Power control module and test system thereof

Abstract

The utility model provides a power control module and a test system thereof. The power control module comprises a first capacitor, a voltage conversion circuit and an electric control circuit; the first capacitor is used for connecting a first power supply; the first capacitor, the voltage conversion circuit and the electric control circuit are sequentially connected; the first capacitor inputs electric energy provided by the first power supply to the voltage conversion circuit; the voltage conversion circuit boosts the input electric energy and outputs the boosted electric energy to the electric control circuit; the output end of the voltage conversion circuit is connected with an interface device which is used for connecting a test auxiliary circuit. In the mode, the output end of the voltage conversion circuit is connected with the interface device, and the test auxiliary circuit is connected through the interface device, so that the voltage conversion circuit is independently tested, and the circuit test accuracy and test efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a power control module and its testing system. Background Technology

[0002] The power control module mainly includes a voltage conversion circuit and a dual-control circuit. The battery provides DC power to the voltage conversion circuit through a capacitor. The voltage conversion circuit boosts this DC power before transmitting it to the dual-control circuit. The inverter in the dual-control circuit converts the DC power into AC power, which then powers the motor. However, related technologies can only test the overall efficiency of the power control module, making it difficult to test the circuit efficiency of the voltage conversion circuit, thus reducing test accuracy and efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a power control module and its testing system for separately testing voltage conversion circuits, thereby improving the accuracy and efficiency of circuit testing.

[0004] In a first aspect, embodiments of this application provide a power control module, which includes: a first capacitor, a voltage conversion circuit, and an electronic control circuit; the first capacitor is used to connect to a first power source, and the first capacitor, voltage conversion circuit, and electronic control circuit are connected in sequence; the first capacitor inputs electrical energy provided by the first power source to the voltage conversion circuit; the voltage conversion circuit boosts the input electrical energy and outputs it to the electronic control circuit; the output terminal of the voltage conversion circuit is connected to an interface device, which is used to connect to a test auxiliary circuit.

[0005] The output of the voltage conversion circuit described above includes a second capacitor, and the interface device is connected to the positive terminal of the second capacitor.

[0006] The aforementioned electronic control circuit includes a first electronic control circuit and a second electronic control circuit, which are connected to the output terminal of the voltage conversion circuit.

[0007] Secondly, embodiments of this application provide a test system for a power control module. The test system includes: a test auxiliary circuit and the aforementioned power control module; the test auxiliary circuit is connected to the interface device in the power control module.

[0008] The aforementioned test system also includes a first power supply, which is connected to the first capacitor in the power control module.

[0009] The aforementioned test auxiliary circuit includes a second power supply. The positive terminal of the second power supply is connected to the interface device in the power control module, and the negative terminal of the second power supply is connected to the negative terminal of the first capacitor.

[0010] The aforementioned test auxiliary circuit includes an inductor. The first end of the inductor is connected to the interface device, and the second end of the inductor is connected to the power device of the voltage conversion circuit in the power control module.

[0011] The aforementioned inductor includes multiple components; the voltage conversion circuit includes multiple power branches; each power branch includes at least one power device; the first ends of the multiple inductor components are all connected to an interface device, and the second ends of the multiple inductor components are respectively connected to their corresponding power branches.

[0012] The aforementioned test system also includes a first current sampling device and a second current sampling device; the first current sampling device is located between the first power supply and the first capacitor in the power control module, and the second current sampling device is located between the interface device in the power control module and the second power supply.

[0013] The aforementioned testing system also includes a temperature sampling device, which is installed in the power device of the voltage conversion circuit in the power control module.

[0014] The aforementioned power control module and its testing system include a first capacitor, a voltage conversion circuit, and an electronic control circuit. The first capacitor is connected to a first power source, and the first capacitor, voltage conversion circuit, and electronic control circuit are connected sequentially. The first capacitor inputs electrical energy from the first power source to the voltage conversion circuit. The voltage conversion circuit boosts the input electrical energy and outputs it to the electronic control circuit. An interface device is connected to the output terminal of the voltage conversion circuit, which is used to connect to a test auxiliary circuit. In this method, by connecting an interface device to the output terminal of the voltage conversion circuit and then connecting the test auxiliary circuit through this interface device, the voltage conversion circuit can be tested independently, improving the accuracy and efficiency of circuit testing.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a circuit diagram of the power control module in the related technology;

[0018] Figure 2 A schematic diagram of a power control module provided in an embodiment of this application;

[0019] Figure 3 A schematic diagram of another power control module provided in an embodiment of this application;

[0020] Figure 4 A schematic diagram of a test system for a power control module provided in an embodiment of this application;

[0021] Figure 5 A schematic diagram of a test system for another power control module provided in an embodiment of this application;

[0022] Figure 6 A circuit diagram of a test system for a power control module provided in an embodiment of this application;

[0023] Figure 7 A circuit diagram of a test system for another power control module provided in an embodiment of this application;

[0024] Figure 8 A circuit diagram of a test system for another power control module provided in an embodiment of this application;

[0025] Figure 9 A circuit diagram of a test system for another power control module provided in an embodiment of this application;

[0026] Figure 10 A circuit diagram of a test system for another power control module provided in an embodiment of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Figure 1 The diagram shows the power control module in the related technology. The high-voltage input source provides DC power, and the power control module converts the DC power into the WUV three-phase current and three-phase voltage required by the motor through an inverter to provide power to the motor. The motor drives the vehicle to move forward, reverse, and provide energy feedback, etc.

[0029] In the power control module, the high-voltage input source provides DC power, which is stored and filtered by capacitor Cin. The DC power is then input to the voltage conversion circuit, such as the BOOST circuit, to boost the input power. The boosted DC power is then input to the P1 and P3 electronic control circuits, which further invert the DC power to AC power. The AC power is then supplied to motors Motor1 and Motor2.

[0030] When testing the power control module, only the overall efficiency of the module can be tested, making it difficult to test the circuit efficiency of the voltage conversion circuit, which reduces the accuracy and efficiency of the test.

[0031] Based on this, the power control module and its testing system provided in this application embodiment can be applied to the testing of the power control module.

[0032] To facilitate understanding of this embodiment, a power control module disclosed in this application will first be described in detail, such as... Figure 2 As shown, the power control module includes: a first capacitor 20, a voltage conversion circuit 21, and an electronic control circuit 22;

[0033] The first capacitor is used to connect to the first power source. The first capacitor, voltage conversion circuit, and electronic control circuit are connected in sequence. The first capacitor has the functions of energy storage and filtering. The first power source can be a battery or other DC power source, and it is used to output DC power. The voltage conversion circuit can be a BOOST circuit, a BUCK circuit, or other types of circuits with voltage conversion functions such as boosting or bucking. The electronic control circuit can include one or more circuits. When there are multiple electronic control circuits, the motors included in different electronic control circuits can be different; for example, they can be drive motors, generator motors, etc.

[0034] The first capacitor inputs the electrical energy provided by the first power source into the voltage conversion circuit; the voltage conversion circuit boosts the input electrical energy and outputs it to the electronic control circuit; the output terminal of the voltage conversion circuit is connected to the interface device 23, which is used to connect to the test auxiliary circuit.

[0035] In this embodiment, in order to perform efficiency testing on the voltage conversion circuit, an interface device is connected to the output terminal of the voltage conversion circuit. This interface device is used to connect to the test auxiliary circuit. The interface model of the interface device is usually matched with the test auxiliary circuit. The test auxiliary circuit can be an energy storage power supply, an inductor, etc. Specifically, the corresponding type of test auxiliary circuit can be selected according to the different test parameters of the voltage conversion circuit.

[0036] The aforementioned power control module includes a first capacitor, a voltage conversion circuit, and an electronic control circuit. The first capacitor is connected to a first power source, and the first capacitor, voltage conversion circuit, and electronic control circuit are connected sequentially. The first capacitor inputs electrical energy provided by the first power source to the voltage conversion circuit. The voltage conversion circuit boosts the input electrical energy and outputs it to the electronic control circuit. An interface device is connected to the output terminal of the voltage conversion circuit, and the interface device is used to connect to a test auxiliary circuit. In this method, an interface device is connected to the output terminal of the voltage conversion circuit, and the test auxiliary circuit is connected through this interface device, thereby allowing the voltage conversion circuit to be tested independently, improving the accuracy and efficiency of circuit testing.

[0037] See Figure 3 Another power control module shown includes a second capacitor 210 at the output of its voltage conversion circuit, with an interface device connected to the positive terminal of the second capacitor. The positive terminal of the second capacitor outputs the boosted DC power from the voltage conversion circuit, which is then output to the test auxiliary circuit via the interface device. Specifically, this interface device can be a DC output interface.

[0038] The aforementioned electronic control circuit includes a first electronic control circuit 221 and a second electronic control circuit 222, which are connected to the output terminal of the voltage conversion circuit. The first and second electronic control circuits are connected in parallel and are respectively connected to the output terminal of the voltage conversion circuit, which supplies power to the first and second electronic control circuits respectively.

[0039] The first electronic control circuit includes a P1 motor, and the second electronic control circuit includes a P3 motor. The first and second electronic control circuits contain motors of different models. Besides the motors, both the first and second electronic control circuits include power devices used to invert the DC power output from the voltage conversion circuit to obtain WUV three-phase AC power.

[0040] See Figure 4 The diagram illustrates a test system for a power control module. The system includes a test auxiliary circuit 40 and a power control module 41. The test auxiliary circuit is connected to interface devices within the power control module. The test auxiliary circuit may include an energy storage power source, an inductor, etc., and can acquire parameters such as the output current and output power of the voltage conversion circuit.

[0041] See Figure 5 The testing system also includes a first power supply 50, which is connected to a first capacitor in the power control module. This first power supply can be a battery, and it outputs DC power. The first capacitor is located at the input of the power control module and is used to filter and store the DC power output from the first power supply.

[0042] The aforementioned test auxiliary circuit includes a second power supply 51. The positive terminal of the second power supply is connected to the interface device in the power control module, and the negative terminal of the second power supply is connected to the negative terminal of the first capacitor. This second power supply can also be a battery, used to store the electrical energy output by the voltage conversion circuit. By connecting the second power supply, the voltage conversion circuit outputs electrical energy to the second power supply, and the output power and output current of the voltage conversion circuit can be tested.

[0043] Figure 6 A circuit diagram of a test system is shown, in which the BOOST circuit is a voltage conversion circuit, and the electronic control circuit includes P1 and P3 electronic control circuits. The first capacitor is Cin, and the second capacitor is Cout. An interface device is connected to the positive terminal of the second capacitor and the positive terminal of the second power supply. The negative terminal of the second power supply is connected to the negative terminal of the first capacitor Cout, and is also the negative terminal of the first power supply.

[0044] pass Figure 6 The circuit diagram shown indicates that the output voltage of the interface device is at the same potential as the voltage output from the voltage conversion circuit to the electronic control circuit. The high-voltage DC power output from the first power source is input to the BOOST circuit through the first capacitor Cin, and then supplies power to the first and second electronic control circuits through the second capacitor Cout at the output of the voltage conversion circuit, thereby controlling the motor to work.

[0045] Meanwhile, the voltage conversion circuit outputs electrical energy to the second power source through the interface device, and the second power source stores the electrical energy output by the voltage conversion circuit.

[0046] refer to Figure 7 The testing system also includes a first current sampling device K1 and a second current sampling device K2. The first current sampling device is located between the first power supply and the first capacitor in the power control module, and the second current sampling device is located between the interface device in the power control module and the second power supply. The first current sampling device is used to collect the output current of the first power supply, and the second current sampling device is used to collect the output current of the voltage conversion circuit.

[0047] Multiplying the output current and output voltage of the first power source yields the input power of the voltage conversion circuit. Multiplying the output current and output voltage of the voltage conversion circuit yields its output power. Dividing the output power of the voltage conversion circuit by its input power gives the efficiency of the voltage conversion circuit.

[0048] The current collected by the aforementioned current sampling device can also be used to test the current-carrying capacity of the voltage conversion circuit.

[0049] Furthermore, by collecting the output current and output voltage of each electronic control circuit, the output power of that circuit is calculated. The ratio of the output power of the electronic control circuit to the output power of the voltage conversion circuit indicates the efficiency of that electronic control circuit. Therefore, through this embodiment, the power of the voltage conversion circuit and each electronic control circuit in the power control module can be tested separately, improving testing efficiency and accuracy.

[0050] Furthermore, the aforementioned testing system also includes a temperature sampling device, which is installed in the power device of the voltage conversion circuit in the power control module. Figure 7 In the example, taking the BOOST circuit as an example, the BOOST circuit includes four power devices, each of which is equipped with a temperature sampling device, including a total of temperature sampling devices R1, R2, R3 and R4.

[0051] Temperature sampling devices can be used to collect temperature changes of power devices during circuit operation, thereby obtaining temperature test data of the power devices and enabling temperature testing of the power devices.

[0052] In another way, such as Figure 8 The test auxiliary circuit includes an inductor 80, with its first end connected to an interface device and its second end connected to a power device in the voltage conversion circuit of the power control module. This inductor is used to perform a double-pulse test on the voltage conversion circuit.

[0053] refer to Figure 9 The first end of the inductor L1 is connected to the interface device, and the second end is connected between the power devices R2 and R4.

[0054] The aforementioned inductor includes multiple components; the voltage conversion circuit includes multiple power branches; each power branch includes at least one power device; the first ends of the multiple inductor components are all connected to an interface device, and the second ends of the multiple inductor components are respectively connected to their corresponding power branches.

[0055] exist Figure 10 In the example, the voltage conversion circuit includes two parallel power branches, each containing two power devices connected in series. Inductor L1 is connected to the power branch consisting of power devices R2 and R4, with its second terminal connected between R2 and R4. Inductor L2 is connected to the power branch consisting of power devices R1 and R3, with its second terminal connected between R1 and R3.

[0056] After the first power supply is activated, the second capacitor Cout charges. Then, the first power supply is disconnected, and the control board sends a waveform to the power device in the voltage conversion circuit. The control board then collects the turn-on voltage and current of the power device to test its performance parameters. Alternatively, the control board controls the power device to block the waveform, and then collects the turn-off voltage and current of the power device to test its performance parameters.

[0057] In the above method, by setting an interface device at the output of the voltage conversion circuit, the voltage conversion circuit can be tested, which can effectively improve the test accuracy, reduce the test time, and improve the overall test efficiency for the power control module.

[0058] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0059] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0061] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A power control module, characterized in that, The power control module includes: a first capacitor, a voltage conversion circuit, and an electronic control circuit; The first capacitor is used to connect to the first power supply, and the first capacitor, the voltage conversion circuit and the electronic control circuit are connected in sequence; The first capacitor inputs the electrical energy provided by the first power source to the voltage conversion circuit; the voltage conversion circuit boosts the input electrical energy and outputs it to the electronic control circuit. The output terminal of the voltage conversion circuit is connected to an interface device, which is used to connect to a test auxiliary circuit.

2. The power control module according to claim 1, characterized in that, The output terminal of the voltage conversion circuit includes a second capacitor, and the interface device is connected to the positive terminal of the second capacitor.

3. The power control module according to claim 1, characterized in that, The electronic control circuit includes a first electronic control circuit and a second electronic control circuit, which are connected to the output terminal of the voltage conversion circuit.

4. A testing system for a power control module, characterized in that, The testing system includes: a testing auxiliary circuit and the power control module according to any one of claims 1-3; The test auxiliary circuit is connected to the interface device in the power control module.

5. The testing system according to claim 4, characterized in that, The test system also includes a first power supply, which is connected to a first capacitor in the power control module.

6. The testing system according to claim 4, characterized in that, The test auxiliary circuit includes a second power supply, the positive terminal of which is connected to the interface device in the power control module, and the negative terminal of which is connected to the negative terminal of the first capacitor.

7. The testing system according to claim 4, characterized in that, The test auxiliary circuit includes an inductor, with a first end connected to the interface device and a second end connected to the power device of the voltage conversion circuit in the power control module.

8. The testing system according to claim 7, characterized in that, The inductor includes multiple components; the voltage conversion circuit includes multiple power branches; and each power branch includes at least one power component. The first ends of the plurality of inductors are all connected to the interface device, and the second ends of the plurality of inductors are respectively connected to the corresponding power branches.

9. The testing system according to claim 4, characterized in that, The test system also includes a first current sampling device and a second current sampling device; The first current sampling device is disposed between the first power supply and the first capacitor in the power control module, and the second current sampling device is disposed between the interface device in the power control module and the second power supply.

10. The testing system according to claim 4, characterized in that, The testing system also includes a temperature sampling device, which is installed in the power device of the voltage conversion circuit in the power control module.

Images