31results about How to "Avoid desoldering" patented technology

The invention provides a portable stirrup welding device for high pier construction, and relates to the technical field of box girder stirrup welding equipment.The portable stirrup welding device comprises a welding hand-held piece, and a steel bar storage part is installed on the welding hand-held piece; the steel bar storage part is used for storing stirrup connecting bars; a connecting rib pushing piece is mounted on the welding handheld piece; the connecting rib pushing piece is used for pushing stirrup connecting ribs; two stirrup prestress pieces are mounted on the welding handheld piece; the two stirrup prestressed parts are used for pulling stirrups; prestress annealing welding can be achieved, the welding tension degree is poor, meanwhile, the accuracy of welding seams can be affected by deviation of the stirrups, and the problems that the welding efficiency is low, the stirrups are not convenient to automatically correct and the tension degree of the welded stirrups is poor due to the fact that welding work of the stirrups for high pier construction mostly adopts manual handheld welding gun operation are solved.

A tension roller set intelligently driven by a permanent magnet motor is used for providing tension for a metal plate strip in the metallurgical industry. The double permanent magnet motor sets are connected with the tension rollers through couplings, the first tension roller and the second tension roller are installed on the left side and the right side of the upper portion of the roller set rack and arranged in a high-low staggered mode in the vertical direction, and the third tension roller and the fourth tension roller are installed on the left side and the right side of the lower portion of the roller set rack and arranged in a high-low staggered mode in the height direction. One side of the mandrel is connected with the first hub through a flat key, the other side of the mandrel is connected with the second hub, the two ends of the first radial plate are welded to the first hub and the roller respectively, the first radial plate and the first hub are in reinforced connection through the first rib plate, the two ends of the second radial plate are welded to the second hub and the roller respectively, the second radial plate and the second hub are in reinforced connection through the second rib plate, the surface of the roller is coated with the glue layer, and the supporting plate is welded to the middle of the roller. The tension control device has the advantages of high response speed, high control precision, large rotating thrust, easiness in controlling the rotating speed and the like, and the tension of the tension roller can reach dozens of tons and even more than one hundred tons.

The invention relates to the technical field of battery pack steel belt welding machining, in particular to a welding machining method for a battery pack steel belt hoop. After a steel belt is bent into a U shape, a heat shrink tube is connected in a sleeved mode, then the side edge of the steel belt is bent inwards to form a bent edge, then the bent edge is bent by 90 degrees twice to serve as a groove for connecting a cuboid metal block, three faces of the metal block and a bent section are welded in a three-face mode, the structure is stable, the cuboid metal block is connected in a threaded mode through two screws, and then end welding is conducted. During assembly or disassembly, fastening connection and disassembly can be achieved by adjusting the tightness of the hoop, use is convenient, in the assembly state, when the steel belt hoop is subjected to outward acting force of a battery pack, due to the fact that three faces of the bent section of the steel belt wrap the cuboid metal block, and three faces of the bent section of the steel belt are welded, the steel belt hoop can be firmly connected and disassembled. The welding part is prevented from being unwelded due to shearing acting force, and the stability of the steel belt hoop is greatly improved.

The invention provides a two-in-one buzzing loudspeaker. The two-in-one buzzing loudspeaker comprises a shell, a loudspeaker assembly and a buzzer assembly, a first mounting cavity with an opening in the upper end is formed in the upper portion of the shell, a second mounting cavity with an opening in the lower end is formed in the lower portion of the shell, and the loudspeaker assembly and the buzzer assembly are installed in the first mounting cavity and the second mounting cavity respectively; a first sounding channel for communicating the first mounting cavity and the second mounting cavity is vertically arranged in the middle of the inner side of the shell, a second sounding channel is vertically arranged in the middle of the loudspeaker assembly, and sound waves generated by the buzzer assembly are emitted from the shell through the second sounding channel and the first sounding channel in sequence; according to the invention, the production cost of the two-in-one buzzing loudspeaker can be reduced, and the two-in-one buzzing loudspeaker can be reliably applied to a narrow installation environment.

The utility model relates to the technical field of semiconductor packaging structures, and discloses a semiconductor integrated device structure, which comprises a packaging ceramic and a wafer, an insulating heat-conducting plate is transversely embedded and fixed at the lower part in the packaging ceramic, a plurality of through holes are uniformly arranged on the surface of the insulating heat-conducting plate, pins are arranged in the through holes in a penetrating manner, and the pins are connected with the packaging ceramic. A copper plate is fixed to the outer ring above the packaging ceramic in a covering mode, the two sides of the copper plate are bent downwards, and the two sides of the insulating heat conduction plate are bent upwards and attached to the inner side surface of the copper plate in a contact mode. According to the technical scheme of the utility model, the insulating heat-conducting plate is embedded and fixed in the lower part of the packaging ceramic, the pins pass through the through holes of the insulating heat-conducting plate, and the insulating heat-conducting plate extends to the outside to be in contact with the copper plate above the chip, so that heat during welding is directly transmitted to the pins from the top, the heating of the wafer is reduced, the wafer is prevented from being burnt, and the reliability of the wafer is improved. And meanwhile, when the chip works, heat at the pins is directly transferred to the copper plate for heat dissipation, so that sealing-off caused by over-high heat at the pins is avoided.

The application relates to a welding jig which comprises a base assembly provided with a position-giving part, an upper pressing assembly provided with a pressing correction part and a locking mechanism, when the upper pressing assembly and the base assembly are locked, the pressing correction part forces the local part of a to-be-welded plate into the position-giving part, so that the plate generates a preset elastic deformation. The welding jig effectively overcomes the problem that the plate cannot be closely attached due to its own warping by forced deformation through the above structure, ensures the close contact of the plate, components and frames at the welding position, eliminates the welding gap, effectively avoids the virtual welding and false welding phenomenon, and significantly improves the welding quality and connection strength of the electronic assembly.

The utility model discloses a roll paper frame which comprises a roll paper cover, a fixing plate, a hanging plate and a paper tube hanging rod. Meanwhile, the roll paper cover is formed by combining two metal plates, namely an upper plate body and a lower plate body, a fixing plate is fixedly mounted on the lower plate body, and the paper tube hanging rod is connected with the fixing plate through a screw; meanwhile, the lug plate of the hanging plate is inserted into the inner cavity formed between the upper plate body and the lower plate body, and the lug plate is connected with the fixing plate, so that the hanging plate and the roll paper cover are connected into a whole, and the problem that when the hanging plate and the roll paper cover are connected in a welded mode, the hanging plate and the roll paper cover are easily subjected to unsoldering due to rusting is solved; and the requirement of stably mounting the tissue holder is met.

The application belongs to the technical field of battery welding, and discloses a welding device and a welding method for back contact batteries. The welding device for back contact batteries comprises a welding main body, a welding strip conveying unit, a battery piece transplanting unit and a welding unit. The welding main body is provided with a welding heat transfer carrier and a welding strip fixing member. The welding strip conveying unit sends a plurality of parallel welding strips with bus bars at both ends to the welding heat transfer carrier. The welding strip fixing member fixes the bus bars to prevent the welding strips from being straight. The battery piece transplanting unit can grab a plurality of battery pieces and press the back surfaces of the battery pieces to the welding strips on the welding heat transfer carrier. The plurality of battery pieces are arranged in parallel and at intervals along the extension direction of the welding strips. The welding unit is located below the welding heat transfer carrier. The welding unit can move back and forth in the vertical direction to weld the plurality of battery pieces and the plurality of parallel welding strips. The damage and scratches of the welding strips in the accommodating groove can be avoided. The welding rate and the heat dissipation rate of the welding strips are consistent, and false welding or welding separation is avoided.

The present invention relates to the technical field of battery pack steel strip welding processing, and in particular to a battery pack steel strip clamp welding processing method; after the steel strip is bent into a U shape, a heat shrink tube is first sleeved, and then the side of the steel strip is bent inward to form a bent edge, and then the bent edge is bent twice by 90 degrees to serve as a groove for connecting a rectangular metal block, and three sides of the metal block are welded to the bent section on three sides, so that the structure is stable, and the rectangular metal block is threadedly connected with two screws and then the ends are welded to form a double-headed screw. During assembly or disassembly, the tightness of the clamp can be adjusted to achieve fastening and disassembly, and it is easy to use. In the assembled state, when the steel strip clamp is subjected to the outward force of the battery pack, the bent section of the steel strip wraps the rectangular metal block on three sides and is welded on three sides, so that the welding part is prevented from being desoldered due to the shear force, and the stability of the steel strip clamp is greatly improved.

This invention provides a chip flip-chip packaging method. A first solder is applied to the solder windows of a chip formed on a wafer, fixing the first end of a solder post to the solder window. A curing agent is filled between the solder posts. The solder posts are then ground so that their second ends are on the same plane, and a solderable layer is formed on the end face of the solder posts before the curing agent is removed. The second end of the solder post is fixed to a frame or substrate coated with a second solder, forming a potting gap between the second end of the solder post and the chip. Epoxy resin is then filled into the potting gap and encapsulates the chip. The melting point of the first solder is higher than that of the second solder. This invention uses solder posts on the chip solder window to create a potting gap between the chip and the frame or substrate. During a single epoxy resin filling, the epoxy resin flows directly into the potting gap and encapsulates the chip. Compared to processes requiring bottom filling with adhesive, this reduces the number of filling operations, lowers internal stress caused by varying degrees of curing of the adhesive with different filling operations, thereby simplifying production steps and improving production efficiency.

The utility model discloses a device for cooling a liquid crystal substrate glass platinum channel heating flange, which relates to the technical field of liquid crystal substrate glass and comprises a cooling water pipe, a reinforcing rib, a flange plate, a water inlet and a water return port. The cooling water pipe comprises a cooling coil pipe and cooling straight pipes, the cooling coil pipe is arranged on the outer edge and the surface of the flange plate, the two ends of the cooling coil pipe are connected with the different cooling straight pipes respectively, the different cooling straight pipes are communicated through the cooling coil pipe, one cooling straight pipe is connected with a water inlet, and the other cooling straight pipe is connected with a water return port. Reinforcing ribs are arranged on the contact faces of the cooling water pipes and the flange plates. The flange cooling device can solve the problems that an existing flange cooling device is small in acting area and low in heat exchange efficiency.

The application discloses a welding device for photovoltaic panel processing and relates to the technical field of photovoltaic panel welding.The device comprises an equipment mainframe, a mounting plate fixedly arranged on the equipment mainframe and a welding assembly arranged on the mounting plate; further comprises conveying mechanism one and conveying mechanism two, and the photovoltaic panel is placed on the conveying mechanism one.The device has the advantages that the amount of flux can be automatically adjusted according to the width of the welding rod, and the problems of residue, virtual welding and welding separation can be avoided; meanwhile, the device is provided with an automatic wiping structure, the surface impurities of the welding rod can be removed according to different specifications of the welding rod, the welding joint strength is improved, the double conveying, steering and clamping mechanisms are matched, the precise conveying, positioning and clamping of the photovoltaic panel are realized, the device is suitable for products of different specifications, the defective rate is reduced, the problems of poor adaptability of the traditional equipment, improper flux supply and insufficient cleaning of the welding rod are effectively solved, and the welding quality and production efficiency are greatly improved.

The invention discloses an ink box which comprises a shell, the outer side of the shell is provided with a leading-out part and an air inlet, the leading-out part is provided with a first surrounding wall, the first surrounding wall is arranged on the first direction side of the shell in a protruding mode, the air inlet is provided with a second surrounding wall, and the second surrounding wall is arranged on the outer side of the shell in a protruding mode; the sealing film comprises a shaping section, and the shaping section is located between the leading-out part and the air inlet; the reference line is a line segment connecting the near ends of the first enclosure wall and the second enclosure wall in the second direction, the length of the shaping segment is larger than that of the reference line, and at least part of the shaping segment is located on the side, close to the shell, of the reference line. The leading-out part and the air inlet are sealed through the sealing film, the sealing film forms the shaping section which is bent towards one side of the shell and is relatively fixed in shape between the leading-out part and the air inlet, when the ink box sleeve bag is vacuumized, the packaging bag is not prone to making contact with the shaping section after collapsing and deforming, the corresponding acting force is relatively small even if contact occurs, and therefore the ink box sleeve bag can be vacuumized. Therefore, sealing-off of the sealing film, the leading-out part and the welding part of the air inlet is effectively avoided.

The utility model relates to multilayer ceramic capacitor technical field, concretely to a new multilayer ceramic capacitor with protection structure, include: support, the both ends tin soldering of support have capacitor body, the downside of support is equipped with two groups of support structure, the support structure includes first connecting piece, two groups first connecting piece are connected in the both ends of support bottom surface through tin soldering, the surface of first connecting piece integrative buffering piece has, the bottom of buffering piece integrative second connecting piece forms. The buffering piece of utility model setting is inclined and presents the zigzag shape structure, can reduce buffering piece's rigidity in vertical and left and right direction, improve the deformation sensitivity of support structure, and the bottom of two groups buffering piece is located left and right sides of support respectively, can increase the floor area of device, and then guarantee that device can stably place on the substrate, be convenient for translation activity and will not tip over, improve the convenience of welding.

The invention discloses a circuit board semiconductor welding positioning device, which relates to the field of electrical appliance welding and solves the fixing problem of special-shaped circuit boards and the problem of double-sided soldering. The circuit board semiconductor welding positioning device includes a fixed top plate, a mainframe bottom plate and a hollow support rod, and also includes a special-shaped circuit board fixing mechanism and a second welding electric soldering iron. The special-shaped circuit board fixing mechanism also includes: a special-shaped work table, a lateral fixing component, a reinforcement component and a reverse soldering component. The reverse soldering component is installed at the bottom of the lateral fixing component. The reverse soldering component can simultaneously solder the reverse side of the circuit board. The reverse soldering component includes a first welding electric soldering iron. The fixing effect of the semiconductor object to be soldered is strengthened by the special-shaped circuit board fixing mechanism, and the semiconductor object to be soldered can be moved. The fixing effect and fixing effect of the fixing mechanism are better than those of a suction cup, and the special-shaped work table can withstand greater impact force.

The utility model discloses a high-voltage color LED lamp panel, and relates to the technical field of LED lamp panels. The LED lamp panel comprises an LED lamp panel main body, a plurality of lamp beads are installed on the front face of the LED lamp panel body, a plurality of linearly-arranged wires are welded to the wiring position of the back face of the LED lamp panel body, and a wire pressing device is fixedly connected to the back face of the LED lamp panel body. The line pressing device comprises a lower base fixedly connected to the back face of the LED lamp panel body and a pressing base installed at the top of the lower base, placement grooves are formed in the two ends of the lower base, shifting plates are fixedly connected to the bottoms of inner cavities of the two placement grooves, protruding blocks are fixedly connected to the opposite faces of the two shifting plates, and clamping hooks are fixedly connected to the positions, close to the two ends, of the bottom of the pressing base. The two ends of the lower base are rotationally connected with check blocks, and the inner sides of the check blocks are attached to the outer sides of the shifting plates. According to the utility model, the lower seat and the pressing seat are combined to fix the lead, so that the lead is effectively prevented from moving repeatedly to cause unsoldering, and the stable operation of an LED lamp panel is ensured.

The invention relates to the field of tactile feedback devices, and discloses a Z-direction broadband vibration device which comprises a vibrator part and a stator part, the vibrator part is composed of a parallel elastic piece, a convex-concave metal plate, a mass block, a permanent magnet and an upper metal plate, and the stator part is composed of a lower shell, an iron core, a coil and an F-PCB; the flat elastic sheet adopts a rectangular annular structure, so that the welding area is increased, the process is simplified, and the connection strength and reliability are improved; bulges are arranged at four corners of the convex-concave metal plate, so that the mass block is prevented from being in direct contact with the elastic sheet during falling, and the elastic sheet is prevented from deforming The integrated design of the iron core and the metal plate simplifies the assembly process, improves the impact resistance and the vibration performance, reduces the manufacturing cost, and prolongs the service life of the product. By optimizing the structural design and simplifying the production process, the stability, impact resistance and production efficiency of the vibration device are improved, the manufacturing cost is reduced, and the service life of the product is prolonged.

The utility model relates to the field of power batteries, and discloses a busbar with a battery cell expansion self-adjusting function and a battery cell module thereof, the busbar comprises a busbar body, two ends of the busbar body are symmetrically provided with a first mounting part and a second mounting part which are matched with battery cell poles, at least one group of expansion absorption units are arranged between the first mounting part and the second mounting part, each group of expansion absorption units comprises two symmetrically distributed bosses, the cross section of each boss is arched, the two bosses form a splayed structure, and the upper surface and the lower surface of each boss respectively comprise a plurality of arc surfaces. In practical application, the problem that the existing busbar structure cannot avoid the sealing-off of the busbar and the battery cell due to the expansion of the battery cell is solved.

The utility model discloses an optical fiber on-line monitoring alarm device, which relates to the technical field of optical fiber on-line monitoring, and comprises a mounting plate and a network disconnection alarm host body arranged on the front surface of the mounting plate, the front surface of the mounting plate is provided with a mounting hole, the rear surface of the network disconnection alarm host body is fixedly connected with an insertion block, and the insertion block is provided with an insertion hole. A plurality of positioning holes are formed in the outer circle face of the inserting block, and locking mechanisms are arranged on the upper surface and the interior of the mounting plate. Compared with an existing common optical fiber on-line monitoring and warning device, the optical fiber on-line monitoring and warning device has the advantages that when the optical fiber on-line monitoring and warning device is installed, the insertion block is inserted into the installation hole, the magnetic attraction block can attract the iron sheet to perform forward auxiliary positioning and installation, the installation structure is in the vertical direction, and if a proper rotation angle needs to be adjusted and the network disconnection warning host body needs to be rotated, the installation is convenient. By means of the design, the network disconnection alarm host body can be disassembled, assembled and maintained conveniently, and meanwhile the network disconnection alarm host body can be rotationally installed and fixed according to the designed installation position.

The utility model belongs to the technical field of building foundation structures, and particularly relates to a laminated steel mesh strip-shaped foundation structure suitable for an assembly type rural house strip-shaped foundation. Comprising a necessary bearing platform, a foundation wall, embedded ribs and optional foundation beams. The bearing platform is composed of a first steel wire net frame and in-cavity concrete. The first steel wire net frame comprises a steel wire net, inserting wires, an edge sealing net film and reinforcing ribs. The foundation wall is composed of a second steel wire net frame, a heat preservation plate and in-cavity concrete. The second steel wire net frame comprises a main reinforcement net, a disassembly-free net film, a second inserting wire and a positioning clamping piece. The embedded ribs are longitudinally arranged in the foundation wall, and the upper ends of the embedded ribs are exposed. The problems that an existing foundation is tedious in construction, long in period, high in thermal bridge effect and poor in structural integrity are solved, formwork-free rapid construction is achieved through the prefabricated steel wire net frame, the thermal bridge effect is reduced through the heat preservation plates, the structural strength and durability are improved through cooperation of multiple components, the foundation beams can be selectively arranged according to the foundation conditions, and the construction efficiency is improved. And the method has remarkable practicability and economical efficiency.

This utility model discloses a high-speed wire welding fixture, relating to the field of wire processing tool technology. It includes a fixture base, at least one wire clamping cover, a rotating shaft, a latching member with at least one latching block on its surface, and at least one elastic member. The at least one wire clamping cover is rotatably mounted on at least one side of the fixture base via the rotating shaft. At least one PCB cavity is formed at a location on the fixture base along the rotation direction of the at least one wire clamping cover. The at least one elastic member movably mounts the at least one latching member onto the side of the at least one PCB cavity of the fixture base. The rotating shaft drives the wire clamping cover to rotate in a set direction and close it onto the wire surface for clamping and fixing. Simultaneously, a location on the wire clamping cover forms an adaptive fastening connection with the latching member via the latching block. When pressed by the latching block, the latching member can displace in the left-right direction and automatically reset under the elastic force of the elastic member, thereby achieving stable locking of the wire clamping cover and faster opening, resulting in higher operational efficiency.

The utility model provides a terminal housing structure of an electric energy meter, the electric energy meter comprises a hollow body and a circuit board arranged in the body, a terminal housing is arranged in the body and below the circuit board, the terminal housing comprises a plurality of accommodating grooves for accommodating current terminals, and the accommodating grooves are communicated with the circuit board. A wire is connected between the current terminal and the circuit board, a positioning fixture block used for positioning the wire is fixed at the position of the terminal shell, the positioning fixture block abuts against the lower end face of the circuit board, and the terminal shell structure can overcome the defects that in the prior art, a manual welding mode is tedious, and desoldering is prone to being caused.

The utility model relates to the technical field of plastic stone rockery construction, in particular to a rockery reinforcing mesh support, and aims to solve the problem that the construction quality is low due to the fact that existing plastic stone rockery construction depends on manual bending of reinforcing steel bars on site, the rockery reinforcing mesh support comprises a supporting assembly used for supporting the weight of the whole structure, and the supporting assembly comprises a bearing beam and a supporting framework; the bearing beam is installed on the ground, and the supporting framework is installed on the bearing beam. A reinforcing mesh is arranged on the supporting assembly, the reinforcing mesh comprises a plurality of sub-meshes, and the sub-meshes are installed on the supporting framework; the supporting framework is provided with a connecting assembly, the connecting assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is used for connecting the sub-net pieces and the supporting framework, and the second connecting piece is used for connecting the adjacent sub-net pieces. The construction method has the effect of improving the construction quality of the plastic stone rockery.

The utility model relates to the technical field of laser welding, in particular to a laser welding device which comprises a laser system and a clamp, the laser system comprises a laser, an optical fiber, a focusing assembly and a positioning assembly, the laser is used for emitting a light beam, and the light beam sequentially passes through the optical fiber, the focusing assembly and the positioning assembly and then irradiates a to-be-welded part; the positioning assembly is used for adjusting the focusing position of the light beam on the to-be-welded part, and energy of the light beam is distributed in a flat-top mode. According to the technical scheme, the laser welding device can be adopted for welding the to-be-welded part, stable welding can be conducted on the premise that whether the to-be-welded part is pretreated or not, irradiation is conducted through high-energy-density light beams distributed on the flat top, an insulating layer on the surface of the to-be-welded part can be instantly gasified, fusion welding is conducted on the to-be-welded part, and the welding quality is improved. And pseudo soldering and unsoldering are effectively avoided, falling and aging caused by long-term use are prevented, the welding yield and the use reliability are improved, and meanwhile resistance increase can be avoided through the laser fusion welding mode.

The utility model provides a wiring terminal connected with an enameled wire. The wiring terminal comprises a terminal body; the clamping groove is formed in the upper part of the terminal body, and an enameled wire passes through the interior of the clamping groove; the welding block is arranged on one side of the terminal body and used for being welded with the enameled wire, and the wiring terminal can overcome the defect that in the prior art, when the enameled wire is moved, the enameled wire and the wiring terminal are prone to being unsoldered, and consequently a motor is powered off.

The present invention relates to the technical field of lithium battery protection plates, and discloses an impact-resistant high-strength lithium battery protection plate, including a plate cover, both ends of the inner wall of the plate cover are fixed with mounting plates, a protection plate is placed on the mounting plate, a plurality of cables are connected to the bottom of the protection plate, both lower ends of the plate cover are threaded with screws, the ends of the screws are sleeved with clamps through a rotating assembly, both sides of the inner wall of the clamps and the rod wall of the screws are provided with buffer protection components, the buffer protection components include two symmetrically arranged rubber pads, both sides of the inner wall of the clamps are provided with placement grooves, and one end of the rubber pad is slidably embedded in the placement groove. The impact-resistant high-strength lithium battery protection plate can be wrapped around the outside of the lithium battery, effectively dissipate the impact received from the outside, protect the lithium battery, and at the same time fix the cable connection part to try to avoid desoldering at the connection with the protection plate.

The utility model is suitable for the technical field of welding, and provides an ink box external chip welding device which comprises a welding machine, a welding head arranged on the welding machine, an adjusting assembly arranged on the welding machine, a pressing block arranged on the adjusting assembly, an ink box placed on the welding machine, and an external chip placed on the ink box. The external chip is placed on the ink box, the welding machine is started, the welding machine drives a welding head to be pressed downwards to the external chip, the external chip and the ink box are pressed tightly, heat conduction is conducted at the same time, tin on a contact is melted after being heated, meanwhile, the contact is connected with an FPC contact, the contact of the external chip is connected with the FPC contact of the ink box, and the welding head leaves; and meanwhile, the adjusting assembly acts to drive the pressing block to press the external chip and the ink box again, after the tin soldering point is completely cooled and solidified, the adjusting assembly drives the pressing block to reset, the ink box is taken out, and the welding procedure of this round is finished. And pseudo soldering and unsoldering are effectively prevented.

The utility model relates to the technical field of batteries, in particular to a battery tray, a battery pack and electric equipment. The battery tray comprises a bottom plate and at least two expansion beams extending in the first direction, the at least two expansion beams are arranged on the bottom plate in the second direction at intervals, and the first direction is perpendicular to the second direction. Wherein one expansion beam at least comprises a first expansion part and a second expansion part, a first mounting area is formed between the first expansion part and the other expansion beam, and a second mounting area is formed between the second expansion part and the other expansion beam. The widths of the first expansion part and the second expansion part in the second direction are unequal, so that the lengths of the first mounting area and the second mounting area in the second direction are unequal. The battery pack and the electric equipment comprise the battery tray, and the same expansion beam of the battery tray is used for limiting the battery cell groups with different lengths respectively, so that the universality of the battery tray is improved. The expansion beams can resist expansion deformation of the battery cells, so that short circuit of the battery pack caused by sealing-off of a connecting aluminum row of the battery cells is avoided.

This utility model discloses a center conductor assembly molding mold, including an upper mold, a lower mold, upper mold core one, upper mold core two, upper mold core three and an upper mold adjustment block installed in the upper mold, and lower mold core one, lower mold core two, lower mold core three and a lower mold adjustment block installed in the lower mold. During mold closing, pressure is applied from the upper mold to the lower mold, with the upper and lower mold cores corresponding to each other. The mold structure of this utility model can adjust the pin height of the center conductor assembly and increase the forming angle, causing plastic deformation of the pin forming area under pressure. This reduces the springback at the bending point of the center conductor and the stress release during the manufacturing process. Simultaneously, by adjusting the pin forming height, the three pins maintain a consistent end face height after slight springback, preventing desoldering and cold solder joints during the mounting / use of the center conductor assembly.