Abstract: This application provides a battery, an electric apparatus, and a method and a device for preparing battery, relating to the field of battery technologies. The battery includes a battery cell having an electrode terminal; a fire prevention pipeline, configured to accommodate a fire prevention medium; and a fastener, configured to fasten the fire prevention pipeline. The fastener is connected to the electrode terminal.

Abstract: A battery, a power consumption device, and a method and device for producing a battery are provided. The battery includes: a battery cell including a pressure relief mechanism configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; and a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium when the pressure relief mechanism is actuated; where the fire-fighting pipeline is covered with an isolation layer, and the isolation layer is configured to block the contact of gases and the fire-fighting pipeline so as not to generate condensate. In a battery provided by the present application the fire-fighting pipeline is covered with an isolation layer, and the isolation layer may be configured to reduce the influence of the condensate on the battery and improving the safety of the battery.

Abstract: A cathode material includes a plurality of first particles. Each first particle includes a secondary particle composed of a plurality of third particles, and the first particle includes a first lithium-containing transition metal oxide; and a plurality of second particles. The second particle includes a fourth particle and/or a secondary particle composed of a plurality of fourth particles, and the second particle includes a second lithium-containing transition metal oxide. The electrochemical device including the cathode material is significantly improved in the aspects of energy density, capacity attenuation and service life.

Abstract: An electrochemical apparatus includes a positive electrode. The positive electrode includes a current collector, a conductive layer, and an active substance layer, with the conductive layer disposed between the current collector and the active substance layer, where the conductive layer includes secondary particles formed from primary particles of a conductive agent, and D50 of the secondary particles satisfies 0.1 ?m?D50?0.4 ?m. The thickness of the conductive layer in the positive electrode of the electrochemical apparatus is less than 1 ?m, effectively increasing the compacted density and energy density of the electrochemical apparatus.

Abstract: A negative electrode includes a negative electrode active material layer, the negative electrode active material layer includes negative electrode active material particles, and the negative electrode active material particle includes a porous portion and a nonporous portion with heteroatoms. The heteroatom includes at least one of element boron, nitrogen, fluorine, phosphorus, or sulfur and is located on an interface, and the interface is a region, in the nonporous portion, formed from a bordering position between the nonporous portion and the porous portion to 0.5 ?m from the bordering position. The porous portion improves the lithium ion intercalation and deintercalation efficiency. In addition, boron, nitrogen, and other elements doped increase the gram capacity of the negative electrode active material, helping increase the energy density of the electrochemical apparatus.

Abstract: An electrochemical apparatus, including a positive electrode plate, the positive electrode plate includes a positive electrode active material. When a state of charge of the electrochemical apparatus ranges from 90% to 100%, a DSC curve of the positive electrode plate has a first exothermic peak A1 and a second exothermic peak A2 in a temperature range of 150° C. to 400° C.; where based on a mass of the positive electrode active material, the first exothermic peak A1 is an exothermic peak closest to 400° C. with a peak intensity greater than 0.1 mW/mg, the second exothermic peak A2 is an exothermic peak closest to 150° C. with a peak intensity greater than 0.1 mW/mg, a difference between a peak position Ta of the first exothermic peak A1 and a peak position Tb of the second exothermic peak A2 ranges from 20° C. to 150° C. The electrochemical apparatus has good cycling, rate, and safety performances.

Abstract: An electrochemical apparatus includes an electrode assembly, a housing assembly, a conductor, and an insulator, where the electrode assembly includes a first tab, the housing assembly includes a first housing with a first through-hole and a second housing, the first housing and the second housing define an accommodating space which accommodate the electrode assembly, the first tab is electrically connected to the conductor, the insulator is located between the first housing and the conductor, the insulator has a second through-hole, in a first direction, a projection of the conductor at least partially falls inside the first through-hole and the second through-hole, the insulator includes a first insulation layer and a second insulation layer, and the first insulation layer is attached to the first housing and located between the first housing and the second insulation layer.

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein about 2.2 wt %?(X+Y)?about 8 wt %, about 0.1?(X/Y)?about 6, 1 wt %?Y<5 wt %, about 5 wt %?Z?about 50 wt %, and about 0.02<(Y/Z)?about 0.3. The electrolyte further includes at least one selected from the group consisting of a cyclic carbonate ester having a carbon-carbon double bond, a fluorinated chain carbonate ester, a fluorinated cyclic carbonate ester, and a compound having a sulfur-oxygen double bond.

Abstract: A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%?(Dv50a?Dv50b)/Dv50b?80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes. The secondary particles of the positive electrode material that meets the foregoing condition can form soft agglomerates, so that the electrochemical device is of high cycle performance and high safety performance.

Abstract: An electrode assembly, including a first electrode plate, a second electrode plate, and a separator. The electrode assembly is formed by winding the first electrode plate, the separator, and the second electrode plate. A first tab formed by a plurality of first tab units and a second tab formed by a plurality of second tab units are disposed on the first electrode plate, and a third tab formed by a plurality of third tab units is disposed on the second electrode plate. The electrode assembly is provided with a multi-tab structure to achieve purposes of enhancing a current-carrying capacity of the battery and reducing a temperature rise.

Abstract: An electrochemical apparatus and an electronic apparatus are disclosed. The electrochemical apparatus includes an electrode plate and a tab, where the electrode plate includes a current collector, a first active material layer, and a first insulation layer. The current collector includes a first region, a second region, and a first portion of a third region, where the first region is provided with the first active material layer, and the second region is provided with the first insulation layer. Along a thickness direction of the current collector, an orthographic projection of the second region at least partially surrounds an orthographic projection of the first portion of the third region. In this way, the electrode plate has a small exposed conductive region. This can reduce the safety risk such as a short circuit risk caused during a needle penetration operation on the electrochemical apparatus.

Abstract: An electrochemical device and an electronic device containing the electrochemical device. With a first accommodation portion disposed in the electrochemical device, a specific accommodation space is provided for a bend portion of a first tab, thereby avoiding a need to additionally increasing space for accommodating the bend portion, where the space is originally intended for accommodating the electrode assembly. This effectively saves the space occupied by the tab in the packaging shell, reduces the size of the electrochemical device, and improves an energy density of the electrochemical device. The electronic device also achieves a high energy density.

Abstract: An electrochemical device includes a positive electrode plate and an electrolytic solution. The electrolytic solution includes a phosphorus additive represented by Formula I: A mass percent of the phosphorus additive represented by Formula I in the electrolytic solution is A %. The electrolytic solution further includes a first additive. The first additive includes at least one of fluoroethylene carbonate or vinylene carbonate. The positive electrode plate includes a positive active material; the positive active material includes an M element; the M element includes at least one of Al, Mg, Ti, or B; a mass percent of the M element in the positive active material is X %; and 0.0001?X/A?40. The electrochemical device is highly stable to thermal shocks.

Abstract: Provided are an adhesive tape attaching device for cell and a manufacturing method for the adhesive tape attaching device for cell. The adhesive tape attaching device for cell includes a tooling plate, an adhesive tape clamping and pulling mechanism, an adhesive tape cutting mechanism, an adhesive tape attaching mechanism, and a driving mechanism. The tooling plate is for carrying a cell; the adhesive tape clamping and pulling mechanism is configured to clamp an adhesive tape and drive the adhesive tape to move in a horizontal direction approaching the cell; the adhesive tape cutting mechanism is disposed in a transportation direction of the adhesive tape, the adhesive tape cutting mechanism is located upstream of the tooling plate, and the adhesive tape cutting mechanism is configured to cut the adhesive tape into adhesive tape segments; the adhesive tape attaching mechanism is configured to attach the adhesive tape segment onto a to-be-attached region.

Abstract: An electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the first current collector includes a first surface and a second surface disposed oppositely; the first surface faces the shell, and includes a coated region coated with a first active material and an uncoated region; the uncoated region includes a first uncoated region disposed at an end of the jelly roll, and the first uncoated region includes alternating bent portions and straight portions; and the bent portions are provided with an insulating layer.

Abstract: A method for preparing an anode, including the step of adding an auxiliary agent with Si—C and Si—O bonds. The method for preparing the anode can reduce defects on a surface of the anode to produce a high-quality anode.

Abstract: An electrochemical apparatus includes a positive electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on a surface of the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material and a conductive agent, the conductive agent containing secondary particles, where a total sectional area S0 of the secondary particles and a sectional area S1 of the positive electrode active material layer satisfy 0<S0/S1?0.1; and diameter D0 of the secondary particles and a percentage by number of secondary particles with the diameter D0 within each range in the secondary particles further satisfy: when 0 ?m<D0?3 ?m, 30%??1?50%; when 3 ?m<D0?10 ?m, 30%??2?50%; and when 10 ?m<D0?18 ?m, 0%??3?20%. Such electrochemical apparatus has good cycling performance in high-temperature environments and therefore has a long service life.

Abstract: An electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The first electrode plate is provided with a first tab and a third tab, the second electrode plate is provided with a second tab, and the first electrode plate, the separator, and the second electrode plate are wound to form the electrode assembly. The first electrode plate includes a first current collector and a first active substance layer. The first active substance layer is disposed on a surface of the first current collector to form a first coating region; the first tab and the third tab are spaced apart from each other in the first coating region, dividing the first coating region into a first part, a second part, and a third part.

Abstract: A winding-type lithium ion battery includes an electrode assembly; the electrode assembly includes a first electrode plate, a separator, and a second electrode plate that are successively stacked and wound; the first electrode plate includes a first current collector and multiple first tabs electrically connected to the first current collector; the second electrode plate includes a second current collector and multiple second tabs electrically connected to the second current collector; the electrode assembly is flat, and a notch S is provided at least one corner of the electrode assembly.

Abstract: A lithium transition metal composite oxide, comprising a twin crystal structure. The twin crystal structure includes a first crystalline region and a second crystalline region. A grain boundary exists between the first crystalline region and the second crystalline region. The first crystalline region includes a first region located within 20 nm from the grain boundary. The second crystalline region includes a second region located within 20 nm from the grain boundary. An angle between a transition metal layer in the first region and a transition metal layer in the second region is 65° to 80°. By adjusting the angle between the transition metal layer in the first region and the transition metal layer in the second region to fall within 65° to 80°, it can improve stability of the twin crystal structure, and in turn, improve the cycle performance of the electrochemical device at a high voltage.