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Shangyu battery 6-FM-712V7AH DC UPS power battery genuine fire host

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UPSMatching method of power battery capacity

UPSMatching method of power battery capacity

In the UPS power operation, such as the occurrence of power interruption; the battery must provide enough DC energy within the user expected time to bring in the inverter, rated output load conditions below the critical discharge voltage of the battery voltage is not reduced to allowed. There is a close relationship between the actual battery available capacity and the discharge current size, temperature, storage time and other factors, only after considering the above factors, in order to correctly select and determine the ratio of battery available capacity and nominal capacity. Below, introduce the main methods and steps of UPS power battery selection.

The battery capacity is determined according to the discharge current

When the UPS specifications, electric power after load and inverter requirements for battery maintenance time is determined, the discharge current capacity can be calculated and the battery discharge time of battery. Battery discharge current:

I=P*COSφ/η*E*K

Type: P UPS rated output power (VA);

COS is the load power factor (the computer load is about 0.7);

      η:UPSThe output of the inverter efficiency (0.85~0.9);

      K:The battery discharge efficiency (0.95 preferred);

      EFor the critical battery discharge voltage.

The provisions of the commonly used discharge rate of the critical voltage value under the condition of 12V battery, the critical voltage is 10V, 2V critical battery voltage is 1.67V, if the battery backup time is longer, the battery discharge rate is small under the condition of discharge, 12V critical battery voltage is 10.5V, voltage is 1.75V. critical 2V battery

According to the user the battery backup power supply time, discharge curve of the battery specifications can be supplied from the battery manufacturers found the battery discharge rate formula:

The nominal capacity of the battery discharge rate = actual discharge current / battery

It should configure the battery capacity (AH).

For example: 1 100KVA output power is UPS, requirements for battery backup time is 20min, if the working voltage of UPS inverter is 384Vx2 (half bridge circuit), the battery consists of two sets of 32 12V series battery, if the battery critical voltage is 10V, the critical voltage two group 32 block the battery is 320X2, assuming that the load power factor is 0.8, the inverter efficiency is 0.9, the battery discharge efficiency is 0.95, and the discharge current:

I=100 X 1000VA X 0.8/0.9 X 0.95 X 320 X 2 =146A

In the battery backup time is 20min, the discharge rate is about 1.5C, so the battery capacity should be selected for 100AH, here is the calculated value, the specific use of the battery should be close to the 100AH battery specifications provided by the manufacturer.

Product introduction: 

The parameters of battery products

1.Reference standard 

MFDepartment of valve controlled sealed lead-acid battery with such as.
JISC8707-1992 fixed cathode absorption type lead accumulator seal standard
People's Republic of China machinery industry standard - JB/T8451-96
People's Republic of China communication industry standard - YD/T799-2002
People's Republic of China communication industry standard - DL/T637-1997



2The field of application. 

Uninterruptible power supply arms
The monitoring system of medical equipment
Communication equipment aviation / navigation system
The petrochemical industry / power plant


3The characteristics of lead-acid battery. 

Free maintenance (life without adding acid and water).
The use of strict production process, single voltage balance of good.
Adopt the special grid alloy, corrosion resistance and good performance of deep circulation,
Small self discharge.
Glass fiber composite technology - the gas adsorption efficiency is as high as 99% and
Low resistance, large current discharge performance.




4The installation requirements of.MF battery

Before use, check the battery appearance has no crack, breakage, leakage,
Once found should be timely to find the reasons for the replacement or.
The battery should be installed in the heat away from the fire place (more than 2M),
The exhaust must have good ventilation conditions, should ensure that the operation of the cell cycle
The mirror temperature of 15-25 degrees. The battery has a long service life.
The charging current and voltage, time must be in accordance with the provisions of manufacturers, to avoid the battery
Free of charge and discharge.
- handling, installation, to avoid the battery is in the process of using anode short circuit.






5. MFNote the use of lead-acid battery

Complete the disassembly of battery should be professionals, if due to mechanical damage to the battery electric liquid touches the skin or clothes. Immediately.
Water washing. If splashed into the eyes, as soon as possible to wash with water immediately and go to hospital for treatment.
- different capacity, different manufacturers and different batteries do not mix.
Do not use fiber cloth or sponge - flower wipe battery shell.
Battery - stop put more than 6 months, must be added before use.



6. MFSpecification for lead-acid battery

Battery

Model

Shell

Material Science

rated

Voltage

(V)

10HR

capacity

(AH)

Size (MM)

Reference resources

weight

(KG)

Supporting

Screw

(KG)

long

wide

groove

Total height

6GFM24

ABS

12

24

166

176

128

128

9.0

M5?16

6GFM38

ABS

12

38

198

166

170

170

11

M5?20 

6GFM65

ABS

12

65

351

166

175

175

20

M5?20

6GFM100

ABS

12

100

406

175

209

238

29

M5?25

6GFM150

ABS

12

150

495

205

207

241

40

M5?25

6GFM200

ABS

12

200

496

250

207

215

62

M5?25

 

7.Discharge characteristics

6GFMThe discharge characteristics of good series sealed battery has the particular characteristics of the large current discharge is more superior. The battery discharge capacity depends on the discharge current, terminal voltage and discharge time.
The different discharge rate discharge performance and termination voltage selection as shown below:

 

 

8.Self discharge characteristics

Since the characteristics of discharge of the battery during storage:

 

9.Charging characteristics

6GFMSeries seal requirement of battery charging method with current limiting constant voltage charging. In the environment of 25 degrees under the conditions of the floating voltage preferably 13.6 + 0.1V X units, the charging current at the beginning should be limited in the range of 0.25C10A.

The characteristics of constant voltage charging (25 C):


In different environmental temperature, suitable for battery charging constant value can be shown by the press, find the constant float voltage value of the whole group battery (battery charging voltage of X battery pack units)