Battery Pack Elastic Connecting Member Force Absorption
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Solution Overview
Problem
The existing battery packs for electric vehicles face challenges in enhancing mechanical service life while maintaining high energy density, as reinforcing members to improve structural rigidity can lead to interactions between battery modules under force, potentially causing safety accidents.
Innovation Solution
A battery pack design incorporating elastic connecting members that can deform to absorb forces between adjacent modules, combined with rigid connecting members for structural support, to prevent interactions and ensure safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing members are added to increase the strength of the lower case, then the mechanical service life is improved, but the energy density decreases and cost increases
Solution Approach 1:
The battery pack structure is divided into modular components: the lower case, upper cover, and battery modules. This segmentation allows the load-bearing function to be distributed across multiple components rather than concentrating all reinforcement requirements on the lower case, enabling a more efficient use of materials and maintaining energy density.
Solution Approach 2:
The lower case and upper cover are combined to form a closed protective structure that collectively bears the mechanical loads. This merging approach distributes the strength requirements across both components, reducing the need for excessive reinforcement in the lower case alone, thereby preserving energy density while maintaining mechanical service life.
2Stability of the object's composition
If connection members are used to connect battery modules into an integrity, then the overall structural rigidity is improved, but the battery modules may interact with each other under force causing safety accidents
Solution Approach 1:
Elastic buffering pieces are pre-installed at the connection positions between adjacent battery modules. These buffering pieces act as shock absorbers that can deform elastically when external forces are applied, preventing direct force transmission between modules and eliminating the harmful interaction that could lead to safety accidents.
Solution Approach 2:
The connection structure incorporates elements with different mechanical properties (rigid connection members for structural integrity, elastic buffering pieces for shock absorption). By changing the mechanical parameters of different connection components, the system achieves both high rigidity and safety by allowing controlled deformation in specific areas while maintaining overall structural stability.
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 design effectively absorbs forces between battery modules, preventing safety accidents and maintaining structural rigidity while adhering to energy density requirements.
Implementation Method 1
an elastic connecting member being able to elastically deform in the first direction such that the adjacent two battery modules are elastically connected by the connecting assembly
Data Source
AI summary
The present disclosure provides a battery pack, including: battery modules, wherein two or more of the battery modules are arranged side by side in a first direction; and connecting assemblies, wherein each connecting assembly is connected between adjacent two battery modules, and the connecting assembly includes an elastic connecting member being able to elastically deform in the first direction such that the adjacent two battery modules are elastically connected by the connecting assembly. The elastic connecting member can provide a buffer between the adjacent two battery modules. In the case that one of the adjacent two battery modules suffers a force, the elastic connecting member can absorb a force from this battery module, to prevent the adjacent two battery modules from interacting with each other when suffering the force, and avoid a safety accident caused by the interaction between the two battery modules connected to each other.