11.1V 2200mAh 18650 Lithium Battery for Ventilator

The full voltage of the 11.1V 18650 battery pack is 12.6V, the nominal voltage of all 11.1V li ion battery packs on the market is 3.7V, the full charge voltage of a single cell is 4.2V, and the battery structure is all 3 strings connection, the calculation method of the fully charged voltage of the 11.1V lithium battery pack is as follows:

3.7V×3 series = 11.1V (nominal voltage)

4.2V×3 series = 12.6V (full charge voltage)

3S lithium batteries are often used in ducted aircraft, fixed wings, helicopters and other aircraft models, with stable discharge and wide operating temperature; large charging current is allowed, charging speed is fast, and it can be fully charged in only 1~2 hours; no memory effect ; low self-discharge rate and long storage life; high energy and high storage energy density; high output voltage (the rated voltage of a single-cell lithium battery is generally 3.6V, while the voltage of a single-cell NiMH and NiCd battery is only 1.2V), etc. advantage.

But lithium batteries also have a squeamish side in their use. When charging the lithium battery, it is necessary to prevent overcharging. If the charging voltage is higher than the specified voltage or the charging current is greater than the specified current, the lithium battery will be damaged or scrapped. In the case of overcharging, the temperature of the lithium battery with excess energy rises, and the electrolyte will decompose to generate gas, which will increase the internal pressure and cause the risk of spontaneous combustion or rupture.

Usually the termination charging voltage of a single-cell lithium battery is 4.2V, the accuracy is controlled within ±1%, and the charging current is not more than 1C (C represents the charging and discharging rate, 1C represents that the battery is fully charged or discharged within 1 hour. required rate). Lithium batteries should also be prevented from being over-discharged during use. Over-discharging will lead to deterioration of battery characteristics and durability, and reduced rechargeable times. Usually, the discharge current is required to be no more than 2C, and the termination discharge voltage is controlled at about 2.4~2.7V.

FAQ of lithium batteries 18650:

1. What are charge balance and static balance?

   Charge balance: Only when there is charging current, the battery reaches the set balance voltage, and the highest string and the lowest voltage difference reach the set value, will the balance be turned on;Static balance: In the case of no charging current, the battery will reach the set balance voltage, and the highest string and the lowest voltage difference will reach the set value, and then the balance will be turned on.

2. How to use lithium battery comprehensive tester?

   Briefly describe, the use of lithium battery comprehensive tester is to test the performance of lithium battery, including voltage, internal resistance, capacity, self-discharge rate, cycle life, sealing performance, safety performance, storage performance, appearance, etc., etc. Overcharge, over-discharge, etc.The lithium battery comprehensive tester is one of the lithium battery testing equipment that belongs to the lithium battery assembly equipment. This link of the lithium battery comprehensive tester is equivalent to the last step, that is, after the entire lithium battery pack is welded, can it be used? Whether it is safe or not is to use a comprehensive tester to test, if it is qualified, it is equivalent to this lithium battery is a finished product and can be sold to the market.

3. How to charge 3S lithium-ion battery?

   The battery must be charged in the appropriate charger only. Never use a modified or damaged charger.3.2 Do not leave battery in charger for over 24 hours.3.3 Charging current: Can not surpass the biggest charging current which in this specification 1C rate of 2.2A.3.4 Charging voltage: Does not have to surpass the highest amount which in this specification of 12.8V.3.5 Charge temperature: The battery must carry on the charge in the ambient temperature scope which this specification defined.