Wireless Battery Monitoring for Synchronized Voltage-Current Sampling
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Solution Overview
Problem
Existing battery monitoring systems require harnesses to connect battery measuring devices with electric-current sensors, limiting the realization of a harnessless configuration and making it difficult to achieve synchronized acquisition of voltage and current information.
Innovation Solution
A battery monitoring system that uses wireless communication to transmit voltage measuring instructions to battery measuring devices, allowing for the acquisition of synchronized voltage and current information without the need for harnesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless communication is used to connect battery measuring devices with the monitoring device, then the harnessless configuration is achieved and device complexity is reduced, but communication timing errors occur and synchronized acquisition of voltage and current information becomes difficult
Solution Approach 1:
The monitoring device transmits a voltage measuring instruction to the battery measuring device before the actual voltage measurement is performed. This preliminary instruction allows the battery measuring device to prepare for measurement and enables the monitoring device to know in advance when the voltage will be acquired, thereby facilitating synchronized current measurement without requiring complex timing synchronization during the actual measurement process
Solution Approach 2:
The voltage measuring instruction acts as an intermediary signal that coordinates between the monitoring device and the battery measuring device. By using this instruction signal as a reference point, the system establishes a common timing basis that allows both voltage and current measurements to be synchronized without requiring direct timing synchronization between the wireless communication and the current acquisition
Data Source
AI summary
A battery monitoring system includes battery measuring devices and a battery monitoring device. Each of the battery measuring devices detects voltage information on a corresponding battery. The battery monitoring device is configured to: acquire the voltage information from each of the battery measuring devices by using wireless communication; and acquire current information on current flowing through the corresponding battery from an electric-current sensor. The battery monitoring device includes a control unit and a wireless communication unit. The wireless communication unit executes wireless communication with the battery measuring devices with a predetermined period. The control unit is configured to: cause the wireless communication unit to output a voltage measuring instruction; and based on a timing at which the wireless communication unit transmits the voltage measuring instruction to the battery measuring device, acquire the current information during a time interval in which the battery measuring device acquires voltage information.