Energy storage device and energy storage system of high-pressure direct-hanging energy storage valve

Abstract

The invention relates to an energy storage device and an energy storage system of a high-pressure direct-hanging energy storage valve. The energy storage device comprises a battery controller and at least one starting electric cabinet, the starting electric cabinet comprises a first power supply circuit and a second power supply circuit, and the battery controller is connected with the first power supply circuit and the second power supply circuit; and the starting electric cabinet is used for supplying power to the battery controller through the first power supply circuit and / or the second power supply circuit. The starting electric cabinet in the energy storage device comprises the two power supply circuits, when any one power supply circuit breaks down, the other power supply circuit in the starting electric cabinet can provide electric energy for the second bus, normal operation of the battery controller is guaranteed to a certain extent, and the operation stability of the battery controller is improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-pressure direct-mounted energy storage, and in particular to an energy storage device and an energy storage system of a high-pressure direct-mounted energy storage valve. Background Art

[0002] The new high-voltage direct current energy storage technology integrates the voltage source converter (VSC) valve with the DC energy storage valve. It has the advantages of high modularity, good economic benefits, and high operational reliability, and is widely used in various power technology fields. The new high-voltage direct-mounted energy storage system consists of multiple energy storage sub-modules connected in series to achieve large-scale, highly integrated, and efficient energy storage. Therefore, ensuring the safe and stable operation of each energy storage sub-module is of great significance to the reliable operation of the new high-voltage direct-mounted energy storage system.

[0003] However, whether each energy storage sub-module can operate safely and stably currently depends mainly on the power supply reliability of its internal control circuit, especially the black start power supply stability of the energy storage battery cabinet controller (Battery Module Controller, BMC). Therefore, how to improve the black start power supply stability of the BMC has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] Based on this, it is necessary to provide an energy storage device and a power supply system of a high-voltage direct-mounted energy storage valve that can improve the black start power supply stability of the BMC in order to address the above technical problems.

[0005] In a first aspect, the present application provides an energy storage device. The energy storage device comprises: a battery controller and at least one starting power cabinet, the starting power cabinet comprises a first power circuit and a second power circuit; the battery controller is connected to the first power circuit and the second power circuit respectively;

[0006] The starting power cabinet is used to supply power to the battery controller through the first power circuit and / or the second power circuit.

[0007] The energy storage device provided in the embodiment of the present application includes two power supply circuits in the starting electric cabinet. When any one of the power supply circuits fails, the other power supply circuit in the starting electric cabinet can still provide power to the battery controller. The function of the starting electric cabinet is to always supply power to the battery controller. Therefore, the design of the two power supply circuits guarantees the normal operation of the starting electric cabinet to a certain extent, and further guarantees the normal operation of the battery controller. In addition, if the energy storage device includes multiple starting electric cabinets, when any starting electric cabinet fails, other starting electric cabinets can be used to supply power to the battery controller, which can ensure the normal operation of the battery controller from another perspective and improve the operating stability of the battery controller to a certain extent.

[0008] In one embodiment, the starting electric cabinet further includes an electric cabinet controller, and the electric cabinet controller is respectively connected to the first power circuit, the second power circuit and the battery controller;

[0009] The electric cabinet controller is used to transmit the electric energy output by the first power supply circuit and / or the second power supply circuit to the battery controller for power supply.

[0010] The energy storage device provided in the embodiment of the present application comprises a starting electric cabinet including an electric cabinet controller, and two power supplies are configured for the electric cabinet controller. When one of the power supplies fails due to a fault, the other power supply can supply power to the electric cabinet controller, thereby not affecting the normal operation of the electric cabinet controller. In addition, the electric cabinet controller is connected to a second bus, and a plurality of starting electric cabinets are connected in parallel to the second bus. When both the first power circuit and the second power circuit in any starting electric cabinet fail, other normally operating starting electric cabinets can provide power to the electric cabinet controller in the failed starting electric cabinet through the second bus, thereby not affecting the normal operation of the electric cabinet controller.

[0011] In one embodiment, the starting power cabinet further includes a first switch circuit; the first switch circuit is connected to the power cabinet controller and the battery controller respectively;

[0012] The first switch circuit is used to connect the path between the electric cabinet controller and the battery controller.

[0013] The energy storage device provided in the embodiment of the present application includes a first switch circuit in the starting electric cabinet, through which the first switch circuit can automatically close to provide stable power to the cabinet controller in the starting electric cabinet when a power failure occurs in the starting electric cabinet; in addition, the battery controller can also manage each starting electric cabinet by controlling the first switch circuit, so that each starting electric cabinet can continuously and stably provide power to the battery controller, thereby improving the operating stability of the battery controller to a certain extent, and then improving the operating stability of the energy storage device.

[0014] In one embodiment, the first power circuit includes a first bus power supply and a first cabinet power supply, the first bus power supply is connected to the first cabinet power supply, and the first cabinet power supply is also connected to the cabinet controller;

[0015] The first bus power supply is used to provide electrical energy to the first electrical cabinet power supply.

[0016] The storage device provided in the embodiment of the present application can introduce electric energy into the first electric cabinet power supply and the second electric cabinet power supply in the starting electric cabinet respectively through the first bus power supply and the access circuit, so that the first electric cabinet power supply and the second electric cabinet power supply can obtain electric energy through different access methods, and can prevent to a certain extent that when the first bus power supply or the access circuit fails, one of the first electric cabinet power supply and the second electric cabinet power supply can supply power normally, thereby improving the stability of the operation of the electric cabinet controller connected to the electric cabinet power supply.

[0017] In one embodiment, the second power supply circuit includes an access circuit and a second electric cabinet power supply, the access circuit is connected to the second electric cabinet power supply; the second electric cabinet power supply is also connected to the electric cabinet controller;

[0018] The access circuit is used to provide electrical energy to the second electrical cabinet power supply.

[0019] The storage device provided in the embodiment of the present application can pre-charge the energy storage unit through the access circuit, and then the energy storage unit provides electrical energy to the connected second electric cabinet power supply, so that the energy storage unit can continuously supply power to the second electric cabinet power supply, which can improve the operating stability of the electric cabinet controller connected to the second electric cabinet power supply to a certain extent.

[0020] In one embodiment, the access circuit includes: a resistor and an energy storage unit, wherein the resistor is connected in series with the energy storage unit; a common end of the resistor and the energy storage unit is connected to a positive input end of the second electric cabinet power supply; and the other end of the energy storage unit is connected to a negative input end of the second electric cabinet power supply;

[0021] The energy storage unit is used to couple external electric energy through the resistor for energy storage, and provide the electric energy to the second electric cabinet power supply.

[0022] The storage device provided in the embodiment of the present application can pre-charge the energy storage unit through the access circuit, and then the energy storage unit provides electrical energy to the connected second electric cabinet power supply, so that the energy storage unit can continuously supply power to the second electric cabinet power supply, which can improve the operating stability of the electric cabinet controller connected to the second electric cabinet power supply to a certain extent.

[0023] In one of the embodiments, the second power supply circuit further includes: a one-way switch, the one-way switch being connected to the second electric cabinet power supply and the electric cabinet controller respectively;

[0024] The one-way switch is used to connect the second electric cabinet power supply and the electric cabinet controller.

[0025] In the storage device provided in the embodiment of the present application, since the one-way switch can only allow the second cabinet power supply to transmit power to the cabinet controller in one direction, the safety of using the second cabinet power supply can be improved to a certain extent by setting the one-way switch.

[0026] In one of the embodiments, the energy storage device further includes a second switch circuit, and the second switch circuit is connected to the battery controller and the electric cabinet controller respectively;

[0027] The second switch circuit is used to open the path between the battery controller and the electric cabinet controller before the battery controller is started or when the battery controller is in an abnormal power supply state.

[0028] The battery controller described in the embodiment of the present application is provided with two redundant power supply interfaces, namely a first interface and a second interface. The battery controller can detect the voltage status of the two power supply interfaces in real time. When one power supply is abnormal, the battery controller can control the power supply system to switch to the second power supply, so that the power supply is uninterrupted during the power switching process, and the battery controller operates normally without power failure. When any power supply circuit fails, it is also possible to switch to a different power supply circuit without affecting the normal operation of the battery controller, thereby improving the operating stability of the battery controller to a certain extent.

[0029] In one of the embodiments, the battery controller is further used to control the second switch circuit to disconnect the path between the battery controller and the electric cabinet controller when the battery controller is in a normal power supply state.

[0030] In one of the embodiments, the energy storage device includes a plurality of starting power cabinets, and the battery controller is used to determine a target starting power cabinet from the plurality of starting power cabinets and to open a path between the target starting power cabinet and the battery controller.

[0031] The storage device provided in the embodiment of the present application can be used by a battery controller to uniformly coordinate and control the first switch circuit in each starting power cabinet to select a stable target starting power cabinet from multiple starting power cabinets to power the battery controller, thereby improving the operating stability of the battery controller.

[0032] In one embodiment, the energy storage device further includes a third power supply circuit; the third power supply circuit is connected to the first bus power supply and the battery controller respectively;

[0033] The third power supply circuit is used to obtain electrical energy from the first bus power supply to power the battery controller after the battery controller is started.

[0034] In one embodiment, the third power supply circuit includes a second bus power supply, a first switch and a second switch; the second bus power supply is connected to the first switch; the first switch is also connected to the battery controller, the second switch is connected to the first bus power supply, and the second switch is also connected to the battery controller;

[0035] The first switch is used to conduct the path between the second bus power supply and the battery controller after the battery controller is started; the second switch is used to conduct the path between the first bus power supply and the battery controller after the battery controller is started.

[0036] In one embodiment, the third power supply circuit further includes a redundancy module; the redundancy module is respectively connected to the first switch, the second switch and the battery controller;

[0037] The redundancy module is used to control the second switch to connect the path between the first bus power supply and the battery controller after the battery controller is started, and to control the first switch to connect the path between the second bus power supply and the battery controller when a failure of the first bus power supply is detected.

[0038] The energy storage device provided in the embodiment of the present application includes two bus power supplies, and when any one of the bus power supplies fails, the redundancy module can control the use of the other bus power supply to provide power to the battery controller, so the design of the two bus power supplies ensures the normal operation of the battery controller to a certain extent.

[0039] In one embodiment, the energy storage device further includes a first bus and a second bus, the input ends of the first power circuit and the second power circuit are both connected to the first bus, and the output ends of the first power circuit and the second power circuit are connected to the battery controller through the second bus;

[0040] The first power supply circuit and the second power supply circuit are used to obtain electric energy from the first bus for storage, and transmit the stored electric energy to the battery controller through the second bus.

[0041] In a second aspect, the present application also provides an energy storage system of a high-pressure direct-mounted energy storage valve. The energy storage system comprises a control device and at least one energy storage device as described in the first aspect;

[0042] The control device is used to control the start-up of the energy storage device.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 is a schematic structural diagram of an energy storage device in one embodiment;

[0046] Figure 2 is a schematic structural diagram of an energy storage device in another embodiment;

[0047] Figure 3 is a schematic structural diagram of an energy storage device in another embodiment;

[0048] Figure 4 is a schematic structural diagram of an energy storage device in another embodiment;

[0049] Figure 5 is a schematic structural diagram of an energy storage device in another embodiment;

[0050] Figure 6 is a schematic structural diagram of an energy storage device in another embodiment;

[0051] Figure 7 is a schematic structural diagram of an energy storage device in another embodiment;

[0052] Figure 8 is a schematic structural diagram of an energy storage device in another embodiment;

[0053] Fig. 9 is a schematic structural diagram of an energy storage device in another embodiment;

[0054] Fig.10 A schematic diagram of the structure of an energy storage device in another embodiment

[0055] Fig.11 is a schematic structural diagram of an energy storage system in one embodiment;

[0056] Reference numerals

[0057] Energy storage device 1, battery controller 10, starter cabinet 11;

[0058] A first bus 12, a second bus 13, a first power circuit 111;

[0059] A second power supply circuit 112, a cabinet controller 113, and a first switch circuit 114;

[0060] A first bus power supply 1111, a first electric cabinet power supply 1112, and an access circuit 1121;

[0061] A second electric cabinet power supply 1122, a one-way switch 1123, and a second switch circuit 14;

[0062] A first interface 101, a second interface 102, and a third power supply circuit 15;

[0063] A second bus power supply 153, a first switch 151, a second switch 152;

[0064] The redundancy module 154 controls the device 2 . DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] At present, the new high-voltage direct current energy storage technology integrates the voltage source converter (VSC) converter valve with the DC energy storage valve, which has the advantages of high modularity, good economic benefits, and high operational reliability, and is widely used in various fields of power technology. The new high-voltage direct-mounted energy storage system is composed of multiple energy storage submodules in series to achieve large-scale, highly integrated, and efficient energy storage. The core component of the new high-voltage direct-mounted energy storage system is also an energy storage valve submodule that integrates a power module and a battery module, so ensuring the safe and stable operation of the energy storage valve submodule is of great significance to the high reliability of the energy storage valve and the energy storage power station. Among them, the control circuit inside the energy storage valve submodule is powered by the battery cabinet of the energy storage valve submodule, and no power is taken from the external power grid system. Therefore, the energy storage valve submodule needs to have a black start function when it is powered on, and the premise of ensuring the reliability of the black start function is to ensure the reliability of the power supply of the energy storage battery cabinet controller (Battery Module Controller, BMC). Therefore, the embodiment of the present application provides an energy storage device that can improve the black start power supply stability of the energy storage valve submodule and the BMC power supply stability to a certain extent. The following embodiments will explain in detail the energy storage device and the power supply system of the high-voltage direct-mounted energy storage valve described in the embodiments of the present application.

[0070] In one embodiment, Figure 1 The embodiment is an energy storage device 1, which includes: a battery controller 10 and at least one starting power cabinet 11, the starting power cabinet 11 includes a first power circuit 111 and a second power circuit 112; the battery controller 10 is connected to the first power circuit 111 and the second power circuit 112 respectively; the starting power cabinet 11 is used to power the battery controller through the first power circuit 111 and / or the second power circuit 112.

[0071] The energy storage device 1 may be a type of energy storage valve submodule, and the battery controller 10 may be a power board BMC of the energy storage valve submodule, on which redundant power interfaces are provided. The power board BMC is designed with a buffer circuit, which internally detects the voltage status of each power interface in real time. When the voltage status of any power interface is abnormal, it can switch to the power supply circuit of other power interfaces to obtain electrical energy. The energy storage device 1 may include at least one starting electrical cabinet 11, for example, Figure 1 The system includes n starting cabinets, and the n starting cabinets are connected in parallel.

[0072] The starting power cabinet 11 can be specifically a black start power supply circuit of the BMC, and the black start power supply circuit can be integrated in the power cabinet, which can provide power to the BMC before the BMC is powered on, and can also be used as a switchable power supply circuit to provide power to the BMC when a power supply abnormality occurs during the normal operation of the BMC. The starting power cabinet 11 is connected to a power interface on the power board of the BMC.

[0073] The first power circuit 111 can be used as a main power supply for the battery controller 10, and the second power circuit 112 can be used as a backup power supply for the battery controller 10; or the second power circuit 112 can be used as a main power supply for the battery controller 10, and the first power circuit 111 can be used as a backup power supply for the battery controller 10. The main-backup relationship between the first power circuit 111 and the second power circuit 112 can be determined in advance according to actual circuit design requirements.

[0074] In the embodiment of the present application, before the battery controller 10 is powered on, any one or all of the starting electric cabinets 11 can provide power to the battery controller 10 to achieve a black start of the battery controller 10; after the battery controller 10 is powered on normally, the starting electric cabinet 11 can switch to another power supply circuit to supply power to the battery controller 10 to achieve normal operation of the battery controller 10. When the battery controller 10 has a power supply abnormality during operation, it can switch from the current abnormal power supply circuit to any one or all of the starting electric cabinets 11, so that the starting electric cabinet 11 can provide power to the battery controller 10 under abnormal power supply conditions.

[0075] The energy storage device provided in the embodiment of the present application includes two power supply circuits in the starting electric cabinet. When any one of the power supply circuits fails, the other power supply circuit in the starting electric cabinet can still provide power to the battery controller. The function of the starting electric cabinet is to always supply power to the battery controller. Therefore, the design of the two power supply circuits guarantees the normal operation of the starting electric cabinet to a certain extent, and further guarantees the normal operation of the battery controller. In addition, if the energy storage device includes multiple starting electric cabinets, when any starting electric cabinet fails, other starting electric cabinets can be used to supply power to the battery controller, which can ensure the normal operation of the battery controller from another perspective and improve the operating stability of the battery controller to a certain extent.

[0076] In one embodiment, Figure 1The energy storage device 1 described in the embodiment also includes: a first bus 12 and a second bus 13, the input end of the first power circuit 111 and the input end of the second power circuit 112 are both connected to the first bus 12; the output end of the first power circuit 111 and the output end of the second power circuit 112 are both connected to the battery controller 10 through the second bus 13; the first power circuit 111 and the second power circuit 112 are used to obtain electrical energy from the first bus 12 for storage, and transmit the stored electrical energy to the battery controller 10 through the second bus 13.

[0077] The electric energy on the first bus 12 comes from an external power supply or an external power system, which can provide electric energy to the starting cabinet 11. There is always electric energy on the second bus 13, and the electric energy comes from the first power circuit 111, or the second power circuit 112, or the first power circuit 111 and the second power circuit 112 in the starting cabinet 11, so the second bus 13 can also be called a cabinet power supply bus. The starting cabinet is connected to a power interface on the power board of the BMC through the second bus 13. The energy storage device 1 may include multiple starting cabinets 11, for example, Figure 1 The system includes n starting cabinets, and the n starting cabinets are connected in parallel between the first bus 12 and the third bus 13 .

[0078] The first power supply circuit 111 can be used as a main power supply for supplying power to the second bus 13, and the second power supply circuit 112 can be used as a backup power supply for supplying power to the second bus 13; or the second power supply circuit 112 can be used as a main power supply for supplying power to the second bus 13, and the first power supply circuit 111 can be used as a backup power supply for supplying power to the second bus 13. The main-backup relationship between the first power supply circuit 111 and the second power supply circuit 112 can be determined in advance according to actual circuit design requirements.

[0079] In the embodiment of the present application, before the battery controller 10 is powered on, any starting electric cabinet 11 or all starting electric cabinets 11 can provide electric energy to the battery controller 10 through the second bus 13 to achieve a black start of the battery controller 10; when the battery controller 10 is powered on normally, the starting electric cabinet 11 can switch to another power supply circuit to supply power to the battery controller 10 to achieve normal operation of the battery controller 10. When the battery controller 10 has a power supply abnormality during operation, it can switch from the current abnormal power supply circuit to any starting electric cabinet 11 or all starting electric cabinets 11, so that the starting electric cabinet 11 can provide electric energy for the battery controller 10 under abnormal power supply conditions.

[0080] The energy storage device provided in the embodiment of the present application includes two power supply circuits in the starting electric cabinet. When any one of the power supply circuits fails, the other power supply circuit in the starting electric cabinet can still provide power to the second bus. The function of the starting electric cabinet is to always have power on the second bus. Therefore, the design of the two power supply circuits guarantees the normal operation of the starting electric cabinet to a certain extent, and further guarantees the normal operation of the battery controller. In addition, the energy storage device may include multiple starting electric cabinets, which are connected in parallel between the first bus and the second bus. When any starting electric cabinet fails, other starting electric cabinets can be used to supply power to the battery controller through the second bus. From another perspective, the normal operation of the battery controller can be guaranteed, and the operating stability of the battery controller can be improved to a certain extent.

[0081] In one embodiment, Figure 2 As shown (Description: Figure 2 This is only an example of the structure of an energy storage device, and the starting cabinet in the energy storage device described in other embodiments is also applicable). Figure 1 The starting power cabinet 11 also includes a power cabinet controller 113, which is connected to the first power circuit 111 and the battery controller 10 respectively; the power cabinet controller 113 is used to transmit the electric energy output by the first power circuit 111 and / or the second power circuit 112 to the battery controller 113 for power supply.

[0082] Among them, the output end of the first power supply circuit 111 and the output end of the second power supply circuit 112 are both connected to the electric cabinet controller 113, and one end of the electric cabinet controller 113 is connected to the battery controller 10 through the second bus 13; the electric cabinet controller 113 in each starting electric cabinet 11 is used to manage the first power supply circuit 111 and the second power supply circuit 112 to control the transmission of the electric energy of the first power supply circuit 111 to the battery controller 10 for power supply, or the transmission of the electric energy of the second power supply circuit 112 to the battery controller 10 for power supply, or the transmission of the electric energy of the first power supply circuit 111 and the second power supply circuit 112 to the battery controller 10 for power supply.

[0083] In an embodiment of the present application, before the battery controller 10 is powered on, the cabinet controller 113 in the starting cabinet 11 can transmit the electric energy output by the second power circuit 112 to the battery controller 10 when the first power circuit 111 fails; optionally, the cabinet controller 113 can also transmit the electric energy output by the first power circuit 111 to the battery controller 10 for power supply when the second power circuit 112 fails; optionally, the electric energy output by the second power circuit 112 can be transmitted to the second bus 13, thereby transmitting the electric energy on the second bus 12 to the battery controller 10 for power supply; optionally, when the energy storage device includes multiple starting cabinets, the cabinet controller 113 in one of the starting cabinets 11 can also obtain the electric energy provided by other starting cabinets 11 from the second bus 13 when both the first power circuit 111 and the second power circuit 112 fail, so as to ensure the normal operation of the cabinet controller 113 in the starting cabinet 11.

[0084] The energy storage device provided in the embodiment of the present application comprises a starting electric cabinet including an electric cabinet controller, and two power supplies are configured for the electric cabinet controller. When one of the power supplies fails due to a fault, the other power supply can supply power to the electric cabinet controller, thereby not affecting the normal operation of the electric cabinet controller. In addition, the electric cabinet controller is connected to a second bus, and a plurality of starting electric cabinets are connected in parallel to the second bus. When both the first power circuit and the second power circuit in any starting electric cabinet fail, other normally operating starting electric cabinets can provide power to the electric cabinet controller in the failed starting electric cabinet through the second bus, thereby not affecting the normal operation of the electric cabinet controller.

[0085] In one embodiment, Figure 3 As shown (Description: Figure 3 This is only an example of the structure of an energy storage device, and the starting cabinet in the energy storage device described in other embodiments is also applicable). Figure 2 The starting electric cabinet 11 also includes a first switch circuit 114; the first switch circuit 114 is connected to the electric cabinet controller 113 and the battery controller 10 respectively; the first switch circuit 114 is used to connect the path between the electric cabinet controller 113 and the battery controller 10.

[0086] Among them, one end of the electric cabinet controller 113 is connected to one end of the first switch circuit 111, and the other end of the first switch circuit 114 is connected to the battery controller 10. When the starting electric cabinet 11 and the battery controller 10 transmit electric energy through the second bus 13, the other end of the first switch circuit 114 is connected to the second bus 13; the first switch circuit 114 can be a relay or other types of switch circuits. When the first switch circuit 114 is a relay, the normally closed contact in the relay connects the electric cabinet controller 113 and the battery controller 10. The first switch circuit 114 can be automatically closed when the starting electric cabinet 11 is not started or the power supply in the starting electric cabinet 11 fails to connect the passage between the electric cabinet controller 113 and the battery controller 10; the first switch circuit 114 can also be controlled by the battery controller 10 to close or disconnect during the operation of the battery controller 10, so that the starting electric cabinet 11 can supply power to the battery controller 10 when the battery controller 10 needs to be powered, and disconnect the passage between the battery controller 10 and the starting electric cabinet 11 when the battery controller 10 does not need to use the starting electric cabinet 11 to power the battery.

[0087] In the embodiment of the present application, when the battery controller 10 is not started, the first switch circuit 114 remains closed, that is, the passage between the starting electric cabinet 11 and the battery controller 10 is connected, so that the starting electric cabinet 11 can power the battery controller 10, and the battery controller 10 starts to self-start. When the battery controller 10 is started, the battery controller 10 monitors in real time whether the power supply interface on the battery controller 10 is in a normal power supply state. If it is in a normal power supply state, the battery controller 10 can control the first switch circuit 114 to disconnect the passage between the starting electric cabinet 11 and the electric cabinet controller 113. At this time, the battery controller 10 can use other power supply circuits to supply power, and the black start of the battery controller 10 ends.

[0088] Optionally, when the first switch circuit 114 in the energy storage device 1 is respectively connected to the electric cabinet controller 113 and the second bus 13, when the battery controller 10 is not started, the first switch circuit 114 remains closed, that is, the passage between the second bus 13 and the battery controller 10 is connected, so that the second bus 13 can power the battery controller 10, and the battery controller 10 starts to self-start. After the battery controller 10 is started, the battery controller 10 monitors in real time whether the power supply interface on the battery controller 10 is in a normal power supply state. If it is in a normal power supply state, the battery controller 10 can control the first switch circuit 114 to disconnect the passage between the second bus 13 and the electric cabinet controller 113. At this time, the battery controller 10 can be powered by other power supply circuits, and the black start of the battery controller 10 ends. After the black start of the battery controller 10 is completed, the battery controller 10 can also monitor the power supply status of each cabinet controller in each starting cabinet 11 in real time, and uniformly control the first switch circuit 114 in multiple starting cabinets 11, so that only one starting cabinet 11 supplies power to the second bus 13, ensuring that the second bus 13 has no competition for power supply, thereby ensuring the safety of the power supply line and the reliability of the bus power supply to a certain extent.

[0089] The energy storage device provided in the embodiment of the present application includes a first switch circuit in the starting electric cabinet, through which the first switch circuit can automatically close to provide stable power to the cabinet controller in the starting electric cabinet when a power failure occurs in the starting electric cabinet; in addition, the battery controller can also manage each starting electric cabinet by controlling the first switch circuit, so that each starting electric cabinet can continuously and stably provide power to the battery controller, thereby improving the operating stability of the battery controller to a certain extent, and then improving the operating stability of the energy storage device.

[0090] In one embodiment, Figure 4 As shown (Description: Figure 4 This is only an example of the structure of an energy storage device, and the first power supply circuit in the energy storage device described in other embodiments is also applicable). Figure 3 The first power supply circuit 111 includes a first bus power supply 1111 and a first cabinet power supply 1112. The first bus power supply 1111 is connected to the first cabinet power supply 1112, and the first cabinet power supply 1112 is also connected to the cabinet controller 113; the first bus power supply 1111 is used to provide electrical energy to the first cabinet power supply 1112.

[0091] Optionally, when the starting cabinet 11 in the energy storage device 1 obtains electric energy from the first bus 12 and supplies power to the battery controller 10 through the second bus 13, Figure 4The input end of the first bus power supply 1111 is connected to the first bus 12, the output end of the first bus power supply 1112 is connected to the input end of the first cabinet power supply 1112, and the output end of the first cabinet power supply 1111 is connected to the cabinet controller 113; the first bus power supply 1111 is used to obtain electric energy from the first bus 12 and provide electric energy to the first cabinet power supply 1111. The second power supply circuit 112 includes an access circuit 1121 and a second cabinet power supply 1122, the access circuit 1121 is connected to the second cabinet power supply 1122; the second cabinet power supply 1122 is also connected to the cabinet controller 113. Optionally, the input end of the access circuit 1121 can be connected to the first bus 12, and the output end of the access circuit 1121 can be connected to the input end of the second cabinet power supply 1122; the output end of the second cabinet power supply 1122 is connected to the cabinet controller 113; the access circuit 1121 is used to provide electric energy to the second cabinet power supply 1122, specifically, the electric energy on the first bus 12 can be stored, and the electric energy can be provided to the second cabinet power supply 1122. Optionally, the first bus power supplies 1111 in different starting cabinets 11 can be the same bus power supply or different bus power supplies.

[0092] In the embodiment of the present application, the first bus power supply 1111 can provide electric energy to the first electric cabinet power supply 1112, and the first electric cabinet power supply 1112 then transmits the electric energy to the battery controller 10 through the electric cabinet controller 113; optionally, the access circuit 1121 can provide electric energy to the second electric cabinet power supply 1122, and the second electric cabinet power supply 1122 then transmits the electric energy to the battery controller 10 through the electric cabinet controller 113. The battery controller 10 can obtain electric energy from the starting electric cabinet 11 when connected to the starting electric cabinet 11. The battery controller 10 can be connected to the starting electric cabinet 11 for power supply before starting. Optionally, the battery controller 10 can also be immediately connected to the starting electric cabinet 11 for power supply when the current power supply circuit fails.

[0093] Optionally, when the starting electric cabinet 11 in the energy storage device 1 obtains electric energy from the first bus 12 and supplies power to the battery controller 10 through the second bus 13, the first bus power supply 1111 can obtain electric energy from the first bus 12 and provide the electric energy to the first electric cabinet power supply 1112, and the first electric cabinet power supply 1112 then transmits the electric energy to the second bus 13 through the electric cabinet controller 113; Optionally, the access circuit 1121 can obtain electric energy from the first bus 12 and provide the electric energy to the second electric cabinet power supply 1122, and the second electric cabinet power supply 1122 then transmits the electric energy to the second bus 13 through the electric cabinet controller 113. The battery controller 10 can obtain electric energy from the second bus 13 for power supply when connected to the starting electric cabinet 11.

[0094] The storage device provided in the embodiment of the present application can introduce electric energy into the first electric cabinet power supply and the second electric cabinet power supply in the starting electric cabinet respectively through the first bus power supply and the access circuit, so that the first electric cabinet power supply and the second electric cabinet power supply can obtain electric energy through different access methods, and can prevent to a certain extent that when the first bus power supply or the access circuit fails, one of the first electric cabinet power supply and the second electric cabinet power supply can supply power normally, thereby improving the stability of the operation of the electric cabinet controller connected to the electric cabinet power supply.

[0095] In one embodiment, Figure 5 As shown (Description: Figure 5 This is only an example of the structure of an energy storage device, and the access circuits in the energy storage devices described in other embodiments are also applicable). Figure 4 The access circuit 1121 includes a resistor 1121_1 and an energy storage unit 1121_2, wherein the resistor 1121_1 and the energy storage unit 1121_2 are connected in series; the common end of the resistor 1121_1 and the energy storage unit 1121_2 is connected to the positive input end of the second cabinet power supply 1122; the other end of the energy storage unit 1121_2 is connected to the negative input end of the second cabinet power supply 1122; the energy storage unit 1121_2 is used to couple the external electric energy through the resistor 1121_1 for energy storage, and provide the electric energy to the second cabinet power supply 1122. For example, the energy storage unit 1121_2 can be used to couple the electric energy on the first bus 12 through the resistor 1121_1 for energy storage, and provide the electric energy to the second cabinet power supply 1122. It should be noted that Figure 5 The first bus power supply 1111 used in each starting power cabinet 11 is a bus power supply, which is only an example scenario.

[0096] Among them, the energy storage unit 1121_2 can be an electric cabinet, and the electric cabinet includes at least one battery pack. Optionally, when the access circuit 1121 is connected to the first bus 12, the access circuit 1121 also includes a first energy storage switch, a second energy storage switch, and a third energy storage switch, one end of the first energy storage switch is connected to the positive output end of the first bus 12 and the common end of one end of the second energy storage switch, the other end of the first energy storage switch is connected to the resistor 1121_1, one end of the second energy storage switch is connected to the positive output end of the first bus 12 and the common end of one end of the first energy storage switch, and the other end of the second energy storage switch is connected to the common end of the resistor 1121_1, the positive end of the energy storage unit, and the input end of the second electric cabinet power supply 1122; one end of the third energy storage switch is connected to the negative output end of the first bus 12, and the other end of the third energy storage switch is connected to the other input end of the second electric cabinet power supply 1122 and the common end of the negative end of the energy storage unit 1121_2.

[0097] In the embodiment of the present application, the access circuit 1121 can obtain electric energy from an external power source or the first bus 12, and couple the electric energy to the energy storage unit 1121_2 through the resistor 1121_1, and then the energy storage unit 1121_2 provides the electric energy to the second electric cabinet power supply 1122, and the second electric cabinet power supply 1122 can transmit the electric energy to the battery controller 10 through the electric cabinet controller 113 for power supply. Optionally, when the first energy storage switch, the second energy storage switch and the third energy storage switch in the access circuit 1121 are closed, the passage between the first bus 12 and the access circuit 10 is connected, and the first bus 12 can charge the energy storage unit 1121_2 in the access circuit 10; when the energy storage unit 1121_2 in the access circuit 10 is fully charged, the energy storage unit 1121_2 can output the electric energy to the starting electric cabinet 11 to provide electric energy to the second electric cabinet power supply 1122 in the starting electric cabinet 11. It should be noted that, in the process of the energy storage unit 1121_2 providing power to the second electric cabinet power supply 1122, the first energy storage switch, the second energy storage switch and the third energy storage switch can be in a disconnected state. The first energy storage switch, the second energy storage switch and the third energy storage switch can all be controlled by the battery controller 10, or by the electric cabinet controller 113, or by other controllers.

[0098] The storage device provided in the embodiment of the present application can pre-charge the energy storage unit through the access circuit, and then the energy storage unit provides electrical energy to the connected second electric cabinet power supply, so that the energy storage unit can continuously supply power to the second electric cabinet power supply, which can improve the operating stability of the electric cabinet controller connected to the second electric cabinet power supply to a certain extent.

[0099] In one embodiment, Figure 6 As shown (Description: Figure 6 This is only an example of the structure of an energy storage device, and the second power supply circuit in the energy storage device described in other embodiments is also applicable). Figure 5 The second power supply circuit 112 also includes: a one-way switch 1123, which is connected to the second electric cabinet power supply 1122 and the electric cabinet controller 113 respectively, and the one-way switch 1123 is used to connect the path between the second electric cabinet power supply 1122 and the electric cabinet controller 113.

[0100] One end of the one-way switch 1123 is connected to the output end of the second electric cabinet power supply 1122, and the other end of the one-way switch 1123 is connected to the electric cabinet controller 113; the one-way switch 1123 can be a diode ( Figure 6 When the second cabinet power supply 1122 transmits electric energy to the cabinet controller 113, the one-way switch 1123 connects the path between the second cabinet power supply 1122 and the cabinet controller 113, and disconnects the path from the cabinet controller 113 to the second cabinet power supply 1122.

[0101] In the embodiment of the present application, during the process of starting the electric cabinet 11 to work normally, the second electric cabinet power supply 1122 can transmit electric energy to the electric cabinet controller 113 through the one-way switch 1123, and then the electric cabinet controller 113 transmits the electric energy to the second bus 13 to supply power to the battery controller 10. In this process, since the one-way switch 1123 can only allow the second electric cabinet power supply 1122 to transmit electric energy to the electric cabinet controller 113 in one direction, the one-way switch 1123 can be provided to improve the safety of the use of the second electric cabinet power supply 1122 to a certain extent.

[0102] Figure 1-Figure 6 The storage device 1 described in the embodiment may include multiple starting power cabinets 11. In this case, the battery controller 113 is used to determine the target starting power cabinet from the multiple starting power cabinets 11 and to connect the path between the target starting power cabinet and the battery controller 10.

[0103] In the embodiment of the present application, when the battery controller 113 needs to be connected to the starting electric cabinet 11 for power supply, before connecting to the starting electric cabinet 11, the operating status of multiple starting electric cabinets 11 can be evaluated first, and the starting electric cabinet 11 in a good state can be determined, and the determined starting electric cabinet 11 can be used as the target starting electric cabinet, and then the path between the target starting electric cabinet and the battery controller 10 is connected, so that the target starting electric cabinet can supply power to the battery controller 10. Specifically, the battery controller 113 can select a stable target starting electric cabinet from multiple starting electric cabinets 11 to supply power to the battery controller 10 by uniformly coordinating and controlling the first switch circuit 114 in each starting electric cabinet 11, thereby improving the operating stability of the battery controller 10.

[0104] In one embodiment, Figure 7 As shown (Description: Figure 7 This is only an example of the structure of an energy storage device, and the energy storage devices described in other embodiments are also applicable). Figure 6 The energy storage device 1 also includes a second switch circuit 14, which is respectively connected to the battery controller 10 and the electric cabinet controller 113; the second switch circuit 14 is used to open the path between the battery controller 10 and the electric cabinet controller 113 before the battery controller 10 is started or when the battery controller 10 is in an abnormal power supply state.

[0105] Among them, when the starting electric cabinet 11 obtains electric energy from the first bus 12, and the starting electric cabinet 11 is connected to the battery controller 10 through the second bus 13, the first interface 101 of the battery controller 10 is connected to the second bus 13 through the second switch circuit 14; the second interface 102 of the battery controller 10 is connected to the first bus 12 through the first bus power supply 1111; the second switch circuit 14 is used to conduct the path between the battery controller 10 and the second bus 13 before the battery controller 10 is started, or when the second interface 102 is in an abnormal power supply state. The battery controller 10 is also used to control the second switch circuit 14 to disconnect the path between the battery controller 10 and the second bus 13 when the second interface 102 is in a normal power supply state. The second switch circuit 14 can be a relay or other types of switch circuits. When the second switch circuit 14 is a relay, the normally closed contact in the relay connects the second bus 13 and the battery controller 10.

[0106] In the embodiment of the present application, the second switch circuit 14 can automatically close the path between the starting electrical cabinet 11 and the battery controller 10 before the battery controller 10 is started, for example, automatically close the path between the second bus 13 and the battery controller 10, so that the electric energy on the second bus 13 can normally supply power to the battery controller 10, thereby realizing the black start of the battery controller 10. The battery controller 10 can also monitor the power supply status of the second interface 102 in real time. If the power supply status of the second interface 102 is in a normal power supply state, it means that the battery controller 10 is started normally. After that, the battery controller 10 can control the second switch circuit 14 to disconnect from the second bus 13, that is, use the electric energy provided by the first bus power supply 1111 to power the battery controller 10. When the battery controller 10 detects that the second interface 102 is in an abnormal power supply state, the battery controller 10 can control the second switch circuit 14 to connect to the second bus 13, that is, use the electric energy provided by the starting electrical cabinet 11 to power the battery controller 10.

[0107] The battery controller described in the embodiment of the present application is provided with two redundant power supply interfaces, namely a first interface and a second interface. The battery controller can detect the voltage status of the two power supply interfaces in real time. When one power supply is abnormal, the battery controller can control the power supply system to switch to the second power supply, so that the power supply is uninterrupted during the power switching process, and the battery controller operates normally without power failure. When any power supply circuit fails, it is also possible to switch to a different power supply circuit without affecting the normal operation of the battery controller, thereby improving the operating stability of the battery controller to a certain extent.

[0108] In one embodiment, Figure 8 As shown (Description: Figure 8 This is only an example of the structure of an energy storage device, and the energy storage devices described in other embodiments are also applicable). Figure 7The energy storage device 1 also includes a third power supply circuit 15; the third power supply circuit 15 is respectively connected to the first bus power supply 1111 and the battery controller 10; the third power supply circuit 15 is used to obtain electrical energy from the first bus power supply 1111 to power the battery controller 10 after the battery controller 10 is started.

[0109] Among them, the input end of the third power supply circuit 15 is connected to the output end of the first bus power supply 1111, and the output end of the third power supply circuit 15 is connected to the second interface 102 of the battery controller 10; the third power supply circuit 15 can be a switching circuit, used to connect or disconnect the path between the first bus power supply 1111 and the battery controller 10; optionally, the third power supply circuit 15 can also include a storage unit, which is also used to obtain electrical energy from the first bus power supply 1111 for storage, and when the battery controller 10 needs power supply, the stored electrical energy is transmitted to the battery controller 10 for power supply.

[0110] In the embodiment of the present application, the third power circuit 15 can connect the path between the first bus power supply 1111 and the battery controller 10 when the battery controller 10 is started, so that the electric energy on the first bus power supply 1111 can normally supply power to the battery controller 10, and realize the power supply of the battery controller 10 in the normal working state. Moreover, when the first bus power supply 1111 fails, the battery controller 10 can also disconnect the path between the battery controller 10 and the first bus power supply 1111 by controlling the third power circuit 15, thereby switching to another power supply circuit, that is, using the starting cabinet 11 for power supply, which does not affect the normal operation of the battery controller 10.

[0111] In one embodiment, Fig. 9 As shown (Description: Figure 8 This is only an example of the structure of an energy storage device, and the third power supply circuit described in other embodiments is also applicable). Figure 8 The third power supply circuit 15 includes a second bus power supply 153, a first switch 151 and a second switch 152; the second bus power supply 153 is connected to the first switch 151; the first switch 151 is also connected to the battery controller 10, the second switch 152 is connected to the first bus power supply 1111, and the second switch 152 is also connected to the battery controller 10; the first switch 151 is used to open the path between the second bus power supply 153 and the battery controller 10 after the battery controller 10 is started; the second switch 152 is used to open the path between the first bus power supply 1111 and the battery controller 10 after the battery controller 10 is started.

[0112] Among them, the input end of the second bus power supply 153 is connected to the third bus, and the output end of the second bus power supply 153 is connected to one end of the first switch 151; the other end of the first switch 151 is connected to the battery controller 10 through the second interface 102, one end of the second switch 152 is connected to the output end of the first bus power supply 1111, and the other end of the second switch 152 is connected to the battery controller 10 through the second interface 102; the first switch 151 can be a relay or other types of switches, which are used to connect or disconnect the path between the second bus power supply 153 and the battery controller 10; the second switch 152 can be a relay or other types of switches, which are used to connect or disconnect the path between the first bus power supply 1111 and the battery controller 10.

[0113] In the embodiment of the present application, when the battery controller 10 is powered on, the first switch 151 is closed, connecting the passage between the second bus power supply 153 and the battery controller 10, so that the second bus power supply 153 can supply power to the battery controller 10; optionally, when the battery controller 10 is powered on, the second switch 152 is closed, connecting the passage between the first bus power supply 1111 and the battery controller 10, so that the first bus power supply 1111 can supply power to the battery controller 10. It should be noted that when the battery controller 10 is powered on, whether the first bus power supply 1111 or the second bus power supply 153 is used can be determined in advance according to the actual circuit design requirements. In general, the first bus power supply 1111 serves as the main bus to provide electrical energy when the battery controller 10 is powered on.

[0114] Optional, Fig. 9 The third power supply circuit 15 also includes a redundant module 154; the redundant module 154 is respectively connected to the first switch 151, the second switch 152 and the battery controller 10; the redundant module 154 is used to control the second switch 152 to connect the path between the first bus power supply 1111 and the battery controller 10 after the battery controller 10 is started, and when a fault is detected in the first bus power supply 1111, control the first switch 151 to connect the path between the second bus power supply 16 and the battery controller 10.

[0115] In the embodiment of the present application, the redundancy module 154 can control the second switch 152 to close when the battery controller 10 is powered on, and connect the path between the first bus power supply 1111 and the battery controller 10, so that the first bus power supply 1111 can supply power to the battery controller 10. In this process, the redundancy module 154 can control the first switch 152 to open. The redundancy module 154 can also control the second switch 152 to open and control the first switch 151 to close when detecting that the first bus power supply fails, and connect the path between the second bus power supply 153 and the battery controller 10, so that the second bus power supply 153 replaces the first bus power supply 1111 to supply power to the battery controller 10, so that the battery controller 10 can be supplied with power uninterruptedly.

[0116] The energy storage device provided in the embodiment of the present application includes two bus power supplies, and when any one of the bus power supplies fails, the redundancy module can control the use of the other bus power supply to provide power to the battery controller, so the design of the two bus power supplies ensures the normal operation of the battery controller to a certain extent.

[0117] In one embodiment, Fig.10 As shown (Description: Fig.10 This is only an example of the structure of an energy storage device, and the energy storage devices described in other embodiments of the figures are also applicable). The above-mentioned energy storage device 1 also includes: a power module 17 and a third switch circuit 18. The third switch circuit 18 includes a third switch and a fourth switch, and the third switch is arranged on the positive bus of the first bus 12, and the fourth switch is arranged on the negative bus of the first bus 12. When the battery controller 10 is started, the third switch and the fourth switch can be controlled to close, so that the electric energy of the first bus 12 is provided to the first bus power supply 1111 for pre-charging, so that the first bus power supply 1111 can provide electric energy to the battery controller 10 for power supply, and the electric energy of the first bus 12 can also be provided to the access circuit 1121 for pre-charging at the same time, so that the electric energy on the first bus 12 can be provided to each starting cabinet for power supply through the access circuit 1121.

[0118] In the above Figure 1-Figure 10 Based on the storage device described in any embodiment, in one embodiment, a high-pressure direct-mounted energy storage valve energy storage system is also provided, such as Fig.11 As shown, the energy storage system includes a control device 2 and at least one storage device 1, wherein the control device 2 is used to control the energy storage device 1 to start. Specifically, the control device 2 can be connected to all switch circuits in the storage device 1, for example, Fig.10The switch in the third switching circuit 18 in the storage device shown, and the switch in the access circuit 1121, are used to connect the first bus and the path between the first bus power supply and the second bus power supply, thereby supplying power to the battery controller 10; optionally, the control device 2 can also be connected to the redundancy module 154, thereby controlling the redundancy module 154 to select any one bus power supply from the second bus power supply 153 and the first bus power supply 1111 to supply power to the battery controller 10.

[0119] The energy storage device and energy storage system described in any of the above embodiments have the following beneficial effects: first, two redundant power supply interfaces are configured on the power board where the battery controller is located, and the power board is designed with a buffer circuit. The battery controller can detect the voltage status of the two power supply interfaces in real time. When the first power supply is abnormal, the battery controller switches to the second power supply, and the black start power supply circuit is used. The power supply is uninterrupted during the power switching process, and the battery controller operates normally without power failure; the normal operation of the battery controller is not affected after any power supply fails; second, each starting power cabinet in the energy storage device is configured with two power supplies to supply power to the power cabinet controller in the starting power cabinet, one of which is powered by the main bus, and the other is powered by other power cabinets; the normal operation of the power cabinet controller is not affected after any power supply is disconnected; third, a second bus is established in the above energy storage device, that is, the power supply bus of the power cabinet controller, to realize the black start of the battery controller Dynamic power supply, if the power supply of any one of the multiple parallel starting cabinets is normal, it can ensure that the power supply bus of the cabinet controller is normal, and then ensure the normal black start power supply of the battery controller; fourth, the power supply bus of the cabinet controller can supply power to each cabinet controller, which can ensure that all cabinet controllers can still work normally after two cabinet power supplies in one or more cabinets fail at the same time; fifth, when the power supply of any cabinet in the above-mentioned energy storage device is normal, the cabinet power supply can supply power to the power supply bus of the cabinet controller; the bus is connected to the battery controller through the normally closed contact of the relay. When the battery controller is not started, the power supply bus supplies power to the power board of the battery controller; when the battery controller is started, it is detected that the first power supply of the power board of the battery controller is normal, then the battery controller controls the black start power supply relay coil to be energized, its normally closed contact is disconnected, and the battery controller completes the black start. Sixth, relays are configured between each starting switchgear and the power supply bus of the switchgear controller. The relays of each switchgear are centrally and coordinately controlled by the battery controller, and only one switchgear power supply is used to supply power to the power supply bus of the switchgear controller. This can ensure the safety of the power supply line and the reliability of the bus power supply to a certain extent.

[0120] The vehicle system described in the embodiment of the present application can be arranged in a compact layout in the vehicle, with each group of battery modules arranged in an independent cabinet in the center of the vehicle body, and can be quickly installed through modular lifting, thereby improving the efficiency of loading the battery modules on the locomotive; in addition, maintenance passages are reserved on both sides of the locomotive, and the converter cabinets are respectively arranged in front and behind the driver's cab, so that the overall layout is convenient for wiring, space utilization is high, and maintenance and inspection are convenient.

[0121] The scope of protection claimed in the above embodiments is not limited to the above specific implementation modes. Moreover, for those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

[0122] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises: a battery controller and at least one starting electric cabinet; the starting electric cabinet comprises a first power supply circuit and a second power supply circuit; the battery controller is connected to the first power supply circuit and the second power supply circuit respectively; The starting power cabinet is used to supply power to the battery controller through the first power circuit and / or the second power circuit.

2. The energy storage device according to claim 1, characterized in that: The starting electric cabinet further comprises an electric cabinet controller, and the electric cabinet controller is respectively connected to the first power supply circuit, the second power supply circuit and the battery controller; The electric cabinet controller is used to transmit the electric energy output by the first power supply circuit and / or the second power supply circuit to the battery controller for power supply.

3. The energy storage device according to claim 2, characterized in that: The starting electric cabinet further comprises a first switch circuit; the first switch circuit is connected to the electric cabinet controller and the battery controller respectively; The first switch circuit is used to connect the path between the electric cabinet controller and the battery controller.

4. The energy storage device according to claim 2 or 3, characterized in that: The first power supply circuit includes a first bus power supply and a first electric cabinet power supply, the first bus power supply is connected to the first electric cabinet power supply, and the first electric cabinet power supply is also connected to the electric cabinet controller; The first bus power supply is used to provide electrical energy to the first electrical cabinet power supply.

5. The energy storage device according to claim 2 or 3, characterized in that: The second power supply circuit includes an access circuit and a second electric cabinet power supply, the access circuit is connected to the second electric cabinet power supply; the second electric cabinet power supply is also connected to the electric cabinet controller; The access circuit is used to provide electrical energy to the second electrical cabinet power supply.

6. The energy storage device according to claim 5, characterized in that: The access circuit includes: a resistor and an energy storage unit, wherein the resistor is connected in series with the energy storage unit; a common end of the resistor and the energy storage unit is connected to a positive input end of the second electric cabinet power supply; and the other end of the energy storage unit is connected to a negative input end of the second electric cabinet power supply; The energy storage unit is used to couple external electric energy through the resistor for energy storage, and provide the electric energy to the second electric cabinet power supply.

7. The energy storage device according to claim 6, characterized in that: The second power supply circuit further includes: a one-way switch, the one-way switch being connected to the second electric cabinet power supply and the electric cabinet controller respectively; The one-way switch is used to connect the second electric cabinet power supply and the electric cabinet controller.

8. The energy storage device according to claim 4, characterized in that: The energy storage device further includes a second switch circuit, which is connected to the battery controller and the electric cabinet controller respectively; The second switch circuit is used to open the path between the battery controller and the electric cabinet controller before the battery controller is started or when the battery controller is in an abnormal power supply state.

9. The energy storage device according to claim 8, characterized in that: The battery controller is also used to control the second switch circuit to disconnect the path between the battery controller and the electric cabinet controller when the battery controller is in a normal power supply state.

10. The energy storage device according to claim 1, characterized in that: The energy storage device includes a plurality of starting electric cabinets, and the battery controller is used to determine a target starting electric cabinet from the plurality of starting electric cabinets and to conduct a path between the target starting electric cabinet and the battery controller.

11. The energy storage device according to claim 8, characterized in that: The energy storage device further includes a third power supply circuit; the third power supply circuit is respectively connected to the first bus power supply and the battery controller; The third power supply circuit is used to obtain electrical energy from the first bus power supply to power the battery controller after the battery controller is started.

12. The energy storage device according to claim 11, characterized in that: The third power supply circuit includes a second bus power supply, a first switch and a second switch; the second bus power supply is connected to the first switch; the first switch is also connected to the battery controller, the second switch is connected to the first bus power supply, and the second switch is also connected to the battery controller; The first switch is used to conduct the path between the second bus power supply and the battery controller after the battery controller is started; the second switch is used to conduct the path between the first bus power supply and the battery controller after the battery controller is started.

13. The energy storage device according to claim 12, characterized in that: The third power supply circuit further includes a redundancy module; the redundancy module is respectively connected to the first switch, the second switch and the battery controller; The redundancy module is used to control the second switch to connect the path between the first bus power supply and the battery controller after the battery controller is started, and to control the first switch to connect the path between the second bus power supply and the battery controller when a failure of the first bus power supply is detected.

14. The energy storage device according to claim 1, characterized in that: The energy storage device further includes a first busbar and a second busbar, the input ends of the first power circuit and the second power circuit are both connected to the first busbar, and the output ends of the first power circuit and the second power circuit are connected to the battery controller via the second busbar; The first power supply circuit and the second power supply circuit are used to obtain electric energy from the first bus for storage, and transmit the stored electric energy to the battery controller through the second bus.

15. An energy storage system of a high-pressure direct-mounted energy storage valve, characterized in that: The energy storage system comprises a control device and at least one energy storage device according to any one of claims 1 to 14; The control device is used to control the start-up of the energy storage device.

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