Description
BAK 10S 36V 40000mAh (40Ah) 10S8P 3C Lithium-Ion Rechargeable Battery Pack
The BAK 10S 36V 40000mAh (40Ah) 10S8P 3C Lithium-Ion Rechargeable Battery Pack is a high-capacity NMC Lithium-Ion battery pack designed for e-bikes, electric scooters, EVs, energy storage systems, robotics, and other high-power applications.
The 10S8P configuration uses 10 cells/groups in series and 8 cells in parallel in each group. When built using 5000mAh BAK 21700 cells, the pack provides approximately 40Ah capacity and 36V nominal voltage. BAK’s published 21700 5000mAh cell specifications list a 3.6V nominal voltage, 4.2V maximum charge voltage, and up to 3C discharge capability.
Key Features
- BAK Lithium-Ion Cells
- NMC Lithium-Ion Chemistry
- 10S8P Configuration
- 36V-Class Battery Pack
- 40000mAh / 40Ah Capacity
- 3C Cell Discharge Rating
- High Energy Capacity
- Approximately 1.44kWh Nominal Energy
- Rechargeable Battery Pack
- Suitable for E-Bike & EV Applications
- BMS Protection Available
- Custom Connector Options
- Suitable for OEM & Custom Battery Manufacturing
10S8P Battery Configuration
The pack is arranged as:
10 Series × 8 Parallel = 80 Cells
Each parallel group:
8 × 5000mAh = 40000mAh (40Ah)
Nominal pack voltage:
10 × 3.6V = 36V
Maximum charging voltage:
10 × 4.2V = 42V
Nominal energy:
36V × 40Ah = approximately 1,440Wh
3C High-Performance Cell Configuration
The BAK 21700 5000mAh cell specification identifies a 3C maximum discharge rate.
For an 8P arrangement, the theoretical cell-based current capability can be substantially higher than typical e-bike requirements. However, the actual safe pack current must be limited by the selected BMS, nickel/busbar construction, wiring, connectors, thermal design, and controller requirements.
Therefore, the 3C cell rating should not automatically be treated as the final continuous current rating of the complete battery pack.
BMS Protection
A suitable 10S NMC BMS can provide:
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Cell voltage monitoring
- Cell balancing
- Temperature monitoring, depending on BMS
The BMS current rating should be selected according to the motor/controller continuous and peak current requirements.
Applications
This BAK 10S 36V 40Ah battery pack is suitable for:
- 36V E-Bikes
- Electric Scooters
- Electric Bicycles
- Electric Tricycles
- EV Applications
- Delivery Vehicles
- Robotics
- AGV Systems
- Solar Energy Storage
- Energy Storage Systems
- Portable Power Systems
- Industrial Equipment
- Custom OEM Battery Packs
Advantages
- 40Ah high-capacity design
- 10S8P configuration
- 80-cell pack configuration
- Approximately 1.44kWh nominal energy
- High energy density
- BAK lithium-ion cells
- 36V-class system
- Suitable for long-range applications
- Multiple BMS options
- Custom connectors and enclosure options
- Suitable for OEM and bulk battery manufacturing
Package Includes
1 × BAK 10S 36V 40000mAh (40Ah) 10S8P 3C Lithium-Ion Rechargeable Battery Pack
