Battery Shutdown Control for Deep Discharge Protection
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Solution Overview
Problem
Batteries experience capacity decrease due to self-consumption over time, leading to copper precipitation and potential short circuits when capacity is extremely low, necessitating deep discharge protection to prevent failure.
Innovation Solution
A battery device with a control chip that measures electrical capacity and controls the battery to enter a shutdown mode when capacity is low, disconnecting power and reducing self-consumption to prevent deep discharge and extend usable time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery operates continuously without shutdown, then the battery can supply power to the electronic device, but the self-consumption causes capacity to decrease to extreme low levels leading to copper precipitation and short circuits
Solution Approach 1:
The control chip performs preliminary assessment of battery capacity before shutdown. It measures the battery capacity and evaluates communication status and charging/discharging state in advance, then proactively enters shutdown mode before the battery reaches extreme low capacity, preventing copper precipitation and short circuits
Solution Approach 2:
The control chip continuously monitors battery capacity, communication status, and charging/discharging state, and adjusts the power supply state accordingly. When the battery capacity is less than preset capacity and the device is not communicating or being charged/discharged, the control chip transitions to shutdown mode, creating a feedback loop that prevents deep discharge
2Duration of action of stationary object
If the battery enters shutdown mode early to protect against deep discharge, then self-consumption is reduced and battery life is extended, but the battery cannot supply power when the electronic device needs it
Solution Approach 1:
The control chip continuously monitors three key parameters: battery capacity, communication status with electronic device, and charging/discharging state. Based on real-time feedback from these parameters, the control chip intelligently decides whether to maintain power supply or enter shutdown mode, ensuring power availability when needed while extending standby time
Solution Approach 2:
The power supply state is dynamic rather than static. The control chip adjusts the power supply state based on real-time conditions: maintaining power supply when capacity is sufficient or device is communicating/being charged, and transitioning to shutdown mode when capacity is low and device is idle, optimizing both availability and duration
3Reliability
If the control chip continuously monitors battery capacity and communicates with electronic device, then accurate deep discharge protection is achieved, but self-consumption increases
Solution Approach 1:
The control chip performs preliminary assessment of all three parameters (battery capacity, communication status, charging/discharging state) before making the shutdown decision. This preliminary action allows accurate determination of whether shutdown is necessary, achieving reliable deep discharge protection while avoiding unnecessary continuous monitoring that would increase self-consumption
Solution Approach 2:
The control chip monitors all three parameters but only transitions to shutdown mode when all conditions are met (capacity below preset threshold AND not communicating OR not being charged/discharged). This partial action approach ensures accurate protection while minimizing the frequency of shutdown transitions, balancing monitoring accuracy with energy conservation
Data Source
AI summary
A battery device and a battery protection method for same are provided. It is determined, according to electrical capacity of a battery, whether a battery device communicates with an electronic device, and whether the battery is being charged or discharged, whether to control the battery device to enter a shutdown mode.