The difference between a rechargeable lithium-ion battery and a lithium polymer battery

The difference between a rechargeable lithium-ion battery and a lithium polymer battery:

1. Lithium battery and lithium ion battery (polymer is also a lithium ion battery). Lithium battery is a kind of lithium metal or lithium alloy as a negative electrode material. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal the environment is very demanding.

2. The negative electrode of the lithium ion battery is an intercalation structure material such as graphite. In the battery, lithium ions move in the positive and negative electrodes, so it is much safer than the lithium battery.

3. The lithium ion battery and lithium Polymer battery, lithium ion battery is a liquid electrolyte, polymer battery electrolyte is a gel or solid, more safety.

4. Lithium polymer battery box of slightly different in packaging for lithium-ion batteries, lithium batteries are typically steel shell (18650 2320) or button, and lithium polymer battery with aluminum-plastic packaging film as packing, namely soft package battery。

The lithium battery

1. A higher energy weight ratio and volume ratio;

2. High voltage, single section lithium battery voltage of 3.6 V, is equal to three nickel cadmium or nickel metal hydride rechargeable batteries in series voltage;

3. Self-discharge can be stored for a long time, which is the most outstanding superiority of the battery;

4. No memory effect. Lithium battery does not exist nickel cadmium battery memory effect, so the lithium battery without before discharge,

5. Long service life. Under normal working conditions, the number of charge/discharge cycles of the lithium battery is much greater than 500 times;

6. Can quick charge. Lithium battery can usually use 0.5 ~ 1 times the capacity of charging current, charging time to 1 ~ 2 hours;

7. Parallel use;

8. Due to the battery does not contain heavy metals such as cadmium, lead, mercury, on the environment pollution-free, is contemporary the most advanced green battery;

Lithium ion batteries

1. High voltage, the working voltage of monomer battery is as high as 3.6 to 3.9 V, Ni - CD, Ni - H battery 3 times.

2. The specific energy is larger than the current energy. The actual specific energy can reach 100-125Wh/kg and 240-300Wh/L (2 times Ni-CD, 1.5 times Ni-MH). In the future, with the development of technology, the specific energy can be Up to 150Wh/kg and 400Wh/L.

3. Long cycle life, generally all can reach more than 500 times, even more than 1000 times. For a small electric current electric discharge, will double the competitiveness of the electric battery life.

4. Good safety performance, pollution-free, no memory effect. As Li - ion predecessor of lithium batteries, dendrite short circuit formed by the metal lithium is easy, reduced its areas of application: Li - ion in do not contain cadmium, lead, mercury and other elements of environmental pollution: some process (such as sintering type) of the one big drawback of Ni - CD battery exist for "memory effect", it severely battery, but Li - ion doesn't exist problems in this field.

5. Self-discharge is little. The self-discharge rate of Li-ion fully charged at room temperature after storage for 1 month is about 10%, which is much lower than 25-30% of Ni-CD, 30-35% of Ni and MH.

6. It can be charged and discharged quickly. The 1C charging capacity can reach more than 80% of the nominal capacity.

7. The working temperature range is high, and the working temperature is -25~45°C. With the improvement of electrolyte and positive electrode, it is expected to be widened to -40~70 °C.

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