Abstract: The present application relates to field of cathode material, and a cathode material and a method for preparing the same, a lithium ion battery provided, where the cathode material includes an active material having a chemical formula Lia(NixCoyRz)1-bMbO2, where 0.9?a?1.10, x+y+z=1, 0.8?x?0.99, 0?y?0.15, 0?z?0.1, 0?b?0.1; R includes Al and/or Mn, M includes a metal element; and a coating layer on surface of the active material, where the coating layer includes a phosphate compound; the cathode material has a particle hardness of Cs?50 Mpa and satisfies the following: Cs10/Cs50?0.7; where Cs10 is hardness of particles with a particle size D10, and Cs50 is hardness of particles with a particle size D50. The cathode material and method for preparing the same, lithium ion battery provided, which improve coating uniformity, precisely control coating amount, improve rate and cycling performance of lithium ion battery, and reduce production costs.

Abstract: A secure localization method for multi-mobile robots system based on network communication includes: Step 1, establishing a nonlinear dynamic model of a multi-mobile robots system based on network communication; Step 2, designing a secure estimator for the nonlinear dynamic model; Step 3, calculating an upper bound on a one-step prediction error covariance matrix ?i,k+1|k for each mobile robot in the network communication; Step 4, based on ?i,k+1|k, calculating an estimator gain matrix Ki,k+1 for each mobile robot in the network communication; Step 5, substituting the estimator gain matrix Ki,k+1 calculated in Step 4 into Step 2 to obtain a state estimation {circumflex over (x)}i,k+1|k+1 at time k+1; determining whether k+1 reaches a total duration M, that is, if k+1<M, performing Step 6, and if k+1=M, ending; and Step 6, based on Ki,k+1, calculating an upper bound on an estimation error covariance matrix ?i,k+1|k+1 of each mobile robot; let k=k+1, and performing Step 2 until k+1=M is satisfied.

Abstract: The provided are a method, terminal, and system for updating a digital currency wallet, and relates to the field of computer technology. A specific implementation of the method includes: sending, based on user trigger, a query request about whether the digital currency wallet needs to be updated to a trusted platform; receiving a query result returned by the trusted platform; in the case that the query result indicates that the digital currency wallet needs to be updated, withdrawing a digital currency from the digital currency wallet, synchronizing offline transaction data of the digital currency wallet, and sending an update request to the trusted platform; receiving a target update instruction sent by the trusted platform, wherein the target update instruction indicates account data corresponding to the digital currency wallet; and updating the digital currency wallet based on the account data indicated by the target update instruction.

Abstract: The present disclosure relates to a method, terminal and system for splitting, and managing a digital currency in a transaction. The method includes: determining a first transaction request indicating a digital currency and first transaction information; generating second transaction information including a second transaction amount according to the first transaction information; respectively signing the first transaction information and the second transaction information by using a private key of a first terminal; generating a first trust chain according to the signed first transaction information and the digital currency, and generating a second trust chain according to the signed second transaction information and the digital currency; and sending the first trust chain to a second terminal, so that the second terminal and the first terminal achieve, according to the first trust chain, an offline transaction corresponding to the first transaction amount included in the first transaction information.

Abstract: A cathode material and a method for preparing the same, lithium ion battery provided. The cathode material includes secondary particle which includes a plurality of primary particles, where the primary particle includes an active material having a chemical formula LibNixCoyMzRwO2, where 0.95?b?1.10, 0.8?x<1, 0<y+z+w?0.2, x+y+z+w=1, 0.0001?w?0.003; M is selected from at least one of Mn and Al, R is a metal; Phosphate compound coating layer are uniformly distributed on the surface of the cathode material, including a first coating layer and a second coating layer, where the first coating layer forms on the surface of the primary particle, the second coating layer forms on the surface of the secondary particle. The cathode material of this application can effectively improve the rate performance, thermal and cycling stability of lithium battery, and has the characteristics of low cost and easy large-scale production.

Abstract: The present disclosure relates to the technical field of cathode materials, and provides a cathode material and a preparation method therefor, a cathode sheet, and a battery. The preparation method includes the following steps: coating the surface of spherical nickel hydroxide with a lithium compound, a divalent cobalt compound, a trivalent cobalt compound, and an optional compound M, and then carrying out primary sintering on the coated material under an oxygen atmosphere, wherein the molar content of the trivalent cobalt compound in the cobalt compound is 50%-85%.

Abstract: The present disclosure relates to the field of cathode materials, and provides a cathode material and a preparation method thereof as well as a lithium-ion secondary battery, wherein the cathode material comprises: a secondary particle comprising a plurality of primary particles, wherein the primary particles contain an active substance having a chemical general formula of LibNixCoyMzNwO2, where 0.95?b?1.05, 0.8?x<1, 0<y+z?0.2, x+y+z=1, and 0.0001?w?0.003; M is selected from at least one of Mn and Al; N is a metal and a coating layer, which comprises a first coating laver and a second coating laver, wherein the first coating laver is formed on the surface of the primary particles, the second coating laver is formed on the surface of the secondary particles, and both the first coating layer and the second coating laver contain a phosphate compound.

Abstract: Provided is a cathode material, a preparation method thereof, and a secondary lithium battery. The cathode material is characterized in that a chemical formula of the cathode material is LibNi1-x-yCoxAlyMzO2, where 0.95?b?1.10, 0?x?0.15, 0.01?y?0.1, 0<z?0.05, and an M element is a metal element; the M element is distributed in interior and surface of the cathode material, the M element distributed in the interior of the cathode material is presented in a doped form, and the M element distributed in the surface of the cathode material is presented in a form of a coating layer formed of at least one of M oxide or lithium-M composite oxide; and a molar ratio of the M element in the interior to the M element in the surface is greater than 0.5. The cathode material provided has good high-rate capability and thermal stability.

Abstract: A housing structure for an electronic device comprises a support frame, supporting a front, a rear, and a side panel elements of the housing structure such that they are less sensitive to damages.

Abstract: The present invention suggests a flexible board connector having a frame element, which comprises an insertion opening, and a cover element. The frame element is provided and intended for being mounted to a circuit board. The insertion opening is provided and adapted to accept a flexible board, which has at least one conductive contact on a first side thereof. The cover element has at least an opened position and a closed position. When the cover element is in the closed position, the cover element is adapted for exerting a pressure against a second surface of the flexible board, when the flexible board is inserted through the insertion opening into the frame element of the flexible board connector.

Abstract: An electronic module reader including a housing having a receiving area adapted to removably receive an electronic module; electrical signal contacts connected to the housing; and a module detection and ejection pre-warning switch. The switch is adapted to be contacted by the electronic module in the receiving area. The switch is adapted to signal presence and absence of the electronic module in the receiving area, and adapted to signal movement of the electronic module from a home mated position with the electrical signal contacts towards an electrically disconnected position.

Abstract: An electronic module reader including a housing having a receiving area adapted to removably receive an electronic module; electrical signal contacts connected to the housing; and a module detection and ejection pre-warning switch. The switch is adapted to be contacted by the electronic module in the receiving area. The switch is adapted to signal presence and absence of the electronic module in the receiving area, and adapted to signal movement of the electronic module from a home mated position with the electrical signal contacts towards an electrically disconnected position.

Abstract: A connector for connecting circuitry to a surface has a one piece body. The one piece body defines a cavity in which a portion of the circuitry is, in use arranged to be received. The cavity is defined by the one piece body. Fixing means are provided for fixing the connector to the surface.