Battery Module Seating Structure for Impact Resistance and Weld Stability
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Solution Overview
Problem
Conventional battery modules lack sufficient rigidity and are prone to noise generation due to inadequate structural support and poor weld quality, especially under external impacts like shaking or pressing.
Innovation Solution
A battery module design featuring a frame unit with spaced-apart quadrangular frames, seating portions, and ribs that provide surface-contact support for leads and the battery management unit (BMU), enhancing weld quality and reducing noise by increasing the tight contact area and overall rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a linear frame structure is used, then the device complexity is reduced, but the rigidity of the frame is insufficient when external impact is applied
Solution Approach 1:
The frame is divided into multiple segments including a first frame and a second frame that are spaced apart from each other. This segmentation allows each frame segment to provide localized support while maintaining overall structural integrity, resolving the contradiction between simplicity and rigidity
Solution Approach 2:
The invention transitions from a single-plane linear structure to a three-dimensional arrangement by spacing the first and second frames apart. This dimensional change creates a more rigid spatial structure that resists external impacts while maintaining manufacturing simplicity
2Object-generated harmful factors
If the protection circuit module is loosely supported, then the ease of manufacture is improved, but frictional noise is generated due to pressing or shaking during use
Solution Approach 1:
Seating portions are pre-formed on the frame during frame fabrication, providing ready-made support structures for the protection circuit module. This preliminary action eliminates the need for additional assembly steps to create support structures, thus reducing noise without complicating manufacturing
Solution Approach 2:
The frame structure itself provides the support function through its integrated seating portions, rather than requiring separate support components. This self-service approach reduces the number of parts and assembly steps while effectively preventing frictional noise
3Manufacturing precision
If the battery cells are densely packed, then the productivity is improved, but the weld quality deteriorates when slight vibration or impact occurs during welding
Solution Approach 1:
The seating portions provide localized support specifically at the welding locations where leads connect to the protection circuit module. This localized quality enhancement ensures stable support and high weld quality at critical areas without requiring changes to the overall dense packing arrangement of battery cells
Data Source
AI summary
The present invention relates to a battery module having a planar seating portion, and more particularly to a battery module having a planar seating portion including, a frame unit having a rectangular structure in which an upper surface and a lower surface of the frame unit are open; a first cover protecting one surface of the frame unit; a second cover protecting another surface of the frame unit; two battery cells received in the frame unit; and a BMU electrically connected to the two battery cells, wherein the frame unit includes a frame body including a first frame and a second frame spaced apart from each other each of the first and second frames having a quadrangular contour, and a seating portion located in the middle of the frame body such that the BMU is located between the two battery cells, an upper surface of the seating portion being flat.