Battery Pack Impact Attenuation Structure for Compact Module Protection
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Solution Overview
Problem
Conventional battery packs cannot completely protect battery modules from external impacts using traditional fastening methods like bolts and nuts, and increasing the number of fasteners enlarges the pack's size, making it difficult to achieve effective impact resistance and easy assembly.
Innovation Solution
Incorporating impact attenuation members, such as first and second stoppers with columnar pressing portions and wings, between the module frames and the case, which are securely fixed using receiving portions in the case, to absorb external impacts without increasing the pack's size and facilitating easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fastening means (bolts and nuts) are used to fix battery modules, then the battery modules can be secured in the battery pack case, but it is impossible to completely protect the battery modules from external impact
Solution Approach 1:
The patent introduces impact attenuation members (elastomeric materials) that are pre-installed between the battery module and the battery pack case. These members are designed to cushion and absorb external impacts before they reach the battery module, providing beforehand protection against impact forces without requiring complex fastening structures.
2Reliability
If a large number of bolts and nuts are used to protect battery modules from impact, then the protection capability is improved, but the size of the battery pack is increased due to necessary fastening space
Solution Approach 1:
The patent merges the impact protection function with the existing battery pack structure by integrating impact attenuation members into the limited space between the battery module and the battery pack case. This combination approach provides impact resistance without requiring additional fastening space, thus avoiding an increase in battery pack size.
3Ease of manufacture
If traditional fastening methods are used to secure battery modules, then the modules are fixed in place, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent extracts the impact protection function from the fastening system and implements it through separately installable impact attenuation members. This extraction allows the fastening process to be simplified while maintaining impact protection, as the elastomeric members can be easily positioned and secured without requiring complex fastening operations.
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 battery pack achieves improved impact resistance by effectively attenuating external impacts and vibrations, ensuring the battery modules are protected while maintaining a compact size and allowing for straightforward assembly.
Implementation Method 1
an impact attenuation member configured to protect the module frame (300) from external impact is provided between an outer surface of the module frame (300) and an inner surface of the lower case (100)
Data Source
AI summary
A battery pack includes a lower case defining a first space having a predetermined size; an upper case at an upper part of the lower case to be fastened to the lower case, the upper case defining a second space; at least one module frame in the first space of the lower case and the second space of the upper case, the module frame defining a battery cell receiving recess; and a battery cell in the battery cell receiving recess. An impact attenuation member configured to protect the module frame from external impact is disposed between an outer surface of the module frame and an inner surface of the lower case.