Ultra-Fast Charging Shunt

I. Core Principle

• Current Sampling: Connected in series in the main fast-charging circuit. When high current passes through, a weak millivolt-level voltage signal is generated according to Ohm’s Law (V=I×R).
• Real-Time Monitoring: The BMS (Battery Management System) collects this voltage signal and accurately calculates the real-time charging current.
• Safety Control: Based on the monitored data, the BMS dynamically adjusts the charging power to prevent overcurrent and overheating, protecting battery cells.

II. Key Technical Features

• Ultra-High Current Rating: Standard ratings include 800A / 1000A / 1500A, with a maximum of up to 2000A, suitable for 1000V+ high-voltage platforms.
• Ultra-Low Internal Resistance & Low Power Loss: Made of special alloys (such as manganin and Karma) with optimized structure, featuring extremely low internal resistance (typically around 50μΩ), achieving low heat generation and fast heat dissipation.
• High Precision & Stability: Accuracy up to ±0.5% or higher, with minimal resistance drift across the full temperature range (-40℃~125℃), ensuring precise current monitoring.
• High-Efficiency Heat Dissipation Structure: Mostly adopts integrated copper substrate or laminated heat dissipation design, combined with air/liquid cooling to quickly conduct heat generated by high current.
• High Reliability: Compliant with AEC-Q200 automotive qualification and IATF 16949 certification, featuring vibration resistance, corrosion resistance, and long service life.

III. Core Functional Advantages

• Battery Lifespan Protection: Avoids direct high-current impact on battery cells, suppresses current fluctuations, controls charging temperature within a safe range, and reduces battery aging.
• Guaranteed Ultra-Fast Charging Speed: Low-loss design does not compromise charging efficiency, supporting ultra-fast charging demands such as “400 km range from 5 minutes of charging”.
• System Safety Barrier: Provides real-time overcurrent detection, serving as the first critical line of defense against thermal runaway and triggering system protection.
• Adaptation to Extreme Environments: Maintains stable accuracy and performance even at -40℃ extreme cold or high-temperature conditions.

IV. Main Application Scenarios

• New Energy Vehicles (EV/PHEV): Current sampling for on-board OBC (On-Board Charger) and BMS.
• Ultra-Fast Charging Stations: 480kW, 800kW, 1500kW high-power liquid-cooled charging piles.
• Energy Storage Systems: High-current charge/discharge circuit monitoring for large-scale energy storage power stations.
• Special Vehicles: High-power equipment such as electric heavy trucks, construction machinery, and electric ships.