#1-What Are the Advantages and Disadvantages of Rechargeable Batteries?
The advantage of rechargeable batteries is that they have a long service life. Even though they are more expensive than primary batteries, they are very economical from the point of view of long-term use, and the load capacity of rechargeable batteries is higher than that of most primary batteries. However, the discharge voltage of ordinary secondary batteries is basically constant, and it is difficult to predict when the discharge will end, so it will cause certain inconveniences during use. However, the lithium ion battery can provide the camera equipment with a longer use time, high load capacity, high energy density, and the drop of the discharge voltage will weaken with the depth of the discharge.
Ordinary secondary batteries have a high self-discharge rate, so they are suitable for high-current discharge applications such as digital cameras, toys, power tools, emergency lights, etc., and are not suitable for small current discharge occasions such as remote controls, music doorbells, etc. Places that are not suitable for long-term intermittent use, such as flashlights. At present, the ideal battery is a lithium battery, which has almost all the advantages of the battery, and the self-discharge rate is extremely low. The only disadvantage is that the charging and discharging requirements are very strict, which is a guarantee of life.
#2-What Should Be Paid Attention to When Charging the Rechargeable Batteries?
2.1 Choose a suitable charger.
The charger is a static converter device that uses power electronic semiconductor devices to convert alternating current with a constant voltage and frequency into direct current. There are many chargers, such as lead-acid battery chargers, valve-regulated sealed lead-acid battery testing and monitoring, nickel-cadmium battery chargers, nickel-metal hydride battery chargers, lithium-ion battery chargers, lithium-ion battery chargers for portable electronic devices, Lithium-ion battery protection circuit multi-function charger, electric vehicle battery charger, etc.
When choosing a charger, it is best to use a charger with a correct charging device to prevent the battery from shortening its service life due to overcharging. Generally speaking, slow charging can prolong the service life of the battery better than fast charging.
2.2 Avoid overcharging.
Overcharge refers to the behavior of the battery being fully charged after a certain charging process, and then continuing to charge. Under normal circumstances, the internal pressure of the battery will not increase significantly, but if the charging current is too large, or the charging time is too long, the oxygen generated is too late If it is consumed, it may cause internal pressure to rise, battery deformation, liquid leakage and other undesirable phenomena. At the same time, its electrical performance will also be significantly reduced.
#3-What Should Be Paid Attention to When Discharging the Rechargeable Batteries?
3.1 The depth of discharge is the main factor affecting battery life.The higher the depth of discharge, the shorter the battery life. In other words, as long as the depth of discharge is reduced, the service life of the battery can be greatly extended. Therefore, we should avoid over-discharging the battery to a very low voltage.
3.2 Avoid discharge at high temperature?When the battery is discharged at a high temperature, the service life of the battery will be shortened.
3.3 If the designed electronic equipment cannot completely stop all current, if the equipment is left unused for a long time without taking out the battery, the residual current will sometimes cause the battery to be excessively consumed and cause the battery to over-discharge.
3.4 When using batteries with different capacities, chemical structures or different charge levels, and a mix of old and new batteries, the batteries will discharge too much, or even lead to reverse polarity charging.
3.5 After the battery has discharged the internally stored power and the voltage reaches a certain value, continued discharge will cause over-discharge. The discharge cut-off voltage is usually determined according to the discharge current. Over-discharge of the battery may bring catastrophic consequences to the battery, especially high-current over-discharge or repeated over-discharge, which will have a greater impact on the battery. Generally speaking, over-discharge will increase the internal voltage of the battery and the positive and negative active materials The reversibility is destroyed, even if it is charged, it can only be partially restored, and the capacity will be significantly attenuated.
#4-What should be paid attention to when storing rechargeable batteries?
If the battery is stored at a high temperature for a long time, its electrode activity will be attenuated and its service life will be shortened.
4.1 The storage temperature of conventional lithium batteries must be within 18-25 degrees, which is the same as the transportation temperature control requirements. If there are differences, you can do corresponding coordination and technical maintenance according to product characteristics.
4.2 The storage environment is suitable for proper ventilation and drying, and the humidity of the environment is effectively controlled to prevent the battery from being exposed to high humidity for a long time.
4.3 Keep away from fire sources.
4.4 Lithium batteries should be stored in locations that are not exposed to direct sunlight or rain. If the batteries are drenched, the insulation resistance will decrease, and self-discharge and chlorination may occur. The temperature rise then damages the normal function of the battery.
4.5 To eliminate and avoid friction, collision and throwing parts to the greatest extent, to avoid accidents such as combustion and explosion, and to do corresponding isolation operations.
4.6 For batteries that have not been used for a long time, they should be charged regularly, usually once every 3-6 months. We know that the rechargeable battery itself will self-discharge, if it is not charged for a long time, it will reduce the performance of the battery.
