What is a 26650 lithium battery battery?

26650 Lithium battery is a type and specification of cylindrical lithium battery.Used in electric tools, lighting, landscape energy storage, electric vehicles, toys, instruments, ups backup power supply, communication equipment, medical equipment and military lights.The definition rule of the model is: the 26650 type, which refers to the battery diameter of 26mm, 65mm length, cylindrical battery.Generally used to call lithium batteries, including lithium primary batteries and lithium-ion batteries.Common useful nickel, cobalt and manganese cathode materials, lithium iron phosphate materials made of lithium battery ——INR26650-3.6V-4500mAh, IFR26650-3.2V-3200mAh.

Relevant parameters of the 26650 lithium battery

Circulation performance: 2,000 times (1C charge / 1C discharge, capacity retention rate of 80%, 100%DOD) Maximum continuous discharge current: 9.6A

Pulse discharge current: 15A, 5s

Operating temperature: charging: 0°C ~ 55°C; discharge: -20°C ~ 60°C

Storage temperature: -20°C ~ 45°C

Battery weight: 86 g (approx.)

The nickel-cobalt-manganese ternary lithium ion 26650 single section nominal voltage is generally: 3.6V

Nominal capacity: 4500mAh (capacity range of 4500-4650mAh)

AC internal resistance: 30m Ω (plus PTC type)

Charging conditions: cut-off voltage 4.2±0.05V, cut-off current 0.01C.(Note: Charge with 0.5C constant current to 4.2V, and constant voltage charge to current drop to 0.01C off)

Discharge cut-off voltage: 2.75V

Cycle performance: 500 times (1C charging / 1C discharge, capacity retention rate of 70%, 100%DOD)

Maximum continuous discharge current: 13A

Pulse discharge current: 15A, 5s

Operating temperature: charging: 0°C ~ 55°C; discharge: -20°C ~ 60°C

Storage temperature: -20°C ~ 45°C

Battery weight: 92 g (approx.)

diameter:26.2mm

Height: 65.6mm

Advantages of a 26650 lithium battery

1.26650 Lithium battery has overcharge performance: after the battery standard charging, measure the initial state of the battery, when the battery state is normal, charged with 3C current to 10.0V, and then transferred to constant voltage charging until the current of 0.01C is terminated.Observe the appearance change of the battery.Result: No fire, no explosion.

2.26650 Lithium battery has over-discharge performance: after the battery standard charging, measure the initial state of the battery, when the battery state is normal, discharge at 0.5C to 0 V.Observe the appearance of the battery.Result: No fire, no explosion.

3. It is difficult to short externally: After the battery is charged, measure the initial state of the battery, and directly short circuit the positive and negative electrode (the total resistance of the line is not more than 50m Ω), and the test ends when the battery temperature drops to about 10℃ lower than the peak temperature.Observe the temperature and appearance changes of the battery.Result: No fire, no explosion.

26650 lithium battery disadvantages

Because the 26650 lithium battery uses a small scope, and the performance status is also replaced by the 18650 lithium battery, so many manufacturers do not produce this battery.

Which are 26650 lithium batteries?It can’t be relatively comparable at once, but it depends on what area you have to use in.For example, 18650 lithium battery is used in lighting lamp battery, industrial supporting lithium battery pack, electric tool battery, electric bicycle battery, power lithium battery pack and other aspects, while 26650 lithium battery is applied in the integrated solar street lamp lithium battery pack, energy storage machine station, solar energy storage battery and other aspects.