Electrochemical cell
First Claim
1. An electrochemical cell comprising paired electrodes having a positive electrode and a negative electrode, a separator for separating the positive electrode and the negative electrode, an electrolyte, a concave vessel for containing the paired electrodes, the separator and the electrolyte, and a sealing plate for sealing the concave vessel in which a metal layer is disposed the edge of the concave vessel, and the concave vessel and the sealing plate are bonded by resistance welding.
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Accused Products
Abstract
For avoiding problems in existent non-aqueous electrolyte cells or electric double layer capacitors of a rectangular pyramidal shape that sealing at high reliability can not be attained unless a bonded portion has a margin of a certain degree in view of electrolytes contained therein, a metal layer comprising a metal ring and a brazing material having a heat expansion coefficient approximate to that of a concave vessel of a non-aqueous electrolyte cell or an electric doceble layer capacitor is disposed to the edge of the vessel, a sealing plate made of a metal having a property similar with the metal ring and having a brazing material layer at the bonded surface is also used for the sealing plate and, further, paired electrodes comprising a positive electrode and a negative electrode, a separator and an electrolyte are contained in the concave vessel, the sealing plate is placed on the vessel and seam welding is conducted by using a resistance welding method thereby capable of attaining sealing at high reliability.
45 Citations
14 Claims
- 1. An electrochemical cell comprising paired electrodes having a positive electrode and a negative electrode, a separator for separating the positive electrode and the negative electrode, an electrolyte, a concave vessel for containing the paired electrodes, the separator and the electrolyte, and a sealing plate for sealing the concave vessel in which a metal layer is disposed the edge of the concave vessel, and the concave vessel and the sealing plate are bonded by resistance welding.
Specification