Dual Booster Voltage Supplier for Parallel Battery Packs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Voltage suppliers using N-channel MOSFETs face the challenge of unintended charging between batteries coupled in parallel due to voltage differences, which can lead to inefficient energy distribution and potential damage.
Innovation Solution
The implementation of a dual booster circuit system that includes first and second booster circuits, each with a corresponding battery switching circuit, which generates boosted voltages to control the flow of current between battery packs, thereby reducing or inhibiting charging between them by using N-channel MOSFETs or IGBTs as switching devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If N-channel MOSFETs are used as switching devices for large discharge current, then the switching device can handle large current, but a booster circuit is required to generate gate driving voltage higher than battery voltage
Solution Approach 1:
The patent combines multiple battery packs into a single voltage supplier system where batteries are coupled in parallel. The control circuit manages multiple batteries collectively, eliminating the need for individual booster circuits for each battery while still enabling N-channel MOSFETs to handle large discharge currents effectively.
Solution Approach 2:
The control circuit serves multiple functions: it monitors voltage of all batteries, determines which battery to discharge based on voltage levels, controls the switching devices, and prevents charging between batteries. This multi-functional approach replaces the need for separate booster circuits at each battery.
2Quantity of substance
If batteries are coupled in parallel to increase capacity, then the energy storage increases, but charging may occur between batteries due to voltage differences
Solution Approach 1:
The control circuit continuously monitors the voltage of each battery in the parallel configuration. Based on this feedback, it intelligently selects which battery to discharge and controls the switching devices to prevent current flow from higher voltage batteries to lower voltage batteries, thereby preventing unwanted charging.
Solution Approach 2:
The control circuit acts as an intermediary between the parallel-coupled batteries. It manages the current flow paths through the switching devices, ensuring that batteries discharge independently to the external load without direct current flow between them, thus preventing voltage imbalance-induced charging.
3Power
If multiple batteries are coupled in parallel, then the power supply capacity increases, but voltage imbalances can cause inefficient energy distribution
Solution Approach 1:
The control circuit monitors voltage levels of all parallel-coupled batteries and uses this information to make intelligent decisions about which battery to discharge. This feedback mechanism ensures that batteries with lower voltage are discharged first, maintaining optimal energy distribution efficiency and preventing energy loss from charging/discharging cycles between batteries.
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 reduces or inhibits the flow of electric current between battery packs, ensuring that charging is minimized, thus maintaining efficient energy distribution and preventing potential damage from voltage imbalances.
Implementation Method 1
a voltage supplier using the N-channel MOSFET needs to include booster circuit boosting the voltage of the battery to generate the gate driving voltage
Data Source
AI summary
A voltage supplier in one aspect of the present disclosure includes a first voltage generator, a second voltage generator, a first switcher, a second switcher, a first booster, and a second booster. The first booster boosts a voltage lower than a first switching drive voltage to thereby generate the first switching drive voltage, and supplies the first switching drive voltage to the first switcher on a first supply path. The second booster boosts a voltage lower than a second switching drive voltage to thereby generate the second switching drive voltage, and supplies the second switching drive voltage to the second switcher on a second supply path.