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IEEE Lead Acid Battery Sizing Guide

This document provides a battery sizing calculation for a 192V lead acid battery system based on IEEE 485 standards. It lists the project details and sizing inputs such as nominal system voltage, temperature, and a single load profile of 5kVA for 30 minutes. The calculation determines the required battery capacity is 35.11Ah. The proposed battery model that meets this requirement is 1 set of 16 12V 42Ah OPTI batteries. The battery settings for minimum, float, and boost voltages are also provided.

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DEVI PRASAD GREENSECURE
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81 views2 pages

IEEE Lead Acid Battery Sizing Guide

This document provides a battery sizing calculation for a 192V lead acid battery system based on IEEE 485 standards. It lists the project details and sizing inputs such as nominal system voltage, temperature, and a single load profile of 5kVA for 30 minutes. The calculation determines the required battery capacity is 35.11Ah. The proposed battery model that meets this requirement is 1 set of 16 12V 42Ah OPTI batteries. The battery settings for minimum, float, and boost voltages are also provided.

Uploaded by

DEVI PRASAD GREENSECURE
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Version : Beta 3.

IEEE Lead Acid Battery Sizing

Enquiry Details
Enquiry Number :
Date : March 22, 2024
Customer :
Project :

Sizing Inputs ( IEEE 485 Based )

Nominal System Voltage : 192.00 V


Minimum System Voltage : 172.80 V
Maximum System Voltage : 216.00 V
Minimum Cell Voltage : 1.800 V
Number of Blocks : 16 Nos
Minimum Temperature : 25.00 °C
Design Margin : 1.00
Aging Factor : 1.25
Spare Capacity Factor : 1.00
Cell Type : 12V SMF (Optimuz Series)
Power Factor : 0.80
Inverter Efficiency : 90.00 %

Load Profile : Power ( KVA )

S. No. Load (KVA) Duration (mins) Equivalent Amps

1 5.00 30.00 25.72

Page 1 of 2 The document becomes contractual only after HBL acceptance and acknowledgement of a purchase order
Version : Beta 3.0

Battery sizing calculation sheet IEEE 485


Minimum Expected Minimum
Temperature : 25°C Cell Voltage: 1.800 V Cell Type: 12V SMF (Optimuz Series) Sized By:

(1) (2) (3) (4) (5) (6) (7)


Period Load Change in Duration Time To End of Capacity Rating Required Section Size
Load of Period Section Factor (3) x (6) =Rated Amp hrs
(amperes) (amperes) (minutes) (minutes) t Min Rate(Kt) Pos. Values Neg. Values

Section 1 - First 1 Period Only - if A2 is greater than A 1, go to Section 2


1 A1 = 25.72 A1-0 = 25.72 M1 = 30 t=M1= 30 1.092 28.09 0.00
Section 1 Sub Total 28.09 0.00
Total 28.09

Uncorrected Size (US) (8) 28.09 Ah x Design Margin (9) 1.00 x Aging Factor (10) 1.25 x Temperature factor (11) 1 x Spare
capacity factor (12) 1 / State of Charge Factor 1.00 = (13) 35.11 Ah
When the cell size (13) is greater than a standard cell size, the next larger cell is required.
Required cell size (14) 35.11 Ampere Hours. Therefore, cell (15) OPTI 42 is required

Battery Proposal

Calculated Capacity : 35.11


Proposed Battery Model : 1 x 16 x OPTI 42
Nominal Capacity : 42 Ah

Battery Settings

1. Minimum System Voltage = Number of Blocs x 6 x ECV = 172.8 V


2. Maximum System Voltage during Float = Number of Blocs x 6 x 2.28 = 218.88 V
3. Maximum System Voltage during Boost = Number of Blocs x 6 x 2.33 = 223.68 V

Page 2 of 2 The document becomes contractual only after HBL acceptance and acknowledgement of a purchase order

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