Battery Management Connectivity
Wire-to-board connectors for BMS cell sampling, module interconnect and system-level integration
Battery Management Systems (BMS) are specialized electronic devices for monitoring and controlling battery packs. The core function is real-time battery state monitoring, ensuring operations within safe limits. BMS analyzes collected data and issues commands to adjust battery working conditions. A reliable BMS depends on precise, low-noise signal paths from individual cells through module-level aggregation to system-level communication — each layer requiring different connector specifications.
BMS connector design faces unique challenges at each hierarchy level:
Cell Sampling — requires ultra-compact connectors (1.0mm pitch) in confined battery module spaces, with <0.5mΩ contact resistance variance to maintain measurement accuracy within ±2mV.
Module-to-BMS — needs positioning walls to prevent mis-insertion during assembly, mechanical stability under vibration from vehicle or cabinet environments.
Board-Level Integration — requires mature, cost-effective connectors for auxiliary power and communication between BMS sub-boards.
High-Power Interface — demands 200A+ current capacity with simultaneous signal paths for power distribution units (PDU) and pack-level contactors.
Cell/Module Level — A1002 series (1.0mm pitch): Ultra-compact for individual cell voltage and temperature sampling. Ideal for space-constrained battery module interiors.
Module-to-BMS Level — A2001/A2002 series (2.0mm pitch): Positioning walls and pin protection for BMS acquisition board connections, providing mechanical stability under vibration. A2002 offers enhanced robustness for automotive-grade environments.
BMS Board Level — A2501 series (2.54mm pitch): Mature, proven solution for board-to-board connections and auxiliary power interfaces. Low-cost for high-volume applications.
IO and Power Interfaces — WLGSP002RW terminal blocks with screw-lock for BMS power inputs, anti-vibration, easy field maintenance.
High-Power BMS — ES01 (200A floating blind-mate, composite power+signal, eliminates tolerance issues during blind-mating) and ES04 (700A, modular signal section for customer cost optimization).
Product Sub-Series
DS24 Series Aviation Straight Cable Sheathed Male Plug for Cable Connection
GX20 Industrial GX Circular Connector, 10-pin Female Cable Plug
GX12 series M12 circular electrical connector, 4-pin double-faceted positioning male socket
DS16 Series Aviation Straight Cable Sheathed Male Plug for Cable Connection
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