Battery Case Side-Beam Protrusions for Vibration Restraint
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Solution Overview
Problem
Battery cells experience relative displacement and safety hazards due to excessive amplitude in shaking, which is not adequately addressed by existing technologies.
Innovation Solution
The battery case incorporates protrusions on its side beams to increase rigidity, reduce amplitude, and enhance safety by forming a quadrangular accommodation space with alternating side beams, optimizing protrusion size and placement to balance safety and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the battery case structure is simplified without protrusions, then the manufacturing complexity is reduced, but the rigidity of the case decreases leading to excessive amplitude in shaking
Solution Approach 1:
The patent applies local quality by adding protrusions only at specific locations on the side beams rather than reinforcing the entire case structure. These localized protrusions provide the necessary rigidity enhancement exactly where needed to reduce shaking amplitude, while keeping the rest of the case structure simple and easy to manufacture.
Solution Approach 2:
The protrusions are designed with asymmetric characteristics, extending in specific directions from the side beams. This asymmetric design allows the protrusions to effectively increase rigidity in the critical directions where shaking occurs, while minimizing the overall material added and maintaining manufacturing simplicity.
2Strength
If protrusions are added to side beams to increase rigidity, then the amplitude in shaking is reduced, but the internal space of the battery is reduced
Solution Approach 1:
The patent applies partial action by adding protrusions of specific dimensions that are sufficient to achieve the required rigidity enhancement and reduce shaking amplitude, but not excessive enough to significantly compromise the internal battery space. The protrusion size is carefully controlled to provide just enough structural reinforcement.
Solution Approach 2:
The patent optimizes the parameters of the protrusions (such as length, width, and positioning) to achieve the best balance between rigidity enhancement and space conservation. By carefully adjusting these parameters, the case gains sufficient stiffness to reduce shaking while minimizing the impact on internal battery volume.
3Strength
If larger protrusions are used to enhance rigidity, then the amplitude reduction is improved, but the weight of the battery increases
Solution Approach 1:
The protrusions are designed to provide localized reinforcement only in the areas where rigidity is most needed to combat shaking. This localized approach enhances structural strength effectively while adding minimal weight, as the reinforcement is concentrated only where required rather than distributed throughout the entire case.
Solution Approach 2:
The side beams are designed as composite structures combining the base beam material with the protrusion elements. This composite design allows for optimized weight-strength characteristics, where the protrusions provide the necessary rigidity enhancement with minimal additional weight.
Data Source
AI summary
A case of battery includes a base plate and a plurality of side beams. The plurality of side beams are connected to the base plate and enclosed together with the base plate to form an accommodation space. At least one of the side beams includes a beam body and a protrusion protruding from a surface of the beam body facing towards the accommodation space.