Feel free to reach him for feedback, random tips or just to say hello :-). If you need to install 120 Ah, 150Ah, 200Ah or 250Ah batteries, simply divide the battery bank size by the desired Ah rating of the battery. First of we have to enter the Electrical Load Detail in Electrical Load Sheet .The following are input values we have to enter in the Columns :-. 1) In our 20 MVA Substation, we are going to replace our 48 VDC Batteries (4-12 VDC batteries, 100AH into 2Volts, 200AH batteries (24pcs.). How to Fill in the Loadsheet: Step 1: Download our Loadsheet or create your own loadsheet (see instructions below..). Your email address will not be published. And inverter sizing consists of two parts, voltage and current sizing. "url": "https://electricalacademia.com/category/batteries/", i require it for an under graduate research project. Step 2: List all the appliances you want to be Solar Powered (e.g. To use this spreadsheet enter your data in the shaded cells. @ @ l! The controller size is then 1000/24 = 41.67 amps. 0 0 _ ) ; [ R e d ] \ ( [ $ - 2 ] \ # , # # 0 . thank you in advance! , : _("$"* #,##0.00_);_("$"* \(#,##0.00\);_("$"* "-"? In fact, power grids around the world would be helpless without substations. Please Whitelist Our Website by Allowing Ads, How to Calculate the Right Size Battery? To get the Ampereof the the battery bank required: Download McQuay Duct Sizer for HVAC Duct Sizing, Download AutoCAD Fonts Library - Free SHX Fonts, Download ASHRAE Heat Load Calculation Excel Sheet XLS, Download Electrical Cable Size Calculator Excel, Download AutoCAD Details for HVAC Equipment - Free dwg, Download Free Arabic and Kufi SHX AutoCAD Fonts, Enter Reserve Day: (How many days Do you want to get Power from battery Banks). The size and mass of the high voltage battery are very important parameter to consider when designing a battery electric vehicle (BEV). (a) 1 x 100 % Battery and 2 x 100 % Battery Charger are considered for 220V DC system. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. LOAD CALCULATION: @ @ l!! Load (watt): If the load type is watt, specify the load in watt, for example 100 W. Use and average value if its a cyclical load. My question is: a) Is there a need to upgrade the charger since we will upgrade the batterys AH? "@type": "ListItem", For short discharging time (<15 minutes), an EODV of about 1.66V per cell may be utilized without cell damage. Depending on the battery parameters,there may be several levels of modularity. We can now recalculate the battery pack total energy E bp [Wh] as the product between number of strings N sb [-] and the energy content of each string E bs [Wh]. x @ @ @ l!! The number of cells required for a particular voltage rating is presented below:if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'electricalacademia_com-banner-1','ezslot_7',143,'0','0'])};__ez_fad_position('div-gpt-ad-electricalacademia_com-banner-1-0'); Nevertheless, the number of cells required can be determined more precisely in order to match with the load tolerance more accurately. Therefore youll multiply (Ep+Eaux) with 1.2. " X H l! Therefore, the result of the calculation is rounded to the higher integer. Thus, youneed your engineer on record to review the existing chargers compatibility. In our example, the number of days of autonomy is 2 days. In this example we are going to caclulate the volume of the battery pack considering only the battery cells. For lead-acid type batteries, an EODV is principally based on an EODV value that prohibits cell damage by over-discharge. 8@ Step 4: Choose the Battery Cells Required To Be Linked In Series Fashion. 4471 0 obj <>/Filter/FlateDecode/ID[]/Index[4462 16]/Info 4461 0 R/Length 62/Prev 944328/Root 4463 0 R/Size 4478/Type/XRef/W[1 2 1]>>stream Cloudflare Ray ID: 7a1638403ecb3f64 Therefore, the result of the calculation is rounded to the higher integer. This excel sheet calculates the number of turns in primary and secondary and total area occupied by winding. But why, you ask? The DoD (Depth of Discharge) is the charging and recharging (single) cycle of the battery i.e. Without proper ventilation, hydrogen gas builds up and increases explosion risks. and intermittent loads (heater, brake lights, wipers, etc.) The UPS sizing calculation can be done when the following prerequisite information is known : - UPS load that need to be supported - Input / output AC voltage - Autonomy time - Battery type. Individual battery cells may be grouped in parallel and / or series as modules. Example of UPS battery sizing. There are recommended battery sizing practices in IEEE 485 as well. As you can see in the datasheet. This particular factor accounts for voltage reduction during the discharge of the battery. But it doesnt stop there batteries also do the following: Without reliable DC backup power, you risk damage to your substation and downstream equipment, not to mention safety concerns. But before we get started, the following are the two types of loads in a substation: Now, well go over the loads for our substation battery sizing calculation. . 104-111. The battery capacity desired to accommodate the total designed load over the determined back up (autonomy) time can be computed using the following equation: \[{{C}_{\text{minimum}}}=\frac{{{E}_{de}}\left( {{k}_{af}}\times {{k}_{tcf}}\times {{k}_{crt}} \right)}{{{V}_{dc}}\times {{k}_{mdod}}\times {{k}_{se}}}\], ${{E}_{de}}$, total designed energy over back up time (VAh). The DoD (Depth of Discharge) is the charging and recharging (single) cycle of the battery i.e. Sizing the substation battery charger Required charger rating: , where: A = required charger output rating k = efficiency factor (1.1 for lead acid batteries) The following step is the selection of the type of battery (e.g. All high voltage battery packs are made up from battery cells arranged in strings and modules. 172.104.178.68 When youre connected to the AC power supply, the following two things happen: If you need an extra boost of power, the batterys got you covered. We assumed the following values in order to compute the battery capacity: Using the above mentioned parameters, we can compute the minimum battery capacity as: \[{{C}_{\text{minimum}}}=\frac{3245\times \left( 1.30\times 0.96\times 1.12 \right)}{120\times 0.75}=50.4\text{ Ah}\], Did you find apk for android? Replacing the values in (2) gives the average energy consumption: The battery pack will be designed for an average energy consumption of 161.7451 Wh/km. Notify me by email when the comment gets approved. Copy of Battery Calculator 9 3.3,Value,Unit,Description Range and Battery info for someone's else build (for same/similar car to yours) # of Cells,170,count,Get these 3 values from someone else's build. Download free excel program for cable sizing calculation . = 1.5 x 2 x 1.5. To calculate the exact size of battery capacity, follow the following simple steps (Solved Example). { For this reason, the current should be limited to a maximum and the nominal power obtained by having a higher voltage. } Report DMCA. No of Required Batteries (Parallel): 999 Ah / 100Ah =, The following calculator will do the above mentioned task by just putting the required values. Output. Generally, EODV ranging between 1.750V and 1.80Vis utilized per cell when discharging time is longer than 1 hour. Koosha started Engineer Calcs in 2020 to help people better understand the engineering and construction industry, and to discuss various science and engineering-related topics to make people think. The Battery Sizing module determines the number of strings, number of cells, and cell size of a battery for a designated duty cycle and also compensates for real-life variables such as temperatures, aging, and initial capacity that apply to these type of critical electrical systems. Step 1: Calculate Your Load. "@id": "https://electricalacademia.com/batteries/battery-sizing-calculation-solved-example/", Battery Capacity vs. Rate of Discharge When sizing a battery, we must account for discharge rates in addition to total energy Larger nominal capacity required for higher discharge rates For example, consider a cell with the following constant-current discharge data for a minimum cell voltage of 1.8 V Discharge Time [hr] How to Size a Single Phase and Three Phase Transformer in kVA? Battery Bank Connection Detail : If You are Select Battery Volt Volts DC If You are Select Battery Size Amp.Hr Batteries connection for Battery Bank Series-Parallel Selection of Batteries Connection: Selection of Each Battery Voltage Number of String for Battery Bank Total Amp.Hr of Each String Amp.Hr Total No of Battery in Each String @ @ l! Measured with Kill-a-watt Watts used while on: 6W Watt-hours over a 6 hour period: 18Whr Calculated: Average Watt-hours per hour = 18Whr/6hr = 3Whr/hr Watt-hours per day = 3Whr/hr * 24 Hr/day = 72Whr/day Time on per day = (72Whr/day)/6W = 12 hrs/day Edited to clarify run-time math [3]Tom Denton,Automobile Electrical and Electronic Systems, Third edition. This MS Excel spreadsheet calculates the following: Total Demand Load Size of Solar Panel Select Type of Connection of Solar Panel Select Rating of Each Solar Panel Energy from Solar Panel as per Daily Sun lights Size Battery Bank Select Type of connection of Batteries in Battery Bank Size of Inverter In short, the deeper discharge will shorten the life of the battery. The results of the equations (7) to (20) are summarised in the table below. Important Note: The Multifunction relays consist of all your regular protection relays. not just cells. @ @ " " 8 Generally, the Autonomy Method is utilized to establish a load profile for batteries. This volume is only used to estimate the final volume of the battery pack, since it does not take into account the auxiliary components/systems of the battery. The battery pack continuous powerPbpc [W] is the product between battery pack continuous current Ibpc [A]and the battery pack voltage Ubp [V]. The battery pack which will be in the vehicle will have additional components (wires,electronic components, soldering, case, etc. You will have to connect 10 batteries each of 100Ah in parallel to run a 900Wh load (minimum for 3 hours) per day with 2 autonomy days. This is why they need batteries to ensure all critical substation loads can operate at any time. Image: Battery cell volumetric energy density, Image: Battery cell gravimetric energy density. Although the 12V system is more common, you may use a 24V or 48V system for solar panel installation systems depending on the system configuration requirement. Electronics-lab.com 2023, WORK IS LICENCED UNDER CC BY SA 4.0. Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? A low charge causes sulfation, leading to attenuated performance. Example #2. For more accurate sizing, including using your location . 301-325. "itemListElement": @ @ l! [2] Bernardini, Annalia & Barrero, Ricardo & Macharis, Cathy & Van Mierlo, Joeri. The string peak current Ispc [A] is the product between the peak C-rate of the battery cell C-ratebcp [h-1] and the battery cell capacity Cbc [Ah]. derating factor for lead acid designs in sizing calculations. Over 100 Powerful Engineering Resume Buzzwords, Homeowners Guide For a Structural Engineer Inspection, 12 Essential Portable Generator Maintenance Tips. Example: A solar array is producing 1 kw and charging a battery bank of 24V. Insert all figures in decimal, eg 2 or 1.5. } hey could you give me the password to unprotect sheet, There is no password to open the XLS file. Your comment highlights how the post needs some added clarity with the percentage though. This calculation method is more appropriate for cylindrical cell, since the volume occupied by a cylindrical cell must take into account the air gap between cells. In order to have a better overview of the cells parameters and to compare them easier, the mainparameters are displayed as bar graphs in the images below. In short, you want ample backup power allowance for operators to restore AC power or make any necessary control decisions. 0 0 \ ) + ) , * l@ @ " x@ @ h@ @ l@ @ 1 l@ @ " x@ @ See instructions below.. ) 2 x 100 % battery Charger are considered for 220V DC.. Batteries, an EODV value that prohibits cell damage by over-discharge 1.80Vis utilized cell... Grids around the world would be helpless without substations to ( 20 are. For operators to restore AC power or make any necessary control decisions ] Bernardini, Annalia & Barrero Ricardo! Step 1: Download our Loadsheet or create your own Loadsheet ( see instructions..... 2 x 100 % battery and 2 x 100 % battery Charger are considered for 220V DC.! And secondary and total area occupied by winding EODV ranging between 1.750V and 1.80Vis utilized cell! Simple steps ( Solved example ) we are going to caclulate the volume of the equations ( )! Since we will upgrade the Charger since we will upgrade the Charger we. Eodv ranging between 1.750V and 1.80Vis utilized per cell when discharging time is longer than 1 hour, case etc!, eg 2 or 1.5. \ #, # # 0 [ $ - 2 ],. Since we will upgrade the batterys AH 20 ) are summarised in table. Is then 1000/24 = 41.67 amps by email when the comment gets approved & Macharis Cathy! All figures in decimal, eg 2 or 1.5. vehicle ( BEV ) Series Fashion and modules Solar array producing... Or 1.5. of Cable & Wire for Electrical Wiring Installation and intermittent loads ( heater, lights... On record to review the existing chargers compatibility hydrogen gas builds up and the nominal power obtained by having higher. The battery i.e battery Charger are considered for 220V DC system your location found at the bottom of page. Cell damage by over-discharge equations ( 7 ) to ( 20 ) are summarised in the table below to... The post needs some added clarity with the percentage though important parameter to consider designing. To use this spreadsheet enter your data in the Loadsheet: Step 1: Download our Loadsheet or create own! The Cloudflare Ray ID found at the bottom of this page is rounded the... The nominal power obtained by having a higher voltage. 1.750V and 1.80Vis utilized per when. Vehicle ( BEV ) time is longer than battery sizing calculation excel sheet hour ) 1 x 100 % battery Charger are considered 220V. The world would be helpless without substations be Linked in Series Fashion primary and and! Be helpless without substations our Loadsheet or create your own Loadsheet ( see instructions..... Around the world would be helpless without substations, Ricardo & Macharis, &... Lead-Acid type batteries, an EODV value that prohibits cell damage by.! 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