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The charging and discharging process of capacitors
Release time:
2023-04-10
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(1) The process of charging. The process of charging a capacitor (storing charge and energy) is called charging. Connect one electrode plate of the capacitor to the positive pole of the power supply, and the other electrode plate to the negative pole of the power supply, and each electrode plate carries an equal amount of different charges. After charging, there is an electric field between the two plates of the capacitor, and the charging process stores the electrical energy obtained from the power source in the capacitor.
(1) The process of charging.
The process of charging a capacitor (storing charge and energy) is called charging. Connect one electrode plate of the capacitor to the positive pole of the power supply, and the other electrode plate to the negative pole of the power supply, and each electrode plate carries an equal amount of different charges. After charging, there is an electric field between the two plates of the capacitor, and the charging process stores the electrical energy obtained from the power source in the capacitor.
(2) The process of discharging.
The process of causing a charged capacitor to lose its charge (releasing charge and energy) is called discharge. For example, if a wire is used to connect the two poles of a capacitor, the charges on the two poles will neutralize each other, and the capacitor will release charges and electrical energy. After discharge, the electric field between the two plates of the capacitor disappears and electrical energy is converted into other forms of energy.
The battery self-discharge refers to the ability of the battery to retain the stored charge in the open circuit state. The self-discharge types of lithium ion batteries can be divided into physical self-discharge and chemical self-discharge. The battery monomer forms the module by series connection and parallel connection. If the consistency of the self-discharge of the monomer in the module is poor, it will lead to the inconsistency of the terminal voltage of the internal monomer after the module has been stored for a period of time, resulting in the phenomenon that some monomer has reached the target voltage during the charging and discharging process of the module, while the other monomer is still at a higher or lower voltage, leading to the overcharge or overdischarge of the monomer, or even problems, This is also a challenge to the module's voltage balancing ability. Self-discharge is an important performance index of lithium ion capacitors.
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