Battery Pack Impact Relaxation Ribs
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Solution Overview
Problem
Existing battery packs for electric vehicles and bicycles face challenges in impact resistance, as external impacts can directly propagate to battery cells, leading to liquid leakage and damage, especially when a separate elastic member or buffer material is not used.
Innovation Solution
A battery pack design that integrates impact relaxation ribs between the outer circumference of the base unit and the battery cell storage units, allowing these ribs to transform and absorb impact, thereby reducing the force applied to the battery cells without the need for a separate buffer material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate elastic member or buffer material is inserted into the battery pack to absorb impact, then the impact resistance is improved, but the manufacturing cost increases and the number of manufacturing processes increases
Solution Approach 1:
The patent merges the impact absorption function into the cell holder structure by forming hollow chambers within the holder itself. This integration eliminates the need for separate buffer materials or elastic members, reducing component count while maintaining impact resistance. The hollow chambers are formed as integral parts of the cell holder during manufacturing, combining structural support and shock absorption functions in a single component.
Solution Approach 2:
The patent applies local quality by creating hollow chambers at specific locations within the cell holder where impact absorption is most needed. The chambers are strategically positioned to provide cushioning effect at critical impact zones while maintaining the overall structural integrity of the holder. This localized approach provides effective impact protection without adding complexity throughout the entire structure.
2Device complexity
If ribs are provided to attenuate impact without using an elastic member, then the manufacturing cost is reduced, but external impact is directly propagated to the battery cells through the ribs
Solution Approach 1:
The patent implements beforehand cushioning by pre-forming hollow chambers within the cell holder structure before battery cells are installed. These chambers are designed to collapse or deform upon impact, absorbing shock energy before it can be transmitted to the battery cells. The cushioning structure is already in place and ready to activate when impact occurs, providing proactive protection without requiring separate components.
Solution Approach 2:
The hollow chambers are designed with curved, three-dimensional geometries that allow for more effective energy absorption compared to simple linear ribs. The curved surfaces and volumetric structure of the chambers enable gradual deformation under impact loads, distributing and attenuating forces more effectively while maintaining structural strength.
3Quantity of substance
If the battery pack uses a heavy battery pack with large capacity, then the necessary battery capacity is achieved, but the battery pack becomes heavy and more susceptible to damage from drops
Solution Approach 1:
The patent combines the structural support function and impact absorption function into a single integrated cell holder component. This merger allows the holder to be optimized for both load-bearing capacity (to support heavy battery cells) and shock absorption (to protect against impact damage). The hollow chamber structure provides strength-to-weight ratio optimization, enabling the holder to support large capacity batteries while maintaining impact resistance.
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
This design enhances the impact resistance of the battery pack without increasing manufacturing costs or complexity, effectively preventing external impacts from being directly transmitted to the battery cells, thus preventing liquid leakage and improving overall durability.
Implementation Method 1
impact relaxation ribs, and is configured in a shape capable of being transformed in a direction to which impact is applied
Implementation Method 2
each of the impact relaxation ribs is formed between an outer circumference of the base unit and an exterior surface of each of the battery cell storage units, and is configured in a shape capable of being transformed in a direction to which impact is applied
Data Source
AI summary
A battery pack is provided. The battery pack including a plurality of battery cells; a cell holder including a peripheral wall and a plurality of cell storage units; and a plurality of ribs integrally molded with the cell holder between the peripheral wall of the cell holder and the cell storage unit.