A blogger from the Strange Parts channel posted a video in which he told and showed the process of assembling Chinese batteries for the iPhone.
We strongly recommend that you watch the entire movie in order to imagine exactly which parts can be delivered to our devices. This have not happened before.
Below is a brief excerpt for those who do not want to watch the video
How to create batteries for the iPhone
Chemical elements are mixed here to create a special coating.
It all starts with the fact that huge mixers mix lithium cobalt oxide with a binder and a conductive substance in special drums, and then transfer the resulting composition to the next room.
It is produced coating aluminum plates, the creation of which is controlled in eight temperature sections: the resulting material is gradually heated and evenly cooled.
Then it goes through several stages of analysis using various instruments, for example, through an “X-ray inspection” – a series of equipment for diagnosing uniformity of coating on a plate.
After a successful check, the plate is sent to the anode-mechanical cutting workshop, where it is divided into several parts and passes a CCD-test (Visual Inspection with a Camera) to detect visible defects on the coating.
The plate is cut into several parts
The resulting “scraps” are connected by a special machine to each other, an insulated electrode layer is created between them, and at the same time maximum dust removed. The latter is done constantly at almost all stages.
The finished material goes through several stages of processing and modification, including the creation of some kind of vacuum packaging, into which the electrolyte is subsequently injected and air is completely pumped out.
This machine automatically assembles a one-piece battery from several parts.
The machine glues batteries with stickers and removes all dust that forms.
The final battery is left in a special room on 48 hours at 44 degrees.
Next stage – first battery charge. During it, each battery is compressed by the press to avoid arbitrary swelling (it happens with a high probability). Energy filling up to 50% occurs within two hours.
After that, the part filled with gas is cut off from the battery on special automated devices.
Ready-made batteries are placed in containers and carefully transferred to another workshop
Clips for charging batteries and maintaining constant voltage
The resulting cells are placed in separate clips that charge and discharge the batteries and maintain a constant voltage. In 7 hours, the device charges up to 100%, discharges up to 0% and recharges up to 50%.
Final stage – battery stability check. After checking the voltage level, the batteries are placed in a separate storage for 5 days (3 days at high temperature and 2 days at normal). And voltage is measured again.
Once the battery is ready, it goes to another factory in Shenzhen.
Worker checks the clarity of the inscriptions
A fragment of a machine for creating and testing a power management system
Workers pack batteries for shipment
There, identification marks and text about quality and production are applied to the devices. As well as technical interspersions of the power management system.
At the final stage, factory workers manually check whether the iPhone reads all the necessary information about the battery (voltage, serial number, etc.).
Then it is sealed and sent to the client. Before delivery, a special camera reads the QR code on the device and enters it into the database.
You can fully familiarize yourself with the assembly process in the video above. It lasts 28.5 minutes.