Container formation process for lead-carbon battery

Abstract

The invention relates to the technical field of battery production, in particular to a lead-carbon battery container formation process which comprises the following steps: firstly, preparing a gel electrolyte additive; secondly, a reasonable container formation battery process (five-charging and four-discharging) is adopted; and finally, reasonable circulating water temperature is adopted, so that the consistency of the battery capacity is ensured. By adopting a unique container formation process, the container formation difficulty is reduced, the container formation efficiency of the lead-carbon battery is improved, meanwhile, the cost is saved, and the product quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery internal formation, and in particular relates to a high-power lead-carbon battery internal formation process. Background Art

[0002] A new type of 12V high-rate battery developed specifically for data centers, UPS systems and power systems. The product uses a special corrosion-resistant alloy, a unique formula design, a larger plate surface area than ordinary batteries, a proprietary colloidal electrolyte additive and a combined labyrinth pole sealing technology.

[0003] In the past, the internal formation of lead-carbon battery plates mostly used the external formation process. As the country's requirements for environmental protection and labor protection become increasingly higher, the external formation process of the plates has been cancelled, and all plates are required to be produced using the internal formation process. This technology reduces the difficulty of the internal formation of lead-carbon battery plates by changing the internal formation conditions, optimizing the internal formation process, and adding glue, making the internal formation process more reasonable, reducing pollution to the environment, improving product quality, and reducing production costs. Summary of the invention

[0004] The main purpose of the present invention is to solve the deficiencies in the prior art and to provide a high-power lead-carbon battery internal formation process, which can effectively solve the problems in the above-mentioned background technology.

[0005] To achieve the above technology, the present invention provides the following technical solutions:

[0006] A lead-carbon battery internal formation process is characterized in that, before the internal formation, a colloidal electrolyte is prepared, and a colloidal electrolyte additive is added into the lead-carbon battery and stirred evenly.

[0007] Furthermore, the colloidal electrolyte additive includes the following components in weight percentage of the colloidal electrolyte: 0.1-1.5% phosphoric acid, 2-2.3% sodium sulfate, 0.17-2.5% stannous sulfate, and 2-3.5% silicon dioxide.

[0008] Furthermore, the density of the colloidal electrolyte is 1.225 g / cm 3 .

[0009] Furthermore, the lead-carbon battery to which the colloidal electrolyte is added is charged and formed, and the charging and formation system is five charges and four discharges.

[0010] Preferably, the five-charge and four-discharge charging formation system is as follows:

[0011] (1) First charging stage: charge at 0.07C for 3 hours, then charge at 0.12C for 12 hours;

[0012] (2) A static phase: interrupt the connection and let it stand for 1 hour;

[0013] (3) First discharge stage: charge at -0.1C rate for 3h;

[0014] (4) Second charging stage: charge at 0.12C rate for 16 hours, then charge at 0.10C rate for 7 hours;

[0015] (5) Second static stage: interrupt the connection and let it stand for 1 hour;

[0016] (6) Second discharge stage: charge at -0.1C rate for 4h;

[0017] (7) Three charging stages: charging at 0.12C for 16 hours, then charging at 0.10C for 7 hours;

[0018] (8) Three-quiet stage: interrupt the connection and let it stand for 1 hour;

[0019] (9) Third discharge stage: charge at -0.1C rate for 4h;

[0020] (10) Four charging stages: charging at 0.12C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h;

[0021] (11) Four static stages: interrupt the connection and let it stand for 2 hours, then draw acid to level it;

[0022] (12) Five static phases: disconnect and wait for 2 hours, then perform capacity test:

[0023] (13) Five charging stages: charging at 0.10C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h;

[0024] (14) Five static stages: interrupt the connection and let it stand for 24 hours, then cap and remove from production line;

[0025] As another preferred option,

[0026] (15) First charging stage: charge at 0.09C for 3 h, then charge at 0.12C for 12 h;

[0027] (16) 1st static stage: interrupt the connection and let it stand for 1 hour;

[0028] (17) First discharge stage: charge at -0.1C rate for 3h;

[0029] (18) Second charging stage: charge at 0.15C for 16 hours, then charge at 0.10C for 7 hours;

[0030] (19) Second static stage: interrupt the connection and let it stand for 1 hour;

[0031] (20) Second discharge stage: charge at -0.1C rate for 4h;

[0032] (21) Three charging stages: charging at 0.15C for 16 h, then charging at 0.10C for 7 h;

[0033] (22) Three-quiet stage: interrupt the connection and let it stand for 1 hour;

[0034] (23) Third discharge stage: charge at -0.1C rate for 4h;

[0035] (24) Four charging stages: charging at 0.15C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h;

[0036] (25) Fourth static stage: interrupt the connection and let it stand for 2 hours, then draw acid to level it;

[0037] (26) Five static phases: interrupt the connection and let it rest for 2 hours, then perform capacity testing;

[0038] (27) Five charging stages: charging at 0.12C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h;

[0039] (28) Five static stages: interrupt the connection and let it stand for 24 hours, then cap and remove from production line;

[0040] Preferably, the charging formation is cooled by circulating water, and the circulating water temperature is ≤25°C.

[0041] Compared with the existing technology, the present invention adopts a lower density electrolyte under the condition of different formula additives, and maintains a circulating water flow of ≤25°C in the process, which is beneficial to ensure the improvement of the internal formation efficiency of the lead-carbon battery (6-PbC-180) to avoid affecting the performance.

[0042] The technical effects of the present invention are as follows:

[0043] (1) Different from the existing lead-carbon battery internal formation process, the present invention adopts a higher charge and discharge rate than the original process at 1.235g / cm 3 Lower low density electrolyte 1.225g / cm 3 ; Under low-density electrolyte, the battery formation process uses a lower low-density electrolyte, which makes the conversion of internalized active substances easier, reduces the difficulty of internalization, and improves the efficiency of internalization. When the internal resistance of the battery is small, the charging current can be increased, thereby shortening the formation time, and also saving the electric energy consumed by internalization. The charge and discharge acceptance of the lead-carbon battery is matched, which, on the one hand, maximizes the conversion efficiency of internalized active substances and makes the battery fully permeable, and on the other hand, is conducive to the generation of α-PbO 2 , thereby increasing α-PbO2 With β-PbO 2 ratio, improving the battery cycle life.

[0044] (2) In the second stage of the plate formation process of the present invention, a rich liquid pot is used in the formation process to inject acid at one time (no acid replenishment is required during the formation process), thereby improving the consistency of battery formation efficiency, reducing the labor intensity of workers in the formation process, and saving labor costs in the formation process.

[0045] (3) The present invention verifies that the circulating water temperature is ≤25°C (the actual measured water temperature is 30°C) during the lead-carbon battery formation process, and the circulating water remains flowing, thereby improving the conversion efficiency of the plate active material, and the battery plastic shell can achieve the result of not being deformed, thereby improving the product quality.

[0046] (4) The additive of Fengri colloidal electrolyte of the present invention includes silicon dioxide. When phosphoric acid is added to the colloidal electrolyte of the battery, the softening speed of PbO, the active material of the positive electrode of the battery, and its shedding can be reduced, thereby improving the cycle life of the battery, and also reducing the sulfation of the plate when the battery is left alone after deep discharge. Adding sodium sulfate and stannous sulfate to the colloidal electrolyte of the battery has a good inhibitory effect on the generation of sulfation of the battery. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] Example 1

[0049] A lead-carbon battery internal formation process, before internal formation, first prepare a colloidal electrolyte, add a colloidal electrolyte additive into the lead-carbon battery, and stir evenly. The colloidal electrolyte additive includes the following components in weight percentage of the colloidal electrolyte: 0.1% phosphoric acid, 2% sodium sulfate, 0.17% stannous sulfate, and 2% silicon dioxide. The density of the colloidal electrolyte is 1.225g / cm 3 .

[0050] The lead-carbon battery to which the colloidal electrolyte is added is charged and formed, and the charging and forming system is five-charge and four-discharge. The five-charge and four-discharge charging and forming system is as follows:

[0051] (1) First charging stage: charge at 0.07C for 3 hours, then charge at 0.12C for 12 hours;

[0052] (2) A static phase: interrupt the connection and let it stand for 1 hour;

[0053] (3) First discharge stage: charge at -0.1C rate for 3h;

[0054] (4) Second charging stage: charge at 0.12C rate for 16 hours, then charge at 0.10C rate for 7 hours;

[0055] (5) Second static stage: interrupt the connection and let it stand for 1 hour;

[0056] (6) Second discharge stage: charge at -0.1C rate for 4h;

[0057] (7) Three charging stages: charging at 0.12C for 16 hours, then charging at 0.10C for 7 hours;

[0058] (8) Three-quiet stage: interrupt the connection and let it stand for 1 hour;

[0059] (9) Third discharge stage: charge at -0.1C rate for 4h;

[0060] (10) Four charging stages: charging at 0.12C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h;

[0061] (11) Four static stages: interrupt the connection and let it stand for 2 hours, then draw acid to level it;

[0062] (12) Five static phases: interrupt the connection and let it rest for 2 hours, then perform capacity testing;

[0063] (13) Five charging stages: charging at 0.10C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h;

[0064] (14) Five static stages: interrupt the connection and let it stand for 24 hours, then cap and remove from production line;

[0065] During the charging and forming process, circulating water cooling is adopted, and the circulating water temperature is ≤25°C.

[0066] Example 2

[0067] A lead-carbon battery internal formation process comprises the following steps: before internal formation, a colloidal electrolyte is prepared, and a colloidal electrolyte additive is added to the lead-carbon battery and stirred evenly. The colloidal electrolyte additive comprises the following components: 1.5% phosphoric acid, 2.3% sodium sulfate, 2.5% stannous sulfate, and 3.5% silicon dioxide. The above percentages are the percentages of each component in the total weight of the colloidal electrolyte. The density of the colloidal electrolyte is 1.225 g / cm 3 .

[0068] The lead-carbon battery to which the colloidal electrolyte is added is charged and formed, and the charging and forming system is five-charge and four-discharge. The five-charge and four-discharge charging and forming system is as follows:

[0069] (1) First charging stage: charge at 0.09C for 3 hours, then charge at 0.12C for 12 hours;

[0070] (2) A static phase: interrupt the connection and let it stand for 1 hour;

[0071] (3) First discharge stage: charge at -0.1C rate for 3h;

[0072] (4) Second charging stage: charge at 0.15C for 16 hours, then charge at 0.10C for 7 hours;

[0073] (5) Second static stage: interrupt the connection and let it stand for 1 hour;

[0074] (6) Second discharge stage: charge at -0.1C rate for 4h;

[0075] (7) Three charging stages: charging at 0.15C for 16 hours, then charging at 0.10C for 7 hours;

[0076] (8) Three-quiet stage: interrupt the connection and let it stand for 1 hour;

[0077] (9) Third discharge stage: charge at -0.1C rate for 4h;

[0078] (10) Four charging stages: charging at 0.15C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h;

[0079] (11) Four static stages: interrupt the connection and let it stand for 2 hours, then draw acid to level it;

[0080] (12) Five static phases: interrupt the connection and let it rest for 2 hours, then perform capacity testing;

[0081] (13) Five charging stages: charging at 0.12C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h;

[0082] (14) Five static stages: interrupt the connection and let it stand for 24 hours, then cap and remove from production line;

[0083] During the charging and forming process, circulating water cooling is adopted, and the circulating water temperature is ≤25°C.

Claims

1. A lead-carbon battery internal formation process, characterized in that: Before internalization, prepare the colloidal electrolyte first, add the colloidal electrolyte additive into the lead-carbon battery, and stir evenly.

2. A lead-carbon battery internal formation process according to claim 1, characterized in that: The colloidal electrolyte additive comprises the following components in weight percentage of the colloidal electrolyte: 0.1-1.5% phosphoric acid, 2-2.3% sodium sulfate, 0.17-2.5% stannous sulfate, and 2-3.5% silicon dioxide.

3. A lead-carbon battery internal formation process according to claim 1, characterized in that: The density of the colloidal electrolyte is 1.225 g / cm 3 .

4. A lead-carbon battery internal formation process according to claim 1, characterized in that: The lead-carbon battery added with colloidal electrolyte is charged and formed, and the charging and formation system is five charges and four discharges.

5. A lead-carbon battery internal formation process according to claim 4, characterized in that: The five-charge and four-discharge charging formation system is as follows: (1) First charging stage: charge at 0.07C for 3 hours, then charge at 0.12C for 12 hours; (2) A static phase: interrupt the connection and let it stand for 1 hour; (3) First discharge stage: charge at -0.1C rate for 3h; (4) Second charging stage: charge at 0.12C rate for 16 hours, then charge at 0.10C rate for 7 hours; (5) Second static stage: interrupt the connection and let it stand for 1 hour; (6) Second discharge stage: charge at -0.1C rate for 4h; (7) Three charging stages: charging at 0.12C for 16 hours, then charging at 0.10C for 7 hours; (8) Three-quiet stage: interrupt the connection and let it stand for 1 hour; (9) Third discharge stage: charge at -0.1C rate for 4h; (10) Four charging stages: charging at 0.12C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h; (11) Four static stages: interrupt the connection and let it stand for 2 hours, then draw acid to level it; (12) Five static phases: disconnect and wait for 2 hours, then perform capacity test: (13) Five charging stages: charging at 0.10C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h; (14) Five static stages: interrupt the connection and let it stand for 24 hours, then seal and remove from production line.

6. A lead-carbon battery internal formation process according to claim 4, characterized in that: The five-charge and four-discharge charging formation system is as follows: (1) First charging stage: charge at 0.09C for 3 hours, then charge at 0.12C for 12 hours; (2) A static phase: interrupt the connection and let it stand for 1 hour; (3) First discharge stage: charge at -0.1C rate for 3h; (4) Second charging stage: charge at 0.15C for 16 hours, then charge at 0.10C for 7 hours; (5) Second static stage: interrupt the connection and let it stand for 1 hour; (6) Second discharge stage: charge at -0.1C rate for 4h; (7) Three charging stages: charging at 0.15C for 16 hours, then charging at 0.10C for 7 hours; (8) Three-quiet stage: interrupt the connection and let it stand for 1 hour; (9) Third discharge stage: charge at -0.1C rate for 4h; (10) Four charging stages: charging at 0.15C for 16 h, then at 0.10C for 7 h, and finally at 0.04C for 11 h; (11) Four static stages: interrupt the connection and let it stand for 2 hours, then draw acid to level it; (12) Five static phases: interrupt the connection and let it rest for 2 hours, then perform capacity testing; (13) Five charging stages: charging at 0.12C for 8 h, then at 0.05C for 10 h, and finally at a constant voltage of 2.25 V for 4 h; (14) Five static stages: interrupt the connection and let it stand for 24 hours, then seal and remove from production line.

7. A lead-carbon battery internal formation process according to claim 4, characterized in that: The charging and formation is cooled by circulating water, and the circulating water temperature is ≤25°C.