Wireless Solid-State Battery Module With External Charging Coil
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Solution Overview
Problem
Existing non-contact charging type secondary batteries, such as those described in Japanese Patent No. 5798407, are difficult to downsize and integrate into small devices like wearable technology due to the challenge of achieving both waterproofness and efficient wireless charging, as barrier layers that ensure waterproofness interfere with electromagnetic or magnetic field coupling.
Innovation Solution
A wireless rechargeable solid-state battery module with a power receiving coil positioned outside a barrier layer that isolates the battery from the environment, using a conductor-containing barrier layer to shield against moisture and dust while allowing wireless charging, and integrating the battery with an internal circuit to reduce size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier layer is formed to secure high waterproofness, then waterproofness is improved, but electromagnetic field coupling or magnetic field coupling is blocked
Solution Approach 1:
The patent divides the battery structure into two distinct zones: an inner region containing the solid-state battery protected by a barrier layer for waterproofness, and an outer region containing the power receiving coil exposed to the external environment for wireless charging. This spatial segmentation allows each component to optimize its function without interference from the other.
Solution Approach 2:
The power receiving coil is extracted from the barrier layer structure and positioned in the external environment outside the barrier layer. This extraction allows the coil to maintain direct electromagnetic field coupling with the external power transmission system while the barrier layer independently provides waterproof protection for the battery.
2Reliability
If the battery is protected from environmental factors, then reliability is improved, but device size reduction is limited
Solution Approach 1:
The battery module is segmented into a protected inner core (solid-state battery with barrier layer) and an outer functional layer (power receiving coil). This segmentation allows the protected battery to be compact while the outer coil can be optimized for wireless charging efficiency, achieving both small size and reliable protection.
3Productivity
If power receiving coil is placed outside barrier layer, then wireless charging efficiency is improved, but battery exposure to environment increases
Solution Approach 1:
The power receiving coil is extracted from the protected battery structure and positioned in the external environment. This extraction places the coil in optimal position for electromagnetic field coupling with external power transmission systems, maximizing wireless charging efficiency while the barrier layer continues to protect the battery from environmental factors.
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 solution enables a compact, waterproof, and efficient wireless charging system that protects the battery from environmental factors, reduces power loss, and enhances the efficiency of the electronic circuit board by eliminating the need for charging circuits on the board.
Implementation Method 1
a power receiving terminal that is electrically connected with an external circuit, which includes a power receiving coil coupled with an external electromagnetic or magnetic field
Implementation Method 2
it is required to secure a coupling degree of electromagnetic field coupling or magnetic field coupling between a power transmission coil and a power receiving coil
Implementation Method 3
a barrier layer that entirely or partially contains a conductor and isolates the solid-state battery and the internal structure from an outside air environment
Data Source
AI summary
A wireless rechargeable solid-state battery module includes a solid-state battery; an internal structure including an internal circuit electrically connected with the battery; positive and negative electrode terminals, each of which is electrically connected with the solid-state battery, is exposed on an outer surface, and is where the positive or negative electrode terminal can be mounted on an electronic circuit board; barrier layers that entirely or partially contain a conductor and isolate the battery and the internal structure from an outside air environment; and a power receiving terminal electrically connected with an external circuit, which includes a power receiving coil coupled with an external electromagnetic or magnetic field, is electrically connected with the internal circuit, and is in an outside of the barrier layers. The power receiving coil converts the external electromagnetic or magnetic field into electrical energy and supplies current to the internal circuit via the power receiving terminal.