A range extender refers to an electric vehicle component that can provide additional electrical energy so that an electric vehicle can increase its range. In the traditional sense, a range extender refers to a combination of an engine. and a generator.
An extended range electric vehicle is an electric vehicle that uses other energy sources (such as gasoline) to replenish electrical energy when battery power is low. insufficient. The main characteristics (concept) of operation of electric vehicles are that in most cases (high probability) they operate in pure electric mode, and in a few cases (low probability) they operate in extended range mode, that is- i.e. the electrical energy generated by the range extender is supplied to the motor via the battery and, at the same time, it can also charge the batteryterie.
Chinese academia and the Ministry of Science and Technology generally believe that extended-range electric vehicles belong to the field of pure electric vehicles, not hybrid vehicles. Compared with other hybrid vehicles, extended-range electric vehicles have a simple configuration system, and more importantly, more reliable performance and lower costs. Compared with pure electric vehicles, extended-range electric vehicles have a driving range of worry-free cruising and lower costs; The cost of. Judging from the technical environment and market demand in 2019, extended-range electric vehicles are one of the products with the greatest industrialization prospects.
The role of the range extender
It is not recommended to start the range extender when the battery is full. He isgenerally recommended to start the scope. The extender when the battery is only at 30% to 40% is the best time to start. There is no particularly good effect when starting when the battery is full. To protect the environment, it is recommended to start the range extender when necessary. Battery pollution is more serious than exhaust pollution.
Range extenders include four-wheel, three-wheel and two-wheel vehicles; four-wheeled vehicles can be divided into high-speed vehicle range extenders and low-speed vehicle range extenders can be divided; in different types depending on the cooling fluid of the generator. Water-cooled range extenders and air-cooled range extenders can be divided into dual-frequency conversion range extenders and prolonsingle frequency conversion range gators based on their functions; High-speed vehicles include 48V, 60V and 72V.
Range extenders can be divided into built-in range extenders without installation and range extenders that need to be installed according to of the difficulty of installation. The range extender is a range extension device for electric vehicles and cannot be installed. used as a power bank. Its function It is mainly intended for emergency use. It should be used when battery power is insufficient. Remember not to use it when the battery is discharged.
What is an electric vehicle range extender?
Hello, the range extender should be more effective
< p>Generate Electricity The voltage generated by the machine is 220 V. If you charge a vehicleelectric vehicle, you must use an electric vehicle charger. The electric vehicle charger reduces the 220 V to a suitable voltage for battery charging. is 48V, then the output voltage of the charger should be between 54-54V 56V. 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! andSince the output current of a home electric vehicle charger is relatively small, it takes more than four hours or more for a full charge. That is, the energy supplied by the motor during charging is still wasted (the electricity generated by thegenerator 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. of water, and the charger is equivalent to A quarter point faucet is installed on the one inch water pipe of the generator When fully opened, it can only use a quarter of the water) < /p>
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 in place of a home charger for a long period of time. Because the charging current is higher than that used at home. This will damaget 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 safe charging current of this battery is around 2-4 amps, and charging with a total current of 20 amps will definitely shorten the lifespan.e of life.
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. Electricity generated by gasoline generators must use switching power. Foods or liters. The voltage conversion circuitis then rectified to the applicable voltage before charging, and the loss in this process is relatively large. The conversion efficiency of commercially available switching power supplies is generally 80% to 90%, and there are also more. these, like more than 99%, but these The price is extremely high, and electric vehicles will not use 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 seems relatively simple and straightforward
The 220V type has various accessories such as output management
If yous choose it is for dual use, extended range is used occasionally and usually used in 220V environment most of the time, so choose 220V 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 output by the battery generator for a long time is 220V. If you charge an electric car, you must uUse 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, the energy supplied by the motor during charging is still wasted (the electricity generated by the generator is stored there et the charger can't use that 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 four-point faucet is installed on the one-inch water pipe of the generator. It can only use a quarter of the water when fully opened)
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 recharging the electric vehicle with mains electricity before departure (mains electricityr is cheaper) then start 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, which can reach 85%, consumes 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 might extend the reach, but in reality it doesn't do any good.
Cars requiregenerally require a power of 30 to 50 kW to maintain normal driving.
Find oneA 30 kW gasoline generator 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 used in an emergency. Yes, no motorcycle is more efficient when driving directly with wheels, because it converts mechanical energy into electrical energy, the battery discharges and the mechanical energy is transferred to the motor. In this way, a lot of losses are lostes, so there are a lot of electric vehicles now, and some places don't check for 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 ones generate 220 V AC, which must pass through a charger (rectifier transformer) to charge the electric vehicle battery. 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) which 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 problems such as loss and conversion rate.
Which is better, an air cooled generator or a gewater-cooled nenerator?
1. To put it bluntly, a range extender is a generator powered by a small gasoline engine. This type of generator The calibrated power can only be delivered when the engine is running at full load. And to charge the battery, you need to cooperate with the rectifier circuit. With the current efficiency, the range extender can indeed not increase the distance much, but lithium batteries are relatively expensive, so they still have a certain place in the market.
2. The main function of the range extender is not to charge the battery, but to provide auxiliary power when your battery is low to reduce battery loss. Another function is to prevent you from being left behind after use. the battery is exhausted. Some people may say that the range extender is a generator, which can reach a dUnlimited battery life as long as there is oil.
3. Compared with pure electric vehicles, the range extender of extended range electric vehicles can charge the battery while the vehicle is driving, which greatly increases the cruising range of the vehicle, and is equipped with the vehicle's on-board power battery is much smaller than the power battery of pure electric vehicles of similar models, which greatly reduces vehicle manufacturing and production costs.
Detailed information
Electric vehicle battery maintenance:
1. It must be fully charged before use. Newly purchased electric vehicles must be fully charged before use. Since many electric vehicles have been sitting in stores for several months or even more than half a year, they must be completecharged before use. It is better not to use them immediately after being fully charged, but to let them stand for about ten years. minutes.
2. The battery must be firmly installed on the electric bicycle. Remove the battery to charge it. When installing, the battery should be firmly installed on the electric bicycle to prevent it from being damaged by vibration while riding. When transporting the battery, it is prohibited to throw, roll or strongly squeeze it.
3. Keep the battery dry and clean. Always remove dust and dirt from the battery cover and keep the battery dry and clean to prevent it from self-discharging.
4. Develop a good habit of charging the battery every evening. Never leave the battery in a low consumption state for a long time and make it a habit to charge the batteryevery evening. If it is not used for a long time, it should be fully charged, placed in a cool and dry place and charged regularly, generally 10 days.
5. Use the pedal when starting. When an electric bike is just started, you need to use pedals. If there are no pedals, you can use your feet to push the floor to help get started. When going uphill, use the pedals to help the electric bike go uphill to avoid excessive discharge. current and battery damage.
References:
Water cooling has better heat dissipation performance than air cooling, but water cooling is larger in size. If you want a car-mounted option that is small, beautiful, and quiet, you can only use a generator.air-cooled parking lot. The above is what our company 24V DC digital intelligent parking generator is widely used in the field of truck parking air conditioning.
Recommendations for using the range extender:
It is not recommended to start the range extender when the battery is full. It is generally recommended to start the range extender when the battery is only charged. 30%-40%. There is no particularly good effect when starting when the battery is full. To protect the environment, it is recommended to start the range extender when necessary. Battery pollution is more serious than exhaust pollution. It is not recommended to use it when the battery is low. The range extender starts electrically. It may not start when the battery is low.