Battery Pack Restraint Structure for Rigidity Without Extra Frames
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Solution Overview
Problem
Existing battery packs face challenges in achieving strength rigidity while minimizing weight and improving mount efficiency, as structural members required for strength rigidity often increase size and weight, and occupy valuable space in secondary battery mounts.
Innovation Solution
A battery pack design featuring a stacked body of secondary batteries restrained by a member extending in the stacked direction and supported by extrusion materials disposed perpendicular to the stacked direction, eliminating the need for additional structural members like cross members and side frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If structural members such as cross members or side frames are added to ensure strength rigidity, then strength rigidity is improved, but weight increases and mount space for secondary batteries is reduced
Solution Approach 1:
The restraint member combines multiple functions: it restrains the secondary batteries in the stacked direction while simultaneously serving as a structural member that ensures strength rigidity in the longitudinal and left-and-right directions. This integration eliminates the need for separate structural members, reducing weight while maintaining required strength.
Solution Approach 2:
The restraint member is designed to perform multiple roles: it acts as both a battery restraint component and a structural support element. By making the restraint member universal in function, the patent avoids adding dedicated structural members that would increase weight and reduce mount space.
2Strength
If structural members such as cross members or side frames are added to ensure strength rigidity, then strength rigidity is improved, but mount space for secondary batteries is reduced
Solution Approach 1:
The restraint member merges the functions of battery restraint and structural support. By integrating these functions into a single component, the patent eliminates the need for additional structural members that would occupy valuable mount space, thereby maximizing the volume available for secondary batteries.
Solution Approach 2:
The restraint member serves multiple purposes: restraining batteries and providing structural rigidity. This multi-functionality ensures that no additional dedicated structural members are needed, preserving maximum mount space for energy storage.
3Reliability
If the restraint member extends in the stacked direction, then restraint function is improved, but the need for additional structural members increases complexity
Solution Approach 1:
The restraint member is designed to extend in the stacked direction to provide effective battery restraint, while simultaneously serving as the primary structural element for ensuring strength rigidity. This merging of functions reduces device complexity by eliminating the need for separate structural members like cross members or side frames.
Data Source
AI summary
A battery pack includes a stacked body in which a plurality of secondary batteries are stacked, a restraint member that extends in a stacked direction of the stacked body along a first surface of the stacked body, and that restrains the plurality of secondary batteries, and a plurality of extrusion materials that are disposed along a second surface of the stacked body in the stacked direction, and that support the stacked body, and each of the plurality of extrusion materials is disposed such that an extrusion direction intersects the stacked direction.