The power supply is faulty. If the battery of the charger is too low or the machine fails, you can connect the charger to the power supply and charge it again. Poor contact. If the charging device is in poor contact with the charging base or the interface is dirty, use a soft cloth to clean the metal contact points on the charger and charging device. The power supply does not match. If the charger and the power supply do not match, it will lead to insufficient power and cannot be charged normally.
Cause of battery heat: mobile phoneThe power consumption in standby is very small, that is to say, the equivalent load resistance of its battery is large, so the discharge current is very small, so the battery will not heat up, and the internal consumption of battery power is very small. The power consumption of the mobile phone is very large when it is waiting for a call or using MP3, that is to say, the equivalent load resistance of its battery is small, and it is a large current discharge when working.
Because the main structure of the wireless charger is a coil, the main structure of the device that your mobile phone receives wireless charging is also a coil, the coil overcurrent, heat is very normal, the general temperature rise is not too high.
Does not work and heat, should be more short circuit, such asIf it is local heat, it is likely that the external circuit is locally short circuit, it is recommended to open and check. Exclude the local short circuit of the external circuit and heat, then your charging treasure can be thrown away, and the internal short circuit charging treasure becomes an indefinite time bomb. Mobile phone charging treasure, also known as mobile phone power supply, mobile power supply.
Volt battery car charger current limiting resistance does not exceed 10 ohms. Disclosure based on queryThe information is generally called this resistance for fuse resistance, low-grade products use ordinary 4-ring resistance, so the 72-volt battery car charger current limiting resistance does not exceed 10 ohms.
Ohm. The charger is the use of high-frequency power technology, the use of advanced intelligent dynamic adjustment charging technology. The resistance of the 72 volt 32 amp charger is 20 ohms. "A varistor is a resistance device with nonlinear voltammetry characteristics, which is mainly used for voltage clamping when the circuit is subjected to overvoltage, absorbing excess current to protect the sensitive device.
The output power is P=UI=72*20=1440W, which is chargedThe maximum allowable output power of an electrical appliance. Since the current is not always maintained at 20A when charging (the current is high at the beginning of charging, and then gradually decreases), the average output power is less than 1440W.
The same, is mainly the size of the overcurrent, causing heat, thereby changing the resistance value.
1, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc.Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone.
2, what are the components of wireless charging? The left side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, power full bridge, and LC composed of inductors and capacitorsThe resonant Tank, in which the inductor is the transmitting end coil. 3, according to Wuhan Construction Bureau officials said, in Wuhan Jianghan Road installed a total of 60 such wireless charging street lights, each street light has two wireless charging location, but also high-power wireless charging, many experienced citizens said it is not bad, very useful, charging on the roadside is also very convenient, of course, be careful of mobile phones stolen.
4, simply put, the mobile phone can be charged through the wireless charger, and then through the wireless reverse charging, the mobile phone as a power source, to another device that can support wireless charging technologyWireless charging, but the disadvantage is that the charging power is relatively small. Wireless charging technology originated from radio energy transmission technology, which is divided into high-power wireless charging and low-power wireless charging.
1, the NTC temperature sensor is composed of an NTC thermistor, a probe, an electronic extension line and a connector, and its core is to use the thermistor's sensitive response to temperature changes. When the temperature rises, the resistance value drops sharply, and vice versa, this nonlinearityIts characteristics make it an ideal temperature measuring tool. By measuring the change in resistance value of the NTC thermistor, we can accurately interpret the temperature information.
2, the NTC in the charger generally increases with the power of the power supply, the size of the NTC thermistor will also increase correspondingly. The NTC thermistor is connected in series in the input of the power supply, and the cold resistance is large, which is used to limit the impulse current of the charger connecting to the power supply and reduce the spark generated during plugging. With the normal output of the charger, the NTC resistor heats itself to reduce the resistance, reduce the voltage drop on the NTC resistor, and reduce the power loss in series in the circuit