Electric vehicle battery repair method

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Vulcanization is that the battery will occur during the charge and discharge process, especially when the large current discharge is more severe. For example, 10AH battery, if more than 10A current is discharged, more sulfate particles appear on the plate material, the current use conditions and charging mode are irreversible, extending over time, such particles It will accumulate on the plate material. Since such particles are not electrically conductive, the externally characterized, the internal resistance of the battery is added, the capacity is lowered, causing a decrease in the capacity of the entire set of battery, and the large current discharge capacity (actual performance is climbing Ability) further decrease.

This phenomenon is called the vulcanization of the battery. Once the battery is vulcanized, it will not only reduce the capacity of the negative plate capacity of the battery, but also aggravate the downtime and the positive plate softening, affecting the life of the entire battery. Several vulcanized electric vehicle battery repair Method 1) Hydropherapy to the vulcanized battery, first discharge the battery, pour out the raw electrolyte and inject the density of 1.

10 g / cm3 less than the thin electrolyte, i.e., add water to the battery.

Liquid to increase the solubility of lead sulfate. The current below 20H is used for a long time in the range of no more than 20 ¡ã C to 40 ¡ã C. Finally, the electrolyte density to the standard solution concentration in the battery is adjusted with a slightly high electrolytic solution in the case of sufficient electrolyte.

Can be released, the capacity is restored to more than 80%, which can be considered successful. This method mechanism is used to reduce the solubility of sulfate by reducing the density of the acid solution, and the small current long time is charged to reduce the early appearance of the ohmic polarization delay water decomposition voltage, and ultimately reduce the vulcanization phenomenon in dissolution and conversion into active substances. Or eliminate.

This method is compared to the water storage battery, and the vulcanization can also be repeatedly processed. If you do not need to invest in equipment, you can repair itself. Diffility is that the process is too cumbersome to seal the battery is not used.

2) Shallow cycle large current charging method For the vulcanized battery, the medium current is used in the high current, charge the battery to a slightly filled state to control the liquid temperature does not exceed 40 degrees, then discharge 30%, so repeated several times can be reduced And eliminate vulcanization. This method mechanism is smashed with a slightly sulfide sulfide of the surface of the plate with overcharged precipitation gas to desolvate and convert it into active substance. This method is characterized by slight vulcanization.

However, the old battery is not applicable, as the active substance is so weak while precipitating the gaseous flushing sulfate, so that the active material is soft or even falling off. 3) Chemical repair method for the vulcanized battery, pour the raw electrolyte, add pure water and sodium sulfate, sulfate, tartaric acid, etc., take normal charge and discharge, then pour out pure water to add a slightly high-density acid solution Adjust the amount of acid solution in the battery to the standard liquid concentration, and the capacity is restored to more than 80%, which can be successfully repaired.

This method, the added sulfate coordination dopant, can form a coordination compound with many metal ions, including a sulfide. The formed compound is unstable in an acidic medium, and the non-conductive sulfide layer will gradually dissolve into the solution, and the plate is escaped. This method features, repair efficiency and efficacy than the first two repair methods, the disadvantage is too cumbersome.

4) Pulse Repair About the vulcanized battery, can use some special pulse repair instrument to eliminate vulcanization. This method mechanically, from solid, any insulating layer can be broken at a sufficiently high voltage. Once the insulating layer is broken, it will be converted from the insulation state to a conductive state.

If the instantaneous high voltage is applied to the sulfate layer having a large conductance difference value, it is possible to break the large sulfate crystallization. If this high voltage is short enough, it is currently limited, and the charging current is appropriate, it will not cause the battery to be paid. The amount of battery precursor depends on the end voltage of the battery and the size of the charging current.

If the pulse width is short enough, the duty ratio is large enough, and the microconchargeable simultaneous occurs at the same time when it is guaranteed to break through the crude sulfate crystals. If the polarization is contained in the negative pulse, it is more guaranteed to precipitate the gas of the sulfate layer time plate, so that pulse elimination vulcanization is achieved. From atomic physics, the sulfur ions have 5 different levels of energy levels, and ions in the metastable energy level tend to move to stable covalent health level.

In a stable covalent key state, sulfur presents in the form of a ring molecule comprising 8 atoms, the annular molecular mode of these 8 atoms is a stable combination, it is difficult to transition and shattered, the vulcanization of the battery is This stable level. To break the structure of these sulfurization, it is necessary to supply a certain amount of energy to the annular molecule, so that the electrons of the outer atom-added strap are activated to the next high energy band, so that the atoms are released between the atoms. Each particular energy level has a unique resonant frequency.

Energy excessive energy outside the resonant frequency will make the atoms of the transition in unstable state, and the low energy is not sufficient to make the atoms from the atomic group, so that the pulse repair instrument is multiple times. As long as there is a resonance with the vulcanized atom, the vulcanization atom can be converted to the free ion dissolved in the electrolyte, and the electrochemical reaction is re-participated in the electrochemical reaction. This method is characterized, the effect is easy to operate.

But there is a special pulse charger, and the individual users do not have, to buy. The pulse repair charger on the market is uneven, and many pulse chargers are even the pulse width ratio of the dedicated repair instrument, the duty cycle, and the negative pulse design is unreasonable and cannot be used to sulfide. Electric vehicle battery water-water method is correct.

Electric bicycle battery plus water should not only run a few kilometers or ten kilometers, don't expect to increase the high capacity, add water is not a million, but the correct water can extend the battery life. It is best to add water after the warranty of the merchant, that is, the general one or so. Add water to electric car batteries in the warranty period, after the battery is opened, the merchant is not warranty.

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