BMS 5S 18V 100A

Reliable 5S 18V 100A BMS (Battery Management System) for Li-ion / Li-Po packs. The module balances the cells and provides overcharge and over-discharge protection, thus extending battery life and increasing safety in powerful 18V systems.

Customization

• 5S (Class 18V) e-mobility, tools, UPS, LED, audio and DIY projects
• 18 V auxiliary branches for electric bicycles/scooters, powerful power modules

Main functions

• 5 channel balancing (5S): reduces cell imbalance during charging
• Protections: overload, over-discharge, over-current and short circuit
• Continuous discharge up to 100 A – stable operation at high loads
• Low internal resistance – less heat loss, higher efficiency
• Temperature control (if the model has sensors)

Specifications

• Number of cells: 5S (5 cells in series)
• Chemistry: Li-ion / Li-Po
• Nominal voltage: ~18.5 V (often denoted 18 V)
• Max. Charging voltage: ~21,0 V (4,2 V × 5)
• Continuous discharge: 100 A
• Balancing: passive, 5 channels
• Protection: OC/OD/SC/Over-current (+ temperature on models with sensors)

Installation notes

• Follow the terminal diagram: B-, B1, B2, B3, B4, B5(=B+), P-/P+, C-/C+ (if charging/discharging separated)
• Perform the first start-up without load, check the voltage of each group
• Charge with CC/CV ~21.0 V charger (5S Li-ion)
• Use wires of the appropriate cross-section and install a fuse in the battery line; provide ventilation

FAQ

Is it suitable for 18650/21700 cells?
Yes, if the pack is 5S Li-ion/Li-Po and the current and cooling requirements are met.

Can charging be done via BMS?
Yes, with a 5S Li-ion CC/CV (~21.0 V) charger.

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