Bidirectional Voltage Regulation Circuit for Battery Cell Charging
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Solution Overview
Problem
Existing transformers lack bidirectional voltage regulation capability, leading to inadequate voltage regulation in scenarios requiring bidirectional adjustment, and result in inefficiencies such as partial charging of battery cells.
Innovation Solution
A voltage regulation circuit utilizing NMOS transistors and an inductor, controlled by a control chip, enabling bidirectional voltage regulation through switching modes to adjust power supply voltage as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional transformer is used for voltage regulation, then the structure is simple and easy to manufacture, but the voltage regulation function is limited to one-way adjustment only
Solution Approach 1:
The voltage regulation circuit is segmented into multiple independent NMOS transistors (first NMOS transistor, second NMOS transistor, third NMOS transistor) that can be independently controlled. Each transistor operates in different switching states to achieve different voltage regulation functions, enabling bidirectional regulation capability while maintaining modular structure that simplifies manufacturing.
Solution Approach 2:
The circuit employs dynamic switching control where the NMOS transistors transition between on and off states based on charging/discharging requirements. The control chip dynamically adjusts the switching states of different transistors to adaptively regulate voltage in both directions, transforming a static one-way regulator into a dynamic bidirectional system.
2Reliability
If a traditional transformer is used, then the device complexity is low, but the voltage regulation effect is poor for bidirectional scenarios
Solution Approach 1:
The voltage regulation circuit is designed with multi-functionality to handle both charging and discharging scenarios. By configuring NMOS transistors in specific switching states, the same circuit structure can regulate voltage upward during charging and downward during discharging, providing universal voltage regulation capability that improves reliability across different operating conditions.
Solution Approach 2:
The circuit changes operational parameters (switching states of NMOS transistors) based on the required voltage regulation direction. During charging, specific transistors are switched to enable voltage boosting; during discharging, different switching states enable voltage reduction. This parameter adaptation ensures reliable voltage regulation效果 in bidirectional scenarios.
3Adaptability or versatility
If NMOS transistors are used for bidirectional voltage regulation, then the voltage regulation effect is improved, but the device complexity increases
Solution Approach 1:
Multiple NMOS transistors are merged into a single integrated voltage regulation circuit controlled by one control chip. The transistors work cooperatively in different switching combinations to achieve bidirectional regulation, reducing the need for separate circuits for charging and discharging, thereby managing complexity through functional integration.
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
Enables full charging of battery cells and efficient power management by boosting or bucking voltage as required, improving utilization rates and reducing waste.
Implementation Method 1
a first terminal of the inductor is further electrically connected to a drain electrode of the third NMOS transistor
Implementation Method 2
a drain electrode of the first NMOS transistor is electrically connected to a drain electrode of the second NMOS transistor
Data Source
AI summary
Disclosed are a voltage regulation circuit, a power supply module, a vehicle, and a control method. The voltage regulation circuit includes a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a control chip and an inductor; and an output terminal of the control chip is electrically connected to a gate electrode of the first NMOS transistor, a gate electrode of the second NMOS transistor, and a gate electrode of the third NMOS transistor, respectively; where a source electrode of the first NMOS transistor is electrically connected to a second terminal of the inductor. According to the technical solution of the present disclosure, at least a problem of a poor voltage regulation effect of an existing transformer may be solved.