| 摘要 |
The invention provides a cylindrical secondary battery which includes a cylindrical housing, an electrolyte, a roll core and two end covers for sealing and covering two ends of the housing; openings are formed on the two end covers; two end posts with external threads are respectively exposed from the openings of the two end covers and arranged at the two ends of the roll core; the external threads of the two end posts are screwed with screw caps; and the two end posts are electrically connected with the positive plate and the negative plate of the roll core respectively. The cylindrical secondary battery arranges the two end posts at the two ends of the roll core, and realizes the fixed connection of the housing, the roll core and the end covers through screwing the screw caps on the twoend posts, the structure is reasonable, and the installation is convenient; besides, the two end posts which are electrically connected with the positive plate and the negative plate of the roll corerespectively can be directly used as the positive end and the negative end of the battery, so that neither the positive end nor the negative end of the battery is needed to be additionally arranged on the end covers of the battery. |
