Terms commonly used in the battery industry

Terms commonly used in the battery industry

Continuous discharge time – the sum of the time that the tycorun battery discharges before the specified termination voltage under a certain external load.

Termination Voltage – The specified minimum discharge voltage or maximum charge voltage when a battery is discharged or charged.

Residual Capacity – The residual capacity of the battery that can be releasable.

Over-discharge—exceeds the specified termination voltage, and continues to discharge when it is lower than the termination voltage. At this time, it is easy to leak liquid or affect the service life of the battery.

Self-discharge – The process in which a battery loses its capacity during storage without being connected to an external load.

Utilization — The percentage of actual discharge capacity to theoretical discharge capacity.

Internal resistance—the resistance between the positive and negative ends of the battery is the sum of the resistances of the current collector, electrode active material, diaphragm, and electrolyte. The smaller the value, the better the performance.

Shelf life – the time that the battery can be placed under certain conditions without load, and the performance has deteriorated to the specified level.

Cycle life – under certain conditions, the rechargeable battery is repeatedly charged and discharged, and the number of times of charge and discharge that can occur when the battery performance such as capacity reaches the specified requirements.

Leakage – The phenomenon of electrolyte flowing out of the battery.

Internal short circuit – the state in which the positive and negative electrodes form an electrical path inside the battery, mainly due to the destruction of the separator, the mixing of conductive impurities, and the formation of dendrites.

Charging – The process of raising the voltage and capacity of a battery using an external power source, where electrical energy is converted into chemical energy.

Discharge characteristics—Characteristics that the battery exhibits when charging, such as charging curve, charging capacity, charging rate, charging depth, charging time, etc.

Charge Curve — The curve of the battery’s voltage over time as it charges.

Overcharge – The process of continuing to charge beyond the specified end-of-charge voltage, at which time the battery’s service life is affected.

Constant Voltage Charging – The process of charging a rechargeable battery at a constant voltage. In general, this constant voltage is the end-of-charge voltage. The termination current is generally set, and the charging process ends when the current is less than this value.

Constant current charging – the process of charging a rechargeable battery under a constant current. Generally, a termination voltage is set, and when the voltage reaches this value, the charging process ends.

Capacity density – the amount of electricity that can be released per unit mass or volume, generally expressed as mA h/L or mA h/kg.

Energy density—the amount of energy that can be released per unit mass or volume, generally expressed in W·h/L or W·h/kg.

Power density – the energy that can be released per unit mass or volume, generally expressed in W/L or W/kg.

Coulombic efficiency – under certain charge and discharge conditions, the percentage of the charge released during discharge and the charge charged during charging, also known as charge and discharge efficiency.

Carbon chemical element, symbol C, atomic number 6, allotropes are diamond, graphite, fullerene and carbon nanotubes, it is the main element that constitutes amorphous carbon materials and graphite. The examples used are: a. All words related to carbon element and carbon atom, all use carbon; b. Carbon-containing compounds, such as hydrocarbons, calcium carbonate, silicon carbide, aromatic carbon, etc.; c. Professional terms, such as Carburizing, carbon content, free carbon, etc.

Carbon is interpreted as a solid material with a C/H atomic ratio greater than 10. It cannot contain graphite, and can only be used raw materials or intermediate products (part of finished products). An example of use is as follows. a. Phrase terms for amorphous carbon materials, such as coke, charcoal, coal, carbon black, activated carbon, carbon rods, etc.; b. Professional terms, carbonization, carbonization; However, for the average person, mixed with in many cases.

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