12results about How to "Work safely and efficiently" patented technology

The invention discloses a method, a device and equipment for evaluating the continuous charging performance of a lithium ion battery, and relates to the technical field of power batteries. The method comprises the following steps: calculating the continuous charging performance of the lithium ion battery based on a negative electrode potential safety threshold line and a linear curve of negative electrode potentials and dynamic charging currents of a battery cell at different characteristic charge states at various target characteristic temperatures; determining the maximum charging current of the battery cell in different characteristic charge states at each target characteristic temperature; determining charging performance data of the battery cell based on the maximum charging current of the battery cell in different characteristic charge states at the target characteristic temperature of each temperature interval; and formulating a corresponding continuous charging MAP based on the charging performance data of the battery cell and a double-safety margin dynamic adjustment strategy, and evaluating and verifying the continuous charging performance of the lithium ion battery at the current temperature. Through the mode, the maximum charging current of the battery cell at different temperatures and different charge states is accurately determined, and the continuous charging MAP is formulated.

The invention provides a low-specific-speed centrifugal pump flow channel design method and a low-specific-speed centrifugal pump. The method comprises the following steps that flow channel inlet and outlet parameters are determined according to the rated flow, the rated lift and the rated rotating speed of the low-specific-speed centrifugal pump; the flow channel inlet and outlet parameters comprise impeller inlet and outlet diameters, flow channel inner and outer side fillets, flow channel wrap angles, flow channel inlet and outlet angles and flow channel inlet and outlet section parameters; two ends of a curve are determined through a runner inlet section and a runner outlet section, at least four transition sections are arranged between a runner inlet and a runner outlet, the runner inlet section, the transition sections and the runner outlet section are connected through an arc curve, and the runner trend and shape are determined. According to the invention, the bad flow state in the flow channel can be avoided as much as possible while the energy consumption is reduced. And the working efficiency and long-term safe and stable operation of the low-specific-speed centrifugal pump are ensured.

The invention provides a Mannich ashless dispersant, a lubricating oil composition and application of the Mannich ashless dispersant, the Mannich ashless dispersant and the lubricating oil composition, the Mannich ashless dispersant has a structure as shown in a formula I: # imgabs0 #, R1 is selected from H, hydroxyl, C1-C12 alkyl and aryl, and n is 2-6. The lubricating oil composition is prepared from the following components in percentage by weight: 3 to 7 percent of ashless dispersant, 0.05 to 0.3 percent of clearing agent, 0.7 to 1.5 percent of anti-wear agent, 1.5 to 4 percent of antioxidant, 0.01 to 0.1 percent of corrosion inhibitor, 0.2 to 0.6 percent of friction modifier, 0.001 to 0.003 percent of anti-foaming agent and the balance of base oil, wherein the total weight of the lubricating oil composition is 100 percent. The lubricating oil composition disclosed by the invention has excellent electrochemical performance, mechanical protection performance, synchronizer durability and friction characteristics, heat conduction performance and material compatibility.

The present invention discloses a control method for a steam cooking appliance, which belongs to the field of kitchen appliances. The steam cooking appliance includes a steam generator and a water pump for supplying water to the steam generator. The control method includes the following steps: the steam cooking appliance is provided with a flow calibration program, in which a flow calibration factor N is obtained according to a change in the flow of the water pump during the process of the steam generator reaching a preset temperature condition; when the steam cooking appliance is working normally, a preset working flow F1 of the water pump is determined according to the heating power of the steam generator, the preset working flow F1 is calibrated according to the preset flow calibration factor N, a calibration flow F2 is obtained, and the water pump is controlled to supply water to the steam generator at the calibration flow F2. According to the control method, as long as the water pump can work normally, even if the flow deviation is large, it can be used on the steam cooking appliance through calibration, which reduces the screening work of the water pump manufacturer and the whole machine assembly plant, and reduces the manpower and time costs.

The utility model discloses a stone grabber of an excavator. The stone grabber comprises a first grabhook, a second grabhook, an angle adjusting assembly and a rotating table, a base is arranged below the rotating table, a connecting support is fixedly connected to the upper portion of the rotating table, a trapezoidal frame is fixedly connected to the bottom of the base, and the first gripper and the second gripper are arranged at the corners of the bottom of the trapezoidal frame in a crossed mode. The angle adjusting assembly is arranged on the outer side of the first grabbing claw and used for adjusting the grabbing angle of the first grabbing claw, so that the first grabbing claw can be better attached to the edge of the stone. The utility model is mainly used in the technical field of building construction, and achieves the effects of enhancing the gripping force of the grippers and being more flexible and stable by adding the gripping teeth, arranging the more flexible grippers and reinforcing the design of the oil cylinder on the original basis.

The invention discloses a method, device and equipment for evaluating the pulse charging performance of a power battery system, and relates to the technical field of power batteries, and the method comprises the steps: constructing a corresponding cell pulse charging current optimization model based on the relation between the cell working voltage and the pulse charging current under different characteristic working conditions; solving the battery cell pulse charging current optimization model to obtain the maximum pulse charging current of the battery cell under different characteristic working conditions; based on the system limit charging current, the system peak current and the battery cell maximum pulse charging current, determining the system maximum pulse charging current of the power battery system under different characteristic working conditions, calculating the pulse charging power of the power battery system under different characteristic working conditions, and formulating and verifying the pulse charging power MAP. Through the above mode, the pulse charging power of the power battery system under different characteristic working conditions is accurately determined, the pulse charging capability of the power battery system is rapidly and accurately evaluated, and the pulse charging power MAP is formulated.

The mica heater comprises an outer mica tube, an inner mica tube, a fixing support, a wire winding mica sheet, a heating wire, a fuse, a temperature controller and an anion generator. A containing space is formed between the inner mica tube and the outer mica tube, the wire winding mica sheet is located in the containing space, one end of the heating wire is connected with a first power line through a first connecting sheet, and the other end of the heating wire is connected with one end of the fuse through a second connecting sheet. The other end of the fuse is connected with one end of the temperature controller through a third connecting piece, and the negative ion generator is connected with the ion emission electrode through a connecting wire. Through the double-layer structure of the outer mica tube and the inner mica tube, heat leakage can be effectively prevented, and the heating efficiency is improved; the temperature controller and the fuse can realize accurate temperature control and overload protection, so that safe and efficient work of the heater is ensured; the anion generator can release anions to neutralize static electricity of hair, so that the hair is soft and smooth.

The present invention discloses a lightweight piezoelectric hydraulic pump suitable for long-term operation, which includes a pump body, a connection groove is arranged in the pump body, the lower part of the connection groove is connected to the cavity, the pump body is connected to the fixing part through the connection groove, and the fixing part is provided with an oil inlet pipeline and an oil outlet pipeline; a ceramic tube is arranged in the cavity, and the lower end of the ceramic tube is connected to the electrode; the upper end of the ceramic tube is connected to the driving block, the upper end of the driving block is in contact with the fixing part, a working chamber is arranged between the upper end face of the driving block and the lower end face of the fixing part, a separation hole connected to the ceramic tube is opened on the driving block, and a one-way valve sheet is respectively installed on one side of the driving block adjacent to the fixing part and on the side of the fixing part deviating from the driving block. The present invention can solve the problem that the valveless driver in the prior art is difficult to work for a long time, and has a compact structure, light weight, large output performance, and high energy density.

The present invention provides a negative thick electrode and a preparation method and application thereof, wherein the negative thick electrode comprises a current collector and a negative active material layer disposed on the surface of the current collector, wherein the negative active material layer comprises a negative active material, a conductive agent, a dispersant and a combined binder, wherein the combined binder comprises a binder A and a binder B, wherein the binder A comprises a block copolymer, wherein the middle of the block copolymer is a polyacrylate segment, and both ends comprise a polyacrylic acid segment and a polyvinyl alcohol segment, wherein the binder B comprises an emulsion-type binder, and the negative electrode sheet of the present invention comprises both the binder A and the binder B, and the electrode sheet comprising the binder A alone is hard and brittle, and has excellent dynamic performance. The simultaneous use of the binder A and the binder B makes the negative electrode sheet have good flexibility, is conducive to processing, reduces the situation where the active material falls off from the sheet, and reduces the risk of short circuit of the electrochemical energy storage device.

The invention discloses environment-friendly agricultural deinsectization equipment based on environmental protection, and relates to the technical field of agricultural deinsectization. The environment-friendly agricultural deinsectization equipment based on environmental protection comprises a machine body, a storage box installed below the machine body and used for storing environment-friendly pesticide, a hose connected to the side wall of the storage box and used for conveying pesticide liquid, and a spray head fixed to one end of the hose and used for spraying the pesticide liquid. An adjusting assembly for changing the spraying angle of the liquid medicine, a distance adjusting assembly for changing the interval between the spraying head and the machine body and a concentrating assembly for changing the state of sprayed liquid drops are arranged below the storage box, and the adjusting assembly comprises a connecting shaft fixed to the spraying head and used for supporting the spraying head; the fixed seat is fixed on the connecting shaft and transmits acting force for changing the angle of the spray head, and a rotating shaft is fixed in the fixed seat; and the phenomenon of liquid medicine drifting caused by wind power is reduced, so that the pesticide applying precision is improved, the influence on a non-target area is reduced, and the risk of environmental pollution is reduced.

The utility model discloses a winching machine driven by a pure electric servo motor, which comprises a machine frame assembly, a gear reduction box and a supporting assembly are arranged above the machine frame assembly, a driving motor assembly for inputting power to the gear reduction box is connected with one side of the gear reduction box in a hanging mode, and the driving motor assembly is connected with the supporting assembly in a hanging mode. An output shaft on the other side of the gear reduction box is rotationally connected with the supporting assembly, and an execution roller assembly is arranged on the output shaft between the supporting assembly and the gear reduction box; the double-motor driving mode is adopted, speed change and reversing are operated and controlled more safely and rapidly, the overall structure is reasonable, and the layout is more compact.