Guiding fire-fighting plug-in box and energy storage device

Abstract

The utility model relates to the technical field of battery fire protection, in particular to a guiding fire protection plug-in box and energy storage device, which comprises a box body and a fire protection system, a battery module is arranged in the box body and comprises a plurality of battery cells and a sensor, the battery cells are provided with pressure release valves, and the sensor is used for monitoring whether thermal runaway of the battery cells occurs or not. The fire-fighting system comprises a fire-fighting host, a conduit, a sucking pump and a fire-fighting pump, one end of the conduit is connected with the pressure release valve of each battery cell, the other end of the conduit is connected with the sucking pump and the fire-fighting pump, a valve is arranged on the conduit, and the fire-fighting host is used for opening the valve according to a battery cell thermal runaway signal sent by the sensor; the sucking pump is used for sucking out the high-temperature gas and the electrolyte after the valve is opened, and the fire pump is used for injecting a fire-fighting medium into the battery cell subjected to thermal runaway after the sucking pump sucks out the high-temperature gas and the electrolyte. According to the utility model, high-temperature gas and electrolyte of the thermal runaway battery cell can be sucked out firstly, and then a fire-fighting medium is injected into the thermal runaway battery cell, so that the thermal runaway of the battery cell is quickly treated.

Description

Technical Field

[0001] This utility model relates to the field of battery fire protection technology, specifically to a guide fire-fighting plug box and energy storage device. Background Technology

[0002] Currently, most battery boxes use PACK-level fire protection, which does not have cell guidance. When a cell experiences thermal runaway, high-temperature flammable gas and electrolyte are ejected from the pressure relief valve, spraying towards surrounding boxes or equipment, causing damage to surrounding boxes or equipment, and even triggering greater fire safety problems.

[0003] Chinese utility model patent CN221552099U discloses a device for clustered management of explosion-proof valve ports of battery cells. A clustering pipe is installed at the explosion-proof valve window of the battery cell, connected to a spray pipe, which is connected to a fire extinguishing liquid tank. When burning material is sprayed from the explosion-proof valve window, the fire extinguishing liquid tank sprays fire extinguishing liquid to individually treat the explosion-proof valve window until thermal runaway of the battery cell is controlled. However, when the battery cell experiences thermal runaway, high-temperature, high-pressure gas and liquid are generated. These gases and liquids fill the clustering pipe, requiring a high spray pressure to directly spray fire extinguishing liquid from the fire extinguishing liquid tank onto the explosion-proof valve window. Furthermore, the generated high-temperature, high-pressure gas and liquid can clog the clustering pipe, affecting the fire-fighting effect. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a guided fire-fighting plug box and energy storage device. This device can first control the air pump to draw out high-temperature gas and electrolyte, and then control the fire pump to inject fire-fighting medium into the thermally runaway battery cell through a conduit. This allows for rapid handling of the thermal runaway of the battery cell and prevents it from affecting other battery cells and battery modules.

[0005] To address the aforementioned technical problems, in a first aspect, this utility model provides a guided fire-fighting junction box, comprising a box body and a fire-fighting system. A battery module is installed inside the box body, the battery module comprising multiple battery cells and sensors. Each battery cell is equipped with a pressure relief valve. The sensors are used to monitor whether any battery cell has experienced thermal runaway. The fire-fighting system includes a fire control panel, a conduit, an air extraction pump, and a fire pump. One end of the conduit is connected to the pressure relief valve of each battery cell, and the other end of the conduit is connected to the air extraction pump and the fire pump. A valve is installed on the conduit. The fire control panel is connected to the sensors. The fire control panel is used to open the valves based on the thermal runaway signal sent by the sensors. The air extraction pump is used to extract high-temperature gas and electrolyte after the valves are opened. The fire pump is used to inject fire-fighting medium into the battery cell that has experienced thermal runaway after the air extraction pump extracts the high-temperature gas and electrolyte.

[0006] In some embodiments, a cover is provided on the top of the enclosure, the cover including a top cover plate and a bottom cover plate that are sealed together, a cavity is provided between the top cover plate and the bottom cover plate, a conduit is disposed in the cavity, and one end of the conduit passes through the bottom cover plate and is connected to the pressure relief valve of the battery cell.

[0007] Furthermore, multiple fire extinguishing holes are provided on the bottom plate of the box cover, and a connecting pipe is fixedly installed at the pressure relief valve of the battery cell. One end of the connecting pipe is sealed to the battery cell, the other end of the connecting pipe is sealed to the conduit, and the wall of the other end of the connecting pipe is sealed to the wall of the fire extinguishing hole.

[0008] Furthermore, a high-temperature resistant sealant is provided between the wall of the connecting pipe and the wall of the fire hydrant.

[0009] Furthermore, the conduit is provided with multiple tube caps, the conduit is connected to the connecting tube through the tube caps, the tube caps are fitted onto the connecting tube, and the tube caps and the connecting tube are sealed together by high-temperature resistant sealant or threaded connection.

[0010] Furthermore, the cap is conical in shape.

[0011] In some embodiments, multiple battery modules are arranged in parallel, and the conduit includes an inner conduit and an outer conduit. The inner conduit is arranged inside the cavity, and the outer conduit is arranged outside the casing. Each battery module corresponds to one inner conduit, and the outer conduit is connected to multiple inner conduits.

[0012] Furthermore, a heat insulation plate is provided inside the cavity, and the heat insulation plate is disposed between two adjacent inner conduits to separate the two adjacent inner conduits.

[0013] Furthermore, the external conduit includes a main external conduit and multiple branch external conduits, with each branch external conduit corresponding to one of the multiple internal conduits. The main external conduit and the branch external conduits are respectively equipped with main valves and branch valves, and the fire control panel is used to control the opening and closing of the main valves and branch valves.

[0014] Secondly, this utility model discloses a guided fire-fighting energy storage device, including a plurality of guided fire-fighting plug boxes. The fire-fighting system includes a main system conduit and a plurality of branch system conduits. The plurality of branch system conduits are connected to the main system conduit. The plurality of branch system conduits are respectively connected to the plurality of guided fire-fighting plug boxes one by one. The air extraction pump and the fire pump are connected to the main system conduit.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model, by setting up an air extraction pump and a fire pump, when a certain battery cell experiences thermal runaway, the sensor sends a signal to the fire control panel. The fire control panel controls the valve on the conduit to open, and first controls the air extraction pump to draw out the high-temperature gas and electrolyte, and then controls the fire pump to inject fire-fighting medium into the battery cell that has experienced thermal runaway through the conduit. This can quickly deal with the thermal runaway of the battery cell and prevent it from affecting other battery cells and battery modules.

[0017] 2. This utility model, by setting a cavity in the box cover and placing the conduit in the cavity, isolates the high-temperature gas and liquid generated by the thermal runaway battery cell from the battery module, reducing the heat exchange between the high-temperature gas and liquid and the battery module. In addition, even if the conduit leaks, the high-temperature gas and liquid will be confined in the cavity of the box cover and will not affect the battery module or other boxes.

[0018] 3. This utility model ensures the airtightness between pipes and in the cavity by fixing a connecting pipe at the pressure relief valve of the battery cell, sealing the two ends of the connecting pipe to the battery cell and the conduit respectively, and sealing the pipe wall to the fire hole on the bottom plate of the box cover.

[0019] 4. The plug box of this utility model is equipped with multiple inner conduits, each inner conduit corresponding to a battery module, realizing module-level fire protection, which helps to reduce the amount of fire-fighting media such as perfluorohexanone sprayed.

[0020] 5. By setting a heat insulation plate in the cavity to separate two adjacent inner conduits, this utility model can reduce the impact of thermal runaway of a cell in one battery module on other battery modules, and improve fire safety through physical isolation.

[0021] 6. This utility model enables the guided fire-fighting energy storage device to perform fire-fighting treatment on a specific battery module in a specific compartment by setting a main valve and branch valves on the external conduit, and setting a main system conduit and multiple branch system conduits, thereby achieving precise fire-fighting. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the insert box of this utility model;

[0023] Figure 2 This is a cross-sectional view of the insert box of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the box cover of this utility model;

[0025] Figure 4 This is a sectional view of the box cover of this utility model;

[0026] Figure 5 This is a schematic diagram of the internal catheter of this utility model;

[0027] Figure 6 This is a schematic diagram of the external catheter of this utility model;

[0028] Figure 7 for Figure 2 Enlarged view of point A in the middle.

[0029] Attached reference numerals: 1-Box body; 2-Box cover; 21-Box cover top plate; 22-Box cover bottom plate; 23-Insulation board; 24-Fire vent; 3-Battery module; 31-Battery cell; 32-Connecting pipe; 4-Conduit; 41-Pipe cap; 42-Inner conduit; 43-Outer conduit; 44-Main outer conduit; 45-Branch outer conduit; 46-Main valve; 47-Branch valve; 48-Sealing connector. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] like Figure 1 , 2 As shown, this utility model provides a guide fire-fighting box, including a box body 1 and a fire-fighting system. A battery module 3 is installed inside the box body 1. The battery module 3 includes multiple battery cells 31 and sensors. A pressure relief valve is installed on the battery cells 31. The sensors are used to monitor whether any battery cell 31 has thermal runaway. The sensors can be smoke or heat detectors. The fire-fighting system includes a fire control panel, a conduit 4, an air extraction pump, and a fire pump. One end of the conduit 4 is connected to the pressure relief valve of each battery cell 31, and the other end of the conduit 4 is connected to the air extraction pump and the fire pump. A valve is installed on the conduit 4. The fire control panel is connected to the sensors. The fire control panel is used to open the valves according to the thermal runaway signal of the battery cell 31 sent by the sensors. The air extraction pump is used to draw out high-temperature gas and electrolyte after the valves are opened. The fire pump is used to inject fire-fighting medium into the battery cell 31 that has experienced thermal runaway after the air extraction pump draws out the high-temperature gas and electrolyte.

[0032] Understandably, when a battery cell 31 experiences thermal runaway, the sensor sends a signal to the fire control panel. The fire control panel then opens the valve on the conduit 4, first controlling the air pump to extract the high-temperature gas and electrolyte, and then controlling the fire pump to inject fire-fighting medium into the thermally runaway battery cell 31 through the conduit 4. This allows for rapid handling of the thermal runaway of the battery cell 31, preventing it from affecting other battery cells 31 and the battery module 3. The air pump can be connected to a storage tank outside the battery box to recover the electrolyte, and the fire pump can be connected to a fire-fighting tank outside the battery box, which can store fire-fighting media such as perfluorohexanone.

[0033] In some embodiments, such as Figure 2As shown, a cover 2 is provided on the top of the box body 1. The cover 2 includes a top cover plate 21 and a bottom cover plate 22 that are sealed together. The outer edge of the bottom cover plate 22 is sealed to the top of the box body 1. A sealed cavity is provided between the top cover plate 21 and the bottom cover plate 22. A conduit 4 is provided in the cavity. One end of the conduit 4 passes through the bottom cover plate 22 and is connected to the pressure relief valve of the battery cell 31.

[0034] It is understandable that placing the conduit 4 in the cavity isolates the high-temperature gas and liquid generated by the thermal runaway cell 31 from the battery module 3, reducing heat exchange between the high-temperature gas and liquid and the battery module 3. In addition, even if the conduit 4 leaks, the high-temperature gas and liquid will be confined in the cavity of the cover 2 and will not affect the battery module 3 or other boxes.

[0035] Furthermore, such as Figure 3 As shown, multiple fire extinguishing holes 24 are provided on the bottom plate 22 of the box cover, such as... Figure 7 As shown, a connecting pipe 32 is fixedly installed at the pressure relief valve of the battery cell 31. One end of the connecting pipe 32 is sealed to the battery cell 31 (e.g., by welding), the other end of the connecting pipe 32 is sealed to the conduit 4, and the wall of the other end of the connecting pipe 32 is sealed to the wall of the fire hole 24.

[0036] Furthermore, a high-temperature resistant sealant is applied between the wall of the connecting pipe 32 and the wall of the fire hydrant 24.

[0037] Furthermore, such as Figure 5 , 7 As shown, multiple pipe caps 41 are installed on the conduit 4. The conduit 4 is connected to the connecting pipe 32 through the pipe caps 41. The pipe caps 41 are fitted onto the connecting pipe 32, and the pipe caps 41 and the connecting pipe 32 are connected by high-temperature resistant sealant or threaded sealing. By fixing the connecting pipe 32 at the pressure relief valve of the battery cell 31, the two ends of the connecting pipe 32 are respectively sealed to the battery cell 31 and the conduit 4. The pipe wall of the connecting pipe 32 is sealed to the fire hole 24 on the bottom plate 22 of the box cover, ensuring the airtightness between the pipes and the cavity.

[0038] Furthermore, the cap 41 is conical. This utility model only illustrates one shape of the cap 41; the cap 41 can also be cylindrical or other structures.

[0039] In some embodiments, such as Figure 1 As shown, multiple battery modules 3 are arranged in parallel. The conduit 4 includes an inner conduit 42 and an outer conduit 43. The inner conduit 42 is arranged inside the cavity, and the outer conduit 43 is arranged outside the housing 1. Each battery module 3 corresponds to one inner conduit 42, and the outer conduit 43 is connected to multiple inner conduits 42. A through hole is opened on one side of the housing cover 2. Both the inner conduit 42 and the outer conduit 43 are provided with sealing connectors 48, and both the inner conduit 42 and the outer conduit 43 are connected to the through hole through the sealing connectors 48.

[0040] Understandably, each inner conduit 42 corresponds to a battery module 3, realizing module-level fire protection, which helps reduce the amount of fire-fighting media such as perfluorohexanone sprayed.

[0041] Furthermore, a heat insulation plate 23 is provided inside the cavity, and the heat insulation plate 23 is disposed between two adjacent inner conduits 42 to separate the two adjacent inner conduits 42.

[0042] It is understandable that by setting a heat insulation plate 23 in the cavity to separate two adjacent inner conduits 42, the impact of thermal runaway of the cell 31 of one battery module 3 on other battery modules 3 can be reduced, and fire safety is improved through physical isolation.

[0043] Furthermore, such as Figure 6 As shown, the external conduit 43 includes a main external conduit 44 and multiple branch external conduits 45. The multiple branch external conduits 45 are connected one-to-one with multiple internal conduits 42. A main valve 46 and a branch valve 47 are respectively installed on the main external conduit 44 and the branch external conduits 45. The fire alarm control panel is used to control the opening and closing of the main valve 46 and the branch valve 47. The main valve 46 and the branch valve 47 can be solenoid valves.

[0044] Understandably, when a cell 31 in a battery module 3 in the battery box experiences thermal runaway, the fire control panel can open the main valve 46 and the corresponding branch valve 47 to carry out fire suppression on the battery box that has experienced thermal runaway, thus achieving precise fire suppression.

[0045] The installation method of this guide fire hydrant box includes:

[0046] 1) After installing the battery module 3 inside the box 1, install the bottom plate 22 of the box cover according to the position of the connecting pipe 32, so that the connecting pipe 32 passes through the fire hole 24 of the box cover 2 and enters the cavity. Apply high-temperature resistant sealant to the gap between the bottom plate 22 of the box cover and the connecting pipe 32 to ensure the seal between the bottom plate 22 of the box cover and the connecting pipe 32, prevent the leakage of high-temperature gas and electrolyte in case of thermal runaway, and ensure the sealing when venting.

[0047] 2) After the sealant of each connecting pipe 32 and the bottom plate of the cover 22 has cured, apply high-temperature resistant sealant to the inner wall of the pipe cover 41 and install each pipe cover 41 on the upper end of the corresponding connecting pipe 32. In this way, the bottom plate of the cover 22, the connecting pipe 32, the pipe cover 41, and the guide pipe 4 form a sealed whole, ensuring the sealing between the bottom plate of the cover 22, the connecting pipe 32, and the guide pipe, preventing the leakage of high-temperature gas and electrolyte during thermal runaway, and ensuring the sealing during gas extraction.

[0048] 3) The sealing connector 48 of each inner conduit 42 is connected to the corresponding through hole of the box cover 2. According to the sealing test requirements, a sealing test is performed on each inner conduit 42, connecting pipe 32, and box cover bottom plate 22.

[0049] 4) After the sealing test, the top plate 21 of the box cover is installed on the bottom plate 22 of the box cover, and the heat insulation plate 23 abuts against the top plate 21 of the box cover. The heat insulation plate 23 divides the box cover 2 into multiple independent sealed spaces. The high temperature gas and electrolyte of the thermal runaway module cannot affect other battery modules 3. The fire safety is improved through physical isolation.

[0050] 5) After the box is installed, connect the sealing connector 48 of the outer conduit 43 to the corresponding through hole of the box cover 2.

[0051] This utility model also discloses a guided fire-fighting energy storage device, including multiple guided fire-fighting plug boxes. The fire-fighting system includes a main system conduit 4 and multiple branch system conduits 4. The multiple branch system conduits 4 are connected to the main system conduit 4. The multiple branch system conduits 4 are respectively connected to the multiple guided fire-fighting plug boxes one by one. An air pump and a fire pump are connected to the main system conduit 4.

[0052] The working principle of this guided fire-fighting energy storage device is as follows:

[0053] When cell 31 experiences thermal runaway, the alarm signal from the smoke and heat detectors allows the fire control panel to pinpoint the specific junction box and battery module 3 experiencing thermal runaway. The main valve 46 of the corresponding junction box's outer conduit 43 opens, as does the branch valve 47 of the corresponding thermally runaway battery module 3. The branch valve 47 of battery modules 3 that have not experienced thermal runaway remains closed. The fire control panel activates the air pump, drawing out the high-temperature gas and electrolyte ejected from the thermally runaway cell 31 through the inner conduit 42 and storing it in a storage tank within the fire control panel. This prevents the high-temperature gas and electrolyte from the thermally runaway battery module 3 from affecting other battery modules 3 that have not experienced thermal runaway, thus improving fire safety.

[0054] After the fire control panel extracts all the high-temperature gas and electrolyte, it injects fire-fighting media such as perfluorohexanone into the thermally runaway battery module 3 through the main valve 46, branch valve 47, and inner conduit 42. Meanwhile, the branch valve 47 of the battery module 3, which has not experienced thermal runaway, is closed, thus achieving module-level fire protection and precise fire protection. At the same time, it reduces the amount of fire-fighting media sprayed, saves fire-fighting media such as perfluorohexanone, and improves economic efficiency.

[0055] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A guide fire-fighting junction box, characterized in that: The system includes a housing (1) and a fire protection system. The housing (1) contains a battery module (3). The battery module (3) includes multiple battery cells (31) and a sensor. Each battery cell (31) is equipped with a pressure relief valve. The sensor is used to monitor whether any battery cell (31) has thermal runaway. The fire protection system includes a fire control unit, a conduit (4), an air pump, and a fire pump. One end of the conduit (4) is connected to the pressure relief valve of each battery cell (31). The other end of the conduit (4) is connected to the air pump and the fire pump. A valve is installed on the conduit (4). The fire control unit is connected to the sensor. The fire control unit is used to open the valve according to the thermal runaway signal of the battery cell (31) sent by the sensor. The air pump is used to draw out high-temperature gas and electrolyte after the valve is opened. The fire pump is used to inject fire protection medium into the battery cell (31) that has thermal runaway after the air pump draws out the high-temperature gas and electrolyte.

2. A guide fire-fighting junction box according to claim 1, characterized in that: The top of the box body (1) is provided with a box cover (2), the box cover (2) includes a box cover top plate (21) and a box cover bottom plate (22) that are sealed together. A cavity is provided between the box cover top plate (21) and the box cover bottom plate (22). The conduit (4) is provided in the cavity. One end of the conduit (4) passes through the box cover bottom plate (22) and is connected to the pressure relief valve of the battery cell (31).

3. A guide fire-fighting junction box according to claim 2, characterized in that: Multiple fire holes (24) are provided on the bottom plate (22) of the box cover. A connecting pipe (32) is fixedly installed at the pressure relief valve of the battery cell (31). One end of the connecting pipe (32) is sealed to the battery cell (31), and the other end of the connecting pipe (32) is sealed to the conduit (4). The pipe wall of the other end of the connecting pipe (32) is sealed to the hole wall of the fire hole (24).

4. A guide fire-fighting junction box according to claim 3, characterized in that: A high-temperature resistant sealant is provided between the wall of the connecting pipe (32) and the wall of the fire hole (24).

5. A guide fire-fighting junction box according to claim 3, characterized in that: The conduit (4) is provided with multiple tube caps (41), the conduit (4) is connected to the connecting tube (32) through the tube caps (41), the tube caps (41) are fitted on the connecting tube (32), and the tube caps (41) and the connecting tube (32) are connected by high temperature resistant sealant or thread seal.

6. A guide fire-fighting junction box according to claim 5, characterized in that: The cap (41) is conical.

7. A guide fire-fighting junction box according to claim 2, characterized in that: Multiple battery modules (3) are arranged in parallel. The conduit (4) includes an inner conduit (42) and an outer conduit (43). The inner conduit (42) is arranged inside the cavity, and the outer conduit (43) is arranged outside the housing (1). Each battery module (3) corresponds to one inner conduit (42), and the outer conduit (43) is connected to multiple inner conduits (42).

8. A guide fire-fighting junction box according to claim 7, characterized in that: A heat insulation plate (23) is provided inside the cavity. The heat insulation plate (23) is disposed between two adjacent inner conduits (42) to separate the two adjacent inner conduits (42).

9. A guide fire-fighting junction box according to claim 7, characterized in that: The external conduit (43) includes a main external conduit (44) and multiple branch external conduits (45). The multiple branch external conduits (45) are connected to the multiple internal conduits (42) in a one-to-one correspondence. The main external conduit (44) and the branch external conduits (45) are respectively equipped with a main valve (46) and a branch valve (47). The fire control panel is used to control the opening and closing of the main valve (46) and the branch valve (47).

10. A guided fire-fighting energy storage device for a guided fire-fighting plug box according to any one of claims 1 to 9, characterized in that: The fire protection system includes multiple guide fire hydrant boxes, and includes a main system conduit (4) and multiple branch system conduits (4). The multiple branch system conduits (4) are connected to the main system conduit (4), and the multiple branch system conduits (4) are respectively connected to the multiple guide fire hydrant boxes one by one. The air extraction pump and the fire pump are connected to the main system conduit (4).

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