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Applying Industrial Cameras to Lithium Battery Production

Mako camera supports visual inspection

With the increasing demand for lithium-ion power batteries, machine vision will play an important role. Allied Vision continues launching new camera products, helping battery manufacturers produce safer and more reliable battery products.

The challenge

The Rapid Growth of China’s Lithium Power Battery Industry

Due to the high demand growth of the lithium battery, battery manufacturers need to maximize production efficiency while ensuring the quality of the battery. In order to improve production efficiency, it is necessary to adapt real-time visual inspection during the entire manufacturing cycle.

Moreover, since lithium batteries are safety-related parts, there are strict requirements that must be adhered to which makes machine vision an inevitable part of production. For example, according to Specification & rules of Lithium-ion Battery Industry published by Ministry of Infomation and Technology of China (MIIT) in 2018, the measurement accuracy of electrode coating thickness and length shall not be less than 2μm and 1mm respectively, and the inspection accuracy of the burr after cutting shall not be less than 1 μm.

The solution

Applying Industrial Cameras to Lithium Battery Production

Generally, the production of lithium batteries involves several steps such as material preparation, electrode manufacturing and notching, cell manufacturing, battery module assembly, and battery packing.

To minimize the cost of the system, a solution consisting of multiple cameras can be applied for high precision dimensional measurement. This solution consists of several lower resolution cameras to capture dimensions of multiple sections of the object. In comparison with the single camera solution, the multi-camera solution can reduce the total cost by up to 50% and will not be limited by the size of object.

However, the multi-camera solution has high requirement on camera stability. This means the camera should have low signal jitter to ensure correct data synchronization so the high precision measurement can be achieved.

 

The benefits

Multi-Camera Solution reduces overall System Cost

In this solution, the client decided to use Allied Vision Mako cameras. Mako is very stable and the triggering signal jitter is lower than 8μs, which can be as low as 5μs in actual running. The PTP feature of Mako cameras can ensure proper multi-camera synchronization. The cost of four Mako G-319B cameras is half of what the high-resolution camera would cost. By adapting this solution, the client tremendously reduced their system cost.

The cost of four Mako cameras is half of what a high-resolution camera would cost.

The camera: Mako G-319

Rich feature set, low price

Mako combines industrial performance and a rich feature set with a small form factor at an affordable price. Its GigE Vision compliant interface enables a reliable connection to your host over long distances up to 100 meters. Power over Ethernet and Trigger over Ethernet allow simplified and cost-optimized system setups with a  single cable solution. With advanced triggering features such as Precision Time Protocol (PTP), Mako cameras can be perfectly synchronized with other devices in a multi-camera system.

Highlights at a glance

  • Save up to 50% of total system cost in comparison to one high-resolution camera.
  • No limitation on object side.
  • PTP feature of Mako cameras can ensure proper multi-camera synchronization.
  • Visual inspection helps improve production efficiency & reduce failure rate