Battery Cell Activation Tray With Fluid Plate for Uniform Temperature
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Solution Overview
Problem
Conventional battery cell trays experience temperature deviation issues during the activation process, leading to capacity deviations and reduced defect selection capability in mass-produced lithium secondary batteries.
Innovation Solution
A battery cell activation tray with a tray main body, a lower plate featuring a main flow path for fluid circulation, and a temperature controller to regulate the temperature of battery cells, using thermal conductive materials and side surface plates to enhance heat transfer and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a polymer material with low thermal conductivity is used for the battery tray, then the tray weight is reduced and ease of transfer is improved, but temperature deviation between battery cells increases
Solution Approach 1:
A thermal management plate is introduced as an intermediary component between the polymer tray and the battery cells. This plate has high thermal conductivity and serves as a heat transfer mediator, distributing thermal energy uniformly across all battery cell positions while the polymer tray maintains its lightweight properties for easy transfer.
Solution Approach 2:
The tray system uses composite material construction combining polymer material for the tray structure (providing lightweight and electrical insulation properties) with a metal thermal management plate (providing high thermal conductivity). This composite approach allows simultaneous achievement of easy transfer and uniform temperature distribution.
2Productivity
If multiple battery cells are accommodated in the tray, then productivity is improved through simultaneous processing, but temperature uniformity deteriorates
Solution Approach 1:
The thermal management plate acts as a thermal intermediary that couples all battery cells to a common heat sink/source. This allows simultaneous processing of multiple cells while maintaining uniform temperature distribution across the entire tray, resolving the conflict between high productivity and temperature uniformity.
3Productivity
If battery cells are processed simultaneously in mass production, then productivity increases, but temperature control precision decreases
Solution Approach 1:
The thermal management plate serves as a precision temperature control intermediary by providing a high-thermal-conductivity pathway that equalizes temperature across all battery cells during simultaneous processing. This enables mass production while maintaining precise temperature control, as the plate acts as a thermal equilibrium distributor.
Solution Approach 2:
The system changes the thermal conductivity parameter of the interface between the tray and battery cells by introducing the metal thermal management plate. This parameter change enables precise temperature control during mass production, as the high thermal conductivity ensures rapid heat distribution and temperature equalization across all cells.
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
The solution effectively controls the temperature of battery cells, reducing temperature deviations and improving the selection of defective cells by maintaining a uniform temperature range during the activation process.
Implementation Method 1
a lower plate located under the tray main body and having a main flow path to allow a fluid to move therethrough; and a temperature controller fluidly connected to the main flow path to control a temperature of the fluid introduced into the main flow path
Data Source
AI summary
A battery cell activation tray includes a tray main body including a plurality of accommodation grooves configured to receive a plurality of battery cells therein, the tray main body having an upper portion that is open, a lower plate located under the tray main body, the lower plate having a main flow path to allow a fluid to move therethrough, and a temperature controller fluidly connected to the main flow path to control a temperature of the fluid introduced into the main flow path. The fluid is introduced into the main flow path in the lower plate to control a temperature of the plurality of battery cells accommodated in the accommodation grooves of the tray main body.