Positive lead paste, preparation method and long-service-life lead-acid storage battery for power

Abstract

The invention discloses positive electrode lead paste, a preparation method and a long-service-life power lead-acid storage battery, and relates to the technical field of positive electrode lead pastes.The positive electrode lead paste is prepared from, by weight, 80-85 parts of lead powder; 5-10 parts of sulfuric acid; 8 to 12 parts of pure water; 0.1 to 0.15 part of graphite; 0.08 to 0.1 part of short fiber; 0.08 to 0.1 part of antimony trioxide; 0.1 to 0.12 part of stannous mono-sulphate; and 0.2 to 0.25 part of a service life strengthening bag. The service life strengthening bag is prepared from the following components in parts by weight: 0.05 to 0.08 part of PTFE (Polytetrafluoroethylene); 0.08 to 0.1 part of cobalt sulfate; and 0.05 to 0.1 part of potassium hydroxide. By adding the service life strengthening package, cobalt ions can increase the density of a grid corrosion layer, and the combination of the grid and an active substance is enhanced; the binding force of active substances is enhanced through PTFE; potassium hydroxide reacts with sulfuric acid to generate potassium sulfate, so that the viscosity of the lead paste is improved, and the pole plate strength is improved; polar plate porosity is increased after potassium sulfate is dissolved, and battery capacity is improved. Therefore, softening and falling of active substances are slowed down, and the cycle life of the battery is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of positive paste, and in particular, to a positive paste, a preparation method, and a long-life lead-acid battery for power. Background Art

[0002] Lead-acid batteries are common energy storage batteries and are widely used in fields such as automobiles. The electrode plate is an important component of a lead-acid battery. During the charge and discharge process of the lead-acid battery, the volume of the positive active material continuously shrinks and expands, resulting in the softening and shedding of the positive active material, which is a well-recognized technical problem in the battery industry. During the discharge process of the battery, due to the mutual conversion between lead sulfate and lead dioxide, the structure of the porous electrode changes because the density and volume of lead sulfate, the product after the discharge of the positive active material lead dioxide, have changed greatly. The shrinkage and expansion of the volume of the positive active material during the charge and discharge process lead to a very poor bonding force between the active materials and between the active materials and the grid, resulting in the softening and shedding of the active materials. Therefore, it is necessary to improve the positive paste to solve the problem of shedding of the positive active material. Summary of the Invention

[0003] In order to solve at least one of the above technical problems and develop a positive paste with positive active materials that are not easily shed, the present application provides a positive paste, a preparation method, and a long-life lead-acid battery for power.

[0004] On the one hand, a positive paste provided by the present application is prepared from components including the following in parts by weight:

[0005] Lead powder: 80 - 85 parts;

[0006] Sulfuric acid: 5 - 10 parts;

[0007] Pure water: 8 - 12 parts;

[0008] Graphite: 0.1 - 0.15 parts;

[0009] Short fiber: 0.08 - 0.1 part;

[0010] Antimony trioxide: 0.08 - 0.1 part;

[0011] Stannous sulfate: 0.1 - 0.12 parts;

[0012] And a life extension package: 0.2 - 0.25 parts;

[0013] The life extension package is composed of components including the following in parts by weight:

[0014] PTFE: 0.05 - 0.08 part;

[0015] Cobalt sulfate: 0.08 - 0.1 part;

[0016] 0.05 to 0.1 part of potassium hydroxide.

[0017] Optionally, the positive electrode lead paste provided by the present application is prepared from the following components in parts by weight:

[0018] 82 to 84 parts of lead powder;

[0019] 6 to 8 parts of sulfuric acid;

[0020] 10 to 12 parts of pure water;

[0021] 0.12 to 0.14 part of graphite;

[0022] 0.09 to 0.1 part of short fiber;

[0023] 0.08 to 0.9 part of antimony trioxide;

[0024] 0.1 to 0.12 part of stannous sulfate;

[0025] and 0.22 to 0.24 part of a life extension package;

[0026] The life extension package is composed of the following components in parts by weight:

[0027] 0.05 to 0.08 part of PTFE;

[0028] 0.08 to 0.1 part of cobalt sulfate;

[0029] 0.05 to 0.1 part of potassium hydroxide.

[0030] Optionally, the weight ratio of the lead powder to the life extension package is 350 to 377:1.

[0031] Optionally, the short fiber is one or a combination of polyester fiber, polypropylene fiber, polyacrylonitrile fiber, nitrile chloroprene fiber, polyethylene fiber, and polyamide fiber.

[0032] In a second aspect, the present application provides a method for preparing the above positive electrode lead paste, including the following steps:

[0033] S1. Mix the formulated amounts of PTFE, cobalt sulfate, and potassium hydroxide to obtain a life extension package;

[0034] S2. Add the formulated amount of lead powder to a paste mixer, and add the formulated amounts of graphite, short fiber, antimony trioxide, and stannous sulfate, and stir;

[0035] S3. Mix the formulated amount of water with the life extension package in S1, add it to the paste mixer in S2, and stir;

[0036] S4. Add sulfuric acid in the formula amount to the paste mixer, and the acid addition time is 13 - 15 min. After temperature reduction treatment, the positive electrode lead paste is obtained.

[0037] Optionally, in S2, dry stirring is adopted for stirring, and the stirring time is 4 - 5 min.

[0038] Optionally, in S3, after water is mixed with the life enhancement package, it is added to the paste mixer in S2 within 2 min, and stirred for 5 - 6 min.

[0039] Optionally, in S4, the temperature reduction treatment is as follows: when the temperature of the lead paste reaches 72 °C - 75 °C, start to cool down, and stir for 10 - 15 min while cooling down. The temperature when discharging the paste does not exceed 50 °C.

[0040] Optionally, in S4, a blower is used for air extraction and cooling.

[0041] In a third aspect, the present application provides a long - life lead - acid battery for power use, which uses the above - mentioned positive electrode lead paste.

[0042] In summary, the present invention includes at least one of the following beneficial technical effects:

[0043] 1. By adding the life enhancement package, cobalt ions can increase the density of the grid corrosion layer, and thus enhance the bonding between the grid and the active material; PTFE is added to the lead paste as a binder, which can strengthen the bonding force between the active materials; potassium hydroxide reacts with sulfuric acid to generate potassium sulfate. On the one hand, it can increase the viscosity of the lead paste, and thus improve the plate strength; on the other hand, the dissolved potassium sulfate can increase the porosity of the plate and improve the battery capacity; under the combined action of these three additives, the softening and shedding of the active material can be slowed down, and thus the cycle life of the battery can be improved;

[0044] 2. Adjusting the addition amount of the life enhancement package relative to the lead powder can further improve the cycle life of the battery. Description of the Drawings

[0045] Figure 1 It is the cycle life curve graph of battery 3 corresponding to Example 3 and battery 7 corresponding to Comparative Example 1. Detailed Embodiments

[0046] The following further elaborates the present application in detail with reference to the drawings and embodiments.

[0047] In the following embodiments of the present application, unless otherwise specified, the main components involved are all purchased from commercially available products.

[0048] The short fibers are exemplarily polyester short fibers.

[0049] Preparation Examples 1 to 6 were used to prepare the life-enhancing package, as follows.

[0050] Preparation Example 1

[0051] Mix 0.05 kg of PTFE, 0.08 kg of cobalt sulfate, and 0.1 kg of potassium hydroxide to obtain the life-enhancing package.

[0052] Preparation Example 2

[0053] Mix 0.08 kg of PTFE, 0.08 kg of cobalt sulfate, and 0.05 kg of potassium hydroxide to obtain the life-enhancing package.

[0054] Preparation Example 3

[0055] Mix 0.05 kg of PTFE, 0.1 kg of cobalt sulfate, and 0.1 kg of potassium hydroxide to obtain the life-enhancing package.

[0056] Preparation Example 4

[0057] Mix 0.08 kg of PTFE, 0.1 kg of cobalt sulfate, and 0.05 kg of potassium hydroxide to obtain the life-enhancing package.

[0058] Preparation Example 5

[0059] Mix 0.05 kg of PTFE, 0.08 kg of cobalt sulfate, and 0.05 kg of potassium hydroxide to obtain the life-enhancing package.

[0060] Preparation Example 6

[0061] Mix 0.08 kg of PTFE, 0.1 kg of cobalt sulfate, and 0.1 kg of potassium hydroxide to obtain the life-enhancing package. Specific Examples

[0063] Example 1

[0064] This example was used to prepare a positive electrode lead paste, as follows.

[0065] Add 80 kg of lead powder to a paste mixer, and add 0.1 kg of graphite, 0.08 kg of short fibers, 0.1 kg of antimony trioxide, and 0.1 kg of stannous sulfate, and stir using a dry mixing method for 5 minutes;

[0066] Mix 8 kg of water with 0.2 kg of the life-enhancing package prepared in Preparation Example 1, and add it to the paste mixer in S2 within 2 minutes and stir for 5 minutes;

[0067] S4. Add 10 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0068] Example 2

[0069] This example is used to prepare a positive electrode lead paste, which is as follows.

[0070] Add 81 kg of lead powder to the paste mixer, and add 0.11 kg of graphite, 0.08 kg of short fibers, 0.1 kg of antimony trioxide, and 0.11 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0071] Mix 8 kg of water with 0.21 kg of the life enhancement package prepared in Preparation Example 2, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0072] S4. Add 9 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0073] Example 3

[0074] This example is used to prepare a positive electrode lead paste, which is as follows.

[0075] Add 82 kg of lead powder to the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0076] Mix 10 kg of water with 0.22 kg of the life enhancement package prepared in Preparation Example 3, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0077] S4. Add 8 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0078] Example 4

[0079] This example is used to prepare a positive electrode lead paste, which is as follows.

[0080] Add 83 kg of lead powder into the paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0081] Mix 10 kg of water with 0.23 kg of the life enhancement package prepared in Preparation Example 4, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0082] S4. Add 7 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0083] Example 5

[0084] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0085] Add 84 kg of lead powder into the paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0086] Mix 12 kg of water with 0.24 kg of the life enhancement package prepared in Preparation Example 5, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0087] S4. Add 6 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0088] Example 6

[0089] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0090] Add 85 kg of lead powder into the paste mixer, and add 0.15 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.15 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0091] Mix 12 kg of water with 0.25 kg of the life enhancement package prepared in Preparation Example 6, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0092] S4. Add 5 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to cool down the temperature, and stir for 10 min while cooling down. The temperature when discharging the paste shall not exceed 50 °C to obtain the positive lead paste.

[0093] Comparative Example 1

[0094] This comparative example provides a positive lead paste. After adding 100 kg of lead powder (containing 2 kg of red lead oxide) to the paste mixer, add 0.1 kg of graphite, 0.1 kg of short fiber, 0.08 kg of stannous sulfate, and 0.12 kg of antimony trioxide, and perform dry stirring for 4 min.

[0095] Add 10 kg of pure water to the paste mixer within 4 min for wet stirring, and stir for 4 min.

[0096] Add 9 kg of dilute sulfuric acid with a density of 1.325 g / cm 2 to the paste mixer. The addition time is controlled within 5 min, and the paste mixing temperature is controlled between 67 and 72 °C, and stir for 12 min.

[0097] When the temperature drops to 45 °C, measure the apparent density, and the apparent density is 4.5 g / cm 3 to obtain the positive lead paste.

[0098] Apply the positive lead paste in Examples 1-6 and Comparative Example 1 above to the plate. Cure it for 4 h in an environment with a temperature of 80 °C and a humidity of 100, and then enter the tunnel curing for 48 h. The curing temperature is 65-75 °C and the humidity is 95, and dry at 75 °C for 24 h. Detect that the free lead content is less than 2%; obtain the positive electrode plate. And apply it to a lead-acid battery (model 6-DZF-22) to obtain Batteries 1-7. Conduct a battery life test on Batteries 1-7 (terminate the test when the discharge capacity is lower than 80% of the rated capacity); the test results are shown in Table 1.

[0099] Table 1

[0100]

[0101]

[0102] It can be seen from Examples 1-6, Comparative Example 1, and Table 1 that for the lead-acid battery using the positive lead paste prepared in this application, its cycle life can reach 585 times. Compared with the lead-acid battery prepared using the positive lead paste in Comparative Example 1, its cycle life is 384 times, which is increased by more than 50%. The cycle life curves of Battery 3 and Battery 7 are as Figure 1 shown.

[0103] Further analysis of Examples 1 to 6 and Table 1 reveals that in the technical solution of this application, the weight ratio of lead powder to the life enhancement package affects the performance of the positive electrode lead paste. Therefore, the inventors made the following Examples 7 to 21, which are as follows.

[0104] Based on Example 3, Examples 7 to 11 only adjusted the addition amount of the life enhancement package to make the weight ratio of lead powder to the life enhancement package different; the details are as follows.

[0105] Example 7

[0106] This example is used to prepare a positive electrode lead paste, which is as follows.

[0107] Add 82 kg of lead powder to the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate, and stir by dry mixing for 5 minutes;

[0108] Mix 10 kg of water with 0.20 kg of the life enhancement package prepared in Preparation Example 3, and add it to the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0109] S4. Add 8 kg of sulfuric acid to the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature at the time of discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0110] Example 8

[0111] This example is used to prepare a positive electrode lead paste, which is as follows.

[0112] Add 82 kg of lead powder to the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate, and stir by dry mixing for 5 minutes;

[0113] Mix 10 kg of water with 0.21 kg of the life enhancement package prepared in Preparation Example 3, and add it to the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0114] S4. Add 8 kg of sulfuric acid to the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature at the time of discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0115] Example 9

[0116] This example is used to prepare a positive electrode lead paste, which is as follows.

[0117] Add 82 kg of lead powder into the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate. Stir in a dry mixing manner for 5 minutes;

[0118] Mix 10 kg of water with 0.23 kg of the life-enhancing package prepared in Preparation Example 3, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0119] S4. Add 8 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature at the time of discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0120] Example 10

[0121] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0122] Add 82 kg of lead powder into the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate. Stir in a dry mixing manner for 5 minutes;

[0123] Mix 10 kg of water with 0.24 kg of the life-enhancing package prepared in Preparation Example 3, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0124] S4. Add 8 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature at the time of discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0125] Example 11

[0126] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0127] Add 82 kg of lead powder into the paste mixer, and add 0.12 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.12 kg of stannous sulfate. Stir in a dry mixing manner for 5 minutes;

[0128] Mix 10 kg of water with 0.25 kg of the life-enhancing package prepared in Preparation Example 3, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0129] S4. Add 8 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste should not exceed 50 °C to obtain the positive electrode lead paste.

[0130] Prepare the positive electrode lead paste in Examples 7 to 11 into positive electrode plates and apply them to lead-acid batteries to obtain Batteries 8 to 12, and conduct a cyclic service life test. The test results are shown in Table 2.

[0131] Table 2

[0132]

[0133]

[0134] Based on Example 4, Examples 12 to 16 only adjust the addition amount of the life enhancement package to make the weight ratio of lead powder to the life enhancement package different; specifically as follows.

[0135] Example 12

[0136] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0137] Add 83 kg of lead powder to the paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0138] Mix 10 kg of water with 0.20 kg of the life enhancement package prepared in Preparation Example 4, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0139] S4. Add 7 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste should not exceed 50 °C to obtain the positive electrode lead paste.

[0140] Example 13

[0141] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0142] Add 83 kg of lead powder to the paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0143] Mix 10 kg of water with 0.21 kg of the life enhancement package prepared in Preparation Example 4, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0144] S4. Add 7 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0145] Example 14

[0146] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0147] Add 83 kg of lead powder to the paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0148] Mix 10 kg of water with 0.22 kg of the life enhancement package prepared in Preparation Example 4, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0149] S4. Add 7 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0150] Example 15

[0151] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0152] Add 83 kg of lead powder to the paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 min;

[0153] Mix 10 kg of water with 0.24 kg of the life enhancement package prepared in Preparation Example 4, and add it to the paste mixer in S2 within 2 min, and stir for 5 min;

[0154] S4. Add 7 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0155] Example 16

[0156] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0157] Add 83 kg of lead powder into a paste mixer, and add 0.13 kg of graphite, 0.09 kg of short fibers, 0.09 kg of antimony trioxide, and 0.13 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0158] Mix 10 kg of water with 0.25 kg of the life enhancement package prepared in Preparation Example 4, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0159] S4. Add 7 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to draw air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0160] Prepare the positive electrode lead paste in Examples 12 to 16 into positive electrode plates and apply them to lead-acid batteries to obtain Batteries 13 to 17, and conduct a cyclic service life test. The test results are shown in Table 3.

[0161] Table 3

[0162] Lead-acid battery Positive lead paste Life enhancement package Weight ratio of lead powder to life enhancement package Number of cycles Battery 13 Example 12 Preparation Example 4 415 589 times Battery 14 Example 13 Preparation Example 4 395 595 times Battery 15 Example 14 Preparation Example 4 377 621 times Battery 4 Example 4 Preparation Example 4 361 645 times Battery 16 Example 15 Preparation Example 4 346 598 times Battery 17 Example 16 Preparation Example 4 332 595 times

[0163] Based on Example 5, Examples 17 to 21 only adjust the addition amount of the life enhancement package to make the weight ratio of lead powder to the life enhancement package different; specifically as follows.

[0164] Example 17

[0165] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0166] Add 84 kg of lead powder into a paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0167] Mix 12 kg of water with 0.20 kg of the life enhancement package prepared in Preparation Example 5, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0168] S4. Add 6 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to draw air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0169] Example 18

[0170] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0171] Add 84 kg of lead powder into a paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0172] Mix 12 kg of water with 0.21 kg of the life-enhancing package prepared in Preparation Example 5, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0173] S4. Add 6 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0174] Example 19

[0175] This example is used to prepare a positive electrode lead paste, which is as follows.

[0176] Add 84 kg of lead powder into a paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0177] Mix 12 kg of water with 0.22 kg of the life-enhancing package prepared in Preparation Example 5, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0178] S4. Add 6 kg of sulfuric acid into the paste mixer. The acid addition time is 15 minutes. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 minutes while cooling. The temperature when discharging the paste does not exceed 50 °C to obtain the positive electrode lead paste.

[0179] Example 20

[0180] This example is used to prepare a positive electrode lead paste, which is as follows.

[0181] Add 84 kg of lead powder into a paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fibers, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 minutes;

[0182] Mix 12 kg of water with 0.23 kg of the life-enhancing package prepared in Preparation Example 5, and add it into the paste mixer in S2 within 2 minutes, and stir for 5 minutes;

[0183] S4. Add 6 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste should not exceed 50 °C to obtain the positive electrode lead paste.

[0184] Example 21

[0185] This example is used to prepare a positive electrode lead paste, specifically as follows.

[0186] Add 84 kg of lead powder to the paste mixer, and add 0.14 kg of graphite, 0.1 kg of short fiber, 0.08 kg of antimony trioxide, and 0.14 kg of stannous sulfate. Stir in a dry mixing method for 5 min.

[0187] Mix 12 kg of water with 0.25 kg of the life enhancement package prepared in Preparation Example 5, and add it to the paste mixer in S2 within 2 min, and stir for 5 min.

[0188] S4. Add 6 kg of sulfuric acid to the paste mixer. The acid addition time is 15 min. When the temperature reaches 72 °C, start to use a blower to extract air for cooling, and stir for 10 min while cooling. The temperature when discharging the paste should not exceed 50 °C to obtain the positive electrode lead paste.

[0189] Prepare the positive electrode lead paste in Examples 17 - 21 into positive electrode plates and apply them to lead - acid batteries to obtain Batteries 18 - 22, and conduct a cyclic service life test. The test results are shown in Table 4.

[0190] Table 4

[0191] Lead-acid battery Positive lead paste Life enhancement package Weight ratio of lead powder to life enhancement package Number of cycles Battery 18 Example 17 Preparation Example 5 420 587 times Battery 19 Example 18 Preparation Example 5 400 590 times Battery 20 Example 19 Preparation Example 5 382 594 times Battery 21 Example 20 Preparation Example 5 365 629 times Battery 5 Example 5 Preparation Example 5 350 623 times Battery 22 Example 21 Preparation Example 5 336 599 times

[0192] It can be seen from Examples 7 - 21 and Tables 2 - 4 that the weight ratio of lead powder to the life enhancement package in the technical solution of this application affects the performance of the positive electrode lead paste. When the weight ratio of lead powder to the life enhancement package is 350 - 377:1, the cyclic life of the lead - acid battery corresponding to the prepared positive electrode lead paste can reach more than 620 times, and the cyclic life can be improved by more than 58% compared with the lead - acid battery corresponding to Comparative Example 1.

[0193] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A positive electrode lead paste, characterized in that, Prepared from the following components by weight parts: 80 - 85 parts of lead powder; 5 - 10 parts of sulfuric acid; 8 - 12 parts of pure water; 0.1 - 0.15 parts of graphite; 0.08 - 0.1 parts of short fiber; 0.08 - 0.1 parts of antimony trioxide; 0.1 - 0.12 parts of stannous sulfate; and 0.2 - 0.25 parts of life enhancement package; The life enhancement package consists of the following components by weight parts: 0.05 - 0.08 parts of PTFE; 0.08 - 0.1 parts of cobalt sulfate; 0.05 - 0.1 parts of potassium hydroxide.

2. The positive electrode lead paste according to claim 1, characterized in that, Prepared from the following components by weight parts: 82 - 84 parts of lead powder; 6 - 8 parts of sulfuric acid; 10 - 12 parts of pure water; 0.12 - 0.14 parts of graphite; 0.09 - 0.1 parts of short fiber; 0.08 - 0.9 parts of antimony trioxide; 0.1 - 0.12 parts of stannous sulfate; and 0.22 - 0.24 parts of life enhancement package; The life enhancement package consists of the following components by weight parts: 0.05 - 0.08 parts of PTFE; 0.08 - 0.1 parts of cobalt sulfate; 0.05 - 0.1 parts of potassium hydroxide.

3. The positive electrode lead paste according to claim 1, wherein The weight ratio of the lead powder to the life enhancement package is 350 - 377:

1.

4. The positive electrode lead paste according to claim 1, wherein The short fiber is one or a combination of polyester fiber, polypropylene fiber, polyacrylonitrile fiber, nitrile chloroprene fiber, polyethylene fiber, and polyamide fiber.

5. The preparation method of the positive electrode lead paste according to claim 1, characterized in that, Including the following steps: S1. Mix the formulated amounts of PTFE, cobalt sulfate, and potassium hydroxide to obtain the life enhancement package; S2. Add the formulated amount of lead powder into a paste mixer, and add the formulated amounts of graphite, short fiber, antimony trioxide, and stannous sulfate, and stir; S3. Mix the formulated amount of water with the life enhancement package in S1, add it into the paste mixer in S2, and stir; S4. Add the formulated amount of sulfuric acid into the paste mixer, the acid addition time is 13 - 15 min, and after cooling treatment, the positive lead paste is obtained.

6. The preparation method according to claim 1, characterized in that, In S2, dry stirring is used for stirring, and the stirring time is 4 - 5 min.

7. The preparation method according to claim 1, characterized in that, In S3, after the water is mixed with the life enhancement package, it is added into the paste mixer in S2 within 2 min, and stirred for 5 - 6 min.

8. The preparation method according to claim 1, characterized in that, In S4, the cooling treatment is as follows: when the temperature of the lead paste reaches 72℃ - 75℃, start to cool down, and stir for 10 - 15 min while cooling down, and the temperature at the time of discharging the paste does not exceed 50℃.

9. The preparation method according to claim 1, wherein In S4, a blower is used for air extraction and cooling.

10. A lead-acid battery for long-life power, characterized in that, Use the positive lead paste in claim 1.

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