Battery Pack Parallel Series Switching for Voltage Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery packs with unequal cell unit voltages face limitations in usage and charging efficiency, as unequal voltages can prevent efficient operation and lead to reduced battery life due to excessive current flow during storage.
Innovation Solution
A battery pack design that includes interchangeable battery blocks connected in parallel or series, allowing for voltage equalization during storage and independent voltage output to accommodate different electric working machines, with a terminal portion that connects or disconnects the blocks based on the connected machine, enabling efficient use and simplifying the insulation structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple battery blocks are connected in series to output high voltage, then the battery pack can be applied to multiple rated voltages, but the voltages of the multiple battery blocks become unequal and cannot be equalized during storage
Solution Approach 1:
The patent implements a dynamic switching mechanism that changes the connection configuration between battery blocks based on operational needs. A switching element connects the battery blocks in parallel during storage to equalize voltages, and switches them to series connection when high voltage operation is required, making the system adaptable to different states
Solution Approach 2:
The battery pack design incorporates a universal terminal structure that can accommodate both parallel and series connections of battery blocks. The terminal includes multiple connection points and switching elements that enable the same battery pack to function in different voltage configurations (low voltage parallel mode for storage/equalization and high voltage series mode for operation)
2Adaptability or versatility
If multiple battery blocks are connected in parallel to output low voltage, then the battery pack can be applied to low voltage machines, but the battery pack may not be efficiently used when voltages are unequal
Solution Approach 1:
The system dynamically switches between parallel and series configurations based on the connected device's voltage requirements. When a low voltage machine is connected, the switching element configures the battery blocks in parallel for efficient low voltage operation. When disconnected or when a high voltage machine is connected, it switches to series configuration, optimizing productivity for different operational scenarios
3Adaptability or versatility
If the battery pack uses interchangeable connection configurations, then it can adapt to different machines, but the insulation structure becomes more complex
Solution Approach 1:
The patent merges the insulation functions into a integrated terminal structure that combines connection points, switching elements, and insulation components into a single unified assembly. This terminal structure handles both the electrical switching between configurations and the insulation requirements, reducing overall system complexity compared to separate insulation components for each configuration
Data Source
AI summary
A battery pack in one aspect of the present disclosure includes a first battery block, a second battery block, and a terminal portion. The terminal portion is configured to output a parallel voltage of the battery block and the second battery block connected in parallel in response to a state where a first electric working machine is connected to the terminal portion. The terminal portion is configured to output a first voltage of the first battery block and a second voltage of the second battery block individually in response to a state where a second electric working machine is connected to the terminal portion.