Battery Protection Board Dual-Circuit Layout for Overcurrent Limits
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Solution Overview
Problem
Lithium batteries face limitations in overcurrent protection due to the large size of battery protective boards, which reduces battery capacity and affects electronic device endurance.
Innovation Solution
A battery design incorporating dual connection circuits formed by a battery cell and a protective board with conductive portions and a connecting member, reducing the dimension of the protective board while enhancing overcurrent capability and increasing battery capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery protective board dimension is increased to enhance overcurrent protection capability, then the overcurrent protection effect is improved, but the battery capacity is reduced
Solution Approach 1:
The patent divides the single protection circuit into two separate protection circuits (first protection circuit and second protection circuit). Each circuit independently monitors and protects one battery terminal, allowing the protective board to achieve enhanced overcurrent protection capability while reducing the area required for a single large circuit, thereby increasing battery capacity.
2Reliability
If the battery protective board dimension is increased to achieve high overcurrent protection level, then the overcurrent protection effect is improved, but the electronic device endurance is affected
Solution Approach 1:
By segmenting the protection function into two separate circuits, each circuit can be optimized for its specific terminal protection task. This segmentation allows the protective board to provide high-level overcurrent protection while occupying less space, thereby preserving more battery capacity for longer device endurance.
3Reliability
If the battery protective board dimension is increased to enhance overcurrent protection, then the protection capability is improved, but the available battery space is reduced
Solution Approach 1:
The protective board is divided into two independent protection circuits, each handling one battery terminal. This segmentation reduces the required area for each individual circuit, allowing the overall protective board to occupy less battery space while maintaining enhanced overcurrent protection capability through the dual-circuit architecture.
Solution Approach 2:
The patent utilizes both the first surface and the second surface of the protective board for circuit layout. The first protection circuit is arranged on the first surface, while the second protection circuit is arranged on the second surface, effectively utilizing three-dimensional space to reduce the footprint on any single surface and increase available battery space.
Data Source
AI summary
A battery includes a battery cell, a battery protective board, and a connecting member. A second tab is connected to a first tab by sequentially passing through a second conductive portion, a connecting member, a first circuit, and a first conductive portion, to form a first connection circuit, and the first tab is connected to the second tab by sequentially passing through a first conductive portion, a second circuit, and a second conductive portion, to form a second connection circuit, and therefore, dual circuits in parallel are formed by the battery protective board and the battery cell, which not only reduces a magnitude of a current of a single circuit of a battery protective board, to enhance overcurrent capability of the battery protective board, but also reduces a dimension of a battery protective board, to increase an available dimension of a battery for accommodation, thus increasing capacity of a battery.