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深圳神火手电筒厂家今天介绍下有关18650锂电池的知识

 

18650锂电池 简介


1. 尺寸
  18650这几个数字,代表外表尺寸:18指电池直径18.0mm 650指电池高度65.0mm。


2、18650八极锂电池的种类:
  18650电池分为锂离子电池和镍氢电池


3、电压及容量规格:
  镍氢电池电压为1.2V常见容量为4500MAH锂离子电池电压为3.6V常见容量为1500MAH-2600MAH


4. 18650锂电池 3.7V和4.2V的区别
  锂电池标3.7V或4.2V,是一回事。只是生产厂商标注的不一样而己。3.7V 指电池使用过程中放电的平台电压,而4.2伏指的是充电满电时的电压。常见的可充18650锂电池,电压都是标3.6或者3.7v,充满电的时候是4.2v,这跟电量(容量)关系不大,18650电池从1200mah到2600mah,甚至有标2800或3000mah都有)3.7V是指电池电用完时的最低电压.   一般认为将锂电池的空载电压放到3.7V就认为电用完了   锂电池放电不能将空载电压放到3.7V以下的,否则会损害电池   4.2V是电池充电的最高限制电压,   一般认为将锂电池的空载电压充到4.2V就认为电充满了   电池充电过程中,电池的电压在3.7V逐渐上升到4.2V   锂电池充电不能将空载电压充到4.2V以上的,否则也会损害电池   这就是锂电池特殊的地方

 

18650电池用途
  可以使用放电时间是3-4个小时,循环充电500次。常用在强光手电筒,头灯,移动医用设备等方面。还可以组合起来!18650现在多用于笔记本电池上,还有一些强光手电也在用它,当然,18650性能是非常优异的,所以只要容量和电压合适,是比其它材料的电池要优良很多的。。。手电,MP3,对讲机,手机。只要电压在3.5--5V的电器都可以用。 
 18650电池和5号电池的区别
  18650的意思是,直径18毫米,长650毫米   而5号电池的型号是14500,直径14毫米,长500毫米   一般18650的电池在工业上用的比较多,民用的很少,常见的也就在笔记本电池和高档手电上用的比较多~~   18650只是电池的尺寸型号,根据电池种类还能分为,锂离子的18650,磷酸铁锂的18650,镍氢的18650(很少见),目前常见的18650是锂离子的。锂电池(Li-ion,Lithium Ion Battery)定义
锂电池
锂离子电池定义
  (Li-ion,Lithium Ion Battery):锂离子电池具有重量轻、容量大、无记忆效应等优点,因而得到了普遍应用——现在的许多数码设备都采用了锂离子电池作电源,尽管其价格相对来说比较昂贵。锂离子电池的能量密度很高,它的容量是同重量的镍氢电池的1.5~2倍,而且具有很低的自放电率。此外,锂离子电池几乎没有“记忆效应”以及不含有毒物质等优点也是它广泛应用的重要原因。 另外请注意锂电池外部一般标有英文7.2V lithiumion battery(锂电池)或7.2V lithium secondary battery(锂二次电池)、7.2V lithiumion rechargeable battery(充电锂电池),所以用户在购买电池时一定要看清电池块外表的标志,防止因为没有看清电池类型而将镉镍、氢镍电池误认为锂电池。
锂电池充电
  锂电池充电控制是分为两个阶段的,第一阶段是恒流充电,在电池电压低于4.2V时,充电器会以恒定电流充电。  18650充电锂电池


第二阶段是恒压充电阶段,当电池电压达到4.2V时,由于锂电池特性,如果电压再高,就会损坏,充电器会将电压固定在4.2V,充电电流会逐步减小,当电流减小到一定值时(一般是1/10设置电流时),切断充电电路,充电完成指示灯亮,充电完成。目前很多充电器都是用的廉价的方案实现的,在控制精度上不够好,容易造成电池充电异常,甚至损坏电池。
编辑本段一般配置
  单节标称电压一般为:3.6V 或3.7V   充电电压一般为:4.20V   最小放电终止电压一般为: 2.75V ,低于这个电压容易导致电池容量严重下降乃至报废   最大充电终止电压:4.20V   直径:18±0.2mm   高度:65±2.0mm   容量:1000mAh以上,有些品牌会标上3600mAh或4500mAh等惊人的容量,但实际容量是达不到的,目前18650电池容量做得最高的是松下,能做到3100mAh,但价格也不低。

 

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18650 lithium batteries Profile
 
1 Size
18650 few figures, representing the appearance size: 18 refers to the battery diameter 18.0mm 650 battery height 65.0mm.
 
2,18650 octupole lithium battery types:
18650 battery is divided into lithium-ion batteries and nickel-metal hydride battery
 
3, the voltage and capacity specifications:
The nickel-metal hydride battery voltage of 1.2V common capacity 4500MAH lithium-ion battery voltage to 3.6V common capacity 1500MAH-2600MAH
 
The difference between 4.18650 lithium battery 3.7V and 4.2V
Lithium battery labeled 3.7V or 4.2V, is one thing. Only manufacturers label not as yourself. 3.7V means discharge platform in the battery during the voltage, and 4.2 volts is the charging voltage when the full power. Are standard 3.6 or 3.7v the common rechargeable 18650 lithium battery, the voltage when fully charged is 4.2v, this has little to do with electricity (capacity) 18650 battery from 1200mah to 2600mah standard 2800 or 3000mah have even otherwise it will undermine) 3.7V minimum voltage when the battery runs out. generally believed that the no-load voltage of the lithium battery on the 3.7V that run out of power lithium battery discharge can not be placed in the no-load voltage 3.7V or less battery 4.2V is limited to a maximum voltage battery charging, no-load voltage of the lithium battery is generally believed that the full power charge to 4.2V battery is charging, the battery voltage is gradually increased in 3.7V to 4.2V lithium battery charging can not be no-load voltage charge to 4.2V, otherwise it will damage the battery which is lithium batteries special place
 
18650 battery use
Can use the discharge time is 3-4 hours, the charge cycle 500 times. Commonly used in bright flashlight, headlamp, mobile medical equipment. Can also be combined! 18650 used for laptop batteries, there are some bright flashlight also use it, of course, the 18650 performance is very excellent, so long as the appropriate capacity and voltage battery than other materials to be excellent, many. . . Flashlight, MP3, walkie-talkies, mobile phones. Can be used as long as the voltage in the 3.5 - 5V appliances. 18650 battery and battery difference
18650 mean, 18 mm in diameter and 650 mm long and the 5th battery model 14500, 14 mm in diameter, the general 18650 500 mm long battery industry with more civilian few common also in more laptop batteries and high-end flashlight ~ ~ 18650 is just the size of the battery model, battery types can be divided into 18650 lithium-ion, lithium iron phosphate, 18650, and 18650 of the nickel-metal hydride (rare), the current common The 18650 is a lithium ion. The definition of a lithium battery (Li-ion, Lithium Ion Battery)
Lithium battery
Lithium-ion battery is defined
(Li-ion, Lithium Ion Battery): lithium-ion battery with light weight, large capacity, no memory effect, etc., which have been widely applications - many digital devices using lithium-ion batteries for power, even though its price relatively expensive. The high energy density of the lithium-ion battery, its capacity is 1.5 to 2 times the same weight of nickel-metal hydride batteries, and has a very low self-discharge rate. In addition, almost no "memory effect" and does not contain toxic substances, etc. is also an important reason for it is widely used in lithium-ion battery. Also note that the general standard of lithium battery external English 7.2V lithiumion battery (lithium battery) or 7.2V lithium secondary battery (lithium secondary battery), 7.2V lithiumion rechargeable battery (rechargeable lithium battery), so the user must buy batteries to see the battery block the appearance of signs, to prevent the lithium battery did not see the type of battery, nickel-cadmium, nickel hydrogen batteries mistaken.
Rechargeable lithium battery
Li-ion battery charging control is divided into two phases, the first phase of constant current charging, the battery voltage is lower than 4.2V, the charger will charge constant current. 18650 rechargeable lithium battery
 
The second phase is the constant-voltage charging phase, when the battery voltage reaches 4.2V, because the lithium battery characteristics, if the voltage is again high, it will damage the charger will voltage fixed at 4.2V, and the charging current gradually decreases, when the current decreases to a certain value (typically when the current of 1/10 is provided), to cut off the charging circuit, the charge completion indicator light, charging is complete. Many chargers are cheap program, the control precision is not good enough, is likely to cause the battery does not charge, or even damage to the battery.
Edit this section general configuration
Single nominal voltage is generally: general 3.6V or 3.7V charge voltage: 4.20V minimum discharge termination voltage is generally: 2.75V below this voltage easily lead to a serious decline in battery capacity and even scrapped maximum charge termination voltage: 4.20V diameter : 18 ± 0.2mm height: 65 ± 2.0mm Capacity: 1000mAh some brand monogram on the amazing capacity of 3600mAh or 4500mAh, but the actual capacity is unattainable, doing the highest capacity 18650 battery Panasonic can do 3100mAh, but the price is not low.
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