This instrument is designed to operate within the vehicle's standard 12-volt low-voltage electrical system, which powers the lighting, entertainment system, sensors, and various control units. Although the Wuling Hongguang's main drive uses a high-voltage platform, this mini-instrument efficiently draws power by connecting to the 12V network and uses CAN bus communication to exchange data with the vehicle's core control systems, achieving "transparent" monitoring of the high-voltage system status.

Its most crucial function is the real-time display of the traction battery's state of charge (SOC). For users of compact electric vehicles like the Wuling Hongguang MINI EV, accurately knowing the remaining battery charge is fundamental for planning trips and avoiding range anxiety. The instrument displays the SOC percentage through clear LEDs or a small digital screen, ensuring easy reading under various lighting conditions. Depending on configuration, it can also simultaneously display other key parameters such as battery voltage, current, and estimated remaining range.

CAN Protocol: The Foundation of Intelligence and Precision

The integration of the CAN protocol is key to this instrument's intelligence. It ensures high-speed, reliable data communication between the instrument and modules such as the Battery Management System (BMS), Vehicle Control Unit (VCU), and Motor Controller. This means the displayed SOC data is not a rough estimate but originates from the BMS's precise monitoring and real-time calculation of individual cell voltages, temperatures, and charge/discharge currents within the battery pack, transmitted via CAN bus as accurate signals. The instrument receives and decodes these signals to provide reliable data feedback to the driver.

Despite its compact size, this 12V mini-instrument is strictly built to automotive-grade standards, featuring high reliability and excellent electromagnetic compatibility, enabling stable operation even in complex electrical environments. Its design adheres to Wuling's consistent engineering philosophy of being compact, durable, and cost-effective. Like other core vehicle components, this instrument's design life matches the vehicle's high-standard durability targets.

Installation, Maintenance & Function Expansion

Thanks to its CAN-based architecture, installation and wiring are much simpler than traditional analog instrument systems, requiring only two bus wires to transmit numerous digital signals, reducing wiring complexity, weight, and potential failure points. The instrument also supports fault code display and diagnostic alerts, greatly facilitating vehicle maintenance and repair.

This flexibility makes it suitable not only for passenger electric vehicles but also for light commercial vehicles, logistics vehicles, and fleet operations, where continuous monitoring of battery health and status is crucial for ensuring operational efficiency.

Wuling Hongguang's adoption of standardized protocols like CAN also ensures the monitoring solution's interoperability, scalability, and forward compatibility. The same solution can adapt to an expanding range of vehicle models and support future feature upgrades.

Conclusion

The 12V mini-instrument integrated with SOC display and CAN protocol is a sophisticated and important component within the Wuling Hongguang electric ecosystem. It builds an intuitive bridge between the complex battery system and the end-user, transforming raw data into actionable insights. This reflects Wuling's commitment to simple, reliable, user-centered design, making electric mobility more reassuring and accessible.

In the journey toward sustainable transportation, what matters is not just large batteries and powerful motors but also intelligent yet silent technologies like the 12V mini-instrument behind them, ensuring every trip is informed, safe, and efficient.