Battery Pack Bottom Shield Connection Using a Protective Cover
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Solution Overview
Problem
Conventional battery packs suffer from structural damage to the bottom shield plate due to its connection with the beam, which is pulled towards the beam direction by fasteners, leading to potential damage and gaps that can compromise sealing and heat dissipation.
Innovation Solution
A battery pack design featuring a bottom shield plate with a positioning hole and a protective cover connected by a fastener, where the protective cover abuts against the beam, enhancing the connection reliability and structural integrity while optimizing sealing and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bottom shield plate is connected to the beam by a fastener, then the connection is established, but the bottom shield plate is pulled toward the beam direction causing damage
Solution Approach 1:
The patent introduces a protective cover as an intermediary component between the bottom shield plate and the beam. The protective cover receives the fastener and distributes the connection force, preventing the fastener from directly pulling on the bottom shield plate. This mediator structure resolves the contradiction by enabling reliable connection while protecting the bottom shield plate from damage.
Solution Approach 2:
The patent segments the connection structure into distinct functional components: the bottom shield plate, the protective cover, and the beam. By separating the force-bearing function (handled by the protective cover and fastener) from the protective function (handled by the bottom shield plate), the design allows each component to perform its specific role without compromising the other, thus resolving the strength-reliability contradiction.
2Strength
If a protective cover is added to prevent damage, then structural strength is improved, but device complexity increases
Solution Approach 1:
The protective cover is designed to integrate multiple functions into a single component: it serves as both a protective element for the bottom shield plate and as the primary structure for receiving the fastener. By merging these functions, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity while still achieving improved structural strength.
3Reliability
If the bottom shield plate is pulled toward the beam direction, then connection is achieved, but sealing performance deteriorates
Solution Approach 1:
The protective cover acts as a mediator that decouples the connection function from the sealing function. The fastener connects to the protective cover rather than directly to the bottom shield plate, preventing the pulling force from compromising the sealing interface between the bottom shield plate and the bottom plate. This resolves the contradiction by maintaining both connection reliability and sealing performance.
Data Source
AI summary
A battery pack includes a bottom plate, a bottom shield plate and a beam. The bottom shield plate is disposed below the beam, the bottom plate is disposed between the bottom shield plate and the beam, a positioning hole is disposed on the bottom shield plate. The battery pack further includes a protective cover, a portion of the protective cover is disposed in the positioning hole and connected to the bottom shield plate, a top portion of the protective cover abuts against the beam, and the beam, the bottom shield plate, and the protective cover are connected by a fastener penetrating the protective cover.