Fire extinguishing system and energy storage system

Abstract

The utility model relates to the technical field of energy storage, in particular to a fire extinguishing system and an energy storage system. The fire extinguishing system is used for an energy storage system, the energy storage system comprises a plurality of energy storage cabinets, and the fire extinguishing system comprises a liquid storage device; a pump providing driving force; the fire-fighting pipeline comprises a main pipeline and branch pipelines, the branch pipelines and the energy storage cabinets are correspondingly arranged, and under the action of the pump, liquid in the liquid storage device flows to the main pipeline and then flows to the corresponding energy storage cabinets through the branch pipelines; an electromagnetic valve and a manual valve are arranged on each branch pipeline in parallel, the number of the electromagnetic valves is at least two and the electromagnetic valves are connected in series, and the number of the manual valves is at least two and the manual valves are connected in series. The utility model also provides an energy storage system which comprises an energy storage cabinet; and the branch pipelines are correspondingly communicated with the energy storage cabinet. The technical problem that in the prior art, a fire extinguishing system only adopts an electromagnetic valve to control on-off of a fire extinguishing branch, and the fire extinguishing effect cannot be achieved once the electromagnetic valve is damaged or fails is solved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a fire protection system and an energy storage system. Background Technology

[0002] With the large-scale use of battery energy storage systems, their safety has become an increasing concern. A fire in a battery energy storage system can cause significant safety accidents and property damage; therefore, existing battery energy storage systems are often equipped with fire suppression systems.

[0003] For example, document CN114010989A discloses an intelligent fire protection system for battery energy storage systems, including an energy storage battery unit, fire protection devices, a fire linkage control system, and an audible and visual alarm device. The energy storage battery unit includes an electrical box and battery modules, a battery management system, a fire sensor, a fire branch pipe, and a solenoid valve installed inside the electrical box. The battery module is composed of several battery cells. The fire branch pipe is arranged in the upper part of the electrical box, and the solenoid valve is installed at the end of the fire branch pipe to control the opening and closing of the fire branch pipe. The fire protection devices include fire pipelines, a booster pump, a fire-fighting medium storage tank, and an insulating liquid storage tank. The fire-fighting medium storage tank is connected to the fire pipeline, and the insulating liquid storage tank is connected to the fire pipeline via the booster pump. The fire pipeline is connected to the fire branch pipe inside the electrical box. The fire linkage control system is connected to the audible and visual alarm device to control it to perform audible and visual alarms. The battery management system is electrically connected to the battery modules, the fire sensor, and the solenoid valve, and also communicates with the fire linkage control system via data. The aforementioned fire protection system only uses solenoid valves to control the on / off of fire protection branch circuits. Once the solenoid valves are damaged or malfunction, they cannot perform their fire protection function. Utility Model Content

[0004] To address the technical problem that existing fire protection systems rely solely on solenoid valves to control the on / off of fire protection branches, rendering them ineffective in fire protection once the solenoid valves are damaged or malfunctioning, this invention provides a fire protection system and energy storage system that solve the aforementioned technical problem.

[0005] The technical solution adopted in this utility model is as follows:

[0006] This utility model provides a fire protection system for an energy storage system, the energy storage system comprising a plurality of energy storage cabinets, including:

[0007] liquid storage device;

[0008] Pumps provide driving force;

[0009] The fire protection pipeline includes a main pipeline and branch pipelines. The branch pipelines are correspondingly arranged with the energy storage cabinet. Under the action of the pump, the liquid in the liquid storage device flows to the main pipeline and then flows to the corresponding energy storage cabinet through the branch pipelines. Each branch pipeline is equipped with a solenoid valve and a manual valve in parallel. There are at least two solenoid valves connected in series and at least two manual valves connected in series.

[0010] According to one embodiment of the present invention, the liquid in the liquid storage device flows to the main pipeline through the liquid inlet pipeline. The liquid inlet pipeline is connected to the liquid storage device through at least two connection ports. A pump is provided at each connection port. An on / off valve for controlling the on / off state is provided on the liquid inlet pipeline.

[0011] According to one embodiment of the present invention, at least two branch pipelines are provided for each of the energy storage cabinets.

[0012] According to one embodiment of the present invention, the liquid inlet pipeline includes a liquid inlet section, an intermediate section and a liquid outlet section connected in sequence. There are two intermediate sections, which are arranged in parallel. The solenoid valve and the manual valve are respectively installed on the two intermediate sections.

[0013] According to one embodiment of the present invention, the liquid inlet section is connected to the two intermediate sections via a tee, and the two intermediate sections are connected to the liquid inlet section via a tee.

[0014] According to one embodiment of the present invention, it further includes a sewage tank, which holds the liquid flowing out of the energy storage system.

[0015] According to one embodiment of the present invention, it further includes a guide channel that directs the liquid flowing out of the energy storage system to the sewage tank.

[0016] This utility model also provides an energy storage system, including:

[0017] Energy storage cabinet;

[0018] The fire protection system has its branch pipes connected to the corresponding energy storage cabinet.

[0019] According to one embodiment of the present invention, the energy storage cabinet is provided with at least two liquid inlets, and the at least two liquid inlets are respectively connected to branch pipelines.

[0020] According to one embodiment of the present invention, the energy storage cabinet is provided with a plurality of battery packs, at least one liquid inlet is connected to the cabinet body of the energy storage cabinet, and at least one liquid inlet is connected to each battery pack.

[0021] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0022] The fire protection system of this utility model is equipped with solenoid valves and manual valves connected in parallel on the branch pipelines. Even if the solenoid valves fail, the branch pipelines can still be connected by operating the manual valves. Liquid in the main pipeline can enter the corresponding energy storage cabinet through the branch pipelines for fire protection. Furthermore, the system is equipped with at least two solenoid valves connected in series and two manual valves connected in series, which can prevent water leakage in the pipelines.

[0023] The fire protection system of this utility model is equipped with an on / off valve on the liquid inlet pipeline, which can be used to control the on / off of the liquid storage device to the main pipeline; the liquid inlet pipeline is connected to the liquid storage device through at least two connection ports, and a pump is installed at each connection port. In the event that the pump at one connection port fails, the other pump is used as a backup pump to still pump out the liquid in the liquid storage device to ensure the liquid supply; at least two branch pipelines are set for each energy storage cabinet to ensure that the liquid in the main pipeline can be supplied to the energy storage cabinet, so as to play a fire protection role.

[0024] The fire protection system of this utility model is also equipped with a sewage tank, which can collect the liquid discharged from the energy storage system and treat it uniformly by a sewage treatment truck to ensure that the environment is not polluted; the liquid is guided to the sewage tank through a guide trough, which facilitates the collection and diversion of the liquid.

[0025] This utility model's energy storage system features two liquid inlets on the energy storage cabinet. One inlet connects to the cabinet's interior, while the other connects to each battery pack. Liquid can enter the cabinet through one inlet to completely submerge it for fire extinguishing, and it can also enter the burning battery pack through the other inlet to submerge it for fire extinguishing, ensuring effective fire suppression. In actual fire suppression operations, sensors can identify the specific energy storage cabinet and battery pack on fire, then control the liquid storage device to flood the corresponding battery pack, and simultaneously control the liquid storage device to flood the entire energy storage cabinet, thereby achieving the purpose of fire suppression.

[0026] This utility model's energy storage system can achieve a cluster-level immersion fire extinguishing mechanism, effectively suppressing cluster-level reignition, ensuring that the fire-fighting liquid fully covers and penetrates all parts of the battery clusters and battery packs, completely extinguishing the fire and preventing its recurrence; the opening and closing of valves between each cluster can be controlled independently, improving system safety; the minimum distance from the manual valve to the corresponding energy storage cabinet is not less than the safety distance, and when the solenoid valve fails, it can be manually operated remotely to open the manual valve to prevent heat spread, making it safer; after the flooded liquid extinguishes the fire, it can flow out through a guide tank into a sewage tank, making it more environmentally friendly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the energy storage system of this utility model;

[0028] Figure 2 for Figure 1Enlarged view of part A;

[0029] Figure 3 for Figure 1 A magnified view of a portion of the structure shown;

[0030] Figure 4 This is a structural diagram of the fire protection piping system;

[0031] Figure 5 This is a schematic diagram of the branch pipeline structure;

[0032] Figure 6 This is a structural schematic diagram of the energy storage cabinet;

[0033] Figure 7 This is a schematic diagram of the fire protection working principle of the energy storage system of this utility model;

[0034] In the diagram: 1-Liquid storage device; 2-Pump; 3-Fire protection pipeline; 31-Main pipeline; 32-Branch pipeline; 321-Inlet section; 322-Intermediate section; 323-Outlet section; 324-Solenoid valve; 325-Manual valve; 326-Tee; 33-Inlet pipeline; 331-On / off valve; 332-Branch pipeline; 4-Sewage tank; 5-Guide trough; 6-Energy storage cabinet; 61-Cabinet body; 611-First inlet; 612-Second inlet. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figure 1-7 As shown, this embodiment provides a fire protection system for an energy storage system. The fire protection system includes a liquid storage device 1, a pump 2, and a fire protection pipeline 3. The liquid storage device 1 is used to store fire extinguishing liquid. The fire protection pipeline 3 connects the liquid storage device 1 and the energy storage system. The pump 2 provides driving force. Under the action of the pump 2, the liquid in the liquid storage device 1 flows to the energy storage system through the fire protection pipeline 3, which can perform immersion fire extinguishing on the energy storage system.

[0037] The liquid storage device 1 is used to store fire extinguishing liquid. The liquid storage device 1 can be specifically configured as a liquid storage tank, which can be used to store large quantities of liquid. The pump 2 provides driving force and can be installed at the connection point between the liquid storage device 1 and the fire pipeline 3.

[0038] Fire-fighting pipeline 3 is used to transport the liquid in the liquid storage device 1 to the energy storage system. Fire-fighting pipeline 3 is located between the liquid storage device 1 and the energy storage system, with its two ends connected to the liquid storage device 1 and the energy storage system, respectively. Fire-fighting pipeline 3 includes a main pipeline 31 and branch pipelines 32. There are several branch pipelines 32. When there are multiple branch pipelines 32, they are connected in parallel and connected to the main pipeline 31, respectively. The liquid in the liquid storage device 1 first flows to the main pipeline 31 and then flows to the energy storage system through the branch pipelines 32.

[0039] As a preferred technical solution in this embodiment, the energy storage system includes several energy storage cabinets 6 arranged side by side, and the main pipeline 31 extends parallel to the arrangement direction of the energy storage cabinets 6.

[0040] In a preferred embodiment, the liquid in the storage device 1 flows to the main pipeline 31 through the inlet pipe 33. One end of the inlet pipe 33 is connected to the storage device 1, and the other end is connected to the main pipeline 31. Preferably, at least two branch pipes 332 are connected to the end of the inlet pipe 33 that is connected to the storage device 1. Each branch pipe 332 is connected to the storage device 1, and a pump 2 is provided at the connection point between each branch pipe 332 and the storage device 1. In this embodiment, two branch pipes 332 are provided, and the two branch pipes 332 are connected to the inlet pipe 33 through a tee. Two pumps 2 are provided corresponding to the two branch pipes 332, one of which can be used as a main pump, and the other pump 2 can be used as a standby pump.

[0041] As a preferred technical solution in this embodiment, the liquid inlet pipeline 33 is provided with an on / off valve 331 for controlling the on / off state. The on / off valve 331 can be, but is not limited to, a manual valve; more preferably, the on / off valve 331 is a normally open manual valve.

[0042] As a preferred embodiment, branch pipes 32 are provided corresponding to energy storage cabinets 6, with one end of the branch pipe 32 connected to the main pipe 31 and the other end of the branch pipe 32 connected to the corresponding energy storage cabinet 6. Preferably, at least two branch pipes 32 are provided for each energy storage cabinet 6.

[0043] As a preferred embodiment, each branch pipeline 32 is equipped with a solenoid valve 324 and a manual valve 325 connected in parallel. There are at least two solenoid valves 324 connected in series, and at least two manual valves 325 connected in series. Specifically, the branch pipeline 32 includes an inlet section 321, an intermediate section 322, and an outlet section 323 connected sequentially. There are two intermediate sections 322 connected in parallel, with one end connected to the inlet section 321 and the other end connected to the outlet section 323. Specifically, the inlet section 321 is connected to the two intermediate sections 322 via a tee 326, and the two intermediate sections 322 are connected to the outlet section 323 via a tee 326. At least two solenoid valves 324 are connected in series on one intermediate section 322, and at least two manual valves 325 are connected in series on the other intermediate section 322. In this embodiment, there are two solenoid valves 324 and two manual valves 325. Solenoid valve 324 is optional, but not limited to, normally closed solenoid valve.

[0044] As a preferred technical solution in this embodiment, the minimum distance between the manual valve 325 and the energy storage cabinet 6 is not less than the safety distance, which can ensure the personal safety of the operator.

[0045] The fire protection system also includes a sewage tank 4, where liquids flowing out of the energy storage system can be collected and treated centrally.

[0046] In order to concentrate the liquid flowing out of the energy storage system into the sewage tank 4, a guide channel 5 is also provided. One end of the guide channel 5 is located below the energy storage cabinet 6, and the other end of the guide channel 5 is connected to the sewage tank 4. The guide channel 5 guides the liquid flowing out of the energy storage cabinet 6 to the sewage tank 4.

[0047] This embodiment also provides an energy storage system, including an energy storage cabinet 6 and a fire protection system, which is used to extinguish fires in the energy storage cabinet 6.

[0048] There are multiple energy storage cabinets 6. When there are multiple energy storage cabinets 6, they can be arranged in a straight line. Each energy storage cabinet 6 includes a cabinet body 61, which contains multiple battery packs. The cabinet body 61 is equipped with a liquid inlet. The branch pipeline 32 of the fire protection system is connected to the liquid inlet on the cabinet body 61 to facilitate the delivery of liquid to the energy storage cabinet 6 for fire extinguishing.

[0049] As a preferred embodiment, each energy storage cabinet 6 is provided with at least two liquid inlets. At least one liquid inlet is connected to the interior of the cabinet 6, allowing liquid to enter the cabinet 6 and flood the entire energy storage cabinet 6. At least one liquid inlet is connected to the battery pack inside the cabinet 6, allowing liquid to enter the corresponding battery pack and flood it. In this embodiment, two liquid inlets are provided: a first liquid inlet 611 and a second liquid inlet 612. The first liquid inlet 611 is connected to each battery pack, and the second liquid inlet is connected to the interior of the cabinet 6. Each energy storage cabinet 6 also has two corresponding branch pipes 32, which are connected to the first liquid inlet 611 and the second liquid inlet 612, respectively. Specifically, a pipe is formed inside the cabinet 6 to connect the first liquid inlet 611 and each battery pack. An on / off valve is also provided on the pipe between the first liquid inlet 611 and the battery pack. Sensors are provided inside the cabinet 61 and in each battery pack to detect whether a fire has occurred.

[0050] Based on the above technical solution, the energy storage system in this embodiment operates as follows: all fire-fighting electronic components of the energy storage system are connected and communicate with the main control box. Simultaneously, the main control box can send internal detection information to the site-level controller, which then controls the on / off valve 331 on the liquid inlet pipe 33 outside the energy storage system cabinet and the solenoid valve 324 on the branch pipe 32 corresponding to the energy storage cabinet 6. For the fire-fighting system of this energy storage system, implementation examples under different conditions are described below.

[0051] like Figure 6 As shown, when a battery thermal runaway or fire occurs inside a single cluster-level cabinet (numbered 1x), the system's detectors transmit electrical signals to the main control box. The control system then remotely controls the pump 2 in the pipeline and the on / off valve 331 on the liquid inlet pipeline 33 to identify the inside of cabinet 61 of 1x. It then opens two solenoid valves 324 on the branch pipeline 32 connected to the first liquid inlet 611 to flood the corresponding battery pack with liquid, thus immersing the battery pack. Simultaneously, it opens two solenoid valves 324 on the branch pipeline 32 connected to the second liquid inlet 612 to flood the entire cluster, achieving cluster-level immersion and thus extinguishing the fire.

[0052] The aforementioned fire protection and energy storage system, through the installation of two parallel branch pipes 332, ensures that the liquid in the storage device 1 can reach the main pipe 31 under the action of the pump 2. Each branch pipe 32 is equipped with two solenoid valves 324 and two manual valves 325 connected in parallel. When the solenoid valve 324 fails, the two manual valves 325 can be manually opened, allowing the liquid to flow through the intermediate section 322 where the two manual valves 325 are located, ensuring the fire protection effect. The installation of two solenoid valves 324 and two manual valves 325 can prevent water leakage in the corresponding pipes. The aforementioned fire protection system can achieve a cluster-level immersion fire extinguishing mechanism: effectively suppressing cluster-level reignition, ensuring that the fire-fighting liquid fully covers and penetrates all parts of the battery cluster, completely extinguishing the fire and preventing its recurrence.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing" and other such terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two modules or the interaction between two modules.

Claims

1. A fire protection system for an energy storage system, said energy storage system comprising a plurality of energy storage cabinets (6), characterized in that, include: Liquid storage device (1); Pump (2) provides driving force; Fire-fighting pipeline (3), the fire-fighting pipeline (3) includes a main pipeline (31) and branch pipelines (32). The branch pipelines (32) are correspondingly arranged with the energy storage cabinet (6). Under the action of the pump (2), the liquid in the liquid storage device (1) flows to the main pipeline (31) and then flows to the corresponding energy storage cabinet (6) through the branch pipelines (32). Each branch pipeline (32) is equipped with a solenoid valve (324) and a manual valve (325) in parallel. There are at least two solenoid valves (324) connected in series and at least two manual valves (325) connected in series.

2. The fire protection system according to claim 1, characterized in that, The liquid in the storage device (1) flows to the main pipeline (31) through the inlet pipeline (33). The inlet pipeline (33) is connected to the storage device (1) through at least two connection ports. The pump (2) is provided at each connection port. The inlet pipeline (33) is provided with an on / off valve (331) for controlling the on / off state.

3. A fire protection system according to claim 1, characterized in that, For each of the energy storage cabinets (6), at least two branch pipelines (32) shall be provided.

4. A fire protection system according to claim 2, characterized in that, The liquid inlet pipeline (33) includes a liquid inlet section (321), an intermediate section (322) and an outlet section (323) connected in sequence. There are two intermediate sections (322), which are connected in parallel. The solenoid valve (324) and the manual valve (325) are respectively installed on the two intermediate sections (322).

5. A fire protection system according to claim 4, characterized in that, Therefore, the liquid inlet section (321) is connected to the two intermediate sections (322) through a tee (326), and the two intermediate sections (322) are connected to the liquid inlet section (321) through a tee (326).

6. A fire protection system according to claim 1, characterized in that, It also includes a sewage tank (4), which holds the liquid flowing out of the energy storage system.

7. A fire protection system according to claim 6, characterized in that, It also includes a guide channel (5) that directs the liquid flowing out of the energy storage system to the sewage tank (4).

8. An energy storage system, characterized in that, include: Energy storage cabinet (6); The fire protection system according to any one of claims 1-7, wherein the branch pipe (32) is correspondingly connected to the energy storage cabinet (6).

9. An energy storage system according to claim 8, characterized in that, The energy storage cabinet (6) is provided with at least two liquid inlets, and the at least two liquid inlets are respectively connected to the branch pipeline (32).

10. An energy storage system according to claim 9, characterized in that, The energy storage cabinet (6) is equipped with several battery packs, and at least one liquid inlet is connected to the cabinet body of the energy storage cabinet (6), and at least one liquid inlet is connected to each battery pack.

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