Open tube battery housing
A battery includes a battery case including a housing having side walls defining a first open end and a second open end, the battery case including a separate top cover to cover the first open end of the housing and a separate bottom cover to cover the second open end of the housing; a first electrode located within the case; a second electrode located within the case; a first terminal coupled to the first electrode and exposed outside the case; and a second terminal coupled to the second electrode and exposed outside the case.
1. A method of assembling a battery comprising:
laminating a first electrode material directly to an inner surface of a battery housing having side walls defining a first open end and a second open end;
inserting a second electrode assembly into the battery housing,
attaching a top cover to the battery housing over the first open end;
attaching a first terminal to the top cover such that the first terminal is electrically coupled to the first electrode material;
attaching a second terminal to the second electrode assembly, the second terminal insulated from the battery housing and the top cover; and
attaching a bottom cover to the battery housing over the second open end.
2. The method of claim 1 , wherein laminating includes bonding a sheet of lithium to the inner surface by using a rolling pin extending through both the first open end and second open end of the battery housing.
3. The method of claim 2 , wherein laminating includes partially covering the inner surface of the battery housing such that there is a bare space on the inner surface of the battery housing with no first electrode material at both the first open end and the second open end of the battery housing.
4. The method of claim 1 , wherein the second electrode assembly includes a current collector coupled to the second terminal and active electrode material around the current collector and a separator bag covering bottom and side surfaces of the active electrode material.
5. The method of claim 1 , wherein laminating the first electrode material to the inner surface of the battery housing includes laminating the first electrode material to the side walls of the battery housing such that the first electrode material defines a hollow core within the first electrode material, the hollow core having a cross-sectional shape in a plane perpendicular to a longitudinal axis of the hollow core which is the same as a cross-sectional shape of the battery housing in a plane perpendicular to a longitudinal axis of the battery housing.
6. The method of claim 5 , wherein the second electrode assembly is positioned within the hollow core.
7. The method of claim 1 , wherein the battery housing acts as a current collector for the first electrode material.
8. The method of claim 1 , wherein the first terminal is coupled to the battery housing and the second terminal includes a feedthrough which is insulated from the battery housing.