24 results about "Electrode polarity" patented technology

The invention discloses a short circuit welding polarity switching method and device and a readable storage medium, and belongs to the technical field of welding. The method aims at solving the polarity switching problem of an existing negative polarity positive and negative wire feeding short circuit, and comprises the steps that when welding of a welding gun is initialized, the electrode polarity is adjusted to be positive, and the arcing state, the short circuit state and the arc striking state are detected; if positive arcing and successful arc striking are detected and a first short circuit state is detected, outputting a preset positive current value, controlling the wire feeding speed of positive wire feeding to be reduced to zero, then switching the electrode polarity to be negative, and outputting a preset negative current value for controlling reverse wire feeding, so that the wire feeding speed of reverse wire feeding is accelerated; and after the preset negative current value is maintained for a set time, output of the preset negative current value is stopped, and short-circuit welding is continuously conducted with the negative polarity of the electrode. The electrode polarity can be automatically switched and the welding current can be dynamically controlled according to the working condition of the welding gun, so that the electrode polarity is switched under the optimal condition, and meanwhile, the stability of an electric arc during electrode polarity switching is ensured.

The invention discloses a passive bipolar movable mask electrochemical machining device and method for a workpiece. The device comprises a power supply control system, an electrochemical machining system, a motion control system and an electrolyte circulating system, the electrochemical machining system is provided with a first electrochemical machining tank and a second electrochemical machining tank which are oppositely arranged, two electrodes are arranged in each electrochemical machining tank, and two movable masks are pressed and attached to the two faces of a workpiece to form a mask structure. The motion control system drives the two grooves to be closed or separated; the electrolyte circulating system forms flushing and sucking liquid circulation facing the surface of a workpiece through a flushing pipe and a liquid sucking pipe; the power supply control system intermittently switches the polarities of the two electrodes, so that charge distribution on the two sides of the workpiece is alternately changed, and passive bipolar electrochemical machining is realized; according to the method, photoresist is replaced by the movable mask, the process is simplified, the efficient liquid flushing and absorbing mode and the electrostatic induction machining mode are combined, the inter-electrode mass transfer and electric field uniformity are remarkably improved, and the machining efficiency, precision and depth-diameter ratio are improved.

The invention discloses a PFAS wastewater degradation method based on an alternating current technology, which comprises the following steps: constructing a three-electrode system by using the same electrode material as a cathode and an anode and using an Ag / AgCl electrode as a reference electrode, and degrading PFAS in wastewater by applying alternating currents with different intensities. The periodic polarity inversion of the electrode is realized by adjusting the alternating current frequency, so that the surface reaction environment of the electrode is dynamically changed. The problems of electrode polarization and by-product accumulation in a traditional electrochemical method are effectively avoided, more active sites and oxidizing substances are generated on the surface of the electrode, so that the degradation efficiency and defluorination rate of PFAS are remarkably improved, and excellent redox synergistic effect and environmental sustainability are shown. Compared with the traditional direct current technology, the method has the advantages that the unique advantages of alternating current are utilized, the degradation efficiency is improved, the service life of the electrode is prolonged, the energy consumption is reduced, and an efficient, environment-friendly and economical solution is provided for PFAS wastewater treatment.

This application discloses a self-cleaning electrolysis module and electrolysis equipment. The self-cleaning electrolysis module includes a shell and an electrolysis space within the shell. The electrolysis space is divided into a first chamber with a first electrode and a second chamber with a second electrode by a first separator. The first and second electrodes have opposite polarities and their polarities can be switched. The first separator is an ion channel for cations. The first chamber is provided with a first inlet pipe and a first outlet pipe, and the second chamber is provided with a second inlet pipe and a second outlet pipe. The first and second inlet pipes are arranged in parallel. When the electrode in any chamber is an anode, the inlet and outlet pipes of the current chamber are connected, and the inlet pipes of adjacent chambers are disconnected. The self-cleaning electrolysis module of this application can output electrolysis products with high redox potentials and can also achieve self-cleaning of scale in the chamber by switching electrode polarities.

The invention is applicable to the field of photovoltaic technology, and provides a battery assembly and a photovoltaic system, the battery assembly comprises a plurality of three-terminal laminated batteries arranged in sequence, the three-terminal laminated batteries comprise a top battery and a bottom battery arranged below the top battery, the top battery is provided with a first electrode, and the bottom battery is provided with a second electrode; a second electrode and a third electrode are respectively arranged on the bottom battery, the first electrode and the second electrode have the same polarity, and the first electrode and the third electrode have different polarities; the first welding strips are connected with the first electrode of one three-end laminated battery and the third electrode of the other three-end laminated battery; and the second welding strips are connected with the second electrode of one three-end laminated battery and the third electrode of the other three-end laminated battery. Electrical series connection between the top batteries of different three-end lamination layers is achieved, electric energy of different batteries is integrated, the performance of the battery assembly is further optimized, and the output power is improved.

The utility model relates to a box type industrial cooling water treatment instrument which comprises a box body, an electrode tube and an electrode changing mechanism, two groups of partition plates are arranged in the box body at intervals, the partition plates and the box body form a descaling area, the side wall of the descaling area is provided with a water inlet and a water outlet, the electrode tube is arranged in the descaling area, and the electrode tube is arranged in the descaling area. The two ends of the electrode tubes are connected with the partition plates arranged at intervals respectively, the tops of the electrode tubes penetrate through the partition plates above, the penetrating ends of the electrode tubes are in contact with the electrode changing mechanism, the polarity of the electrode tubes can be changed by designing the electrode changing mechanism, when the polarity is changed, an original anode is changed into a cathode, and when the polarity is changed, the original anode is changed into the cathode. The original cathode is changed into the anode, the oxidation-reduction environment on the surface of the electrode is reversed, and the oxidation state and the reduction state of sediments, such as metal oxides and the like, attached to the electrode are correspondingly changed under the new electrode polarity, so that the chemical stability of the sediments is reduced, and the sediments are more easily stripped from the surface of the electrode.

The utility model relates to the field of fire prevention and control, and discloses a water mist guiding system and fire-retardant explosion-suppression equipment, and the water mist guiding system comprises a charging module and an acceleration guiding module. The charging module is used for being in butt joint with a mist outlet of the atomizer and charging water mist discharged from the mist outlet; the acceleration guide module comprises a first polar plate and a second polar plate which are opposite in electrode polarity and can generate acceleration electric field force, the charging module is located between the first polar plate and the second polar plate, the electrode polarity of the first polar plate is the same as that of charged water mist, the first polar plate is used for being arranged corresponding to the mist outlet, and the second polar plate is used for being arranged corresponding to a to-be-protected area; the first pole plate and the second pole plate are used for accelerating migration of charged water mist through accelerating electric field force. According to the atomizer, the charged module is arranged at the mist outlet of the atomizer, sprayed water mist is converted into charged water mist, migration of the charged water mist is accelerated through the accelerating electric field force generated between the first polar plate and the second polar plate, and the charged water mist can directionally move and rapidly reach the to-be-protected area.

The invention relates to the field of wastewater treatment, and discloses an electroplating wastewater treatment system which comprises a physical pretreatment module, a dynamic pulse acoustoelectric reaction module, a resource recovery and electrode regeneration module and a central process control module, wherein in the dynamic pulse acoustoelectric reaction module, through the synergistic effect of a sound field constructed by an ultrasonic transducer and a pulse electric field constructed by a programmable pulse power supply, stable metal complexes in the wastewater are broken through acoustochemistry, and released metal ions are reduced and deposited on a three-dimensional porous working electrode through electrochemistry. The central process control module is used for periodically switching between a main reaction stage and an electrode activation stage, in the electrode activation stage, the polarity of the electrode is reversed, the working electrode serves as an anode, organic and inorganic passivation layers accumulated on the surface of the working electrode are removed in situ, the electrochemical activity of the working electrode is recovered, high-purity metal is recycled in an electrolytic stripping mode, and the high-purity metal is recycled. And regeneration and reuse of the electrode substrate are realized.

The present application belongs to the field of electrokinetic remediation of heavy metal contaminated soil, and particularly relates to a method for in-situ electrokinetic remediation of heavy metal contaminated soil. Specifically, a hollow functional material with an inner cavity is pre-embedded in the middle transition zone of the contaminated soil area to be treated; a direct current electric field is applied to both ends of the contaminated soil area to be treated, which drives the migration of heavy metal ions in the initial anode region to the middle transition zone, promotes the aggregation of colloids in the zone, compresses the soil pores, and forms an ion bypass channel with the inner cavity of the hollow functional material; when the physicochemical characteristics of the middle transition zone reach the threshold condition, the polarity of the electrodes at both ends of the contaminated soil area to be treated is switched; the reverse electric field promotes the migration of heavy metal ions in the initial cathode direction to the bypass channel formed above, and in-situ enrichment and stable remediation are realized with the counter-migrating stabilized ions in the bypass channel. The method breaks through the mass transfer limitation of traditional electrokinetic remediation, and realizes efficient spatial enrichment and synchronous stabilization of heavy metals.

The present invention discloses an interconnection sheet and connection method for solar cells, which are suitable for working environments with large temperature differences and a large number of cycles, and belong to the technical field of solar cell circuit manufacturing for space use. More specifically, it relates to a high-reliability electrical interconnection structure with thermal stress matching, in which solar cells with welded interconnection sheets are respectively pasted on a substrate, with the interconnection sheets exposed upward, and two interconnection sheets are welded together by butt welding equipment to form a two-handed palm-shaped structure, which can be connected in series or in parallel according to the electrode polarity. The interconnection sheet design can form a directional stress-reducing arc during connection, and is easy to weld. This method can avoid the welding process on the surface of the solar cell when the solar cells are connected in series and parallel, reduce the process threshold and cost, and improve the efficiency of solar cell circuit manufacturing.

This invention proposes a cross-current output device based on electrode polarity reversal, comprising an electrode output terminal, an electrode group selection module, a main control unit, a polarity control module, and a synchronous monitoring module. The electrode group selection module has multiple preset electrode combinations built in, each preset electrode combination corresponding to an electrode group connected to the electrode output terminal. The main control unit calls one of the preset electrode combinations to determine the target electrode group and controls the polarity control module to alternately switch the positive and negative connection states of the output path corresponding to at least one group of electrodes in the target electrode group according to a preset timing sequence. The synchronous monitoring module collects the polarity state information and timing information of each electrode in the target electrode group, and sends a correction control signal to the main control unit when the timing information is inconsistent with the preset timing information, so that the electrode output terminal forms a cross-current output based on the alternating switching of the positive and negative connection states, thereby improving the consistency and stability of the output process.

The invention discloses a method and a system for strengthening cell-breaking dehydration and detoxification of sludge, and the method comprises the following steps: under an acidic condition, electrolyzing the sludge by adopting an electrochemical device which takes an electrode material containing ruthenium element and iridium element as a cathode and an anode; wherein in the process of electrolyzing the sludge, the polarity of the electrode is reversed once every preset time. According to the scheme, the efficient ruthenium-iridium electrode electrochemical oxidation technology and the periodic electrode polarity reversal strategy are combined, and an efficient, stable and economical solution is provided. Under the acidic condition, the efficient ruthenium-iridium electrode can generate various strong oxidizing substances, so that a large amount of bound water is released to remarkably improve the dehydration performance, and toxic and harmful organic matters in the ruthenium-iridium electrode can be effectively released. By periodically reversing the polarity of the electrode, a passivation layer formed on the surface of the electrode due to scaling or adhesion of organic matters can be effectively removed, so that the long-term stability and high current efficiency of the treatment process are ensured.

The utility model relates to the field of solar cells, in particular to a photovoltaic module and a photovoltaic system. The assembly comprises a first battery string and a second battery string which are connected through a middle bus bar, the first battery string comprises a first battery piece, the second battery string comprises a second battery piece, a third battery string and a fourth battery string which are connected through a middle bus bar, the third battery string comprises a second battery piece, and the fourth battery string comprises a second battery piece. The fourth battery string comprises a first battery piece, the first battery string and the third battery string are arranged side by side in the extending direction of the middle bus bar, the second battery string and the fourth battery string are arranged side by side, and the first battery piece and the second battery piece located on the two sides of the bus bar are the same in electrode polarity on the same straight line. And the first battery piece and the second battery piece are mirror image half battery pieces. According to the photovoltaic module, the welding effect of the middle bus bar and the welding strip is good, and the appearance of the photovoltaic module is attractive.

In a forward / reverse feed control arc welding method in which the welding wire feed speed Fw is set to the forward feed peak value during the arc period and to the reverse feed peak value during the short-circuit period, the welding state is stabilized during the period from time t4 to t6 when the short circuit is released, the arc is regenerated and the feed speed Fw changes from the reverse feed peak value to the forward feed peak value. [Solution] In a forward / reverse feed control arc welding method in which the welding wire feed speed Fw is set to the forward feed peak value during the arc period and to the reverse feed peak value during the short circuit period, and welding is performed by applying a welding current Iw with positive electrode polarity, at the start of the arc period, the feed speed Fw is reduced from the reverse feed peak value to 0 during the reverse feed deceleration period from time t4 to t5, and the electrode polarity is switched to negative for at least the duration of the reverse feed deceleration period.

In consumable electrode AC pulsed arc welding, the goal is to suppress the amount of spatter generated even when a short circuit occurs between the welding wire and the base metal, thereby achieving good welding quality. [Solution] In an AC pulsed arc welding control method in which welding is performed by repeatedly applying a welding current Iw during the peak rise period, peak period, peak fall period, and base period with positive electrode polarity, and during the electrode negative polarity period, with the welding wire feeding speed Fw is set to the positive feed peak value during the peak period at time t2 to t3, to a base period positive feed value smaller than the positive feed peak value during the base period at time t4 to t41 so that a short circuit occurs during the base period, to the reverse feed peak value when a short circuit occurs at time t41, to maintain the reverse feed peak value even if the short circuit is released at time t42, and to the electrode negative polarity feeding speed during the electrode negative polarity period at time t5 to t6.

The invention provides a modular series battery based on special-shaped winding cores and a preparation method thereof, and relates to the technical field of batteries, the modular series battery comprises at least two first-type winding battery cores, and each first-type winding battery core is provided with an electric connection end face; the at least one second-type winding battery cell is provided with two electric connection end surfaces, and the second-type winding battery cell is connected in series between the first-type winding battery cell and the second-type winding battery cell, starting from the first-type winding battery cell and ending from the first-type winding battery cell; every two adjacent winding battery cells are in butt joint through the corresponding electric connection end faces, and a bridging conductive piece is arranged between every two butt-joint electric connection end faces and used for being selectively connected with electrode current collectors of the same polarity. And the electrode leading-out ends of the first type of winding battery cells and the second type of winding battery cells and the leading-out parts of the bridging conductive pieces are connected to the total positive electrode end and the total negative electrode end in parallel according to electrode polarities. The problems that an existing lithium battery is large in high-rate internal resistance, the multi-tab process is complex, the thin battery cell stacking integration efficiency is low, and the reliability is poor can be solved.

The application provides a laser gyro with an auxiliary electrode and a low-pressure rapid starting method, and relates to the technical field of laser gyros.The laser gyro comprises a frame with a cavity, the cavity comprises a capillary, two first electrodes, a second electrode and an auxiliary electrode are symmetrically arranged on the frame, the first electrodes and the second electrode are opposite in polarity, the second electrode is located between the two first electrodes, the auxiliary electrode is arranged close to the second electrode, the auxiliary electrode is the same in polarity as the first electrode, a control circuit is arranged on one side of the frame, and an optical auxiliary device is further arranged on the frame.By arranging the auxiliary electrode near the second electrode, the discharge channel distance between the auxiliary electrode and the second electrode is shorter, the charge density of the discharge end of the auxiliary electrode is improved, the ionization energy of the working gas can be effectively reduced by the light ionization effect of the optical auxiliary device, the working gas in the capillary can be broken down within a few hundred milliseconds, and the starting speed is greatly improved compared with the starting time of several seconds of a traditional laser gyro.

This battery may comprise: a case; and an electrode assembly disposed in the case. The electrode assembly may comprise: first electrodes; second electrodes each disposed between the first electrodes and configured to have a polarity different from that of the first electrodes; and a circumferential securing structure surrounding the first electrodes and the second electrodes so as to secure the positioning between the first electrodes and the second electrodes. The circumferential securing structure may comprise: a first portion configured to have the same polarity as the first electrodes and forming the upper portion of the electrode assembly; a second portion configured to have the same polarity as the first electrodes and forming the lower portion of the electrode assembly; and a third portion extending from the first portion, across the first electrodes and the second electrodes, and to the second portion so as to secure the first electrodes and the second electrodes to each other along with the first portion and the second portion.

The power storage device of the present application includes: an electrode body (200) including a first electrode (240), a second electrode (210) having a polarity different from that of the first electrode (240), and a first electrode tab group (250, 280) electrically connected to the first electrode (240); a case (100) that houses the electrode body (200); a first conductive member (420) connected to the first electrode tab group (250, 280); a second conductive member (440) connected to the first conductive member (420); and an insulating member (460) disposed between the first conductive member (420) and the second conductive member (440), the first electrode tab group (250, 280) being located at an end portion of one side of the electrode body (200), and the insulating member (460) being connected to the first conductive member (420).

The invention discloses a sludge reduction method and system based on electrochemical sludge pretreatment, and relates to the technical field of water treatment engineering.The method comprises the following steps that ion concentration distribution data in an electrolytic bath is obtained through a microelectrode array; constructing a concentration gradient matrix according to the ion concentration distribution data; calculating a salt crystallization probability value based on the concentration gradient matrix, when the ion concentration change rate of the concentration gradient matrix exceeds a preset threshold value, dynamically adjusting a corresponding regional electrode polarity sequence according to a regional electrode adjustment rule, and when the salt crystallization probability value is greater than a set risk threshold value, dynamically adjusting a corresponding regional electrode polarity sequence according to a regional electrode adjustment rule. A high-frequency pulse mode is triggered to physically damage a crystallization layer, and decomposition of sludge organic matter is promoted. According to the method, ion concentration real-time monitoring and dynamic electrode polarity regulation are deployed in the electrolytic bath, an electrode polarity self-adaptive adjustment mechanism is constructed, a regional polarization priority index is provided, and a strategy of dynamically adjusting an electrode polarity sequence as required is realized in combination with an ion migration speed and a concentration gradient.

The application provides a laser gyro with an auxiliary electrode and a low-pressure rapid starting method, and relates to the technical field of laser gyros.The laser gyro comprises a frame with a cavity, the cavity comprises a capillary, two first electrodes, a second electrode and an auxiliary electrode are symmetrically arranged on the frame, the first electrodes and the second electrode are opposite in polarity, the second electrode is located between the two first electrodes, the auxiliary electrode is arranged close to the second electrode, the auxiliary electrode is the same in polarity as the first electrode, a control circuit is arranged on one side of the frame, and an optical auxiliary device is further arranged on the frame.By arranging the auxiliary electrode near the second electrode, the discharge channel distance between the auxiliary electrode and the second electrode is shorter, the charge density of the discharge end of the auxiliary electrode is improved, the ionization energy of the working gas can be effectively reduced by the light ionization effect of the optical auxiliary device, the working gas in the capillary can be broken down within a few hundred milliseconds, and the starting speed is greatly improved compared with the starting time of several seconds of a traditional laser gyro.

A power storage device comprises: a bottomed tubular case (16); an electrode element (14) which is disposed in the case (16) and has a first electrode, a second electrode having a polarity different from that of the first electrode, and a separator (13), and in which the first electrode and the second electrode are wound with the separator (13) interposed therebetween; and a current collector plate (19) which is fixed to the bottom (68) of the case (16) and is fixed to the axial end of the electrode element (14). The current collector plate (19) has: a body (60) fixed to an end portion of the electrode element (14); a covering part (90) protruding from an outer circumferential portion (62) of the body (60) in a direction toward the center of the body (60); and a bent part (91) provided between the outer circumferential portion (62) of the body (60) and the covering part (90). The case (16) and the current collector plate (19) are welded. The body (60), the covering part (90), and the bent part (91) are the same member. The current collector plate (19) is folded at the bent part (91) as the turning point.

The invention belongs to the field of electric remediation of heavy metal contaminated soil, and particularly relates to an in-situ electric locking-stabilizing remediation method for the heavy metal contaminated soil. The method specifically comprises the steps that a hollow functional material with an inner cavity is pre-buried in a middle transition area of a polluted soil area to be treated; applying a direct-current electric field to two ends of the to-be-treated polluted soil area, driving heavy metal ions in the initial anode area to migrate to the middle transition area, promoting colloid aggregation and soil pore compression in the area, and forming an ion streaming channel by virtue of an inner cavity of the hollow functional material; when the physicochemical characteristics of the middle transition area reach a threshold value condition, electrode polarities at the two ends of the polluted soil area to be treated are switched; and heavy metal in the initial cathode direction is promoted to migrate to the formed streaming channel through a reverse electric field, and in-situ enrichment and stable repair are realized in the streaming channel together with oppositely migrated stable ions. According to the method, mass transfer limitation of traditional electrokinetic remediation is broken through, and efficient spatial enrichment and synchronous stabilization of the heavy metal are achieved.

In arc welding, the objective is to prevent welding adhesion between the welding wire and the molten pool at the end of welding, regardless of the welding conditions. [Solution] In an arc welding control method in which, when a welding termination command St is output at time t1, the process transitions from a steady welding period to an anti-stick period, during the anti-stick period the welding wire feeding speed Fw slows down over time due to inertia and stops, and welding is terminated by output control based on the anti-stick voltage setting value with positive electrode polarity, the output polarity is switched to negative electrode polarity during the negative electrode polarity period from time t1 to t11 during part of or the entire anti-stick period from time t1 to t2.