Battery Box Cover Heating for Low-Temperature EV Batteries
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Solution Overview
Problem
Batteries, particularly those used in electric vehicles, face significant performance degradation and safety risks due to inadequate insulation during low-temperature operations, leading to reduced range and increased risk of lithium release.
Innovation Solution
A battery box equipped with a heating structure, including a conductive heating plate or a heating film, integrated into the box cover, which can be controlled to operate under low temperature conditions, thereby increasing the overall battery temperature and ensuring range and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If insulation measures are taken to keep the battery at suitable operating temperature, then the battery temperature is maintained, but the insulation effect is not ideal
Solution Approach 1:
The patent replaces traditional mechanical insulation structures with an active heating system. Instead of relying on passive insulation materials and structures, the invention uses heating films or heating plates integrated into the battery box to actively generate and distribute heat, ensuring reliable temperature maintenance in cold environments.
Solution Approach 2:
The patent changes the approach from maintaining temperature through insulation (passive parameter control) to actively heating the battery (active parameter control). By integrating heating elements directly into the battery box structure, the system dynamically adjusts temperature through controlled heating rather than relying on fixed insulation properties.
2Temperature
If a heating structure with large heating area is used, then heating uniformity is improved, but the space for battery cells is reduced
Solution Approach 1:
The patent merges the heating function with the battery box structure itself. Heating films are integrated into the inner surface of the box cover, and heating plates are incorporated as structural components of the box body. This integration allows the heating system to share space with the containment structure, achieving large heating area without proportionally reducing battery cell accommodation space.
Solution Approach 2:
The patent uses thin heating films with high flexibility that can be conformally attached to the inner surfaces of the battery box. These thin films provide extensive heating coverage area while occupying minimal volume, thus maintaining large battery cell accommodation space while achieving uniform heating across all battery surfaces.
3Device complexity
If the heating structure is integrated into the box cover, then the structure is more compact, but the connection complexity increases
Solution Approach 1:
The patent segments the heating system into modular components - heating films that can be separately attached to the box cover, and heating plates that can be independently installed in the box body. This segmentation allows each component to be manufactured and tested separately, then assembled into the final integrated structure, reducing overall manufacturing complexity while maintaining structural compactness.
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 proposed solution effectively addresses the insulation issues by uniformly heating the battery, enhancing its performance and safety, especially in winter conditions, while also optimizing space usage and reducing heat loss.
Implementation Method 1
a heating structure is provided on the box cover, and the heating structure includes at least one of a conductive heating plate or a heating film
Implementation Method 2
the box cover can be heated by controlling the heating structure to operate under low temperature conditions, then the heat is conducted to the inside of the battery box
Data Source
AI summary
A battery box, a battery, and an electrical apparatus. The battery box comprises a box cover and a box body, the box body and the box cover covering each other to jointly define an accommodating cavity. A heating structure is provided on the box cover, and the heating structure includes at least one of a conductive heating plate or a heating film.