Hello, the range extender should be more efficient
The voltage generated by the generator is 220 V. If you are charging an electric vehicle, you must use a electric vehicle charger. The charger steps down 220 V to a voltage suitable for charging the battery. For example, if the battery of an electric vehicle is 48 V, the output voltage of the charger should be 54-56 V. There is an efficiency problem between reducing the voltage from 220 volts to 54-56 volts. Generally, the efficiency of a switching power supply charger is around 80%, which means that the final utilization rate of a 3000 watt generator is around 2400 watts (the theoretical value is actually less than this), of which 600 watts of power are lost during the conversion process! And because the output current of a home electric vehicle charger is relatively small, it takes more than four hours or mores, for a full charge. That is, the energy supplied by the motor during charging is still wasted (the electricity generated by the generator is stored there and the charger cannot use as much. This is equivalent to the generator being a one-inch water pipe that is constantly dripping water, and the charger is equivalent to A quarter-point faucet is installed on the one-inch water pipe of the generator When fully open, it. can only use a quarter of the water)
But the range extender is different and charges the same (48V battery), the range extender only needs to output 54 to 56 voltage. It automatically adjusts the speed according to the voltage of the battery (so it is more efficient) and the charging current is also higher than that of a home charger. Charging is also faster. However, it is not recommended to use the range extender instead.e from a home charger for a long time. Because the charging current is higher than that used at home. This will damage the battery for a long time. (Different types of range extenders have different functions) For example, when a 3,000 watt range extender is at full power, 3,000 divided by 54 volts is approximately 55 amps. Therefore, you should pay attention to this issue when choosing to use a repeater. However, with a rated power of 3000 watts, it is impossible to produce 3000 watts continuously under full load, and the safe power for a long time is only about 1500-2000 watts. But the current reached around 20 amps! Compared to batteries with a capacity of more than 150 amps, this is possible and will not be overcharged. The battery capacity of small electric vehicles is basically 20 to 40 amps. Then, the cThe safe charging current of this battery is approximately 2 to 4 amps, and charging with a total current of 20 amps will definitely shorten the lifespan.
When using the range extender to stop and charge, you should pay attention to the charging current and avoid overcharging.
Which is better, the gasoline range extender for electric vehicles or the 220v gasoline generator with rechargeable bottle?
No matter how you calculate it, the extended runtime gasoline generator is better, because the output voltage of a 220V gasoline generator is 220 V, while the output voltage of electric vehicles is not lower than This voltage is higher than this voltage. Electric motorcycles will be lower than this, typically 48V-96V, while electric cars are much higher than 220V, and they all use DC. The electricity generated by gasoline generators must use switching power. supplies or liters. The voltage conversion circuit is then rectified to the applicable voltage before charging. The loss in this process is relatively large according to commercially available products.The conversion efficiency of power off power is generally 80-90%, and there are also some higher ones, such as more than 99%. , but these prices are extremely high, and electric vehicles will not choose such expensive power supplies!
Therefore, this loss of 10 to 20% is very considerable. Additionally, due to the relationship between the windings and the fuel tank, the volume and weight of the 220 V gasoline. The generator is significantly larger than the extended range motor. This extra weight also uses energy! So if you choose, there is nothing to say!
The extended range type seemsthe relatively simple and straightforward
The 220V type has various accessories such as output management
If you choose dual-use, if the range extended is used occasionally and is generally used most of the time in a 220 V environment, choose the 220 V type! If it is used with extended range, then the extended range model has no choice, otherwise it will be difficult for itself!
The range extender only needs to output a voltage of 54 to 56. It automatically adjusts the speed according to the battery voltage (so it is more efficient) and the charging current is also higher than that of a home charger. Charging is also faster. However, it is not recommended to use the range extender in place of a home charger for a long period of time. Because the charging current is higher than that used at home. The voltage emittedby the battery generator for a long time is 220V. If you charge an electric car, you must use an electric car charger. The electric car charger reduces the 220 V to a suitable voltage to charge the battery. the electric car battery is 48V, then the charger output. The voltage should be 54-56 V. There is an efficiency issue between reducing the voltage from 220 volts to 54-56 volts. Generally, the efficiency of a switching power supply charger is around 80%, which means that the final utilization rate of a 3000 watt generator is around 2400 watts (the theoretical value is actually less than this), of which 600 watts of power are lost during the conversion process! And because the output current of a home electric vehicle charger is relatively low, it takes more than four hours or even longer for a full charge. That is to say that theEnergy supplied by the motor during charging is still wasted (the electricity generated by the generator is stored there and the charger cannot use as much. This is equivalent to the generator being a one inch water pipe that constantly dripping water, and the charger is equivalent to A four-point faucet is installed on the one-inch water pipe of the generator It can only use a quarter of the water when it is. fully open)
Gentlemen who use electric vehicle range extenders a lot There are misunderstandings in use. In other words: only start the range extender when the electric vehicle battery is almost exhausted. This is highly undesirable. If the range extender is turned on at this time, it will charge the battery on the one hand and run the engine on the other hand. This will cause the range extender to be overloaded and easily damaged. . I recommend charging the electric vehicle with mains electricity before departure (mains electricity is cheaper) and then starting the range extender. If the journey is not far, it is not recommended to use a range extender (it is not advisable to increase the cost by 20%). more than four times).
To put it simply, the voltage symmetrical range extender is a straight path, and the 220 volt generator comes back in a big circle, so it's always about 'a range extender. GOOD.
One kilowatt motor with one kilowatt generator, 80 to 85 percent conversion efficiency. A charger with a good conversion rate can reach 85%, and will consume between 15% and 200-30% more during the journey. Because some mediocre charging equipment can't even reach 70%, let's go straight.
Range extenders are an illusion.
It seems like it can extend the reach, but in reality it serves no purpose.
Cars generally require 30 to 50 kW of power to maintain normal driving.
Find a 30 kW gasoline generator, which is a gasoline car with an additional generator.
The 3 kW gasoline generator can be used for automobile lighting,,,,
It n It's not flexible enough to charge the power bank.
Hello, the efficiency of the electric range extender is higher. The 220 volt generator is very inefficient when recharged from the battery via a charger. In fact, so is the effectiveness of the electric range extender. very weak. It is best to use it in an emergency. Yes, no motorcycle is more efficient when running directly with wheels, because it converts mechanical energy into electrical energy.e, the battery discharges and mechanical energy is transferred to the motor. In this way, a lot of losses are lost, so there are a lot of electric vehicles now, and some places do not check electric vehicles. The fatal weakness of electric vehicles is their short range, so now people are forced to install boosters in the city!
The usage cost of the range extender fuel generator is high, and the utilization rate of power conversion is low. In comparison, of course, the installation of photovoltaic panels on the roof to replenish electrical energy to the sun is higher. effective in increasing the mileage of electric vehicles and has a low cost of use.
(1) Now the voltage of electric vehicles is DC: 48 V, 60 V, 72 V.
(2) Gasoline generators ordinary generate 220 V AC, which must pass through a charger (transformator rectifier) to charge the battery of the electric vehicle. Constant voltage and low current charging.
(3) The gasoline range extender for electric vehicles is a direct current gasoline generator. It directly produces DC power corresponding to electric vehicles.
The propulsion circuit allows the electric vehicle to move; at the same time, there is also a charging circuit (protection and regulation function) that can charge the electric vehicle battery; .
(4) As long as the electric vehicle, generator, charger and range extender are of good quality. Their application effects are all available.
Of course, this saves money more directly. The electricity generated by the engine range extender is used directly. The electricity produced is charged with a charger, and there are prissues such as loss and conversion rate.
Let's put it this way, the water vapor after the work of the steam turbine unit must condense and release heat into the condensed water in the condenser (this process requires a large quantity of cooling water to absorb the heat released). spent steam. The quantity of cooling water is related to the quantity of cooling water in the turbine is not at all of the same order of magnitude.), again in the boiler for heating and vaporization, in the turbine for steam to carry out work, and so on. The gas turbine directly uses gas to drive the rotor to rotate and do work, and the exhaust gas is discharged to the atmosphere, and there is no condensation or recirculation of the exhaust gas . The gas turbine saves water because it does not require a condenser. The steam turbine group consumes ba lot of water because it requires a condenser. The amount of cooling water in the condenser is tens to more than a hundred times greater than the amount of condensed steam.