Smart Ring Test Breakthrough! NGI Battery Simulator Empowers Wearable Leaders

The Hidden "Precision War" Behind Smart Rings

Smart rings are taking the world by storm, but behind their sleek designs and powerful features lies a hidden battle: battery protection board testing. This directly impacts device battery life, safety, and user experience. For manufacturers, precise and efficient testing is the critical technical imperative.

In this article, we share how NGI high-performance battery simulators are applied by Customer A, a global top-tier wearable device brand.

Accuracy, Density, Scalability: Three Critical Testing Constraints

Customer A is a leading global provider of smart ring products and solutions, whose devices continue to set industry benchmarks in battery endurance and health monitoring performance. During early-stage development, the customer needed to perform panelized testing of smart ring battery protection boards. Test items included:

Single-cell voltage acquisition accuracy

Standby power consumption testing

Overcharge and over-discharge protection

These tests directly affect key performance indicators such as battery life and operational safety. However, the customer faced multiple challenges related to test accuracy, system integration, and scalability.

Insufficient Single-Cell Voltage Simulation Accuracy

Traditional SMU (Source Measure Unit) cards typically offer voltage accuracy of only 0.1% + 5 mV. At a nominal operating voltage of 3.7 V, this results in a maximum error of up to 8.7 mV, which fails to meet the high-precision voltage and battery-state monitoring requirements of premium wearable devices.

Low Channel Density

To save test space and improve efficiency, the customer required multi-panel parallel testing of battery protection boards. Conventional high-precision benchtop power supplies are usually 1/2 width, 2U in height. For a 12-panel configuration, power supplies alone occupy 6U of rack space, making it difficult to support dozens of parallel test channels in a high-density production environment.

Limited Scalability

Body temperature monitoring is becoming a key trend in wearable devices, requiring additional high-precision resistance simulation. This places higher demands on test system scalability, rack space utilization, and ease of transportation and wiring.

High Accuracy, High Integration, Modular Design

NGI Redefines Testing Standards

After multiple rounds of technical discussions and product evaluations, Customer A adopted the NGI N9000 Series high-performance modular battery simulator solution, achieving significant improvements in both test accuracy and efficiency.

Extreme Precision: 0.1 mV / 1 μA Accuracy Ensures Reliable Testing

Supports voltage accuracy as high as 0.1 mV, far exceeding previous solutions. This provides “microscope-level” simulation signals for voltage sensing circuits, ensuring accurate and reliable test results.

Offers 1 μA-level current measurement accuracy for standby current testing, enabling precise capture of microamp-level current fluctuations during device sleep modes and providing reliable data to optimize battery life.

High-Density Modular Design Reshapes Testing Efficiency

A compact 4U chassis integrates up to 36 channels, saving over 75% of rack space compared to traditional precision power supply solutions with the same channel count, enabling high-density test station deployment.

The chassis innovatively supports plug-in resistance modules, allowing flexible and accurate simulation of NTC thermistor resistance values across different temperatures. This enables one-stop temperature sensing accuracy testing with simplified wiring and operation.

Seamless Integration for Automated Testing

Standard LAN and CAN communication interfaces are provided as default.

Supports multiple standardized protocols including SCPI, Modbus RTU, and CANopen, facilitating seamless integration into automated test systems and significantly improving overall test efficiency.

Empowering Precision Manufacturing for Smart Wearables

As smart wearable devices continue to evolve toward higher precision and performance, battery protection board testing is no longer a basic validation task—it has become a critical safeguard for core competitiveness and user safety. By pursuing ultimate testing accuracy and enabling precision manufacturing, NGI high-performance battery simulators will continue to drive innovation and advancement across the high-end smart wearable industry.