64results about How to "Avoid contact short circuit" patented technology

The invention discloses a high-different frequency isolation broadband double-frequency base station antenna array, which comprises at least one high-frequency antenna unit, a low-frequency antenna unit and a floor board, wherein when one high-frequency antenna unit exists, the high-frequency antenna unit is placed at one side of the floor board, when multiple high-frequency antenna units exist, the high-frequency antenna units are placed at two sides of the floor board respectively, each high-frequency antenna unit comprises multiple oscillator arms and a Balun, the oscillator arms are connected through a distributed inductor, and feeding is carried out through the Balun; the low-frequency antenna unit is placed in the middle of the floor board and comprises multiple oscillator arms and a Balun, the oscillator arms are connected through a distributed capacitor, feeding is carried out through the Balun, the Balun is provided with a feeder line and an H-type microstrip branch, and the H-type microstrip branch is connected with the feeder line. In a condition of not cascading filters, high isolation in a condition in which the distance between the different-frequency antenna units is small and the floor board is small can be realized, insertion loss of a filter is avoided, a stable pattern in a broadband is realized, and due to a decoupling structure, the volume of an antenna unit is not added extraly.

The invention provides a metal lithium battery. The metal lithium battery comprises a battery cell, a positive electrode tab and a negative electrode tab, wherein the battery cell comprises a positive pole plate, a negative pole plate and a separator membrane, the positive pole plate comprises a positive current collector and a positive active material layer, the positive active material layer is arranged on a surface of the positive current collector, the material of the negative pole plate is a metal lithium thin film, the separator membrane is arranged between the positive pole plate and the negative pole plate, the positive pole plate, the separator membrane and the negative pole plate are sequentially laminated, wound or laminated and wound to form the battery cell, the positive pole plate, the separator membrane and the negative pole plate which are sequentially laminated or wound are in close contact without a gap, the positive electrode tab is arranged at one side of the battery cell and is electrically connected to the positive current collector of the positive pole plate, the negative electrode tab is arranged at one side of the battery cell, is formed integratedly with the negative pole plate and protrudes out of the negative pole plate, the metal lithium battery also comprises an electronic insulation coating layer, the electronic insulation coating layer covers one side, at the negative electrode tab, of the positive pole plate, so that the side, at the negative electrode tab, of the positive pole plate, is in electric insulation.

The sensitive structure of the electrostatic force rebalanced pendulum silicon micro accelerometer is the upper and lower glass plates, and the middle is the sensitive mass block of the monocrystalline silicon pendulum structure. The three are connected together by bonding. The double flexible beams of the crystalline silicon sensitive mass are arranged opposite to the lead-out lines of the electrodes. In addition, in order to further reduce the influence of temperature on the monocrystalline silicon pendulum plate, the bonding area is reduced in the design, instead of the overall bonding, three small pieces of bonding are used to ensure that the bonding area of ​​the upper and lower glass plates is completely Consistent, and further reduce the temperature coefficient caused by thermal stress; the manufacturing method of the above-mentioned sensitive structure includes the manufacturing of single crystal silicon pendulum plate and the manufacturing of upper and lower glass cover plates. The invention can reduce the temperature coefficient of the instrument and improve the temperature repeatability, thereby improving the resolution and sensitivity of the silicon micro accelerometer and meeting the requirements of inertial guidance systems such as missiles.

The invention discloses a core structure of a lithium battery and an assembling method of the core structure. The core structure of the lithium battery comprises a positive plate, a negative plate and an isolation membrane, wherein the positive plate and the negative plate are single-face coated plates and are continuously folded to form an E shape, the isolation membrane is continuously folded to form a W-shaped structure, the positive plate and the negative plate are respectively inserted from two sides of the isolating membrane so that the isolating membrane is arranged between positive polarity material layers on the positive plate and negative polarity material layers on the negative plate, the positive polarity material layers are connected with positive tabs or preserved positive tab regions, and the negative polarity material layers are connected with negative tabs and preserved negative tab regions; the positive tabs and the negative tabs or the preserved positive tab regions and the preserved negative tab regions on the positive plate and the negative plate are all arranged at the external end of the whole structure so as to be conveniently connected with external tabs; first insulating material layers or second insulating material layers are further arranged at the turning points of the positive plate and the negative plate to effectively prevent the generation of burrs in folding. The core structure disclosed by the invention has the advantage of a laminated core structure and is free from cutting, a large-power cutting device is omitted, the possibility of generating the burrs can be effectively reduced, and the product quality is improved.

The invention discloses a ball grid array (BGA) package structure, which is characterized in that wire carriages are utilized to support corresponding wires so as to prevent the wires from collapsing in a vertical direction, and effectively separate the wires in an upper layer from the wires in a lower layer. Meanwhile, the wire carriages are provided with rough insulating surfaces, and can further prevent the wires from deviating and being rushed in a horizontal direction. Therefore, the structure can effectively avoid the wires in any two adjacent layers or the left and right wires from generating contact short circuit.

The invention relates to a safe lithium ion power battery. The safe lithium ion power battery comprises a shell. A cathode sheet, an anode sheet and a separating membrane are disposed in the shell. A current collector lug of the cathode sheet is coated with an alumina coating. An anode active compound coating zone of the anode sheet is coated with a PET layer. The separating membrane is a two-sided polymer microsphere separating membrane. The cathode sheet, the anode sheet and the separating membrane form a battery core. The outermost layer of the battery core is coated with a PPT layer. Through a manner of adopting a plurality of the coatings, short circuits caused by contact between the cathode and the anode and contact between the shell and the battery core are avoided, and safety performance of the battery is improved under the premise of not influencing chemical properties of the battery.

The invention relates to the field of lithium batteries, and discloses a pole piece and a laminated electrical core body for a lithium ion battery. The pole piece comprises a metal current collector, the surface of the metal current collector is coated with an active material layer, the metal current collector is provided with a width end part extending to form a pole ear welding part, and the cross-section surface of the width end part of is coated with an insulating silicon layer. Short circuits caused by diaphragm puncture can be effectively avoided when the pole piece is in use.

A conductive-wire and cable fixing supporting device comprises a supporting seat and inserting rod fixing mechanisms. The conductive-wire and cable fixing supporting device is characterized in that mounting holes are formed on two side edges of the supporting seat which is U-shaped, a fixed belt is installed on the bottom surface of the supporting seat, at least one inserting rod fixing mechanism is installed, each inserting rod fixing mechanism is composed of two fixed plates and an inserting rod sleeve, the lower ends of vertical edges of the two fixed plates of each inserting rod fixing mechanism are fixed on the supporting seat through bolts, horizontal edges of each two fixed plates are parallel, and each inserting rod sleeve is fixed between the horizontal edges of each two fixed plates and is located inside a groove of the supporting seat. By means of the conductive-wire and cable fixing supporting device, a conductive wire or a cable can be fixed onto an electric pole through an insulation operation rod in the electriferous state, the fact that operators hold the insulation operation rod by hand to fix the conductive wire or the cable is avoided, labor intensity of the operators is reduced, the conductive wire or the cable is prevented from interphase contacting to cause short circuit or the charged conductive wire or the charged cable swings and contacts the operators, and therefore safety of electric construction is improved.

The invention relates to an on-site electric heating cleaning device for various types of oil tubes and sucker rods pulled out of super high condensate oil wells, super heavy oil wells and super-high wax-bearing oil wells during oil well operation, in particular to an electric heating fused cleaning device for modulating wave oil tubes and sucker rods. The device of the invention is mainly composed of a vehicle-mounted wave production power supply, a pneumatic electrode clamping frame, an electrode clamping frame guide rail, a pneumatic lifting electric clamping frame, a pneumatic tube cleaner, a crude oil recovery device, a pneumatic control circuit, a first supply circuit and a second supply circuit, wherein, the electrode clamping frame is used for inputting electrodes and serves as a pivot; the electrode clamping frame and the pneumatic lifting frame lift and support heated and cleaned oil tubes or sucker rods so as to prevent the body of the oil tube or the sucker from contacting with other electric conduction objects to cause short circuit; the vehicle-mounted wave production power supply is used for intelligently supplying power; the crude oil recovery devices, such as the pneumatic tube cleaner, a woven bag support frame and the like are used for receiving melted rude oil and waxiness in and out of the oil tubes or sucker rods.

The invention provides a low-voltage insulation sheath. The low-voltage insulation sheath comprises a clamping part and an operating part, wherein the clamping part is provided with a line through gap and a clamping cavity, the clamping cavity communicates with the line through gap, the clamping part is made of insulation material, and the operating part is connected with the clamping part so that the line through gap is opened or closed. With the adoption of the technical scheme, a metal contact is only needed to be stored in the low-voltage insulation sheath when live-line low-voltage operation is performed by a worker by arranging the special low-voltage insulation sheath, so that contact short-circuit among metal contacts can be effectively prevented, and the low-voltage insulation sheath has the advantages of time and labor saving and is easy to operate. The insulation property of the low-voltage insulation sheath can be ensured, and a potential risk is eliminated.

This invention relates to a packaging structure which using slotted metal film bearing fight line chip, and it uses a slotted metal film substrate bearing a fight line chip and chip-on-board packaging pattern, in which the slot can provide the weld wire and electrical connect the chip and the film substrate. The film substrate includes a pictorial metal core layer and at least one surface dielectric layer, and the pictorial metal core layer has the plural media and the plural external-connected pads, in which the media arranged around the slot. When the active surface of the chip attached to the film substrate, it can be very close to the pictorial metal core layer, and the pictorial metal core layer will provide good chip cooling path. Moreover, the chip package structure of the film substrate can reduce substrate costs and the thickness of the whole package, and enhance the effectiveness of thermal stress resistance.

The invention discloses a novel electronic component thermal resistance test fixture, and belongs to the technical field of electronic component thermal resistance test. The novel electronic component thermal resistance test fixture comprises a base, a slide block guide rail and a cover plate; the base is of a square structure, and the sliding block guide rail is placed in the center of the base; the cover plate is placed above the sliding block guide rail, and the two sides of the cover plate are fixed through a front guide rail positioning block and a rear guide rail positioning block respectively; a plurality of conductive sliding blocks are connected in the inner guide rails on the two sides of the sliding block guide rail in a sliding manner; each conductive sliding block is vertically and fixedly connected with a conductive sliding block rod; and a component fixing sliding block is placed in the sliding block guide rail, and a screw rod is vertically and fixedly connected to the fixing sliding block. According to the novel electronic component thermal resistance test fixture, pin welding is not needed through contact connection, the thermal resistance test efficiency of the electronic component is improved, and contact short circuit between adjacent pins of the electronic component is avoided.

The embodiment of the invention discloses a chip on film, a display module and a display device. The chip on film comprises a flexible substrate, a plurality of first binding terminals located on one side of the flexible substrate and a first protection layer located on the side, away from the first binding terminals, of the flexible substrate. The first binding terminals are used for being correspondingly bound with electrodes of a binding area of the display panel. The vertical projection of the first protection layer on the flexible substrate and the vertical projection of the first binding terminals on the flexible substrate are overlapped with the cutting line at the same position of the chip on film, and the first protection layer is heated and melted. According to the technical scheme, the problems existing in an existing chip on film can be solved, the quality of the display module is improved, and the production efficiency is improved.

The invention discloses a double-sided plug-in type micro USB B type male-socket connector, which comprises a front iron shell, a back iron shell, an insulating film, a PCB, a main body board and contact terminals. The front iron shell and the back iron shell together enclose a cavity for accommodating the insulating film, the PCB, the main body board and the contact terminals. The main body board comprises an upper main body and a lower main body. The contact terminals comprise an upper terminal and a lower terminal. One end of the upper terminal is connected with the PCB, and the other end of the upper terminal is led out from the upper main body. One end of the lower terminal end is connected with the PCB, and the other end of the lower terminal is led out from the lower main body. The insulating film is clamped between the upper terminal and the lower terminal. The upper terminal and the lower terminal are in the form of copper 5-PIN elastic terminals that are stable in contact effect. After the 5-PIN elastic terminals are led into the front iron shell with the insulating film as an axis of symmetry, the front side and the back side of the front iron shell are the same in structure. According to the technical scheme of the invention, a B type male socket can be inserted into a female socket without the need of distinguishing the front and back sides of the B type male socket. Meanwhile, the short-circuit phenomenon is not easily formed between the contact terminals and the front iron shell, or between the upper terminal and the lower terminal. Therefore, the long-term usage of the B type male socket can be ensured.

The invention discloses a test method, a test fixture and a test device for thin core board layer short risks. The test device comprises a dielectric strength tester, a first current-conducting board and a second current-conducting board, the anode of the dielectric strength tester is electrically connected with the first current-conducting board through a wire, and the cathode of the dielectric strength tester is electrically connected with the second current-conducting board through a wire. Since the first and second current-conducting boards contact with a thin core board electrically and respectively, if short defects are caused to any position on the thin core board relative to conductors at the moment or when the thickness of remaining dielectric is too small, the thin core board is broken down so as to be short. Therefore, whether the thin core board has short risks or not can be judged, if so, the thin core board is picked out to be scraped, rather than being misused continuously to cause scrap of an entire PCB (printed circuit board) during follow-up electronic testing. Evidently, by the test method, fixture and device, the thin core board with the short risks can be found out quickly in advance and is prevented from being misused to the follow-up lamination step, so that cost can be saved greatly, and working efficiency is improved greatly.

The invention relates to the technical field of electronic tags, and discloses a disposable RFID electronic anti-counterfeit tag structure which comprises a base, the bottom of the inner wall of the base is fixedly connected with the outer side wall of a bottom plate, the top of the bottom plate is fixedly connected with the bottom of a tag antenna and the bottom of a tag chip, and the tag chip islocated on the inner side of the tag antenna. A tag antenna and the tag chip are fixedly connected with one ends of the two groups of copper wires respectively. According to the disposable RFID electronic anti-counterfeit tag structure, a white phosphorus sheet and a low-melting-point connecting wire are arranged, after shielding of the white phosphorus sheet is canceled, the white phosphorus sheet makes contact with air, the white phosphorus sheet generates an oxidation reaction, the white phosphorus sheet generates heat in the oxidation reaction process, and heat is transmitted to the connecting wire by a heating hole. Thus, the low-melting-point connecting line is fused, connection between the tag chip and the tag antenna is canceled, and the electronic tag cannot be scanned and used again.

The invention discloses a component-force anti-collision capacitor. The capacitor comprises a pedestal, a side plate, a core body, a rubber ring, several springs, a first guide needle and a second guide needle. The side plate comprises several component force plates. The several component force plates are hinged. Through the above mode, by using the component-force anti-collision capacitor, the several component force plates which are hinged are taken as a shell side plate of the capacitor; when the side plate is under an impact force, the several component force plates are vibrated because ofa stress, the impact force is dispersed step by step and deformation and even burst of the capacitor caused by the impact are prevented. Besides, the springs are used to disperse the impact force onthe capacitor at a vertical direction and damages of the core body caused by violent shaking are prevented. The structure is novel, operation is simple, performance is stable, the capacitor is safe and anti-collision, rigid damages are prevented through multistage force component, the structure is stable, a service long is long, and a wide market prospect in popularity of the component-force anti-collision capacitor is possessed.

The invention discloses a lithium ion battery with high safety pole piece, including a housing, a bare battery core is arranged in the shell, the bare cell includes a cathode electrode sheet and an anode electrode sheet. The cathode pole piece and the anode pole piece are staggered or wound, an isolation film is arranged between the anode pole piece and the cathode pole piece, two sides of the anode pole piece or the cathode pole piece with one end of the pole ear and two sides of the opposite end of the pole ear are provided with a plurality of adhesive strips, and the adhesive strips and theadjacent isolation film are adhered and connected. The adhesive strips can be rapidly solidified at room temperature, melted when the high temperature fixture is formed and bonded to the insulating film under pressure. Bonding of the insulating film can prevent the short circuit of cathode-anode contact caused by the shrinkage of the insulating film at high temperature, thereby improving the safety performance of the cell. The invention is applied to the technical field of batteries.

The invention belongs to the technical field of sensors, and particularly relates to a Hall sensor which comprises a body; one side of the body is provided with a group of pins; one side, close to thepins, of the body is sleeved with a protective sleeve, the protective sleeve is hermetically connected with the body, and the protective sleeve is provided with an insulating sleeve at a position corresponding to the pins; the pins are aligned and inserted into the sleeve until the body is embedded into the protective sleeve and is in sealed connection with the protective sleeve; contact short circuit after the pins are bent is avoided through the insulating sleeves, normal work of the body is guaranteed, meanwhile, due to the fact that the sleeves have certain elasticity, excessive bending of the pins is hindered, cracking and even breaking of the pins at the roots of the pins after excessive bending are reduced, and normal work performance of the body is guaranteed.

The invention discloses an automatic assembly support of a lithium ion battery cell, which comprises a left frame, a middle frame, a right frame and a transverse frame, wherein the whole support is in an 'E' structure; and the middle frame comprises two sub-frames arranged in parallel. The support has the advantages that the support is simple in structure; a 'B' structure can be formed by connection via a bulge and a groove through mechanical equipment; a battery filling channel is provided; a short circuit caused by contact of anode and cathode tabs is prevented; when the automatic assembly support is used, labor participation can be effectively reduced in a production process; the influence of moisture on a battery is reduced; the electrochemical performance of the battery is improved; at the same time, with the adoption of the equipment, the production efficiency can be significantly improved; and economic benefits are increased.

This invention relates to a Li ionic secondary battery, a polymer carrier coating composed of a polymer and a flammable inhibitor is coated on the surface of a plate of the positive or negative, in which, the weight percentage of the flammable inhibitor in the polymer carrier coating is 1-7%, the polymer is 99-30% which has the advantages of anti-extrusion, good surcharge-proof and safety performances.

The invention provides a positive plate and a lithium ion battery. The invention provides a positive plate in the first aspect. The positive plate comprises a positive current collector, a first positive active layer and a second positive active layer, wherein the first positive active layer and the second positive active layer are sequentially stacked on at least one surface of the positive current collector; the thickness of the first positive electrode active layer is greater than or equal to 10% of the total thickness of the positive electrode active layer, the first positive electrode active layer comprises a non-active material, and the porosity of the first positive electrode active layer is smaller than that of the second positive electrode active layer. According to the lithium ion battery, the first positive active layer is filled with the non-active material, so that the chance of contact between the positive current collector and the negative active layer is reduced, contact short circuit of the lithium ion battery during abuse such as needling and extrusion is prevented, the safety of the lithium ion battery is improved, meanwhile, the second positive active layer is not changed, and the service life of the lithium ion battery is prolonged. And the energy density of the lithium ion battery is effectively considered.

The invention discloses an electric heating element supporting structure and a car waste gas purification device using the same. The electric heating element supporting structure comprises a plurality of supporting elements between a metal catalyst carrier and a heating core body, and the multiple supporting elements are evenly distributed along the heating core body at intervals. The supporting elements comprise insulation sleeve pipes inserted and fixed in the heating core body alternately in the forward and reverse directions and pins inserted and fixed in the insulation sleeve pipes in the forward direction. The car waste gas purification device is provided with an airtight shell which comprises a barrel-shaped middle section and a cone gradually shrinking from the front end and the rear end of the middle section to the outside, and an electric heating element and the metal catalyst carrier are sequentially arranged in the middle section of the shell in the waste gas flowing direction. In this way, the electric heating element supporting structure can be simply, conveniently and effectively supported between the electric heating element and the metal catalyst carrier carrying the heating element, the shape of the heating core body is effectively fixed, good supporting performance and insulation performance are achieved, the manufacturing cost is low, and the process is simple.

The invention discloses an integrated height-adjustable pipeline supporting device and an adjusting method. The supporting device comprises an upper hoop, a lower hoop, a fastener and a height-adjustable base; and the upper hoop and the lower hoop surround a pipeline and are fixedly connected through the fastener, and the lower hoop is fixedly connected with an external ship body through the height-adjustable base. According to the integrated height-adjustable pipeline supporting device and the adjusting method, the space occupation is small, the additional stress of the pipeline can be adaptively eliminated, and the supporting deformation state of the pipeline is improved.

The invention relates to a modular electric heating simulation heat source for ETG. The modular electric heating simulation heat source comprises at least two stacked modules. The module comprises a module box and an electric heating unit arranged in the module box. The electric heating unit is wrapped with a heat insulation layer. The electric heating unit comprises a cladding, a coil holding threaded pipe and a resistance wire spiral coil. The coil holding threaded pipe is mounted in the cladding. The resistance wire spiral coil is installed in the coil maintaining threaded pipe, and the coil maintaining threaded pipe is provided with internal threads matched with the resistance wire spiral coil. The beneficial effects of the heat souorce are as follows: the spiral coil simulates the radioactive source for heating, it is guaranteed that the heat flow path of the electric heating unit and the heat flow path of the radioactive source fuel pellet single body are basically the same, surface temperature distribution is basically consistent, overall temperature distribution is also basically consistent, a radioactive source is replaced to test and verify the performance of the generator, early-stage research cost is greatly reduced, and the research progress is accelerated.

The invention provides a metal lithium battery, which includes a battery cell, a positive pole tab and a negative pole tab. The cell includes: a positive pole piece, including a positive current collector and a positive active material layer disposed on the surface of the positive current collector; a negative pole piece, made of metal lithium thin film; and a separator, located between the positive pole piece and the negative pole piece ; Wherein, the positive electrode sheet, the separator, the negative electrode sheet are sequentially laminated, wound, or laminated and wound to form a battery core, and the sequentially laminated or wound positive electrode sheet, separator, and negative electrode sheet They are in close contact with each other without gaps. The positive tab is located on one side of the battery cell and is electrically connected to the positive current collector of the positive pole piece. The negative tab is located on one side of the battery cell, integrally formed by the negative pole piece and protruding from the negative pole piece. Wherein, the metal lithium battery further includes: an electronically insulating coating covering the side of the positive electrode tab where the negative electrode tab is located, so as to electrically insulate the negative electrode tab from the side of the positive electrode tab.

The invention discloses an electrical connector, which is characterized in that it comprises an insulating body, a base and a tongue plate extending forward from the base, at least one groove is provided on the side of the tongue plate; a shielding sheet is provided On the insulating body, the shielding sheet is provided with a plate body and at least one extension portion located on the side of the plate body, the plate body is disposed on the insulation body, the extension portion is disposed on the side of the tongue plate, and the extension portion includes a locking groove exposed in the groove. and a bent portion exposed on the tongue plate, the bent portion is located in front of the plate body, and is spaced from the plate body back and forth; a plurality of terminals are accommodated in the insulating body, and each terminal includes a head buried in the tongue plate, And in the front-to-back direction, each head is located between the bending part and the plate body. The bending part made of metal is wear-resistant and impact-resistant. The contact between the heads in the direction is short-circuited, avoiding the short-circuit caused by the contact of the heads with the shielding sheet, and ensuring high-frequency performance.

The invention discloses a chip signal testing device based on solder ball array packaging. The chip signal testing device comprises an adapter base, an adapter plate, an active probe and an oscilloscope, the bottom side of the adapter base is correspondingly connected with a bonding pad of a PCB where a chip is located and is used for lifting the bonding pad of the PCB. The bottom side of the adapter plate is connected with the top side of the adapter base through a solder ball, the bonding pad is arranged on the top side of the adapter plate, the bonding pad of the adapter plate comprises a connecting end used for being connected with a chip to be tested through the solder ball and a testing end connected with the connecting end, and the testing end is connected with the oscilloscope through the active probe. The invention also discloses a testing method. The testing method comprises the following steps: S01, extracting S parameters of a measurement channel where each test end of theadapter plate is located in advance; and S02, when the signal of the chip is measured, de-embedding the measurement channel according to the S parameters of the measurement channel to obtain a de-embedded waveform. The testing device and method have the advantages of being accurate and reliable in testing and the like.

The embodiment of the invention provides an electrolytic device and clothes treatment equipment. The electrolytic device comprises an electrolytic cathode and an electrolytic anode. The electrolytic cathode comprises a first supporting part and one or more first comb teeth extending from the first supporting part to the direction away from the first supporting part, the first comb teeth are arranged at intervals in the length direction of the first supporting part, the first comb teeth comprise first branch teeth and second branch teeth, and the first branch teeth and the second branch teeth are arranged at intervals in the thickness direction of the electrolytic cathode; and the electrolytic anode comprises a second supporting part and one or more second comb teeth extending from the second supporting part to the direction away from the second supporting part, the second comb teeth are arranged at intervals in the length direction of the second supporting part, the second comb teeth comprise third branch teeth and fourth branch teeth, and the third branch teeth and the fourth branch teeth are arranged at intervals in the thickness direction of the electrolytic anode. According tothe electrolytic device, floc is not prone to blocking the electrolytic device, and the service life of the electrolytic device can be prolonged; and the contact short circuit between the electrolyticcathode and the electrolytic anode can further be effectively prevented.

The invention discloses a powder off prevention battery grid suitable for a rolling brush process. The powder off prevention battery grid comprises a lug and grid bodies, wherein an active substance is coated on each grid body, a grid plane with lattices is arranged on the grid body, a bending edge is arranged around the grid plane, and a part where the bending edge and the grid plane are connected is bent. Lead powder is prevented from separating from the grid body by a bending structure during charging and discharging, thus, the lead powder is effectively prevented from being deposited at the bottom of a battery shell, the problem of pole plate short circuit caused by excessive deposition of the lead powder is avoided, the service lifetime of a storage battery is greatly prolonged, and the application safety of the storage battery is improved.