Active Balancer Resonance Detection With Fewer Circuits
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Solution Overview
Problem
Existing active balancers require multiple detection circuits for voltage and current resonance detection, leading to increased size and manufacturing costs.
Innovation Solution
A novel resonant circuit configuration with a capacitor and inductance between cells, using a reduced number of detection circuits that detect both voltage and current resonance of switching elements, allowing for efficient switching control and reduced power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detection circuits are used for voltage and current resonance detection in conventional active balancers, then the resonance detection accuracy is improved, but the device size and manufacturing cost increase
Solution Approach 1:
The patent combines voltage detection and current detection functions into a single integrated detection circuit. The detection circuit includes an operational amplifier that can detect both voltage resonance and current resonance by utilizing the relationship between voltage and current in the resonant circuit, thereby reducing the number of separate detection circuits while maintaining detection accuracy
Solution Approach 2:
The detection circuit is designed with multi-functionality to perform both voltage detection and current detection tasks. By using a single operational amplifier with appropriate circuit configuration, the same detection circuit can monitor both voltage and current parameters, eliminating the need for separate dedicated detection circuits for each parameter
2Measurement precision
If multiple detection circuits are used for voltage and current resonance detection, then the resonance detection capability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple detection circuits into one integrated detection circuit, reducing the total component count including operational amplifiers, resistors, and capacitors. This consolidation directly reduces manufacturing costs while preserving the capability to detect both voltage and current resonance through the single circuit
3Measurement precision
If the active balancer uses conventional detection circuit configuration, then the resonance detection is accurate, but the device size increases
Solution Approach 1:
The patent combines voltage detection and current detection functions into a single integrated detection circuit, significantly reducing the circuit board area required. The operational amplifier-based detection circuit with shared components occupies less space compared to having separate dedicated detection circuits for voltage and current
Solution Approach 2:
The patent uses the operational amplifier as an intermediary element that can process both voltage and current signals. By using the operational amplifier to detect both voltage resonance and current resonance through appropriate circuit configuration, the need for separate detection circuits is eliminated, reducing overall device size
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
This configuration simplifies the detection circuitry, reducing the size and cost of the active balancer while maintaining effective voltage equalization across cells, thereby minimizing switching losses.
Implementation Method 1
The soft switching method includes an LC resonant circuit consisting of an inductance element and a capacitor for determining the timing of the switching
Implementation Method 2
The active balancer controls the electric current or the voltage to a sine wave shape by using the LC resonant circuit
Implementation Method 3
detection circuits that detect the voltages of the switching elements. The active balancer of the present technology is characterized in that the detection circuits detect a voltage resonance and an electric current resonance of the switching elements
Implementation Method 4
the detection circuits detect a voltage resonance and an electric current resonance of the switching elements
Data Source
AI summary
An active balancer achieving reductions in size and price. The active balancer according to the present technology may equalize the voltages of a plurality of cells. The active balancer may be provided with a capacitor and an inductance arranged between the cells. The active balancer may be further provided with: a plurality of switching elements Q1, Q2, Q3, Q4 for switching connection states between the plurality of cells, and detection circuits M1, M2, M3, M4 for detecting the voltages of the switching elements Q1, Q2, Q3, Q4. The detection circuits M1, M2, M3, M4 may detect voltage resonance and current resonance of the switching elements Q1, Q2, Q3, Q4.