Battery Equalization Circuit Using Resistor Discharge and Transformer Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity of driving apparatuses in existing equalization circuits for lithium battery systems leads to increased costs and reduced efficiency in voltage equalization across battery cells, as they require complex electronic components and switching transistors for both high-voltage and low-voltage equalization.
Innovation Solution
A control circuit apparatus with a switch matrix network unit, first and second equalization units, and ports, where the first equalization unit discharges high-voltage cells through a resistor and the second unit charges low-voltage cells using a power supply, simplifying the circuit structure and reducing component complexity by eliminating the need for complex driving solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex driving apparatus is used in the equalization circuit to achieve both voltage step-down and voltage step-up functions, then the equalization capability is improved, but the device complexity increases
Solution Approach 1:
The equalization circuit is divided into two separate units: a first equalization unit for voltage step-down (discharge equalization) and a second equalization unit for voltage step-up (charge equalization). Each unit has its own simplified driving apparatus, avoiding the need for a single complex driving system to handle both functions.
Solution Approach 2:
The switch matrix network unit is shared by both equalization units, allowing one switching component to serve multiple functions. This reduces overall device complexity while maintaining full equalization capability for both high-voltage and low-voltage cells.
2Reliability
If complex electronic components and switching transistors are used in the equalization circuit, then the voltage equalization function is improved, but the manufacturing cost increases
Solution Approach 1:
By separating the equalization function into two independent units with different simplification strategies, each unit can use the most cost-effective components for its specific function, reducing overall manufacturing cost while maintaining reliability.
Solution Approach 2:
The first equalization unit uses a resistor for voltage step-down, which is a simple, inexpensive component compared to complex switching transistors. This significantly reduces manufacturing cost for the discharge equalization function while maintaining sufficient reliability.
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 solution reduces the complexity and cost of the driving apparatus, enabling efficient voltage equalization across battery cells by using a resistor for discharge and a transformer-based charging mechanism, thereby extending the life of the battery system.
Implementation Method 1
the second equalization unit includes a transformer, a first switch unit, a second switch unit, and a third switch unit, and the transformer includes a first primary-side winding and a first secondary-side winding
Implementation Method 2
The first equalization unit is configured to discharge the to-be-discharged battery unit through a resistor unit
Data Source
AI summary
This application provides a control circuit apparatus of a battery system and a battery management system, and is applied to the field of battery equalization technologies. The control circuit apparatus in this application includes a switch matrix network unit, a first equalization unit, and a second equalization unit. The switch matrix network unit is configured to: form a loop between m battery units in the battery system and the first equalization unit, and form a loop between the m battery units in the battery system and the second equalization unit. The first equalization unit discharges a high-voltage battery unit through a resistor unit, and the second equalization unit charges a low-voltage battery unit through a transformer.