Dual Bare Cell Battery Layout for Piercing Short-Circuit Safety
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Solution Overview
Problem
High-capacity batteries used in electronic devices face a higher risk of internal short-circuit and burning due to piercing by foreign objects, compromising safety.
Innovation Solution
The battery is divided into two bare cell portions, a high-energy and a fast-charge portion, with independent operation and separate charge/discharge circuits, reducing the risk of simultaneous short-circuit and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery capacity is increased to meet electricity quantity requirements, then the power supply capability is improved, but the risk of internal short-circuit and burning increases
Solution Approach 1:
The battery is divided into a first bare cell portion and a second bare cell portion with different capacities and functions. The first bare cell portion has higher capacity for extended power supply, while the second bare cell portion has lower capacity and higher safety characteristics. This segmentation allows the battery to achieve both high capacity and improved safety by isolating the high-capacity portion from direct exposure to external hazards.
2Quantity of substance
If a single high-capacity bare cell portion is used, then the total capacity is achieved, but the safety risk from foreign object piercing increases
Solution Approach 1:
The second bare cell portion is positioned to overlap with the first bare cell portion in the orthographic projection, creating a protective barrier before external hazards can reach the high-capacity first bare cell portion. This prior cushioning arrangement ensures that even if foreign objects penetrate the battery housing, they encounter the second bare cell portion first, reducing the likelihood of direct damage to the high-capacity portion.
3Ease of operation
If the first bare cell portion is positioned exposed to the battery compartment opening, then ease of installation is improved, but vulnerability to foreign objects increases
Solution Approach 1:
The battery is segmented into two bare cell portions with distinct functional roles. The first bare cell portion can be positioned for easy installation while the second bare cell portion serves as a protective layer. This segmentation allows the high-capacity first portion to be optimally positioned for installation while the second portion compensates for the increased exposure risk.
Data Source
AI summary
A battery and an electronic device are disclosed. The battery includes: a first bare cell portion and a second bare cell portion. The first bare cell portion has a first surface and a side surface connected to the first surface, the first surface is configured to face towards a same direction as that of an opening of a battery compartment of an electronic device when the battery is installed in the battery compartment, and the side face is configured to face towards an inner side surface of the battery compartment of the electronic device when the battery is installed in the battery compartment. The second bare cell portion is located on a side that the first surface faces, and an orthographic projection of the second bare cell portion on the first surface overlaps the first surface.