A power supply device and a new energy vehicle

Abstract

The present application provides a power supply device, which includes a main power module, a first voltage control loop, a second voltage control loop, a current control loop, a loop selection module, a data update unit, a data holding module and a driving module. The first voltage control loop is configured to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop is configured to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop is configured to receive a quantity reflecting the output current and an output current reference value, and output a third value; the loop selection module is configured to select one of the loops, and the output end of the loop selection module is connected to the data update unit and the data holding module; the data update unit is connected to the data holding module, and is configured to determine the selected loop and output a corresponding update frequency to the data holding module; the data holding module is connected to the driving module; and the driving module is configured to provide a driving signal to the main power module.

Description

Technical Field

[0001] This application relates to the field of power electronic power converters, and particularly to a power supply device and a new energy vehicle. Background Art

[0002] New energy electric vehicles are becoming more and more popular, and their market share is getting higher and higher. Charging anxiety is an accompanying industry problem. For charging anxiety, one solution is to continuously increase the charging power to shorten the charging time and reduce the anxiety of vehicle owners. Two directions for increasing the charging power are to increase the charging current and increase the charging voltage.

[0003] Due to the standardization of the charging port, the charging current cannot be increased infinitely. Therefore, the development trend of high-voltage platforms such as 800 volts (V) is prominent to increase the charging voltage to increase the charging power and shorten the charging time. However, since most passenger vehicles were below 450V during the early stage of market development, and the corresponding DC power supply equipment was mainly below 500V, there is also a non-negligible actual distribution ratio up to now, which brings the problem of voltage mismatch when charging vehicles with 800V high-voltage platforms. For this voltage mismatch problem, related technologies use the motor as an inductor and the controller (Motor Control Unit, MCU) as a controller to perform boost charging.

[0004] However, during the boost charging process, it is necessary to control the boost for two target voltages, resulting in too high software control coupling degree of the controller and poor compatibility. Summary of the Invention

[0005] This application provides a power supply device and a new energy vehicle to solve the problems of too high coupling degree and poor compatibility during the boost charging process.

[0006] In a first aspect, this application provides a power supply device, including a main power module, a first voltage control loop, a second voltage control loop, a current control loop, a loop selection module, a data update unit, a data holding module, and a driving module, where,

[0007] The first voltage control loop is configured to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop is configured to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop is configured to receive a quantity reflecting the output current and an output current reference value, and output a third value;

[0008] The input terminals of the loop selection module respectively receive the first value, the second value, and the third value and select one of the loops according to the first value, the second value, and the third value. The output terminal of the loop selection module is connected to the data update unit and the data holding module;

[0009] The data update unit is connected to the data holding module, and is used to determine the loop selected by the loop selection module and output the update frequency corresponding to the loop to the data holding module; the data holding module is connected to the driving module; the driving module is used to provide a driving signal to the main power module and control the output voltage of the main power module.

[0010] In one embodiment, the loop selection module is further configured to obtain a fourth value of the driving module in the previous cycle, and the loop selection module is further configured to

[0011] obtain the maximum or minimum value of the first value, the second value and the third value, and add the maximum or minimum value of the first value, the second value and the third value to the fourth value and then transmit it to the data holding module.

[0012] In one embodiment, the loop selection module is further configured to obtain a fourth value of the driving module in the previous cycle, and the loop selection module is further configured to

[0013] add the first value, the second value and the third value to the fourth value respectively, obtain the maximum or minimum value of the first value, the second value and the third value after adding the fourth value, and transmit the maximum or minimum value to the data holding module.

[0014] In one embodiment, the data update unit is used to

[0015] determine the loop selected by the loop selection module and determine the corresponding update frequency according to the selected loop, and output the update frequency to the data holding module;

[0016] wherein, the first voltage control loop, the second voltage control loop and the current control loop respectively correspond to different update frequencies.

[0017] In one embodiment, the data update unit determines the loop selected by the loop selection module according to the maximum or minimum value of the first value, the second value and the third value.

[0018] In one embodiment, the loop selection module further includes a limiting unit, and the limiting unit is used to limit the first value, the second value and the third value within a preset range; or

[0019] limit the first value, the second value and the third value after signal processing within a preset range.

[0020] In one embodiment, the main power module includes an inverter unit and a motor unit, and the inverter unit and the motor unit are cascaded.

[0021] In one embodiment, the power supply device further includes a reference value setting module, and the reference value setting module is used to output a first voltage reference value, a second voltage reference value and an output current reference value.

[0022] In one embodiment, the first value, the second value, and the third value are duty cycle adjustment amounts;

[0023] The fourth value is the duty cycle of the previous cycle of the drive module.

[0024] In a second aspect, the present application also provides a new energy vehicle, including the above-mentioned power supply device.

[0025] In a third aspect, the present application also provides a control method for a power supply device. The power supply device includes a main power module for boosting. The control method includes:

[0026] The first voltage control loop obtains a first value according to a first voltage reference value and a quantity reflecting the bus voltage;

[0027] Connect the first value to the first input terminal of a loop selection module;

[0028] The second voltage control loop obtains a second value according to a second voltage reference value and a quantity reflecting the charging port voltage;

[0029] Connect the second value to the second input terminal of the loop selection module;

[0030] The current control loop obtains a third value according to an output current reference value and a quantity reflecting the output current;

[0031] Connect the third value to the third input terminal of the loop selection module;

[0032] Connect the output terminal of the loop selection module to a data update unit and a data holding module. The loop selection module is used to select one of the loops;

[0033] The data update unit determines the loop selected by the loop selection module and determines the update frequency corresponding to the loop, and transmits the update frequency to the data holding module;

[0034] The data holding module transmits the current loop and the update frequency of the current loop to the drive module;

[0035] The drive module generates a drive signal to control the main power module.

[0036] The present application provides a power supply device, including a main power module, a first voltage control loop, a second voltage control loop, a current control loop, a loop selection module, a data update unit, a data holding module, and a driving module. Among them, the first voltage control loop is used to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop is used to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop is used to receive a quantity reflecting the output current and an output current reference value, and output a third value; the input ends of the loop selection module respectively receive the first value, the second value, and the third value, and determine one of the loops according to the first value, the second value, and the third value. The output end of the loop selection module is connected to the data update unit and the data holding module; the data update unit is connected to the data holding module, and is used to determine the loop selected by the loop selection module and output the update frequency corresponding to the loop to the data holding module; the data holding module is connected to the driving module; the driving module is used to provide a driving signal to the main power module and control the output voltage of the main power module. By adopting three control loops, two voltage control loops and one current control loop, electrical signals are output by comparing the actual value with the reference value, and one of the loops is selected by the loop selection module to control the main power module to boost the voltage, thereby reducing the coupling degree. Moreover, the two voltage control loops can also improve the compatibility, and thus can realize the fast boost charging of the powered device; secondly, the data holding module is used to make the change of the control quantities of the three loops based on the same basis (the output value of the previous cycle of the data holding module), thereby avoiding the problem of loop oscillation caused by excessive change when the three loops switch to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0038] Figure 1 It is a schematic structural diagram of the power supply device provided by an embodiment of the present application;

[0039] Figure 2 It is a schematic structural diagram of the power supply device provided by an embodiment of the present application;

[0040] Figure 3 It is a schematic structural diagram of the power supply device provided by another embodiment of the present application;

[0041] Figure 4 It is a flowchart of the data update unit determining the loop and the corresponding update frequency in an embodiment of the present application;

[0042] Figure 5 It is a topological circuit diagram of a new energy vehicle and a charging pile in an embodiment of the present application;

[0043] Figure 6A It is the circuit structure diagram of the main power module in an embodiment of the present application;

[0044] Figure 6B It is the circuit structure diagram of the main power module in an embodiment of the present application;

[0045] Figure 6C It is the circuit structure diagram of the main power module in an embodiment of the present application;

[0046] Figure 7 It is the flowchart of the control method of the power supply device in an embodiment of the present application;

[0047] Figure 8 It is the flowchart of the control method of the power supply device in an embodiment of the present application;

[0048] Figure 9 It is the flowchart of the control method of the power supply device in an embodiment of the present application.

[0049] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be given later. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0050] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0051] In order to address the charging anxiety of new energy electric vehicles, the charging power can be increased. There are two directions to increase the charging power, which are to increase the charging current and increase the charging voltage. Due to the standardization of the charging port, the charging current cannot be increased infinitely. Therefore, the development trend of high-voltage platforms such as 800 volts (V) is prominent to increase the charging voltage to increase the charging power and shorten the charging time. However, since the passenger cars were mainly below 450V during the early stage of market development, and the corresponding DC power supply equipment was mainly below 500V, the actual distribution ratio that cannot be ignored has developed until now, bringing the problem of voltage mismatch when charging vehicles with an 800V high-voltage platform. For this voltage mismatch problem, the related technology uses the motor as an inductor and the controller (Motor Control Unit, MCU) as a controller for boost charging.

[0052] Regarding using the motor controller as an inductor for boost charging, there are the following several control ideas:

[0053] (1) Using the voltage PID regulation loop as the core, the actual voltage is collected every cycle and the voltage regulation is completed through the voltage regulation loop for boost charging. However, there are the following disadvantages: Collecting the actual voltage every cycle requires a high voltage sampling rate, which is not suitable for scenarios with low sampling rates, and using a high-rate sampling device will increase costs. (2) Using the current PID regulation loop as the core, the actual current is collected every cycle and the current regulation is completed through the current regulation loop, thereby achieving boost charging. However, the current control of the charging pile and the motor controller is prone to out-of-sync problems, which may lead to the charging pile triggering protection, stopping charging, and causing a decrease in the charging rate. (3) Establishing a voltage-current double loop, with the current inner loop and the voltage outer loop. The current regulation inner loop is completed, and the voltage regulation is indirectly completed through the current loop. However, there is only one voltage loop and it cannot be applied to the case of two target voltages simultaneously. Two control modes need to be developed for the two target voltages, which will lead to a too high coupling degree with the control software processes of controllers such as the battery management system and poor compatibility. When the voltage loop is working, if the working current changes greatly, it will cause the current loop to work, which will lead to unnecessary adjustments of the control loop and unnecessary fluctuations. (4) Establishing a voltage-current double loop, with the current loop and the voltage loop in parallel. However, in the parallel loop, it is easy to have oscillations and repeated switching when switching between the voltage loop and the current loop, inducing out-of-control of the control loop and poor stability. And there is only one voltage loop and it cannot be applied to the case of two target voltages simultaneously. Two control modes need to be developed for the two target voltages, which will lead to a too high coupling degree with the control software processes of controllers such as the battery management system and poor compatibility.

[0054] In view of this, the present application provides a power supply device, including a main power module, a first voltage control loop, a second voltage control loop, a current control loop, a loop selection module, a data update unit, a data holding module, and a driving module. Among them, the first voltage control loop is configured to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop is configured to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop is configured to receive a quantity reflecting the output current and an output current reference value, and output a third value; the input terminals of the loop selection module respectively receive the first value, the second value, and the third value and determine one of the loops according to the first value, the second value, and the third value. The output terminal of the loop selection module is connected to the data update unit and the data holding module; the data update unit is connected to the data holding module, and is configured to determine the loop selected by the loop selection module and output the update frequency corresponding to the loop to the data holding module; the data holding module is connected to the driving module; the driving module is configured to provide a driving signal to the main power module and control the output voltage of the main power module. By adopting three control loops, two voltage control loops and one current control loop, electrical signals are output by comparing the actual value with the reference value, and one of the loops is selected by the loop selection module to control the main power module to boost the voltage, thereby reducing the coupling degree. Moreover, the two voltage control loops can also improve the compatibility, and thus can realize the fast boost charging of the powered device; secondly, the data holding module is used to make the change of the control amounts of the three loops based on the same basis (the output value of the previous cycle of the data holding module), thereby avoiding the problem of loop oscillation caused by excessive change amounts when the three loops switch with each other.

[0055] Embodiment 1

[0056] Based on the above several control ideas for using a motor controller as an inductor to boost the voltage for charging, such as Figure 1As shown in the figure, the present application provides a power supply device, including a main power module 110, a first voltage control loop 121, a second voltage control loop 122, a current control loop 123, a loop selection module 130, a data update unit 150, a data holding module 160, and a driving module 140. Among them, the first voltage control loop 121 is used to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop 122 is used to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop 123 is used to receive a quantity reflecting the output current and an output current reference value, and output a third value; the input terminals of the loop selection module 130 respectively receive the first value, the second value, and the third value and perform processing. The output terminal of the loop selection module 130 is connected to the input terminals of the data holding module 160 and the data update unit 150. The output terminal of the data update unit 150 is connected to the input terminal of the data holding module 160; the data holding module 160 is connected to the input terminal of the driving module 140. The loop selection module 130 is used to transmit one of the processed first value, second value, and third value to the input terminal of the data holding module 160; the output terminal of the driving module 140 provides a driving signal to the main power module 110 for controlling the output voltage of the main power module 110.

[0057] In the present application, by adopting three control loops, two voltage control loops and one current control loop, electrical signals are output by comparing the actual value with the reference value. The loop selection module selects one of the loops to control the main power module to boost the voltage, thereby reducing the coupling degree. Secondly, the two voltage control loops can control two target voltages, improving the compatibility, and further enabling rapid boost charging of the power receiving device.

[0058] The first voltage control loop, the second voltage control loop, and the current control loop are connected in parallel.

[0059] In one embodiment, the power supply device further includes a reference value setting module, which is used to output a first voltage reference value, a second voltage reference value, and an output current reference value. Specifically, the first voltage reference value, the second voltage reference value, and the output current reference value are set based on the requirements of the power receiving device and the port voltage of the charging pile. The present application does not limit the specific reference values, which can be set according to the actual situation.

[0060] In one embodiment, as Figure 2 shown Figure 2Schematic diagram of the power supply device structure provided by an embodiment of the present application. The power supply device further includes a bus voltage acquisition module, a charging port voltage acquisition module, and an output current acquisition module. The bus voltage acquisition module is used to acquire the bus voltage value of the main power module, which can be understood as the actual bus voltage value; the charging port voltage acquisition module is used to acquire the charging port voltage value of the main power module; the output current acquisition module is used to acquire the charging current value during actual charging of the main power module. The first voltage control loop outputs a first value according to the first voltage reference value and the actual bus voltage value; the second voltage control loop outputs a second value according to the second voltage reference value and the charging port voltage value; the current control loop outputs a third value according to the output current reference value and the actual output current value. Optionally, the first value, the second value, and the third value are an increment or adjustment amount, and signal processing is required before they can be used to control the main power module, and then control the main power module to boost the voltage.

[0061] The loop selection module can select one of the first voltage control loop, the second voltage control loop, or the current control loop, and control the main power module according to this loop, thereby completing voltage regulation.

[0062] Embodiment 2

[0063] In one of the embodiments, as Figure 2 shown, the loop selection module is further used to obtain a fourth value of the driving module in the previous cycle, and the loop selection module is further used to

[0064] obtain the maximum or minimum value of the first value, the second value, and the third value, and add the maximum or minimum value of the first value, the second value, and the third value to the fourth value and transmit it to the driving module.

[0065] Specifically, as can be seen from the foregoing, the first value, the second value, and the third value are only an increment or adjustment amount and cannot be directly used to control the main power module, while the fourth value is equivalent to a base amount. After obtaining the maximum or minimum value of the first value, the second value, and the third value, it is added to the base amount of the fourth value and transmitted to the driving module. The driving module outputs a driving signal, thereby controlling the main power module.

[0066] In one of the embodiments, the first value, the second value, and the third value are duty cycle adjustment amounts; the fourth value is the duty cycle of the driving module in the previous cycle.

[0067] For the boost charging connection method with a common positive electrode, the minimum value of the first value, the second value, and the third value is obtained; for the boost charging connection method with a common negative electrode, the maximum value of the first value, the second value, and the third value is obtained; in actual operation, the maximum or minimum value can be determined according to the connection method of the boost charging, and the present application does not limit this here.

[0068] Therefore, the loop selection module of the present application selects one of the loops according to the maximum value or the minimum value, and uses the driving module to make the control quantity changes of the three loops based on the same basis (the duty cycle of the previous cycle of the driving module), thereby avoiding the loop oscillation problem caused by excessive change when the three loops switch with each other.

[0069] Embodiment III

[0070] In one of the embodiments, as Figure 3 shown, Figure 3 is a schematic structural diagram of a power supply device in an embodiment of the present application. The loop selection module is further configured to obtain a fourth value of the previous cycle of the driving module, and the loop selection module is further configured to

[0071] add the first value, the second value, and the third value to the fourth value respectively to obtain the maximum value or the minimum value of the first value, the second value, and the third value after being added to the fourth value, and transmit the maximum value or the minimum value to the driving module.

[0072] Specifically, as can be seen from the foregoing, the first value, the second value, and the third value are only an increment or an adjustment amount and cannot be directly used to control the main power module, while the fourth value is equivalent to a base amount. After adding the first value, the second value, and the third value to the fourth value respectively, then obtaining the maximum value or the minimum value, and transmitting the maximum value or the minimum value to the driving module, the driving module outputs a driving signal, and then controls the main power module.

[0073] In one of the embodiments, the first value, the second value, and the third value are duty cycle adjustment amounts; the fourth value is the duty cycle of the previous cycle of the driving module.

[0074] For the boost charging connection method with a common positive electrode, the minimum value of the first value, the second value, and the third value is obtained; for the boost charging connection method with a common negative electrode, the maximum value of the first value, the second value, and the third value is obtained; in actual operation, the maximum value or the minimum value can be determined according to the connection method of the boost charging, and the present application does not limit this here.

[0075] The duty ratio value obtained by adding the minimum / maximum duty ratio adjustment amount output by the Min / Max module in the loop selection module to the saved value of the data holding module in the previous cycle is limited to a reasonable range (such as 0.5% - 99.5%) by the duty ratio limiting module and then given to the data holding module. The function of the data holding module is data holding and transmission. When the update pulse is at the rising edge, the output value of the module is updated to the input value; when the update pulse is not at the start of a cycle of the loop, the output value of the module remains unchanged from the previous cycle value. The update pulse comes from the data update pulse generation module, which adjusts the loop by comprehensively acting on the three duty ratio adjustment amounts and the duty ratio adjustment amount output by the Min / Max module and outputs an update pulse with a corresponding rising edge frequency to achieve different control periods for different function loops, thereby avoiding the problem of mutual influence caused by the asynchronization of the periods of each parallel loop. The preliminary control duty ratio output by the data holding module is added to the change amount of the control duty ratio obtained by differentiating the boost charging current, that is, the duty ratio control value of this cycle is obtained, and this control value is given to the boost charging chopper execution module for execution to achieve the closed-loop control of the loop. Thus, the loop selection module of this application selects one of the loops according to the maximum or minimum value, and uses the data update unit and the data holding module to make the control quantity changes of the three loops based on the same basis (the duty ratio of the previous cycle of the drive module), thereby avoiding the problem of loop oscillation caused by excessive changes when the three loops switch to each other.

[0076] In one embodiment, as Figure 2 、 Figure 3 shown, the loop selection module further includes a limiting unit, and the limiting unit is used to limit the first value, the second value, and the third value within a preset range; or limit the first value, the second value, and the third value after signal processing within a preset range.

[0077] Specifically, the first value, the second value, and the third value are duty ratio adjustment amounts, and the fourth value is the duty ratio of the previous cycle of the drive module. Since there is a reasonable range for the duty ratio, considering the dead time, the preset range is generally 0.5% - 99.5%. This application does not limit the preset range of the duty ratio and can be determined according to the actual situation.

[0078] In one embodiment, as Figure 2 、 Figure 3 shown, the loop selection module includes a data update unit, and the data update unit is used to determine the loop selected by the loop selection module and determine the corresponding update frequency according to the loop, and output the update frequency to the data holding module;

[0079] The data holding module outputs a control value to the drive module according to the update frequency and the pulse in the loop selected by the loop selection module, and the drive module controls the output voltage of the main power module;

[0080] Among them, the first voltage control loop, the second voltage control loop, and the current control loop respectively correspond to different update frequencies.

[0081] Specifically, when the data holding module needs to switch data (i.e., when the loop switches), it needs to start updating the new drive signal and the update frequency at the rising edge of the drive signal, so as to achieve different update frequencies for different loop controls and avoid oscillations during loop switching. Secondly, the update changes of the control parameters of the three parallel loops are all based on the control parameter values of the previous cycle held by the same drive module, which can well avoid the problem that the control parameter changes are too drastic during loop switching, resulting in loop oscillations. The update of the drive signal of the drive module is adjusted by the data update unit in the loop selection module according to the currently regulating loop, so that the data update frequency of the drive module is consistent with the period of the current loop, thus avoiding the problem of mutual influence caused by the asynchronous periods of the parallel loops. Therefore, the data update unit is used to determine the loop and the corresponding update frequency.

[0082] In one embodiment, the data update unit determines the loop selected by the loop selection module according to the maximum or minimum value among the first value, the second value, and the third value.

[0083] Specifically, as Figure 4 shown, Figure 4 is a flowchart for the data update unit of an embodiment of the present application to determine the loop and the corresponding update frequency. In the figure, it is judged which loop among the three loops is the currently regulating loop according to the input quantities A, B, C, and D. A is the value output by the first voltage control loop; B is the value output by the second voltage control loop; C is the value output by the current control loop; D is the value output after the mix / max module. There are two ways to judge the currently regulating loop:

[0084] One is to compare the magnitudes of the three values of A, B, and C. In the case of common positive connection, the loop corresponding to the minimum value is the currently regulating loop; in the case of common negative connection, the loop corresponding to the maximum value is the currently regulating loop.

[0085] The other is to compare which of the three values of A, B, and C is equal to D, and the loop corresponding to the value equal to D is the currently regulating loop.

[0086] After the currently active loop is determined, the corresponding mapped value is output to the gating switch. For example, the charging port voltage loop corresponds to value 1, the bus voltage loop corresponds to value 2, and the boost charging current loop corresponds to value 3. It can also be other values. The gating switch connects the corresponding input to the output according to the value of Ctrl. Continuing with the example of values 1, 2, and 3, when Ctrl is 1 / 2 / 3, the input and output count values of In1 / In2 / In3 are connected. The count value output by the gating switch is then compared with the starting value, thresholds X, Y, and Z for judgment. Counting, cumulative counting. When the output count value is equal to the starting value, 1 is output; otherwise, 0 is output. This output is the update frequency of the corresponding loop.

[0087] When Ctrl is 1 / 2 / 3, if the output count value is greater than or equal to the thresholds X / Y / Z, the count value is set to the starting value; otherwise, the count value is incremented by 1, and the new count value is output to the gating switch In1 / In2 / In3.

[0088] Optionally, the thresholds X / Y / Z are selected according to the acquisition update frequencies of the three loops. For example, when the acquisition update frequencies of the charging port voltage / bus voltage / boost charging current are 10 ms / 1 ms / 100 μs respectively, X = 100, Y = 10, Z = 1 or their multiples can be selected.

[0089] In one embodiment, as Figure 6A 、 Figure 6B 、 Figure 6C shown, Figure 6A is the circuit structure diagram of the main power module in an embodiment of the present application; Figure 6B is the circuit structure diagram of the main power module in an embodiment of the present application; Figure 6C is the circuit structure diagram of the main power module in an embodiment of the present application. The main power module includes an inverter unit and a motor unit, and the inverter unit and the motor unit are cascaded.

[0090] Specifically, the inverter unit is composed of power switching devices. The bus voltage is the voltage across the bus capacitor, and the output current is the current between HV+ and HV-. The charging port voltage is the voltage between HV+ and HV-.

[0091] Second, the present application also provides a new energy vehicle, as Figure 5 shown, Figure 5 is the topological circuit diagram of the new energy vehicle and the charging pile in an embodiment of the present application. The new energy vehicle includes the power supply device as described above.

[0092] Third, the present application also provides a control method for a power supply device, as Figure 7 shown. The power supply device includes a main power module for boosting. The control method includes the following steps:

[0093] The first voltage control loop obtains a first value based on a first voltage reference value and a quantity reflecting the bus voltage;

[0094] Connect the first value to the first input terminal of a loop selection module;

[0095] The second voltage control loop obtains a second value based on a second voltage reference value and a quantity reflecting the charging port voltage;

[0096] Connect the second value to the second input terminal of the loop selection module;

[0097] The current control loop obtains a third value based on an output current reference value and a quantity reflecting the output current;

[0098] Connect the third value to the third input terminal of the loop selection module;

[0099] Connect the output terminal of the loop selection module to a data update unit and a data holding module, and the loop selection module is used to select one of the loops;

[0100] The data update unit determines the loop selected by the loop selection module and determines the update frequency corresponding to the loop, and transmits the update frequency to the data holding module;

[0101] The data holding module transmits the current loop and the update frequency of the current loop to the drive module;

[0102] The drive module generates a drive signal to control the main power module.

[0103] In one embodiment, the loop selection module is used to process signals of the first value, the second value and the third value, and further includes the following steps, such as Figure 8 shown Figure 8 is a flowchart of a control method of a power supply device according to an embodiment of the present application:

[0104] Obtain a fourth value of the previous cycle on the data holding module;

[0105] Add the first value, the second value and the third value to the fourth value respectively, and obtain the maximum or minimum value of the first value, the second value and the third value after adding to the fourth value, or

[0106] Obtain the maximum or minimum value of the first value, the second value and the third value, and add the maximum or minimum value of the first value, the second value and the third value to the fourth value.

[0107] In one embodiment, as Figure 9 shown Figure 9 is a flowchart of a control method of a power supply device according to an embodiment of the present application, and the control method further includes:

[0108] Determine the loop selected by the loop selection module, determine the corresponding update frequency according to the loop, and transmit the update frequency to the data retention module;

[0109] The data retention module determines the output control value according to the update frequency and the pulses of the current loop.

[0110] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only illustrative, and the true scope and spirit of the present application are pointed out by the following claims.

[0111] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A power supply device, characterized in that, It includes a main power module, a first voltage control loop, a second voltage control loop, a current control loop, a loop selection module, a data update unit, a data holding module, and a driving module. Among them, the first voltage control loop is used to receive a quantity reflecting the bus voltage and a first voltage reference value, and output a first value; the second voltage control loop is used to receive a quantity reflecting the charging port voltage and a second voltage reference value, and output a second value; the current control loop is used to receive a quantity reflecting the output current and an output current reference value, and output a third value; the input ends of the loop selection module respectively receive the first value, the second value, and the third value, and select one of the loops according to the first value, the second value, and the third value. The output end of the loop selection module is connected to the data update unit and the data holding module; the data update unit is connected to the data holding module, and is used to determine the loop selected by the loop selection module and output the update frequency corresponding to the loop to the data holding module; the data holding module is connected to the driving module. The data holding module is used to update a new driving signal and update frequency at the rising edge of the driving signal when the loop is switched, so that different loop controls have different update frequencies; the driving module is used to provide a driving signal to the main power module and control the output voltage of the main power module; the loop selection module is further used to obtain a fourth value of the driving module in the previous cycle. The loop selection module is further used to for the boost charging connection mode with a common positive electrode, obtain the minimum value of the first value, the second value, and the third value. For the boost charging connection mode with a common negative electrode, obtain the maximum value of the first value, the second value, and the third value; and add the maximum value or minimum value of the first value, the second value, and the third value to the fourth value and then transmit it to the data holding module; where the first value, the second value, and the third value are adjustment amounts.

2. The power supply device according to claim 1, characterized in that, the loop selection module is further used to obtain a fourth value of the driving module in the previous cycle. The loop selection module is further used to add the first value, the second value, and the third value to the fourth value respectively, obtain the maximum value or minimum value of the first value, the second value, and the third value after adding to the fourth value, and transmit the maximum value or minimum value to the data holding module.

3. The power supply device according to claim 1 or 2, characterized in that, the data update unit is used to determine the loop selected by the loop selection module and determine the corresponding update frequency according to the loop, and output the update frequency to the data holding module; wherein, the first voltage control loop, the second voltage control loop, and the current control loop respectively correspond to different update frequencies.

4. The power supply device according to claim 3, wherein the data update unit determines the loop selected by the loop selection module according to the maximum value or minimum value of the first value, the second value, and the third value.

5. The power supply device according to claim 1 or 2, characterized in that, the loop selection module further includes a limiting unit, and the limiting unit is used to limit the first value, the second value, and the third value within a preset range; or Limit the first value, the second value, and the third value after signal processing within a preset range.

6. The power supply device according to claim 1, characterized in that, The main power module includes an inverter unit and a motor unit, and the inverter unit and the motor unit are cascaded.

7. The power supply device according to claim 1, characterized in that The power supply device further includes a reference value setting module, and the reference value setting module is configured to output a first voltage reference value, a second voltage reference value, and an output current reference value.

8. The power supply device according to claim 3, wherein The first value, the second value, and the third value are duty cycle adjustment amounts; The fourth value is the duty cycle of the previous cycle of the drive module.

9. A new energy vehicle, characterized in that, It includes the power supply device according to any one of claims 1-8.

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