Battery Bottom Cover Layout for Weld Heat and Insulation Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lithium batteries face safety issues during preparation and stability problems due to close proximity of welding marks to the battery core and insulating adhesive tape, leading to potential safety hazards and insulation failures.
Innovation Solution
A battery design featuring a conductive housing with a top shell and bottom cover, a first conductive member, and an insulating adhesive layer, where a spacing is maintained between the welding mark and the adhesive layer to prevent contact and high temperature effects, ensuring safe preparation and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the welding mark is placed close to the insulating adhesive layer to reduce space, then the device complexity is reduced, but the safety during preparation deteriorates due to potential contact and high temperature effects
Solution Approach 1:
The patent introduces a first spacing dimension between the welding mark and the insulating adhesive layer, transforming a two-dimensional layout problem into a three-dimensional spatial arrangement. This dimensional approach allows maintaining safety requirements while optimizing space utilization through vertical or radial spacing rather than only horizontal separation.
Solution Approach 2:
The first spacing acts as an intermediary zone between the welding mark and the insulating adhesive layer. This intermediate space prevents direct contact and thermal interaction, serving as a buffer that protects the adhesive layer from high temperature effects during the welding process while maintaining overall structural compactness.
2Device complexity
If the welding mark is placed close to the insulating adhesive layer to reduce space, then the device complexity is reduced, but the working stability deteriorates due to high temperature affecting bonding performance
Solution Approach 1:
The first spacing is designed in advance as a protective cushion between the welding mark and the insulating adhesive layer. This pre-established spatial buffer prevents high temperature from the welding process from reaching the adhesive layer, thereby protecting the bonding performance from thermal degradation before any potential damage can occur.
Solution Approach 2:
The patent converts the potentially harmful high temperature effect into a beneficial thermal management solution by strategically positioning the first spacing. The spacing allows controlled thermal isolation, transforming what could be a harmful thermal interaction into a protected design feature that enhances working stability while maintaining structural efficiency.
3Reliability
If the first conductive member is disposed to connect electrode tabs, then electrical connectivity is improved, but the risk of electrical contact with the bottom cover increases
Solution Approach 1:
The insulating adhesive layer serves as an intermediary barrier between the first conductive member and the bottom cover. This intermediate insulating layer allows the conductive member to perform its electrical connection function while preventing direct electrical contact with the bottom cover, thereby eliminating the short circuit risk.
Solution Approach 2:
The patent applies local quality differentiation by making the adhesive layer insulating in the specific region where it contacts the bottom cover, while allowing other parts of the battery structure to maintain their respective conductive or insulating properties as needed. This localized insulating property ensures electrical isolation exactly where required without compromising overall electrical connectivity.
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 enhances safety by preventing welding mark contact with the adhesive layer and maintains insulation performance, improving the stability and safety of lithium batteries during preparation and use.
Implementation Method 1
an insulating adhesive layer is disposed between the first conductive member and the bottom cover
Implementation Method 2
the insulating adhesive layer connects the first conductive member and the bottom cover
Implementation Method 3
a first spacing between the welding mark and the insulating adhesive layer... a high temperature generated by welding is prevented from affecting bonding performance of the insulating adhesive layer
Data Source
AI summary
A battery is provided. A first conductive member is disposed within an accommodating cavity of the battery, and an insulating adhesive layer is disposed between the first conductive member and a bottom cover, and connects the first conductive member and the bottom cover. A through hole is disposed on the bottom cover, and is covered by the first conductive member. An annular side wall is welded with the bottom cover at an edge on a side close to the bottom cover to form a welding mark. There is a first spacing between the welding mark and the insulating adhesive layer, and a width of the first spacing is more than 3 times of a width of the welding mark. A first electrode tab of a battery core is electrically connected with the first conductive member, and a second electrode tab of the battery core is electrically connected with the housing.