Energy storage container fire extinguishing system and energy storage container

Abstract

The utility model belongs to the technical field of energy storage batteries, and particularly relates to an energy storage container fire extinguishing system and an energy storage container. In the fire extinguishing system for the energy storage container, a gas detection unit comprises a connecting piece and a detection piece, and the detection piece is communicated with the internal atmosphere of the PACK through the connecting piece and a pipeline. When thermal runaway occurs and a safety valve of a battery cell in the PACK is opened, the characteristic quantity of gas in the PACK is abnormal, the detection part transmits a detection signal to the fire-fighting host after detecting the abnormity, and the fire-fighting host controls the execution unit to execute fire-fighting action. The detection pieces are independently arranged, and the number demand of the detection pieces is reduced through cooperation of the connecting piece with the sampling function and the pipeline. The detection piece is far away from the battery cell which may have thermal runaway, so that the working condition of the detection piece is improved. The gas detection unit also replaces electric connection with a gas pipeline connection part, so that the signal processing difficulty is reduced, and the gas detection unit is easy to maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and in particular relates to an energy storage container fire protection system and an energy storage container. Background Art

[0002] Containerized energy storage systems are new energy devices that store large numbers of lithium-ion batteries within containers, enabling peak load shifting and frequency modulation. They offer advantages such as ease of installation, transport, and modularity. However, the large number of lithium-ion batteries within these systems presents significant safety risks, and fires are a frequent occurrence, causing significant losses and disruptions.

[0003] At present, the fire protection system of container energy storage system is usually selected from the following schemes: (1) PACK-level detection, PACK-level fire protection, it is necessary to install a detector in each PACK to detect the temperature and pressure values ​​inside the PACK, and feed it back to the control module to accurately sense the situation of each PACK, but the system is more complex, with more installed devices and higher costs; (2) Cluster-level detection, cluster-level fire protection, the detector is installed at the cluster level, there is no detector inside the PACK, it is necessary to wait until the battery cell has thermal runaway and the gas is ejected through the PACK explosion-proof safety valve before it can be detected by the cluster-level sensor and the fire protection strategy is executed. It is impossible to detect and process in the early stage of the battery cell valve opening; (3) Compartment-level detection, compartment-level fire protection, container detectors are installed, and the battery cell can only be detected by the container detector after the battery cell has thermal runaway. This method has the worst safety. When the fire protection strategy is activated, the fire protection agent cannot be sprayed into the PACK to control the temperature of the battery cell and extinguish the fire.

[0004] Chinese patent CN202410115417.6 discloses a fire control method for a liquid-cooled energy storage system. It performs both PACK-level detection and cabin-level detection simultaneously, and classifies the alarm levels according to the results and determines whether to report an alarm signal to the alarm control host. If the alarm control host receives an alarm signal, it activates different multi-level alarm linkage strategies according to the alarm level, achieving simultaneous monitoring and separate treatment of PACK-level fires and cabin-level fires. It can quickly detect early signs of thermal runaway at the PACK and cabin levels and perform graded warnings, and combine multi-level alarm linkage strategies to extinguish fires, achieving multi-level joint fire protection at the PACK, cluster, and cabin levels. However, it requires a dedicated composite fire detector for lithium battery fire monitoring, i.e., a PACK-level fire detector, to be installed inside each PACK (i.e., battery module). Although it can improve the accuracy of strategies for various fire events and reduce accident losses, its equipment and control are relatively complex, and the fire protection system itself is relatively expensive.

[0005] Therefore, providing an energy storage container fire protection system with better economy is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0006] In view of the existing phenomenon, the present invention provides a method to solve at least one of the above technical problems.

[0007] The technical solution provided in this application is a fire-fighting system for an energy storage container, wherein the energy storage container includes multiple PACKs; the fire-fighting system for the energy storage container includes: a gas detection unit, a fire-fighting host, and an execution unit; wherein the gas detection unit includes a connector arranged in a one-to-one correspondence with the PACK, and a detection component connected to the connector via a pipeline; the connector connects the PACK and the pipeline; the detection component is arranged inside the container body, detects gas characteristic quantities of thermal runaway of the PACK and generates a detection signal; the fire-fighting host is electrically connected to the detection component and the execution unit, receives the detection signal, and determines whether to control the execution unit to perform a fire-fighting action based on the detection signal.

[0008] Furthermore, the gas detection unit includes a fan, which sends the gas in the pipeline into the detection element.

[0009] Furthermore, the detection component includes a gas tank and a sensor, the gas tank is used to collect gas, and the sensor is arranged in the gas tank.

[0010] Furthermore, the sensor is a combustible gas concentration detector.

[0011] Furthermore, the execution unit includes an electromagnetic three-way valve electrically connected to the fire host. The electromagnetic three-way valve is in a first state or a second state according to the electrical signal of the fire host. In the first state, the connecting part and the detection part are connected, and in the second state, the connecting part and the execution unit are connected.

[0012] Furthermore, the electromagnetic three-way valve is in the second state when power is lost.

[0013] Furthermore, the execution unit includes a fire-fighting agent spraying component capable of spraying fire-fighting agent into the PACK.

[0014] Furthermore, the execution unit is connected to the connecting piece and executes the fire-fighting action through the connecting piece.

[0015] Furthermore, the connection between the connector and the PACK is detachable.

[0016] Another technical solution provided by the present application is an energy storage container, including the above-mentioned energy storage container fire protection system.

[0017] The beneficial effects of this application are as follows: In the energy storage container fire protection system of this application, the gas detection unit includes a connector and a detection element, which is connected to the internal atmosphere of the pack via the connector and a pipeline. When thermal runaway occurs and the safety valve of the battery cell in the pack opens, the characteristic quantity of the gas in the pack will become abnormal. After detecting the abnormality, the detection element transmits a detection signal to the fire control host, which controls the execution unit to execute the fire protection action.

[0018] Compared with the prior art solution of placing detection parts on each PACK, the PACK-level detection of the present application sets up the detection parts independently, and connects the internal atmosphere of one or more PACKs to the detection parts through a gas path through the connection parts and pipelines with sampling functions, thereby reducing the number of detection parts required. The detection parts are far away from the battery cells that may experience thermal runaway, which improves the working conditions of the detection parts, can improve the detection accuracy, and reduce the cost of the detection parts. The detection parts are also easier to maintain. The service life of general gas detection sensors is within 5 years. After being installed inside the PACK, it is not easy to repair. The detection parts of the present application can be maintained in the designed area. The gas detection unit replaces the electrical connection with the gas pipeline connection part, which reduces the difficulty of signal processing. Therefore, the PACK-level detection solution of the present application is highly reliable and has lower equipment cost and control cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0020] Figure 1 A schematic diagram of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a normal working state of an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the firefighting working state of an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of another embodiment of the present invention. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0028] Please refer to the attached Figure 1-3 In the figure, the solid line is the pipeline connection, the dotted line is the electrical connection, and the bold line indicates that there is fluid flowing through the pipeline or electrical signal transmission.

[0029] Example 1 is an energy storage container fire protection system installed in an energy storage container. The energy storage container includes a battery compartment, which is divided into multiple clusters, each of which includes multiple PACKs.

[0030] The energy storage container fire protection system includes: gas detection unit, fire protection host and execution unit;

[0031] The gas detection unit includes a connector corresponding to the PACK and a detection component connected to the connector through a pipeline; the connector connects the PACK and the detection component; the detection component is set inside the container body and can detect the gas characteristic quantity of thermal runaway of the PACK; the fire host is electrically connected to the detection component and the execution unit, receives the detection signal of the detection component and determines whether to control the execution unit to perform the fire action based on the detection signal.

[0032] In the energy storage container fire protection system of this application, the gas detection unit includes a connector and a detector. The detector communicates with the internal atmosphere of the pack through the connector and piping. When thermal runaway occurs and the safety valves of the battery cells in the pack open, the characteristic quantity of the gas inside the pack will become abnormal. Upon detecting this abnormality, the detector transmits a detection signal to the fire control unit, which in turn controls the execution unit to execute the fire protection action, thus achieving pack-level detection and fire protection.

[0033] Compared with the prior art solution of placing detection parts on each PACK, the PACK-level detection of the present application sets up the detection parts independently, and connects the internal atmosphere of one or more PACKs to the detection parts through a gas path through the combination of connectors and pipelines with sampling functions, thereby reducing the number of detection parts required. The detection parts are far away from the battery cells that may experience thermal runaway, which improves the working conditions of the detection parts, can improve the detection accuracy, and reduce the cost of the detection parts. The detection parts are also easier to maintain. The service life of general gas detection sensors is within 5 years, and it is not easy to repair them after being installed inside the PACK. The detection parts of the present application can be maintained in the designed area. The gas detection unit also replaces the electrical connection with a gas pipeline connection part, which reduces the difficulty of signal processing. Therefore, the PACK-level detection solution of the present application is highly reliable and has lower equipment cost and control cost.

[0034] In this embodiment, the connection between the connector and the PACK is detachable, making assembly and disassembly easy.

[0035] In this embodiment, the gas detection unit includes a blower that delivers gas from the pipeline to the detection element. The blower can actively generate negative pressure in the pipeline, improving the efficiency of gas flow from the pack to the detection element, and increasing the speed and efficiency of detecting abnormalities in the detection element.

[0036] In this embodiment, the detection element includes a gas tank and a sensor. The gas tank is used to collect gas, and the sensor is arranged in the gas tank. The gas tank can prolong the contact time between the gas and the sensor, thereby improving the detection accuracy.

[0037] In this embodiment, the sensor is a combustible gas concentration detector. When the safety valve of a battery cell within the pack is opened, the gas within the pack will contain combustible gases such as hydrogen and carbon monoxide. Upon detecting the combustible gas, the detector transmits a detection signal to the fire control unit, which instructs the execution unit to execute the firefighting action. In other embodiments, the sensor may also include a temperature sensor, flow rate sensor, pressure sensor, or other sensor capable of detecting thermal runaway or gas anomalies after the battery cell safety valve is opened.

[0038] In this embodiment, the execution unit includes an electromagnetic three-way valve electrically connected to the fire host. The electromagnetic three-way valve is in a first state or a second state according to the electrical signal of the fire host. In the first state, the connecting part and the detection part are connected, and in the second state, the connecting part and the execution unit are connected.

[0039] In this embodiment, the execution unit includes a fire-fighting agent injection component that injects fire-fighting agents into the PACK. The electromagnetic three-way valve can serve as a backup control valve for the control valve of the execution unit, and is used to prevent the execution unit from mistakenly performing fire-fighting operations when the fire host does not determine an abnormality, thereby avoiding damage to the normal PACK.

[0040] In other embodiments, the electromagnetic three-way valve can also directly serve as a control valve of the execution unit, that is, directly controlling the execution of the fire-fighting action. Once the electromagnetic three-way valve is in the second state, the fire-fighting agent injection component will inject the fire-fighting agent into the PACK.

[0041] In this embodiment, the electromagnetic three-way valve in the second state when power is lost can allow the operator to manually open the execution unit, that is, manually start the agent injection.

[0042] In the above embodiment where the electromagnetic three-way valve is used as a direct control valve, the electromagnetic three-way valve is in the second state when it loses power, that is, the execution unit is automatically executed to perform the fire-fighting action when the fire-fighting system fails.

[0043] In this embodiment, the execution unit is connected to the connecting piece and performs fire-fighting actions through the connecting piece, that is, it can be used to connect the PACK and the detection piece, and can also be used to connect the PACK and the execution unit. This solution is beneficial to reducing the number of parts and merging pipelines, thereby reducing costs.

[0044] In this embodiment, a plurality of interconnected through holes pointing in different directions are provided on one side of the connector close to the interior of the PACK, so that the connector can collect gas from different areas inside the PACK and spray the fire-fighting agent to different areas.

[0045] like Figure 4 ,Example 2 is basically the same as Example 1, except that the connectors of multiple PACKs are connected in parallel to a detection component, and when a fire-fighting action is triggered, fire-fighting is performed on all parallel PACKs, that is, PACK-level detection and cluster-level fire-fighting are achieved.

[0046] Example 3 is an energy storage container, including the energy storage container fire protection system of Example 1, with all its beneficial effects.

[0047] All components used in this application (without specific structural descriptions) are standard components or components known to those skilled in the art. Their structures and principles are readily known to those skilled in the art through technical manuals or routine experimental methods. Furthermore, the software programs involved in this application are all prior art, and this application does not involve any improvements to the software programs.

[0048] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0050] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific embodiments of the present invention are not limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the scope of protection of the present invention.

Claims

1. An energy storage container fire protection system, characterized in that: The energy storage container includes multiple PACKs; The energy storage container fire protection system includes: a gas detection unit, a fire protection host and an execution unit; The gas detection unit includes a connector corresponding to each of the PACKs, and a detection component connected to the connector via a pipeline; the connector connects the PACK and the pipeline; the detection component is arranged inside the container body, detects gas characteristics of thermal runaway of the PACK and generates a detection signal; The fire host is electrically connected to the detection component and the execution unit, receives the detection signal and determines whether to control the execution unit to perform a fire action according to the detection signal.

2. The energy storage container fire protection system according to claim 1, characterized in that: The gas detection unit includes a fan, which sends the gas in the pipeline into the detection element.

3. The energy storage container fire protection system according to claim 1, characterized in that: The detection component includes a gas tank and a sensor. The gas tank is used to collect gas, and the sensor is arranged in the gas tank.

4. The energy storage container fire protection system according to claim 3, characterized in that: The sensor is a combustible gas concentration detector.

5. The energy storage container fire protection system according to claim 1, characterized in that: The execution unit includes an electromagnetic three-way valve electrically connected to the fire host. The electromagnetic three-way valve is in a first state or a second state according to the electrical signal of the fire host. In the first state, the connecting member and the detection member are connected, and in the second state, the connecting member and the execution unit are connected.

6. The energy storage container fire protection system according to claim 5, characterized in that: The electromagnetic three-way valve is in the second state when power is lost.

7. The energy storage container fire protection system according to claim 1, characterized in that: The execution unit includes a fire-fighting agent spraying component capable of spraying a fire-fighting agent into the PACK.

8. The energy storage container fire protection system according to claim 1, characterized in that: The execution unit is connected to the connecting member and executes a fire-fighting action through the connecting member.

9. The energy storage container fire protection system according to claim 1, characterized in that: The connecting piece is detachably connected to the PACK.

10. An energy storage container, characterized in that: The energy storage container fire protection system comprises the energy storage container fire protection system according to any one of claims 1 to 9.

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