39results about How to "Guaranteed overcurrent capability" patented technology

The invention discloses a circular lithium battery and a production method thereof. The lithium battery comprises a shell, a battery cell, a positive electrode battery cover plate assembly and a negative electrode battery cover plate assembly. A positive electrode foil and a negative electrode foil are separated by a diaphragm and then wound into a cylindrical battery cell. A positive electrode isa multi-tab structure, and a negative electrode is a full-tab structure. A sealing body is fixed on the anode battery cover plate in surrounding manner, and a safety valve is arranged in the middle.The negative electrode battery cover plate assembly comprises a current collector, a negative electrode battery cover plate and a current collector bracket; and the current collector body is fixedly connected to the upper part of the current collector bracket and is electrically connected with the negative electrode battery cover plate through a current collector connecting part. According to theinvention, an over-current capability of the battery is ensured, liquid injection and formation of the battery are facilitated, and installation is convenient and reliable.

The invention belongs to the technical field of battery manufacturing, and particularly relates to a battery top cover assembly structure. The battery top cover assembly structure comprises a first pole, a second pole and a top cover sheet, the first pole is provided with a first welding ring, the second pole is provided with a second welding ring, the top portion of the first pole is encapsulatedwith a first plastic piece matched with the first welding ring, the top portion of the second pole is encapsulated with a second plastic piece matched with the second welding ring, the first pole andthe second pole pass through the seal ring and are installed at the top cover sheet. By arranging an encapsulating structure of the top cover aluminum ring and the poles, the problem of generation ofa metal wire is solved, the safety of the battery is improved, the overcurrent capacity of the poles is ensured, and the production process is simplified, so that the production cost is reduced. Besides, the invention further discloses a battery top cover assembly method.

The invention provides a bidirectional transient voltage suppressing diode and a manufacturing method thereof. A second active region and a third active region, which are simultaneously formed and are of the same conductivity type, doped concentration and shape, are arranged in the diode. The longitudinal NPN or PNP structure of a traditional bidirectional transient voltage suppressing diode is changed into a transverse NPN or PNP structure. Via a current channel formed by a conducting layer, a buried layer and a first active region, symmetrical forward and backward suppressing voltage is ensured no matter whether forward voltage or backward voltage is applied to the diode. The whole diode is of a longitudinal structure, and the current carrying capacity of the diode is ensured without influencing encapsulation.

The invention discloses an electric core connecting sheet, a battery and an assembling method. The electric core connecting sheet comprises a body, an electric core connecting portion and a solderingconnecting portion. The electric core connecting portion is disposed on one side of the body and electrically connected with the tab of the electric core. The soldering connecting portion is disposedon the other side of the body, electrically connected to the pole of the battery, and bendable relative to the body. By providing the electric core connecting portion on the electric core connecting sheet, the tabs of the electric core can be soldered and fixed to the electric core connection portion, thereby realizing the early current collection of the positive and negative electrodes of the electric core, preventing the positive and negative of all the electric cores from being directly welded on the poles of the battery, and at the same time, ensuring the overcurrent capability of each connection position during the current collecting process of the battery. In addition, the welding connection portion on the electric core connecting sheet is connected with the pole of the battery, thereby finally realizing the current collection of the positive and negative electrodes of the plurality of electric cores, avoiding the welding difficulty caused by the excessive number of the tabs welded on the pole and improving the welding quality.

The invention relates to the field of rainwater treatment, and discloses a rainwater inlet device, which comprises a box body, a flow guide groove, a rainwater strainer, an overflow baffle plate, a filter medium layer and a rainwater pipeline, wherein the rainwater strainer is arranged at the top of the box body; the flow guide groove is arranged in the box body and is located below the rainwaterstrainer; the overflow baffle plate is perpendicularly arranged below the flow guide groove; the overflow baffle plate divides the box body into a rainwater storage and filter area and a water drain area; the filter medium layer is paved at the bottom of the rainwater storage and filter area; the tail end of the flow guide groove is located above the rainwater storage and filter area; the lower part of the overflow baffle plate is provided with a water penetration hole which is used for communicating the rainwater storage and filter area with the water drain area; the water drain area is provided with the rainwater pipeline. The rainwater inlet device provided by the invention can be used for effectively controlling the pollution by moderate and light rainfall and primary radial flow, andis provided with a primary rainwater storage space; a filter filling material for primary rainwater is convenient to replace; the later running and maintenance requirements of a rainwater inlet are low, and overflowing rainwater can be drained from an overflow passage arranged between the flow guide groove and the overflow baffle plate.

The invention discloses a screen pipe, a string and a blockage removing method, and relates to the field of oil and gas exploitation. The screen pipe comprises a base pipe, a protecting shell and a pre-filling particle unit; a first opening hole is formed in the side wall of the base pipe; the protecting shell is arranged outside the base tube in a sleeving mode, a second opening hole is formed inthe side wall of the protecting shell, and an annular accommodating cavity is formed between the base pipe and the protecting shell; and the accommodating cavity is filled with the pre-filling particle unit, and the size of the pre-filling particle unit can be changed to be reduced when the preset condition is met. The self-blockage-removing function can be achieved after the screen pipe is blocked, and the oil well productivity is guaranteed.

The invention discloses a high-damping direct-acting-type overflow valve. The high-damping direct-acting-type overflow valve comprises a valve body, an opening P is vertically formed in the lower endof the valve body, an opening T is formed in the side wall of the lower portion of the valve body, a valve opening is formed by the opening P and the opening T, a valve core which cooperates with thevalve opening is vertically arranged in the valve body, a through-flow hole is formed in the center of the valve core, a damping cover sleeves the upper portion of the valve core, a damping plunger isarranged in the center of the damping cover and is inserted into the through-flow hole, a damping gap is reserved between the outer wall of the damping plunger and the inner wall of the through-flowhole, a damping cavity is formed by the upper end face of the valve core and the damping cover and is communicated with the opening P through the through-flow hole, and a spring which cooperates withthe valve core is arranged outside the damping cover. The high-damping direct-acting-type overflow valve has the advantages that the structure is compact, pressure generated by the damping cavity is utilized, the rigidity needed by the spring is greatly reduced while the overflowing capacity of the valve is guaranteed, and thus the overall size of the valve is greatly reduced; meanwhile, the damping cavity is utilized for oil pressure adjustment, and the stability during starting and closing can be guaranteed.

The invention discloses a method for implementing a single point grounding design, a single point grounding PCB package and a printed circuit board. The method comprises the steps that a PCB is provided and at least comprises a signal layer and a main horizontal layer; the single-point grounding PCB package is designed on the PCB, including a single-point grounding device and a single-point grounding vent hole; the single-point grounding device is arranged on the main horizontal layer, and is communicated with the horizon of the main horizontal layer; the single-point grounding vent hole runs through the signal layer, is communicated with the single-point grounding device, and is isolated from the signal region in the signal layer; and the single-point grounding PCB package is called when single-point grounding design is required to implement. Therefore, single-point grounding is used as an independent device for processing, and the device is provided with graphic symbols corresponding to a schematic circuit diagram and a package structure corresponding to PCB, so that standard design and automatic processing of single-point grounding can be realized, and the design efficiency and reliability of PCB can be improved.

The invention is suitable for the technical field of test and provides a low-impedance contact conductive test electrode. A sleeve provided with an accommodation cavity is sleeved on a pin rod of a probe, a first spring is abutted between the side wall of the pin rod of the probe and the side wall of the accommodation cavity of the sleeve, a second spring is abutted between the tail end of the probe and the closed end of the accommodation cavity, and the pin rod of the probe is provided with an anti-drop device to prevent the probe from dropping from the sleeve, so that when the probe makes contact with and is pressed by an electrical element under test, the probe and the sleeve can be still in good electric connection even if the axial deviation and angle deviation occur, discharge capacity of the electrical signal is ensured, and test effect and test efficiency are guaranteed.

The invention discloses a collector plate structure of a novel circular lithium ion battery and a welding method. According to the collector plate structure, a hole is formed in the middle of a negative collector plate, four fan-shaped cutting lines with the bottoms not closed are evenly arranged on the negative collector plate, two cutting straight lines in the radial direction are symmetrically arranged at the roots of the fan-shaped cutting lines with the bottoms not closed, cutting fold lines are arranged in the cutting straight lines on the negative collector plate, and the corners of the cutting fold lines are fillets; four fan-shaped cutting lines are uniformly arranged on the positive collector plate, two cutting straight lines in the radial direction are symmetrically arranged at the arc center of each fan-shaped cutting line, a cutting fold line is arranged in an area in the two cutting straight lines of the positive collector plate, the corner of the cutting fold line is a fillet, and the positive collector plate and the positive pole are subjected to bottom welding; and the negative collector plate is welded with the shell by laser. The collector plate structure and the welding method are simple and easy, and are suitable for various round all-tab rubbing processes, and the size of the adjustable collector plate is set according to different batteries, so that the overcurrent capability of a battery cell is ensured.

The invention discloses a hydrogen energy automobile bipolar plate ultrahigh-speed precision welding process and a welding clamp thereof, and belongs to the field of hydrogen energy automobile production. A bipolar plate to be welded is included and installed on the welding clamp, the bipolar plate is moved to the mechanical welding position through a high-speed moving platform, characteristic information preset on the bipolar plate is grabbed after photographing and compared with characteristics in a photographing template, a laser beam passes through an axial lens of a galvanometer, a second shaft of the galvanometer drives the laser beam to move to the welding track end point from the welding track starting point, a complete welding line is finally formed along with movement of the galvanometer, an upper single-pole plate and a lower single-pole plate are welded together, and welding of the bipolar plate is achieved. When the process is used for welding the bipolar plate, the welding process and the welding line width are extremely stable, obvious fluctuation is avoided, the pseudo soldering problem is not likely to happen, the welding strength is high, the welding line is flat, the overcurrent capacity of the welding line is guaranteed, and the product performance of a hydrogen fuel cell is greatly improved.

The invention discloses an electrode terminal and a preparation method thereof, a battery cover board assembly, a battery, a battery bank, a battery pack and an electric vehicle. The electrode terminal comprises a connector (1) with an insertion end and a leading-out terminal (2) with a slot, wherein the insertion end comprises an external connection region, an extended positioning pin and a transition region (3); the transition region is connected with the external connection region and the positioning pin; the slot comprises an internal connection region, a free deformation region (6) and a matching region (5); the free deformation region (6) is located between the internal connection region and the matching region (5); the positioning pin passes through the internal connection region and the free deformation region (6) and is inserted into the matching region (5); the positioning pin and the matching region (5) are in interference fit; and the external connection region is connected with the internal connection region in an atom binding manner. The electrode terminal has dual connection; and the connection reliability of the connector and the battery is ensured.

The invention relates to the technical field of power electronic capacitors, and especially relates to a DC-link capacitor used for alternating current / inversion equipment as direct current link and filtering, in particular to a thin film capacitor applicable to a DC-link occasion. The thin film capacitor has the advantages of large capacity, small size, low cost, reliability, stability, high safety performance and the like. The thin film capacitor can extensively replace electrolytic capacitors in the DC-link occasions of the power electronic field. The thin film capacitor comprises a capacitor core and is characterized in that the capacitor core is formed by winding a metallized polypropylene thin film, wherein the metallized polypropylene thin film comprises a polypropylene thin film medium and a capacitor plate, and the capacitor plate is a metal coating plated on the polypropylene thin film medium in an evaporation manner.

The invention relates to a plate-connected plate heat exchanger. The plate-connected plate heat exchangercomprises end pressing plates and heat exchange plate bundles, and the heat exchange plate bundlesare disposed between the end pressing plates.The plate-connected plate heat exchanger further comprises communication plate bundles. The heat exchange plate bundles are arranged at intervals between the end pressing plates. The plurality of sets of heat exchange plate bundles are connected to each other in a series, parallel or parallel serial manner by the communication plate bundles, and theheat exchange plate bundles and the communication plate bundles are clamped and fixed by the end pressing plates.According to the plate-connected plate heat exchanger, the problem that the large heatexchange plate is easy to be deformed and water leakage occurs can be overcome, the maintenance workload and cost reduction are facilitated, the service life of the heat exchanger is prolonged, heat exchange efficiency is high, and combination is flexible. A matching custom function is realized according to the requirements, installation environment and other needs, the structure is compact, the space is small, and the transportation is more convenient.

The invention discloses an electric connection assembly of a lithium battery. The electric connection assembly comprises a first connecting piece, a second connecting piece and a welding layer, wherein at least one connecting hole is formed in the first connecting piece; one end of the second connecting piece is inserted in the connecting hole and is riveted with the first connecting piece; the second connecting piece is electrically connected with a cell pole of the lithium battery to be connected; the welding layer is arranged between the other end of the second connecting piece and the first connecting piece; and the first connecting piece is electrically connected with the output terminal of the lithium battery to be connected. According to the electric connection assembly of the lithium battery provided by the invention, the assembling requirement of the lithium battery can be met, the overcurrent capacity of the electric connection assembly can be guaranteed, and meanwhile the production yield is high.

The invention provides a battery adapter piece welding method which comprises the steps that an adapter piece and a top cover pole of a battery are arranged, and blue laser is output to the surface of the adapter piece through a laser so that the adapter piece and the top cover pole can form a liquid molten pool surface; the laser outputs fiber laser to act on the surface of the liquid molten pool, so that the surface of the liquid molten pool absorbs the fiber laser to form a keyhole; and a laser emitting unit of the laser is driven by a moving shaft to move to form a welding track, so that the adapter piece is welded to the top cover pole, and the adapter piece is made of copper. The blue laser and the optical fiber laser are adopted in a welding mode, so that the overall laser utilization rate is high, adapter piece laser welding application can be completed with low total power, the cold joint problem is not prone to occurring, welding is free of splashing, the overcurrent capacity of a welding seam is guaranteed, and the product performance of the square shell battery is greatly improved.

The present invention provides an electrode member, a pole piece, a manufacturing method thereof and a battery, and belong to the field of batteries. The electrode member includes a metal wire, a polymer base film having a first through-hole, a conductive layer formed on a surface of the polymer base film, and a metal foil. The conductive layer has a main body portion, a first overlapping portion extending from the main body portion, and a second through hole formed in the first overlapping portion. The metal foil is provided with a second overlapping part provided with a third through hole. The second overlapping part of the metal foil is tightly attached to the first overlapping part of the conductive layer through a metal wire. The metal wire penetrates through the first through hole, the second through hole and the third through hole. The electrode member has relatively smaller weight and lower manufacturing cost and space occupation.

The invention relates to a battery assembly and a mobile terminal, the battery assembly comprises a battery body, and an accommodating area is formed on the battery body; the tabs are arranged on the battery body and comprise N first tabs and one or more second tabs; the protection plates comprise N first protection plates, N is an integer greater than or equal to 2, the N first protection plates are connected with the N first tabs in a one-to-one correspondence manner, and the N first protection plates are folded and attached to the accommodating area through the N first tabs. According to the embodiment of the invention, the plurality of tabs are connected with the plurality of protection plates in the one-to-one correspondence manner, and the plurality of protection plates are folded and attached to the accommodating area of the battery body, so that the size of the protection plates can be effectively reduced, the overcurrent capability of the protection plates can be ensured, the occupied space of the battery assembly can be reduced, and the capacity of the battery is effectively improved.

The invention relates to a combined plate heat exchanger with an external communicating passage. The combined plate heat exchanger comprises end pressing plates, heat exchange plate bundle units and outer pipes. The end pressing plates comprise a fixed pressing plate and a movable pressing plate, and the fixed pressing plate and the movable pressing plate are vertically arranged side by side. Theheat exchange plate bundle units are evenly mounted between the fixed pressing plate and the movable pressing plate. A plurality of mounting locating holes corresponding to the ends of the heat exchange plate bundle units are arranged on the end pressing plates, and every two mounting locating holes form a group. The end pressing plates and the heat exchange plate bundle unit are connected and fixed by every group of mounting locating holes through fixing devices. A plurality of inlet and outlet hole sets corresponding to the ends of the outer pipes are formed in the fixed pressing plate or the movable pressing plate. The combined plate heat exchanger has the beneficial effects that the use ranges of the heat exchanger is widened, the flow capacity of the heat exchanger is guaranteed, andtherefore the heat exchange efficiency is improved; and the phenomenon of water leakage caused by plate deformation is avoided, and manual assembling is convenient.

The invention discloses a cell connection sheet, a battery and an assembly method. The cell connection sheet includes a body, a cell connection part and a welding connection part. The cell connection part is arranged on one side of the body and is electrically connected to the tab of the cell. The welding connection part is arranged on the other side of the body, electrically connected with the pole of the battery, and the welding connection part can be bent relative to the body. By setting the battery connection part on the battery connection piece, the tabs of the battery can be welded and fixed on the battery connection part one by one, so as to realize the pre-collection of the positive and negative poles of the battery and avoid the positive and negative of all the batteries. The poles are directly welded on the pole of the battery, and at the same time, it can ensure the overcurrent capacity of each connection position during the current collection process of the battery. In addition, the welding connection part on the cell connection piece is connected to the pole of the battery, and finally realizes the current collection of the positive and negative electrodes of multiple cells, which can avoid the welding difficulty caused by the excessive number of tabs welded on the pole. Thereby improving welding quality.

The invention discloses a current collector assembly, a battery cell and a battery pack. The current collector assembly comprises at least two tab groups, wherein each tab group comprising a plurality of tabs arranged in a stacked manner; a conductive connection component which comprises at least three conductive connection sheets, wherein the at least three conductive connection sheets are arranged at intervals in the thickness direction of the conductive connection sheets, and one tab group is stacked between every two adjacent conductive connection sheets; and at least one of the two adjacent conductive connecting sheets is electrically connected with each tab in the tab group. According to the current collector assembly provided by the embodiment of the invention, the welding difficulty of the conductive connecting sheet and the tab group can be reduced, false soldering or pseudo soldering is avoided, the welding effect is ensured, and the overcurrent capability of current is improved.

The invention discloses a flexible multifunctional gutter inlet sewage intercepting bag and a catch basin, and relates to the technical field of drainage. Comprising a flexible sewage intercepting bag which is mainly made of fabric, and the sewage intercepting bag is composed of a flow guide area, an overflow sewage intercepting area and a sediment filtering storage area which are connected in sequence. The diversion area is provided with an inclined diversion surface, and the bag opening is provided with a reinforcing ring; a plurality of overflow ports are formed in the circumferential direction of the overflow trash holding area; the end, away from the overflow trash holding area, of the sediment filtering storage area is closed. The sewage intercepting bag is installed in the catch basin through a hanging part arranged on the inner wall of the catch basin or the rainwater grate. The sewage intercepting bag can efficiently intercept various pollutants and reduce non-point source pollution while the water passing capacity of the gutter inlet is ensured; clogging of the drainage system is prevented, and dredging workload is reduced; mosquitoes and flies are prevented from breeding, and urban environmental sanitation is improved. The method can be used for construction of various types of gutter inlets and transformation of existing gutter inlets, and then a novel method which is simple, convenient, practical, efficient in operation and low in cost is provided for construction management of the gutter inlets.

The invention is suitable for the technical field of test and provides a low-impedance contact conductive test electrode. A sleeve provided with an accommodation cavity is sleeved on a pin rod of a probe, a first spring is abutted between the side wall of the pin rod of the probe and the side wall of the accommodation cavity of the sleeve, a second spring is abutted between the tail end of the probe and the closed end of the accommodation cavity, and the pin rod of the probe is provided with an anti-drop device to prevent the probe from dropping from the sleeve, so that when the probe makes contact with and is pressed by an electrical element under test, the probe and the sleeve can be still in good electric connection even if the axial deviation and angle deviation occur, discharge capacity of the electrical signal is ensured, and test effect and test efficiency are guaranteed.

The invention discloses a screen pipe, a pipe string and a method for unblocking, and relates to the field of oil and gas exploitation. The screen pipe comprises: a base pipe, a side wall of the base pipe is provided with a first opening; A protective shell outside the tube, the side wall of the protective shell has a second opening, and an annular accommodating cavity is formed between the base pipe and the protective shell; the pre-filled particle unit filled in the accommodating cavity, The volume of the pre-filled particle unit can be changed to shrink when a preset condition is met. The present application can realize the function of self-blocking after the screen pipe is blocked, so as to ensure the productivity of the oil well.

The invention discloses a high trigger voltage thyristor. The high trigger voltage thyristor comprises a plastic package body, the plastic package body is internally provided with a thyristor chip anda diode chip, and the plastic package body is further provided with a control electrode G, an anode A, a cathode K and a lead. The diode chip is arranged on the control electrode G, one circuit of the thyristor chip passes through the diode chip and is connected to the control pole G, and the other circuit of the thyristor chip is connected to the cathode K. The high trigger voltage thyristor hasa high trigger voltage, the thyristor is effectively prevented from being triggered to be opened by a mistake under a strong electromagnetic pulse environment, the reliability is high, the trigger voltage can be precisely controlled through the voltage size of a control electrode series diode, and the high trigger voltage thyristor can be adapted to various application circuits and a new drive circuit is not required to be redesigned.

The invention discloses a switch power supply integrated chip board card layout structure. The structure comprises a printed circuit board. A front GND network is established on the front of the printed circuit board. At least five vias are arranged in the front GND network. A back GND network is laid on the back of the printed circuit board. According to the invention, the GND network is established on the front of the GND network; the GND network is added on the back of the printed circuit board; at least five vias are arranged in the front GND network; the number of vias is increased; the overcurrent capability is effectively ensured; the heat radiating area of a switch power supply integrated chip is increased; the temperature of the switch power supply integrated chip is reduced; thepower loss of the switch power supply integrated chip is reduced; energy is saved; and the power cost of a customer is reduced.

The invention relates to the technical field of connectors, and provides a connector with built-in mounting holes. The connector comprises a main body, wherein the main body is of a rectangular structure, and a rectangular groove is formed in the main body; the end face of the main body is provided with an annular boss; the interior of the annular boss is provided with first mounting holes and guide sleeves; the center of the main body is provided with a contact element cavity; and second mounting holes are formed in the periphery of the contact element cavity. The fixed mounting holes of the connector are formed in the inner side of the annular boss, so that the outline dimensions of the main body are reduced, and sealing failures caused by improper sealing at the positions of the mounting holes are also avoided; moreover, the annular boss on the end face of the main body is arranged, on one hand, when the connector is in seal fit, the compression sealing of the end face is met, and the sealing matched with an inclined plane is also met; and on the other hand, the connector can effectively prevent sealing failures, caused by dimension error during processing, assembling and mounting, of car bodies, batteries and replacing systems.

The invention discloses a contact pin assembly capable of achieving direct-current charging interface replacement. The contact pin assembly comprises a contact pin matrix, an elastic contact part, an insulation cap and a sleeve; the sleeve is arranged at the head of the contact pin matrix in a sleeving mode and locked through a locking part, and the elastic contact part is arranged between the head of the contact pin matrix and the sleeve in a sleeving mode, so that the sleeve and the contact pin matrix are in elastic contact for conduction. The insulation cap is fixed to the head of the contact pin matrix through a locking part. The sleeve in the contact pin assembly can be replaced and can be independently replaced after being abraded, and a whole direct-current charging gun wiring harness does not need to be replaced. Besides, when the sleeve is abraded, the sleeve can be replaced by taking down and re-locking the locking part, and operation is convenient and fast. Besides, the locking force of the elastic contact part guarantees the structural strength and can provide continuous positive pressure for end face contact of the contact pin matrix and the sleeve, and the overcurrent capacity of the contact pin assembly is guaranteed.