Battery Pack Holding Structure for Device Clearance Under Case Load
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Solution Overview
Problem
Existing battery pack structures risk damaging device components when a load is applied to the case due to direct contact with the device component.
Innovation Solution
A battery pack design featuring a holding member with specific fixing and connecting portions that allows the device component to be held away from the opposing wall, deforming to avoid contact when a load is applied, with reduced bending rigidity at the boundary portions to facilitate displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device component is held close to the mounting surface to save space, then the battery pack size is reduced, but the device component is vulnerable to damage when load is applied to the case
Solution Approach 1:
The holding member is designed with elastic deformation capability, transitioning from a static structure to a dynamic one that can adapt to external loads. The connecting portions are configured to deform elastically when load is applied to the case, automatically adjusting the position of the device component to maintain spacing from the opposing wall while keeping the battery pack compact.
Solution Approach 2:
The holding member's geometric parameters (particularly the connecting portions) are optimized to achieve specific bending rigidity values. By controlling the moment of inertia and material properties, the holding member exhibits controlled elastic deformation under load, allowing the device component to move away from the opposing wall dynamically while maintaining compact overall dimensions.
2Stability of the object's composition
If the holding member is made rigid to firmly hold the device component, then the device component position is stable, but the holding member cannot deform to prevent contact with the opposing wall under load
Solution Approach 1:
Different portions of the holding member have different rigidity characteristics. The fixing portions are rigidly connected to the mounting surface for stable anchoring, while the connecting portions are designed with specific bending rigidity to allow controlled elastic deformation. This local differentiation of mechanical properties enables both stable positioning and protective deformation.
Solution Approach 2:
The holding member is pre-designed with elastic deformation capacity in the connecting portions, creating a built-in cushioning mechanism. When load is applied to the case, this pre-engineered flexibility allows the holding member to deform and create spacing between the device component and opposing wall, preventing direct contact and potential damage before it occurs.
3Strength
If the case is designed with thick walls to prevent deformation under load, then the case structural integrity is improved, but the device component may still contact the opposing wall causing damage
Solution Approach 1:
The holding member serves as an intermediary element between the case and the device component. Instead of relying solely on case wall thickness to prevent deformation, the holding member acts as a buffer that can deform elastically, absorbing the mechanical stress and preventing direct transmission of force from the case to the device component.
4Reliability
If additional protective structures are added between the case and device component to prevent contact, then device component protection is improved, but the device complexity increases
Solution Approach 1:
The holding member is designed to perform multiple functions simultaneously: it anchors the device component to the mounting surface, maintains proper positioning, and provides protective deformation under load. This multi-functionality eliminates the need for separate protective structures, reducing overall device complexity while maintaining protection.
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 prevents damage to device components by allowing them to move away from the opposing wall under load, maintaining the case's integrity without enlarging the battery pack size.
Implementation Method 1
When a load that deforms the opposing wall such that the opposing wall bulges toward the device component acts on the opposing wall, the holding member is deformed such that the device component is displaced in a direction in which the device component is spaced away from the opposing wall
Data Source
AI summary
The battery pack includes a battery stack, a holding member, a device component, and a case. The case has opposing walls facing the device component. The holding member has a pair of fixing portions, a holding portion, and a pair of connecting portions. Holding member, when the load for deforming the opposing wall so that the opposing wall bulges toward the device component acts on the opposing wall, the device component is deformed so as to displace in a direction away from the opposing wall.