Resources Contact Us Home
Secondary cell

Image Number 7 for United States Patent #7273678.

A secondary cell comprises an electrode unit housed in a cell can comprising a cylinder having a bottom and a closed opening, and a current collector plate 50 is provided at one end of the electrode unit. The current collector plate 50 has a plurality of protrusions 52 extending radially thereof and joined to an edge of the electrode unit. The surface of the current collector plate 50 to be joined to the bottom wall of the cylinder has a flat region R extending on a predetermined closed-loop track on the surface, and the portions of the current collector plate 50 and the cylinder to be joined are subjected along the flat region R to laser welding from outside the cylinder.

  Recently Added Patents
Perfume bottle
Thermosensitive recording medium
Active and progressive targeted advertising
Tap and linking module TDO register, gating for TCK and TMS
Method and device for synthesizing image
Local access to data while roaming with a mobile telephony device
  Randomly Featured Patents
Nipple grooving device
Wire termination method
Process for separating TI from a TI slurry
Nickel-base alloys and methods of heat treating nickel-base alloys
Nonvolatile semiconductor memory device
Vacuum deposition using pressurized reflow process
Method and apparatus for partial combustion of coal
Counterweight for stands
Orthodontic appliance
Exposure measuring apparatus for photographic cameras