Ten differences between polymer lithium battery and battery

Ten differences between polymer lithium battery and battery

1. Polymer lithium battery with different concepts and properties: it is a kind of battery with lithium metal or lithium alloy as negative data and using non-aqueous electrolyte solution. It mainly depends on lithium ions moving between positive and negative to work. In the process of charge and discharge, Li is embedded and de embedded back and forth between the two electrodes; During charging, Li is de intercalated from positive to negative through electrolyte, and the negative is in lithium rich state; The opposite is true when discharging.

Because the chemical characteristics of polymer lithium battery are very active, the processing, preservation and utilization of lithium metal have high requirements for the environment. Battery: also known as secondary battery. It is a device that directly converts chemical energy into electrical energy. It is a battery designed according to rechargeable and rechargeable through reversible chemical reaction. It usually refers to lead-acid battery. After discharge, the internal active substance may be regenerated by charging - storing electric energy as chemical energy; When it is necessary to discharge, the chemical energy is converted into electrical energy again. Storage battery is a kind of electrochemical equipment that stores chemical energy and releases electric energy when necessary.

2. The safety function of polymer lithium battery is different: polymer lithium battery comes from the firmness and firm safety design of positive data. Iron phosphate polymer lithium battery has passed strict safety test and will not be produced even in fierce collision. Lithium iron phosphate has high thermal firmness and low oxidation ability of electrohydrolytic solution, so it has high safety. Battery: lead-acid battery will be produced under strong collision, threatening the life insurance of consumers.

3. Different prices polymer lithium battery: the price of polymer lithium battery is high. Polymer lithium battery is about three times more expensive than lead-acid battery. Combined with the analysis of service life, the same cost is still that the service cycle of polymer lithium battery is longer. Battery: the price of a battery is roughly from hundreds to thousands of yuan. The price of each manufacturer is similar.

4. The information of different polymer lithium batteries with green environmental protection properties has no toxic and harmful substances. It is considered as a green environmental protection battery in the world. The battery is free from contamination in production and utilization, which conforms to the RoHS designation in Europe and is a green environmental protection battery. There is a lot of lead in lead-acid batteries. If it is not handled properly after being abandoned, it will pollute the environment.

5. In terms of cycle life, the service life of polymer lithium battery is longer and that of battery is shorter. The cycle times of polymer lithium batteries are about 2000-3000. The number of battery cycles is about 300-500.

6. Component energy density the energy density of polymer lithium battery is 200 ~ 260wh / g, and the polymer lithium battery is 3 ~ 5 times that of lead-acid, which means that under the condition of the same capacity, the lead-acid battery is 3 ~ 5 times that of polymer lithium battery, so the polymer lithium battery has the upper hand in the lightweight of energy storage device. Lead acid batteries are individually 50 ~ 70wh / g, with low energy density and too bulky.

7. The volume capacity density of volume energy polymer lithium battery is usually about 1.5 times that of battery, so the volume of polymer lithium battery is about 30% smaller than that of lead-acid battery under the condition of the same capacity.

8. The operating temperature of polymer lithium battery is - 20-60 ℃, and the thermal peak value of iron phosphate polymer lithium battery can reach 350 ~ 500 ℃. The capacity may still be released under high temperature. The abnormal working temperature of the battery is - 5-45 degrees. When the temperature drops by 1 degree, the capacity of the battery will drop by about 0.8%.

9. In terms of charge and discharge, different polymer lithium batteries have no memory effect. The battery may be charged and discharged at any time. The self discharge of the battery is low, and the battery can be stored for a long time; The energy is strong and can be charged and discharged quickly. It can fill more than 80% in 20 minutes and discharge the power in 15 minutes. The storage battery has memory effect and cannot be charged or discharged at any time; There is a major self discharge phenomenon, and the battery can be easily scrapped after being put aside for a period of time; The discharge rate is small and cannot discharge with high current for a long time.

10. Different internal data, the positive and negative of polymer lithium battery are lithium cobalt oxide / lithium iron phosphate / lithium manganate, graphite and organic electrolyte. The positive and negative of lead-acid battery are lead oxide, metal lead and electrolyte.