35results about How to "Solve the problem of poor welding" patented technology

The invention relates to a metal base plate used for welding a power module, which comprises a plate body, wherein more then four spacing protrusions for spacing the outer periphery of a welding flux layer are arranged on the front face of the plate body, a groove is arranged on the bottom of the plate body, and the groove is filled with a heat conducting silicon grease. In the invention, the metal base plate is improved, so that the metal base plate has reasonable structure, the welding flux layer can be conveniently positioned, the welding reliability is increased, so that the metal base plate has the characteristic of good heat conductivity and can maintain the consistent heat conductivity of the power module and prolong the service life of the power module.

The invention provides a welding fixture and a welding method. The welding fixture is used for welding a first circuit board and a second circuit board which are oppositely mounted. The first circuit board is provided with welding holes; the second circuit board, near one side of the circuit board, is provide with welding points corresponding to the welding holes, and the welding points are provided with soldering tins; the welding fixture comprises an soldering iron and a heating device. The soldering iron is used for dipping the first soldering tin to the welding holes; the heating device is installed on one side of the first circuit board which is far from and corresponding to the second circuit board.

The invention provides a flexible circuit board assembly and an assembling method thereof. The flexible circuit board assembly comprises a first flexible circuit board, an adhesion piece and a second flexible circuit board. The first flexible circuit board is provided with a first surface, a second surface and a through hole for communicating the first surface with the second surface. The adhesion piece is arranged on the second surface and covers the through hole. The second flexible circuit board is arranged on the first surface. Part of the second flexible circuit board is glued with the adhesion piece through the through hole. Due to the adoption of the flexible circuit board assembly, the adhesion piece glued on the second surface of the first flexible circuit board is utilized to be simultaneously glued with the second flexible circuit board on the first surface of the first flexible circuit board. An area of the first flexible circuit board, which is overlapped relative to second flexible circuit board, is partially excavated to form the through hole, so that the second flexible circuit board on the first surface can be mutually glued with the adhesion piece on the second surface through the through hole. Therefore, the aim of mutual location of the first soft flexible circuit board and the second soft flexible circuit board is achieved.

The invention provides a battery module. The battery module comprises a wire harness isolation plate integration module which is integrally and horizontally arranged above a plurality of battery cells of the battery module. According to the wire harness isolation plate integration module, the conducting strip group and the isolation plate are integrated into an integral structure, and the two side edge parts of each isolation unit are respectively provided with at least one elastic part, so that in specific application practice, if a battery cell expands, the elastic parts of the two side edge parts of the isolation unit generate elastic deformation, therefore, the pulling force generated by the expansion of the battery cell is absorbed, and the separation plate is prevented from being broken; in addition, the problem of poor welding between the low-height battery cell pole and the conducting strip caused by inconsistent heights of the battery cells can be well solved.

The invention discloses a machining method of an assembled welding part. The machining method is characterized by specifically comprising the following steps that S1, pipe cutting is conducted, specifically, a technician machines materials into a first 45-degree oblique angle pipe, a second 45-degree oblique angle pipe and a third right-angle pipe through a laser cutting machine; s2, pipe machining is conducted, specifically, an inverted trapezoidal groove is cut in the middle of the bevel edge of the first pipe through a laser cutting machine, a first rectangular groove is cut in the same side of the groove, an inverted trapezoidal protrusion is cut in the middle of the bevel edge of the second pipe, a second rectangular groove is cut in the same side of the protrusion, and rectangular protrusions are arranged on the two perpendicular sides of a third right-angle pipe correspondingly; the inverted trapezoidal groove and the inverted trapezoidal protrusion can be embedded, the first rectangular groove and the second rectangular groove can be embedded with the rectangular protrusion respectively, and the problems of poor welding and unattractive welding are solved through assembling, welding and the like.

The invention discloses an assembly type circular steel pipe column joint connecting device and an assembly method. The assembly type circular steel pipe column joint connecting device comprises a steel pipe column, connecting pieces and steel beams, a plurality of steel beams are arranged on the outer side of the steel pipe column in an annular array mode, the steel beams and the steel pipe column are connected through the connecting pieces, and a plurality of outer ribs are arranged on the lower portion of the steel pipe column in the annular array mode; the connecting pieces are correspondingly installed at the tops of the outer ribs, each connecting piece comprises a steel body, a plurality of clamping grooves are formed in each steel body in the annular array mode, and steel plates are connected into the clamping grooves and connected with the steel beams. According to the assembly type circular steel pipe column joint connecting device and the assembly method, the problem that welding between an existing circular steel pipe column and a profile steel beam is poor can be solved, and the space occupancy rate is small; the rigidity and the bearing capacity of a joint are improved to a great extent by overlapping and sleeving the connecting pieces such as annular thin steel plates, and meanwhile, the joint also has better integrity and stability; the assembly type circular steel pipe column joint connecting device has more mobility in a bolt penetrating hole fixing mode, connection between materials is reinforced, and the assembly type circular steel pipe column joint connecting device further has the advantages of being convenient to mount and dismount, large in application range and the like.

The application discloses a lithium ion battery with a positive electrode and a negative electrode arranged at the same side and a manufacturing method thereof. The lithium ion battery comprises a shell with an opening structure at an upper end, a naked cell held in the shell and provided with lugs at the left side and the right side, and a shell cover arranged at the upper opening of the shell and provided with poles at the left side and the right side; one end of the pole extends into the shell, and a lug connecting seam corresponding to the lug is formed on the pole extending into the shell; the lug extends into the lug connecting seam on the pole, and the lug is connected with the pole through the friction-stir welding process; the shell cover and the shell are connected together through the friction-stir welding process. By using the lithium ion battery disclosed by the application, the battery production efficiency and yield are improved, the battery capacity and the energy density are improved, the welding quality and the battery rate discharge performance are promoted, and the equipment input cost in the battery production process is lowered.

The invention discloses a PCB device welding method and device, and the method comprises the steps of pre-determining an area easy to be heated and deformed, of a PCB before the layout design of the devices on the PCB; designing the layout positions of the devices in other areas except the area easy to be heated and deformed, of the PCB; and welding the devices through a pre-designed screen plateaccording to the designed layout positions of the devices. According to the present invention, firstly, by determining the area easy to be heated and deformed of the PCB before layout, keeping away the layout position of the devices from the area with the maximum deformation, and then welding after the reasonable layout is completed, so that the problem of poor device welding is effectively solved, and the maintenance cost, manpower cost and the like caused by the poor welding are effectively saved. the PCBA device welding method and device is suitable for all PCBA board cards with large device chips, a large number of cost resources can be saved, the yield of the good products is effectively enhanced, and therefore the productivity benefits and economic benefits are increased.

The application discloses a connecting structure of a lug and a pole, and a connecting method. The connecting structure comprises the lug and the pole, a lug connecting hole corresponding to the lug is formed on the pole; the lug extends into the pole connecting hole in the pole, and the lug is connected with the pole through a friction-stirring welding process. The connecting structure disclosed by the application improves the connecting quality and efficiency of the lug and the pole.

The invention provides a solar cell double-glass assembly and an assembling method thereof. The solar cell double-glass assembly comprises front plate glass and back plate glass. A solar cell is packaged between the front plate glass and the back plate glass, and the solar cell is located on the back plate glass. The back plate glass is provided with a conductive bus bar connected with the solar cell, and the conductive bus bar passes through the back plate glass and is connected with a junction box. A wiring terminal connected with the conductive bus bar is arranged in the junction box, and the wiring terminal and the conductive bus bar are connected in a curable conductive fluid filling mode. According to the solar cell double-glass assembly and the assembling method thereof, the problems that the service life of the solar cell double-glass assembly is shortened even a fire disaster is caused and the efficiency of the solar cell is reduced due to overlarge series resistance in an existing bus bar connecting mode can be solved.

The invention discloses a device and a method for detecting welding of automobile accessories. The device comprises a welding structure, a jig structure, a jacking structure, a fixing frame, fixing blocks and a cooling structure; the jig structure is arranged at the lower end position of the welding structure; the jacking structure is arranged at the lower end position of the jig structure; the fixing frame is arranged on the outer side position of the jacking structure; the fixing blocks are arranged on the inner side position of the fixing frame, one ends of the fixing blocks are fixed to the fixing frame, and the other ends of the fixing blocks are fixed to the jacking structure; and the cooling structure is arranged at the lower end of the jig structure and the inner position of the jacking structure. According to the device and the method, a temperature sensor is arranged between the welding structure and the jig structure, a pressure sensor and the temperature sensor are arrangedon cooling tongs, so that the situation that product welding is poor or the welding position is shifted due to the fact that the welding temperature is too high and the pressure of the cooling tongsis too large in the welding combination technology process is effectively avoided.

The invention provides a method for enhancing the welding effect of a QFN (Quad Flat No-lead) package and a QFN package. An inward structure layer is formed at the bottom of the QFN package, and the very bottom is slightly smaller than the normal package size. A height difference is formed between the bottom structure layer and the sub-bottom layer in order to form a tin climbing channel. During welding, the bottom structure layer is welded with tin, and tin can climb to the sub-bottom and the side of the sub-bottom in order to increase the welding area and tin content and enhance the qualityof parts welding of the QFN package. The problem of poor welding due to the fact that the pins of QFN package parts are all at the bottom is solved. The welding quality and reliability of QFN packageparts are ensured. Therefore, the stability and safety of products are ensured.