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什么是干电池 型号和原理是什么一节干电池的电压是多少 What is a dry battery, what is the model and principle, what is the volta
Time:2022-08-30 14:26:25        Hits:【 】second

什么是干电池

干电池(Drycell)是一种以糊状电解液来产生直流电的化学电池(湿电池则为使用液态电解液的化学电池),大致上分

为一次电池及二次电池两种,是日常生活之中为普谝使用,以及轻便的电池,它们可以使用于很多电器用品上。

一节干电池的电压是多少

一般干电池的电压是1.5V,电流的大小与负载有关,遵循欧姆定律|=U/R。

干电池工作原理

锌锰干电池是日常生活中常用的干电池。

正极材料:MnO2、石墨棒

负极材料:锌片

电解质:NH4CI、ZnCI2及淀粉糊状物

电池符号可表示为(-)Zn|ZnCI2、NH4CI(糊状)IMnO2|C(石墨)(+)

负极:Zn=Zn2++2e

正极:2MnO2+2NH4++2e=Mn203+2NH3+H20

总反应:Zn+2MnO2+2NH4+=Zn2++Mn23+2NH3+H20

锌锰干电池的电动势为1.5V。因产生的NH3气被石墨吸附,引起电动势下降较快,如果用高导电的糊状KOH代替

NH4C],正极材料改用钢简,MnO2层紧靠钢简,就构成碱性锌锰干电池,由干电池反应没有气体产生,内电阻较低,电动势

为1.5V,比较稳定。

干电池属于化学电源中的原电池,是一种一次性电池,它以二氧化锰为正极,以锌筒为负极,把化学能转变为电能供给外

电路。在化学反应中由于锌比锰活泼,锌失去电子被氧化,锰得到电子被还原。

常见干电池型号、尺寸对照表

平头,指的是电池正极是平的,没有突起,使用做电池组点焊使用的电池芯,一般同等型号尖头的(可以用作单体电池供

电的),在高度上就多了0.5mm。以此类推,我不逐一解释。还有,电池很多的时候并不是规规矩矩的"AAA,AA,A.

SC.C.D.N.F"这些主型号,前面还时常有分数“1/3,2/3,1/2,2/3,4/5,5/4,7/5",这些分数表示的是池体相应的

高度,例如"2/3AA"就是表示高是一般AA电池的2/3的充电电池;再如“4/5A"就是表示高是一般A电池的4/5的充电电池

锂离子电池芯型号、尺寸

(1)圆柱型锂离子电池芯:通常用五位数字表示,前两位数字是指池体直径,后三位数字是指池体高,例如14500就是

指AA电池,即大约14mm直径50mm高。常见的型号:14500,14650,17490,18500,18650,26500

常见比克、三洋圆柱电芯规格型号:

比克18650 2200mAh 37V.比克18650 2600mAh37V,比克18650 2000mAh36V三元长寿命

三洋18650 2100mAh 37V,三洋18650 2500mAh37V,三洋18650 1500 mAh 37V18650

(2)方型锂离子电池芯:通常用六位数字表示,分别表示电池的厚度、宽度和高度,单位空米,例如103450即10(厚

度)x34(宽度)x50(高度)mm若厚度数值大于宽度数值,则厚度要*0.1,例如433861即4.3 (43*0.1)x38x61mm


What is a dry battery


A dry cell is a chemical battery that uses a paste electrolyte to generate direct current (a wet battery is a chemical battery that uses a liquid electrolyte).


There are two kinds of primary batteries and secondary batteries, which are commonly used in daily life, and lightweight batteries, which can be used in many electrical appliances.


What is the voltage of a dry battery


Generally, the voltage of the dry battery is 1.5V, and the magnitude of the current is related to the load, following Ohm's law |=U/R.


How dry batteries work


Zinc-manganese dry batteries are commonly used dry batteries in daily life.


Positive electrode material: MnO2, graphite rod


Negative electrode material: Zinc sheet


Electrolytes: NH4CI, ZnCI2 and starch paste


The battery symbol can be expressed as (-)Zn|ZnCI2, NH4CI(paste)IMnO2|C(graphite)(+)


Negative electrode: Zn=Zn2++2e


Positive electrode: 2MnO2+2NH4++2e=Mn203+2NH3+H20


Overall reaction: Zn+2MnO2+2NH4+=Zn2++Mn23+2NH3+H20


The electromotive force of the zinc-manganese dry cell is 1.5V. Because the generated NH3 gas is adsorbed by the graphite, the electromotive force drops rapidly, and if it is replaced by a highly conductive paste KOH


NH4C], the positive electrode material is changed to steel, and the MnO2 layer is close to the steel to form an alkaline zinc-manganese dry battery. There is no gas generated by the reaction of the dry battery, the internal resistance is low, and the electromotive force is low.


It is 1.5V, which is relatively stable.


Dry battery belongs to the primary battery in chemical power supply. It is a kind of disposable battery. It uses manganese dioxide as positive electrode and zinc cylinder as negative electrode to convert chemical energy into electrical energy for external supply.


circuit. In the chemical reaction, since zinc is more active than manganese, zinc loses electrons and is oxidized, and manganese gains electrons and is reduced.


Common dry battery model and size comparison table


Flat head means that the positive electrode of the battery is flat and has no protrusions. It uses the battery cell used for spot welding of the battery pack. Generally, the same type has a pointed end (which can be used as a single battery for power supply).


Electric), 0.5mm more in height. By analogy, I will not explain them one by one. Also, when there are many batteries, it is not a regular "AAA, AA, A.


SC.C.D.N.F" these main models are often preceded by scores "1/3, 2/3, 1/2, 2/3, 4/5, 5/4, 7/5", these scores indicate the pool body corresponding


Height, for example, "2/3AA" means a rechargeable battery whose height is 2/3 of that of an ordinary AA battery; another example, "4/5A" means a rechargeable battery whose height is 4/5 that of an ordinary A battery.


Lithium-ion battery cell model and size


(1) Cylindrical lithium-ion battery cell: usually represented by five digits, the first two digits refer to the diameter of the cell body, and the last three digits refer to the height of the cell body, for example, 14500 is


Refers to AA batteries, i.e. approximately 14mm in diameter and 50mm in height. Common models: 14500, 14650, 17490, 18500, 18650, 26500


Common BAK and Sanyo cylindrical battery specifications and models:


BAK 18650 2200mAh 37V. BAK 18650 2600mAh37V, BAK 18650 2000mAh36V ternary long life


Sanyo 18650 2100mAh 37V, Sanyo 18650 2500mAh37V, Sanyo 18650 1500mAh 37V18650


(2) Square lithium-ion battery cell: usually represented by six-digit numbers, representing the thickness, width and height of the battery respectively, in units of empty meters, such as 103450 or 10 (thickness)


Degree)x34(width)x50(height)mm If the thickness value is greater than the width value, the thickness should be *0.1, for example, 433861 is 4.3 (43*0.1)x38x61mm


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