Boost charging control method, circuit, device, equipment and storage medium

Abstract

The present application discloses a boost charging control method, a boost charging circuit, an apparatus, a device and a storage medium; the method is applied to a boost charging circuit, the circuit includes a motor, a motor controller, a battery pack and a boost charging switch, one end of the boost charging switch is connected to a charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller, the method includes: obtaining the effective value of the electrical signal output by each of the other two phases of the motor in each of multiple stages of the boost charging process; determining the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase; generating a corresponding phase PWM wave of the corresponding stage based on the execution duty cycle value of each phase of each stage, and the waveforms of the PWM waves of the other two phases are staggered by 180 degrees; based on the PWM wave of each of the other two phases of each stage, using the motor controller to drive the other two phases of the motor to perform boost charging control on the vehicle in the corresponding stage.

Description

Technical Field

[0001] The present application relates to the technical field of boost charging, and in particular to a boost charging control method, circuit, device, equipment and storage medium. Background Art

[0002] At present, new energy electric vehicles are becoming more and more popular, with a higher and higher market share. Charging anxiety is an industry problem that comes with it. For charging anxiety, the charging power can be continuously improved to shorten the charging time and reduce the anxiety of car owners. The two directions to improve the charging power are to increase the charging current and to increase the charging voltage. Due to the standardization of the charging port, the charging current cannot be increased indefinitely. Therefore, the development trend of vehicles on high-voltage platforms such as 800V is prominent, and the charging power is increased by increasing the charging voltage to shorten the charging time. However, due to the early development of the market, the voltage of vehicles was mainly below 450V, and the voltage of the corresponding DC charging piles was mainly below 500V. The actual distribution ratio has not been ignored since its development, which brings voltage incompatibility problems to the charging of vehicles on the 800V high-voltage platform. Summary of the invention

[0003] Based on the above problems, the embodiments of the present application provide a boost charging control method, a boost charging circuit, an apparatus, a device and a storage medium.

[0004] The technical solution provided by the embodiment of the present application is as follows:

[0005] The embodiment of the present application first provides a boost charging control method, which is applied to a boost charging circuit. The circuit includes a motor, a motor controller, a battery pack and a boost charging switch. The positive and negative electrodes of the battery pack are respectively connected to the positive and negative electrodes of the motor controller. One end of the boost charging switch is connected to the charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller. The method includes: obtaining the effective value of the electrical signal output by each of the other two phases of the motor in each of multiple stages of the boost charging process; determining the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase; generating a corresponding phase PWM wave of the corresponding stage based on the execution duty cycle value of each phase of each stage, and the waveforms of the PWM waves of the other two phases are staggered by 180 degrees; based on the PWM wave of each of the other two phases of each stage, using the motor controller to drive the other two phases of the motor to perform boost charging control on the vehicle in the corresponding stage.

[0006] An embodiment of the present application also provides a boost charging circuit, which includes: a motor, a motor controller, a battery pack and a boost charging switch, wherein: the positive and negative poles of the battery pack are respectively connected to the positive and negative poles of the motor controller, one end of the boost charging switch is connected to the charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller.

[0007] An embodiment of the present application also provides a boost charging control device, which includes: an acquisition module, which is used to acquire the effective value of the electrical signal output by each of the two phases of the motor in each of the multiple stages of the boost charging process; a determination module, which is used to determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase; a generation module, which is used to generate a PWM wave of each phase of the corresponding stage based on the execution duty cycle value of each phase of each stage, and the waveforms of the PWM waves of the two phases are staggered by 180 degrees; a control module, which is used to drive the two phases of the motor to perform boost charging control on the vehicle in the corresponding stage based on the PWM wave of each phase of the two phases of each stage using the motor controller.

[0008] An embodiment of the present application also provides an electronic device, which includes a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the steps in the boost charging control method described in the embodiment of the present application are implemented.

[0009] The embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the boost charging control method described in the embodiment of the present application are implemented.

[0010] In the embodiment of the present application, two-phase interleaved control is used to reduce the current ripple of boost charging, improve the boost charging efficiency and power, and reduce the parameter requirements for the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic flow chart of a boost charging control method according to an embodiment of the present application;

[0012] Figure 2 A schematic diagram of a boost charging circuit according to an embodiment of the present application;

[0013] Figure 3 A boost charging control waveform diagram of the related technology;

[0014] Figure 4 This is a boost charging control waveform diagram of an embodiment of the present application;

[0015] Figure 5 It is a flowchart of another boost charging control method according to an embodiment of the present application;

[0016] Figure 6 This is another boost charging control waveform diagram of an embodiment of the present application;

[0017] Figure 7 A schematic diagram of a corresponding relationship curve between a desired duty cycle and an executed duty cycle according to an embodiment of the present application;

[0018] Figure 8 This is another boost charging control waveform diagram of the embodiment of the present application;

[0019] Fig. 9 A flowchart of another boost charging control method according to an embodiment of the present application;

[0020] Fig.10 A schematic flow chart of another boost charging control method according to an embodiment of the present application;

[0021] Fig.11 This is another schematic diagram of a corresponding relationship curve between a desired duty cycle and an executed duty cycle according to an embodiment of the present application;

[0022] Fig.12 A flowchart of a boost charging control method according to an embodiment of the present application is provided;

[0023] Fig.13 A schematic diagram of a corresponding relationship curve between another desired duty cycle and an executed duty cycle according to an embodiment of the present application;

[0024] Fig.14 A flowchart of a boost charging control method according to an embodiment of the present application is provided;

[0025] Fig.15 This is a schematic diagram of the structure of a boost charging control device according to an embodiment of the present application;

[0026] Fig.16 This is a schematic diagram of the composition structure of another boost charging control device according to an embodiment of the present application;

[0027] Fig.17 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] Figure 11 is a flow chart of a boost charging control method according to an embodiment of the present application, wherein the method is applied to a boost charging circuit, wherein the circuit comprises a motor, a motor controller, a battery pack and a boost charging switch, wherein the positive and negative electrodes of the battery pack are respectively connected to the positive and negative electrodes of the motor controller, one end of the boost charging switch is connected to the charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller, such as Figure 1 As shown, the method comprises the following steps:

[0030] Step 102: Obtaining the effective value of the electrical signal output by each of the other two phases of the motor in each of the multiple stages of the boost charging process;

[0031] Among them, since many passenger car companies are developing 800V platform models to improve the charging power of the whole vehicle, although the charging power is greatly improved after the voltage is increased, it is limited by the public charging piles of about 400V on the market. 800V models are not compatible with charging piles of about 400V, and the charging compatibility and convenience will be greatly reduced. Therefore, the whole vehicle needs to add a 400V to 800V boost charging circuit to be compatible with 400V charging piles.

[0032] like Figure 2 As shown, the boost charging circuit 20 of the vehicle includes: a battery pack 21, a motor controller 22, a motor 23, a first boost charging switch 24, a second boost charging switch 25 and a capacitor 26, wherein the battery pack 21 is directly connected to the high-voltage positive and negative electrodes of the motor controller 22, one end of the first boost charging switch 24 is connected to the DC fast charging pile 27, and the other end is connected to one of the three phases of the motor 23 and the motor controller 22; in the case of normal direct charging, the first boost charging switch 24 is disconnected and the second boost charging switch 25 is closed, so that the charging current can be output from the DC fast charging pile 27 to the battery pack 21.

[0033] When boost charging is required, the first boost charging switch 24 is closed, the second boost charging switch 25 is opened, and the DC fast charging pile 27 can provide DC power to the motor 23 and the motor controller 22. The motor controller 22 controls the other two phases that are not connected to the first boost charging switch 24 to perform boost charging control, so that the DC energy provided by the DC fast charging pile 27 can be delivered to the battery pack 21. Since the output voltage of the DC fast charging pile is lower than the battery pack voltage in this case, this charging method is also called boost charging.

[0034] Among them, the three phases of the motor can include U phase, V phase and W phase. The other end of the first boost charging switch 24 can be connected to any phase of the three phases of the motor 23 and the motor controller 22, so that the motor controller 22 can control the other two phases not connected to the first boost charging switch 24 for boost charging control. For example, the other end of the first boost charging switch 24 is connected to the V phase of the three phases of the motor 23 and the motor controller 22, so that the motor controller 22 can control the U phase and W phase not connected to the first boost charging switch 24 for boost charging control.

[0035] Among them, the boost charging process includes multiple stages, the electrical signal command value of each stage may be different, and the corresponding execution duty cycle value of each phase is different. The electrical signal sampling value output by each phase can be obtained, and the effective value of the electrical signal can be determined based on the electrical signal sampling value.

[0036] Step 104: determining the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase and the effective value of the electrical signal of the corresponding phase in each stage;

[0037] Among them, the duty cycle is a parameter that describes the characteristics of a pulse signal. It is used to measure the ratio of the duration of a high level or a low level to the entire cycle time within a signal cycle. The duty cycle can be used to adjust the size of the effective value of the electrical signal during the boost charging process.

[0038] Step 106: generating a PWM wave of a corresponding phase of a corresponding stage based on the duty cycle value of each phase of each stage, wherein the waveforms of the PWM waves of the other two phases are staggered by 180 degrees;

[0039] Among them, different PWM (Pulse Width Modulation) waves can be generated according to the size of the duty cycle.

[0040] Step 108: Based on the PWM wave of each phase in the other two phases of each stage, the motor controller is used to drive the other two phases of the motor to perform boost charging control on the vehicle in the corresponding stage.

[0041] In related technologies, such as Figure 3 As shown, using Figure 2The boost charging circuit shown in the figure assumes that the phase connected to the first boost charging switch 24 is the V phase. At this time, the control waveform 31 of the PWM wave of the U phase is completely synchronized with the control waveform 32 of the PWM wave of the W phase, and the current 33 of the V phase is equal to twice the current of the U phase or the W phase, which is the total boost charging current. The boost charging current on the V phase presents a triangular wave shape as the U phase or the W phase switches. The frequency of the triangular wave is consistent with the switching frequency of the U / W phase, and the ripple current is relatively high. At this time, the maximum boost charging power is limited by the copper loss of the V phase winding, that is, P = I*I*R, where P is the boost charging power, I is the equivalent current, and R is the resistance. Under the same heating power, due to the high ripple current, the equivalent current is low, and the boost charging efficiency and power are low.

[0042] In the present application embodiment, Figure 4 As shown, using Figure 2 The boost charging circuit shown in the figure assumes that the phase connected to the first boost charging switch 24 is the V phase. At this time, the control waveform 41 of the PWM wave of the U phase and the control waveform 42 of the PWM wave of the W phase are interlaced with each other, and the phase difference is 180°. In the U phase or W phase waveform in the figure, the number 0 indicates that the lower bridge arm is turned on, and the number 1 indicates that the upper bridge arm is turned on. The current 43 of the V phase is equal to twice the U phase or W phase current, which is the total boost charging current. The boost charging current of the V phase is also in the form of a triangular wave, but because the U phase and W phase control waveforms are interlaced, the frequency of the triangular wave is twice the switching frequency of the U / W phase. Under the same switching frequency, the effect of doubling the V phase current frequency can be achieved, and the V phase current ripple can be reduced to half. Under the same heating power, due to the low ripple current, the equivalent current is higher, and the boost charging efficiency and power are higher.

[0043] In the embodiment of the present application, two-phase interleaved control is used to reduce the current ripple of boost charging, improve the boost charging efficiency and power, and reduce the parameter requirements for the capacitor.

[0044] In some embodiments, Figure 5 As shown, the other two phases include the second phase and the third phase, and step 104 "determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase and the effective value of the electrical signal of the corresponding phase in each stage" includes the following steps:

[0045] Step 1041: determining the expected duty cycle value of the corresponding stage based on the command value of each phase electrical signal and the effective value of the corresponding phase electrical signal of each stage;

[0046] Step 1042: when the expected duty cycle value of any stage is within a preset range, based on the expected duty cycle value of the corresponding stage, determining the execution duty cycle values ​​of the two phases of the corresponding stage, wherein the execution duty cycle values ​​of the two phases are different;

[0047] The preset range may be 50%, or around 50%, such as 40% to 60%, 45% to 55%, 46% to 54%, etc., and the equivalent execution duty cycle values ​​of the execution duty cycle values ​​of the two phases are equal to the expected duty cycle.

[0048] In the present application embodiment, Figure 6 As shown, using Figure 2 In the boost charging circuit shown, the control waveform 51 of the PWM wave of the U phase and the control waveform 52 of the PWM wave of the W phase are interlaced with each other, with a phase difference of 180°. When the execution duty ratios of the U phase and the W phase are both 50%, the switching of the U phase and the W phase will be performed simultaneously. In the waveform of the U phase or the W phase in the figure, the number 0 indicates that the lower bridge arm is turned on, and the number 1 indicates that the upper bridge arm is turned on. The current 53 of the V phase is equal to twice the current of the U phase or the W phase, which is the total current of the boost charging.

[0049] Due to the adoption Figure 2 In the boost charging circuit, the potential of the neutral point will be affected by both the U phase and the W phase. When the U phase switches from 0 to 1, the neutral point potential will rise, while when the W phase switches from 1 to 0, the neutral point potential will drop. The simultaneous switching will cause the neutral point potential to oscillate, and the U phase and W phase potentials will also oscillate. The oscillation at this time will lead to enhanced radiation and even component damage in some cases. Therefore, this problematic waveform needs to be avoided.

[0050] Figure 7 Schematic diagram of the expected duty cycle VS the executed duty cycle curve without performing duty cycle conversion in the embodiment of the present application, such as Figure 7 As shown, at any point on the curve 61, the expected duty cycle is equal to the executed duty cycle, and the circled area 611 in the figure is Figure 6 The problem area (i.e. the preset range).

[0051] Therefore, the duty cycle values ​​of the U phase and the W phase can also be set to different values, so as to achieve the same equivalent control effect while avoiding the simultaneous switching of the U phase and the W phase, thereby avoiding the oscillation of the neutral point potential.

[0052] The following steps 1043 and 1044 are cyclically executed in multiple switching cycles of each stage until the corresponding stage ends:

[0053] Step 1043: In the current switching cycle of each stage, determining the execution duty cycle value of the second phase to be the first execution duty cycle, and determining the execution duty cycle value of the third phase to be the second execution duty cycle;

[0054] Step 1044: In the next switching cycle of each stage, determine the execution duty cycle value of the second phase to be the second execution duty cycle, and determine the execution duty cycle value of the third phase to be the first execution duty cycle.

[0055] In the present application embodiment, Figure 8 As shown, using Figure 2 The boost charging circuit shown in the figure assumes that the phase connected to the first boost charging switch 24 is the V phase. At this time, the control waveform 71 of the U phase PWM wave and the control waveform 72 of the W phase PWM wave are interlaced with each other, with a phase difference of 180°. In the U phase or W phase waveform in the figure, the number 0 indicates that the lower bridge arm is turned on, and the number 1 indicates that the upper bridge arm is turned on. The current 73 of the V phase is equal to twice the U phase or W phase current, which is the total boost charging current. The boost charging current of the V phase is also in the form of a triangular wave. The original desired duty cycle value (for example, 50%) is transformed in each switching cycle to obtain the execution duty cycle. For example, in this cycle, the U phase is 48%, the W phase is 52%, and the next cycle, the U phase is 52%, and the W phase is 48%. While achieving the same equivalent control effect, it avoids the simultaneous switching of the U phase and the W phase. From Figure 8 It can be seen from the waveform that the execution duty cycle of the U phase and the W phase changes alternately, but the equivalent duty cycle is still the expected duty cycle (50%), avoiding the neutral point potential oscillation phenomenon.

[0056] In the embodiment of the present application, when the expected duty cycle is within the preset range, pre-processing is performed near the staggered duty cycle to avoid voltage oscillation caused by simultaneous switching of the two-phase switches when the two-phase control waveform is staggered, thereby improving EMC performance and avoiding failure.

[0057] In some embodiments, Fig. 9 As shown, the method further includes: Step 1045: when the expected duty cycle value of each stage is not within the preset range, the expected duty cycle value of the corresponding stage is determined as the execution duty cycle value of each phase of the corresponding stage.

[0058] like Figure 7 As shown, since the expected duty cycle is not within the preset range, the switching of the U phase and the W phase will not be performed simultaneously, which can avoid the neutral point potential oscillation. At any point outside the circle area 611 of the curve 61, the expected duty cycle is equal to the execution duty cycle.

[0059] In an embodiment of the present application, when the expected duty cycle is not within the preset range, the switching of the U phase and the W phase will not be performed simultaneously, so as to avoid the oscillation of the neutral point potential. At this time, the expected duty cycle is equal to the execution duty cycle, which meets the requirements of boost charging control; through the two-phase staggered control, the current ripple of the boost charging is reduced, the boost charging efficiency and power are improved, and the parameter requirements for the capacitor are reduced.

[0060] In some embodiments, Fig.10As shown, the boost charging process includes a first sub-process and a second sub-process after the first sub-process, the first sub-process includes a first stage and a second stage after the first stage, and the second sub-process includes a third stage and a fourth stage after the third stage;

[0061] Step 1042 “determine the execution duty cycle values ​​of the two phases of the corresponding stage based on the expected duty cycle value of the corresponding stage when the expected duty cycle value of any stage is within the preset range” includes the following steps:

[0062] Step 10421: when the expected duty cycle values ​​of the first stage and the second stage are both within a preset range, determining a first execution duty cycle and a second execution duty cycle of the first stage based on the first expected duty cycle value of the first stage;

[0063] Step 10422: determining a third execution duty cycle and a fourth execution duty cycle of the second stage based on the second expected duty cycle value of the second stage; wherein the first execution duty cycle and the third execution duty cycle are the same, and the second execution duty cycle and the fourth execution duty cycle are different;

[0064] Step 10423: when the expected duty cycle values ​​of the third stage and the fourth stage are both within a preset range, determining a fifth execution duty cycle and a sixth execution duty cycle of the third stage based on the third expected duty cycle value of the third stage;

[0065] Step 10424: Based on the fourth expected duty cycle value of the fourth stage, determine the seventh execution duty cycle and the eighth execution duty cycle of the fourth stage; wherein the fifth execution duty cycle and the seventh execution duty cycle are different, and the sixth execution duty cycle and the eighth execution duty cycle are the same.

[0066] like Fig.11 As shown, in the problem area near the 50% duty cycle, the duty cycle is transformed, and any desired duty cycle in the area is changed into two execution duty cycles D_l and D_s, corresponding to Fig.11 The middle-section dotted line 81 and the dotted dotted line 82, D_l corresponds to a certain period of the U phase and executes the duty cycle, D_s corresponds to the period of the W phase and executes the duty cycle, then D_s corresponds to the next period of the U phase and executes the duty cycle, and D_l corresponds to the next period of the W phase and executes the duty cycle; or D_l corresponds to a certain period of the W phase and executes the duty cycle, D_s corresponds to the period of the U phase and executes the duty cycle, D_s corresponds to the next period of the W phase and executes the duty cycle, and D_l corresponds to the next period of the U phase and executes the duty cycle.

[0067] Take D_1 corresponding to a certain period of the U phase to execute the duty cycle, and D_s corresponding to the period of the W phase to execute the duty cycle as an example for explanation. Fig.11 As shown, when the expected duty cycle changes, the W-phase execution duty cycle D_s can be kept unchanged (i.e., the left segment of the dotted dashed line 82 corresponds to a fixed value on the Y axis), and the U-phase execution duty cycle D_1 can be changed so that the equivalent duty cycle is equal to the expected duty cycle after the change. Then, the U-phase execution duty cycle D_1 is kept unchanged (i.e., the right segment of the segmented dashed line 81 corresponds to a fixed value on the Y axis), and the W-phase execution duty cycle D_s is changed so that the equivalent duty cycle is equal to the expected duty cycle after the change, so as to facilitate calculation.

[0068] In an embodiment of the present application, when the expected duty cycle changes, the execution duty cycle of one phase can be kept unchanged, while the execution duty cycle of the other phase is changed, so that the equivalent duty cycle is equal to the expected duty cycle after the change, thereby making it more convenient to determine the execution duty cycles of the two phases.

[0069] In some embodiments, Fig.12 As shown, the boost charging process includes a third sub-process, and the third sub-process includes a fifth stage and a sixth stage after the fifth stage;

[0070] Step 1042 “determine the execution duty cycle values ​​of the two phases of the corresponding stage based on the expected duty cycle value of the corresponding stage when the expected duty cycle value of any stage is within the preset range” includes the following steps:

[0071] Step 10425: When the expected duty cycle values ​​of the fifth stage and the sixth stage are both within a preset range, determine a ninth execution duty cycle and a tenth execution duty cycle of the fifth stage based on the fifth expected duty cycle value of the fifth stage;

[0072] Step 10426: Based on the sixth expected duty cycle value of the sixth stage, determine the eleventh execution duty cycle and the twelfth execution duty cycle of the sixth stage; wherein the ninth execution duty cycle is different from the eleventh execution duty cycle, and the tenth execution duty cycle is different from the twelfth execution duty cycle.

[0073] Take D_1 corresponding to a certain period of the U phase to execute the duty cycle, and D_s corresponding to the period of the W phase to execute the duty cycle as an example for explanation. Fig.13 As shown, when the expected duty cycle changes, the W-phase execution duty cycle D_s and the U-phase execution duty cycle D_l both change, that is, the right segment of the segmented dashed line 81 and the left segment of the dotted dashed line 82 corresponding to the Y-axis are not fixed values.

[0074] In the embodiment of the present application, when the expected duty cycle changes, the execution duty cycles of the two phases can be changed so that the equivalent duty cycle is equal to the expected duty cycle after the change, thereby more flexibly determining the execution duty cycles of the two phases.

[0075] In some embodiments, Fig.14 As shown, the electrical signal effective value includes the first voltage effective value of the battery pack and the second voltage effective value of the charging port of the charging pile, or the current effective value; the electrical signal command value includes the first voltage command value of the battery pack and the second voltage command value of the charging port of the charging pile, or the current command value;

[0076] Step 104, “determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase and the effective value of the electrical signal of the corresponding phase in each stage”, includes the following steps:

[0077] Step 1046: Compare the first voltage effective value with the first voltage command value, the second voltage effective value with the second voltage command value, and the current effective value with the current command value of each phase in each stage to obtain a comparison result of a corresponding phase in a corresponding stage;

[0078] Step 1047: Based on the comparison result of each phase in each stage, determine the execution duty cycle value of the corresponding phase in the corresponding stage.

[0079] Among them, the execution duty cycle value of the corresponding phase is determined according to the first voltage command value, the second voltage command value, and / or the current command value. When the comparison result is inconsistent, corresponding voltage adjustment or current adjustment can be performed to adjust the first voltage effective value to the first voltage command value, adjust the second voltage effective value to the second voltage command value, and adjust the current effective value to the current command value.

[0080] In the embodiment of the present application, the voltage effective value and the voltage command value are compared, and the current effective value and the current command value are compared to obtain a comparison result, and the execution duty cycle value is determined based on the comparison result, so that the execution duty cycle value can be determined more accurately.

[0081] Fig.15 FIG. 1 is a schematic diagram of the structure of a boost charging control device 900 according to an embodiment of the present application. Fig.15 As shown, the device includes: a battery pack total voltage acquisition module 901, a charging port voltage acquisition module 902, a boost charging current acquisition module 903, a control and regulation module 904, a duty cycle conversion module 905 and a boost charging chopper control module 906, wherein:

[0082] The boost charging chopper control module 906 corresponds to the three-phase full-bridge control circuit in actual applications. It can control the rotation of the motor and can also perform boost charging. The battery pack total voltage acquisition module 901, the charging port voltage acquisition module 902 and the boost charging current acquisition module 903 are used to acquire the current and voltage monitoring data, and provide them to the control and regulation module 904 for comparison and adjustment with the target voltage / current instructions to achieve stable control and regulation. The desired duty cycle output by the control and regulation module 904 is converted into a duty cycle according to the duty cycle conversion module 905. Fig.11 or Fig.13 The duty cycle corresponding curve of the U-phase and the W-phase can be obtained, and sent to the boost charging chopper control module 906 to implement stable boost charging control.

[0083] It should be noted that in the embodiment of the present application, if the above-mentioned boost charging control method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions to enable an electronic device (which can be a mobile phone, tablet computer, desktop computer, personal digital assistant, navigator, digital phone, video phone, television, sensor device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiment of the present application is not limited to any specific combination of hardware and software.

[0084] Fig.16 FIG. 1 is a schematic diagram of the structure of another boost charging control device according to an embodiment of the present application. Fig.16 As shown, the device 1000 includes: an acquisition module 1001, a determination module 1002, a generation module 1003 and a control module 1004, wherein:

[0085] An acquisition module 1001 is used to acquire the effective value of the electrical signal output by each of the two phases of the motor in each of the multiple stages of the boost charging process;

[0086] A determination module 1002, configured to determine a corresponding phase execution duty cycle value of a corresponding phase in a corresponding stage based on each phase electrical signal command value and a corresponding phase electrical signal effective value in each stage;

[0087] A generating module 1003 is used to generate a PWM wave of each phase of the corresponding stage based on the duty cycle value of each phase of each stage, wherein the waveforms of the PWM waves of the two phases are staggered by 180 degrees;

[0088] The control module 1004 is used to drive the two phases of the motor to perform boost charging control on the vehicle in the corresponding phase based on the PWM wave of each phase in the two phases of each phase by using the motor controller.

[0089] In some embodiments, the two phases include a second phase and a third phase, and the determination module 1002 includes: a first determination submodule, which is used to determine the expected duty cycle value of the corresponding stage based on the electrical signal command value of each phase in each stage and the effective value of the electrical signal of the corresponding phase; a second determination submodule, which is used to determine the execution duty cycle values ​​of the two phases of the corresponding stage based on the expected duty cycle value of the corresponding stage when the expected duty cycle value of any stage is within a preset range, and the execution duty cycle values ​​of the two phases are different; a third determination submodule, which is used to loop the following steps in multiple switching cycles of each stage until the corresponding stage ends: in the current switching cycle of each stage, determine the execution duty cycle value of the second phase to be the first execution duty cycle, and determine the execution duty cycle value of the third phase to be the second execution duty cycle; a fourth determination submodule, which is used to determine the execution duty cycle value of the second phase to be the second execution duty cycle, and determine the execution duty cycle value of the third phase to be the first execution duty cycle in the next switching cycle of each stage.

[0090] In some embodiments, the device further includes: a fifth determination submodule, configured to determine the expected duty cycle value of the corresponding stage as the execution duty cycle value of each phase of the corresponding stage when the expected duty cycle value of each stage is not within the preset range.

[0091] In some embodiments, the boost charging process includes a first sub-process and a second sub-process after the first sub-process, the first sub-process includes a first stage and a second stage after the first stage, and the second sub-process includes a third stage and a fourth stage after the third stage; the second determination submodule includes: a first determination unit, which is used to determine the first execution duty cycle and the second execution duty cycle of the first stage based on the first expected duty cycle value of the first stage when the expected duty cycle values ​​of the first stage and the second stage are both within a preset range; a second determination unit, which is used to determine the third execution duty cycle and the fourth execution duty cycle of the second stage based on the second expected duty cycle value of the second stage a fourth execution duty cycle; wherein the first execution duty cycle is the same as the third execution duty cycle, and the second execution duty cycle is different from the fourth execution duty cycle; a third determining unit, used to determine the fifth execution duty cycle and the sixth execution duty cycle of the third stage based on the third expected duty cycle value of the third stage, when the expected duty cycle values ​​of the third stage and the fourth stage are both within a preset range; a fourth determining unit, used to determine the seventh execution duty cycle and the eighth execution duty cycle of the fourth stage based on the fourth expected duty cycle value of the fourth stage; wherein the fifth execution duty cycle is different from the seventh execution duty cycle, and the sixth execution duty cycle is the same as the eighth execution duty cycle.

[0092] In some embodiments, the boost charging process includes a third sub-process, and the third sub-process includes a fifth stage and a sixth stage after the fifth stage; the second determination submodule includes: a fifth determination unit, used to determine the ninth execution duty cycle and the tenth execution duty cycle of the fifth stage based on the fifth expected duty cycle value of the fifth stage when the expected duty cycle values ​​of the fifth stage and the sixth stage are both within a preset range; a sixth determination unit, used to determine the eleventh execution duty cycle and the twelfth execution duty cycle of the sixth stage based on the sixth expected duty cycle value of the sixth stage; wherein the ninth execution duty cycle is different from the eleventh execution duty cycle, and the tenth execution duty cycle is different from the twelfth execution duty cycle.

[0093] In some embodiments, the effective value of the electrical signal includes the first effective value of the voltage of the battery pack and the second effective value of the voltage of the charging port of the charging pile, or the effective value of the current; the electrical signal command value includes the first voltage command value of the battery pack and the second voltage command value of the charging port of the charging pile, or the current command value; the determination module 1002 includes: a comparison submodule, which is used to compare the first voltage effective value of each phase of each stage with the first voltage command value, the second voltage effective value with the second voltage command value, and the current effective value with the current command value to obtain the comparison result of the corresponding phase of the corresponding stage; a sixth determination submodule, which is used to determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the comparison result of each phase of each stage.

[0094] Based on the above embodiments, the present application also provides an electronic device, Fig.17 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. Fig.17 As shown, the hardware entity of the device 1100 includes: a memory 1101 and a processor 1102, wherein the memory 1101 stores a computer program that can be run on the processor 1102, and the processor 1102 implements the steps of the boost charging control method in the above embodiment when executing the program.

[0095] The memory 1101 is configured to store instructions and applications executable by the processor 1102, and can also cache data to be processed or processed by the processor 1102 and various modules in the device 1100 (for example, image data, audio data, voice communication data, and video communication data), which can be implemented through flash memory (FLASH) or random access memory (Random Access Memory, RAM).

[0096] Based on the foregoing embodiments, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor of an electronic device, the boost charging control method provided in any of the previous embodiments can be implemented.

[0097] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0098] The methods disclosed in the various method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0099] The features disclosed in the various product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0100] The features disclosed in the various method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0101] It should be noted that the above-mentioned computer-readable storage medium can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM) and other memories; it can also be various electronic devices including one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0102] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0103] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0104] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus necessary general hardware nodes, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0105] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0108] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A boost charging control method, characterized in that: Applied to a boost charging circuit, the circuit includes a motor, a motor controller, a battery pack and a boost charging switch, the positive and negative electrodes of the battery pack are respectively connected to the positive and negative electrodes of the motor controller, one end of the boost charging switch is connected to a charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller, the method includes: Obtaining the effective value of the electrical signal output by each of the other two phases of the motor in each of the multiple stages of the boost charging process; Determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the command value of each phase electrical signal and the effective value of the corresponding phase electrical signal in each stage; Based on the duty cycle value of each phase in each stage, a corresponding phase PWM wave of the corresponding stage is generated, and the waveforms of the PWM waves of the other two phases are staggered by 180 degrees; Based on the PWM wave of each phase in the other two phases of each stage, the motor controller is used to drive the other two phases of the motor to perform boost charging control on the vehicle in the corresponding stage; The other two phases include a second phase and a third phase, and the step of determining the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase includes: Determine the expected duty cycle value of the corresponding stage based on the command value of each phase electrical signal and the effective value of the corresponding phase electrical signal in each stage; When the expected duty cycle value of any stage is within a preset range, based on the expected duty cycle value of the corresponding stage, the execution duty cycle values ​​of the two phases of the corresponding stage are determined, and the execution duty cycle values ​​of the two phases are different; The following steps are repeated in multiple switching cycles of each stage until the corresponding stage ends: In a current switching cycle of each stage, determining the execution duty cycle value of the second phase to be a first execution duty cycle, and determining the execution duty cycle value of the third phase to be a second execution duty cycle; In the next switching cycle of each stage, the execution duty cycle value of the second phase is determined to be the second execution duty cycle, and the execution duty cycle value of the third phase is determined to be the first execution duty cycle.

2. The method according to claim 1, characterized in that The method further comprises: When the expected duty cycle value of each stage is not within the preset range, the expected duty cycle value of the corresponding stage is determined as the execution duty cycle value of each phase of the corresponding stage.

3. The method according to claim 1, characterized in that The boost charging process includes a first sub-process and a second sub-process after the first sub-process, the first sub-process includes a first stage and a second stage after the first stage, and the second sub-process includes a third stage and a fourth stage after the third stage; When the expected duty cycle value of any stage is within a preset range, determining the execution duty cycle values ​​of the two phases of the corresponding stage based on the expected duty cycle value of the corresponding stage includes: In a case where the expected duty cycle values ​​of the first stage and the second stage are both within a preset range, determining a first execution duty cycle and a second execution duty cycle of the first stage based on the first expected duty cycle value of the first stage; determining a third execution duty cycle and a fourth execution duty cycle of the second stage based on the second expected duty cycle value of the second stage; wherein the first execution duty cycle and the third execution duty cycle are the same, and the second execution duty cycle and the fourth execution duty cycle are different; When the expected duty cycle values ​​of the third stage and the fourth stage are both within a preset range, the fifth execution duty cycle and the sixth execution duty cycle of the third stage are determined based on the third expected duty cycle value of the third stage; the seventh execution duty cycle and the eighth execution duty cycle of the fourth stage are determined based on the fourth expected duty cycle value of the fourth stage; wherein the fifth execution duty cycle and the seventh execution duty cycle are different, and the sixth execution duty cycle and the eighth execution duty cycle are the same.

4. The method according to claim 1, characterized in that: The boost charging process includes a third sub-process, and the third sub-process includes a fifth stage and a sixth stage after the fifth stage; When the expected duty cycle value of any stage is within a preset range, determining the execution duty cycle values ​​of the two phases of the corresponding stage based on the expected duty cycle value of the corresponding stage includes: When the expected duty cycle values ​​of the fifth stage and the sixth stage are both within a preset range, the ninth execution duty cycle and the tenth execution duty cycle of the fifth stage are determined based on the fifth expected duty cycle value of the fifth stage; and the eleventh execution duty cycle and the twelfth execution duty cycle of the sixth stage are determined based on the sixth expected duty cycle value of the sixth stage; wherein the ninth execution duty cycle is different from the eleventh execution duty cycle, and the tenth execution duty cycle is different from the twelfth execution duty cycle.

5. The method according to claim 1, characterized in that The electrical signal effective value includes a first voltage effective value of the battery pack and a second voltage effective value of the charging port of the charging pile, or a current effective value; the electrical signal command value includes a first voltage command value of the battery pack and a second voltage command value of the charging port of the charging pile, or a current command value; The step of determining the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase comprises: Compare the first voltage effective value with the first voltage command value, the second voltage effective value with the second voltage command value, and the current effective value with the current command value of each phase in each stage to obtain a comparison result of a corresponding phase in a corresponding stage; Based on the comparison result of each phase in each stage, the execution duty cycle value of the corresponding phase in the corresponding stage is determined.

6. A boost charging control device, characterized in that: Applied to a boost charging circuit, the circuit includes a motor, a motor controller, a battery pack and a boost charging switch, the positive and negative electrodes of the battery pack are respectively connected to the positive and negative electrodes of the motor controller, one end of the boost charging switch is connected to a charging pile, and the other end is respectively connected to the motor and the first phase of the motor controller, the device includes: An acquisition module, used to acquire the effective value of the electrical signal output by each of the other two phases of the motor in each of the multiple stages of the boost charging process; A determination module, used to determine the execution duty cycle value of the corresponding phase of the corresponding stage based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase; the other two phases include the second phase and the third phase, and the expected duty cycle value of the corresponding stage is determined based on the electrical signal command value of each phase of each stage and the effective value of the electrical signal of the corresponding phase. When the expected duty cycle value of any stage is within a preset range, the execution duty cycle values ​​of the two phases of the corresponding stage are determined based on the expected duty cycle value of the corresponding stage, and the execution duty cycle values ​​of the two phases are different; the following steps are cyclically performed in multiple switching cycles of each stage until the corresponding stage ends: in the current switching cycle of each stage, the execution duty cycle value of the second phase is determined to be the first execution duty cycle, and the execution duty cycle value of the third phase is determined to be the second execution duty cycle; in the next switching cycle of each stage, the execution duty cycle value of the second phase is determined to be the second execution duty cycle, and the execution duty cycle value of the third phase is determined to be the first execution duty cycle; A generating module, configured to generate a PWM wave of each phase of each phase based on the duty cycle value of each phase of each phase, wherein the waveforms of the PWM waves of the other two phases are staggered by 180 degrees; The control module is used to drive the other two phases of the motor by the motor controller to perform boost charging control on the vehicle in the corresponding phase based on the PWM wave of each phase of the two phases in each phase.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the program, the steps of the boost charging control method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium, characterized in that: Executable instructions are stored, which are used to cause the processor to execute the executable instructions to implement the boost charging control method described in any one of claims 1 to 5.

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