Antipole repair method for irreversible vulcanization of 2V high-capacity lead-acid storage battery cathode
A technology for lead-acid batteries and batteries, which is applied in the repair/maintenance of secondary batteries. It can solve the problems of large positive plate damage, battery scrapping, and temperature rise of battery electrolyte, and achieve the effect of reducing corrosion.
Active Publication Date: 2013-09-04
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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Problems solved by technology
When the battery capacity drops by more than 60% and the serious vulcanization is serious, the existing method adopts the positive and negative electrode inversion, that is, the positive electrode is used as the negative electrode, and the negative electrode is used as the positive electrode to perform reverse charging. During the repair process, a large current passes through the plate, causing the temperature of the battery electrolyte to rise. If the temperature is too high, it will accelerate the softening and falling off of the positive electrode plate and the corrosion of the grid alloy, which will affect the later capacity and life of the positive electrode of the battery.
Usually, the reverse charging method can only perform a one-time repair due to the large damage to the positive plate. If the repair is unsuccessful, the battery will be scrapped
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[0025] (5) Fully charge the 2V large-capacity lead-acid battery to be desulfurized. Fully charge according to the battery manufacturer's requirements, or charge at a constant voltage of 2.4V until the current is stable for 5 hours, then it is considered fully charged.
[0026] (6) Discharge the battery at a discharge rate of 0.1C, and the termination voltage is 1.8V, and record the current capacity of the battery.
[0027] (7) figure 1 It is an embodiment of repairing the negative pole and reverse pole of the present invention. Add deionized water through the 4 exhaust port, and stop adding when the electrolyte liquid level of the 3 battery is 1.0 to 1.5 cm away from the 4 exhaust port. Place 1 auxiliary electrode in 3 battery electrolyte. The auxiliary electrode cannot touch the positive and negative plates of the battery, so as not to cause a short circuit. The positive pole of the battery charging instrument 8 is connected to the negative pole of the lead-acid battery 2...
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The irreversible vulcanizing of a 2V high-capacity lead-acid storage battery cathode is one of important reasons of battery failure. Large-particle lead sulfate has low activity and is difficult to form lead by reduction during charging. The invention relates to an antipole repair method, which removes vulcanization by converting the low-activity lead sulfate on the cathode into lead dioxide and reduces the lead dioxide into lead. Deionized water is added from an exhaust port 4, an auxiliary electrode 1 is arranged in electrolyte 3, an anode 8 of a storage battery charger is connected with the cathode 2 of the lead-acid storage battery, a cathode of the charger is connected with the auxiliary electrode 1, and thus, the low-activity lead sulfate on the cathode is removed by antipole repair.
Description
technical field [0001] The invention belongs to the technical field of lead-acid batteries. Background technique [0002] 2V large-capacity lead-acid batteries are widely used in solar photovoltaic power generation, wind power generation, communication power supply, power transmission and distribution system, railway, ship communication, UPS power supply and other fields. During battery operation, the irreversible sulfation of the negative electrode is one of the important failure modes. Under normal conditions, lead-acid batteries form lead sulfate crystals when they are discharged, and can be easily reduced to lead when they are charged. If the battery is used and maintained improperly, for example, it is often undercharged or overdischarged, a thick and hard lead sulfate recrystallization crystal will gradually form on the negative electrode. This lead sulfate crystal has low activity and low solubility, which increases the internal resistance of the battery. Large, the...
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IPC IPC(8): H01M10/42
CPCY02E60/12Y02E60/10
Inventor 裴锋李资荣王淑莉吴为康
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST