Motor control module, charging device, method for controlling charging of the charging device, and vehicle

Abstract

The application provides a motor control module, a charging device, a method for controlling the charging of the charging device, and a vehicle. The motor control module comprises a filter unit, a motor controller, and a boost circuit. The boost circuit is connected to the motor controller through the filter unit. The motor controller and the boost circuit share a high-voltage negative electrode of the motor controller. The boost circuit is configured to provide a boost function and, in cooperation with the filter unit, provide a filtering function. The motor controller is configured to provide a motor driving function. In this way, a separate filter circuit is avoided in the boost circuit, higher integration of topology and circuit function fusion in the charging device are achieved, the hardware cost of the charging device is effectively reduced, the size of the charging device is reduced, and the market competitiveness of the charging device is improved.

Description

Technical Field

[0001] This application relates to the field of battery control, and in particular to a motor control module, a charging device, a method for controlling the charging device to charge, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicles, in order to improve charging speed and charging experience, more and more companies are increasing the battery voltage of new energy vehicles from 400V to around 800V, and even reaching a maximum voltage of 900V. Currently, there are two types of maximum output voltages for high-power DC charging piles: 450V and 750V. Neither of these voltages can meet the DC fast charging requirements of high-voltage new energy vehicles.

[0003] Typically, the voltage matching problem between high-power DC charging piles and high-voltage batteries is solved by adding a boost system to high-voltage new energy vehicles. However, boost systems are costly. Specifically, two wiring harnesses need to be routed from the charging interface module of the high-voltage new energy vehicle to the boost system, which is expensive; the EMC (Electromagnetic Compatibility) filter circuit in the boost system is costly and bulky; the boost system requires two relays, which are also costly and bulky; and the boost system has low integration and low power density. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a motor control module, a charging device, a method for controlling the charging of the charging device, and a vehicle, so as to solve or partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, a first aspect of this application provides a motor control module, comprising: a filter unit, a motor controller, and a boost circuit; the boost circuit is connected to the motor controller via the filter unit, and the motor controller and the boost circuit share the high-voltage negative terminal of the motor controller; the boost circuit is configured to provide a boost function and, in cooperation with the filter unit, provide a filtering function; the motor controller is configured to provide a motor drive function.

[0006] The second aspect of this application provides a charging device, including: a charging interface module, a motor module, a control module, and a motor control module as described in the first aspect; The charging interface module is connected to the external power supply, the battery and the motor control module respectively, and the charging interface module is configured to provide an interface to the external power supply and the battery. The motor module is connected to the motor control module, wherein the motor control module is configured to provide boost and filtering functions, and the motor module is configured to provide an energy storage inductor to the motor control module; The control module is connected to the charging interface module, the motor control module, and the motor module respectively. The control module is configured to control the charging interface module, the motor control module, and the motor module so that the external power supply can perform boost charging and direct charging of the battery.

[0007] A third aspect of this application provides a method for controlling the charging of a charging device, the method being applied to the charging device as described in the second aspect, the charging device comprising: a charging interface module, a motor control module, a motor module, and a control module, the method comprising: The control module obtains the charging voltage of the external power supply and the target voltage of the battery; In response to determining that the charging voltage is less than the target voltage, the control module controls multiple relays in the charging interface module and multiple relays in the motor control module to turn on or off, and controls multiple switching transistors in the motor control module to work alternately, to complete the boost charging process of the battery. In response to determining that the charging voltage is greater than or equal to the target voltage, the control module controls the relay in the charging interface module to turn on or off, thereby completing the direct charging process of the battery.

[0008] A fourth aspect of this application provides a vehicle device including a charging device as described in the third aspect.

[0009] As can be seen from the above, the motor control module, charging device, method for controlling the charging device, and vehicle provided in this application share the high-voltage negative terminal of the motor controller through the boost circuit in the motor control module, which facilitates the integrated circuit of the boost circuit and the motor controller. The boost circuit is connected to the motor controller through a filter unit, and the filtering function of the boost circuit is realized by reusing the filter unit, avoiding the need to set up a separate filter circuit in the boost circuit. This achieves a higher degree of integration in the topology and circuit function of the charging device, effectively reducing the hardware cost of the charging device, reducing the size of the charging device, and improving the market competitiveness of the charging device. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a charging device in related technologies; Figure 2 This is a schematic diagram of the structure of the motor control module according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the charging device according to an embodiment of this application; Figure 4a A schematic diagram illustrating the charging process of the control charging device according to an embodiment of this application; Figure 4b This is a schematic diagram of the boost circuit of the control charging device according to an embodiment of this application; Figure 4c This is a schematic diagram of the switching transistor control signal according to an embodiment of this application; Figure 5 This is a physical diagram of the hardware structure of a computer device according to an embodiment of this application.

[0012] Explanation of reference numerals in the attached figures: 100, Charging system in related art; 101. External power supply; 102. Charging interface module; 1021. Second relay; 1022. Third relay; 1023. Fourth relay; 1024. Fifth relay; 1025. Sixth relay; 1026. Seventh relay; 1027. Positive interface; 1028. Negative interface; 103. Motor drive module; 104. Motor module; 1041. Neutral point; 1042. Three-phase motor winding; 1043. Three-phase motor interface; 105. Battery; 106. Boost module; 1061. First boost relay; 1062. Second boost relay; 1063. Boost filter circuit; 107. Control charging module; 108. First wiring harness; 109. Second wiring harness; 200. The motor control module of this application embodiment; 201. Filter unit; 2011. Second inductor; 2012. Third inductor; 2013. Third capacitor; 2014. Fourth capacitor; 202. Motor controller; 2021. High voltage negative terminal; 2022. High voltage positive terminal; 2023. Three-phase bridge circuit; 20231. Switching transistor; 203. Boost circuit; 2031. First capacitor; 2032. Second capacitor; 2033. First inductor; 2034. First relay; 204. DC interface; 205. Motor drive interface; 300. The charging device according to the embodiments of this application; 301. Control Module. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0015] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0016] In related technologies, such as Figure 1As shown, the charging system 100 for high-voltage new energy vehicles includes: an external power supply 101, a charging interface module 102, a motor drive module 103, a motor module 104, a battery 105, a boost module 106, and a control charging module 107. The external power supply 101 is connected to the charging interface module 102. The charging interface module 102 is connected to the battery 105, the motor drive module 103, and the boost module 106, respectively. The motor drive module 103 is connected to the charging interface module 102 and the motor module 104, respectively. The control charging module 107 is connected to the charging interface module 102, the motor drive module 103, the motor module 104, and the boost module 106, respectively. The external power supply 101 is configured to provide DC power with a charging voltage to the charging system 100; the charging interface module 102 is configured to provide a charging interface to the battery 105; the motor drive module 103 is configured to convert the DC power output from the charging interface module 102 into AC power and output the AC power to the motor module 104; the battery 105 is configured to receive DC power from the external power supply 101 through the charging interface module 102, i.e., direct charging mode; the battery 105 is also configured to receive power from the boost module 106 through the charging interface module 102. The DC power of the motor module 104 and the motor drive module 103 is in boost charging mode. The battery 105 is also configured to output DC power to the motor drive module through the charging interface module 102, i.e. driving mode. The boost module 106 is configured to convert the DC power with charging voltage provided by the external power source 101 into DC power with target voltage. The control charging module 107 is configured to control the charging interface module 102, the motor drive module 103, the motor module 104, and the boost module 106 to complete the charging process of the external power source 101 to the battery 105.

[0017] Specifically, when the charging voltage of the external power supply 101 is greater than or equal to the target voltage of the battery 105, the control charging module 107 enables the external power supply 101 to directly charge the battery 105 by closing the third relay 1022 and the fourth relay 1023 in the charging interface module 102. When the charging voltage of the external power supply 101 is less than the target voltage of the battery 105, the control charging module 107 disconnects the third relay 1022 and the fourth relay 1023 in the charging interface module 102. Then, the control charging module 107 controls the boost module 106, the motor module 104, and the motor drive module 103 to work together to achieve the boost charging function, so that the low-voltage external power supply 101 can also charge the high-voltage new energy vehicle.

[0018] The boost module 106 includes a first boost relay 1061, a second boost relay 1062, and a boost filter unit 1063. The first boost relay 1061 is connected to the neutral point 1041 in the motor module 104. The boost module 107 controls the boost charging function of the charging system 100 by closing the first boost relay 1061 and the second boost relay 1062, and controls the boost module 107 to achieve electrical isolation between the motor module 104 and the boost filter unit 1063 and the charging interface module 102 by disconnecting the first boost relay 1061 and the second boost relay 1062.

[0019] The problems that arise from doing this are: 1. Due to the high cost of high-voltage wiring harnesses, and the fact that the charging system 100 requires two high-voltage wiring harnesses to be drawn from the charging interface module 102 ( Figure 1 The wiring harnesses 108 and 109 in the system are connected to the boost module 106 to achieve boost charging function, thereby increasing the cost of the charging system 100.

[0020] 2. The boost filter unit 1063 in the boost module 106 needs to be configured separately, which increases the cost and size of the boost module 106.

[0021] 3. Two relays (first boost relay 1061 and second boost relay 1062) are required in the boost module 106 to realize the switching of the boost module 106, which also increases the cost and size of the boost module 106.

[0022] 4. The circuits of the motor drive module 103 and the boost module 106 are relatively independent, resulting in low product integration and power density of the charging system 100.

[0023] Based on the above problems, this application provides a motor control module 200, such as... Figure 2 As shown, the motor control module 200 includes a filter unit 201, a motor controller 202, and a boost circuit 203. The boost circuit 203 is connected to the motor controller 202 through the filter unit 201. The motor controller 202 and the boost circuit 203 share the high-voltage negative terminal 2021 of the motor controller 202. The boost circuit 203 is configured to provide boost function and to cooperate with the filter unit 201 to provide filtering function. The motor controller 203 is configured to provide motor drive function.

[0024] In specific implementation, the boost circuit 203 is connected to the motor controller 202 through the filter unit 201, avoiding the need for a separate boost filter unit 1063 to achieve the filtering function of the boost circuit 203 in related technologies. This also reduces the need for wiring harness 108, thereby reducing the cost and size of the boost circuit 203. The boost circuit 203 and the motor controller 202 share the high-voltage negative terminal 2021 of the motor controller 202, avoiding the need for a first boost relay 1061 in related technologies. This further reduces the cost and size of the boost circuit 203 and facilitates the integrated circuit design of the boost circuit 203 and the motor controller 202.

[0025] Through the above scheme, the boost circuit 203 in the motor control module 200 shares the high-voltage negative terminal 2021 of the motor controller 202, which facilitates the integrated circuit of the boost circuit 203 and the motor controller 202. The boost circuit 203 is connected to the motor controller 202 through the filter unit 201, and the filtering function of the boost circuit 203 is realized by reusing the filter unit 201. This avoids setting up an independent filter circuit in the boost circuit 203, and realizes a higher degree of integration of topology fusion and circuit function fusion of the motor control module 200, effectively reducing the hardware cost and size of the motor control module 200.

[0026] In some embodiments, such as Figure 2 As shown, the motor control module 200 also includes a DC interface 204 and a motor drive interface 205; The boost circuit includes: a first capacitor 2031, a second capacitor 2032, a first inductor 2033, and a first relay 2034. One end of the first capacitor 2031 is connected to the high-voltage negative terminal 2021, and the other end of the first capacitor 2031 is connected to the first relay 2034 and the first inductor 2033. One end of the second capacitor 2032 is connected to the filter unit 201, and the other end of the second capacitor 2032 is connected to the first inductor 2033. One end of the first inductor 2033 is connected to the second capacitor 2032 and the charging interface module, and the other end of the first inductor 2033 is connected to the first capacitor 2031 and the first relay 2034. One end of the first relay 2034 is connected to the first inductor 2033 and the first capacitor 2031, and the other end of the first relay 2034 is connected to the motor module. The motor controller 202 includes: a high-voltage negative terminal 2021, a high-voltage positive terminal 2022, and a three-phase bridge circuit 2023, wherein the three-phase bridge circuit 2023 includes a plurality of switching transistors 20231, and the plurality of switching transistors 20231 are configured to increase the DC voltage by alternating operation. The filter unit 201 includes a second inductor 2011, a third inductor 2012, a third capacitor 2013, and a fourth capacitor 2014. One end of the second inductor 2011 is connected to the first capacitor 2011, the fourth capacitor 2014, and the high-voltage negative terminal 2021. The other end of the second inductor 2011 is connected to the third capacitor 2013 and the DC interface 204. One end of the third inductor 2012 is connected to the third capacitor 2013 and the DC interface 204. The other end of the third inductor 2012... One end of the third capacitor 2013 is connected to the fourth capacitor 2014 and the high-voltage positive terminal 2022. One end of the third capacitor 2013 is connected to the second inductor 2011 and the DC interface 204. The other end of the third capacitor 2013 is connected to the third inductor 2012 and the DC interface 204. One end of the fourth capacitor 2014 is connected to the third inductor 2012 and the high-voltage positive terminal 2022. The other end of the fourth capacitor 2014 is connected to the second inductor 2011, the first capacitor 2031 and the high-voltage negative terminal 2021.

[0027] In a specific implementation, the second inductor 2011 in the filter unit 201 can form a common-mode filter circuit in the boost circuit 203. In this way, the filter circuit and boost filter circuit 1063 in the motor drive module 103, which are independent in the related technology, are deeply integrated, so that the filter circuit and boost filter circuit 1063 in the independent motor drive module 103 are integrated into a three-phase integrated circuit.

[0028] By implementing the above solution and setting up a common-mode filter circuit, the need for a separate filter circuit in the boost circuit is avoided. This achieves a higher degree of integration in the topology and circuit functions of the motor control module, effectively reducing the hardware cost and size of the motor control module 200.

[0029] In some embodiments, the switching state of the first relay 2034 is determined according to the battery's operating mode, wherein the operating mode includes at least: driving mode, direct charging mode, boost charging mode, and buck discharging mode.

[0030] In specific implementation, in driving mode, the first relay 2034 is open, allowing the battery to provide AC drive voltage to the motor module through the filter unit 201 and the motor controller 202. In direct charging mode, the first relay 2034 is open, allowing external power to directly charge the battery through the charging interface unit, and the filter unit 201, motor controller 202, and boost circuit 203 are all inactive. In boost charging mode, the first relay 2034 is on, causing the filter unit 201, motor controller 202, boost circuit 203, and motor module to work together to achieve boost charging of the battery. In buck charging mode, the first relay 2034 is on, causing the filter unit 201, motor controller 202, boost circuit 203, and motor module to work together to achieve buck discharging of the battery.

[0031] The above scheme determines the switching state of the first relay 2034 in the boost circuit 203 by the battery's operating mode, so that the motor control module 200 can adapt to different battery operating modes.

[0032] In some embodiments, the first inductor 2033, the second inductor 2011, the first capacitor 2031, and the filter unit 201 are configured to provide DC filtering functionality in the boost charging mode and the buck discharging mode; the filter unit 201 is configured to provide DC filtering functionality in the driving mode.

[0033] In specific implementation, the second inductor 2011 in the filter unit 201 can form a common-mode filter circuit in the boost circuit 203, allowing the boost circuit 203 and the filter unit 201 to work together to provide filtering functions for different battery operating modes. When the battery is in boost charging mode or buck charging mode, the boost circuit 203 and the filter unit 201 work together, with the first inductor 2033, the second inductor 2011, and the first capacitor 2031 forming a common-mode filter circuit. This common-mode filter circuit integrates the filter unit 201 into a three-phase integrated filter circuit, providing DC filtering functions for both boost charging and buck discharging modes. When the battery is in driving mode, the boost circuit 203 does not work, and the filter unit 201 provides DC filtering functions for driving mode. When the battery is in direct charging mode, the filter unit 201, the motor controller 202, and the boost circuit 203 all do not work, and the motor control module 200 does not need to provide DC filtering functions.

[0034] By implementing the above scheme and setting up a common-mode filter circuit, the need for a separate filter circuit in the boost circuit is avoided. This allows the boost circuit 203 and the filter unit 201 to work together to achieve filtering under different battery operating modes. This results in a higher degree of integration in the topology and circuit functions of the motor control module, effectively reducing the hardware cost and size of the motor control module 200.

[0035] Based on the same inventive concept, this embodiment proposes a charging device that includes the motor control module described in the above embodiments.

[0036] like Figure 3 As shown, the charging device 300 includes: a charging interface module 102, a motor module 104, a control module 301, and a motor control module 200; The charging interface module 102 is connected to the external power supply 101, the battery 105 and the motor control module 200 respectively, and the charging interface module 102 is configured to provide an interface to the external power supply 101 and the battery 105. The motor module 104 is connected to the motor control module 200, wherein the motor control module 200 is configured to provide boost and filtering functions, and the motor module 104 is configured to provide an energy storage inductor to the motor control module 200. The control module 301 is connected to the charging interface module 102, the motor control module 200, and the motor module 104 respectively. The control module 301 is configured to control the charging interface module 102, the motor control module 200, and the motor module 104, so that the external power supply 101 can perform boost charging and direct charging of the battery 105.

[0037] In practice, the motor control module 200 is connected to the charging interface module 102 and the motor module 104, so that the control module 301 controls the boost and filtering functions of the motor control module 200 in different working modes of the battery 105.

[0038] Specifically, in the implementation of the boost function of the motor control module 200, the circuit used to provide the boost function includes: input filtering, energy storage inductor, switching transistor, and output filtering. The input filtering may include the second capacitor 2032 in the motor control module 200; the energy storage inductor may be reused from the motor module 104; the switching transistor may include the three-phase bridge circuit 2023; and the output filtering may include the fourth capacitor 2014 in the motor control module 200. In the implementation of the filtering function of the motor control module 200, the boost circuit 203 and the filtering unit 201 work together. A common-mode filter circuit is formed by the first inductor 2033, the second inductor 2011, and the first capacitor 2031. The common-mode filter circuit integrates the filtering unit 201 into a three-phase integrated filter circuit, which provides DC filtering functionality in different operating modes of the battery 105.

[0039] The above solution achieves the filtering function of the boost circuit 203 by using the multiplexed filter unit 201, and then achieves the boost and filtering functions of the charging device 300 by using the motor control module 200. This avoids setting up a separate filter circuit in the boost circuit 203, and realizes a higher degree of integration in the topology fusion and circuit function fusion of the charging device 300. This effectively reduces the hardware cost of the charging device 300, reduces the size of the charging device 300, and improves the market competitiveness of the charging device 300.

[0040] In some embodiments, the charging interface module 102 includes: a second relay 1021, a third relay 1022, a fourth relay 1023, a fifth relay 1024, a sixth relay 1025, a seventh relay 1026, a positive interface 1027, and a negative interface 1028. The two ends of the second relay 1021 are respectively connected to the positive terminal of the external power supply 101 and the boost circuit 203. The two ends of the third relay 1022 are respectively connected to the positive terminal of the battery 105 and the positive terminal of the external power supply 101. The fourth relay 1023, the fifth relay 1024, the sixth relay 1025, the seventh relay 1026, a positive interface 1027, and a negative interface 1028. The two ends of 23 are respectively connected to the negative terminal of the battery 105 and the negative terminal of the external power supply 101. The two ends of the fifth relay 1024 are respectively connected to the positive terminal of the battery 105 and the positive terminal interface 1027. The two ends of the sixth relay 1025 are respectively connected to the positive terminal of the battery 105 and the positive terminal interface 1027. The two ends of the seventh relay 1026 are respectively connected to the negative terminal of the battery and the negative terminal interface 1028. The positive terminal interface 1027 and the negative terminal interface 1028 are connected to the DC interface 204 in the motor control module 200.

[0041] In specific implementation, the direct charging mode of battery 105 is achieved by connecting the third relay 1022 and the fourth relay 1023 in the charging interface module 102; the driving mode of battery 105 is achieved by connecting the fifth relay 1024, the sixth relay 1025 and the seventh relay 1026; the boost charging mode of battery 105 is achieved by connecting the first relay 2034, the second relay 1021, the fourth relay 1023, the fifth relay 1024, the sixth relay 1025 and the seventh relay 1026; and the buck discharging mode of battery 105 is achieved by connecting the first relay 2034, the second relay 1021, the fourth relay 1023, the fifth relay 1024, the sixth relay 1025 and the seventh relay 1026.

[0042] Through the above scheme, different working modes of battery 105 are realized by controlling multiple relays in charging interface module 102 and motor control module 200.

[0043] In some embodiments, the motor module 104 includes a three-phase motor winding 1042, a neutral point 1041, and a three-phase motor interface 1043. The three-phase motor winding 1042 is configured to provide an energy storage inductor to the motor control module 200. The neutral point 1041 is connected to the first relay 2034, and the three-phase motor interface 1043 is connected to the motor drive interface 205 in the motor control module 200.

[0044] In practice, the three-phase motor winding 1042 can be used as an energy storage inductor when the motor control module 200 provides a boost function.

[0045] The above solution provides an energy storage inductor for the charging device 300 to achieve the boost function.

[0046] In some embodiments, the motor control module 200 and the motor module 104 are configured to construct a three-phase boost circuit for the battery 105 in a boost charging mode.

[0047] In specific implementation, during the boost function implementation of the motor control module 200, the circuit used to provide the boost function includes: input filtering, energy storage inductor, switching transistor and output filtering. The input filtering may include the second capacitor 2032 in the motor control module 200; the energy storage inductor may be reused from the motor module 104; the switching transistor may include the three-phase bridge circuit 2023; and the output filtering may include the fourth capacitor 2014 in the motor control module 200.

[0048] The above solution provides a three-phase boost circuit for the charging device 300 to achieve the boost function.

[0049] Based on the same inventive concept, this embodiment proposes a method for controlling the charging of the charging device described in the above embodiments.

[0050] like Figure 4a As shown, the charging device includes: a charging interface module, a motor control module, a motor module, and a control module; the method includes: Step 401: The control module obtains the charging voltage of the external power supply and the target voltage of the battery.

[0051] In this step, communication can be established between the external power source and the charging device to obtain the charging voltage of the external power source and the target voltage of the battery.

[0052] The above scheme provides a basis for judging whether to perform boost charging or direct charging of the battery.

[0053] Step 402: In response to determining that the charging voltage is less than the target voltage, the control module controls multiple relays in the charging interface module and multiple relays in the motor control module to turn on or off, and controls multiple switching transistors in the motor control module to work alternately, to complete the boost charging process of the battery.

[0054] In this step, when the charging voltage is less than the target voltage, the charging device enters the boost charging mode. First, the sixth and seventh relays are closed to charge the voltage of the first and fourth capacitors to near the target voltage. Then, the sixth relay is opened and the fifth relay is closed to complete the high-voltage soft start of the battery and the fourth capacitor. Then, the first relay is closed to precharge the front-end capacitors (first and second capacitors) of the boost circuit. At this time, the boost circuit works in reverse buck mode. When the voltage of the front-end capacitors of the boost circuit reaches the predetermined value, the precharging stops. At this time, the external power supply is started, and the charging device enters the normal boost charging state.

[0055] Specifically, in the boost charging state of the charging device, such as Figure 4b As shown, DC is the DC voltage of the first capacitor. When the lower transistor of the three-phase bridge circuit is turned on, the inductance in the three-phase motor winding stores energy. When the lower transistor is turned off, the inductor current charges the battery through the upper transistor. There are two control methods for the switching transistors: in-phase control and phase-shifting control. In in-phase mode, the lower and upper transistors of the three-phase bridge turn on and off simultaneously. In phase-shifting mode, the lower transistor drive signal of the three-phase bridge switches alternately, with a fixed phase shift angle. Figure 4c As shown, the signals from the upper and lower transistors are complementary.

[0056] The control module has two control objectives: output voltage and input current. The output voltage V... outThe voltage needs to be controlled slightly above the target voltage to ensure that charging current flows into the battery. The input current control needs to meet two objectives: firstly, the current of each phase needs to be controlled according to a specific value to ensure that the motor module does not generate torque in boost charging mode, thereby causing the vehicle to move; secondly, the sum of the three-phase input currents must meet the requirements of the control module (e.g., BMS, Battery Management System).

[0057] In the above scheme, the control module controls multiple relays and multiple switching transistors to work based on the target voltage in the battery boost charging process, providing control signals for the battery boost charging process and realizing the boost charging control of the charging device.

[0058] Step 403: In response to determining that the charging voltage is greater than or equal to the target voltage, the control module controls multiple relays in the charging interface module to turn on or off to complete the direct charging process of the battery.

[0059] In this step, the control module controls the third and fourth relays in the charging interface module to activate, enabling the direct charging process of the battery.

[0060] In the above scheme, the control module controls multiple relays to work based on the direct charging conditions of the battery, providing relay control signals for the direct charging process of the battery, and realizing the direct charging control of the charging device.

[0061] The above scheme, by controlling a charging device with higher integration of topology and circuit functions, achieves boost charging and direct charging control of batteries, thereby improving the market competitiveness of the charging device.

[0062] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method of controlling the charging device to charge as described in any of the above embodiments.

[0063] Figure 5 This embodiment illustrates a more specific hardware structure of an electronic device. The device may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0064] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0065] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0066] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0067] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0068] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0069] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0070] The electronic devices described above are used to implement the charging method of the corresponding charging device in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0071] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method of controlling the charging device to charge as described in any of the above embodiments.

[0072] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0073] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the method of controlling the charging device to charge as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0074] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a vehicle device, including the charging device in the above embodiments, and the method for controlling the charging device to charge as described in any embodiment of the vehicle device.

[0075] The vehicle equipment of the above embodiments is used to execute the method of controlling the charging device to charge as described in any of the above embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0076] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0077] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0078] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0079] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A motor control module, characterized in that, The motor control module includes a filter unit, a motor controller, and a boost circuit; the boost circuit is connected to the motor controller through the filter unit, and the motor controller and the boost circuit share the high-voltage negative terminal of the motor controller; the boost circuit is configured to provide boost function and, in conjunction with the filter unit, provide filtering function; the motor controller is configured to provide motor drive function. The motor control module also includes a DC interface and a motor drive interface; The boost circuit includes: a first capacitor, a second capacitor, a first inductor, and a first relay. One end of the first capacitor is connected to the high-voltage negative terminal, and the other end of the first capacitor is connected to the first relay and the first inductor. One end of the second capacitor is connected to the filter unit, and the other end of the second capacitor is connected to the first inductor. One end of the first inductor is connected to the second capacitor and the charging interface module, and the other end of the first inductor is connected to the first capacitor and the first relay. One end of the first relay is connected to the first inductor and the first capacitor, and the other end of the first relay is connected to the motor module. The motor controller includes: a high-voltage negative terminal, a high-voltage positive terminal, and a three-phase bridge circuit, wherein the three-phase bridge circuit includes multiple switching transistors, and the multiple switching transistors are configured to increase the DC voltage by alternating operation; The filtering unit includes a second inductor, a third inductor, a third capacitor, and a fourth capacitor. One end of the second inductor is connected to the first capacitor, the fourth capacitor, and the high-voltage negative terminal; the other end of the second inductor is connected to the third capacitor and the DC interface. One end of the third inductor is connected to the third capacitor and the DC interface; the other end of the third inductor is connected to the fourth capacitor and the high-voltage positive terminal. One end of the third capacitor is connected to the second inductor and the DC interface; the other end of the third capacitor is connected to the third inductor and the DC interface. One end of the fourth capacitor is connected to the third inductor and the high-voltage positive terminal; the other end of the fourth capacitor is connected to the second inductor, the first capacitor, and the high-voltage negative terminal.

2. The motor control module as described in claim 1, characterized in that, The switching state of the first relay is determined according to the battery's operating mode, which includes at least: driving mode, direct charging mode, boost charging mode, and buck discharging mode.

3. The motor control module as described in claim 2, characterized in that, The first inductor, the second inductor, the first capacitor, and the filter unit are configured to provide DC filtering functionality in the boost charging mode and the buck discharging mode. The filtering unit is configured to provide DC filtering functionality in the driving mode.

4. A charging device, characterized in that, include: The charging interface module, the motor module, the control module, and the motor control module as described in any one of claims 1 to 3; The charging interface module is connected to the external power supply, the battery and the motor control module respectively, and the charging interface module is configured to provide an interface to the external power supply and the battery. The motor module is connected to the motor control module, wherein the motor control module is configured to provide boost and filtering functions, and the motor module is configured to provide an energy storage inductor to the motor control module; The control module is connected to the charging interface module, the motor control module, and the motor module respectively. The control module is configured to control the charging interface module, the motor control module, and the motor module so that the external power supply can perform boost charging and direct charging of the battery.

5. The charging device as described in claim 4, characterized in that, The charging interface module includes: a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, a positive interface, and a negative interface. The two ends of the second relay are respectively connected to the positive terminal of the external power supply and the boost circuit. The two ends of the third relay are respectively connected to the positive terminal of the battery and the positive terminal of the external power supply. The two ends of the fourth relay are respectively connected to the negative terminal of the battery and the negative terminal of the external power supply. The two ends of the fifth relay are respectively connected to the positive terminal of the battery and the positive interface. The two ends of the sixth relay are respectively connected to the positive terminal of the battery and the positive interface. The two ends of the seventh relay are respectively connected to the negative terminal of the battery and the negative interface. The positive interface and the negative interface are connected to the DC interface in the motor control module.

6. The charging device as described in claim 4, characterized in that, The motor module includes: a three-phase motor winding, a neutral point, and a three-phase motor interface. The three-phase motor winding is configured to provide an energy storage inductor to the motor control module. The neutral point is connected to a first relay. The three-phase motor interface is connected to a motor drive interface in the motor control module.

7. The charging device as claimed in claim 4, characterized in that, The motor control module and the motor module are configured to construct a three-phase boost circuit for the battery in boost charging mode.

8. A method for controlling the charging of a charging device, characterized in that, The method is applied to the charging device as described in any one of claims 4 to 7, the charging device comprising: a charging interface module, a motor control module, a motor module, and a control module, the method comprising: The control module obtains the charging voltage of the external power supply and the target voltage of the battery; In response to determining that the charging voltage is less than the target voltage, the control module controls multiple relays in the charging interface module and multiple relays in the motor control module to turn on or off, and controls multiple switching transistors in the motor control module to work alternately, thereby completing the boost charging process of the battery. In response to determining that the charging voltage is greater than or equal to the target voltage, the control module controls multiple relays in the charging interface module to turn on or off, thereby completing the direct charging process of the battery.

9. A vehicle, characterized in that, Includes the charging device as described in any one of claims 4 to 7.

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