Battery Module Frame Structure for Cell Swelling and Heat Dissipation
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Solution Overview
Problem
Conventional battery modules face challenges in managing cell swelling and rigidity issues due to limited compression and welding points, leading to inefficient heat dissipation and reduced structural integrity.
Innovation Solution
A battery module design featuring a shaping structure with a module frame having unit housing sections, a shaping part, and a connection part that connects side surface parts, along with a compression pad to manage cell swelling and enhance rigidity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a compression pad is used to manage cell swelling, then cell swelling is absorbed, but the compression pad reaches a minimum compression thickness and cannot flexibly cope with further swelling
Solution Approach 1:
The patent transforms the static compression pad into a dynamic system by introducing a movable pressing member that can adjust its position along the compression direction. This pressing member is driven by a driving mechanism (such as a motor or actuator) to dynamically adjust the compression force applied to battery cells, enabling continuous adaptation to cell swelling without reaching a minimum compression thickness limit.
Solution Approach 2:
The system incorporates sensors that detect battery cell swelling status and automatically control the pressing member's movement and compression force. This self-regulating mechanism allows the compression system to autonomously adapt to cell swelling conditions, eliminating the need for manual adjustment and preventing the compression pad from reaching its minimum effective thickness.
2Ease of manufacture
If welding points are limited to both left and right side surfaces, then manufacturing is simplified, but rigidity is lowered
Solution Approach 1:
The patent divides the upper plate into multiple separate welding sections rather than a single continuous plate. These segmented upper plates are independently welded to the module frame at multiple discrete locations, including front and rear surfaces. This segmentation allows for simplified manufacturing of individual components while achieving enhanced overall rigidity through distributed welding points.
Solution Approach 2:
The patent extends welding operations from only the lateral sides to include the front and rear surfaces of the module frame, effectively utilizing three-dimensional space for welding. This multi-surface welding approach increases the number of welding points and improves rigidity without significantly complicating the manufacturing process, as each surface can be welded independently.
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 shaping structure facilitates heat dissipation, absorbs cell swelling, and improves rigidity by increasing welding points, thereby reducing temperature deviations and enhancing structural stability.
Implementation Method 1
a compression pad located between the shaping part and an outermost battery cell of the battery cell stack in the respective unit housing section
Implementation Method 2
a thermal conductive resin layer located between the battery cell stack and the bottom part of the module frame
Data Source
AI summary
A battery module includes a plurality of battery cell stacks, a module frame having unit housing sections in which the plurality of battery cell stacks are housed, respectively, and a shaping part formed between the unit housing sections.