A positive and negative electrode composition suitable for various types of electrode plates and a method for preparing the same

Abstract

This invention discloses a positive and negative electrode composition suitable for various types of electrode plates and its preparation method, belonging to the technical field of lead-acid battery manufacturing processes for start-stop and starting. The positive electrode composition suitable for various types of electrode plates includes 100 parts by weight of lead powder, 9-11 parts by weight of 1.400 g / ml dilute sulfuric acid, 13-14 parts by weight of pure water, 0.15-0.22 parts by weight of anisotropic graphite, and 0.072-0.08 parts by weight of polyester staple fiber; suitable for various types of electrode plates. The negative electrode composition comprises 100 parts by weight of lead powder, 0.072–0.08 parts by weight of polyester staple fiber, 0.15–0.25 parts by weight of acetylene black, 0.35–0.52 parts by weight of humic acid, 0.09–0.12 parts by weight of sodium lignin sulfonate, 0.8–1.0 parts by weight of barium sulfate, 7.0–8.0 parts by weight of 1.400 g / ml dilute sulfuric acid, 0.04–0.09 parts by weight of stearic acid, and 11.5–12.5 parts by weight of pure water. The positive and negative electrode compositions of this invention are applicable to various types of electrode plates and meet the requirements of conventional cooked electrode plates, conventional dry-charged electrode plates, and native electrode plates.

Description

Technical Field

[0001] This invention belongs to the technical field of lead-acid battery manufacturing process for start-stop and starting applications, specifically relating to a positive and negative electrode composition applicable to various types of plates and its preparation method. Background Technology

[0002] For lead-acid batteries used for starting and stopping motorcycles and automobiles, there are various manufacturing processes, including: (1) mature plate assembly batteries, which are formed by adding acid, replenishing charge, and covering the safety valve; (2) mature plate assembly batteries, which are dry-charged closed valve-controlled batteries that can be used by adding acid water before use, referred to as "dry-charged batteries"; (3) raw plate assembly batteries, which are formed by adding acid, internal formation, and covering the valve; (4) raw plate assembly batteries, which are formed by adding acid, adding glue, internal formation, and covering the valve.

[0003] Although production processes (1) and (2) are no longer permitted by the state (due to the large amount of acid mist and wastewater generated during the external formation of the plates, which affects the environment), many foreign factories still use them (because of the low investment cost). Our company has different requirements for the lead paste formulas for the positive and negative electrodes in the manufacturing of the above four process routes, causing many management inconveniences: ① The required formula substances added during the paste-making process are inconsistent, making errors easy; ② Semi-finished and finished plates cannot be used interchangeably for battery manufacturing across different process routes, resulting in large inventories and a high risk of expiration and scrapping; ③ The plate formula type is easily misused during battery assembly. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings in the prior art, one of the objectives of the present invention is to provide a positive electrode composition applicable to various types of electrode plates, including conventional conventional electrode plates, conventional dry-charged electrode plates, and native electrode plates.

[0005] The second objective of this invention is to provide a negative electrode composition applicable to various types of electrode plates, including conventional conventional electrode plates, conventional dry-charged electrode plates, and native electrode plates.

[0006] The third objective of this invention is to provide a positive electrode plate that, regardless of whether it is prepared by a conventional cooked electrode plate, a conventional dry-charged electrode plate, or a native electrode plate, has a high utilization rate of active materials, is easy to form into a green electrode plate for internal use or into a conventional cooked electrode plate externally, has fewer white spots, and has a long service life.

[0007] The fourth objective of this invention is to provide a negative electrode plate that, regardless of whether it is prepared by a conventional cooked electrode plate, a conventional dry-charged electrode plate, or a native electrode plate, has a high utilization rate of active materials, is easy to form into a green electrode plate for internal use or into a conventional cooked electrode plate externally, has a long service life, has appropriate antioxidant properties, and is resistant to storage.

[0008] The fifth objective of this invention is to provide a method for preparing positive and negative electrode plates, wherein the preparation process is less prone to powdering, rotting, and deformation.

[0009] To achieve one of the above objectives, the present invention adopts the following technical solution:

[0010] A positive electrode composition suitable for various types of electrode plates includes 100 parts by weight of lead powder, 9-11 parts by weight of 1.400 g / ml dilute sulfuric acid, and 13-14 parts by weight of pure water. The positive electrode composition further includes 0.15-0.22 parts by weight of anisotropic graphite and 0.072-0.08 parts by weight of polyester staple fiber.

[0011] Furthermore, the apparent specific gravity of the positive electrode composition suitable for various types of electrode plates is 4.25 ± 0.05 g / cm³. 3 .

[0012] To achieve the second objective mentioned above, the present invention adopts the following technical solution:

[0013] A negative electrode composition suitable for various types of electrode plates includes 100 parts by weight of lead powder, 0.072 to 0.08 parts by weight of polyester staple fiber, 0.15 to 0.25 parts by weight of acetylene black, 0.35 to 0.52 parts by weight of humic acid, 0.09 to 0.12 parts by weight of sodium lignosulfonate, 0.8 to 1.0 parts by weight of barium sulfate, 7.0 to 8.0 parts by weight of 1.400 g / ml dilute sulfuric acid, 0.04 to 0.09 parts by weight of stearic acid, and 11.5 to 12.5 parts by weight of pure water.

[0014] Furthermore, the apparent specific gravity of the negative electrode composition suitable for various types of electrode plates is 4.35 ± 0.05 g / cm³. 3 .

[0015] To achieve the third objective mentioned above, the present invention adopts the following technical solution:

[0016] A positive electrode plate is obtained by coating the positive electrode composition applicable to various types of electrode plates onto the grid of various types of electrode plates.

[0017] To achieve the fourth objective mentioned above, the present invention adopts the following technical solution:

[0018] A negative electrode plate is obtained by coating the negative electrode composition applicable to various types of electrode plates onto the grid of various types of electrode plates.

[0019] To achieve the fifth objective mentioned above, the present invention adopts the following technical solution:

[0020] A method for preparing a positive electrode plate and a negative electrode plate includes the following steps:

[0021] S1. Weigh the raw materials of the positive electrode composition applicable to multiple types of electrode plates and the negative electrode composition applicable to multiple types of electrode plates in the formula amounts respectively;

[0022] S2. First, stir the other raw materials in the positive electrode composition applicable to multiple types of electrode plates and the negative electrode composition applicable to multiple types of electrode plates, excluding dilute sulfuric acid and pure water, evenly.

[0023] S3. Quickly add pure water to the raw materials that are evenly mixed in S2, then slowly add dilute sulfuric acid while stirring continuously. Start the circulating air and the circulating water on the pot wall to reduce the temperature and ensure that the temperature does not exceed 65°C.

[0024] S4. The positive electrode composition applicable to multiple types of electrode plates and the negative electrode composition applicable to multiple types of electrode plates are respectively coated onto the grid of the multiple types of electrode plates to obtain the positive electrode plate and the negative electrode plate.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a positive electrode composition applicable to various types of electrode plates. Anisotropic graphite is added to the composition to increase the conductivity of the positive electrode and improve the internal or external formation effect of the electrode plate. Polyester short fibers are added to the composition to improve the bonding force between the compositions and with the grid. The prepared product is not easy to shed powder, lose paste, or deform.

[0027] (2) The present invention provides a negative electrode composition applicable to various types of electrode plates. Regardless of whether it is prepared by the original ordinary cooked electrode plate, the original dry-charged electrode plate, or the original electrode plate, the utilization rate of active material is high. It is easier to form into a raw electrode plate for internal use or into an ordinary cooked electrode plate externally. Adding an appropriate amount of stearic acid to the composition makes the negative electrode plate more resistant to oxidation.

[0028] (3) The electrical performance of batteries assembled from ordinary cooked electrode plates, dry-charged electrode plates, and native electrode plates produced using the positive and negative electrode compositions applicable to various types of electrode plates provided by this invention remains at a high level and shows a steady improvement. In particular, the charge acceptance and cycle life of dry-charged batteries are significantly improved. Using a single positive and negative electrode composition formula to produce electrode plates for multiple applications greatly simplifies production process management. Not only does the material cost remain unchanged, but the production process management cost and scrap rate are also greatly reduced. At the same time, the performance of batteries assembled using various process routes has not decreased but has actually improved. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this application clearer, the technical solution of this application will be clearly and completely described below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0030] Example 1: The positive electrode composition applicable to various types of electrode plates, the original ordinary cooked electrode plate, the original dry-charged electrode plate, and the original electrode plate formulation provided in this example are shown in Table 1.

[0031] Table 1

[0032]

[0033] Example 2: The negative electrode composition applicable to various types of electrode plates, the original ordinary cooked electrode plate, the original dry-charged electrode plate, and the original electrode plate formulation provided in this example are shown in Table 2.

[0034] Table 2

[0035]

[0036] Note: Columns marked with "*" indicate the negative electrode formulation: 0.05kg for general-purpose cooked and raw electrode plates, and 0.08kg for dry-charged electrode plates.

[0037] Example 3: This example provides a method for preparing a negative electrode composition applicable to multiple types of electrode plates. S1: According to the formulations of the positive and negative electrode compositions applicable to multiple types of electrode plates provided in Examples 1-2, weigh out the formula amounts of anisotropic graphite, polyester staple fiber, carbon black, humic acid, sodium lignosulfonate, and barium sulfate respectively and add them to the paste mixer. Stir them evenly for 2-4 minutes.

[0038] S2. Quickly add the amount of pure water in the formula to the paste mixer within 2 minutes, and then stir for 2-3 minutes, continuing to stir during the mixing process;

[0039] S3. Slowly add dilute sulfuric acid for 10-12 minutes, stirring continuously during the addition process. The temperature will gradually increase during the reaction. When the temperature reaches 55℃, start the circulating air and the circulating water on the pot wall to lower the temperature and ensure that the temperature does not exceed 65℃.

[0040] S4. After adding dilute sulfuric acid, continue stirring for 4 to 6 minutes to obtain a negative electrode composition suitable for various types of electrode plates. The temperature of the composition coming out of the paste mixer is 40 to 45°C.

[0041] Battery performance verification

[0042] Experimental Example 1: This experimental example provides a performance comparison between the battery assembled with ordinary refurbished plates provided in Examples 1 and 2 and the battery assembled with the original ordinary refurbished plates. The results are shown in Table 3.

[0043] Table 3

[0044]

[0045] As can be seen from the data in Table 3, compared with the battery assembled with the original ordinary cooked electrode plate, the battery assembled with the ordinary cooked electrode plate provided in Example 1 and Example 2 improved the low temperature high current discharge performance and cycle life of the battery, while its 10-hour rate capacity, room temperature high current and charge acceptance value did not change much.

[0046] Experimental Example 2: This experimental example provides a performance comparison of the internally formed battery assembled with ordinary green electrode plates and the battery assembled with native electrode plates provided in Examples 1 and 2. The results are shown in Table 4.

[0047] Table 4

[0048]

[0049] As can be seen from the data in Table 4, compared with the battery assembled with native electrode plates, the electrical performance of the internally formed batteries assembled with ordinary native electrode plates provided in Examples 1 and 2 has less change.

[0050] Experimental Example 3: This experimental example provides a performance comparison between the dry-charged battery assembled with dry-charged plates provided in Examples 1 and 2 and the battery assembled with the original dry-charged plates. The results are shown in Table 5.

[0051] Table 5

[0052]

[0053] As can be seen from the data in Table 5, compared with the original dry-charged electrode plate assembled battery, the dry-charged battery assembled with dry-charged electrode plates provided in Examples 1 and 2 improved the battery's high-current discharge performance at room temperature and low temperature and 10-hour rate capacity, its charge acceptance value improved significantly, its cycle life was increased by 50 times, and its dry-charge retention capacity also maintained an upward trend.

[0054] In summary, the electrical performance of batteries assembled from the original ordinary cooked electrode plate, the original dry-charged electrode plate, and the original electrode plate produced using the positive and negative electrode compositions applicable to various types of electrode plates provided by this invention remains at a high level and has a certain steady improvement. In particular, the charge acceptance and cycle life of dry-charged batteries have been significantly improved and enhanced.

[0055] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A battery, wherein the battery is a valve-regulated sealed type externally formed battery, internally formed battery, or dry-charged battery, characterized in that, The device includes a positive electrode plate and a negative electrode plate. The positive electrode plate is obtained by coating a positive electrode composition suitable for various types of electrode plates onto the grid of various types of electrode plates. The positive electrode composition suitable for various types of electrode plates includes 100 parts by weight of lead powder, 9-11 parts by weight of 1.400 g / ml dilute sulfuric acid, and 13-14 parts by weight of pure water. The positive electrode composition also includes 0.15-0.22 parts by weight of anisotropic graphite and 0.072-0.08 parts by weight of polyester staple fiber. The apparent specific gravity of the positive electrode composition suitable for various types of electrode plates is 4.25 ± 0.05 g / cm³. 3 The negative electrode plate is obtained by coating a negative electrode composition suitable for various types of electrode plates onto the grid of various types of electrode plates. The negative electrode composition suitable for various types of electrode plates includes 100 parts by weight of lead powder, 0.072–0.08 parts by weight of polyester staple fiber, 0.15–0.25 parts by weight of acetylene black, 0.35–0.52 parts by weight of humic acid, 0.09–0.12 parts by weight of sodium lignin sulfonate, 0.8–1.0 parts by weight of barium sulfate, 7.0–8.0 parts by weight of 1.400 g / ml dilute sulfuric acid, 0.04–0.09 parts by weight of stearic acid, and 11.5–12.5 parts by weight of pure water. The apparent specific gravity of the negative electrode composition suitable for various types of electrode plates is 4.35 ± 0.05 g / cm³. 3 ; The preparation method of the positive electrode plate or the negative electrode plate includes the following steps: S1, weighing the raw materials of the positive electrode composition and the negative electrode composition applicable to multiple types of electrode plates according to the formula; S2, stirring the other raw materials of the positive electrode composition and the negative electrode composition applicable to multiple types of electrode plates, excluding dilute sulfuric acid and pure water, separately until uniform; S3, quickly adding pure water to the uniformly mixed raw materials in S2, then slowly adding dilute sulfuric acid, continuously stirring, starting the circulating air and the circulating water of the pot wall to reduce the temperature, ensuring that the temperature does not exceed 65°C; S4, coating the positive electrode composition and the negative electrode composition applicable to multiple types of electrode plates onto the grid of the multiple types of electrode plates to obtain the positive electrode plate and the negative electrode plate.

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