A distributed energy storage system and its control method

Abstract

The present invention discloses a distributed energy storage system and its control method, including an electrical energy storage cabinet body distributed in the energy storage unit. Inside the battery storage rack, there is a heat dissipation pipeline connected to the heat exchange mechanism. Along the vertical direction on the upper end surface of the battery storage rack, there are vertical grooves communicating and penetrating through the heat dissipation pipeline, and on the inner side wall of the vertical grooves, there are positioned fire extinguishing holes located above the battery cells. Inside the vertical grooves, there are vertical plates inserted movably, and on the inner side of the vertical plates, an air vent assembly and an outward pushing assembly are arranged successively from top to bottom. The heat dissipation pipeline can introduce the cooling air discharged by the heat exchange mechanism onto the battery cells for heat dissipation. The fire extinguishing gas discharged by the heptafluoropropane fire protection system passes through the fire protection air duct, step air holes, and positioned fire extinguishing holes in sequence and is discharged into the space where the faulty battery cell is located. After the fireproof metal net loses its fixation, it turns downwards and conducts fire protection coverage on the outer side surface of the faulty battery cell, so as to conduct timely and precise positioned fire extinguishing after an open fire occurs due to a thermal fault in the battery cell.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage systems, and particularly relates to a distributed energy storage system and a control method thereof. Background Art

[0002] The distributed energy storage system is mainly divided into two parts, an electrical energy storage unit and an energy storage configuration facility. It can be built on the user side or the energy supply side to provide energy storage services for a multi-energy complementary energy system. Distributed energy storage refers to storing energy through photovoltaic, wind power in green energy or electricity in the power grid. The stored energy can be electricity, heat, cold, potential energy, etc. The energy storage device discharges during peak load periods and charges from the power grid during off-peak load periods, reducing peak load demand, thus improving the load characteristics and participating in the system peak shaving. The distributed energy storage system can be realized through an energy storage container. For example, the energy storage container organically integrates devices such as batteries into a 20-foot container unit. There are a total of 6 battery cabinets, among which 2 battery cabinets form a 576V 296Ah system, and the other 4 cabinets form a 576V 592Ah system. The two systems are independent of each other, and the total capacity is about 510 kWh. In addition, the unit has a battery system, a temperature control system, a fire protection system, a lighting system, and a ventilation system to ensure a stable working environment. The fire protection system usually consists of a configured heptafluoropropane fire protection system, which can provide better fire extinguishing protection for the fire of the electrical energy storage.

[0003] For example, the Chinese patent with the publication number CN114520385A discloses a distributed energy storage system, including a plurality of energy storage cabinets and an independently arranged heat exchange device. Each of the energy storage cabinets is provided with an energy storage device and a heat exchange channel. The heat exchange device is provided with an interface component, and the heat exchange channels of each energy storage cabinet are connected in parallel to the interface component. The heat exchange device provides a heat exchange medium to each heat exchange channel through the interface component.

[0004] Another example is the Chinese patent with the publication number CN114520385A, which discloses an electro-chemical energy storage safety warning system, including an optical fiber located in an energy storage battery, a control host for emitting incident light to the optical fiber and demodulating the scattered signal of the optical fiber, a battery management system for emitting an alarm signal according to the demodulation signal of the control host, and further including a battery switch and a fire extinguishing system connected to the battery management system; by monitoring the temperature and pressure of each battery cell in a large-scale electro-chemical energy storage system, when an abnormal condition occurs in a certain battery cell in the energy storage system, this warning system can sense it in the first time and accurately give the specific location where the cell is located, so as to effectively contain it at the initial stage when the energy storage system is in danger and avoid greater losses caused by untimely discovery.

[0005] However, the above solutions have the following deficiencies: A patent for a distributed energy storage system with the publication number CN114520385A only makes technical improvements to the installation position of the heat exchange device on the energy storage cabinet. However, for the core electrical energy storage unit inside the energy storage cabinet, the battery monomers inside the core electrical energy storage unit are usually arranged closely, and there are differences in the electrochemical parameters between different battery monomers, such as slight differences in internal resistance, voltage, etc. When these battery monomers form an energy storage system and undergo long-term charge and discharge cycles, especially when the heat dissipation environment of the battery monomers is poor, the difference problem between the battery monomers will become more obvious, easily triggering a thermal runaway reaction inside the battery. Organic substances such as diaphragms and electrolytes in the battery release gases such as H2 and CO through thermal decomposition and are extremely easy to be ignited to produce an open flame. Since the above heat exchange device is for the overall space inside the energy storage cabinet and cannot dissipate heat specifically for each battery monomer, after a thermal failure occurs in the battery monomer, it is more likely to produce an open flame due to untimely heat dissipation. And an electro-chemical energy storage safety warning system introduced in a Chinese patent with the publication number CN114520385A, although it realizes abnormal alarm by monitoring the temperature and pressure of each battery monomer, the fire extinguishing system does not separately set a precise positioning fire extinguishing device for the open flame generated by the battery with a thermal failure, resulting in untimely fire extinguishing.

[0006] How to facilitate targeted heat dissipation for the battery monomers on the energy storage cabinet in the distributed energy storage system and at the same time be able to accurately and timely locate and extinguish the fire after an open flame occurs due to a thermal failure of the battery monomer is a problem that needs to be solved currently. Summary of the Invention

[0007] The purpose of the present invention is to provide a distributed energy storage system and its control method to solve the problems existing in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A distributed energy storage system includes an electrical energy storage cabinet body distributed in the energy storage unit. Inside the electrical energy storage cabinet body, a battery storage rack and a heat exchange mechanism are respectively arranged. Battery monomers are arranged on the battery storage rack, and a monitoring mechanism is arranged on the battery storage rack and used for monitoring the state of the battery monomers. Inside the battery storage rack, a partition group is arranged and used to separate adjacent battery monomers. A heat dissipation pipeline connected to the heat exchange mechanism is arranged on the corresponding wall surface at the rear side of the battery monomers inside the battery storage rack. A reset blocking plate is movably arranged inside the heat dissipation pipeline;

[0010] On the upper end face of the battery storage rack, vertical grooves communicating through the heat dissipation pipes are arranged vertically, and positioning fire extinguishing holes located above the battery cells are communicatively arranged on the inner side walls of the vertical grooves. A vertical plate is movably inserted into the vertical grooves. An electric telescopic member is arranged between the top of the vertical plate and the electric energy storage cabinet body, and both the electric telescopic member and the monitoring mechanism are connected to the integrated control end of the electric energy storage cabinet body. A fire fighting air duct is arranged inside the vertical plate and is connected to the gas outlet side of the heptafluoropropane fire fighting system on the electric energy storage cabinet body. An air venting assembly and an outward pushing assembly are sequentially arranged from top to bottom on the inner side part of the vertical plate. When the monitoring mechanism detects an abnormality of the battery cell, the outward pushing assembly and the electric telescopic member cooperate to push the reset plugging plate in the corresponding heat dissipation pipe of the battery cell to perform airtight sealing. At the same time, when the reset plugging plate completely closes the corresponding heat dissipation pipe, the outward pushing assembly drives the air venting assembly to connect the fire fighting air duct with the adjacent positioning fire extinguishing hole and discharge the fire extinguishing gas.

[0011] Preferably, the heat exchange mechanism includes a heat exchange and cooling air conditioner body, which is composed of a compressor, a condenser, a throttle valve and an evaporator air conditioning system. The monitoring mechanism is composed of detectors for temperature, position and stress arranged in each battery cell storage part on the battery storage rack.

[0012] Preferably, the partition group is formed by the cross intersection of horizontal and vertical partitions, and air venting channels are evenly arranged on both side walls of the vertical partitions. A reset groove is arranged at the top end of the inner wall of the heat dissipation pipe, and an upper reset spring sleeve rod is arranged inside the reset groove and is connected to the reset plugging plate. The upper reset spring sleeve rod moves the reset plugging plate upward to make the heat dissipation pipe in a through state.

[0013] Preferably, the electric telescopic member is composed of an electric push rod. Step air holes are arranged on the inner side wall of the fire fighting air duct. The air venting assembly includes a return spring sleeve rod arranged horizontally along the inner step part of the step air hole, and a plug head frame is movably arranged on the air inlet side of the step air hole. The return spring sleeve rod slides through a preset hole on the plug head frame. A connecting air outlet head is arranged on the outside of the plug head frame. When the plug head frame is completely separated from the air inlet side of the step air hole, the connecting air outlet head is hermetically connected to the positioning fire extinguishing hole.

[0014] Preferably, accommodation cavities are equidistantly arranged vertically inside the vertical plate. The outward pushing assembly includes electromagnet blocks arranged inside the accommodation cavities. The control ends of the electromagnet blocks are connected to the integrated control end of the electric energy storage cabinet body. Step locking holes are arranged on the side walls of the accommodation cavities. An outward pushing spring sleeve rod is slidably inserted into the step locking holes. Magnetic receiving plates and pressing blocks are respectively arranged at the inner and outer ends of the outward pushing spring sleeve rod. A linkage groove located below the step air hole is arranged on the inner top wall of the accommodation cavity. The upper part of the magnetic receiving plate extends into the linkage groove, and a magnetic attracting block is arranged at the lower part of the plug head frame.

[0015] Preferably, a pressure receiving plate is provided on the side of the reset sealing plate. When the power supply end of the electromagnet block is in an off state, the outer push spring sleeve rod pushes the pressing block to move outwards above the pressure receiving plate, and the telescopic end of the electric telescopic member drives the vertical plate to move downwards, so that the reset sealing plate hermetically seals the heat dissipation pipeline. At the same time, the outward movement of the magnetic receiving plate drives the magnetic attracting block on the plug head frame to slowly move outwards against the return spring sleeve rod, so that the plug head frame is separated from the air inlet side of the stepped air hole, and the air outlet head is hermetically communicated with the positioning fire extinguishing hole;

[0016] When the power supply end of the electromagnet block is in a closed state, when the electromagnet block works, the magnetic receiving plate drives the pressing block to be received in the stepped locking hole, and the pressing block and the pressure receiving plate are in a misaligned and separated state. At the same time, the cooperation between the magnetic receiving plate and the magnetic attracting block drives the plug head frame to hermetically seal the air inlet end of the stepped air hole.

[0017] Preferably, a double-ear rotating shaft frame is arranged on the upper end surface of the battery storage rack. A fireproof metal mesh is wound and sleeved on the double-ear rotating shaft frame, and a fiberglass fireproof cloth is laid on the outer surface of the fireproof metal mesh. Magnetic strips are arranged on the side surface of the partition group. After the fireproof metal mesh is turned downwards, it can fireproofly cover the outer side surface of the lower battery monomer, and at the same time, the fireproof metal mesh is magnetically fixed through the magnetic strips.

[0018] Preferably, a fixing groove is provided at the bottom end surface of the double-ear rotating shaft frame, and a locking rod frame is arranged on the side of the telescopic end of the electric telescopic member. When the electric telescopic member drives the vertical plate to move downwards, the corresponding locking rod frame moves out of the fixing groove, so that the fireproof metal mesh loses its fixation and turns downwards.

[0019] A control method for the above-mentioned distributed energy storage system includes the following steps:

[0020] A. Connect the electric telescopic member, the monitoring mechanism, the power supply control end of the electromagnet block and the integrated control end of the electric energy storage cabinet body. Set the normal range value group of the detection values of the temperature, position and stress detectors in the monitoring mechanism as A. Connect the cooling air outlet side of the heat exchange mechanism to the heat dissipation pipeline, make the telescopic end of the electric telescopic member return to its original position, the heat dissipation pipeline is in a ventilation state, the power supply end of the electromagnet block is normally closed, and make the pressing block be received in the stepped locking hole;

[0021] B. Wind and sleeve the fireproof metal mesh on the double-ear rotating shaft frame, and the return of the telescopic end of the electric telescopic member makes the locking rod frame insert into the fixing groove to fix the fireproof metal mesh;

[0022] C. When the corresponding monitoring mechanism of the battery cell obtains that the temperature and stress values exceed the normal range value group A, the integrated control end on the electric energy storage cabinet body first controls the corresponding electromagnet block of the battery cell at the fault position to be in a power-off state, so that the pressing block moves outward to above the pressure receiving plate under the action of the outward pushing spring sleeve rod. At the same time, the telescopic end of the electric telescopic member moves downward to hermetically seal the heat dissipation pipeline at the fault position with the reset sealing plate. The outward movement of the magnetic receiving plate separates the plug head frame from the air inlet side of the stepped air hole through the cooperation of the magnetic attracting block, so that the connecting air outlet head is communicated with the corresponding positioning fire extinguishing hole. The fire extinguishing gas discharged by the heptafluoropropane fire protection system passes through the fire protection air duct, the stepped air hole and the positioning fire extinguishing hole in sequence and is discharged into the space where the faulty battery cell is located. At the same time, the downward movement of the telescopic end of the electric telescopic member causes the lock rod frame to move out of the fixed groove, so that the fireproof metal net loses its fixation and then turns down to provide fire protection coverage for the outer side of the faulty battery cell.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The heat dissipation pipeline can introduce the cooling air discharged by the heat exchange mechanism to the battery cell for heat dissipation. When the monitoring mechanism monitors that the battery cell has a thermal fault anomaly and generates an open flame, the integrated control end on the electric energy storage cabinet body first controls the corresponding electromagnet block of the battery cell at the fault position to be in a power-off state, so that the pressing block moves outward to above the pressure receiving plate under the action of the outward pushing spring sleeve rod. At the same time, the telescopic end of the electric telescopic member moves downward to hermetically seal the heat dissipation pipeline at the fault position with the reset sealing plate. The outward movement of the magnetic receiving plate separates the plug head frame from the air inlet side of the stepped air hole through the cooperation of the magnetic attracting block, so that the connecting air outlet head is communicated with the corresponding positioning fire extinguishing hole. The fire extinguishing gas discharged by the heptafluoropropane fire protection system passes through the fire protection air duct, the stepped air hole and the positioning fire extinguishing hole in sequence and is discharged into the space where the faulty battery cell is located. At the same time, the downward movement of the telescopic end of the electric telescopic member causes the lock rod frame to move out of the fixed groove, so that the fireproof metal net loses its fixation and then turns down to provide fire protection coverage for the outer side of the faulty battery cell. This is convenient for targeted heat dissipation of the battery cells on the electric energy storage cabinet body in the distributed energy storage system, and can also perform timely and accurate fire extinguishing when an open flame occurs due to a thermal fault in the battery cell. Description of the Drawings

[0025] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 2 is Figure 1 a left view partial schematic diagram of

[0027] Figure 3 is Figure 1 a partial omitted schematic diagram of

[0028] Figure 4 is Figure 3 a schematic diagram of the separated state structure of the plug head frame and the air inlet side of the stepped air hole of

[0029] Figure 5 For Figure 3 Schematic diagram of the closed state structure of the plug head frame and the stepped air hole intake side;

[0030] Figure 6 Schematic diagram of the partial structure of the battery storage rack of the present invention;

[0031] Figure 7 Schematic diagram of the partial sectional structure of the vertical plate of the present invention;

[0032] Figure 8 Schematic diagram of the reset plugging plate structure of the present invention;

[0033] Figure 9 Schematic diagram of the matching structure of the plug head frame and the connecting air outlet head of the present invention;

[0034] Figure 10 Schematic sectional view of the matching structure of the double-ear rotary shaft frame and the lock rod frame of the present invention.

[0035] In the figure: 1, electric energy storage cabinet; 2, battery storage rack; 3, battery cell; 4, partition group; 5, heat dissipation pipeline; 6, reset plugging plate; 7, vertical groove; 8, vertical plate; 9, electric telescopic member; 10, fire fighting air duct; 11, air duct groove; 12, reset groove; 13, upper reset spring sleeve rod; 14, stepped air hole; 15, return spring sleeve rod; 16, plug head frame; 17, connecting air outlet head; 18, accommodation cavity; 19, electromagnet block; 20, stepped locking hole; 21, outer push spring sleeve rod; 22, magnet receiving plate; 23, pressing block; 24, linkage groove; 25, magnetic attraction block; 26, pressure receiving plate; 27, double-ear rotary shaft frame; 28, fireproof metal net; 29, fiberglass fireproof cloth; 30, magnetic strip; 31, fixing groove; 32, lock rod frame; 101, positioning fire extinguishing hole; 201, installation groove. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] Please refer to Figures 1-10 , the present invention provides a technical solution:

[0038] Embodiment 1:

[0039] A distributed energy storage system includes an electrical energy storage cabinet 1 distributed in the energy storage unit. The electrical energy storage cabinet 1 can be based on the ES20M1 energy storage container produced by Shanghai Taiji Industry Co., Ltd. and adjusted adaptively. The electrical energy storage cabinet 1 can be selected according to the corresponding specifications and models according to the usage environment requirements. Inside the electrical energy storage cabinet 1, a battery storage rack 2 and a heat exchange mechanism are respectively arranged. The front end of the battery storage rack 2 has an opening. Battery cells 3 are arranged on the battery storage rack 2. And a monitoring mechanism is arranged on the battery storage rack 2 and is used for monitoring the state of the battery cells 3. A partition group 4 is arranged inside the battery storage rack 2 and is used to separate adjacent battery cells 3. A heat dissipation pipe 5 connected to the heat exchange mechanism is arranged on the corresponding wall surface at the rear side of the battery cells 3 inside the battery storage rack 2. A reset plugging plate 6 is movably arranged inside the heat dissipation pipe 5. The reset plugging plate 6 can control the opening and closing of the heat dissipation pipe 5 through adjustment;

[0040] Vertical grooves 7 communicating through the heat dissipation pipe 5 are arranged vertically on the upper end surface of the battery storage rack 2. Each vertical groove 7 corresponds to the battery cells 3 arranged longitudinally on the battery storage rack 2. And a positioning fire extinguishing hole 101 located above the battery cells 3 is communicatively arranged on the inner side wall of the vertical groove 7. The positioning fire extinguishing hole 101 is composed of a horizontal fire extinguishing hole and a vertical fire extinguishing hole. The horizontal fire extinguishing holes are distributed on the upper top wall inside the battery storage rack 2 where the battery cells 3 are placed. The vertical fire extinguishing holes communicate with the above-mentioned top wall, so that the fire extinguishing gas can be evenly distributed above the battery cells 3. A vertical plate 8 is movably inserted into the vertical groove 7. An electric telescopic member 9 is arranged between the top of the vertical plate 8 and the electrical energy storage cabinet 1. And both the electric telescopic member 9 and the monitoring mechanism are connected to the integrated control end of the electrical energy storage cabinet 1. The integrated control end is composed of a built-in PLC controller on the electrical energy storage cabinet 1. A fire fighting air duct 10 is arranged inside the vertical plate 8 and is connected to the gas outlet side of the heptafluoropropane fire fighting system on the electrical energy storage cabinet 1. The heptafluoropropane fire fighting system consists of three parts: a fire alarm system, a fire extinguishing control system and a heptafluoropropane fire extinguishing device. The fire alarm system is provided with two-way alarms of smoke and temperature and is controlled by a gas fire controller. The inner side of the vertical plate 8 is sequentially provided with a ventilation component and an outward pushing component from top to bottom. When the monitoring mechanism monitors an abnormality of the battery cells 3, the outward pushing component and the electric telescopic member 9 cooperate to push the reset plugging plate 6 in the corresponding heat dissipation pipe 5 of the battery cells 3 to seal airtightly. At the same time, when the reset plugging plate 6 completely closes the corresponding heat dissipation pipe 5, the outward pushing component drives the ventilation component to connect the fire fighting air duct 10 and the adjacent positioning fire extinguishing hole 101 and discharge the fire extinguishing gas.

[0041] Embodiment 2:

[0042] On the basis of Embodiment 1, it is further described that the heat exchange mechanism includes a heat exchange and cooling air conditioner body, which is composed of a compressor, a condenser, a throttle valve, and an evaporator air conditioning system. When the heat exchange mechanism works, it can continuously discharge cooling gas into the heat dissipation pipe 5 for cooling. The monitoring mechanism is composed of detectors that are not shown and are used to detect the temperature, position, and stress of each battery cell 3 storage part on the battery storage rack 2. Specifically, it is composed of a temperature detection sensor, a position sensor, and a pressure detection sensor. The temperature detection sensor can monitor the outer surface temperature of adjacent battery cells 3. The position sensor can locate the installation position of each battery cell 3, which is convenient for quickly locating and searching in case of a fault fire. At the same time, an indicator light is integrated on the position sensor. When the battery cell 3 is in a normal state, the indicator light is green. When the battery cell 3 fails, the indicator light is red, which is convenient for the operator to quickly find the faulty battery cell 3. The pressure detection sensor can be detected when the battery cell 3 fails and bulges, and is set on the installation surface on the side where the battery cell 3 is prone to bulge, which is convenient for detection.

[0043] Embodiment 3:

[0044] On the basis of Embodiment 1, it is further described that the partition group 4 is formed by the cross-intersection of horizontal and vertical partitions. A wire port is preset in the front part of the side wall of the vertical partition. The wire connection between adjacent battery cells 3 is realized through the wire port. At the same time, Teflon fire-proof tape is wound around the outer surface of the wire at the wire port for fire prevention. And ventilation channel grooves 11 are evenly arranged on both side walls of the vertical partition. The setting of the ventilation channel grooves 11 facilitates the flow of heat exchange and cooling gas on the battery storage rack 2. At the top end of the inner wall of the heat dissipation pipe 5, a reset groove 12 is provided. An upper reset spring sleeve rod 13 is arranged inside the reset groove 12 and is connected to the reset sealing plate 6. The upper reset spring sleeve rod 13 generates an upward spring force on the reset sealing plate 6. At the same time, installation grooves 201 are symmetrically arranged on the upper end face of the reset sealing plate 6. The bottom of the upper reset spring sleeve rod 13 is inserted into the installation groove 201, which is convenient for the vertical movement of the reset sealing plate 6 in the reset groove 12. The upper reset spring sleeve rod 13 moves the reset sealing plate 6 upward to make the heat dissipation pipe 5 in a through state.

[0045] Embodiment 4:

[0046] On the basis of the first embodiment, it is further described that the electric telescopic member 9 is composed of an electric push rod. The electric push rod can select the corresponding specification electric push rod produced by Wenzhou Longwan Haibin Mingfeng Machinery according to the size of the battery storage rack 2. Step air holes 14 are arranged on the inner side wall of the fire airway 10. The number of the step air holes 14 is set according to the number of battery monomers 3 in the box. The ventilation assembly includes a return spring sleeve rod 15 arranged horizontally along the inner step of the step air hole 14. A plug head frame 16 is movably arranged on the intake side of the step air hole 14. A rubber sleeve with a thickness of 1 mm is bonded to the outer surface of the plug head frame 16 to improve the airtight effect. The cross section of the plug head frame 16 is a conical structure, and a preset hole is arranged at the edge of the side wall of the plug head frame 16. The preset hole is arranged horizontally. The return spring sleeve rod 15 slides through the preset hole on the plug head frame 16. A connecting air outlet head 17 is arranged outside the plug head frame 16. The plug head frame 16 and the connecting air outlet head 17 are fixedly connected by two symmetric rib plates. The connecting air outlet head 17 is a funnel-shaped structure and is made of elastic rubber. The side wall of the connecting air outlet head 17 is designed with openings for the discharge of the inflowing cooling gas. When the plug head frame 16 is completely separated from the intake side of the step air hole 14, the connecting air outlet head 17 is hermetically connected to the positioning fire extinguishing hole 101. During the process of the connecting air outlet head 17 moving to the intake side of the positioning fire extinguishing hole 101, the connecting air outlet head 17 will undergo elastic extrusion and contraction;

[0047] Accommodation cavities 18 are equidistantly arranged vertically inside the vertical plate 8. The outer pushing assembly includes an electromagnet block 19 arranged inside the accommodation cavity 18. The electromagnet block 19 is of the HX-P80 / 80 type produced by Wenzhou Huaxiang Electric Appliance Technology Co., Ltd. The electromagnet block 19 is adjusted according to the use space of the accommodation cavity 18. At the same time, there is a cover plate (not shown) at the rear of the accommodation cavity 18, which is convenient for the maintenance and replacement of the electromagnet block 19 through the cover plate. The control end of the electromagnet block 19 is connected to the integrated control end of the electric energy storage cabinet body 1. A step locking hole 20 is arranged on the side wall of the accommodation cavity 18. The step locking hole 20 is a single-step hole. An outer pushing spring sleeve rod 21 is slidably inserted into the step locking hole 20. Magnetic receiving plates 22 and pressing blocks 23 are respectively arranged at the inner and outer ends of the outer pushing spring sleeve rod 21. The magnetic receiving plate 22 is made of metal iron. A linkage groove 24 located below the step air hole 14 is arranged on the inner top wall of the accommodation cavity 18. The upper part of the magnetic receiving plate 22 extends into the linkage groove 24. The magnetic receiving plate 22 has a horizontal lateral movement space in the linkage groove 24. A magnetic attracting block 25 is arranged at the lower part of the plug head frame 16. The magnetic attracting block 25 is a permanent magnet block, and the magnetic attracting block 25 and the magnetic receiving plate 22 are magnetically attracted to each other. When the magnetic receiving plate 22 moves horizontally, it will indirectly drive the magnetic attracting block 25 to move horizontally. And the horizontal movement of the magnetic receiving plate 22 will indirectly cause the connecting air outlet head 17 to undergo elastic extrusion and contraction during the downward movement through the magnetic attracting block 25. When the connecting air outlet head 17 and the positioning fire extinguishing hole 101 are opposite, they will contact and seal. The sliding friction between the connecting air outlet head 17 and the vertical groove 7 will not affect the movement of the telescopic end of the electric telescopic member 9;

[0048] A pressure receiving plate 26 is arranged on the side of the reset sealing plate 6. When the power supply end of the electromagnet block 19 is in an open state, the outer push spring sleeve rod 21 pushes the pressing block 23 to move outward above the pressure receiving plate 26, and the telescopic end of the electric telescopic member 9 drives the vertical plate 8 to move downward. The downward movement of the vertical plate 8 causes the protruding pressing block 23 to push the pressure receiving plate 26 downward, so that the reset sealing plate 6 hermetically seals the heat dissipation pipeline 5. A rubber ring is bonded to the periphery of the bottom end surface of the reset sealing plate 6 to improve its airtight effect on the heat dissipation pipeline 5. At the same time, the outward movement of the magnetic receiving plate 22 drives the magnetic attraction block 25 on the plug head frame 16 to slowly move outward against the return spring sleeve rod 15, so that the plug head frame 16 is separated from the air inlet side of the stepped air hole 14, and the connecting air outlet head 17 and the positioning fire extinguishing hole 101 are hermetically communicated. In the above process, after the pressing block 23 moves above the pressure receiving plate 26, the vertical plate 8 moves to the lowest position under the action of the electric telescopic member 9. At this time, the stepped air hole 14 corresponds to the positioning fire extinguishing hole 101, and the connecting air outlet head 17 is communicated with the positioning fire extinguishing hole 101;

[0049] When the power supply end of the electromagnet block 19 is in a closed state, when the electromagnet block 19 works, it makes the magnetic receiving plate 22 drive the pressing block 23 to be received in the stepped locking hole 20, and the pressing block 23 and the pressure receiving plate 26 are in a misaligned and separated state. At this time, the downward movement of the pressing block 23 will not drive the pressure receiving plate 26 to move downward. At the same time, the cooperation of the magnetic receiving plate 22 and the magnetic attraction block 25 drives the plug head frame 16 to hermetically seal the air inlet end of the stepped air hole 14.

[0050] Embodiment Five:

[0051] On the basis of Embodiment One, it is further explained that a double-ear rotary shaft frame 27 is arranged on the upper end surface of the battery storage rack 2. A fireproof metal mesh 28 is wound and sleeved on the double-ear rotary shaft frame 27. The metal wires on the fireproof metal mesh 28 transfer the heat near the flame, reduce the surrounding temperature, and prevent the flame generated by the battery cell 3 inside the fireproof metal mesh 28 from spraying out. And a fiberglass fireproof cloth 29 is laid on the outer surface of the fireproof metal mesh 28 to further improve the fireproof performance. A magnetic strip 30 is arranged on the side surface of the partition group 4. The magnetic strip 30 is composed of a magnet. After the fireproof metal mesh 28 is turned down, it can fireproofly cover the outer side surface of the lower battery cell 3. At the same time, the fireproof metal mesh 28 is magnetically fixed through the magnetic strip 30, so as to realize the fireproof and anti-spilling coverage of the battery cell 3 generating an open flame;

[0052] A fixed groove 31 is arranged on the bottom end surface of the double-ear rotary shaft frame 27. The rotary shaft on the double-ear rotary shaft frame 27 is turned over through a bearing seat. A lock rod frame 32 is arranged on the side of the telescopic end of the electric telescopic member 9. When the electric telescopic member 9 drives the vertical plate 8 to move downward, the corresponding lock rod frame 32 moves out of the fixed groove 31, and the fireproof metal mesh 28 has a tendency to turn down under its own gravity, so that the fireproof metal mesh 28 loses its fixation and turns down.

[0053] A control method for the above-mentioned distributed energy storage system, comprising the following steps:

[0054] A. Connect the power control ends of the electric telescopic member 9, the monitoring mechanism and the electromagnet block 19 to the integrated control end of the electrical energy storage cabinet 1. Set the normal range value group of the detection values of the detectors for temperature, position and stress in the monitoring mechanism as A. Connect the cooling air outlet side of the heat exchange mechanism to the heat dissipation pipe 5. Return the telescopic end of the electric telescopic member 9. The heat dissipation pipe 5 is in a ventilation state. The cooling gas discharged from the heat dissipation pipe 5 conducts targeted heat dissipation on the battery cells 3. The power supply end of the electromagnet block 19 is in a normally closed state, and the pressing block 23 is received in the stepped locking hole 20.

[0055] B. Wind the fireproof metal net 28 and sleeved it on the double-ear rotary shaft frame 27. And the return of the telescopic end of the electric telescopic member 9 makes the locking rod frame 32 inserted into the fixing groove 31 to fix the fireproof metal net 28.

[0056] C. When the corresponding monitoring mechanism of the battery cell 3 obtains that the temperature and stress values exceed the normal range value group A and an open fire occurs, the integrated control end on the electrical energy storage cabinet 1 first controls the electromagnet block 19 corresponding to the battery cell 3 at the fault position to be powered off, so that the pressing block 23 moves outward above the pressure receiving plate 26 under the action of the outer pushing spring sleeve rod 21. At the same time, the telescopic end of the electric telescopic member 9 moves downward to make the reset sealing plate 6 perform airtight blockage on the heat dissipation pipe 5 at the fault position. And the outward movement of the magnetic receiving plate 22 separates the plug head frame 16 from the air inlet side of the stepped air hole 14 through the cooperation of the magnetic attraction block 25, so that the connecting air outlet head 17 is connected to the corresponding positioning fire extinguishing hole 101. The fire extinguishing gas discharged from the heptafluoropropane fire protection system sequentially passes through the fire protection air duct 10, the stepped air hole 14 and the positioning fire extinguishing hole 101 and is discharged into the space where the faulty battery cell 3 is located. At the same time, the downward movement of the telescopic end of the electric telescopic member 9 makes the locking rod frame 32 move out of the fixing groove 31, so that the fireproof metal net 28 loses its fixation and then turns down to perform fireproof coverage on the outer side of the faulty battery cell 3. While facilitating the targeted heat dissipation of the battery cells 3 on the electrical energy storage cabinet 1 in the distributed energy storage system, it can also perform timely and accurate positioning fire extinguishing after an open fire occurs due to a thermal fault of the battery cell 3.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A distributed energy storage system includes an electrical energy storage cabinet (1) distributed in the energy storage unit. Inside the electrical energy storage cabinet (1), a battery storage rack (2) and a heat exchange mechanism are respectively arranged. Battery cells (3) are arranged on the battery storage rack (2), and a monitoring mechanism is provided on the battery storage rack (2) for monitoring the state of the battery cells (3). Characterized in that: A partition group (4) is arranged inside the battery storage rack (2) to separate adjacent battery cells (3). A heat dissipation pipe (5) connected to the heat exchange mechanism is arranged on the corresponding wall surface at the rear side of the battery cells (3) inside the battery storage rack (2). A reset plugging plate (6) is movably arranged inside the heat dissipation pipe (5). Vertical grooves (7) communicating through the heat dissipation pipe (5) are arranged vertically on the upper end surface of the battery storage rack (2). Positioning fire extinguishing holes (101) located above the battery cells (3) are communicated and arranged on the inner side wall of the vertical grooves (7). A vertical plate (8) is movably inserted inside the vertical grooves (7). An electric telescopic member (9) is arranged between the top of the vertical plate (8) and the electrical energy storage cabinet (1). Both the electric telescopic member (9) and the monitoring mechanism are connected to the integrated control end of the electrical energy storage cabinet (1). A fire fighting air duct (10) is arranged inside the vertical plate (8) and is connected to the gas outlet side of the heptafluoropropane fire fighting system on the electrical energy storage cabinet (1). An air venting assembly and an outward pushing assembly are arranged on the inner side of the vertical plate (8) from top to bottom. When the monitoring mechanism monitors an abnormality of the battery cells (3), the outward pushing assembly and the electric telescopic member (9) cooperate to push the reset plugging plate (6) in the corresponding heat dissipation pipe (5) of the battery cells (3) to seal airtight. At the same time, when the reset plugging plate (6) completely closes the corresponding heat dissipation pipe (5), the outward pushing assembly drives the air venting assembly to connect the fire fighting air duct (10) with the adjacent positioning fire extinguishing holes (101) and discharge the fire extinguishing gas.

2. A distributed energy storage system according to claim 1, Characterized in that: The heat exchange mechanism includes a heat exchange and cooling air conditioner body, which is composed of a compressor, a condenser, a throttle valve, and an evaporator air conditioning system. The monitoring mechanism is composed of detectors for the temperature, position, and stress of each battery cell (3) storage part arranged on the battery storage rack (2).

3. A distributed energy storage system according to claim 1, Characterized in that: The partition group (4) is formed by the cross intersection of horizontal and vertical partitions. Venting channels (11) are evenly arranged on both side walls of the vertical partitions. A reset groove (12) is arranged at the top end of the inner wall of the heat dissipation pipe (5). An upper reset spring sleeve rod (13) is arranged inside the reset groove (12) and is connected to the reset plugging plate (6). The upper reset spring sleeve rod (13) moves the reset plugging plate (6) upward to make the heat dissipation pipe (5) in a through state.

4. A distributed energy storage system according to claim 1, Characterized in that: The electric telescopic member (9) is composed of an electric push rod. Step air holes (14) are arranged on the inner side wall of the fire air duct (10). The ventilation assembly includes a return spring sleeve rod (15) arranged horizontally along the inner step of the step air hole (14). A plug head frame (16) is movably arranged on the air inlet side of the step air hole (14). The return spring sleeve rod (15) slidably penetrates through a preset hole on the plug head frame (16). A connecting air outlet head (17) is arranged on the outer side of the plug head frame (16). When the plug head frame (16) is completely separated from the air inlet side of the step air hole (14), the connecting air outlet head (17) is hermetically communicated with the positioning fire extinguishing hole (101).

5. A distributed energy storage system according to claim 4, characterized in that: A receiving cavity (18) is equidistantly arranged vertically inside the vertical plate (8). The outer pushing assembly includes an electromagnet block (19) arranged inside the receiving cavity (18). The control end of the electromagnet block (19) is connected to the integrated control end of the electric energy storage cabinet body (1). A step locking hole (20) is arranged on the side wall of the receiving cavity (18). An outer pushing spring sleeve rod (21) is slidably inserted into the step locking hole (20). Magnetic receiving plates (22) and pressing blocks (23) are respectively arranged at the inner and outer ends of the outer pushing spring sleeve rod (21). A linkage groove (24) located below the step air hole (14) is arranged on the inner top wall of the receiving cavity (18). The upper part of the magnetic receiving plate (22) extends into the linkage groove (24). A magnetic attracting block (25) is arranged at the lower part of the plug head frame (16).

6. A distributed energy storage system according to claim 5, characterized in that: A pressure receiving plate (26) is arranged on the side of the reset sealing plate (6). When the power supply end of the electromagnet block (19) is in an off state, the outer pushing spring sleeve rod (21) pushes the pressing block (23) to move outwards above the pressure receiving plate (26). The telescopic end of the electric telescopic member (9) drives the vertical plate (8) to move downwards, so that the reset sealing plate (6) hermetically seals the heat dissipation pipeline (5). At the same time, the outward movement of the magnetic receiving plate (22) drives the magnetic attracting block (25) on the plug head frame (16) to slowly move outwards against the return spring sleeve rod (15), so that the plug head frame (16) is separated from the air inlet side of the step air hole (14), and the connecting air outlet head (17) is hermetically communicated with the positioning fire extinguishing hole (101); When the power supply end of the electromagnet block (19) is in a closed state, when the electromagnet block (19) works, the magnetic receiving plate (22) drives the pressing block (23) to be received in the step locking hole (20), and the pressing block (23) and the pressure receiving plate (26) are in a misaligned and separated state. At the same time, the cooperation between the magnetic receiving plate (22) and the magnetic attracting block (25) drives the plug head frame (16) to hermetically seal the air inlet end of the step air hole (14).

7. A distributed energy storage system according to claim 1, characterized in that: On the upper end face of the battery storage rack (2), a double-ear rotary shaft rack (27) is arranged. A fireproof metal net (28) is wound and sleeved on the double-ear rotary shaft rack (27), and a fiberglass fireproof cloth (29) is laid on the outer surface of the fireproof metal net (28). On the side surface of the partition group (4), a magnetic strip (30) is arranged. After the fireproof metal net (28) is turned down, it can fireproofly cover the outer side of the lower battery cell (3). At the same time, the fireproof metal net (28) is magnetically fixed by the magnetic strip (30).

8. A distributed energy storage system according to claim 7, wherein: A fixed groove (31) is provided at the bottom end face of the double-ear rotary shaft rack (27). A lock rod rack (32) is arranged on the side of the telescopic end of the electric telescopic member (9). When the electric telescopic member (9) drives the vertical plate (8) to move downward, the corresponding lock rod rack (32) moves out of the fixed groove (31), so that the fireproof metal net (28) loses its fixation and then turns down.

9. A control method for the distributed energy storage system according to any one of claims 1-8 above, wherein, it includes the following steps: A. Connect the power control ends of the electric telescopic member (9), the monitoring mechanism and the electromagnet block (19) and the integrated control end of the electric energy storage cabinet body (1). Set the normal range value group of the detection values of the detectors for temperature, position and stress in the monitoring mechanism as A. Connect the cooling air outlet side of the heat exchange mechanism and the heat dissipation pipeline (5). Make the telescopic end of the electric telescopic member (9) return to its original position. The heat dissipation pipeline (5) is in a ventilation state. The power supply end of the electromagnet block (19) is in a normally closed state. Make the pressing block (23) be received in the stepped locking hole (20). B. Wind and sleeve the fireproof metal net (28) on the double-ear rotary shaft rack (27). And the return of the telescopic end of the electric telescopic member (9) makes the lock rod rack (32) insert into the fixed groove (31) to fix the fireproof metal net (28). C. When the temperature and stress values obtained by the corresponding monitoring mechanism of the battery cell (3) exceed the normal range value group A and an open fire occurs, the integrated control end on the electric energy storage cabinet body (1) first controls the electromagnet block (19) corresponding to the battery cell (3) at the fault position to be in a power-off state, so that the pressing block (23) moves outward to above the pressure receiving plate (26) under the action of the outer pushing spring sleeve rod (21). At the same time, the telescopic end of the electric telescopic member (9) moves downward to make the reset sealing plate (6) air-tightly seal the heat dissipation pipeline (5) at the fault position. And the outward movement of the magnetic receiving plate (22) separates the plug head rack (16) from the air inlet side of the stepped air hole (14) through the cooperation of the magnetic attracting block (25), so that the connecting air outlet head (17) is connected to the corresponding positioning fire extinguishing hole (101). The fire extinguishing gas discharged by the heptafluoropropane fire protection system sequentially passes through the fire protection air duct (10), the stepped air hole (14) and the positioning fire extinguishing hole (101) and is discharged into the space where the fault battery cell (3) is located. At the same time, the downward movement of the telescopic end of the electric telescopic member (9) makes the lock rod rack (32) move out of the fixed groove (31), so that the fireproof metal net (28) loses its fixation and then turns down and fireproofly covers the outer side of the fault battery cell (3).

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