The force in the coil (steam used in coal-fired thermal power generation drives the coil, hydraulic pressure relies on water to drive it, etc.) acts as a magnetic induction line to move in the cutting motion, thereby generating an electric current.
But in real life, in order to be able to transfer a large amount of electrical energy, the permanent magnet is often rotated and the magnetic induction wire of the stationary coil is set in motion.
How to measure battery power?
The function of the battery is to provide sufficient and stable electrical energy for the normal operation of the vehicle, and to supplement it by absorbing and storing the electrical energy generated by the generator if the electricity produced speak. The generator is compared to water, so the battery is a water tank. The water tank not only serves to store water, but stabilizesalso the water flow.
The battery consumes more energy when starting the vehicle, because all electrical equipment in the vehicle must be powered by the battery and the generator speed has not yet reached the electricity production speed . time This can indicate whether the battery itself is sufficient.
Of course, in addition to measuring the starting voltage of the battery, it is also necessary to measure its charging voltage, which is generally above 13V. This is an indicator to detect whether the battery can store energy. Normally. Some batteries have problems. Because they cannot store new energy, when a battery is depleted, it is considered completely damaged.
The voltage of a lead acid battery when fully charged is approximately 132 V. As the battery capacity decreases, the battery voltage also decreases.t. When the battery is normal, the remaining capacity can be initially estimated accordingly. the remaining battery voltage. Therefore, when the battery voltage is higher than 132V, it can be considered 100% full. When the battery voltage is higher than 129V, the remaining power can be considered to be 85%.
When the battery voltage is higher than 125V, the remaining power can be said to be 70%. When the battery voltage is higher than 12V, the remaining power can be said to be 50%. 115 V, the remaining power can be considered about 25%, but this is only a preliminary estimate. The remaining specific power is related to the battery condition and is for reference only.
The discharge capacity of the battery decreases sharply as the discharge current increases. If the battery capacity is100% at 10h discharge rate, battery capacity drops to 75% at 3h discharge rate. Uses Batteries use different discharge rates (discharge currents)
When the overall battery voltage drops to 21 V and the electrolyte density drops to 118 g/cm3, the discharge should be stopped to prevent the battery from being damaged due to deep discharge. Use a multimeter. The DC voltage range measures the no-load voltage of the battery. For a 36V battery, its no-load voltage is between 36V and 41V if it is a 48V battery;
Its no-load voltage should be between 36V and 41V, and between 42V and 55V. For a good battery, when the voltage we measure is 126V, we measure it after consumed some energy. If it still shows 126V, that means the battery has better discharge and recovery capabilities.
If it continues to discharge and does not reachnt 126 V, this means the battery needs to be charged. Use a universal charger. By measuring with a meter, we can only approximately assess whether the device can still be used and whether the battery is damaged. We cannot accurately gauge battery power with a multimeter. Of course, the most accurate method is to directly measure the battery discharge capacity.
For example, the rated capacity is 50 Ah and the test discharge capacity is only 20 Ah, which means the remaining power is only 40%. However, this requires professional charging and discharging equipment, which is generally constant current discharge (such as 05C rate, that is, a nominal 50Ah battery is discharged with a constant current of 25 A) until the set cut-off voltage is stopped.
The loading and unloading equipment will record the quantity ofdischarge during this process. This method is the most accurate, but the operation is cumbersome and requires higher requirements. Additionally, under normal circumstances, if the car battery is damaged. The voltage is lower than 9V, it will be more difficult to start the ignition, but don't worry too much
As long as you drive normally for an hour or two, normal power can be restored. start the engine, you must start the alternator to start. Please note the above test method. The battery power obtained is only a reference value. The specific battery life is also affected by many factors such as usage environment, charging conditions. , and the quality of the battery itself.