Electrochemical device and production method thereof

An electrochemical device, comprising:

• a first unit having a first anode, a first cathode, a single continuous separator provided between the first anode and the first cathode and folded so as to be arranged on an opposite side of the first anode to the first cathode and on an opposite side of the first cathode to the first anode, a second cathode arranged on the outer peripheral surface of the separator so as to oppose the first anode with the separator interposed therebetween, and an electrolyte in contact with the separator, the first anode, the first cathode and the second cathode, the separator having a shape that surrounds the periphery of the first anode or the first cathode by being folded in the same direction at two folds consecutive from one end of the separator;
• a second unit having a first anode, a first cathode, a single continuous separator provided between the first anode and the first cathode and folded so as to be arranged on an opposite side of the first anode to the first cathode and on an opposite side of the first cathode to the first anode, a second anode arranged on the outer peripheral surface of the separator so as to oppose the first cathode with the separator interposed therebetween, and an electrolyte in contact with the separator, the first anode, the first cathode and the second anode, the separator having a shape that surrounds the periphery of the first anode or the first cathode by being folded in the same direction at two folds consecutive from one end of the separator,
• the electrochemical device having a structure in which the first unit and second unit are alternately laminated.

A production method for an electrochemical device provided with a first anode, a first cathode, a single continuous separator provided between the first anode and the first cathode and folded so as to be arranged on an opposite side of the first anode to the first cathode and on an opposite side of the first cathode to the first anode, and an electrolyte in contact with the separator, the first anode and the first cathode, the separator having a shape that surrounds the periphery of the first anode or the first cathode by being folded in the same direction at two folds consecutive from one end of the separator,

• the method comprising:
• a first arrangement step, in which one of either the first anode or the first cathode is arranged on a surface between the two folds in the separator,
• a first folding step, in which the separator is folded at one of the folds and the folded separator is arranged on the first anode or first cathode arranged in the first arrangement step,
• a second arrangement step, in which the other first anode or first cathode is arranged on the folded separator, and
• a second folding step, in which the separator is folded at the other fold and the folded separator is arranged on the first anode or first cathode arranged in the second arrangement step.