Sheet Power Supply Control Module for Coin Cell Keys
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Solution Overview
Problem
Existing power supply control modules for small electronic devices like vehicle electronic keys face challenges in precise timing of power saving and lack of practicality due to size constraints when using coin cells, leading to difficulties in applying such structures effectively.
Innovation Solution
A power supply control module is designed with a sheet-shaped configuration, including a first sheet portion connected to the coin cell's first pole, a second sheet portion connected to its second pole, an insulating layer, a wireless communication unit, a switch unit, and a controller, allowing external control of power supply and secure communication with external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a coin cell is used as power source in electronic key, then the device size is reduced, but the capacity decreases and power control becomes difficult
Solution Approach 1:
The power control function is segmented into separate controllable components: a switch unit that can independently control power supply to different circuits, and a controller that manages the switching based on operational states. This allows the small coin cell to be efficiently managed despite its limited capacity.
Solution Approach 2:
The power supply system is made dynamic through the switch unit that can change between connected and disconnected states, and the controller that adjusts power distribution based on real-time operational needs. This dynamic control optimizes the use of limited battery capacity in the small coin cell.
2Loss of energy
If power saving function is added to electronic key, then energy consumption is reduced, but the timing control precision is insufficient
Solution Approach 1:
The controller receives feedback from operational states (such as communication status, button presses, or sensor inputs) and adjusts the switch unit accordingly to achieve precise timing control. This feedback mechanism ensures power is saved at the exact intended moments while maintaining operational precision.
Solution Approach 2:
The controller is configured to anticipate power-saving opportunities by monitoring system states and activating the switch unit in advance of actual power consumption events. This preliminary action ensures precise timing control while maximizing energy savings.
3Adaptability or versatility
If wireless communication unit is integrated near coin cell, then communication function is enabled, but space for power control components is reduced
Solution Approach 1:
The switch unit and controller are integrated into a compact power supply control module that is positioned in close proximity to the wireless communication unit and coin cell. This merging of components maximizes the use of limited space while maintaining all necessary functions.
Solution Approach 2:
The power supply control module is designed with a nested structure where the switch unit and controller are housed within a compact form factor that fits alongside the coin cell and wireless communication unit. This nested arrangement optimizes space utilization in the electronic key.
4Reliability
If insulating layer covers entire first pole, then electrical insulation is improved, but the first sheet portion cannot extend beyond first surface
Solution Approach 1:
The insulating layer is applied with varying coverage: it completely covers the first pole area to ensure maximum electrical insulation where needed most, while the first sheet portion extends beyond the first surface in non-critical areas where electrical insulation requirements are lower. This local quality approach optimizes both insulation and functionality.
Data Source
AI summary
A power supply control module includes a first sheet portion, a second sheet portion, a wireless communication unit, a switch unit and a controller. The controller configured to cause the switch unit to switch between a closed state and an opened state based on the result of communication performed by the wireless communication unit, the closed state being a state in which a first cell side electrode layer and a terminal side electrode layer are electrically connected to each other and the opened state being a state in which the first cell side electrode layer and the terminal side electrode layer are electrically disconnected from each other.