some drawbacks during their operation. It is necessary to detect and deal with these drawbacks as early as possible. It is necessary to strengthen the maintenance of mining lead-acid batteries, which is extremely beneficial for improving their functional performance and extending their service life. Based on this, this article first introduces the common disadvantages and treatment methods of mining lead-acid batteries, and analyzes the daily maintenance methods of mining lead-acid batteries, hoping to provide reference and insights for those in need.

Keywords: mining lead-acid battery; Disadvantages; maintenance

Introduction

In recent years, with the expanding production and application planning of pure electric vehicles for mining and the increasing number of new batteries, the demand for intelligent and real-time testing equipment for lead-acid batteries has a great impact on the future development direction of battery management units. To ensure that lead-acid batteries can be used for a longer period of time, prevent overcharging and discharging of batteries, and ensure that the battery system is stable and reliable, it is necessary to fully utilize the characteristics of lead-acid batteries as much as possible. Daily maintenance of batteries is very important. Therefore, it is necessary for coal mining enterprises in China to ensure timely detection of shortcomings when using mining lead-acid batteries, conduct in-depth research and analysis of the primary causes of shortcomings, deal with them, and strengthen battery maintenance. Otherwise, it will affect the normal use of batteries and even cause unnecessary economic losses to the enterprise.

1、 Common disadvantages and treatment methods of mining lead-acid batteries

（1） Battery pack overheating

Firstly, the reasons for the shortcomings. Charging equipment malfunctions during the charging process; Battery aging may result in poor functionality; The internal connection orientation resistance of the battery pack is relatively high; Excessive discharge of battery pack; Wait. Secondly, the handling method. Repair or replace the faulty components of the charging cabinet, which mainly include the control board and timer, etc; The initial charging rate can be adjusted, or the discontinued charging rate can be replaced; Carefully inspect overheated charging plugs, wires, and batteries, etc; Replace defective components or repair them; It is necessary to open the battery compartment during charging, and charging can also be done outside the unit.

（2） The battery pack cannot end the work shift

Firstly, the reasons for the shortcomings. Before being officially put into operation, the battery pack was not fully charged; Battery pack repair errors may lead to aging; Residue appears in the battery pack; There is an issue with the electricity; Wait. Secondly, the handling method. It is necessary to charge the battery immediately after discharging; Replace or repair the battery; Replace battery packs of equal capacity, and it is necessary to replace them in a timely manner; Promptly identify the shortcomings of the vehicle and handle them sensitively.

（3） Unequal voltage of individual batteries

Firstly, the reasons for the shortcomings. There are many leftovers in the battery pack; The utilization rate is not high, and the battery pack cannot respond sensitively; Defects in the battery; The battery pack has aged; Due to the flipping of the battery pack, many battery acid solutions were discarded. Secondly, the handling method. Carefully clean the battery pack; Transform the tap into a voltage reducing resistor; Deeply discharge the battery pack and evenly charge it; Replace the battery case directly; Repair or replace problematic battery cells; Change the proportion of electrolyte occupied.

2、 Daily maintenance methods for mining lead-acid batteries

（1） Replace the battery specifications of the battery pack

For batteries whose elements have been removed from the battery case, it is necessary to balance charging and make appropriate adjustments and modifications to the acid solution after repair, otherwise they cannot be put into use. Before placing the battery in the battery pack slot, it is necessary to first confirm the positive and negative poles of the adjacent battery connected to it. The positive side of the battery should be connected in series with the adjacent negative side. Assuming the problem has been resolved and the battery has been placed in the slot of the battery pack, the cover should be resealed with the battery case. It is not only necessary to heat a special asphalt type sealing compound to melt it directly, but also to fill the gap between the sealing lip and the battery shell wall with an appropriate amount of cold compound when the temperature is below 400 degrees. Then, pour the heated compound into the sealing groove. First, fill the entire groove and use a soft flame to strengthen the adhesive type, then fill it up and heat it again with fire. It is necessary to ensure that the composite agent is completely cooled and the excess part is trimmed clean in a timely manner. After the sealing is completed, it is necessary to test the battery for 10 seconds using a maximum pressure of 1.5 psi, and once again adopt the welding method to correctly install the connecting strip between the batteries on the terminal pole.

（2） Regularly replenish the battery pack with water

There may be some degree of water loss in the battery, and it is necessary to use distilled water or "pure" tap water for compensation. In some areas, chemical substances may appear in tap water, and it is necessary to replace the battery with a new one in a timely manner. It is necessary to check the height of the electrolyte every week, not less than once. If necessary, sufficient water should be added to increase the electrolyte level, but it must not overflow. It is necessary to add water to the battery pack while discharging, and only increase the coverage of the perforated plastic plate, not too high. It is necessary to pay more attention to adding sufficient water frequently to prevent the electrolyte level from dropping below the position of the perforated partition plate. It is also necessary to scientifically establish a corresponding water addition schedule and ensure that there is sufficient water in the battery at all times.

（3） Regularly and carefully clean the battery pack

It is necessary to carefully inspect the battery pack every month, and the inspection frequency should not be less than once, to ensure that the terminal connection will not loosen, and to completely eliminate all dust and dirt on the top of the battery. Every week, it is necessary to carefully rinse with clean water, using a solution of baking soda and water to neutralize the acid accumulated on the battery and battery pack ends. It is necessary to ensure that there is no hissing sound before stopping. And it is necessary to properly handle the solution under the connecting strip, completely eradicate all loose dirt and traces of baking soda solution, and then carefully rinse the battery pack with water from the low-pressure hose. In addition, when flushing the top of the battery pack, it should be ensured that the vent cap is not loose in any way [3].

（4） Timely replace suitable battery cases and covers

As for the sealing compound and lead sheath, it is necessary to use an appropriate amount of asphalt compound to seal and cover the rubber. Press the lead sheath into the cover and weld it onto the terminal pole to prevent leakage of electrolyte near the pole. Generally, when replacing the cover, the first step is to use a warm putty knife to cut the composite agent reasonably. The cover should be placed on all sides away from the connection direction of the battery case. Some of the protruding poles on the cover should be cut off by a column trimmer, and the bond between the lead lining and the pole should be disconnected. A lead lining mold should be placed on top of the pole, and it should be quietly hammered with a hammer. It is necessary to use a vent to insert the hook, remove the cover in a timely manner, and remove all the sealing compound adhered to the battery shell wall. Use a cloth with soda solution to neutralize the surface and the top of each terminal pole, making the neutralized surface completely dry. Finally, the new cover should be installed correctly, and the battery connecting strip should be sintered again to ensure that both the battery shell and the cover are completely sealed.

（5） Sensitive adjustment and modification of charging cabinet equipment

Based on the capacity of the battery pack, make appropriate adjustments and modifications to the cut-off voltage and charging time of the charging cabinet to ensure moderate charging of the battery pack. A battery pack that is frequently overcharged often requires a large amount of water, and the temperature of the battery cannot be lower than the normal temperature. If any of the above conditions are true, it is necessary to adjust and modify the charging rate downwards, which is particularly important.

Conclusion

In summary, for electric vehicles, the battery is the only power source available, and its excellent performance directly determines the normal operation of the vehicle. There are often many drawbacks in application, such as overheating of the battery pack, inability to end the work shift, and unequal voltage of individual batteries. It is necessary to scientifically analyze the causes of these drawbacks and adopt effective methods to deal with them. It is necessary to strengthen the daily maintenance of mining lead-acid batteries in accordance with relevant regulatory requirements, so as to reduce the probability of defects and even prevent them from occurring, which can greatly ensure the normal operation of the battery.