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Controller Connectors for Battery Energy Storage Systems

BESS controllers require routing signal and power circuits in tight spaces with consistent performance under vibration and thermal cycling. Molex offers a wide range of compact and high-retention connectors that provide reliable power and signal transmission while streamlining system integration.

Connector Solutions for Space-Constrained BESS Controllers


Reliable BESS controller operation depends on protecting data signals from electromagnetic noise generated by high-power components. Engineers face additional challenges in fitting connectors and wiring into space-constrained BESS controllers without compromising performance. Excessive heat buildup in BESS controllers can degrade connector materials, reduce contact retention force and shorten service life.

To address these demands, design engineers need connectors with shielding and grounding features that maintain signal integrity and prevent communication errors in noisy environments. These connectors must be compact enough to allow efficient routing in tight areas without sacrificing performance or accessibility. Interconnect solutions engineered to withstand high temperatures by optimizing heat dissipation can also help maintain consistent performance and durability under prolonged thermal stress.

With strong locking mechanisms and electromagnetic interference (EMI) shielding, rugged Molex connectors maintain signal integrity and mechanical stability in high-vibration, noise-prone applications. These connectors combine power and signal in compact footprints, maximizing layout efficiency in space-constrained BESS controller boards. Molex high-current connectors also feature rugged housings to guarantee long-term reliability under harsh thermal and mechanical conditions.

Controller Main Board Connectors for BESS


Main control boards within BESS controllers require robust, high-density connectors that ensure reliable power and signal transmission in dense layouts. Combining compact designs, modular versatility and high-retention locking features, Molex connectors provide dependable connectivity solutions for BESS controller main processing units. 

  Configuration Pitch Current (max.) Wire Gauge Circuits Locking
Mini-Fit Sr. Connectors Wire-to-board, wire-to-wire 10.00mm 50.0A 16 to 8 AWG 2 to 14 Positive lock
KK Connectors Wire-to-board, board-to-board 2.54, 3.96, 5.08mm (KK); 2.50, 3.00, 3.96mm (KK Plus) 7.0A (KK), 11.0A (KK Plus) 30 to 18 AWG (KK), 28 to 18 AWG (KK Plus) 1 to 40 (KK), 2 to 8 (KK Plus) Friction lock (KK), positive lock (KK Plus)
Micro-Fit Connectors Wire-to-board, board-to-board 3.00mm 10.5A 30 to 18 AWG 2 to 24 Friction lock
MicroClasp Connectors Wire-to-board 2.00mm 3.0A 28 to 22 AWG 2 to 40 Friction lock
Micro-Lock Plus Connectors Wire-to-board 1.25, 2.00mm 4.7A 30 to 22 AWG 2 to 42 Positive lock

Controller Power and Ground PCB Interfaces for BESS


BESS controller boards need compact power and ground connectors capable of carrying high current loads while maintaining mechanical stability under vibration. Ideal for BESS applications, Molex’s durable and space-saving connectors ensure secure power and ground connections at various power levels.

  Configuration Pitch Current (max.) Voltage (max.) Wire Gauge Circuits
Mini-Fit Sr. Connectors Wire-to-board, wire-to-wire 10.00mm 50.0A 600V AC/DC 16 to 8 AWG 2 to 14
Sabre Connectors Wire-to-board, wire-to-wire 7.50mm 18.0A 600V 24 to 14 AWG 2 to 8
KK Connectors Wire-to-board, board-to-board 2.54, 3.96, 5.08mm (KK); 2.50, 3.00, 3.96mm (KK Plus) 7.0A (KK), 11.0A (KK Plus) 250V AC/DC 30 to 18 AWG (KK), 28 to 18 AWG (KK Plus) 1 to 40 (KK), 2 to 8 (KK Plus)
Micro-Fit Connectors Wire-to-board, board-to-board 3.00mm 10.5A 600V 30 to 18 AWG 2 to 24
Micro-Lock Plus Connectors Wire-to-board 1.25, 2.00mm 4.7A 250V AC (RMS)/DC 30 to 22 AWG 2 to 42

Busbars

High-current, low-impedance Molex busbars offer precise fit and reliable plating options, supporting space-saving power delivery for BESS controller interfaces.

Controller Communication and Networking Connectors for BESS


Communication systems in BESS controllers require compact, high-retention connectors that can maintain signal integrity under severe vibration and mechanical stress. Space-saving, vibration-resistant Molex connectors offer robust locking mechanisms and solderless termination options to ensure reliable data transmission while streamlining field installation.

  Configuration Pitch Current (max.) Voltage (max.) Wire Gauge Circuits
MicroClasp Connectors Wire-to-board

2.00mm

3.0A

250V

28 to 22 AWG

2 to 40

DuraClik Connectors Wire-to-board

2.00mm

3.0A

125V

26 to 22 AWG

2 to 15

Controller Sensor and Signal Input Connections for BESS


BESS controllers must combine multiple sensor signals in compact layouts, ensuring reliable data transmission in electrically and environmentally demanding conditions. Molex miniaturized connectors feature high-retention locking and environmental sealing options, enabling streamlined integration and precise signal transfer in harsh operating environments.

  Configuration Pitch Current (max.) Voltage (max.) Wire Gauge Circuits
Micro-Fit Connectors Wire-to-board, board-to-board 3.00mm 10.5A 600V 30 to 18 AWG 2 to 24
KK Connectors Wire-to-board, board-to-board 2.54, 3.96, 5.08mm (KK); 2.50, 3.00, 3.96mm (KK Plus) 7.0A (KK), 11.0A (KK Plus) 250V AC/DC 30 to 18 AWG (KK), 28 to 18 AWG (KK Plus) 1 to 40 (KK), 2 to 8 (KK Plus)
DuraClik Connectors Wire-to-board 2.00mm 3.0A 125V 26 to 22 AWG 2 to 15
Micro-Lock Plus Connectors Wire-to-board 1.25, 2.00mm 4.7A 250V AC (RMS)/DC 30 to 22 AWG 2 to 42

Controller User Interface and Access Ports for BESS


BESS controllers require reliable, space-efficient interconnects to support user interface components like displays, status indicators and diagnostic ports. Compact Molex connectors help ensure consistent power and signal transmission to interface components, enabling accurate system monitoring and efficient maintenance in BESS controllers.

  Configuration Pitch Current (max.) Voltage (max.) Wire Gauge Circuits
Micro-Fit Connectors Wire-to-board, board-to-board 3.00mm 10.5A 600V 30 to 18 AWG 2 to 24
MicroClasp Connectors Wire-to-board  2.00mm 3.0A 250V 28 to 22 AWG 2 to 40
Micro-Lock Plus Connectors Wire-to-board 1.25, 2.00mm 4.7A 250V AC (RMS)/DC 30 to 22 AWG 2 to 42