Driving device, motor controller and vehicle

Abstract

The invention relates to a driving device, a motor controller and a vehicle. The driving device comprises a high-voltage sampling circuit, a high-voltage protection circuit and a control circuit, wherein the high-voltage sampling circuit comprises a sampling module and a voltage dividing module, the voltage dividing module comprises at least two voltage dividing units, each voltage dividing unit is connected with the power supply circuit and the sampling module, at least one voltage dividing unit is connected with the control circuit, and the sampling module is connected with the control circuit. The sampling module is used for sampling the power supply voltage output by the power supply circuit after the power supply voltage is divided by the voltage dividing module, and outputting a sampling signal; the control circuit is used for outputting a control signal to the voltage division units according to the sampling signal so as to control the parallel connection state of each voltage division unit; the high-voltage protection circuit is connected with the control circuit, the high-voltage protection circuit is used for being connected with the power supply circuit and the power conversion circuit, and the control circuit is further used for outputting a control signal to the high-voltage protection circuit so as to control the working state of the high-voltage protection assembly. According to the driving device, the development cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a drive device, a motor controller and a vehicle. Background Art

[0002] With the development of science and technology, new energy vehicles have gradually entered people's daily production and life.

[0003] In the related technology, different models of new energy vehicles are often matched with different battery systems. Correspondingly, the motor controllers installed in new energy vehicles with different battery systems will also be different, especially the driver boards in the motor controllers will be different, which will lead to the need to design a variety of different motor controllers during the vehicle development phase, and set up a separate test platform for each type of motor controller, resulting in a large amount of manpower and material resources consumed, resulting in high development costs. Summary of the invention

[0004] Based on this, it is necessary to provide a drive device, a motor controller and a vehicle that can reduce development costs in response to the above technical problems.

[0005] In a first aspect, the present application provides a driving device, the driving device comprising: a high voltage sampling circuit, a high voltage protection circuit and a control circuit; wherein:

[0006] The high-voltage sampling circuit includes a sampling module and a voltage dividing module. The voltage dividing module includes at least two voltage dividing units. Each of the voltage dividing units is connected to the power supply circuit and the sampling module respectively, and at least one of the voltage dividing units is connected to the control circuit. The sampling module is connected to the control circuit. The sampling module is used to sample the voltage of the power supply voltage output by the power supply circuit after being divided by the voltage dividing module, and output a sampling signal; the control circuit is used to output a control signal to the voltage dividing unit according to the sampling signal, so as to control the parallel state of each of the voltage dividing units;

[0007] The high-voltage protection circuit is connected to the control circuit, and the high-voltage protection circuit is used to be connected to the power supply circuit and the power conversion circuit. The control circuit is also used to output the control signal to the high-voltage protection circuit to control the working state of the high-voltage protection component.

[0008] In one embodiment, the sampling module is used to sample the voltage of the first power supply voltage output by the power supply circuit after being divided by the voltage divider module, and output a first sampling signal, and to sample the voltage of the second power supply voltage output by the power supply circuit after being divided by the voltage divider module, and output a second sampling signal; wherein the first power supply voltage is greater than the second power supply voltage;

[0009] The control circuit is used to output a first control signal according to the first sampling signal, and output a second control signal according to the second sampling signal;

[0010] The voltage division module at least includes a first voltage division unit and a second voltage division unit;

[0011] The first voltage dividing unit is connected to the power supply circuit and the sampling module respectively, and the first voltage dividing unit is used to conduct a first path between the power supply circuit and the sampling module;

[0012] The second voltage divider unit is connected to the power supply circuit, the control circuit and the sampling module respectively. The second voltage divider unit is used to open the second path between the power supply circuit and the sampling module according to the second control signal so as to be connected in parallel with the first voltage divider unit. The second voltage divider unit is also used to disconnect the second path between the power supply circuit and the sampling module when receiving the first control signal.

[0013] In one of the embodiments, the first voltage dividing unit includes at least one first voltage dividing resistor;

[0014] The second voltage-dividing unit includes at least one second voltage-dividing resistor and a first optical coupler, wherein a first end of the first optical coupler is connected to the second voltage-dividing resistor, a second end of the first optical coupler is connected to the sampling module, a third end of the first optical coupler is connected to the control circuit, and a fourth end of the first optical coupler is grounded;

[0015] When the second voltage divider unit receives a second control signal, the first end and the second end of the first optical coupler are turned on; when the second voltage divider unit receives a first control signal, the first end and the second end of the first optical coupler are turned off.

[0016] In one embodiment, the sampling signal includes a voltage signal; and the sampling module includes:

[0017] A sampling resistor connected to each of the voltage dividing units;

[0018] a sampling unit, connected to the sampling resistor and the control circuit respectively, for sampling a voltage signal across the sampling resistor and outputting the voltage signal to the control circuit;

[0019] Wherein, the control circuit is used to control the parallel connection state of each of the voltage dividing units to control the voltage signal to be within a preset voltage range.

[0020] In one embodiment, the sampling module further includes:

[0021] A filtering unit is connected to the sampling resistor and the sampling unit respectively, and is used for filtering the voltage signal.

[0022] In one embodiment, the high-voltage protection circuit includes a plurality of protection modules connected in parallel, wherein the electrical parameters of the protection modules are different, and the number of the protection modules is greater than or equal to the number of the voltage dividing units;

[0023] The control circuit is connected to each of the protection modules respectively, and is further used to output the control signal to each of the protection units to control a target protection module in the protection module to conduct a path between the power supply circuit and the power conversion circuit.

[0024] In one of the embodiments, the protection module includes a second optical coupler, a protection unit and a third optical coupler;

[0025] The first end of the second optical coupler is connected to the power supply circuit, the second end of the second optical coupler is connected to the first end of the protection unit, the third end of the second optical coupler is connected to the control circuit, and the fourth end of the second optical coupler is grounded;

[0026] The first end of the third optical coupler is connected to the second end of the protection unit, the second end of the third optical coupler is connected to the power conversion circuit, the third end of the third optical coupler is connected to the control circuit, and the fourth end of the third optical coupler is grounded.

[0027] In one embodiment, the control signal further includes a third control signal and a fourth control signal; the high voltage protection circuit includes a first protection module and a second protection module;

[0028] The first protection module is connected to the control circuit and the power supply circuit respectively, and the second protection module is connected to the control circuit and the power supply circuit respectively;

[0029] Among them, when the control circuit outputs a third control signal, the first protection module is in a working state and the second protection module is in a non-working state; when the control circuit outputs a fourth control signal, the second protection module is in a working state and the first protection module is in a non-working state.

[0030] In a second aspect, the present application provides a motor controller, which includes a control board and any one of the driving devices described above.

[0031] In a third aspect, the present application provides a vehicle comprising a high-voltage battery pack and the above-mentioned motor controller.

[0032] The above-mentioned drive device, motor controller and vehicle include: a high-voltage sampling circuit, a high-voltage protection circuit and a control circuit; wherein the high-voltage sampling circuit includes a sampling module and a voltage dividing module, the voltage dividing module includes at least two voltage dividing units, each voltage dividing unit is respectively connected to the power supply circuit and the sampling module, and at least one voltage dividing unit is connected to the control circuit, the sampling module is connected to the control circuit, the high-voltage protection circuit is respectively connected to the control circuit, the power supply circuit and the power conversion circuit, the sampling module is used to sample the voltage of the power supply voltage output by the power supply circuit after being divided by the voltage dividing module, and output a sampling signal; the control circuit is used to output a control signal to the voltage dividing unit and the high-voltage protection circuit according to the sampling signal, so as to control the parallel state of each voltage dividing unit, and control the working state of the high-voltage protection component. The control circuit of the present application can control the state of the high-voltage sampling circuit and the high-voltage protection circuit according to the power supply voltage provided by the power supply circuit received by the drive device, so that the drive device of the present application matches the power supply voltage provided by the power supply circuit, therefore, the drive device of the present application can reduce the development cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a schematic structural diagram of a driving device in one embodiment;

[0035] Figure 2 is a schematic structural diagram of a driving device in another embodiment;

[0036] Figure 3 A schematic diagram of the structure of a driving device in yet another embodiment;

[0037] Figure 4 is a schematic structural diagram of a driving device in yet another embodiment;

[0038] Figure 5 FIG. 4 is a schematic diagram of the structure of a driving device in yet another embodiment. DETAILED DESCRIPTION

[0039] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0041] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0042] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0043] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0044] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0045] In the related art, the motor control assembly of new energy vehicles usually has multiple voltages, and two different motor controllers need to be developed for different voltage platforms. For example, the A model is matched with a 400V high-voltage battery system, and the B model is matched with an 800V high-voltage battery system. Therefore, for different high-voltage battery systems, it is necessary to design a variety of different motor controllers. Usually, the motor controller consists of a control board and a driver board. Different voltage platforms have little effect on the control board, and the same platform can be used for development. However, for the driver board part, its high-voltage sampling circuit and high-voltage protection circuit have different device requirements, so different driver boards need to be developed. Correspondingly, it is also necessary to design multiple test platforms for various motor controllers.

[0046] In an exemplary embodiment, see Figure 1 The present application provides a driving device, which includes: a high-voltage sampling circuit 1, a high-voltage protection circuit 2 and a control circuit 3.

[0047] The high-voltage sampling circuit 1 includes a sampling module 11 and a voltage dividing module 12. The voltage dividing module 12 includes at least two voltage dividing units 120. Each voltage dividing unit 120 is connected to the power supply circuit 4 and the sampling module, respectively, and at least one voltage dividing unit 120 is connected to the control circuit 3. The sampling module 11 is connected to the control circuit 3. The sampling module 11 is used to sample the voltage of the power supply voltage output by the power supply circuit 4 after being divided by the voltage dividing module 12, and output a sampling signal. The control circuit 3 is used to output a control signal to the voltage dividing unit 120 according to the sampling signal to control the parallel state of each voltage dividing unit 120. The high-voltage protection circuit 2 is connected to the control circuit 3. The high-voltage protection circuit 2 is used to be connected to the power supply circuit 4 and the power conversion circuit 5. The control circuit 3 is also used to output a control signal to the high-voltage protection circuit 2 to control the working state of the high-voltage protection component 2.

[0048] It can be understood that the driving device of the present application is equivalent to the driving board in the motor controller, wherein the high-voltage sampling circuit 1 can receive the supply voltage output by the power supply circuit 4, divide the supply voltage through the voltage divider module 12, and sample the voltage after the voltage divider and then send the sampling signal to the control circuit 3. After receiving the sampling signal, the control circuit 3 can judge whether the current working state of the high-voltage sampling circuit 1 and the working state of the high-voltage protection component 2 match the supply voltage output by the power supply circuit 4 according to the sampling signal. If the working state of the high-voltage sampling circuit 1 does not match the supply voltage output by the power supply circuit 4, since the voltage divider module 12 includes a plurality of voltage divider units 120, the control circuit 3 can output a control signal to the voltage divider unit 120 therein to adjust the parallel state of each voltage divider unit 120, so that the working state of the high-voltage sampling circuit 1 matches the supply voltage output by the power supply circuit 4; similarly, if the working state of the high-voltage protection component 2 does not match the supply voltage output by the power supply circuit 4, the control circuit 3 can output a control signal to the high-voltage protection circuit 2 to control the working state of the high-voltage protection component 2, so that the working state of the high-voltage protection circuit 2 matches the supply voltage output by the power supply circuit 4.

[0049] The above-mentioned driving device includes a high-voltage sampling circuit, a high-voltage protection circuit and a control circuit; wherein the high-voltage sampling circuit includes a sampling module and a voltage dividing module, the voltage dividing module includes at least two voltage dividing units, each voltage dividing unit is respectively connected to the power supply circuit and the sampling module, and at least one voltage dividing unit is connected to the control circuit, the sampling module is connected to the control circuit, the high-voltage protection circuit is respectively connected to the control circuit, the power supply circuit and the power conversion circuit, the sampling module is used to sample the voltage of the power supply voltage output by the power supply circuit after being divided by the voltage dividing module, and output a sampling signal; the control circuit is used to output a control signal to the voltage dividing unit and the high-voltage protection circuit according to the sampling signal, so as to control the parallel state of each voltage dividing unit, and control the working state of the high-voltage protection component. The control circuit of the present application can control the state of the high-voltage sampling circuit and the high-voltage protection circuit according to the power supply voltage provided by the power supply circuit received by the driving device, so that the driving device of the present application matches the power supply voltage provided by the power supply circuit, therefore, the driving device of the present application can reduce the development cost.

[0050] In an exemplary embodiment, the sampling module 11 is used to sample the voltage of the first power supply voltage output by the power supply circuit 4 after being divided by the voltage divider module 12, and output a first sampling signal, and to sample the voltage of the second power supply voltage output by the power supply circuit 4 after being divided by the voltage divider module 12, and output a second sampling signal; wherein the first power supply voltage is greater than the second power supply voltage. The control circuit 3 is used to output a first control signal according to the first sampling signal, and output a second control signal according to the second sampling signal.

[0051] See also Figure 2, the voltage dividing module 12 at least includes a first voltage dividing unit 121 and a second voltage dividing unit 122;

[0052] The first voltage dividing unit 121 is connected to the power supply circuit 4 and the sampling module 11 respectively, and the first voltage dividing unit 121 is used to conduct a first path between the power supply circuit 4 and the sampling module 11;

[0053] The second voltage divider unit 122 is connected to the power supply circuit 4, the control circuit 3 and the sampling module 11 respectively. The second voltage divider unit 122 is used to turn on the second path between the power supply circuit 4 and the sampling module 11 according to the second control signal so as to be connected in parallel with the first voltage divider unit 121; the second voltage divider unit 122 is also used to disconnect the second path between the power supply circuit 4 and the sampling module 11 when receiving the first control signal.

[0054] In application, since the driving device of the present application can automatically match the power supply voltage output by the power supply circuit 4, that is, only one test platform can be designed for the driving device of the present application, and the test platform can apply voltages of different amplitudes to the driving device of the present application. In one example, the power supply circuit 4 in the test platform can output a first power supply voltage and a second power supply voltage, and under normal conditions, the control circuit 3 controls the second voltage divider unit 122 to be disconnected, wherein the first power supply voltage is greater than the second power supply voltage, and illustratively, the first power supply voltage is 800V and the second power supply voltage is 400V. When the power supply circuit 4 outputs the first power supply voltage, the sampling module 11 samples the voltage divided by the voltage divider module 12, and outputs the first sampling signal to the control circuit 2, and the control circuit 3 keeps outputting the first control signal according to the first sampling signal; when the power supply circuit 4 switches to output the second power supply voltage, the control circuit 3 detects that the sampling signal sampled by the sampling module 11 changes, and can output the second control signal to the second voltage divider unit 122, so that the second voltage divider unit 122 is connected in parallel with the first voltage divider unit 121, so that the high-voltage sampling circuit 1 adapts to the change of the power supply voltage.

[0055] In an exemplary embodiment, see Figure 3 The first voltage-dividing unit 121 includes at least one first voltage-dividing resistor R1. The second voltage-dividing unit 122 includes at least one second voltage-dividing resistor R2 and a first optical coupler Q1, wherein a first end of the first optical coupler Q1 is connected to the second voltage-dividing resistor R2, a second end of the first optical coupler Q1 is connected to the sampling module, a third end of the first optical coupler is connected to the control circuit, and a fourth end of the first optical coupler is grounded.

[0056] When the second voltage divider unit 122 receives the second control signal, the first end and the second end of the first optical coupler Q1 are turned on; when the second voltage divider unit 122 receives the first control signal, the first end and the second end of the first optical coupler Q1 are turned off.

[0057] In this embodiment, when the power supply circuit 4 outputs the first power supply voltage, the control circuit 3 outputs the first control signal according to the first sampling signal to disconnect the first end and the second end of the first optocoupler Q1; when the power supply circuit 3 outputs the second power supply voltage, the control circuit 3 outputs the second control signal according to the second sampling signal to connect the first end and the second end of the first optocoupler Q1, so that the second voltage divider unit 122 is connected in parallel with the first voltage divider unit 121.

[0058] In an exemplary embodiment, please refer to Figure 3 , the sampling signal includes a voltage signal, and the sampling module 11 includes:

[0059] The sampling resistor R3 is connected to each voltage dividing unit. The sampling unit 111 is connected to the sampling resistor R3 and the control circuit 3 respectively, and is used to sample the voltage signal at both ends of the sampling resistor R3 and output the voltage signal to the control circuit 3. Among them, the control circuit 3 is used to control the parallel state of each voltage dividing unit to control the voltage signal to be within a preset voltage range.

[0060] In one example, the power supply circuit 4 is still capable of outputting a first power supply voltage and a second power supply voltage, and the first power supply voltage is greater than the second power supply voltage. In a normal state, the control circuit 3 controls the second voltage divider unit 122 to be disconnected, and the sampling unit 111 can sample the voltage signal at both ends of the sampling resistor R3 and output it to the control circuit 3. When the power supply circuit 4 outputs the first power supply voltage, the sampling unit 111 outputs the first sampling signal to the control circuit 3. For example, the first sampling signal can be a 3V voltage signal. The control circuit 3 determines that the first sampling signal is within a preset voltage range, and can output a first control signal according to the first sampling signal to keep the first end and the second end of the first optical coupler Q1 disconnected; when the power supply circuit 4 outputs the second power supply voltage, due to the second power supply The voltage is less than the first power supply voltage, and the voltage signal across the sampling resistor R3 sampled by the sampling unit 111 decreases. Exemplarily, the voltage signal across the sampling resistor R3 decreases from 3V to 1.5V, and the sampling unit 111 outputs a second sampling signal to the control circuit 3. The control circuit 3 determines that the second sampling signal exceeds the preset voltage range, and outputs a second control signal according to the second sampling signal to turn on the first end and the second end of the first optical coupler Q1. After the first end and the second end of the first optical coupler Q1 are turned on, the voltage signal across the sampling resistor R3 will increase, that is, the second sampling signal will increase. When the control circuit 3 detects that the second sampling signal is within the preset voltage range, it indicates that the current working state of the high-voltage sampling circuit 1 matches the power supply voltage output by the power supply circuit 4.

[0061] In an exemplary embodiment, please refer to Figure 3The sampling module 11 also includes a filtering unit 112. The filtering unit 112 is connected to the sampling resistor R3 and the sampling unit 111 respectively, and is used to filter the voltage signal. The sampling unit 111 may include an isolation sampling subunit 1111 and a differential amplifier subunit 1112, so as to isolate the high voltage from the low voltage through the isolation sampling subunit 1111, and protect the control circuit 3.

[0062] In an exemplary embodiment, see Figure 4 The high-voltage protection circuit 2 includes a plurality of protection modules 20 connected in parallel, wherein the electrical parameters of each protection module 20 are different, and the number of the protection modules 20 is greater than or equal to the number of the voltage dividing units 120. The control circuit 3 is connected to each protection module 20 respectively, and the control circuit 3 is also used to output a control signal to each protection unit to control the target protection module in the protection module 20 to conduct the path between the power supply circuit 4 and the power conversion circuit 5.

[0063] In the application, the power conversion circuit 5 can convert the high-voltage electrical signal into the low-voltage electrical signal required by the driving device. There should be a high-voltage protection circuit 2 for protecting the power conversion circuit 5 between the power conversion circuit 5 and the power supply circuit 4. The power supply voltage received by the power conversion circuit 5 is different, and the parameters for protecting the power conversion circuit 5 should also be different. In the present application, by setting a plurality of parallel protection modules 20 in the high-voltage protection circuit 2, the control circuit 3 can select a suitable protection module 20 to protect the power conversion circuit 5 according to the size of the power supply voltage.

[0064] In an exemplary embodiment, the protection module includes a second optical coupler, a protection unit, and a third optical coupler. The first end of the second optical coupler is connected to the power supply circuit, the second end of the second optical coupler is connected to the first end of the protection unit, the third end of the second optical coupler is connected to the control circuit, and the fourth end of the second optical coupler is grounded. The first end of the third optical coupler is connected to the second end of the protection unit, the second end of the third optical coupler is connected to the power conversion circuit, the third end of the third optical coupler is connected to the control circuit, and the fourth end of the third optical coupler is grounded.

[0065] The control circuit 3 can control the switches of the second optocoupler and the third optocoupler to select a target protection module from multiple protection modules 20 to match the supply voltage, wherein the second optocoupler and the third optocoupler are turned on or off at the same time, and there is only one target protection module among the multiple protection modules 20 at the same time.

[0066] In an exemplary embodiment, the control signal further includes a third control signal and a fourth control signal; the high-voltage protection circuit 2 includes a first protection module 21 and a second protection module 22 .

[0067] The first protection module 21 is connected to the control circuit 3 and the power supply circuit 4 respectively, and the second protection module is connected to the control circuit 3 and the power supply circuit 4 respectively.

[0068] Specifically, the first protection module 21 includes a second optical coupler Q2-1, a first protection unit 211, and a third optical coupler Q3-1. The first end of the second optical coupler Q2-1 is connected to the power supply circuit 4, the second end of the second optical coupler Q2-1 is connected to the first end of the first protection unit 211, the third end of the second optical coupler Q2-1 is connected to the control circuit, and the fourth end of the second optical coupler is grounded. The first end of the third optical coupler Q3-1 is connected to the second end of the first protection unit 211, the second end of the third optical coupler Q3-1 is connected to the power conversion circuit 5, the third end of the third optical coupler Q3-1 is connected to the control circuit, and the fourth end of the third optical coupler Q3-1 is grounded.

[0069] The second protection module 22 includes a second optical coupler Q2-2, a second protection unit 221 and a third optical coupler Q3-2. The first end of the second optical coupler Q2-2 is connected to the power supply circuit 4, the second end of the second optical coupler Q2-2 is connected to the first end of the first protection unit 221, the third end of the second optical coupler Q2-2 is connected to the control circuit, and the fourth end of the second optical coupler is grounded. The first end of the third optical coupler Q3-2 is connected to the second end of the second protection unit 221, the second end of the third optical coupler Q3-2 is connected to the power conversion circuit 5, the third end of the third optical coupler Q3-2 is connected to the control circuit, and the fourth end of the third optical coupler Q3-2 is grounded.

[0070] In this embodiment, the example in which the power supply circuit 4 can output the first power supply voltage and the second power supply voltage, and the first power supply voltage is greater than the second power supply voltage is still used for explanation. The first protection module 21 is a protection module matching the first power supply voltage, and the second protection module 22 is a protection module matching the second power supply voltage. When the control circuit 3 detects that the power supply voltage is the first power supply voltage, it will not only control the first end and the second end of the first optical coupler Q1 to be disconnected, but also output a third control signal to turn on the first end and the second end of the second optical coupler Q2-1, and turn on the first end and the second end of the third optical coupler Q3-1, disconnect the first end and the second end of the second optical coupler Q2-2, and disconnect the first end and the second end of the third optical coupler Q3-2, so that the first protection module 21 is in a working state and the second protection module 22 is in a non-working state. When the control circuit 3 detects that the power supply voltage is the second power supply voltage, it will not only control the first end and the second end of the first optocoupler Q1 to be turned on, but also output a fourth control signal to turn on the first end and the second end of the second optocoupler Q2-2, and the first end and the second end of the third optocoupler Q3-2, and disconnect the first end and the second end of the second optocoupler Q2-1, and disconnect the first end and the second end of the third optocoupler Q3-1.

[0071] In application, the protection unit may include components such as a voltage stabilizing inductor, a transient suppression diode, and a filter capacitor. In an example, the first protection unit 211 includes a first voltage stabilizing inductor L2-1, a first transient suppression diode Z2-1, a second filter capacitor C2-1, and a third filter capacitor C3-1. The first end of the first voltage stabilizing inductor L2-1 is connected to the second end of the second optical coupler Q2-1, and the second end of the first voltage stabilizing inductor L2-1 is respectively connected to the first pole of the first transient suppression diode Z2-1, the first end of the second filter capacitor C2-1, the first end of the third filter capacitor C3-1, and the first end of the third optical coupler Q3-1, and the second pole of the first transient suppression diode Z2-1, the second end of the second filter capacitor C2-1, and the second end of the third filter capacitor C3-1 are grounded.

[0072] The second protection unit 221 includes a second voltage stabilizing inductor L2-2, a second transient suppression diode Z2-2, a fourth filter capacitor C2-2 and a fifth filter capacitor C3-2. The first end of the second voltage stabilizing inductor L2-2 is connected to the second end of the second optical coupler Q2-2, the second end of the second voltage stabilizing inductor L2-2 is respectively connected to the first electrode of the second transient suppression diode Z2-2, the first end of the fourth filter capacitor C2-2, the first end of the fifth filter capacitor C3-2 and the first end of the third optical coupler Q3-2, the second electrode of the second transient suppression diode Z2-2, the second end of the fourth filter capacitor C2-2 and the second end of the fifth filter capacitor C3-2 are grounded.

[0073] In an exemplary embodiment, the present application provides a motor controller, which includes a control board and the driving device in any of the above embodiments.

[0074] In an exemplary embodiment, the present application provides a vehicle, which includes a high-voltage battery pack and the motor controller in the above embodiment.

[0075] In application, after the motor controller including the drive device of the present application is tested, the tested motor controller can be assembled on the vehicle. Before assembly, a 0 ohm resistor can be packaged at both ends of the target optocoupler according to the battery system of the assembled vehicle. Exemplarily, the power supply circuit 4 in the test platform is capable of outputting a first power supply voltage and a second power supply voltage. When the power supply circuit 4 outputs the first power supply voltage, the driving device controls the disconnection of the first end and the second end of the first optical coupler Q1, the connection of the first end and the second end of the second optical coupler Q2-1, and the connection of the first end and the second end of the third optical coupler Q3-1, the disconnection of the first end and the second end of the second optical coupler Q2-2, and the disconnection of the first end and the second end of the third optical coupler Q3-2 to adapt to the first power supply voltage; when the power supply circuit 4 outputs the second power supply voltage, the driving device controls the connection of the first end and the second end of the first optical coupler Q1, the connection of the first end and the second end of the second optical coupler Q2-2, and the connection of the first end and the second end of the third optical coupler Q3-2 to adapt to the first power supply voltage, and the disconnection of the first end and the second end of the second optical coupler Q2-1, and the disconnection of the first end and the first end and the second end of the third optical coupler Q3-1. When the battery system in the assembled vehicle is provided with a second power supply voltage, it is only necessary to package a 0 ohm resistor at both ends of the first optocoupler Q1, the second optocoupler Q2-2 and the third optocoupler Q3-2, wherein the packaging models of each optocoupler and the 0 ohm resistor of the present application are the same.

[0076] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0077] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A driving device, characterized in that: The driving device comprises: a high voltage sampling circuit, a high voltage protection circuit and a control circuit; wherein, The high-voltage sampling circuit includes a sampling module and a voltage dividing module. The voltage dividing module includes at least two voltage dividing units. Each of the voltage dividing units is connected to the power supply circuit and the sampling module respectively, and at least one of the voltage dividing units is connected to the control circuit. The sampling module is connected to the control circuit. The sampling module is used to sample the voltage of the power supply voltage output by the power supply circuit after being divided by the voltage dividing module, and output a sampling signal; the control circuit is used to output a control signal to the voltage dividing unit according to the sampling signal, so as to control the parallel state of each of the voltage dividing units; The high-voltage protection circuit is connected to the control circuit, and the high-voltage protection circuit is used to be connected to the power supply circuit and the power conversion circuit. The control circuit is also used to output the control signal to the high-voltage protection circuit to control the working state of the high-voltage protection component.

2. The driving device according to claim 1, characterized in that: The sampling module is used to sample the voltage of the first power supply voltage output by the power supply circuit after being divided by the voltage divider module, and output a first sampling signal, and to sample the voltage of the second power supply voltage output by the power supply circuit after being divided by the voltage divider module, and output a second sampling signal; wherein the first power supply voltage is greater than the second power supply voltage; The control circuit is used to output a first control signal according to the first sampling signal, and output a second control signal according to the second sampling signal; The voltage dividing module at least includes a first voltage dividing unit and a second voltage dividing unit; The first voltage dividing unit is connected to the power supply circuit and the sampling module respectively, and the first voltage dividing unit is used to conduct a first path between the power supply circuit and the sampling module; The second voltage divider unit is connected to the power supply circuit, the control circuit and the sampling module respectively. The second voltage divider unit is used to open the second path between the power supply circuit and the sampling module according to the second control signal so as to be connected in parallel with the first voltage divider unit. The second voltage divider unit is also used to disconnect the second path between the power supply circuit and the sampling module when receiving the first control signal.

3. The driving device according to claim 2, characterized in that: The first voltage dividing unit includes at least one first voltage dividing resistor; The second voltage-dividing unit includes at least one second voltage-dividing resistor and a first optical coupler, wherein a first end of the first optical coupler is connected to the second voltage-dividing resistor, a second end of the first optical coupler is connected to the sampling module, a third end of the first optical coupler is connected to the control circuit, and a fourth end of the first optical coupler is grounded; When the second voltage divider unit receives a second control signal, the first end and the second end of the first optical coupler are turned on; when the second voltage divider unit receives a first control signal, the first end and the second end of the first optical coupler are turned off.

4. The driving device according to claim 1, characterized in that: The sampling signal includes a voltage signal; The sampling module comprises: A sampling resistor connected to each of the voltage dividing units; a sampling unit, connected to the sampling resistor and the control circuit respectively, for sampling a voltage signal across the sampling resistor and outputting the voltage signal to the control circuit; Wherein, the control circuit is used to control the parallel connection state of each of the voltage dividing units to control the voltage signal to be within a preset voltage range.

5. The driving device according to claim 4, characterized in that: The sampling module also includes: A filtering unit is connected to the sampling resistor and the sampling unit respectively, and is used for filtering the voltage signal.

6. The driving device according to claim 1, characterized in that: The high-voltage protection circuit includes a plurality of protection modules connected in parallel, wherein the electrical parameters of the protection modules are different, and the number of the protection modules is greater than or equal to the number of the voltage dividing units; The control circuit is connected to each of the protection modules respectively, and is further used to output the control signal to each of the protection units to control a target protection module in the protection module to conduct a path between the power supply circuit and the power conversion circuit.

7. The driving device according to claim 6, characterized in that: The protection module includes a second optical coupler, a protection unit and a third optical coupler; The first end of the second optical coupler is connected to the power supply circuit, the second end of the second optical coupler is connected to the first end of the protection unit, the third end of the second optical coupler is connected to the control circuit, and the fourth end of the second optical coupler is grounded; The first end of the third optical coupler is connected to the second end of the protection unit, the second end of the third optical coupler is connected to the power conversion circuit, the third end of the third optical coupler is connected to the control circuit, and the fourth end of the third optical coupler is grounded.

8. The driving device according to claim 6, characterized in that: The control signal further includes a third control signal and a fourth control signal; the high voltage protection circuit includes a first protection module and a second protection module; The first protection module is connected to the control circuit and the power supply circuit respectively, and the second protection module is connected to the control circuit and the power supply circuit respectively; Among them, when the control circuit outputs a third control signal, the first protection module is in a working state and the second protection module is in a non-working state; when the control circuit outputs a fourth control signal, the second protection module is in a working state and the first protection module is in a non-working state.

9. A motor controller, characterized in that: The motor controller comprises a control board and a driving device according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle includes a high-voltage battery pack and the motor controller of claim 9.

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