The car can't start again? Decrypt the battery for those things! How to choose a battery? How to extend the life of the battery

The battery should be the most familiar stranger to the riders, because unless the car can't catch fire, no one really thinks about this part. The battery is usually installed in the engine compartment or the trunk. Its main function is to provide power for starting and daily use of the vehicle, and to charge itself after the engine is running. Since the battery is so big, how do you choose a battery? What is the maintenance of the battery? This issue of Mr. Qi came to talk about this issue.

How to choose a battery?

Regarding how to choose a battery, this question is actually the easiest to answer and the least difficult to answer. The reason why it is easy to answer is that it can be purchased according to the original battery model. There is no need to know anything else. If your car doesn't need to install too many electronic devices, then the next article can be skipped and directly look at the mistakes and maintenance. If your car is equipped with parking monitoring, high-powered audio and other equipment, then you really need to study it carefully.

First talk about the parameters of the battery, there are three main parameters related to our daily use of the car, the first is the capacity, the unit is Ah (Ah), the higher the value, the greater the capacity of the battery. The second is the voltage, the unit is V (volts), usually the cold car voltage of the family car is 12V. The third is current, the unit is A (A), which is mainly related to the starting performance. Some batteries will directly indicate the cold start current CCA value, such as 470CCA, which means that the battery has a cold start current of about -18 °C. 470A. If your car adds different types of electrical equipment, then increase the capacity and starting current.

Let's talk about the classification of batteries. The batteries commonly used in family cars are mainly divided into three types: ordinary batteries, dry batteries and maintenance-free batteries. Among them, ordinary batteries and dry batteries are collectively referred to as non-maintenance batteries, so in summary, the batteries are divided into maintenance-free and non-maintenance-free. The distinction is also very simple. There is a distilled water filling hole on the upper surface of the battery, which is a non-maintenance battery. Mr. Qi suggested to choose a maintenance-free battery as much as possible, because the price difference between the two is not large, and the maintenance-free battery is more convenient to use.

What is wrong with the battery?

Before talking about the maintenance of the battery, let's talk about the misunderstanding of the battery. Parking can not be listened to music can not be the biggest misunderstanding, in fact, the battery is not as fragile as imagined, for most of the current battery capacity, parking a little hour of music has no problem. There is also a misunderstanding that the same car's battery is the same, in fact, even if the same model, there are some differences in the configuration of different batteries, such as automatic start and stop function.

For the same car, if the configuration has an automatic start-stop function, when the start-stop system works frequently, the battery's power will drop rapidly, and the battery will always be in a deep discharge state, especially in the congested road section. Therefore, a vehicle with a start-stop function requires a battery with a strong deep discharge capability, which requires a larger battery capacity and starting current. So if your car has a difference between the automatic start and stop and the non-automatic start and stop version, you must pay attention to distinguish the battery model when replacing the battery.

How to extend the life cycle of the battery?

In fact, those mentioned above are not very useful for most car owners, because the replacement of the battery directly to the repair factory or 4S shop will be replaced. The biggest significance for the owner is how to maintain the battery and extend the life cycle of the battery. The way to extend the battery life cycle is nothing more than preventing the battery from being over-discharged and damaged. Therefore, Mr. Qi also summarized the following points.

Turning off the engine and then using the electric equipment in the car for a long time is very easy to cause excessive discharge, such as sound, lighting, air conditioning. For new batteries, these electric devices are not problematic for dozens of minutes except for the lights, but If the battery is already aging, try to avoid it. In addition, the inverter of the vehicle power supply and the high-power electric equipment provided by the inverter, such as a small vacuum cleaner, a gas pump, etc., must be used after the vehicle is used.

When the engine is started, the battery will discharge with a large current, but a large current discharge for a long time will greatly damage the battery. Therefore, each start-up time should not exceed 5 seconds, avoiding long-term high-current discharge to make the battery lose power. If the start-up is unsuccessful, the next start must be separated by more than 10 seconds, which can make the battery have some buffer to prevent battery damage.

What needs to be done is to check regularly whether the positive and negative connecting wires of the battery are loose. If it is loose, it should be tightened in time. Also check regularly whether the small holes in the battery cover are ventilated. 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.

The last point is about the problem of long-term parking. Many old drivers will tell you that if the vehicle is parked for a long time, it must be opened regularly, or the positive and negative poles of the battery should be removed. This time the old driver is really right. The reason is that there is always the presence of impurities in the manufacturing process of the battery, so the battery will inevitably have an automatic discharge phenomenon. If the vehicle is not started for a long time, the battery is very likely to be over-discharged, resulting in battery damage. Therefore, if the vehicle is to be parked for a long time, it must be guaranteed to open once a week or directly remove the positive and negative poles of the battery.

How do you know that the battery is still not used?

I want to know if the battery is still in use, I have to know if the battery has electricity. For maintenance-free batteries, it is very simple to check the battery. Generally, there is a power indicator hole on the top of the battery. The green color is normal. If it is light yellow or colorless, the battery is low and needs to be replaced in time. If the battery does not have a power indicator hole, then you can go to the repair shop or 4S shop regularly to check with a professional battery tester.

For the maintenance-free battery, once the battery efficiency is greatly degraded, there is really no need to believe that the service technician can repair it, because the method can temporarily improve the performance in a timely manner, but it will not return to the old state after a long time. So replacement is the best way. In addition, Mr. Qi suggested that if the battery of the car is used for more than 4 years, even if there is no problem, it is better to try to replace it. If it is unable to start, the rescue cost is actually quite a lot.