Description:FIELD OF INVENTION
The present invention relates to portable energy storage systems. Specifically, the present invention relates to power bank using lithium titanate (LTO) batteries. More particularly, the present invention relates to Power Bank with Programmable Power Delivery and Lithium Titanate Energy Storage.

BACKGROUND
Traditional lithium-ion power banks degrade quickly with frequent use, provide limited fast-charging flexibility, and are prone to thermal issues. Most commercial power banks lack programmability and do not support dynamic charge/discharge profiles or battery life extension. Moreover, USB-C Power Delivery systems are often implemented without intelligent coordination between firmware and hardware.
A known patent US10498274B2 describes a multi-port charging system with battery status indication but does not disclose integration of LTO chemistry with programmable USB Power Delivery (PD) and real-time active balancing using a smart Battery Management System (BMS). Therefore, there is a need for a rugged, intelligent power bank system integrating programmable USB-PD, thermal control, and a long-life LTO battery configuration.
The present invention solves the above problem by offering a smart power bank built on LTO chemistry with active protection and power optimization through microcontroller logic and advanced circuitry.

OBJECT OF THE INVENTION
The main object of the present invention is to provide power bank with programmable power delivery and lithium titanate energy storage.
It is one object of the present invention, wherein the power bank comprises dual output ports (USB-C PD and USB-A QC) controlled via firmware logic., and an advanced battery management system (BMS) for rapid charging, extended cycle life, and improved safety.
It is one object of the present invention, wherein the said power bank provides a combination of a high-endurance battery system with advanced programmable control and safety features.
It is another object of the present invention, wherein a smart BMS enables active cell balancing and thermal protection.
It is one another object of the present invention, wherein dual output ports (USB-C PD and USB-A QC) controlled via firmware logic.
It is yet another object of the present invention, wherein the said power bank utilize the STUSB4500 controller to dynamically negotiate USB power delivery voltages.
It is one object of the present invention, wherein the said power bank uses a BQ25792 IC for charge control and power path management.
It is one object of the present invention, wherein utilizes microcontroller to coordinate charging, discharging, safety logic, and display functions.
It is one object of the present invention, wherein the said power bank system is safe, efficient, compact, and long-lasting, suitable for both consumer and industrial use.

SUMMARY
The main aspect of the present invention is to provide power bank with programmable power delivery and lithium titanate energy storage characterized in that lithium titanate battery pack connected to microcontroller, the said microcontroller is further connected to power delivery controller, PLOC converter and BLPCV converter, the said PLOC converter is connected to battery charging IC at one end and USB A and C output at another end, the display is connected to the BLPCV converter and the PLOC converter is further connected to boost converter.
It is one aspect of the present invention, wherein the said power bank further comprises a battery management system that is integrated with a thermal sensor for safety management and cell longevity;
It is one aspect of the present invention, wherein the said power bank further comprise ventilation slots and thermal pathways for passive cooling during high current discharge operations;
It is one aspect of the present invention, wherein the microcontroller firmware includes fault handling routines to trigger shutdown or throttle operations based on overheat or overload conditions;
It is one aspect of the present invention, wherein the USB Power Delivery is connected to an integrated circuit, enabling programmable voltage profiles for both input and output operations; and
It is one aspect of the present invention, wherein the charging of the battery cells are controlled by another integrated circuit supporting programmable charging rates, battery detection, and I2C communication with the microcontroller.
It is one aspect of the present invention, wherein a boost converter to elevate the battery voltage to 5V for output supply through USB interfaces.
It is one aspect of the present invention, wherein the microcontroller monitors the battery parameters, controls input/output logic, displays status indicators, and communicates with power and charging ICs over I2C.
It is one aspect of the present invention, wherein the output comprises a USB-A port with Quick Charge 3.0 support and a USB-C port supporting Power Delivery up to 12V.
It is one aspect of the present invention, wherein all components are mechanically arranged to ensure compact enclosure with separate power and signal routing to reduce EMI.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 illustrates the block diagram of the connections of components in the power bank, according to the present invention.
Figure 2 illustrates the schematic diagram of circuit displaying electrical interconnection of the power bank, according to the present invention.

DETAILED DESCRIPTION OF INVENTION WITH REFERENCE TO ACCOMPANYING DRAWINGS
With reference to the figures 1 and 2, the present invention comprises Lithium Titanate battery pack connected to microcontroller. The said microcontroller is further connected to power delivery controller, PLOC converter and BLPCV converter. The said PLOC converter is connected to battery charging IC at one end and USB A and C output at another end. The display output is given to BLPCV converter. The PLOC converter is further connected to boost converter.
Specification of components of the present invention
LTO Battery Pack (1S4P): Four cylindrical 2.4V LTO cells (Model 23680, 2.4V each) connected in parallel to provide high durability, ultra-fast charge, and long cycle life. The cells are placed on the rear side of the PCB with thermal sensors for precise temperature tracking.
Battery Management System (JBD-HP01S001): Monitors cell balancing, temperature, overcharge, and short-circuit protection. It is thermally linked to the microcontroller for safety shutdowns.
Power Management ICs
• STUSB4500 (PD Controller): Manages dynamic power negotiation over USB-C input/output, with programmable voltage profiles (e.g., 5V, 9V, 12V). It controls input/output power negotiation via USB PD protocol. It enables the system to dynamically request or provide voltages from 5V to 12V.
• BQ25792 (Battery Charging IC): Supports programmable charging logic, thermal monitoring, and power path switching. Interfaces with the MCU via I2C. It controls charging with thermal monitoring, programmable charging current, and dynamic power path control.
• TPS61088 (Boost Converter): Converts battery voltage to 5V for output.
Microcontroller Control : STM32 Microcontroller: Governs logic control, monitors thermal and power signals, communicates with STUSB4500 and BQ25792, updates display, and executes safety protocols. Displaying charge/discharge state on a digital screen. It monitors battery voltage, current, and temperature via I2C communication. Managing current limits and initiating protective shutdowns in case of faults.
Output Interfaces: USB-A (QC 3.0) and USB-C (PD), routed through appropriate control
ICs. USB-A port provides QC 3.0 output.USB-C port supports PD output and charging input. PD voltage profiles and limits are programmed via STUSB4500 registers
Display/Indicators: LED/LCD shows battery level, temperature warnings, and status.
Firmware Logic initializes and configures PD and charger ICs, monitors battery voltage and temperature, executes charging logic, displays status and shuts down system in case of fault.
Battery management system: The smart BMS with active balancing ensures all LTO cells are maintained uniformly. Overcharge, overdischarge, thermal faults, and short circuits are monitored continuously.
Mechanical and PCB Layout: PCB dimension: 12.5 cm × 8 cm, 2-layer FR4 with HASL/ENIG finish, Heat dissipation achieved using ventilation slots and copper traces, Enclosure designed with 0.5 cm clearance on all sides, mounting holes provided for casing and module fixation.
Working of the invention:
• Fast Recharge in 10-15 Minutes: A delivery person plugs the power bank in during a coffee break. The LTO battery rapidly charges to 80% in ~10 minutes due to high C-rate tolerance.
• Extreme Weather Use: A trekker in the Himalayas uses the Neon Power Bank in sub-zero conditions. Traditional Li-ion cells degrade in cold, but LTO cells perform reliably even at -30°C.
• Extended Lifespan: A heavy smartphone user uses the power bank every day. Unlike typical banks that last ~500 cycles, Neon delivers over 5000 charge cycles, lasting years longer.

Advantages:
A. Technical Edge
• 10x Lifespan: >5000 charge cycles compared to 300–500 of Li-ion.
• 10–15 Min Recharge: Drastically faster than standard power banks.
• High Safety: Non-flammable, thermally stable at high and low temperatures.
• Low Self-Discharge: LTO retains charge better over time.
B. Market Differentiation
• First-in-India: LTO-based smart power bank.
• Premium durability positioning: Ideal for logistics, field operations, defense, and premium tech users.
• Dual Output + Smart Display: USB PD + QC3.0 with live battery stats.
C. Revenue Model Fit
• Targeting 1 million units @ ₹2,500 = ₹250 crore topline.
• Long life and premium features justify higher price → 50% gross margins possible.
• Great fit for offline channels where feature demos influence purchase. , Claims:WE CLAIM
1. Power bank with programmable power delivery and lithium titanate energy storage characterized in that:
a. a lithium titanate battery pack configured in a parallel cell arrangement;

b. a microcontroller operatively connected to:
a USB power delivery controller, a battery charging integrated circuit (IC),
a boost converter, and a display interface;
c. a battery management system comprising active cell balancing and an integrated thermal sensor;
d. at least one USB-C port configured for programmable power delivery and at least one USB-A port supporting quick charge;

e. firmware configured to monitor battery parameters, control charging and discharging logic, implement safety shutdowns, and dynamically adjust output profiles.
Wherein the said battery management system is integrated with a thermal sensor for safety management and cell longevity;
wherein the said power bank further comprises ventilation slots and thermal pathways for passive cooling during high current discharge operations;
wherein the USB Power Delivery is connected to an integrated circuit, enabling programmable voltage profiles for both input and output operations; and
wherein the charging of the battery cells are controlled by another integrated circuit supporting programmable charging rates, battery detection, and I2C communication with the microcontroller.
2. Power bank as claimed in claim 1, wherein the said microcontroller monitors the battery parameters, controls input or output logic, displays status indicators, and communicates with power and charging ICs over I2C.
3. Power bank as claimed in claim 1, wherein the USB Power Delivery controller is a configured to negotiate input and output voltages dynamically between 5V and 12V.
4. Power bank as claimed in claim 1, wherein all components are mechanically arranged to ensure compact enclosure with separate power and signal routing to reduce EMI.
5. Power bank as claimed in claim 1, wherein the microcontroller firmware includes fault handling routines to trigger shutdown or throttle operations based on overheat or overload conditions.