Battery Terminal Insulator Layout for Long-Life Heat-Sealed Feedthroughs
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Solution Overview
Problem
Conventional batteries face issues with the deterioration of insulation members due to high temperatures during charging and discharging, leading to a decrease in insulating and sealing effectiveness over time, as the large contact area between the terminal and insulation members accelerates temperature rise and degradation.
Innovation Solution
A battery design featuring an external and internal insulation member configuration, where the terminal member includes a columnar and umbrella-shaped portion, and the insulation members have specific plate and cylindrical portions to distribute heat and maintain contact, preventing premature deterioration and ensuring long-term insulating and sealing functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal member and insulation member are placed in close contact to ensure insulating and sealing functions, then the insulating and sealing effectiveness is improved, but the temperature of the insulation member rises faster causing quicker deterioration
Solution Approach 1:
The insulation member is divided into two separate components: an external insulation member placed outside the outer casing and an internal insulation member placed inside the outer casing. Both members contact the terminal member to provide insulating and sealing functions, but by splitting the single insulation member into two segments, the heat generated during charging and discharging is distributed to both members rather than concentrating on one, thereby reducing the temperature rise rate of each individual insulation member and slowing down deterioration while maintaining reliable insulating and sealing effectiveness.
2Reliability
If the contact area between terminal member and insulation member is increased to improve sealing, then sealing effectiveness is improved, but the insulation member deteriorates faster due to higher temperature
Solution Approach 1:
The insulation member is divided into two separate components: an external insulation member placed outside the outer casing and an internal insulation member placed inside the outer casing. Both members contact the terminal member to provide insulating and sealing functions, but by splitting the single insulation member into two segments, the heat generated during charging and discharging is distributed to both members rather than concentrating on one, thereby reducing the temperature rise rate of each individual insulation member and slowing down deterioration while maintaining reliable insulating and sealing effectiveness.
3Device complexity
If a single insulation member is used to simplify the structure, then device complexity is reduced, but the insulation member deteriorates quickly due to concentrated heat
Solution Approach 1:
The insulation member is divided into two separate components: an external insulation member placed outside the outer casing and an internal insulation member placed inside the outer casing. Both members contact the terminal member to provide insulating and sealing functions, but by splitting the single insulation member into two segments, the heat generated during charging and discharging is distributed to both members rather than concentrating on one, thereby reducing the temperature rise rate of each individual insulation member and slowing down deterioration while maintaining reliable insulating and sealing effectiveness.
Solution Approach 2:
The external insulation member and internal insulation member act as intermediary heat dissipation paths between the terminal member and the environment. By introducing these two intermediary insulation members, the concentrated heat from the terminal member is distributed and dissipated more effectively, preventing rapid deterioration while maintaining the necessary insulating and sealing functions.
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 battery effectively disperses heat generated during charging and discharging, preventing the insulation members from deteriorating quickly, thus maintaining insulating and sealing performance over a long period.
Implementation Method 1
The external insulation member and the internal insulation member can disperse the heat generated by the terminal member during charging and discharging to both the outer and internal insulation members to suppress the temperature of each of the outer and internal insulation members from rising
Data Source
AI summary
In a battery, a terminal member includes: a columnar portion; a head portion, outside an outer casing, having a larger diameter than a through hole of a lid; and an umbrella-shaped portion, more inside than a current collecting member, having a larger diameter than a through hole of the current collecting member to closely contact an inside surface thereof. A gasket includes: a plate-shaped portion between the lid and the head portion; and a cylindrical portion between a wall surface of the through hole of the lid and the columnar portion. An insulator includes: a plate-shaped portion between the lid and the current collecting member; and a cylindrical portion between the wall surface of the through hole of the lid and the columnar portion. Leading ends of the cylindrical portions close contact each other between the wall surface of the through hole of the lid and the columnar portion.