Insulation Mask for Battery Charging Pin Safety
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Solution Overview
Problem
Conventional prismatic type battery cells face safety issues due to contact failures between charging pins and electrode terminals, leading to potential short circuits and explosions, which require manual attachment of insulation materials, increasing manufacturing costs.
Innovation Solution
A battery cell charging and discharging apparatus with an insulation mask made of electrically insulating material, fixed to the first die plate, covers the remaining part of the battery cell excluding the first electrode terminal, preventing direct contact between the charging pin and the second electrode terminal, thus preventing short circuits and explosions without the need for manual attachment of insulation materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual attachment of insulation materials is used, then safety against short circuits is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The insulation mask is merged with the first die plate to form an integrated safety structure. The mask fixing portions are directly formed on the first die plate, eliminating the need for separate insulation material attachment steps and reducing manufacturing complexity while maintaining short circuit prevention functionality.
Solution Approach 2:
The insulation mask is pre-installed on the first die plate before the charging/discharging process begins. The mask fixing portions are designed to automatically secure the mask in position, ensuring safety is established in advance without requiring manual intervention during manufacturing.
2Reliability
If manual attachment of insulation materials is used, then safety against short circuits is improved, but manufacturing time and labor cost increase
Solution Approach 1:
By combining the insulation mask with the first die plate structure, the patent eliminates manual attachment operations. The mask fixing portions are integrated into the die plate, allowing automated securing of the mask and significantly reducing labor time and costs while maintaining safety standards.
Solution Approach 2:
The mask fixing portions are designed to automatically secure the insulation mask in position during the charging/discharging process setup. This self-securing mechanism eliminates the need for manual attachment and replacement operations, improving manufacturing efficiency while ensuring consistent safety.
3Ease of operation
If the first charging pin is made to contact the first electrode terminal, then charging function is improved, but risk of contact failure and short circuit increases
Solution Approach 1:
The insulation mask acts as an intermediary between the first charging pin and the battery cell surface. It allows the charging pin to maintain reliable contact with the first electrode terminal while preventing accidental contact with the second electrode terminal, thus reducing short circuit risk without compromising charging function.
Solution Approach 2:
The insulation mask provides localized electrical insulation specifically at the area where the second electrode terminal is exposed. This targeted insulation approach maintains good electrical contact for charging while preventing harmful short circuits, addressing the specific safety issue without affecting overall charging performance.
Data Source
AI summary
The present disclosure provides a battery cell charging and discharging apparatus configured to charge and discharge a battery cell which is sealed in a state in which an electrode assembly is embedded in a battery case and includes a first die plate having a first charging pin which is connected to a first electrode terminal of the battery cell by being contacted thereto during a charging and discharging process of the battery cell. The first die plate includes an insulation mask of an electrical insulation material formed in a structure covering a remaining part of the battery cell excluding the first electrode terminal at a position corresponding to the first charging pin and mask fixing portions configured to fix both sides of the insulation mask so that a position of the insulation mask is set.