What is the power lithium battery? What are the differences between power lithium batteries and capacity lithium batteries?

Power lithium-ion batteries need more consideration for reliability and consistency. After all, it takes a long time (at least 5~10 years), harsh environment (low temperature in winter, summer exposure, rain and snow), and a large number of batteries are connected in series. Considering reliability and consistency, assuming that a car uses 1000 power batteries, ideally, car manufacturers hope that there will be no problem under the scale of a car of 100,000 cars, which is ideally required to have problems with the power battery (safety, storage, The probability of cycling, etc.) is less than one in a billion. Of course, for the highest-end consumer batteries, Apple also requires suppliers to this level. Considering reliability, power batteries are generally designed to be more redundant, using thicker diaphragms, foils and casings, so the energy density is about half that of consumer batteries.

Consumer lithium ion battery don't need long time reliability (circulation also need not do so well, because it would be in a year or two anyway), generally do not need to match group used alone, so no too big to consistency requirements, but because of consumer's mobile phone, pad space is limited and very precious, so consumer lithium ion battery for strict size, capacity and energy density is very demanding.

For safety, more external power battery protection circuit, heat dissipation layout and so on, of course also faces more harsh conditions (higher external voltage, the bigger current, more complex external environment), consumer battery less protection, want to be in a higher energy density by battery materials and design on the basis of resistance to live of the security risks.

Personally, I think the high-end consumer battery USES the most advanced technologies and materials, and power battery is the need for more advanced process control and consistency control and quality management.

1. Capacity is not the same, the power of large mobile phones and other electronic products capacity is small,

2. The cycle life of power will be high

3. The temperature control point for the power will be a protection of the temperature of the battery pack.

Are many types of lithium batteries, like power type lithium battery type and capacity lithium battery, so what is the difference between this two kinds of lithium battery? Probably a lot of people are not very clear, below small make up to explain for everybody.

1, the voltage in different sizes

In the battery industry, the increase of voltage, the corresponding output voltage also increases, so as to make the dynamic type Lithium battery pack can meet some of the high power devices; And parallel way to directly affect the result, make the whole battery current increases, the capacity is affected by the output current, so the parallel direct action is making lithium battery capacity increases, the connection of the capacity of the battery pack in this way tend to be larger, known as the capacity of the lithium-ion battery pack.

2, the application of different products

Some large equipment need voltage value is higher, because of the low power battery doesn't work, so be about to choose type power lithium-ion battery pack. We usually used in the electric bicycle, for example, it is required by the voltage value tend to be 48 v, relative to some things in our life, 48 v is not small. So we must use power type lithium battery pack to ensure electric bicycle. And we usually go to a few large supermarkets or shopping malls, some marker light and standby power, because of these devices and power consumption is not very big, so commonly used type capacity lithium battery pack, between the two is different on the application of the product.

3, internal resistance of different

Power type lithium battery internal resistance to specific storage type of lithium battery is small, in 18650, for example, 3 discharge of good manufacturer with PDC commonly, internal resistance around 40;5 discharge generally don't take the PDC resistance around 20.

Lithium-ion batteries are new energy vehicles power lithium battery, according to the characteristics into power, energy and power energy balance type 3 kinds. Power type that you talk about power lithium battery main characteristic is to support large ratio of charge and discharge, typically up to 10 c above, the parameters of the main consideration is than function (W/kg).Type of energy is the key features of specific energy (WH/kg).Analogy is capacity model is a marathon runner, must have the stamina, capacity is bigger, the large current discharge performance is generally not high; Power type is sprinter, spelling is the force of the outbreak, but endurance also should have, or ran near capacity is too small.

Type of lithium battery and power energy is accompanied by the emergence of plug-in hybrid and appear. Stored energy is higher, it requires that the battery can support a range of pure electric drive, also want to have good power characteristics, when low battery into a hybrid model.

Power type lithium batteries that power lithium batteries, the main feature is to support the large ratio of charge and discharge, will be up to 10 c above, the parameters of the main consideration is than function (W/kg).

Capacity model is the key features of specific energy (Wh/kg).

For example:

If the capacity type is similar to a marathon player, it must have high endurance, that is, it requires high capacity, and it does not require high current discharge performance. Then the power type is a sprinter, and it is a bursting force, but there is also endurance, otherwise the capacity is too small to run far away. Power-energy lithium batteries have emerged with the advent of plug-in hybrid vehicles. It requires the battery to store higher energy, can support pure electric driving for a distance, and also has better power characteristics, and enters the hybrid mode when the battery is low.

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