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Reject the positive and negative electrode materials of the battery. The voltage of common positive electrode materials such as lithium cobalt oxide and lithium manganese oxide is around 3.7, while that of lithium iron phosphate is around 3.2. The common negative electrode material graphite has a voltage of around 0, while lithium titanate has a voltage of around 1.2. Subtracting positive and negative electrodes is the battery voltage

Depending on your electrical appliances, the voltage of a single lithium battery is generally 3.7V (3.2V for the positive electrode of lithium iron phosphate), while mobile phone lithium batteries are generally 3.7V and laptops are generally 11.1V

Firstly, it depends on what type of lithium battery you are, whether it is a 3.2V power battery made of lithium iron phosphate or a regular 3.7V capacity battery. It depends on what type of battery you are referring to as a 48V20A, which is typically used in electric vehicles. Therefore, its upper limit charging voltage should be 54.75V and the lowest discharge voltage should be 30V.

Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution, invented by Edison. The reaction equation for battery application is: Li+MnO2=LiMnO2. This reaction is an oxidation-reduction reaction, followed by discharge. In the past, due to the highly reactive chemical properties of lithium metal, which required high processing, storage, and environmental standards, lithium batteries were not widely used for a long time. With the development of modern science, lithium batteries have now become mainstream. On February 22, 2016, the International Civil Aviation Organization announced a ban on checked baggage containing lithium batteries.

Lithium batteries are usually divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. The fifth generation product of rechargeable batteries, lithium metal batteries, was born in 1996. Its safety, specific capacity, self discharge rate, and cost-effectiveness are all superior to lithium-ion batteries.

Firstly, it depends on what type of lithium battery you are, whether it is a 3.2V power battery made of lithium iron phosphate or a regular 3.7V capacity battery. It depends on what type of battery you are referring to as a 48V20A, which is typically used in electric vehicles. Generally, it is a power type battery, so its upper charging voltage should be 54.75V and the lowest discharge voltage should be 30V (batteries below 45V have little charge). The capacity type is fully charged at 54.6V, and the minimum discharge voltage is 31.2V (below 39V, the battery has almost no charge).

It is generally believed that the charging voltage is 1.15 times the rated voltage, and the discharging voltage is 0.9 times the rated voltage.

Taking 48V as an example, the charging voltage is 55. 2V, discharge voltage is 43. 2V

If the discharge current is greater than 3C, it is possible to consider reducing the discharge voltage slightly,

A 3.7V lithium battery is a type of lithium battery with a nominal voltage of 3.7V and a full charge voltage of 4.2V, with capacities ranging from a few hundred to several thousand milliampere hours. Generally used in various instruments, testing equipment, medical instruments, POS machines, laptops and other products.

1> According to appearance:

Cylindrical 3.7V lithium batteries, such as 32650, 26650, 18650, 14650, etc;

Square 3.7V lithium batteries, such as 103450, 523450, 653450, etc;

2> According to capacity:

1800mAh, 2200mAh, 2600mAh, 4400mAh, 6600mAh, etc., among which 4400mAh and 6600mAh are the combined capacities.

3.7V lithium battery capacity, the larger the volume of a single lithium battery, the larger the capacity, or the more lithium batteries are connected in parallel, the larger the capacity. The fundamental electrical formula is: ITotal=I1+I2+I3+In [1]

A single 3.7V lithium battery can be scientifically assembled into lithium battery packs with different voltages and capacities, based on these advantages; Lithium batteries are widely used in:

1. Lithium batteries are used in communication equipment such as communication base stations, handheld road testers, portable communication testers, special communication devices, portable radios, etc;

2. Lithium batteries are used in medical instruments such as monitors, electrocardiographs, portable B-ultrasound machines, ventilators, infusion pumps, oral light curing machines, etc;

3. Lithium batteries are used in industrial instruments such as water quality testing equipment, geotechnical testing equipment, laser pointing devices, vehicle arresters, ground penetrating special equipment, and special search lights;

4. Lithium batteries are used in electric tools such as handheld drills, electric scooters, golf carts, etc;

5. Lithium batteries are applied in consumer electronics such as smart vacuum cleaners, handheld data collectors, financial POS machines, digital products, etc.

Combination method: 513048-1S1P

Nominal voltage: 3.7V

Nominal capacity: 850mAh

Standard discharge continuous current: 0.2C

Maximum discharge continuous current: 1C

Working temperature: Charging: 0~45 ℃

Discharge: -20~60 ℃

Product size: MAX6 * 31 * 52.5mm

Finished product internal resistance: ≤ 200m Ω

Lead model: JST-ZH-2P positive UL1007/28 #, wire length 30mm

Lithium batteries "are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. The lithium metal battery was first developed by Gilbert N. in 1912 Lewis proposed and studied it. In the 1970s, M.S. Whittingham proposed and began researching lithium-ion batteries. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require very high environmental standards. So, lithium batteries have not been applied for a long time. With the development of science and technology, lithium batteries have now become mainstream.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. The fifth generation product of rechargeable batteries, lithium metal batteries, was born in 1996. Its safety, specific capacity, self discharge rate, and cost-effectiveness are all superior to lithium-ion batteries. Due to its own high-tech requirements, only a few companies from countries are currently producing this type of lithium metal battery. What kind of battery is it? The capacity type lithium manganese oxide and lithium cobalt oxide that we usually use are 4.2-2.7V. Now Sanyo has released a 4.3V 18650 lithium battery, but it is not common. In fact, using voltage closer to the middle is more advantageous. There is also power type lithium iron phosphate, which is generally used in high current discharge situations such as electric tools or model aircraft, with a voltage of 3.2~2V

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