Sealing structure for an alkali battery having a gate on an aperture side of a sealing element

A method of producing an alkali battery comprising the steps of:

• providing a battery casing having a first end, and a second end with an aperture;
• molding a sealing element having an insertion hole extending from a first side, which is an outer side, to a second side, which is an inner side, by injecting resin through an injection gate on the first side;
• inserting a negative electrode current collector into the insertion hole of the sealing element;
• inserting the negative electrode collector and the sealing element in the aperture end of the battery casing;
• inserting a negative electrode terminal plate in the aperture end of the battery casing adjacent the negative electrode current collector;
• bending a rim of the aperture of the battery casing inwards and crimping the rim to seal the aperture of the battery casing;
• providing a negative electrode gel in the battery casing;
• providing a positive electrode mixture in the battery casing;
• providing a separator between the negative electrode gel and the positive electrode mixture;
• and
• providing the insertion hole of the sealing element on a side contacting the negative electrode gel being constituted by a curved hole rim chamfered in radius shape, wherein the first side of the sealing element is closer to the aperture of the battery casing than the second side of the sealing element.

An alkali battery comprising:

• a battery casing having a first end, and a second end with an aperture;
• a sealing element having an insertion hole;
• said sealing element having a first side and a second side;
• said sealing element being formed using an injection gate of the first side;
• a negative electrode current collector disposed in the insertion hole of the sealing element;
• said negative electrode current collector and said sealing element disposed in the aperture end of the battery casing;
• a negative electrode terminal plate disposed in the aperture end of the battery casing adjacent the negative electrode current collector;
• and
• said aperture end of the battery casing being bent inwards and crimped to seal the aperture of the battery casing, wherein the first side of the sealing element is closer to the aperture of the battery casing than the second side of the sealing element and the second side of the sealing element is in contact with an electrolyte.

An alkali battery comprising:

• a battery casing having a first end, and a second end with an aperture;
• a sealing element having an insertion hole;
• said sealing element having a first side and a second side;
• said sealing element being formed using an injection gate on the first side;
• a negative electrode current collector disposed in the insertion hole of the sealing element;
• said negative electrode current collector and said sealing element disposed in the aperture end of the battery casing;
• a negative electrode terminal plate disposed in the aperture end of the battery casing adjacent the negative electrode current collector;
• said aperture end of the battery casing being bent inwards and crimped to seal the aperture of the battery casing;
• a negative electrode gel disposed in the battery casing;
• a positive electrode mixture disposed in the battery casing;
• a separator disposed between the negative electrode gel and the positive electrode mixture;
• and
• the insertion hole of the sealing element on a side contacting the negative electrode gel being constituted by a curved hole rim chamfered in radius shape, wherein the first side of the sealing element is closer to the aperture of the battery casing than the second side of the sealing element.