Power Station Battery control circuit
- Autor:pro
- Lassen Sie auf:2022-10-06
Battery pack circuit
M-type sealed battery is widely used in small and medium-sized portable UPS, which is a sealed maintenance free battery. Generally, the rated voltage of each battery is 2V, 4V, 6V or 12V. They are connected in series and parallel to form a battery pack for the UPS. The specification capacity of the battery is expressed in ampere hours, such as 12V, 6Ah/20hR. It indicates that the output voltage of the battery is 12V and the rated capacity is 6Ah. This index refers to the total ampere hours measured when the battery is discharged at the rate of 20 hours, and discharged until the final output voltage of the battery is 10.5V. Battery is an important part of UPS. The performance and quality of batteries directly affect the quality of portable UPS energy storage power supply. Its cost accounts for more than 1/3 of the total machine cost.
PWM inverter and control circuit
In portable UPS, pulse width modulation (PWM) is usually used to convert DC to AC, and the circuit that converts DC to AC is called inverter. The inverter and its control circuit are the core circuit of UPS. For the standby UPS, when the power supply voltage is lower than 170V, the internal AC voltage stabilizing circuit cannot maintain the normal 220V output, and the inverter starts to work, converting the DC power stored in the battery into AC power. The output waveform is usually square wave, and some UPS output waveforms are sine wave. When the mains power supply rises above 180V, the inverter stops working and returns to the main power supply state (the voltage stabilized output is 220V).
For online UPS, the inverter is always in the inverter working state. When mains power is supplied, AC power is continuously rectified into DC power, and then reversed into AC output. When the mains voltage drops below 170V, the inverter converts the DC stored in the battery into AC output. When the mains power rises to 180V, it returns to the main power state.
M-type sealed battery is widely used in small and medium-sized portable UPS, which is a sealed maintenance free battery. Generally, the rated voltage of each battery is 2V, 4V, 6V or 12V. They are connected in series and parallel to form a battery pack for the UPS. The specification capacity of the battery is expressed in ampere hours, such as 12V, 6Ah/20hR. It indicates that the output voltage of the battery is 12V and the rated capacity is 6Ah. This index refers to the total ampere hours measured when the battery is discharged at the rate of 20 hours, and discharged until the final output voltage of the battery is 10.5V. Battery is an important part of UPS. The performance and quality of batteries directly affect the quality of portable UPS energy storage power supply. Its cost accounts for more than 1/3 of the total machine cost.
PWM inverter and control circuit
In portable UPS, pulse width modulation (PWM) is usually used to convert DC to AC, and the circuit that converts DC to AC is called inverter. The inverter and its control circuit are the core circuit of UPS. For the standby UPS, when the power supply voltage is lower than 170V, the internal AC voltage stabilizing circuit cannot maintain the normal 220V output, and the inverter starts to work, converting the DC power stored in the battery into AC power. The output waveform is usually square wave, and some UPS output waveforms are sine wave. When the mains power supply rises above 180V, the inverter stops working and returns to the main power supply state (the voltage stabilized output is 220V).
For online UPS, the inverter is always in the inverter working state. When mains power is supplied, AC power is continuously rectified into DC power, and then reversed into AC output. When the mains voltage drops below 170V, the inverter converts the DC stored in the battery into AC output. When the mains power rises to 180V, it returns to the main power state.
