CN111341961A

CN111341961A - Power management system and energy system

Info

Publication number: CN111341961A
Application number: CN202010150802.6A
Authority: CN
Inventors: 陈胜利; 杨顺奇; 宋积文; 温建全; 王智超
Original assignee: No 750 Test Field of China Shipbuilding Industry Corp; CNOOC Information Technology Co Ltd
Current assignee: No 750 Test Field of China Shipbuilding Industry Corp; CNOOC Information Technology Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-06-26

Abstract

The invention relates to a power management system and an energy system. The power management system comprises a structure body, a circuit board and a heat dissipation device, wherein the structure body is a hollow cylinder, the circuit board is arranged on an outer cylindrical surface of the structure body, the heat dissipation device is arranged at one end of the structure body, heat dissipation holes are formed in the peripheral surface of the other end of the structure body, and the heat dissipation holes are located below the circuit board. The invention supplies power to the underwater navigation body, so that the navigation body avoids the defects of winding, small moving range and high requirement on a mother ship caused by the adoption of the traditional umbilical cable for power supply.

Description

Power management system and energy system

Technical Field

The invention relates to the technical field of underwater detection, in particular to a power management system and an energy system of a structure underwater corrosion detection system.

Background

In recent years, the development of marine oil and gas in China is vigorously developed, and equipment and technical level of marine oil and gas detection are remarkably improved and greatly improved. The marine structure is a basic facility for the development of marine oil and gas fields, more than 200 offshore production facilities are built in Bohai sea, south sea and east sea in China, and a large-scale seabed pipe network is built in cooperation with the marine production facilities. Various production facilities of offshore oil and gas fields are not threatened by corrosion all the time, not only a great deal of material is wasted, but also oil and gas leakage caused by corrosion and damage of marine structures cause a plurality of catastrophic accidents, so that the marine corrosion problem increasingly attracts attention of relevant units in the field of marine oil development. Therefore, ensuring the safe operation of marine structures, researching the corrosion characteristics of materials in seawater environment, and detecting and monitoring the corrosion state of structures in real time have become a focus of urgent solution, and are receiving wide attention from all the world. Therefore, the underwater part of the structure needs to be regularly inspected and deeply detected, the corrosion condition of the underwater part is known, the current situation of the corrosion state is mastered, hidden dangers are timely found and eliminated, and the safe operation of the marine structure is guaranteed.

The marine corrosion detection refers to corrosion monitoring of offshore facilities such as a jacket, a semi-submersible platform and a FPSO (floating production storage and offloading), and the monitoring contents mainly comprise corrosion morphology, protection potential, outer wall damage and defect conditions, sacrificial anode consumption conditions and the like. Because marine environment's particularity does not possess the convenient condition that onshore structure can look over and detect repeatedly, and jacket structure is complicated relatively, and marine structure's corrosion detection has characteristics such as the degree of difficulty is big, with high costs, needs the detection boats and ships and the detecting instrument who is applicable to marine environment.

At present, corrosion detection methods mainly adopted by marine structures comprise a cathodic protection monitoring system and underwater special detection. The cathodic protection monitoring system can master the potential conditions of the jacket and the sacrificial anode in real time, but is limited by the installation position of the probe, the monitoring range is limited, the corrosion condition of the whole can be reflected, but the local part cannot be reflected; underwater special inspections are typically performed by divers or ROVs, whose operation is limited in depth (depths below 40 meters, which are difficult to operate with conventional diving) and is inefficient. For the underwater corrosion detection of shallow marine structures, China mainly depends on divers and underwater Robots (ROVs), and has the disadvantages of large limitation, low safety and low operation efficiency; for the detection of submarine pipelines and underwater facilities with the depth of hundreds of meters, a cabled remote control type underwater Robot (ROV) is basically adopted to detect the corrosion condition, and the ROV needs the support of a mother ship working on the water surface during operation, so the use cost is high. Is not suitable for regular routine inspection. But in short distance and complex environment, the operator is needed to operate the underwater vehicle more flexibly. Therefore, it is needed to develop a device for underwater corrosion detection of marine structures, which can reduce ship support, reduce operation cost, save inspection time, and can be operated manually and flexibly to complete the underwater corrosion inspection task of marine structures.

Disclosure of Invention

The invention aims to provide a power management system and an energy system for an underwater navigation corrosion detection system, which are used for ensuring that the underwater navigation corrosion detection system can safely, efficiently, flexibly and conveniently detect the corrosion condition of an underwater marine structure.

The invention firstly provides a power management system, which carries out power conversion and distribution on a battery pack system, the power management system mainly comprises a structural body, a circuit board and a heat dissipation device, wherein,

the structure body is a hollow cylinder, the circuit board is arranged on the outer cylinder surface of the structure body, the heat dissipation device is arranged at one end of the structure body, heat dissipation holes are formed in the peripheral surface of the other end of the structure body, and the heat dissipation holes are located below the circuit board.

The system is designed to be attached to a cylindrical structure so that it fits easily into a round compartment. The hollow structure is convenient for air circulation and heat dissipation.

According to an embodiment of the present invention, the heat dissipation device is disposed at a center position of one end portion of the structural body, and the heat dissipation device includes a heat dissipation fan.

According to an embodiment of the present invention, the number of the heat dissipation holes is plural, and the plural heat dissipation holes are in a honeycomb array.

According to one embodiment of the invention, the structure is a hollow hexagonal prism.

According to one embodiment of the present invention, a heat conductive silicone grease is disposed between the circuit board and the structure.

According to one embodiment of the invention, the power management system is provided in a watertight compartment provided with a watertight hatch. The watertight hatch cover is convenient for heat dissipation.

The invention also provides an energy system which comprises a battery system and the power management system, wherein the power management system carries out power conversion and distribution on the battery system.

According to one embodiment of the invention, the power management system is disposed in the control cabin, and the battery system is disposed in the battery cabin.

According to one embodiment of the invention, the battery system comprises a battery pack, the battery pack comprises a battery pack module and a management system module, and the management system module detects and transmits information to the battery pack module.

According to an embodiment of the present invention, the management system module includes a temperature acquisition unit, a total voltage acquisition unit, a total current acquisition unit, a fault alarm unit, a parallel module voltage acquisition unit, a management system communication unit, and a maintenance communication unit, the temperature acquisition unit is configured to acquire the temperature of the battery pack, the total voltage acquisition unit is configured to acquire the total voltage of the battery pack, the total current acquisition unit is configured to acquire the total current of the battery pack, the fault alarm unit is configured to alarm a detected fault, the parallel module voltage acquisition unit is configured to acquire the voltage of the parallel module, the management system communication unit is configured to communicate acquired data, and the maintenance communication unit is configured to maintain communication.

According to one embodiment of the invention, the battery pack module comprises battery cells and a holder, the battery cells are fixed on the holder, and the outline of the battery pack module is circular. Therefore, the battery pack can be conveniently placed in the round cabin, and the battery pack with small volume and large volumetric specific energy can be formed in an effective space.

According to one embodiment of the invention, the number of the battery single cells is multiple, and each section of the battery single cells is connected in series or in parallel; the battery pack module includes one or more, and when being a plurality of, a plurality of the battery pack modules are stacked, and the whole appearance is circular. The plurality of modules may be connected in series and/or in parallel.

According to one embodiment of the invention, the battery pack is provided with a master control switch, the master control switch is arranged outside the watertight cabin, and the control switch is a watertight connector and is controlled by a relay.

According to one embodiment of the invention, the battery pack supplies power to a mission load device and to a navigation body self device, the mission load device comprising a detection device and the navigation body self device comprising a thruster.

According to one embodiment of the invention, the thrusters comprise a main thruster, a lateral thruster and a vertical thruster; the battery system further comprises a charging device, and the charging device is used for charging and discharging the battery pack.

The power management system is designed to be a circular structure which is designed for meeting the pressure bearing requirement of the watertight cabin, so that the power management system is required to be arranged in the cylindrical watertight cabin with limited space, in order to reduce the occupied space as much as possible, the common-mode design is carried out, the cross section of the power supply system is designed to be cylindrical, the system circuit board is arranged on the side surface of the prism, the heat dissipation structure is arranged between the driving circuit and the side surface and at the end part, and the heat dissipation structure is arranged between the driving circuit and the side surface and between the driving circuit and the end part of the driving circuit, so that the heat generated by the driving circuit can be well conducted away while the space in the cylinder is fully utilized, and the heat exchange is carried out.

The battery system and the power management system are arranged in two separate cabins, so that the connection between the power management system and the equipment control system is convenient, the storage space of the battery is not occupied, and the configuration is more efficient.

The battery system can form the battery pack with small volume and large volumetric specific energy in an effective space, and can effectively manage the battery pack, thereby ensuring the safe and efficient operation of the system.

The power supply and energy system is used for supplying power to the underwater navigation body, so that the navigation body avoids the defects of winding, small moving range and high requirement on a mother ship caused by the adoption of the traditional cable power supply, and the navigation carrier has the comprehensive performance advantages of safety, high efficiency, flexibility and convenience.

Drawings

FIG. 1 is a schematic view of the overall structure (upper shell facing the reader) of the underwater corrosion detection device for a structure according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of the underwater corrosion detection device (the lower shell faces the reader) of the structure according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of the overall structure of the underwater corrosion detection device (with the upper housing removed) according to one embodiment of the present invention;

FIG. 4 is a schematic view of the overall structure of the underwater corrosion detection device for a structure (the bottom of the lower shell faces the reader) according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a battery compartment according to an embodiment of the present invention;

FIG. 6 is a schematic view of a control cabin according to an embodiment of the present invention;

FIG. 7a is a schematic structural diagram of a control cabin according to an embodiment of the present invention;

FIG. 7b is a schematic diagram of the exploded structure of FIG. 7 a;

FIG. 7c is a schematic cross-sectional view of FIG. 7 a;

FIG. 7d is a schematic diagram illustrating the heat dissipation operation of FIG. 7 a;

FIG. 8a is a schematic diagram of a battery compartment according to an embodiment of the present invention;

fig. 8b is a schematic cross-sectional view of a battery module according to an embodiment of the present invention;

fig. 8c is a schematic perspective view illustrating a battery module according to an embodiment of the present invention;

FIG. 8d is a schematic view of a portion of a hatch cover according to an embodiment of the invention;

fig. 9a is a schematic structural diagram of an energy system according to an embodiment of the invention;

FIG. 9b is a schematic diagram of a switch control according to an embodiment of the present invention;

reference numerals:

1 front upper buoyancy housing, 2 propeller cage, 3 right front vertical propeller, 4 power supply buoyancy housing, 5 upper middle buoyancy housing, 6 optical fiber guide bar, 7 optical fiber cluster, 8 optical fiber, 9 upper rear buoyancy housing, 10 upper vision camera, 11 main propeller, 12 rear vertical propeller, 13 strobe light, 14USBL beacon, 15 rear lateral propeller, 16 beidou surface positioning device, 17 bail, 18 front lateral propeller, 19 left front vertical propeller, 20 cathodic protection monitoring probe device, 21 left front camera light, 22 front camera, 23 right front camera light, 24 image sonar, 25 rear lower camera, 26 lower buoyancy housing, 27 altimeter, 28 control cabin, 29 battery cabin, 30 bearing frame, 31 main buoyancy body, 32 watertight connector, 33BMS (battery management system module), 34 battery pack, 35 water intake sensor, 36 power management system, 37 control system components, 38 intelligent course attitude measurement system, 39 communication system;

341 battery pack module, 361 structural body, 362 circuit board, 363 heat dissipation device, 364 heat dissipation holes, 3631 heat dissipation fan, 3632 fan protection cover, 281 cabin body, 282 front cabin cover, 283 rear cabin cover, 291 front cabin cover, 292 cabin body, 293 rear cabin cover, 3411 battery monomer, 3412 holder, 343 charge-discharge interface, 344 communication interface and 40 power supply management cabin.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

The underwater corrosion detection integrated device for the marine structures can effectively solve the problem of underwater corrosion detection and evaluation of the marine structures in the industry mainly based on the marine oil and gas development industry, the marine structures such as a marine oil platform have the characteristics of large depth, wide coverage area and the like, most of the structures have higher service life and face risks such as high corrosion degree, reduced effective bearing capacity of the structures and the like, and by intelligently detecting and evaluating the corrosion degree of the structures, on one hand, the integrated device can effectively avoid accidents such as structural collapse, marine oil and gas leakage and the like caused by corrosion of the structures, on the other hand, the integrated device can efficiently complete corrosion detection tasks, and brings potential economic benefits for the marine oil industry. In combination with the defects of the background art, the invention aims to provide a navigation body and a related equipment system, which can reduce the winding risk of an umbilical cable of a traditional navigation carrier, overcome the defects of small moving range and high requirement on a mother ship, and safely, efficiently, flexibly and conveniently detect the underwater corrosion condition of a marine structure.

The navigation body main body adopts a high-strength framework and a slender open type special-shaped structure. The appearance is long and thin flat cuboid, and a plurality of high definition camera and high definition image sonar are arranged to the front, upper and lower of navigation body altogether, and the internal withstand voltage cabin that arranges of navigation is used for placing battery, control assembly, information transmission subassembly etc..

As shown in FIG. 1, the underwater corrosion detection device for the structure of the invention mainly comprises a shell, a pressure-resistant cabin, a detection element group, a propulsion assembly and a communication optical fiber, wherein,

as shown in fig. 3, the pressure-resistant cabin comprises a battery cabin 29 and a control cabin 28, the battery cabin 29 mainly contains a battery pack, and the control cabin 28 mainly contains control system components and a power management system.

The pressure-resistant cabin body is arranged in the shell.

The detection element group is arranged on the shell.

The propelling component is arranged on the shell.

As shown in fig. 1, one end of the communication optical fiber 8 is connected to the water communication equipment, and the other end is arranged on the housing in the form of an optical fiber ball 7 and connected to the control cabin 28. The optical fiber may be guided via a fiber guide rod 6. The fiber guide rod 6 is preferably a flexible guide rod.

The technical scheme of the invention can be used for self-providing the battery on the underwater vehicle (the device), and does not need a cable to be connected with the water electric equipment unlike the traditional underwater vehicle, so the action is flexible, only a thin optical fiber is needed to be connected with the water electric equipment, and the initiative of paying off is arranged on the vehicle, thereby avoiding the trouble that the vehicle can not sail once the water cable is wound by arranging a cable group on the water electric equipment, and effectively overcoming the contradiction that the AUV (cableless underwater robot) can not be completely adapted to the actual complex marine environment and the unknown task requirement due to the limitation of the current intelligent level when the AUV works in a fully autonomous mode.

According to one embodiment of the invention, the housing has the shape of an elongated flat cuboid. The design makes the water resistance when in motion smaller.

According to one embodiment of the invention, the housing comprises a lower buoyant housing 26 and an upper buoyant housing connected together.

As shown in fig. 4, the lower buoyant casing 26 comprises a fixedly connected load-bearing frame 30 and a main buoyant body 31 according to an embodiment of the present invention.

According to one embodiment of the invention, the detection element group comprises a structure detection element group and a device detection element group, wherein the structure detection element group comprises a detection probe and/or a sampling manipulator; the device detection group comprises an attitude sensor, a temperature sensor, a salinity sensor, an underwater sound positioning device and an image pickup element.

According to one embodiment of the invention, the detection probe of the invention is a cathodic protection monitoring probe.

The device is provided with equipment such as a camera and an image sonar, can find obstacles (such as a fishing net) in time, avoids being entangled by the obstacles, and ensures the safety of the system.

In general, an ROV (underwater robot) can be divided into two types, namely a towing cable and a non-towing cable, and for the ROV with the towing cable, the resistance value of the resistance value is gradually increased along with the increase of the length of the towing cable, which means that when the ROV performs a longer distance task, the voltage drop and the loss in the towing cable are larger, and for the towing cables with different distances, the voltage drop and the loss are different. When the supply voltage at the streamer input is constant, the voltage at the streamer output will be different. The propeller has higher requirements on the quality of a power supply, requires a small input voltage fluctuation range, puts higher requirements on a power supply management system, and has larger weight and larger resistance in water when being dragged by an ROV. Therefore, the ROV (underwater robot or navigation body) designed by the invention adopts a towrope-free form, a battery pack is arranged in the navigation body, the voltage output by the battery pack is supplied to all electric equipment after passing through a power management system, the problem of voltage drop caused by overlong towropes does not need to be considered, and the extra resistance caused by the towropes does not need to be considered when a propeller is selected.

In the operation process of the navigation body, image information, feedback information, sonar information, sensor information and the like need to be transmitted to the water surface control platform through the optical cable, and the water surface control platform transmits a control instruction to the ROV through the optical cable according to the received feedback information, so that the ROV and the equipment and the sensors carried by the ROV are controlled to work.

Because the ROV is supplied with power by the battery, the optical cable only has a communication function, and the total communication data volume is not large, the invention only adopts one optical fiber to realize the communication between the water surface control equipment and the underwater ROV.

The micro optical fiber can be released from the underwater navigation body coil and unfolded with little force, and a bidirectional and large-capacity communication link is formed between the navigation carrier and the water surface remote control platform and is used for manual intervention of the navigation carrier in operation engineering, real-time transmission of information and the like, so that the safe and efficient detection operation of the navigation carrier in a complex environment is ensured.

The micro optical cable is used for replacing a traditional cable, an underwater paying-off mode is adopted, and meanwhile, the system has a remote control and semi-autonomous working mode; the navigation carrier has the advantages of safety, high efficiency, flexibility and convenience in comprehensive performance due to the diversity of the working modes and the quick switchable function of the navigation carrier, greatly reduces the defects of umbilical cable winding, small moving range and high requirement on a mother ship of the traditional navigation carrier on one hand, and effectively overcomes the contradiction that the AUV cannot completely adapt to the actual complex marine environment and the unknown task requirement due to the limitation of the current intelligent level when the AUV works autonomously on the other hand.

Because the navigation body is an automatic power supply, the design of the battery system and the power supply system is extremely critical, and not only the limited space needs to be reasonably utilized, but also the safe, reliable and efficient operation of the system needs to be ensured. The system of this section is further described below.

The present invention provides a power management system, as shown in fig. 7a, which is disposed in the control cabin 28, and performs power conversion and distribution on the battery pack system.

As shown in fig. 7b, the power management system 36 mainly includes a structural body 361, a circuit board 362 and a heat sink 363, wherein,

the structure 361 is a hollow cylinder, the circuit board 362 is disposed on the outer cylinder of the structure 361, the heat dissipation device 363 is disposed on one end of the structure, heat dissipation holes 364 are disposed on the circumference of the other end of the structure, and the heat dissipation holes 364 are located under the circuit board 362.

The shape of the heat dissipation hole 364 is not limited, and is preferably circular.

According to an embodiment of the present invention, the heat sink is disposed at a center of one end of the structure, and the heat sink 363 includes a heat dissipating fan 3631 and a fan shield 3632.

According to an embodiment of the present invention, the heat dissipation holes 364 are plural, and preferably, the plural heat dissipation holes are in a honeycomb array.

The main content of the work of the power management system is to boost the voltage of the battery system and stabilize the voltage, the boosting process has certain efficiency, certain power loss exists in the conversion, and a large amount of heat can be generated when the power management system operates under a high-power working condition, so that how to take away the heat is very important for reducing local high temperature.

The system adopts a fan forced airflow cooling mode to prevent the overheating problem, and the cooling fan is arranged at the center of the cross section, so that the heat of the circuit board on each surface of the column body can be uniformly radiated.

When the air-conditioning fan works, as shown in fig. 7d, the central fan sucks air from the end of the fan and sweeps air towards the other end, air flows through the honeycomb hole array at the end part of the cylinder, the air flows to the outer side from the inner cavity of the cylinder, flows towards the fan end through the outer wall surface of the cylinder and passes through the power management circuit board, partial heat generated by the circuit board can be taken away, and local high temperature is effectively reduced, so that the normal operation of a circuit is guaranteed.

According to one embodiment of the present invention, the structure 361 is a hollow hexagonal prism. Of course, other column configurations are possible.

According to an embodiment of the present invention, a thermal grease is disposed between the circuit board 362 and the structure 361.

According to one embodiment of the invention, the power management system 36 is disposed within a watertight compartment, which is provided with a watertight compartment cover. The watertight hatch facilitates heat exchange.

As shown in fig. 7b and 7c, the power management system 36 and the control system assembly 37 can be housed in the same watertight compartment (control compartment), which can be cylindrical in shape (or other shapes, without limitation) for pressure bearing.

The control cabin 28 mainly comprises a cabin 281, a front cabin cover 282 and a rear cabin cover 282, wherein the rear cabin cover 282 may be provided with a watertight connector 32.

According to one embodiment of the present invention, the power management system is located in the control compartment 28 and the battery system is located in the battery compartment 29.

Of course, the power management system and the battery system can be arranged reasonably in other modes according to the actual cabin.

A schematic version of the battery compartment 29 is shown in fig. 8 a.

According to an embodiment of the present invention, the battery system mainly includes a battery pack, and the battery pack 34 mainly includes a battery pack module and a management system module, and the management system module performs detection and information transmission on the battery pack module.

The battery pack stores energy required by the navigation body in the form of chemical energy, converts the energy into electric energy and outputs the electric energy through the output ends (total positive and total negative) of the battery pack. The power management system is responsible for performing buck-boost conversion and distribution on the electric energy output by the battery pack so as to meet the power consumption requirement of the rear-stage equipment.

Of course, the battery system may also include other accessories or structural members such as connecting cables.

The battery compartment 29 is mainly provided with a front compartment cover 291, a compartment body 292, and a rear compartment cover 293.

According to one embodiment of the invention, the management system module further comprises a temperature acquisition unit, a total voltage acquisition unit, a total current acquisition unit, a fault alarm unit, a parallel module voltage acquisition unit, a management system communication unit, a maintenance communication unit and the like.

The management system module can adopt an integrated modular design, temperature detection cables of all modules of the battery pack and single battery voltage acquisition cables are all collected in the management system module, and the management system can be rapidly installed and replaced conveniently. The management system module can realize real-time detection on the temperature of the battery pack module and the voltage of the parallel module; when the battery pack works, the total voltage, the total current, the capacity, the state information and the like of the battery pack CAN be detected in real time, and the information is uploaded to a task management center through a CAN bus.

Furthermore, the management system module can adopt an MCU (microprogrammed control Unit) as a processor, collected data are transmitted to the MCU for processing through the temperature collection unit, the total voltage collection unit, the total current collection unit, the fault alarm unit, the module voltage collection unit and the management system communication unit, and total voltage, total current, capacity and state information are transmitted to the task management center through the battery pack management system module interface in an airborne state.

The management system module mainly realizes the following functions: (1) monitoring physical parameters of the battery in real time; (2) estimating the state of the battery; (3) online diagnosis and early warning; (4) charging, discharging and pre-charging control; (5) balance management, thermal management, and the like. And when the state of the battery pack is abnormal, the management system module sends an alarm signal to the fault alarm device through the I/O port, and when the state of the battery pack is abnormal, the management system module sends the alarm signal to the charging equipment.

As shown in fig. 8b and 8c, according to an embodiment of the present invention, the battery module 341 further includes a battery cell 3411 and a holder 3412, the battery cell 3411 is fixed to the holder 3412, and the external contour of the battery module is preferably circular. Therefore, the battery pack can be conveniently placed in the round cabin, and the battery pack with small volume and large volumetric specific energy can be formed in an effective space.

Because the lithium ion battery has the advantages of high specific energy, long service life, convenient use and maintenance and the like, the lithium ion battery pack is preferably adopted as a secondary battery pack, and the battery pack has the capability of repeated charge and discharge, can be recycled and has longer service life.

According to one embodiment of the invention, the number of the battery single cells is multiple, and each section of the battery single cells is connected in series or in parallel; the battery module includes one or more, and when a plurality of battery modules are provided, the plurality of battery modules are stacked, connected in series or in parallel, and have a substantially circular overall shape.

In order to ensure the safety and convenience of operation, the battery pack is provided with a master switch which can disconnect the battery pack from the device during charging or discharging. Because the ROV works in the water depth environment of 0-300m, the design of the switch has to have waterproof reliability and convenient operation, and the switch has to meet the overcurrent capacity of a steady state 50A in the use process.

According to one embodiment of the invention, the battery pack is provided with a master control switch, which is arranged outside the watertight compartment, as shown in fig. 8d, on the hatch cover. The control switch is a watertight connector 32 and is controlled by a relay. The hatch may also be provided with a charge/discharge interface 343, a communication interface 344, and the like.

According to one embodiment of the invention, the battery pack supplies power to a mission load device and to a navigation body self device, the mission load device comprising a detection device and the like, and the navigation body self device comprising a propeller and the like.

According to an embodiment of the invention, the thrusters comprise a main thruster, a lateral thruster and a vertical thruster.

The battery system may further include a charging device for charging and discharging the battery pack.

The power management system is designed to be approximately round because the power management system is suitable for the pressure bearing requirement of the watertight cabin, so that the power management system is required to be arranged in the cylindrical watertight cabin with limited space, in order to reduce the occupied space as much as possible, the common-mode design is carried out, the cross section of the power supply system is designed to be cylindrical, the system circuit board is arranged on the side surface of the prism, the heat dissipation structures are arranged between the driving circuit and the side surface and at the end part of the driving circuit, and the heat dissipation structures are arranged at the hollow part for air circulation, so that the space in the cylinder is fully utilized, the heat generated by the driving circuit can be well conducted away, and the heat exchange is carried out to the outside through the watertight cabin cover.

Example 1

The integrated device for detecting the underwater corrosion of the marine structure distributes signals (CAN bus/Ethernet) and electric energy (trunk line distribution) to all parts, units or nodes of a general system by relying on a power supply management system, a central exchange system, a data collection and processing system and remote control information transmitted by an optical fiber and a sound remote control device from the water surface, so as to complete power supply on-off, information forwarding, digital I/O driving and the like.

As shown in fig. 4, when the detection device is installed, first, the carrier frame 30 is welded and molded according to the overall layout of the device, and then bonded to the main buoyant body 31 by using a buoyant material to form the lower buoyant casing 26, and the propeller cover 2 is installed on the main buoyant body 31 by using screws and reinforcing nuts.

As shown in fig. 5, a watertight connector 32, a BMS (battery management system module) 33, a battery pack 34, and a water inflow sensor 35 are installed in the battery compartment 29; as shown in FIG. 6, another watertight connector 32, water intake sensor 35, power management system 36, control system components 37, intelligent heading attitude measurement system 38, and communication system 39 are installed within control cabin 28.

As shown in fig. 1, then, the right front vertical thruster 3, the top view camera 10, the main thruster 11, the rear vertical thruster 12, the strobe light 13, the USBL (ultra short baseline positioning system) beacon 14, the rear lateral thruster 15, the beidou surface positioning device 16, the front lateral thruster 18, the left front vertical thruster 19, the cathodic protection monitoring probe device 20, the left front camera light 21, the front camera 22, the right front camera light 23, the image sonar 24, the rear lower camera 25, and the altimeter 27 are mounted on the lower buoyant housing 26; the front upper buoyancy housing 1 and the upper rear buoyancy housing 9 are mounted in position on the lower buoyancy housing 26.

Finally, as shown in fig. 3 and 1, the control cabin 28, the battery cabin 29, the upper middle buoyancy housing 5 and the power supply buoyancy housing 4 are installed at corresponding positions of the lower buoyancy housing 26, and as shown in fig. 1, the optical fiber flexible guide rod 6, the micro-fiber bulk 7 and the micro-fiber 8 are installed on the upper middle buoyancy housing 5. The micro optical fiber 8 can be released from the micro optical fiber cluster 7 and unfolded with little force, a bidirectional and large-capacity communication link is formed between the navigation carrier and the water surface remote control platform, the optical fiber breaking tension is 110N, and the optical fiber breaking tension is used for manual intervention of the navigation carrier in an operation project, real-time transmission of information and the like, so that safe and efficient detection operation of the navigation carrier in a complex environment is ensured.

The cathodic protection monitoring probe device 20 utilizes the electromagnetic adsorption principle, makes the navigation carrier relatively stable for between the sounding body when carrying out cathodic protection probe and surveys, reduces the interference that the ocean current environment caused the underwater navigation body, provides a relatively stable operation environment for the cathodic protection detects under water, and then protects the probe, improves measurement accuracy and detection efficiency.

As shown in fig. 7b, the power management system 36 mainly includes a structural body 361, a circuit board 362 and a heat dissipation device 363, wherein the structural body 361 is a hollow cylinder, the circuit board 362 is disposed on an outer cylinder of the structural body 361, the heat dissipation device 363 is disposed on one end of the structural body, a heat dissipation hole 364 is disposed on a peripheral surface of the other end of the structural body, and the heat dissipation hole 364 is located under the circuit board 362.

The heat dissipation hole 364 is circular in shape. The louvers 364 are arranged in a honeycomb array.

Other parts not described are as described in the embodiments.

Example 2

The arrangement connection of the battery system and the power management system in the present embodiment is shown in fig. 9a, wherein the battery system is disposed in the battery compartment 29 and the power management system 36 is disposed in the power management compartment 40.

The electric energy output by the battery pack 34 of the battery system is converted into three paths of electricity of 12V, 24V and 150V respectively through 3 DC-DC voltage changers of the power management system 36, and is supplied to a propeller motor control board, a control system, each device and a propeller.

The battery compartment 29 contains therein 5 battery modules 341 and 5 slave management components (i.e., management system module 33), a master (i.e., control part of the power management system 36) contained in the power management compartment 40, and three power modules (part of the power management system 36) of 12V, 24V, and 150V.

A battery management system module with functions of acquisition, judgment and protection based on voltage, temperature and current, wherein

The functions and parameters of the slave control board are as follows:

10-path single-body voltage measurement: the single-section voltage measurement error in the full working range is less than or equal to +/-2 mV;

2-way module temperature measurement: the error of single-point temperature measurement in the whole working range is less than or equal to +/-2 ℃;

the device has a balancing function, and the balancing current is more than 100 mA;

communication: the communication function is provided;

the functions of the main control board of the power management system 36 are:

the control provides power for the slave control, and reads the voltage and temperature information of all batteries through an internal bus;

controlling to provide power for the current sensor and reading the information of the current sensor through an internal bus;

the control capability of a charge and discharge relay under emergency conditions (overvoltage, undervoltage, overcurrent, high temperature and low temperature) is realized;

the 150V power module of the control power module supplies power to the propeller, the 24V power module supplies power to equipment, a control circuit and the like, and the 12V power module supplies power to a control panel of a motor of the propeller.

When the electric vehicle is used, the battery pack is arranged in the cabin body and is communicated with a product to start power supply;

the battery pack uses a management system interface to communicate with the task management center through a CAN bus, namely, the voltage, the current, the capacity and the state of the battery pack are reported to the task management center in real time.

In the on-board use process of the battery pack, the battery pack has the function of uploading voltage, current, temperature and residual capacity in real time.

When the battery pack is overdischarged and the temperature exceeds a set value, the management system module sends a signal to the alarm through the I \0 port and sends a state abnormity report to the task management center.

And (3) charging process:

the charging equipment uses a special cable to connect the charging and discharging interface of the battery pack to charge the battery pack.

The battery pack is charged at a constant current, and is charged at a constant voltage when the charging limiting voltage is reached, and the battery pack stops charging when the charging current is smaller than a set value.

The invention relates to a total output circuit for controlling a battery by using a relay in implementation, which specifically comprises the following steps:

the power module is used for supplying power directly by the battery pack, the output end of the power module is connected to the control end of a high-current contactor, and the load end of the contactor is connected with the anode of the battery pack. When the control switch is closed, the control end of the contactor is connected with 12V voltage, the load end of the contactor is sucked, and the anode is connected; when the control switch is switched off, the control end of the contactor has no voltage, the load end of the contactor is bounced off under the action of the elastic force of the spring, and the positive electrode is switched off. The control circuit principle is shown in fig. 9 b.

In order to facilitate opening and closing, the control switch is required to be arranged outside the watertight cabin, the use requirement of bearing pressure of 300m is required to be considered, the control switch used in the embodiment is a two-core watertight connector, one end (male end) of the connector has watertight capacity and has two forms, one form is that the two cores are in short circuit, which is equivalent to connection; and the other two cores are not short-circuited and are equivalent to disconnection. When the master is required to be switched on, inserting a short male connector; when the total disconnection timing is needed, the disconnected male head is inserted.

The watertight connector has higher cost, and the more the use amount is, the more the connector is inconvenient to use, and the reliability of the watertight connector is reduced. In order to reduce the number of external watertight connectors as much as possible, the charging interface and the discharging interface of the battery pack are combined in the project, and the charging working condition and the discharging working condition are judged and switched through a battery pack management system (BMS).

The battery pack needs to be arranged in a watertight cabin for sealing, and because the shape of the inner wall of the watertight cabin is circular, the space in the cabin cannot be fully utilized by the commonly used square battery monomers, a 18650 battery monomer array is adopted, a certain heat dissipation gap needs to be reserved between the monomers, the outer sections and the sections are closely arranged, the characteristics of small size and standardized shape of the 18650 battery monomers are fully utilized, and a plurality of sections 18650 of the monomers are finally arranged into a battery pack module with a roughly circular outer contour by utilizing a preprocessed monomer holder. According to the requirements of capacity and voltage, the unit sections are connected in series or in parallel, and the modules are stacked, so that the battery pack with small volume and large volumetric specific energy can be formed in an effective irregular space.

In order to facilitate assembly and facilitate electrical signal collection and line arrangement, the battery pack is divided into 5 modules in the embodiment, each module includes 10 18650 (a type) battery cells connected in series and 13 in parallel, and a standardized battery cell connection design in a honeycomb briquette shape is adopted in each module, so that the space is saved to the maximum extent, and meanwhile, the safety of the battery cell is effectively ensured. A schematic cross-sectional view of each module is shown in fig. 8b and an outline is shown in fig. 8 c.

Other parts which are not described above refer to the content of the detailed description.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiments are merely illustrative of the present invention, and various components and devices of the embodiments may be changed or eliminated as desired, not all components shown in the drawings are necessarily required, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, and all equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the scope of the present invention.

Claims

1. A power management system comprising a structure, a circuit board, and a heat sink, wherein,

2. The power management system of claim 1, wherein the heat sink is disposed at a center of one end of the structure, and the heat sink comprises a heat dissipation fan.

3. The power management system of claim 1 or 2, wherein the number of heat dissipation holes is multiple, and the multiple heat dissipation holes are in a honeycomb array.

4. The power management system of claim 1 or 2, wherein the structure is a hollow hexa-cylindrical body.

5. The power management system of claim 1 or 2, wherein a thermally conductive silicone grease is provided between the circuit board and the structure.

6. The power management system of claim 1 or 2, wherein the power management system is provided within a watertight compartment, the watertight compartment being provided with a watertight hatch.

7. An energy system, characterized in that the energy system comprises a battery system and the power management system of any one of claims 1 to 6, and the power management system performs power conversion and distribution on the battery system.

8. The energy system of claim 7, wherein the power management system is disposed in a control compartment and the battery system is disposed in a battery compartment.

9. The energy system according to claim 7 or 8, wherein the battery system comprises a battery pack, the battery pack comprises a battery pack module and a management system module, and the management system module detects and transmits information to the battery pack module.

10. The energy system according to claim 9, wherein the management system module comprises a temperature acquisition unit, a total voltage acquisition unit, a total current acquisition unit, a fault alarm unit, a parallel module voltage acquisition unit, a management system communication unit and a maintenance communication unit, the temperature acquisition unit is used for acquiring the temperature of the battery pack, the total voltage acquisition unit is used for acquiring the total voltage of the battery pack, the total current acquisition unit is used for acquiring the total current of the battery pack, the fault alarm unit is used for alarming a detected fault, the parallel module voltage acquisition unit is used for acquiring the voltage of the parallel module, the management system communication unit is used for communicating the acquired data, and the maintenance communication unit is used for maintaining communication.

11. The energy system according to claim 9 or 10, wherein the battery module comprises a battery cell and a holder, the battery cell is fixed on the holder, and the outline of the battery module is circular.

12. The energy system according to claim 11, wherein the number of the battery cells is plural, and each of the battery cells is connected in series or in parallel; the battery pack module includes one or more, and when being a plurality of, a plurality of the battery pack modules are stacked, and the whole appearance is circular.

13. The energy system according to claim 9, 10 or 12, wherein the battery pack is provided with a master control switch, the master control switch is arranged outside the watertight cabin, and the control switch is a watertight connector and is controlled by a relay.

14. Energy system according to claim 9 or 10 or 12, characterized in that said battery pack supplies power to a mission load device comprising detection means and to a self-contained device comprising thrusters.

15. The energy system of claim 14, wherein the thrusters comprise a main thruster, a lateral thruster, and a vertical thruster; the battery system further comprises a charging device, and the charging device is used for charging and discharging the battery pack.