What are the methods for battery repair technology?

For vulcanized batteries, you can first discharge the battery, pour out the original electrolyte and inject a relatively dilute electrolyte with a density below 1.10g/cm3, that is, add water to the battery to dilute the electrolyte to improve the solubility of lead sulfate. Use current below 20h, charge for a long time within the range of liquid temperature not exceeding 20℃～40℃, and finally adjust the electrolyte density in the battery to the standard solution concentration with a slightly higher electrolyte under the condition of full charge, general vulcanization phenomenon It can be relieved, and the capacity is restored to more than 80%, which can be considered as a successful repair. The mechanism of this method is to reduce the acid density to increase the solubility product of sulfate, and to charge with a small current for a long time to reduce the ohmic polarization to delay the early appearance of the water splitting voltage, and finally to gradually reduce the vulcanization phenomenon in the dissolution and conversion of active substances. Or eliminate. Shallow cycle charging method for vulcanized batteries, use high current within 5h, charge the battery to a slightly overcharged state, control the liquid temperature to not exceed 40 degrees, and then discharge 30%. Repeat this several times to reduce and eliminate the vulcanization phenomenon . The mechanism of this method is that the overcharged gas is used to slightly wash the surface of the electrode plate with sulfide salts, making it desorbed and dissolved and converted into active substances. Repair instrument repair Regarding vulcanized battery, some special pulse repair instrument can be used to charge and discharge the battery several times to eliminate vulcanization. The mechanism of this method, in terms of solid physics, any insulating layer can be broken down at a sufficiently high voltage. Once the insulating layer is broken down, it will change from an insulating state to a conductive state. If an instantaneous high voltage is applied to the sulfate layer with a large conductance difference resistance value, the large lead sulfate crystal can be broken down. If the high voltage is short enough and the current is limited, the charging current will not be caused by gas out of the battery when the sulfide layer is penetrated and the charging current is properly controlled. The amount of outgassing of the battery depends on the terminal voltage of the battery and the size of the charging current. If the pulse width is short enough and the duty cycle is large enough, the simultaneous micro-charging can be too late to form outgassing under the condition of ensuring the breakdown of the coarse lead sulfate crystals. If it contains negative pulse depolarization, it can better ensure that the gas of the electrode plate is separated when the sulfate layer is broken down, so that the pulse elimination sulfide is realized. Nano carbon sol battery activator repairing nano carbon sol is a type of nano carbon material. Nano-carbon materials refer to carbon materials with at least one dimension of less than 100 nm in the dispersed phase. Under the use of electric field, the active ingredients of the activator can solidify the electrode plate; disintegrate irreversible sulfate crystals; uniformly adsorb on the electrode plate surface to form a protective film to prevent the active material of the electrode plate from falling off and the electrode plate vulcanization, polarization, and lead branches The formation of crystallization; activate the active material of the battery; reduce the internal resistance of the battery and improve the electrochemical reaction of the battery. This type of repair fluid only has a better repair effect on the battery, and the repaired battery can be used for more than 12 months. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the purpose of the lithium-ion battery protection board?