Battery capacity and type, as follows:
1. Battery Capacity: Battery capacity determines the size of the energy storage. Generally speaking, higher capacity lithium batteries are usually larger than smaller capacity batteries. This is because higher capacity generally requires more chemicals and internal battery components.
2. Battery type: Lithium batteries have different types and chemical compositions, such as lithium-ion batteries, lithium-polymer batteries, etc. Different types of batteries have different characteristics and design requirements, which also affect their size.
In summary, the capacity of lithium polymer batteries is related to the size of the model and depends on the thickness, width and length of the battery. It also depends on the material and size of the battery.
Quelle is the difference between lithium batteries and batteries, and why are their sizes different?
The differences between normal operating current and capacity of lithium batteries are as follows :
Difference 1:
1. The meaning of operating current and capacity:
Operating current is the discharge current in actual use. Capacity is a unit of measurement for the amount of energy stored in a battery. This is the main battery indicator and is usually expressed in mAh. Taking 1AH as an example, 1AH is equal to 1000mAH, which means that the battery discharges with a current of 1A for about 1 hour. In actual use, the larger the current, the actual discharge time will be shortened.
Difference 2:
2. Capacity and charging current:
Capacitance and charging current are not necessarily related, but they always existbear a certain relationship. batteries, if you charge with a low current, it will take much longer to fully charge, so when designing a charger for a large capacity battery, it is usually more powerful than a small capacity battery.
That is to say, the current is greater. We know that the charger can be considered as a constant current source. If you look closely, each charger, i.e. online charging, has a different current.
Third difference:
3. Battery Performance:
One of the important performance indicators of battery performance is battery capacity, which indicates that under certain conditions (discharge rate, temperature, final voltage, etc.) The amount of electricity released by the battery (JS-150D can be used for discharge testing), that is, the capacity of the battery, usually in amp-hours (abbreviated, expressedmated in A· H, 1A·h=3600C)
The formula for calculating the capacity of the battery C is C=∫t0It1dt (integrate the current I from t0 to t1). The battery is divided into positive and negative poles. Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions. Capacity C = discharge current (constant current) I × discharge time (hours) T. Discharge time T = capacity C / discharge current (constant current) I. Discharge current (constant current) I = capacity C / time discharge T.
:Characteristics of lithium-ion batteries:
Lithium-ion batteries have a very useful characteristic for measuring fuel, that is, when of discharge, the battery voltage will gradually decrease as the power drains and there are quite large.The slope of. This gives us another rough way to measure electricity.
The method of taking battery voltage revient to measure the height of the water surface in the water tank to roughly estimate the remaining water volume.
But in fact, the voltage of a lithium battery is much more complicated than measuring the height of still water in the water tank. Using voltage to estimate the remaining capacity of a battery has the following instabilities: For the same battery, with the same remaining capacity, the voltage value changes due to the magnitude of the discharge current. The higher the discharge current, the lower the voltage.Lithium-ion batteries with different types of electrode materials have very different discharge platforms. The discharge platforms of lithium cobalt batteries and lithium manganese batteries are completely different.
The above will cause voltage fluctuations and differences, making the battery capacity display unstable. Whenf you use voltage to measure battery capacity on a mobile phone, it cannot always be in standby with a low current state.
Severe temporary power losses, such as turning on the backlight, playing ringtones, especially passing the battery, will cause the battery voltage to drop quickly.
Lithium polymer batteriesare better than lithium batteries. The difference lies in different raw materials, different safety, different manufacturing processes and different capacities. .
1. Raw materials
This is the main reason why lithium polymer batteries work differently from lithium batteries. Polymer batteries refer to the use of polymer materials in at least one of the three main components of the positive electrode, thenegative electrode or electrolyte.
In addition to the inorganic compounds of lithium batteries, the cathode materials of polymer batteries can also use conductive polymers. Lithium batteries use electrolytes (liquid or colloids)
2. >
Polymer batteries can be thin, in any area and in any shape, because the electrolyte can be solid or colloidal rather than liquid. Lithium batteries use electrolytes and require a solid casing. The housing serves as a secondary packaging to contain the electrolyte.
3. In terms of safety
Polymer batteries are mostly soft batteries, which use aluminum-plastic film as the outer casing when organic electrolytes are used inside, even if the film is aluminum . The liquid is very hot, it will not explode.
4. Cell voltage
Since thePolymer batteries use polymer materials, multi-layer combinations can be made in cells to achieve high voltages, while the rated cell capacity of lithium batteries is 3.6V. If you want to achieve high voltage in real applications , you need to connect several cells in series to form an ideal high voltage working platform.
5. Conductivity
The solid electrolyte of polymer batteries has low ionic conductivity. At present, some additives are mainly added to make it gel electrolyte to improve the conductivity. This only increases the ionic conductivity, unlike the conductivity of lithium batteries which maintains a stable value and is not affected by the quality of auxiliary materials.
6. Capacity
The capacity of polymer batteries has not been effectively improved compared to batteriesstandard capacity lithium battery. Always reduced.
7. Manufacturing process
The thinner the polymer battery, the better it can be produced, and the thicker the lithium battery, the better it can be produced. expand into more application areas.
8. Price
This is the key factor that determines the market capacity of both. At present, the price of polymer batteries on the market is generally higher than that of lithium batteries. , which affects the market capacity of the two, the ratio of the former to the latter is 1:9.
Remarks
Storage requirements: In an environment with a temperature of 20 ± 5 ℃ and humidity not exceeding 50%, corrosion of the aluminum foil by the Air and water vapor should be avoided during transportation.
This product is divided into two types, A and B. The main characteristics of each are: the appearance of type A is black, the coating thicknessconventionally is 4-8μm on both sides and the conductive performance is more remarkable; the appearance of type B is light gray, and the conventional coating thickness is 2-3μm on both sides. Fewer welding layers can be done in the cladding area and the cladding machine can identify skip gaps.
Type B (gray) carbon coated aluminum sheet can be ultrasonic welded directly in the coating area. It is only suitable for soldering laminated battery tabs (up to 2-3 layers of pole pieces), but the power and time of ultrasound require fine tuning.
The heat dissipation of carbon layer is worse than that of aluminum foil, so the belt speed and baking temperature should be adjusted appropriately when coating.
This product can significantly improve the overall performance ofs lithium batteries and capacitors, but it cannot be used as the main factor to change some aspects of battery performance, such as battery energy density, high and low temperature performance, high voltage, etc.
Reference for the above content: Baidu Encyclopedia-Battery Cell
Reference for the above content: Baidu Encyclopedia-Lithium Battery