Long-endurance UUV power-to-electric instrument power supply device

Abstract

The present invention provides a long-endurance UUV power-to-instrument power supply device, enabling the long-endurance UUV to fully utilize energy when performing special tasks such as underwater silent monitoring. The power supply device includes: a power battery pack, an instrument battery pack, a mechanical switch, a control unit, a power converter, and an instrument power switching circuit. The control unit is configured to monitor the instrument battery pack voltage in real time and activate the power converter and switching circuit when the instrument battery pack voltage falls below a preset voltage threshold. The power converter is configured to convert the power battery pack's power electricity into instrument power. The instrument power switching circuit is configured to seamlessly switch instrument power from the instrument battery pack to the power battery pack output. The mechanical switch is configured to turn the UUV on and off.

Description

Technical Field

[0001] The present invention belongs to the field of UUV power supply, and in particular relates to a long-endurance UUV power-to-electricity instrument power supply device. Background Art

[0002] UUV energy systems typically utilize battery packs. To meet electromagnetic compatibility requirements, these packs are typically divided into high-voltage power batteries and low-voltage instrument batteries. Power batteries are typically used for high-power devices such as propulsion motors and actuators, while instrument batteries are typically used to power low-power devices such as control computers. The capacities of these two packs are configured based on the energy consumption of typical missions. However, UUV missions are complex and varied. During certain mission phases, such as extended periods of underwater inactivity, the instrument battery packs can deplete prematurely, leaving the control computer without power, leading to mission failure. However, during these periods, the power battery packs often have sufficient capacity. To optimize energy allocation, it is necessary to design a power supply device that converts the UUV's power supply into instrument power to ensure full utilization of the vehicle's energy. Summary of the Invention

[0003] The purpose of the present invention is to provide a long-endurance UUV power-to-electric instrument power supply device, which can enable the long-endurance UUV to fully utilize energy when performing special tasks such as underwater silent monitoring.

[0004] The technical solution of the present invention is: a long-endurance UUV power-to-electric instrument power supply device, comprising: a power battery pack, an instrument battery pack, a mechanical switch, a control unit, a power converter and an instrument power switching circuit;

[0005] The control unit is used to monitor the voltage of the instrument battery pack in real time, and when the voltage of the instrument battery pack is lower than a preset voltage threshold, start the power converter and the switching circuit;

[0006] The power converter is used to convert the power electricity of the power battery pack into instrument electricity;

[0007] The instrument power switching circuit is used to seamlessly switch the instrument power from the instrument battery pack to the power battery pack output;

[0008] The mechanical switch is used to turn the UUV on and off.

[0009] Furthermore, the power converter uses the instrument power output by itself to close the switch between the power battery pack and the power converter, thereby forming a self-locking state.

[0010] Furthermore, the mechanical switch has two pairs of linked contacts, one pair of contacts is used to turn the UUV on and off, and the other pair of contacts is used to release the self-locking of the power converter.

[0011] Furthermore, the power converter includes: a DC-DC, a DC contactor K3 and a DC contactor K4;

[0012] The DC contactor K3 has a coil K3A and a normally open contact K3B;

[0013] The DC contactor K4 has a coil K4A and a normally open contact K4B;

[0014] The normally open contact K3B of the DC contactor K3 and the normally open contact K4B of the DC contactor K4 are connected in parallel, one end of which is connected to the positive electrode of the power battery pack, and the other end is connected to the positive input terminal of the DC-DC;

[0015] The negative electrode of the power battery pack is directly connected to the negative electrode of the DC-DC input terminal.

[0016] Furthermore, the electrical switching circuit of the instrument includes: relay K1, relay K2, relay K6, relay K7, relay K8 and action delay relay K5;

[0017] The relay K1 has a coil K1A and two pairs of contacts, wherein the two pairs of contacts are contact K1B and contact K1C, and both contact K1B and contact K1C can be regarded as single-pole double-throw switches, each having a normally open end and a normally closed end;

[0018] The relay K2 has a coil K2A ​​and a normally open contact K2B;

[0019] The relay K6 has a coil K6A and a normally open contact K6B;

[0020] The relay K7 has a coil K7A, a normally open contact K7B, a normally open contact K7C and a normally open contact K7D;

[0021] The relay K8 has a coil K8A, a normally open contact K8B and a normally open contact K8C;

[0022] The action delay relay K5 has a coil K5A and a normally closed contact K5B;

[0023] The coil K1A of the relay K1, the normally closed contact K5B of the action delay relay K5, and one pair of contacts of the mechanical switch are connected in series to the positive and negative terminals of the instrument battery pack; the coil K4A of the DC contactor K4 and the other pair of contacts of the mechanical switch are connected to the positive and negative terminals of the instrument power at the DC-DC output terminal; the positive and negative terminals of the instrument power at the DC-DC output terminal are respectively connected to the positive and negative terminals of the terminal block via the normally closed terminals of the contact K1B and the normally closed terminals of the contact K1C of the relay K1; the positive and negative terminals of the instrument battery pack are respectively connected to the positive and negative terminals of the terminal block via the normally open terminals of the contact K1B and the normally open terminals of the contact K1C of the relay K1;

[0024] The coil K5A of the action delay relay K5 is connected in series with the normally open contact K7D of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the coil K8A of the relay K8 is connected in series with the normally open contact K7C of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contact K6B of the relay K6 is connected in parallel with the normally open contact K7B of the relay K7, and then connected in series with the coil K7A of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contacts K8B and K8C of the relay K8 are connected in parallel with the normally closed ends of the contacts K1B and K1C of the relay K1, respectively;

[0025] The normally open contact K2B of the relay K2 and the coil K3A of the DC contactor K3 are connected in series and then connected between the positive and negative poles of the output terminal of the terminal block;

[0026] The relay K2 and the relay K6 are driven by a control unit.

[0027] Beneficial effects:

[0028] The present invention can monitor the voltage of the instrument battery pack in real time. When the voltage of the instrument battery pack is lower than the preset voltage threshold, the power consumption of the instrument is seamlessly switched from the instrument battery pack to the power battery pack output, so that the long-endurance UUV can fully utilize energy when performing special tasks such as underwater silent monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a connection diagram of the power supply device of the present invention in a non-working state;

[0030] Figure 2 The schematic diagram of the instrument battery pack and power converter instrument connected in parallel as the instrument electrical output;

[0031] Figure 3 The schematic diagram of the power battery pack outputting power to the instrument through the power converter. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] This embodiment provides a power supply device for converting power from the power of a long-endurance UUV to instrument power, which can enable the long-endurance UUV to fully utilize energy when performing special tasks such as underwater silent monitoring.

[0034] like Figure 1 As shown, the power-to-electric instrument power supply device includes: a power battery pack, an instrument battery pack, a mechanical switch, a control computer, a power converter and an instrument power switching circuit.

[0035] The instrument battery pack is used for the initial power supply of all instruments and equipment of the UUV including the control computer.

[0036] The control computer is used to monitor the voltage of the instrument battery pack in real time, and when the voltage of the instrument battery pack is lower than a preset voltage threshold, the power converter and the switching circuit are started.

[0037] The power converter is used to convert the power electricity of the power battery pack into instrument electricity; the power converter includes: DC-DC, DC contactor K3 and DC contactor K4; DC contactor K3 has a coil K3A and a normally open contact K3B, and DC contactor K4 has a coil K4A and a normally open contact K4B; the normally open contact K3B of DC contactor K3 and the normally open contact K4B of DC contactor K4 are connected in parallel, one end of which is connected to the positive pole of the power battery pack and the other end is connected to the positive pole of the DC-DC input; the negative pole of the power battery pack is directly connected to the negative pole of the DC-DC input; thus, the power electricity can be converted into instrument electricity through the power converter, and the coil and contact of DC contactor K4 can form an interlock at both ends of the DC-DC, so that the power converter outputs instrument electricity independent of the power supply of the instrument battery pack.

[0038] The instrument power switching circuit is used to seamlessly switch the instrument power from the instrument battery pack to the power battery pack output; the instrument power switching circuit includes: relay K1, relay K2, relay K6, relay K7, relay K8 and action delay relay K5;

[0039] Among them, relay K1 is the main relay of the instrument power controller, which has a coil K1A and two pairs of contacts (contact K1B and contact K1C respectively). Contact K1B and contact K1C can be regarded as single-pole double-throw switches, both with normally open and normally closed ends; relay K2 has a coil K2A ​​and a normally open contact K2B; relay K6 has a coil K6A and a normally open contact K6B; relay K7 has a coil K7A, a normally open contact K7B, a normally open contact K7C and a normally open contact K7D; relay K8 has a coil K8A, a normally open contact K8B and a normally open contact K8C; action delay relay K5 has a coil K5A and a normally closed contact K5B.

[0040] The mechanical switch has two pairs of linked contacts (open or closed simultaneously), one pair of contacts is used to turn the UUV on and off, and the other pair of contacts is used to release the internal self-locking of the power converter.

[0041] The coil K1A of relay K1, the normally closed contact K5B of the action delay relay K5, and one pair of contacts of the mechanical switch are connected in series to the positive and negative terminals of the instrument battery pack; the coil K4A of the DC contactor K4 and the other pair of contacts of the mechanical switch are connected to the positive and negative terminals of the instrument power at the DC-DC output terminal; the positive and negative terminals of the instrument power at the DC-DC output terminal are respectively connected to the positive and negative terminals of the terminal block through the normally closed terminals of the contact K1B of the relay K1 and the normally closed terminals of the contact K1C; the positive and negative terminals of the instrument battery pack are respectively connected to the positive and negative terminals of the terminal block through the normally open terminals of the contact K1B of the relay K1 and the normally open terminals of the contact K1C.

[0042] The coil K5A of the action delay relay K5 and the normally open contact K7D of the relay K7 are connected in series and then connected between the positive and negative poles of the instrument at the DC-DC output end; the coil K8A of the relay K8 and the normally open contact K7C of the relay K7 are connected in series and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contact K6B of the relay K6 and the normally open contact K7B of the relay K7 are connected in parallel, and then connected in series with the coil K7A of the relay K7 and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contact K8B and the normally open contact K8C of the relay K8 are connected in parallel with the normally closed end of the contact K1B and the normally closed end of the contact K1C of the relay K1 respectively.

[0043] The normally open contact K2B of the relay K2 and the coil K3A of the DC contactor K3 are connected in series and then connected between the positive and negative poles of the output terminal of the terminal block.

[0044] Relay K2 and relay K6 are driven by a control computer, that is, the control computer controls coil K2A ​​and coil K6A, driving normally open contact K2B and normally open contact K6B to close.

[0045] The working principle of the power supply device of the power conversion instrument is:

[0046] When the UUV is powered on, the mechanical switch is closed, energizing coil K1A. Contacts K1B and K1C are both switched to the normally open position. The instrument battery pack outputs instrument power through the terminal block, and the control computer and other automatic power-on devices begin operation. The control computer monitors the instrument battery pack voltage in real time. When the monitored instrument battery pack voltage falls below a preset threshold, the control computer controls relays K2 and K6 to close (i.e., normally open contacts K2B and K6B close). The drive only lasts for approximately two seconds. After two seconds, relay K2 is controlled to open (i.e., normally open contact K2B opens). At this time, coil K3A is de-energized, and normally open contact K3B opens.

[0047] When the normally open contact K2B is closed, the coil K3A is energized and the normally open contact K3B of the DC contactor K3 is closed, so that the DC-DC input terminal is connected and the output conversion instrument power is turned on; the coil K4A is energized and the normally open contact K4B is closed. At this time, the DC contactor K4 and the DC-DC form an input-output lock, and the power converter no longer relies on the output of the instrument battery pack for power supply. This process takes milliseconds to complete and can be completed before the normally open contact K2 of the relay K2 is disconnected.

[0048] When relay K6 is closed (i.e., the normally open contact K6B is closed), coil K7A is energized, and the normally open contact K7B of relay K7 is closed. At this time, the coil and contact of relay K7 are interlocked, and the power supply is no longer dependent on the output of the instrument battery pack. At the same time, after coil K7A is energized, the normally open contact K7C of relay K7 is closed, and then coil K8A of relay K8 is energized, so that the normally open contacts K8B and K8C of relay K8 are closed. At this time, the instrument battery pack and the power converter instrument are electrically connected in parallel as the instrument power output, as shown in FIG. Figure 2 shown.

[0049] Because the battery pack of the instrument is about to run out of power and the voltage is low, when it is connected in parallel with the power converter instrument, the power converter may charge the instrument battery pack, thereby damaging the DC-DC inside the power converter. After confirming that the power converter instrument has successfully participated in the output, it is necessary to disconnect the instrument battery pack output as soon as possible; based on this, an action delay relay K5 is set, and the coil K5A of the action delay relay K5 is connected in series with the normally open contact K7D of the relay K7. After the coil K7A is energized, the normally open contact K7D of the relay K7 is closed. A few seconds after the normally open contact K7D is closed, the normally closed contact K5B of the action delay relay K5 is disconnected, the coil K1A is de-energized, and the contacts K1B and K1C of the relay K1 are switched from the normally open end to the normally closed end. At this time, the instrument battery pack is disconnected from the instrument output circuit; if Figure 3 Setting the K5 action delay relay also prevents the situation where, when the two normally open contacts of relay K8 close to connect the DC-DC output instrument power to the system, the two contacts of relay K1 simultaneously switch from normally open to normally closed, disconnecting the instrument battery pack from the system power supply. This may cause an unstable state and cause the control computer to power off and restart.

[0050] Once the entire switching process is complete, without human intervention, the UUV will continue to operate until the power battery pack is depleted. If the UUV needs to be powered off during commissioning, the mechanical switch can be turned to the off position, which will de-energize the DC contactor K4 coil K4A and the normally open contact K4B of the DC contactor K4, thus disconnecting the entire UUV.

[0051] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A power supply device for converting power from UUV power to instrument power during long flight, characterized in that: include: Power battery pack, instrument battery pack, mechanical switch, control unit, power converter and instrument electrical switching circuit; The control unit is used to monitor the voltage of the instrument battery pack in real time, and when the voltage of the instrument battery pack is lower than a preset voltage threshold, start the power converter and the switching circuit; The power converter is used to convert the power electricity of the power battery pack into instrument electricity; The instrument power switching circuit is used to seamlessly switch the instrument power from the instrument battery pack to the power battery pack output; The mechanical switch is used to turn the UUV on and off; The power converter includes: DC-DC, DC contactor K3 and DC contactor K4; The DC contactor K3 has a coil K3A and a normally open contact K3B; The DC contactor K4 has a coil K4A and a normally open contact K4B; The normally open contact K3B of the DC contactor K3 and the normally open contact K4B of the DC contactor K4 are connected in parallel, one end of which is connected to the positive electrode of the power battery pack, and the other end is connected to the positive input terminal of the DC-DC; The negative electrode of the power battery pack is directly connected to the negative electrode of the DC-DC input terminal; The instrument electrical switching circuit includes: relay K1, relay K2, relay K6, relay K7, relay K8 and action delay relay K5; The relay K1 has a coil K1A and two pairs of contacts, wherein the two pairs of contacts are contact K1B and contact K1C, and both contact K1B and contact K1C can be regarded as single-pole double-throw switches, each having a normally open end and a normally closed end; The relay K2 has a coil K2A ​​and a normally open contact K2B; The relay K6 has a coil K6A and a normally open contact K6B; The relay K7 has a coil K7A, a normally open contact K7B, a normally open contact K7C and a normally open contact K7D; The relay K8 has a coil K8A, a normally open contact K8B and a normally open contact K8C; The action delay relay K5 has a coil K5A and a normally closed contact K5B; The coil K1A of the relay K1, the normally closed contact K5B of the action delay relay K5, and one pair of contacts of the mechanical switch are connected in series to the positive and negative terminals of the instrument battery pack; the coil K4A of the DC contactor K4 and the other pair of contacts of the mechanical switch are connected to the positive and negative terminals of the instrument power at the DC-DC output terminal; the positive and negative terminals of the instrument power at the DC-DC output terminal are respectively connected to the positive and negative terminals of the terminal block via the normally closed terminals of the contact K1B and the normally closed terminals of the contact K1C of the relay K1; the positive and negative terminals of the instrument battery pack are respectively connected to the positive and negative terminals of the terminal block via the normally open terminals of the contact K1B and the normally open terminals of the contact K1C of the relay K1; The coil K5A of the action delay relay K5 is connected in series with the normally open contact K7D of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the coil K8A of the relay K8 is connected in series with the normally open contact K7C of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contact K6B of the relay K6 is connected in parallel with the normally open contact K7B of the relay K7, and then connected in series with the coil K7A of the relay K7, and then connected between the positive and negative poles of the instrument at the DC-DC output end; the normally open contact K8B and the normally open contact K8C of the relay K8 are connected in parallel with the normally closed end of the contact K1B and the normally closed end of the contact K1C of the relay K1, respectively; The normally open contact K2B of the relay K2 and the coil K3A of the DC contactor K3 are connected in series and then connected between the positive and negative poles of the output terminal of the terminal block; The relay K2 and the relay K6 are driven by a control unit.

2. The long-endurance UUV power-to-electricity power supply device according to claim 1, characterized in that: The power converter uses the instrument power output by itself to close the switch between the power battery pack and the power converter, thereby forming a self-locking state.

3. The long-endurance UUV power-to-electricity power supply device as claimed in claim 2, characterized in that: The mechanical switch has two pairs of linked contacts, one pair of which is used to turn the UUV on and off, and the other pair of which is used to release the self-locking of the power converter.

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