Lithium battery specifications and technical terms-01

Lithium battery specifications and technical terms-01

We always want to find a battery with the largest capacity, but what is the acceptable price? What size and weight is required? Obviously there will always be trade-offs, so we need to know how the manufacturer details all of these specifications; we'll cover them in more detail in a future article, below we introduce a few related terms and specifications. 

Primary and secondary batteries: 

So-called primary batteries are those that can generate voltage immediately after assembly, immediately applied, but most can not charge,LiSOCL2 battery, LiMNO2 battery CP thin battery; Secondary batteries can be recharged after assembly and first use, and are usually rechargeable, Lipo battery, Lithium-ion battery. 

Smarttype: 

This type of battery contains components or circuits that monitor the battery and communicate with external applications, usually the information provided by the monitoring circuit includes charging status, temperature or environmental information, battery health status, service life, product number/model... And so on; some circuits are responsible for power management or to prevent overcurrent and other security functions. If a battery has more than four interfaces, it's likely to be smart, and we'll talk about that in the future. 

Internal resistance and maximum internal resistance

The internal resistance of a lithium battery is measured in Ohm, the effective DC resistance produced by the parallel operation of the components that generate the voltage in the battery. The maximum internal resistance specification is based on the manufacturer's requirements for safe operation and the worst case internal resistance during charging and discharging. To measure the internal resistance of a DC, a two-stage DC-load method is usually used.

Energy density

The energy-to-capacity (or energy-to-size) ratio in watt-hours per liter (Wh/l) or megajoules per liter (MJ/L-RRB- ; this number basically defines a battery in terms of size, the“Strength” of a battery is also expressed in joules per liter (J/L) by some manufacturers. The mass specific energy of LiSOCL2 battery is as high as 500WH/Kg, and the volume specific energy is as high as 1000WH/L, which is also the highest among all lithium batteries at present. Specific energy density of LiMNO2 battery is up to 260 Wh/kg 

Energy/consumer-price

Measured in watt-hours per dollar (Wh/$US) , this allows different energy sources to compare costs; sometimes the ratio is reversed, for example, dollar/kilojoule ($US/KJ) . 

Specific Power

The power-to-weight (or power-to-mass) ratio in watts per kilogram (w/kg) , as opposed to the energy ratio, which refers to the amount of power a battery can provide, a higher number usually means a lower internal resistance. When the load resistance is equal to the sum of the internal resistance of the battery and the resistance of all the wires and connectors, the maximum power is delivered to the load current; however, because of the high I2R loss, this is not very efficient for total energy transfer.

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