NGI Bidirectional DC Supply: Top 3 Portable Energy Leaders' Choice, Redefines Testing Efficiency

As global energy transition accelerates and green mobility demand surges, portable energy storage has become vital for outdoor activities and emergency backup. According to the China Chemical and Physical Power Supply Industry Association, the global market is projected to reach ¥88.2 billion by 2026, with China's output exceeding ¥70 billion.

Now, let's explore how NGI's high-performance bidirectional programmable DC power supply drives innovation for a top-tier global portable energy storage brand.

Customer Background

Customer A stands as a global Top 3 portable energy storage enterprise, specializing in portable power and residential green energy systems. With an integrated M2C model spanning R&D, manufacturing, and direct sales, their products reach 30+ countries and regions, commanding a global market share of ≥10%.

Testing Requirements

Portable energy storage devices demand comprehensive functional verification of core components: bidirectional boost DC-DC converters, bidirectional inverters, and DC fast-charging output modules. For their latest product development, our customer required an advanced R&D testing solution. Traditional testing approaches comprised:

High-current DC Power Supply + DC Electronic Load

Portable power station battery packs typically operate below 60V, with up to 16 series cells, commonly using NCM or LFP batteries. Current levels are usually controlled within 350A, and charging/discharging directions must switch freely.

High-voltage DC Power Supply + DC Electronic Load

When testing bidirectional DC/DC modules and bidirectional inverter modules, functional and performance testing of these modules must be completed. During R&D testing, a high-voltage bidirectional DC power supply is also required. This supply must simulate high-voltage loads and enable seamless switching between high-voltage DC power sources, with voltage controlled within 700V and power around 12kW.

Traditional testing solutions rely on multiple devices connected in parallel, which has problems such as complex wiring, high energy consumption, and difficulty in data synchronization. Especially when verifying key indicators such as battery charging and discharging performance and inverter efficiency, the testing efficiency is low, which affects product launch and customer operations.

NGI Bidirectional Programmable Power Supplies

Boost R&D Testing for Portable Energy Storage Devices

To address the customer’s testing challenges, after technical discussions, product trials, and reliability validation, NGI provided the N35500 Series and N35100 Series bidirectional programmable DC power supplies—perfectly suited for both R&D and production line testing.

Battery Simulation for Higher Efficiency

With the NS81000 Battery Simulation Software, the system can accurately simulate various battery characteristic curves, meeting simulation needs for different batterytypes and greatly improving testing efficiency.

Integrated Source & Load for Simplified Testing

Compared with conventional setups using separate power supplies and loads for forward/reverse current switching, NGI’s bidirectional power supplies achievehigh-speed, seamless transitions between source and load modes. This prevents voltage or current overshoot without requiring any instrument change—making testing easier and safer.

High Power Density, Multiple Options

Compact size with high power density—7500W integrated into a 1U chassis—delivers over 50% space savings compared to traditional test power supplies, effectively optimizing customer testing areas.

After adopting NGI bidirectional DC power supplies, customers experience significantly reduced single-cycle test times while lowering procurement costs. This technology is emerging as a key driver for accelerating product iterations in portable energy storage devices and seizing market opportunities.

N35500 Series 750V Model Specifications:

N35100 Series 80V Model Specifications:

In addition, NGI can also provide high-performance cell simulators, simulated fast-charging electronic loads, and other products that can be used for testing battery protection boards, fast-charging ports, and other components of portable energy storage products.