Case Studies

Lithium Titanate Power Bank

  • 3000 mAh Power Bank
  • High Current, Super Fast Charging
  • Charging Current - 20A, Full Charge in under 10 Mins.
  • Inbuilt Safety Features, OLED Display
  • Firmware Development
  • Enclosure Design

Project Summary:

The project requirement is to design a power bank using Lithium Titanate battery with super-fast charging characteristics. The design is based on a High power current source and monitoring system using a PIC Microcontroller.

The lithium-Titanate battery is a type of rechargeable battery which has the advantage of being faster to charge than other lithium-ion batteries. It uses lithium-Titanate nanocrystals, instead of carbon, on the surface of its anode. This gives the anode a surface area of about 100 square meters per gram, compared with 3 square meters per gram for carbon, allowing electrons to enter and leave the anode quickly. This makes fast recharging possible and provides high currents when needed.

The power bank designed by Qmax has fast charging capability which charges the battery in less than 10 mins. The power bank can also be charged using conventional mobile phone charges using Micro USB. The device has built in safety features which prevent over charging and deep discharge of the battery.

Important Parts:

  • Analog Devices High power current source
  • Microchip 8 bit Microcontroller
  • Electronics Assembly OLED display 96 x 16 dots
  • Richtek Boost regulator
  • Texas Instruments 10-A Fully-Integrated Synchronous Boost Converter
  • Texas Instrument Current Sense Amplifier
  • Texas Instrument Buck Switching Regulator

Salient Features:

  • High Current, Super-Fast charging
  • Inherently safe Design
  • 3000 mAh Capacity
  • Normal and Fast charge Modes
  • OLED for Status display

Qmax Scope of work:

  • Hardware Design
  • Schematics Entry
  • PCB Layout Design
  • PCB Fabrication and Assembly
  • Firmware development
  • Board Bring-up and testing
  • Enclosure Design