electric vehicles are a kind of "new energy" transportation that the world attaches great importance to, but it is not new in our country, especially two-wheel electric vehicles, as early as the 1980s, our country developed Innovative two-wheeled electric bicycles, after more than ten years of technological exploration, finally ushered in rapid popularity after 2003.
At the beginning of popularization, all the products of electric vehicles were mainly cheap. Therefore, many people have the stereotype that electric vehicles are a tool of the "poor". Nowadays, electric vehicles cannot be underestimated. Not only does it have a large number of vehicles, but it also has a lot of products. In addition to retaining the main cheap models, there are now tens of thousands of electric vehicle products on the market.
Of course, in addition to different brands and different prices, there is another change in electric vehicles, which is the change of the battery. As one of the three major components, the battery is not only enriched from the original single lead-acid battery, There are lithium batteries, graphene batteries, etc., and there are more choices from the rated voltage. From the earliest voltage of 48V before, now mainstream batteries have 60V and 72V more voltages, but many car owners The difference in voltage, the impact on electric vehicles, the storage capacity during charging, and how far they can run are not well understood. I will share these with you below.
What is the function of the battery of an electric car? Why is there a difference between 48 volts, 60 volts, and 72 volts, and what impact will it have on electric vehicles?
Let’s first understand the role of electric vehicle batteries. In fact, most people have a very good understanding of what batteries are used for. A common understanding of batteries is a device that “saves electricity”. Many people don’t know how to "save electricity". The battery uses a lead plate made of spongy lead on the negative electrode and a lead plate made of lead dioxide on the positive electrode.A device that converts electrical energy into chemical energy and stores it. When electric vehicles need to be discharged, they use chemical energy to convert electrical energy into electrical energy to power the electric vehicle .
Next, let’s take a look at why we need to set different battery voltages. The emergence of different voltages of 48 volts, 60 volts, and 72 volts is mainly to meet the different needs of consumers. The higher the voltage, the better the configuration. Naturally, the price will be more expensive. This is the "bargaining chip" for high-end electric vehicles to set high prices. Otherwise, they are all low-profile electric vehicles, and the price of the product will naturally not be increased.
Finally, look at the difference in voltage. The impact on electric vehicles is mainly in terms of power, speed and endurance. Because electric power = voltage × current, the higher the voltage and the larger the current, the greater the electric power, so the stored The more battery power, it means that you can run farther, pull heavier, and set the speed faster.
electric vehicles are equipped with 48-volt, 60-volt, and 72-volt batteries. How much power do they charge once? Have you ever been "curious"?
Now that electric vehicles are charged by the charging piles of the community, the owner only knows how many minutes can be charged with a coin of 1 yuan each time, but they don’t actually know how much power their electric vehicle needs. It’s full, some car owners are curious, but don’t know how to calculate how much electricity is needed for different voltages of 48 volts, 60 volts, and 72 volts. A small expert will help you figure it out. Let’s introduce the calculation formula first. Power consumption = charging voltage × battery rated capacity, but considering that the battery has the "undervoltage protection" function, so the charged power will be 1.05 times the discharge capacity, then power consumption = charging voltage × battery rated Capacity×1.05, and charging voltage=battery voltage×1.167 . According to this formula, calculate the battery capacity of a 48V, 60V, 72V electric vehicle with a battery capacity of 20AH, how much electricity is required for a full charge;
The theoretical power consumption for a full charge of a 48V electric vehicle is : the charging voltage of a 48V electric vehicle=48×1.167=56V,Electricity consumption of 48V12AH electric vehicles=56V×12AH×1.05=0.705KWH, which means less than 1 kilowatt-hour of electricity; electricity consumption of 48V20AH electric vehicles=56V×20AH×1.05=1.176KWH, which means less than 1.2 kilowatt-hours of electricity;
The theoretical power consumption for a full charge of a 60V electric vehicle is : the charging voltage of a 60V electric vehicle = 60×1.167=70V, and the power consumption of a 60V20AH electric vehicle=70V×20AH×1.05=1.47KWH, which is 1.4 Less than a kilowatt-hour; 60V32AH electric vehicle power consumption = 70V × 32AH × 1.05 = 2.352KWH, it needs more than 2 degrees of electricity to be fully charged;
72 volts fully charged theoretical power consumption is : 72V electric vehicle Charging voltage=72×1.167=84V, power consumption of 72V20AH electric vehicle=84V×20AH×1.05=1.764KWH, less than 1.8 kWh per full charge; power consumption of 72V32AH electric vehicle=84V×32AH×1.05=2.822KWH , A full charge is already close to 3 kilowatts.
Although the calculation formula looks cumbersome, this is the most scientific way to calculate power. Of course, there may be slight differences due to different battery quality, but basically the accuracy rate is still very high. Car owners can judge themselves based on this power consumption. Is the money spent on charging in the community expensive?
48V, 60V, 72V electric vehicles are fully charged, what mileage can they reach in theory?
So, since there is a big difference in the amount of power storage, there will naturally be differences in the cruising range. The following small experts also use the scientific calculation formula electric vehicle cruising range = battery power supply capacity (voltage × capacity) ÷Motor power (W) ×speed, to share the current mainstream 48V, 60V, 72V electric vehicle normal battery life,Car owners can check whether their electric cars are up to standard, and consumers who are going to buy cars can also come and match their battery life based on this battery life to match their electric car voltage.
48-volt electric vehicle cruising range: 48V electric vehicle battery capacity is mainly 12AH and 20AH, the motor power is 400W, the speed is 25km/h, and the calculation formula is 48V12AH The endurance of the electric vehicle = 48V×12AH÷400W×25km/h=36km, the same calculation method, the theoretical endurance of the 48V20AH electric vehicle is 60km.
60-volt electric vehicle cruising range: 60V electric vehicles have two main battery capacities: 20AH and 32AH, and the common motor power is 800W and the speed is 50 km/h. Then, the theoretical endurance of 60V20 electric vehicles =60V×20AH÷800W×50km/h=75km, the theoretical mileage of a 62V32AH electric vehicle is 120km.
72-volt electric vehicle cruising range: 72V electric vehicle battery size is generally 20AH and 32AH, and the motor power is 1000W is more common, the speed is 60 km/h calculation, 72V20AH electric vehicle cruising range=72V× 20AH÷1000W×60km/h=86km, the battery life of the 72V32AH electric vehicle can also be calculated as 138km according to the calculation formula.
The above is about the mileage of 48V, 60V, 72V and how much power is needed for charging. Although many bloggers have shared relevant content on the Internet, many of them are based on their own personal experience or Conjecture and inference, but the calculation method introduced above is a more scientific calculation method. Although charging is related to charger and battery, mileage is also related to load rate, motor type, and output efficiency.However, the theoretical data obtained through the above calculations still have a certain degree of feasibility, and you can refer to them.
I hope the above can help you, pay attention to electric car experts, and share information and opinions about electric cars every day.
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