Battery Module Cover With Heat-Resistant Member
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Solution Overview
Problem
High-power battery modules with non-aqueous electrolytes face challenges in managing high-temperature gases generated during electrochemical reactions, leading to potential damage and gas leakage due to insufficient heat resistance and sealing.
Innovation Solution
A battery module design featuring a hexahedral cover with internal ribs and a heat-resistant member, combined with an insulation gasket, which forms a gas flow path and provides enhanced sealing and heat resistance to prevent damage from high-temperature gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cover is used over vent portions, then the structure is simple and easy to manufacture, but the cover cannot withstand high-temperature gases and suffers damage leading to gas leakage
Solution Approach 1:
The cover is constructed using composite materials including a heat-resistant member (such as heat-resistant tape, insulation coated metal plate, or heat-resistance paint) applied on the inner surface. This composite structure enables the cover to withstand high-temperature gases (100°C to 700°C) while maintaining structural integrity, preventing damage and gas leakage that would occur with conventional single-material covers
Solution Approach 2:
The heat-resistant member is selectively applied to specific portions of the cover's inner surface, particularly at locations corresponding to the vent portions where high-temperature gases are discharged. This localized application provides targeted heat resistance where most needed, while keeping other areas of the cover simpler and easier to manufacture
2Reliability
If no insulation member is used between vent portions and cover, then the structure is simpler, but high-temperature gases directly contact the cover causing damage and leakage
Solution Approach 1:
An insulation member is introduced as an intermediary component positioned between the vent portions and the cover. This insulation member acts as a protective barrier that prevents direct contact between high-temperature gases discharged from vent portions and the cover, thereby protecting the cover from thermal damage and maintaining sealing performance to prevent gas leakage
3Reliability
If the cover fully encloses vent portions, then sealing is improved, but high-temperature gases trapped inside damage the cover and cause leakage
Solution Approach 1:
The heat-resistant member is selectively applied to specific portions of the cover's inner surface, particularly at locations corresponding to the vent portions where high-temperature gases are discharged. This localized application provides targeted heat resistance where most needed, while keeping other areas of the cover simpler and easier to manufacture
Solution Approach 2:
The heat-resistant member serves as a protective intermediary layer between the high-temperature gases and the cover material. This intermediate layer absorbs or reflects thermal energy, preventing the cover from reaching temperatures that would cause material degradation, structural damage, and subsequent gas leakage
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 effectively controls and contains high-temperature gases, preventing damage to the battery module and ensuring a tighter seal, thereby improving safety and productivity by minimizing gas leakage.
Implementation Method 1
The heat-resistance member may be configured to withstand a high temperature of about 100° C. to about 700° C.
Implementation Method 2
an insulation member interposed between the vent portions and the cover
Data Source
AI summary
A battery module including a plurality of battery cells and a cover, each battery cell having a vent portion aligned in one direction, and the cover being over the vent portions, the cover including an internal cavity and at least a portion of the internal cavity including a heat-resistance member.