Battery Holder Lid Projection for Vibration Restraint
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Solution Overview
Problem
In energy storage apparatuses, movement of energy storage devices within the outer case due to vibration can lead to reliability issues, such as failures at joint portions between the energy storage device and conductive members. Existing solutions, like fixing tools, increase the number of components and complicate manufacturing processes.
Innovation Solution
The energy storage apparatus includes a plurality of energy storage devices, holders, and an outer case. Each holder is disposed along a side surface of an energy storage device, and the outer case features a lid body with a projecting portion that presses the holder, restricting movement and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing tool is attached to the lid body to press the energy storage device, then movement of the energy storage device is restricted, but the number of components increases and the manufacturing process becomes complicated
Solution Approach 1:
The fixing structure is merged with the lid body by forming a projecting portion directly on the lid body. This integration eliminates the need for separate fixing tools while maintaining the pressing function that restricts movement of the energy storage device, thereby reducing component count and simplifying manufacturing.
Solution Approach 2:
The lid body is given multiple functions: it serves as both the cover for the outer case and as the fixing structure through its projecting portion. This multi-functionality eliminates the need for dedicated fixing components, reducing overall device complexity while maintaining reliability.
2Reliability
If a fixing tool is attached to the lid body to press the energy storage device, then movement of the energy storage device is restricted, but the manufacturing process becomes complicated
Solution Approach 1:
The fixing structure is merged with the lid body by forming a projecting portion directly on the lid body. This integration eliminates the need for separate fixing tools while maintaining the pressing function that restricts movement of the energy storage device, thereby reducing component count and simplifying manufacturing.
Solution Approach 2:
The lid body serves itself by incorporating the fixing function directly into its structure. The projecting portion of the lid body performs the fixing action without requiring external fixing tools, simplifying the manufacturing process by reducing assembly steps and component installation.
3Reliability
If the projecting portion presses the holder in a region overlapping the energy storage device, then movement is restricted, but the energy storage device may be damaged
Solution Approach 1:
The pressing action is localized to a specific region on the holder that does not overlap with the energy storage device. This selective localization of the pressing function ensures movement restriction while avoiding damage to the energy storage device by applying force only to the appropriate area of the holder.
Solution Approach 2:
The holder serves as an intermediary between the projecting portion and the energy storage device. The projecting portion presses the holder at a region that does not overlap the energy storage device, and the holder transmits the restricting force to the energy storage device indirectly, preventing direct contact and potential damage.
Data Source
AI summary
An energy storage apparatus includes an energy storage device, a holder that holds the energy storage device, and an outer case that accommodates the energy storage device and the holder. The outer case includes an outer case main body having an opening portion and a lid body that closes the opening portion. The lid body includes a projecting portion that projects toward the holder and is brought into contact with or presses the holder in a projecting direction of the projecting portion.