High voltage power distribution unit, aircraft power distribution system, and aircraft

Abstract

The application provides a high-voltage power distribution unit, and relates to the technical field of aircraft batteries.The high-voltage power distribution unit comprises: a positive electrode of a battery module connected with a first end of a main circuit, a first end of a charging circuit and a first end of a low-voltage power distribution circuit; a second end of the main circuit connected with a first end of at least one load circuit; a second end of the charging circuit connected with a first end of a charging seat; a second end of the low-voltage power distribution circuit connected with a first end of a power conversion box; a negative electrode of the battery module connected with a third end of the main circuit; a fourth end of the main circuit connected with a second end of the charging seat, a second end of the at least one load circuit and a second end of the power conversion box; a controller used for sending a target control instruction to a battery management system according to a detected target signal; and the battery management system used for determining a target mode according to the target control instruction and controlling the closing state of a relay according to the target mode to realize mode switching and improve the accuracy of mode switching.

Description

Technical Field

[0001] This application relates to the field of aircraft battery technology, and in particular to a high-voltage power distribution unit, an aircraft power supply and distribution system, and an aircraft. Background Technology

[0002] With the rapid development of aviation technology, the electrical system architecture of aircraft is becoming increasingly complex. Modern electric aircraft, such as drones and electric vertical takeoff and landing (eVTOL) aircraft, are usually equipped with high-energy-density battery packs as their sole power source, and provide power to multiple propulsion motors, flight control computers, avionics equipment and auxiliary systems through power supply and distribution systems.

[0003] In related technologies, traditional aircraft power supply and distribution systems have relatively simple architectures with fewer load circuits. Their control logic typically follows a basic sequence: closing the main negative relay—closing the pre-charge relay—closing the main positive relay—opening the pre-charge relay. This simple timing control logic is applicable to systems with fewer circuit components, but it cannot control more complex electrical architectures. Therefore, improving the accuracy of mode switching and control is crucial in complex architectures. Utility Model Content

[0004] This application provides a high-voltage power distribution unit, an aircraft power supply and distribution system, and an aircraft.

[0005] According to a first aspect of this application, a high-voltage power distribution unit is provided, comprising:

[0006] The main circuit, at least one load circuit, a charging circuit, a low-voltage power distribution circuit, a battery management system and controller;

[0007] The main circuit includes a main positive relay, a main negative relay, and a pre-charge relay; the charging circuit includes a charging positive relay; the load circuit includes a load relay; and the low-voltage distribution circuit includes a low-voltage distribution relay and a low-voltage pre-charge relay.

[0008] The positive terminal of the battery module is connected to the first end of the main circuit, the first end of the charging circuit, and the first end of the low-voltage power distribution circuit, respectively. The second end of the main circuit is connected to the first end of the at least one load circuit. The second end of the charging circuit is connected to the first end of the charging socket. The second end of the low-voltage power distribution circuit is connected to the first end of the power conversion box. The negative terminal of the battery module is connected to the third end of the main circuit, respectively. The fourth end of the main circuit is connected to the second end of the charging socket, the second end of the at least one load circuit, and the second end of the power conversion box, respectively.

[0009] The controller is used to send target control commands to the battery management system based on the detected target signal;

[0010] The battery management system is used to determine the target mode according to the target control command, and control the closing state of the relay according to the target mode to achieve mode switching.

[0011] Optionally, the main circuit includes a pre-charge resistor, the low-voltage distribution circuit includes a low-voltage pre-charge resistor, and the load circuit includes a load;

[0012] The positive terminal of the battery module is connected to the first terminal of the main positive relay, the first terminal of the pre-charge resistor, the first terminal of the low-voltage pre-charge resistor, and the first terminal of the low-voltage distribution relay, respectively.

[0013] The second terminal of the precharge resistor is connected to the first terminal of the precharge relay;

[0014] The second terminal of the main positive relay is connected in parallel with the second terminal of the precharge relay and then connected to the first terminal of the charging positive relay and the first terminal of the load relay. The second terminal of the load relay is connected to the positive input terminal of the load.

[0015] The second terminal of the low-voltage pre-charge resistor is connected to the first terminal of the low-voltage pre-charge relay, and the second terminal of the low-voltage pre-charge relay and the second terminal of the low-voltage distribution relay are respectively connected to the first terminal of the power conversion box.

[0016] The first terminal of the main negative relay is connected to the negative terminal of the battery module, and the second terminal of the main negative relay is connected to the negative input terminal of the load.

[0017] Optionally, the battery management system is used to control the closing state of the main positive relay, the main negative relay, the load relay, the pre-charge relay, the charging positive relay, the low-voltage distribution relay, or the low-voltage pre-charge relay according to the target control sequence corresponding to the target mode.

[0018] Optionally, the battery management system is used to control the closing state of the main positive relay, the main negative relay, the load relay, the precharge relay, the charging positive relay, the low-voltage distribution relay, or the low-voltage precharge relay according to the target control sequence corresponding to the target mode and at preset time intervals.

[0019] Optionally, the main circuit includes a main fuse, and the load circuit includes a load fuse;

[0020] The first end of the main fuse is connected to the positive terminal of the battery module, the second end of the main fuse is connected to the first end of the main positive relay, the second end of the main positive relay is connected to the first end of the load fuse, and the second end of the load fuse is connected to the first end of the load relay. The Joule integral value of the main fuse is greater than the Joule integral value of the load fuse.

[0021] Optionally, the low-voltage power distribution circuit includes a low-voltage power distribution fuse;

[0022] The first end of the low-voltage distribution fuse is connected to the second end of the main fuse, and the second end of the low-voltage distribution fuse is connected to the first end of the low-voltage pre-charge resistor and the first end of the low-voltage distribution relay, respectively.

[0023] Optionally, the main circuit includes a shunt;

[0024] The first end of the shunt is connected to the negative terminal of the battery module, and the second end of the shunt is connected to the first end of the main negative relay.

[0025] Optionally, the main circuit includes a first Hall sensor, the load circuit includes a second Hall sensor, and the low-voltage distribution circuit includes a third Hall sensor;

[0026] The copper busbar connecting the negative terminal of the battery module to the first end of the shunt passes through the first Hall sensor.

[0027] The copper busbar connected to the second terminal of the main negative relay and the negative terminal of the load passes through the second Hall sensor, and the copper busbar connected to the negative terminal of the power conversion box passes through the third Hall sensor.

[0028] According to a second aspect of this application, an aircraft power supply and distribution system is provided, the aircraft power supply and distribution system including any of the high-voltage power distribution units described above.

[0029] According to a third aspect of this application, an aircraft is provided, the aircraft including any of the above-described aircraft power supply and distribution systems.

[0030] In summary, the high-voltage power distribution unit provided in this application has at least the following beneficial effects: The high-voltage power distribution unit includes a main circuit, at least one load circuit, a charging circuit, a low-voltage power distribution circuit, a battery management system, and a controller. The controller can send a target control command to the battery management system based on the detected target signal. The battery management system can determine the target mode based on the target control command and control the closing state of each relay according to the target mode. Thus, even under a complex electrical architecture, mode switching and mode control can be quickly performed, improving the accuracy of mode switching and control, and thereby ensuring the safety and reliability of aircraft operation. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of a high-voltage power distribution unit provided for an embodiment of this application;

[0033] Figure 2 A schematic diagram of another high-voltage power distribution unit provided for an embodiment of this application;

[0034] Figure 3 A schematic diagram of a power-on and power-off process provided for an embodiment of this application;

[0035] Figure 4 A schematic diagram illustrating the closed state of each relay in standby mode, provided for an embodiment of this application;

[0036] Figure 5 A schematic diagram illustrating the closed states of relays under low-voltage power distribution, provided for an embodiment of this application;

[0037] Figure 6 A schematic diagram of the closed states of each relay in the main circuit precharge-1 provided for an embodiment of this application;

[0038] Figure 7 A schematic diagram showing the closed states of each relay in the main circuit pre-charge-2 according to an embodiment of this application;

[0039] Figure 8 A schematic diagram showing the closed state of each relay in a normal mode, provided for an embodiment of this application;

[0040] Figure 9A schematic diagram showing the closed state of each relay in a charging mode, provided for an embodiment of this application;

[0041] Figure 10 A schematic diagram showing the closed state of each relay in a debugging mode, provided for an embodiment of this application;

[0042] Figure 11 A schematic diagram showing the closed state of each relay in a preheating mode, provided for an embodiment of this application;

[0043] Figure 12 A schematic diagram illustrating the closed states of each relay under high-voltage load, provided for an embodiment of this application;

[0044] Figure 13 This is a schematic diagram illustrating an application example of a high-voltage power distribution unit provided in an embodiment of this application. Detailed Implementation

[0045] To make the above and other features and advantages of this application clearer, the application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art, and are exemplary only, not restrictive.

[0046] In the following description, numerous specific details are set forth to provide a thorough understanding of this application. However, it will be apparent to those skilled in the art that the specific details are not required to practice this application. In other instances, well-known steps or operations have not been described in detail to avoid obscuring this application.

[0047] Figure 1 This application provides a high-voltage power distribution unit.

[0048] refer to Figure 1 As shown, this application provides a high-voltage power distribution unit (PDU), including a main circuit, at least one load circuit, a charging circuit, a low-voltage power distribution circuit, a battery management system, and a controller.

[0049] The main circuit may include a main positive relay, a main negative relay, and a pre-charge relay; the load circuit may include a load relay; the charging circuit may include a charging positive relay; and the low-voltage distribution circuit may include a low-voltage distribution relay and a low-voltage pre-charge relay.

[0050] The positive terminal of the battery module is connected to the first end of the main circuit, the first end of the charging circuit, and the first end of the low-voltage power distribution circuit. The second end of the main circuit is connected to the first end of at least one load circuit. The second end of the charging circuit is connected to the first end of the charging socket. The second end of the low-voltage power distribution circuit is connected to the first end of the power conversion box. The negative terminal of the battery module is connected to the third end of the main circuit. The fourth end of the main circuit is connected to the second end of the charging socket, the second end of at least one load circuit, and the second end of the power conversion box.

[0051] The number of battery modules can be one or more. Multiple battery modules are connected in series. For example, if a single battery module is 200V, four battery modules connected in series will have a total voltage of 800V, which can be used to provide high-voltage power to meet the power needs of high-power equipment and improve energy transmission efficiency.

[0052] Furthermore, there can be one or more load circuits, and their number and specific uses can be determined according to the configuration requirements of the actual aircraft. For example, load circuit 1 can be used to connect propulsion motor inverter 1A, load circuit 2 can be used to connect propulsion motor inverter 2B, load circuit 3 can be used to connect propulsion motor inverter 4A, load circuit 4 can be used to connect propulsion motor inverter 5B, load circuit 5 can be used to connect air conditioning compressor, etc. This application does not limit this.

[0053] In addition, the low-voltage power distribution circuit can be connected to the power conversion box, so that the high-voltage DC power can be converted into low-voltage DC power through the power conversion box, and then the low-voltage power distribution unit can supply power to the control, communication, sensing and other related load devices of the whole machine.

[0054] Understandably, different control signals correspond to different modes. For example, the main power switch closing signal corresponds to standby mode; the internal enable signal after self-test completion corresponds to low-voltage power distribution pre-charge mode; the maintenance port cover physical switch closing signal or the central maintenance socket connection signal corresponds to debugging mode; the flight key in the start position key connection signal; the main circuit pre-charge completion and bus voltage stability confirmation signal corresponds to normal mode; the charging gun connection signal corresponds to power supply mode; the liquid chiller connection signal corresponds to preheating mode; the flight key closing signal corresponds to high-voltage load power-off mode, and so on. In different modes, the closing state of each relay is also different; that is, each relay has a corresponding closing state in each mode.

[0055] Therefore, in this embodiment, the correspondence between various signals and control commands, as well as the mapping relationship between each control command and the mode and the closed state of the relays, can be pre-set. Thus, after detecting a target signal, the controller can determine the target control command corresponding to that signal and send it to the battery management system. Upon receiving the target control command, the battery management system can determine the target mode based on the command and control the closed state of the main positive relay, main negative relay, load relay, charging positive relay, pre-charge relay, low-voltage distribution relay, or low-voltage pre-charge relay according to the target mode, thereby achieving mode switching. Thus, even with a complex electrical architecture, mode switching and mode control can be performed quickly, improving the accuracy of mode switching and control, and ensuring the safety and reliability of aircraft operations.

[0056] It should be noted that, Figure 1 The devices and connections shown are illustrative and can be adjusted as needed; this application does not impose any limitations on them.

[0057] Understandably, in Figure 1 Based on this, the main circuit can also include a pre-charge resistor, the low-voltage distribution circuit can also include a low-voltage pre-charge resistor, and the load circuit also includes the load. The following will combine... Figure 2 The high-voltage power distribution unit provided in this application will be further described.

[0058] The positive terminal of the battery module can be connected to the first terminal of the main positive relay, the first terminal of the pre-charge resistor, the first terminal of the low-voltage pre-charge resistor, and the first terminal of the low-voltage distribution relay. The second terminal of the pre-charge resistor can be connected to the first terminal of the pre-charge relay. The second terminal of the main positive relay can be connected in parallel with the second terminal of the pre-charge relay and then connected to the first terminal of the charging positive relay and the first terminal of the load relay. The second terminal of the load relay is connected to the positive input terminal of the load. The second terminal of the low-voltage pre-charge resistor is connected to the first terminal of the low-voltage pre-charge relay. The second terminals of the low-voltage pre-charge relay and the low-voltage distribution relay are respectively connected to the first terminal of the power conversion box. The first terminal of the main negative relay is connected to the negative terminal of the battery module, and the second terminal of the main negative relay is connected to the negative input terminal of the load.

[0059] Understandably, when the positive and negative relays need to close simultaneously, the negative relay can be closed first, followed by the positive relay. This establishes a safe current return path in advance, preventing accidental circuit breaks caused by floating potential. Conversely, when the positive and negative relays need to disconnect simultaneously, the positive relay can be disconnected first, followed by the negative relay. This prioritizes power disconnection, ensuring the system quickly enters a de-energized state, thus effectively improving reliability and safety.

[0060] Optionally, to further ensure electrical safety, in actual use, the main circuit and at least one load circuit can be connected by a high-voltage copper busbar, and this application does not limit this.

[0061] It is understandable that the corresponding control sequence may be the same or different under different target modes. In the embodiments of this application, standby mode, normal mode, debugging mode, charging mode, preheating mode, low-voltage power distribution pre-charging mode, main circuit pre-charging mode, and high-voltage load power-off mode may have different power-on or power-off procedures. For example, as... Figure 3 As shown, power-on process 1 is standby mode - low-voltage distribution pre-charge - debugging mode - main circuit pre-charge - normal mode - charging mode; power-on process 2 is standby mode - low-voltage distribution pre-charge - main circuit pre-charge - normal mode - charging mode; power-on process 3 is standby mode - low-voltage distribution pre-charge - main circuit pre-charge - preheating mode - normal mode - charging mode; power-off process 1 is debugging mode - standby mode; power-off process 2 is charging mode - normal mode - high-voltage load power-off - standby mode; power-off process 3 is preheating mode - high-voltage load power-off - standby mode. Therefore, in this embodiment, the battery management system can first determine the corresponding target control sequence, i.e., determine the corresponding power-on or power-off process, according to the target mode. Then, according to one or more modes included in the power-on or power-off process, it sequentially controls the main positive relay, main negative relay, load relay, pre-charge relay, charging positive relay, low-voltage distribution relay, or low-voltage pre-charge relay according to the on / off state of the relays in each mode.

[0062] For example, taking the power-on process as an example, in such a case... Figure 4 In the standby mode shown, all relays are in the open state. If switching to low-voltage distribution pre-charge is continued, the main negative relay and the low-voltage pre-charge relay can be controlled to be in the closed state, while the remaining relays remain in the open state. Figure 5 As shown. Afterwards, if switching from low-voltage distribution pre-charging to main circuit pre-charging, it needs to go through the following steps... Figure 6 The main circuit precharge-1 shown is as follows: Figure 7 The main circuit pre-charge 2 shown can be controlled in the first stage by closing the low-voltage distribution relay, opening the low-voltage pre-charge relay, and sequentially closing the load relays 1 to 4. In the second stage, the pre-charge relay is closed. If switching from main circuit pre-charge to... Figure 8 The normal mode shown controls the main positive relay to close and the precharge relay to open. If switching from normal mode to... Figure 9 The charging mode shown allows you to control the positive charging relay to close.

[0063] Additionally, after pre-charging the low-voltage power distribution, it can be switched to commissioning mode, such as... Figure 10As shown, the system can control the low-voltage distribution relay to close and the low-voltage pre-charge relay to open. Afterwards, it can switch from the commissioning mode to main circuit pre-charge-1 and main circuit pre-charge-2. After main circuit pre-charge-2, it can also switch to preheating mode, as shown... Figure 11 As shown, the main positive relay can be closed, the pre-charge relay can be opened, and the charging positive relay can be closed in sequence.

[0064] Taking the power-down process as an example, if the current mode is charging, the positive charging relay can be disconnected to switch to normal mode. If the current mode is normal and it needs to switch to power-down mode for high-voltage loads, then load relays 1 to 4 can be disconnected sequentially. Figure 12 As shown. If the current power-off is under high-voltage load and you need to switch to standby mode, you can control the main positive relay, low-voltage distribution relay, and main negative relay to disconnect sequentially. If the current power-off is under debugging mode and you need to switch to standby mode, you can control the low-voltage distribution relay and main negative relay to disconnect sequentially. If the current power-off is under preheating mode and you need to switch to high-voltage load power-off, you can control the charging relay to disconnect and load relays 1 to 4 to disconnect sequentially.

[0065] Therefore, in this embodiment of the application, the battery management system can determine the power-on / off process to be adopted based on the current mode and the target mode, and then control the on / off state of the relays according to the order of the various modes included in the power-on / off process to switch between different modes, thereby improving the accuracy of the power-on or power-off process switching, and thus improving the stability and reliability of aircraft operation.

[0066] Optionally, when multiple relays need to operate in coordination, the battery management system can control the closed state of the main positive relay, main negative relay, load relay, precharge relay, charging positive relay, low-voltage distribution relay, or low-voltage precharge relay according to the target control sequence corresponding to the target mode and at preset time intervals.

[0067] The preset time interval can be 100ms, 120ms, 150ms, etc. For example, with a preset time interval of 130ms, a relay can be activated every 130ms, which can avoid the instantaneous excessive drive current from affecting the relay drive power supply and thus effectively prevent the relay from sticking.

[0068] Optionally, the main circuit may also include a main fuse, and the load circuit may also include a load fuse.

[0069] The first end of the main fuse is connected to the positive terminal of the battery module, the second end of the main fuse is connected to the first end of the main positive relay, the second end of the main positive relay is connected to the first end of the load fuse, and the second end of the load fuse is connected to the first end of the load relay.

[0070] Among them, the Joule integral value I of the main fuse 2 t can be greater than or significantly greater than the Joule integral value of the load fuse. Therefore, in this embodiment, passive fuses can be used in both the main circuit and the load circuit. The main fuse in the main circuit has a larger Joule integral value, while the load fuse in the load circuit has a smaller Joule integral value. When a short-circuit current fault occurs, the load fuse can blow first, physically cutting off the faulty circuit. Simultaneously, the main fuse will not trip, ensuring the normal operation of the main power supply line and other loads. For short-circuit currents that do not meet the load fuse blowing condition, the battery management system can actively control the disconnection of the corresponding load circuit's load relay, thereby avoiding unnecessary blowing of the load fuse and the main fuse, achieving damage-free protection, and improving the safety and reliability of circuit protection.

[0071] Optionally, the low-voltage distribution circuit may also include a low-voltage distribution fuse.

[0072] The first end of the low-voltage distribution fuse is connected to the second end of the main fuse, and the second end of the low-voltage distribution fuse is connected to the first end of the low-voltage pre-charge resistor and the first end of the low-voltage distribution relay, respectively.

[0073] Understandably, if the main fuse fails to trip in time due to extreme conditions or accidents, the low-voltage distribution fuse can interrupt the short-circuit current leading to the low-voltage distribution circuit, thus ensuring circuit safety. Furthermore, the Joule integral value of the low-voltage distribution fuse can be set in a range much smaller than that of the main fuse but larger than the rated value of the downstream load. If a short circuit occurs within the low-voltage distribution circuit, the fault will be confined to that circuit, causing only the low-voltage distribution fuse to blow, while the main circuit and other high-voltage loads remain unaffected, further enhancing circuit safety.

[0074] Optionally, the main circuit may also include a shunt. The first end of the shunt can be connected to the negative terminal of the battery module, and the second end can be connected to the first end of the main negative relay. Thus, the shunt allows for real-time monitoring of the total battery current, enabling the battery management system to obtain a complete and reliable total battery current. Based on this current data, the system can promptly respond to abnormal conditions such as overcharging and over-discharging. Furthermore, when the current exceeds a set threshold but does not reach the condition for the load fuse to trip, the system actively controls the load relay to cut off the circuit, achieving proactive protection without damage.

[0075] Optionally, the main circuit includes a first Hall sensor, the load circuit includes a second Hall sensor, and the low-voltage distribution circuit includes a third Hall sensor.

[0076] Among them, the copper busbar connecting the negative terminal of the battery module to the first end of the shunt passes through the first Hall sensor, the copper busbar connecting the second end of the main negative relay to the negative terminal of the load passes through the second Hall sensor, and the copper busbar connecting to the negative terminal of the power conversion box passes through the third Hall sensor.

[0077] The first Hall sensor and the second Hall sensor are non-contact measuring devices. They can be measuring devices of the same type or specification. They can indirectly calculate the current value by measuring the magnetic field strength generated around the current conductor. Thus, in this embodiment, the current value measured by the first Hall sensor and the second Hall sensor can be used to determine whether each current is normal, thereby enabling real-time monitoring of the circuit current and providing a foundation for ensuring circuit safety.

[0078] In addition, when there are multiple load circuits, a second Hall sensor can be set in each load circuit. Each second Hall sensor can be used to measure the current value in its respective load circuit, thereby realizing real-time monitoring of the current in each load circuit.

[0079] It is understood that the high-voltage power distribution unit provided in this application can also adjust the components in the circuit as needed, such as adding or removing, or changing their positions. The following describes how... Figure 13 A brief explanation of the application of the high-voltage power distribution unit provided in this application is given.

[0080] The high-voltage battery pack consists of battery modules 1, 2, 3, and 4 connected in series. Each module has a configuration of 1 parallel and 48 series (1P48S), ultimately outputting a nominal 800V high-voltage DC power. Each battery module is equipped with a Cell Supervisory Circuit (CSC) responsible for monitoring the voltage and temperature of all cells within that module. All CSCs communicate with the Battery Management Unit (BMU) via an Isolated Serial Peripheral Interface (isoSPI).

[0081] Additionally, the liquid cooling mount can be used to connect the liquid cooling gun and can reflect the actual temperature of the coolant flowing into or out of the aircraft's thermal management system; the charging mount can be used to connect the charging gun and perform connection confirmation and charging wake-up; the panel can be used to wake up the main control BMU and receive signals; the central maintenance socket can be used for maintenance and debugging; and the flight control computer can be used for overall vehicle control, essentially acting as a controller. The main control BMU can be used for current acquisition and control of various relays. The power conversion box can convert high-voltage DC to low-voltage DC, and the low-voltage power distribution unit can use the low-voltage DC to charge the low-voltage battery 1, power the central maintenance socket, or perform voltage conversion via a 48V to 12V module. The high-voltage acquisition unit CSV can be used for high-voltage sampling.

[0082] Therefore, the controller can generate target control commands based on the detected target signals and send these commands to the main control unit (BMU). The main control unit (BMU) can determine the target mode based on the received target control commands and, according to the target control sequence corresponding to the target mode, control the closing state of the main positive relay, main negative relay, load relay, pre-charge relay, charging positive relay, low-voltage distribution relay, or low-voltage pre-charge relay at preset time intervals, thereby performing mode switching and control. The BMU can also, based on the collected total current value and load circuit current value, actively disconnect the load relay of the corresponding load circuit when the current exceeds a set threshold but does not reach the fuse blowing curve, thus preventing the main fuse or load fuse from blowing and achieving damage-free protection. In the event of a severe circuit break, the load fuse in the load circuit can quickly blow, providing circuit protection.

[0083] Optionally, high-voltage sampling points can be set, such as sampling points 1 to 12 in the figure. The BMU can perform high-voltage sampling through each sampling point, thereby monitoring the high-voltage direct current in real time.

[0084] This application provides an aircraft power supply and distribution system, which may include a high-voltage power distribution unit as described in the various embodiments. The number of high-voltage power distribution units may be one or more, and may be adjusted according to actual needs. This application does not limit the number of such units.

[0085] This application provides an aircraft that may include the aircraft power supply and distribution system as described in the various embodiments.

[0086] It should be understood that the various modules / units of the device of this application can be implemented wholly or partially through software, hardware, firmware, or a combination thereof. Each module / unit can be embedded in the processor of the electronic device in hardware or firmware form or independent of the processor, or it can be stored in the memory of the electronic device in software form for the processor to call to execute the operation of each module / unit. Each module / unit can be implemented as an independent component or module, or two or more modules / units can be implemented as a single component or module.

[0087] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage power distribution unit, characterized in that, include: The main circuit, at least one load circuit, a charging circuit, a low-voltage power distribution circuit, a battery management system and controller; The main circuit includes a main positive relay, a main negative relay, and a pre-charge relay; the charging circuit includes a charging positive relay; the load circuit includes a load relay; and the low-voltage distribution circuit includes a low-voltage distribution relay and a low-voltage pre-charge relay. The positive terminal of the battery module is connected to the first end of the main circuit, the first end of the charging circuit, and the first end of the low-voltage power distribution circuit, respectively. The second end of the main circuit is connected to the first end of the at least one load circuit. The second end of the charging circuit is connected to the first end of the charging socket. The second end of the low-voltage power distribution circuit is connected to the first end of the power conversion box. The negative terminal of the battery module is connected to the third end of the main circuit. The fourth end of the main circuit is connected to the second end of the charging socket, the second end of the at least one load circuit, and the second end of the power conversion box, respectively. The controller is used to send target control commands to the battery management system based on the detected target signal. The battery management system is used to determine the target mode according to the target control command, and control the closing state of the relay according to the target mode to achieve mode switching.

2. The high-voltage power distribution unit as described in claim 1, characterized in that, The main circuit includes a pre-charge resistor, the low-voltage distribution circuit includes a low-voltage pre-charge resistor, and the load circuit includes a load; The positive terminal of the battery module is connected to the first terminal of the main positive relay, the first terminal of the pre-charge resistor, the first terminal of the low-voltage pre-charge resistor, and the first terminal of the low-voltage distribution relay, respectively; the second terminal of the pre-charge resistor is connected to the first terminal of the pre-charge relay. The second terminal of the main positive relay is connected in parallel with the second terminal of the precharge relay and then connected to the first terminal of the charging positive relay and the first terminal of the load relay. The second terminal of the load relay is connected to the positive input terminal of the load. The second terminal of the low-voltage pre-charge resistor is connected to the first terminal of the low-voltage pre-charge relay, and the second terminal of the low-voltage pre-charge relay and the second terminal of the low-voltage distribution relay are respectively connected to the first terminal of the power conversion box. The first terminal of the main negative relay is connected to the negative terminal of the battery module, and the second terminal of the main negative relay is connected to the negative input terminal of the load.

3. The high-voltage power distribution unit as described in claim 2, characterized in that, The battery management system is used to control the closing state of the main positive relay, the main negative relay, the load relay, the pre-charge relay, the charging positive relay, the low-voltage distribution relay, or the low-voltage pre-charge relay according to the target control sequence corresponding to the target mode.

4. The high-voltage power distribution unit as described in claim 2, characterized in that, The battery management system is used to control the closing state of the main positive relay, the main negative relay, the load relay, the precharge relay, the charging positive relay, the low-voltage distribution relay, or the low-voltage precharge relay according to the target control sequence corresponding to the target mode and at preset time intervals.

5. The high-voltage power distribution unit as described in claim 2, characterized in that, The main circuit includes a main fuse, and the load circuit includes a load fuse; The first end of the main fuse is connected to the positive terminal of the battery module, the second end of the main fuse is connected to the first end of the main positive relay, the second end of the main positive relay is connected to the first end of the load fuse, and the second end of the load fuse is connected to the first end of the load relay. The Joule integral value of the main fuse is greater than the Joule integral value of the load fuse.

6. The high-voltage power distribution unit as described in claim 5, characterized in that, The low-voltage power distribution circuit includes a low-voltage power distribution fuse; The first end of the low-voltage distribution fuse is connected to the second end of the main fuse, and the second end of the low-voltage distribution fuse is connected to the first end of the low-voltage pre-charge resistor and the first end of the low-voltage distribution relay, respectively.

7. The high-voltage power distribution unit as described in claim 2, characterized in that, The main circuit includes a shunt; The first end of the shunt is connected to the negative terminal of the battery module, and the second end of the shunt is connected to the first end of the main negative relay.

8. The high-voltage power distribution unit as described in claim 7, characterized in that, The main circuit includes a first Hall sensor, the load circuit includes a second Hall sensor, and the low-voltage power distribution circuit includes a third Hall sensor. The copper busbar connecting the negative terminal of the battery module to the first end of the shunt passes through the first Hall sensor. The copper busbar connected to the second terminal of the main negative relay and the negative terminal of the load passes through the second Hall sensor, and the copper busbar connected to the negative terminal of the power conversion box passes through the third Hall sensor.

9. An aircraft power supply and distribution system, characterized in that, The aircraft power supply and distribution system includes a high-voltage power distribution unit as described in any one of claims 1-8.

10. An aircraft, characterized in that, The aircraft includes the aircraft power supply and distribution system as described in claim 9.

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