Battery End Plate Venting for Smooth Gas Exhaust
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Solution Overview
Problem
Existing battery designs face challenges in maintaining exhaust smoothness and safety due to reduced space utilization, leading to potential damage from high-temperature and high-pressure gas retention, which affects energy density and overall safety.
Innovation Solution
Incorporating a guide passage on the end plate that connects the accommodating cavity with the exhaust port, ensuring timely discharge of gases and preventing gas retention, while maintaining structural integrity and energy density by not occupying additional space within the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If space utilization in the box body is improved to increase energy density, then energy density is improved, but exhaust smoothness deteriorates due to gas retention
Solution Approach 1:
The exhaust function is segmented from the box body wall and integrated into the end plate structure. The guide passage provides a dedicated, controlled exhaust pathway that is separate from the battery cell arrangement, allowing efficient gas discharge without compromising the compact battery layout. This segmentation enables the exhaust system to function independently while maintaining high space utilization.
Solution Approach 2:
The exhaust port is repositioned from the box body side wall to the end plate, utilizing the third dimension (depth/thickness direction) rather than occupying lateral space. The guide passage extends in the thickness direction of the end plate, creating a vertical exhaust pathway that does not interfere with the horizontal arrangement of battery cells, thus maintaining high space utilization while ensuring smooth exhaust.
2Quantity of substance
If the guide passage is integrated into the end plate, then space utilization is maintained, but device complexity increases
Solution Approach 1:
The guide passage is merged with the end plate structure, forming an integrated component rather than a separate assembly. The exhaust port, guide passage, and end plate are combined into a single structural unit, reducing the number of parts and simplifying manufacturing. This merging maintains space utilization while the integrated design actually reduces overall structural complexity compared to separate components.
Solution Approach 2:
The end plate serves multiple functions: it seals the battery cell group, provides structural support, and incorporates the exhaust function through the guide passage and exhaust port. This multi-functionality eliminates the need for separate exhaust components, reducing device complexity while maintaining effective exhaust capability and high space utilization.
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 solution enhances exhaust smoothness and safety by facilitating the directional discharge of gases, reducing the risk of component damage and improving the battery's energy density and user safety.
Implementation Method 1
the guide passage is used for communicating the accommodating cavity with the exhaust port... the guide passage can guide gas generated in the battery, and the gas generated in the battery is enabled to arrive at the exhaust port of the box body along the guide passage
Data Source
AI summary
A battery includes: a box body, including a side wall for forming an accommodating cavity by enclosing, where the side wall has an exhaust port; a battery cell group, disposed inside the accommodating cavity and including a plurality of battery cells, where the plurality of battery cells are stacked; and an end plate, disposed inside the accommodating cavity and located between the battery cell group and the side wall, where the end plate covers the exhaust port, the end plate is provided with a guide passage, and the guide passage is used for connecting the accommodating cavity and the exhaust port.