Flying Capacitor Voltage Detection Single Branch Line
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing voltage detecting devices for battery packs with multiple battery stacks require a large number of circuit components to manage current directions, leading to increased size and manufacturing costs.
Innovation Solution
A flying capacitor type voltage detecting device that uses a single branch line for both charging and discharging currents, eliminating the need for separate circuit elements to restrict current directions and reducing the overall number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diodes are disposed on two lines to restrict current directions for charging and discharging the capacitor, then the current directions are properly controlled, but the number of circuit components increases
Solution Approach 1:
The patent merges the charging line and discharging line into a single common line, eliminating the need for separate diodes on each line. The single diode on the branch line controls current direction for both charging and discharging operations, reducing the total number of circuit components while maintaining proper current direction control.
Solution Approach 2:
The single diode on the branch line serves multiple functions: it controls current direction during capacitor charging, controls current direction during capacitor discharging, and prevents reverse current flow in both operations. This multi-functional diode replaces what would traditionally require multiple diodes distributed across separate lines.
2Device complexity
If the number of circuit components is reduced by using a single branch line, then manufacturing cost and device size decrease, but current direction restriction capability must be maintained
Solution Approach 1:
The patent combines the functions of current direction control for both charging and discharging into a single diode located on the branch line. This single diode strategically positioned at the branch point effectively controls current flow in all operations, maintaining reliability while reducing component count.
Solution Approach 2:
The branch line with its single diode acts as an intermediary control point that mediates current flow between the common line and both the charging/discharging paths. This intermediary structure provides centralized control over current direction, ensuring proper operation without requiring multiple distributed control elements.
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 effectively suppresses the increase in circuit components, reducing the size and manufacturing costs of the voltage detecting device while maintaining accurate voltage detection across battery stacks.
Implementation Method 1
a flying capacitor type voltage detecting device which uses a capacitor to detect a voltage of each battery stack
Data Source
AI summary
A flying capacitor type voltage detecting device which uses a capacitor to detect a voltage of each battery stack of a battery pack which includes a plurality of battery stacks each of which includes a plurality of battery cells connected in series, includes: a detecting unit that detects a voltage between both ends of the capacitor, as the voltage of each battery stack; and a branch line that is a single line which is branched from a connection line connecting the battery stacks and the detecting unit and connected to the capacitor and where a current during charging of the capacitor and a current during discharging of the capacitor flow in opposite directions.