Electric energy conversion control system and method and vehicle

Abstract

The invention provides an electric energy conversion control system and method and a vehicle, the electric energy conversion control system comprises a booster circuit, an inverter, a fault detection circuit and a controller, and the fault detection circuit is used for performing overvoltage fault detection on the booster circuit. The controller is used for controlling the booster circuit to execute a tube closing action and controlling the inverter to execute an active short-circuit action when the output signal of the fault detection circuit represents that the booster circuit has the overvoltage fault, so that when the overvoltage fault occurs in the booster circuit, the controller controls the tube closing action of the booster circuit and the active short-circuit action of the inverter at the same time; according to the electric energy conversion control system, the situation that the output voltage of the booster circuit is further raised due to the fact that only the booster circuit or the inverter is subjected to fault post-processing can be effectively avoided, so that the risk that the inverter is irreversibly damaged due to the fact that the output voltage of the booster circuit is abnormally raised can be effectively reduced, and then the operation safety of the electric energy conversion control system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric energy conversion, and in particular to an electric energy conversion control system and method and a vehicle. BACKGROUND

[0002] In an electric energy conversion control system with a boost circuit, the boost circuit and an inverter are connected in sequence. The boost circuit can raise a lower power supply voltage to different voltage points, and supply power to a load after electric energy conversion (for example, converting direct current into alternating current) by the inverter, so as to be applicable to occasions requiring higher voltage, and energy loss is low and the structure is simple, thereby being widely used in various fields.

[0003] At present, in the case of detecting a boost circuit fault, the boost circuit is usually controlled to perform a gate turn-off action. At this time, the energy transmission path between the load and the power supply unit is lost. If the inverter is switched from performing an ASC (Active Short Circuit) action to performing an FW (Freewheel) action, the output voltage of the boost circuit will be further raised, thereby easily causing irreversible damage to the inverter, and the running safety of the electric energy conversion control system cannot be guaranteed. SUMMARY

[0004] To solve the above technical problems, the present application provides an electric energy conversion control system and method and a vehicle, to solve the problem that in the prior art, after the boost circuit is turned off due to a fault, the inverter is easily damaged irreversibly.

[0005] To achieve the above technical purposes, the embodiments of the present application provide the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide an electric energy conversion control system, comprising a boost circuit, an inverter, a fault detection circuit and a controller, wherein the boost circuit is connected to the inverter, the fault detection circuit is connected to the boost circuit, and the controller is connected to the boost circuit, the inverter and the fault detection circuit respectively;

[0007] The fault detection circuit is configured to perform overvoltage fault detection on the boost circuit.

[0008] The controller is configured to control the boost circuit to perform a gate turn-off action and control the inverter to perform an active short circuit action when an output signal of the fault detection circuit indicates that the boost circuit has an overvoltage fault.

[0009] In an embodiment, the fault detection circuit is further connected to the boost circuit and the inverter.

[0010] The output signal of the fault detection circuit is used to trigger the boost circuit to perform a tube-off action and trigger the inverter to perform an active short-circuit action when the boost circuit has an overvoltage fault.

[0011] In an embodiment, the circuit further comprises a latch circuit connected to the fault detection circuit, the boost circuit and the inverter respectively.

[0012] The output signal of the fault detection circuit is used to trigger the latch circuit to perform fault latching when the boost circuit has an overvoltage fault.

[0013] The latch circuit is used to control the boost circuit to remain in a tube-off state and control the inverter to remain in an active short-circuit state in a fault latching state.

[0014] In an embodiment, the controller is further connected to the latch circuit.

[0015] The controller is further used to obtain target data after controlling the boost circuit to perform a tube-off action and controlling the inverter to perform an active short-circuit action, and output a fault clearing request signal to the latch circuit when it is determined that the boost circuit meets a fault clearing condition based on the target data. The target data includes at least one of the operating state of the boost circuit, the power supply state of a power supply unit connected to the input end of the boost circuit and the operating state of a load connected to the output end of the inverter.

[0016] The fault clearing request signal is used to trigger the latch circuit to clear the overvoltage fault of the boost circuit.

[0017] In an embodiment, the controller is specifically used to:

[0018] Determine whether the boost circuit meets the fault clearing condition based on whether the boost circuit meets a fault recovery condition and a determination result of whether the boost circuit meets the fault recovery condition.

[0019] In an embodiment, the controller is specifically used to:

[0020] When the boost circuit meets the fault recovery condition, obtain a current fault clearing frequency of the boost circuit and determine whether the boost circuit meets the fault clearing condition based on the current fault clearing frequency of the boost circuit.

[0021] When the boost circuit does not meet the fault recovery condition, determine that the boost circuit does not meet the fault clearing condition.

[0022] In an embodiment, the controller is specifically configured to:

[0023] when the current fault clearing times of the boost circuit is less than the preset fault clearing times limit, determining that the boost circuit satisfies the fault clearing condition;

[0024] when the current fault clearing times of the boost circuit is greater than or equal to the preset fault clearing times limit, determining that the boost circuit does not satisfy the fault clearing condition.

[0025] In a second aspect, the embodiments of the present specification provide an electric energy conversion control method, applied to the electric energy conversion control system as described in any one of the above, the method comprising:

[0026] obtaining an output signal of the fault detection circuit, the fault detection circuit being configured to perform overvoltage fault detection on the boost circuit;

[0027] when the output signal of the fault detection circuit indicates that the boost circuit has an overvoltage fault, controlling the boost circuit to perform a gate-off action, and controlling the inverter to perform an active short-circuit action.

[0028] In an embodiment, the method further comprises:

[0029] after controlling the boost circuit to perform a gate-off action and controlling the inverter to perform an active short-circuit action, obtaining target data; the target data comprising at least one of the operating state of the boost circuit, the power supply state of a power supply unit connected to the input end of the boost circuit, and the operating state of a load connected to the output end of the inverter;

[0030] when it is determined based on the target data that the boost circuit satisfies a fault clearing condition, outputting a fault clearing request signal to the latch circuit, the fault clearing request signal being configured to trigger the latch circuit to clear the overvoltage fault of the boost circuit.

[0031] In a third aspect, the embodiments of the present specification provide a vehicle, comprising the electric energy conversion control system as described in any one of the above.

[0032] In a fourth aspect, the embodiments of the present specification provide a computer readable storage medium, having a computer program stored thereon, the computer program being executed by a processor to implement the electric energy conversion control method as described in any one of the above.

[0033] In a fifth aspect, an embodiment of the present specification provides a computer program product or computer program, the computer program product comprising a computer program stored in a computer readable storage medium; the processor of the computer device reads the computer program from the computer readable storage medium, and the processor executes the computer program to implement the power conversion control method according to any one of the above.

[0034] From the above technical solution, it can be seen that the embodiment of the present application provides an electric energy conversion control system, method and vehicle. The electric energy conversion control system comprises a boost circuit, an inverter, a fault detection circuit and a controller. The boost circuit is connected with the inverter. The fault detection circuit is connected with the boost circuit. The controller is connected with the boost circuit, the inverter and the fault detection circuit respectively. The fault detection circuit is used for overvoltage fault detection of the boost circuit. The controller is used for controlling the boost circuit to perform a valve closing action and controlling the inverter to perform an active short circuit action when the output signal of the fault detection circuit indicates that the boost circuit has an overvoltage fault. Thus, the controller can effectively avoid the further lifting of the output voltage of the boost circuit caused by the post-fault processing of only the boost circuit or the inverter, thereby effectively reducing the risk of irreversible damage to the inverter caused by the abnormal lifting of the output voltage of the boost circuit, and further improving the operation safety of the electric energy conversion control system. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0036] Figure 1 It is a schematic diagram of the connection of the existing boost circuit and the inverter.

[0037] Figure 2 It is a structural schematic diagram of an electric energy conversion control system provided by an embodiment of the present specification.

[0038] Figure 3 It is a structural schematic diagram of a fault detection circuit provided by an embodiment of the present specification.

[0039] Figure 4 It is another structural schematic diagram of an electric energy conversion control system provided by an embodiment of the present specification.

[0040] Figure 5A schematic structural diagram of a latch circuit provided for an embodiment of the present specification.

[0041] Figure 6 A flowchart of an electric energy conversion control method provided for an embodiment of the present specification. DETAILED DESCRIPTION

[0042] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present specification shall be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of the present specification belong. The terms "first", "second", and similar terms used in the embodiments of the present specification do not denote any order, quantity, or importance, but are used to avoid confusion among the constituent elements.

[0043] Unless otherwise required by context, "plurality" in the specification means "at least two", and "comprising" is to be interpreted as open, inclusive meaning, i.e. "including but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to mean that the particular feature, structure, material or characteristic associated with that embodiment or example includes in at least one embodiment or example of the specification. The illustrative representation of the above terms does not necessarily refer to the same embodiment or example.

[0044] The technical solutions in the embodiments of the present specification will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present specification. Obviously, the described embodiments are only part of the embodiments of the present specification, not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present specification.

[0045] SUMMARY

[0046] As described in the background, in an electric energy conversion control system with a boost circuit, including a boost circuit and an inverter connected in sequence, the boost circuit can raise a lower power supply voltage to different voltage points, and supply power to the load after electric energy conversion (such as converting direct current into alternating current) through the inverter, so as to be suitable for occasions requiring higher voltage, with low energy loss and simple structure, thus being widely used in various fields.

[0047] For example, with the rapid update iteration of new energy vehicles, the vehicle has more stringent requirements on the electric drive assembly system, requiring the electric drive assembly system to be more compact, lower in cost and higher in efficiency. To meet this requirement, a boost circuit is usually integrated in the electric drive assembly system to raise the output voltage of the power battery to different voltage points through the boost circuit, and convert the direct current output by the boost circuit into alternating current through an inverter to power the drive motor and generator. Through this scheme, a smaller and more compact specification of the motor can be selected to meet the power requirement under the same power requirement, thereby realizing a more compact structure, lower cost and higher efficiency of the electric drive assembly system.

[0048] The boost circuit can include at least one phase boost sub-circuit, and in the case where the number of boost sub-circuits is greater than or equal to 2, the phase boost sub-circuits can be connected in parallel. Each phase boost sub-circuit includes a boost inductor and a switch circuit connected in sequence, and the switch circuit includes an upper bridge arm and a lower bridge arm, each of which is provided with a switch tube such as an IGBT (Insulated Gate Bipolar Transistor) to control the on-off of the corresponding bridge arm through the switch tube. In implementation, for any boost sub-circuit, the charging and discharging of the boost inductor in the boost sub-circuit can be realized by the alternating conduction of the upper and lower bridge arms of the boost sub-circuit, thereby realizing the lifting of the output voltage of the boost circuit. Thus, by adjusting the duty cycle of the upper bridge arm or the lower bridge arm in the boost sub-circuit, different voltages can be output by the boost circuit.

[0049] Meanwhile, the inverter can include at least one sub-inverter, and different sub-inverters can be arranged in parallel to supply power to different loads through different sub-inverters. Each sub-inverter includes a U-phase bridge arm, a V-phase bridge arm and a W-phase bridge arm arranged in parallel, and each phase bridge arm includes two switch tubes arranged in series, the connection point of the two switch tubes being connected to the load. In implementation, the amplitude and frequency of the output voltage of the sub-inverter can be adjusted by controlling the duty cycle of the two switch tubes in each phase bridge arm.

[0050] Taking a dual-phase interleaved parallel boost circuit for the boost circuit and two sub-inverters respectively used to power two motors of the vehicle for the inverter as an example, the connection mode of the boost circuit and the inverter is exemplarily described. As shown in FIG. 1, the boost circuit includes two phase boost sub-circuits connected in parallel, and each phase boost sub-circuit includes a boost inductor and a switch circuit connected in sequence. Figure 1As shown, the positive input end IN POS and the negative input end IN NEG of the boost circuit can be connected to the positive and negative of a power supply unit (such as a power battery of a vehicle) respectively, that is, the input voltage of the boost circuit is the output voltage of the power supply unit, the first capacitor C1 is connected between the positive input end IN POS and the negative input end IN NEG of the boost circuit, and the second capacitor C2 is connected between the positive output end OUT POS and the negative output end OUT NEG of the boost circuit. The boost circuit includes two boost sub-circuits arranged in parallel, one boost sub-circuit includes a first boost inductor L1 and a first switch Q1 and a second switch Q2 connected in series, and the other boost sub-circuit includes a second boost inductor L2 and a third switch Q3 and a fourth switch Q4 connected in series; wherein one end of the first boost inductor L1 and one end of the second boost inductor L2 are connected to the connection point of the positive input end IN POS and the first capacitor C1, the other end of the first boost inductor L1 is connected to the connection point of the first switch Q1 and the second switch Q2, and the other end of the second boost inductor L2 is connected to the connection point of the third switch Q3 and the fourth switch Q4; the other end of the first switch Q1 and the other end of the third switch Q3 are connected to the connection point of the positive output end OUT POS and the second capacitor C2, the other end of the second switch Q2 and the other end of the fourth switch Q4 are connected to the connection point of the negative output end OUT NEG and the second capacitor C2, and the negative output end OUT NEG is connected to the negative input end IN NEG.

[0051] One of the sub-inverters in the inverter is used to supply power to the first motor M1 of the vehicle, the U-phase bridge arm of the sub-inverter includes a fifth switch Q5 and a sixth switch Q6 connected in series, the V-phase bridge arm includes a seventh switch Q7 and an eighth switch Q8 connected in series, and the W-phase bridge arm includes a ninth switch Q9 and a tenth switch Q 10 The connection point of the fifth switch Q5 and the sixth switch Q6, the connection point of the seventh switch Q7 and the eighth switch Q8, and the connection point of the ninth switch Q9 and the tenth switch Q 10 in the sub-inverter are connected to the U-phase power supply port, the V-phase power supply port, and the W-phase power supply port of the first motor M1 respectively. Another sub-inverter in the inverter is used to supply power to the second motor M2 of the vehicle, the U-phase bridge arm of the sub-inverter includes an eleventh switch Q 11 and a twelfth switch Q 12 connected in series, the V-phase bridge arm includes a thirteenth switch Q 13 and a fourteenth switch Q 14 connected in series, and the W-phase bridge arm includes a fifteenth switch Q 15 and a sixteenth switch Q 16 connected in series, and the connection point of the eleventh switch Q 11The connection point of the twelfth switch tube Q 12 The connection point of the thirteenth switch tube Q 13 The connection point of the fourteenth switch tube Q 14 The connection point of the fifteenth switch tube Q 15 The connection point of the sixteenth switch tube Q 16 The U-phase power supply port, the V-phase power supply port and the W-phase power supply port of the second motor M2 are connected with the connection point of the twelfth switch tube Q

[0052] At present, in the case of detecting the fault of the boost circuit, the boost circuit is usually controlled to perform the switch-off action, at this time, the energy transmission path between the load and the power supply unit is lost, if the inverter is switched from performing the ASC action to performing the FW action, the current generated when the inverter is switched from the ASC action to the FW action cannot flow back to the power supply unit to charge the second capacitor C2 at the rear end of the boost circuit, thereby causing the output voltage of the boost circuit to further rise, and the abnormal rise of the output voltage of the boost circuit is easy to cause irreversible damage to the inverter, thereby failing to guarantee the operation safety of the electric energy conversion control system.

[0053] In order to solve the problem that the traditional method is easy to cause irreversible damage to the inverter after the boost circuit is switched off due to a fault, in the technical scheme of the present application, an electric energy conversion control system is provided, the system comprising a boost circuit, an inverter, a fault detection circuit and a controller, the boost circuit being connected with the inverter, the fault detection circuit being connected with the boost circuit, the controller being connected with the boost circuit, the inverter and the fault detection circuit respectively, the fault detection circuit being configured to perform overvoltage fault detection on the boost circuit, and the controller being configured to control the boost circuit to perform a switch-off action when the output signal of the fault detection circuit indicates that the boost circuit has an overvoltage fault, and to control the inverter to perform an active short-circuit action, thereby the controller can effectively avoid the further rise of the output voltage of the boost circuit caused by the post-fault processing of only the boost circuit or the inverter, thereby effectively reducing the risk of irreversible damage to the inverter caused by the abnormal rise of the output voltage of the boost circuit, and thereby improving the operation safety of the electric energy conversion control system.

[0054] Based on the above inventive concept, the electric energy conversion control system provided by the embodiments of the present application is exemplarily described below.

[0055] Exemplary system

[0056] The embodiments of the present application provide an electric energy conversion control system, which comprises a boost circuit, an inverter, a fault detection circuit and a controller. Figure 2As shown, it includes a boost circuit 201, an inverter 202, a fault detection circuit 203 and a controller 204, wherein the boost circuit 201 is connected to the inverter 202, the fault detection circuit 203 is connected to the boost circuit 201, and the controller 204 is connected to the boost circuit 201, the inverter 202 and the fault detection circuit 203 respectively;

[0057] The fault detection circuit 203 is used to perform overvoltage fault detection on the boost circuit 201;

[0058] The controller 204 is configured to control the boost circuit 201 to shut down and the inverter 202 to perform an active short circuit when the output signal of the fault detection circuit 203 indicates that the boost circuit 201 has an overvoltage fault.

[0059] Specifically, the boost circuit 201 may include a boost main circuit and a boost circuit driving unit ( Figure 1 The boost circuit driving unit is not shown in the figure), the input end of the boost main circuit can be connected to the power supply unit to raise the voltage output by the power supply unit to the target voltage. The boost main circuit can include at least one phase boost sub-circuit, and each phase boost sub-circuit includes a boost inductor and a switching circuit connected in sequence, and the switching circuit includes an upper bridge arm and a lower bridge arm. The upper bridge arm and the lower bridge arm are each provided with a switching tube to control the on and off of the corresponding bridge arm through the switching tube, wherein, during the operation of the boost main circuit, the upper bridge arm and the lower bridge arm are alternately turned on, and the output voltage of the boost main circuit is controlled by controlling the duty cycle of the upper bridge arm and the lower bridge arm. Optionally, the boost main circuit can adopt a two-phase staggered parallel boost circuit. The boost circuit driving unit can be connected to each switching tube in the boost main circuit to drive the on and off of each switching tube in the boost main circuit through the boost circuit driving unit.

[0060] The inverter 202 may include an inverter main circuit and an inverter circuit drive unit ( Figure 1The input end of the inverter main circuit is connected with the output end of the boost main circuit, and the inverter main circuit is used for converting the output voltage of the boost main circuit to supply power to the load. For example, the inverter main circuit converts the direct current output by the boost main circuit into alternating current. The inverter main circuit can include at least one sub-inverter circuit. The input end of each sub-inverter circuit can be connected with the output end of the boost main circuit, and the output end of each sub-inverter circuit can be connected with a different load to supply power to the connected load through the sub-inverter circuit. Each sub-inverter circuit can include a U-phase bridge arm, a V-phase bridge arm and a W-phase bridge arm arranged in parallel. Each phase bridge arm includes two switch tubes arranged in series. The two switch tubes are used to control the on-off of the upper bridge arm and the lower bridge arm in the corresponding bridge arm, respectively. The connection point of the two switch tubes is connected with the corresponding power supply port in the load. The inverter circuit driving unit is connected with each switch tube in the inverter main circuit to drive the on-off of each switch tube in the inverter main circuit through the inverter circuit driving unit.

[0061] The input end of the fault detection circuit 203 can be connected with the output end of the boost main circuit to perform overvoltage fault detection on the boost main circuit through the fault detection circuit 203. The output signal of the fault detection circuit 203 can represent whether the boost main circuit has an overvoltage fault. For example, when the output signal of the fault detection circuit 203 is a high-level signal, it indicates that the boost main circuit does not have an overvoltage fault. When the output signal of the fault detection circuit 203 is a low-level signal, it indicates that the boost main circuit has an overvoltage fault.

[0062] In the implementation, the controller 204 can be connected with the output end of the fault detection circuit 203 to obtain the output signal of the fault detection circuit 203 in real time. Meanwhile, the controller 204 can also be connected with the boost circuit 201 and the inverter 202 to control the boost circuit 201 and the inverter 202 through the controller 204.

[0063] Optionally, the controller 204 can be connected with the boost circuit driving unit and the inverter circuit driving unit, respectively, to send control signals to the boost circuit driving unit and the inverter circuit driving unit, drive the on-off of the switch tubes in the boost main circuit through the boost circuit driving unit, and drive the on-off of the switch tubes in the inverter main circuit through the inverter circuit driving unit, thereby realizing the control of the boost main circuit and the inverter main circuit.

[0064] In implementation, the controller 204 can determine in real time whether the output signal of the fault detection circuit 203 represents that the overvoltage fault exists in the boost main circuit. When the output signal of the fault detection circuit 203 represents that the overvoltage fault does not exist in the boost main circuit, the determination of whether the output signal of the fault detection circuit 203 represents that the overvoltage fault exists in the boost main circuit can be continuously performed; when the output signal of the fault detection circuit 203 represents that the overvoltage fault exists in the boost main circuit, the boost circuit 201 can be controlled to perform the switch-off action, and the inverter 202 can be controlled to perform the active short-circuit action.

[0065] For example, when the controller 204 identifies that the overvoltage fault exists in the boost main circuit, the controller 204 can simultaneously issue a switch-off instruction to the boost circuit driving unit and issue an active short-circuit instruction to the inverter circuit driving unit, so as to drive all the switch tubes in the boost main circuit to be turned off by the boost circuit driving unit, thereby disconnecting the energy transmission path between the inverter 202 and the power supply unit, and driving the upper bridge arm in each bridge arm in the inverter main circuit to be short-circuited or the lower bridge arm in each bridge arm in the inverter main circuit to be short-circuited by the inverter circuit driving unit. That is, when the overvoltage fault occurs in the boost circuit 201, the controller 204 simultaneously controls the boost circuit 201 and the inverter 202 to perform post-fault processing, thereby effectively avoiding the further rise of the output voltage of the boost circuit 201 caused by the post-fault processing of only the boost circuit 201 or the inverter 202, reducing the risk of irreversible damage of the inverter 202 caused by the abnormal rise of the output voltage of the boost circuit 201, and improving the operation safety of the electric energy conversion control system.

[0066] In one possible implementation, the fault detection circuit 203 is further connected to the boost circuit 201 and the inverter 202.

[0067] The output signal of the fault detection circuit 203 is used to trigger the boost circuit 201 to perform the switch-off action and trigger the inverter 202 to perform the active short-circuit action when the overvoltage fault exists in the boost circuit 201.

[0068] Specifically, the output end of the fault detection circuit 203 can be further connected to the boost circuit driving unit and the inverter circuit driving unit, so as to transmit the output signal of the fault detection circuit 203 to the boost circuit driving unit and the inverter 202 driving unit, thereby directly triggering the boost circuit driving unit to drive the switch tubes in the boost main circuit to be turned on or turned off and triggering the inverter circuit driving unit to drive the switch tubes in the inverter main circuit to be turned on or turned off by the output signal of the fault detection circuit 203.

[0069] In the implementation, when overvoltage fault exists in the boost main circuit, the output signal of the fault detection circuit 203 can be a low-level signal, at this time, the output signal of the fault detection circuit 203 can trigger the boost circuit driving unit to drive all the switch tubes in the boost main circuit to be turned off, so as to disconnect the energy transmission path between the inverter 202 and the power supply unit, and drive the upper bridge arm in each bridge arm in the inverter main circuit to be short-circuited or the lower bridge arm to be short-circuited, thereby realizing the hardware control of the boost circuit 201 and the inverter 202 to perform post-fault processing by the fault detection circuit 203, fast response speed, and realizing the redundant control of the post-fault processing of the boost circuit 201 and the inverter 202, so as to effectively ensure the operation safety of the electric energy conversion control system.

[0070] It can be understood that when overvoltage fault does not exist in the boost main circuit, the output signal of the fault detection circuit 203 can be a high-level signal, at this time, the output signal of the fault detection circuit 203 does not affect the normal operation of the boost circuit driving unit and the inverter circuit driving unit, thereby ensuring the effective operation of the electric energy conversion control system.

[0071] Optionally, the circuit topology of the fault detection circuit 203 can be as shown in Figure 3 , including a comparator U1 and a seventeenth switch tube Q 17 connected in sequence. out The positive input end of the comparator U1 is connected with the output end of the boost main circuit through a first resistor R1, for inputting the output voltage V safe of the boost main circuit; the connection point of the first resistor R1 and the positive input end of the comparator U1 is grounded through a third capacitor C3, so as to filter the signal input to the positive input end of the comparator U1 through the third capacitor C3; the negative input end of the comparator U1 is connected with a target voltage source V safe through a second resistor R2; the connection point of the second resistor R2 and the negative input end of the comparator U1 is grounded through a third resistor R3 and a fourth capacitor C4 connected in parallel, so as to filter the signal input to the negative input end of the comparator U1 through the third resistor R3 and the fourth capacitor C4; the power supply end of the comparator U1 is connected with the target voltage source V 17 through a fourth resistor R4; the connection point of the power supply end of the comparator U1 and the fourth resistor R4 is grounded through a fifth capacitor C5, so as to filter the signal input to the power supply end of the comparator U1 through the fifth capacitor C5; the output end of the comparator U1 is connected with the base of the seventeenth switch tube Q 17 through a fifth resistor R5; the connection point of the fifth resistor R5 and the base of the seventeenth switch tube Q 17The signal of the base of the seventeenth switch tube Q is filtered; 17 The emitter of the seventeenth switch tube Q 17 The collector of the safe Connected, the seventeenth switch tube Q 17 The connection point between the collector of the seventh resistor R7 and the output terminal of the fault detection circuit 203 is connected through the eighth resistor R8. The output signal S of the output terminal of the fault detection circuit 203 is fault Used to indicate whether there is an overvoltage fault in the boost main circuit; wherein, the connection point between the eighth resistor R8 and the output end of the fault detection circuit 203 is grounded through the seventh capacitor C7, so that the output signal of the fault detection circuit 203 is filtered through the seventh capacitor C7.

[0072] In the implementation, the output voltage V out Greater than V safe When the comparator U1 outputs a high level signal, the seventeenth switch tube Q 17 The output signal S of the fault detection circuit 203 is turned on. fault It is a low level signal, indicating that there is an overvoltage fault in the boost main circuit; when the output voltage V out Less than or equal to V safe When the comparator U1 outputs a low level signal, the seventeenth switch tube Q 17 The output signal S of the fault detection circuit 203 is turned off. fault It is a high-level signal, indicating that there is no overvoltage fault in the boost main circuit.

[0073] In one possible implementation, Figure 4 As shown, the electric energy conversion control system further includes a latch circuit 205, and the latch circuit 205 is connected to the fault detection circuit 203, the boost circuit 201 and the inverter 202 respectively;

[0074] The output signal of the fault detection circuit 203 is used to trigger the latch circuit 205 to perform fault latching when an overvoltage fault occurs in the boost circuit 201;

[0075] The latch circuit 205 is used to control the boost circuit 201 to remain in the off state and control the inverter 202 to remain in the active short-circuit state in the fault latch state.

[0076] Specifically, the input end of the latch circuit 205 is connected to the output end of the fault detection circuit 203 to transmit the output signal of the fault detection circuit 203 to the latch circuit 205. Then, when an overvoltage fault occurs in the boost main circuit, the output signal of the fault detection circuit 203 can directly trigger the latch circuit 205 to latch the overvoltage fault of the boost main circuit.

[0077] In an embodiment, when the overvoltage fault exists in the boost main circuit, the output signal of the fault detection circuit 203 can be a low-level signal, and at this time, the output signal of the fault detection circuit 203 can trigger the latch circuit 205 to latch the overvoltage fault of the boost main circuit. The output end of the latch circuit 205 can be connected to the boost circuit driving unit and the inverter circuit driving unit respectively, and the latch circuit 205 can continuously output a low-level signal to the boost circuit driving unit and the inverter circuit driving unit when it is in a fault latching state, that is, when the overvoltage fault exists in the boost main circuit, the signal output by the latch circuit 205 to the boost circuit driving unit and the inverter circuit driving unit is the same as the signal output by the fault detection circuit 203 to the boost circuit driving unit and the inverter circuit driving unit. Therefore, when the latch circuit 205 is in a fault latching state, the boost main circuit can be controlled to remain in a tube-off state, and the inverter main circuit can be controlled to remain in an active short-circuit state, thereby effectively avoiding the damage of the power conversion control system caused by the continuous operation of the boost main circuit and the inverter main circuit when the fault of the boost main circuit is not cleared, and further ensuring the safety of the power conversion control system.

[0078] It can be understood that when the overvoltage fault does not exist in the boost main circuit, the output signal of the fault detection circuit 203 can be a high-level signal, and at this time, the latch circuit 205 does not perform fault latching, that is, the latch circuit 205 can output a high-level signal to the boost circuit driving unit and the inverter circuit driving unit, and the output signal of the latch circuit 205 does not affect the normal operation of the boost circuit driving unit and the inverter circuit driving unit, thereby ensuring the effective operation of the power conversion control system.

[0079] In an embodiment, the controller 204 is further connected to the latch circuit 205.

[0080] The controller 204 is further configured to, after controlling the boost circuit 201 to perform a tube-off action and controlling the inverter 202 to perform an active short-circuit action, acquire target data, and output a fault clearing request signal to the latch circuit 205 when it is determined based on the target data that the boost circuit 201 satisfies a fault clearing condition; the target data includes at least one of the operating state of the boost circuit 201, the power supply state of a power supply unit connected to the input end of the boost circuit 201, and the operating state of a load connected to the output end of the inverter 202.

[0081] The fault clearing request signal is used to trigger the latch circuit 205 to clear the overvoltage fault of the boost circuit 201.

[0082] Specifically, the controller 204 can also be connected with the latch circuit 205 to control the latch circuit 205 to perform fault clearing through the controller 204.

[0083] In implementation, the controller 204 can acquire target data in real time after controlling the boost circuit 201 to perform the valve action and controlling the inverter 202 to perform the active short-circuit action, and determine whether the boost circuit 201 meets the fault clearing condition according to the target data. For example, the controller 204 can determine whether the boost circuit 201 meets the fault recovery condition according to the target data, and further determine whether the boost circuit 201 meets the fault clearing condition according to the determination result of whether the boost circuit 201 meets the fault recovery condition. Alternatively, the controller 204 can directly determine whether the boost circuit 201 meets the fault clearing condition according to the target data.

[0084] The target data can include the operating state of the boost circuit 201, and the operating state of the boost circuit 201 can include at least one of the output voltage, the output current and the working mode of the boost main circuit. Alternatively, the controller 204 can determine whether the output voltage of the boost main circuit meets the fault recovery condition or the fault clearing condition according to the comparison result of the output voltage of the boost main circuit and a preset voltage value, and / or determine whether the output voltage of the boost main circuit meets the fault recovery condition or the fault clearing condition according to the output signal of the fault detection circuit 203. Meanwhile, the controller 204 can determine whether the output current of the boost main circuit meets the fault recovery condition or the fault clearing condition according to the comparison result of the output current of the boost main circuit and a preset current value. In addition, the controller 204 can determine whether the working mode of the boost main circuit meets the fault recovery condition or the fault clearing condition according to the consistency of the working mode of the boost main circuit and a preset mode.

[0085] The power supply unit connected with the input end of the boost circuit 201 is a power supply unit connected with the input end of the boost main circuit, and the boost main circuit is configured to lift the voltage output by the power supply unit to a target voltage and output to the inverter main circuit. The target data can also include the power supply state of the power supply unit. In implementation, the controller 204 can determine whether the power supply state of the power supply unit meets the fault recovery condition or the fault clearing condition according to the on-off state of the main relay arranged on the connection line between the power supply unit and the boost main circuit, and / or determine whether the power supply state of the power supply unit meets the fault recovery condition or the fault clearing condition according to the input voltage of the boost main circuit.

[0086] The load connected to the output end of the inverter 202 is the load connected to the output end of the inverter main circuit. For example, in the electric drive assembly system of the vehicle, the load can be the motor of the vehicle. The inverter main circuit is used to convert the output voltage of the boost main circuit into electric energy to supply power to the load. The target data can also include the operating status of the load. The operating status of the load can include the operating mode of the load, such as working mode, stop mode, fault mode, standby mode, etc. The operating status of the load can also include the operating parameter status of the load, such as voltage state, current state, speed state, temperature state, etc. In implementation, it can be determined whether the operating status of the load meets the fault recovery condition or the fault clearing condition based on the consistency between the operating status of the load and the preset operating status.

[0087] Optionally, when the number of target data is multiple, when each data satisfies the fault recovery condition or fault clearing condition, it can be determined that the boost circuit 201 satisfies the fault recovery condition or fault clearing condition; otherwise, it is determined that the boost circuit 201 does not satisfy the fault recovery condition or fault clearing condition, thereby effectively ensuring the accuracy of the determination result of whether the boost circuit 201 satisfies the fault clearing condition.

[0088] In practice, when the controller 204 determines that the boost circuit 201 does not meet the fault-clearing requirements, it can continuously acquire target data and determine, based on the target data, whether the boost circuit 201 meets the fault-clearing requirements. Furthermore, when the controller 204 determines that the boost circuit 201 meets the fault-clearing requirements, it can send a fault-clearing signal to the latch circuit 205. The fault-clearing signal can be used to trigger the latch circuit 205 to clear the overvoltage fault in the boost circuit 201. That is, after the latch circuit 205 clears the overvoltage fault in the boost circuit 201, the boost circuit 201 and the inverter 202 can operate normally, thereby effectively ensuring the safe and reliable operation of the electric energy conversion control system.

[0089] Optionally, the circuit topology of the latch circuit 205 may be as follows: Figure 5 As shown, it includes a first logic AND circuit A1, a second logic AND circuit A2 and an inverter U2, wherein the first input end of the first logic AND circuit A1 is connected to the controller 204 through the ninth resistor R9, so as to output the fault clearing request signal S through the controller 204. RST To the first logic AND circuit A1, the connection point between the first input terminal of the first logic AND circuit A1 and the ninth resistor R9 is connected through the tenth resistor R 10 With the target voltage source V safe connected to the target voltage source V safe and the tenth resistor R 10 Provide a high level signal to the first input terminal of the first logic AND circuit A1; at the same time, the first input terminal of the first logic AND circuit A1 is connected to the tenth resistor R10 The connection point of is grounded through the eighth capacitor C8, so that the signal input to the first input terminal of the first logic AND circuit A1 is filtered through the eighth capacitor C8. The second input terminal of the first logic AND circuit A1 is connected to the second output port 2Y of the inverter U2, so that the output signal of the second output port 2Y of the inverter U2 is input to the second input terminal of the first logic AND circuit A1. In addition, the power input terminal of the first logic AND circuit A1 is connected to the target voltage source V safe connected to the target voltage source V safe The first logic AND circuit A1 is powered.

[0090] The first input terminal and the second input terminal of the second logic AND circuit A2 are connected to the output terminal of the fault detection circuit 203 and the first output port 1Y of the inverter U2 respectively, so as to convert the output signal S of the fault detection circuit 203 into fault The first input terminal of the second logic AND circuit A2 is input, and the output signal of the first output port 1Y of the inverter U2 is input to the second input terminal of the second logic AND circuit A2.

[0091] The output end of the first logic AND circuit A1 and the output end of the second logic AND circuit A2 are connected to the first input port 1A and the second input port 2A of the inverter U2 respectively. The power supply port VCC of the inverter U2 is connected to the target voltage source V safe connected to the target voltage source V safe Power the inverter U2; the power port VCC of the inverter U2 is connected to the target voltage source V safe The connection point is connected through the tenth capacitor C 10 grounded through the tenth capacitor C 10 The power supply signal of the inverter U2 is filtered. The first output port 1Y of the inverter U2 is connected to the boost circuit drive unit and the inverter circuit drive unit, respectively. The inverter U2 can be a dual-path Schmitt trigger inverter, i.e., the output signal of the first output port 1Y of the inverter U2 is the inverse of the input signal of the first input port 1A of the inverter U2, and the output signal of the second output port 2Y of the inverter U2 is the inverse of the input signal of the second input port 2A of the inverter U2.

[0092] In practice, the first input terminal of the first logic AND circuit A1 is at the target voltage source V safe and the tenth resistor R 10 Under the action of the default input high level signal, at the same time, when the power conversion control system is operating normally, the first output port 1Y of the inverter U2 outputs a high level signal. At this time, the output voltage V out Greater than V safe When the output signal S of the fault detection circuit 203 is faultThe low-level signal indicates that overvoltage fault exists in the boost main circuit, the second output port 2Y of the inverter U2 outputs a high-level signal, and then the second input end of the first logic and circuit A1 inputs a high-level signal, the first output port 1Y of the inverter U2 outputs a low-level signal, at this time, no matter whether the output signal S fault The high-level signal or the low-level signal, the second output port 2Y of the inverter U2 outputs a high-level signal, that is, the first output port 1Y of the inverter U2 continuously outputs a low-level signal, and the fault latching is realized. When the controller 204 outputs a low-level fault clearing request signal to the first input end of the first logic and circuit A1, the first logic and circuit A1 outputs a low-level signal, so that the first output port 1Y of the inverter U2 outputs a high-level signal, and the fault clearing is realized.

[0093] In an embodiment, the controller 204 is specifically configured to:

[0094] Determine whether the boost circuit 201 meets the fault clearing condition based on the target data and the determination result of whether the boost circuit 201 meets the fault recovery condition.

[0095] Specifically, whether the boost circuit 201 meets the fault recovery condition can be determined based on the target data, wherein if the boost circuit 201 meets the fault recovery condition, it indicates that the fault of the boost main circuit has been recovered, and if the boost circuit 201 does not meet the fault recovery condition, it indicates that the fault of the boost main circuit has not been recovered.

[0096] In an embodiment, it can be determined that the boost circuit 201 meets the fault clearing condition when the boost circuit 201 meets the fault recovery condition, that is, after the fault recovery of the boost circuit 201, the fault clearing is performed to ensure the safe and reliable operation of the power conversion control system. Meanwhile, the current fault clearing times of the boost circuit 201 can be further determined when the boost circuit 201 meets the fault recovery condition, and whether the boost circuit 201 meets the fault clearing condition can be determined according to the current fault clearing times of the boost circuit 201, so as to ensure the safe and reliable operation of the power conversion control system.

[0097] In addition, when the boost circuit 201 does not meet the fault recovery condition, it is determined that the boost circuit 201 does not meet the fault clearing condition, that is, the fault latching is continuously performed to ensure the safety of the power conversion control system.

[0098] In an embodiment, the controller 204 is specifically configured to:

[0099] When the boost circuit 201 meets the fault recovery condition, a current fault clearing number of the boost circuit 201 is obtained, and whether the boost circuit 201 meets the fault clearing condition is determined based on the current fault clearing number of the boost circuit 201.

[0100] When the boost circuit 201 does not meet the fault recovery condition, it is determined that the boost circuit 201 does not meet the fault clearing condition.

[0101] Specifically, the current fault clearing number of the boost circuit 201 can be the number of times of executing fault clearing of the electric energy conversion control system in a current operation period. In implementation, when the controller 204 determines that the boost circuit 201 meets the fault recovery condition according to the target data, the current fault clearing number of the boost circuit 201 can be further obtained, and whether the boost circuit 201 meets the fault clearing condition can be determined according to the current fault clearing number of the boost circuit 201. For example, whether the boost circuit 201 meets the fault clearing condition can be determined based on a comparison result of the current fault clearing number of the boost circuit 201 and a preset fault clearing number limit value.

[0102] In addition, when the controller 204 determines that the boost circuit 201 does not meet the fault recovery condition according to the target data, it can be determined that the boost circuit 201 does not meet the fault clearing condition.

[0103] Therefore, by the embodiment of the application, the effectiveness of the determination result of whether the boost circuit 201 meets the fault clearing condition can be effectively improved, and the safe and reliable operation of the electric energy conversion control system can be ensured when the controller 204 controls the latch circuit to perform fault clearing according to the determination result of whether the fault clearing condition is met.

[0104] In a feasible implementation, the controller 204 is specifically configured to:

[0105] When the current fault clearing number of the boost circuit 201 is less than the preset fault clearing number limit value, it is determined that the boost circuit 201 meets the fault clearing condition;

[0106] When the current fault clearing number of the boost circuit 201 is greater than or equal to the preset fault clearing number limit value, it is determined that the boost circuit 201 does not meet the fault clearing condition.

[0107] Specifically, when the current fault clearing times of the boost circuit 201 is less than the preset fault clearing times limit value, it indicates that the boost circuit 201 does not frequently appear faults in the current running period of the electric energy conversion control system, at this time, it can be determined that the boost circuit 201 meets the fault clearing condition, and the controller 204 controls the latch circuit 205 to clear the overvoltage fault of the boost circuit 201, thereby ensuring the effective operation of the electric energy conversion control system.

[0108] When the current fault clearing times of the boost circuit 201 is greater than or equal to the preset fault clearing times limit value, it indicates that the boost circuit 201 frequently appears faults in the current running period of the electric energy conversion control system, at this time, it can be determined that the boost circuit 201 does not meet the fault clearing condition, that is, the electric energy conversion control system continues to maintain the fault latching state, at the same time, the controller 204 can generate an alarm signal and send it to the preset terminal to remind the relevant personnel to maintain the equipment in time. The preset terminal can be the central control screen of the vehicle, and can also be a mobile phone terminal, a cloud platform, etc., which can be set according to actual needs.

[0109] Therefore, by the embodiment scheme of the present application, the safe and reliable operation of the electric energy conversion control system can be effectively ensured.

[0110] Exemplary method

[0111] In one example embodiment of the present specification, an electric energy conversion control method is also provided, which is applied to the electric energy conversion control system as described in any one of the above embodiments, as shown in Figure 6 The method comprises:

[0112] S601, acquiring an output signal of the fault detection circuit 203, the fault detection circuit 203 is used for overvoltage fault detection of the boost circuit 201;

[0113] S602, when the output signal of the fault detection circuit 203 represents that the boost circuit 201 has overvoltage fault, controlling the boost circuit 201 to perform the gate turn-off action, and controlling the inverter 202 to perform the active short-circuit action.

[0114] In one possible implementation, it further comprises:

[0115] After controlling the boost circuit 201 to perform the gate turn-off action and controlling the inverter 202 to perform the active short-circuit action, acquiring target data; the target data includes at least one of the running state of the boost circuit 201, the power supply state of the power supply unit connected to the input end of the boost circuit 201 and the running state of the load connected to the output end of the inverter 202;

[0116] When it is determined, based on the target data, that the boost circuit 201 meets the fault clearing condition, a fault clearing request signal is output to the latch circuit 205, and the fault clearing request signal is used to trigger the latch circuit 205 to clear the overvoltage fault of the boost circuit 201.

[0117] In an implementation, determining, based on the target data, whether the boost circuit 201 meets the fault clearing condition comprises:

[0118] Determining, based on the target data, whether the boost circuit 201 meets a fault recovery condition;

[0119] Determining, based on a determination result of whether the boost circuit 201 meets the fault recovery condition, whether the boost circuit 201 meets the fault clearing condition.

[0120] In an implementation, determining, based on the determination result of whether the boost circuit 201 meets the fault recovery condition, whether the boost circuit 201 meets the fault clearing condition comprises:

[0121] When the boost circuit 201 meets the fault recovery condition, a current fault clearing number of the boost circuit 201 is obtained, and based on the current fault clearing number of the boost circuit 201, it is determined whether the boost circuit 201 meets the fault clearing condition;

[0122] When the boost circuit 201 does not meet the fault recovery condition, it is determined that the boost circuit 201 does not meet the fault clearing condition.

[0123] In an implementation, determining, based on the current fault clearing number of the boost circuit 201, whether the boost circuit 201 meets the fault clearing condition comprises:

[0124] When the current fault clearing number of the boost circuit 201 is less than a preset fault clearing number limit, it is determined that the boost circuit 201 meets the fault clearing condition.

[0125] When the current fault clearing number of the boost circuit 201 is greater than or equal to the preset fault clearing number limit, it is determined that the boost circuit 201 does not meet the fault clearing condition.

[0126] The power conversion control method provided by the embodiment belongs to the same application concept as the power conversion control system provided by the above-mentioned embodiments of the present application. The controller 204 in the power conversion control system can execute the power conversion control method provided by any of the above-mentioned embodiments of the present application, and has a function module corresponding to the execution of the power conversion control method. The technical details not described in detail in the embodiment can refer to the specific processing content of the power conversion control system provided by the above-mentioned embodiments of the present application, which will not be described here.

[0127] Exemplary vehicle

[0128] In one example embodiment of the present application, a vehicle is also provided, which includes the power conversion control system according to any of the above-mentioned embodiments.

[0129] Exemplary computer program product and storage medium

[0130] In addition to the above-mentioned method and device, the power conversion control method provided by the embodiments of the present application can also be a computer program product, which includes computer program instructions that make the processor execute the steps of the power conversion control method according to various embodiments of the present application described in the above-mentioned “example method” part of the present application when the processor is running.

[0131] The computer program product can be written in any combination of one or more programming languages to perform the operations of the embodiments of the present application, including object-oriented programming languages such as Java, C++, and conventional procedural programming languages such as “C” language or similar programming languages.

[0132] In addition, the embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program makes the processor execute the steps of the power conversion control method according to various embodiments of the present application described in the above-mentioned “example method” part of the present application.

[0133] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, storage, databases, or other media in this specification shall include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), or external cache memory. As an illustration but not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0134] Any combination of the technical features of the above embodiments can be made, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present specification.

[0135] The above embodiments only express several embodiments of the present specification, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the solutions provided by the embodiments of the present specification. It should be noted that for ordinary skilled in the art, without departing from the concept of the present specification, a number of modifications and improvements can be made, which are within the scope of the present specification. Therefore, the scope of protection of the present specification should be subject to the appended claims.

Claims

1. An electric energy conversion control system, characterized in that: The invention comprises a boost circuit, an inverter, a fault detection circuit and a controller, wherein the boost circuit is connected to the inverter, the fault detection circuit is connected to the boost circuit, and the controller is connected to the boost circuit, the inverter and the fault detection circuit respectively; The fault detection circuit is used to perform overvoltage fault detection on the boost circuit; The controller is used to control the boost circuit to perform a shutdown action and control the inverter to perform an active short-circuit action when the output signal of the fault detection circuit indicates that the boost circuit has an overvoltage fault.

2. The electric energy conversion control system according to claim 1, characterized in that: The fault detection circuit is also connected to the boost circuit and the inverter; The output signal of the fault detection circuit is used to trigger the boost circuit to perform a shutdown action when an overvoltage fault occurs in the boost circuit, and to trigger the inverter to perform an active short-circuit action.

3. The electric energy conversion control system according to claim 2, characterized in that: It also includes a latch circuit, wherein the latch circuit is connected to the fault detection circuit, the boost circuit and the inverter respectively; The output signal of the fault detection circuit is used to trigger the latch circuit to perform fault latching when an overvoltage fault occurs in the boost circuit; The latch circuit is used to control the boost circuit to maintain a shutdown state and control the inverter to maintain an active short-circuit state in a fault latch state.

4. The electric energy conversion control system according to claim 3, characterized in that: The controller is also connected to the latch circuit; The controller is further configured to, after controlling the boost circuit to perform a shutdown action and controlling the inverter to perform an active short-circuit action, obtain target data, and, upon determining based on the target data that the boost circuit meets a fault-clearing condition, output a fault-clearing request signal to the latch circuit; the target data includes at least one of an operating state of the boost circuit, a power supply state of a power supply unit connected to an input terminal of the boost circuit, and an operating state of a load connected to an output terminal of the inverter; The fault clearing request signal is used to trigger the latch circuit to clear the overvoltage fault of the boost circuit.

5. The electric energy conversion control system according to claim 4, characterized in that: The controller is specifically used for: It is determined whether the boosting circuit satisfies a fault recovery condition based on the target data, and it is determined whether the boosting circuit satisfies the fault clearing condition based on a result of the determination of whether the boosting circuit satisfies the fault recovery condition.

6. The electric energy conversion control system according to claim 5, characterized in that: The controller is specifically used for: When the boost circuit meets the fault recovery condition, obtaining a current fault clearing count of the boost circuit, and determining whether the boost circuit meets the fault clearing condition based on the current fault clearing count of the boost circuit; When the boost circuit does not meet the fault recovery condition, it is determined that the boost circuit does not meet the fault clearing condition.

7. The electric energy conversion control system according to claim 6, characterized in that: The controller is specifically used for: When the current fault clearing times of the boost circuit are less than a preset fault clearing times limit, determining that the boost circuit meets the fault clearing condition; When the current fault clearing times of the boost circuit is greater than or equal to the preset fault clearing times limit, it is determined that the boost circuit does not meet the fault clearing condition.

8. A method for controlling electric energy conversion, characterized in that: Applied to the electric energy conversion control system according to any one of claims 1 to 7, the method comprises: obtaining an output signal of the fault detection circuit, wherein the fault detection circuit is used to perform overvoltage fault detection on the boost circuit; When the output signal of the fault detection circuit indicates that an overvoltage fault exists in the boost circuit, the boost circuit is controlled to perform a shutdown action, and the inverter is controlled to perform an active short-circuit action.

9. The electric energy conversion control method according to claim 8, characterized in that: Also includes: After controlling the boost circuit to perform a shutdown action and controlling the inverter to perform an active short-circuit action, acquiring target data; the target data includes at least one of an operating state of the boost circuit, a power supply state of a power supply unit connected to an input end of the boost circuit, and an operating state of a load connected to an output end of the inverter; When it is determined based on the target data that the boost circuit meets a fault clearing condition, a fault clearing request signal is output to the latch circuit, wherein the fault clearing request signal is used to trigger the latch circuit to clear the overvoltage fault of the boost circuit.

10. A vehicle, characterized in that: The vehicle includes the electric energy conversion control system according to any one of claims 1 to 7.

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