1. Preparation: The equipment, tools and materials needed for preparation are: QN-20 10XP battery repair instrument, acidity hydrometer, universal ammeter, distilled water, sulfuric acid or special standard solution for storage battery (also called electrolyte), ordinary large battery charger and rubber gloves.
2. Clean the dirt on the surface of the battery to be repaired with warm water and towel, and then unscrew the exhaust bolt.
3, detection of three elements:
A. (Degree) After unscrewing the exhaust plug, first observe whether the electrolyte inside the battery is sufficient (slightly mark the electrolyte degree in the middle, and replenish it in time if there is no electrolyte).
B. (Acidity) Absorb the electrolyte with an acidity meter, and check whether the acidity is suitable for measuring the specific gravity of the electrolyte in each hole. Adjust the specific gravity of electrolyte in all holes to be between 1.20- 1.22 in summer and 1.25 in winter. If the specific gravity of the electrolyte (yellow exceeds 1.3 1), it should be diluted with distilled water.
C. (Turbidity) Whether there are black turbid impurities. If there are obvious thick black-red turbid impurities, it means that the battery plate is obviously softened and the battery is likely to be repaired. If there are only black and red impurities, the liquid should also be changed.
Attachment: (Preparation of Electrolyte) The preparation method of electrolyte must first pour concentrated sulfuric acid into a plastic cup, and then slowly pour it into distilled water while stirring. The specific gravity of electrolyte is tested by an acid meter to meet the winter or summer standards.
4. Measure the open circuit voltage and closed circuit voltage of the battery for registration. The open circuit voltage shall be 12V, and the closed circuit voltage shall be 9V. If the open-circuit voltage of the battery is 10.8V, and the closed-circuit voltage is detected by QN- 1000 rapid detector, the battery may have the problem of internal board short circuit. Batteries may have no maintenance value (but they should be easily discarded).
5. Pre-charge (this step can also be omitted. It is also wrong to supplement the charging time after the direct repair machine is repaired)
Step 6 repair
Connect the anode and cathode outputs of QN-20 10XP battery repair instrument to the battery anode and cathode column opening repair instrument (from step to step), first set the repair voltage gear 12v, and then adjust the current gear sequence. If the ammeter pointer works normally after 15-30 minutes, you can use the maximum current gear (gear 3-4). The first battery repair should be on 12 (because of power consumption, I usually take a 20-hour repair method). After the repair, use an ordinary big charger to charge at five o'clock (the battery charging voltage will reach 13.5v- 16V, so it will drop to 13- 14V after charging. )
You can also continue to observe the situation while repairing 12. Batteries that have been stored for many years beyond the time limit need to be repaired twice or three times in the process of repeated charging and discharging before they can be restored to the state before the time limit.
Matters needing attention in the repair process:
1, check the acidity in the grid every 1-2. If the phenomenon is found, the original acidity will change (especially after 10 hour repair). The acidity will increase and the chromaticity will turn yellow (this situation shows that the normal lead sulfate content explains the release of acid radicals). If the acidity drops to red or even white (indicating that there is a big problem with this grid, you can try adding sulfuric acid to adjust the acidity to 1. Continue to repair and observe. When the acidity of the battery is found to be red or even white, it can be concluded that the plates in the battery are obviously softened or corroded. If the overall repair voltage is 14V, give up the repair! ! ! (If no response is observed in the 1-2 area, it can be fixed by "Operation").
2. When the acidity in all batteries is normal, the on-line working voltage will generally rise to 15~ 16v after continuous battery repair, and the ammeter pointer (A). I will stop the maintenance at this time and charge it with a 3A special battery charger (generally, my experience is: charge it 4-5 hours before the customer picks up the goods, because big battery customers like to test the quality of your maintenance 2-3 times after installing the battery, so I will definitely be able to meet the customer's needs to start testing at the last stage, and it is extremely troublesome to get back the big battery during the warranty period).
3. If there is a battery machine 10 minutes, the pointer of ammeter A does not respond (preliminary judgment may be short circuit). At this time, the activation method must be used to stop and repair the machine.
A. Charge for 2 hours with a special large battery charger. When the voltage rises, the activated battery will be repaired on the computer.
B. Connect a similar battery in series with the battery (activate the "problem battery"), set the gear to 24V current of 1, and then start maintenance. In this way, use a battery to "bring" the problem battery to activate it. As long as the battery is disconnected for about 15 minutes, it will turn normal, and then the good battery can be removed and repaired separately.
C in this case, the repair time of batteries is 20 hours, and then the repair steps and methods are the same as above.
D. In the final stage of repairing the large battery, it is best to use the current of 1 as much as possible to carry out "stable repair" within 3-5 hours.
Note: It takes a long time to judge whether the ammeter pointer A is short-circuited, and it should be kept in the maintenance machine for a long time (which will affect the service life of the maintenance machine).
reference data
Beimai. com:/baoyang/ 15a 1769 1b0c . html