Description
The 2S 20A 18650 Li-ion Battery Protection Board BMS is designed to provide protection and cell balancing for 2S lithium-ion battery packs. It is suitable for battery packs using two groups of compatible 3.7V Li-ion cells connected in series, giving a nominal pack voltage of 7.4V and a maximum charging voltage of 8.4V.
This 2S 20A BMS balance board helps manage the battery pack during charging and discharging while providing protection against common battery faults. The balance function is designed to help keep the voltage of the individual cell groups more evenly matched during charging.
With its compact PCB design, the board is useful for DIY 18650 battery packs, portable electronics, power tools, robotics, backup power projects, and other custom lithium-ion applications.
Key Features
- Designed for 2S Li-ion battery packs
- Suitable for compatible 18650 lithium-ion cells
- 7.4V nominal battery pack voltage
- 8.4V maximum charging voltage
- Up to 20A current rating
- Balance version for 2S battery packs
- Provides battery protection during normal operation
- Compact PCB design for DIY battery projects
- Suitable for rechargeable lithium-ion battery applications
- Useful for custom battery pack assembly and replacement projects
Applications
The 2S 20A BMS protection board can be used in:
- 2S 18650 Li-ion battery packs
- DIY lithium-ion battery assemblies
- Portable electronic devices
- Power tool battery packs
- Robotics projects
- RC and hobby electronics
- Portable power projects
- Rechargeable backup power systems
- Custom battery-powered equipment
2S Battery Configuration
A 2S battery pack consists of two compatible Li-ion cells or cell groups connected in series.
- Nominal voltage: 7.4V
- Fully charged voltage: 8.4V
- Battery chemistry: Li-ion
- Configuration: 2S
For safe and reliable operation, use compatible cells with similar specifications and condition. The BMS should be correctly connected to the battery cells according to the markings provided on the actual PCB.
Balance Function
The balance version of this BMS is designed to help maintain a more consistent voltage between the two series-connected battery groups during charging. Cell balancing is important in multi-cell lithium-ion battery packs because differences between cells can develop over repeated charging and discharging cycles.
Protection Functions
The board is designed as a battery protection and management circuit for a 2S Li-ion pack. Protection functions can help protect the battery pack from conditions such as:
- Overcharging
- Over-discharging
- Excessive current
- Short circuit
Note: Protection thresholds and exact operating characteristics can vary by board version. Always verify the markings and technical specifications of the actual board before installation.
Specifications
| Specification | Details |
|---|---|
| Product Type | 2S Li-ion BMS Protection Board |
| Battery Chemistry | Li-ion |
| Battery Configuration | 2S |
| Compatible Cells | 18650 and compatible Li-ion cells |
| Nominal Pack Voltage | 7.4V |
| Maximum Charging Voltage | 8.4V |
| Current Rating | Up to 20A |
| Balance Function | Yes |
| Protection | Battery protection functions |
| Board Type | Compact PCB |
| Application | 2S Li-ion battery packs |
Reviews
There are no reviews yet.