5S 25A Lithium Ion BMS module – For 21V Li-ion Battery

This is 5s 25A Lithium Ion BMS module for 21v battery. Five batteries (18650) can be connected simultaneously to this charge-discharge controller module. The module has protection against short circuit, overcharge, and over-discharge. One of the functions of the charge controller is to turn off the power supply for the batteries when the maximum capacity of at least one battery is reached. The maximum allowable current is 25 A.

If the maximum permissible value of the supply voltage is exceeded, the charge controller activates the “protection” mode. In order to restore the module, it is necessary to re-apply voltage to the input of the BMS board or wait a while until the charge controller automatically disables protection.

Specifications

• Charge voltage:  21V
• Charging current:  15A(max)
• Continuous Discharge Current: 15A(max)
• Instantaneous discharge current: 25A
• Over-charge detect: 4.28±0.05V
• Over-charge release: 4.28±0.05V
• Over-discharge Protect Over-discharge detect: 2.55±0.08V
• Short-circuit Protect Protect condition: Cut load
• Over-current Protect Detect voltage: 150mV
• Current detect: 30±3A
• Inner Resistance: ≤20mΩ
• Self-consumption Working current: ≤30uA
• Working Temperature Range: -30 to +80
• Small size designed for a four-cell battery pack
• Over-charge/Over-discharge Protection