Abstract: Disclosed is a cleavage flaking type lithium ion battery and a preparation method thereof. The cleavage flaking type lithium ion battery includes a battery shell and a winding electric core; the winding electric core includes a battery pole piece which includes a coating region and a blank region adjacent to the coating region coated with an electrode material, and the blank region is directly connected with the battery shell or with a metal contact on the battery shell. The battery pole piece is directly connected with the battery shell, which omits the traditional process in which pole pieces need to be overlaid and welded with tabs, thereby effectively simplifying the process flow, improving the automation degree of production, avoiding a risk of short-circuit firing caused by a fact that a diaphragm is punctured when the tabs are wrapped in the pole pieces and improving the safety performance of the battery.

Abstract: Disclosed is a square winded button lithium battery, including a positive electrode upper cover, a negative electrode lower cover, an intermediate insulating spacer, and a cell. The cell includes a positive plate, a negative plate, a first diaphragm, and a second diaphragm. After the positive and negative plates are winded, ends are directly welded on the positive and negative electrode upper covers through ultrasonic or laser welding to achieve connection. Tab components are not needed, thus omitting the traditional process of overlapping the tabs and welding them onto the plates, thus effectively simplifying the process and improving the degree of production automation. Furthermore, the risk of short circuit firing caused by punctured diaphragm easily occurring in wrapping tabs is avoided, so as to effectively improve the safety of the battery. In addition, since no tab occupies the interior space of the shell, the energy density in unit volume of the battery is greatly increased.

Abstract: An ornamental strap with charging and data transmitting function is disclosed, The ornamental strap comprises: a data cable; a base; a data connector rotatably connected to the base; and a USB connector; wherein a positioning groove is provided between the data connector and the base; the data cable has one end connected to the data connector, and the other end bent and turned back to connect with the USB connector after passing through the positioning groove. Therefore, the data cable forms a loop at one end of the base such that it can be carried about and will not be lost easily, and further it can be used as an ornament.