Author ：Iflowpower – Portable Power Station Supplier
The power lithium battery is a power supply for power source, more refers to electric vehicles, electric trains, electric bicycles, and golf carts supply powerful batteries. Its important differences in start batteries for automotive engine boots. Multi-use valve sealing lead-acid battery, open tube lead-acid battery and lithium iron phosphate battery.
The battery is one of the power lithium battery, and its use is to store limited electrical energy, use in a suitable place. Its working principle is to convert chemical energy into electrical energy. It is used as a negative electrode with a lead plate filled with sponge-shaped lead, and the lead plate of the neutral form is positive, and the electrolyte is made by 22 to 28% dilute sulfuric acid.
At charging, electrical energy conversion is chemical, and chemical energy is converted to electrical energy during discharge. When the battery is discharged, the metal lead is a negative electrode, and the oxidation reaction occurs, and is oxidized to a lead of sulfate; the lead is a positive electrode, and the reduction reaction occurs, and is reduced to the lead of sulfate. Battery is charged with DC charge, both poles generate lead and lead.
After removing the power, it returns to the state before the discharge, constitutes a chemical battery. The battery is a battery that can repeatedly charge, discharge, called secondary battery. Its voltage is 2V, usually used in series with three batteries, and the voltage is 6V.
The car is used in a battery pack of 6 batteries. Lithium-ion battery is a class of battery by lithium metal or lithium alloy as a negative electrode material, using a nonaqueous electrolyte solution. Since the chemical properties of lithium metal are very lively, the processing, preservation, use, and environmental requirements of lithium metal are very high.
Therefore, the lithium ion battery has not been applied for a long time. With the development of microelectronics technology in the twentieth century, small-scale equipment is increasing, and the power supply has been highly required. Lithium-ion battery has entered a large-scale practical phase.
What is the power lithium battery and a lithium-ion battery in the battery, can be divided into lead-acid batteries, primary alkaline batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, etc. The battery can be divided into a power lithium battery and a normal battery. The difference between the power lithium battery and the ordinary battery is that the normal battery can be discharged at the maximum 3C current, and the power lithium battery generally refers to currently 5c current.
Discharge, and ultra-high magnification power lithium battery can be discharged at 20c or more current. Therefore, the lithium-ion battery has an ordinary type and power type. There are lead-acid batteries in the power lithium battery, as well as a nickel-hydrogen battery, and a lithium ion battery, etc.
Powerful lithium-ion batteries should consider more reliability and consistency, after all, long, harsh environments (winter low temperature, summer exposure, rain), a large number of battery strings are used in parallel groups. Considering reliability and consistency, assume a car to use 1000 power lithium batteries, ideally, automotive manufacturers hope that there is no problem in the scale of a model of 100,000 vehicles, which is ideally required to require the problem of power lithium battery. Under the one in one million.
Taking into account reliability, power battery is generally designed to reduce more redundant, using thicker diaphragms, foils and horses, so energy density is probably half of consumer batteries. Consumer lithium-ion batteries do not need long reliability, generally do not use alone alone, so there is not much demanding for consistency, but due to consumer mobile phones, PAD space is limited and very precious, so consumer lithium ion batteries about size requirements Strict, capacity, energy density, etc. Regarding security, the power lithium battery has more external protection circuits, heat dissipation layout, etc.
, of course, facing more harsh conditions (higher external voltages, larger current, more complex external environments), consumer batteries Less protection. High-end consumer batteries use the most advanced technology and materials, while the power lithium battery is more advanced process control, consistency control and quality management. 1.
Small capacity of general mobile phones and other electronic products with different capacities. 2. Circular life power also high.
3. In the temperature control point, power will have a protective temperature of the battery pack. The type of lithium-ion battery is much, such as power-based lithium ion battery and capacity lithium ion battery, then what is the difference between these two lithium ion batteries? 1, the voltage size is different in the battery industry, the voltage is increased, and the corresponding output voltage will increase, so that the power-type lithium-ion battery pack can meet some high-power equipment; and the result of directly affected in parallelism is The current of the entire battery pack is increased, and the capacity is affected by the current of the output, so the direct use of parallel is to make the capacity of the lithium-ion battery pack increase, and the capacity of the battery pack connected in this manner is often relatively large.
That is, the so-called capacity lithium ion battery pack. 2, the application of the product is high, the voltage value of large devices is high, because small power battery packs can not work, so the power-type lithium-ion battery pack. For example, the electric bikes we usually use, the voltage value it requires is often 48V, relative to some of our lives, 48V is not small.
Therefore, you must use a power-type lithium-ion battery pack to ensure the operation of the electric bicycle. And we usually go to some large supermarkets or shopping malls, some logos lights, and spare power, because the power consumption of these devices is not very large, so the capacity lithium-ion battery pack is generally used. Between the two, the application is in the application.
different. 3, internal resistance different power-type lithium-ion batteries can be smaller than the capacity lithium-ion battery, with 18650 as an example, 3 magnification discharged good manufacturers generally with PDC, internal resistance 40 or so; 5 magnification discharge Without PDC internal resistance 20. First of all, if you are in terms of durability, it is a lithium-ion battery more than a better, because the lead-acid battery is more energy density, it is easy to understand, that is, if it is, lithium ion battery and lead acid Battery two batteries, volume size is the same, then the capacity is also different, and the energy density can be accommodated.
But even in this way, you will not feel heavy. Also, the weather is now cold. If the electric car is equipped with lead-acid batteries, there will be such a feeling, that is, if the electric car battery is not as durable, this is because the molecules inside the lead-acid battery will Different changes in the temperature season, the weather is cold, can accommodate small power, and the power storage capacity has decreased, but if it is a lithium ion battery, there will be no such situation, regarding different temperatures adaptability powerful.
However, the lithium-ion battery is relatively high, due to large density, if the safety hazard existed is larger,. The lead-acid battery is relatively cheap, and it is more safe. And more tradition, more early.
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