Segmented Battery Heating Film for Fault-Tolerant Low-Temperature Heating
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Solution Overview
Problem
Existing heating films for batteries fail to provide consistent heat in low temperature environments due to damage or aging, leading to reduced performance and potential failure.
Innovation Solution
A heating film design with a plurality of sub heating regions arranged at intervals, forming independent circuit loops, and an electrode layer electrically connected to these regions, ensuring that damage to one sub heating region does not affect others, along with protective layers for insulation and bonding, using materials like graphene and polyimide for high thermal conductivity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single heating layer is used in the heating film, then the structure is simple, but the heating film is prone to failure when damaged
Solution Approach 1:
The heating layer is divided into multiple independent sub-heating regions (first sub-heating region, second sub-heating region, etc.), each capable of functioning independently. This segmentation ensures that damage to one region does not affect the others, thereby improving reliability while maintaining structural simplicity through modular design.
Solution Approach 2:
Different sub-heating regions are positioned at specific locations (first, second, third sub-heating regions) with potentially different heating characteristics. This allows localized heating optimization where each region can be tailored to specific thermal requirements, improving overall system reliability through distributed functionality.
2Area of stationary object
If sub heating regions are arranged closely together, then the heating coverage is improved, but the thermal efficiency and safety are reduced
Solution Approach 1:
The heating layer is segmented into multiple sub-heating regions with intervals between them. This segmentation provides both heating coverage and safety margins, allowing heat distribution across the battery while maintaining safe spacing to prevent thermal runaway propagation.
Solution Approach 2:
Sub-heating regions are positioned at specific locations (first, second, third sub-heating regions) to optimize local heating effectiveness. The interval distances are carefully designed to ensure adequate heat coverage while maintaining safety margins between regions.
3Reliability
If the heating film lacks protective layers, then the manufacturing process is simpler, but the insulation and bonding performance are insufficient
Solution Approach 1:
The heating film is enclosed within a protective layer structure that provides insulation and bonding functionality. The protective layers are designed as thin film structures that wrap around the heating elements, providing necessary protection while maintaining flexibility for manufacturing and application.
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
This design enhances the service life of the heating film, reduces the risk of failure, and maintains normal heating functionality even if individual sub heating regions are damaged, while improving thermal efficiency and safety.
Implementation Method 1
the heating layer includes a plurality of sub heating regions arranged at intervals, and the electrode layer is electrically connected to the plurality of sub heating regions to form a parallel heating loop
Implementation Method 2
the material of the sub heating region includes graphene; and/or, the material of the first protective layer includes at least one of polyimide and polyethylene
Data Source
AI summary
Embodiments of the present application provide an electrical apparatus, a battery, a heating film and a manufacturing method and a manufacturing device thereof. The heating film may include a first protective layer, a second protective layer, and a heating layer and an electrode layer arranged in a stacked manner between the first protective layer and the second protective layer. The heating layer may include a plurality of sub heating regions arranged at intervals, and the electrode layer may be electrically connected to the plurality of sub heating regions to form a parallel heating loop.