Battery Module Elastic Support Bars Absorb Swelling Load
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Solution Overview
Problem
Existing battery modules for vehicles fail to maintain a constant surface pressure on battery cells when swelling occurs due to charge/discharge or deterioration, leading to reduced capacity.
Innovation Solution
A battery module design featuring elastic support bars that connect end plates to absorb the load generated during swelling, with a movable second end plate and a compressed elastic body to maintain initial surface pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant pressure structure is applied to battery cells using end plates and support bars, then the battery cell output and life are improved, but when cell swelling occurs, excessive pressure is applied to the battery cell reducing its capacity
Solution Approach 1:
The support bar is designed with a movable second end plate instead of being fixed, allowing the structure to dynamically adjust its position in response to battery cell swelling. This dynamic configuration enables the support bar to absorb expansion forces through movement rather than transmitting excessive pressure to the battery cell, while still maintaining adequate contact pressure for optimal performance during normal operation.
Solution Approach 2:
The invention changes the physical state of the support bar system from a rigid fixed connection to a movable connection, altering how force is transmitted. The movable second end plate allows the system to accommodate volume changes in the battery cell by changing its position parameter, thereby adjusting the pressure applied to the cell based on its expansion state.
2Stability of the object's composition
If rigid support bars are used to maintain constant pressure on battery cells, then structural stability is improved, but the ability to absorb swelling load is reduced
Solution Approach 1:
The support bar system incorporates a movable second end plate that can shift position along the support bar, transforming the rigid structure into a semi-dynamic system. This allows the structure to maintain stability during normal operation while adapting its configuration to absorb swelling loads, combining both structural integrity and adaptability.
Solution Approach 2:
The movable second end plate acts as an intermediary element between the fixed first end plate and the battery cell. It mediates the force transmission by absorbing swelling loads through its movement, protecting the battery cell from excessive pressure while maintaining the overall structural stability provided by the fixed end plate and support bar.
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 effectively absorbs the load caused by swelling, maintaining the initial surface pressure and enhancing the life and durability of battery cells.
Implementation Method 1
The one or more support bars include an elastic body, and absorb a load generated when the plurality of battery cells is swollen
Data Source
AI summary
A battery module for a vehicle includes: a plurality of battery cells which are stacked; a first end plate located on an outer surface of the battery cell located on one outermost side among the plurality of battery cells; a second end plate located on an outer surface of the battery cell located on the other outermost side among the plurality of battery cells; and one or more support bars located between the first and second end plates. The one or more support bars connect the first and second end plates to each other, include an elastic body, and absorb a load generated when the plurality of battery cells is swollen.