the negative electrode!

The negative is to take the iron wire to prevent short circuits.

To remove the negative pole of the car battery, you need to open the hood of the car first, find the battery, the black side is the negative pole of the battery, and you can directly screw off the negative electrode, the specific operation steps are as follows:

1. Open the driver's door of the car.

2. Pull the hood switch on the left side of the driver's leg of the car.

3. Lift up the hood of the car's engine.

4. Use the support rod to support the engine hood of the car, and ensure that the support is firm to avoid danger during operation.

5. Find the battery, the black side is the negative pole of the battery, and you can directly screw the negative pole off. (Done).

Hello, disassembling the negative pole of the battery refers to the power off, the battery's No. - pile loosened and disconnected within the specified time and then installed and tightened, I hope it can help you, car problems, ask the car master, if you are not sure, please log in to the car master to find me!

When jumping to start other vehicles or using other vehicles to jump to start the vehicle, you need to disconnect the ignition switch before installing and removing the jumper cable. Before using arc welding on the body, the battery cable should be removed with the ignition switch turned off. After removing the battery for charging or replacing the battery, it should be noted that the positive and negative polarity can not be connected wrongly during installation, the battery pole and the wire clamp should be firmly connected, and the iron should be reliable, otherwise it is easy to burn the line in the ECU.

Go to the repair shop, don't disassemble it yourself, the computer will report the fault code.

Car battery charging does not need to remove the negative electrode, you can turn off the car and charge it directly on the car.

When the car battery is powered off or not used for a long time, the negative electrode needs to be removed. The negative terminal post of the car is connected with the body, and the entire car body leads to the negative pole, which can also be understood as the body is the negative pole. In this way, the negative pole of any electrical component can be connected to the body with iron, and there is no need to pull a wire to the negative terminal post for each component.

If the positive pole of the battery is removed, because the wrench is metallic and conductive, if the metal part of the body is accidentally touched during the disassembly, it is equivalent to the positive pole of the battery directly connected to the negative electrode, resulting in a short circuit of the battery.

Abstract: Hello friend, you can use the negative electrode of the car battery casually, and you can only disassemble it after the engine is dormant. Wait for the engine to sleep before dismantling the negative pole head.

Can the negative pole of the car battery be removed casually?

Hello, I'm helping you sort out the answer to your question, please wait a while Hello friend, you can do whatever it takes to have the negative electrode of the car battery, and you can disassemble it only after the engine is dormant. Wait for the engine to sleep before dismantling the negative pole head.

The car emergency brake fault light is on, can you disassemble the battery line and cut off the power to solve this, you can detect the fault through this computer, repair it according to the fault, or use the computer to eliminate the fault. If the negative pole of the battery is turned off, it may lead to the loss of this data, which is a problem. Personally, I would recommend this.

Use a computer to eliminate the glitch**.

Oh! Okay thank you.

Okay, you're welcome, friend.

Thank you, friend!

In today's era of industrialization, the industrial production of every country in the world has been greatly improved, and the industrial production of every country in the world has been greatly improved in today's era of industrialization. In fact, in addition to the need to use the engine to provide slow running power, the car also needs another core part to provide electricity for the car, which is the battery in the front cover of the car.

The function of the battery is that there is a battery in the car battery, and the battery can provide a strong power current to the car when the car starts. At the same time, when the car engine is overloaded, the battery in the car battery can provide electricity demand for the car and power the car. The battery of the car is not able to be used for a long time, and the car battery also needs to be replaced regularly, otherwise it will have a certain impact on the driving of the car and endanger life and property.

And when you don't start your car or use the battery for a long time, it may cause some damage to the car battery. At this time, we need to replace the car battery in time, so when we replace the car battery independently, should we first unload the positive or negative electrode of the battery?

The order of disassembly is the following, let's take a look at this problem. The disassembly of the positive and negative poles of the battery is not arbitrary, and he also pays attention to a certain order. If it is dismantled and demolished at will, the behavior is incorrect, which is likely to cause some damage to the internal parts of the car, and may also endanger the safety of some people.

If we remove the positive electrode of the battery first, because the negative electrode is connected to the entire car body, we all know that most of the car body and internal parts are made of metal, and one of the characteristics of metal is that it can conduct electricity.

Precautions and the disassembly tools we use are generally made of hard metal, so it is very likely to cause a short circuit in the car when we disassemble the positive electrode. During the short circuit, a large amount of current will pass through the inside of the car, and the voltage at both ends is also very high, which will cause serious damage to the car. If we disassemble the negative electrode first, the car will be instantly broken and unable to form a circuit, which will not cause damage to the car.

When removing the battery cable, the negative electrode should be removed first, and then the positive electrode. This is the safest order and does not cause danger.

Unload the positive electrode first, this practice is very correct. It is also a very correct procedure and operation. So be sure to remember.

The negative electrode should be removed first and then the positive electrode. It's the same when it's installed.

When the positive electrode is removed with an instrument without removing the negative electrode, it is easy to come into contact with other parts of the body, resulting in a short circuit.

The correct procedure to remove the battery should be:

1Close the key door and remove the key;

2. Remove the negative cable of the battery;

3。Remove the positive protective cap of the battery;

4。Remove the battery positive wiring;

5。Remove the battery connection device;

6。Remove the battery;

7。Reverse the installation order.

Note: During installation, install the positive wiring first, and then the negative wiring.

When we replace the car battery, the old driver often says that when you remove the battery cable, you must first remove the negative electrode and then the positive electrode. On the contrary, during the installation process, we should install the positive electrode first and then the negative electrode. There are also such provisions when connecting energy to other vehicles that have energy loss.

So why? When disassembling the battery, it must be disassembled first, and then the negative connecting cable must be installed, if the positive wire of the battery is removed first, if the metal key is in contact with the body during the disassembly, it will cause a short circuit; The same applies during installation. If the negative pole is installed, and the positive pole is installed, the battery will also be short-circuited if the metal key inadvertently touches the body when the positive cable is activated.

The same is true when connecting power to a vehicle that lacks power. The positive pole must be connected first, and then the negative pole.

If the vehicle cannot be parked for a long time, the negative wire of the battery must be disconnected to reduce power loss. Because when the car is turned off, the car's anti-theft system and some electrical appliances on the car are still working, and the energy is still slowly consumed and consumed.

If this results in a serious loss of battery power, the consequence is that it cannot be started properly, especially for diesel vehicles with high energy consumption during take-off; Failure to do so will cause irreversible damage to the battery and shorten its service life. Therefore, as a car owner, you should understand that disconnecting the battery power supply is a common operation, and you had better master it yourself.

In order to build the iron, once it is dismantled, we will not have a problem tossing casually: but if the positive electrode is removed first, there is no problem in theory, but there will be a problem, improper operation will cause the wrench to contact the metal parts on the body, and there will be sparks on the surface, which is actually equivalent to the positive and negative electrodes connected, and the instantaneous current is quite large. In serious cases, it will directly blow out the largest power fuse on the car body, and the most common is to burn the car navigation system.

If the car is not driven for a long time, the battery will slowly lose power, and the power will be consumed slowly. Finally, let the family charge the car battery regularly, start the car every 1-2 weeks, and run it for 5-10 minutes. Generally speaking, car batteries are DC, most of them use 12-volt batteries, and large vehicles use 2 12-volt batteries.

Using the negative pole, the negative pole of all electrical equipment can be connected to any part of the car body, and the positive pole is connected with the main switch of the car power supply.

In this case, if the positive pole of the battery is removed first, if the metal wrench is in contact with the body during the disassembly process, it will cause a short circuit in the battery; The same is true during installation, if the negative electrode has been installed, and then the positive electrode is installed, if the metal trigger closes the electric door when tightening the positive electrode connecting wire, remove the negative electrode first, and then remove the positive electrode; When installing, install the positive electrode first, and then install the negative electrode. When the battery is out of power, it is connected to the positive electrode first, and then to the negative electrode; After starting, first loosen the negative electrode, and then loosen the positive electrode.

Long-term parking of the vehicle, do not drive friends do not need to disconnect the positive and negative poles, the negative electrode can be de-energized, when the manufacturer produces the vehicle out of the factory, it is generally disconnected from the abdominal muscles, because in the transportation or sales process, the vehicle may exist in the middle of 3 6 months because the car body itself is the negative electrode, is electrified, so first remove the negative electrode, disconnect the connection between the body and the battery, pay attention to the best to wrap the negative electrode head with insulation.

For the car that is not driven for a long time, from the perspective of protecting the battery, the battery is fully charged first, and then the negative pole of the battery can be disassembled, but at most every 3 to 6 months to fully charge the battery and break the battery line will also be electrified, but it is slow, this method is only suitable for half a year, if it exceeds or often make up the battery. Remove the negative electrode first and then remove the positive electrode, no need to take off the battery wire, ten days and eight days to hot the car road, long-term car damage quickly pay attention to the wire head to deal with the power carefully.

The battery is the first thing that is damaged by the little or long-term storage of the vehicle, because even if the car is not opened, there are many electronic components that are constantly using electricity, such as anti-theft systems. After a long time, the battery power decreases and the voltage drops, resulting in the inability to start. If the battery has no power at all, it will greatly shorten the battery life.

Therefore, if the car is to be placed for a long time, it is necessary to disconnect the battery cord and prevent it from continuing to supply power to prolong the service life of the battery. What's more important is that the next time you start the car, it will be able to ignite and not delay time.

So to dismantle the battery wire, you must remove the negative electrode, but not the positive electrode, of course, you don't need to remove both the positive and negative electrodes. Because as long as one end is disconnected, the circuit cannot form a loop, and the electricity will not continue to be used. If you want to disconnect both the positive and negative electrodes, or replace the battery, then you must remove the negative electrode first, then remove the positive electrode, and install the positive electrode first, and then install the negative electrode.

Why is that? Because the negative terminal post of the car is connected to the body, the body is metal, and the entire car body leads to the negative pole, and it can also be understood that the limb bend is the negative pole of the body. In this way, the negative pole of any electrical component can be connected to the body with iron, and the current will be transmitted back to the negative pole through the body, and there is no need for each component to pull a wire to the negative pole binding post, which greatly saves the amount of wire and reduces the difficulty of circuit fault maintenance.

If the positive pole of the battery is removed, because the wrench is metallic and conductive, if the metal part of the body of the troublemaker is accidentally touched during the disassembly, it is equivalent to the positive pole of the battery directly connected to the negative electrode, resulting in a short circuit of the battery. So the danger is in the disassembly process, when it is removed, whether it is a positive electrode or a negative electrode, the effect is the same.