Saturday, December 13, 2025

Charged EVs | Hioki launches RM3546 meter for busbar welding high quality management

Hioki has introduced the RM3546 Resistance Meter, a high-precision measurement instrument designed for electrical car and vitality storage system battery manufacturing. The RM3546 targets nanohm-class resistance measurement, supporting the rising high quality calls for of high-volume battery manufacturing strains.

The RM3546 affords 1-nanohm decision inside a 1,000 microohm vary, utilizing the Superior-Offset Voltage Correction (A-OVC) characteristic to suppress thermal noise that may destabilize low-resistance measurements. This permits exact weld high quality management for busbars and connections crucial to EV and ESS battery packs all through analysis and growth, prototyping, and mass manufacturing.

To deal with the dangers of unintentional probe contact with energized elements, the RM3546 integrates Energetic Circuit Safety, permitting it to resist DC voltages as much as 60 V. Hioki says this safety reduces instrument failure and unplanned downtime on high-voltage battery manufacturing strains.

The meter contains a path-resistance tolerance of as much as 9 ohms in 500-milliamp mode, enabling secure measurements even with lengthy cables, a number of relays, or worn probes—situations generally encountered in large-scale automation. The instrument helps integration with Hioki multiplexer methods and consists of an inner multiplexer board choice for versatile, multi-channel inline inspection.

For post-weld analysis, the Superior-Temperature Correction (A-TC) perform—utilized in mixture with Hioki’s PC utility—permits correct resistance measurement inside seconds after welding, minimizing cooling delays and enhancing manufacturing takt time. Hioki identifies the primary functions for battery analysis and growth, inline inspection of battery-pack welding and verification of cell-to-cell and fuse resistance.

Further makes use of embody EV charging infrastructure elements and energy distribution methods in industrial contexts.

Supply: Hioki


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