Battery Cap Assembly Support for Insulator Position Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium ion secondary batteries face safety issues due to the risk of the lower insulating member moving downward from its initial position, which can affect the battery's safety and performance.
Innovation Solution
A secondary battery design that includes a support member between the current collecting member and the lower insulating member, where the support member is elastic and has a thickness greater than the gap between them, effectively preventing the lower insulating member from moving downward by providing a supporting force and maintaining its initial position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If there is a gap between the current collecting member and the lower insulating member, then the assembly is easier to manufacture, but the lower insulating member may move downward affecting safety
Solution Approach 1:
The support member is introduced as an intermediary component between the current collecting member and the lower insulating member. This elastic support member fills the gap and provides continuous support to the lower insulating member, preventing downward movement while maintaining the gap's manufacturing advantages. The support member acts as a mediator that transmits and distributes forces to keep the lower insulating member in position.
2Reliability
If the lower insulating member is positioned close to the current collecting member, then safety is improved, but manufacturing precision requirements increase
Solution Approach 1:
The support member is designed as an elastic component that can dynamically adapt to manufacturing variations and assembly tolerances. Instead of requiring precise fixed positioning, the elastic support member can deform within certain limits to accommodate variations while still providing adequate support. This dynamic characteristic reduces the stringency of manufacturing precision requirements while maintaining safety.
3Reliability
If a rigid support structure is used to prevent lower insulating member movement, then reliability is improved, but device complexity increases
Solution Approach 1:
The support member is designed as an elastic component with flexible characteristics, resembling a flexible structural element. This elastic support member provides the necessary mechanical support to prevent lower insulating member movement while maintaining a simple, compact structure. The flexibility of the support member allows it to conform to the assembly geometry without requiring complex rigid support structures.
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 support member effectively limits the lower insulating member's movement, enhancing the safety and reliability of the secondary battery by ensuring it remains in its correct position, thereby improving the battery's overall performance and safety.
Implementation Method 1
the support member is formed as an elastic member and has a thickness in a free state greater than or equal to a distance between the body portion of the current collecting member and the base portion of the lower insulating member
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present disclosure relates to a secondary battery, which includes a cap assembly (13) including a cap plate (131) provided with an electrode lead-out hole (131a), an electrode terminal (132) adapted to cover the electrode lead-out hole (131a), a sealing ring (133) disposed between the cap plate (131) and the electrode terminal (132), and a lower insulating member (134) including a base portion (134a) and a protruding portion (134b) connected to each other, wherein the base portion (134a) is located at a lower side of the cap plate (131) and has a thickness of 0.01 mm to 10 cm, and the protruding portion (134b) is at least partially located in the electrode lead-out hole (131a); a current collecting member (14) including a body portion (141) and an extending portion (142) connected to each other, wherein the body portion (141) is located below the base portion (134a) of the lower insulating member (134), and the extending portion (142) is configured to extend into the electrode lead-out hole (131a) and is connected to the electrode terminal (132); and a support member (15) disposed between the body portion (141) of the current collecting member (14) and the base portion (134a) of the lower insulating member (134). The secondary battery according to the embodiments of the present disclosure can limit the lower insulating member via the support member and thus can effectively prevent the lower insulating member from moving downward.