How to save lithium battery

New method of mobile phone battery longevity Battery maintenance:

In order to ensure the safety of the secondary battery during charging and discharging and to meet the performance requirements of its design, the following precautions and tips are summarized:

1) Suitable use and storage environment

Whether it is nickel or lithium, it imposes strict requirements on the temperature and humidity of the environment during use or storage. Among all environmental factors, temperature has the greatest influence on the charge and discharge performance of the battery. The electrochemical reaction is related to the ambient temperature and the electrode/electrolyte interface is considered the heart of the battery. If the temperature drops, the reaction rate of the electrode also decreases. Assuming that the battery voltage remains constant, the discharge current decreases, and the power output of the battery also decreases. If the temperature rises, the opposite is true, that is, the battery output power will rise, and the temperature also affects the transfer speed of the electrolyte. The temperature rises, the transfer temperature decreases, the transfer slows down, and the battery charge and discharge performance is also affected. However, if the temperature is too high, exceeding 45 ° C, the chemical balance in the battery will be destroyed, resulting in side reactions. Excessive ambient humidity will accelerate the self-discharge rate of the battery, which is not conducive to long-term storage or even short circuit of the battery.

The secondary battery has a wide range of applicable temperature and humidity -20 ° C ~ 65 ° C 65 ± 20%, but the best charging and discharging efficiency when the ambient temperature and humidity is 10 ° C ~ 30 ° C 65 ± 20% An inappropriate temperature and humidity environment can cause the following problems to occur:

1. Too low ambient temperature may cause the battery to have no voltage output, resulting in failure to boot.

2. When the charge and discharge temperature is below -10 °C and above 45 °C, the charging efficiency of the battery will decrease, so the digitally reported battery can not reach its design capacity when discharged. There is even a battery leak due to performance degradation.

Short-term storage: store the battery in a dry, non-corrosive gas, temperature and humidity between -20 ° C ~ 35 ° C 65 ± 20%, above or below this temperature and humidity will cause battery metal parts rust or battery A leak has occurred.

Long-term storage: Since long-term storage will accelerate battery self-discharge and active substance passivation, the ambient temperature and humidity are suitable between 10 °C and 30 °C and 65±20%, and at the same time, to reduce the long-term storage of the battery (such as more than one year). The negative effect of discharge and active material passivation, the battery needs to do a charge and discharge cycle every three months to restore its original performance.

2) The correct way to use.

The battery is a consumable item, and its life is certain (the number of charge and discharge is usually 300-500 times), so mastering the correct method of use is the secret of the battery "longevity".

Different types of batteries have different charging requirements. Nickel-metal hydride is prone to heat and high temperature during charging. If heat cannot be dissipated in time, it is easy to cause battery degradation or irreversible damage or even explosion. Generally, according to the requirements of the manual, the charger (or original charger) attached to the battery can be used to charge the battery. Avoid uninterrupted charging for a long time and charge with a charger that does not meet the requirements (especially low-end charging). The device has no protection function) to avoid damage or danger. The correct method should be to charge with a qualified or original charger, and remove it after the time is full.

Usually, the lithium battery has a relatively complete protection function (with a protection board). There are not many other requirements when charging the battery, but it is not recommended to prevent charging for a long time to prevent the safety problem caused by the failure of the protection board overcharge protection function. When the battery is fully charged, remove it. In addition, you must use the charger supplied with the original or the battery, and follow the instructions for operation and use. Otherwise, the battery may be damaged or even dangerous. The lithium battery is more likely to be exposed to fire than other types of batteries. Many, recently APPLE, DELL have similar cases; In addition, the battery or charger when charging should not have flammable and explosive items, such as: newspapers and magazines.

Before using the battery, check whether the load is met. If the load cannot meet the load requirement or the high current (more than 1C), the battery will be damaged or the service life will be shortened. It is strictly forbidden to use the special battery for other equipment.

3) Good habits

1.       With a suitable battery

When replacing the battery, be sure to find out the type and size of the battery used in the machine and replace it with the same battery model.

2. Clean the positive and negative contacts

Since dust and dirt can affect the electrical conductivity, you need to occasionally clean the positive and negative metal contacts in the battery compartment.

3. Remove and replace in time

When you see the prompt “Battery is low”, you should charge it in time. Do not remove the discharged battery without charging, which may cause permanent damage to the battery due to over-discharge; if the appliance is no longer used for a long period of time Use, it is best to take out the battery and put it in a low temperature, dry place, otherwise the appliance will be turned off, the system will still have a low current output, which will shorten the battery life.

4. Low temperature use and storage

Try to avoid the outdoor battery in extreme cold weather, pay attention to the temperature outside the battery; storage in the low temperature environment can slow down the battery's own discharge rate, but pay attention to avoid dew before use.

5. To prevent short circuit

Connecting the outer two ends of the battery to any conductor will cause an external short circuit. The battery type is different, and the short circuit may have different severity consequences. Such as: the battery cannot be used, leaking, exploding, etc., do not put the battery into a humid environment, and cannot be mixed with the conductor, such as the key in the pocket, the battery, may cause a short circuit.

Lithium batteries are used more and more widely in modern production and life because of their large capacity and no memory effect, especially those products such as mobile phones and computers, which are not equipped with lithium batteries! In general, some mobile phones will be equipped with a spare battery. If the backup battery is charged, how can it be saved to ensure that its energy is not lost?

Lithium primary battery

Also called a lithium battery, it can be discharged continuously or intermittently. Once the power is exhausted, it can no longer be used, and is widely used in electronic products such as cameras that consume less power.

The lithium primary battery has a very low self-discharge and can be stored for 3 years. It can be stored under refrigerated conditions and the effect will be better. It is a good idea to store the lithium primary battery in a low temperature place. Note: Lithium primary battery is different from lithium ion battery. Lithium primary battery can't be charged, charging is very dangerous!

2. Lithium ion battery

Also known as secondary lithium battery, it can be stored for more than half a year at 20 ° C because of its low self-discharge rate and most of its capacity can be recovered.

The self-discharge phenomenon of lithium battery, if the battery voltage is stored for less than 3.6V for a long time, it will cause the battery to over-discharge and damage the internal structure of the battery and reduce the battery life. Therefore, the lithium battery stored for a long time should be recharged every 3 to 6 months, that is, the charging voltage is 3.8~3.9V (the optimal storage voltage of the lithium battery is about 3.85V), and the temperature should be kept at 40%-60%. It should not be full. The battery should be stored in a dry environment at 4 ° C ~ 35 ° C or moisture-proof packaging. Keep away from heat and keep out of direct sunlight.

Lithium batteries have a wide temperature range and can be used outdoors in the winter in the north, but the capacity will be much lower. If you return to room temperature, the capacity can be restored.

Of course, when the lithium battery is just bought, there is only a little electricity. This is because the storage performance of the lithium battery is an important parameter to measure the stability of the comprehensive performance of the battery. The lithium battery manufacturer will store the newly produced lithium battery after a certain period of time. After that, it is allowed to be sold at the factory. This is to stabilize the electrochemical performance of the components inside the lithium battery in order to ensure the quality of the battery. So everyone has to charge in advance before using it.

The page contains the contents of the machine translation.