How is the capacity of the lithium iron phosphate actually calculated?

The energy of a battery: refers to the output of electric energy by a certain discharge condition.

Specific energy: the battery energy per unit weight or unit volume, it is called weight specific energy or volume specific energy.

The weight specific energy and volume specific energy of lithium iron phosphate are:

Batteries of pure electric vehicle: about 110 wh/kg; 210 wh/L

Batteries of hybrid electric vehicle: about 65 wh/kg; 120 wh/L

Battery pack, often referred to as the battery core part, protection plates with batteries usually refers to the battery pack shell part.

Battery pack than energy: with battery than energy is the same as the core

Battery pack than energy: associated with shell and other auxiliary parts weight and volume.

Specific energy refers to the unit weight or volume of energy, the battery energy is involved in the electrode reaction of unit mass of the size of the electrode material release power.

Power battery What _ than energy power battery energy density than how to calculate

Specific energy storage battery refers to the battery unit mass or volume can output power, unit are respectively w. h/kg or w. h/L.

Have theory than energy than the energy and the actual ratio. Theoretical specific energy refers to 1 kg battery reaction material completely discharge theory can output energy. Actual specific energy for 1 kg material can output the actual energy battery reaction.

Commonly used energy than to compare different battery series. Main battery energy than are shown in table 7-12.

Table 7-12 main battery series of specific energy

What is power battery energy than _ power battery energy density than how to calculate

Due to the influence of various factors, then the actual battery energy is far less than the theoretical specific energy. The relation between the actual and theoretical specific energy than energy is as follows:

Richard KvKRKm real = W W

Type of Kv - voltage efficiency (the ratio of the working voltage of battery and electromotive force).

KR - reaction efficiency of utilization of active material (said);

Km - quality efficiency exist in some battery don't attend to flow reaction but it is necessary

Material, should reduce the proportion of these substances, in order to improve the active substances of than

Cases: Efficiency is the ratio of the two quality.

Specific energy accumulator is a comprehensive index, which reflects the quality of the battery level, also shows that the manufacturer's technical and management level. In general, the manufacturer is not independent assessment of the indicators, but the level of the battery in the assessment production, often to measure criterion.

Power battery energy density than how to calculate

All think that to calculate the battery energy density of the battery, first of all to understand the common the lithium battery Conventional types of lithium batteries are divided into two kinds.

1 kind of lithium battery: in domestic new energy battery (ATL), state batteries, kay beauty, represented bick, sanhe chaoyang, etc.

This kind of material is commonly used in the lithium battery three yuan, also known as cobalt acid lithium, it in large capacity, the advantages of high energy density, wandered in various batteries factory, now The ternary battery Energy density in 580 wh/l, the working voltage of cobalt acid lithium is typically 2.75 V ~ 4.2 V, like the domestic new energy enterprises ATL doing now 4.35 V battery voltage system, the energy density can be as high as 650 wh/l.

These batteries are generally used in smartphones, tablets, laptops, Bluetooth headset is common.

This kind of material is commonly used in the lithium battery three yuan, also known as cobalt acid lithium, it's on the large capacity, the advantages of high energy density, wandered in various batteries factory, now three yuan energy density of batteries in 580 wh/l, the working voltage of cobalt acid lithium is generally 2.75 V ~ 4.2 V, like domestic new energy enterprises ATL doing now 4.35 V battery voltage system, the energy density can be as high as 650 wh/l.

These batteries are generally used in smartphones, tablets, laptops, Bluetooth headset is common.

A tangle is there are many domestic manufacturers with ternary material will do more than 5 c discharge batteries, for example, amd, day, foster, the electric power supply enterprises such as battery, the battery can be used on the unicycle, thinking cars, electric motorcycle, its performance can meet the product requirements of customers, and accepted by the masses of users.

2 kinds of lithium iron phosphate batteries: in the domestic byd, Walter, catic represented by the battery power battery companies such as lithium electricity.

The battery materials for lithium iron phosphate, referred to as "iron battery, main is famous for its safety and long cycle life, the working voltage of battery is generally between 2.3 v ~ 3.65 v, cycle life as high as more than 2000 times, do better power battery enterprise, can work the battery voltage to extend the range of 2.0 v to 3.65 v.

This power batteries, is often used in electric buses, electric cars, electric forklifts, mobile machine site.

Battery energy density calculation method is as follows:

The energy density (Wh/l) = capacity & Times; Voltage present volume 1000 (conversion) platform

Iron platform voltage: 3.2 V. The ternary lithium electric platform voltage is 3.7 V.

Cylindrical volume = PI r2 & Times’;

A rectangular volume = long & Times; Wide & Times; High;

Power battery material

For battery, to meet with high power, high energy, energy power balance. Care the main battery core of key raw materials, it is the positive and negative, diaphragm, electrolyte, etc., and the service life of the battery in the car after the termination of the cascade utilization and recycling of content.

The anode material: inside or with ternary material is given priority to, especially is given priority to with high nickel ternary material.

Anode materials: now application more or graphite materials, like artificial graphite, natural graphite, and so on.

Diaphragm: some time from now to the future, it is mainly used by polyolefin material. Whatever it is polypropylene or polyethylene, it applies in power battery. Probably a development trend is, aiming at the high energy density of such a development trend and requirements, polyolefin diaphragm is a hot spot of research and development and industrialization.

Lithium phosphate electrolyte: at present, it focuses on Lithium Hexafluorophosphate. Now some new electrolyte, like lithium FSI, lithium TFSI, it is applied as additives mostly.

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