Simulation test device for endurance driving mileage of electric automobile

Abstract

The invention discloses an electric vehicle endurance driving mileage simulation test device, which belongs to the technical field of vehicle test, and comprises a motor and power module, which simulates the rotating speed and torque of a motor under different driving conditions according to a control signal; the battery pack module provides electric energy for the motor and power system simulation module and simulates the charging and discharging process of a battery pack; the vehicle load and environment module is used for simulating environments and load conditions under different driving conditions; the vehicle load and environment simulation module comprises a lifting platform and an environment bin; the control module receives test requirements, sets control signals of different driving conditions according to the test requirements, and controls the battery pack module, the motor and power module and the vehicle load and environment module to work according to the control signals; through cooperation of the modules, endurance mileage detection results under different environmental conditions are obtained, and the test results are closer to results under real road conditions.

Description

Technical Field

[0001] The invention relates to the technical field of automobile testing, and in particular to a device for simulating and testing the driving range of an electric vehicle. Background Art

[0002] Driving range refers to the maximum distance an electric vehicle can travel after being fully charged. The electric vehicle driving range simulation test device is a device used to simulate and test the driving range of electric vehicles under different working conditions. This test device can simulate the driving conditions of electric vehicles on actual roads to evaluate the energy consumption and driving range of electric vehicles. Including different driving behaviors, road conditions, ambient temperature, etc.

[0003] However, the existing electric vehicle range simulation test device is carried out under standardized conditions, which is different from actual road driving. As a result, the range test results under real road conditions such as uphill, downhill, and low temperature are missing, resulting in deviations between the test results and the real results under actual road conditions. Summary of the invention

[0004] In view of the above-mentioned prior art, the present invention provides an electric vehicle driving range simulation test device, which mainly solves the technical problems existing in the above-mentioned background technology.

[0005] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0006] An electric vehicle driving range simulation test device comprises: a motor and a power module, which simulates the motor speed and torque under different driving conditions according to the control signal;

[0007] The battery pack module provides power to the motor and power system simulation module and simulates the charging and discharging process of the battery pack;

[0008] The vehicle load and environment module is used to simulate the environment and load conditions under different driving conditions; the vehicle load and environment simulation module includes a lifting platform and an environmental chamber; the lifting platform is used to simulate the uphill and downhill driving environment of the electric vehicle, and the environmental chamber is used to simulate the driving environment under different weather conditions;

[0009] The control module receives the test requirements, sets control signals for different driving conditions according to the test requirements, and controls the battery pack module, the motor and power module, and the vehicle load and environment module to operate according to the control signals.

[0010] Optionally, the lifting platform includes a lifting support plate and a support seat, one side of the bottom of the lifting support plate is hinged to the support seat, and the other side of the bottom of the lifting support plate is provided with an adjustment mechanism, the adjustment mechanism includes a fixed seat arranged under the lifting support plate, a cavity is arranged in the fixed seat, a first motor is arranged on the inner wall of the fixed seat, the output shaft of the first motor is connected to a first bevel gear, the first bevel gear is meshed and connected to a second bevel gear, a sleeve is connected to the middle part of the second bevel gear, the upper end of the sleeve extends out of the fixed seat, the internal thread of the sleeve is connected to a screw, and the top of the screw is connected to the bottom of the lifting support plate.

[0011] Optionally, U-shaped baffles are respectively provided on both sides of the top of the lifting support plate.

[0012] Optionally, a guide shaft is connected to one side of the bottom of the lifting support plate, the upper end of the guide shaft is fixed to the bottom end of the lifting support plate through a nut, the lower end of the guide shaft is connected to the top of the support seat through a flange linear bearing, and the guide shaft is slidably connected to the flange linear bearing.

[0013] Optionally, the environmental chamber is arranged on the lifting platform, and an air supply mechanism is arranged in the environmental chamber, the air supply mechanism includes a circulating air duct, the circulating air duct is provided with multiple air supply ports and return air ports, the multiple air outlets are arranged at the top of the circulating air duct, the return air port is arranged at the bottom of the circulating air duct, a fan is arranged in the circulating air duct, and a driving mechanism is arranged on the outer wall of the environmental chamber, and the driving mechanism is connected to the fan.

[0014] Optionally, the driving mechanism includes a placement rack arranged on the outer wall of the environmental chamber, and a second motor, a driving wheel and a driven wheel are arranged on the placement rack, the output shaft of the second motor is connected to the rotating shaft of the driving wheel, the driving wheel and the driven wheel are connected by a belt, and the rotating shaft of the driven wheel is connected to the rotating shaft of the fan.

[0015] Optionally, two groups of the air supply mechanism are provided, which are respectively arranged at the front and rear sides of the environmental chamber, and two driven wheels are provided, and the rotating shafts of the two driven wheels are respectively connected to the fan rotating shafts of the two groups of air supply mechanisms.

[0016] Optionally, there are three air supply outlets, which are respectively arranged on both sides and in the middle of the circulating air duct.

[0017] Optionally, a refrigerator and a light are also provided in the environmental chamber, and the light is provided on one side of the environmental chamber.

[0018] The beneficial effects of the present invention are as follows: after receiving the control signal through the control module, the motor and the power module are controlled to drive the electric vehicle to move at the corresponding motor speed and torque. At the same time, the battery pack module supplies power to the electric vehicle, and controls the lifting platform and the environmental chamber to simulate different environmental conditions to obtain the cruising range test results under different environmental conditions, so that the test results are closer to the results under real road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an electric vehicle driving range simulation test device in an embodiment of the present invention;

[0020] Figure 2 is a top view of the air supply mechanism in an embodiment of the present invention;

[0021] Figure 3 A side view of the connection between the driving wheel and the driven wheel in an embodiment of the present invention;

[0022] Description of Figure Numbers:

[0023] 1. Lifting platform; 11. Lifting support plate; 12. Support seat; 13. U-shaped baffle;

[0024] 21. fixed seat; 22. cavity; 23. first motor; 24. first bevel gear; 25. second bevel gear; 26. sleeve; 27. screw; 28. guide shaft; 29. ​​flange linear bearing;

[0025] 3. Environmental warehouse;

[0026] 41. Circulation air duct; 42. Air supply outlet; 43. Air return outlet; 44. Fan;

[0027] 51. Placement rack; 52. Second motor; 53. Driving wheel; 54. Driven wheel; 55. Belt;

[0028] 6. Turn on the light. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0030] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0031] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments proposed herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and the scope of the present invention will be fully conveyed to those skilled in the art. And the purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms of "one", "one" and "said / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "compose" and / or "include" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0032] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] In order to fully understand the present invention, a detailed structure will be proposed in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail as follows, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0034] Example

[0035] The present application provides an electric vehicle driving range simulation test device, comprising: a motor and a power module, which provide a power source for the electric vehicle under different driving conditions according to a control signal, and specifically can control the motor speed and torque of the electric vehicle according to the control signal, thereby driving the electric vehicle to move;

[0036] The battery pack module provides power to the motor and power system simulation module and simulates the charging and discharging process of the battery pack;

[0037] The vehicle load and environment module is used to simulate the environment and load conditions under different driving conditions; the vehicle load and environment simulation module includes a lifting platform 1 and an environmental chamber 3; the lifting platform 1 is used to simulate the uphill and downhill driving environment of the electric vehicle, and the environmental chamber 3 is used to simulate the driving environment under different weather conditions;

[0038] The control module receives the test requirements and sets the control signals for different driving conditions according to the test requirements, and controls the battery pack simulation module, the motor and power system simulation module, and the vehicle load and environment simulation module according to the control signals.

[0039] The existing electric vehicle driving range simulation test device usually places the vehicle on a dynamometer. After the electric vehicle is fully charged through a charging pile, the environmental chamber 3 is set at a normal temperature of 23°C, the operating curve is started, and the driver controls the vehicle to run at the operating speed. During this process, the current, voltage, speed, battery remaining power and other data are collected in real time until the power is consumed, and the actual driving range of the vehicle is calculated;

[0040] However, most dynamometers are placed horizontally, and in real driving environments, there are uphill and downhill situations, which leads to a deviation between the measured mileage and the actual mileage. Please refer to the attached Figure 1 In the present invention, a lifting platform 1 is provided, on which a dynamometer is provided, and the dynamometer is coaxially connected to the motor of the electric vehicle; the lifting platform 1 specifically includes a lifting support plate 11 and a support seat 12, one side of the bottom of the lifting support plate 11 is hinged to the support seat 12, and the other side of the bottom of the lifting support plate 11 is provided with an adjustment mechanism, the adjustment mechanism includes a fixed seat 21 arranged below the lifting support plate 11, a cavity 22 is arranged in the fixed seat 21, a first motor 23 is arranged on the inner wall of the fixed seat 21, the output shaft of the first motor 23 is connected to a first bevel gear 24, the first bevel gear 24 is meshedly connected to a second bevel gear 25, a sleeve 26 is connected to the middle part of the second bevel gear 25, the upper end of the sleeve 26 extends out of the fixed seat 21, the internal thread of the sleeve 26 is connected to a screw 27, and the top of the screw 27 is connected to the bottom of the lifting support plate 11;

[0041] Specifically, when the control motor rotates, the motor drives the first bevel gear 24 to rotate, and then drives the second bevel gear 25 meshing with the first bevel gear 24 to rotate. Since the middle part of the second bevel gear 25 is fixedly connected to the sleeve 26, the rotation of the second bevel gear 25 drives the sleeve 26 to rotate. Since the sleeve 26 is threadedly connected to the screw 27, during the rotation of the sleeve 26, the screw 27 can move in the direction of screwing out of the sleeve 26 or screwing into the sleeve 26, thereby driving the movement of the lifting support plate 11 to adjust the inclination angle of the lifting support plate 11 relative to the lifting platform 1, thereby simulating the process of the electric vehicle going uphill or downhill, so that the measured cruising range can be closer to the actual road conditions;

[0042] As an optional embodiment, a guide shaft 28 is connected to one side of the bottom of the lifting support plate 11, the upper end of the guide shaft 28 is fixed to the bottom end of the lifting support plate 11 through a nut, and the lower end of the guide shaft 28 is connected to the top end of the support seat 12 through a flange linear bearing 29, and the guide shaft 28 is slidably connected to the flange linear bearing 29;

[0043] In order to make the lifting support plate 11 have better supporting force, when the control screw 27 is rotated in or out relative to the sleeve 26, that is, when the inclination angle of the lifting support plate 11 is changed, the guide shaft 28 can be synchronously driven to make linear motion in the vertical direction under the action of the flange linear bearing 29 to enhance the supporting force of the lifting support plate 11.

[0044] As an optional implementation, U-shaped baffles 13 are respectively provided on both sides of the top of the lifting support plate 11, so that when the electric vehicle is tested for range on the lifting support plate 11, the U-shaped baffles 13 can limit the tested electric vehicle.

[0045] As an optional implementation, the environmental chamber 3 is arranged on the lifting platform 1, and a blower 44 is arranged in the environmental chamber 3. The blower 44 can set the corresponding wind speed according to the set working conditions, and supply air to the environmental chamber 3 to simulate the real wind speed conditions;

[0046] Please refer to the attached Figure 2 and attached Figure 3 The blower 44 includes a circulating air duct 41, and the circulating air duct 41 is provided with three air supply ports 42 and one return air port 43. The three air supply ports 42 are provided at the top of the circulating air duct 41, and the three air supply ports 42 are provided at both sides and the middle of the circulating air duct 41, respectively, and the return air port 43 is provided at the bottom of the circulating air duct 41. A blower 44 is provided in the circulating air duct 41, and a driving mechanism is provided on the outer wall of the environmental chamber 3, and the driving mechanism is connected to the blower 44;

[0047] Through the action of the driving mechanism, the driving mechanism drives the fan 44 to rotate, and the air outlet of the fan 44 is connected to the air inlet of the circulating air duct 41, so that the fan 44 supplies air to the circulating air duct 41, and then supplies air to the interior of the environmental chamber 3 through the three air supply ports 42 on the circulating air duct 41, and then returns the air through the return air port 43 at the bottom of the circulating air duct 41, thereby continuously circulating.

[0048] In real road conditions, when there is wind, the car is mainly affected by the wind in front, and the middle and rear of the car are also affected by the wind. Therefore, by arranging air outlets 42 on both sides and the middle of the circulating air duct 41, it is possible to simulate the wind coming from the front, middle and rear sides of the electric car during driving.

[0049] There is a close relationship between wind speed and wind resistance. When an electric vehicle is traveling in the wind, the wind will exert a resistance on the object, which is the wind resistance. The greater the wind speed, the greater the impact of the wind on the electric vehicle, and thus the greater the wind resistance. Wind resistance is an important component of the energy consumption of electric vehicles. The greater the wind resistance, the more electricity will be consumed. Therefore, simulating air supply through the blower 44 can better simulate the real environment.

[0050] The driving mechanism drives the fan 44 to rotate, thereby supplying air to the circulating air duct 41, and discharging air from the three air outlets 42. At the same time, the air outlet 42 closest to the fan 44 has the largest air output, and the air outlet 42 with the largest air output is located above the front of the electric vehicle. The air outlet 42 farthest from the fan 44 has the smallest air output, and the air outlet 42 with the smallest air output is located above the parking space of the electric vehicle. This setting can simulate the wind conditions under real road conditions as much as possible, so as to obtain a range test result that is closer to the real situation.

[0051] Two groups of blowers 44 are provided, which are respectively provided at the front and rear sides of the environment chamber 3; the driving mechanism includes a placement frame 51 provided on the outer wall of the environment chamber 3, on which a second motor 52, a driving wheel 53 and two driven wheels 54 are provided, the output shaft of the second motor 52 is connected to the rotating shaft of the driving wheel 53, the driving wheel 53 and the driven wheel 54 are connected by a belt 55, and the rotating shafts of the two driven wheels 54 are respectively connected to the rotating shafts of the blowers 44 of the two groups of blowers 44;

[0052] By controlling the rotation of the second motor 52, the second motor 52 drives the driving wheel 53 to rotate, thereby driving the belt 55 to transmit, and then driving the rotation of the two driven wheels 54 connected to the belt 55, and at the same time driving the rotating shaft of the fan 44 to rotate, so that the fan 44 continuously absorbs external air, and the air outlet of the fan 44 is connected to the air inlet of the circulating air duct 41, so as to supply air to the circulating air duct 41, and supply air to the electric vehicle for the range detection through the air supply port 42 on the circulating air duct 41;

[0053] As an optional implementation, a refrigerator and a light are also provided in the environmental chamber 3, and the light is provided on one side of the environmental chamber 3;

[0054] The wind speed will affect the cruising range of the electric vehicle. The greater the wind speed, the lower the ambient temperature will tend to be. The lower ambient temperature will lead to a lower battery temperature, which will consume more power and reduce the cruising range. Therefore, in the environmental chamber 3, the ambient temperature can be set by a refrigerator, and the electric vehicle can be left standing for a period of time. The specific time can be set according to the temperature and actual needs. After a period of time, the cruising range is tested to simulate the temperature environment to obtain a more realistic cruising range test result.

[0055] You can also set the temperature and wind speed at the same time to simulate a cold and windy environment. In this environment, the battery temperature will drop further, and the range will be reduced accordingly due to the influence of wind resistance. Finally, the range under this condition is measured.

[0056] By setting the lights, you can simulate driving in a night environment. You can adjust the brightness of the lights according to the situation to simulate driving under the brightness of street lights on the highway, or simulate driving under the brightness of street lights in a dim environment on a country road, so as to obtain more mileage test results in different scenarios;

[0057] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A driving range simulation test device for electric vehicles, characterized in that: include: The motor and power module simulates the motor speed and torque under different driving conditions according to the control signal; The battery pack module provides power to the motor and power system simulation module and simulates the charging and discharging process of the battery pack; A vehicle load and environment module is used to simulate the environment and load conditions under different driving conditions; the vehicle load and environment simulation module comprises a lifting platform (1) and an environment chamber (3); the lifting platform (1) is used to simulate the uphill and downhill driving environment of the electric vehicle, and the environment chamber (3) is used to simulate the driving environment under different weather conditions; The control module receives the test requirements, sets control signals for different driving conditions according to the test requirements, and controls the battery pack module, the motor and power module, and the vehicle load and environment module to operate according to the control signals.

2. The electric vehicle driving range simulation test device according to claim 1, characterized in that: The lifting platform (1) comprises a lifting support plate (11) and a support seat (12); one side of the bottom of the lifting support plate (11) is hinged to the support seat (12); the other side of the bottom of the lifting support plate (11) is provided with an adjustment mechanism; the adjustment mechanism comprises a fixed seat (21) arranged below the lifting support plate (11); a cavity (22) is arranged in the fixed seat (21); a first motor (23) is arranged on the inner wall of the fixed seat (21); an output shaft of the first motor (23) is connected to a first bevel gear (24); the first bevel gear (24) is meshedly connected to a second bevel gear (25); a sleeve (26) is connected to the middle of the second bevel gear (25); the upper end of the sleeve (26) extends out of the fixed seat (21); the internal thread of the sleeve (26) is connected to a screw rod (27); the top of the screw rod (27) is connected to the bottom of the lifting support plate (11).

3. The electric vehicle driving range simulation test device according to claim 2, characterized in that: U-shaped baffles (13) are respectively arranged on both sides of the top of the lifting support plate (11).

4. The electric vehicle driving range simulation test device according to claim 2, characterized in that: A guide shaft (28) is connected to one side of the bottom of the lifting support plate (11); the upper end of the guide shaft (28) is fixed to the bottom end of the lifting support plate (11) through a nut; the lower end of the guide shaft (28) is connected to the top end of the support seat (12) through a flange linear bearing (29); and the guide shaft (28) and the flange linear bearing (29) are slidably connected.

5. The electric vehicle driving range simulation test device according to claim 1, characterized in that: The environmental chamber (3) is arranged on the lifting platform (1), and a blower (44) structure is arranged in the environmental chamber (3), and the blower (44) structure includes a circulating air duct (41), and the circulating air duct (41) is provided with a plurality of air supply ports (42) and a return air port (43), and the plurality of air outlets are arranged at the top of the circulating air duct (41), and the return air port (43) is arranged at the bottom of the circulating air duct (41), and a blower (44) is arranged in the circulating air duct (41), and a driving mechanism is arranged on the outer wall of the environmental chamber (3), and the driving mechanism is connected to the blower (44).

6. The electric vehicle driving range simulation test device according to claim 5, characterized in that: The driving mechanism comprises a placement frame (51) arranged on the outer wall of the environmental chamber (3); a second motor (52), a driving wheel (53) and a driven wheel (54) are arranged on the placement frame (51); an output shaft of the second motor (52) is connected to a rotating shaft of the driving wheel (53); the driving wheel (53) and the driven wheel (54) are connected via a belt (55); and the rotating shaft of the driven wheel (54) is connected to a rotating shaft of the fan (44).

7. The electric vehicle driving range simulation test device according to claim 6, characterized in that: The air supply fan (44) mechanism is provided with two groups, which are respectively arranged at the front side and the rear side of the environmental chamber (3); the driven wheels (54) are provided with two groups, and the rotating shafts of the two driven wheels (54) are respectively connected to the rotating shafts of the fans (44) of the two groups of air supply fan (44) mechanisms.

8. The electric vehicle driving range simulation test device according to claim 5, characterized in that: There are three air supply ports (42), and the three air supply ports (42) are respectively arranged on both sides and the middle of the circulating air duct (41).

9. The electric vehicle driving range simulation test device according to claim 1, characterized in that: A refrigerator and a lighting device are also provided in the environmental chamber (3), and the lighting device is provided on one side of the environmental chamber (3).

Images