Dual-Battery Storage Mode Control for Reliable Device Wake-Up
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Solution Overview
Problem
Batteries in electronic devices often experience leakage during manufacturing, leading to insufficient charge upon delivery, necessitating a method to conserve and extend the battery's charge until first use.
Innovation Solution
A controller system utilizing dual batteries, where a secondary battery powers processing circuitry to manage the exit from battery storage mode by generating exit signals and retry mechanisms to ensure the primary battery supplies power to processing circuitry upon demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the battery is kept in storage mode to conserve charge, then charge retention is improved, but the ability to supply power upon boot-up deteriorates
Solution Approach 1:
The system performs preliminary actions by keeping the battery in storage mode with discharge protection enabled before boot-up, conserving charge during manufacturing and storage. Upon detecting a boot-up event, the system proactively disables discharge protection and transitions the battery to operational mode, ensuring power is available when needed without continuous energy consumption.
Solution Approach 2:
The battery management system dynamically transitions the battery between storage mode and operational mode based on system state. The discharge protection feature is dynamically enabled during storage to prevent self-discharge and disabled during operation to allow power supply, adapting the battery's electrical characteristics to match system requirements.
2Power
If the battery exits storage mode to supply power, then power availability is improved, but charge retention deteriorates
Solution Approach 1:
The system implements periodic checking of battery state and system power requirements. The battery remains in storage mode with discharge protection enabled during idle periods, and only transitions to operational mode when a boot-up event is detected, creating a periodic pattern of enabled/disabled discharge protection that balances power availability with charge retention.
3Reliability
If continuous monitoring is performed to ensure power supply, then reliability is improved, but energy consumption increases
Solution Approach 1:
The system extracts the power monitoring function from continuous operation and implements it only when needed. During storage mode, continuous monitoring is suspended to minimize energy consumption. Upon boot-up detection, the monitoring function is activated to verify battery status and ensure proper power transition, then reduced to periodic checks during normal operation.
Data Source
AI summary
A method of causing a first battery to exit a battery storage mode is provided. The method may include receiving, while the first battery is in the battery storage mode, a wake up signal indicating a power up event, generating an exit signal in response to the wake up signal, to cause the first battery to supply power to a first processing circuitry, waiting a predetermined time period following a predetermined edge of the exit signal, determining, after expiration of the predetermined time period, whether the first battery is supplying power to the first processing circuitry, and generating a second exit signal in response to determining that the first battery is not supplying power to the first processing circuitry. In the battery storage mode, a second battery provides power to the second processing circuitry to perform the method of causing the first battery to exit the battery storage mode.