Battery Protection IC Control Circuit for Detection Accuracy
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Solution Overview
Problem
Mobile information processing devices face challenges in reducing power consumption and maintaining detection accuracy for battery protection circuits, particularly in wearable devices with limited power generation capacity, where intermittent operation of current and voltage detection circuits leads to fluctuations affecting detection accuracy.
Innovation Solution
A mobile information processing device with a control circuit that manages enable signals for current and voltage detection circuits, allowing intermittent operation to reduce power consumption while fetching output signals during stable periods to improve detection accuracy, and coordinating enable signals to minimize detection period fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the current detection circuit and voltage detection circuit are operated intermittently, then power consumption is reduced, but detection accuracy is affected due to current fluctuations when the circuit is started or stopped
Solution Approach 1:
The patent applies preliminary action by performing a stabilization wait period after activating the detection circuit before conducting voltage or current detection. The control circuit activates the detection circuit, waits for a predetermined period to allow current fluctuations to stabilize, then performs the detection. This preliminary stabilization step ensures accurate measurements while maintaining intermittent operation to reduce power consumption.
Solution Approach 2:
The patent implements dynamics by adaptively adjusting the detection timing based on the operational state of the detection circuit. The control circuit dynamically determines detection moments by monitoring whether the circuit has completed startup or shutdown processes, ensuring detections occur only during stable operational phases when current fluctuations are minimal, thus maintaining both low power consumption and high detection accuracy.
2Measurement precision
If the monitoring operation interval of the detection circuit is reduced, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing intermittent operation of the detection circuit with predetermined intervals rather than continuous operation. The control circuit activates the detection circuit only during specific periods when voltage or current detection is required, allows it to remain inactive during other periods to conserve power, and repeats this cycle as needed. This periodic activation maintains detection accuracy when performed while significantly reducing overall power consumption compared to continuous operation.
Data Source
AI summary
An integrated circuit includes: a first current detection circuit configured to, when a first enable signal is in an activated state, detect a current flowing between a first node and a second node, and generate an output signal, and when the first enable signal is in a deactivated state, stop a current detection operation; a first voltage detection circuit, which operates intermittently or operates continuously, that is configured to detect a voltage at the first node, and generate an output signal; and a control circuit that is configured to generate the first enable signal and supply the first enable signal to the first current detection circuit, and is configured to fetch the output signal of the first voltage detection circuit in a period other than the period in which the first enable signal transitions from a deactivated state to an activated state.