Battery Monitoring Timing Sync for Low-Power State Diagnosis
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Solution Overview
Problem
In the battery distribution process, there is a limitation in measuring voltage and temperature of each battery due to power constraints, leading to high power consumption in battery management systems.
Innovation Solution
A battery management apparatus and method that synchronizes the operation time of the measuring unit in measurement mode with the control unit in communication mode, reducing operation time in communication mode by adjusting the next operation time point based on communication and measurement cycles, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the battery management system continuously measures voltage and temperature of each battery, then the battery state diagnosis accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic measurement cycles where the measuring unit operates in measurement mode only during predetermined measurement time intervals at preset measurement cycles, rather than continuously. This periodic operation significantly reduces power consumption while still achieving effective battery state diagnosis through regular sampling of voltage and temperature data.
Solution Approach 2:
The control unit dynamically adjusts the operation time of the measuring unit based on battery state information. When abnormal states are detected, the measurement frequency increases; when normal operation is confirmed, the measurement frequency decreases. This dynamic adjustment optimizes the balance between diagnosis accuracy and power consumption.
2Measurement precision
If the measuring unit operates continuously in measurement mode, then the measurement precision is improved, but the power consumption increases
Solution Approach 1:
The measuring unit switches between measurement mode and standby mode periodically. During measurement mode, it accurately measures voltage and temperature; during standby mode, it consumes minimal power. This periodic switching is controlled by the control unit based on preset measurement cycles and durations.
Solution Approach 2:
The system changes operational parameters (measurement time, measurement cycle, operation time) based on battery state. When batteries are in normal state, longer measurement cycles and shorter measurement times are used to save power. When abnormal states are detected, the system switches to shorter cycles and longer measurement times to improve monitoring accuracy.
3Loss of information
If the control unit operates in communication mode for longer duration, then the battery information reception is improved, but the power consumption increases
Solution Approach 1:
The control unit operates in communication mode periodically at preset communication cycles rather than continuously. It receives battery information from the measuring unit during these periodic intervals, then returns to a low-power state. This periodic communication operation reduces power consumption while ensuring timely receipt of battery status data.
4Measurement precision
If the measurement cycle is shortened, then the measurement precision is improved, but the power consumption increases
Solution Approach 1:
The measurement cycle duration is dynamically adjusted based on battery state. During normal operation, longer measurement cycles are used to reduce power consumption. When voltage or temperature deviations are detected, the system automatically shortens the measurement cycle to improve monitoring accuracy and respond to potential failures.
Data Source
AI summary
A battery management apparatus is discussed, and includes: a measuring unit connected to a battery and configured to operate in a measurement mode during a predetermined measurement time at each preset measurement cycle and measure battery information including at least one of voltage and temperature of the battery while operating in the measurement mode; and a control unit configured to operate in a communication mode during a preset operation time at each preset communication cycle, receive the battery information from the measuring unit while operating in the communication mode, set a next operation time point at which the measuring unit is to operate in the measurement mode based on at least one of the communication cycle and a measurement time, and change an operation time to operate in the communication mode at each subsequent communication cycle based on the measurement time.