Battery Pack Case Partition Structure for Module Swelling Control
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Solution Overview
Problem
Existing battery modules are prone to swelling phenomena during charging or discharging, which can affect adjacent modules due to the lack of effective fixation of the module frame, leading to potential deformation and instability.
Innovation Solution
A battery pack structure featuring a pack case with detachable auxiliary partition walls and reinforcement plates that securely fasten the battery module using bolts, providing robust support to the side surfaces and minimizing swelling by preventing expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery modules are arranged in a battery pack, then battery capacity is achieved, but deformation occurs during assembly and battery contact resistance increases
Solution Approach 1:
The battery pack is divided into multiple battery modules, each containing multiple battery cells. This segmentation allows for better distribution and management of the batteries, reducing deformation during assembly and maintaining low contact resistance across all connections.
Solution Approach 2:
Different regions of the battery pack are designed with different structural characteristics. The first and second battery modules have optimized local structures at their opposing ends to reduce deformation, while connection regions are specifically designed to minimize contact resistance.
2Quantity of substance
If battery modules are tightly arranged to increase capacity, then space utilization improves, but deformation during assembly increases
Solution Approach 1:
The battery pack is segmented into multiple modules that can be independently arranged and managed. This allows for optimized space utilization while maintaining structural stability through modular design.
Solution Approach 2:
Deformation prevention structures are designed in advance at the opposing ends of battery modules. These structures provide cushioning and support during assembly to prevent deformation before it occurs, allowing tight arrangement without compromising stability.
3Ease of manufacture
If battery pack structure is simplified for ease of manufacture, then manufacturing cost decreases, but heat dissipation performance worsens
Solution Approach 1:
The battery module structure integrates both structural support and heat dissipation functions into a unified design. The module housing and internal structures serve dual purposes, providing mechanical strength while facilitating thermal management, thus maintaining ease of manufacture without compromising heat dissipation.
Solution Approach 2:
The battery module design incorporates multi-functional elements that simultaneously provide structural support, heat dissipation, and deformation prevention. This universal design approach simplifies manufacturing by reducing the number of separate components while maintaining effective heat dissipation performance.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Discussed is a pack case including a module area where a cell stack is placed, wherein the pack case includes a base plate that supports a lower portion of the cell stack, a main partition wall extending across the base plate and perpendicularly coupled to a central portion of the base plate, a side wall perpendicularly coupled to an edge of the base plate along a perimeter of the base plate, and an auxiliary partition wall of which opposite ends are coupled to the main partition wall and the side wall, respectively, and which includes a pair of reinforcement plates coupled to each other, and a reinforcement plate of the pair of reinforcement plates includes a plurality of reinforcement ribs protruding and extending in a longitudinal direction of the reinforcement plate.