Abstract: A cell, formed by winding or stacking a first electrode and a second electrode which are arranged at an interval, and a separator is disposed between the first electrode and the second electrode. The first electrode includes a first current collector, and the first current collector includes a coated region coated with a first active material and an uncoated region without the first active material; the uncoated region is at least partially provided with an insulating layer. The adhesion between the insulating layer and the first current collector is not less than about 0.5 N/m.

Abstract: A secondary battery includes a positive electrode plate. The positive electrode plate includes a current collector and a positive active material layer. The positive active material layer includes a positive active material and a carbon material. The carbon material includes carbon nanotube bundles with a ratio of an average length of the carbon nanotube bundles to an average diameter of the carbon nanotube bundles being in a range of 2.5 to 100. The carbon nanotube bundle includes a plurality of first carbon nanotubes. The carbon nanotube bundles reduce an initial direct-current resistance of the battery, ensure integrity of a conductive network during cycling, effectively reduce the growth of the direct current resistance, and increase the charging speed.

Abstract: A charging method for charging a battery, including the following steps: obtaining a lithium deposition potential of the anode; obtaining a first charging current In at different states of charge (SOC) during an nth charge and discharge cycle based on the lithium deposition potential of the anode, the n is an integer greater than or equal to 0; and during an mth charge and discharge cycle, charging the battery with a second charging current Im, m is an integer greater than n, and Im=k1×In, 0.5?k1?1. The present application also provides an electronic device and a storage medium. The above-mentioned charging method, electronic device and storage medium can quickly charge the battery.

Abstract: An impact resistant wound cell comprises a first electrode plate with a first surface and a second surface. The first surface comprises a first active material area and a first current collector area, the second surface comprises a second active material area and a second current collector area. The first current collector area is located on an inner side of an outermost circle of the wound cell. In the first electrode plate, the second current collector area and the first current collector area are adjacent to and opposite to each other, the first current collector area and the second current collector area are bonded together by a first bonding member. The present disclosure further provides a battery using the wound cell.

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, and an electrolyte, the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer includes a negative electrode active substance, there is specific adhesion strength for the negative electrode active substance, and the electrolyte includes propionate. The electrochemical apparatus has improved high-temperature storage performance and overcharge protection performance.

Abstract: An electrochemical apparatus includes an electrode and an electrolyte. The electrode includes a current collector, an intermediate layer disposed on the current collector, and an active material layer disposed on the intermediate layer. The intermediate layer has a specific area ratio to the active material layer. The electrolyte includes a sulfur-oxygen double bond-containing compound. The electrochemical apparatus has improved direct current internal resistance and safety performance.

Abstract: An electrochemical device includes a positive electrode plate which includes a positive active material layer and a negative electrode plate which includes a negative current collector, a first negative active material layer, and a second negative active material layer. In a length direction, the first negative active material layer includes a first edge and a second edge opposite to the first edge. In the length direction, the second negative active material layer includes a third edge and a fourth edge opposite to the third edge. In the length direction, the positive active material layer includes a fifth edge and a sixth edge opposite to the fifth edge. The third edge protrudes beyond the first edge and the fifth edge in the length direction. A distance between the first edge and the fifth edge in the length direction of the negative electrode plate is less than 2 mm.

Abstract: An electrochemical apparatus includes a positive electrode plate including a positive electrode active material layer, and a negative electrode plate includes a negative electrode current collector, a first negative electrode active material layer, and a second negative electrode active material layer, and the first negative electrode active material layer is provided between the negative electrode current collector and the second negative electrode active material layer. In a length direction, the first negative electrode active material layer has a first edge and a second edge, the second negative electrode active material layer has a third edge and a fourth edge, and the positive electrode active material layer has a fifth edge and a sixth edge. The first edge exceeds the third edge and the fifth edge in the length direction. A distance between the third edge and the fifth edge in the length direction is less than 2 mm.

Abstract: An electrode plate includes a current collector and a membrane, where the membrane includes a primer layer provided on a surface of the current collector and an active substance layer provided on a surface of the primer layer, and the primer layer includes a first binder and a first conductive agent; where adhesion between the membrane and the current collector is greater than or equal to 20 N/m. This electrode plate can alleviate problems in the prior art such as easy film fall-off of the electrode plate due to low adhesion of part of the active material close to the surface of the electrode current collector.

Abstract: An electrolyte includes at least one of a compound of Formula I, a compound of Formula II or a compound of Formula III; and a compound of Formula IV; where, R11, R12, R13, R21, R22, R31, R32, R33 and R34 are independently selected from H, halo, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and substituted or unsubstituted C6-C12 aryl; R41 and R44 are independently selected from H, F, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C6-C12 aryl, Ra—(O—Rb), or (O—Rb); and R42 and R43 are independently selected from Rc—(O—Rd) or (O—Rd). Rb is selected from substituted or unsubstituted C1-C4 alkyl; Ra, Rc and Rd are independently selected from substituted or unsubstituted C1-C4 alkylene, C2-C5 alkenylene, or C6-C12 aryl.

Abstract: A method of a charging battery includes the following steps: charging the battery with a first charging current in an nth charge and discharge cycle, where n is an integer greater than or equal to 0; and charging the battery with a second charging current in an (n+m)th charge and discharge cycle, where m is a preset integer greater than or equal to 1, Ib=k1×Ic, 0.5?k1?1, and Ic is a third charging current, where the third charging current is a smaller one of a first maximum charging current and a second maximum charging current in a same state of charge. This application further provides an electronic apparatus and a storage medium.

Abstract: The present application relates to an electrolytic solution and an electrochemical device using same. The electrolytic solution of the present application comprises a compound containing a —CN functional group and a compound containing a P—O bond. By introducing the compound containing a —CN functional group and the compound containing a P—O bond into the electrolytic solution, an active material can be better protected, thereby effectively improving floatation performance and nailing performance of a battery, and cycle impedance of the battery.

Abstract: A battery including a packaging bag, an electrode assembly, an adapting member, and a sealing member. The electrode assembly is disposed in the packaging bag. The electrode assembly includes a first electrode plate and a first tab, and the first tab is electrically connected to the first electrode plate. A first end of the adapting member is connected to the first tab, and a second end of the adapting member protrudes from the packaging bag. The sealing member is disposed between the adapting member and the packaging bag. In a width direction of the battery, a width of the first tab is greater than or equal to a width of the sealing member.

Abstract: An energy storage device includes a separator, the separator includes a porous substrate, and a porous layer arranged on a surface of the porous substrate. The porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.

Abstract: A negative electrode plate, including a current collector, a first active substance layer, and a second active substance layer located between the current collector and the first active substance layer, where the first active substance layer includes first silicon-based material particles, and the second active substance layer includes second silicon-based material particles, a mass percentage of lithium in the first silicon-based material particles being A % and a mass percentage of lithium in the second silicon-based material particles being B %, where A>B. An electrochemical apparatus is provided, including the negative electrode plate.

Abstract: A battery cell includes an electrode assembly, an outer surface of the electrode assembly includes a first surface, a first side surface, a second surface, and a second side surface, a first end surface and a second end surface. The battery cell further includes: a first adhesive film adhered to the first side surface and extending from the first side surface to the first surface and/or the second surface; and a first adhesive layer adhered to the first surface and extending from the first surface to the second surface through the first end surface, where in a width direction of the electrode assembly, there is a first overlapping portion between the first adhesive film and the first adhesive layer on the first surface and/or the second surface. This application further provides a battery including the battery cell and an electric device.

Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator, and an electrolytic solution. The negative electrode includes a negative active material layer. The negative active material layer includes a silicon material. The electrolytic solution includes fluorocarbonate and cyclic ether. A weight percent of the fluorocarbonate, a weight percent of the cyclic ether, and a unit reaction area of the negative active material layer satisfy a specific relational expression, thereby improving the high-temperature storage performance and the high-temperature cycle performance of the electrochemical device.

Abstract: A battery includes a housing including includes a first housing body and a second housing body mounted on the first housing body, and electrically isolated from each other; a battery cell accommodated in the housing and including a first electrode plate, a second electrode plate, and a separator located between the first electrode plate and the second electrode plate; a first conductive member and a second conductive member forming a conductive structure are accommodated in the housing and electrically isolated from each other. The first conductive member electrically connects the first electrode plate and the first housing body. The second conductive member electrically connects the second electrode plate and the second housing body. The first electrode plate, the separator, and the second electrode plate are wound around the conductive structure to form the battery cell.

Abstract: An electrochemical apparatus includes a positive electrode plate. The positive electrode plate includes a positive electrode current collector, a positive electrode active material layer, and a positive electrode coating layer. The positive electrode current collector includes a first zone, a second zone, and a third zone. The positive electrode active material layer includes a first portion, a second portion, and a third portion that are disposed in the first zone, the second zone, and the third zone, respectively. The positive electrode coating layer includes a fourth portion and a fifth portion that are disposed in the first zone and the second zone, respectively. Combined impedance of the first portion and the fourth portion is greater than impedance of the third portion, and combined impedance of the second portion and the fifth portion is greater than the impedance of the third portion.

Abstract: An anode active material, a secondary battery, and an electrical device. The particles of the anode active material meet the following relationships: 0.1?AR10<0.2, 0.2?AR50<0.4. The width to length ratio of the anode active material is AR10 when a cumulative volume percentage of particles in a volume-based particle size distribution reaches 10%, and the width to length ratio of the anode active material is AR50 when the cumulative volume percentage of particles in a volume-based particle size distribution reaches 50%. The lithium-ion battery containing the anode active material ensures high-energy density (volume, first cycle efficiency, and compacted density) and meets the requirements for the safety, cycle, and cyclic expansion.