Proposal Mobile Power Hub Retired EV Battery Apr

Proposal: Mobile Power Hub (Retired EV Battery) Apr 2020

Mobile Power Hub • Supply AC power cater for various clients’ end applications • Match up different total energy capacity by using scalable number of portable battery modules • Can use external power supply (e. g. diesel generator) to recharge portable battery modules seamlessly when they are discharging to end applications • Battery Management System detect automatically number of battery blocks in use • LCD HMI showing battery status and total power So. C

Portable Battery block • • Target to Nissan LEAF retired battery modules Capacity : ~65 Ah Power : ~2 Kwh Max Output Current : 70 A Plug-n-play to Main Power System Unit Mature Amphenol power plug with >1000 mating cycles Light indicator showing battery power level Internal battery management system monitors So. C, charge, discharge, temperature safety criteria with cut-off features

EV Battery Structure Suggest to use Nissan Leaf EV battery module. Battery Module Specification Battery module appearance Internal battery cell connection Capacity (Ah) 65 Max Voltage (V) 8. 5 Min Voltage (V) 5 Nominal Voltage (V) 7. 6 Weight (kg) 3. 8 Total no. per pack 48 modules

Portable Battery Block Design ( by using EV Battery Module) DC+/- to On. Board Charger DC+/- to Main Power System Unit Cell 7 Module 2 Cell 6 Temp. Sensor 0 Temp. Sensor 1 Temp. Sensor 2 Temp. Sensor 3 Temp. Sensor 4 Module 3 SPI Digital Communication MCU CAN signal to Main Power System Unit Cell 5 Cell 4 Cell 3 Module 1 Cell 2 Cell 1 BMS Cell 0 Module 0 To: GND

Portable Battery Block - Main Components 1. Battery management system (BMS) - voltage, temperature, and State-of-charge (So. C) monitoring 2. Cooling fan - heat dissipation by air 3. Battery cells - retired EV battery modules 4. LED indicator light - battery low voltage indication

Mobile Power Hub - System Block Diagram System Info: - The battery block is connected in Parallel - The battery block is detachable - This system support 1 to 6 battery blocks Main Power System Unit System Control (HMI) AC input On-Board charger ~3 kw DC/AC Inverter ~3 kw AC output PDU & BMS Battery Block #1 Battery Block #4 Battery Block #2 Battery Block #5 Battery Block #3 Battery Block #6

Mobile Power Hub - Main Components 1. On-board charger - input : 220 Vac, 13 A - output : DC 20~30 V - Power : ~3 kw 2. DC-AC inverter - input : DC 21~30 V - output : 220 Vac, 13 A - Power : ~3 kw 3. Power Distribution Unit (PDU) -detect number of battery blocks in use automatically 4. HMI (Monitor) - system control unit with touch screen function 5. E-Stop - for emergency purpose

Applications of Mobile Power Hub (Light to medium duty ) No. of battery block Power (kwh) 5 pieces of 100 W outdoor LED ( luminous 9500 lm) Power Consumption = 500 W 2. 5 horsepower airconditioner(300 sqfeet area) Power. Consumption=1900 W Operating Time 2 ~3. 5 ~6. 4 hr 1. 68 hr 4 ~6. 5 12. 8 hr 3. 36 hr 6 ~10 19. 2 hr 5. 05 hr

Experience in Mobile chargers development • HKPC, the 1 st Retired batteries Mobile charger prototype • HKPC, the 2 nd Mobile charger prototype

Hong Kong Productivity Council 香港生產力促進局 HKPC Building, 78 Tat Chee Avenue, Kowloon, Hong Kong 香港九龍達之路 78號生產力大樓 +852 2788 5678 www. hkpc. org