Battery Module Side-Plate Clamping Against Expansion Displacement
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Solution Overview
Problem
The connection between adjacent battery modules is prone to failure due to expansion forces, leading to potential safety hazards from displacement under external forces.
Innovation Solution
The use of clamping protrusions and grooves on side plates to connect adjacent battery modules, limiting their movement and ensuring stability through clamping and bonding mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are stacked to form battery modules to increase capacity, then the battery capacity is improved, but the connection between adjacent battery modules fails under expansion forces
Solution Approach 1:
The side plates are designed with dynamic deformation capability to accommodate battery cell expansion. The plates can elastically deform under expansion forces and then recover, maintaining continuous contact and connection between battery modules throughout the expansion cycle, thus preventing connection failure while preserving capacity increases.
Solution Approach 2:
The side plates are designed with specific material parameters (elastic modulus, yield strength) and geometric parameters (thickness, dimensions) that allow them to undergo controlled deformation within a specific range. This parameter optimization enables the plates to absorb expansion forces through elastic deformation while maintaining structural integrity and connection reliability.
2Strength
If welding or bonding methods are used to connect side plates, then the connection strength is improved, but the connection fails when side plates deform under expansion forces
Solution Approach 1:
The side plates utilize their own elastic deformation capability as a self-service mechanism to maintain connection. Rather than relying on external welding or bonding that fails during deformation, the plates themselves deform elastically to accommodate expansion while maintaining contact, making the connection inherently adaptive and reliable under varying conditions.
Solution Approach 2:
The connection system transitions from a static rigid connection (welding/bonding) to a dynamic elastic connection. The side plates continuously adapt their shape through elastic deformation in response to expansion forces, maintaining reliable connection without the brittleness of welded or bonded joints that fail under deformation.
3Reliability
If clamping protrusions and grooves are used to connect side plates, then the connection reliability under deformation is improved, but the device complexity increases
Solution Approach 1:
The side plates are segmented with localized clamping protrusions and corresponding grooves at critical connection points rather than requiring complex overall structures. This segmentation approach provides targeted reinforcement where expansion forces act most strongly, improving reliability without proportionally increasing overall structural complexity.
Solution Approach 2:
The clamping protrusions and grooves are strategically positioned at local areas where connection reliability is most critical, rather than uniformly distributing complexity throughout the entire side plate structure. This local quality enhancement provides maximum reliability improvement with minimal increase in overall device complexity.
Data Source
AI summary
A battery includes a plurality of battery modules arranged in sequence in a first direction. Each battery module includes battery cells and side plates arranged on both sides of the battery cells in the first direction, and the side plates of two adjacent battery modules are connected to each other. In the two connected side plates, one side plate is provided with a clamping protrusion, and the other side plate has a clamping groove, and the clamping protrusion is clamped in the clamping groove to prevent relative movement between the two connected side plates in a second direction. The second direction is perpendicular to the first direction.