Detailed steps and precautions for car replacement batteries

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Replacing the battery is a car repair shop and the things that often meet in the life of the owner. I used to ask how to replace the BMW battery. This article shared today will tell the battery: 1.

Disassemble the old battery (1) confirm the battery installation The parts, most models are installed in the engine cabin or luggage compartment, and there are individual models installed in the cockpit, and do their own body protection measures in the corresponding position. (2) Removing external protection devices such as battery shields, measuring the voltage between the pole cylinders with a multimeter, or view the battery status by viewing aperture, and explains these conditions to the customer. (3) If the vehicle has an anti-theft system (including the sound anti-theft), you can connect the external power supply, or a battery sufficient battery.

Note that the positive electrode is connected to the positive electrode, the positive electrode of the external power supply can be directly connected to the battery positive electrode terminal, but the negative electrode should not directly connect on the battery negative terminal, but should be connected to the body iron. (4) Close the ignition switch of the fault vehicle (some models should be placed in the ON block, for example, Volvo S80 produced before 2005, should be subject to the maintenance manual), first disconnect the battery's negative connection line, and then disconnect the positive electrode connection String. If the battery has a ventilator, you must first remove it first.

(5) Remove the fixed device of the battery, take out the battery. If the vehicle is connected to an external power supply, be careful not to contact the body wiring with the body contact, and can be isolated using cotton cloth. (6) If the old battery has a corrosion, it is necessary to clean the battery connection.

2, install a new battery (1) before installing a new battery, if the battery brand model is inconsistent, to compare the shape of the old and the outer dimensions and terminal positions of the new old battery, and carefully check the capacity and cold start current parameters of the battery. Especially in the winter, if the cold start current does not match, it may cause difficulties in starting. (2) If the condition allows, the battery detector should be used to test.

Some batteries are in a long time, although the voltage between the positive and negative poles is higher than 12V, but in fact, the capacity is not enough, that is, the so-called virtual power, this Battery should be charged. It should be noted that it is necessary to measure when the ambient temperature is above 0 ¡ã C, charging when higher than 5 ¡ã C. (3) Place the new battery to the installation position and fix it.

With regard to a battery with a ventilator, don't forget to remove the ventilation joint from the old battery, install it to the new battery. About lead-acid batteries, pay attention to not exceeding 30 in the inclination angle of the battery during installation. (4) When connecting the battery wiring, first connect the positive electrode, and then connect the negative electrode.

Protection of anti-rust protection agent or no acid fat on the battery terminal after installation. (5) Check that the external power supply can be removed after confirming the fastening reliability. Start the engine, check the generator generator, can measure the generator output, or measured on the battery terminals, such as having a dedicated diagnostic device, you can also read the voltage data in the data stream.

In addition, it is recommended to measure the measurement at the engine idle speed and 2000R / min. (6) Regarding the vehicle of replacing the battery due to the discharge failure, the sleep current should be checked. Its traditional method is to place the multimeter in the current gear, then in series into the battery negative line, lock all door locks, turn off the ignition switch and activate the anti-theft system, stand for a period of time until current is stable.

(7) Regarding a vehicle equipped with a power management system, a sensor is installed in the negative electrode line, such a vehicle can only use the device of the clamp current table for current testing. In general, the sleep current of the vehicle should be less than 50 mA (subject to the model repair manual, such as some of the BMW models only require less than 80mA). (8) After replacing the battery, the relevant fault code recorded in the diagnostic instrument clear system should also be used.

Regarding the vehicle, such as Mercedes-Benz, BMW and Audi, etc. (9) After confirming that the electrical system check is correct, install the battery protection device, remove the body protection facility, turn off the engine cabin or baggage cover, and return the vehicle to customer.

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