Disadvantages of 1.5V lithium battery

Downside is that it is not a pure battery, joined the step-down voltage stabilizing circuit, charging circuit, these costs are to consumers, and load cell volume and capacity is much smaller than pure battery of the same size and material. Cannot control, another is capacity before the run out of electricity, you don't know how it has power, you can't judge capacity by measuring the voltage.

Standard single lithium battery voltage is 3.5 V, this is determined by the voltage characteristics of the lithium battery materials, so if you make it 1.5 v lithium-ion battery is the need to design a special voltage regulation circuit to achieve. This is not a defect, is designed according to user's demand, after all, everyone everyday use of the battery voltage is 1.5 V.

1.5 V lithium battery weaknesses? What do you mean? That is afraid of the high temperature can not be put into the fire burning.

This is because the lithium battery voltage platform in 1.2 V or 1.5 V. What is the voltage platform? If we put the battery discharge time to do a curve and the measured voltage, discharge on the curve part - time going on, but the measured voltage basic remain unchanged. This discharge platform is what we need, because the electrical appliances like discharge time continues, but maintain a constant voltage; At this stage, the battery can be nearly as a constant voltage source. In fact, the smooth degree and the duration of the discharge platform is one of the important indices for evaluation of battery performance. And can be seen as the working voltage of the battery discharge platform. Back to the original poster: lithium-ion batteries due to its inherent properties of materials, its discharge platform (working voltage) remain at around 3.6 V, such a high discharge platform is lithium battery can replace the lead acid, nickel metal hydride generation on the key factors of the battery. Just think, if you need 36 v drive storage battery, with 10 lithium batteries in series is enough, lead-acid section 24.10 section and, in fact, the weight of the lithium battery to less than the weight of 24 lead-acid batteries, which is why the lithium battery electric vehicles can do much lighter. So, need 1.5 V battery, with nickel metal hydride, lithium battery can't do this range.

If there is any better than this, just like ordinary 1.5 V battery, have to 18 V of the...The cylinder...

Do you have any??Not only can pull ~ please find geological are on sale in Taobao, thank you

Battery voltage depends on the electrode potential difference of material, single section lead-acid storage battery voltage is 2 V, single section nickel cadmium rechargeable battery voltage of 1.2 V, single section nickel metal hydride rechargeable battery voltage of 1.2 V, single section polymer lithium battery voltage of 3.7 V, single section lithium iron phosphate battery 3.2 V, the battery you want series-parallel can get by the battery. Battery voltage depends on the energy storage material, has nothing to do with the quality.

Like a bad buy on the market, with sections 9 volt series, transform yourself, don't use ballast ballast tubes, carved with circuit diagram. Hope to adopt

18650 is the ancestor of lithium ion battery - Japan's SONY company in order to save costs and set a standard of lithium ion battery model, including 18 said to 18 mm in diameter, 65 said length is 65 mm, 0 means for cylindrical batteries.

Common batteries are divided into 18650 lithium ion battery, lithium iron phosphate batteries. For the nominal voltage of 3.7 v lithium ion battery voltage, charging by the voltage is 4.2 v, the nominal voltage of 3.2 v lithium iron phosphate battery, charge cut-off voltage of 3.6 v, the capacity is 1200 mAh - 1200 mAh, usually common capacity is 2200 mAh - 2600 mAh

Lithium battery (Li - ion, Lithium Ion Battery) : lithium ion battery has a light weight, large capacity, no memory effect, etc., thus obtained

18650 lithium batteries

18650 lithium batteries

Widespread application - many digital devices are used the lithium ion battery as a power source, although its price is relatively expensive. High energy density lithium ion battery, its capacity is the same weight of 1.5 to 2 times of Ni-Mh batteries, and have very low self-discharge rate. In addition, the lithium ion battery has almost no "memory effect", and does not contain toxic substances etc also is the main reason that it is widely used. Also please note that the lithium battery external generally marked with English 4.2 V lithium ion battery V lithium secondary battery (lithium battery) or 4.2 (lithium secondary battery), 4.2 V lithium ion rechargeable battery (rechargeable lithium battery), so the user must see when buying batteries battery block appearance, prevent because they didn't see the battery type and cadmium nickel, nickel-metal hydride batteries will be mistaken for lithium batteries.

Standard 3.7 V or 4.2 V lithium-ion batteries are the same. Manufacturers of different and just yourself.3.7 V means the battery discharge platform in the process of voltage (i.e., a typical voltage), and 4.2 V refers to the charging full of electric voltage. Common 18650 rechargeable lithium battery, the voltage is 3.6 or 3.7 v, the charge is 4.2 v, this has very little to do with power (capacity), 18650 battery capacity of mainstream mAh from 1800 to 2600 mAh, (18650 power battery capacity in 2200 ~ 2600 mAh), the capacity of the mainstream and even more than the 3500 or 4000 mAh has (remind everybody, above the nominal 3350 mAh on the market of domestic batteries are likely to false, the current domestic production of the maximum capacity is 3350 mAh.).

Generally believed to be the no-load voltage of lithium-ion batteries in the 3.0 V is considered under the electricity used up (a specific threshold value needs to see battery protection board, such as low to 2.8 V, there is also a 3.2 V).Most of the lithium battery discharge cannot be under no-load voltage to 3.2 V, or excessive discharge will damage the battery (lithium batteries on the market commonly basic is belt protection board to use, so the excessive discharge can also lead to detect the battery protection board, thus unable to recharge the battery).4.2 V is the highest limit of the battery voltage, it is generally believed to the no-load voltage of lithium-ion batteries charged to 4.2 V is considered the electricity, the battery charging process, the battery voltage rise gradually in 3.7 V to 4.2 V, lithium batteries cannot be no-load voltage to over 4.2 V, otherwise will damage the battery, this is the place where special lithium-ion batteries.

18650 battery life theory as the charging circuit 1000 times. As the density of the unit capacity is very big, so most used for laptop batteries, in addition to

18650 lithium batteries

18650 lithium batteries

This, because 18650 stable performance is very good in the work, the major are widely used in the electronics field: commonly used in high-grade light flashlight, portable power, wireless data transmission, electric thermal clothing, shoes and portable instruments and meters, portable lighting, portable printers, industrial equipment, medical equipment, etc.

18650 mean, 18 mm in diameter, 65 mm long. And 5 battery model is 14500, diameter of 14 mm, 50 mm long. General 18650 batteries in industry, with more civilian rarely, common in laptop batteries and use more high-end flashlight.

18650 is just the size of the battery model, according to the types of batteries can also be divided into, lithium ion, 18650, 18650 of the lithium iron phosphate, 18650 (rare), nickel metal hydride is common 18650 lithium ion.

The working principle of lithium-ion battery is refers to the principle of charging and discharging. When charging the battery, battery has lithium ions generated in the anode, the generated lithium

18650 lithium batteries

18650 lithium batteries

Ion goes through the electrolyte to the negative movement. As a cathode carbon layer structure, it has many pores, arrived in the cathode of lithium ion is embedded into the microporous carbon layer, the embedded lithium ion, the more the higher the charge capacity.

Likewise, when to discharge the battery (i.e., we use the battery process), embedded in the cathode carbon layer of emergence, lithium ions and movement back to the anode. Back to the anode of lithium ion, the more the higher the discharge capacity. We usually mean by battery capacity is the discharge capacity.

It is not hard to see, in the process of charging and discharging lithium ion batteries, lithium ion in the motion state from the positive and negative to the anode. If we compared the image of the lithium ion battery as a rocking chair, rocking chair at both ends of the poles for the battery, and lithium ion as excellent athlete, running to and fro in the ends of the rocking chair. So, the experts gave lithium ion battery rocking-chair batteries a cute name.

Charge and discharge process

Lithium battery charging control is divided into two phases, the first stage is the constant current charging, the battery voltage is lower than 4.2 V, the charger will be at a constant current. The second stage is the constant voltage charging stage, when the battery voltage is 4.2 V, due to the lithium battery characteristics, if the voltage is high, will damage, the charger voltage will be fixed in 4.2 V, the charging current will be reduced gradually, when the current decreases to a certain value (usually 1/10 set current), to cut off the charging circuit, a complete charging indicator, charging is complete.

Lithium ion battery over charge and discharge can cause permanent damage to is negative. Lead to excessive discharge cathode carbon layer structure appeared to collapse, and failures can cause

18650 lithium battery charger

18650 lithium battery charger

In the process of charging lithium ion can't insert; Overcharge lithium ion anode carbon embedded structure of too much, and cause some of the lithium ion can no longer be released.

Some charger use cheap plan implementation, on the control accuracy is not good enough, easy to cause the battery is unusual, even damage the battery. The charger when choose and buy as far as possible choose a big brand of 18650 lithium-ion battery charger, guaranteed quality and after-sale, prolong the service life of batteries. Brand protection 18650 lithium ion battery charger has four heavy protection: short circuit protection, over current protection, over-voltage protection, the battery reverse connect protection function, etc. Over charging protection: when the charger for lithium ion battery charging, in order to prevent due to temperature rise caused by internal pressure rise, need to terminate the charging status. Therefore, protection device monitor the battery voltage, when it arrived in battery charging pressure, namely activation over charging protection function, to suspend the charge. Over discharge protection: to prevent the lithium ion battery over discharge state, when lithium ion battery voltage is lower than the discharge voltage testing point, namely the activation over discharge protection, suspend the discharge, and keep the battery in low static current standby mode. Over current and short circuit protection: when the lithium ion battery discharge current is too large or short circuit occurs, the protection device will activate the over current protection function.

The page contains the contents of the machine translation.