Battery NTC Base Plate Assembly for Compact Cell Temperature Sensing
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Solution Overview
Problem
The existing methods for temperature collection in batteries using FPC welding require complex NTC fixing structures, leading to increased molding difficulty and assembly challenges due to insufficient space, which complicates the assembly process and increases labor costs.
Innovation Solution
A temperature collecting device comprising a base plate with an exposed and connecting surface, where the NTC is integrally connected and encapsulated, allowing direct contact with cells and synchronization with FPC and conductive busbars for efficient temperature and voltage data transfer, eliminating the need for traditional fixing structures and enhancing assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional NTC fixing structure is designed on plastic support, then NTC can be fixed, but molding difficulty increases and assembly becomes complex due to insufficient space
Solution Approach 1:
The device is segmented into distinct functional modules: the base plate handles NTC mounting and electrical connection, while the support structure provides mechanical support. This separation eliminates the need for complex integrated designs on the plastic support, reducing molding difficulty while maintaining fixing reliability.
Solution Approach 2:
The base plate acts as an intermediary component between the NTC and the support structure. It provides a dedicated platform for NTC mounting and electrical connection, simplifying the overall design by concentrating multiple functions in one component rather than integrating them into the plastic support.
2Reliability
If complex NTC fixing structure is designed, then NTC can be fixed securely, but assembly difficulty increases due to insufficient space
Solution Approach 1:
By separating the NTC fixing function into a dedicated base plate module, the assembly process becomes simpler and more straightforward, eliminating the need to navigate complex integrated structures during assembly while maintaining secure NTC fixation.
3Productivity
If base plate is used for temperature and voltage collection, then labor cost is reduced and assembly is automated, but new structure must be implemented
Solution Approach 1:
The base plate merges multiple functions into a single component: mechanical support for NTC, electrical connection interface, and temperature collection platform. This consolidation enables automated assembly processes while reducing the number of separate parts, thereby improving productivity without significantly increasing overall structural complexity.
Solution Approach 2:
The base plate serves multiple purposes simultaneously: it provides mechanical support, enables electrical connections, and facilitates temperature collection. This multi-functionality reduces the need for additional components and simplifies the assembly process, making it suitable for automated manufacturing while maintaining structural efficiency.
4Measurement precision
If NTC is encapsulated and directly contacted with cell, then temperature collection accuracy is improved, but manufacturing process becomes more complex
Solution Approach 1:
The encapsulating structure uses a thin, flexible design that closely conforms to the cell surface, enabling direct thermal contact for accurate temperature measurement. This thin-film approach minimizes thermal resistance while maintaining structural integrity, achieving high measurement precision without significantly complicating the manufacturing 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 solution simplifies the assembly process, reduces labor costs, provides accurate temperature collection, and improves heat dissipation, while ensuring stable data transmission and rapid assembly through welding and encapsulation.
Implementation Method 1
an NTC, the NTC being integrally connected to the connecting surface
Implementation Method 2
the base plate provides a good heat dissipation and a more accurate collection of the temperature of the cell
Implementation Method 3
By welding the base plate with the FPC, stable data transmission is achieved, and the collected temperature and voltage signals are transmitted. By welding the base plate with the conductive busbar, the welding stability is improved, and the welding speed is fast
Data Source
AI summary
Disclosed in the present disclosure is a temperature collecting device, CCS assembly and a battery module, including a base plate, the base plate including an exposed surface and a connecting surface opposite to the exposed surface, the connecting surface being arranged to be electrically connected to an FPC; an NTC, the NTC being integrally connected to the connecting surface; and an encapsulating structure, the encapsulating structure being integrally connected to the connecting surface to fully cover the NTC, the encapsulating structure being arranged to be in contact with a surface of an object to be temperature-measured.