A battery replacement system

Abstract

The utility model discloses a power exchange system. The power exchange system is applied to ships with multi-energy access, including a DC distribution device, an AC connection device and a DC connection device; the AC connection device integrates at least one AC power interface for accessing at least one AC power generation device; the DC distribution device is connected to the AC connection device; the DC connection device integrates at least one DC power interface for accessing at least one DC power generation device; the DC distribution device is connected to the DC connection device; the DC distribution device includes a DC bus, at least one first power converter and at least one second power converter, the first power converter is connected between the AC connection device and the DC bus, and the second power converter is connected between the DC connection device and the DC bus. The technical solution provided by the embodiment of the utility model can realize the access of multiple energy generation devices, realize the power exchange operation of the ship, and improve the operation efficiency of the ship.

Description

Technical Field

[0001] The utility model relates to the technical field of ship power, and in particular to a power exchange system. Background Art

[0002] With the increasing attention paid to environmental protection around the world and the rapid development of new energy technologies, various new energy forms, such as lithium batteries, photovoltaics, supercapacitors, hydrogen fuel cells, etc., have replaced generators, or have been used in combination with generators to form hybrid power for ships. At the same time, generators powered by low-emission fuels or green fuels have been increasingly used. Dual-fuel powered ships, hybrid powered ships, pure battery powered ships, supercapacitor ships, hydrogen fuel cell ships, etc. have all been successfully demonstrated, applied and promoted to varying degrees.

[0003] Since battery swapping has the advantages of being fast, safe, and efficient, ship battery swapping operations have become one of the hot topics in the industry. However, the design and construction of existing ships are highly customized, and usually different power systems with different architectures are configured according to the requirements of the ship type and propulsion system. Therefore, the battery swapping efficiency of ships based on multiple new energy access is low. Utility Model Content

[0004] The utility model provides a power exchange system to improve the power exchange efficiency of a ship with multi-energy access.

[0005] According to a power exchange system of the utility model, applied to a ship with multi-energy access, it includes a DC power distribution device, an AC power connection device and a DC power connection device;

[0006] The AC power connection device is integrated with at least one AC power interface for connecting to at least one AC power generation device; the DC power distribution device is connected to the AC power connection device;

[0007] The DC power connection device integrates at least one DC power interface for connecting to at least one DC power generation device; the DC power distribution device is connected to the DC power connection device;

[0008] The DC power distribution device comprises a DC bus, at least one first power converter and at least one second power converter, wherein the first power converter is connected between the AC power connection device and the DC bus, and the second power converter is connected between the DC power connection device and the DC bus; the first power converter is used to convert the AC power input by the AC power generation device into DC power matching the ship's electrical system;

[0009] The second power converter is used to convert the DC power input by the DC power generation device into DC power matching the ship's electrical system.

[0010] Optionally, the DC bus includes: a first busbar and a second busbar; the DC power distribution device also includes: a power supply end DC power distribution module;

[0011] An isolating switch and / or a DC circuit breaker is connected between the first busbar and the second busbar;

[0012] The input end of the DC power distribution module at the power supply end is connected to the first busbar and the second busbar respectively, and the output end of the DC power distribution module at the power supply end is connected to the ship motor and the ship load respectively.

[0013] Optionally, the first power converter comprises: a first power conversion unit, a second power conversion unit, a first filtering unit and a second filtering unit;

[0014] The first filter unit is connected between the AC power interface and the first power conversion unit, and the second filter unit is connected between the AC power interface and the second power conversion unit; the first power conversion unit is also connected to the first busbar, and the second power conversion unit is also connected to the second busbar;

[0015] Wherein, the first power conversion unit and the second power conversion unit both include AC-DC subunits.

[0016] Optionally, the first filtering unit and the second filtering unit both include a first filter.

[0017] Optionally, the second power converter includes: a third power conversion unit and a fourth power conversion unit;

[0018] The third power conversion unit is connected between one of the DC power interfaces and the first busbar, and the fourth power conversion unit is connected between one of the DC power interfaces and the second busbar;

[0019] Wherein, the third power conversion unit and the fourth power conversion unit both include a DC-DC sub-unit.

[0020] Optionally, the power supply end DC power distribution module includes at least one third power converter and at least one fourth power converter, the third power converter is connected between the DC bus and the ship motor, and the fourth power converter is connected between the DC bus and the ship load;

[0021] The third power converter comprises a fifth power conversion unit, a sixth power conversion unit, a third filter unit and a fourth filter unit, wherein the fifth power conversion unit is connected between the third filter unit and the first busbar, the sixth power conversion unit is connected between the fourth filter unit and the second busbar, the third filter unit is also connected to the first motor of the ship, and the fourth filter unit is also connected to the second motor of the ship;

[0022] The fourth power converter comprises a seventh power conversion unit, an eighth power conversion unit, a fifth filter unit and a sixth filter unit, wherein the seventh power conversion unit is connected between the fifth filter unit and the first busbar, the eighth power conversion unit is connected between the sixth filter unit and the second busbar, the fifth filter unit is also connected to a first load of the ship, and the sixth filter unit is also connected to a second load of the ship;

[0023] Among them, the fifth power conversion unit, the sixth power conversion unit, the seventh power conversion unit and the eighth power conversion unit all include a DC-AC sub-unit; the third filtering unit, the fourth filtering unit, the fifth filtering unit and the sixth filtering unit all include a second filter.

[0024] Optionally, the AC power connection device further integrates at least one first circuit breaker, the first circuit breaker is connected to the AC power interface in a one-to-one correspondence, and the first circuit breaker is connected between the AC power interface and the DC power distribution device;

[0025] The DC power connection device further integrates at least one second circuit breaker, the second circuit breaker is connected to the DC power interface in a one-to-one correspondence, and the second circuit breaker is connected between the DC power interface and the DC power distribution device.

[0026] Optionally, the AC power connection device is connected to the DC power distribution device via a first isolating switch, a first fuse and a third circuit breaker in sequence;

[0027] The DC power connection device is connected to the DC power distribution device via a second isolating switch, a second fuse and a fourth circuit breaker in sequence.

[0028] Optionally, the DC power distribution device further comprises an energy management module, and the energy management module is used to monitor and manage the use and distribution of various energy sources on the ship.

[0029] Optionally, the first busbar and the second busbar are connected to the input end of the DC distribution module at the power supply end through the fifth circuit breaker, the third fuse and the third isolating switch in sequence, and the output end of the DC distribution module at the power supply end is connected to the ship motor through the sixth circuit breaker, and is connected to the ship load through the seventh circuit breaker.

[0030] The technical solution provided by the embodiment of the utility model is to set an AC power connection device to integrate at least one AC power interface, so that the AC power connection device can be connected to at least one AC power generation device, and to set a DC power connection device to integrate at least one DC power interface, so that the DC power connection device can be connected to at least one DC power generation device, and at least one first power converter is connected to the AC power interface, and at least one second power converter is connected to the DC power interface, so that the AC power input by the AC power interface and the DC power input by the DC power interface can be converted into DC power matching the ship's electrical system, so that the power exchange system can be adapted to AC and / or DC power generation devices of various modules, and can realize the access of various energy power generation devices, realize the power exchange operation of the ship, and improve the operation efficiency of the ship. At the same time, due to the integration of unified AC power interface and DC power interface, it is possible to realize the rapid replacement of various energy power generation devices, and it can be used as a standard power system to adapt to various ship types, which can solve the problems of diversity, customization, high cost, etc. of ship power system, and realize intelligent manufacturing and reduce costs.

[0031] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic diagram of the structure of a power exchange system provided by an embodiment of the utility model;

[0034] Figure 2 A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0035] Figure 3 A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0036] Figure 4 A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0037] Figure 5 A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0038] Figure 6A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0039] Figure 7 A schematic diagram of the structure of another power exchange system provided by an embodiment of the utility model;

[0040] Figure 8 A schematic structural diagram of another battery replacement system provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] Figure 1 A schematic diagram of a battery replacement system provided by an embodiment of the utility model, referring to Figure 1The power exchange system is applied to ships with multi-energy access, including a DC distribution device 1, an AC connection device 2 and a DC connection device 3; the AC connection device 2 integrates at least one AC power interface 21 for connecting to at least one AC power generation device; the DC distribution device 1 is connected to the AC connection device 2; the DC connection device 3 integrates at least one DC power interface 31 for connecting to at least one DC power generation device; the DC distribution device 1 is connected to the DC connection device 3; the DC distribution device 1 includes a DC bus L, at least one first power converter 11 and at least one second power converter 12, the first power converter 11 is connected between the AC connection device 2 and the DC bus L, and the second power converter 12 is connected between the DC connection device 3 and the DC bus L; the first power converter 11 is used to convert the AC power input by the AC power generation device into DC power matching the ship's power system; the second power converter 12 is used to convert the DC power input by the DC power generation device into DC power matching the ship's power system.

[0044] Among them, the AC power interface can be a standardized circuit interface for connecting to an AC power generation device with the same standardized interface; the DC power interface can be a standardized circuit interface for connecting to a DC power generation device with the same standardized interface. Both the AC power generation device and the DC power connection device are modular power supply systems, usually with a standard container as a carrier for lifting, transportation and fixing. And the container is equipped with a power generation device and an auxiliary system serving the power generation device, a protection system to ensure the safety of the power generation device, and a power conversion device that converts electrical energy into a power that matches the platform system of the power exchange system. The AC power generation device and the DC power connection device can be used alternately or simultaneously, and can be connected to one or more, and can include power generation devices in various energy forms. For example, the AC power generation device can include a diesel generator, a dual-fuel generator or other low-carbon or clean energy generator, and the DC power generation device can include a lithium battery pack, a photovoltaic module or a hydrogen fuel cell. The DC bus L is used to transmit the DC power output by the first power converter 11 and the second power converter 12.

[0045] Specifically, when the ship needs to change power, at least one modular AC power generation device can be connected through the AC power interface 21 of the AC power connection device 2, and the AC power generation device outputs AC power to the first power converter 11, and then the first power converter 11 converts the AC power into DC power matching the ship's power system, and transmits it to the electrical equipment on the ship via the DC bus L; and / or, at least one modular DC power generation device can be connected through the DC power interface 31 of the DC power connection device 3, and the DC power generation device outputs DC power to the second power converter 12, and then the second power converter 12 converts the DC power into DC power matching the ship's power system, and transmits it to the electrical equipment on the ship via the DC bus L.

[0046] The technical solution provided by the embodiment of the utility model is to set an AC power connection device to integrate at least one AC power interface, so that the AC power connection device can be connected to at least one AC power generation device, and to set a DC power connection device to integrate at least one DC power interface, so that the DC power connection device can be connected to at least one DC power generation device, and at least one first power converter is connected to the AC power interface, and at least one second power converter is connected to the DC power interface, so that the AC power input by the AC power interface and the DC power input by the DC power interface can be converted into DC power matching the ship's electrical system, so that the power exchange system can be adapted to AC and / or DC power generation devices of various modules, and can realize the access of various energy power generation devices, realize the power exchange operation of the ship, and improve the operation efficiency of the ship. At the same time, due to the integration of unified AC power interface and DC power interface, it is possible to realize the rapid replacement of various energy power generation devices, and it can be used as a standard power system to adapt to various ship types, which can solve the problems of diversity, customization, high cost, etc. of ship power system, and realize intelligent manufacturing and reduce costs.

[0047] Optionally, the AC power interface and the DC power interface may be configured as pluggable power interfaces, which are used to adapt to power interfaces of different power generation devices by replacing the power interfaces when the power interfaces do not match the interfaces of the power generation devices.

[0048] Figure 2 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 2 On the basis of the above embodiment, the DC bus L includes a first busbar L1 and a second busbar L2; the DC power distribution device 3 also includes a power supply end DC power distribution module 13; an isolating switch and / or a DC circuit breaker is connected between the first busbar L1 and the second busbar L2; the input end of the power supply end DC power distribution module 13 is respectively connected to the first busbar L1 and the second busbar L2, and the output end of the power supply end DC power distribution module 13 is respectively connected to the ship motor M and the ship load R L connect.

[0049] The first busbar L1 and the second busbar L2 can be connected through an isolating switch and a DC circuit breaker. The number of isolating switches can be two, which are respectively arranged on the first busbar L1 and the second busbar L2. The isolating switch is used to cut off the physical connection between the first busbar L1 and the second busbar L2, so that they are in a disconnected state. The DC circuit breaker is used to control the connection or disconnection of the first busbar L1 and the second busbar L2, and can automatically disconnect the circuit under short circuit, overload or other fault conditions.

[0050] Optionally, the power exchange system further includes a transformer, which is connected to the DC power distribution module 13 at the power supply end and the ship load R LIt is used to realize the conversion and transmission of electric energy, reduce losses, and improve energy utilization efficiency. It can also provide isolation protection and voltage regulation to ensure the safe, stable and efficient operation of the power system.

[0051] Specifically, since the output end of the first power converter 11 is respectively connected to the first busbar L1 and the second busbar L2, and the output end of the second power converter 12 is respectively connected to the first busbar L1 and the second busbar L2, when power is supplied through any busbar, the input end of the power supply end DC distribution module 13 can normally input DC power, thereby ensuring that the ship motor M and the ship load R L Works fine.

[0052] The technical solution provided by the embodiment of the utility model can control the power supply mode of the busbar according to the power demand of the electrical load on the ship and save energy consumption by setting a first busbar and a second busbar, and connecting the first busbar and the second busbar through a DC circuit breaker and an isolating switch. At the same time, due to the connection through a DC circuit breaker, when one of the busbars fails, it can be quickly separated from the system, thereby avoiding the spread of the fault and affecting the entire system and protecting other equipment from damage. Or when one of the busbars needs to be maintained, the DC circuit breaker can be opened to isolate it from the system, while the other busbar can still continue to supply power to ensure the continuous operation of the system. Furthermore, by controlling the state of the DC circuit breaker, it is possible to switch and adjust different busbars to meet the needs of the system under different working conditions.

[0053] Figure 3 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 3 On the basis of the above embodiments, the first power converter 11 includes a first power conversion unit 111, a second power conversion unit 112, a first filtering unit 113 and a second filtering unit 114; the first filtering unit 113 is connected between an AC power interface 21 and the first power conversion unit 111, and the second filtering unit 114 is connected between an AC power interface 21 and the second power conversion unit 112; the first power conversion unit 111 is also connected to the first busbar L1, and the second power conversion unit 112 is also connected to the second busbar L2; wherein the first power conversion unit 111 and the second power conversion unit 112 both include AC-DC (Alternating Current to Direct Curren, alternating current to direct current) subunits.

[0054] Specifically, when the ship needs to change power and is connected to the AC power generation device through the AC power interface 21, the AC power generation device outputs AC power to the first filtering unit 113, and the first filtering unit 113 filters out the noise signal in the input AC power, so that the signal input to the first power conversion unit 111 is more stable. The first power conversion unit 111 converts the AC power filtered by the first filtering unit 113 into DC power matching the ship's power system, and inputs the DC power to the power supply end DC distribution module 13 through the first busbar L1, so that the ship motor M and the ship load R L It can work normally. And / or, the AC power generation device outputs AC power to the second filtering unit 114, and the second filtering unit 114 filters out the noise signal in the input AC power, so that the signal input to the second power conversion unit 112 is more stable. The second power conversion unit 112 converts the AC power filtered by the second filtering unit 114 into DC power matching the ship's electrical system, and inputs the DC power to the power supply end DC distribution module 13 through the second busbar L2, so that the ship motor M and the ship load R L It works fine.

[0055] The technical solution provided by the embodiment of the utility model is to set a first power conversion unit, a second power conversion unit, a first filter unit and a second filter unit. The first filter unit and the second filter unit can filter the AC power output by the AC power interface, and by filtering out the noise signal in the AC power, the stability of the output voltage can be guaranteed, thereby improving the power conversion efficiency of the first power conversion unit and the second power conversion unit, and reducing energy loss. In addition, the first power conversion unit is connected to the first busbar, and the second power conversion unit is connected to the second busbar, so that when power is supplied through any AC current interface, DC current passes through the first busbar and the second busbar, so that DC power can be guaranteed to supply power to the ship motor and the ship load through the DC distribution module at the power supply end, ensuring the continuity of power supply.

[0056] Optionally, continue to refer to Figure 3 , the first filtering unit 113 and the second filtering unit 114 both include a first filter.

[0057] The first filter is used to filter out noise signals in the AC power output by the AC power interface 21 .

[0058] Figure 4 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 4On the basis of the above embodiments, the second power converter 12 includes a third power conversion unit 121 and a fourth power conversion unit 122; the third power conversion unit 121 is connected between a DC power interface 31 and a first busbar L1, and the fourth power conversion unit 122 is connected between a DC power interface 31 and a second busbar L2; wherein the third power conversion unit 121 and the fourth power conversion unit 122 both include a DC-DC (Direct Current to Direct Current) subunit.

[0059] Specifically, when the ship needs to change power and is connected to the DC power generation device through the DC power interface 31, the DC power generation device outputs DC power to the third power conversion unit 121, and the third power conversion unit 121 converts the DC power into DC power matching the ship's power system, and inputs the DC power to the power supply end DC distribution module 13 through the first busbar L1, so that the ship motor M and the ship load R L And / or, when the ship needs to change power and is connected to the DC power generation device through the DC power interface 31, the DC power generation device outputs DC power to the fourth power conversion unit 122, and the fourth power conversion unit 122 converts the DC power into DC power matching the ship's power system, and inputs the DC power to the power supply end DC distribution module 13 through the first busbar L1, so that the ship motor M and the ship load R L It works fine.

[0060] The technical solution provided by the embodiment of the utility model can convert the DC power input by the DC power interface into DC power matching the ship's electrical system by setting a third power conversion unit and a fourth power conversion unit, thereby ensuring the normal operation of electrical equipment on the ship and improving the reliability of the ship.

[0061] Figure 5 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 5On the basis of the above embodiments, the power supply end DC power distribution module 13 includes at least one third power converter 131 and at least one fourth power converter 132, the third power converter 131 is connected between the DC bus L and the ship motor, and the fourth power converter 132 is connected between the DC bus L and the ship load; the third power converter 131 includes a fifth power conversion unit 141, a sixth power conversion unit 151, a third filter unit 161 and a fourth filter unit 171, the fifth power conversion unit 141 is connected between the third filter unit 161 and the first busbar L1, and the sixth power conversion unit 151 is connected between the third filter unit 161 and the first busbar L2. 51 is connected between the fourth filter unit 171 and the second busbar L2, the third filter unit 161 is also connected to the first motor M1 of the ship, and the fourth filter unit 171 is also connected to the second motor M2 of the ship; the fourth power converter 132 includes a seventh power conversion unit 142, an eighth power conversion unit 152, a fifth filter unit 162 and a sixth filter unit 172, the seventh power conversion unit 142 is connected between the fifth filter unit 162 and the first busbar L1, the eighth power conversion unit 152 is connected between the sixth filter unit 172 and the second busbar L2, and the fifth filter unit 162 is also connected to the first load R L1 , the sixth filter unit is also connected to the ship's second load R L2 ; Among them, the fifth power conversion unit 141, the sixth power conversion unit 151, the seventh power conversion unit 142 and the eighth power conversion unit 152 all include a DC-AC (Direct Current to Alternating Current) sub-unit; the third filter unit 161, the fourth filter unit 171, the fifth filter unit 162 and the sixth filter unit 172 all include a second filter.

[0062] Specifically, when it is necessary to supply power to the first motor M1 on the ship, the fifth power conversion unit 141 converts the DC power on the first busbar L1 into AC power, and inputs the AC power to the third filtering unit 161. The third filtering unit 161 filters out the noise signal in the input AC power, so that the power supply signal to the first motor M1 on the ship is more stable. L1 When supplying power, the seventh power conversion unit 142 converts the DC power on the first busbar L1 into AC power, and inputs the AC power to the fifth filtering unit 162. The fifth filtering unit 162 filters out the noise signal in the input AC power, so that the first load R L1The power supply signal for the second motor M2 on the ship is more stable. When it is necessary to power the second motor M2 on the ship, the sixth power conversion unit 151 converts the DC power on the second busbar L2 into AC power, and inputs the AC power to the fourth filter unit 171. The fourth filter unit 171 filters out the noise signal in the input AC power, making the power supply signal for the second motor M2 on the ship more stable. L2 When supplying power, the eighth power conversion unit 152 converts the DC power on the second busbar L2 into AC power, and inputs the AC power to the sixth filtering unit 172. The sixth filtering unit 172 filters out the noise signal in the input AC power, so that the second load R L2 The power supply signal is more stable.

[0063] The technical solution provided by the embodiment of the utility model can filter out the noise signal in the alternating current output by the power conversion power supply by setting a one-to-one correspondence between the power conversion unit and the filtering unit, thereby ensuring the normal operation of the electronic device and extending the service life of the electronic device.

[0064] Figure 6 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 6 On the basis of the above embodiments, the AC power connection device 2 further integrates at least one first circuit breaker 22, the first circuit breaker 22 is connected to the AC power interface 21 in a one-to-one correspondence, and the first circuit breaker 22 is connected between the AC power interface 21 and the DC power distribution device 1; the DC power connection device 3 further integrates at least one second circuit breaker 32, the second circuit breaker 32 is connected to the DC power interface 31 in a one-to-one correspondence, and the second circuit breaker 32 is connected between the DC power interface 31 and the DC power distribution device 1.

[0065] Optionally, the first power converter 11 includes an AC-DC subunit and a first filter, the first circuit breaker 22 is connected between an AC power interface 21 and the first filter, and the second power converter 12 includes a DC-DC subunit, and the second circuit breaker 32 is connected between a DC power interface 31 and the DC-DC subunit.

[0066] Specifically, when the AC power interface 21 is used to access the AC power generation device, the first circuit breaker 22 remains in an open state during the plugging and unplugging of the interface of the AC power generation device, and during the operation of the power system, the line from the AC power interface to the DC power distribution device 1 is protected from overload and short circuit. When the DC power interface 31 is used to access the DC power generation device, the second circuit breaker 32 remains in an open state during the plugging and unplugging of the interface of the DC power generation device, and during the operation of the power system, the line from the DC power interface to the DC power distribution device 1 is protected from overload and short circuit.

[0067] The technical solution provided by the embodiment of the utility model, by setting a first circuit breaker and a second circuit breaker, when the current flowing through the circuit exceeds the rated current capacity of the circuit breaker, the circuit breaker will automatically trip and cut off the circuit to prevent the wires and equipment from overheating, being damaged or even causing a fire due to overload.

[0068] Figure 7 A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 7 On the basis of the above embodiments, the AC power connection device 2 is connected to the DC power distribution device through the first isolating switch Q1E, the first fuse FU1 and the third circuit breaker Q2E in sequence; the DC power connection device 3 is connected to the DC power distribution device through the second isolating switch Q3E, the second fuse FU2 and the fourth circuit breaker Q4E in sequence.

[0069] Among them, a fuse refers to an electrical appliance that uses the heat generated by itself to melt the fuse and thus disconnect the circuit when the current exceeds the specified value.

[0070] Specifically, when the AC power interface 21 is used to access the AC generator, under normal circumstances, the AC current output by the AC generator will not exceed the rated current capacity of the fuse and the circuit breaker, so the first isolating switch Q1E and the third circuit breaker Q2E are in a closed state, the first fuse FU1 works normally, and then the output AC current of the AC generator can flow through the first isolating switch Q1E, the first fuse FU1 and the third circuit breaker Q2E into the DC bus L for power supply. When the current in the loop is too large or a short circuit fault occurs, the first fuse FU1 melts and the third circuit breaker Q2E opens to prevent overcurrent from damaging electrical equipment and circuits.

[0071] When the DC power interface 31 is used to access the DC generator, under normal circumstances, the DC current output by the DC generator will not exceed the rated current capacity of the fuse and the circuit breaker, so the second isolating switch Q3E and the fourth circuit breaker Q4E are in a closed state, the second fuse FU2 works normally, and then the output DC current of the DC generator can flow through the second isolating switch Q3E, the second fuse FU2 and the fourth circuit breaker Q4E into the DC bus L for power supply. When the current in the loop is too large or a short circuit fault occurs, the second fuse FU2 melts and the fourth circuit breaker Q4E is disconnected to prevent overcurrent from damaging electrical equipment and circuits.

[0072] The technical solution provided by the embodiment of the utility model, by setting corresponding isolating switches, fuses and circuit breakers, enables the fuses and circuit breakers to cut off the circuit in time when a fault occurs in the circuit, thereby protecting the electrical system and equipment.

[0073] Figure 8A schematic diagram of another battery replacement system provided by an embodiment of the utility model, referring to Figure 8 On the basis of the above embodiments, the DC power distribution device 1 further includes an energy management module 14, which is used to monitor and manage the use and distribution of various energy sources on the ship.

[0074] Among them, the energy management module 14 may include a generator control and protection module, a hydrogen fuel cell management module, a lithium battery management module, an integrated management module, etc.

[0075] Specifically, when the ship is connected to the AC power generation device and the DC power generation device at the same time, the energy management module 14 can control the parallel connection and disconnection of the generator according to the rated power of the electrical equipment on the ship, so as to ensure the normal power supply of the electrical equipment on the ship and save energy. Since the energy management module 14 includes a hydrogen fuel cell management module and a lithium battery management module, when generating electricity through hydrogen fuel cells and lithium batteries, the energy management module 14 can monitor the voltage, current, temperature and capacity of the hydrogen fuel cells and lithium batteries in real time, and feed back the monitoring results to the control system or the user. By timely understanding the working status of the battery, problems such as over-discharge can be avoided. At the same time, the comprehensive management module can control the use and distribution of multiple energy sources input according to the actual needs of the ship. By setting up the energy management module, safe and optimized scheduling of energy can be achieved.

[0076] Optionally, continue to refer to Figure 8 The first busbar L1 and the second busbar L2 are connected to the input end of the DC distribution module at the power supply end through the fifth circuit breaker Q5E, the third fuse FU3 and the third isolating switch Q6E in sequence, and the output end of the DC distribution module at the power supply end is connected to the ship motor through the sixth circuit breaker Q7E, and is connected to the ship load through the seventh circuit breaker Q8E.

[0077] Optionally, the third power converter 131 and the fourth power converter 132 both include a DC-AC subunit and a second filter, the first busbar L1 and the second busbar L2 are connected to the DC-AC subunit through the fifth circuit breaker Q5E, the third fuse FU3 and the third isolating switch Q6E in sequence, the second filter is connected to the first motor M1 of the ship through the sixth circuit breaker Q7E, and is connected to the second motor M2 of the ship through the sixth circuit breaker Q7E, and is connected to the first load R of the ship through the seventh circuit breaker Q8E. L1 , and connect the ship's second load R through the seventh circuit breaker Q8E L2 .

[0078] Specifically, under normal circumstances, the AC current on the first busbar L1 and the second busbar L2 will not exceed the rated current capacity of the fuse and the circuit breaker, so the fifth circuit breaker Q5E and the third disconnector Q6E are in a closed state, the third fuse FU3 works normally, and the DC current on the DC bus L can flow through the fifth circuit breaker Q5E, the third fuse FU3 and the third disconnector Q6E to supply power to the ship motor and the ship load respectively. When the current in the loop is too large or a short circuit fault occurs, the third fuse FU3 melts and the fifth circuit breaker Q5E is disconnected to prevent overcurrent from damaging electrical equipment and circuits.

[0079] The technical solution provided by the embodiment of the utility model, by setting corresponding isolating switches, fuses and circuit breakers, enables the fuses and circuit breakers to cut off the circuit in time when a fault occurs in the circuit, thereby protecting the electrical system and equipment.

[0080] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0081] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A power exchange system, applied to ships with multi-energy access, characterized in that: Including DC power distribution device, AC power connection device and DC power connection device; The AC power connection device is integrated with at least one AC power interface for connecting to at least one AC power generation device; the DC power distribution device is connected to the AC power connection device; The DC power connection device integrates at least one DC power interface for connecting to at least one DC power generation device; the DC power distribution device is connected to the DC power connection device; The DC power distribution device comprises a DC bus, at least one first power converter and at least one second power converter, wherein the first power converter is connected between the AC power connection device and the DC bus, and the second power converter is connected between the DC power connection device and the DC bus; the first power converter is used to convert the AC power input by the AC power generation device into DC power matching the ship's electrical system; The second power converter is used to convert the DC power input by the DC power generation device into DC power matching the ship's electrical system.

2. The battery replacement system according to claim 1, characterized in that: The DC bus includes: a first busbar and a second busbar; the DC power distribution device also includes: a power supply end DC power distribution module; An isolating switch and / or a DC circuit breaker is connected between the first busbar and the second busbar; The input end of the DC power distribution module at the power supply end is connected to the first busbar and the second busbar respectively, and the output end of the DC power distribution module at the power supply end is connected to the ship motor and the ship load respectively.

3. The battery replacement system according to claim 2, characterized in that: The first power converter comprises: a first power conversion unit, a second power conversion unit, a first filtering unit and a second filtering unit; The first filter unit is connected between the AC power interface and the first power conversion unit, and the second filter unit is connected between the AC power interface and the second power conversion unit; the first power conversion unit is also connected to the first busbar, and the second power conversion unit is also connected to the second busbar; Wherein, the first power conversion unit and the second power conversion unit both include AC-DC subunits.

4. The battery replacement system according to claim 3, characterized in that: The first filtering unit and the second filtering unit each include a first filter.

5. The battery replacement system according to claim 2, characterized in that: The second power converter comprises: a third power conversion unit and a fourth power conversion unit; The third power conversion unit is connected between one of the DC power interfaces and the first busbar, and the fourth power conversion unit is connected between one of the DC power interfaces and the second busbar; Wherein, the third power conversion unit and the fourth power conversion unit both include a DC-DC sub-unit.

6. The battery replacement system according to claim 2, characterized in that: The power supply end DC power distribution module includes at least one third power converter and at least one fourth power converter, the third power converter is connected between the DC bus and the ship motor, and the fourth power converter is connected between the DC bus and the ship load; The third power converter comprises a fifth power conversion unit, a sixth power conversion unit, a third filter unit and a fourth filter unit, wherein the fifth power conversion unit is connected between the third filter unit and the first busbar, the sixth power conversion unit is connected between the fourth filter unit and the second busbar, the third filter unit is also connected to the first motor of the ship, and the fourth filter unit is also connected to the second motor of the ship; The fourth power converter comprises a seventh power conversion unit, an eighth power conversion unit, a fifth filter unit and a sixth filter unit, wherein the seventh power conversion unit is connected between the fifth filter unit and the first busbar, the eighth power conversion unit is connected between the sixth filter unit and the second busbar, the fifth filter unit is also connected to a first load of the ship, and the sixth filter unit is also connected to a second load of the ship; Among them, the fifth power conversion unit, the sixth power conversion unit, the seventh power conversion unit and the eighth power conversion unit all include a DC-AC sub-unit; the third filtering unit, the fourth filtering unit, the fifth filtering unit and the sixth filtering unit all include a second filter.

7. The battery replacement system according to claim 1, characterized in that: The AC power connection device further integrates at least one first circuit breaker, the first circuit breaker is connected to the AC power interface in a one-to-one correspondence, and the first circuit breaker is connected between the AC power interface and the DC power distribution device; The DC power connection device further integrates at least one second circuit breaker, the second circuit breaker is connected to the DC power interface in a one-to-one correspondence, and the second circuit breaker is connected between the DC power interface and the DC power distribution device.

8. The battery replacement system according to claim 1, characterized in that: The AC power connection device is connected to the DC power distribution device via a first isolating switch, a first fuse and a third circuit breaker in sequence; The DC power connection device is connected to the DC power distribution device via a second isolating switch, a second fuse and a fourth circuit breaker in sequence.

9. The battery replacement system according to claim 2, characterized in that: The DC power distribution device also includes an energy management module, which is used to monitor and manage the use and distribution of various energy sources on the ship.

10. The battery replacement system according to claim 2, characterized in that: The first busbar and the second busbar are connected to the input end of the DC distribution module at the power supply end through the fifth circuit breaker, the third fuse and the third isolating switch in sequence, and the output end of the DC distribution module at the power supply end is connected to the ship motor through the sixth circuit breaker, and is connected to the ship load through the seventh circuit breaker.

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