Battery Impact Sensing With Mode-Based Power Saving
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Solution Overview
Problem
Existing battery systems with acceleration sensors experience excessive power consumption during low-power states due to continuous impact measurement, leading to battery discharge.
Innovation Solution
A method and system that utilizes a main control unit to store previous and current operation modes, a change flag, and an impact count, allowing the MCU to selectively receive acceleration sensor signals only when necessary, thereby reducing power consumption by differentiating between operation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the acceleration sensor continuously measures external impact to ensure battery safety, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The system performs impact measurement periodically based on operation mode rather than continuously. In sleep mode, the acceleration sensor operates at reduced frequency or is temporarily deactivated, while in active modes it operates at full frequency. This periodic measurement approach ensures battery safety is maintained while significantly reducing power consumption during low-power states.
Solution Approach 2:
The measurement frequency and sensor operation mode are dynamically adjusted according to the current operation mode of the battery system. The system transitions between different measurement intensities based on real-time operational requirements, using high-frequency measurement during active operation and low-frequency or suspended measurement during sleep mode, thereby optimizing the balance between safety monitoring and power consumption.
2Reliability
If the acceleration sensor operates during sleep mode to monitor impact, then reliability is improved, but loss of energy increases
Solution Approach 1:
The system applies different operational characteristics to the acceleration sensor based on the local condition (operation mode). During sleep mode, the sensor operates in a low-power state with reduced measurement activity, while during active modes it operates at full capability. This localized adaptation of sensor operation ensures reliability is maintained when needed while minimizing energy loss during low-power states.
3Measurement precision
If the MCU processes acceleration sensor signals continuously to accurately detect impact, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The MCU processes acceleration sensor signals periodically based on operation mode transitions and change flags rather than continuously. When the operation mode changes or an impact event is detected, the MCU activates to process the signal and update the impact count. During stable sleep mode, the MCU remains in low-power state, significantly reducing power consumption while maintaining the ability to detect and respond to impact events when they occur.
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
This approach effectively reduces power consumption by minimizing unnecessary sensor signal reception in low-power modes, thereby preventing excessive battery discharge.
Implementation Method 1
an acceleration sensor configured to generate an acceleration sensor signal by measuring an acceleration of the battery system
Data Source
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Figure 3~4
AI summary
Discussed is a method for measuring an impact for a battery, which includes: storing a previous operation mode of a battery system in a first area of a memory; storing a current operation mode of the battery system in a second area of the memory; determining whether the previous operation mode and the current operation mode are the same as each other; storing a change flag in a third area of the memory as a first value when the previous operation mode and the current operation mode are different from each other; receiving an acceleration sensor signal from an acceleration sensor when the current operation mode is a sleep mode and the change flag is the first value; and receiving the acceleration sensor signal from the acceleration sensor when the current operation mode is not the sleep mode.