Patent Application
20070015051
The present invention is related to a secondary battery, especially to a secondary battery manufactured by the print circuit board (PCB) process, and utilizing the double-sided copper foil of copper clad laminate (CCL) as the material of positive and negative electrodes of the secondary battery.
The used secondary battery structure like rechargeable lithium battery and nickel metal hydride utilizes a metallic package of a closed shell to seal the battery composition like the positive electrode, negative electrode, isolation membrane and electrolyte into the metallic shell. It therefore limits the secondary battery structure and fails to use the PCB process to manufacture the secondary battery. Again, the positive and negative electrodes used in the conventional secondary battery structure have not disclosed the present invention's double-sided copper foil of CCL structure.
The inventor investigating the positive and negative structure of the secondary battery by utilizing a similar double-sided copper foil of CCL is then convenient to manufacture the secondary battery in the PCB process.
The present invention is to provide a secondary battery manufactured by the PCB process and utilize the double-sided copper foil of copper clad laminate (CCL) as the material of positive and negative electrodes of the secondary battery.
To achieve the above purpose, the present invention provides a secondary battery comprising the secondary battery core component which comprises the positive electrode, isolation membrane, and negative electrode, wherein the positive electrode, isolation membrane and negative electrode are laminated in sequence, and the positive again comprises at least the first substrate which is respectively covered by the first thin metal layers on both the top side and bottom side; the negative electrode comprises at least the second substrate which is respectively covered by the second thin metal layers on the top side and bottom side; the package shell is the PCB material and encloses the secondary battery core component; the electrolyte is filled inside the enclosed space of the package shell.
In order to make the people familiar with the art understand the objects, characteristics and improvements, the present invention is described in details by way of the following embodiments and attached figures.
These and other modifications and advantages will become even more apparent from the following detained description of a preferred embodiment of the invention and from the drawings in which:
The present invention secondary battery 10 is emphasized on the structures of positive electrode 111 and negative electrode 115, first referring to
According to the disclosed structure of the present invention secondary battery 10, those disclosed embodiments or other possible embodiments practiced by the people who are skilled in the art to produce the rechargeable lithium battery, nickel metal hydride or lithium polymer chargeable batteries based on the embodiment of secondary battery 10 are within the scope of the present invention. Taking the embodiment of rechargeable lithium battery as one example, the present invention's positive electrode 111 comprises, except the above first substrate 1111 and first thin metal layers 1113, the active material of LiCoO2 or LiMn2O4. Again, the present invention's negative electrode 115 comprises, except the above second substrate 1151 and second thin metal layers 1153, the carbon active material. Then, piling-up positive electrode 111, isolation membrane 113 and negative electrode 115 from top to down in sequential lamination forms a structure, meanwhile, choosing positive electrode 111, isolation membrane 113 and negative electrode 115 with flexible physical property is possible to roll up to produce secondary battery core component 11. In case of choosing positive electrode 111, isolation membrane 113 and negative electrode 115 without flexible physical property, it is possible to laminate the positive electrode 111, isolation membrane 113, negative electrode 115, isolation membrane 113, positive electrode 111, isolation membrane 113, negative electrode 115 . . . into a secondary battery core component 11.
Although the present invention has been disclosed one embodiment as the above, it does not imply to limit the present invention, any person who is skilled the art could make any change or modification within the spirit and scope of the present invention, however, it is belongs to the scope of the present invention, the protective scope of the present invention is defined by the following claims.
