Battery Cell Holder Guiding Device for Volume Change Management
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Solution Overview
Problem
Existing cell holders for battery cells, particularly pouch cells, face challenges in protecting the cells from mechanical stress due to volume changes during charging and aging, leading to potential damage from pressure buildup and overheating, and require additional mechanical support to manage these changes effectively.
Innovation Solution
A cell holder with a guiding device that allows relative movement between the cell holder and the module frame, incorporating a metal insert for secure tab connection, a dovetail guide for precise positioning, and a metal component for heat dissipation, along with optional heating elements to manage temperature, enabling secure interconnection and efficient cooling of battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cell holder is rigidly fixed to the module frame, then the mechanical stability and positioning precision are improved, but the battery cell is subjected to high mechanical stress during volume changes leading to potential damage
Solution Approach 1:
The cell holder is designed with a guiding device that enables dynamic relative movement between the cell holder and the module frame. This dynamic capability allows the cell holder to move independently in response to battery cell volume changes during charging and aging, thereby accommodating expansion and contraction without transmitting excessive mechanical stress to the cell while maintaining stable positioning through the guide structure.
2Object-affected harmful factors
If the cell holder allows relative movement to reduce mechanical stress, then the protection of battery cells is improved, but the positioning precision and structural stability are reduced
Solution Approach 1:
The guiding device acts as an intermediary mechanism between the rigid module frame and the flexible cell holder. It provides controlled degrees of freedom that allow necessary movement to accommodate cell volume changes while maintaining precise positioning through guide rails or similar structures, thus mediating between the requirements for movement and positioning precision.
3Reliability
If additional support structures are added to manage volume changes, then the protection of battery cells is improved, but the device complexity increases
Solution Approach 1:
The cell holder is designed as a multi-functional component that simultaneously provides mechanical support, guided movement capability, and protection against mechanical stress. The guiding device integrates positioning and movement accommodation functions into a single structure, avoiding the need for separate complex support mechanisms while maintaining reliable cell protection.
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 solution effectively reduces mechanical stress on battery cells during volume changes, prevents overheating, and ensures secure interconnection, thereby extending the lifespan and improving the operational efficiency of battery cells by allowing for volume adjustment and heat management.
Implementation Method 1
a volume change of a battery cell received in the intake is enabled... enable a change of volume of the battery cells over their lifecycle or over their charging cycle
Implementation Method 2
a metal component for heat dissipation
Data Source
AI summary
A cell holder for a battery cell includes an intake in which the battery cell is receivable. The cell holder is stackable with additional cell holders in a module frame in which a battery that has a plurality of battery cells is receivable. The cell holder is guidable in the module frame relative to the module frame by a guiding device.