21700 battery.Basic parameters of power battery

　　Basic parameters of power battery

　　Power battery is an important part of electric vehicle, it stores and releases electrical energy for electric vehicle

　　Provide driving force. The basic parameters of the power battery are described in detail below.

　　1. Capacity

　　Capacity refers to the ability of a power battery to store electrical energy, usually in ampere-hours (Ah). Volumetric overload

　　The more energy the battery stores, the farther the electric vehicle can travel. Power battery capacity

　　It is related to electric vehicle models and use needs. Generally speaking, the capacity of electric vehicles is between 10 and 100Ah.

　　2. Voltage

　　Voltage refers to the potential difference between the positive and negative terminals of a power battery, usually in volts (V). voltage

　　Determines the size of electric energy, but also directly affects the performance of electric vehicles. Power batteries common to electricity

　　The voltage is 12V, 48V, 72V and 96V.

　　3. Rechargeability

　　The power battery can be recharged and discharged repeatedly, which is called rechargeability. Good power batteries should have

　　High rechargeable performance, able to charge and discharge multiple times without affecting battery life. Rechargeability can be passed

　　cycle life (cycle life) is measured, that is, how many times the battery can be charged and discharged.

　　4. Self-discharge Rate

　　Self-discharge rate refers to the power battery in the static state, the power loss per unit time

　　Rate. A good power battery should have a low self-discharge rate, so that the battery is not used for a long time

　　Can maintain high electrical energy.

　　5. Energy Density

　　Energy density is the amount of electrical energy stored per unit volume or weight. Power battery energy

　　The higher the density, the more electrical energy is stored, and the longer the range of the electric vehicle will be. Currently, lithium ions

　　Batteries have a big advantage in terms of energy density.

　　6. Power Density

　　Power density refers to the rate at which a power battery can release electricity per unit volume or per unit weight.

　　The higher the power density, the stronger the output capacity of the battery, and the better the acceleration performance of the electric vehicle. And energy

　　The difference in density is that power density pays more attention to the transient performance of the battery.

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