Product Description
Overview
The 7S 24V 20A BMS is the primary safety controller for any 7-cell (24V/25.9V) Lithium-ion battery configuration. It acts as a sophisticated gatekeeper, monitoring the voltage and current of the entire pack in real-time. The standout feature of this module is its integrated balancing circuit, which ensures that all seven cells reach their full charge simultaneously, preventing “weak links” in your power system. It is robust enough for high-drain applications like e-bikes and small solar storage banks.
Key Features
Active Protection Suite: Safeguards your battery pack against overcharge, over-discharge, over-current, and short-circuiting.
Onboard Cell Balancing: Redistributes charging current to ensure every cell in the series stays at the same voltage level, significantly extending the pack’s lifespan.
High Current Capability: Supports a steady 20A continuous discharge, making it ideal for 24V DC motors and heavy-duty power tools.
Low Heat Generation: Built with high-quality MOS tubes and an efficient PCB layout to manage thermal output during high-load operations.
Includes Wiring Harness: Comes with a matching 8-pin ribbon cable for organized and secure connections to each cell junction.
Applications
Electric Vehicles: Perfect for 24V electric scooters, e-bikes, and motorized wheelchairs.
Solar Energy Storage: Used in 24V off-grid solar systems for street lights and backup power.
Industrial Equipment: Ideal for 24V cordless power tools, garden equipment, and portable sprayers.
Custom UPS Systems: Build reliable 24V battery backups for networking equipment or home electronics.
Technical Specifications
| Feature | Specification |
| Battery Chemistry | Lithium-Ion (3.7V Nominal / 4.2V Full) |
| Series Configuration | 7S (7 Cells in Series) |
| Continuous Discharge Current | 20A (Steady State) |
| Peak Instantaneous Current | 40A (Transient) |
| Charging Voltage | 29.4V DC |
| Overcharge Voltage Limit | 4.25V ± 0.05V (per cell) |
| Over-discharge Voltage Limit | 2.55V ± 0.08V (per cell) |
| Balancing Current | 30mA – 45mA |
| Internal Resistance | ≤ 20mΩ |
Technical Documentation: Manufacturer Data Sheet for 7S 24V 20A BMS (Model: HXYP-7S-20A-T)
Wiring Connection Guide
B-: Connect to the total negative terminal of the 7-cell pack.
B1 through B6: Connect to the intermediate junctions in numerical order.
B7 (B+): Connect to the total positive terminal of the pack.
P-: Load and Charging Negative.
P+: Load and Charging Positive.
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