BMS 13S 48V 40A

Compact BMS (Battery Management System) 13S for 48 V lithium batteries with balancing function. Provides basic over-charge and over-discharge protection to keep the pack safe and durable for loads up to 40A.

Customization

• Chemistry: Li-ion/NMC/NCA (13S, nominally 48 V; fully charged ~54.6 V)

• Use: e-bike, e-scooter, lightweight e-vehicles, 48V DIY packs

Key features

• Balancing between cells – equalises stresses, increases real capacity and longevity
• Protections: overloading and over-discharging (according to defined thresholds)
• Up to 40 A working load – stable operation under everyday loads
• 13S configuration – for standard 48 V system

Specifications

• Number of series: 13S (48 V nominal)
• Operating current: up to 40 A
• Full charge: ~54.6 V (Li-ion 4.20 V/elem.)
• Balancing: available (passive)
• Connectors B- (battery), C- (charging – discharging)

Installation guidelines

1. Connect the balancing bar B-, B1…B13 accurately according to the sequence of cells.
2. Use cables of the correct cross-section (for loads up to 40 A).
3. Do the first start-up with a fuse and check the cell voltages.
4. Observe the manufacturer’s voltage thresholds and polarity.

FAQ

Is it suitable for a 54.6 V charger?
Yes, this is a standard 13S Li-ion charger (54.6 V).

Does the BMS have short-circuit protection?
This version refers to over-/under-discharge protection; for short-circuit protection, please ask for the specific modification.

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