Battery Cell Support Structure for Safe Pressure Relief Venting
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Solution Overview
Problem
Existing battery designs face challenges in ensuring safety, particularly in preventing thermal runaway and maintaining structural stability under impact, due to insufficient support and structural strength of the pressure relief mechanisms.
Innovation Solution
A battery design incorporating a support component with a reinforcing structure that enhances structural strength and includes a pressure relief mechanism to discharge emissions, preventing thermal runaway and ensuring structural stability by allowing emissions to be discharged safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional battery structure with a single electrode assembly is used, then the battery has a simple structure and is easy to manufacture, but the battery capacity is limited and cannot meet high energy demand
Solution Approach 1:
The battery is divided into multiple electrode assemblies (first, second, third electrode assemblies) arranged in parallel, with each assembly contributing to the total capacity. This segmentation allows the battery to achieve higher capacity while maintaining a manageable structural complexity through modular design.
2Quantity of substance
If multiple electrode assemblies are arranged in parallel to increase capacity, then the battery capacity increases, but the internal stress during charging and discharging becomes uneven causing deformation
Solution Approach 1:
Different electrode assemblies are positioned at different locations within the battery case, with specific arrangements designed to distribute stress evenly. The first electrode assembly is arranged in a first region, the second in a second region, and the third in a third region, creating localized stress distribution that prevents overall deformation.
Solution Approach 2:
The electrode assemblies are arranged in different spatial regions and orientations within the battery case, utilizing three-dimensional space to distribute mechanical stress across multiple dimensions. This spatial arrangement prevents stress concentration in any single direction.
3Quantity of substance
If electrode assemblies are tightly packed to increase energy density, then the battery capacity per volume increases, but the heat dissipation becomes insufficient leading to overheating
Solution Approach 1:
A battery case is introduced as an intermediary structure that houses the electrode assemblies and provides thermal management functionality. The case includes heat dissipation structures that facilitate heat transfer from the electrode assemblies to the external environment, enabling effective heat dissipation while maintaining high energy density.
Data Source
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AI summary
Embodiments of the present application provides a battery (10) and an electrical device. The battery (10) includes: a box (11) including an electrical chamber (11a); a battery cell (20) accommodated in the electrical chamber (11a), a pressure relief mechanism (213) being disposed on a first wall (21) of the battery cell (20); and a support component (13) attached to the first wall (21), the support component (13) being configured so that emissions of the battery cell (20) pass through the support component (13) to be discharged out of the electrical chamber (11a) when the pressure relief mechanism (213) is actuated, and the support component (13) being provided with a reinforcing structure (14). The technical solutions of the present application can improve safety performance of the battery (10).