电池计算公式

1、一、估算法1、计算蓄电池的最大放电电流值：I最大二Pcos巾/ "*E临界*N）注：P - UPS电源的标称输出功率cos力一 UPS电源的输出功率因数Y 一 UPS逆变器的效率E临界 一蓄电池组的临界放电电压（12V电池约为10.5V , 2V电池约为1.75V ）N 一每组电池的数量2、根据所选的蓄电池组的后备时间，查出所需的电池组的放电速率值C,然后根据：电池组的标称容量=I最大/C计算出电池的标称容量。3、由于使用E临界一一电池的最低临界放电电压值，所以会导致所要求的电池组的标称容量偏大的局面。按目前的使用经验，实际电池组的实际容量可按下面公式计算：实际电池容量（AH）=电池

2、组的标称容量*0.754、时间与放电速率 C表：5'10'15'20'30'60'1.5h2h3.5C2.4C1.98C1.49C0.92C0.61C0.5C0.42C3h4h5h6h7h8h9h10h0.29C0.19C0.17C0.15C0.13C0.12C0.11C0.09C5、修正 UPS 系统实际电池容量计算方法：实际电池容量(AH ) =功率*功率因数*0.75/ UPS 逆变器的效率/蓄电池组的临界放电电压 /每组电池的数量/放电速率例如：本方案 UPS 系统后备时间所需电池容量计算：3KVA UPS 系统单机满负载后备时间为8 小

3、时。注：功率=3KVA ；功率因数=0.8 ； UPS 逆变器的效率=0.9；蓄电池组的临界放电电压=10.5；每组电池的数量=4； 8 小时放电速率=0.12C ；本方案3KVAUPS 满载延时8小时所需电池容量 =3000 X0.8 X0.75用.9勺0.5 F礼.12P396.83AH综合上述计算，本方案配置的实际电池容量选定为400AH ， 即 4组共计 16 节 12V100AH电池。二、恒功率法采用恒功率法(查表法)这种方法比较简便，根据蓄电池恒功率放电参数可以快速准确地选出蓄电池的型号。该方法是能量守恒定律的体现，蓄电池提供的功等于后者稍大于负荷消耗功。即：W 负荷w K*Pnc

4、 , P 负荷w P(W)首先计算在后备时间内，每个2v 单体电池至少应向UPS 提供的功率Pnc。计算公式：已知 P (W) =P (VA) *Pf/ r ; Pnc=P (W) / (N*n*K)所以：Pnc=P (VA) *Pf/ (r*N*n*K)公式说明:P(W)电池组提供的总功率P(VA)UPS标称容量（VA）PfUPS功率因子刀逆变器转换效率Pnc每cell需要提供的功率n机器配置的电池数量N单体电池cell数Vmin电池单体终止电压K电池并联组数我们可以在电池厂家提供的Vmin下的恒功率放电参数表中，找出等于或者稍大于 Pnc的功率值，这一功率值所对应的型号即能够满足UPS系统

5、的要求。如果表中所列的功率值均小于Pnc.可以通过多组电池并联的方式达到要求。本项目所选用的电池，按照招标要求，采用阀控式密封免维护铅酸蓄电池。参数表如下：电池型V持止电M i及格15曜降成肚放电即 30_.功,W)时分忡4560234M 他4本就电酬率 处明间(,心 6<W>H)81020GM1即 (SVTODAHj1 85V149.512S.11M.9照国5844.S3627.222219W.11 60V190 6i3fi.e112911WJ64793723 323 21091041.75V213149.512097 5644fl.5阴929.52X72021061.TOV23

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