Cable-Type Battery Wireless Charging Coil Design
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Solution Overview
Problem
Conventional secondary batteries face challenges in shape adaptability and efficient charging due to their fixed shapes and the need for wired charging, which limits their application in flexible devices and can result in reduced charging efficiency, especially with high current density.
Innovation Solution
A cable-type secondary battery design that allows wireless charging by incorporating a core with a lithium ion electrolyte, an open-structured inner current collector, a separation layer, an outer electrode, and a charging coil with a diode, enabling electromagnetic induction for charging without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional wired charging method is used, then the battery can be charged, but the charging efficiency is reduced due to resistance influence when using high current density
Solution Approach 1:
The patent replaces the mechanical wired charging system with a wireless electromagnetic induction charging system. The charging coil generates an alternating magnetic field that induces current in the battery's inner current collector, eliminating physical contact and associated resistance losses. This substitution of mechanical connection with electromagnetic field interaction directly addresses the charging efficiency problem.
Solution Approach 2:
The patent introduces a charging coil as an intermediary component that mediates the energy transfer from the external power source to the battery. Instead of direct wired contact, the charging coil acts as a magnetic field intermediary, enabling wireless power transfer and avoiding the resistance issues associated with traditional wired connections.
2Adaptability or versatility
If the battery uses a fixed shape structure, then the fabrication process is simplified, but the adaptability to various device shapes is limited
Solution Approach 1:
The patent segments the battery into modular components: an inner current collector, outer current collector, electrolyte, and charging coil. This segmentation allows each component to be independently configured and arranged in flexible cable-like structures, enabling adaptation to various device shapes while maintaining manufacturing feasibility through standardized component assembly.
Solution Approach 2:
The patent creates a dynamic, flexible battery structure that can adapt its shape. The cable-type configuration with flexible current collectors and electrolyte allows the battery to bend and conform to different spatial arrangements, transforming the static fixed-shape battery into a dynamic adaptable energy storage device.
3Quantity of substance
If the battery uses a cable-type structure with large surface area to volume ratio, then the energy storage capacity increases, but the electron flow becomes difficult
Solution Approach 1:
The patent replaces the conventional electron flow through external circuits with a wireless electromagnetic induction system. The charging coil generates an alternating magnetic field that directly induces current within the battery's inner current collector, bypassing the need for external wire connections and improving electron flow efficiency in the cable-type structure.
Solution Approach 2:
The patent implements a nested structure where the inner current collector is surrounded by the electrolyte, which is in turn surrounded by the outer current collector. This nested arrangement allows the battery to maintain a compact cable-type form factor while ensuring efficient electron flow paths through the concentric current collectors, resolving the electron flow difficulty.
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 cable-type battery can be conveniently charged wirelessly, overcoming shape-related charging issues and enhancing mechanical properties through the use of a charging coil as a reinforcement, while maintaining superior capacity and cycle characteristics.
Implementation Method 1
capable of wireless charge, configured to have a horizontal cross section of a predetermined shape and to extend longitudinally and comprising: a core for supplying lithium ions, which comprises an electrolyte; an inner electrode comprising an open-structured inner current collector surrounding the outer surface of the core for supplying lithium ions
Implementation Method 2
the charging coil comprising a diode which electrically connects the inner current collector and the outer current collector therebetween, and the charging coil being electrically connected with the outer current collector at one end thereof and electrically connected with the inner current collector at the other end thereof
Data Source
AI summary
The present invention provides a cable-type secondary battery capable of wireless charge. The cable-type secondary battery according to the present invention can be applied in a wireless charging method, thereby being conveniently charged as compared with conventional batteries which are charged with wires, and has a charging coil configured in a wound form, which can overcome the problem of local charge caused by the shape of conventional cable-type batteries. Also, the charging coil is formed in a packaging to act as a reinforcement material, thereby enhancing the mechanical property of the cable-type secondary battery.