Battery Box Side Beam Reinforcement Without Volume Increase
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Solution Overview
Problem
Batteries used in electrical apparatuses, such as vehicles, face structural strength issues due to deformation under movement or vibration, primarily caused by insufficient compressive resistance and debonding between battery cells and side beams.
Innovation Solution
A box body design for batteries that includes a base plate and side beams with reinforcing portions protruding from the beam main body. These reinforcing portions have an avoidance structure, such as gaps or protrusions, to accommodate internal components without increasing the battery's volume, thereby enhancing structural strength and adhesive bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the side beam is increased to improve compressive resistance, then the structural strength is improved, but the overall volume of the battery increases
Solution Approach 1:
The patent applies local quality by adding reinforcing portions only at specific locations where compressive stress is highest, rather than uniformly increasing the thickness of the entire side beam. The reinforcing portion includes protrusions that locally enhance the moment of inertia and compressive resistance at critical areas while keeping other portions of the side beam thin, thus improving structural strength without significantly increasing the overall battery volume.
2Strength
If the distance between the battery cell and the side beam is reduced to improve adhesive strength, then the bonding is improved, but the space for internal components is reduced
Solution Approach 1:
The patent uses local quality by reducing the distance between the battery cell and the side beam only at specific locations where the reinforcing portions are positioned. The protrusions of the reinforcing portion extend toward the battery cell, creating localized bonding areas with high adhesive strength, while other regions maintain larger distances to accommodate internal components such as heat exchange plates and manifolds.
Solution Approach 2:
The patent applies dimensionality change by extending the reinforcing portion in the thickness direction of the side beam through protrusions. This vertical extension allows the side beam to achieve better bonding with the battery cell without reducing the horizontal spacing between the side beam and internal components, thus solving the contradiction by utilizing the thickness dimension for bonding enhancement.
3Ease of manufacture
If the side beam structure is simplified to reduce manufacturing complexity, then the ease of manufacture is improved, but the structural strength is reduced
Solution Approach 1:
The patent applies segmentation by dividing the side beam into distinct functional portions: a beam main body and separate reinforcing portions with protrusions. The reinforcing portion can be manufactured as a separate component and then connected to the beam main body through welding or bonding. This segmentation allows each part to be optimized independently - the beam main body for ease of manufacture and the reinforcing portion for structural strength enhancement.
Data Source
AI summary
A box body of a battery, a battery, and an electrical apparatus are described. The box body includes a base plate and a plurality of side beams, the plurality of side beams are connected to the base plate, and an accommodating space is defined by the plurality of side beams and the base plate, where at least one side beam includes a beam main body and a reinforcing portion, the reinforcing portion protrudes from the surface of the beam main body facing the accommodating space, the reinforcing portion is provided with an avoidance structure, and the avoidance structure is configured to avoid components accommodated in the accommodating space. In some embodiments, at least one side beam is provided with the reinforcing portion, so that the structural strength of the side beam is improved. The reinforcing portion is arranged on the surface of the beam main body facing the accommodating space.