459 results about "Button battery" patented technology

The utility model provides a button cell. The button cell comprises a first shell, a second shell, a diaphragm and a second pole piece, the first shell comprises a conducting layer and an insulating layer, a first mounting groove is formed in the middle of the first shell, and the surface of the conducting layer is coated with an active material layer within the range of the first mounting groove; a second mounting groove is formed in the middle of the second shell; the edges of the first shell and the second shell are hermetically connected to form a mounting cavity, at least parts of the first tab and the second tab are exposed out of the mounting cavity, and the diaphragm and the second pole piece are arranged in the mounting cavity. The active material layer is arranged on the surface of the conductive layer of the first shell, so that the problems of non-uniform thickness of the pole piece and falling of the active material layer caused by rolling of the active material layer coated on the pole piece are avoided, the problem of large gram capacity fluctuation is avoided, the gram capacity is more stable, and the battery performance is effectively improved.

The utility model discloses a button cell which comprises a positive pole shell, the positive pole shell comprises a supporting part and a corner part connected to the outer side of the supporting part, the corner part comprises a first turning section and a second turning section, the second turning section is connected between the supporting part and the first turning section, the range of a first curvature radius R1 of the first turning section is 0.5-0.85 mm, and the range of a second curvature radius R1 of the second turning section is 0.5-0.85 mm. The second curvature radius R2 of the second turning section ranges from 0.1 mm to 0.5 mm; the negative electrode shell comprises a covering part and a bent buckling part, the covering part and the supporting part are oppositely arranged, the bent buckling part has a third curvature radius R3, the range of the third curvature radius R3 is 0.1-0.3 mm, and the area, provided with the third curvature radius R3, of the bent buckling part is oppositely arranged with the first turning section; and the sealing sleeve is clamped between the corner part and the bent buckling part so as to realize sealing between the positive pole shell and the negative pole shell. According to the button cell disclosed by the utility model, due to the parameter setting of the R1, the R2 and the R3, enough sealing performance is realized between the positive pole shell and the negative pole cover, and the condition of liquid leakage after high temperature is avoided.

The invention relates to the technical field of oil tank truck safety monitoring, in particular to an oil tank truck Iot intelligent lead sealing strip system which comprises a lock assembly and further comprises a steel wire rope detection circuit, a wireless communication module, an NFC encryption label and a power supply module. Each lock assembly comprises a main body shell, a lock shell, a lock cylinder, a spring and steel balls, the two lock assemblies are symmetrically arranged relative to the center line of the main body shell, and the three steel balls of the same structure are arranged on the lock cylinder in the radial direction of the lock cylinder; the steel wire rope detection circuit connects a steel wire rope to the circuit through a resistor, and detects the connection state of the steel wire rope in real time by detecting the voltage change on the steel wire rope; the wireless communication module comprises a master control MCU circuit integrated with a wireless transceiver and a wireless antenna, and is used for uploading the connection state information of the steel wire rope in real time; the NFC encryption tag has a repeated read-write function and can be encrypted; and the power supply module is a disposable button cell. According to the application, the safety of lead seal monitoring of the oil tank truck can be improved.

The invention relates to the field of organic polymer synthesis and new energy lithium batteries, in particular to a water-based adhesive, a preparation method of the water-based adhesive and application of the water-based adhesive to a lithium ion battery. The invention relates to a water-based adhesive which is obtained by reacting a polycarboxylic acid polymer with a compound containing an epoxy group. Carboxyl groups in polycarboxylic acid react with epoxy groups in epoxy alcohol through carboxylic acid-epoxy addition reaction, and the adhesive has high water solubility due to the fact that the adhesive contains carboxyl groups and hydroxyl groups; and the current trend that the negative electrode water-based adhesive replaces the oily adhesive is met. Through hydroxyl modified polycarboxylic acid, the flexibility of an adhesive film is improved, the electrochemical performance of a battery cell is greatly improved, the hydroxyl modified polycarboxylic acid type water-based adhesive is applied to a silicon negative electrode to assemble a button cell, and it can be found that the long cycle performance, the rate capability and the capacity retention ratio of the cell are greatly improved.

The application provides a button cell structure, a manufacturing method thereof and a button cell, wherein the button cell structure comprises a winding core formed by winding a laminated structure and having a hollow inner hole, the laminated structure comprises at least one positive electrode sheet, at least one negative electrode sheet and a separator separating the at least one positive electrode sheet and the at least one negative electrode sheet, and at least two ends of the winding core are provided with a separator bonding layer wrapping the winding core, which is used for fixing the positive electrode sheet and the negative electrode sheet. The application provides a button cell structure, a manufacturing method thereof and a button cell, which at least solve the technical problem that the positive electrode sheet and the negative electrode sheet are prone to shifting, avoid short circuit caused by the contact between the positive electrode sheet and the negative electrode sheet and the shell in the button cell, and improve the use safety of the button cell.

The invention provides a method for analyzing a main failure mechanism of a battery with an electrolyte leakage fault. The method comprises the following steps of: performing calendar aging, cyclic aging and reference performance test on a normal battery and a leakage battery; comparing the external characteristics of the normal battery and the leakage battery, and obtaining the difference between the leakage battery and the normal battery in the aspect of external characteristic performance; carrying out deep analysis on the dynamic degradation mechanism of the liquid leakage battery by utilizing an in-situ analysis means; obtaining a normal battery pole piece and a fault battery pole piece, and characterizing the battery pole pieces by using an electrochemical characterization means; battery regeneration is realized by using a battery pole piece, re-supplementing electrolyte and manufacturing a button battery; performance testing and aging testing are performed on the regenerated battery; the performance of the regenerated battery is evaluated; and a failure mechanism of the battery with liquid leakage is disclosed. And comparing the performance difference between the regenerative battery and the normal battery, and determining the irreversible influence of the fault on the battery. According to the invention, the main way of failure of the battery with liquid leakage and the irreversible influence of the liquid leakage fault on the battery can be revealed.

The invention provides a water-based composite electrolyte and a preparation method and application thereof. The water-based composite electrolyte comprises soluble zinc salt, amino acid hydrochloride additives and deionized water. The aqueous composite electrolyte can be used for a symmetrical button cell, a half cell or an aqueous zinc ion total cell. By adjusting zinc ion deposition on the surface of the zinc electrode, the growth of zinc dendrites is reduced, and the shuttle effect of the iodine positive electrode is inhibited, so that the coulombic efficiency and the cycle performance of the water-based zinc-iodine battery are improved. The additive disclosed by the invention can be adsorbed on the surface of a zinc negative electrode, delays the nucleation process and inhibits the growth of zinc dendrites; the form of hydrochloride can play a role of a buffer solution, stabilize the pH value of the electrolyte, inhibit the corrosion of the zinc negative electrode and reduce the hydrogen evolution reaction; the hydrochloride form can weaken the protonation effect of amino acid groups and enhance the electrostatic interaction between the amino acid groups and the polyiodide, so that the shuttle effect is inhibited, and the coulombic efficiency and the cycle performance of the aqueous zinc-iodine battery are improved.

A mechanism for controlling light in a rotating mode comprises an installation base, the center of the installation base is provided with a round battery groove for a button battery to be arranged in, and the central axis of the battery groove is recorded as a first axis; the central axis of the annular rotating main body is the first axis, and the rotating main body is arranged on the periphery of the battery groove in a circumferential rotating mode; a gear ring which is arranged along the circumferential direction and can rotate along with the rotating main body is arranged on the circumferential wall of the rotating main body; the circuit board is used for being electrically connected with the lamp, is fixed relative to the mounting seat and is provided with a toggle switch arranged corresponding to the gear ring, and the toggle switch is positioned on a rotating path of each tooth of the gear ring and is arranged to be capable of being scanned by each tooth in sequence along with the rotation of the gear ring so as to record the scanning direction and / or frequency of the teeth. According to the utility model, the arrangement of the circular battery jar is beneficial to alignment between the central axis of the rotating main body and the rotating axis, so that the rotating main body rotates more smoothly, and the gear ring on the rotating main body can be matched with the toggle switch more accurately.

The utility model discloses a high-strength anti-theft padlock and key combination, which comprises a padlock and a key, the key comprises a key handle and a key head, the key handle is provided with a battery jar and a protective cover, a button battery is installed in the battery jar, the button battery is electrically connected with an electromagnet, the key head is provided with a groove, a contact switch is arranged in the groove, and the contact switch is electrically connected with the electromagnet. The control module is used for controlling electromagnet energization; the padlock comprises a lock body, a lock beam and a lock cylinder. A lock tongue is arranged above the lock cylinder; a sliding groove A is eccentrically formed in the top face of the lock cylinder, and the sliding groove A and the groove are complementary in shape. A sliding groove B matched with the sliding groove A is formed in the bottom face of the spring bolt. A magnetic block is arranged in the sliding groove A. A sliding groove C is formed in the contact position of the bottom face of the spring bolt and the inner wall of the lock body, a sliding groove D matched with the sliding groove C is formed in the inner wall of the lock body, and a positioning pin is arranged in the sliding groove D. The anti-theft padlock has the advantages that the anti-theft function of the padlock is enhanced, and the maintenance cost is low.

The utility model discloses a disposable dental handpiece quick-connection electric connector, which comprises an adapter block, a terminal and an adapter seat, the adapter block is provided with a plurality of plugging holes and an electric mounting hole, and the plurality of plugging holes are used for plugging an air inlet pipe, a water inlet pipe and an atomizing pipe of a dental handpiece; the terminals are inserted into the electric mounting holes; the adapter seat is provided with an inserting groove for inserting a dental handpiece handle, the bottom of the inserting groove is provided with an air inlet groove, a water inlet groove, an atomizing groove and an electric inserting groove, the terminal is inserted into the electric inserting groove, and the adapter block is clamped at the bottom of the inserting groove. When the disposable dental handpiece is used, the terminal is inserted into the adapter block, then the adapter block is sleeved at the connecting end of the disposable dental handpiece, the adapter seat is inserted into the connecting end of the disposable dental handpiece, external electricity is conducted to a handpiece handle of the disposable dental handpiece, and the disposable dental handpiece does not need to be provided with a button battery.

The application provides a preparation method of a high-capacity button cell, and particularly relates to the technical field of button cells. The preparation method uses artificial graphite, etched graphene, electrolytic manganese dioxide and a binder as preparation materials of a positive plate, assembles after the positive plate is prepared, injects electrolyte, seals, and pre-discharges to obtain the high-capacity button cell. The high-capacity button cell has high discharge capacity and can release more electric energy in unit volume, and greatly promotes the power supply capacity. The etched graphene is prepared by the following method: mixing graphene, a strong alkali solution and an ethanol solution, then performing ultrasonic treatment, spray drying, first-stage temperature etching, second-stage temperature etching, cooling, washing with deionized water until neutral, and drying.

This utility model relates to the field of battery packaging technology and discloses an automatic labeling device for button battery packaging, including a conveyor frame, two side plates, and a drive mechanism. The side plates are fixedly connected to the lower ends of the conveyor frame. The drive mechanism includes multiple conveyor rollers, a protective shell, and two hand-operated expansion shafts. The front and rear ends of the conveyor rollers are rotatably connected to the inner walls of the front and rear ends of the conveyor frame. A moving mechanism is provided at the upper end of the conveyor frame. The moving mechanism includes a moving plate, two guide rods, and a moving threaded rod. The front and rear ends of the guide rods are fixedly connected to the side plates. In this utility model, the moving threaded rod in the moving mechanism is threadedly connected to the moving plate, causing the moving plate to move along the guide rods, facilitating changes in the label pasting position. A return spring in the adjusting mechanism applies elastic force to the adjusting block, which, in conjunction with the adjusting threaded rod, drives the pressure plate to change the magnitude of the elastic force applied by the return spring, facilitating adjustments to the tension of the label tape.

This invention provides a coin cell battery and its manufacturing method. The method includes providing a first housing, the first housing including a conductive layer and an insulating layer, a first mounting groove in the middle of the first housing, a through hole in the insulating layer within the first mounting groove, and a conductive layer exposed outside the insulating layer through the through hole. An active material layer is coated on the surface of the conductive layer. A second electrode is inserted into a second mounting groove of a second housing, and a separator is placed inside. The edges of the first housing and the second housing are sealed, and the first mounting groove and the second mounting groove are sealed to form a mounting cavity, thus obtaining a coin cell battery. By pre-coating the active material layer onto the surface of the conductive layer of the first housing, the problems of uneven electrode thickness and active material layer detachment caused by rolling the active material layer onto the electrode are avoided, resulting in a more stable specific capacity and effectively improving battery performance.

The invention relates to the technical field of button battery production, and particularly discloses an automatic button battery combining machine which comprises a combining mechanism, a positioning mechanism, a negative electrode conveying mechanism, a positive electrode conveying mechanism and a pressurizing mechanism. A first positioning notch is formed in a negative plate limiting groove formed in the adsorption plate, a second positioning notch is formed in a positive plate limiting block arranged on the jacking seat, positioning blocks at the two ends of the positioning mechanism can abut against the two ends of the negative plate and the two ends of the positive plate, and positioning blocks on the side face of the positioning mechanism can abut against one side of the negative plate and one side of the positive plate. The negative electrode conveying mechanism is used for conveying a negative electrode plate into the negative electrode plate limiting groove, the positive electrode conveying mechanism is used for conveying a positive electrode plate to the jacking seat, and the pressurizing mechanism is used for pressing a positive electrode and a negative electrode on the positive electrode plate. According to the automatic button cell combination machine, the assembly precision of button cells can be improved, and the yield of products is increased.

This invention relates to the field of battery packaging technology, and in particular to an automatic loading and unloading button cell battery packaging device, which includes a frame, a loading tray, a unloading tray, a loading and unloading device, and a battery sealing device. The loading tray is provided with multiple material-carrying sections arranged in an array. The unloading tray is provided with multiple unloading slots. The battery sealing device includes a sealing mold and a liquid injection mechanism. The liquid injection mechanism includes a liquid injection component and a liquid injection pump body. The liquid injection pump body is mounted on the frame, and the liquid injection component is mounted on one side of the lower mold to move up and down with the lower mold. This invention forms a closed-loop process of "loading-processing-unloading", realizing the orderly flow of materials, avoiding frequent manual intervention, improving production continuity, and helping to improve production efficiency. The precise matching of the row of suction nozzles with the array of material-carrying sections ensures the consistency of material position during the transfer process. It reduces the load on the lower mold, making the movement lighter and reducing the length and wear of the follow-up pipeline.

The application discloses a kind of diaphragm ion resistivity test methods, comprising the following steps: two pieces of same size foil, diaphragm to be measured and target electrolyte are made into only one layer diaphragm button cell;Pre-tightening force is applied to the prepared button cell;Linear sweep voltammetry in electrochemical workstation is used to test the linear voltammogram of button cell;According to the ion resistance and layer number curve diagram of different layer number diaphragm button cell, the calculation method of diaphragm ion resistivity is: ρ=k×S÷d, wherein the slope k is the ion resistance of the diaphragm, S is aluminum foil area, and d is diaphragm thickness;Through the test method of the application, it is not necessary to test the meaningless diaphragm electronic resistance in lithium battery, but directly test diaphragm ion resistivity, and the method is more accurate and can meet actual demand.

The utility model discloses a pole piece feeding mechanism. The pole piece feeding mechanism comprises a rack, an electrode vibration disc, a temporary storage frame, a transfer table, a pole piece lifting device, a pole piece turn-over device, an X-axis moving module, a Z-axis moving module, a transfer plate, an elastic buffering assembly, a fixed transfer air tap, a rotary air tap assembly and a push rotating support arm. When the electrode plate is turned over in the vibration process, the inverted electrode plate is firstly adsorbed and placed on the transfer table through cooperation of the X-axis moving module, the Z-axis moving module and the fixed transfer air nozzle, and the electrode plate lifting device lifts the inverted electrode plate to a station of the electrode plate turning-over device; when a button cell is welded, the reversed electrode plate is clamped and overturned by 180 degrees by the electrode plate overturning device, then is placed on the transfer table, and is adsorbed and placed on the welding surface of the button cell by the rotary air tap assembly, so that the problem of wrong welding caused by overturning of the electrode plate in the prior art is effectively solved, the qualified rate of products is effectively improved, and the quality of the products is ensured.

The application provides a test circuit and a test method for a server button cell, which can be applied to the technical field of battery detection. The test circuit for the server button cell comprises: a current-limiting resistor, which is electrically connected between the button cell and a configuration information maintaining component in the server; a switching device, which is electrically connected between a server power supply and the current-limiting resistor; and a controller, which has sampling terminals, the sampling terminals are respectively electrically connected to two ends of the current-limiting resistor, and the controller is used for performing fault testing on the button cell by sending a first control signal to the switching device to turn on the switching device, making the server power supply be applied to the button cell through the current-limiting resistor, and collecting a voltage difference between the two ends of the current-limiting resistor.

The invention discloses a lithium-manganese button cell full-parameter automatic detection system and method, and belongs to the technical field of battery production detection. The system comprises a detection assembly line, a battery performance detection part, a control system and an intelligent sorting and tray supplementing system. According to the invention, through dynamic load switching, multi-channel parallel processing and high-frequency alternating current injection technologies, synchronous and rapid measurement of four key parameters of battery open-circuit voltage, load voltage, short-circuit current and internal resistance is realized for the first time. On the basis, the system automatically sorts unqualified products according to detection results, vacant positions are filled in real time through the vacancy filling mechanical arm, and the full-closed-loop automatic process of detection, sorting and tray filling is formed. According to the method, the capacity of a single shift is improved from 120,000 to 18,000, the omission ratio of defective products is reduced to 0.01% or below, and the industrial problems that traditional equipment is single in function, low in efficiency and dependent on manpower are thoroughly solved.

The application provides a button cell and an electronic device. The button cell comprises a first shell, a second shell, an electrode assembly and a first layer. The electrode assembly comprises a winding body and a first metal plate. The winding body comprises a first pole piece, and the first pole piece comprises a first current collector. The first metal plate is connected with the first current collector and extends out of the first current collector along a first direction. The part where the first metal plate is connected with the first current collector is a first part. The first layer is connected with the first metal plate and covers the first part. Along a winding direction, the first layer comprises a first side edge and a second side edge. The first side edge intersects with the first current collector at a first end point, and the second side edge intersects with the first current collector at a second end point. When viewed from the first direction, a line connecting the first end point and a winding central axis of the winding body is defined as a first virtual line, a line connecting the second end point and the winding central axis is defined as a second virtual line, and the included angle between the first virtual line and the second virtual line is 54°-66°.

1. Name of the product in this design: Battery Detector. 2. Purpose of this design: To test the charge of various types of button batteries. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view. 5. Other situations requiring explanation: The display screen in the usage status diagram shows the battery level.

The utility model relates to the technical field of tire pressure monitoring, and discloses a tire pressure monitoring sensor circuit system and equipment based on an NXP control chip. The tire pressure monitoring sensor circuit system comprises a control chip used for processing sensor data and controlling a communication function; the power supply module comprises a button battery and a power supply filter circuit, and the button battery provides 3.0 V working voltage and supplies power to the whole system through a VBAT node; the power supply filter circuit comprises a plurality of filter capacitors C12, C13 and C14 which are connected in parallel, one ends of the filter capacitors C12, C13 and C14 are connected with a VBAT node, and the other ends of the filter capacitors C12, C13 and C14 are grounded. According to the utility model, a plurality of functional modules such as the microprocessor, the radio frequency transceiver, the sensor interface and the power management module are integrated in a single control chip system through high integration, so that the circuit volume and the number of elements are obviously reduced, and the reliability and the stability of the system are improved.

The application provides a negative electrode material testing method, which comprises the following steps: providing a current collector, the current collector has a first direction and a second direction, the elongation of the first direction of the current collector is greater than that of the second direction, and the included angle between the first direction and the second direction is 80-100 degrees; coating a slurry containing a negative electrode material on at least one surface of the current collector along the first direction, and drying to obtain a pole piece, the surface of the pole piece is provided with an active material layer containing the negative electrode material; rolling the pole piece along the second direction, and selecting a plurality of pole piece samples on the pole piece; assembling the pole piece samples into button cells for electrochemical parameter testing, obtaining electrochemical parameters of the pole piece samples, and the electrochemical parameters include specific capacity. The negative electrode material testing method can improve the accuracy, repeatability and reproducibility of the electrochemical parameters obtained by button cell testing, and can improve the accuracy of the test results of the specific capacity.

The utility model relates to the technical field of anti-counterfeiting, in particular to an anti-counterfeiting system with a dynamically changeable URL (Uniform Resource Locator) link, which is characterized in that a transparent plastic waterproof film is fixedly arranged on the inner side of the top of an outer nesting sleeve, a mounting component is arranged on the inner side of the outer nesting sleeve, a limiting groove is fixedly formed in the inner side of the outer nesting sleeve, and the mounting component is fixedly connected with the limiting groove. The inner side of the mounting groove is used for mounting an anti-counterfeiting mark, the arrangement of the transparent plastic waterproof film plays a waterproof role on the anti-counterfeiting mark, when a product is upgraded and the anti-counterfeiting mark needs to be updated, the first synchronous belt wheel can be pushed to enable the second synchronous belt to slide outwards along the first L-shaped sliding frame and the second L-shaped sliding frame, and then the second synchronous belt wheel is pushed to slide outwards along the first L-shaped sliding frame and the second L-shaped sliding frame. The first synchronous belt wheel can be pushed to drive the mounting groove to slide outwards, the anti-counterfeiting mark in the mounting groove can be conveniently updated, after updating, the first synchronous belt wheel can be pushed again, the mounting groove is reset, the button battery can supply power to the LED lamp, and the anti-counterfeiting mark in the mounting groove can be conveniently scanned through the transparent plastic waterproof film.

To provide a lithium primary button type battery having excellent discharge performance, good stability and reliability, its manufacturing method, and an electronic apparatus.SOLUTION: A lithium primary button battery comprises a battery case and a battery core module located inside the battery case, the battery core module comprises a negative electrode (3), a negative electrode modification membrane (4), a separator (5, 6) and a positive electrode (7) which are sequentially stacked, a surface of the negative electrode (3) close to the negative electrode modification membrane (4) is provided with a concave groove (9), and the negative electrode modification membrane (4) is tightly embedded in the concave groove (9).SELECTED DRAWING: Figure 2

The invention provides a wide-temperature-range electrochemical in-situ X-ray absorption spectrum testing device which comprises a heat conduction table, a plurality of temperature control surfaces are arranged on a main body of the heat conduction table, and the plurality of temperature control surfaces are adjacent to each other to form a polygonal enclosed structure; the heat conduction table main body is further provided with a temperature controlled surface, the temperature controlled surface is arranged on one side of the polygonal enclosure structure, and through the design that the plurality of temperature control surfaces of the heat conduction table are of the polygonal enclosure structure and refrigeration and heating are carried out through the temperature control assembly, rapid and accurate wide-temperature-range temperature control on the test groove of the temperature controlled surface is realized; and the test groove is used as a battery carrying platform and is matched with the battery clamp to realize quick replacement of the button battery, so that the test efficiency is greatly improved.

To provide a button type battery capable of improving stability of an internal structure of the battery, a method of assembling the same, and a method of manufacturing a pad.SOLUTION: The present invention provides a button battery and an assembly method thereof, and a preparation method of a spacer, wherein the button battery comprises a positive electrode cover assembly comprising a positive electrode cover and a spacer, a positive electrode current collector and a positive electrode plate, wherein the spacer comprises a spacer portion and an elastic plate portion which are arranged in a staggered manner, and one or both of the elastic plate portion and the spacer portion are provided with a protrusion structure which passes through a through hole of the positive electrode current collector and is fixed to the positive electrode plate.SELECTED DRAWING: Figure 2

This invention relates to the field of manufacturing equipment for cutting irregularly shaped electrode sheet button cell winding, and particularly to a button-type swing arm feeding mechanism, including a support plate, with guide rails symmetrically arranged on one side of the support plate, and a sliding plate with an L-shaped cross section slidably arranged between the guide rails. A swing mechanism is arranged on one side of the sliding plate. According to the actual size of the electrode sheet, the main cylinder can be installed and fixed in the corresponding mounting groove by fixing bolts. Then, the spacing between the horizontal plate, the first mounting plate and the second mounting plate can be adjusted by the adjusting component, so that the adsorption component can more accurately adsorb the electrode sheet surface and can also adsorb and transport irregularly shaped electrode sheets.

The utility model discloses a can replace fish float of tail light, including middle shell, the inner bottom wall fixedly connected with the lamp stand of middle shell, the inner wall fixedly connected with button cell of lamp stand, the top fixedly connected with the light source of lamp stand, the inner bottom wall fixedly connected with the cylindrical seat of middle shell, the inner wall fixedly connected with first magnet piece of cylindrical seat, the outer surface fixedly connected with the clamping point of cylindrical seat, the inner top wall fixedly connected with second magnet piece of lamp stand, the inner wall of lamp stand is seted up and has the lock catch groove, this can replace fish float of tail light, when replacing whole lamp stand, rotates the lamp stand, rotates along the lock catch groove, rotates the clamping point to the lock catch groove export place, then lifts the lamp stand and makes first magnet piece and second magnet piece separate, can take down whole lamp stand to when tail light appears damage, and fisherman does not need to replace whole fish float, only needs to replace tail light damage part, avoids causing resource waste, reduces use cost.

The invention discloses a positive electrode active material, an electrochemical device and electric equipment, and belongs to the technical field of electrochemical energy storage devices. A button cell is assembled by a positive plate containing the positive electrode active material and a negative plate of lithium metal, the button cell is charged and discharged for 100 cycles at the current multiplying power of 0.5 C and the upper and lower limit voltage of 2.8-4.4 V, the peak position change value of the 003 diffraction peak of the positive electrode active material in the cycle charging state of 100 cycles is small, and the peak position change value of the 003 diffraction peak of the positive electrode active material is small. The positive electrode active material has excellent particle strength and crystal structure stability, lithium ion transmission is facilitated, and the cycle performance of the positive electrode active material is improved.