Reinforced Battery Pack End Plate Structure for Cell Swelling
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Solution Overview
Problem
Existing battery packs face challenges in preventing swelling of battery cells due to electrolyte evaporation, which requires improved end plates to enhance structural integrity.
Innovation Solution
The battery pack incorporates end plates with extension spaces and reinforcement members inserted into these spaces, providing enhanced structural support and preventing battery cell swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end plates are provided on opposite sides of the battery module to prevent swelling, then battery cell swelling is prevented, but the structural strength of the end plates themselves is insufficient
Solution Approach 1:
The end plate is constructed as a composite structure combining a base end plate material with reinforcement members made of different material properties. The reinforcement members are embedded within the end plate structure to create a composite component that leverages the strengths of multiple materials to simultaneously achieve swelling prevention and structural strength.
Solution Approach 2:
The end plate is divided into functional segments: the base end plate structure and separately inserted reinforcement members. This segmentation allows the reinforcement members to be positioned strategically within extension spaces of the end plate to provide targeted structural support where needed most for preventing deformation while maintaining the overall swelling prevention function.
2Ease of manufacture
If the end plate structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but the structural integrity and strength of the end plate deteriorates
Solution Approach 1:
The manufacturing process is segmented into separate steps: first manufacturing the base end plate with extension spaces, then separately manufacturing reinforcement members, and finally assembling them together. This segmentation allows each component to be optimized for its specific manufacturing process while maintaining overall structural integrity through the assembly of pre-manufactured components.
Solution Approach 2:
The reinforcement members act as intermediary elements that are inserted into the end plate structure. This intermediary approach allows the base end plate to be manufactured independently with its swelling prevention function, while the reinforcement members are added as separate components to provide the necessary structural strength without complicating the base manufacturing process.
Data Source
AI summary
A battery pack includes a battery module, an end plate located on one side of the battery module in a first direction, that presses the battery module, and defining an extension space extending a second direction crossing the first direction in an interior thereof, and a reinforcement member extending in the second direction, and into which the extension space is inserted.