Professional pulse mercury-free silver oxide button cell and preparation method thereof

Abstract

The invention discloses a professional pulse mercury-free silver oxide button cell and a preparation method thereof.The professional pulse mercury-free silver oxide button cell comprises a positive plate, a PVC film, a positive electrode shell, a positive electrode material, a diaphragm, a negative electrode material, an insulating rubber ring, a negative electrode cover and a negative plate which are sequentially arranged from outside to inside, the positive plate is arranged outside the positive electrode shell, the positive electrode material is arranged in the positive electrode shell, and the negative electrode material is arranged in the negative electrode cover; a positive electrode material is arranged in the positive electrode shell, a negative electrode material is arranged in the negative electrode cover, an insulating rubber ring is arranged between the positive electrode shell and the negative electrode cover, a diaphragm is arranged between the positive electrode material and the negative electrode material, the negative electrode cover is provided with a reverse edge, and an opening end of the positive electrode shell forms an R position and is in contact connection with the insulating rubber ring and the reverse edge of the negative electrode cover. Carboxymethyl cellulose and sodium polyacrylate are added into the negative electrode material of the battery, so that the liquid holding capacity and moisture retention of the negative electrode material can be effectively improved; according to the professional pulse mercury-free silver oxide button cell, heavy metal elements such as mercury and lead are not added, and the problem of environmental pollution caused by heavy metal can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of button batteries, and specifically to a professional pulsed mercury-free silver oxide button battery and a preparation method thereof. Background Art

[0002] Silver oxide button batteries are mainly applied to appliances with low current discharge, such as watches, calculators, vernier calipers, and laser flashlights, etc., and mainly include a positive electrode active material, a positive electrode housing, an isolation rubber ring, a negative electrode active material, a negative electrode cover body, and a diaphragm structure.

[0003] With the development of technology level, some high-tech products and precision instruments with better performance have emerged one after another, such as cardiac pacemakers, medical imaging devices, blood glucose monitors, respirators and anesthetic machines, portable diagnostic devices, wearable wireless communication devices: such as wireless earphones, smart watches, etc. The requirements for batteries by these high-tech products and precision instruments are:

[0004] High instantaneous current output: It can provide a high current pulse support of up to 10 mA or even higher in a short time, which is very important for devices that need to be quickly started, such as camera flashes and certain medical devices.

[0005] Stable voltage output: It can maintain a stable voltage during the discharge process, which is crucial for the performance of precision instruments.

[0006] Excellent energy density: Compared with other types of batteries, this battery can store more energy while being miniaturized, and is suitable for use in small devices.

[0007] High temperature and low temperature resistance performance: It can still maintain good performance under extreme temperatures, making it suitable for various environmental conditions.

[0008] Environmental friendliness: It has more environmental advantages in use and disposal compared with some other types of batteries.

[0009] The existing silver oxide button batteries have the following problems: the high instantaneous current output performance is not prominent. For example, when the SR716 button battery is applied to a blood glucose monitor, the high instantaneous current (10 mA) output performance is low, and the situation of being lower than the specification value occurs. The reason is that the energy density of the existing silver oxide button batteries is not high, and there is no more optimized design to support high pulse performance, so that a large amount of electric energy can be released in a short time to ensure that the battery will not be quickly depleted when a large amount of current is instantaneously released. There are also the following problems in the process: 1. Although the positive electrode powder particles have been pelletized by tableting, the ratio of the active substance to the conductive substance in the positive electrode body does not form the best combination. The specific surface area and porosity of the pelletized positive electrode powder particles are not large enough, and the number of available flow channels of the electrolyte inside the positive electrode body is not large enough and the distribution is uneven, which hinders the instantaneous transfer of the electrolyte in the positive electrode body. In addition, the liquid holding capacity of the negative electrode body (zinc paste) is insufficient, thereby increasing the internal resistance of the battery, which is an important factor affecting the battery discharge performance.

[0010] Therefore, there is an urgent need to design a new technical solution to solve the problems existing in the prior art and enable the product to achieve the performance of professional pulse discharge. Summary of the Invention

[0011] The object of the present invention is to provide a professional pulse mercury-free silver oxide button battery and a preparation method thereof. The battery can effectively solve the problems of low high instantaneous current (10 mA) output performance of the button battery dedicated to high-tech products and precision instruments, low liquid holding capacity and fluidity of the negative electrode body, and environmental pollution caused by heavy metals contained therein.

[0012] The object of the present invention is to provide a professional pulse mercury-free silver oxide button battery, which includes a positive electrode sheet, a PVC film, a positive electrode shell, a positive electrode material, a separator, a negative electrode material, an insulating rubber ring and a negative electrode cover, and a negative electrode sheet arranged in sequence from outside to inside. The positive electrode sheet is arranged outside the positive electrode shell, the positive electrode material is arranged inside the positive electrode shell, the negative electrode material is arranged inside the negative electrode cover, an insulating rubber ring is arranged between the positive electrode shell and the negative electrode cover, a separator is arranged between the positive electrode material and the negative electrode material, the negative electrode cover is provided with a flange, and the open end of the positive electrode shell forms an R position and is in contact connection with the insulating rubber ring and the flange of the negative electrode cover.

[0013] Preferably, the number of layers of the separator is two. The two layers of separators include a layer of grafted film and a layer of glass paper. The layer of grafted film is in contact with the positive electrode material, and the layer of glass paper is in contact with the negative electrode material.

[0014] Preferably, the number of layers of the separator is three. The three layers of separators include a layer of grafted film, a layer of glass paper and a layer of grafted film. The layer of grafted film is in contact with the positive electrode material, and the other layer of grafted film is in contact with the negative electrode material.

[0015] Preferably, the positive electrode material comprises the following raw materials by weight: 85-90 parts of silver oxide; 0-3 parts of electrolytic manganese dioxide; 2-5 parts of graphite; 0.14-0.22 parts of polyacrylic acid; 2-4 parts of potassium hydroxide, and 4-7 parts of deionized water.

[0016] Preferably, the negative electrode material comprises the following raw materials by weight: 64-69 parts of zinc powder; 0.5-1.7 parts of carboxymethyl cellulose; 0.3-1.0 parts of sodium polyacrylate; 1.4-2.0 parts of zinc oxide; 0.01-0.05 parts of indium hydroxide; 11-16 parts of potassium hydroxide; 15-20 parts of deionized water; wherein 0.50-1.5 parts of carboxymethyl cellulose is used for mixing zinc powder, 0.06-0.12 parts is used for preparing the negative electrode liquid, and the weight ratio of carboxymethyl cellulose to sodium polyacrylate in the negative electrode material is 1:1.

[0017] Preferably, the negative electrode cover is made of a composite metal material, including one of a nickel layer, a stainless steel layer, a copper layer, and a tin layer, a tin alloy layer, an indium layer, and an indium alloy layer arranged in sequence from outside to inside; the thickness of the nickel layer is 10-30 μm, the thickness of the copper layer is 30-50 μm, and the thickness of the tin layer or tin alloy layer or indium layer or indium alloy layer is 0.1-2 μm; the nickel layer, the stainless steel layer, and the copper layer are hot-melted at high temperature or electroplated or electrolessly plated, and the tin layer or tin alloy layer or indium layer or indium alloy layer is electroplated or electrolessly plated.

[0018] Preferably, the silver oxide content ≥ 99.9%, the loss on drying ≤ 0.2%, the nitric acid-insoluble matter ≤ 0.02%, the hydrochloric acid-insoluble precipitate ≤ 0.04%, the free alkali ≤ 0.012%, the nitrate ≤ 0.005, the particle size distribution: below 200 mesh is 30% or less, 50-200 mesh is 70% or more, and the titration of the nitric acid solution is clear and transparent; the graphite is fine powder mixed graphite, containing 50% expanded graphite, its moisture content ≤ 0.2%, ash content ≤ 0.15%, carbon content ≥ 99.85%, loose bulk density > 0.06 g / cm 3 , specific surface area 10-20 m 2 / g, particle size D50: 10 - 18 μm, trace metals: aluminum ≤ 100 ppm, calcium ≤ 200 ppm, iron ≤ 75 ppm, silicon ≤ 450 ppm; the alkaline viscosity (0.5%, 25 °C) of the polyacrylic acid is 6000 - 14000 mPa·s, and the pH value (0.5%, 25 °C) is 7.0 - 9.0. The pH value of the sodium polyacrylate is 6.8 - 8.5, the drying weight loss < 9.5%, the apparent density is 0.6 - 0.8 g / ml, the water absorption rate of deionized water > 260 g / g, the viscosity is 45000 - 95000 mPa·s, the iron content < 30 ppm, the proportion of particle size below 106 μm > 98%, the proportion of particle size below 53 μm > 80%, and the average particle size > 20 - 50 μm. The alkaline viscosity (1%, 25 °C) of the carboxymethyl cellulose is 1000 - 5000 mPa·s, the pH value (1%, 25 °C) is 6.0 - 8.0, and the purity > 99%; the pure potassium hydroxide content of the potassium hydroxide > 90%, the potassium carbonate content < 1.0%, the gas generation rate < 0.05 ml / g·day, the Cl content < 0.01%, the iron content < 5 mg / kg, and the lead content < 10 mg / kg.

[0019] Preferably, the particle size distribution range of the zinc powder is as follows: the proportion of particle size greater than 50 mesh is 0%, the proportion of particle size 50 mesh to 100 mesh is 25 - 45%, the proportion of particle size 100 mesh to 140 mesh is 25 - 40%, the proportion of particle size 140 mesh to 200 mesh is 25 - 40%, and the proportion of particle size less than 200 mesh is 0%; the zinc content of the zinc powder is greater than 99.5%, the indium content is 150 - 250 ppm, the bismuth content is 100 - 200 ppm, the aluminum content is 50 - 100 ppm, the lead content is ≤ 30 ppm, the cadmium content is ≤ 10 ppm, and the mercury content is ≤ 1 ppm; the iron content is ≤ 3 ppm, the zinc oxide content is ≤ 0.3%, and the loose bulk density of the zinc powder is 2.90 ± 0.30 g / ml; the gas evolution rate of the zinc powder < 15 μl / g·d at 45 °C; the purity of the zinc oxide is > 99.7%, the lead oxide content is ≤ 0.008%, the manganese oxide content is ≤ 0.0001%, the copper oxide ≤ 0.0002%, the hydrochloric acid insoluble matter ≤ 0.006%, the water soluble matter ≤ 0.10%, the volatile matter at 105 °C ≤ 0.30%, the ignition loss ≤ 0.20%, the sieve residue (45 μm test sieve) ≤ 0.1%, no metal matter (calculated as Zn), the iron content ≤ 0.0050%, and the cadmium content ≤ 0.0020%; the purity of the indium hydroxide is > 99.9, and the contents of its impurities (Cd, Fe, Ni, Cu, Pb, Sn, Al, As, Ti, Sb) are all < 5 ppm.

[0020] The present invention also provides a preparation method of a professional pulse mercury-free silver oxide button battery, comprising the following steps:

[0021] S1. Preparation of the positive electrode material:

[0022] a1. Mix polyacrylic acid with silver oxide and stir for 10 minutes;

[0023] b1. Add graphite, the polyacrylic acid treated in step a1, and silver oxide into a container in sequence, and stir at a rotation speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an ambient temperature of 15 - 30°C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0024] c1. Press the positive electrode powder into a cake with a press to obtain the positive electrode cake;

[0025] d1. Add potassium hydroxide to deionized water and stir until the materials are dissolved;

[0026] e1. After the solution in step d1 cools, adjust the specific gravity to 1.24 - 1.30 g / ml at 25°C to obtain the positive electrode liquid;

[0027] f1. Inject the positive electrode liquid obtained in step h1 into the positive electrode cake to obtain the positive electrode material.

[0028] S2. Preparation of the negative electrode material:

[0029] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly;

[0030] b2. Then add potassium hydroxide to step a2 and stir until the materials are dissolved and let it stand for 4 - 5 hours;

[0031] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it is completely dissolved.

[0032] d2. After the solution in step c2 cools, adjust the specific gravity to 1.41 - 1.47 g / ml at 25°C to obtain the negative electrode liquid;

[0033] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material;

[0034] S3. Preparation of the professional pulse mercury - free silver oxide button battery: Then install the positive electrode cake into the positive electrode shell, inject the positive electrode liquid onto the positive electrode cake. After the positive electrode liquid is absorbed, install the separator onto the positive electrode cake. At the same time, install the negative electrode material into the combination of the negative electrode cover and the insulating rubber ring, inject the negative electrode liquid onto the mixed zinc powder, install the combination of the negative electrode cover and the insulating rubber ring, and then seal it. Put the PVC film over the battery and make the PVC film shrink through hot air. Finally, laser - weld the positive and negative electrode sheets on the positive electrode shell and the negative electrode cover of the battery respectively.

[0035] Preferably, an epoxy resin type pouring adhesive is applied to the gap between the negative electrode cover and the insulating rubber ring, and an epoxy resin type pouring adhesive is applied to the gap between the positive electrode shell and the insulating rubber ring.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows: The positive electrode material of the battery uses granulated silver oxide powder. The silver oxide powder is granular, and the silver oxide particles show an approximate honeycomb shape under a microscope. The granulated silver oxide has a large specific surface area, a high porosity, and a uniform pore distribution; and fine powder mixed graphite is used. The fine powder mixed graphite has a large specific surface area and a high consistency in particle size distribution. And polyacrylic acid has good water absorption. Therefore, after the positive electrode powder is pressed into a positive electrode cake, it is beneficial to the transmission of the electrolyte in the positive electrode body, has good conductivity, and the usable finished product rate of the positive electrode powder can reach more than 90%; and a nickel-stainless steel-copper composite sheet negative electrode cover is plated with tin or indium on the outside, and indium element and zinc oxide are added to the negative electrode material to inhibit the generation of hydrogen with elements having a high hydrogen evolution overpotential, and the hydrogen absorption performance of the positive electrode active material silver oxide itself is used to inhibit the gas generation inside the battery to obtain better leakage resistance performance under high temperature and high humidity storage. In addition, carboxymethyl cellulose and sodium polyacrylate are added to the negative electrode material of the battery, which can effectively improve the liquid holding capacity and moisture retention of the negative electrode material; finally, mercury, lead and other heavy metal elements are not added to the professional pulse mercury-free silver oxide button battery of the present invention, which can effectively avoid the pollution problem of heavy metals to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a sectional view of the professional pulse mercury-free silver oxide button battery of the present invention;

[0038] Figure 2 is a sectional view of the insulating rubber ring of the present invention;

[0039] Figure 3 is one of the button battery structure diagrams of the present invention;

[0040] Figure 4 is another button battery structure diagram of the present invention;

[0041] Figure 5 is the third button battery structure diagram of the present invention;

[0042] Figure 6 is the fourth button battery structure diagram of the present invention;

[0043] Figure 7 is the silver oxide morphology diagram of the present invention.

[0044] In the figure: 1. Negative electrode cover; 11. Reverse edge; 2. Negative electrode material; 3. Insulating rubber ring; 4. Diaphragm; 5. Positive electrode material; 6. Positive electrode shell; 7. Positive electrode sheet; 8. Negative electrode sheet; 9. PVC film. DETAILED DESCRIPTION OF THE INVENTION

[0045] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] The technical solution adopted by the present invention is as Figure 1 、 2 shown. A professional pulsed mercury-free silver oxide button battery includes a positive electrode sheet 7, a PVC film 9, a positive electrode case 6, a positive electrode material 5, a separator 4, a negative electrode material 2, an insulating rubber ring 3, and a negative electrode cover 1 and a negative electrode sheet 8 arranged in sequence from outside to inside. The positive electrode material 5 is arranged inside the positive electrode case 6. A positive electrode cake 5 and a positive electrode liquid are provided inside the positive electrode material. The negative electrode cover 1 is provided with a negative electrode material 2; a mixed zinc powder and a negative electrode liquid are provided inside the negative electrode material. An insulating rubber ring 3 is arranged between the positive electrode case 6 and the negative electrode cover 1. A separator 4 is arranged between the positive electrode material 5 and the negative electrode material 2. The number of layers of the separator is two or three. The two-layer separator includes a grafted film and a piece of glass paper. One grafted film contacts the positive electrode material, and one piece of glass paper contacts the negative electrode material; the three-layer separator includes a grafted film, a piece of glass paper and a grafted film. One grafted film contacts the positive electrode material, and the other grafted film contacts the negative electrode material;; The negative electrode cover 1 is provided with a flanging 11. The opening end of the positive electrode case 6 forms an R position and is in contact connection with the insulating rubber ring 3 and the flanging 11 of the negative electrode cover 1; and the negative electrode cover 1 is made of a composite metal material. The PVC film 9 is sleeved on the periphery of the battery, and the end faces of the positive electrode case 6 and the negative electrode cover 1 are exposed. The positive electrode sheet 7 is welded to the positive electrode case 6, and the negative electrode sheet 8 is welded to the negative electrode cover 1. The positive electrode sheet and the negative electrode sheet have different welding positions, directions and angles.

[0047] Embodiment 1

[0048] A preparation method of a professional pulsed mercury-free silver oxide button battery includes the following steps:

[0049] S1. Preparation of the positive electrode material. Weigh the following raw materials by weight: granulated silver oxide 83.7 parts; electrolytic manganese dioxide 3.5 parts; fine powder mixed graphite 4.6 parts; polyacrylic acid 0.18 part; potassium hydroxide 2.45 parts; deionized water 5.6 parts.

[0050] a1. Mix polyacrylic acid and silver oxide and stir for 10 minutes;

[0051] b1. Add graphite, polyacrylic acid after being treated in step a1 with electrolytic manganese dioxide and granulated silver oxide into a container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an ambient temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0052] c1. Press the positive electrode powder into a cake with a cake press to obtain the positive electrode cake;

[0053] d1. Add potassium hydroxide to deionized water and stir until the material dissolves;

[0054] e1. After the solution in step d1 cools down, adjust the specific gravity to 1.25 - 1.27 g / ml at 25 °C to obtain the positive electrode liquid;

[0055] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0056] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts for preparing the mixed zinc powder and 0.1 part for preparing the negative electrode liquid); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0057] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly;

[0058] b2. Then add potassium hydroxide to step a2, stir until the material dissolves and let it stand for 4 - 5 hours;

[0059] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it completely dissolves.

[0060] d2. After the solution in step c2 cools down, adjust the specific gravity to 1.43 - 1.45 g / ml at 25 °C to obtain the negative electrode liquid;

[0061] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material;

[0062] S3. Preparation of professional pulsed mercury-free silver oxide button battery: Place the positive electrode cake into the positive electrode case, inject the positive electrode liquid onto the positive electrode cake. After the positive electrode liquid is absorbed, install the separator (three layers) onto the positive electrode cake. At the same time, put the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the epoxy resin type pouring adhesive is applied to the gap between the negative electrode cover and the insulating rubber ring, and the epoxy resin type pouring adhesive is applied to the gap between the positive electrode case and the insulating rubber ring. Then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and shrink the PVC film by hot air. Finally, laser-weld the positive and negative electrode sheets to the positive electrode case and the negative electrode cover of the battery respectively.

[0063] Among them, the negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0064] Example 2

[0065] A preparation method of a professional pulsed mercury-free silver oxide button battery includes the following steps:

[0066] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight: 85.5 parts of granulated silver oxide; 1.7 parts of electrolytic manganese dioxide; 4.6 parts of fine powder mixed graphite; 0.18 part of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0067] a1. Mix polyacrylic acid with silver oxide and stir for 10 minutes;

[0068] b1. Add graphite, electrolytic manganese dioxide, polyacrylic acid after step a1 treatment, and granulated silver oxide into the container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an environmental temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0069] c1. Press the positive electrode powder into a cake with a press cake machine to obtain the positive electrode cake;

[0070] d1. Add potassium hydroxide to deionized water and stir until the material dissolves;

[0071] e1. After the solution in step d1 cools, adjust the specific gravity to 1.25 - 1.27 g / ml at 25 °C to obtain the positive electrode liquid;

[0072] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0073] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight parts: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts are used for preparing the mixed zinc powder, and 0.1 part is used for preparing the negative electrode solution); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0074] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly.

[0075] b2. Then add potassium hydroxide to step a2, stir until the materials are dissolved and let stand for 4 - 5 hours.

[0076] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until completely dissolved.

[0077] d2. After the solution in step c2 cools, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode solution.

[0078] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode solution obtained in step d2 into the mixed zinc powder to obtain the negative electrode material.

[0079] S3. Preparation of the professional pulsed mercury - free silver oxide button battery: Install the positive electrode cake into the positive electrode case, inject the positive electrode solution onto the positive electrode cake. After the positive electrode solution is absorbed, install the diaphragm (three - layer) onto the positive electrode cake. At the same time, put the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated by dipping). Among them, the negative electrode cover is treated by printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin - type perfusion adhesive. The gap between the positive electrode case and the insulating rubber ring is coated with an epoxy resin - type perfusion adhesive, and then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, make the PVC film shrink through hot air, and finally laser - weld the positive and negative electrode sheets on the positive electrode case and the negative electrode cover of the battery respectively.

[0080] Among them, the negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless - steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0081] Example 3

[0082] A preparation method of a professional pulsed mercury - free silver oxide button battery, including the following steps:

[0083] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight parts: 87.4 parts of granulated silver oxide; 0.7 part of electrolytic manganese dioxide; 3.7 parts of fine - powder mixed graphite; 0.18 part of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0084] a1. Mix polyacrylic acid with silver oxide and stir for 10 minutes;

[0085] b1. Add graphite, electrolytic manganese dioxide, the polyacrylic acid treated in step a1, and granulated silver oxide into a container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an environmental temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0086] c1. Press the positive electrode powder into a cake with a press to obtain the positive electrode cake;

[0087] d1. Add potassium hydroxide to deionized water and stir until the material dissolves;

[0088] e1. After the solution in step d1 cools down, adjust the specific gravity to 1.25 - 1.27 g / ml at 25 °C to obtain the positive electrode liquid;

[0089] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0090] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight parts: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts are used for preparing the mixed zinc powder, and 0.1 part is used for preparing the negative electrode liquid); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0091] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly;

[0092] b2. Then add potassium hydroxide to step a2 and stir until the material dissolves and let it stand for 4 - 5 hours;

[0093] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it completely dissolves.

[0094] d2. After the solution in step c2 cools down, adjust the specific gravity to 1.43 - 1.45 g / ml at 25 °C to obtain the negative electrode liquid;

[0095] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material;

[0096] S3. Preparation of professional pulse mercury-free silver oxide button battery: Place the positive electrode cake into the positive electrode case, inject the positive electrode liquid onto the positive electrode cake, and after the positive electrode liquid is absorbed, install the diaphragm (three layers) onto the positive electrode cake. At the same time, load the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin type perfusion adhesive. The gap between the positive electrode case and the insulating rubber ring is coated with an epoxy resin type perfusion adhesive, and then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and make the PVC film shrink through hot air. Finally, laser-weld the positive and negative electrode sheets on the positive electrode case and the negative electrode cover of the battery respectively.

[0097] Among them, the negative electrode cover 1 is made of a composite metal material, including a nickel layer, a stainless steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0098] Example 4

[0099] A preparation method of a professional pulse mercury-free silver oxide button battery includes the following steps:

[0100] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight parts: granulated silver oxide 88.1 parts; fine powder mixed graphite 3.7 parts; polyacrylic acid 0.18 parts; potassium hydroxide 2.45 parts; deionized water 5.6 parts.

[0101] a1. Mix polyacrylic acid and silver oxide and stir for 10 minutes.

[0102] b1. Add graphite, polyacrylic acid treated in step a1, and granulated silver oxide into the container in sequence, and stir at a rotation speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an ambient temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain the positive electrode powder.

[0103] c1. Press the positive electrode powder into a cake with a cake press to obtain the positive electrode cake.

[0104] d1. Add potassium hydroxide to deionized water and stir until the material dissolves.

[0105] e1. After the solution in step d1 cools, adjust the specific gravity to 1.25 - 1.27 g / ml at 25 °C to obtain the positive electrode liquid

[0106] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0107] S2. Preparation of negative electrode material: Weigh the following raw materials by weight: 66.6 parts of zinc powder; 0.9 part of carboxymethyl cellulose (0.8 part for preparing mixed zinc powder and 0.1 part for preparing negative electrode solution); 0.8 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0108] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly.

[0109] b2. Then add potassium hydroxide to step a2, stir until the material dissolves and let it stand for 4 - 5 hours.

[0110] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until completely dissolved.

[0111] d2. After the solution in step c2 cools down, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode solution.

[0112] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain mixed zinc powder. When preparing the battery, inject the negative electrode solution obtained in step d2 into the mixed zinc powder to obtain the negative electrode material.

[0113] S3. Preparation of professional pulsed mercury - free silver oxide button battery: Place the positive electrode cake into the positive electrode case, inject the positive electrode solution onto the positive electrode cake. After the positive electrode solution is absorbed, install the diaphragm (three - layer) onto the positive electrode cake. At the same time, put the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with epoxy resin - type perfusion adhesive. The gap between the positive electrode case and the insulating rubber ring is also coated with epoxy resin - type perfusion adhesive. Then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and make the PVC film shrink through hot air. Finally, laser - weld the positive and negative electrode sheets on the positive electrode case and the negative electrode cover of the battery respectively.

[0114] The negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless - steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0115] Example 5

[0116] A preparation method of a professional pulsed mercury - free silver oxide button battery, including the following steps:

[0117] S1. Preparation of positive electrode material: Weigh the following raw materials by weight: 87.4 parts of granulated silver oxide; 0.7 part of electrolytic manganese dioxide; 3.7 parts of fine - powder mixed graphite; 0.18 part of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0118] a1. Mix polyacrylic acid with silver oxide and stir for 10 minutes;

[0119] b1. Add graphite, electrolytic manganese dioxide, the polyacrylic acid treated in step a1, and granulated silver oxide into a container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an environmental temperature of 10 - 30°C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0120] c1. Press the positive electrode powder into a cake with a cake press to obtain the positive electrode cake;

[0121] d1. Add potassium hydroxide into deionized water and stir until the materials are dissolved;

[0122] e1. After the solution in step d1 cools down, adjust the specific gravity to 1.25 - 1.27 g / ml at 25°C to obtain the positive electrode liquid;

[0123] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0124] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight: 66.6 parts of zinc powder; 0.9 parts of carboxymethyl cellulose (0.8 parts for preparing the mixed zinc powder and 0.1 part for preparing the negative electrode liquid); 0.8 parts of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0125] a2. Add zinc oxide and indium hydroxide into deionized water and stir evenly;

[0126] b2. Then add potassium hydroxide to step a2 and stir until the materials are dissolved and let it stand for 4 - 5 hours;

[0127] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it is completely dissolved.

[0128] d2. After the solution in step c2 cools down, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode liquid;

[0129] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material;

[0130] S3. Preparation of a professional pulsed mercury-free silver oxide button battery: Place the positive electrode cake into the positive electrode case, inject the positive electrode liquid onto the positive electrode cake. After the positive electrode liquid is absorbed, place the diaphragm (three layers) onto the positive electrode cake. At the same time, load the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin type pouring adhesive. The gap between the positive electrode case and the insulating rubber ring is coated with an epoxy resin type pouring adhesive, and then load the combination of the negative electrode cover and the insulating rubber ring for sealing. Slip the PVC film over the battery, shrink the PVC film by hot air, and finally laser-weld the positive and negative electrode sheets to the positive electrode case and the negative electrode cover of the battery respectively.

[0131] Among them, the negative electrode cover 1 is made of a composite metal material, including a nickel layer, a stainless steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0132] Example 6

[0133] A preparation method of a professional pulsed mercury-free silver oxide button battery includes the following steps:

[0134] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight: 87.4 parts of granulated silver oxide; 0.7 part of electrolytic manganese dioxide; 3.7 parts of fine powder mixed graphite; 0.18 part of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0135] a1. Mix polyacrylic acid with silver oxide and stir for 10 minutes;

[0136] b1. Add graphite, electrolytic manganese dioxide, polyacrylic acid after step a1 treatment, and granulated silver oxide into the container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an environmental temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain the positive electrode powder;

[0137] c1. Press the positive electrode powder into a cake with a press cake machine to obtain the positive electrode cake;

[0138] d1. Add potassium hydroxide to deionized water and stir until the material dissolves;

[0139] e1. After the solution in step d1 cools, adjust the specific gravity to 1.25 - 1.27 g / ml at 25 °C to obtain the positive electrode liquid;

[0140] f1. When preparing the battery, inject the positive electrode liquid obtained in step e1 into the positive electrode cake to obtain the positive electrode material.

[0141] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight parts: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts are used for preparing the mixed zinc powder, and 0.1 part is used for preparing the negative electrode solution); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0142] a2. Add zinc oxide and indium hydroxide into deionized water and stir evenly.

[0143] b2. Then add potassium hydroxide to step a2, stir until the materials are dissolved and let it stand for 4 - 5 hours.

[0144] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until completely dissolved.

[0145] d2. After the solution in step c2 cools down, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode solution.

[0146] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode solution obtained in step d2 into the mixed zinc powder to obtain the negative electrode material.

[0147] S3. Preparation of the professional pulse mercury - free silver oxide button battery: Place the positive electrode cake into the positive electrode shell, inject the positive electrode solution onto the positive electrode cake. After the positive electrode solution is absorbed, place the diaphragm (four - layer) onto the positive electrode cake. At the same time, put the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated by dipping). Among them, the negative electrode cover is treated by printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin - type perfusion adhesive. The gap between the positive electrode shell and the insulating rubber ring is also coated with an epoxy resin - type perfusion adhesive. Then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and make the PVC film shrink by hot air. Finally, laser - weld the positive and negative electrode sheets on the positive electrode shell and the negative electrode cover of the battery respectively.

[0148] Among them, the negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless - steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0149] Comparative Example 1

[0150] A preparation method of a mercury - free silver oxide button battery includes the following steps:

[0151] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight parts: 55.2 parts of ordinary ungranulated silver oxide; 32 parts of electrolytic manganese dioxide; 4.6 parts of ordinary graphite; 0.18 of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0152] a1. Add ordinary graphite, electrolytic manganese dioxide, and ordinary ungranulated silver oxide into a container in sequence. Stir at a rotation speed of 20 - 40 revolutions per minute for 15 - 20 minutes under the conditions of an environmental temperature of 10 - 30°C and a humidity of 45 - 70% RH to obtain semi-finished positive electrode powder.

[0153] b1. Use a cake press to press and crush the semi-finished positive electrode powder processed in step a1 three times to obtain crude positive electrode powder.

[0154] c1. Pass the crude positive electrode powder processed in step b1 through 50-mesh and 100-mesh sieves, and take the 50 - 100 mesh as the finished product of the positive electrode powder.

[0155] d1. Put the finished product of the positive electrode powder processed in step c1 into a vacuum oven and dry it at 60 ± 5°C for 2 hours.

[0156] g1. Press the dried positive electrode powder into a cake with a cake press to obtain a positive electrode cake.

[0157] h1. Add potassium hydroxide to deionized water and stir until the material dissolves.

[0158] i1. After the solution in step h1 cools, adjust the specific gravity to 1.25 - 1.27 g / ml (25°C) to obtain the positive electrode liquid.

[0159] j1. Inject the positive electrode liquid obtained in step i1 into the positive electrode cake to obtain the positive electrode material.

[0160] S2. Preparation of the negative electrode material. Weigh the following raw materials by weight: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts are used to prepare the mixed zinc powder, and 0.1 part is used to prepare the negative electrode liquid); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0161] a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly.

[0162] b2. Then add potassium hydroxide to step a2 and stir until the material dissolves and let it stand for 4 - 5 hours.

[0163] c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it completely dissolves.

[0164] d2. After the solution in step c2 cools, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode liquid.

[0165] e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material.

[0166] S3. Preparation of mercury-free silver oxide button battery: Put the positive electrode cake into the positive electrode case, inject the positive electrode liquid onto the positive electrode cake. After the positive electrode liquid is absorbed, install the separator (four layers) onto the positive electrode cake. At the same time, put the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the epoxy resin type pouring adhesive is applied to the gap between the negative electrode cover and the insulating rubber ring, and the epoxy resin type pouring adhesive is applied to the gap between the positive electrode case and the insulating rubber ring. Then install the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and make the PVC film shrink through hot air. Finally, laser-weld the positive and negative electrode sheets to the positive electrode case and the negative electrode cover of the battery respectively.

[0167] Among them, the negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0168] Comparative Example 2

[0169] A preparation method of a mercury-free silver oxide button battery includes the following steps:

[0170] S1. Preparation of the positive electrode material: Weigh the following raw materials by weight: 87.4 parts of ordinary ungranulated silver oxide; 0.7 part of electrolytic manganese dioxide; 3.7 parts of ordinary graphite; 0.18 part of polyacrylic acid; 2.45 parts of potassium hydroxide; 5.6 parts of deionized water.

[0171] a1. Add ordinary graphite, polyacrylic acid, and ordinary ungranulated silver oxide to the container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 15 - 20 minutes under the conditions of an ambient temperature of 10 - 30 °C and a humidity of 45 - 70% RH to obtain a semi-finished positive electrode powder.

[0172] b1. Use a cake press to press and crush the semi-finished positive electrode powder obtained in step a1 three times to obtain a crude positive electrode powder.

[0173] c1. Pass the crude positive electrode powder obtained in step b1 through 50-mesh and 100-mesh sieves, and take the 50 - 100-mesh as the finished positive electrode powder.

[0174] d1. Put the finished positive electrode powder obtained in step c1 into a vacuum oven and dry it at 60 ± 5 °C for 2 hours.

[0175] g1. Press the dried positive electrode powder into a cake with a cake press to obtain the positive electrode cake.

[0176] h1. Add potassium hydroxide to deionized water and stir until the material dissolves.

[0177] i1. After the solution in step h1 cools, adjust the specific gravity to 1.25 - 1.27 g / ml (25 °C) to obtain the positive electrode liquid.

[0178] J1. Inject the positive electrode liquid obtained in step I1 into the positive electrode cake to obtain the positive electrode material.

[0179] S2. Preparation of the negative electrode material: Weigh the following raw materials by weight: 66.6 parts of zinc powder; 1.3 parts of carboxymethyl cellulose (1.2 parts are used for preparing the mixed zinc powder, and 0.1 part is used for preparing the negative electrode liquid); 0.4 part of sodium polyacrylate; 1.6 parts of zinc oxide; 0.01 part of indium hydroxide; 13.3 parts of potassium hydroxide; 16.9 parts of deionized water.

[0180] A2. Add zinc oxide and indium hydroxide to deionized water and stir evenly.

[0181] B2. Then add potassium hydroxide to step A2 and stir until the materials are dissolved and let stand for 4 - 5 hours.

[0182] C2. Then add carboxymethyl cellulose to step B2 and stir rapidly until completely dissolved.

[0183] D2. After the solution in step C2 cools, adjust the specific gravity to 1.43 - 1.45 g / ml at 25°C to obtain the negative electrode liquid.

[0184] E2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step D2 into the mixed zinc powder to obtain the negative electrode material.

[0185] S3. Preparation of the mercury - free silver oxide button battery: Place the positive electrode cake into the positive electrode shell, inject the positive electrode liquid onto the positive electrode cake. After the positive electrode liquid is absorbed, place the diaphragm (four - layer) onto the positive electrode cake. At the same time, load the zinc paste into the combination of the negative electrode cover and the insulating rubber ring (the insulating rubber ring is treated with dipping glue), where the negative electrode cover is treated with printing glue, and the gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin - type pouring adhesive. The gap between the positive electrode shell and the insulating rubber ring is also coated with an epoxy resin - type pouring adhesive, and then load the combination of the negative electrode cover and the insulating rubber ring for sealing. Put the PVC film over the battery, and make the PVC film shrink through hot air. Finally, laser - weld the positive and negative electrode sheets on the positive electrode shell and the negative electrode cover of the battery respectively.

[0186] The negative electrode cover 1 is composed of a composite metal material, including a nickel layer, a stainless - steel layer, a copper layer, and tin arranged in sequence from outside to inside.

[0187] Performance comparison between the professional pulsed mercury - free silver oxide button batteries (model: SR716) of Examples 1 - 6 of the present invention and the mercury - free silver oxide button battery (model: SR716) of Comparative Example 1 is shown in Table 1 as follows:

[0188] Table 1

[0189]

[0190] The performance comparison between the professional pulse mercury-free silver oxide button batteries (model: SR716) of Examples 1 to 6 of the present invention and the mercury-free silver oxide button battery (model: SR716) of Comparative Example 2 is shown in Table 2 as follows:

[0191] Table 2

[0192]

[0193] It can be seen from Table 1 and Table 2 that there is no liquid leakage phenomenon in the professional pulse mercury-free silver oxide button batteries of Examples 1 to 6 of the present invention, and the discharge performance is significantly improved. Among them, the number of discharges of the professional pulse mercury-free silver oxide button batteries of Examples 3, 4, and 5 reaches more than 5000 times at 10 mA 1S / 10S pulse (24 h / d, cut-off voltage 0.9).

[0194] The heavy metal test results of the professional pulse mercury-free silver oxide button battery of Example 5 of the present invention (the testing organization is Bureau Veritas Certification Services (Guangzhou) Co., Ltd., test report number: (9324) 344-2451) are shown in Table 3 as follows:

[0195] Table 3

[0196] Test item Cadmium (Cd) Lead (Pb) Mercury (Hg) Limit value 0.002 0.010 0.0005 Unit %(w / w) %(w / w) %(w / w) Method detection limit 0.0010 0.0010 0.0001 Test result <0.0010 <0.0010 <0.0001

[0197] The test conclusion is that the test results of the professional pulse mercury-free silver oxide button battery of Example 5 do not exceed the limits mentioned in the EU Battery Directive 2006 / 66 / EC and its amending Directive 2013 / 56 / EU of Chapter 4.

[0198] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A professional pulse mercury-free silver oxide button battery, comprising a positive electrode sheet, a PVC film, a positive electrode case, a positive electrode material, a separator, a negative electrode material, an insulating rubber ring and a negative electrode cover, and a negative electrode sheet arranged in sequence from outside to inside, characterized in that: The positive electrode plate is disposed outside the positive electrode case, the positive electrode material is disposed inside the positive electrode case, the negative electrode cover is provided with a negative electrode material, an insulating rubber ring is disposed between the positive electrode case and the negative electrode cover, a separator is disposed between the positive electrode material and the negative electrode material, the negative electrode cover is provided with a turned edge, and the open end of the positive electrode case forms an R position and is in contact connection with the insulating rubber ring and the turned edge of the negative electrode cover.

2. The specialty pulse mercury-free silver oxide button cell according to claim 1, wherein: The number of separator layers is two. The two separators include a grafted film and a cellophane. The grafted film is in contact with the positive electrode material, and the cellophane is in contact with the negative electrode material.

3. The professional pulse mercury-free silver oxide button cell according to claim 1, characterized in that: The number of separator layers is three. The three separators include a grafted film, a cellophane, and a grafted film. One grafted film is in contact with the positive electrode material, and the other grafted film is in contact with the negative electrode material.

4. A professional pulse mercury-free silver oxide button battery according to claim 1, characterized in that: The positive electrode material comprises the following raw materials in parts by weight: 85-90 parts of silver oxide; 0-3 parts of electrolytic manganese dioxide; 2-5 parts of graphite; 0.14-0.22 parts of polyacrylic acid; 2-4 parts of potassium hydroxide, and 4-7 parts of deionized water.

5. A professional pulse mercury-free silver oxide button battery according to claim 1, characterized in that: The negative electrode material comprises the following raw materials in parts by weight: 64-69 parts of zinc powder; 0.5-1.7 parts of carboxymethyl cellulose; 0.3-1.0 parts of sodium polyacrylate; 1.4-2.0 parts of zinc oxide; 0.01-0.05 parts of indium hydroxide; 11-16 parts of potassium hydroxide; 15-20 parts of deionized water; wherein 0.50-1.5 parts of carboxymethyl cellulose is used for mixing the zinc powder, 0.06-0.12 parts is used for preparing the negative electrode liquid, and the weight ratio of carboxymethyl cellulose to sodium polyacrylate in the negative electrode material is 1:

1.

6. A professional pulse mercury-free silver oxide button battery according to claim 1, characterized in that: The negative electrode cover is made of a composite metal material and includes, from outside to inside, a nickel layer, a stainless steel layer, a copper layer, and one of a tin layer, a tin alloy layer, an indium layer, and an indium alloy layer; the thickness of the nickel layer is 10-30 μm, the thickness of the copper layer is 30-50 μm, and the thickness of the tin layer or the tin alloy layer or the indium layer or the indium alloy layer is 0.1-2 μm; the nickel layer, the stainless steel layer, and the copper layer are compounded by high-temperature hot melting or electroplating or electroless plating, and the tin layer or the tin alloy layer or the indium layer or the indium alloy layer is electroplated or electroless plated.

7. A professional pulse mercury-free silver oxide button battery according to claim 4, characterized in that: The silver oxide content is ≥ 99.9%, the loss on drying is ≤ 0.2%, the nitric acid-insoluble matter is ≤ 0.02%, the hydrochloric acid-insoluble precipitate is ≤ 0.04%, the free alkali is ≤ 0.012%, the nitrate is ≤ 0.005, the particle size distribution: below 200 mesh is less than 30%, 50 - 200 mesh is more than 70%, and the titration of the nitric acid solution is clear and transparent; the graphite is fine powder mixed graphite, containing 50% expanded graphite, its moisture content is ≤ 0.2%, the ash content is ≤ 0.15%, the carbon content is ≥ 99.85%, the loose bulk density > 0.06 g / cm 3 , the specific surface area is 10 - 20 m 2 / g, the particle size D50: 10 - 18 μm, trace metals: aluminum ≤ 100 ppm, calcium ≤ 200 ppm, iron ≤ 75 ppm, silicon ≤ 450 ppm; the basic viscosity (0.5%, 25 °C) of the polyacrylic acid is 6000 - 14000 mPa·s, and the pH value (0.5%, 25 °C) is 7.0 - 9.

0. The pH value of the sodium polyacrylate is 6.8 - 8.5, the loss on drying < 9.5%, the apparent density is 0.6 - 0.8 g / ml, the water absorption rate of deionized water > 260 g / g, the viscosity is 45000 - 95000 mPa·s, the iron content < 30 ppm, the proportion of particle size below 106 μm > 98%, the proportion of particle size below 53 μm > 80%, and the average particle size > 20 - 50 μm. The basic viscosity (1%, 25 °C) of the carboxymethyl cellulose is 1000 - 5000 mPa·s, the pH value (1%, 25 °C) is 6.0 - 8.0, and the purity > 99%; the pure potassium hydroxide content of the potassium hydroxide is > 90%, the potassium carbonate content < 1.0%, the gas generation rate < 0.05 ml / g·day, the Cl content < 0.01%, the iron content < 5 mg / kg, and the lead content < 10 mg / kg.

8. A professional pulse mercury-free silver oxide button battery according to claim 5, characterized in that: The particle size distribution range of the zinc powder is as follows: the proportion of particles larger than 50 mesh is 0%, the proportion of particles with a size of 50 to 100 mesh is 25 - 45%, the proportion of particles with a size of 100 to 140 mesh is 25 - 40%, the proportion of particles with a size of 140 to 200 mesh is 25 - 40%, and the proportion of particles smaller than 200 mesh is 0%; the zinc content of the zinc powder is greater than 99.5%, the indium content is 150 - 250 ppm, the bismuth content is 100 - 200 ppm, the aluminum content is 50 - 100 ppm, the lead content is ≤ 30 ppm, the cadmium content is ≤ 10 ppm, and the mercury content is ≤ 1 ppm; the iron content is ≤ 3 ppm, the zinc oxide content is ≤ 0.3%, the loose bulk density of the zinc powder is 2.90 ± 0.30 g / ml; the gas evolution rate of the zinc powder is < 15 μl / g.d at 45°C; the purity of the zinc oxide is > 99.7%, the lead oxide content is ≤ 0.008%, the manganese oxide content is ≤ 0.0001%, the copper oxide is ≤ 0.0002%, the hydrochloric acid insoluble matter is ≤ 0.006%, the water-soluble matter is ≤ 0.10%, the volatile matter at 105°C is ≤ 0.30%, the ignition loss is ≤ 0.20%, the residue on sieve (45μm test sieve) is ≤ 0.1%, no metallic matter (calculated as Zn), the iron content is ≤ 0.0050%, and the cadmium content is ≤ 0.0020%; the purity of the indium hydroxide is > 99.9, and the contents of its impurities (Cd, Fe, Ni, Cu, Pb, Sn, Al, As, Ti, Sb) are all < 5 ppm.

9. A preparation method of a professional pulse mercury-free silver oxide button battery, characterized in that: It includes the following steps: S1. Preparation of the positive electrode material: a1. Mix polyacrylic acid and silver oxide and stir for 10 minutes. b1. Add graphite, the polyacrylic acid and silver oxide treated in step a1 into a container in sequence, and stir at a speed of 20 - 40 revolutions per minute for 10 - 15 minutes under the conditions of an ambient temperature of 15 - 30°C and a humidity of 45 - 70% RH to obtain the positive electrode powder. c1. Press the positive electrode powder into a cake with a cake press to obtain the positive electrode cake. d1. Add potassium hydroxide to deionized water and stir until the materials are dissolved. e1. After the solution in step d1 cools, adjust the specific gravity to 1.24 - 1.30 g / ml at 25°C to obtain the positive electrode liquid. f1. Inject the positive electrode liquid obtained in step h1 into the positive electrode cake to obtain the positive electrode material. S2. Preparation of the negative electrode material: a2. Add zinc oxide and indium hydroxide to deionized water and stir evenly. b2. Then add potassium hydroxide to step a2 and stir until the materials are dissolved and let it stand for 4 - 5 hours. c2. Then add carboxymethyl cellulose to step b2 and stir rapidly until it is completely dissolved. d2. After the solution in step c2 cools, adjust the specific gravity to 1.41 - 1.47 g / ml at 25°C to obtain the negative electrode liquid. e2. Mix zinc powder, carboxymethyl cellulose, and sodium polyacrylate evenly to obtain the mixed zinc powder. When preparing the battery, inject the negative electrode liquid obtained in step d2 into the mixed zinc powder to obtain the negative electrode material. S3. Preparation of professional pulse mercury-free silver oxide button battery: Then, the positive electrode cake is loaded into the positive electrode case, the positive electrode liquid is injected onto the positive electrode cake. After the positive electrode liquid is absorbed, the separator is loaded onto the positive electrode cake. At the same time, the negative electrode material is loaded into the combination of the negative electrode cover and the insulating rubber ring. The negative electrode liquid is injected onto the mixed zinc powder, and the combination of the negative electrode cover and the insulating rubber ring is loaded, and then sealing is carried out. The PVC film is sleeved on the battery, and the PVC film is shrunk by hot air. Finally, the positive and negative electrode sheets are laser welded to the positive electrode case and the negative electrode cover of the battery respectively.

10. The preparation method of a professional pulse mercury-free silver oxide button battery according to claim 9, characterized in that: The gap between the negative electrode cover and the insulating rubber ring is coated with an epoxy resin type pouring adhesive, and the gap between the positive electrode case and the insulating rubber ring is coated with an epoxy resin type pouring adhesive.

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