21700 1S1P 5000mAh Battery
The 21700 1S1P 3.7v 5000mAh battery is a common lithium-ion battery widely used in various digital electronic products. It comes with a built-in 1S1P protection board, providing overcharge, over-discharge, overcurrent, and short-circuit protection.
We can provide UL1642, IEC62133, MSDS, and UN38.3 certifications according to customer requirements.
- UL1642
- IEC62133
- UN38.3
- MSDS
Li-ion battery 21700 1s1p 5000mAh Specs
-
Charging Voltage 4.2V
-
Nominal Voltage 3.7V
-
Nominal Capacity 5000mAh
-
Discharge Cut-off Voltage 3V
-
Charge Current 2.5A
-
Max Charge Current 5A
-
Discharge Current 2.5A
-
Max Discharge Current 5A
-
Operatingt Tmperature -20~60℃
-
Dimension 22*22*72mm
-
Weight 50g
-
Lifespan 500
-
PCM Yes
-
Customization Yes
18650 battery pack factory
21700 battery 5000mah protected with bms
We produce high quality 21700 batteries with built-in protection boards against overcharge, overdischarge and short circuit protection. It needs to be charged with constant current constant voltage and constant voltage charger. It is suitable for all kinds of electronic devices that need 3.7V power supply.
The charging and discharging currents can be generated according to customer requirements, such as 1.0C and 3.0C discharge rates. Besides 18650 1S1P batteries, we can also customize different 18650 battery packs.
On the right is an example of our 21700 battery structure diagram. He is made of precise nickel strips welded to connect positive and negative to ensure a stable charging and discharging curve and provide reliable power.
18650 battery pack factory
21700 battery packs charge & dishcarge curve
18650 12S2P 44.4V 5Ah battery pack charge and discharge curve. You will find the curve flat from 0.2C, 1C, 2C, 3C rate discharge current.
- 18650 12S2P 5Ah battery 0.2C discharge curve
- 18650 12S2P 5Ah battery 1C dsicharge curve
- 18650 12S2P 5Ah battery 2C discharge curve
- 18650 12S2P 5Ah battery 3C discharge curve
18650 battery pack PCM & connectorselection
best 21700 battery 5000mah PCM & connectors
The main function of 21700 lithium battery protection board ensures the safe and normal operation of the battery, as follows:
- Overcharge protection: usually charging cut-off protection voltage 4.28±0.025V, once the charging cut-off voltage is reached, the protection circuit will be disconnected.
- Over-discharge protection: usually over-discharge cut-off voltage voltage 3±0.025V, once the over-discharge cut-off voltage is reached, the protection board will be disconnected.
- Short circuit protection: Once short circuit occurs, the protection board will disconnect the circuit automatically in a few milliseconds.
- Over-current protection: once the protection board reaches the set current value, the protection board will automatically disconnect.
The mainstream terminal models of 21700 battery packs are as follows:
- JST-XH, JST-PH, JST-SM
- Molex 51021, Molex 5557, Molex Micro-Fit 3.0
- Amphenol AT Series, Amphenol PT Series
- TE AMP Superseal, TE Micro MATE-N-LOK
Lithium-ion battery production process
#1 Cell Selection
Select the number of 18650 cells or LiFePO4 cells we need. Ensure they works fine.
#2 Battery Sorting
Make sure that the capacity, voltage, and internal resistance of the selected cells are consistent.
#3 Arrangement & Assembly
Combine the required battery modules in a series-parallel manner.
#4 Spot Welding
The positive and negative terminals of the battery are connected via nickel tabs to form the desired capacity or voltage.
#5 Mounting Protection Board
Connect the protection board on the battery pack to ensure that its overcharge, overdischarge and short circuit protection functions properly.
#6 Packaging & Aging
Wrap the battery pack in a PVC or metal casing while charging and discharging to activate the battery pack performance.
Get Started
Get 5000mah 21700 li-ion battery quote today
We will evaluate your project and get back to you within 1 working day.
