Battery Cell Adapter Cavity for Welding Point Tape Adhesion
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Solution Overview
Problem
The adhesive tape used to cover welding points in battery structures is prone to loosening or detaching, affecting safety and stability due to the protruding nature of the welding points, which leads to suspension and poor adhesion, and the accumulation of welding slag further exacerbates this issue.
Innovation Solution
A battery cell design that incorporates an accommodating cavity between the adapter and covering member to house at least a portion of the welding point, reducing its protrusion and accommodating any slag, thereby enhancing the adhesion of the covering member to the adapter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protruding welding point is formed on the adapter, then the welding point can be securely attached to the adapter, but the covering member becomes prone to loosening or detaching due to poor adhesion
Solution Approach 1:
The patent applies nesting by placing the protruding welding point inside a recess on the adapter surface. The covering member then covers this recess, creating a nested structure where the welding point is housed within the recess rather than protruding outward. This eliminates the suspension effect and improves adhesion reliability while maintaining secure welding point attachment.
Solution Approach 2:
The patent applies local quality by creating a recess specifically at the welding point location on the adapter. This localized structural modification allows the welding point to be securely attached while the recess provides a flat surface for the covering member to adhere to, resolving the adhesion problem without compromising welding strength.
2Ease of manufacture
If the welding point protrudes from the adapter, then the welding point can be formed, but welding slag accumulates between the covering member and adapter causing detachment
Solution Approach 1:
The recess structure nests the welding point and any associated welding slag within its boundaries. This prevents welding slag from accumulating between the covering member and adapter surface, eliminating a major cause of covering member detachment while maintaining ease of welding point formation.
Solution Approach 2:
The patent converts the potential harm of welding slag accumulation into a benefit by designing the recess to contain and isolate the welding slag. The welding slag is trapped within the recess rather than interfering with the covering member adhesion, thus converting a harmful factor into a contained element that does not compromise reliability.
3Object-affected harmful factors
If adhesive tape is used to cover the welding point, then the welding point is covered, but the adhesive tape loosens or detaches affecting safety performance
Solution Approach 1:
The recess structure provides a nested housing for the welding point, allowing the covering member (adhesive tape) to adhere to the flat recess surface rather than trying to conform to a protruding welding point. This nesting arrangement ensures reliable coverage while preventing loosening or detachment.
Solution Approach 2:
The recess is pre-formed on the adapter surface before the covering member is applied. This preliminary structural preparation creates an optimal adhesion surface that ensures the covering member maintains stable attachment, preventing the loosening and detachment issues that occur with direct application over protruding welding points.
Data Source
AI summary
This application relates to the field of power batteries and provides a battery cell, a battery, and a power-consuming apparatus. The battery cell includes an adapter with a protruding welding point and a covering member connected to the adapter. An accommodating cavity is formed between the covering member and the adapter to house at least part of the welding point. The structure allows the covering member to fit more closely to the adapter around the welding point, reducing suspension or detachment of the covering member. As a result, adhesion between the covering member and the adapter is improved, enhancing structural reliability and performance of the battery cell.