A voltage parameter detection device of a new energy vehicle motor driver and a detection method thereof

Abstract

This invention discloses a voltage parameter detection device for a new energy vehicle motor driver, comprising a bell housing, a temperature control mechanism, a motor, a power battery, a motor driver, and a fixing and positioning device. The fixing and positioning device includes a base plate, a plug-in plate, an automatic telescopic pressurizing mechanism, and a connector. The inner wall of the plug-in plate has a first movable part and a second movable part along the height direction. The automatic telescopic pressurizing mechanism includes a support rod, a rotating telescopic rod, and a pressure plate. The connector is fixed to the pressure plate, and a magnetic block is provided on the surface of the connector. This detection device can detect the input and output voltages of the motor driver at different speeds under extreme low to extreme high temperatures, and can also detect the input and output voltages of the motor driver at different speeds with different amounts of charge stored in the power battery. Considering the influencing factors of the motor driver driving the motor under various conditions, it verifies the rationality of the motor driver voltage parameters under different conditions, thus improving the accuracy of voltage detection.

Description

Technical Field

[0001] This invention relates to the field of motor control technology, and in particular to a voltage parameter detection device for a new energy vehicle motor driver. Background Technology

[0002] System variables of the motor driver, such as the input voltage and output voltage of the motor driver, are used to control the motor speed and direction. The sampling accuracy of the above system variables will directly affect the speed control accuracy or torque monitoring accuracy of the motor driver.

[0003] Currently, sampling methods for the input and output voltages of motor drivers suffer from inaccurate positioning or poor connection, potentially leading to common-cause failures. This results in the inability to perform reasonableness verification on the sampled variables, or inaccurate reasonableness verification, ultimately causing inaccurate voltage testing of the motor driver. Furthermore, existing technologies typically involve directly powering on the controller before connecting it to the test motor, a cumbersome process, particularly time-consuming disassembly and assembly, leading to low testing efficiency. Additionally, the motor driver is directly connected to the motor, and vibrations during motor operation can cause unstable connection at the test sampling signal point. Moreover, temperature variations and the actual charge stored in the power battery both affect the testing of the motor driver.

[0004] In view of this, it is necessary to improve the voltage parameter detection device of the motor driver in the prior art. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a voltage parameter detection device and detection method for a new energy vehicle motor driver.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a voltage parameter detection device for a new energy vehicle motor driver, characterized in that it includes: a bell jar, and a temperature control mechanism, a motor, a power battery, a motor driver, and a fixing and positioning device disposed inside the bell jar; the power battery is electrically connected to the motor and supplies power to the motor; the motor driver is connected to the motor; and the surface of the motor driver is provided with a plurality of wiring holes;

[0007] The temperature control mechanism simulates the temperature environment of the motor driver and the motor under operation by increasing or decreasing the temperature inside the bell jar; the power battery is connected to a battery capacity testing instrument.

[0008] The fixing and positioning device includes a base plate, a plug-in plate, an automatic telescopic pressurizing mechanism, and a connector. The plug-in plate has a concave cross-section, and its inner wall is provided with a first movable part and a second movable part along the height direction to adjust the gap between the motor driver and the plug-in plate. The automatic telescopic pressurizing mechanism is fixed to one side surface of the base plate and includes a support rod, a rotating telescopic rod, and a pressure plate. The connector is fixed to the pressure plate, and a magnetic block is provided on the surface of the connector for attracting the contacts of external wiring.

[0009] In a preferred embodiment of the present invention, the temperature control mechanism includes a heating device, a heat dissipation device, a temperature monitoring device, and a temperature control system to ensure that the temperature control setting is between -15℃ and 45℃.

[0010] In a preferred embodiment of the present invention, the battery capacity testing instrument accurately measures the power battery, including cold start voltage, no-load voltage to full-load voltage; or the voltage of the power battery under different storage capacities.

[0011] In a preferred embodiment of the present invention, the rotating telescopic rod is capable of vertical and circumferential movement to drive the rotation and vertical movement of the pressure plate.

[0012] In a preferred embodiment of the present invention, the plug-in plates are symmetrically arranged, and the bottom of the plug-in plates is provided with a protrusion that is fixed to the base plate, so as to ensure that the motor driver is fixed in the center position of the fixing and positioning device.

[0013] In a preferred embodiment of the present invention, the inner wall side of the plug plate is further provided with a vibration damping plate to attenuate the vibration effect of the motor rotation.

[0014] In a preferred embodiment of the present invention, the motor driver is further connected to an ECU, which controls the ECU and issues commands to make the motor output different speeds.

[0015] In a preferred embodiment of the present invention, the first movable part and the second movable part automatically lock the motor driver through a built-in push rod, and the push rod can automatically reset.

[0016] The present invention also provides a detection method for a voltage parameter detection device for a new energy vehicle motor driver, comprising: selecting several values ​​including extreme low temperature to extreme high temperature; controlling the temperature inside the bell jar to reach a predetermined value; and the ECU issuing a command to make the motor output different speeds to ensure that the voltage parameter values ​​of the motor driver input and output at all motor speeds under the predetermined value are detected.

[0017] In a preferred embodiment of the present invention, a detection method for a voltage parameter detection device for a new energy vehicle motor driver further includes: selecting voltage values ​​at different charge levels stored in the power battery, or selecting the power battery from no load to full load, with the temperature control mechanism controlling the temperature inside the bell jar to remain basically constant and within the range of -15℃ to 45℃; and the ECU issuing a command to cause the motor to output different speeds, ensuring that the voltage parameter values ​​of the motor driver input and output at all motor speeds under a predetermined value are detected.

[0018] This invention addresses the shortcomings of the prior art and has the following beneficial effects:

[0019] (1) The present invention provides a voltage parameter detection device for a new energy vehicle motor driver. The detection device can detect the input and output voltage of the motor driver at different speeds under extreme low temperature to extreme high temperature, and can also detect the input and output voltage of the motor driver at different speeds under different power battery storage. Considering the influence factors of the motor driver driving the motor under various conditions, the device verifies the rationality of the motor driver voltage parameters under different conditions and improves the accuracy of voltage detection.

[0020] (2) The present invention adjusts the gap between the first and second movable parts in the fixed positioning device and realizes the positioning and stabilization of the motor driver. The damping plate attenuates the vibration of the motor rotation and provides stability for the test of the controller.

[0021] (3) When testing the motor driver of the present invention, the tester does not need to move and adjust frequently. He only needs to install the motor driver on the plug-in plate and fix it on the base plate. The motor driver automatically completes the positioning and contact connection, which reduces the labor intensity.

[0022] (4) The automatic telescopic pressurization mechanism of the present invention adjusts the height and realizes pressurization. A magnetic block is provided on the surface of the terminal block to attract the contact of the external wiring. When the pressure plate is applied, the contact of the external wiring and the wiring hole can be stably connected, which improves the test accuracy. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the voltage parameter detection structure according to a preferred embodiment of the present invention;

[0025] Figure 2This is a perspective view of a motor driver according to a preferred embodiment of the present invention;

[0026] Figure 3 This is a perspective view of a motor driver according to a preferred embodiment of the present invention;

[0027] Figure 4 This is a perspective structural diagram of the automatic telescopic pressurization mechanism according to a preferred embodiment of the present invention;

[0028] In the figure: 1. Fixed positioning device; 11. Base plate; 12. Plug-in plate; 121. First movable part; 122. Second movable part; 13. Automatic telescopic pressurization mechanism; 131. Support rod; 132. Rotary telescopic rod; 133. Pressure plate; 14. Wiring head; 141. Magnetic block; 2. Motor driver; 21. Wiring hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] like Figure 1 The diagram shows a structural schematic of a voltage parameter detection device for a new energy vehicle motor driver 2. The voltage parameter detection device includes: a bell housing, a temperature control mechanism inside the bell housing, a motor, a power battery, a motor driver 2, and a fixing and positioning device 1. The power battery is electrically connected to the motor and supplies power to it. The motor driver 2 is connected to the motor. Several wiring holes 21 are provided on the surface of the motor driver 2. The temperature control mechanism simulates the temperature environment of the motor driver 2 and the motor under operation by increasing or decreasing the temperature inside the bell housing. The temperature control mechanism includes a heating device, a heat dissipation device, a temperature monitoring device, and a temperature control system to ensure that the temperature control setting is between -15℃ and 45℃. The power battery is connected to a battery capacity testing instrument. This detection device can detect the input and output voltages of the motor driver 2 at different speeds under extreme low to extreme high temperatures. It can also detect the input and output voltages of the motor driver 2 at different speeds when the power battery stores different amounts of charge. Considering the influencing factors of the motor driver 2 driving the motor under various conditions, the device verifies the rationality of the voltage parameters of the motor driver 2 under different conditions, improving the accuracy of the detected voltage.

[0034] like Figure 2 and Figure 3 As shown, the fixing and positioning device 1 includes a base plate 11, a plug-in plate 12, an automatic telescopic pressurizing mechanism 13, and a connector 14. The plug-in plate 12 has a concave cross-section. The inner wall of the plug-in plate 12 is provided with a first movable part 121 and a second movable part 122 along the height direction to adjust the gap between the motor driver 2 and the plug-in plate 12. The first movable part 121 and the second movable part 122 automatically engage the motor driver 2 via a built-in push rod, which can automatically reset. The plug-in plate 12 is symmetrically arranged, and the bottom of the plug-in plate 12 has a protrusion fixed to the base plate 11, ensuring that the motor driver 2 is fixed in the center position of the fixing and positioning device 1. When the motor driver 2 is placed inside the plug-in plate 12, the second movable part 122 first engages the motor driver 2, ensuring that the motor driver 2 is in the center position; the first movable part 121 moves and extends to engage the upper surface of the motor driver 2, thereby fixing the side and upper surface of the motor driver 2. The first movable part 121 and the second movable part 122 are driven by a built-in motor.

[0035] The inner wall side of the plug plate 12 of the present invention is also provided with a vibration damping plate to attenuate the vibration effect of the motor rotation.

[0036] like Figure 4 As shown, the automatic telescopic pressurizing mechanism 13 of the present invention is fixed to the side surface of a base plate 11. The automatic telescopic pressurizing mechanism 13 includes a support rod 131, a rotating telescopic rod 132, and a pressure plate 133. A terminal 14 is fixed to the pressure plate 133, and a magnetic block 141 is provided on the surface of the terminal 14 for attracting the contact of the external wiring. The rotating telescopic rod 132 can achieve vertical and circumferential movement to drive the rotation and vertical movement of the pressure plate 133. The automatic telescopic pressurizing mechanism 13 of the present invention adjusts the height and achieves pressurization. The magnetic block 141 on the surface of the terminal 14 is used to attract the contact of the external wiring. When the pressure plate 133 is pressed, the contact of the external wiring and the wiring hole 21 can be stably engaged, improving the test accuracy.

[0037] Battery capacity testing instruments accurately measure the voltage of power batteries, including cold start voltage, no-load voltage to full-load voltage; or the voltage of power batteries at different storage capacities.

[0038] The motor driver 2 is also connected to an ECU. By controlling the ECU and issuing commands, the motor can output different speeds.

[0039] During testing of the motor driver 2 of the present invention, the tester does not need to move and adjust frequently. He only needs to install the motor driver 2 on the plug-in plate 12 and fix it on the base plate 11. The motor driver 2 automatically completes the positioning and contact connection, which reduces the labor intensity.

[0040] The present invention also provides a detection method for a voltage parameter detection device for a new energy vehicle motor driver 2, comprising: selecting several values ​​including extreme low temperature to extreme high temperature, and controlling the temperature inside the bell jar to reach a predetermined value; the ECU issuing a command to make the motor output different speeds, ensuring that the voltage parameter values ​​of the input and output of the motor driver 2 at all motor speeds under the predetermined value are detected.

[0041] A detection method for a voltage parameter detection device for a new energy vehicle motor driver 2 further includes: selecting voltage values ​​under different charge levels stored in the power battery, or selecting the power battery from no load to full load, with the temperature control mechanism controlling the temperature inside the bell jar to remain basically constant and within -15℃ to 45℃; the ECU then issues a command to make the motor output different speeds, ensuring that the voltage parameter values ​​of the input and output of the motor driver 2 at all motor speeds under the predetermined value are detected.

[0042] Based on the preferred embodiments of the present invention described above, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A voltage parameter detection device for a new energy vehicle motor driver, characterized in that, include: The bell jar, and a temperature control mechanism, motor, power battery, motor driver, and fixing and positioning device installed inside the bell jar; the power battery is electrically connected to the motor and supplies power to the motor; the motor driver is connected to the motor; the surface of the motor driver is provided with several wiring holes; The temperature control mechanism simulates the temperature environment of the motor driver and the motor under operation by increasing or decreasing the temperature inside the bell jar; the power battery is connected to a battery capacity testing instrument. The fixing and positioning device includes a base plate, a plug-in plate, an automatic telescopic pressurizing mechanism, and a connector. The plug-in plate has a concave cross-section, and its inner wall is provided with a first movable part and a second movable part along the height direction to adjust the gap between the motor driver and the plug-in plate. The automatic telescopic pressurizing mechanism is fixed to the side surface of one side of the base plate and includes a support rod, a rotating telescopic rod, and a pressure plate. The connector is fixed to the pressure plate, and a magnetic block is provided on the surface of the connector for attracting the contacts of external wiring. The temperature control mechanism includes a heating device, a heat dissipation device, a temperature monitoring device, and a temperature control system to ensure that the temperature control setting is between -15℃ and 45℃. The battery capacity testing instrument accurately measures the power battery, including cold start voltage, no-load voltage to full-load voltage; or the voltage of the power battery under different stored charge levels. The rotating telescopic rod can move in the vertical and circumferential directions to drive the rotation and vertical movement of the pressure plate; The plug-in plates are symmetrically arranged, and the bottom of the plug-in plates is provided with protrusions that are fixed to the base plate, so as to ensure that the motor driver is fixed in the center position of the fixing and positioning device; The inner wall of the plug plate is also provided with vibration damping pads to attenuate the vibration effects of the motor rotation.

2. The voltage parameter detection device for a new energy vehicle motor driver according to claim 1, characterized in that: The motor driver is also connected to an ECU, which controls the ECU and issues commands to make the motor output different speeds.

3. The voltage parameter detection device for a new energy vehicle motor driver according to claim 1, characterized in that: The first and second movable parts automatically engage the motor driver via a built-in push rod, which can automatically reset.

4. A detection method for a voltage parameter detection device for a new energy vehicle motor driver according to any one of claims 1-3, characterized in that, include: Select several values ​​ranging from extreme low temperature to extreme high temperature, and the temperature control mechanism controls the temperature inside the bell jar to reach the predetermined value; The ECU then issues commands to make the motor output different speeds, ensuring that the input and output voltage parameter values ​​of the motor driver are detected at all motor speeds under the predetermined value.

5. The detection method of the voltage parameter detection device of the new energy vehicle motor driver according to claim 4, characterized in that, Also includes: Select voltage values ​​for different charge levels of the power battery, or select power battery from no load to full load, and the temperature control mechanism keeps the temperature inside the bell jar basically constant, ranging from -15℃ to 45℃. The ECU then issues commands to make the motor output different speeds, ensuring that the input and output voltage parameter values ​​of the motor driver are detected at all motor speeds under the predetermined value.

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