Battery Pack Partition Beam Structure for Vibration Rigidity
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Solution Overview
Problem
Existing battery packs in vehicles, especially large ones, fail to meet strength requirements under conditions like vibration and impact due to insufficient rigidity, primarily because the cantilever beam at the bottom is insufficient to provide adequate support and protection to the battery cells.
Innovation Solution
A battery pack design featuring a partition beam system with a hitch beam and reinforcing beam that partitions the accommodation space into smaller units, where the hitch beam is positioned higher than the battery cells to provide additional protection and support, and hitch points are strategically placed for secure connection to the vehicle body, enhancing the pack's rigidity and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cantilever beam is used at the bottom of the battery pack, then the structure is simple and easy to manufacture, but the rigidity and strength are insufficient to protect battery cells under vibration and impact conditions
Solution Approach 1:
The battery pack structure is segmented into multiple functional components: a bottom wall for support, a partition beam extending from the bottom wall to divide the accommodation space, and a hitch beam extending from the partition beam to provide additional structural support. This segmentation allows each component to perform its specific function while collectively achieving the required strength and rigidity.
Solution Approach 2:
The hitch beam extends in a direction different from the partition beam, creating a multi-dimensional support structure. The partition beam extends in a first direction while the hitch beam extends in a second direction that is different from the first direction, adding structural complexity in multiple dimensions to enhance overall rigidity and protective capability.
2Strength
If the hitch beam is positioned higher than the battery cells, then the protection and support for battery cells is improved, but the device complexity increases
Solution Approach 1:
The partition beam serves multiple functions: it divides the accommodation space into separate regions, provides structural support, and serves as a mounting platform for the hitch beam. The hitch beam similarly provides both structural reinforcement and a mounting surface for connection components. This multi-functionality reduces the need for separate dedicated components.
Solution Approach 2:
The partition beam and hitch beam are merged into an integrated structural system where the partition beam provides the base structure and the hitch beam builds upon it. The connection between these beams is integrated into the overall design, creating a unified support structure that efficiently protects battery cells while minimizing the number of separate components.
3Strength
If hitch points are strategically placed on the hitch beam for secure connection to the vehicle body, then the connection strength is improved, but the manufacturing and assembly complexity increases
Solution Approach 1:
The hitch beam is pre-configured with connection components (such as hooks, eyes, or mounting flanges) during the manufacturing process. This preliminary preparation of connection points allows for simplified assembly when the battery pack is installed in the vehicle, as the connection components are already in place and properly positioned on the hitch beam.
Data Source
AI summary
This application provides a battery pack and a vehicle. The battery pack includes: a battery accommodation box, including a box body and a cover body, where the box body fits with the cover body to form an accommodation space; a partition beam, disposed in the accommodation space to partition the accommodation space into a plurality of accommodation units, where the partition beam includes a hitch beam that extends in a first direction parallel to a bottom wall of the box body, a bottom of the hitch beam is fixed to the bottom wall of the box body, and a top of the hitch beam is connected to the cover body; and a plurality of battery modules, where the battery modules include a plurality of battery cells, and each battery module is disposed in a corresponding accommodation unit.