Power Receiving Module Storage Mode Control
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Solution Overview
Problem
In small set devices like hearing aids, where the secondary battery is unexchangeable, existing methods to reduce power consumption during storage are ineffective due to continuous power supply to protection circuits, limiting the allowable storage period.
Innovation Solution
A non-contact charging system with a power receiving module that includes a switching control section to shut off power to all supply portions, including the protection circuit, in a storage mode, and switches to a use mode upon loading, reducing power consumption without increasing system complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply to the protection circuit is maintained during storage, then the battery can provide protection functions, but power consumption increases and storage period is limited
Solution Approach 1:
The patent applies the dynamics principle by making the power supply state changeable between storage mode and use mode. The switching control section dynamically adjusts the power supply state based on the operational status of the set device, allowing the protection circuit to be powered off during storage and powered on during use, thus resolving the contradiction between maintaining protection function and reducing power consumption.
2Use of energy by moving object
If power supply to all power supply portions is shut off during storage, then power consumption is reduced, but the protection circuit cannot perform protection functions
Solution Approach 1:
The system dynamically switches between storage mode and use mode based on operational status. During storage mode, power is shut off to reduce consumption while the device remains in a safe state. When the set device is used, the switching control section activates power supply to enable protection functions, thus resolving the contradiction between power reduction and protection capability.
Solution Approach 2:
The switching control section is pre-configured to automatically activate power supply when the set device transitions to use mode, ensuring protection functions are ready before actual operation begins. This preliminary action ensures that protection is available exactly when needed without manual intervention.
3Device complexity
If the secondary battery is built in an unexchangeable state, then device structure is simplified, but existing power consumption reduction methods cannot be employed
Solution Approach 1:
The patent applies dynamics by implementing a switching control section that can change the power supply state based on operational mode. Since the battery is built-in and unexchangeable, the system compensates by dynamically controlling power distribution to different circuits, allowing the protection circuit to be powered off during storage while maintaining the simplified built-in battery structure.
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
This configuration allows for long-term storage with minimized power consumption by the protection circuit, enabling extended storage periods without cumbersome operation changes.
Implementation Method 1
Electric power is transmitted from the power transmission module to the power receiving module through electromagnetic induction between a power transmission coil of the power transmission module and a power receiving coil of the power receiving module
Implementation Method 2
In the power receiving module, AC power received by the power receiving coil is converted to DC power
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A non-contact charging system includes: a power transmission module (1) having a power transmission coil (2); and a power receiving module (3) having a power receiving coil (4) that receives power through electromagnetic induction and a built-in secondary battery (13) charged with DC power obtained by rectifying the received power, the power receiving module including a protection circuit (17) that prevents overdischarge of the secondary battery. The power receiving module includes a switching control section (13, 15) that performs switching between a storage mode where power supply from the secondary battery to all power supply portions including the protection circuit is shut off and a use mode where power supply is permitted, and a loading responsive section (11) that outputs a loading responsive signal when the power receiving module is loaded in a predetermined power receiving position. The switching control section is set to maintain the storage mode in the initial state, and switches the mode to the use mode and maintains the mode in response to output of the loading responsive signal. Power supply is entirely stopped in the initial state of a set device including the power receiving module, and permitted according to the state of use of the set device.