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Avoiding Hazards
Case Study and Explanation
To store batteries, place each of the batteries in the sections provided on the designated tray in such a way that they will not make contact with one another.
Ignition Generating Heat
2,000 new batteries were taken out from the 20-piece tray containers and thrown randomly into a cardboard box where they were stacked on top of one another. About 30 minutes later, smoke was seen emanating from the batteries followed by ignition several minutes after that. Case study: Ignition of batteries stacked together 21 cylindrical type lithium batteries with tab terminals were placed in a 20 piece tray--one battery more than the capacity of the 20-piece tray shown in the fi gure--two of the batteries were placed together with their poles reversed. As a result, the tab terminals came into contact with each other, causing external shorting, and the temperature of the two batteries rose dramatically, generating heat and causing the halon tubes to burst.Since two batteries were placed in a space (indicated by ) allocated to one battery, their terminals made contact with each other, and external short-
ing resulted.
Rupture
Avoiding Hazards and Preventing Quality Problems This particular case involves batteries which were packed in trays and destined for OEMs. The batteries were packed in an intermediate package consisting of 10 trays with each tray containing 20 (or 40) batteries, and the trays were stacked on top of each other. The intermediate package (of the 10 trays) was opened at the distribution stage of our operations, and fi ve of the trays were delivered to one customer. Since the trays were stored at an angle inside the box, the batteries fell out of their positions on the trays and became stacked up on the bottom inside the small box. As a result, some of the batteries burst.Case study: Bursting of batteries stacked on top of one anotherTo store batteries, place each of the batteries in the sections provided on the designated tray in such a way that they will not make contact with one another. an enlargement Generating heat and deterioration of capacity
Chapter 6 Chapter 6- 86