A wound electrode assembly includes a positive electrode sheet including a positive electrode winding starting section not provided with positive electrode tabs and a positive electrode winding extension section provided with a positive electrode tab. The positive electrode winding starting section and the positive electrode winding extension section are connected, and the positive electrode winding starting section is wound at least one circle.

A winding method may comprise clamping heads of an anode plate, a cathode plate and a separator between a first half winding needle and a second half winding needle of a winding needle assembly at a winding station; and rotating the winding needle assembly at the winding station to wind the anode plate, the cathode plate and the separator to form an electrode assembly.

A secondary battery may include: an electrode assembly in which first and second electrode sheets are stacked and wound with a separation sheet interposed therebetween, wherein a first electrode tab protrudes in the first electrode sheet, and a second electrode tab protrudes in the second electrode sheet; a battery can to accommodate the electrode assembly therein; and a connection part above or below the electrode assembly and facing the electrode assembly, wherein the connection part has a first area made of an electrically conductive gel material; and a second area attached to the first area and made of an electrically insulating material, wherein the second area forms at least a portion of a top surface of the connection part, and at least a portion of the first electrode tab or the second electrode tab is inserted into the first area of the connection part.

A systems and methods for tracking a position of an electrode. The system may include: a notching controller configured to store pitch information of a unit electrode and to acquire electrode coordinate information of the electrode in a roll-to-roll state during a notching process and a cell identification (ID) of the unit electrode; a calculator configured to calculate coordinates of the cell ID from the pitch information and the cell ID; a roll map generator configured to generate a roll map based on the electrode coordinate information transmitted from the notching controller; and a mapping part configured to compare the coordinates of the roll map with the coordinates of the cell ID to derive an electrode position of the electrode during the electrode manufacturing process from which the unit electrode originates.

Provided are a winding device and a winding apparatus. An inner shaft of the winding device is configured to clamp an electrode assembly; and an outer shaft of the winding device is configured to wind the electrode assembly. The winding device includes: a first slider and a first pusher, where the first slider may reciprocate in a first sliding slot in the first pusher in a first direction, and an extension direction of the first sliding slot is inclined from the first direction such that the first pusher drives a first inner shaft to reciprocate in a second direction, the second direction being perpendicular to the first direction; and a second slider and a second pusher, where the second slider may reciprocate in a second sliding slot in the second pusher in a third direction, and an extension direction of the second sliding slot is inclined from the third direction.

A device and a method for drying a battery separator membrane. The method is mainly by adding a drying device to provide a drying process prior to the lamination in the battery automated manufacturing process, so that in the process of sequentially, stacking the positive, negative electrode plates and the separator membrane in an interval into a battery cell, the drying device is used to continuously dry the separator membrane in advance to ensure that the moisture content of the separator membrane itself is effectively removed. The drying device mainly includes a closed space, and a plurality of sets of rollers at a certain distance from each other is arranged arbitrarily to make the long strip-shaped separator membrane wind around all the rollers to get a fully unfolded state. This couples with the introduction of continuous circulating wind into the closed space to blow the separator membrane to achieve the desired drying effect.

The present disclosure relates to a cable-type secondary battery having improved performance and capable of alleviating stress caused by external force. The present disclosure provides provided a sheet-type electrode assembly which includes: an electrode array including an inner electrode, a first separator, a double-sided electrode, a second separator and an outer electrode stacked successively; and a support layer formed integrally on at least one surface of the electrode array by compression, and a cable-type secondary battery including the same.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.

Computer program product, controller, winding machine and method for winding a winding material from a supply device onto a winding body of a winding machine, wherein the winding material is provided from a supply roller and wound onto the winding body via at least one deflection roller, where an actual winding tension of the winding material is set to a setpoint winding tension depending on a position-dependent compensation signal, stored in a storage unit, to compensate for a changeable free length, resulting from a non-circular cross section of the winding material, of the winding material between the deflection roller and the winding body, whereby due to the fact that the actual winding tension is set to the setpoint winding tension via the position-dependent compensation signal, which is already stored in the storage unit prior to the winding, the computational load for the setting can be reduced.

A method for manufacturing a battery is provided. The method includes suctioning a part of a strip-shaped separator in a plurality of holes of a winding core in a peripheral surface of the winding core; preparing a wound body by winding strip-shaped positive and negative electrodes along with the strip-shaped separator around the winding core; and preparing an electrode body by releasing the suction in the holes and pulling out the winding core from the wound body, in which the battery includes a battery container configured to accommodate the electrode body, the holes are communicated inside with the winging core having a hollow structure, and the winding core has an outside diameter of 2 mm or less.