Oxide Semiconductor Transistor Power Storage Device
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Solution Overview
Problem
Current power storage devices face challenges in reducing power consumption, especially in resting states, and improving safety and efficiency in battery monitoring and management.
Innovation Solution
A power storage device incorporating a battery, a control circuit with an oxide semiconductor transistor, and a converter circuit that selects and converts AC or DC voltages, including a sample-and-hold circuit to measure and retain battery voltage and current data, allowing for efficient power management and capacity calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional transistors are used in control circuits, then the device can operate normally, but power consumption in resting state is high
Solution Approach 1:
The patent changes the material parameter of the transistor from conventional semiconductor to oxide semiconductor, which fundamentally alters the electrical characteristics to achieve ultra-low off-state current while maintaining data retention capability through the material's inherent properties
Solution Approach 2:
The patent employs a composite structure combining oxide semiconductor layer with other functional layers (electrode layers, insulating layers) to create a transistor that achieves both low power consumption and reliable data retention through the synergistic properties of the composite material system
2Reliability
If the control circuit continuously monitors battery voltage and current, then safety is improved, but power consumption increases
Solution Approach 1:
The control circuit performs periodic measurement of battery voltage and current at predetermined intervals rather than continuous monitoring, reducing power consumption while maintaining adequate safety monitoring through timely periodic assessments
Solution Approach 2:
The oxide semiconductor transistor inherently maintains its state without requiring continuous power supply, enabling the control circuit to retain measurement data passively while consuming minimal energy, thus achieving self-service operation for data retention
3Speed
If the device remains in normal state for quick response, then response time is short, but power consumption is high
Solution Approach 1:
The patent implements dynamic power management that allows the device to switch between resting state and normal state based on operational requirements, using the oxide semiconductor transistor's rapid switching capability to achieve quick state transitions while minimizing time spent in high-power state
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 reduces power consumption, enhances safety, and shortens the time needed to transition from a resting state to a normal state by effectively managing battery voltage and current data, improving overall power storage device efficiency.
Implementation Method 1
the control circuit includes a transistor including an oxide semiconductor in a channel formation region
Data Source
AI summary
Power consumption of a power storage device is reduced. A highly safe power storage device is provided. Safety of a battery monitored by a semiconductor device is improved. Power consumption is reduced; for example, power in a resting state is reduced. Time needed to perform processing for transition from a resting state to a normal state is shortened or energy is reduced. A power storage device includes a battery, a control circuit, and a converter circuit. The converter circuit has a function of supplying a voltage to the battery; and the control circuit has a function of measuring data of a voltage of the battery and a function of retaining the data of the voltage of the battery.