Battery pack level fire extinguishing system with anti-explosion and ventilation functions

Abstract

The utility model relates to the technical field of battery energy storage, and discloses a battery pack level fire extinguishing system with anti-explosion and ventilation functions. The battery pack level fire extinguishing system comprises an anti-explosion ventilation connector, a connecting pipe, a battery cluster level fire extinguishing main pipe, a composite detector, a control valve and a fire extinguishing main body, the fire extinguishing main body comprises a fire extinguishing controller and a fire extinguishing agent supply mechanism, and the anti-explosion ventilation connector is arranged on a battery pack and connected with the connecting pipe; all the battery packs of the whole cluster are connected with the same connecting pipe, and the connecting pipe is connected with a fire-fighting agent supply mechanism through a battery cluster level fire-fighting main pipe. According to the battery pack level fire extinguishing system, the condition of gas in the whole cluster of battery packs is monitored through the composite sensor, and when the gas in the battery packs triggers a fire extinguishing spraying threshold value, fire extinguishing agents are sprayed into the battery packs through the anti-explosion ventilation connectors to extinguish fire, so that the number of fire extinguishing parts is reduced, and the cost is reduced; and the reliability of the fire extinguishing system is improved.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to battery energy storage technology field, concretely relates to a kind of battery pack level fire extinguishing systems with explosion-proof ventilation function. BACKGROUND

[0002] Battery energy storage system (Battery Energy Storage System, for short BESS) is a system using lithium battery / lead battery as energy storage carrier, stores electric energy within a certain time and supplies electric energy within a certain time, and the electric energy provided has the functions of smooth transition, peak clipping, frequency modulation and voltage regulation.

[0003] At present, the fire extinguishing system of battery energy storage system generally has container level detection and fire extinguishing, battery cluster level detection and fire extinguishing, battery pack level detection and fire extinguishing and other schemes. For the battery pack with protection, only the fire extinguishing system of battery pack level detection and fire extinguishing can timely and effectively give early warning and extinguish the fire in the battery pack.

[0004] The present inventor finds that the fire extinguishing system of battery pack level detection and fire extinguishing for the battery energy storage system at present has more fire extinguishing parts, and the material cost and installation cost are both high. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a kind of battery pack level fire extinguishing systems with explosion-proof ventilation function to solve the problems in the above background.

[0006] The utility model embodiment provides a kind of battery pack level fire extinguishing systems with explosion-proof ventilation function, applied to battery energy storage system, the battery energy storage system includes: multiple battery clusters, each battery cluster includes multiple battery packs, including: explosion-proof ventilation connector, connecting pipe, battery cluster level fire extinguishing main pipe, composite detector, control valve and fire extinguishing main body;

[0007] The fire extinguishing main body includes: fire extinguishing controller and fire extinguishing agent supply mechanism, and the fire extinguishing controller is electrically connected with the fire extinguishing agent supply mechanism;

[0008] The number of connecting pipes corresponds to the number of multiple battery clusters.

[0009] The explosion-proof ventilation connector has explosion-proof ventilation function, and multiple explosion-proof ventilation connectors are provided, and multiple explosion-proof ventilation connectors are respectively arranged on multiple battery packs.

[0010] The explosion-proof ventilation connector is connected with the connecting pipe, and all battery packs of each battery cluster are connected with the same connecting pipe, and the connecting pipe of each cluster is connected on the battery cluster level fire extinguishing main pipe, and the battery cluster level fire extinguishing main pipe is connected with the fire extinguishing agent supply mechanism, so that fire extinguishing agent can be sprayed into all battery packs.

[0011] The composite sensor and the cluster-level control valve are provided on the connecting pipe, and the composite sensor and the cluster-level control valve are electrically connected to the fire controller respectively. The cluster-level control valve is used to control the on-off connection between the entire cluster battery pack and the battery cluster-level fire main pipe. The composite sensor is used to send a signal to the fire controller when it detects that the gas in the connecting pipe triggers a fire spray signal. The fire controller is used to open the cluster-level control valve on the corresponding connecting pipe and the fire agent supply mechanism.

[0012] Based on the above scheme, it can be known that the battery pack-level fire protection system with explosion-proof and ventilation function of the utility model is provided with explosion-proof and ventilation joints, connecting pipes, battery cluster-level fire main pipes, composite detectors, control valves and fire protection bodies. The fire protection body includes: a fire controller and a fire agent supply mechanism. The explosion-proof and ventilation joints have explosion-proof and ventilation functions. The explosion-proof and ventilation joints are respectively provided on the battery packs and connected to the connecting pipes. All battery packs of each battery cluster are connected to the same connecting pipe. The connecting pipe is connected to the battery cluster-level fire main pipe. The battery cluster-level fire main pipe is connected to the fire agent supply mechanism. A composite sensor and a cluster-level control valve are provided on the connecting pipe. The composite sensor and the cluster-level control valve are respectively electrically connected to the fire controller. The utility model provides a battery pack-level fire protection system with explosion-proof and ventilated functions. The inner cavities of all battery packs in the entire cluster are connected to the same connecting pipe. The gas conditions in the packs of all battery packs in the entire cluster can be monitored in real time by a composite sensor. When the composite sensor detects that gas is generated in the battery pack and the fire spraying threshold is triggered, a fire spraying signal is sent to the fire controller. The fire controller controls the cluster-level control valve on the corresponding connecting pipe to open, and at the same time controls the fire agent supply mechanism to open. The fire agent is sprayed into the battery pack through the explosion-proof and ventilated joint to spray and extinguish the fire of all battery packs in the entire cluster. If the battery cells in the battery pack generate a large amount of gas due to fire or other reasons, which increases the pressure in the battery pack, when the pressure reaches the threshold of the explosion-proof and ventilated joint, the explosion-proof mechanism of the explosion-proof and ventilated joint opens, and the pressure in the battery pack is released in time to prevent the battery pack from bursting. The internal cavities of all battery packs in the entire cluster are connected to the same connecting pipe through explosion-proof and breathable joints, and then monitored by a composite sensor. This not only achieves battery pack-level detection and fire extinguishing effects, but also reduces the number of fire-fighting components such as fire sprinklers and composite detectors, reduces material and installation costs, and improves the reliability of the fire-fighting system.

[0013] In a feasible solution, the explosion-proof vent joint is provided with a connecting joint, and the connecting joint is used to be connected to the connecting pipe.

[0014] In a feasible solution, the connecting pipe is a retractable hose.

[0015] In a feasible solution, further comprising: a container level fire control main pipe and a container level detector;

[0016] The container level fire control main pipe is connected with the fire extinguishing agent supply mechanism;

[0017] A plurality of spray heads are arranged on the container level fire control main pipe, and the spray range of the plurality of spray heads covers all battery packs;

[0018] A container level control valve is arranged on the container level fire control main pipe, and is used for controlling the on-off of all spray heads;

[0019] The container level control valve and the container level detector are electrically connected with the fire control controller respectively. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0021] Figure 1 It is a schematic diagram of the battery pack level fire control system with explosion-proof ventilation function in the embodiment of the present application.

[0022] Figure 2 It is a connection diagram of the battery pack and the connecting pipe in the embodiment of the present application.

[0023] Reference numerals in the drawings:

[0024] 1, explosion-proof ventilation joint; 2, connecting pipe; 21, composite sensor; 22, cluster level control valve; 3, battery cluster level fire control main pipe; 4, fire control main body; 5, container level fire control main pipe; 51, container level control valve; 100, battery pack. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, can also be detachable connection, can also be integrated; it can be mechanical connection, can also be electrical connection, can also be communication connection; it can be direct connection, can also be indirect connection through an intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] The technical scheme of the utility model will be described in detail below with specific examples. The following several specific examples can be combined with each other, and the same or similar concepts or processes can not be described in some examples.

[0029] As described in the background of the application, the fire extinguishing system of the battery energy storage system generally has container level detection and fire extinguishing, battery cluster level detection and fire extinguishing, battery pack level detection and fire extinguishing and the like. For the protected battery pack, only the battery pack level detection and fire extinguishing fire extinguishing system can timely and effectively give early warning and extinguish the fire in the battery pack.

[0030] The present application discloses a battery pack level detection and fire extinguishing fire extinguishing system for a battery energy storage system.

[0031] In order to solve the above problems, the present application provides the technical scheme, and the specific implementation is as follows:

[0032] Figure 1 A schematic view of the battery pack level fire extinguishing system with explosion-proof ventilation function in the embodiment of the utility model, Figure 2 A schematic view of the connection between the battery pack and the connecting pipe in the embodiment of the utility model.

[0033] As Figure 1 And Figure 2As shown, the battery pack level fire extinguishing system with explosion-proof ventilation function in the embodiment is applied to a battery energy storage system, which comprises a plurality of (M) battery clusters, each of which comprises a plurality of (N) battery packs 100, and the plurality of battery packs 100 of each battery cluster are arranged in a cluster in a horizontal direction or in a vertical direction, and the arrangement is specifically selected according to the arrangement requirement of the battery energy storage system, and all the battery packs 100 are arranged in a matrix. The battery packs in the embodiment are arranged in a cluster in a horizontal direction.

[0034] The battery pack level fire extinguishing system comprises an explosion-proof ventilation joint 1, a connecting pipe 2, a battery cluster level fire extinguishing main pipe 3, a composite detector 21, a cluster level control valve 22, and a fire extinguishing main body 4.

[0035] The fire extinguishing main body 4 comprises a fire extinguishing controller and a fire extinguishing agent supply mechanism, etc., the fire extinguishing controller is electrically connected with the fire extinguishing agent supply mechanism, and the fire extinguishing controller controls the opening and closing of the fire extinguishing agent supply mechanism.

[0036] The connecting pipe 2 is provided with a plurality of connecting pipes 2, and the number of the connecting pipes 2 corresponds to the number of the plurality of battery clusters.

[0037] The explosion-proof ventilation joint 1 is provided with a plurality of explosion-proof ventilation joints 1, and the plurality of explosion-proof ventilation joints 1 are arranged on the plurality of battery packs 100, each battery pack 100 is provided with an explosion-proof ventilation joint 1, and the explosion-proof ventilation joint 1 is connected with the internal cavity of the battery pack 100.

[0038] The explosion-proof ventilation joint 1 is connected with and communicates with the connecting pipe 2, and all the battery packs 100 of the same cluster are connected on the same connecting pipe 2 through the explosion-proof ventilation joint 1, so that the internal cavities of all the battery packs 100 of the same cluster are connected with the same connecting pipe 2.

[0039] The battery packs 100 of different clusters are connected with different connecting pipes 2, that is, the battery packs 100 of different clusters are connected on different connecting pipes 2.

[0040] One end of the plurality of connecting pipes 2 is connected on the battery cluster level fire extinguishing main pipe 3, the battery cluster level fire extinguishing main pipe 3 is connected with and communicates with the fire extinguishing agent supply mechanism of the fire extinguishing main body 4, so as to realize the communication between all the battery packs 100 and the fire extinguishing agent supply mechanism, and the fire extinguishing agent can enter the internal cavities of all the battery packs 100.

[0041] The explosion-proof ventilation joint 1 has an explosion-proof ventilation function, and the connecting pipe 2 and the internal cavity of the battery pack 100 are communicated through the explosion-proof ventilation joint 1; and when the internal pressure of the battery pack is too large, the explosion-proof mechanism of the explosion-proof ventilation joint 1 is opened to release the pressure of the battery pack.

[0042] Each connecting pipe 2 is provided with a composite sensor 21 and a cluster control valve 22, the cluster control valve 22 is arranged at the end of the connecting pipe 2 between the whole cluster battery pack 100 and the battery cluster control valve 3, the cluster control valve 22 is used to control the on-off between the whole cluster battery pack 100 and the battery cluster control valve 3, and the composite sensor 21 monitors the gas condition in the cavity of the whole cluster battery pack 100.

[0043] The composite sensor 21 and the cluster control valve 22 are respectively electrically connected with the fire control controller of the fire main body 4.

[0044] In the embodiment, all the battery packs in each cluster are connected with the connecting pipe through the explosion-proof gas joint, and the composite sensor and the cluster control valve are arranged on each connecting pipe.

[0045] The composite sensor can monitor the gas condition in all the battery packs in the whole cluster in real time. When the battery cell in the battery pack generates gas due to thermal runaway or other reasons, the composite sensor detects the gas concentration in the connecting pipe (battery pack) to trigger the fire spraying threshold, sends the fire spraying signal to the fire control controller, and the fire control controller receives the fire spraying signal to control the cluster control valve on the corresponding connecting pipe to open and control the fire extinguishing agent supply mechanism to open. The fire extinguishing agent is transported into all the battery packs in the corresponding battery cluster through the battery cluster control valve, the connecting pipe and the explosion-proof gas joint, and the battery packs are extinguished to achieve the effect of battery pack level detection and fire extinguishing. If the battery cell in the battery pack generates a large amount of gas due to fire or other reasons, the pressure in the battery pack increases, and when the pressure reaches the threshold of the explosion-proof gas joint, the explosion-proof mechanism of the explosion-proof gas joint opens to release the pressure in the battery pack in time to prevent the battery pack from exploding.

[0046] It can be found from the above that the battery pack level fire extinguishing system with explosion-proof ventilation function has the following advantages. The explosion-proof ventilation joint, the connecting pipe, the battery cluster level fire main pipe, the composite detector, the control valve and the fire main body are arranged. The fire main body includes a fire control unit and a fire agent supply mechanism. The explosion-proof ventilation joints are arranged on the battery pack and connected with the connecting pipe. All the battery packs of each battery cluster are connected with the same connecting pipe. The connecting pipe is connected with the battery cluster level fire main pipe. The battery cluster level fire main pipe is connected with the fire agent supply mechanism. The composite sensor and the cluster level control valve are arranged on the connecting pipe and electrically connected with the fire control unit. The battery pack level fire extinguishing system with explosion-proof ventilation function can realize the real-time monitoring of the gas condition in the battery pack by the composite sensor. When the composite sensor detects that the gas is generated in the battery pack and the fire spraying threshold is triggered, the fire spraying signal is sent to the fire control unit. The fire control unit controls the opening of the cluster level control valve on the corresponding connecting pipe and controls the opening of the fire agent supply mechanism. The fire agent is sprayed into the battery pack through the explosion-proof ventilation joint to spray and extinguish the fire of all the battery packs. When the pressure in the battery pack is increased due to the generation of a large amount of gas in the battery cell caused by fire and the like, the explosion-proof mechanism of the explosion-proof ventilation joint is opened when the pressure reaches the threshold of the explosion-proof ventilation joint, so that the pressure in the battery pack is released in time to prevent the explosion of the battery pack. The internal cavities of all the battery packs of the battery cluster are connected with the same connecting pipe through the explosion-proof ventilation joint, and are monitored by a composite sensor. The battery pack level detection and fire extinguishing effect are achieved. The number of fire extinguishing components such as the fire nozzle and the composite detector is reduced, the material and installation costs are reduced, and the reliability of the fire extinguishing system is improved.

[0047] Optionally, the explosion-proof ventilation joint 1 in the battery pack level fire extinguishing system with explosion-proof ventilation function is provided with a connecting joint to facilitate the connection of the explosion-proof ventilation joint 1 with the connecting pipe 2.

[0048] Further, the connecting pipe 2 in the battery pack level fire extinguishing system with explosion-proof ventilation function is a telescopic hose.

[0049] The connecting joint of the explosion-proof ventilation joint 1 is in the form of an elbow or a tee. The connecting joints of the explosion-proof ventilation joints 1 on the adjacent two battery packs 100 are connected by the telescopic hoses. The plurality of telescopic hoses form the telescopic connecting pipe 2 to facilitate the adjustment of the assembly error of the battery packs 100 in the same cluster. When the pressure in a certain battery pack 100 is too large to open the explosion-proof mechanism of the explosion-proof ventilation joint 1, the connecting pipe 2 can be correspondingly bent and deformed, so that the overall pipeline is not damaged and the pipeline continues to be unobstructed.

[0050] Optionally, the battery pack level fire extinguishing system with explosion-proof ventilation function in the embodiment further comprises a container level fire main 5 and a container level detector.

[0051] One end of the container level fire main 5 is connected and communicated with the battery cluster level fire main 3, so that the container level fire main 5 is communicated with the fire extinguishing agent supply mechanism of the fire main body 4.

[0052] The container level fire main 5 is provided with a plurality of spray heads (not shown in the figure), and the spray range of the plurality of spray heads covers all the battery packs of the battery energy storage system.

[0053] The container level fire main 5 is provided with a container level control valve 51 at the end thereof, the container level control valve 51 is electrically connected with the fire control controller of the fire main body 4, and the opening and closing of all the spray heads on the container level fire main 5 is controlled by the container level control valve 51.

[0054] The container level detector (not shown in the figure) is arranged at a suitable position of the battery energy storage system and is electrically connected with the fire control controller of the fire main body 4, and the container level detector is used for monitoring the fire condition of the entire battery energy storage system.

[0055] In the embodiment, when a fire occurs in the battery energy storage system and triggers the container level detector, the container level detector sends a signal to the fire control controller, the fire control controller controls the container level control valve to be opened, and simultaneously controls the fire extinguishing agent supply mechanism to be opened, so as to perform container level fire extinguishing action on the battery packs of the entire battery energy storage system.

[0056] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first feature and the second feature, or indirect contact between the first feature and the second feature through an intermediate medium.

[0057] Moreover, the first feature is "on", "above" and "on" the second feature, which can be directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature, which can be directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0058] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0059] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack level fire extinguishing system with explosion-proof ventilation function, applied to a battery energy storage system, the battery energy storage system comprising: A plurality of battery clusters, each of which comprises a plurality of battery packs, characterized in that it comprises: explosion-proof air vents, connecting pipes, battery cluster level fire control main pipes, composite detectors, control valves and fire control bodies; The fire control body comprises a fire control controller and a fire control agent supply mechanism, and the fire control controller is electrically connected with the fire control agent supply mechanism; The number of connecting pipes corresponds to the number of battery clusters; The explosion-proof air vents have explosion-proof air vent functions and are provided in multiple numbers, and the multiple explosion-proof air vents are respectively arranged on the multiple battery packs; The explosion-proof air vents are connected with the connecting pipes, and all battery packs of each battery cluster are connected with the same connecting pipe, and the connecting pipes of each cluster are respectively connected with the battery cluster level fire control main pipes, and the battery cluster level fire control main pipes are connected with the fire control agent supply mechanism, so that the fire control agent can be sprayed into all battery packs; The connecting pipes are provided with the composite sensors and the cluster level control valves, and the composite sensors and the cluster level control valves are respectively electrically connected with the fire control controller, the cluster level control valve is used for controlling the on-off of the whole cluster battery pack and the battery cluster level fire control main pipe, and the composite sensor is used for sending a signal to the fire control controller when detecting that the gas in the connecting pipe triggers a fire control spraying signal, and the fire control controller is used for opening the cluster level control valve on the corresponding connecting pipe and the fire control agent supply mechanism.

2. The battery pack level fire extinguishing system with explosion-proof ventilation function according to claim 1, characterized in that, The explosion-proof air vents are provided with connecting joints for connecting with the connecting pipes.

3. The battery pack level fire extinguishing system with anti-explosion and ventilation function according to claim 2, characterized in that, The connecting pipes are telescopic hoses.

4. The battery pack level fire extinguishing system with explosion-proof ventilation function according to claim 1, characterized in that, Further comprising: A container level fire control main pipe and a container level detector; The container level fire control main pipe is connected with the fire control agent supply mechanism; The container level fire control main pipe is provided with a plurality of spray heads, and the spray range of the plurality of spray heads covers all battery packs; The container level fire control main pipe is provided with a container level control valve for controlling the on-off of all spray heads; The container level control valve and the container level detector are respectively electrically connected with the fire control controller.

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