Energy storage cabinet safe ventilation monitoring system and monitoring method

Abstract

The invention discloses an energy storage cabinet safety ventilation monitoring system and monitoring method. The monitoring system comprises a dangerous case monitoring assembly, a safety ventilation assembly, a programming monitoring module, a safety isolation gate and a safety relay. The monitoring method comprises the steps that the programming monitoring module receives detection data sent back by the dangerous case monitoring assembly, judges whether the dangerous case state is controllable or not, and starts exhaust operation or closes exhaust operation; and the programming monitoring module continuously receives the operation data returned by the safety ventilation assembly, gives an alarm operation aiming at an abnormal state, and disconnects the alternating current contactor to cut off the power supply of the whole system. The internal state of the energy storage cabinet is monitored through the dangerous case detection assembly, the operation state of the draught fan is monitored in real time through the sensor, the motion state of the electric push rod is monitored through the microswitch, the programming monitoring module and the safety ventilation assembly can be separated through the safety isolation fence and the safety relay, an alarm is given when a fault occurs, and the safety of the energy storage cabinet is guaranteed. And control can be carried out through a manual control button, so that the fire risk is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage cabinets, and in particular to a safety ventilation monitoring system and a monitoring method for an energy storage cabinet. Background Art

[0002] As a device that can store electrical energy, the core function of the energy storage cabinet is to be widely used in power systems, renewable energy systems and backup power systems through components such as battery packs, inverters, and control chips. It can store electrical energy when the power supply is sufficient and release electrical energy when demand peaks or power is insufficient, thereby meeting the needs of various application scenarios.

[0003] The cause of fire in energy storage cabinets is often caused by thermal runaway reactions inside a battery cell or several battery cells. The heat released by the reaction-induced combustion will cause thermal runaway of adjacent batteries one after another, and then induce a thermal runaway chain propagation effect inside the module, causing the scale of the fire to expand and spread rapidly in a short period of time. During this period, flammable and toxic and harmful gases will be released, affecting the escape of people in the fire scene and fire rescue, and it is very easy to cause more serious accident damage. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a safety ventilation monitoring system and a monitoring method for an energy storage cabinet.

[0006] In order to achieve the above objectives, in a first aspect, the present invention provides a safety ventilation monitoring system for an energy storage cabinet, comprising:

[0007] Danger monitoring components, including temperature detectors, combustible gas detectors and smoke detectors, are used to monitor the smoke and combustible gas concentrations in the energy storage cabinet in real time;

[0008] A safety ventilation component, which includes a fan, an electric push rod and shutters. The fan is provided with a sensor, and the electric push rod is provided with a micro switch. The safety ventilation component is used to control the air intake and ventilation in the energy storage cabinet and discharge combustible gas before a dangerous situation occurs;

[0009] A programming monitoring module is used to receive detection data transmitted by the danger monitoring component, send out a control signal to drive the safety ventilation component and receive operation status data of the safety ventilation component.

[0010] In some embodiments, the programming monitoring module is electrically connected to the hazard monitoring component via a safety isolation fence, the programming monitoring module is electrically connected to the safety ventilation component via a safety relay, and the programming monitoring module is provided with a power supply wiring port, a control signal wiring port, a signal transmission port and a customization port.

[0011] In some of the embodiments, the fan is an axial flow fan, the sensor is a vibration velocity sensor, and the sensor is used to detect the operating status of the fan.

[0012] In some embodiments, the micro switch adopts a switch signal feedback switch, and the micro switch is used to detect the switch state of the electric push rod.

[0013] In some of the embodiments, the safety ventilation assembly is further provided with a manual control button, and the manual control button is used to manually switch the safety ventilation assembly on and off.

[0014] In a second aspect, the present invention further provides a method for monitoring safe ventilation of an energy storage cabinet, which is performed by the energy storage cabinet safe ventilation monitoring system as described in the first aspect, and the monitoring method steps include:

[0015] S1, the programming monitoring module continuously receives the detection data sent back by the temperature sensor, combustible gas detector and smoke detector in the dangerous situation monitoring component (1) in the energy storage cabinet, determines whether the dangerous situation inside the energy storage cabinet is controllable, and sends a control signal to control the safety ventilation component to start the exhaust operation or shut down the exhaust operation;

[0016] S2, the programming monitoring module continuously receives the operating data sent back by the safety ventilation component, determines the working status of the safety ventilation component, and issues an alarm operation for abnormal status;

[0017] S3, disconnect the AC contactor to disconnect the power supply of the entire system.

[0018] In some embodiments, after the danger monitoring component detects the occurrence of a danger, the safety ventilation component is activated under the condition that any one of the following three conditions is met:

[0019] A heat detector detects a rise in temperature; or

[0020] The smoke detector detects an increase in smoke levels; or

[0021] The combustible gas detector detected an increase in the concentration of combustible gas.

[0022] In some embodiments, after the safety ventilation component is started, the programming monitoring module detects and determines the operating status of the fan through a sensor, and the programming monitoring module detects and determines the switching status of the electric push rod through a micro switch. The operating status of the fan and the electric push rod includes normal, faulty and power off.

[0023] In some embodiments, after the programming monitoring module receives the start signal of the fan and then receives the vibration signal of the sensor, if the vibration frequency is within a set range, the programming monitoring module determines that the working state of the fan is normal and outputs a normal working signal;

[0024] After the programming monitoring module receives the start signal of the fan and the vibration signal of the sensor, if the vibration frequency is outside the set range, the programming monitoring module determines that the working state of the fan is abnormal and outputs an abnormal alarm signal.

[0025] In some embodiments, after the programming monitoring module receives the start signal of the electric push rod and the in-position signal of the micro switch, the programming monitoring module determines that the working state of the electric push rod is normal and outputs a normal working signal;

[0026] After the programming monitoring module receives the start signal of the electric push rod but does not receive the in-position signal of the micro switch, the programming monitoring module determines that the working state of the electric push rod is normal and outputs an abnormal alarm signal;

[0027] The programming monitoring module does not receive the start signal of the electric push rod and outputs a power-off alarm signal.

[0028] The present invention has the following beneficial effects:

[0029] The present invention monitors the internal state of the energy storage cabinet through multiple groups of detectors of the dangerous situation detection component, controls the start-up of the safety ventilation component through the programming monitoring module when a dangerous situation occurs, monitors the operating state of the fan in real time through the sensor, monitors the movement state of the electric push rod through the micro switch, and can separate the programming monitoring module and the safety ventilation component through the safety isolation fence and the safety relay. When the safety ventilation component fails, it displays and alarms, and can be controlled by a manual control button, effectively reducing the risk of fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the energy storage cabinet safety ventilation monitoring system proposed by the present invention;

[0031] Figure 2 This is a flow chart of the energy storage cabinet safety ventilation monitoring method proposed by the present invention.

[0032] Legend:

[0033] 1. Danger monitoring component; 11. Temperature detector; 12. Combustible gas detector; 13. Smoke detector; 2. Safety ventilation component; 21. Fan; 211. Sensor; 22. Electric push rod; 221. Micro switch; 23. Shutter; 24. Manual control button; 3. Programming monitoring module; 31. Power supply wiring port; 32. Control signal wiring port; 33. Signal transmission port; 34. Customized port; 4. Safety isolation fence; 5. Safety relay. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Please refer to the following examples for details:

[0036] Reference Figure 1 The present invention provides an embodiment of a safety ventilation monitoring system for an energy storage cabinet, and the specific structure includes: a danger monitoring component 1, a safety ventilation component 2, a programming monitoring module 3, a safety isolation fence 4 and a safety relay 5. Among them, the danger monitoring component 1 is used to monitor the smoke and combustible gas concentration in the energy storage cabinet in real time; the safety ventilation component 2 is used to control the air intake and ventilation in the energy storage cabinet, and discharge the combustible gas before the danger occurs; the programming monitoring module 3 is used to receive the detection data transmitted by the danger monitoring component 1, send a control signal to drive the safety ventilation component 2 and receive the operation status data of the safety ventilation component 2.

[0037] Please continue reading Figure 1 , the hazard monitoring includes a temperature detector 11, a combustible gas detector 12 and a smoke detector 13. Among them, during the early warning of fire, when the ambient temperature rises sharply, the temperature detector 11 will trigger an alarm, the combustible gas detector 12 is used to detect the concentration of combustible gas in the energy storage cabinet, and the smoke alarm is used to detect the concentration of smoke in the energy storage cabinet to prevent explosions or fires caused by gas leakage.

[0038] Specifically, the combustible gas detector 12 sets two levels of alarm thresholds, namely, the first level threshold is 10%LEL, and the second level threshold is 20%LEL. When the combustible gas concentration is between 0%LEL and 10%LEL, the programming monitoring module 3 will first disconnect the DC contactor, stop the charging and discharging operation, and then start the safety ventilation component 2 for ventilation; when the combustible gas concentration is between 10%LEL and 20%LEL, the programming monitoring module 3 will increase the exhaust action of the safety ventilation component 2; when the combustible gas concentration is above 20%LEL or drops back to 0%LEL, the programming monitoring module 3 will close the safety ventilation component 2.

[0039] Please continue reading Figure 1 The safety ventilation assembly 2 includes a fan 21, an electric push rod 22 and a shutter 23. The fan 21 is provided with a sensor 211 for detecting the operating state of the fan 21; the electric push rod 22 is provided with a micro switch 221 for detecting the operating switch state of the electric push rod 22; the safety ventilation assembly 2 is also provided with a manual control button 24 for manually switching the safety ventilation assembly 2.

[0040] Among them, the fan 21 adopts an axial flow fan 21. A small axial flow fan, a medium axial flow fan and a large axial flow fan can be selected according to the space size of the energy storage cabinet and the type of use environment. The fan speed, ventilation volume, wind pressure, operating power and other operating parameters can be controlled by adjusting the PWM (pulse width modulation) signal or voltage through the programming monitoring module 3, so as to achieve the purpose of energy saving and noise reduction.

[0041] In addition, the sensor 211 uses a vibration velocity sensor 211, which is an inertial sensor 211. The working principle is based on magnetoelectric induction. An inertial mass block is arranged inside the sensor 211. When the external structure vibrates, the inertial effect causes the mass block to displace relative to the sensor 211 housing, which can convert the mechanical vibration into an electrical signal output. Due to the non-contact measurement, wear is reduced and long-term stability and reliability are improved.

[0042] In addition, the micro switch 221 uses a switch signal feedback switch (such as a limit switch, a micro switch 221, a Hall effect sensor 211, etc.) to detect the switch state of the electric push rod 22. The switch quantity here refers to a signal with only two states - on or off, 1 or 0, high level or low level, which is often used to represent the binary working state of the device. The micro switch 221 will send a signal when the electric push rod 22 reaches a predetermined position or completes a specific action, and feedback the current position or action completion information, that is, only provide "in place" or "not in place" status information, but do not provide continuously changing analog signals, ensuring the reliability of the system and the accuracy of automatic control.

[0043] Please continue reading Figure 1 The programming monitoring module 3 and the dangerous situation monitoring component 1 are electrically connected through the safety isolation fence 4. The electrical isolation between the input and output signals is achieved through contactless technology such as optocouplers or transformers, preventing the formation of ground loops and ground loop currents, and reducing electromagnetic interference; and the voltage and current transmitted to the dangerous area through the safety fence can be limited to ensure that even in a fault state, there will not be enough energy to cause an explosion; it can also support bidirectional transmission of digital signals, such as HART, PROFIBUS, FOUNDATION Fieldbus and other bus protocols, while maintaining safety isolation and energy limitation. By using the safety isolation fence 4, electrical isolation can be provided and energy can be limited to protect the safety of personnel and equipment.

[0044] In addition, the programming monitoring module 3 is electrically connected to the safety ventilation component 2 through the safety relay 5, which can continuously monitor its own status, including the contact status, coil function and internal circuit, to ensure that the actions of the normally open and normally closed contacts of the relay are mechanically linked, and cannot be closed or opened at the same time even under extreme conditions. Once an abnormality is detected, it will automatically enter a safe state. Therefore, the design can ensure that even if a single fault occurs, the relay can remain in a safe state, which is the so-called "single point fault safety"; it also integrates a microprocessor, which can provide programmable functions and detailed fault diagnosis information, facilitating system maintenance and troubleshooting.

[0045] Please continue reading Figure 1 The programming and monitoring module 3 adopts a safe programmable logic controller, which provides detailed fault diagnosis information and operation records, which is helpful for maintenance and troubleshooting, and meets the traceability requirements of regulations. Through redundant design, self-diagnosis function and fault isolation technology, it can ensure that even if part of the system fails, it can maintain a safe state; support safety communication protocols such as PROFIsafe, Ethernet / IP Safety, SERCOS III Safety, etc., to ensure the security of data transmission, and can add I / O modules, safety function modules, etc. according to specific application requirements, and flexibly expand system functions.

[0046] Furthermore, the programming monitoring module 3 is provided with a power supply wiring port 31 , a control signal wiring port 32 , a signal transmission port 33 and a customization port 34 , so as to facilitate the monitoring of the safety ventilation component 2 .

[0047] Specifically, the power supply wiring port 31 includes a 220V input port, a 24V input port, a 220 output port (for powering the fan 21) and a 24V output port (for powering the electric push rod 22); the control signal wiring port 32 includes a switch input signal port and a switch output signal port; the signal transmission port 33 includes a MODBUS RTU output signal port; the custom port 34 includes a reserved signal port, which can support user-defined functions.

[0048] Reference Figure 2 The present invention further provides an embodiment of a method for monitoring safe ventilation of an energy storage cabinet, which is executed by the energy storage cabinet safe ventilation monitoring system in the above embodiment, and the monitoring method steps include:

[0049] S1, the programming monitoring module 3 continuously receives the detection data sent back by the temperature detector 11, the combustible gas detector 12 and the smoke detector 13 in the dangerous situation monitoring component 1 in the energy storage cabinet, determines whether the dangerous situation inside the energy storage cabinet is controllable, and sends a control signal to control the safety ventilation component 2 to start the exhaust operation or shut down the exhaust operation;

[0050] S2, the programming monitoring module 3 continuously receives the operating data sent back by the safety ventilation component 2, determines the working state of the safety ventilation component 2, and issues an alarm operation for abnormal states;

[0051] S3, disconnect the AC contactor to disconnect the power supply of the entire system.

[0052] Further, after the danger monitoring component 1 detects the occurrence of a danger, the safety ventilation component 2 is activated under the condition that any one of the following three conditions is met:

[0053] The temperature sensor 11 detects a temperature rise; or

[0054] The smoke detector 13 detects a rise in smoke concentration; or

[0055] The combustible gas detector 12 detects a rise in the combustible gas concentration.

[0056] It should be explained in detail that after the safety ventilation component 2 is started, the programming monitoring module 3 detects and determines the operating status of the fan 21 through the sensor 211, and the programming monitoring module 3 detects and determines the switching status of the electric push rod 22 through the micro switch 221. The operating status of the fan 21 and the electric push rod 22 includes normal, faulty and power off.

[0057] In addition, the programming monitoring module 3 controls the safety ventilation component 2 to first perform self-reset when powered on, and then start the self-test program according to the set period (for example, a 10-minute self-test every 20 days).

[0058] For example:

[0059] After the programming monitoring module 3 receives the start signal of the fan 21 and the vibration signal of the sensor 211, if the vibration frequency is within the set range, the programming monitoring module 3 determines that the working state of the fan 21 is normal and outputs a normal working signal;

[0060] After the programming monitoring module 3 receives the start signal of the fan 21 and the vibration signal of the sensor 211, if the vibration frequency is outside the set range, the programming monitoring module 3 determines that the working state of the fan 21 is abnormal and outputs an abnormal alarm signal;

[0061] The programming monitoring module 3 does not receive the start signal of the fan 21 and outputs a power failure alarm signal.

[0062] After receiving the start signal of the electric push rod 22 and the in-position signal of the micro switch 221, the programming monitoring module 3 determines that the working state of the electric push rod 22 is normal and outputs a normal working signal;

[0063] After the programming monitoring module 3 receives the start signal of the electric push rod 22 but does not receive the in-position signal of the micro switch 221, the programming monitoring module 3 determines that the working state of the electric push rod 22 is normal and outputs an abnormal alarm signal;

[0064] The programming monitoring module 3 does not receive the start signal of the electric push rod 22 and outputs a power failure alarm signal.

[0065] It should be noted that the average failure probability of each component and module in this system is:

[0066]

[0067] Among them, λ is the failure rate, TI is the functional test interval;

[0068] The average failure probability of the safety instrument loop is:

[0069] PFDSIF=PFD 传感器 +PFD 控制模块 +PFD 通风组件

[0070] Through the above technical scheme, the present application monitors the internal state of the energy storage cabinet through multiple groups of detectors of the dangerous situation detection component, controls the start-up of the safety ventilation component 2 through the programming monitoring module 3 when a dangerous situation occurs, monitors the operating state of the fan 21 in real time through the sensor 211, monitors the movement state of the electric push rod 22 through the micro switch 221, and can separate the programming monitoring module 3 and the safety ventilation component 2 through the safety isolation fence 4 and the safety relay 5. When the safety ventilation component 2 fails, it will display and alarm, and can be controlled by the manual control button 24, effectively reducing the risk of fire.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety ventilation monitoring system for energy storage cabinets, characterized in that: include: A hazard monitoring component (1), the hazard monitoring comprising a temperature detector (11), a combustible gas detector (12) and a smoke detector (13), the hazard monitoring component (1) being used for real-time monitoring of smoke and combustible gas concentrations in the energy storage cabinet; A safety ventilation assembly (2), the safety ventilation assembly (2) comprising a fan (21), an electric push rod (22) and a shutter (23), the fan (21) being provided with a sensor (211), the electric push rod (22) being provided with a micro switch (221), the safety ventilation assembly (2) being used to control air intake and ventilation in the energy storage cabinet, and to discharge combustible gas in the early stage of a dangerous situation; A programming monitoring module (3) is used to receive detection data transmitted by the danger monitoring component (1), send a control signal to drive the safety ventilation component (2), and receive operating status data of the safety ventilation component (2).

2. The energy storage cabinet safety ventilation monitoring system according to claim 1, characterized in that: The programming monitoring module (3) is electrically connected to the danger monitoring component (1) via a safety isolation fence (4), and the programming monitoring module (3) is electrically connected to the safety ventilation component (2) via a safety relay (5). The programming monitoring module (3) is provided with a power supply wiring port (31), a control signal wiring port (32), a signal transmission port (33) and a customization port (34).

3. The energy storage cabinet safety ventilation monitoring system according to claim 1 is characterized in that: The fan (21) is an axial flow fan (21), the sensor (211) is a vibration speed sensor (211), and the sensor (211) is used to detect the operating state of the fan (21).

4. The energy storage cabinet safety ventilation monitoring system according to claim 1, characterized in that: The micro switch (221) adopts a switch quantity signal feedback switch, and the micro switch (221) is used to detect the switch state of the electric push rod (22).

5. The energy storage cabinet safety ventilation monitoring system according to claim 1, characterized in that: The safety ventilation component (2) is also provided with a manual control button (24), and the manual control button (24) is used to manually open and close the safety ventilation component (2).

6. A method for monitoring safe ventilation of an energy storage cabinet, characterized in that: The monitoring method is performed via the energy storage cabinet safety ventilation monitoring system according to any one of claims 1 to 5, and the monitoring method steps include: S1, the programming monitoring module (3) continuously receives the detection data sent back by the temperature sensor (11), the combustible gas detector (12) and the smoke detector (13) in the dangerous situation monitoring component (1) in the energy storage cabinet, determines whether the dangerous situation inside the energy storage cabinet is controllable, and sends a control signal to control the safety ventilation component (2) to start the exhaust operation or shut down the exhaust operation; S2, the programming monitoring module (3) continuously receives the operating data sent back by the safety ventilation component (2), determines the working state of the safety ventilation component (2), and issues an alarm operation for abnormal states; S3, disconnect the AC contactor to disconnect the power supply of the entire system.

7. A method for monitoring safe ventilation of an energy storage cabinet according to claim 6, characterized in that: After the danger monitoring component (1) detects the occurrence of a danger, the safety ventilation component (2) is activated under the condition that any one of the following three conditions is met: The temperature sensor (11) detects a temperature rise; or The smoke detector (13) detects a rise in smoke concentration; or The combustible gas detector (12) detects an increase in the concentration of combustible gas.

8. A method for monitoring safe ventilation of an energy storage cabinet according to claim 6, characterized in that: After the safety ventilation component (2) is started, the programming monitoring module (3) detects and determines the operating state of the fan (21) through the sensor (211), and the programming monitoring module (3) detects and determines the switch state of the electric push rod (22) through the micro switch (221). The operating states of the fan (21) and the electric push rod (22) include normal, faulty and power-off.

9. A method for monitoring safe ventilation of an energy storage cabinet according to claim 8, characterized in that: After the programming monitoring module (3) receives the start signal of the fan (21) and the vibration signal of the sensor (211), if the vibration frequency is within a set range, the programming monitoring module (3) determines that the working state of the fan (21) is normal and outputs a normal working signal; After the programming monitoring module (3) receives the start signal of the fan (21) and the vibration signal of the sensor (211), if the vibration frequency is outside a set range, the programming monitoring module (3) determines that the working state of the fan (21) is abnormal and outputs an abnormal alarm signal.

10. A method for monitoring safe ventilation of an energy storage cabinet according to claim 8, characterized in that: After the programming monitoring module (3) receives the start signal of the electric push rod (22) and the in-position signal of the micro switch (221), the programming monitoring module (3) determines that the working state of the electric push rod (22) is normal and outputs a normal working signal; After the programming monitoring module (3) receives the start signal of the electric push rod (22) but does not receive the position signal of the micro switch (221), the programming monitoring module (3) determines that the working state of the electric push rod (22) is normal and outputs an abnormal alarm signal; The programming monitoring module (3) does not receive the start signal of the electric push rod (22) and outputs a power failure alarm signal.

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