Solid-State Battery Mounting on Flexible PCB for Miniature Implants
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Solution Overview
Problem
Implantable medical devices, particularly those implanted directly into a patient's vessel, face challenges in miniaturization and assembly complexity due to the large size and separate integration of energy storage devices like batteries, which increase production costs and complexity.
Innovation Solution
The integration of a solid-state battery on a flexible circuit board structure with electronic components, allowing for a compact assembly and eliminating the need for additional electrical connections, facilitated by using the same mounting technology for both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a separate battery is used as the energy storage device, then the device can provide sufficient electrical energy, but the device size increases and assembly complexity increases
Solution Approach 1:
The patent combines the energy storage device (battery) with the circuit board structure into a single integrated unit. The battery is mounted directly on the circuit board, eliminating the need for a separate battery housing and dedicated mounting space, thereby reducing overall device volume while maintaining sufficient electrical energy provision.
Solution Approach 2:
The circuit board structure serves dual functions: as the electronic circuit carrier and as the mounting platform for the energy storage device. This multi-functional design eliminates the need for separate structural components, reducing device size and simplifying the overall architecture.
2Use of energy by moving object
If a separate battery is used as the energy storage device, then the device can provide sufficient electrical energy, but the assembly complexity and production costs increase
Solution Approach 1:
The battery and electronic module are merged into a single assembly where the battery is mounted directly on the circuit board. This eliminates the need for separate electrical connections and mounting procedures, reducing assembly complexity and production costs while maintaining full electrical energy provision capability.
Solution Approach 2:
The circuit board structure itself serves as the mounting platform for the battery, eliminating the need for additional structural support components. The battery leverages the existing circuit board infrastructure, reducing the number of assembly steps and components required.
3Volume of moving object
If a solid-state battery is integrated on the circuit board, then the device size is reduced and assembly is simplified, but the energy storage capacity may be limited
Solution Approach 1:
The patent specifies that the solid-state battery should have a capacity of at least 0.5 mWh, establishing a minimum energy storage parameter. This parameter change allows the battery to be miniaturized for integration on the circuit board while maintaining sufficient energy storage capacity for implantable medical device operation.
Data Source
AI summary
An implantable medical device comprises a housing, a circuit board structure arranged within in the housing and comprising at least one flexible section, an electronic module comprising at least one electronic component arranged on the circuit board structure, and an energy storage device for providing electrical energy for operation of the implantable medical device. The energy storage device is a solid-state battery mounted on the circuit board structure. An energy generation device connected to the energy storage device is a secondary cell, wherein the energy generation device is configured to convert patient energy to electrical energy for charging the energy storage device.