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Staged formation method for lead-acid storage battery

A technology of lead-acid battery and formation method, which is applied in the direction of lead-acid battery, construction of lead-acid battery, charging/discharging of secondary battery, etc., and can solve problems affecting low-temperature performance of battery, increase of electrolyte temperature, and decrease of formation efficiency, etc. Achieve the effects of avoiding excessive battery temperature rise, eliminating polarization, and reducing current heat generation

Active Publication Date: 2018-01-16
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing technology, continuous charging is usually used in the early stage of formation, but the battery will generate a lot of heat, resulting in an increase in the temperature of the electrolyte, loss of water, increase in the density of sulfuric acid, and a decrease in the formation efficiency. Moreover, the battery temperature is too high, which will affect the low temperature performance of the battery , on the other hand, if the temperature is too high, the resulting lead sulfate crystals are large, the polarization is large, and it is difficult to form

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 6-DZM-12 battery

[0036] The aciding temperature of the battery is 9°C, and the aciding density is 1.250g / ml. The acid is automatically added by a vacuum acid adding machine, the vacuum degree is 0.05MPa, and the vacuum is pumped 5 times.

[0037] After adding acid, put it in cooling water at 10°C, let it stand for 1 hour, and start charging. The water temperature is controlled at around 38°C.

[0038] Constant current charging current 2A-5A; pulse charging: positive pulse amplitude 2A-6A, pulse time 1s, negative pulse amplitude 2A-6A, pulse time 0.05s, intermittent time 0.15s. 0.5C constant current discharge.

[0039] The first stage: constant current 2A charge for 2h, constant current 3A charge for 2h, 6A pulse for 4h, 6A discharge for 0.5h.

[0040] The second stage: 6A pulse charge for 2.5h, constant current discharge for 0.75h.

[0041] The third stage: 6A pulse charge for 3h, constant current discharge for 1h.

[0042] The fourth stage: 6A pulse charge for ...

Embodiment 2

[0051] 6-DZM-12 battery

[0052] The treatment before chemical conversion is the same as in Example 1.

[0053] Constant current charging current 2A-5A; pulse charging: positive pulse amplitude 2A-8A, pulse time 1s, negative pulse amplitude 2A-8A, pulse time 0.1s, intermittent time 0.2s. 0.5C constant current discharge.

[0054] The first stage: constant current 2A charge for 2h, constant current 3A charge for 2h, 8A pulse for 4h, 6A discharge for 0.5h.

[0055] The second stage: 8A pulse charge for 2.5h, constant current discharge for 0.75h.

[0056] The third stage: 8A pulse charge for 3h, constant current discharge for 1h.

[0057] The fourth stage: 8A pulse charge for 3h, constant current discharge for 1.3h.

[0058] The fifth stage: 8A pulse charge for 3.5h, constant current discharge for 1.75h.

[0059] The sixth stage: 8A pulse charging for 5h, 3.6A pulse charging for 2h, 2.4A pulse charging for 2h, 6A constant current discharge for 2h.

[0060] The seventh stage:...

Embodiment 3

[0065] 6-DZM-20 battery

[0066] The aciding temperature of the battery is 9°C, and the aciding density is 1.250g / ml. The acid is automatically added by a vacuum acid adding machine, the vacuum degree is 0.05MPa, and the vacuum is pumped 5 times.

[0067] After adding acid, put it in a cooling water bath, let it stand for 1.5h, and start charging. The water temperature is controlled at around 32°C.

[0068] Constant current charging current 2A-6A, pulse charging, positive pulse amplitude 4A-10A, pulse time 2s, negative pulse amplitude 4A-10A, pulse time 0.1s, intermittent time 0.1s. 0.5C constant current discharge.

[0069] The first stage: constant current 3A charge 2h, constant current 5A charge 2h, 10A pulse 4h, 6A discharge 0.5h.

[0070] The second stage: 10A pulse charge for 2.5h, constant current discharge for 0.75h.

[0071] The third stage: 10A pulse charge for 3h, constant current discharge for 1h.

[0072] The fourth stage: 10A pulse charge for 3.5h, constant ...

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Abstract

The invention discloses a staged formation method for a lead-acid storage battery, and belongs to the technical field of production of lead-acid storage batteries. The staged formation method comprises the following stages: 1, charging the storage battery until the voltage reaches 2.75-2.9 V / bar, and discharging the storage battery to reach a final voltage; 2, carrying out positive and negative pulse formation charging until the voltage of the storage battery reaches 2.75-2.9 V / bar, discharging the storage battery to reach the final voltage, and repeating the process multiple times; 3, carrying out positive and negative pulse formation charging step by step in an amplitude decreasing manner until the electrolyte density of the storage battery reaches a preset standard, and discharging thestorage battery to reach the final voltage; and 4, charging the storage battery until the voltage of the storage battery is stable. The method shortens the formation time to 44 h and improves the formation efficiency by 50% or more. A formed pole plate has a compact structure and a good strength, and the 100% DOD cycle life of the battery is 450 times or more, and is 20% or more longer than the life of common batteries.

Description

technical field [0001] The invention relates to the technical field of preparation of lead-acid batteries, in particular to a step-by-step formation method of lead-acid batteries. Background technique [0002] At present, lead-acid batteries are still one of the most widely used batteries, and formation is an important step in the manufacturing process of lead-acid batteries. The quality of formation directly affects the performance of lead-acid batteries, and the power consumption in the formation process is huge. of. [0003] During the formation of lead-acid batteries, additives can be added to the formation plate or lead paste. If the additive is used properly, the electrochemical reaction in the formation process can be accelerated and the plate formation effect will be better. In addition to additives, the structure of the plate grid can also be improved. There is a grid with a carbon honeycomb structure, which can improve the formation effect; the use of ultrasonic w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/12
CPCY02E60/10Y02P70/50
Inventor 李进兴姚秋实李鹏侯国友方明学高根芳代飞周文渭陈林毛锦敏
Owner TIANNENG BATTERY GROUP
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