Abstract: A stacking device may include a negative delivery structure, a separator delivery structure, a first heater and a positive delivery structure. The negative delivery structure may be configured to deliver a negative electrode sheet. The separator delivery structure may be configured to deliver separators to two sides of the negative electrode sheet such that the separators are attached to the negative electrode sheet. The first heater may be arranged downstream of the separator delivery structure and configured to heat the negative electrode sheet and the separators. The positive delivery structure may be arranged downstream of the first heater and configured to deliver positive electrode sheets to the two sides of the negative electrode sheet such that the positive electrode sheets are attached to the separators.

Abstract: The present disclosure provides an antenna, a wireless signal processing device, and an unmanned aerial vehicle. The antenna includes: a substrate having a flat first surface; a first radiation portion disposed on the first surface of the substrate, the first radiation portion comprising a first radiator and a second radiator, and the second radiator being located behind the first radiator; and a second radiation portion disposed on the first surface of the substrate. The second radiation portion includes: a third radiator; and the third radiator being disposed proximate to the second radiator and having a proximate frequency and radiator arm effective length to couple the third radiator with the second radiator. The antenna adopts reasonable wiring and structural design and can be implemented on a base material with a small volume.

Abstract: Provided are an electrode assembly, a battery cell, a battery and an electrical device, belonging to the technical field of battery manufacturing. The electrode assembly comprises: a first electrode sheet, comprising a plurality of bending segments and a plurality of stacking segments arranged in layers, wherein each bending segment is configured to connect two adjacent stacking segments, the first electrode sheet has a first broken seam, and the first broken seam extends in the width direction of the first electrode sheet to break the first electrode sheet; and a plurality of second electrode sheets, wherein the polarity of the second electrode sheet is opposite to the polarity of the first electrode sheet, and each second electrode sheet is arranged between two adjacent stacking segments in the stacking direction of the plurality of stacking segments.

Abstract: The present disclosure relates to the field of remote controller technologies and discloses a protective cover for a control stick and a remote controller. The control stick protective cover includes: a first elastic member, where a first accommodation groove is provided in a middle of the first elastic member, and the first accommodation groove is configured to mount the control stick; a second elastic member, arranged around the first elastic member, where the second elastic member is fixed to a panel of the remote controller; and a buffer member, connected between the first elastic member and the second elastic member, where the buffer member is provided with a bent portion.

Abstract: The present disclosure provides an antenna, a wireless signal processing device, and an unmanned aerial vehicle. The antenna includes: a substrate having a first surface and a second surface opposite the first surface; a first radiator and a second radiator disposed on the first surface, the first radiator and the second radiator facing opposite each other, the first radiator being located at one end near a head of the substrate, and the second radiator being located at one end near a root of the substrate; a third radiator disposed on the second surface, the third radiator being mirror symmetric with a portion of a structure of the first radiator and conducting with the second radiator, so that the first radiator, the second radiator and the third radiator form a coupled resonance point; and a feed line connected with the first radiator, the second radiator and the third radiator.

Abstract: The present disclosure provides a dual-band external antenna for an unmanned aerial vehicle (UAV) and a UAV. The dual-band external antenna for the UAV includes a substrate, a low-frequency oscillator region, a high-frequency oscillator region, a feed coaxial line and ground terminals. Two ground terminals are respectively electrically connected to a feed terminal of the feed coaxial line. An avoidance region for arranging the feed coaxial line is disposed in the low-frequency oscillator region or the high-frequency oscillator region. The low-frequency oscillator region includes a first low-frequency oscillator region and a second low-frequency oscillator region. The high-frequency oscillator region includes a first high-frequency oscillator region and a second high-frequency oscillator region that are vertically asymmetrically disposed on the front and back sides of the substrate.

Abstract: A blade driving apparatus configured to drive a blade of a cutting device to cut a web and includes an anvil and a slide assembly. The slide assembly includes a slide rail and a slide block that are slidably connected to each other. The slide block is connected to the anvil, and the slide block and the anvil move back and forth relative to the slide rail along a travel direction of the web. At least one of the slide rail or the slide block is made of a non-metallic material.

Abstract: A coupling apparatus for coiled tubings of different diameters includes a bottom joint, a top joint, and a back cap, where a gapped slip sleeve is provided on a fitting ring groove on an outer side of an upper portion of the bottom joint, and the gapped slip sleeve is coupled with the bottom joint via a rotation preventing element capable of preventing radial rotation of the gapped slip sleeve.

Abstract: Disclosed is a coupling apparatus for coiled tubings of different diameters, an installing method for the coupling apparatus, and an installing method for tubings of different diameters. The coupling apparatus includes a bottom joint, a top joint, and a back cap, where a gapped slip sleeve is provided on a fitting ring groove on an outer side of an upper portion of the bottom joint, and the gapped slip sleeve is coupled with the bottom joint via a rotation preventing element capable of preventing radial rotation of the gapped slip sleeve. The coupling apparatus allows for easy installation and simple maintenance, and coupling coiled tubings of different diameters at the same wellhead with less difficulties, and provides enhanced resistance to tension and torque to avoid piercement and improve safety. The installing method includes retaining the top joint with a large diameter coiled tubing.