Series Battery Module Control via Superimposed Gate Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power supply devices with series-connected battery modules require separate units for communicating control signals, and existing configurations do not effectively transmit failure signals during gate driving operations, limiting control and monitoring capabilities.
Innovation Solution
Incorporating a gate driving signal processing circuit that delays and transmits gate driving signals through battery modules, allowing control and state signals to be superimposed on the gate driving signal, enabling control and monitoring of battery modules by shaping the waveform and including disconnecting or connecting units to manage series connections independently of the gate driving signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a separate unit is provided for communicating control signals, then control signal transmission is achieved, but device complexity increases
Solution Approach 1:
The patent combines the control signal communication function with the existing gate driving signal transmission path. The control signal is superimposed on the gate driving signal, allowing both signals to share the same transmission channel. This eliminates the need for a separate communication unit, thereby reducing device complexity while maintaining control signal transmission capability.
Solution Approach 2:
The gate driving signal line is given multiple functions: it serves both as the original gate driving signal transmission path and as a communication channel for control signals. By making the transmission path universal, the patent avoids adding separate dedicated communication channels, thus reducing overall system complexity.
2Reliability
If failure signal transmission is limited to periods when switches are off, then signal interference is avoided, but monitoring capability during operation is reduced
Solution Approach 1:
The patent implements periodic failure signal transmission during the periods when the gate driving signal is active. By utilizing the on-periods of the gate driving signal for failure signal transmission, the system achieves continuous monitoring capability without compromising signal reliability, as the periodic nature allows for structured signal separation and interpretation.
Solution Approach 2:
The patent uses the gate driving signal as an intermediary carrier that can simultaneously convey both the original gate driving function and the failure signal information. By encoding failure signals during the active periods of the gate driving signal, the system achieves continuous monitoring while maintaining signal reliability through the intermediary's periodic structure.
Data Source
AI summary
A power supply device includes a plurality of battery modules, the battery modules are connected to one another in series according to a gate driving signal from a controller, the power supply device delays the gate driving signal in a gate driving signal processing circuit included in each of the battery modules, and thereafter, transmits the gate driving signal from an upstream to a downstream of the series connection, and the power supply device controls the battery modules by superimposing a control signal for the battery module on the gate driving signal.