Secondary Battery Lid Structure for Nested Protection Circuit Layout
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Solution Overview
Problem
Existing secondary battery designs face challenges in efficiently arranging electronic components, leading to increased size and potential safety issues due to insufficient consideration of space allocation.
Innovation Solution
The design incorporates a secondary battery configuration with a protrusion portion on the first lid body and a second lid body that penetrates the outer can, allowing for efficient arrangement of electronic components on a circuit board connected between the external terminal and the second lid body, thereby minimizing the battery's overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic components are arranged on the circuit board in conventional secondary battery designs, then the battery can provide necessary safety functions, but the battery size increases and internal space becomes insufficient
Solution Approach 1:
The circuit board is inserted into the hollow protrusion portion of the first lid body, nesting the electronic components within the structural framework of the battery rather than placing them on the surface. This allows the components to occupy space that would otherwise be empty, integrating the safety function into the existing structure without increasing overall battery volume.
Solution Approach 2:
The circuit board is positioned in a three-dimensional space created by the protrusion portion, utilizing the vertical dimension and internal cavity space rather than only surface mounting. This dimensional reorganization allows electronic components to be arranged within the battery's internal volume, optimizing space utilization.
2Ease of operation
If more space is allocated for electronic components, then component arrangement becomes easier, but the battery thickness increases
Solution Approach 1:
The protrusion portion is designed with a hollow interior that specifically accommodates the circuit board, creating a localized space optimized for electronic component arrangement. This localized design allows easy component placement within the protrusion portion without requiring increased thickness across the entire battery structure.
3Reliability
If the circuit board is positioned to accommodate electronic components, then safety functions are ensured, but the internal space configuration becomes complex
Solution Approach 1:
The protrusion portion serves multiple functions simultaneously: it provides structural support for the first lid body, creates a mounting space for the circuit board, and facilitates electrical connections between components. By merging these functions into a single integrated structure, the design simplifies the internal space configuration while ensuring safety functions.
Data Source
AI summary
A secondary battery is provided and including an outer can; an external terminal insulated from the outer can; a battery element that is housed in the outer can and has a first electrode and a second electrode; a first lid body having a first protrusion portion that protrudes toward an inside of the outer can; and a second lid body disposed to be electrically insulated from the first lid body, in which the first protrusion portion of the first lid body has an opening portion, the second lid body has a second protrusion portion that is electrically insulated from the first protrusion portion and penetrates the opening portion toward the inside of the outer can, and a circuit board is connected between the external terminal and the second lid body, and the external terminal, the second lid body, and the second electrode are electrically connected to each other, and the first lid body and the first electrode are electrically connected to each other.