CN201400078Y - an electric car - Google Patents

Abstract

An electric vehicle, the electric vehicle comprises a power battery pack (10), an electronic throttle (20), a motor controller (30), a motor, a drive shaft (50), a front wheel (61) and a rear wheel (62), the The electronic throttle (20), the motor controller (30) and the power battery pack (10) are electrically connected in sequence, wherein the power battery pack (10) is composed of lithium iron phosphate batteries; the motor includes a front drive motor (41 ) and the rear drive motor (42), the output shafts of the front drive motor (41) and the rear drive motor (42) are respectively connected to the front wheel (61) and the rear wheel (62) through the transmission shaft (50); The motor controller (30) is electrically connected to the front drive motor (41) and the rear drive motor (42) respectively. The electric vehicle provided by the utility model has the advantages of no pollution, long mileage for one charge and strong power.

Description

an electric car

technical field

The utility model relates to the field of electric vehicles.

Background technique

At present, the automobile industry provides the following models to replace traditional fuel vehicles in response to energy shortages and increasingly serious environmental pollution problems: fuel cell vehicles, hybrid vehicles and electric vehicles. Among them, electric vehicles that can achieve zero emissions and zero pollution are undoubtedly the best choice among the above-mentioned models. However, the existing electric vehicles generally use nickel metal hydride batteries, lithium batteries, fuel cells, etc. for power supply. Since the capacity of the above batteries is not high, the electric vehicles have the disadvantage of low driving range.

Utility model content

In order to solve the defects of insufficient driving mileage and poor power performance of existing electric vehicles, the utility model provides an electric vehicle capable of driving a long distance with one charge and having good power performance.

The electric vehicle provided by the utility model includes: a power battery pack, an electronic throttle, a motor controller, a motor, a transmission shaft, a front wheel and a rear wheel, and the electronic throttle, the motor controller and the power battery pack are electrically connected in sequence, wherein the The power battery pack is composed of lithium iron phosphate batteries; the motor includes a front drive motor and a rear drive motor, and the output shafts of the front drive motor and the rear drive motor are respectively connected to the front wheel and the rear wheel through the transmission shaft; The motor controller is electrically connected to the front drive motor and the rear drive motor respectively.

Since the lithium iron phosphate battery has the characteristics of high energy and high capacity, its specific energy can reach more than 1000w/kg, so that the driving range of the electric vehicle provided by the utility model can reach more than 400km, which is much higher than that of the existing electric vehicles. car. In addition, the use of dual motors enables electric vehicles to output high power to meet their power needs in various road conditions.

Description of drawings

Fig. 1 is the simplified structural representation of the electric vehicle provided by the utility model;

Fig. 2 is a schematic structural view of the electric vehicle provided by the utility model.

Detailed ways

Describe the utility model in detail below with reference to accompanying drawing.

As shown in Figure 1, the electric vehicle provided by the utility model includes a power battery pack 10, an electronic accelerator 20, a motor controller 30, a motor, a transmission shaft 50, a front wheel 61 and a rear wheel 62, and the electronic accelerator 20 is connected with the motor control The device 30 and the power battery pack 10 are electrically connected in turn, wherein the power battery pack 10 is composed of a lithium iron phosphate battery; the motor includes a front drive motor 41 and a rear drive motor 42, and the front drive motor 41 and the rear drive motor 42 output The shafts are respectively connected to the front wheel 61 and the rear wheel 62 of the electric vehicle through the transmission shaft 50; Operate to chop the DC current output by the power battery pack 10 into high-voltage alternating current, provide the high-voltage alternating current to the front drive motor 41 and the rear drive motor 42 , and thereby control the speed and torque of the front drive motor 41 and the rear drive motor 42 .

Among them, the adoption of dual motors can provide sufficient boost for electric vehicles, and the front drive motor 41 and the rear drive motor 42 can use permanent magnet synchronous brushless motors, which have high power density and efficiency and a wide speed regulation range The advantages. The lithium iron phosphate battery can be FV200 lithium iron phosphate battery. The battery has the characteristics of high energy and high capacity, and can well satisfy the operation of the front drive motor 41 and the rear drive motor 42, thereby providing good power performance for the electric vehicle and prolonging the driving range of the electric vehicle on one charge.

As shown in FIG. 2, preferably, the electric vehicle further includes a battery manager 70, which is connected to the power battery pack 10 for detecting charging, charging, temperature and humidity of the power battery pack 10. etc., when the power of the power battery pack 10 is insufficient, an alarm signal can be sent to prompt the user to charge it.

As shown in FIG. 2 , the electric vehicle further includes a fast charging interface 81 and a slow charging interface 82 , which are respectively electrically connected to the power battery pack 10 . When using the slow charging interface 82 to charge the power battery pack, the 220V commercial power can be used to slowly charge the power battery pack 10, and the power battery pack 10 can be fully charged within 8 hours; When the interface 81 is charging the power battery pack, the high voltage of 380V can be used to charge the power battery pack 10, so that the power battery pack 10 can be filled with more than 50% of the power within 8 minutes, which improves the charging speed. The above-mentioned fast charging interface 81 and slow charging interface 82 can be applied to different charging environments, which well meet the needs of users, so that the charging of the whole vehicle is no longer a problem.

As shown in FIG. 2 , the electric vehicle provided by the present invention may include an air conditioning system 101 , a cooling system 102 , a braking system 103 or an electric power steering system 104 , and these systems are powered by the power battery pack 10 . Certainly, the electric vehicle of the present invention may also include other electrical equipment, and is not limited to the above-mentioned systems 101-104.

Since the rated voltages of the above-mentioned systems 101-104 are different, the output voltage of the power battery pack 10 is generally lower than the rated voltages of the above-mentioned systems 101-104, and the characteristics are relatively soft, that is, as the output current increases, the voltage drops The range is relatively large. In order to match the voltage output by the power battery pack 10 with the rated voltage of the above-mentioned systems 101-104, as shown in FIG. 2, the electric vehicle further includes a DC-DC converter 90 connected to the Between the power battery pack 10 and the air conditioning system 101 , the cooling system 102 , the braking system 103 or the electric power steering system 104 , it is used to convert the output voltage of the power battery pack 10 into a voltage suitable for various above-mentioned systems. For the air conditioning system 101 , the cooling system 102 and the brake system 103 , the DC-DC converter 90 provides them with a voltage of 12V, and for the electric power steering system 104 , the DC-DC converter 90 provides them with a voltage of 24V.

Wherein, as shown in Figure 2, the electric vehicle of the present utility model also includes a gearbox 110 and an electronic shifting device 120, and the gearbox 110 is connected between the transmission shaft 50 and the output shafts of the front drive motor 41 and the rear drive motor 42 , the electronic shifting device 120 is connected with the gearbox 110, and is used to receive the driver's shift command, and adjust the gear position of the gearbox according to the shift command, and then adjust the speed and torque of the front and rear wheels 61 and 62.

As shown in Figure 2, preferably, the electric vehicle also includes a power distribution box 130 and a strong electric safety system, and the power distribution box 130 is connected between the power battery pack 10 and various power consumption and charging equipment (for example, motor between the controller 30, the DC-DC converter 90, the fast charging interface 81, and the slow charging interface 82). The strong current safety system includes a maintenance switch 131, a leakage sensor 132 and a battery fuse 133, and the maintenance switch 131 is connected between the distribution box 130 and the power battery pack 10, so that the maintenance switch 131 can be directly controlled. Disconnect the power battery pack 10 to ensure that all relevant components except the power battery pack 10 have no high-voltage connection, which is convenient for vehicle problem maintenance or other operations; the leakage sensor 132 is connected between the battery manager 70 and the distribution box 130 , used to detect the degree of leakage of the high-voltage circuit of the vehicle, so that the battery manager 70 provides different levels of protection against the degree of leakage; the battery fuse 133 is connected to the power battery pack 10, and is used for In the event, the internal connection of the power battery pack 10 is directly disconnected to realize the most thorough high-voltage circuit breaker protection. The high-voltage safety system can cut off the high-voltage output of the power battery pack 10 in different ways under different conditions, which well solves the problem of high-voltage safety of the entire vehicle.

On the whole, the electric vehicle provided by the utility model has the advantages of no pollution, long mileage on one charge, strong power and high safety.

Claims (8)

1. An electric vehicle comprising a power battery pack (10), an electronic throttle (20), a motor controller (30), a motor, a transmission shaft (50), a front wheel (61) and a rear wheel (62) , the electronic throttle (20), the motor controller (30) and the power battery pack (10) are electrically connected in sequence, and it is characterized in that, The power battery pack (10) is made up of a lithium iron phosphate battery; Described motor comprises front drive motor (41) and rear drive motor (42), and the output shaft of this front drive motor (41) and rear drive motor (42) passes through described transmission shaft (50) and described front wheel (61) respectively. It is connected with the rear wheel (62); the motor controller (30) is electrically connected with the front drive motor (41) and the rear drive motor (42) respectively. 2. The electric vehicle according to claim 1, wherein the lithium iron phosphate battery is an FV200 lithium iron phosphate battery. 3. The electric vehicle according to claim 1, characterized in that the electric vehicle further comprises a fast charging interface (81) and a slow charging interface (82), and the fast charging interface (81) and the slow charging interface (82) are respectively electrically connected to the power battery pack (10). 4. The electric vehicle according to claim 1, characterized in that the electric vehicle further comprises an air conditioning system (101), a cooling system (102), a braking system ( 103) or electric power steering system (104). 5. The electric vehicle according to claim 4, characterized in that the electric vehicle further comprises a DC-DC converter (90), and the DC-DC converter (90) is connected to the power battery pack (10) Between the air conditioning system (101), the cooling system (102), the braking system (103) or the electric power steering system (104). 6. The electric vehicle according to claim 1, characterized in that the electric vehicle further comprises a gearbox (110) and an electronic shifting device (120), and the gearbox (110) is connected to the transmission shaft ( 50) Between the output shafts of the front drive motor (41) and the rear drive motor (42), the electronic shifting device (120) is connected to the gearbox (110). 7. The electric vehicle according to claim 1, characterized in that the electric vehicle further comprises a battery manager (70), and the battery manager (70) is connected to the power battery pack (10). 8. The electric vehicle according to claim 7, further comprising: A distribution box (130), the distribution box (130) is connected between the power battery pack and each power consumption and charging equipment; A maintenance switch (131), the maintenance switch (131) is connected between the distribution box (130) and the power battery pack (10); a leakage sensor (132), the leakage sensor (132) is connected between the battery manager (70) and the distribution box (130); and A battery insurance (133), the battery insurance (133) is electrically connected to the power battery pack (10).

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