When the UPS battery manufacturers in the configuration, the selected design capacity is not fully meet or exceed the load capacity and power supply power supply requirements of the time, but UPS put into operation, users often find in the city after the UPS does not power outage The actual time of supply is far less than the design value, the reason for this phenomenon, in most cases is not the initial configuration, the Panasonic Nv-ds3 Battery reserve capacity is not enough, but the capacity of the Nikon Coolpix s6 Battery did not play out. Reduce the actual battery capacity caused by many reasons, there are Jvc Gr-ax200 Battery quality problems, but more of a use and maintenance issues.
(1) battery capacity
Lead-acid SAMSUNG WB500 Charger battery plates during the manufacturing process, the students charge into the plate, then the positive plate of lead into lead dioxide, the negative plate spongy lead into lead, but the manufacturers into the plate to time is limited, not all of the substances are converted into active substances, for which the new national standard of 90% Motorola HT800 battery capacity as qualified, and only in the subsequent daily use, the capacity gradually to normal, two years after the installation requirements up to 100%.
The rated capacity of the battery pack is under the required discharge rate obtained,
Discharge rate (1 / H) = discharge current (A) / rated capacity (Ah)
For example, UPS power supply used in the typical size of a small Toshiba pa3420u-1brs Battery is l2V, 6Ah/2Ohv, this specification is defined as the output DC voltage l2V, nominal capacity of 6Ah, discharge rate conditions for 20hr. Specific meaning is: the output DC voltage l2V to 20H battery pack placed under conditions of constant discharge rate of discharge, the output voltage has been put down by the l2V l0.5V when measured by the total number of hours should be 6Ah security .
China, Japan, Germany, industrial Sony DCR-DVD91E Charger battery with 10 hour rate (expressed as C10), the U.S. battery industry standard 8-hour rate (expressed as C8,). In actual use, the discharge rate is not equal to the standard provisions of the capacity of the discharge rate, when the actual discharge rate is greater than the nominal capacity specified discharge rate, the actual output capacity of less than nominal capacity.
China's electric power, telecommunications standards, 10-hour rate NEC VERSA FM320 Adapter battery discharge when using the 1 hour rate, its capacity is 55% of nominal capacity, ie 0.55C10. Japanese Industrial Standard specifies 2V/10 hour rate battery, 1 hour rate capacity of 0.65C10, 6V, 12V, 10 hour rate battery, 1 hour rate capacity of 0.6C10. 20 hour rate Panasonic Lumix Dmc-fz3 Battery, 10-hour rate capacity of 0.93C20, 1 hour rate capacity of 0.56C20.
Battery life, there are two expressions: one for the deep cycle batteries used, and the other to float using the "standby power" battery. Deep cycle IBM 40Y7667 Adapter batteries for deep cycle use to indicate the number of its life, the depth to 0.8C10 use of battery charge-discharge cycle, the life expectancy of more than 1200 times, and the use of floating battery life of up to 10 to 20 years. Only 80% of battery capacity that the end of life.
Actual service life and design life are very different, depending on the loss of water in the NEC VERSA FM320 Laptop AC Adapter battery case. Under the conditions used in the design can meet the design life, and when the external conditions such as temperature, charging voltage, depth of discharge exceeds the design requirements and other changes, the actual life will be significantly lower than the design life, the actual use of capacity will be less than design capacity.
(2) The discharge rate of the battery capacity of the actual output
Battery capacity C (Ah) is equal to the discharge current (A) and the Panasonic Lumix Dmc-fz3 Battery voltage reaches the lower limit of the discharge time (h) of the product, and discharge rate (1 / h) is the actual discharge current (A) and the nominal Olympus Li-40b Battery capacity (Ah) the ratio.
The actual operation of the UPS, mains power failure, the inverter requires the battery to bear the full load power, the discharge rate depending on the different back-up time are very different, for example, standard machine 1Omin about maintaining a very short time, the discharge rate large, time-lapse machine up to 4h or 8h, discharge rate is very small. Therefore, the actual Canon Bp-511 Battery discharge rate is not defined in the specification of the battery discharge rate, discharge curve shown in Figure 5-1 reflects the different rates of discharge capacity of the battery.
Tuen smaller pool of actual discharge current, battery voltage to maintain the stability of the longer, and vice versa. For example, 1OOHR battery, when the discharge current of 5A, the discharge rate 0.O5C, the output voltage is maintained at 12V or more of the time up to 10h, when the Sony HDR-SR10/E Charger battery voltage drops to 10.5V when the threshold voltage, discharge time up 2Oh, battery capacity is essentially the release of its nominal capacity. If the discharge current increases to 1OOA, the discharge rate of 1C, the output voltage is maintained at less than more than l2V 1Omin. When the Acer Aspire 7730 Battery voltage drops to the threshold voltage, the discharge can be maintained for longer than 3Omin, the actual capacity of 58.3.M released, far lower than the nominal capacity 1OOAh.
Battery pack to allow the discharge threshold voltage value and the actual availability of capacity (AM all bow the size of the Motorola GP320 battery discharge current are closely related.
Battery discharge time allowed in the actual discharge the battery discharge current, the battery voltage from the rated value down to its threshold voltage to allow the time spent.
The efficiency of batteries available for it in the actual discharge current can release the actual maximum capacity and the ratio of its rated capacity.
Note the different discharge rate case, the dell Inspiron 1545 Laptop AC Adapter battery terminal voltage drop is changing the critical value, the discharge rate is low, such as 0.01C, the actual release of the nominal capacity of close to capacity, which allows the battery terminal voltage drop is high ( 10.5V), the discharge rate is high time such as 1C, the actual release of the capacity is small, but allows the OLYMPUS EVOLT E-410 battery terminal voltage can be lower (8V).
Excessively high current discharge is detrimental to work. Configuration for UPS batteries, the UPS battery alone inverter output current required during the time and battery-powered configuration with a nominal capacity of the battery is not enough, it must be based on inverter when the Camcorder Battery SONY ALL M SERIES discharge rate and the selected Battery output characteristics, and increase the battery capacity with.
next blog: Complete two AA batteries/USB power management device
source from blog: http://batteru.blogspot.com/
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