Solutions for dead car batteries: 1. Live wire: When purchasing a car, a live wire is usually provided and placed in the trunk in case of emergency. If the vehicle is in a community or underground garage, you can ask the car owner. for help. Easy to get started with partners. 2. Car power bank: If you don't have a fire wire, you can prepare a car power bank. A car power bank is different from a cell phone power bank. The current of a car power bank is very high, 10000mA. , and there are special wires to connect the current coming from the car, so that it can help the electric current do the job. In addition, the price of a car power bank is not very expensive, and you can usually buy it for a few hundred yuan.
Detailed information:
The line of fire of a car is usually a few meters away
Yes, but it can only be used to fire a single battery.
The battery of a 24 volt truck is made up of two 12 volt batteries connected in series, in this way the nominal voltage reaches 24 volts, however, if the battery is not broken but only loses. power, then both batteries are exhausted at the same time, so using a 12 volt battery to start the fire will have little effect.
If one of the batteries malfunctions and the voltage is too low, a 12 volt battery can be used to turn on a single power battery to start the vehicle.
Detailed informationPrecautions for starting a fire in a vehicle:
1. The battery connection wire used should be thick wire. The current when starting the car is very important. the wire is too thin, it will cause the wire to overheat.
2. When building a fire, make sure the positive poless and negatives of the connection match. Do not connect the positive and negative poles backwards. cause damage to the electronic components of the vehicle, or even the disposal of the battery.
3. After starting the car, the power generated by the car's generator is not enough to fully charge the battery. The vehicle must be charged with a charger to avoid repeating this problem the next time it is started. .
After the car battery lost power, an emergency vehicle was found to connect the line and a fire broke out. Why couldn't the negative pole of the rescued vehicle be connected?
The car's live wire is usually about 3 meters long. It should not be too long, the resistance will expand and consume electricity. too short, it will not be easy to connect. When the car battery is exhausted, it will damagewill affect the vehicle's electrical power and distribution system, preventing the car from starting. If the engine stalls halfway and does not start, call an emergency vehicle or a tow truck. The price is relatively high, at present, other cars can be found to make emergency calls.
Use 16 square meters of copper wire to interconnect the battery levels of the two cars, then start the other car to idle its engine at high speed. Then learn how to start your car in an exploratory manner. If the battery is low, the car should start quickly. After starting and maintaining the starting state for 15-20 minutes, the generator set will finish charging the battery.
Once the car battery runs out, you should immediately use a battery charger to charge and activate it. If the battery charger cannot be used to charge, you must use the high-strength repair and improvement work of. The recovery tool. It can only be charged when the voltage reaches more than 10V. If the battery voltage is lower than 9V and battery charging and repairing cannot increase the working voltage, the battery needs to be replaced .
Daily attention must be paid to battery maintenance. If the car is to be left for a long time, the battery level wire should be removed to avoid loss of power consumption. 10 days without high-speed train. For long-term parking, the car should be started approximately every five days, keeping the engine idling and allowing the generator to charge the battery.
Why can't the negative pole of the rescued car be connected? This is about avoiding accidents. Most driverst encountered when the battery is low and requires emergency help. Many people can drive the car simply by connecting the positive pole to the positive pole and the negative pole to the negative pole of the two batteries. There is no problem. , but in fact, the correct operation is indeed yes, one end of the negative electrode is connected to the negative electrode of the emergency vehicle battery, and the other end is connected to the ground point of the vehicle body rescued, which is ground iron.
The negative terminal of the live wire cannot be directly connected to the negative terminal of the rescued vehicle battery, but must be connected to an exposed metal position on the vehicle body that is not painted. Why is this stipulated? Since the instantaneous current when starting the starter motor can be described as enormous, the contact area between the live wire and the battery cell head issmall, and the large instantaneous current can easily cause ignition and sparking, and flammable gas will rush into the battery. , which is prone to accidents. There is no other connector for the positive electrode of the battery, it can only be connected to the battery, and the negative pole of the car battery is connected to the car body, and the entire bodywork is negative. , so try to keep the connection point of the negative pole away from the battery to reduce the risk as much as possible.
Another point to add is that I read many answers and they all mentioned that directly connecting the negative pole is equivalent to providing starting current to the rescued vehicle and charging the battery at the same time , which causes too much current. Heavy. Personally, I think this is not the right answer, because the negative electrode of the battery and the car body are already knownected. The only difference. is the security issue mentioned above. Connect the negative pole of the rescued vehicle. Drive for a long time and use the car to generate electricity to recharge the battery.
Under normal circumstances, the emergency vehicle takes the line to start the car. There are two methods depending on the situation:
< p> 1: Be The battery of the emergency vehicle is only a little short of power, i.e. that she is in a situation where she cannot start the fire. At this time, the emergency vehicle wiring can be connected in any way. !
2: The battery of the rescued vehicle is seriously insufficient and the battery is very weak. The voltage is very low and the internal resistance is very high. Once the wiring is connected, this is equivalent to two car batteries connected in parallel. From the principles of physics we know thatEnergy will always flow from high voltage to low voltage. Then, at that time, some backup power. the vehicle will be powered by the battery. If discharging is performed at this time, the emergency vehicle's current may be insufficient. In addition, because the internal resistance of the recovered battery is too high, the instantaneous current at start-up is very large, which can damage the battery.
Correct wiring method:
1. Turn on the power of the whole vehicle and turn off the fan. air conditioning (if it is not turned off after the first turn off, it will be on by default)
2. Once the positive and negative poles of the emergency vehicle connected, disconnect the negative pole of the rescued vehicle and the positive pole of the rescued vehicle battery if necessary. Connect the positive pole of the emergency vehicle and the negative pole of the emergency vehicleat the ground point of the rescued vehicle. The reason why the negative electrode of the rescued vehicle must be removed is to prevent the rescue vehicle from charging the rescued vehicle's battery, which may result in insufficient battery.
3. The rescue vehicle increases the speed of the accelerator and the rescued vehicle begins to burst into flames. . .
4. Start-up time should not exceed 8 seconds. Wait 10 seconds before restarting.
5. Connect the negative pole of the rescued vehicle. Drive for a long time and use the car to generate electricity to recharge the battery.
Battery maintenance suggestions: It is recommended to remove the battery in time and use a special charger to charge it to avoid battery damage. exhausts for a long time and does not cause premature disposal. of the battery.
What you are probably talking aboutt is that the negative terminal of the rescue vehicle battery cannot be directly connected to the negative terminal of the rescued vehicle battery. This is about avoiding accidents.
The image above is taken from the user manual. The manufacturer specifically reminds: The negative live wire cannot be directly connected to the negative battery of the rescued vehicle, but must be connected to an exposed metal position on the body. it's not painted. Why is this stipulated like this? Since the instantaneous current when starting the starter can be described as huge, the contact area between the live wire and the battery cell head is small, and the large instantaneous current can easily cause ignition and sparking, and flammable gas will rush into the battery. , which is prone to accidents. There is no other connector for the positive electrode of the battery, it cannot be connectedthan to the battery, and the negative pole of the car battery is connected to the car body, and the entire body is negative. , so try to keep the connection point of the negative pole away from the battery to reduce the risk as much as possible.
But in real life, people directly connect the positive and negative poles to make fire, and there is no problem. For what ? This mainly involves legal liability issues. Batteries in some cases produce flammable gases through electrolysis, so manufacturers must take this issue into consideration. As long as they are reminded, the manufacturer will not be held responsible if something goes wrong. Therefore, there is always a lot of “alarmist” content in the instructions.
There is also a saying that the negative line of the rescued vehicle should be disconnected to prevent the rescue vehicle's battery from chargingr the battery of the rescued vehicle. In fact, this worry is unnecessary. The voltage difference is relatively small. when the load current is just connected.How big is it, and after connecting it, the engine starts and the generator has sufficient power supply. Random disassembly of the car's original power line may affect the operation of electronic equipment. Many car sunroofs need to be initialized before they can be used normally after a power outage. So there is no need to move lines for unnecessary reasons.
How to light a fire? The currently recognized correct approach is as follows:
1. First connect the positive terminal of the rescued vehicle battery.
2. Then connect the positive terminal of the emergency vehicle battery.
3. Connect the negative terminal of the batemergency vehicle equipment.
4. Connect the rescued vehicle to the rail.
5. Start the engine of the emergency vehicle and lightly press the accelerator to increase the output current of the generator.
6. The rescued vehicle begins to catch fire.
7. After successful ignition, remove the ground wires in reverse order: the ground wire of the rescued vehicle, the negative terminal of the rescue vehicle, the terminal positive from the emergency vehicle. vehicle and the positive terminal of the rescued vehicle.
Let me talk about my understanding of this problem, common sense and conventional electrical rescue methods.
There are approximately two types of battery discharge. One is that it is completely discharged and the other is that the battery is not enough to start. the car cannot start. But electrified rescue methods are different. You don'tyou may not be able to reach someone even if you electrify them. This is the subject of the Q&A, the question of why the negative pole of the rescued car cannot be connected.
Anyone who has studied basic physics knows that there are series and parallel connection methods for electricity. The results produced by the two connection methods are also different. The rated working voltage of electrical appliances in the car is 12V. , so what we do In electric rescue, the two batteries are connected in parallel, that is, the positive pole is connected to the pole positive and the negative pole is connected to the negative pole. There is also a wiring sequence, positive first, then negative. When closing the wire, the negative pole first, then the positive pole. Remember! This is a basic method of connecting electricity. If you are not sure, you can search for it onBaidu at any time. Don't log in randomly.
The car battery can store electricity. Part of the electricity generated by the generator is stored by the battery and used for starting, etc. when some generators do not produce electricity. . In other words, the battery is like a big water storage bucket. It can collect and store electricity and also discharge it. Suppose the rescue vehicle is A and the rescued vehicle is B. When the batteries of the rescued vehicle are completely exhausted and the batteries of A and B are completely combined, then part of the electricity from the vehicle's battery Rescue A will travel to If the battery of rescued vehicle B is stored, rescued vehicle B will still not be able to be powered and will catch fire. If we do not combine the batteries of vehicles A and B and disconnect the battery of emergency vehicle B,This is equivalent to using the battery of rescue vehicle A to directly start the rescued vehicle. So when we start when the motor is running, if the motor doesn't even have basic rotation, you need to disconnect the negative pole of the tram along the way when powering up and just connect it directly to the metal of the motor.
Another situation is that when the vehicle battery power is not very sufficient, the engine can run the engine, but it cannot reach the speed startup. This shows that the battery can still be discharged, but the discharge capacity is not sufficient. At this point, if we use the backup vehicle to connect the batteries, we can connect the batteries of both vehicles together when starting. will be discharged at the same time, which is enough to meet the power needed for starting.
It doesn't exist, but some carss do not have a reserved negative terminal on the battery. For example, an Audi car catches fire