Dual-Camera Battery Cell Inspection for Coated and Windowed Surfaces
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Solution Overview
Problem
Existing appearance inspection devices for battery cells are limited in versatility and efficiency due to their inability to effectively inspect both fully-coated and windowed battery cells, as they struggle with light reflection from aluminum housings, leading to poor inspection accuracy and reduced manufacturing efficiency.
Innovation Solution
The use of dual camera assemblies, each with specific configurations and adjustments, to adapt to different types of battery cells, including line scan cameras and adjustable mechanisms, ensures effective inspection of both fully-coated and windowed surfaces by switching camera and light source operations based on the cell's coverage by insulating layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single camera assembly is used for inspection, then the device structure is simple, but it cannot effectively inspect both fully-coated and windowed battery cells due to light reflection from aluminum housings
Solution Approach 1:
The inspection device is designed with multiple camera assemblies (first camera assembly for fully-coated cells, second camera assembly for windowed cells) that can be selectively activated based on the battery cell type being inspected. This multi-functionality approach allows a single inspection device to handle different inspection scenarios without requiring separate dedicated devices for each cell type.
Solution Approach 2:
The system dynamically switches between different camera assemblies based on the insulating layer coverage of the battery cell. The control unit determines whether to activate the first or second camera assembly in real-time according to the specific inspection needs, making the system adaptable and flexible rather than static and fixed.
2Measurement precision
If the first camera assembly is used for windowed battery cells, then the device structure is simple, but inspection accuracy deteriorates due to light reflection from aluminum housings
Solution Approach 1:
Different camera assemblies are optimized for different inspection scenarios: the first camera assembly is configured with lighting suitable for insulating layer surfaces, while the second camera assembly is specifically designed for metal housing surfaces with appropriate lighting angles to minimize reflection. Each camera assembly has localized optimization for its specific inspection target.
Solution Approach 2:
The system changes operational parameters (which camera assembly is active) based on the inspection object. When inspecting windowed cells with aluminum housings, the system switches to the second camera assembly which has parameters optimized for metal surface inspection, thereby maintaining high measurement precision.
3Adaptability or versatility
If type switching is implemented in the production line, then manufacturing flexibility is improved, but inspection efficiency decreases due to inability to inspect windowed cells
Solution Approach 1:
The inspection device achieves universality by incorporating both first and second camera assemblies, enabling it to inspect both fully-coated and windowed battery cells within the same production line. This eliminates the need for separate inspection devices for different cell types and maintains high inspection efficiency during type switching.
Solution Approach 2:
The system performs preliminary identification of the battery cell type (fully-coated or windowed) and pre-activates the appropriate camera assembly before inspection begins. This preliminary action ensures that the correct inspection configuration is ready in advance, avoiding delays and maintaining productivity during type transitions.
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 approach enhances the versatility and efficiency of appearance inspection, allowing for accurate detection of defects in various battery cell types, thereby improving manufacturing efficiency and adaptability to different cell sizes and specifications.
Implementation Method 1
a first camera assembly comprising a first camera and a first light source, the first light source being configured to provide illumination to the first camera
Implementation Method 2
a second camera assembly comprising a second camera and a second light source, the second light source being configured to provide illumination to the second camera
Implementation Method 3
the first camera being configured to acquire images of a first surface of the battery cell when the first surface is covered by an insulating layer
Implementation Method 4
the second camera being configured to acquire images of the first surface when at least a partial region of the first surface is not covered by an insulating layer
Data Source
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AI summary
The present application discloses an appearance inspection device and an apparatus for manufacturing a battery cell. The appearance inspection device for inspecting a battery cell comprises: a first camera assembly comprising a first camera and a first light source, the first light source being configured to provide illumination to the first camera, and the first camera being configured to acquire images of a first surface of the battery cell when the first surface is covered by an insulating layer; and a second camera assembly comprising a second camera and a second light source, the second light source being configured to provide illumination to the second camera, and the second camera being configured to acquire images of the first surface when at least a partial region of the first surface is not covered by the insulating layer. According to the technical solutions provided by the present application, the versatility of the appearance inspection device can be improved, thereby improving the battery manufacturing efficiency.