Description
BAK 13S 48V 40000mAh 13S8P 3C Lithium-Ion Rechargeable Battery Pack
The BAK 13S 48V 40000mAh (40Ah) 13S8P 3C Lithium-Ion Rechargeable Battery Pack is a high-capacity NMC Lithium-Ion battery pack designed for 48V-class electric vehicles, e-bikes, electric scooters, energy storage systems, robotics, and industrial applications.
The pack uses a 13S8P configuration, consisting of 104 lithium-ion cells when built with 5000mAh cells. Eight cells are connected in parallel in each of the 13 series groups, providing approximately 40Ah capacity.
BAK 21700 cells in the 5000mAh/3C class are specified around 3.6V nominal, 4.2V maximum charge voltage and up to 3C discharge capability.
Key Features
- BAK Lithium-Ion Cells
- NMC Lithium-Ion Chemistry
- 13S8P Configuration
- 48V-Class Battery Pack
- 40000mAh / 40Ah Capacity
- 3C Cell Discharge Rating
- Approximately 1.87kWh Nominal Energy
- 104 Cells in 13S8P configuration
- High Energy Density
- Rechargeable Design
- Suitable for EV and E-Bike Applications
- BMS Protection Available
- Custom Connector & Enclosure Options
- OEM & Bulk Manufacturing Available
Battery Configuration
13S8P
13 series groups × 8 cells in parallel = 104 cells
Each parallel group contains eight 5000mAh cells:
8 × 5Ah = 40Ah
The 13 series groups provide:
13 × 3.6V = 46.8V nominal
Maximum charging voltage:
13 × 4.2V = 54.6V
Nominal energy:
46.8V × 40Ah = approximately 1,872Wh
High-Capacity 40Ah Design
The 40Ah capacity provides substantially longer operating time than smaller 48V battery packs.
This makes the battery suitable for applications where both high energy capacity and reliable continuous power are required.
The BAK 5000mAh 21700 specification lists approximately 18Wh nominal energy per cell, with a 3C maximum discharge rating in the referenced specification.
BMS Protection
A suitable 13S NMC BMS can be integrated into the battery pack to provide:
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Cell voltage monitoring
- Cell balancing
- Temperature monitoring, depending on BMS
For high-current applications, the BMS rating should be selected according to the controller’s continuous and peak current requirements.
Applications
The BAK 13S 48V 40Ah battery pack is suitable for:
- 48V E-Bikes
- Electric Scooters
- Electric Motorcycles
- Electric Vehicles
- Delivery Vehicles
- Solar Energy Storage
- Energy Storage Systems
- Robotics
- AGV Systems
- Portable Power Systems
- Industrial Equipment
- Custom OEM Battery Packs
Advantages
- High 40Ah capacity
- 13S8P configuration
- 104-cell battery design
- Approximately 1.87kWh energy
- High energy density
- BAK lithium-ion cells
- 48V-class system
- Suitable for long-range applications
- BMS options available
- Custom enclosure and connector options
- Suitable for OEM and bulk battery manufacturing
Package Includes
1 × BAK 13S 48V 40000mAh (40Ah) 13S8P 3C Lithium-Ion Rechargeable Battery Pack
