Battery Cell Stacking Drum for High-Speed Precise Positioning
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Solution Overview
Problem
Existing methods for forming stacks of electrochemical cells in electric batteries struggle to achieve high operating speed while maintaining high working quality, particularly in ensuring accurate positioning and rejecting faulty cells.
Innovation Solution
A stacking unit and method that utilize a continuous belt system with precise cutting and alignment mechanisms, including suction seats, sensor devices, and cam actuation systems, to efficiently stack and position electrochemical cells, with separate storage units for standard and terminal cells to decouple production from stacking, ensuring compliance and precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a continuous belt system with cutting and alignment mechanisms is used to achieve high operating speed, then productivity increases, but device complexity increases
Solution Approach 1:
The stacking unit is divided into multiple independent modules: a continuous belt system for cell transport, a separate cutting device for terminal cells, alignment mechanisms with cam actuation, and distinct storage units for standard and terminal cells. This segmentation allows each module to operate independently at high speed while maintaining overall system coordination, resolving the contradiction between productivity and device complexity.
Solution Approach 2:
Standard and terminal cells are stored in separate storage units before stacking begins. The cutting device pre-cuts terminal cells from the continuous belt, and alignment mechanisms pre-position cells using cam actuation. These preliminary actions enable high-speed stacking without real-time complexity, as cells are prepared in advance for immediate assembly.
2Manufacturing precision
If separate storage units for standard and terminal cells are used to decouple production from stacking, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The system separates standard cells and terminal cells into different storage units (48, 49) with dedicated feeding mechanisms. This segmentation ensures that each cell type is handled by specialized components, improving positioning accuracy by eliminating mixing errors while keeping the complexity manageable through modular design.
Solution Approach 2:
The storage units act as intermediary buffers between cell production and stacking operations. This decoupling allows production and stacking to proceed independently at their optimal speeds, with the storage units mediating the transfer and ensuring precise cell delivery to the stacking position without real-time coordination complexity.
3Reliability
If sensor devices and cam actuation systems are used for precise positioning and fault rejection, then reliability improves, but device complexity increases
Solution Approach 1:
Sensor devices are integrated into the stacking unit to detect cell positioning and identify faulty cells in real-time. The sensors provide feedback to the control system, which automatically adjusts the cam actuation mechanisms to correct positioning errors or reject defective cells. This closed-loop feedback ensures high reliability while keeping the control logic centralized to manage complexity.
Solution Approach 2:
The stacking unit incorporates automatic fault detection and rejection capabilities through sensor devices that identify defective cells and trigger their removal without human intervention. The cam actuation systems self-adjust to maintain precise positioning based on sensor feedback, enabling the system to service itself and maintain high working quality without adding proportional complexity to the control architecture.
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 enables high-speed stack formation with accurate cell positioning and effective rejection of faulty cells, ensuring all cells meet specifications and maintaining high working quality by decoupling production and stacking processes.
Implementation Method 1
a plurality of suction seats (15) arranged on the feeding drum (12) so as to be movable with respect to the feeding drum (12)
Data Source
AI summary
Stacking unit and stacking method for forming a stack of electrochemical cells of an electric battery. The following are provided: a forming container configured to receive in succession the single electrochemical cells which are arranged successively one on top of the other to form the stack; at least one gripping head configured to receive and retain an electrochemical cell; a drum which is rotatably mounted around a rotation axis for cyclically advancing the gripping head along a circularly shaped transfer path; a gripping station which is arranged along the transfer path and is configured to feed a single electrochemical cell to the gripping head; and a release station which is arranged along the transfer path downstream of the first gripping station and is configured to release, from the first gripping head a single electrochemical cell into the forming container.