Fusion switch, high-voltage box and battery energy storage system

Abstract

The embodiment of the utility model provides a fusion switch, a high-voltage box and a battery energy storage system. The fusion switch comprises a main switch suitable for being coupled between a battery cluster and an energy storage converter, and the main switch has a switching-on state enabling a loop between the battery cluster and the energy storage converter to be switched on and a switching-off state enabling the loop between the battery cluster and the energy storage converter to be switched off; a circuit board; the controller is arranged on the circuit board and comprises a cluster-level battery management system suitable for controlling the battery clusters, and the controller is suitable for being electrically connected with the energy storage converter and is suitable for sending out opening and closing signals; and the switch control circuit is arranged on the circuit board and electrically connected with the controller, and the switch control circuit is suitable for controlling the main switch to execute opening operation or closing operation based on the opening and closing signal from the controller.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of energy storage system technology, and more specifically, to a fusion switch, high-voltage box, and battery energy storage system. Background Technology

[0002] A battery energy storage system includes battery clusters, a high-voltage box, a PCS (Power Conversion System), and an EMS (Energy Management System). The system stores excess electrical energy from the grid in the battery clusters and releases this stored energy back to the grid as electrical energy when needed. The high-voltage box connects the battery clusters and the power conversion system, and it houses a BCU (Battery Cluster Unit) and a converged switch.

[0003] The BCU circuit board houses a controller, which includes a cluster-level battery management system (BMS) suitable for controlling the battery clusters. The cluster-level BMS is electrically connected to the corresponding individual battery pack management systems (BMSs) to receive and process performance parameters of multiple individual cells collected by each BMS to evaluate the overall state of the battery cluster. The controller can also receive and process information from other electrical components outside the battery clusters.

[0004] The integrated switch includes a circuit board and mechanical components such as a main switch. The circuit board is equipped with a switch control circuit for controlling the main switch to perform opening or closing operations. The main switch is coupled to the path between the battery pack and the energy storage converter. When the main switch is closed, the path between the battery pack and the energy storage converter is stably connected; when the main switch is opened, the path between the battery pack and the energy storage converter is reliably disconnected.

[0005] The BCU controller can be electrically connected to the PCS and EMS, and can also be electrically connected to the switching control circuit of the fusion switch. The BCU can send opening / closing signals to the switching control circuit based on the detection of an abnormal state of the battery cluster or upon receiving control signals from the PCS or EMS, so that the switching control circuit controls the main switch to perform an opening or closing operation. Utility Model Content

[0006] In a first aspect of this disclosure, a fusion switch is provided, comprising: a main switch adapted to be coupled between a battery cluster and an energy storage converter, the main switch having a closed state that connects a circuit between the battery cluster and the energy storage converter and an open state that disconnects a circuit between the battery cluster and the energy storage converter; a circuit board; a controller disposed on the circuit board and including a cluster-level battery management system adapted to control the battery cluster, the controller being adapted to be electrically connected to the energy storage converter and adapted to issue open / close signals; and a switch control circuit disposed on the circuit board and electrically connected to the controller, the switch control circuit being adapted to control the main switch to perform an open or close operation based on the open / close signals from the controller.

[0007] In some embodiments, the fusion switch further includes a detection circuit disposed on a circuit board and electrically connected to the controller to send at least one of the following information to the controller: voltage information of the battery cluster, voltage information of the energy storage converter, current information of the circuit, contact temperature information of the main switch, and insulation information of the fusion switch.

[0008] In some embodiments, the controller includes a first controller and a second controller disposed on a circuit board, wherein the first controller includes a cluster-level battery management system, and the second controller is adapted to receive at least one of the following information: voltage information of the battery cluster, voltage information of the energy storage converter, current information of the circuit, contact temperature information of the main switch, and insulation information of the fusion switch, and the first controller is electrically connected to the second controller.

[0009] In some embodiments, the fusion switch further includes a current sensing element disposed in an adjacent loop; and the detection circuit includes a current sensing circuit electrically connected to the current sensing element to send current information of the loop detected by the current sensing element to the controller.

[0010] In some embodiments, the detection circuit further includes: a first voltage detection circuit adapted to be electrically connected to a portion of the circuit between the main switch and the battery cluster to send voltage information of the battery cluster to the controller; and a second voltage detection circuit adapted to be electrically connected to a portion of the circuit between the main switch and the energy storage converter to send voltage information of the energy storage converter to the controller.

[0011] In some embodiments, the detection circuit further includes at least one of the following: a temperature detection circuit adapted to send contact temperature information of the main switch to the controller; and an insulation detection circuit adapted to send insulation information of the fusion switch to the controller.

[0012] In some embodiments, the fusion switch further includes a motor located outside the circuit board, the motor being connected to the main switch to drive the main switch to perform opening and closing operations, and the switch control circuit including a driver that controls the motor to rotate when receiving opening and closing signals; or, the fusion switch further includes an electromagnet located outside the circuit board, the opening or closing operation of the main switch being driven by the electromagnet, and the switch control circuit controlling the energization state of the electromagnet's coil to switch when receiving opening and closing signals.

[0013] In some embodiments, the fusion switch further includes a precharge switch coupled to the circuit.

[0014] In a second aspect of this disclosure, a high-voltage box is provided. The high-voltage box includes a fusion switch according to a first aspect of this disclosure.

[0015] In a third aspect of this disclosure, a battery energy storage system is provided. The battery energy storage system includes a battery cluster, an energy storage converter, and a fusion switch according to a first aspect of this disclosure. A controller is electrically connected to the energy storage converter via an interface on a circuit board. When the controller receives a closing / opening signal from the energy storage converter, it outputs a closing / opening signal to the switch control circuit.

[0016] In the embodiments according to this disclosure, the circuit board of the fusion switch not only has a switch control circuit for controlling the switch to perform opening or closing operations, but also integrates the function of a battery cluster management unit. The high-voltage box does not require an additional battery cluster management unit, thus eliminating the issue of connecting the BCU circuit board and the fusion switch circuit board via external wires. Furthermore, integrating the function of the battery cluster management unit onto the circuit board of the fusion switch allows for the integration of the battery cluster management unit and some mechanical components of the fusion switch, helping to reduce the size and cost of the high-voltage box.

[0017] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0019] Figure 1 A schematic block diagram of a high-voltage box according to an embodiment of the present disclosure is shown, the high-voltage box employing a fusion switch according to an embodiment of the present disclosure;

[0020] Figure 2 A schematic block diagram of a fusion switch according to an embodiment of the present disclosure is shown;

[0021] Figure 3 A schematic block diagram of a fusion switch according to another embodiment of the present disclosure is shown; and

[0022] Figure 4 A schematic block diagram of a battery energy storage system according to an embodiment of the present disclosure is shown. Detailed Implementation

[0023] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0024] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0025] As described above, a conventional high-voltage box contains a Block Control Unit (BCU) and a fusion switch. The BCU controller can control the main switch to perform opening or closing operations via the fusion switch's switching control circuit. Since the controller is located on the BCU's circuit board, and the fusion switch's switching control circuit is located on the fusion switch's circuit board, the two circuit boards must be connected by external wires to enable communication between the controller and the switch control circuit. Furthermore, the two circuit boards are relatively large and expensive, which is detrimental to reducing the size and cost of the high-voltage box.

[0026] Embodiments of this disclosure provide a fusion switch, a high-voltage box, and a battery energy storage system. The circuit board of the fusion switch integrates the functionality of a battery cluster management unit (BCU), eliminating the need for an additional BCU in the high-voltage box. This avoids the problem of connecting the circuit boards of the BCU and the fusion switch via external wires, and also reduces the size and cost of the high-voltage box. In the following sections, [further details will be provided]. Figures 1 to 4 The principles of this disclosure are described.

[0027] Figure 1 A schematic block diagram of a high-voltage box 1000 according to an embodiment of the present disclosure is shown, the high-voltage box employing a fusion switch 100 according to an embodiment of the present disclosure. Figure 2A schematic block diagram of a fusion switch 100 according to an embodiment of the present disclosure is shown.

[0028] See Figure 1 and Figure 2 In some embodiments, the fusion switch 100 may include electronic components integrated on the circuit board 20 and mechanical components such as the main switch 11, motor 15, and current sensing element 512 (which may be, but is not limited to, a Hall sensor or a shunt) located outside the circuit board 20.

[0029] The main switch 11 is coupled to the circuit 13 between the battery cluster 200 and the energy storage converter (PCS) 300. The number and type of the main switches 11 can be set according to requirements; the main switches 11 only need to be able to achieve closing and opening functions through the contact and separation of moving and stationary contacts. In some embodiments, the fusion switch 100 may also include a pre-charge switch 12 coupled to the circuit 13. The main switch 11 has a closed state and an open state. When the main switch 11 is in the closed state, the circuit 13 between the battery cluster 200 and the energy storage converter 300 is stably connected to allow electrical energy to be stored in the battery cluster 200 from the grid or released from the battery cluster 200 to the grid. When the main switch 11 is in the open state, the circuit 13 between the battery cluster 200 and the energy storage converter 300 is reliably disconnected.

[0030] Electronic components may include a controller (also referred to as a microcontroller, MCU) 30 and a switch control circuit 40 mounted on circuit board 20. The controller 30 includes a cluster-level battery management system (BMS) suitable for controlling the battery clusters 200. The cluster-level battery management system is mainly used to monitor battery-related information. The cluster-level battery management system may include a SOC estimation module, a SOH module, a battery information module, an interaction module, etc. In some embodiments, the battery energy storage system may include multiple battery clusters, each of which can be managed by a corresponding cluster-level battery management system. Each battery cluster includes multiple battery packs (also referred to as battery modules), each battery pack includes multiple individual cells, and each battery pack can be managed by a corresponding battery pack management system. The cluster-level battery management system is adapted to be electrically connected to the corresponding battery pack management systems. Each battery pack management system is used to collect performance parameters of the corresponding multiple individual cells and upload these parameters to the cluster-level battery management system. The cluster-level battery management system can evaluate the overall state of the battery cluster based on the performance parameters of the multiple individual cells. The performance parameters of the multiple individual cells include, for example, state parameters such as voltage, current, and temperature of each individual cell.

[0031] See Figure 1 and Figure 2The controller 30 and the energy storage converter 300 are electrically connected, and the controller 30 is also electrically connected to the switch control circuit 40. The switch control circuit 40 can control the main switch 11 to perform an opening or closing operation based on the opening / closing signals from the controller 30. It can be understood that for the combined switch 100 including the main switch 11 and the precharge switch 12, the switch control circuit 40 controls the main switch 11 and the precharge switch 12 to perform an opening operation (corresponding to the opening signal) or a closing operation (corresponding to the closing signal) based on the opening / closing signals from the controller 30. For example, when the battery energy storage system starts up, the controller 30 first sends a precharge switch closing signal, which causes the precharge switch 12 to close via the switch control circuit 40. After receiving a precharge completion signal, the controller 30 then sends a main switch closing signal, which causes the main switch 11 to close via the switch control circuit 40. The opening sequence of the main switch 11 and the precharge switch 12 can be set as needed to ensure reliable disconnection of the circuit 13 and the safety of related equipment.

[0032] See Figure 2 In some embodiments, the circuit board 20 is provided with an interface 60, which includes a power interface and a communication interface. In some embodiments, the circuit board 20 may be provided with a voltage converter 71, and the power supply 81 can be coupled to the controller 30 through the power interface and the voltage converter 71. The voltage converter 71 is used to provide the controller 30 with a lower voltage DC power suitable for the operation of the controller 30. In some embodiments, the circuit board 20 may be provided with a driver 41, and the power supply 81 can provide electrical energy to the driver 41 through the power interface and the line 72 to drive the motor 15 to rotate.

[0033] See Figure 2 In some embodiments, the controller 30 can output signals to dry contacts, contactors, fan controls, etc., via the communication interface DO. In some embodiments, the controller 30 can receive temperature detection, relay signal feedback, etc., via the communication interface DI. In some embodiments, the controller 30 can communicate bidirectionally with external devices (such as the energy storage converter 300, energy management system 400, etc.) via the communication interface based on CAN protocol, RS485 protocol, Ethernet protocol, etc. The controller 30 can upload the received and processed information to the energy storage converter 300 and the energy management system (EMS) 400, and can receive control signals from the energy storage converter 300 or the energy management system 400 regarding the switching of the main switch 11's open / close state. After receiving the control signal from the energy storage converter 300 or the energy management system 400, the controller 30 can output the aforementioned open / close signal to the switch control circuit 40, causing the main switch 11 to perform an open or close operation. In addition, the controller 30 can also directly send the aforementioned open / close signal to the switch control circuit 40 based on the abnormal information received by the cluster-level battery management system.

[0034] The fusion switch 100 provided in this embodiment not only has a switch control circuit 40 on its circuit board for controlling the main switch 11 to perform opening or closing operations, but also integrates the function of a battery cluster management unit (BCU). The high-voltage box 1000 does not require an additional battery cluster management unit, thus eliminating the need for external wire connections between the battery cluster management unit's circuit board and the fusion switch's circuit board. Furthermore, integrating the battery cluster management unit's function onto the fusion switch 100's circuit board allows for the integration of some mechanical components of the battery cluster management unit and the fusion switch 100, helping to reduce the size and cost of the high-voltage box 1000.

[0035] See Figure 2 In some embodiments, the controller 30 can also receive information from electrical components other than the battery cluster. Specifically, the fusion switch 100 may also include a detection circuit disposed on the circuit board 20, which is electrically connected to the controller 30. For example, it can send at least one of the following information to the controller 30: voltage information of the battery cluster 200, voltage information of the energy storage converter 300, current information of the circuit 13, contact temperature information of the main switch 11, and insulation information of the fusion switch 100 (insulation information between the live parts of the fusion switch and ground). Of course, in some alternative embodiments, the detection circuit may also send other information to the controller 30, not limited to the examples above. For example, in some embodiments, the detection circuit may also send to the controller 30 the temperature information of the fuse 82 connected in series with the circuit 13 on the high-voltage box 100, and insulation information between ground of other live parts of the high-voltage box 1000 that are not part of the fusion switch, etc.

[0036] See also Figure 1 and Figure 2 In some embodiments, the current sensing element 512 may be, but is not limited to, a Hall sensor, located near the loop 13. The detection circuit may include a current sensing circuit 51, which is electrically connected to the Hall sensor via an external wire. During the charging and discharging process of the battery cluster 200, the current sensing circuit 51 can obtain the current information of the loop 13 through the Hall sensor and send the current information to the controller 30.

[0037] In some embodiments, a shunt can be used instead of a Hall sensor as a current sensing element. The shunt is coupled to the loop 13, and the current sensing circuit 51 obtains the current information of the loop 13 through the shunt and sends the current information to the controller 30.

[0038] See Figure 1 and Figure 2In some embodiments, the detection circuit may include a voltage detection circuit 52 for detecting the voltage of at least one of the battery cluster voltage and the voltage of the energy storage converter 300. In some embodiments, the voltage detection circuit 52 includes a first voltage detection circuit, which is electrically connected via an external wire to a portion of the circuit 13 between the main switch 11 and the battery cluster 200. During the charging and discharging of the battery cluster 200, the first voltage detection circuit sends voltage information of the battery cluster 200 to the controller 30. In some embodiments, the voltage detection circuit 52 includes a second voltage detection circuit, which is electrically connected via an external wire to a portion of the circuit 13 between the main switch 11 and the energy storage converter 300. During the charging and discharging of the battery cluster 200, the second voltage detection circuit sends voltage information of the energy storage converter 300 to the controller 30.

[0039] See Figure 1 and Figure 2 In some embodiments, the detection circuit may further include a temperature detection circuit for detecting the temperature of some electrical components of the fusion switch 100 and / or the high-voltage box. In some embodiments, the temperature detection circuit may include a temperature detection circuit 53 for detecting the contact temperature of the main switch 11. In some embodiments, the temperature detection circuit may include a temperature detection circuit for detecting the temperature of the fuse 82. In some embodiments, the temperature of the electrical components may be sensed by a temperature sensor, and the temperature detection circuit may be electrically connected to the temperature sensor, for example, via an external wire, to convert the temperature signal into an electrical signal and provide it to the controller 30.

[0040] See Figure 1 and Figure 2 In some embodiments, the detection circuit may further include an insulation detection circuit 54 for detecting insulation information of the fusion switch 100, such as insulation between the energized components of the fusion switch 100 and ground. In some embodiments, the insulation detection circuit 54 includes insulation detection circuits for detecting insulation information between the contact input terminals of the main switch 11 and ground and insulation information between the contact output terminals of the main switch 11 and ground. The insulation detection circuit 54 can be electrically connected to the energized component being detected via an external wire. In some embodiments, the insulation detection circuit 54 may include insulation detection circuits for detecting insulation information between ground and other energized components of the high-voltage box 1000 that are not part of the fusion switch 100. The insulation detection circuit 54 sends the detected insulation information to the controller 30. By setting an insulation detection circuit to detect the insulation information of the fusion switch 100 and the high-voltage box 1000, the operation of the fusion switch 100 and the high-voltage box 1000 in an insulation failure state can be avoided.

[0041] exist Figure 2In the illustrated embodiment, the closing and opening operations of the main switch 11 are driven by the motor 15. Specifically, the motor 15 is connected to the main switch 11 to drive the main switch 11 to perform opening or closing operations. The switch control circuit 40 includes the aforementioned driver 41. When the driver 41 receives the opening / closing signal from the controller 30, it controls the motor 15 to rotate, causing the moving contact of the main switch 11 to separate or make contact with the stationary contact.

[0042] In some alternative embodiments, the closing or opening operation of the main switch 11 can be driven by an electromagnet disposed outside the circuit board 20. The switch control circuit 40 controls the switching of the energization state of the electromagnet's coil upon receiving the closing / opening signal. For example, when a closing signal is received, the electromagnet's coil is energized, and the electromagnet can attract the moving contact of the main switch 11, causing the moving contact of the main switch 11 to contact the stationary contact. When an opening signal is received, the electromagnet's coil is de-energized, and the electromagnet no longer attracts the moving contact of the main switch 11, allowing the moving contact to reset and separate from the stationary contact.

[0043] The above example illustrates an implementation where the closing and / or opening operations of the main switch 11 are driven by a motor 15 or an electromagnet. It can be understood that for a fusion switch 100 with a pre-charge switch 12, the closing and / or opening operations of the pre-charge switch 12 can be driven by the switch control circuit 40 through a corresponding motor or electromagnet.

[0044] Figure 3 A schematic block diagram of a fusion switch 100 according to another embodiment of the present disclosure is shown. Figure 2 The illustrated fusion switch 100 is a variation. The main difference is that the function of the controller 30 is achieved collaboratively by a first controller 31 and a second controller 32 disposed on the circuit board 20. Without conflict, Figure 3 The physical connections, electrical connections, and working principles between the electronic / mechanical components of the fusion switch 100 shown can be found in the description of the fusion switch 100 above, and will not be repeated here.

[0045] See Figure 3The first controller 31 may include a cluster-level battery management system (BMS) suitable for controlling the battery cluster 200. The cluster-level battery management system includes a SOC estimation module, a SOH module, a battery information module, an interaction module, etc. The first controller 31 is mainly used to monitor battery-related information. The first controller 31 is electrically connected to the corresponding battery pack management system, for example. The second controller 32 is mainly used to receive information from electrical components other than the cluster-level battery management system. For example, the second controller 32 is electrically connected to a detection circuit to receive at least one of the following information: voltage information of the battery cluster 200, voltage information of the energy storage converter 300, current information of the circuit 13, temperature information (including but not limited to the contact temperature information of the main switch 11, and the temperature information of the fuse 82 connected in series with the circuit 13 on the high-voltage box 100), and insulation information (including but not limited to the insulation information of the fusion switch, and the insulation information between other live parts of the high-voltage box 1000 that are not part of the fusion switch and ground). It is understood that the information received by the second controller 32 through the detection circuit is not limited to the examples above.

[0046] The first controller 31 and the second controller 32 are electrically connected to each other, and they cooperate to realize the function of the controller 30. In some embodiments, the electrical connection between the controller 30 and the interface 60, and the electrical connection between the controller 30 and the switch control circuit 40, can be implemented, for example, as the electrical connection between the second controller 32 and the interface 60, and the electrical connection between the second controller 32 and the switch control circuit 40. In this way, the integrated switch 100 can be compatible with the user-designed first controller 31, including a cluster-level battery management system, to better meet the user's needs.

[0047] Embodiments of this disclosure also provide a high-voltage box 1000, which may include the fusion switch 100 provided in the above embodiments. The high-voltage box 1000 may be equipped with a power supply 81 for supplying power to the fusion switch 100 and a fuse 82 connected in series in the circuit 13. The high-voltage box 1000 may also be equipped with other supporting components 83, which may include, but are not limited to, a Hall sensor for detecting the current in the circuit 13.

[0048] Figure 4A schematic block diagram of a battery energy storage system according to an embodiment of the present disclosure is shown. The battery energy storage system may include a battery cluster 200, an energy storage converter 300, and at least one integrated switch 100. In some embodiments, the battery energy storage system may further include an energy management system (EMS) 400. As previously described, the energy storage converter 300 and the integrated switch 100 are electrically connected via a communication interface, and their communication method may be based on, for example, CAN communication protocol, RS485 communication protocol, Ethernet communication protocol, etc. The controller of the integrated switch 100 can transmit the obtained SOC information and SOH information of the cluster-level battery management system, the temperature information and insulation information of the switch contacts, the current information of the circuit 13, the voltage information of the battery cluster 200, and the voltage information of the energy storage converter 300 to the energy storage converter 300 via communication.

[0049] Furthermore, the energy storage converter 300 and the energy management system 400 are electrically connected, and their communication methods can be based on, for example, the CAN communication protocol or the RS485 communication protocol. The integrated switch 100 and the energy management system 400 are also electrically connected, and their communication methods can be based on, for example, the CAN communication protocol. The controller 30 of each integrated switch 100 can output opening / closing signals to the switch control circuit 40 based on the received opening / closing signals from the energy storage converter 300 or the energy management system 400, controlling each switch to perform opening or closing operations.

[0050] In the embodiments of this disclosure, communication between the integrated switch 100, the energy storage converter 300, and the energy management system 400 can enable the efficient, safe, and stable operation of the battery energy storage system.

[0051] In addition, the integrated switch 100 of this embodiment is applicable to various energy storage systems. Multiple cooperating integrated switches 100 and battery clusters 200 can be compatible with large-capacity energy storage converters 300, thereby realizing centralized energy storage.

[0052] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fusion switch (100), characterized in that, include: A main switch (11) is adapted to be coupled between a battery cluster (200) and an energy storage converter (300), the main switch (11) having a closed state that enables the circuit (13) between the battery cluster (200) and the energy storage converter (300) to be conducted and an open state that enables the circuit (13) between the battery cluster (200) and the energy storage converter (300) to be disconnected; Circuit board (20); A controller (30), disposed on the circuit board (20) and including a cluster-level battery management system adapted to control the battery clusters (200), the controller (30) being adapted to be electrically connected to the energy storage converter (300) and adapted to issue opening and closing signals; and A switch control circuit (40) is disposed on the circuit board (20) and electrically connected to the controller (30). The switch control circuit (40) is adapted to control the main switch (11) to perform a tripping operation or a closing operation based on the tripping and closing signals from the controller (30).

2. The fusion switch (100) according to claim 1, characterized in that, The fusion switch (100) also includes a detection circuit, which is disposed on the circuit board (20) and electrically connected to the controller (30) to send at least one of the following information to the controller (30): voltage information of the battery cluster (200), voltage information of the energy storage converter (300), current information of the circuit (13), contact temperature information of the main switch (11), and insulation information of the fusion switch.

3. The fusion switch (100) according to claim 2, characterized in that, The controller (30) includes a first controller (31) and a second controller (32) disposed on the circuit board (20), and The first controller (31) includes the cluster-level battery management system. The second controller (32) is adapted to receive at least one of the following information: voltage information of the battery cluster (200), voltage information of the energy storage converter (300), current information of the circuit (13), contact temperature information of the main switch (11), and insulation information of the fusion switch. The first controller (31) is electrically connected to the second controller (32).

4. The fusion switch (100) according to claim 2 or 3, characterized in that, The fusion switch (100) also includes a current sensing element (512) disposed adjacent to the circuit (13); and The detection circuit includes a current detection circuit (51) which is electrically connected to the current detection element (512) to send current information of the loop (13) detected by the current detection element (512) to the controller (30).

5. The fusion switch (100) according to claim 2 or 3, characterized in that, The detection circuit further includes: A first voltage detection circuit is adapted to be electrically connected to the portion of the circuit (13) between the main switch (11) and the battery cluster (200) to send voltage information of the battery cluster (200) to the controller (30); and A second voltage detection circuit is adapted to be electrically connected to the portion of the circuit (13) between the main switch (11) and the energy storage converter (300) to send voltage information of the energy storage converter (300) to the controller (30).

6. The fusion switch (100) according to claim 2 or 3, characterized in that, The detection circuit further includes at least one of the following: Temperature detection circuit (53), the temperature detection circuit (53) is adapted to send the contact temperature information of the main switch (11) to the controller (30); An insulation detection circuit (54) is adapted to send insulation information of the fusion switch to the controller (30).

7. The fusion switch (100) according to any one of claims 1 to 3, characterized in that, The fusion switch (100) also includes a motor (15) located outside the circuit board (20). The motor (15) is connected to the main switch (11) to drive the main switch (11) to perform opening and closing operations. The switch control circuit (40) includes a driver (41). When the driver (41) receives the opening and closing signals, it controls the motor (15) to rotate. Alternatively, The fusion switch (100) also includes an electromagnet located outside the circuit board (20). The opening or closing operation of the main switch (11) is driven by the electromagnet. When the switch control circuit (40) receives the opening or closing signal, it controls the energization state of the coil of the electromagnet to switch.

8. The fusion switch (100) according to any one of claims 1 to 3, characterized in that, It also includes a precharge switch (12) coupled to the circuit (13).

9. A high-voltage box, characterized in that, Includes the fusion switch (100) according to any one of claims 1 to 8.

10. A battery energy storage system, characterized in that, It includes the battery cluster (200), the energy storage converter (300), and the fusion switch (100) according to any one of claims 1 to 8. The controller (30) is electrically connected to the energy storage converter (300) through the interface (60) on the circuit board. When the controller (30) receives the opening and closing signal of the energy storage converter (300), it outputs the opening and closing signal to the switch control circuit (40).

Images