How many 48 lithium batteries do you need for 18650ah

Under normal circumstances, about 4 to 6 should be needed, which is relatively normal and within a reasonable range, which can achieve a very good use effect.

Lithium batteries are a class of metals made from lithium.

or lithium alloy as a positive and negative electrode material.

Batteries that use non-aqueous electrolyte solutions. In 1912, lithium metal batteries were first developed by Gilbert NLewis proposed and studied.

In the 70s of the 20th century, m s.Whittingham proposed and began research on lithium-ion batteries.

Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream.

1) "Vehicle" means motor vehicle and non-motor vehicle.

2) "Motor vehicle" refers to a wheeled vehicle that is driven or towed by a power unit and driven on the road for personnel or for transporting goods and carrying out special engineering operations.

3) "Non-motorized vehicle" refers to a vehicle driven by human or animal power on the road.

and motorized wheelchairs and electric bicycles for the disabled that are driven by power units but are designed to meet the relevant national standards in terms of maximum speed, empty mass and dimensions.

and other means of transportation.

The battery of electric lithium electric vehicle battery 48V12Ah is used as the basis for the combination of battery packs, and the combination method is as follows:

1 x 18650 lithium rechargeable battery, i.e. the battery has multiple capacity specifications, in this case it is assumed to be 2000mAh).

Voltage conditions: 13 cells are required to be connected in series as a voltage group, the total voltage, and its capacity is still 2ah;

Capacity conditions: 6 x 2Ah = 12Ah, that is, 6 voltage banks need to be connected in parallel to expand to 12Ah;

In short: a total of 78 18650 batteries are required. Among them, every 13 are connected in series to make up 48V voltage as a voltage group, and 6 voltage groups are connected in parallel to meet the needs of 12ha capacity.

Note 1: The unit of capacity here is Ah (Ampere-hour), not the unit of current A (A).

Note 2: The size of the capacity is not only about durability, but also about the power needs, otherwise the power will be insufficient due to insufficient power.

To look at the parameters of 18650, to calculate, it takes 10 to reach 20ah, and 48 strings to reach the voltage of 48v, that is, 130.

The capacity of the single cell is 3400 mAh, and it is composed of 13 strings and 3 parallels, which requires 46 batteries.

You need 13 cells in series, because the 18650 specification is too many, but generally at 2A per section, if you need 12A of current, you need 2A batteries to calculate, you need 6 cells together, a total of 78 18650 batteries.

The more common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The voltage of lithium-ion battery is and, and the voltage of lithium iron phosphate battery is usually 1200mah-3000mah, and the more common capacity is 2200mah-3600mah.

Considering that the size of the 18650 lithium battery pack is fixed, the best stability consistency is the capacity range of 2600 3000mah, if it is a lithium battery pack, it is best not to use the highest capacity, regardless of the cost performance and the service life of the battery pack after the group is not very cost-effective, so it is not that the higher the capacity of the cell, the more stable and long-term the use.

18650 lithium battery precautions.

Don't mix batteries, choose batteries with consistent performance. When the battery is low, replace all the batteries. When used in series, the same type of battery is used.

Pay attention to the polarity of the battery. If the polarity of one cell is reversed, the voltage of the entire string of cells will be reduced, not increased.

Keep the battery's connection points clean. When four batteries are connected in series, there are a total of eight connection points (the connection point from the battery compartment to the battery compartment and the connection point from the battery compartment to the next battery). Each connection point has a certain resistance, and if you increase the connection point, it may affect the performance of the entire battery pack.

The 18650 lithium battery has a maximum of 3000 mAh, while the lithium iron phosphate battery can reach 10000 mAh current. These two types of batteries also have different voltages and currents. (And the discharge currents are different.)

While big manufacturers like Panasonic Sanyo can reach 3400mA, in fact, they were unable to reach 3400mA in their tests. Compared to polymer batteries, the 18650 lithium-ion battery is relatively standard, and the capacity does not change much. In most cases, the capacity of an 18650 lithium-ion battery is usually 1200mAh3350mAh; There are also some ordinary capacities that are just the size of the battery, which can be divided into lithium-ion 18650, lithium iron phosphate 18650, nickel-metal hydride 18650 and so on according to the type of battery.

18650 cells, single cell is.

48 pcs, round 13 pcs.

For example, if a single cell of 18650 is 2000 mAh, 20 ampere, 2 = 10.

13x 10=130pcs.

Actually, I'm also here to find this answer, I thought about it, I don't know if it's right, a section of 18650, for example, is 3000 mAh, which is 3ah, and a 18650 battery is the standard voltage after being fully charged. You are talking about electric vehicle batteries, electric vehicles are 4 batteries are also 80A, one battery of electric vehicles can be replaced by 7 18650 batteries, electric vehicles need 4 batteries, that is, 28 batteries 18650 battery capacity is 84A, 28 batteries standard voltage 100V after full charge of the voltage. There is also a voltage too high to press what version I forgot.

48 branches), 20a 2a=10 (group). 13*10=130 (branches). To assemble a set of 48-volt 20-ampere lithium batteries, you need 130 volt 2000 mAh 18650 lithium batteries, and you also need a 13-wire lithium battery control version (Taobao price is 50 yuan).

To add that, 130 18650 batteries (capacity type, power type) are required; However, it also depends on what equipment is used specifically, and there are also boost schemes.

130 pcs of 18650 batteries are required to assemble a set of 48 volt 20 amp lithium batteries.

About 1200 yuan. Lithium battery specification: 48V-20Ah

Battery series mode: 13 series connection;

Battery paralleling mode: 8 in parallel;

Actual battery capacity: 21ah;

Lithium battery price: 1350 yuan;

Maximum battery voltage: volts;

Minimum battery voltage: volts;

Battery range: 50 km - 70 km;

Measured cruising range: km.

First, the problem of ambient temperature.

For the use of rechargeable batteries, the influence of ambient temperature on battery life is often ignored, in the environment where the temperature is too high or too low, the self-discharge rate of the battery will be much higher, especially the high temperature will greatly reduce the life of the battery, so you need to communicate with the engineer as much as possible before buying, and give your own equipment or environment, so that the performance of the battery can be better played.

2. Whether the lithium iron phosphate battery is equipped with a safety protection circuit board.

Without a protective circuit board, the lithium battery is in danger of deformation, leakage, and leakage. Under the vicious price cutting competition, each company seeks a lower price to protect the circuit board, or omits this device at all, making the market full of dangerous lithium batteries. Consumers can't tell if there is a protective circuit board from the appearance, so it is best to choose a reputable merchant to buy it.

There are many brands of lithium batteries on the Internet with 48V20A, and the online price is about 1200 yuan.

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