How much does temperature affect lithium batteries? What is the correct charge and discharge method?

Temperature has a certain influence on the lithium battery. Smart phones are now using lithium battery. How can we charge lithium battery properly?

1, mobile phone doesn't have to wait to charge all recharging after use. On the contrary, excessive discharge will damage the battery capacity.

2, mobile phone cannot charge/empty when idle, best charge to 50% of electricity, in a cool, dry place.

3, low temperature environment is reduced lithium electricity activity of the pool, it is temporary, will not have damage on the battery capacity. But if the battery work in low temperature environment for a long time and charge and discharge, may cause permanent damage to the battery capacity.

Mobile phone charging, it is a very simple thing. But there are always some let people confused about "charging myth". Today we have to carefully analyse these claims.

Claim 1: mobile phone battery must be with the recharging, so can extend battery life

Such doubts from the understanding of nickel batteries. For nickel cadmium battery, because the battery part of the charge (commonly known as electric useless over charge) will produce memory effects (battery contents in the process of crystallization, the effective electrode area) for temporarily reduce the battery capacity. Solution is all electric recharging after use.

And the life of the lithium battery, associated with the completion of charging cycle times. Apple's official website full charge cycle had done to explain. If you use (discharge) in power battery capacity of 100%, you'll complete a charge cycle, but not necessarily done through a single charge. For example, you may one day use 75% of the battery, and then at night will be charged equipment. If you use the 25% of electricity, so the total discharge will reach 100%, which has two days completed a charging cycle. May also need a few days to complete a charge cycle. After a certain number of recharge cycles, any type of battery capacity will be reduced. Lithium ion batteries capacity, with the completion of each charge cycle, and slightly decreased.

For lithium battery, excessive discharge (battery charge again) and excessive charge (up to 12 hours or more) of battery capacity has damage. Is the right way to use lithium battery, battery dissatisfaction can be filled, avoid battery run out to refill, avoid overcharge. However, the cell phone lithium battery, battery internal protection circuit will automatically stops charging.

Idea 2: the new battery need several times to fully charge and discharge to activate

First of all, about the new battery need activation, the answer is yes. But the most initial activation process of lithium-ion batteries in the battery factory has been finished by the manufacturer, before the activation of different cells may need some special way, users don't have to worry about.

Earlier nickel cadmium rechargeable battery and nickel metal hydride rechargeable batteries, because of the memory effect, users often give full charge and full discharge the battery is needed to get the best performance, it can also be called a form of cell activation.

The lithium battery in principle is not require users to activate. But as a result of the user first battery from the manufacture date there may be a few months to a year or two, to fully charge and discharge batteries to several times at this moment, can achieve the best performance of the battery and battery calibration of the chip. However, the need to avoid the battery to discharge depth remaining power control in 5% ~ 8%.

Claim 3: mobile phone to be charged/empty when idle

Battery when not in use, own also will slowly according to the law of discharge. If empty battery storage, its discharge will cause the battery discharge, further weakening the lithium ion activity and reduce the battery capacity. A full battery and storage, due to its strongest full charge state lithium ion activity, can increase the potential safety hazard damage battery. So to battery charger to 40-60%, stored in a cool, dry place for optimal, which is why the new cell phone battery is generally around 50%.If you are going to equipment for more than six months, every six months for the device should be charged to 50% capacity.

Statement 4: the low temperature will damage to the battery capacity

Lithium battery is the best temperature 0 to 35 degrees Celsius. Low temperature environment can reduce the activity of lithium ion, weakening the battery discharge capacity, use a shorter time. If the lithium battery is in low temperature environment of the time is shorter, the damage is only temporary, will not have damage on the battery capacity. When the temperature after recovery, performance will recover.

However, if the battery work in low temperature environment for a long time and charge and discharge, lithium battery anode surface will precipitate this irreversible process, can cause permanent damage to the battery capacity. Cold hands will automatically shut down, on the one hand is to protect the battery, on the other hand, is also its own battery manufacturing caused by unqualified and aging.

The page contains the contents of the machine translation.