Nitride Bidirectional Switch Interface for Conventional Battery Controllers
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Solution Overview
Problem
Conventional battery management systems lack a nitride-based bidirectional switching device capable of working with conventional battery protection controllers for high-frequency battery charging and discharging applications, requiring a more compact and efficient solution.
Innovation Solution
A nitride-based bidirectional switching device with an adaption module and substrate potential management module, configured to receive signals from a battery protection controller, manage substrate potential, and control current flow in both directions, protecting the battery from over-charging and over-discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional silicon MOSFET is used for battery management, then the system is reliable for battery protection, but the operation frequency is limited and the size is large
Solution Approach 1:
The patent changes the material parameter from conventional silicon to nitride-based semiconductor material, which fundamentally alters the device characteristics to achieve higher operation frequency and smaller size while maintaining battery protection functionality
Solution Approach 2:
The patent substitutes the conventional silicon-based mechanical/electrical system with a nitride-based semiconductor system that operates at higher frequencies with reduced physical dimensions, replacing the traditional approach with an advanced material-based solution
2Speed
If nitride-based bidirectional switching element is implemented, then higher operation frequency and compact size are achieved, but compatibility with conventional battery protection controller is lost
Solution Approach 1:
The patent introduces an adaption module as an intermediary component that translates between the conventional battery protection controller signals and the nitride-based bidirectional switching element requirements, enabling compatibility while preserving the high-frequency performance benefits
Solution Approach 2:
The adaption module serves multiple functions: signal translation, level shifting, and interface adaptation, allowing the nitride-based switching element to work with conventional controllers while maintaining its superior performance characteristics
3Adaptability or versatility
If bidirectional switching element operates in both directions, then current can flow in either direction, but substrate potential becomes unstable
Solution Approach 1:
The patent implements a substrate potential management module that actively maintains the substrate at a stable potential reference level regardless of current flow direction, ensuring equipotential conditions that prevent instability during bidirectional operation
Data Source
AI summary
A nitride-based bidirectional switching device is provided for working with a battery protection controller having a power input terminal, a discharge over-current protection (DO) terminal, a charge over-current protection (CO) terminal, a voltage monitoring (VM) terminal and a ground terminal. The nitride-based bidirectional switching device comprises a nitride-based bidirectional switching element and an adaption module configured for receiving a DO signal and a CO signal from the battery protection controller and generating a main control signal for controlling the bidirectional switching element. By implementing the adaption circuit, the nitride-based bidirectional switching element can work with conventional battery protection controller for battery charging and discharging management. Therefore, a nitride-based battery management system can be realized with higher operation frequency as well as a more compact size.