Stretchable Battery Heating Sheet for Cell Swelling
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Solution Overview
Problem
Existing heating apparatuses for batteries are incompatible with the thickness change caused by swelling of battery cells, leading to wrinkling and dry burning phenomena, which compromise the safety performance of batteries.
Innovation Solution
A heating apparatus comprising a stretchable heating sheet and an adapting component with multiple adapting bodies, allowing the apparatus to switch from an initial to a stretched state to accommodate the swelling of battery cells, thereby preventing wrinkling and dry burning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating apparatus is disposed inside a battery structure to heat the battery cell, then the heating need of the battery cell is satisfied, but the heating apparatus structure is incompatible with thickness change caused by swelling of the battery cell, leading to wrinkling and dry burning
Solution Approach 1:
The heating apparatus employs a dynamic structure where the heating film can stretch and expand when the battery cell swells. The connecting portions between adapting bodies are designed to break at predetermined positions, allowing the heating apparatus to transition from an initial state to a stretched state, maintaining compatibility with battery cell thickness changes and preventing wrinkling and dry burning
Solution Approach 2:
The adapting component is divided into multiple adapting bodies connected by connecting portions. This segmentation allows localized deformation and breaking at connecting portions, enabling the heating apparatus to adapt to battery swelling without compromising the overall heating function or safety
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
The solution ensures compatibility with the thickness change of swelling battery cells, preventing wrinkling and dry burning, and thus enhancing the safety performance of batteries.
Implementation Method 1
a heating sheet, configured to heat a battery cell
Data Source
AI summary
A heating apparatus, a battery, and an electric apparatus are provided. The heating apparatus includes: a heating sheet, configured to heat a battery cell, where the heating sheet is arranged in a stretchable manner in a length direction of the heating sheet; and an adapting component, configured to connect the heating sheet to the battery cell, where the adapting component includes at least two adapting bodies distributed along the length direction; the heating apparatus is able to be switched from an initial state to a stretched state; in the initial state, along the length direction, a length dimension of the heating sheet is a first dimension, and two adjacent adapting bodies are connected; and in a stretched state, along the length direction, the heating sheet is stretched and extended from the first dimension to the second dimension, and at least two adjacent adapting bodies are disconnected from each other.