Electrical connection cut-off device with remote sudden stop function and energy management system

Abstract

The embodiment of the utility model provides an electrical connection cut-off device with a remote sudden stop function and an energy management system. The electrical connection cut-off device is characterized in that the electrical connection cut-off device comprises an EMS controller, a relay and a grid-connected circuit breaker, the EMS controller is electrically connected with the relay, the relay is electrically connected with the grid-connected circuit breaker, the EMS controller is used for outputting control signals, the relay is used for responding to the control signals, and the grid-connected circuit breaker is electrically connected with the relay. And the grid-connected circuit breaker is controlled to be changed into a breaking state from a conducting state so as to cut off the electrical connection between the electrical connection cut-off device and the power distribution network. The electrical connection cut-off device can be provided with an accurate and rapid response mechanism, electrical connection cut-off can be completed within a short time when an emergency occurs, and negative effects such as equipment damage and electric power accident range enlargement possibly caused by faults or continuous dangerous conditions are reduced as much as possible; and the stability and safety of the whole power grid system and related equipment are ensured.

Description

Technical Field

[0001] This application relates to the technical field of electrochemical energy storage, and in particular to an electrical connection disconnection device and energy management system with remote emergency stop function. Background Technology

[0002] Existing energy storage devices, whether containerized or cabinet-based, mostly only allow users to press the emergency stop button locally to disconnect the power supply in case of an emergency. For example, if a serious accident such as a fire or flood occurs at the power plant site, or if abnormal fluctuations occur on the distribution network side affecting the safe operation of the equipment, if maintenance personnel cannot arrive at the site in time to operate the emergency stop button, the continued operation of the equipment may lead to more serious equipment damage, fire spread, or even endanger personnel's lives.

[0003] Traditional electrical connection disconnection devices often rely solely on locally operated emergency stop buttons, which cannot meet the need for timely handling of emergency faults. Utility Model Content

[0004] This application provides an electrical connection disconnection device and an energy management system with remote emergency stop function, which can realize rapid remote emergency stop and protect circuit safety.

[0005] This application provides an electrical connection disconnection device with remote emergency stop function, including an EMS controller, a relay, and a grid-connected circuit breaker. The EMS controller is electrically connected to the relay, and the relay is electrically connected to the grid-connected circuit breaker. The EMS controller is used to output a control signal, and the relay is used to respond to the control signal and control the grid-connected circuit breaker to change from a conducting state to a disconnected state, so as to disconnect the electrical connection disconnection device from the power distribution network.

[0006] In some embodiments, the relay includes a first contact switch that changes from a normally open state to a closed state when the EMS controller outputs the control signal, thereby causing the grid-connected circuit breaker to change from a conducting state to an open state.

[0007] In some embodiments, the relay includes an electromagnetic coil that, when the EMS controller outputs the control signal, engages to change the first contact switch from a normally open state to a closed state.

[0008] In some implementations, the control signal includes a preset voltage output from the digital output point of the EMS controller.

[0009] In some implementations, the preset voltage is 24V±1V.

[0010] In some embodiments, the grid-connected circuit breaker includes a tripping device and a control coil connected to the tripping device. When the EMS controller outputs the control signal, the control coil is used to drive the tripping device to trip.

[0011] In some embodiments, the electrical connection disconnection device further includes an emergency stop switch connected in parallel with the relay, the emergency stop switch being used to control the grid-connected circuit breaker to change from a conducting state to a disconnected state.

[0012] In some embodiments, the emergency stop switch includes a second contact switch, which changes from a normally open state to a closed state when the second contact switch changes from a conducting state to an open state.

[0013] This application also provides an energy management system, including:

[0014] The electrical connection disconnection device with remote emergency stop function described in any of the above embodiments;

[0015] An energy storage device, wherein the energy storage device is connected to the electrical connection disconnection device.

[0016] In some embodiments, the energy management system further includes a monitoring module electrically connected to the EMS controller of the electrical connection disconnection device.

[0017] In the electrical connection disconnection device and energy system with remote emergency stop function in the embodiments of this application, the electrical connection disconnection device has a precise and rapid response mechanism to ensure that the electrical connection is disconnected in a short time when an emergency occurs, so as to minimize the adverse consequences such as equipment damage and expansion of the scope of power accident that may be caused by the continued fault or dangerous situation, and to ensure the stability and safety of the entire power grid system and related equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a circuit diagram of the energy management system according to an embodiment of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] Please see Figure 1 , Figure 1 This is a circuit diagram of the energy management system according to an embodiment of this application. The electrical connection disconnection device 10 with remote emergency stop function provided in this embodiment includes an EMS controller 11 (Energy Management System), a relay KA1, and a grid-connected circuit breaker Q1. The EMS controller 11 is electrically connected to the relay KA1, and the relay KA1 is electrically connected to the grid-connected circuit breaker Q1. The EMS controller 11 is used to output control signals, and the relay KA1 is used to respond to the control signals and control the grid-connected circuit breaker Q1 to change from a conducting state to an open state, so as to disconnect the electrical connection disconnection device 10 from the power distribution network.

[0022] The electrical connection disconnection device 10 can be used to connect the power distribution network and energy storage equipment to realize power transmission and on / off control. The EMS controller 11 is responsible for monitoring the operating status of the energy management system and sending a control signal to relay KA1 when an abnormality is detected, thereby achieving remote emergency stop. Sensors and control sensors can be connected to the EMS controller 11. The sensors can collect various parameters of the energy storage equipment in real time, such as voltage, current, power, and temperature. Simultaneously, the sensors can also monitor the status of the power distribution network, including grid frequency and load demand. The EMS controller 11 analyzes the data collected by the sensors to determine if any abnormalities exist (such as current overload, overtemperature, smoke alarm, etc.) and sends a control signal immediately.

[0023] Relay KA1 receives a control signal from EMS controller 11 and responds to the control signal to control the grid-connected circuit breaker Q1 to change from the conducting state to the disconnecting state. Relay KA1 can be an electromagnetic relay, an intermediate relay, or an intelligent relay, etc., without limitation. The appropriate type of relay KA1 can be selected based on factors such as operating voltage, current capacity, ambient temperature, installation space, and compatibility with EMS controller 11 and grid-connected circuit breaker Q1.

[0024] Electromagnetic relays primarily utilize electromagnetic principles to operate switch contacts. When an electromagnetic relay receives an electrical signal from the EMS controller 11, the coil generates a magnetic field, attracting the moving iron core to move, thereby closing or opening the contacts. Electromagnetic relays are characterized by their simple structure, low cost, and rapid operation.

[0025] Intermediate relays provide signal amplification and isolation, ensuring reliable signal transmission and equipment control even in complex control systems. If the drive capability of the EMS controller 11 output is insufficient to directly control the high-power grid-connected circuit breaker Q1, or if it is necessary to convert one input signal into multiple output signals, an intermediate relay can be used.

[0026] Intelligent relays have an internal microprocessor that provides additional functions beyond basic switching, such as self-diagnosis, communication interfaces, and logic operations. They can connect to the EMS controller 11 or other intelligent devices via a network for remote monitoring and programming configuration, making them suitable for highly intelligent power management systems.

[0027] The grid-connected circuit breaker Q1 is used to control the electrical connection between the energy storage device and the distribution network. The grid-connected circuit breaker Q1 can also have overload protection and short-circuit protection functions. The EMS controller 11 can be electrically connected to the control terminal of the relay KA1, and the relay KA1 can be connected to the control circuit of the grid-connected circuit breaker Q1.

[0028] In this application, the grid-connected circuit breaker Q1 can be a grid-connected circuit breaker with shunt trip function, that is, a circuit breaker that can be tripped quickly (i.e., changed from the conducting state to the disconnecting state) by means of an electromagnetic coil under remote control.

[0029] Under normal operating conditions, the grid-connected circuit breaker Q1 is in the conducting state, ensuring stable power transmission between the energy storage device and the distribution network. When the distribution network or energy storage device encounters abnormal situations such as a fire alarm being triggered (smoke concentration exceeding a set threshold), an abnormal rise in water level, or electrical parameters deviating significantly from the normal range, the EMS controller 11 immediately outputs a control signal. Upon receiving the control signal, the relay KA1 can quickly control the grid-connected circuit breaker Q1 to change from the conducting state to the disconnecting state, thereby cutting off the electrical connection between the electrical connection disconnection device 10 and the distribution network, which also cuts off the electrical connection between the energy storage device and the distribution network. Remote emergency stop can be achieved through the EMS controller 11, which means that the electrical connection between the electrical connection disconnection device 10 and the distribution network can be quickly cut off in abnormal situations, effectively preventing the escalation of power accidents and thus protecting personal and equipment safety.

[0030] The remote emergency stop function allows operators to perform emergency operations when they are away from the site. The EMS controller 11 has high precision, and its output control signal can be accurately transmitted to the relay KA1. The relay KA1 can respond quickly to the control signal and can take corresponding actions the moment it receives the signal, thereby driving the grid-connected circuit breaker Q1 to disconnect quickly.

[0031] The electrical connection disconnection device 10 with remote emergency stop function provided in this application embodiment has a precise and rapid response mechanism, which ensures that the electrical connection is disconnected in a short time when an emergency occurs, minimizing the adverse consequences such as equipment damage and expansion of the scope of power accidents that may be caused by the continued occurrence of faults or dangerous situations, and ensuring the stability and safety of the entire power grid system and related equipment.

[0032] Understandably, once the abnormal situation is resolved, operators can restore the system to normal operation through local manual means. For example, operators can go to the site and press the manual reset button on the grid-connected circuit breaker Q1 to restore Q1 to the conducting state.

[0033] In some implementations, the relay KA1 includes a first contact switch that changes from a normally open state to a closed state when the EMS controller 11 outputs a control signal, so that the grid-connected circuit breaker Q1 changes from a conducting state to an open state.

[0034] Specifically, under normal operating conditions, the first pair of contacts is in the normally open state, so relay KA1 is not conducting and grid-connected circuit breaker Q1 is allowed to operate normally. The energy storage device maintains an electrical connection with the distribution network through the electrical connection disconnection device 10. When an abnormal situation is detected, the EMS controller 11 outputs a control signal, and the first pair of contacts closes rapidly, causing the control circuit of grid-connected circuit breaker Q1 to lose power, switching grid-connected circuit breaker Q1 from the conducting state to the disconnecting state, thereby disconnecting the electrical connection between the energy storage device and the distribution network.

[0035] In some embodiments, the relay KA1 includes an electromagnetic coil that is activated when the EMS controller 11 outputs a control signal, causing the first contact switch to change from a normally open state to a closed state.

[0036] Under normal operating conditions, the electromagnetic coil of relay KA1 is not energized, the first pair of contacts are in the normally open state, relay KA1 is not conducting and allows the grid-connected circuit breaker Q1 to work normally, and the equipment maintains an electrical connection with the power distribution network through the electrical connection disconnection device 10.

[0037] When an abnormality is detected, the EMS controller 11 outputs a control signal, the electromagnetic coil is energized to generate a magnetic field, attracting the armature to move, causing the first pair of contacts to close quickly, resulting in the de-energization of the control circuit of the grid-connected circuit breaker Q1, which switches the grid-connected circuit breaker Q1 from the conducting state to the disconnecting state, thereby cutting off the electrical connection between the energy storage device and the distribution network.

[0038] An electromagnetic coil typically includes a coil winding, an armature, and a reset mechanism. The coil winding is made of multiple turns of fine copper wire wound around an iron core. When current flows through the coil, a magnetic field is generated, attracting the armature to move. The armature is installed inside the relay KA1 and can move under the influence of the magnetic field generated by the coil winding, actuating the first contact switch. To ensure that the contacts automatically return to the normally open state after the electromagnetic coil is de-energized, the relay KA1 is usually equipped with a reset mechanism (such as a spring). When the electromagnetic coil is de-energized, the spring pulls the armature back to its original position, restoring the first contact switch to the normally open state.

[0039] In some embodiments, the control signal includes a preset voltage output from the digital output point of the EMS controller 11. Using a voltage signal to control the operation of relay KA1 provides a fast response, allowing relay KA1 to directly and quickly respond to voltage changes. The voltage signal can be a DC voltage signal, a low-level or high-level signal, or a pulse-width modulation (PWM) signal. When the control signal is a voltage signal, it can drive the coil of relay KA1 or control the operation of relay KA1 through a simple drive circuit.

[0040] In some embodiments, the preset voltage is 24V±1V. When the operation of relay KA1 is controlled by a DC voltage signal, 24V DC voltage can provide sufficient driving capability with low power consumption, suitable for various industrial applications. The ±1V tolerance range also provides additional fault tolerance for the electrical connection disconnection device 10, ensuring that relay KA1 can still operate stably when the digital output point of EMS controller 11 fluctuates. Therefore, using a preset voltage of 24V±1V as the driving signal for relay KA1 conforms to industrial standards and has good safety, reliability, anti-interference capability, long-distance transmission performance, and compatibility with other systems. In some embodiments, the electrical connection disconnection device 10 may also include a communication interface, through which EMS controller 11 and relay KA1 are connected, and control signals can be transmitted. When EMS controller 11 and relay KA1 are connected via a communication interface (e.g., RS485, CAN bus, or Ethernet), the control signals are mainly digital commands or data frames sent through a communication protocol. These commands are ultimately converted into appropriate electrical signals (such as DC voltage, current, etc.) by the drive circuit in the relay KA1 module, thereby controlling the operation of the relay KA1.

[0041] When the control signal is a digital command or data frame sent via a communication protocol, the electrical connection disconnection device 10 has advantages such as high flexibility, strong anti-interference capability, and high security. Specifically, the control logic can be easily modified through the communication protocol without changing the hardware; the communication interface (such as RS485, CAN bus) can use differential signal transmission, which can effectively resist electromagnetic interference and ensure the integrity and accuracy of the signal; the communication protocol can support data encryption and authentication, ensuring that only authorized devices and users can send and receive control commands, preventing unauthorized access and thus avoiding unauthorized user misoperation, so that the EMS controller 11 outputs control signals under normal circumstances.

[0042] In some implementations, the grid-connected circuit breaker Q1 includes a tripping device and a control coil connected to the tripping device. When the EMS controller 11 outputs a control signal, the control coil is used to drive the tripping device to trip.

[0043] The tripping device can be electromagnetic, spring-reset, or thermomagnetic. Electromagnetic tripping uses electromagnetic force to drive the tripping device. Spring-reset tripping uses an internal spring reset mechanism to ensure automatic reset after the control coil is de-energized. Thermomagnetic tripping automatically triggers tripping when the current is too high, ensuring circuit safety. Under normal operating conditions, the control coil is not energized, the tripping device is in standby mode, and the contacts of the grid-connected circuit breaker Q1 remain closed, allowing energy transfer between the energy storage device and the power distribution network. When an abnormal situation is detected, the EMS controller 11 outputs a control signal, and the relay KA1 responds to the control signal (e.g., the first contact switch changes from normally open to closed), energizing the control coil of the grid-connected circuit breaker Q1. The energized control coil generates a magnetic field, attracting or pushing the tripping device's moving parts, thereby triggering the tripping action and changing the grid-connected circuit breaker Q1 from a conducting state to an open state, thus disconnecting the energy storage device from the power distribution network.

[0044] In some embodiments, the electrical connection disconnection device 10 further includes an emergency stop switch S1, which is connected in parallel with the relay KA1. The emergency stop switch S1 is used to control the grid-connected circuit breaker Q1 from the conducting state to the disconnected state. Thus, the emergency stop switch S1 provides the electrical connection disconnection device 10 with a local emergency stop function independent of the EMS controller 11. This dual emergency stop function ensures that the electrical connection disconnection device 10 can respond quickly under any circumstances. This enables the electrical disconnection device provided in this application embodiment to not only achieve remote emergency stop but also to achieve local emergency stop under special conditions (such as relay KA1 failure or EMS controller 11 failure to output control signals).

[0045] Emergency stop switch S1 is connected in parallel with relay KA1, so regardless of whether relay KA1 is closed, emergency stop switch S1 can control the operation of the grid-connected circuit breaker Q1. This parallel design ensures the independence and reliability of emergency stop switch S1, preventing power disconnection failure due to relay KA1 malfunction. It is understood that when emergency stop switch S1 is pressed, it directly short-circuits the circuit containing relay KA1, allowing the electrical connection disconnection device 10 to prioritize local emergency stop. When the control signal output from EMS controller 11 arrives and emergency stop switch S1 has not activated, relay KA1 responds normally to the remote command. Thus, the priority and coordination mechanisms of the electrical connection disconnection device 10 are improved through the aforementioned methods.

[0046] Under normal circumstances, the emergency stop switch S1 is in the untriggered state, the relay KA1 operates normally according to the control signal from the EMS controller 11, and the grid-connected circuit breaker Q1 remains in the conducting state, allowing power transfer between the energy storage device and the distribution network. When an abnormal situation is detected, and the EMS controller 11 fails to output a control signal or the relay KA1 fails to operate, the user can press the emergency stop switch S1. The emergency stop switch S1 will change the grid-connected circuit breaker Q1 from the conducting state to the open state, cutting off the electrical connection. The emergency stop switch S1 trips via a mechanical interlock or by directly driving the tripping device of the grid-connected circuit breaker Q1.

[0047] In some embodiments, the emergency stop switch S1 may also include an anti-accidental contact device to prevent accidental contact. The anti-accidental contact device may include a protective cover, in which the emergency stop switch is housed.

[0048] In some implementations, the emergency stop switch S1 includes a second contact switch, which changes from a normally open state to a closed state when the second contact switch changes from a normally open state to a closed state, causing the grid-connected circuit breaker Q1 to change from a conducting state to an open state.

[0049] Under normal operating conditions, the second pair of contacts of the emergency stop switch S1 is in the normally open state, and the grid-connected circuit breaker Q1 remains in the conducting state, allowing power transmission between the energy storage device and the distribution network. When on-site personnel discover an abnormal situation, they can immediately press the emergency stop switch S1. The second pair of contacts quickly changes from the normally open state to the closed state, driving the tripping device of the grid-connected circuit breaker Q1 to trip, causing the grid-connected circuit breaker Q1 to change from the conducting state to the open state, cutting off the electrical connection between the energy storage device and the distribution network.

[0050] Please see Figure 1 The energy management system 100 provided in this application embodiment includes an electrical connection disconnection device 10 with remote emergency stop function and an energy storage device, the energy storage device being connected to the electrical connection disconnection device 10. The connection between the energy storage device and the electrical connection disconnection device 10 ensures that the power supply can be quickly cut off in abnormal situations, guaranteeing the safety and reliability of the system.

[0051] In some embodiments, the energy management system 100 further includes a monitoring module electrically connected to the EMS controller 11 of the electrical connection disconnection device 10. The monitoring module maintains real-time communication with the EMS controller 11 to ensure the timeliness and accuracy of the data. When the monitoring module detects an abnormality, it immediately sends an alarm signal to the EMS controller 11. Upon receiving the alarm, the EMS controller 11 can promptly issue a control signal to disconnect the electrical connection disconnection device 10 from the power distribution network.

[0052] The monitoring module is used to acquire real-time operating data of energy storage devices, power distribution networks and other related systems, and transmit the data to the EMS controller 11 for analysis and processing. This ensures that when the energy management system 100 or other systems malfunction and it is necessary to disconnect the energy storage devices from the power distribution network, the EMS controller 11 can promptly issue a control signal to disconnect the electrical connection disconnection device 10 from the power distribution network.

[0053] The operational data acquired by the monitoring module may include, but is not limited to, the following parameters: voltage, current, power, temperature, smoke concentration, humidity, etc. For example, the monitoring module can monitor the voltage levels of the energy storage device and the power distribution network in real time to ensure they remain within safe limits. The monitoring module can also monitor changes in current and detect abnormal conditions such as overload or short circuit. Furthermore, the monitoring module can monitor the temperature of key components such as the energy storage device or the grid-connected circuit breaker Q1 to prevent malfunctions caused by overheating.

[0054] In some implementations, the monitoring module may include at least one of a voltage sensor, a current sensor, a temperature sensor, a smoke sensor, a water immersion sensor, or a humidity sensor.

[0055] In the electrical connection disconnection device 10 with remote emergency stop function and the energy management system 100 provided in this application embodiment, the electrical connection disconnection device 10 has a precise and rapid response mechanism, which can quickly disconnect the electrical connection between the energy storage device and the power distribution network in abnormal situations, effectively preventing the expansion of power accidents and ensuring personal and equipment safety. In addition, the electrical connection disconnection device 10 is also equipped with a local emergency stop switch S1, providing a dual protection mechanism to ensure rapid response under any circumstances.

[0056] In the description of this application, it should be understood that terms such as “first” and “second” are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0057] It should be noted that, in the embodiments of this application, "electrical connection" can be a direct electrical connection between two electrical components or an indirect electrical connection. For example, the electrical connection between A and B can be achieved by A and B being directly connected, or by A and B being indirectly connected through one or more other electrical components.

[0058] The electrical connection disconnection device and energy system with remote emergency stop function provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electrical connection cutting device with a remote emergency stop function, characterized in that, The electrical connection cut-off device comprises an EMS controller, a relay and a grid-connected circuit breaker, the EMS controller is electrically connected with the relay, the relay is electrically connected with the grid-connected circuit breaker, the EMS controller is used for outputting a control signal, the relay is used for responding to the control signal and controlling the grid-connected circuit breaker to change from a conducting state to an open state to cut off the electrical connection between the electrical connection cut-off device and a power distribution network.

2. The electrical connection disconnect device with remote emergency stop function according to claim 1, characterized in that, The relay comprises a first contact switch, when the EMS controller outputs the control signal, the first contact switch changes from a normally open state to a closed state to make the grid-connected circuit breaker change from the conducting state to the open state.

3. The electrical connection disconnect device with remote emergency stop function according to claim 2, characterized in that, The relay comprises an electromagnetic coil, when the EMS controller outputs the control signal, the electromagnetic coil is attracted to make the first contact switch change from the normally open state to the closed state.

4. The electrical connection disconnect device with remote emergency stop function according to claim 3, characterized in that, The control signal comprises a preset voltage output by a digital output point of the EMS controller.

5. The electrical connection disconnect device with remote emergency stop function according to claim 4, characterized in that, The preset voltage is 24V±1V.

6. An electrical connection disconnect device with remote emergency stop function according to any one of claims 1-5, characterized in that, The grid-connected circuit breaker comprises a tripping device and a control coil connected with the tripping device, when the EMS controller outputs the control signal, the control coil is used for driving the tripping device to trip.

7. An electrical connection disconnect device with remote emergency stop function according to any one of claims 1-5, characterized in that, The electrical connection cut-off device further comprises an emergency stop switch, the emergency stop switch is connected in parallel with the relay, and the emergency stop switch is used for controlling the grid-connected circuit breaker to change from the conducting state to the open state.

8. The electrical connection disconnect device with remote emergency stop function according to claim 7, characterized in that, The emergency stop switch comprises a second contact switch, when the second contact switch changes from a normally open state to a closed state, the grid-connected circuit breaker changes from the conducting state to the open state.

9. An energy management system, characterized by The electrical connection cut-off device with remote emergency stop function comprises: The electrical connection cut-off device with remote emergency stop function according to any one of claims 1-8; An energy storage device, the energy storage device is connected with the electrical connection cut-off device.

10. The energy management system of claim 9, wherein, The energy management system further comprises a monitoring module, the monitoring module is electrically connected with the EMS controller of the electrical connection cut-off device.

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