Heltec DS1004 Display Active Balancer – 6S (NCM / LFP / LTO)
The Heltec DS1004 Display Active Balancer is a 6-series (6S) intelligent active balancing module with an integrated voltage display, designed for lithium battery banks requiring precise cell equalisation and real-time monitoring.
Unlike standard non-display balancers, this version provides live cell voltage visibility, allowing users to observe pack behaviour during charge, discharge, and balancing cycles without external diagnostic equipment.
Technical Specifications
Product Model: DS1004 (Display Version)
Series Configuration: 6S
Supported Chemistries:
NCM (Ternary Lithium)
LFP (LiFePO4)
LTO (Lithium Titanate)
Operating Voltage Range:
NCM / LFP: 2.7V – 4.2V
LTO: 1.8V – 2.7V
Balance Voltage Accuracy:
±5mV (typical)
Maximum Balance Current:
Up to 5A–5.5A (when cell delta ≈ 1.0V)
Current automatically tapers as voltage difference decreases
Minimum balance start differential: 0.01V
Undervoltage Sleep Protection:
NCM / LFP: 2.7V
LTO: 1.8V
Automatically enters protection sleep below threshold
Static Working Current:
Approx. 20mA
Sleep Mode Current:
<0.1mA
Operating Temperature Range:
-10°C to +60°C
External Power Requirement:
None – powered through internal energy transfer within the battery pack
Display Functionality (Key Difference)
The integrated display provides:
Individual cell voltage monitoring
Real-time voltage delta observation
Visual confirmation of balancing activity
Immediate identification of drift or abnormal cell behaviour
This makes it particularly useful in high-performance battery banks where monitoring voltage spread is critical.
Working Principle
The DS1004 uses a capacitive energy transfer active balancing architecture.
Instead of dissipating excess energy as heat, the system:
Transfers charge from higher-voltage cells
Redistributes energy to lower-voltage cells
Engages the entire battery group simultaneously in the balancing process
This method improves efficiency and maintains pack consistency without resistive bleed loss.
Hardware Construction
Ultra-low internal resistance MOSFET design
2oz copper thickness PCB for high current handling
Three-proof conformal coating:
Moisture resistant
Dust resistant
Corrosion resistant
Shock resistant
Anti-aging and insulation protected
Application Suitability
Designed for:
6S lithium battery banks
LTO banks operating in 1.8V–2.7V per cell ranges
Performance systems requiring voltage consistency
Installations where live voltage visibility is required

Reviews
There are no reviews yet.