It is difficult to say with certainty which is better, the polymer battery or the lithium battery. They each have their own advantages. Polymer batteries are more suitable for small applications, while lithium batteries are more promising for large applications. environmental protection and safety More in line with the trend.
1. Difference in shape
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 electrolyte and require. a solid casing as secondary packaging to contain the electrolyte. Therefore, it also adds weight to the lithium battery.
2. In terms of safety
Most current polymer batteries are soft batteries, which use aluminum-plastic film as the outer casing whene organic electrolytes are used inside. They will not explode even if the liquid is very hot, because the aluminum-plastic film polymer battery adopts solid or colloidal state without leaking and only breaks naturally. But nothing is absolute. If the instantaneous current is large enough and a short circuit occurs, it is not impossible for the battery to ignite or spontaneously burst. This is the reason why most security accidents happen on cell phones and tablets.
3. Cell Voltage
Since polymer 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, 6 V. If you want to achieve high voltage in real applications, you need to connect several cells in series to form aideal high voltage work platform.
The new generation of lithium-ion polymer batteries can be thinned in shape (ATL batteries can be as thin as 0.5 mm, which is equivalent to the thickness of a card), in n any area and in any form. , greatly improves the flexibility of battery shape design, so that batteries of any shape and capacity can be manufactured to meet product needs, providing application equipment developers with a high degree of design flexibility and adaptability in power solutions to maximize and optimize the performance of its products.
At the same time, the unit energy of lithium-ion polymer batteries is 50% higher than that of ordinary lithium-ion batteries. Its capacity, charging and discharging characteristics, safety, operating temperature range and lifespane. (more than 500 times) and environmental protection. Performance and other aspects have been greatly improved compared to lithium-ion batteries.
There is a lithium battery in soft packaging without marking on its appearance. How do I determine what type of lithium battery it is?
The difference between lithium ion batteries and lithium polymer batteries:
1. Different raw materials
The raw material of lithium-ion batteries is. electrolyte (liquid or colloidal); The raw materials of lithium polymer batteries are electrolytes, including polymer electrolytes (solid or colloidal) and organic electrolytes.
2. Safety Differences
Lithium-ion batteries are subject to explosion in high temperature and high pressure environments; Lithium polymer batteries use aluminum-plastic films as the outer shell. elementsOrganic ctrolytes are used internally. Even if the liquid is very hot, it will not explode.
3. Different shapes
Polymer batteries can be thin, in any area and in any shape, the reason is that the electrolyte can be solid or colloidal rather than liquid.The battery uses of the electrolyte and requires a solid shell as a secondary packaging to contain the electrolyte.
4. Different Cell Voltages
Since polymer batteries use polymer materials, multilayer combinations can be made in the cells to achieve high voltages, while lithium battery cells have a nominal capacity. is 3.6V. If you want to achieve high voltage in actual use, you need to connect several cells in series to form an ideal high voltage working platform.
5. Different manufacturing processes
PThe thinner the polymer battery, the better it can be produced, and the thicker the lithium battery, the better it can be produced. to expand into more areas of application.
6. Capacity
The capacity of polymer batteries has not been improved effectively and has been reduced compared to standard capacity lithium batteries.
What is the difference between a lithium polymer battery and a lithium iron phosphate battery? Which one is better?
Current lithium-ion battery technology can be roughly divided into two types according to the outer packaging: metal shells and flexible composite film packaging, which are the two types mentioned by the original poster. - Metal hulls are divided into aluminum hulls and steel hulls. The first image on the poster is of a steel hull. The electrolytes inside are all liquid. Flexible packagingin composite film can be divided into two types: lithium-ion polymer batteries and liquid batteries. lithium-ion batteries according to the materials of the positive and negative electrodes and the electrolytes inside. Above, one of the forms of metal shell and soft pack is called liquid lithium ion battery. The other form of soft pack is called polymer. Lithium-ion battery. The difference here is, the difference between liquid lithium ion battery and polymer lithium ion battery is that the negative electrode material and the electrolyte are made of different materials. Talk about the difference. The disadvantage of the soft shell is that it will expand once it swells a little, both liquid and polymer, but the metal shell is not easy to polymerize. The safety performance of lithium batteries is slightly better than that of lithium batteries. liquids. But that doesn't mean that sheIt won't explode. From the perspective of energy density, the shell of the soft shell is much thinner than that of the metal shell, especially when it is large, so it is made into a battery. packaging, the capacity of the soft shell will be larger for the same volume. The same thing is that they all belong to the chemical battery system of lithium-ion batteries.
< p>Lithium Iron Phosphate The battery is good.
1. Different Voltages:The rated voltage is 3.2V for lithium iron phosphate batteries and 3.7V for lithium polymer batteries.
2. Different Capacity: The capacity of lithium polymer battery is much larger with the same volume; for example, the 18650 lithium polymer battery has a capacity of 2200 mAh, while the lithium polymer battery has a capacity of 2200 mAh. the iron phosphate battery has acapacity of 1100 mAh, and the lithium iron phosphate battery can recover after being discharged to a voltage of 0V, although the over-discharge protection voltage is generally 2V while the over-discharge protection voltage excess of lithium polymer batteries is 2.7; V, if it is lower, it will break.
3. Different discharge current: Power lithium polymer battery has a maximum rate of 5 times. Discharge current, lithium iron phosphate battery can discharge current 10 times; the charge is the same, so the lithium iron phosphate battery can charge faster.