Hybrid Energy Storage Device Integrating Supercapacitor and Battery

Solution Overview

Problem

Conventional energy storage devices combining batteries and supercapacitors have limitations such as high volume and cost due to separate components and differing operating voltages, which restrict their application in high current charge-discharge scenarios.

Innovation Solution

A hybrid energy storage device is designed with a supercapacitor and battery connected in parallel, utilizing a carbon nanotube/polyaniline composite film for the supercapacitor electrodes and carbon nanotube/lead dioxide or zinc manganese composite materials for the battery electrodes, eliminating the need for a voltage control module and allowing for a compact, cost-effective design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional hybrid energy storage device uses separate capacitor and battery components with different operating voltages, then both battery and supercapacitor functionalities are achieved, but the device volume increases and manufacturing cost rises

Engineering Contradiction:

Improvehybrid energy storage functionalityVSAvoiddevice volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent combines the battery and supercapacitor into a single integrated device structure where both energy storage mechanisms coexist within the same housing. The battery component and supercapacitor component are merged into one unified device, eliminating the need for separate components and reducing overall device volume while maintaining hybrid energy storage functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated hybrid energy storage device performs multiple functions within a single structure: it provides both long-term energy storage (battery function) and short-term high-power delivery (supercapacitor function). The device universally handles both low-current sustained discharge and high-current pulse discharge requirements, eliminating the need for separate dedicated components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a conventional hybrid energy storage device uses separate capacitor and battery components with different operating voltages, then both battery and supercapacitor functionalities are achieved, but manufacturing cost increases

Engineering Contradiction:

Improvehybrid energy storage functionalityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines the battery and supercapacitor into a single integrated device structure where both energy storage mechanisms coexist within the same housing. The battery component and supercapacitor component are merged into one unified device, eliminating the need for separate components and reducing overall device volume while maintaining hybrid energy storage functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated hybrid energy storage device performs multiple functions within a single structure: it provides both long-term energy storage (battery function) and short-term high-power delivery (supercapacitor function). The device universally handles both low-current sustained discharge and high-current pulse discharge requirements, eliminating the need for separate dedicated components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Use of energy by moving object

If a rechargeable battery is used alone, then high energy density is achieved, but power density is low and cycle life is short under high current conditions

Engineering Contradiction:

Improveenergy densityVSAvoidpower density

Core Design Contradiction:

Use of energy by moving objectVSPower

Solution Approach 1:

The patent implements a dynamic current distribution mechanism where the device automatically adjusts between battery and supercapacitor based on discharge requirements. During high-current pulse discharge, the supercapacitor component dynamically provides the high power surge while the battery maintains sustained energy supply. This dynamic switching optimizes both power density and energy density utilization without manual intervention.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The hybrid device self-regulates the contribution of each component based on real-time power demands. The control system automatically determines when to draw from the supercapacitor for high-power needs and when to rely on the battery for sustained energy delivery, eliminating the need for external control systems while optimizing performance.

Inventive Principle:

Principle #25Self-service

4Use of energy by moving object

If a rechargeable battery is used alone, then high energy density is achieved, but cycle stability is poor under high current charge-discharge

Engineering Contradiction:

Improveenergy densityVSAvoidcycle stability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent implements a dynamic current distribution mechanism where the device automatically adjusts between battery and supercapacitor based on discharge requirements. During high-current pulse discharge, the supercapacitor component dynamically provides the high power surge while the battery maintains sustained energy supply. This dynamic switching optimizes both power density and energy density utilization without manual intervention.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The hybrid device self-regulates the contribution of each component based on real-time power demands. The control system automatically determines when to draw from the supercapacitor for high-power needs and when to rely on the battery for sustained energy delivery, eliminating the need for external control systems while optimizing performance.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The hybrid device achieves improved power density, cycle stability, and flexibility, reducing charging and discharging currents, thereby extending battery life and enhancing overall performance and utilization, while minimizing volume and manufacturing costs.

Implementation Method 1

supercapacitor can provide higher power density

Methodology Applied

Scientific EffectElectrochemical reactions: Redox Reactions

Data Source

PatentUS9576747B2Hybrid energy storage device

Publication Date: 2017.02.21 HON HAI PRECISION INDUSTRY CO LTD

AI summary

A hybrid energy storage device includes a positive pole including a supercapacitor first electrode and a battery positive electrode located in a same plane and contacts with each other, a negative pole including a supercapacitor second electrode and a battery negative electrode located in a same plane and contacts with each other, and a separator located between the positive pole and the negative pole. The supercapacitor second electrode, the battery negative electrode, the supercapacitor first electrode, the battery positive electrode, and the separator are planar structures. The supercapacitor first electrode, the supercapacitor second electrode, the battery positive electrode, the battery negative electrode, the separator and electrolyte are packaged in a shell.