The Keysight E4370A Multi-Cell Charger/Discharger Mainframe is a modular test platform engineered for high-density battery cell formation and validation in production environments. This scalable system houses up to four charger/discharger cards, delivering simultaneous charge and discharge operations across 256 channels. Independent control and measurement per channel, combined with real-time data acquisition and integrated safety architecture, enable efficient energy cycling for lithium-ion cell development across automotive, energy storage, and portable electronics sectors.
Technical Specifications
Mainframe Architecture
• Accommodates up to four charger/discharger cards
• Supports up to 256 simultaneous charging and discharging channels
• 256 power supply outputs per mainframe
• 256 electronic loads per mainframe
• Requires external fixed 24 V power supply
• Weight: 50 lbs
• Dimensions: 24 × 20 × 16 in
Channel Ratings per Card
• E4374A: 64 channels at 5 V, 2 A per channel
• E4375A: 64 channels at 5 V, 3 A per channel
Charging and Discharging Modes
• Constant current (CC) charging
• Constant voltage (CV) charging
• Constant current (CC) discharge
– Key Features
• Modular card-based architecture for configuration flexibility
• Independent channel control and measurement across all active cells
• Real-time monitoring and data acquisition
• LAN connectivity for autonomous multi-unit operation and program sequence downloads
• Serial and digital ports for local manufacturing automation control
• Multiple integrated safety features
– Typical Applications
• Lithium-ion cell formation in high-volume production
• Battery pack validation and characterization
• Thermal and cycling performance assessment
• Energy storage system testing
• Portable device battery development
– Compatibility & Integration
The E4370A mainframe integrates with E4374A and E4375A charger/discharger cards. The system works with the E4371A Powerbus Load for discharge applications, forming a complete multi-cell test solution.
