Battery Parallel Device with Equal Impedance Paths
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Solution Overview
Problem
Conventional battery systems face challenges with weight, volume, and safety issues due to the use of large single batteries or packs of small batteries, which can lead to unbalanced parallel structures causing voltage differences and reduced battery life, especially when detecting inrush currents becomes difficult.
Innovation Solution
A battery parallel device with equal charge and discharge path impedances is designed, comprising multiple battery units connected through balanced current paths and comb-type connectors to ensure consistent current flow, reducing inrush currents and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a large single chargeable battery is used to reduce weight and volume, then the weight and volume burden is reduced, but the manufacturing complexity increases and safety decreases
Solution Approach 1:
The battery pack is divided into multiple small chargeable batteries (first battery units, second battery units) instead of using a single large battery. Each small battery has its own current path, simplifying manufacturing while achieving the desired weight and volume reduction through modular design
2Weight of stationary object
If a large single chargeable battery is used to reduce weight and volume, then the weight and volume burden is reduced, but safety decreases due to higher explosion probability
Solution Approach 1:
The battery system is segmented into multiple small batteries rather than one large battery. This segmentation reduces the risk associated with any single battery failure, as problems are contained to individual units rather than affecting the entire system, thereby improving safety while maintaining reduced weight
3Ease of manufacture
If small batteries are connected in parallel without balanced current paths, then the battery pack can be assembled, but voltage differences occur and battery life is reduced due to unbalanced parallel structure
Solution Approach 1:
Each current path in the parallel battery configuration is given equal length and impedance characteristics. This local uniformity ensures that current distributes evenly across all battery units, preventing voltage differences and extending battery life while maintaining manufacturing simplicity
4Difficulty of detecting and measuring
If conventional current detection methods are used, then current monitoring is possible, but inrush currents greater than 100 amperes cannot be detected accurately
Solution Approach 1:
The total current is divided into multiple separate current paths, each carrying a portion of the total current. This segmentation allows conventional detection methods to accurately measure current in each individual path, even when the total inrush current exceeds 100 amperes, as each path's current remains within detectable ranges
Data Source
AI summary
A battery parallel device having a charge path and a discharge path with equal impedances includes at least one first parallel apparatus. The at least one first parallel apparatus has first battery units each having a plurality of first batteries, a first positive connector electrically connected to positive electrodes of the first batteries, a first negative connector electrically connected to negative electrodes of the first batteries, a first positive electrode connector formed on the first positive connector, a first negative electrode connector formed on the first negative connector, first current paths formed between the first positive electrode connector and the positive electrodes, and second current paths formed between the first negative electrode connector and the negative electrodes. A total path length of the first current paths and a total path length of the second current paths corresponding to the same first batteries are equal. Therefore, inrush current may be decreased.