What is the relationship between the voltage and performance of electric vehicles?

Do you mean the voltage of electric car? It has 48 V, 64 V, 74 V and 80 V.

From the technical content, the higher the voltage, the better the electric performance and economic efficiency is. The battery of electric cars with assembly of five or six batteries has better comprehensive performance than that has 4 batteries. Use it for a long time is also more convenient than using 48V electric cars with four batteries and save more money. This is the developing direction of the electric vehicle in the future. But the high voltage electric car has difficult coefficient on production, and few manufacturers are qualified to produce it, so most enterprises on the market at present still mainly sales electric vehicles with four batteries. Its price is lower, and those with assembly of five or six batteries are slightly higher. Besides the technical difficulty coefficient, the high voltage electric cars also have voltage regulation circuit, controller, motor, and its frame is far better than 48 V vehicles. It not only has large power, fast speed, long distance, long cycle life, and it also has one or two more batteries. Nowadays, 48V four-battery electric vehicles, like at the beginning replacing 36V three-battery electric vehicle, is about to complete its historical mission, and will be replaced by the electric vehicles with five or six batteries.

General super a battery power is no problem, if the 48 v motor, your battery is 60 v that you want, and speed will increase, not again big, you don't think the car runs slowly, and the speed limit line also pulled out, think there is a good variety of speed, overpressure, which is in front of me said with a battery (this is only a good quality control, bad is sooner or later), or a large control, tube is also big, another is to change the type of motor, match again a wattage is greater than the motor control, tube is also big, motor is the transit 800 w ~ 3000 w is more than five hundred, and then change the external control 1500 w24 tube (500 ~ 700), package to 55 yards above you drive (using GPS speed), the original table code words in more than 80,

48 v electric cars is also divided into with power (that is, with the pedal) of electric cars and electric motorcycle without help, the tracking feedback information statistics, with power electric vehicle lead-acid battery life due to most is the cause of water loss and sulfide, and electric motorcycle lead-acid battery life all reasons in addition to the above two, but also because of large current discharge, often lead to positive plate to soften, active substances, this softening of the positive plate, is a physical damage, is irreparable. And water loss and vulcanization is a physical damage, can be restored. Taobao have we made in Jinzhou, white battery capacity restorer, can repair sulfide, then add some water to the accumulator, the four basic can restore the capacity of the battery to around 85%.The following is a friend who buy sea, battery capacity restorer, see from evaluation, the friend is a professional.

Taobao sea, about 48 v battery capacity restorer of professional evaluation: "very magical, installed capacity of the restorer, I try to feed fresh water into the battery: first uncovered the lead-acid battery sealing strip per day, with a rubber cover, each filled with battery supply liquid, open wide type charging to the full, remove the overflow liquid, covered with rubber cover, AB glue sealing on the sealing strip, the capacity of necessarily rose from 20 to ninety-five, darling, really great, the province 7800 ocean, by the way, my battery is 48 v20a, with electric heating silk string before the battery discharge at the poles of each battery voltage, the difference between each section no more than one v, suggested friends check beforehand, and conditions are simple! Buy a heating wire is cheap, no way to long in the new, make section used batteries is about forty,

1, the battery is not the car boss said that two pieces of battery lags behind, which might affect the entire group of battery discharge capacity.11 v and 10 v that two pieces of voltage drop quickly, it is easy to form a discharge and damage.

2, in the two pieces of old batteries, four pieces is about 12 v, add some water, reoccupy white best battery capacity restorer except the sulfide, mileage would be more than the original, and is often not just a little more.

3, maintenance-free also need to add water and sulfide, the top cover plate stand aside, will see six and fluid. After adding water, sea, battery capacity restorer in addition to the plate, with luck, the four groups of battery capacity will reach more than 85% of the new battery, save the cost for battery 7800.

4, he changed the old battery method, it is very economic. But not the most economical, the most economical is fill some water, and then on Taobao buy a white battery capacity restorer to in addition to the vulcanization, this method is the most economic. You will be like the friend, save several hundred lead-acid battery replacement costs.

1. Battery not line, that is to say the battery life can't, you are the two pieces of low voltage if a separate charge, can also charge is so high voltage

2. If the two is better than two pieces of original, in the range of natural increase

3. All batteries are now free maintenance, not as before to add water, but with a prosthesis and regularly add liquid to maintain or to extend battery life, general theory is extended three to six months

4. This method is only temporary,

It is best to use the battery power meter measurement under the stand or fall of each battery, he then changed into new, usually pay attention to don't drive to the battery is still open, often charging at ordinary times, but don't charge for too long

1, the no-load voltage charger - for three phase charger is float charging voltage, the voltage is usually a single battery is 13.5 v to 13.5 v (generally marked the battery, also can find it out according to the manual), then for 36 v is: 40.5 v to 40.5 v, 48 v for are: 54 v to 55.2 v. Therefore the error of considering your multi-meter, 53.6 v and 55.6 v seem to belong to normal, after all, has entered the stage of floating and has set up a lamp, so the value is not very demanding.

2, charger of the termination voltage - this is the so-called turn lamp voltage, voltage is usually a single battery is 14.4 v to 14.4 v (generally marked the battery, also can find it out according to the manual), then for 36 v is: 43.2 v to 43.2 v, 48 v for are: 57.6 v to 57.6 v.

3, the actual charger of the termination voltage - for sealed battery, its value should be 2.4 V per cell. Cell is the best, so corresponding 36 V to 43.2 V, 48 V to 57.6 V. But in fact is to raise the value, appropriate for charging time and "full" to consider, namely 36 v 44.4 44.8 v, 48 v to 59.2 v to 59.2 V, but such easy to cause water loss, shorten the battery life, cut both ways. Here to find out it is not easy, as long as know how to determine the voltage value is ok.

48 v batterySet in the condition of full electric voltage at 53.2 V

48 V electric vehicles set by the voltage is 41.5 ~ 43.5 V, on the road must not more than by the voltage, don't stand for a period of time after empty electricity run again, can cause over discharge, adverse to the battery life.

48 V battery when charging the highest voltage at 59.2 V. Let stand for a few hours after a full charge after the voltage stability at about 53.2 V.

Now most of the electric car battery every 12 v, 4 piece of battery for 48 v, 5 piece of battery for 60 v, but there were a few so-called 'electric motorcycle' electric vehicle battery for each of the 16 v, sharing four battery voltage of 64 v

Can be adopted in the electric bicycle has the following four kinds of motive battery, namely the valve-controlled lead-acid maintenance-free, colloid lead-acid battery, nickel metal hydride batteries and battery lithium-ion batteries。

Lead-acid battery

Lead-acid batteries because of its low price, rich source material, higher than the power, technology and manufacturing technology is mature, resource recovery rate higher comprehensive factors are widely studied and various electric car widely used in other countries. Electric bicycle as energy saving, convenient, fast, comfortable, cheap, zero emissions of personal transport, has been widely accepted and brought to the attention of the relevant state departments. By the state council development research center, the national development and reform commission, ministry of construction, ministry of science and technology and other ministries involved in the light electric vehicle industry development strategy research group put forward "light electric vehicle industry development strategy research" report. The national ownership electric bicycle has amounted to more than 30 million vehicles. More than 95% of the electric bicycle with valve-controlled lead-acid batteries.[1]

Have the vast majority of commercialization of the electric bicycle is the use of sealed lead-acid battery, don't need to supplement moisture, often in use free maintenance. The main chemical reaction is: PbO2 + 2 - h2so4 - > 2 + Pb please recharge and discharge pbso4 + 2 h2o

Lead-acid battery charging into lead sulfate of Yin and Yang of spongy lead fixed in the sulfuric acid content of the release to the electrolyte, respectively, to become spongy lead and lead oxide, sulfuric acid concentration in the electrolyte grows; Otherwise discharge lead oxide in the anode and the cathode plate of spongy lead react with sulfuric acid in the electrolyte into lead sulfate, and the concentration of sulfuric acid in the electrolyte coming down. When lack of lead-acid battery charging, Yin and Yang are two plate of lead sulfate not completely transformed into a spongy lead and lead oxide, if lack of charging for a long time, can cause lead sulfate crystallization, made the plate, the battery quality becomes worse; Conversely if the battery overcharge, the anode is greater than the amount of oxygen the cathodic adsorption ability, make the battery internal pressure increases, lead to gas overflow, electrolyte, can also lead to active material softening or fall off, battery life is greatly reduced.

Comprehensive performance has greatly improved

In recent 10 years, the comprehensive performance of electric bicycle with valve-controlled lead-acid batteries has greatly improved.6 - DZM - 10 cells, for example. In 1997, the type of battery capacity deficiencies, 2 h rate discharge capacity of less than ten (5 a) ah; Less than the energy, the rate of 2 h than energy less than 30 Wh/kg; Life is short, 100% depth of discharge cycle life of only 50 ~ 60 times (capacity to 8 before ah; The service life of the same below), only 3 ~ 5 months.

By 2003, 2 h rate discharge capacity (5 a) 11 ~ 13 ah;2 h rate than energy reached 33 ~ 36 Wh/kg;100% depth of discharge of the cycle life of 250 ~ 300 times, the service life can reach more than 12 months. Electric bicycle with valve-controlled lead-acid battery problems solved basically.

Deep cycle life performance of this type of battery is new, breakthrough. Main show is: 2 h rate discharge (5 a) initial capacity of 14 ah;2 h rate than energy thirty-eight Wh/kg;100% depth of discharge cycle life of more than 400 times, sent out a total capacity of 4500 Ah, the corresponding total mileage of about 18000 km (with 4 km/Ah, the same below).The deep cycle life of more than 600 times, sent out a total capacity of 6151 ah, the corresponding total mileage of about 24600 km. If the capacity is lower than 7 ah life ending flag, deep cycle life of 943 cycles, sent out a total capacity of 8710 ah, the corresponding total mileage of about 34800 km. If according to the deep cycle life of 250 times or out of a total capacity of 2250 ah, the corresponding total mileage of 9000 km of the battery pack can be used guarantee 1 year.[1]

Attach importance to match with charger

After years of practice, the use of electric bicycle vehicle manufacturers and battery manufacturers are gradually understood the battery and the importance of the matching between electric drive system related equipment, especially with the matching of the charger. Manufacturing quality is the precondition of battery quality, but only with matching chargers are used together, can play the superior performance of the battery with high quality, high quality battery cannot fully develop its potential superior performance.[1]

Different manufacturer of battery in the formula, structure, acid concentration and other differences, the appropriate charging parameters are different. For example, in our study, we found that different manufacturer battery charge in the stage of constant pressure parameters can vary from 1.5 V to 2.0 V (36 V battery).Proper charging parameter basic requirements are: to ensure that the battery can be full of, not due to owe charging battery capacity of normal attenuation; And make sure the battery during the whole life will not cause by charging battery severe water loss and thermal runaway.[1]

Pure electric vehicle lead-acid batteries

Early opening of the pure electric vehicle type lead-acid batteries adopted the "8 · 5" plan during the research, has made available to the successful experience of 19 months (120000 km), the key is accumulated a good control of charging methods, the depth of discharge, the filling water in time a system that matches the work experience and careful maintenance experience. In recent years, four-wheel vehicle (including tourist car, car, golf carts, short road car, etc.) development soon, the car USES the most is the open type lead-acid batteries. Corresponding models of battery get the favor of battery manufacturers.[1]

Electric car uses new products of valve control type sealed lead-acid battery, its performance is: 3 h 55 Ah capacity; 3 h under rate specific energy is 33 84 Wh/kg and Wh/L; 75% discharge depth and the cycle life reached more than 400 times. Believe that the electric bicycle with valve-controlled lead-acid batteries successful experience can be extended to electric vehicle valve-controlled lead-acid batteries, and the performance will be further improved.

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