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Battery Swelling System

IP.com Disclosure Number: IPCOM000013164D
Original Publication Date: 2003-Jul-25
Included in the Prior Art Database: 2003-Jul-25

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In charching systems of portable devices like mobile phones, organizers, laptops, handheld computers, GPS-receivers (Global Positioning System), Radios etc. it can happen that batteries swell and explode due to overheating during the recharging process. This invention shows a simple way to protect against such-and-such an explosion. Before the explosion the swelling battery pushes and bends the batterylid (figure 1). This lid is designed in a way that the lock has got two catches. In normal mode the lock is complete closed by the first catch. By the pushing battery the lock jumps to the second catch and therefore opens the lid a bit. It gives the battery more space and prevents an explosion. Figure 2 shows a second solution for a possible protection. The swelling battery presses a mechanical detector which interrupts an electrical contact and stops the charging process and thereby the overheating.