How many batteries does a general electric car have?

It depends on what kind of battery you buy. Electric vehicle battery is commonly lead-acid batteries, each battery is 12 v, capacity has 10 ah [wAh], 12ah, 14ah, 17ah, 20 ah. The greater the number, the larger the capacity, the farther the car can run, and the price is also higher. However, 17 ah and 20 ah have bigger size. You need to check whether your car battery box can take in the battery. Buying battery mainly depends on how many blocks your car have, and what capacity you want. Good brand batteries include Panasonic, Tanon, AMD, Webforge, Sail, etc. More than one hundred yuan is for one battery, which can use for two years or so.

Only one battery pack, different models in different working voltage, electric bicycles and 48 v working voltage is 36 v two kinds, according to the joint in series form, and generally speaking, there are 2 to 6 block of single battery connected to a battery pack.

1, the lack of capacity data and assumptions is to use 72 v200ah battery,

2, the charging time, power consumption = 72 * 72 * 130% * 80% * 150% / 1000 = 22.464 KWH,

3, charging, the battery is to convert electrical energy into chemical energy, conversion efficiency by about 50%,

4, discharge, the battery can discharge is 80% charge, over discharge, can lead to shorten the battery life, battery over discharge, its life shortened by 80%,

5, the charger efficiency is about 70% on average.

The same weight ternary lithium battery than lithium iron phosphate batteries long range. But its shortcomings are obvious, when its temperature is 250-350 ℃, internal chemicals began to decompose, thus puts forward high requirements on battery management system, the installation of insurance device need batteries separately for each section, in addition, due to the monomer volume is small, so the bike to battery monomer quantity is very large, it has further increased the difficulty of control for the battery management system.

Ni-Mh batteries are another mainstream at present except the lithium battery electric vehicles power battery species, in the 1990 s after the gradual development. Its energy density and the normal lithium battery gap is not large, about 70-70 wh/kg, but as a result of monomer battery voltage is only 1.2 V, is the 1/3 of lithium batteries, so in certain cases, the demand voltage of the battery pack some volume than lithium batteries. As with lithium battery, nickel metal hydride battery also need battery management system, but pay more attention to the battery charge and discharge management. Reason is because the Ni-Mh batteries has "memory effect", namely the battery capacity will appear in the process of circulation charge and discharge attenuation, and excessive charge or discharge, is likely to increase battery capacity loss (lithium batteries the characteristic almost negligible).So for vendors, nickel metal hydride battery control system will take the initiative to avoid excessive charge and discharge in the set, such as the battery charge and discharge interval artificially controlled within a certain percentage of the total capacity, in order to reduce capacity attenuation speed.

Fuel cell is the most ideal energy future. Fuel cell is not "battery", accurately, a large power system. Due to high energy conversion efficiency, no pollution, long service life, stable operation, etc. by the industry recognized as the best energy future. In simple terms, the fuel cell is convert chemical energy to electrical energy by chemical reaction, a device and a source of energy is mainly rely on the continuous supply of fuel and oxidant.

Pure electric vehicles is powered by car power, with the motor driven wheel drive, conform to the requirements of road traffic and safety regulations of the vehicle. Due to the traditional car small impact on the environment, and its prospect is widely, but the technology is not yet mature.

Pure electric vehicles (Battery electric vehicle, BEV for short), it is completely by the rechargeable battery (such as lead-acid batteries, nickel cadmium, nickel metal hydride batteries or battery lithium ion batteries provide power supply of car).Although it is a long history of 134 years, but has been limited to some specific within the scope of application, market is small. The main reason is due to the various types of batteries, widespread price is high, short service life, appearance such as large size and weight, the charging time serious faults.

Composition

Electric car components include: electric drive, drive and control system

Power transmission device such as a mechanical system, complete the task of work, etc. Electric drive and control system is the core of the electric car, the biggest difference is also different from internal combustion engine car. Electric drive and control system by the drive motor, power supply and motor speed control device, etc. Electric cars of other devices basic same as the internal combustion engine car.

For electric vehicle drive motor power, motor power into mechanical power. Is the power of the most widely used lead-acid batteries, but with the development of electric vehicle technology, lead-acid batteries because of the low energy, charging speed, short service life, gradually replaced by other batteries. Is the power of the development are mainly sodium sulfur batteries, nickel-cadmium batteries, lithium batteries, fuel cells, etc., these new type of power supply applications, opened up broad prospects for development of electric vehicles.

Is the role of driving motor power into mechanical power, through the transmission gear or direct drive wheel working device. But dc motor due to commutation spark, small power, low efficiency, maintenance workload; Along with the development of motor control technology, will gradually be brushless dc motor (BLDCM), switch reluctance motor (SRM) and was replaced by ac asynchronous motor, if there is no direct current series motor shell disc axial magnetic field.

Speed control device

Motor speed control device for the speed and direction of the electric vehicle conversion Settings, such as its function is to control the voltage or current of the motor, complete control of the driving torque of the motor and the direction of rotation.

Early electric cars, dc motor speed control using concatenated resistance or change motor magnetic field coil number of turns. Because of its speed is a stage, and will produce additional energy consumption or use the motor structure is complex, is now rarely used. Widely used on the dc chopper is thyristor, changing the terminal voltage of the motor by evenly, control the current of the motor, to realize the stepless speed of the motor. In the continuous development of electronic power technology, it also gradually by other power transistor (into the decision, MOSFET, BTR and IGBT, etc.) replaced chopping speed regulation device. From the perspective of the development of technology, along with the application of new type of drive motor, electric vehicle speed control is transformed into the dc inverter technology application, will become the inevitable trend.

In the drive motor rotate to transform control, dc motor depend on contactor change the armature or the current of the magnetic field direction, realize the motor rotate to transform, which makes the circuit complexity, lower reliability. When driven by ac asynchronous motor, the motor to the change of three phase current phase sequence can simply transform field, can make the control circuit is simplified. In addition, the ac motor and frequency control of motor speed control technology, makes the control of the electric car braking energy recycling more convenient, more simple control circuit.

The role of the electric automobile transmission device is to pass the driving torque of motor to automobile drive shaft, when the use of electric wheel drive, drive often most of the components can be ignored. Because motor can load startup, the electric cars without traditional internal combustion engine automobile clutch. Because of the drive motor can rotate to control electric circuit implementation transform, so the electric car reverses in the auto transmission without internal combustion engine. When using motor stepless speed control, electric vehicles can be ignored the traditional car transmission. In the use of electric wheel drive, the electric car can also omit the traditional internal combustion engine vehicle drive system differential.

The function of driving device is the driving torque of the motor through the wheel into the ground forces, driven wheel to walk. Its form is the same with other car, the wheels, tires and suspension, etc.

Steering gear is set up for the realization of the car turning, the steering machine, steering wheel, steering and steering wheel, etc. Effect on the steering wheel control, through the steering machine and steering mechanism makes the steering wheel deflection Angle, realizes the auto steering. Most electric cars for the front wheel steering, used in the industrial electric forklift often USES the rear wheels. Electric vehicle steering device has mechanical steering, hydraulic steering and the type of hydraulic power steering, etc.

The electric car braking device with other cars, is set up for the cars to slow down or stop, usually composed of brake and its control device. On electric cars, general and electromagnetic brake device, it can be used to drive motor control circuit of the power running of the motor, the deceleration braking when the pair of energy conversion, the battery charging current, and recycling is obtained. The current domestic electric cars in high-power passenger cars, to provide air brake equipment have endurance NAILI sliding-vane compressors, air is compressed air brake.

Industrial work device is used specially for electric cars for complete requirements, such as electric forklift lifting devices, door frame, pallet fork, etc. Pallet fork lifting and door frame tilt is usually performed by motor driven hydraulic system.

The page contains the contents of the machine translation.