The manifestation of several common battery failure
Battery itself quality problems, or because of improper use, will make the actual capacity drop, increase internal resistance of battery, serious accident will happen, even endanger the normal operation of the UPS and power function not normal play. Here, the home of electrician briefly describes several kinds of common faults of the battery for specific performance.
1, battery water loss
Battery is in the ‘poor liquid state of the job, the electrolyte is stored in the electrodes and the porous membrane completely, once the battery fluid loss, its capacity is about to fall, when the water loss of 3.5 ml/AH, battery capacity will fall below 75% of the initial capacity, when the water loss of 25%, the battery life will be terminated.
Control using the environment temperature, battery charging current, charging voltage and adopting integrated valve structure and choose reasonable opening and closing of the valve pressure, no sheeting antimony alloy technology are adopted to decrease the hydrogen evolution overpotential, sealed reaction efficiency measures is effective to prevent the battery water loss.
2, battery slot deformation
Once the battery casing deformation, can make the plate by not tight, also cannot give full play to the role of electrolyte, make the battery internal resistance increases, the discharge capacity decreases.
The cause of the battery slot deformation is mainly caused by the battery internal temperature is too high. In use process should be controlled battery using the environment temperature, control the battery charging current and charging voltage, prevent the battery overcharge, at the same time using the assembly pressure of super strong ABS materials and reasonable design is also very important.
3, battery leakage
Battery pole pillar phenomenon will make cable climbing acid from corrosion, or increase the column with the connection of the contact resistance, serious when can also affect the power supply system of other equipments.
Battery leakage phenomenon is mainly by the battery to the low level of design and manufacturing or raw materials caused by improper use. In order to prevent battery leakage phenomenon, it should be improved in the production process column sealing technology, high quality polar column sealant and ABS slot cover heat sealing technology.
4, battery capacity is insufficient
Due to the poor quality of battery, while its initial capacity can meet the design rating, but with the soon, its capacity is decreased significantly, not to the regulation, could the its capacity has dropped below 80% of the rating. The causes of insufficient battery capacity a lot. Among them, the quality of the battery itself the reasons are:
1) is to delete plate corrosion deformation or fracture.
2) battery raw material configuration or unqualified;
3) production, lax control of technical conditions;
4) the positive active material softening fall off.
The condition of the battery and the factors such as environmental temperature are:
1) the discharge rate is too large;
2) environmental temperature is too low;
3) high environment temperature reduce life;
4) long-term storage aging;
5) charging parameter Settings.
In order to prevent the battery capacity decline in addition to proper use and maintenance, the current technology of advanced battery manufacturers have begun to adopt 4 bs lead paste and no sheeting antimony alloy. 4 bs lead paste technology can effectively prevent the battery capacity decline in early, without antimony plate grid alloy technology can improve the interface between the sheeting and the active material structure, increase the ability of battery charging to accept.
5, battery float charging pressure uniformity is poor
In the normal order of battery float charging pressure and the difference between the average of the whole battery should not > 50 mv, float charging pressure uniformity is poor this phenomenon is the main reason of the production process problems.
In order to improve the uniformity of battery float charging voltage, in the process of production should be strictly control the deviation of each working procedure.
6, thermal runaway
Bad battery maintenance, the constant pressure there is a kind of critical state during charging, the battery charging current and temperature will happen a cumulative of mutually reinforcing effect, light person can make the slot deformation, shorten the battery life, the person that weigh will infect the whole power system security.
The cause of thermal runaway is various:
1) reaction gas compound inside (that is itself (thermal) makes the battery temperature and, in turn, increase the float charging flow, analysis speed, complex reaction intensified;
2) the battery itself is‘ barren solution type and tight assembly structure design, make the battery internal heat dissipation difficulties;
3) temperature of the battery temperature, under high temperature, the temperature rise per 1 degree, single battery voltage drop nearly 3 mv, float charging flow increase, further raise the battery temperature.
7, exhaust valve failure
Exhaust valve has a fault when the throttle pressure will change, open the valve pressure will cause the battery slot deformation, open the valve pressure variable hours water loss is big, long the bottom go to, can bring bad effects to the uniformity of the battery pack.
Exhaust valve failure is the main reason of the production materials and production process problems.
