Battery Current Collector Multiplexed With PCB Surface Layer
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Solution Overview
Problem
The miniaturization of electronic devices has led to reduced battery volume and frequent charging or replacement, negatively impacting user experience due to limited battery power.
Innovation Solution
A battery design where one electrode current collector is multiplexed as a surface layer of a printed circuit board, reducing volume constraints and increasing power without enlarging the device's size, by using a specific configuration of electrode materials, electrolytes, and current collectors, along with insulating layers and leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the volume of the battery is reduced to make electronic devices smaller, then the portability of electronic devices is improved, but the battery power is limited and charging frequency increases
Solution Approach 1:
The patent merges the battery structure with the PCB by integrating the second electrode current collector with the PCB substrate, making them form an integrated structure. This merging eliminates the need for separate battery housing and PCB assembly, allowing the battery to be designed without volume constraints from traditional packaging, thereby increasing battery power while maintaining device compactness
Solution Approach 2:
The PCB substrate serves dual functions: as the structural support for electronic components and as the second electrode current collector for the battery. This multi-functionality eliminates redundant components and enables the battery to utilize the entire PCB area for energy storage, significantly increasing battery capacity without enlarging the device volume
2Volume of moving object
If the volume of the battery is reduced to make electronic devices smaller, then the portability of electronic devices is improved, but frequent charging or battery replacement is required
Solution Approach 1:
By merging the battery structure with the PCB, the invention creates an integrated power system that maximizes the use of available space within the device. The battery electrodes are directly formed on the PCB substrate, eliminating dead space and enabling continuous expansion of battery capacity, thereby extending battery duration without increasing device volume
Solution Approach 2:
The patent transitions from traditional three-dimensional cylindrical or prismatic battery forms to a two-dimensional planar structure where electrodes are deposited on the PCB surface. This dimensional change allows the battery to utilize the entire surface area of the PCB, significantly increasing energy storage capacity within the same device footprint
3Power
If one electrode current collector is multiplexed as a surface layer of a printed circuit board, then the battery power is increased without enlarging the device volume, but the structural complexity increases
Solution Approach 1:
The PCB substrate performs multiple functions simultaneously: it provides mechanical support for electronic components, serves as the second electrode current collector, and acts as the structural base for the entire battery assembly. This multi-functionality reduces the number of separate components needed, thereby decreasing overall structural complexity despite the innovative integration
Solution Approach 2:
The invention extracts the current collector function from a separate metallic component and integrates it directly into the PCB substrate through copper foil or conductive ink deposition. This extraction and integration eliminates the need for additional current collector layers, adhesives, and housing structures, simplifying the overall battery construction
Data Source
AI summary
A battery, in which an electrolyte (103) is positioned between a first electrode material (102) and a second electrode material (104), the first electrode material (102) is positioned between the first electrode current collector (101) and the electrolyte (103), the second electrode material (104) is positioned between a second electrode current collector (105) and the electrolyte (103), the second electrode current collector (105) is positioned between the second electrode material (104) and a PCB substrate (107), and the PCB substrate (107) is positioned between the second electrode current collector (105) and a PCB surface layer (108). By using one of the electrode current collectors in the battery as one layer of a printed circuit board, limitations on the size of the battery can be reduced without increasing the size of the electronic device in which the battery is situated, thus increasing the battery capacity.