Battery Module Partition and Adhesive Block for Thermal Spread
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Solution Overview
Problem
Existing battery modules face safety issues due to thermal runaway in one battery cell stacking body affecting adjoining cells, leading to potential safety accidents.
Innovation Solution
A battery module design featuring a partition separating adjoining cells, with an adhesive block covering the tab side of each cell to block openings and form part of the outer sidewall, providing thermal insulation and flame retardation, while eliminating the need for a separate end plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple battery cell stacking bodies are stacked and arranged in the shell, then the battery module can meet usage demands, but thermal runaway in one cell may affect adjoining cells, reducing safety performance
Solution Approach 1:
The battery module divides the battery cells into independent compartments using partitions. Each battery cell stacking body is separated from adjoining cells by partition walls, creating isolated segments. This segmentation prevents thermal runaway in one cell from affecting adjacent cells, thereby maintaining safety performance while allowing multiple cells to be arranged in the shell.
Solution Approach 2:
The partition acts as an intermediary structure between battery cell stacking bodies. It provides thermal isolation and physical separation, serving as a mediator that prevents direct thermal transfer and chemical interaction between adjacent cells during normal operation and thermal runaway events.
2Reliability
If an adhesive block is used to block the opening and cover the tab side, then thermal insulation and flame retardation are improved, but the structure becomes more complex
Solution Approach 1:
The adhesive block serves multiple functions simultaneously: it blocks the opening of the shell, covers the tab side of the battery cell, provides thermal insulation, and acts as a flame retardant barrier. By merging these multiple functions into a single component, the structure remains relatively simple while achieving comprehensive safety performance.
Solution Approach 2:
The adhesive block is designed as a multi-functional component that performs opening blocking, tab side coverage, thermal insulation, and flame retardation. This universal component approach reduces the need for separate parts and simplifies the overall structure while maintaining high reliability.
3Reliability
If a separate end plate is used to block the opening, then the opening is properly sealed, but the number of parts increases and cost increases
Solution Approach 1:
The adhesive block combines the functions of opening blocking and tab side coverage that would traditionally require separate components. By merging the end plate function and tab cover function into a single adhesive block, the number of parts is reduced and assembly is simplified while maintaining proper sealing.
Solution Approach 2:
The adhesive block serves as a universal component that performs multiple sealing and protective functions. It seals the opening while simultaneously covering and protecting the tab side, eliminating the need for separate end plates and tab covers, thereby reducing part count and cost.
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 design reduces the risk of thermal spread and improves safety performance by isolating cells during thermal runaway, simplifies assembly, and lowers costs by integrating the adhesive block as part of the sidewall.
Implementation Method 1
an adhesive block, filled in the opening to block the opening and cover the tab side of the battery cell stacking body
Implementation Method 2
an adhesive block, filled in the opening to block the opening and cover the tab side of the battery cell stacking body, where an outer sidewall of the adhesive block forms a part of an outer sidewall of the battery module
Data Source
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AI summary
Disclosed are a battery module and a battery pack. The battery module includes: a shell (1), having an opening; multiple battery cell stacking bodies (2), having a tab side, and are stacked and arranged in the shell (1); a partition (5), disposed on the shell (1), and separating adjacent two battery cell stacking bodies (2); and an adhesive block (3), filled in the opening to block the opening and cover the tab side of the battery cell stacking body (2). The partition (5) may reduce the influence on adjacent battery cell stacking bodies (2) when the battery cell stacking body (2) loses control, lowering the risk of thermal spread. The adhesive block (3) has effects of heat insulation and flame retardation. The adhesive block (3) blocks the opening, ensuring structural strength and product performance without the need to separately dispose the end plate to block the opening.