Battery Cell Temperature Collector With Encapsulated NTC Assembly
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Solution Overview
Problem
The existing methods for collecting cell temperatures in batteries, such as FPC welding for SMT temperature sensors, require complex NTC fixing structures on plastic supports, leading to increased molding difficulties and assembly challenges due to insufficient space.
Innovation Solution
A temperature collecting device comprising a base plate with an exposed and connecting surface, where the NTC is integrally connected to the connecting surface and encapsulated by an encapsulating structure, allowing for direct contact with the cell surface for temperature measurement, thus eliminating the need for a traditional NTC fixing structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex NTC fixing structure is designed on the plastic support, then the NTC can be fixed, but the molding difficulty of the plastic support increases and assembly becomes difficult due to insufficient space
Solution Approach 1:
The device is segmented into functionally independent components: the base plate handles NTC mounting and electrical connection, while the plastic support focuses on structural support and FPC mounting. This segmentation eliminates the need for complex NTC fixing structures on the plastic support, resolving the contradiction between fixing reliability and structural complexity
Solution Approach 2:
The base plate serves as an intermediary component that mediates between the NTC and the plastic support. It provides a dedicated platform for NTC mounting with appropriate space and fixing structures, while the plastic support maintains its simplified structure for support and FPC mounting functions
2Reliability
If a complex NTC fixing structure is designed on the plastic support, then the NTC can be fixed, but the assembly difficulty increases due to insufficient space
Solution Approach 1:
By separating the NTC fixing function into a dedicated base plate, the assembly process is simplified. The base plate can be pre-assembled with the NTC, then mounted as a complete unit to the plastic support, eliminating complex space-constrained assembly operations
Solution Approach 2:
The NTC is pre-mounted on the base plate before final assembly to the plastic support. This preliminary action allows for easier NTC positioning and fixation in the dedicated base plate structure, avoiding difficult assembly operations in the constrained space of the plastic support
3Productivity
If the NTC is directly connected to the base plate with encapsulating structure, then automatic assembly is achieved and labor cost is reduced, but the structure becomes more complex
Solution Approach 1:
The base plate integrates multiple functions: NTC mounting, electrical connection terminal, and heat dissipation structure. The encapsulating structure combines protection and electrical isolation functions. This merging enables automatic assembly through standardized connections while the functional integration justifies the moderate increase in device complexity
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, and enhances temperature measurement accuracy and heat dissipation by allowing automatic assembly and direct contact with the cell surface.
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
Data Source
Figure 1~2
Figure 3
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.