阅读说明：本技术 一种铅酸蓄电池的制造方法 (Method for manufacturing lead-acid storage battery ) 是由 杨新新 周刚 程志明 于 2020-01-19 设计创作，主要内容包括：本发明涉及一种蓄电池的制造方法,包括如下步骤：步骤1：向铅酸蓄电池中加入第一密度硫酸溶液；步骤2,通电完全化成；步骤3,向电池中加入第二密度硫酸溶液,通电,所述第二密度硫酸溶液的密度大于所述第一密度硫酸溶液的密度。本发明的一种蓄电池的制造方法,即保证电池寿命同时也可以满足容量的要求,另外也能提高化成效率、节约能源、为生产不同容量的电池提供了更大的便利。(The invention relates to a method for manufacturing a storage battery, which comprises the following steps: step 1: adding a first density sulfuric acid solution into a lead-acid storage battery; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery, and electrifying, wherein the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution. The manufacturing method of the storage battery can not only ensure the service life of the battery, but also meet the capacity requirement, and can also improve the formation efficiency, save energy and provide greater convenience for producing batteries with different capacities.)

1. A method for manufacturing a lead-acid battery, characterized by comprising the steps of: step 1: adding a first density sulfuric acid solution into a lead-acid storage battery; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery, and electrifying, wherein the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution.

2. The method of claim 1, wherein the first density sulfuric acid solution has a density of 1.04g/cm 3-1.28 g/cm3, and the second density sulfuric acid solution has a density of 1.25-1.6 g/cm 3.

3. The method for manufacturing a lead-acid storage battery according to claim 1 or 2, wherein the lead-acid storage battery comprises a separator, and in the step 1, the acid absorption amount of the separator of the lead-acid storage battery is in an unsaturated state.

Technical Field

The invention relates to the field of lead-acid storage batteries.

Background

In the process of manufacturing the lead-acid storage battery, the process of forming the polar plate is required, and the internal formation methods widely adopted by the existing valve-regulated lead-acid storage battery (VRLAB) have the defects of low formation efficiency, long time, high energy consumption, short service life and the like.

The formation of the internal formation battery is completed under the condition of high H2SO4 concentration, although the battery capacity can meet the requirement, a large amount of HSO 4-ions are adsorbed in a gel region of PbO2 particles, SO that an active center of an electrochemical reduction reaction of PbO2 is blocked, and therefore, the electrode capacity is attenuated. Meanwhile, the skeleton structure of the positive active material is difficult to form under the condition of high-concentration sulfuric acid, so that the positive active material falls off and becomes sludge in circulation, and the service life of the battery is shortened.

The conventional formation process is formed in a high-density acid environment, and the framework structure of the positive active material is difficult to form due to the over-strong acid environment. And the conventional formation process is in a rich liquid state, the saturation of the partition plate is too high, the water decomposition in the formation process is serious, and the energy consumption is high.

Because the conventional internal formation process has the defects, the development of the internal formation process for the battery with high capacity and long service life is a problem to be solved urgently in the industry of the lead-acid storage battery.

Disclosure of Invention

In order to solve the technical problem, the invention provides a method for manufacturing a storage battery, which comprises the following steps: step 1: adding a first density sulfuric acid solution into a lead-acid storage battery; step 2, electrifying to complete formation; and 3, adding a second density sulfuric acid solution into the battery, and electrifying, wherein the density of the second density sulfuric acid solution is greater than that of the first density sulfuric acid solution.

Furthermore, the density of the first density sulfuric acid solution is between 1.04g/cm3 and 1.28g/cm3, and the density of the second density sulfuric acid solution is between 1.25 and 1.6g/cm 3.

Further, the lead-acid storage battery comprises a separator, and in the step 1, the acid absorption amount of the separator of the lead-acid storage battery is in an unsaturated state.

After the formation of the battery is finished, the manufacturing method of the invention can ensure the service life of the battery and meet the requirement of capacity, in addition, the formation efficiency can be improved, the energy can be saved, and the invention provides more convenience for producing batteries with different capacities.

Drawings

FIG. 1 is a graph showing cycle life curves of examples 1 to 4 of the present invention and comparative example 1.

Detailed Description

The invention is further described with reference to specific examples.

The manufacturing method of the storage battery comprises the following steps: step 1, adding a sulfuric acid solution with a first density into a lead-acid storage battery to be formed, wherein the first density is preferably 1.04g/cm 3-1.28 g/cm3, and selecting a proper density sulfuric acid solution according to the requirements of field actual conditions on a production field, for example, adding a sulfuric acid solution with a density of 1.05-1.15 g/cm3 to obtain a battery with relatively high service life requirement and relatively low capacity requirement after formation is finished; the method comprises the steps of obtaining a battery with relatively low service life requirement and relatively high capacity requirement after formation is finished, adding 1.16-1.28 g/cm3 sulfuric acid solution, wherein the volume of the added sulfuric acid solution can be 70% -110%, preferably 70% -99% of the saturated acid absorption amount of a lead storage battery partition plate, and when the acid absorption amount in the formation process is lower than 100%, namely the acid absorption amount of the lead storage battery partition plate is in an unsaturated state, the battery enters a barren solution state, an oxygen composite channel is opened, and oxygen circulation starts, so that the formation efficiency can be greatly improved, water loss is reduced, electric energy is saved, the formation time is shortened, and the production efficiency is improved; step 2, electrifying to complete formation; in the formation process, the sulfuric acid solution with the first density is used as a medium to participate in the formation reaction, and after the formation is completed, namely after the basic lead sulfate and the lead oxide are converted, the battery with the formation completed has a longer service life; and 3, adding a sulfuric acid solution with a second density into the battery after the formation is finished, wherein the second density is preferably 1.25-1.6 g/cm3(25 ℃), because the capacity of the sulfuric acid solution with the first density after the formation is low, in order to achieve the required battery capacity, the density of the sulfuric acid solution with the second density is required to be higher than that of the sulfuric acid solution with the first density, and the sulfuric acid solution with the second density is used for mixing with the acid after the formation of the battery so as to be regulated into the actually required sulfuric acid with a specific concentration. And 4, finishing the formation, and extracting free acid if the battery saturation is higher than 100%. The first addition of the low-density sulfuric acid solution can be 1 addition of the low-density sulfuric acid solution or multiple additions of the low-density sulfuric acid solution, and when the low-density sulfuric acid solution is added multiple times, the volume of the low-density sulfuric acid solution added at the next time is preferably larger than that of the low-density sulfuric acid solution added at the previous time. The second addition of the high-density sulfuric acid solution can be 1 addition of the high-density sulfuric acid solution or multiple additions of the high-density sulfuric acid solution, and when the high-density sulfuric acid solution is added multiple times, the volume of the high-density sulfuric acid solution added at the next time is preferably smaller than that of the high-density sulfuric acid solution added at the previous time.