Battery Charging Head Pin Layout for Low-Resistance Cell Contact
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Solution Overview
Problem
Existing charging and discharging devices for secondary batteries experience issues with contact resistance during high-rate charging, leading to reduced accuracy in battery performance evaluation and potential heat generation.
Innovation Solution
The device features a pin mounting portion with a current pin located in the center and a voltage pin at the periphery, optimized in size and spacing to maximize the contact area of the current pin and minimize the voltage pin, thereby reducing contact resistance and preventing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate drying device is used to remove solvent from the electrode plate after coating, then the electrode plate can be dried, but the production process becomes complex and production lines must be stopped for maintenance
Solution Approach 1:
The drying function is merged with the coating device by integrating a heating unit directly into the coating apparatus. The heating unit is positioned to contact the electrode plate during the coating process, enabling simultaneous coating and drying operations within a single device, thereby eliminating the need for separate drying equipment and continuous production line stoppages.
Solution Approach 2:
The coating device is transformed into a multi-functional unit that performs both coating and drying operations. The heating unit integrated into the coating device provides drying capability, allowing the same equipment to handle multiple process steps (coating and drying) that previously required separate dedicated devices, thus simplifying the overall production system.
2Ease of manufacture
If the coating device is stopped frequently for maintenance, then cleaning can be performed, but productivity decreases
Solution Approach 1:
The heating unit is designed as a detachable component that can be easily removed from the coating device. This extraction design allows the heating unit to be separated for cleaning or replacement without disassembling the entire coating apparatus, enabling quick maintenance operations that minimize production interruptions and maintain high productivity.
Solution Approach 2:
The heating unit incorporates a movable pressing member that can adjust its position and apply variable pressure to the electrode plate during coating. This dynamic design allows for easy access and removal of the heating unit for cleaning, while maintaining effective heating contact during operation, thus balancing cleanability with continuous production requirements.
3Productivity
If a heating unit with large contact area is used, then drying efficiency improves, but the device structure becomes more complex
Solution Approach 1:
The heating unit utilizes a flexible heating film that can conform to the surface of the electrode plate. This thin film design provides extensive contact area for efficient heat transfer and drying, while the flexible nature allows the heating element to adapt to the substrate shape without requiring complex rigid structures, thus achieving high drying efficiency with simple construction.
Solution Approach 2:
The heating unit applies heat locally through a pressing member that contacts the electrode plate at the coating location. This localized heating approach achieves effective drying where needed without requiring the entire device structure to be complex, as heat is concentrated at the interface between the heating film and electrode plate during the coating process.
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
This configuration enhances the contact area of the current pin, reducing resistance and improving the accuracy of battery performance evaluation while preventing heat generation.
Implementation Method 1
heating unit that heats and removes a solvent used as a diluent for the slurry
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A charging and discharging device for secondary battery according to an embodiment of the present disclosure includes a body portion; and a head portion located under the body portion, wherein the head portion comprises a pin mounting portion that is bound to the upper portion or lower portion of the secondary battery, wherein the pin mounting portion includes a current pin and a voltage pin, wherein the current pin and the voltage pin each comprises a plurality of projections, and wherein an area where the current pin is formed is larger than an area where the voltage pin is formed.