Battery Safety Circuit Low Current Power Down Mode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium batteries suffer from self-discharge when not in use, leading to reduced shelf life and potential irreversible damage, especially when stored prior to sale, and conventional methods to extend shelf life either increase manufacturing costs or negatively impact battery health.
Innovation Solution
Implementing a wireless test and shutdown system that allows electronic devices to transition to a low power mode without the need for physical interfaces, using over-the-air commands to manage battery state and reduce self-discharge, thereby extending the shelf life of lithium batteries without compromising their useful lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If lithium battery is charged to higher capacity to extend shelf life, then shelf life is improved, but battery health deteriorates and manufacturing costs increase
Solution Approach 1:
The patent implements dynamic power management that transitions the device between active and sleep modes based on operational state. The system dynamically adjusts CPU frequency, enables dynamic voltage scaling, and selectively powers down peripheral components, allowing the battery to maintain adequate charge levels without requiring excessive initial charging that would harm battery health.
Solution Approach 2:
The system changes operational parameters by adjusting CPU frequency scales, modifying voltage levels through dynamic voltage scaling, and altering power states of various components. These parameter changes enable the device to operate efficiently at lower power consumption levels, extending battery shelf life without compromising battery health through excessive charging.
2Reliability
If physical debug interfaces and manual button presses are used for device testing, then device functionality can be verified, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent replaces mechanical debugging interfaces and manual button press operations with wireless communication capabilities. The system uses wireless protocols to receive test commands, transmit device status, and control device operations remotely, eliminating the need for physical debug connectors and manual interaction while maintaining full testing and operational control capabilities.
Solution Approach 2:
The system introduces wireless communication as an intermediary between the user/testing equipment and the device under test. This intermediary enables remote interaction with the device, allowing test commands to be transmitted and results to be received without physical contact, thereby reducing device complexity while preserving testing functionality.
Data Source
AI summary
An electronic device includes a rechargeable battery, an electrical circuit, a battery safety circuit, and a power down mode circuit. The electrical circuit is configured to generate a power mode control signal. The power down mode circuit receives the power mode control signal. If the power mode control signal has a first value, the power down mode circuit is configured to force a voltage at a first port of the battery safety circuit to a voltage value that is less than an under voltage lock out (UVLO) threshold value of the battery safety circuit to transition the electronic device from a normal operating mode to a low current power down mode. The electronic device may further include a wake up mode circuit.