In lithium batteries, VF generally represents "the open circuit voltage between the positive and negative electrodes of the battery." VF is one of the basic battery parameters and is generally used to indicate the battery potential difference and battery condition. The VF value can be used to determine the power, health and efficiency of the battery during charging and discharging. For example, when charging a lithium battery, the VF value will increase with the degree of battery charge. When VF reaches a certain value, it means the battery is fully charged. When the lithium battery discharges, the VF value decreases with the degree of battery discharge. When VF drops to a certain value, it means the battery needs to be charged.
What is the concept of the number of C in lithium batteries?
There are different types of batterieses, and the minimum voltage is also different, but it should not be lower. than 30V.
36V lithium battery, if it is a lithium iron battery, 11 cells are used. Single cell parameters are:
Rated voltage: 3.2V
Charge cutoff voltage: 3.65±0.05V
Discharge cut-off voltage: 2.5±0.05 V
Then for a 11-cell 36 V battery in series, the minimum protection voltage is 11x2.5 = 27.5 V, and the maximum voltage at full charge is 11 >Standard voltage 3.6-3.7 V?
The voltage after full charge reaches 4.2 V?
The voltage after discharge is 2.75 V
Then 10 cells. For a 36V battery pack connected in series, the minimum protection voltage is 27.5V, the maximum full charge cutoff voltage is 42V, and the operating voltage is 36V. Voltage (voltage), also called potential difference or potential difference, is a measure of the strength of a unit charge in an electrostatic field. The physical quantity of the energy difference caused by the electric potential difference. Its magnitude is equal to the work done by a unit positive charge moving from point A to point B due to the strength of the electric field. The direction of voltage is defined as the direction from high potential to low potential. The international unit of voltage is the volt (V, called volt). Commonly used units include millivolt (mV), microvolt (μV), kilovolt (kV), etc. This concept is similar to “water pressure” caused by high and low water levels. It should be clarified that the term "voltage" is generally only used in circuits, while "potential difference" and "potential difference" are generally used in all electrical phenomena.
C: used to express the ratio between the current ofbattery charge and discharge, i.e. rate. Charging and discharging rate = charging and discharging current/rated capacity. For example, for a 1200 mAh battery, 0.2 C represents 240 mA (rate of 0.2 for 1200 mAh) and 1 C represents 1200 mA (rate of 1 for 1200 mAh).
1. Lithium metal battery:
Lithium metal battery generally uses manganese dioxide as the positive electrode material, lithium metal or its metal alloy as the negative electrode material, and uses non-metal . aqueous electrolyte solution.
2. Basic Principles of Lithium Batteries
Discharge Reaction: Li+MnO2=LiMnO2
3. Lithium-ion batteries:
Lithium-ion batteries generally use lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and use non-aqueous electrolytes .
Total reaction of the rechargeable battery : LiCoO2+6C = Li(1-x)CoO2+LixC6
Detailed information
Hour rate
Hourly rate: it is the discharge rate expressed in terms of discharge time, that is, the time it takes for a certain current to be discharged to the specified final voltage, e.g. when the rated capacity . of a battery is 20 hours, it is 12AH, that is, C20=12AH means that the battery should be discharged with a current of 12/20=0.6A, and the battery which reaches 20H continuously is qualified.
Rate
Rate: refers to the multiple of the battery discharge current value compared to the nominal value. For example, the discharge current is expressed as 0.1C20?, for a 12AH (C.?20?) battery, that is, discharging with a current of (12/20)*0.1 = 0.06A, 3C?20? refers to a discharge current of 1.8 and the subscript of C indicates the discharge time rate.
Baidu Encyclopedia-Rate C of releasebattery life
Baidu Encyclopedia-Lithium Battery