Formation and activation process of lead-acid battery for communication

Abstract

The application relates to a lead-acid battery formation and activation method for communication, which comprises the following steps: placing a lead-acid battery filled with electrolyte in a circulating water bath, cooling to below 40 DEG C, and carrying out charging and discharging. The application improves the charging efficiency, shortens the battery formation time, improves the initial capacity and the cycle service life of the battery, and has important significance for the production of the battery.

Description

Technical Field

[0001] This invention relates to the field of valve-regulated sealed lead-acid batteries, and particularly to a method for the formation and activation of lead-acid batteries for communication applications. Background Technology

[0002] Communication batteries typically have thicker internal positive and negative plates, resulting in lower formation efficiency. Furthermore, for ease of production and environmental friendliness, they generally employ an internal formation process involving multiple charge-discharge cycles. Compared to traditional external formation processes, internal formation with multiple charge-discharge cycles produces less environmental pollution, but the formation charging cycle is relatively long, formation consistency is poor, and production efficiency is low.

[0003] Therefore, research on reducing battery formation process time is essential in order to improve production efficiency, simplify production processes, and reduce unit energy consumption of products. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a formation and activation method for lead-acid batteries for communication that shortens the time required for internal formation and improves production efficiency.

[0005] The technical solution to achieve the purpose of this invention is: a method for forming and activating a lead-acid battery for communication, comprising the following steps: placing a lead-acid battery filled with electrolyte in a circulating water bath, wherein the temperature of the sulfuric acid in the lead-acid battery drops below 40°C, and charging and discharging are performed, the specific charging and discharging process being as follows:

[0006] (1) After the battery is filled with acid, let it stand for 1.5 to 2.5 hours;

[0007] (2) Charge at 0.05C10 to 0.06C10 for 3 to 4 hours;

[0008] (3) Charge at 0.12C10 to 0.14C10 for 35 to 45 hours;

[0009] (4) Charge at 0.05C10 to 0.08C10 for 5 to 10 hours;

[0010] (5) Let stand for 0.5 to 1.0 hours;

[0011] (6) Discharge at 0.1C10 to 0.15C10 until the average cell voltage is 1.8V;

[0012] (7) Charge at 0.10C10 to 0.15C10 for 8 to 10 hours;

[0013] (8) Charge at 0.05C10 to 0.1C10 for 24 to 40 hours;

[0014] C10 represents the rated capacity of the lead-acid battery;

[0015] The electrolyte is sulfuric acid with a density of 1.150–1.250 g / cm³.

[0016] During the charging and discharging process, the temperature of the battery is less than 50°C.

[0017] The above technical solution is characterized in that the density of the sulfuric acid is 1.240 g / cm3.

[0018] The lead-acid battery described in the above technical solution is a valve-regulated GFM series.

[0019] The temperature of the battery described in the above technical solution is 25-40℃.

[0020] The charging and discharging process described in the above technical solution is as follows:

[0021] (1) After the battery is filled with acid, let it stand for 2 hours;

[0022] (2) Charge at 0.05C10 for 3 hours;

[0023] (3) Charge at 0.13C10 for 40 hours;

[0024] (4) Charge at 0.06C10 for 5.5 hours;

[0025] (5) Let stand for 0.5 hours;

[0026] (6) Discharge at 0.12C10 to an average cell voltage of 1.8V;

[0027] (7) Charge at 0.13C10 for 10 hours;

[0028] (8) Charge at 0.07C10 for 28 hours.

[0029] After adopting the above technical solution, the present invention has the following positive effects:

[0030] (1) The lead-acid battery internal formation method of the present invention increases the charging current in the middle stage of charging, which can reduce the charging and discharging time of the whole stage and improve the charging and discharging efficiency.

[0031] (2) The present invention increases the charging current, making the formed positive electrode active material more uniform and dense, which is beneficial to improving the battery life and initial battery capacity of the lead-acid battery after formation. Attached Figure Description

[0032] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0033] Figure 1This is a comparison chart of the cycle capacity of various embodiments of the lead-acid battery of the present invention. Detailed Implementation

[0034] Example 1

[0035] The lead-acid battery used is a GFM-500. Other operations are the same as in Implementation 1. The specific charging and discharging process is as follows:

[0036] (1) After the battery is filled with acid, let it stand for 2 hours;

[0037] (2) Charge at 0.05C10 for 3 hours;

[0038] (3) Charge at 0.13C10 for 40 hours;

[0039] (4) Charge at 0.06C10 for 5.5 hours;

[0040] (5) Let stand for 0.5 hours;

[0041] (6) Discharge at 0.12C10 to an average cell voltage of 1.8V;

[0042] (7) Charge at 0.13C10 for 10 hours;

[0043] (8) Charge at 0.07C10 for 28 hours;

[0044] C10 represents the rated capacity of the lead-acid battery.

[0045] This embodiment accelerates the electrochemical reaction rate on the plates by increasing the charging current during the high-current stage, thereby improving the formation efficiency of the lead-acid battery and shortening the formation time.

[0046] The cycle life of the lead-acid battery after formation was determined according to the standard method of GB / T799-2008, and the initial capacity of the lead-acid battery was determined according to the 10-hour capacity test method. The results are recorded in Table 1.

[0047] Example 2

[0048] The lead-acid battery used is a GFM-500 model. Other operations are the same as in Implementation 1. The specific charging and discharging process is as follows:

[0049] (1) After the battery is filled with acid, let it stand for 2 hours.

[0050] (2) Charge at 0.06C10 for 4 hours;

[0051] (3) Charge at 0.12C10 for 30 hours;

[0052] (4) Charge at 0.08C10 for another 10 hours;

[0053] (5) Let stand for 1 hour

[0054] (6) Discharge again at 0.1C10 until the average cell voltage is 1.8V.

[0055] (7) Charge at 0.15C10 for another 10 hours;

[0056] (8) Charge at 0.1C10 for 28 hours;

[0057] The cycle life of the lead-acid battery after formation was determined according to the standard method of GB / T799-2008, and the initial capacity of the lead-acid battery was determined according to the 10-hour capacity test method. The results are recorded in Table 1.

[0058] Example 3

[0059] The lead-acid battery used is a GFM-500, with other parameters the same as in Implementation 1. The specific charging and discharging process is as follows:

[0060] (1) After the battery is filled with acid, let it stand for 2 hours.

[0061] (2) Charge at 0.05C10 for 4 hours;

[0062] (3) Charge at 0.14C10 for 35 hours;

[0063] (4) Charge at 0.06C10 for another 9 hours;

[0064] (5) Let stand for 1 hour;

[0065] (6) Discharge again with 0.12C10 until the average cell voltage is 1.8V.

[0066] (7) Charge at 0.13C10 for another 10 hours;

[0067] (8) Charge at 0.05C10 for another 40 hours;

[0068] The cycle life of the lead-acid battery after formation was determined according to the standard method of GB / T799-2008, and the initial capacity of the lead-acid battery was determined according to the 10-hour capacity test method. The results are recorded in Table 1.

[0069] Comparative Example

[0070] The lead-acid battery used in the existing charging process is model GFM-500, with other parameters the same as in Implementation 1. The specific charging and discharging process is as follows:

[0071] (1) After the battery is filled with acid, let it stand for 2 hours.

[0072] (2) Charge at 0.04C10 for 4 hours;

[0073] (3) Charge at 0.12C10 for 40 hours;

[0074] (4) Charge at 0.05C10 for another 8 hours;

[0075] (5) Discharge at 0.1C10 for 7 hours;

[0076] (6) Charge at 0.12C10 for 8 hours;

[0077] (7) Charge at 0.06C10 for 36 hours;

[0078] (8) Let stand for 1 hour;

[0079] (9) Discharge again with 0.1C10 until the average cell voltage is 1.8V.

[0080] (10) Charge at 0.11C10 for 10 hours;

[0081] (11) Charge at 0.05C10 for 4 hours;

[0082] (12) Charge with 0.025C10 for 5 hours.

[0083] The cycle life of the lead-acid battery after formation was determined according to the standard method of GB / T799-2008, and the initial capacity of the lead-acid battery was determined according to the 10-hour capacity test method. The results are recorded in Table 1.

[0084] Loop count Example 1 Example 2 Example 3 Comparative Example Initial capacity (Ah) 556.6 527.475 540.723 549.9 Conversion into charge (C) 8.94 8.94 8.94 9.9 Conversion time (h) 97 93 109 135

[0085] Table 1 Comparison of performance parameters of lead-acid batteries

[0086] From Table 1 and Figure 1 It can be seen that the battery obtained by the internal formation method of the present invention has the highest initial capacity, and the formation charge is lower than that of the comparative example (current process), the formation time is shorter, and the lifespan is significantly higher than that of the battery obtained by the internal formation method of the prior art.

[0087] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of formation and activation of a lead-acid battery for communication, characterized in that: It comprises the following steps: The lead-acid battery filled with electrolyte is placed in a circulating water bath, the temperature of sulfuric acid in the lead-acid battery is reduced to below 40℃, and the charging and discharging is carried out, the specific charging and discharging process is as follows: (1) The battery is rested for 2 hours after acid injection; (2) 0.05C10 charging for 3 hours; (3) 0.13C10 charging for 40 hours; (4) 0.06C10 charging for 5.5 hours; (5) Resting for 0.5 hours; (6) 0.12C10 discharging to an average single cell voltage of 1.8V; (7) 0.13C10 charging for 10 hours; (8) 0.07C10 charging for 28 hours; Wherein, C10 represents the rated capacity of the lead-acid battery; The electrolyte is sulfuric acid with a density of 1.150-1.250g / cm3; During the charging and discharging process, the temperature of the battery is less than 50℃; The model of the lead-acid battery is valve-regulated GFM series.

2. The method of claim 1, wherein: The density of the sulfuric acid is 1.240g / cm3.

3. A method of formation of a lead-acid battery as claimed in claim 1, characterised in that, The temperature of the battery is 25-40℃.

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