Collection of Common Problems During Lead-Acid Battery Repair Process

1. Can the terminal voltage of the battery be used to judge the quality of the battery?

Answer: No. Low terminal voltage is caused by battery short circuit, open circuit and lack of power.

2. Does the repair process require opening the battery?

Answer: No need.

3. Under what circumstances will vulcanization occur?

Answer: Over-discharge, failure to balance charge in time; electrolyte level dropped, failure to replenish pure water in time; improper replenishment of sulfuric acid; long-term undercharging, overcharging or excessive storage time will cause sulfation.

4. What is the process of repairing the battery?

Answer: First conduct an initial test on the battery, and then add a security system product to maintain the battery based on the actual condition of the battery, formulate an inspection plan, and detect and regularly inspect the battery condition.

5. Where did the shattered crystal go?

Answer: The crushed crystals are first converted into unstable molecules, and then converted into free ion states that can be dissolved in the electrolyte through the charging process, and then participate in the chemical reaction again.

6. How much impact does vulcanization have on the battery?

Answer: Vulcanized batteries have strong polarization, poor charge acceptance, poor effectiveness of active materials, rapid drop in discharge terminal voltage, and low rated capacity. During charging, the voltage rises quickly, the density of the electrolyte cannot reach the specified value, the excess gas is decomposed, and the battery temperature is high. In chemical reactions, the contact area of molecules is small and the reaction energy is small.

7. Is it true that no matter how long the battery is used, it can be restored to like new as long as the sulfide is removed?

Answer: No. Because it is inevitable that the active material on the battery plate will fall off, and its fatigue determines that after the battery is used for a long time, the sulfide capacity can be greatly improved by removing the sulfide, but it cannot be the same as a new battery.

8. How to determine whether the battery has been repaired?

Answer: After using a power tyrant or repair device for a period of time, by testing the battery, it can be determined that the battery has been repaired when the battery capacity reaches more than 85% of the rated capacity.

9. How to connect the instrument to the circuit?

Answer: Connect in parallel to the electrodes at both ends of the battery.

10. Do maintenance-free batteries still need this kind of maintenance?

Answer: Yes. Maintenance-free batteries are easier to vulcanize. New batteries use protectors and have better sulfur removal effects. However, because the electrolyte of maintenance-free batteries will dry up, the lifespan cannot be extended as much as open lead-acid batteries.

11. Which maintenance effect is better for open or sealed batteries?

Answer: Sealed.

12. To what extent does the battery life depend on vulcanization?

Answer: 80% of batteries end their battery life due to sulfation.

13. What is the general working principle?

Answer: Use pulse sweep oscillation technology to scan changes in frequency and pulse voltage to find the resonance frequency of sulfate sulfide crystals to produce resonance decomposition crystals and convert them into the most unstable lead sulfate molecules, and then charge the battery during the charging process. The pole pieces gradually detach and transform into free ions and enter the electrolyte, completely changing the sulfuric acid sulfation problem of the battery.

14. What is the explanation for the fact that the battery can be repaired to more than 100%?

Answer: It is very common for batteries to reach more than 100% when discharged at a rate greater than 10 times.

15. Why do 2V batteries have a longer life than 12V batteries?

Answer: The 12V battery is composed of 6 battery cells connected in series, and the 2V battery is composed of one cell, and its coordination is much better than that of the 12V battery.

16. How long is the life of a typical battery?

Answer: Lead-acid batteries are tested on a cycle basis, which is 300-500 times; when used for float charging, their lifespan is 3-4 years (12V battery)

17. What is the starting current of a car battery?

Answer: 3-4 times the rated capacity.

18. Why are the nominal voltages multiples of 2.0V?

Answer: The voltage of each battery cell is 2.0V, and the battery is composed of several cells connected in series.

19. What impact does the surrounding environment have on the use of batteries?

Answer: Temperature has a great impact on battery capacity and life. As the temperature decreases, the battery capacity decreases, and the battery life increases as the temperature increases. Between 100℃ and 350℃, for every 10℃ increase, approximately 5-6 charging cycles will be added. Between 350℃ and 450℃, for every 10℃ rise, more than 25 cycles can be extended; above 500℃, Life is limited due to loss of vulcanization capacity of the negative electrode.

20. Under what circumstances will a battery short circuit occur?

Answer: The metal lead is clamped between the positive and negative plates; the separator is broken and the bipolar plates touch together; the active material of the plate falls off, and the bottom and both sides are overlapped by the fallen matter; the vulcanization is severe, the plate is squeezed, and the plate Expansion, bending, bulging, extrusion and perforation of the separator, rupture of the battery compartment, penetration of acid, etc. will all cause a short circuit.

21. Is there a simple way to test the degree of vulcanization of a battery?

Answer: 1. If the voltage exceeds 15V after charging at 40A for 3 minutes, it means there is sulfation. If it is lower than 15V, it means the battery is good.

2. The simplest method: During charging, the terminal voltage rises quickly and has a high peak value. The single battery is around 2.9V. When discharging, the terminal voltage drops quickly. After charging, the electrolyte density is lower than the normal value and the performance lags behind for a long time. , during normal discharge, the capacity of batteries with sulfurized plates is significantly lower than that of other batteries. During charging, the battery gas decomposes early, gases intensely, and the battery temperature is high. The positive plate is light brown, the negative plate is gray-white, and there are coarse particles of lead sulfate crystals on the surface.

22. Can the positive and negative poles of the reversed battery be used interchangeably?

Answer: No. If the polarity is reversed during normal production, it can be replaced and used. If the polarity is reversed due to over-discharge or severe sulfurization, the battery is equivalent to a resistor and cannot be charged or discharged.

23. What should we pay attention to in the management of large battery packs?

Answer: The battery pack should not be left in an overcharged or overdischarged state for a long time. The battery should be properly discharged and balancedly charged. When idle, it is best to use a lead-acid battery maintenance system to maintain the battery to keep it in a new state.

24. What are the characteristics of valve-regulated lead-acid batteries?

Answer: Valve-regulated lead-acid batteries have three major characteristics:

1. The electrolyte is in a stagnant and lean state;

2. It has a safety valve that opens and closes automatically;

3. The recombination of oxygen in the battery solves the problem of gas evolution.

25. Will the repair instrument charge the battery for a long time and cause overcharging?

Answer: It will not cause overcharging. Because the repair instrument uses frequency sweep oscillation technology, it only repairs and prevents sulfate crystals, not the principle of the charger.

26. What problems will occur when batteries of different capacities are used together?

Answer: If batteries of different capacities or old and new batteries are mixed together, leakage, zero voltage, etc. may occur. This is because during the charging process, the difference in capacity causes some batteries to be overcharged and some to be undercharged. During discharge, some batteries with high capacity are not fully discharged, while those with low capacity are overdischarged. In such a vicious cycle, the battery is damaged and leaks or has low (zero) voltage.

27. What is the reverse polarity in the battery? Why is it only displayed during discharge?

Answer: Reverse polarity means that the positive and negative poles of a certain cell inside the battery are reversed, which is the opposite of the series connection order of most single cells. Because the reverse polarity battery is equivalent to a battery with a large internal resistance during charging, it can only be determined by the test terminal voltage during discharge.

28. How to dispose of batteries without any markings?

Answer: Check the volume. According to the control of electrolyte and voltage, charge the battery three times and discharge it twice to test the capacity.

HZNZ-100 Battery Impedance Tester