Laminated lithium battery cell and lamination equipment

Abstract

The invention discloses a laminated lithium battery cell and lamination equipment. The laminated lithium battery cell comprises an anode isolating membrane, an anode pole piece, a cathode isolating membrane and a cathode pole piece which are arranged in sequence, wherein the anode pole piece and the cathode pole piece are arranged at an interval, the anode isolating membrane, the anode pole piece, the cathode isolating membrane and the cathode pole piece form a whole and are wound into a cylinder structure, and the cylinder structure is wound into a cylindrical structure; the winding tail end of the anode pole piece is provided with an anode lug, the winding tail end of the cathode pole piece is provided with a cathode lug, the lamination equipment comprises a back plate, a rotating disc, a lamination winding needle, a blanking winding needle, a compression roller, an anode isolating membrane, an anode pole piece conveying belt, a cathode isolating membrane and a cathode pole piece conveying belt, one end of the anode isolating membrane and one end of the cathode isolating membrane are wound on the lamination winding needle, and the other end of the cathode isolating membrane is wound on the blanking winding needle; and electromagnetic sheet clamping jaws for clamping the cathode pole piece and the anode pole piece are respectively arranged above the cathode pole piece conveying belt and the anode pole piece conveying belt. According to the laminated lithium battery cell and the lamination equipment provided by the invention, the winding needle is used for carrying out winding type lamination assembly on the cathode and anode pieces, so the efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery cell processing equipment, in particular to a laminated lithium battery cell and lamination equipment. Background technique [0002] Lithium battery cells are divided into winding cells and laminated cells according to different processing techniques. The production efficiency of winding cells is high, but there are many quality problems, such as lithium deposition due to excessive electrode gaps, and stress on charging and discharging. Inhomogeneity and inconsistent deformation lead to insufficient reaction of battery active materials, lower battery energy density, lower battery cycle performance, and lead to huge safety hazards. Winding batteries have mature and stable processes and high efficiency in small sizes, but in large The stability of the process is not enough for the winding of the pole piece of the same size, and the current laminated battery core solves the problem of winding...

AI Technical Summary

Problems solved by technology

[0002] Lithium battery cells are divided into winding cells and laminated cells according to different processing techniques. The production efficiency of winding cells is high, but there are many quality problems, such as lithium deposition due to excessive electrode gaps, and stress on charging and discharging. Inhomogeneity and inconsistent deformation lead to insufficient reaction of battery active materials, lower battery energy density, lower battery cycle performance, and lead to huge safety hazards. Winding batteries have mature and stable processes and high efficiency in small sizes, but in large The stability of the process is not enough for the winding of the pole piece of the same size, and the current laminated battery core solves the problem of winding the battery core, but due to the complexity of the laminated structure, the equipment efficiency is low, and there is a huge disadvantage in equipment cost. Moreover, the current lamination process requires the thermal lamination of the pole piece and the separator in advance, which requires the separator to be coated with glue, which will negatively affect the electrical performance of the battery

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