Battery Module Reinforcement Structure for Vibration Resistance
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Solution Overview
Problem
Lithium secondary battery modules experience deformation and damage due to vibrations and external impacts, particularly in the central part where multiple batteries are located, leading to reduced durability and potential damage to internal components.
Innovation Solution
A battery module with a reinforcement member fixed to the module case's cover and bottom portions, using an adhesive member to secure it, and having a plate shape extending horizontally with curved protrusions to stabilize the module case, reducing deformation and enhancing mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the module case is made of electrically insulating plastic material, then electrical insulation is improved, but mechanical strength and resistance to vibration/impact deteriorate
Solution Approach 1:
The module case is constructed as a composite structure combining an outer case body made of electrically insulating plastic material with an inner reinforcement member made of high-strength metal material. This composite design allows the plastic outer case to provide electrical insulation while the metal reinforcement member provides mechanical strength and vibration resistance, resolving the contradiction between electrical insulation and mechanical strength.
2Quantity of substance
If multiple secondary batteries are arranged in the module case, then battery capacity is improved, but deformation and damage risk in the central part increases
Solution Approach 1:
The reinforcement member is strategically positioned in the central part of the module case where multiple secondary batteries are arranged. This localized reinforcement provides additional structural support specifically in the area most susceptible to deformation from battery weight, allowing high battery capacity while maintaining structural stability in the critical central region.
3Strength
If the outermost area of the module case is fixed using bolts, then fixation at edges is improved, but the central part becomes weaker and deforms more
Solution Approach 1:
The reinforcement member is extracted as a separate internal component and placed within the module case, independent of the bolt fixation system at the outermost areas. This internal reinforcement specifically addresses the central part weakness without interfering with the edge fixation method, providing targeted support to the vulnerable central region while maintaining the simplicity of edge bolt fixation.
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 reinforcement member effectively prevents deformation and damage from vibrations and impacts, allowing for a larger capacity battery module with increased energy density and reduced manufacturing costs by maintaining the module's structural integrity.
Implementation Method 1
an adhesive member to secure it
Data Source
AI summary
Disclosed is a battery module having a reinforcement member to reinforce the mechanical strength of a module case. To achieve the above-described object, the battery module according to the present disclosure includes a plurality of secondary batteries arranged in at least one direction, a module case including a cover portion, a bottom portion, and a side portion to define an internal space in which the plurality of secondary batteries is disposed, and a reinforcement member disposed in the module case and fixed to a lower surface of the cover portion and an upper surface of the bottom portion.