Vehicle-mounted power conversion device, method, and vehicle-mounted inverter

Abstract

The present invention relates to the technical field of vehicle-mounted inverters, and discloses a vehicle-mounted power conversion device, method, and vehicle-mounted inverter. The device includes a switch driving module configured to be in a target conductive state and control the switch control module to be conductive when receiving a first level signal sent by an adjustment signal sending module; an energy storage module configured to be in an energy storage state when the switch control module is conductive; the switch driving module is further configured to be in a target non-conductive state and control the switch control module to be disconnected when receiving a second level signal sent by the adjustment signal sending module; and a current rectifier module configured to rectify the superimposed current formed by the energy storage module and a power input device when the switch control module is disconnected, and transmit the rectified current to a target load. In this way, through a transformer-free and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted inverters, and in particular to a vehicle-mounted power conversion device and method, and a vehicle-mounted inverter. Background Art

[0002] As the variety and number of electronic devices within automobiles continue to increase, users are increasingly demanding the adaptability of onboard inverters, the core equipment for automotive power conversion. Existing onboard inverters typically use a transformer-isolated structure to meet the stable power support needs within the vehicle. However, practice has shown that isolated onboard inverters can experience energy loss during the power conversion process, resulting in low conversion efficiency. This not only affects the device's endurance, but also increases energy consumption and environmental pollution. Traditional inverters have limitations in terms of efficiency and adaptability. Therefore, it is particularly important to propose an onboard power conversion technology solution that can improve energy conversion efficiency. Summary of the Invention

[0003] The present invention provides an on-vehicle power conversion device, method and on-vehicle inverter. By adopting a transformer-free and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device.

[0004] In order to solve the above technical problems, the first aspect of the present invention discloses an on-vehicle power conversion device, which includes a current rectifier circuit, which includes a switch driving module 101, a switch control module 102, a current rectifier module 103 and an energy storage module 104, wherein:

[0005] The receiving end of the switch driving module 101 is used to be electrically connected to the sending end of the adjustment signal sending module 105. The driving end of the switch driving module 101 is electrically connected to the controlled end of the switch control module 102. The control end of the switch control module 102 and the output end of the energy storage module 104 are both electrically connected to the input end of the current rectifier module 103. The input end of the energy storage module 104 is used to be electrically connected to the voltage end of a preset power input device 106. The output end of the current rectifier module 103 is used to be electrically connected to the power end of the target load 107.

[0006] The switch driving module 101 is configured to enter a target on-state and control the switch control module 102 to be on when receiving a first level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105;

[0007] The energy storage module 104 is configured to be in an energy storage state when the switch control module 102 is turned on;

[0008] The switch driving module 101 is further configured to enter a target non-conducting state and release a target charge accumulated by the switch control module 102 upon receiving a second level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, so as to turn off the switch control module 102;

[0009] The current rectification module 103 is used to rectify the superimposed current formed by the back electromotive force generated by the energy storage module 104 based on the pre-stored energy and the output voltage of the power input device 106 when the switch control module 102 is disconnected, obtain the rectified current, and transmit the rectified current to the target load 107.

[0010] As an optional implementation manner, in the first aspect of the present invention, the first level signal is a high level signal, and the second level signal is a low level signal;

[0011] The switch driving module 101 includes a first diode D3 and a PNP transistor Q10, wherein:

[0012] The anode of the first diode D3 and the base of the PNP transistor Q10 are both electrically connected to the sending end of the adjustment signal sending module 105, the cathode of the first diode D3 and the emitter of the PNP transistor Q10 are both electrically connected to the controlled end of the switch control module 102, and the collector of the PNP transistor Q10 is grounded;

[0013] The first diode D3 is configured to be in a conducting state when receiving the high level signal;

[0014] The PNP transistor Q10 is configured to be in an off state when the first diode D3 receives the high level signal, so as to control the switch control module 102 to be turned on;

[0015] The first diode D3 is further configured to be in a non-conducting state when receiving the low-level signal;

[0016] The PNP transistor Q10 is further configured to be in a conducting state when the first diode D3 receives the low-level signal, and to release the target charge accumulated by the switch control module 102 to disconnect the switch control module 102 .

[0017] As an optional implementation, in the first aspect of the present invention, the switch control module 102 includes a first MOS transistor Q9, the energy storage module 104 includes an energy storage inductor L1, and the current rectification module 103 includes a second diode D8 and a second MOS transistor Q4, wherein:

[0018] The gate of the first MOS transistor Q9 is electrically connected to the cathode of the first diode D3 and the emitter of the PNP transistor Q10. The source of the first MOS transistor Q9 is grounded. The drain of the first MOS transistor Q9 is electrically connected to the first end of the energy storage inductor L1, the drain of the second MOS transistor Q4, and the anode of the second diode D8. The second end of the energy storage inductor L1 is electrically connected to the voltage terminal of the power input device 106. The cathode of the second diode D8 and the source of the second MOS transistor Q4 are both electrically connected to the power terminal of the target load 107.

[0019] The second diode D8 is specifically configured to be in a non-conducting state when the current value of the superimposed current is less than or equal to a preset current threshold; and to be in a conducting state when the current value of the superimposed current is greater than the current threshold.

[0020] As an optional embodiment, in the first aspect of the present invention, the vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein:

[0021] The input end of the electrical signal identification module is electrically connected to the output end of the current rectification module 103, the output end of the electrical signal identification module is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal identification module is electrically connected to the signal receiving end of the amplification module, the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module, and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module 102;

[0022] The electrical signal recognition module is configured to generate a voltage to be identified based on an abnormal electrical signal received during the process of the current rectification module 103 transmitting the rectified current to the target load 107, and transmit the voltage to be identified to the amplification module;

[0023] The amplification module is used to perform a voltage amplification operation on the voltage to be identified to obtain an amplified voltage, and transmit the amplified voltage to the electrical signal identification module;

[0024] The electrical signal recognition module is used to determine whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold. If so, it controls the switch control module 102 to be disconnected, and controls the current rectification module 103 to be disconnected, so that the current rectification module 103 is in a no-current output state.

[0025] As an optional embodiment, in the first aspect of the present invention, the electrical signal identification module includes an electrical signal transformer T1, the amplification module includes an NPN transistor Q6, and the leakage protection module includes a leakage protection chip U6, wherein:

[0026] The input end of the electrical signal transformer T1 is electrically connected to the output end of the current rectifier module 103, the output end of the electrical signal transformer T1 is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal transformer T1 is electrically connected to the base of the NPN transistor Q6, and the ground end of the electrical signal transformer T1 is used to be grounded;

[0027] The emitter of the NPN transistor Q6 is grounded, the collector of the NPN transistor Q6 is electrically connected to the signal receiving end of the leakage protection chip U6 , and the control end of the leakage protection chip U6 is electrically connected to the controlled end of the switch control module 102 .

[0028] As an optional embodiment, in the first aspect of the present invention, the vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, the overcurrent trigger protection circuit including a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein:

[0029] The detection end of the voltage detection module is electrically connected to the output end of the current rectification module 103, the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer T1, the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device;

[0030] The voltage detection module is configured to, during the process of the current rectification module 103 transmitting the rectified current to the target load 107, perform an electric signal oscillation operation when a voltage value of a target voltage formed based on the rectified current is greater than a preset second voltage threshold, so as to increase the electric field energy stored in the overcurrent feedback module;

[0031] The protection switch control module is used to be in a conducting state when the electric field energy stored in the overcurrent feedback module rises to a preset electric field energy threshold, so as to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

[0032] As an optional embodiment, in the first aspect of the present invention, the voltage detection module includes a detection resistor R12, a third diode D9, a target capacitor C14, and a target inductor T2; the overcurrent feedback module includes a polarity capacitor U9; and the protection switch control module includes a relay RLY1, wherein:

[0033] A first end of the detection resistor R12 is electrically connected to the output end of the current rectifier module 103, and a second end of the detection resistor R12 is electrically connected to the input end of the electrical signal transformer T1;

[0034] One end of the target capacitor C14 is electrically connected to the first end of the detection resistor R12, and the other end of the target capacitor C14 is electrically connected to the second end of the detection resistor R12;

[0035] The cathode of the third diode D9 is electrically connected to the first end of the detection resistor R12 and the first end of the target inductor T2, and the anode of the third diode is electrically connected to the second end of the detection resistor R12;

[0036] The positive electrode of the polar capacitor U9 is electrically connected to the second end of the target inductor T2 and the controlled end of the relay RLY1, the negative electrode of the polar capacitor U9 is used for grounding, and the control end of the relay RLY1 is used for electrically connecting to the overcurrent warning device.

[0037] A second aspect of the present invention discloses a vehicle-mounted power conversion method, which is applied to a vehicle-mounted power conversion device. The vehicle-mounted power conversion device includes a current rectifier circuit, which includes a switch drive module 101, a switch control module 102, a current rectifier module 103, and an energy storage module 104, wherein:

[0038] The receiving end of the switch driving module 101 is used to be electrically connected to the sending end of the adjustment signal sending module 105. The driving end of the switch driving module 101 is electrically connected to the controlled end of the switch control module 102. The control end of the switch control module 102 and the output end of the energy storage module 104 are both electrically connected to the input end of the current rectifier module 103. The input end of the energy storage module 104 is used to be electrically connected to the voltage end of a preset power input device 106. The output end of the current rectifier module 103 is used to be electrically connected to the power end of the target load 107.

[0039] The method comprises:

[0040] When the switch driving module 101 receives the first level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, it is in the target conduction state and controls the switch control module 102 to be turned on;

[0041] When the switch control module 102 is turned on, the energy storage module 104 is in an energy storage state;

[0042] When the switch driving module 101 receives the second level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, it enters the target non-conducting state and releases the target charge accumulated by the switch control module 102, so that the switch control module 102 is turned off;

[0043] When the switch control module 102 is disconnected, the current rectification module 103 performs a rectification operation on the superimposed current formed by the back electromotive force generated by the energy storage module 104 based on the pre-stored energy and the output voltage of the power input device 106 to obtain a rectified current, and transmits the rectified current to the target load 107.

[0044] As an optional embodiment, in the second aspect of the present invention, the vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein:

[0045] The input end of the electrical signal identification module is electrically connected to the output end of the current rectification module 103, the output end of the electrical signal identification module is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal identification module is electrically connected to the signal receiving end of the amplification module, the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module, and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module 102;

[0046] The method further comprises:

[0047] During the process of the current rectification module 103 transmitting the rectified current to the target load 107, when the electrical signal recognition module receives an abnormal electrical signal, it generates a voltage to be recognized according to the abnormal electrical signal and transmits the voltage to be recognized to the amplification module;

[0048] The amplifying module performs a voltage amplification operation on the voltage to be identified to obtain an amplified voltage, and transmits the amplified voltage to the electrical signal identification module;

[0049] The electrical signal recognition module determines whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold. If so, it controls the switch control module 102 to be disconnected, and controls the current rectification module 103 to be disconnected, so that the current rectification module 103 is in a no-current output state.

[0050] As an optional embodiment, in the second aspect of the present invention, the vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, the overcurrent trigger protection circuit including a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein:

[0051] The detection end of the voltage detection module is electrically connected to the output end of the current rectification module 103, the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer T1, the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device;

[0052] The method further comprises:

[0053] During the process of the current rectification module 103 transmitting the rectified current to the target load 107, when the voltage value of the target voltage formed based on the rectified current is greater than a preset second voltage threshold, the voltage detection module performs an electric signal oscillation operation to increase the electric field energy stored in the overcurrent feedback module;

[0054] When the electric field energy stored in the overcurrent feedback module increases to a preset electric field energy threshold, the protection switch control module is in an on state to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

[0055] A third aspect of the present invention discloses an on-vehicle inverter, which includes a housing and a circuit board. The circuit board includes the on-vehicle power conversion device as described in any one of the first aspects of the present invention.

[0056] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0057] In an embodiment of the present invention, the device includes a switch driving module configured to be in a target conduction state and control the switch control module to be conducted when receiving a first level signal sent by the adjustment signal sending module; an energy storage module configured to be in an energy storage state when the switch control module is conducted; the switch driving module is further configured to be in a target non-conduction state and control the switch control module to be disconnected when receiving a second level signal sent by the adjustment signal sending module; and a current rectification module configured to rectify the superimposed current formed by the energy storage module and the power input device when the switch control module is disconnected, and transmit the rectified current to the target load. In this way, through the transformerless and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0059] Figure 1 This is a flow chart of a vehicle-mounted power conversion device disclosed in an embodiment of the present invention;

[0060] Figure 2 This is a flow chart of another vehicle-mounted power conversion device disclosed in an embodiment of the present invention;

[0061] Figure 3 This is a structural diagram of a vehicle-mounted power conversion method disclosed in an embodiment of the present invention;

[0062] Figure 4 It is a structural schematic diagram of a vehicle-mounted inverter disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0064] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or mutual communication; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0065] In addition, the terms "first," "second," and so on, in the description and claims of the present invention and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or end.

[0066] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0067] The present invention discloses an on-vehicle power conversion device, method and on-vehicle inverter. By adopting a transformer-free and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device.

[0068] Example 1

[0069] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle-mounted power conversion device disclosed in an embodiment of the present invention. The device can be applied to cars, off-road vehicles, trucks, trucks, battery vehicles, etc. Figure 1 As shown, the vehicle-mounted power conversion device includes a current rectification circuit, which includes a switch driving module 101, a switch control module 102, a current rectification module 103 and an energy storage module 104, wherein:

[0070] The receiving end of the switch driving module 101 is used to electrically connect to the transmitting end of the adjustment signal sending module 105. The driving end of the switch driving module 101 is electrically connected to the controlled end of the switch control module 102. The control end of the switch control module 102 and the output end of the energy storage module 104 are both electrically connected to the input end of the current rectifier module 103. The input end of the energy storage module 104 is used to electrically connect to the voltage end of a preset power input device 106. The output end of the current rectifier module 103 is used to electrically connect to the power end of the target load 107.

[0071] The switch driving module 101 is configured to enter a target on-state and control the switch control module 102 to be on when receiving a first level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105;

[0072] The energy storage module 104 is configured to be in an energy storage state when the switch control module 102 is turned on;

[0073] The switch driving module 101 is further configured to enter a target non-conducting state upon receiving a second level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, and release a target charge accumulated by the switch control module 102, thereby turning off the switch control module 102;

[0074] The current rectification module 103 is used to rectify the superimposed current formed by the back electromotive force generated by the energy storage module 104 based on the pre-stored energy and the output voltage of the power input device 106 when the switch control module 102 is disconnected, obtain the rectified current, and transmit the rectified current to the target load 107.

[0075] In the embodiment of the present invention, the first level signal may be a high level signal, and the second level signal may be a low level signal. The specific level signal type may be set based on a specific circuit construction.

[0076] Further, such as Figure 2 As shown, Figure 2 FIG. 1 is a structural diagram of another vehicle-mounted power conversion device disclosed in an embodiment of the present invention. The switch driving module 101 includes a first diode D3 and a PNP transistor Q10, wherein:

[0077] The anode of the first diode D3 and the base of the PNP transistor Q10 are both electrically connected to the sending end of the adjustment signal sending module 105, the cathode of the first diode D3 and the emitter of the PNP transistor Q10 are both electrically connected to the controlled end of the switch control module 102, and the collector of the PNP transistor Q10 is grounded;

[0078] The first diode D3 is configured to be in a conducting state when receiving a high level signal;

[0079] The PNP transistor Q10 is configured to be in an off state when the first diode D3 receives a high level signal, so as to control the switch control module 102 to be turned on;

[0080] The first diode D3 is further configured to be in a non-conducting state when receiving a low-level signal;

[0081] The PNP transistor Q10 is further configured to be in a conducting state when the first diode D3 receives a low-level signal, and to release the target charge accumulated by the switch control module 102 to disconnect the switch control module 102 .

[0082] Optionally, the aforementioned first diode D3 and the PNP transistor Q10 may be replaced by other devices or components to achieve the above-mentioned on / off control of the switch control module 102 .

[0083] Further, if Figure 2 As shown, the switch control module 102 includes a first MOS transistor Q9, the energy storage module 104 includes an energy storage inductor L1, and the current rectification module 103 includes a second diode D8 and a second MOS transistor Q4, wherein:

[0084] The gate of the first MOS transistor Q9 is electrically connected to the cathode of the first diode D3 and the emitter of the PNP transistor Q10. The source of the first MOS transistor Q9 is grounded. The drain of the first MOS transistor Q9 is electrically connected to the first end of the energy storage inductor L1, the drain of the second MOS transistor Q4, and the anode of the second diode D8. The second end of the energy storage inductor L1 is electrically connected to the voltage terminal of the power input device 106. The cathode of the second diode D8 and the source of the second MOS transistor Q4 are both electrically connected to the power terminal of the target load 107.

[0085] The second diode D8 is specifically configured to be in a non-conducting state when the current value of the superimposed current is less than or equal to a preset current threshold; and to be in a conducting state when the current value of the superimposed current is greater than the current threshold.

[0086] In this optional embodiment, it should be noted that when a high level passes through the first diode D3, it is actually applied to the gate of the first MOS transistor Q9, and the PNP transistor Q10 is disconnected (therefore, the switch driving module 101 is in the target conduction state as a whole). At this time, the first MOS transistor Q9 is quickly turned on, and the energy storage inductor L1 stores input energy from the power input device; when a low level passes through the first diode D3, no current flows through the first diode D3, that is, it is in a non-conducting state, and the PNP transistor Q10 is turned on (therefore, the switch driving module 101 is in the target non-conducting state as a whole). The purpose is to discharge the gate charge in the first MOS transistor Q9 as quickly as possible and quickly disconnect the first MOS transistor Q9. The MOS transistor Q9, that is, the first diode D3, can be considered a fast switching transistor, which is used to accelerate the conduction of the first MOS transistor Q9, thereby allowing the energy storage inductor L1 to quickly enter the energy storage state. The PNP transistor Q10 can be considered a fast PNP transistor, which is used to accelerate the disconnection of the first MOS transistor Q9, thereby allowing the superimposed current formed by the back electromotive force generated by the energy storage inductor L1 and the output voltage of the power input device 106 to quickly flow through the current rectification module 103. In this way, by controlling the rapid on and off of the first MOS transistor Q9, the generation of ringing signals can be minimized, the loss of the first MOS transistor Q9 can be reduced, and the conversion efficiency and reliability of the overall current rectification circuit can be improved.

[0087] It should also be noted that the second MOS tube Q4 is connected in parallel with the second diode D8. When the superimposed current is small, the superimposed current flows through the second MOS tube Q4, and no current flows through the second diode D8. When the superimposed current is large, the voltage drop through the second MOS tube Q4 is larger than the voltage drop of the second diode D8. At this time, the second diode D8 acts as a clamp, and the superimposed current flows to the second MOS tube Q4 and the second diode D8. In this way, it can adapt to scenarios with large power changes. In addition, the on-board power conversion device also has the following advantages: 1) SPWM control and pure sine wave output: By adopting SPWM control technology, a pure sine wave is output, so that all electrical equipment that uses mains power can be used, thereby enhancing the versatility of the equipment; 2) Software soft start: Soft start is achieved through software, which avoids the impact current at startup and effectively extends the service life of the equipment; 3) PID closed-loop control: The introduction of PID closed-loop control technology significantly improves the anti-interference ability of the inverter; 4) Real-time detection and adjustment: The output voltage is detected in real time, and the pulse width can be automatically adjusted according to the load size (by Figure 2 Chip U2 in the inverter adjusts the pulse width of RA4 and RA5), making the inverter more adaptable; 5) Multiple protection and safety instructions: with input reverse connection protection ( Figure 2 6) MCU control: The use of MCU for control makes the equipment more flexible and adaptable; 7) GaN power devices: GaN is used as the power device, and its good thermal stability and low loss characteristics are utilized to improve the efficiency of the inverter; 8) Capacitor bootstrap circuit: A capacitor bootstrap circuit (including a current driver chip U3 with a bootstrap function and a bootstrap capacitor C3) is designed to ensure that the power tube switch is always in good working condition and almost no harmonics are generated; 9) Load detection and sleep mode: A load detection function is added, and the device automatically enters sleep mode when no load is applied, reducing power consumption to zero; 10) Distributed design: Multiple MCUs are used for control to improve system reliability.

[0088] Optionally, the aforementioned first MOS transistor Q9, energy storage inductor L1, second diode D8 and second MOS transistor Q4 can be replaced by other devices or components to achieve the above-mentioned energy storage process and superimposed current transmission process, wherein the aforementioned MOS transistor can adopt a hot standby mode to improve the reliability of the device.

[0089] Furthermore, if Figure 2As shown, the protection resistor R35 can be connected in series with the protection capacitor C18 and connected together in parallel to the first MOS transistor Q9 to eliminate the spike of the first MOS transistor Q9 and protect the first MOS transistor Q9. In addition, the current rectification module 103 can further include a voltage regulator D7 and a fourth diode D4, wherein the positive electrode of the voltage regulator D7 is electrically connected to the source of the second MOS transistor Q4, the negative electrode of the voltage regulator D7 is electrically connected to the positive electrode of the fourth diode D4 and the gate of the second MOS transistor Q4, and the negative electrode of the fourth diode D4 is electrically connected to the gate of the second MOS transistor Q4. In this way, the fourth diode D4 can increase the discharge speed of the gate of the second MOS transistor Q4, and the voltage regulator D7 can protect the gate of the second MOS transistor Q4.

[0090] It can be seen that the embodiment of the present invention can control the conduction and disconnection of the switch control module based on the high and low level signals received by the switch driving module, thereby realizing the energy storage and voltage boosting process of the current rectifier circuit. In this way, through the transformerless and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device. At the same time, it also significantly reduces the volume and weight required for the device, and improves the convenience of using the vehicle inverter.

[0091] In an optional embodiment, the vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein:

[0092] The input end of the electrical signal identification module is electrically connected to the output end of the current rectification module 103, the output end of the electrical signal identification module is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal identification module is electrically connected to the signal receiving end of the amplification module, the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module, and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module 102;

[0093] The electrical signal recognition module is configured to generate a voltage to be identified based on an abnormal electrical signal received during the process of the current rectification module 103 transmitting the rectified current to the target load 107, and transmit the voltage to be identified to the amplification module;

[0094] An amplification module, configured to amplify the voltage to be identified to obtain an amplified voltage, and transmit the amplified voltage to the electrical signal identification module;

[0095] The electrical signal recognition module is used to determine whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold. If so, the switch control module 102 is controlled to be disconnected, and the current rectifier module 103 is controlled to be disconnected, so that the current rectifier module 103 is in a no-current output state.

[0096] In this optional embodiment, the abnormal electrical signal may optionally include one or more of an electric shock signal, a power-on pulse signal, an inductive load signal, and the like.

[0097] Furthermore, the electrical signal identification module includes an electrical signal transformer T1, the amplification module includes an NPN transistor Q6, and the leakage protection module includes a leakage protection chip U6, wherein:

[0098] The input end of the electrical signal transformer T1 is electrically connected to the output end of the current rectifier module 103, the output end of the electrical signal transformer T1 is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal transformer T1 is electrically connected to the base of the NPN transistor Q6, and the ground end of the electrical signal transformer T1 is used for grounding;

[0099] The emitter of the NPN transistor Q6 is grounded, the collector of the NPN transistor Q6 is electrically connected to the signal receiving end of the leakage protection chip U6 , and the control end of the leakage protection chip U6 is electrically connected to the controlled end of the switch control module 102 .

[0100] It should be noted that during normal use of the device, the output voltage of the electrical signal transformer T1 (i.e., the voltage to be identified) is 0V, which will not trigger the leakage protection chip U6 to perform leakage protection action, that is, it will not control the switch control module 102 to be disconnected; when the electrical signal transformer T1 receives an abnormal electrical signal, it will output a voltage, which will be amplified by the NPN transistor Q6 and transmitted to the leakage protection chip U6. When the voltage value of the amplified voltage is greater than or equal to the preset first voltage threshold, the leakage protection chip U6 outputs a low level, and then pulls down the gate level of the first MOS transistor Q9 in the switch control module 102, and the first MOS transistor Q9 is disconnected, thereby causing the current rectifier module 103 to have no output, and the switch control module 102 will no longer be controlled to be disconnected until the abnormal electrical signal is released.

[0101] Optionally, the electrical signal transformer T1, the NPN transistor Q6 and the leakage protection chip U6 can be replaced with other devices or components to implement the above-mentioned abnormal electrical signal detection process.

[0102] It can be seen that this optional embodiment can construct a leakage detection circuit through an electrical signal transformer, an NPN transistor and a leakage protection chip. In this way, once an abnormal electrical signal is captured, it is quickly converted into a voltage signal to be identified, and the voltage is amplified through the amplification module to ensure accurate identification and transmission of the signal, thereby improving the signal detection sensitivity and the response rate of the chip, thereby improving the accuracy of cutting off the power output, effectively isolating the fault source, thereby improving the operating stability of the entire vehicle-mounted power conversion device, and effectively reducing personal safety accidents caused by leakage.

[0103] In another optional embodiment, the vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, which includes a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein:

[0104] The detection end of the voltage detection module is electrically connected to the output end of the current rectification module 103, the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer T1, the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device;

[0105] a voltage detection module configured to, during the process of the current rectification module 103 transmitting the rectified current to the target load 107, perform an electric signal oscillation operation when a voltage value of a target voltage formed based on the rectified current is greater than a preset second voltage threshold, so as to increase the electric field energy stored in the overcurrent feedback module;

[0106] The protection switch control module is used to be in a conducting state when the electric field energy stored in the overcurrent feedback module rises to a preset electric field energy threshold, so as to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

[0107] In this optional embodiment, the overcurrent reminder device may optionally include a buzzer, a light emitting device, and the like.

[0108] Furthermore, the voltage detection module includes a detection resistor R12, a third diode D9, a target capacitor C14, and a target inductor T2; the overcurrent feedback module includes a polarity capacitor U9; and the protection switch control module includes a relay RLY1, wherein:

[0109] A first end of the detection resistor R12 is electrically connected to the output end of the current rectifier module 103 , and a second end of the detection resistor R12 is electrically connected to the input end of the electrical signal transformer T1 ;

[0110] One end of the target capacitor C14 is electrically connected to the first end of the detection resistor R12, and the other end of the target capacitor C14 is electrically connected to the second end of the detection resistor R12;

[0111] The cathode of the third diode D9 is electrically connected to the first end of the detection resistor R12 and the first end of the target inductor T2, and the anode of the third diode is electrically connected to the second end of the detection resistor R12;

[0112] The positive electrode of the polar capacitor U9 is electrically connected to the second end of the target inductor T2 and the controlled end of the relay RLY1, the negative electrode of the polar capacitor U9 is used for grounding, and the control end of the relay RLY1 is used for electrically connecting to the overcurrent warning device.

[0113] It should be noted that the target voltage formed based on the rectified current can be understood as the voltage formed across the detection resistor R12 based on the rectified current. That is, when the voltage across the detection resistor R12 is small, it is insufficient to cause the RLC circuit where the detection resistor R12 is located (wherein the third diode D9 acts as a clamp) to cause an electrical signal oscillation, and then the voltage across the polarity capacitor U9 is 0V, the relay RLY1 is in a normally closed state (that is, pins 3 / 5 of the relay RLY1 are turned on, and pin 2 is floating), and the buzzer, light-emitting device, etc. do not operate; when the voltage across the detection resistor R12 is large, the RLC circuit where the detection resistor R12 is located to cause an electrical signal oscillation, and at this time the voltage across the polarity capacitor U9 increases. When the preset second voltage threshold is reached, the relay RLY1 is activated, pins 3 / 5 are disconnected, and pins 2 / 5 are turned on, so that the buzzer emits an alarm sound and the light-emitting device emits a light signal. Furthermore, by configuring the appropriate target inductance in the RLC circuit where the detection resistor R12 is located, the voltage across the detection resistor R12 can be lowered, which means that the sampling resistor can be very small, reducing energy loss.

[0114] It can be seen that this optional embodiment can achieve effective monitoring of the rectified current through the coordinated work of the voltage detection module, the overcurrent feedback module and the protection switch control module. In this way, the response rate of the overcurrent triggering protection circuit and the accurate identification of overcurrent conditions are improved, thereby effectively reducing the potential damage to the circuit or load caused by excessive current, thereby improving the overall performance and safety of the on-board power supply device; at the same time, through the RLC circuit construction, the protection mechanism can be triggered at a lower voltage, further reducing the resistance of the sampling resistor, thereby reducing the power consumption of the device.

[0115] Example 2

[0116] See also Figure 3 , Figure 3 1 is a flow chart of a vehicle-mounted power conversion method disclosed in an embodiment of the present invention, wherein the method is applied to a vehicle-mounted power conversion device, the device including a current rectifier circuit, the current rectifier circuit including a switch driving module 101, a switch control module 102, a current rectifier module 103 and an energy storage module 104, wherein:

[0117] The receiving end of the switch driving module 101 is used to electrically connect to the sending end of the adjustment signal sending module 105, the driving end of the switch driving module 101 is electrically connected to the controlled end of the switch control module 102, the control end of the switch control module 102 and the output end of the energy storage module 104 are both electrically connected to the input end of the current rectifier module 103, the input end of the energy storage module 104 is used to electrically connect to the voltage end of the preset power input device 106, and the output end of the current rectifier module 103 is used to electrically connect to the power end of the target load 107; Figure 3As shown, the method may include the following steps:

[0118] 301. When the switch driving module 101 receives the first level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, it is in the target conduction state and controls the switch control module 102 to be turned on.

[0119] 302. When the switch control module 102 is turned on, the energy storage module 104 is in an energy storage state.

[0120] 303. When the switch driving module 101 receives the second level signal determined according to the output voltage of the power input device 106 and sent by the adjustment signal sending module 105, it is in the target non-conducting state and releases the target charge accumulated by the switch control module 102 to disconnect the switch control module 102.

[0121] 304. When the switch control module 102 is disconnected, the current rectification module 103 performs a rectification operation on the superimposed current formed by the back electromotive force generated by the energy storage module 104 based on the pre-stored energy and the output voltage of the power input device 106 to obtain a rectified current, and transmits the rectified current to the target load 107.

[0122] It can be seen that the implementation of the embodiment of the present invention can control the conduction and disconnection of the switch control module based on the high and low level signals received by the switch driving module, thereby realizing the energy storage and voltage boost process of the current rectifier circuit. In this way, through the transformerless and non-isolated structure, the conversion efficiency and adaptability of the device are improved, and the power consumption of the device is effectively reduced, thereby improving the reliability of the device. At the same time, it also significantly reduces the volume and weight required for the device, and improves the convenience of using the vehicle inverter.

[0123] In an optional embodiment, the vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein:

[0124] The input end of the electrical signal identification module is electrically connected to the output end of the current rectification module 103, the output end of the electrical signal identification module is used to electrically connect to the power supply end of the target load 107, the signal sending end of the electrical signal identification module is electrically connected to the signal receiving end of the amplification module, the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module, and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module 102;

[0125] The method also includes:

[0126] During the process of the current rectification module 103 transmitting the rectified current to the target load 107, when the electrical signal recognition module receives an abnormal electrical signal, it generates a voltage to be recognized according to the abnormal electrical signal and transmits the voltage to be recognized to the amplification module;

[0127] The amplification module performs a voltage amplification operation on the voltage to be identified to obtain an amplified voltage, and transmits the amplified voltage to the electrical signal identification module;

[0128] The electrical signal recognition module determines whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold. If so, the switch control module 102 is controlled to be disconnected, and the current rectifier module 103 is controlled to be disconnected, so that the current rectifier module 103 is in a no-current output state.

[0129] It can be seen that this optional embodiment can construct a leakage detection circuit through an electrical signal transformer, an NPN transistor and a leakage protection chip. In this way, once an abnormal electrical signal is captured, it is quickly converted into a voltage signal to be identified, and the voltage is amplified through the amplification module to ensure accurate identification and transmission of the signal, thereby improving the signal detection sensitivity and the response rate of the chip, thereby improving the accuracy of cutting off the power output, effectively isolating the fault source, thereby improving the operating stability of the entire vehicle-mounted power conversion device, and effectively reducing personal safety accidents caused by leakage.

[0130] In an optional embodiment, the vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, which includes a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein:

[0131] The detection end of the voltage detection module is electrically connected to the output end of the current rectification module 103, the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer T1, the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device;

[0132] The method also includes:

[0133] During the process of the current rectification module 103 transmitting the rectified current to the target load 107, when the voltage value of the target voltage formed based on the rectified current is greater than the preset second voltage threshold, the voltage detection module performs an electric signal oscillation operation to increase the electric field energy stored in the overcurrent feedback module;

[0134] When the electric field energy stored in the overcurrent feedback module increases to a preset electric field energy threshold, the protection switch control module is in an on state to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

[0135] It can be seen that this optional embodiment can achieve effective monitoring of the rectified current through the coordinated work of the voltage detection module, the overcurrent feedback module and the protection switch control module. In this way, the response rate of the overcurrent triggering protection circuit and the accurate identification of overcurrent conditions are improved, thereby effectively reducing the potential damage to the circuit or load caused by excessive current, thereby improving the overall performance and safety of the on-board power supply device; at the same time, through the RLC circuit construction, the protection mechanism can be triggered at a lower voltage, further reducing the resistance of the sampling resistor, thereby reducing the power consumption of the device.

[0136] Example 3

[0137] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a vehicle-mounted inverter disclosed in an embodiment of the present invention. The vehicle-mounted inverter includes a device housing and a circuit board. The circuit board includes any of the vehicle-mounted power conversion devices described in Example 1. The vehicle-mounted inverter can be used in cars, off-road vehicles, trucks, trucks, electric vehicles, and the like. It should be noted that for a detailed description of the vehicle-mounted power conversion device, please refer to the detailed description of the relevant content in Example 1 and will not be repeated in this embodiment.

[0138] It can be seen that implementation Figure 4 The described vehicle-mounted inverter can control the conduction and disconnection of the switch control module based on the high and low level signals received by the switch drive module, thereby realizing the energy storage and voltage boost process of the current rectifier circuit. In this way, through the transformerless and non-isolated structure, the conversion efficiency and adaptability of the vehicle-mounted inverter are improved, and the power consumption required by the vehicle-mounted inverter is effectively reduced, thereby improving the reliability of the vehicle-mounted inverter; at the same time, it also significantly reduces the volume and weight required by the vehicle-mounted inverter, improving the convenience of using the vehicle-mounted inverter.

[0139] The above is a detailed introduction to a vehicle-mounted power conversion device, method and vehicle-mounted inverter disclosed in an embodiment of the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. However, the above preferred embodiments are not intended to limit the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, based on the ideas of the present invention, there may be changes in the specific implementation methods and application scopes without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims.

Claims

1. A vehicle-mounted power conversion device, characterized in that: The vehicle-mounted power conversion device comprises a current rectification circuit, which comprises a switch driving module (101), a switch control module (102), a current rectification module (103) and an energy storage module (104), wherein: The receiving end of the switch driving module (101) is used to electrically connect to the sending end of the adjustment signal sending module (105); the driving end of the switch driving module (101) is electrically connected to the controlled end of the switch control module (102); the control end of the switch control module (102) and the output end of the energy storage module (104) are both electrically connected to the input end of the current rectifier module (103); the input end of the energy storage module (104) is used to electrically connect to the voltage end of a preset power input device (106); and the output end of the current rectifier module (103) is used to electrically connect to the power end of the target load (107); The switch driving module (101) is configured to be in a target conduction state and control the switch control module (102) to be turned on when receiving a first level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105); The energy storage module (104) is configured to be in an energy storage state when the switch control module (102) is turned on; The switch driving module (101) is further configured to enter a target non-conducting state and release the target charge accumulated by the switch control module (102) when receiving a second level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105), so as to disconnect the switch control module (102); The current rectifying module (103) is used for rectifying the superimposed current formed by the back electromotive force generated by the energy storage module (104) based on the pre-stored energy and the output voltage of the power input device (106) when the switch control module (102) is disconnected, to obtain a rectified current, and transmit the rectified current to the target load (107); Wherein, the first level signal is a high level signal, and the second level signal is a low level signal; The switch driving module (101) comprises a first diode (D3) and a PNP transistor (Q10), wherein: The anode of the first diode (D3) and the base of the PNP transistor (Q10) are both used to electrically connect to the sending end of the adjustment signal sending module (105), the cathode of the first diode (D3) and the emitter of the PNP transistor (Q10) are both electrically connected to the controlled end of the switch control module (102), and the collector of the PNP transistor (Q10) is used to be grounded; The first diode (D3) is configured to be in a conducting state when receiving the high-level signal; The PNP transistor (Q10) is configured to be in an off state when the first diode (D3) receives the high-level signal, so as to control the switch control module (102) to be turned on; The first diode (D3) is further configured to be in a non-conducting state when receiving the low-level signal; The PNP transistor (Q10) is further configured to be in a conducting state when the first diode (D3) receives the low-level signal, and to release the target charge accumulated by the switch control module (102), so as to disconnect the switch control module (102).

2. The vehicle-mounted power conversion device according to claim 1, characterized in that: The switch control module (102) includes a first MOS tube (Q9), the energy storage module (104) includes an energy storage inductor (L1), and the current rectification module (103) includes a second diode (D8) and a second MOS tube (Q4), wherein: The gate of the first MOS transistor (Q9) is electrically connected to the cathode of the first diode (D3) and the emitter of the PNP transistor (Q10); the source of the first MOS transistor (Q9) is used for grounding; the drain of the first MOS transistor (Q9) is electrically connected to the first end of the energy storage inductor (L1), the drain of the second MOS transistor (Q4) and the anode of the second diode (D8); the second end of the energy storage inductor (L1) is used for electrically connecting to the voltage end of the power input device (106); the cathode of the second diode (D8) and the source of the second MOS transistor (Q4) are both used for electrically connecting to the power end of the target load (107); The second diode (D8) is specifically configured to be in a non-conducting state when the current value of the superimposed current is less than or equal to a preset current threshold; and to be in a conducting state when the current value of the superimposed current is greater than the current threshold.

3. The vehicle-mounted power conversion device according to claim 1 or 2, characterized in that: The vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein: The input end of the electric signal identification module is electrically connected to the output end of the current rectification module (103); the output end of the electric signal identification module is used to electrically connect to the power supply end of the target load (107); the signal sending end of the electric signal identification module is electrically connected to the signal receiving end of the amplification module; the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module; and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module (102); The electrical signal recognition module is configured to generate a voltage to be identified based on an abnormal electrical signal when an abnormal electrical signal is received during the process of the current rectification module (103) transmitting the rectified current to the target load (107), and transmit the voltage to be identified to the amplification module; The amplification module is used to perform a voltage amplification operation on the voltage to be identified to obtain an amplified voltage, and transmit the amplified voltage to the electrical signal identification module; The electrical signal recognition module is used to determine whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold; if so, the switch control module (102) is controlled to be disconnected, and the current rectification module (103) is controlled to be disconnected, so that the current rectification module (103) is in a no-current output state.

4. The vehicle-mounted power conversion device according to claim 3, characterized in that: The electric signal identification module includes an electric signal mutual inductor (T1), the amplification module includes an NPN transistor (Q6), and the leakage protection module includes a leakage protection chip (U6), wherein: The input end of the electric signal mutual inductor (T1) is electrically connected to the output end of the current rectifier module (103), the output end of the electric signal mutual inductor (T1) is used to electrically connect to the power supply end of the target load (107), the signal sending end of the electric signal mutual inductor (T1) is electrically connected to the base of the NPN transistor (Q6), and the grounding end of the electric signal mutual inductor (T1) is used to be grounded; The emitter of the NPN transistor (Q6) is used for grounding, the collector of the NPN transistor (Q6) is electrically connected to the signal receiving end of the leakage protection chip (U6), and the control end of the leakage protection chip (U6) is electrically connected to the controlled end of the switch control module (102).

5. The vehicle-mounted power conversion device according to claim 4, characterized in that: The vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, which includes a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein: The detection end of the voltage detection module is electrically connected to the output end of the current rectification module (103), the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer (T1), the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device; The voltage detection module is configured to, during the process of the current rectification module (103) transmitting the rectified current to the target load (107), perform an electric signal oscillation operation when a voltage value of a target voltage formed based on the rectified current is greater than a preset second voltage threshold, so as to increase the electric field energy stored in the overcurrent feedback module; The protection switch control module is used to be in a conducting state when the electric field energy stored in the overcurrent feedback module rises to a preset electric field energy threshold, so as to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

6. The vehicle-mounted power conversion device according to claim 5, characterized in that: The voltage detection module includes a detection resistor (R12), a third diode (D9), a target capacitor (C14), and a target inductor (T2); the overcurrent feedback module includes a polarity capacitor (U9); and the protection switch control module includes a relay (RLY1), wherein: The first end of the detection resistor (R12) is electrically connected to the output end of the current rectifier module (103), and the second end of the detection resistor (R12) is electrically connected to the input end of the electrical signal transformer (T1); One end of the target capacitor (C14) is electrically connected to the first end of the detection resistor (R12), and the other end of the target capacitor (C14) is electrically connected to the second end of the detection resistor (R12); The cathode of the third diode (D9) is electrically connected to the first end of the detection resistor (R12) and the first end of the target inductor (T2), and the anode of the third diode is electrically connected to the second end of the detection resistor (R12); The positive electrode of the polar capacitor (U9) is electrically connected to the second end of the target inductor (T2) and the controlled end of the relay (RLY1), the negative electrode of the polar capacitor (U9) is used for grounding, and the control end of the relay (RLY1) is used for electrically connecting to the overcurrent warning device.

7. A vehicle-mounted power conversion method, characterized in that: The vehicle-mounted power conversion method is applied to a vehicle-mounted power conversion device, wherein the vehicle-mounted power conversion device comprises a current rectification circuit, wherein the current rectification circuit comprises a switch driving module (101), a switch control module (102), a current rectification module (103) and an energy storage module (104), wherein: The receiving end of the switch driving module (101) is used to electrically connect to the sending end of the adjustment signal sending module (105); the driving end of the switch driving module (101) is electrically connected to the controlled end of the switch control module (102); the control end of the switch control module (102) and the output end of the energy storage module (104) are both electrically connected to the input end of the current rectifier module (103); the input end of the energy storage module (104) is used to electrically connect to the voltage end of a preset power input device (106); and the output end of the current rectifier module (103) is used to electrically connect to the power end of the target load (107); The method comprises: When the switch driving module (101) receives the first level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105), it is in the target conduction state and controls the switch control module (102) to be turned on; When the switch control module (102) is turned on, the energy storage module (104) is in an energy storage state; When the switch driving module (101) receives the second level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105), it is in a target non-conducting state and releases the target charge accumulated by the switch control module (102) to disconnect the switch control module (102); When the switch control module (102) is disconnected, the current rectification module (103) performs a rectification operation on the superimposed current formed by the back electromotive force generated by the energy storage module (104) based on the pre-stored energy and the output voltage of the power input device (106), obtains a rectified current, and transmits the rectified current to the target load (107); Wherein, the first level signal is a high level signal, and the second level signal is a low level signal; The switch driving module (101) comprises a first diode (D3) and a PNP transistor (Q10), wherein: The anode of the first diode (D3) and the base of the PNP transistor (Q10) are both used to electrically connect to the sending end of the adjustment signal sending module (105), the cathode of the first diode (D3) and the emitter of the PNP transistor (Q10) are both electrically connected to the controlled end of the switch control module (102), and the collector of the PNP transistor (Q10) is used to be grounded; When the switch driving module (101) receives the first level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105), it is in the target conduction state and controls the switch control module (102) to be turned on, including: When the first diode (D3) receives the high-level signal, it is in a conducting state; when the first diode (D3) receives the high-level signal, the PNP transistor (Q10) is in a disconnected state to control the switch control module (102) to be turned on; When the switch driving module (101) receives the second level signal determined according to the output voltage of the power input device (106) and sent by the adjustment signal sending module (105), it is in a target non-conducting state and releases the target charge accumulated by the switch control module (102) to disconnect the switch control module (102), comprising: When the first diode (D3) receives the low-level signal, it is in a non-conducting state; when the first diode (D3) receives the low-level signal, the PNP transistor (Q10) is in a conducting state and releases the target charge accumulated by the switch control module (102), so that the switch control module (102) is disconnected.

8. The vehicle-mounted power conversion method according to claim 7, characterized in that: The vehicle-mounted power conversion device further includes a leakage detection circuit, which includes an electrical signal recognition module, an amplification module, and a leakage protection module, wherein: The input end of the electric signal identification module is electrically connected to the output end of the current rectification module (103); the output end of the electric signal identification module is used to electrically connect to the power supply end of the target load (107); the signal sending end of the electric signal identification module is electrically connected to the signal receiving end of the amplification module; the signal sending end of the amplification module is electrically connected to the signal receiving end of the leakage protection module; and the control end of the leakage protection module is electrically connected to the controlled end of the switch control module (102); The method further comprises: During the process of the current rectification module (103) transmitting the rectified current to the target load (107), when the electrical signal recognition module receives an abnormal electrical signal, it generates a voltage to be recognized based on the abnormal electrical signal and transmits the voltage to be recognized to the amplification module; The amplifying module performs a voltage amplification operation on the voltage to be identified to obtain an amplified voltage, and transmits the amplified voltage to the electrical signal identification module; The electrical signal recognition module determines whether the voltage value of the amplified voltage is greater than or equal to a preset first voltage threshold, and if so, controls the switch control module (102) to be disconnected, and controls the current rectification module (103) to be disconnected, so that the current rectification module (103) is in a no-current output state; Furthermore, the vehicle-mounted power conversion device further includes an overcurrent trigger protection circuit, which includes a voltage detection module, an overcurrent feedback module, and a protection switch control module, wherein: The detection end of the voltage detection module is electrically connected to the output end of the current rectification module (103), the energy transmission end of the voltage detection module is electrically connected to the input end of the overcurrent feedback module, the output end of the voltage detection module is electrically connected to the input end of the electrical signal transformer (T1), the control end of the overcurrent feedback module is electrically connected to the controlled end of the protection switch control module, and the control end of the protection switch control module is used to electrically connect to a preset overcurrent reminder device; The method further comprises: During the process of the current rectification module (103) transmitting the rectified current to the target load (107), when the voltage value of the target voltage formed based on the rectified current is greater than a preset second voltage threshold, the voltage detection module performs an electric signal oscillation operation to increase the electric field energy stored in the overcurrent feedback module; When the electric field energy stored in the overcurrent feedback module increases to a preset electric field energy threshold, the protection switch control module is in an on state to trigger the overcurrent reminder device to perform an overcurrent reminder operation.

9. A vehicle-mounted inverter, comprising a housing and a circuit board, characterized in that: The circuit board includes the vehicle-mounted power conversion device according to any one of claims 1-6.

Images