8results about How to "Avoid shorting" patented technology

The application discloses a secondary battery and an electric device, comprising: a shell, an electrode assembly, a top cover sheet, an insulating piece and a protruding piece, the top cover sheet is connected with the shell, and the top cover sheet is provided with a liquid injection hole; the insulating piece is connected with one side of the top cover sheet facing the electrode assembly; the protruding piece comprises an extension part and a blocking part, the extension part is connected with one side of the insulating piece away from the top cover sheet; the blocking part is connected with one side of the extension part away from the insulating piece, and the orthogonal projection of the blocking part on the top cover sheet covers at least part of the liquid injection hole; at least one flow guide hole is arranged on the extension part, and the flow guide hole is communicated with the liquid injection hole; the sum of the areas of the at least one flow guide hole is S1 mm 2 , the area of the liquid injection hole is S2 mm 2 , and the following condition is met: 1≤S1 / S2≤4. After the secondary battery meets the range of 1≤S1 / S2≤4, the strength of the protruding piece is improved, and the electrolyte injection efficiency is further improved, so that the production yield of the secondary battery is significantly increased.

The application discloses a low-voltage shutdown and power grid activation system and equipment thereof, and relates to the technical field of battery protection, in particular to a low-voltage shutdown and power grid activation system and equipment thereof. The first voltage signal of a target battery is acquired through a battery sampling circuit; the controller performs voltage judgment on the first voltage signal, and when the first voltage signal is lower than a preset voltage threshold, a shutdown signal is delivered to the low-voltage shutdown circuit; then the low-voltage shutdown circuit performs shutdown processing on the auxiliary source of the transformer according to the shutdown signal of the controller; and the low-voltage protection circuit and the activation circuit perform start processing or clamping processing on the auxiliary source of the transformer according to the second voltage signal of the power grid. The application can realize low-voltage protection of the battery, prevent the continuous operation of the inverter from causing the battery to be empty, and based on the low-voltage protection of the battery, the inverter can be charged by the power grid when the power grid is powered, without artificially adding a power supply to the battery for charging, thereby saving the equipment maintenance cost, and can be widely applied to the technical field of battery protection.

The utility model provides a battery test fixture and a battery test frame, the battery test fixture comprises a bottom plate, a first support structure and a second support structure, the first support structure and the second support structure are both arranged on the bottom plate, the first support structure comprises a first support plate, and the second support structure comprises a second support plate. The first supporting plate and the second supporting plate are correspondingly arranged, the first supporting plate comprises a first supporting surface, the first supporting surface is used for supporting a first palladium sheet connected with a negative electrode of a to-be-tested battery, the second supporting plate comprises a second supporting surface, and the second supporting surface is used for supporting a second palladium sheet connected with a positive electrode of the to-be-tested battery. The test power lines and palladium sheets are stored through the supporting surfaces of the two supporting plates, so that disordered arrangement positions of the power lines and the to-be-tested battery are avoided, the operation table is arranged in order, and short circuit between the power lines and the power lines of different groups of tests is avoided.

This disclosure relates to a polishing composition that includes at least one abrasive; at least one nitride removal rate reducing agent, an acid or a base; and water. The at least one nitride removal rate reduce agent can include a hydrophobic portion containing a C4 to C40 hydrocarbon group; and a hydrophilic portion containing at least one group selected from the group consisting of a sulfinite group, a sulfate group, a sulfonate group, a carboxylate group, a phosphate group, and a phosphonate group; in which the hydrophobic portion and the hydrophilic portion are separated by zero to ten alkylene oxide groups. The polishing composition can have a pH of from about 2 to about 6.5.

The invention discloses a battery piece and a photovoltaic module. The battery piece comprises a substrate, and the surface of the substrate is provided with an N-type doped layer, a P-type doped layer and an isolation region arranged between the N-type doped layer and the P-type doped layer; the N-type doping layer and the P-type doping layer are arranged in an interdigital manner, each of the N-type doping layer and the P-type doping layer comprises a main body part and a finger-shaped part, the main body parts extend along a first direction, and the finger-shaped parts are arranged on at least one side of the main body parts along a second direction; the finger-shaped part is provided with a current collection electrode extending along a second direction; the first insulating layer is arranged at the position, close to the main body part of the opposite conductive type, of the finger-shaped part; the first insulating layer covers the end portion of the collector electrode, and the first insulating layer and the adjacent isolation region are arranged at an interval in the second direction. The first insulating layer is utilized to play an insulating and isolating role, meanwhile, the shielding area of the first insulating layer on the surface of the substrate is reduced, and the problem of poor local connection of the interconnector caused by the fact that the interconnector is heightened due to the fact that the first insulating layer partially extends below the interconnector can also be avoided.

The utility model discloses a kind of compressor refrigeration system quick oil return device and refrigeration system, including compressor, gas-liquid separation tank, still including oil temporary storage tank;The liquid outlet of gas-liquid separation tank is communicated with oil temporary storage tank by liquid outlet pipeline;Oil temporary storage tank is communicated with the suction port of compressor by oil return pipeline;Oil temporary storage tank and compressor outlet are communicated by power line;First control assembly is set on the power line, second control assembly is set on the liquid outlet pipeline.The utility model increases the process of temporary storage tank flow, power line by in compressor refrigeration system, realize the quick backflow of lubricating oil in pipeline, avoid screw compressor long-term low oil level operation, ensure that compressor normal operation.

The utility model discloses a heater, which comprises a shell, a confluence plate, a lead-out piece, a power supply plate and a plurality of heating units, the current input end of each heating unit is electrically connected to the first conductive part of the confluence plate; the current output end of each heating unit is electrically connected to the second conductive part of the confluence plate; the leading-out piece comprises an insulating piece, a first electric connecting piece and a second electric connecting piece; the insulating part wraps the first electric connecting part and the second electric connecting part; the two ends of the first electric connecting piece extend out of the insulating piece and are electrically connected with the first conductive part and the first pin of the power supply plate respectively; the two ends of the second electric connecting piece extend out of the insulating piece and are electrically connected with the second conductive part and the second pin of the power supply board respectively. According to the utility model, the first electric connecting piece and the second electric connecting piece which are used for electrically connecting the bus board and the power supply board are coated with the insulating pieces, so that short circuit between the first electric connecting piece and the second electric connecting piece and other parts can be effectively avoided, and the use safety of the heater is improved.

The application belongs to the technical field of display, and discloses a display module, a preparation method thereof and a display device. The display module comprises a micro display screen body, a flexible circuit board, a metal boss and an adhesive. The micro display screen body comprises a first substrate, and a display area is arranged on the first substrate. A plurality of parallel and spaced PADs are arranged on one side of the display area, and the PADs are recessed on the first substrate. The flexible circuit board comprises a second substrate, and a plurality of gold fingers are arranged on the second substrate. The plurality of gold fingers correspond to the plurality of PADs one by one. The metal boss is provided with a plurality of first ends, and the first ends are abutted to the PADs. The second ends of the metal boss protrude from the first substrate. The adhesive is used to connect the second ends of the metal boss and the gold fingers. The application also provides a preparation method of the display module, and the preparation efficiency of the metal boss is improved. The application also provides a display device, which comprises the above display module and has high use reliability.