Date: February 19–21, 2025
Venue: Tokyo Big Sight, Japan (3 Chome-11-1 Ariake, Koto City, Tokyo 135-0063)
Booth Number: E54-20
Abstract
As the world accelerates toward electrified transportation, the synergy between rechargeable batteries and EV charging infrastructure becomes critical. The 18th Int’l Rechargeable Battery Expo – BATTERY JAPAN 2025 – is the premier global stage for battery technologies, but the event also increasingly highlights the entire EV ecosystem, including charging equipment. From February 19 to 21, 2025, at Tokyo Big Sight, Shanghai MIDA EV POWER CO., LTD. (Booth E54-20) will present not only its advanced lithium-ion battery systems but also a complete portfolio of AC charging piles, DC fast chargers, and high-efficiency power modules. This article provides a comprehensive overview of the company’s background and its three core product families, demonstrating how MIDA EV delivers turnkey energy solutions for electric vehicles and energy storage.
1. Introduction: BATTERY JAPAN 2025 and the Charging Infrastructure Imperative
BATTERY JAPAN is the world’s leading exhibition for rechargeable batteries, raw materials, manufacturing equipment, and battery management systems. The 2025 edition – the 18th – is expected to host over 1,500 exhibitors and 70,000 visitors from more than 30 countries. While batteries remain the core focus, the rapid growth of electric vehicles (EVs) has made charging technology a recurring theme. Visitors increasingly demand integrated solutions: a battery provider that also supplies smart, reliable, and cost-effective charging stations.
Shanghai MIDA EV POWER CO., LTD. (MIDA EV) has seized this opportunity. Originally a specialist in EV power batteries and stationary storage, the company has expanded into the EV charging equipment market. Today, MIDA EV designs and manufactures AC slow chargers, DC fast chargers, and the modular power units that drive them. At BATTERY JAPAN 2025, the company will unveil its latest charging products alongside its battery systems, offering a one-stop shop for EV fleets, parking facilities, utilities, and home users.
2. Company Profile: Shanghai MIDA EV POWER CO., LTD.
2.1 Founding and Core Business
Founded in 2010 and headquartered in Shanghai’s Zhangjiang High-Tech Park, Shanghai MIDA EV POWER CO., LTD. has grown from a battery pack assembler to an integrated clean energy technology enterprise. The company holds IATF 16949, ISO 9001, and ISO 14001 certifications, with a dedicated R&D center of 60 engineers. Annual production capacity exceeds 2.5 GWh for battery packs and 30,000 units for EV chargers.
MIDA EV’s traditional strengths lie in lithium iron phosphate (LiFePO₄) and NMC battery systems for electric buses, commercial vehicles, golf carts, and residential storage. In 2022, the company established a new division – MIDA Charging – to leverage its power electronics expertise. Today, MIDA offers a full range of AC and DC chargers, from compact home units to high-power public fast chargers, all integrated with the same BMS and cloud platform used for its battery products.
2.2 Strategic Importance of the Japanese Market
Japan presents a unique opportunity. The government’s Green Growth Strategy aims for 100% of new car sales to be electrified by 2035, requiring a massive expansion of public and private charging infrastructure. Yet, many Japanese parking lots, apartment complexes, and small businesses still lack affordable charging solutions. MIDA EV’s value proposition – high quality at competitive prices – directly addresses this gap. Participation at BATTERY JAPAN 2025 marks the company’s official entry into Japan, with plans to obtain PSE certification for all chargers by mid-2025.
3. Product Overview: Three Families at Booth E54-20
1.At booth E54-20, MIDA EV will dedicate four interactive stations:
2.AC Charging Pile Station – live demonstration of a 7 kW and 22 kW home/office charger.
3.DC Fast Charging Pile Station – a 60 kW floor-standing dual-gun charger.
4.Power Module Showcase – cutaway model of a 30 kW liquid-cooled rectifier module.
5.Battery + Charger Integration – a 15 kWh home storage system paired with an AC charger, showing how solar-charged batteries feed EVs.
The following sections describe each product family in detail.
4. AC Charging Piles – Smart, Safe, and Connected
MIDA EV’s AC chargers are designed for residential, workplace, and destination charging. They convert grid AC power to the vehicle’s onboard charger input (typically Type 1, Type 2, or CHAdeMO depending on region). All MIDA AC piles comply with IEC 61851 and SAE J1772 standards.
4.1 MIDA-Home AC 7kW
- Input: Single-phase 220V/230V, 32A max.
- Output: 7 kW (adjustable from 1.4 kW to 7 kW).
- Connector: Type 2 socket or tethered cable (optional, with locking).
- Interface: 4.3-inch color touchscreen, RFID reader, and LED status ring.
- Communication: 4G, Wi-Fi, Bluetooth, and Ethernet (Modbus TCP).
- Protection: Overcurrent, overvoltage, undervoltage, residual current detection (RCD type A + 6 mA DC), surge protection (Type 3).
- Enclosure: IK08 (impact resistance), IP54 (indoor/outdoor).
- Smart Features: Scheduled charging, load balancing (dynamic power allocation), OCPP 1.6J/2.0.1 compliant for remote management.
- Dimensions: 280 × 210 × 95 mm (wall-mounted).
- Warranty: 3 years.
The MIDA-Home 7kW is ideal for Japanese condominiums. It supports V2H (vehicle-to-home) readiness via a firmware update, allowing bidirectional energy flow if the vehicle supports it. A built-in energy meter measures consumption for billing or self-consumption optimization.
4.2 MIDA-Office AC 22kW
- Input: Three-phase 380V/400V, 32A per phase.
- Output: 22 kW.
- Connector: Dual Type 2 sockets (can charge two vehicles sequentially or with power sharing).
- User authentication: RFID, smartphone app, or plug-and-charge (ISO 15118).
- Networked features: Centralized fleet management via MIDA Cloud; real-time monitoring of energy usage, fault alerts, and remote firmware upgrades.
- Load management: Integrated with external current transformers (CTs) to limit total building consumption, preventing grid overload.
- Certifications: CE, CB, and pending PSE for Japan.
This model targets small businesses, hotels, and EV fleet depots. At the booth, MIDA will demonstrate how two vehicles can share the 22 kW total – for example, each receiving 11 kW when both are plugged in.
4.3 Key Innovation – AC Pile with Integrated Battery Buffer
A new concept for the Japanese market: the MIDA-AC/Storage 7kW. This unit combines a 7 kW AC charger with a 2.5 kWh LiFePO₄ buffer battery inside the same housing. The buffer battery stores cheap overnight electricity or rooftop solar power, then discharges to charge the EV even when grid power is limited (e.g., to avoid demand charges). A small LCD shows state of charge of both the buffer and the connected EV.
5. DC Fast Charging Piles – High Power, High Efficiency
DC chargers bypass the vehicle’s onboard charger, delivering direct current directly to the battery. They are essential for public charging, highway service stations, and commercial fleets. MIDA EV offers a modular DC charger platform from 30 kW to 240 kW, all based on standardized power modules.
- 5.1 MIDA-DC 60kW Dual-Gun Fast Charger
- The workhorse of MIDA’s DC lineup – ideal for convenience stores, parking garages, and taxi stands.
- Input: Three-phase 380V (±15%), 50/60 Hz.
- Output voltage range: 150 – 1,000 V DC (compatible with 400V and 800V architectures).
- Max current per gun: 200 A (single gun) / 100 A per gun (both guns active).
- Power sharing: 60 kW total; when one vehicle is connected, it receives full 60 kW; with two vehicles, power splits dynamically (e.g., 40+20 kW or 30+30 kW).
- Connectors: CHAdeMO + CCS2 (Combo 2) for Japan market; CCS1 optional.
- Efficiency: ≥95% at full load.
- User interface: 10.1-inch industrial touchscreen with sunlight-readable display; supports QR code payment, RFID, and mobile app.
- Communication: OCPP 1.6/2.0, 4G, Ethernet. Remote diagnostics and power adjustment.
- Protection: IP54 (indoor/outdoor), IK10; over-temperature, short circuit, ground fault, and surge protection (20 kA).
- Operating temperature: -25°C to +50°C (derating above 45°C).
- Dimensions: 650 × 500 × 1,600 mm (floor standing).
- Optional: Cable management arm, 7-inch advertising screen, and battery energy storage integration.
At BATTERY JAPAN, MIDA EV will demonstrate a real-time charging session using a 60 kW unit powering a Nissan Leaf (via CHAdeMO) and a Tesla (via CCS2) simultaneously, showing dynamic power distribution.
5.2 MIDA-DC 120kW / 180kW / 240kW Ultra-Fast Charger
For highway corridors and high-volume fleet depots, MIDA offers scalable ultra-fast chargers. The 120 kW unit uses four 30 kW power modules; the 240 kW unit uses eight modules, allowing N+1 redundancy.
- Input voltage: 380V ±15%, three-phase.
- Output (240kW model): 150–1,000 V DC, max current 500 A (single gun) or 250 A per gun (dual gun).
- Charging speed: Adds up to 400 km range in 15 minutes for a 400V EV (assuming 150 kW average).
- Efficiency: >96% peak.
- Noise level: <65 dB at 1 meter.
- Cooling: Forced air (standard) or optional liquid cooling for the 240 kW version.
- Safety: Input/output insulation monitoring, emergency stop button, and automatic disconnection upon plug removal.
- Smart features: License plate recognition (via optional camera), load balancing across up to 16 chargers, and integration with MIDA Cloud for fleet billing.
5.3 Off-Grid DC Fast Charger with Battery Storage
A unique product for remote areas or event charging: the MIDA-Solar DC 60kW. It combines a 60 kW DC charger with a 200 kWh LiFePO₄ battery container (20-foot) and 60 kW solar inverter. The system can operate completely off-grid, recharging its battery from solar or grid when available. At the expo, MIDA will present a scale model of this system, targeting Japanese islands and rural resorts.
6. Power Modules – The Heart of DC Chargers
MIDA EV designs and manufactures its own high-frequency switching rectifier modules, giving the company complete control over cost, efficiency, and reliability. These modules are not only used in MIDA’s own DC chargers but are also sold to other EVSE manufacturers as OEM components.
6.1 MIDA-PM 30kW Rectifier Module
- AC input: Three-phase 380V (±20%), 50/60 Hz, power factor >0.99.
- DC output: 150 – 1,000 V adjustable; constant power from 300V to 1,000V.
- Max output current: 100 A (at 300V) / 30 A (at 1,000V) – constant power curve.
- Rated power: 30 kW.
- Efficiency: Peak >96.5% (full load >95%).
- Cooling: Forced air (front-to-back airflow) or liquid-cooled option (for high-density installations).
- Protections: OVP, OCP, OTP, short circuit, reverse polarity (input and output), and built-in AC surge protection (20 kA).
- Communication: CAN bus (standard) or Modbus RTU (optional); hot-swap capable.
- Dimensions (air-cooled): 210 × 450 × 85 mm (1U height).
- MTBF: >100,000 hours (Telcordia SR-332).
- Certifications: CE, UL 2202 (pending).
The module features a digital signal processor (DSP) control with interleaved Vienna rectifier topology, reducing harmonic distortion (<5% THD). It automatically adjusts output voltage to match EV battery requirements, supporting both low-voltage (200–500V) and high-voltage (800V) platforms.
6.2 MIDA-PM 15kW Compact Module
For smaller DC chargers (30 kW, 45 kW) and portable chargers, MIDA offers a 15 kW module with the same voltage range but half the power and smaller footprint: 150 × 350 × 85 mm. Weight is only 5.2 kg. This module is also used in MIDA’s upcoming portable DC charger (20 kg unit with 15 kW output) – a product targeted at roadside assistance and small workshops.
6.3 High-Efficiency Gallium Nitride (GaN) Module – Technology Preview
At BATTERY JAPAN 2025, MIDA EV will give a sneak peek of its next-generation MIDA-PM 40kW GaN module, using gallium nitride transistors. Expected efficiency >98.5% and power density of 50 kW per liter (twice the current density). Commercial availability is planned for 2026. A live demo will show the module running at 40 kW with passive cooling only (no fan), dramatically improving reliability and reducing maintenance.
6.4 Module Integration into Charging Stacks
Visitors to booth E54-20 can see a transparent “charging stack” – a 120 kW DC charger cabinet opened to reveal six 30 kW modules (five active, one redundant). The stack includes a power distribution unit (PDU) and a system controller. MIDA will explain how modules can be replaced in under five minutes (hot-swap) without shutting down the entire charger – a critical feature for high-uptime public charging networks.
7. Software and Cloud Platform: MIDA ChargeNet
All MIDA AC and DC chargers connect to MIDA ChargeNet, the company’s proprietary cloud platform. Key capabilities:
- Remote monitoring: Real-time status (available, charging, fault, offline), energy delivered per session, revenue tracking.
- Dynamic load management: Adjust charging power across multiple chargers to avoid exceeding a site’s main breaker.
- User management: RFID card issuance, mobile app (iOS/Android) for start/stop and payment.
- OCPP gateway: Allows MIDA chargers to integrate with any third-party central system (e.g., e-clearing houses in Japan).
- Predictive maintenance: Algorithms analyze module temperatures, contactor wear, and communication errors to schedule maintenance before failure.
At the exhibition, MIDA will offer a live dashboard showing demo chargers at the booth and a simulated remote site in Shanghai.
8. Combined Solutions: Battery + Charger + Module
MIDA EV’s greatest strength is the seamless integration of its three product families:
- V2G / V2H ready: MIDA AC chargers communicate directly with MIDA home storage batteries. Excess solar power can first fill the home battery, then later charge an EV, or the EV can discharge to the home battery during peak rates.
- DC charger powered by MIDA storage: A 240 kW DC charger paired with a 500 kWh MIDA battery container can operate with a low-power grid connection (e.g., only 100 kW), buffering energy over time to provide fast charging without demand charges.
- Module-level diagnostics: Since MIDA makes its own modules, the BMS data from the battery pack can be correlated with charger performance data to optimize charging algorithms and extend battery life.
At the booth, a live demonstration will show: a 15 kWh MIDA-Home battery (charged by a simulated solar array) feeding a 7 kW AC charger, which in turn charges a small electric scooter battery pack. All data is displayed on a unified dashboard.
9. Market Strategy and Service Support for Japan
MIDA EV understands that Japanese customers demand exceptional reliability and after-sales support. For the Japanese launch, the company has implemented:
- Local certification: All AC/DC chargers and modules will obtain PSE and JARI (Japan Automobile Research Institute) verification by Q2 2025. Samples submitted in January 2025.
- Service hub: A spare parts and repair center in Yokohama, staffed by bilingual engineers. Response time for critical failures: 4 hours (Tokyo area), 24 hours nationwide.
- Training program: Free OCPP and installation training for Japanese distributors and electricians, with certification issued by MIDA.
- Partnerships: MIDA is in final negotiations with two Japanese trading companies to distribute AC chargers to home centers and with a major parking operator for DC chargers.
10. Invitation and Contact Information
Shanghai MIDA EV POWER CO., LTD. warmly invites all battery and EV infrastructure professionals to visit Booth E54-20 at the 18th Int’l Rechargeable Battery Expo. The exhibition runs from 10:00 to 18:00 (last day until 17:00) from February 19–21, 2025, at Tokyo Big Sight.
- At our booth you can:See live charging of an actual EV (a Nissan Sakura) using a 60 kW DC fast charger.
Operate the 30 kW power module and measure its efficiency on a digital meter.
Discuss custom AC pile designs for Japanese apartment buildings.
Receive a technical data package (USB drive) with full specifications, CAD drawings, and OCPP integration guides. - To schedule a private meeting, contact:
- Mr. Kenji Tanaka (Japan Sales Manager) – Email: kenji.tanaka@midapower.com (Japanese/English)
- Ms. Li Wei (International Sales Director) – Email: li.wei@midapower.com (Chinese/English)
- Phone (during exhibition): +81-80-1234-5678
- For media and analyst inquiries, please request a press kit at the registration desk of booth E54-20.
11. Conclusion
The 18th Int’l Rechargeable Battery Expo is more than a battery show – it is a convergence point for the entire EV energy ecosystem. Shanghai MIDA EV POWER CO., LTD. stands at that convergence, offering not only advanced lithium batteries but also the charging infrastructure that makes them useful. With a complete range of AC charging piles for home and office, DC fast charging piles for public and fleet use, and high-efficiency power modules that power them all, MIDA EV delivers integrated, reliable, and cost-effective solutions.
As Japan accelerates toward its 2035 electrification targets, MIDA EV is ready to be a trusted partner – providing hardware, software, and local support. Visit us at Booth E54-20 in Tokyo Big Sight. Together, let’s charge the future.
Post time: Feb-19-2025