How Do You Know The Car Battery Do You Know It Is A Must See Item In Winter

- Nov 08, 2018 -

How do you know the car battery? Do you know? It is a must-see item in winter! !


Yesterday, it was winter, and it officially entered the winter, especially in the north, and the temperature will gradually decrease. So, in the cold winter, how to maintain the car battery and avoid anchoring? Share some knowledge about battery maintenance today.

Type of battery

The battery used in a general car is a lead-acid battery. There are two types of common lead-acid batteries, one is a water-added lead-acid battery, and the other is a maintenance-free lead-acid battery.

Water-added lead-acid battery: The plate of an ordinary battery is composed of an oxide of lead and lead, and the electrolyte is an aqueous solution of sulfuric acid. The advantage is that the voltage is stable and the price is cheap; the disadvantage is that the energy stored per kilogram of battery is low, the service life is short, and the daily maintenance is frequent.

Maintenance-free lead-acid battery: Maintenance-free battery due to its structural advantages, the consumption of electrolyte is very small, and it is basically unnecessary to supplement distilled water during the service life. It also has the characteristics of shock resistance, high temperature resistance, small size and small self-discharge. The service life is generally twice that of a normal battery.

There are also two types of maintenance-free batteries on the market: the first one does not require maintenance after the one-time application of the electrolyte at the time of purchase; the other is that the battery itself has been charged with the electrolyte and sealed off, the user simply cannot Add supplemental solution.

How to maintain the car battery in winter?

After more than two years of use of the battery for the car, the capacity and discharge capacity will decrease, and the life of the general vehicle battery will not exceed 4 years. Of course, a well-maintained battery will last longer.

Water-added lead-acid battery: focus on battery liquid level and battery liquid density

As the owner, we should check the battery level regularly. When the battery fluid is insufficient, add distilled water to the appropriate level. After adding distilled water to the battery, we should check the battery liquid density and keep the battery liquid density within a reasonable range.

Maintenance-free lead-acid battery: check the magic eye regularly and keep the battery fully charged

Since the maintenance-free battery does not have a water hole and a battery liquid level scale, we need to judge the state of the battery through the "magic eye" on the battery. The magic eye is green, indicating that the battery is normal, charging is sufficient; the magic eye is black to indicate that it needs to be charged; the magic eye is white to indicate that the battery needs to be replaced.

Discharge capability requires the use of a dedicated battery tester

We generally use a voltmeter to check the battery voltage. Although we can detect the voltage value of the battery, we can't check the battery's load capacity. In order to check the actual condition of the battery, we should use a dedicated battery tester to check the battery's discharge capacity and load capacity.

Weak current cannot be ignored

After the car is locked, the vehicle anti-theft system starts to work, and it will get a weak current from the battery, so if the car is not used for a long time, the battery will be short of electricity. If the vehicle is found to be stationary for a short period of time, in addition to checking the battery condition, it is also necessary to check whether the weak current when the vehicle is stationary is too large.

If the vehicle is stationary, the weak current is too large. It is probably caused by the grounding of the electrical circuit in the car. If it is not handled early, it will cause safety hazards. At the same time, the battery will be shortened by prolonged discharge. The automotive maintenance industry generally uses a clamp-on ammeter to detect weak currents when the vehicle is stationary.

Will the battery freeze?

The battery will freeze under the following conditions:

1. Adding too much distilled water leads to a decrease in the density of the battery liquid. At this time, the percentage of water in the battery liquid rises, causing the freezing point of the battery liquid to rise.

2. Excessive discharge leads to a decrease in electrolyte density, and an imbalance in the ratio of sulfuric acid to water causes the battery liquid to freeze.

What should I do if the battery freezes?

Since the battery liquid in the battery is water and sulfuric acid, the battery is likely to freeze at low temperatures. After the battery freezes, our vehicle will not start.

We should remove the battery from the car, then move it to a heated place inside the room to allow the battery to melt before loading it into the car.

Of course, in the evening, the battery is removed and taken to a warm place in the house to avoid the occurrence of battery icing.

How to avoid excessive battery discharge?

1. Avoid using high-power appliances when parking is waiting

High-power appliances include headlights, fog lights, seat heating, audio and air conditioning.

2. Check the headlights before the parking and whether the car roof lights are off.

In general, a normal fully charged battery can operate the headlights for two hours. As the rated capacity of the battery decreases, the time during which the headlights can operate normally is shorter. If you forget to turn off the headlights after parking, the vehicle's computer will not automatically turn off the lights, and the chances of not being able to drive the next morning will be 99%.

3, the vehicle should be pulled down for a long time without the vehicle

Due to the weak current consumption in the vehicle circuit system during parking, standing the vehicle for a long time will cause the battery to run out. Therefore, for vehicles that are not used for a long time, we should unplug the battery negative to avoid excessive battery consumption.

Battery use and maintenance precautions

1. The battery will not be used for a long time, it will slowly discharge itself until it is scrapped.

The secondary car should be activated every other time to charge the battery. Another way is to pull out the two electrodes on the battery. It is important to remove the positive and negative electrode wires from the electrode column. First remove the negative wire or remove the connection between the negative electrode and the chassis of the car. Then remove the other end with the positive mark (10).

2. The storage capacity of the battery can be reflected on the instrument panel.

When the ammeter pointer indicates that the storage capacity is insufficient, it should be charged in time. Sometimes the power is not enough on the road, and the engine can't start. As a temporary measure, you can ask other vehicles for help. Use the battery on other vehicles to start, connect the negative and negative poles of the two batteries, and connect the positive pole to the positive pole.

3, the density of the electrolyte needs to pay attention to

The density of the electrolyte should be adjusted according to the standard according to different regions and seasons.

4. When adding electrolyte, add distilled water or special rehydration solution.

In the case of deficient electrolyte, it should be supplemented with distilled water or special rehydration solution. Do not use pure drinking water. The pure water contains trace elements, which will cause adverse effects on the battery.

5. Uninterrupted use of the startup opportunity causes the battery to be damaged due to excessive discharge

The correct method of use is to take no more than 5 seconds for each time the car is started, and the interval between starts again is not less than 15 seconds.

6. Always check the small holes on the battery cover for ventilation when driving daily.


If the small hole of the battery cover is blocked, the generated hydrogen and oxygen will not be discharged, and when the electrolyte expands, the battery case will be broken and the battery life will be affected.

7, check the battery

Check the positive and negative electrodes of the battery for signs of oxidation. You can use hot water to pour the wire connection of the battery. Check the parts of the circuit for signs of aging or short circuit.

The above is about the maintenance of winter car battery and car battery maintenance knowledge. In most parts of China, the battery generally does not produce icing, and the battery is a consumable, if the performance and power have dropped significantly, Cha Shu suggested that the owner should replace it as soon as possible to avoid potential safety hazards.