Fire fighting system of vehicle-mounted battery pack and railway vehicle

Abstract

The invention provides a fire extinguishing system of a vehicle-mounted battery pack and a railway vehicle. And the target battery cluster monitors whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than a preset dosage. If it is monitored that the dosage of the first fire extinguishing agent is not larger than the preset dosage, the target battery cluster sends a first request signal to a master control unit, and the master control unit obtains the first request signal. Wherein the target battery cluster is a faulted battery cluster in the plurality of battery clusters. Thus, according to the first request signal, the master control unit controls the fire fighting system to enter a multi-cluster fire fighting joint control mode, the second fire extinguishing agent in the supplementary battery cluster is supplemented into the target battery cluster, and the target battery cluster is made to process the fault through the first fire extinguishing agent and the second fire extinguishing agent till the fault is removed, the compensation battery clusters are other battery clusters except the target battery cluster in the plurality of battery clusters. Therefore, the fire fighting system can improve the fire fighting capability of the target battery cluster without increasing the dosage of the first fire extinguishing agent, so that the cost of the fire fighting system is reduced.

Description

Technical Field

[0001] The present application relates to the field of fire fighting technology, and in particular to a fire fighting system of a vehicle-mounted battery pack and a rail vehicle. Background Art

[0002] With the development of the new energy industry, more and more vehicles are beginning to use lithium batteries as power sources, and many rail vehicles are also beginning to explore the use of lithium batteries to replace traditional internal combustion engines as power sources. Since rail vehicles have certain requirements for cruising range. Therefore, compared with other electric vehicles, rail vehicles have a higher demand for built-in lithium battery power, usually at the megawatt level. As the number of lithium batteries in rail vehicles increases, the safety of rail vehicles has received more and more attention. Based on this, how to design a stable and reliable fire protection system on rail vehicles has become a critical technical issue in the industry.

[0003] At present, most of the onboard battery packs of rail vehicles adopt the integration mode of multiple battery clusters in parallel. Since this integration mode of multiple battery clusters in parallel is similar to the integration mode of commercial energy storage. Therefore, the fire protection system of the onboard battery pack continues to use the fire protection system of commercial energy storage, that is, multiple battery clusters share a fire protection unit in the fire protection system, which makes the fire protection system have the advantage of low development cost. However, due to a series of vibrations during the operation of rail vehicles, it is difficult for the energy storage components of the energy storage power station in commercial energy storage to meet the working conditions of such vibrations. Therefore, the fire protection system of the onboard battery pack adopts the fire protection system of the bus, that is, one battery cluster is configured with one fire protection unit in the fire protection system, and the fire protection units between battery clusters are independent of each other and do not interfere with each other.

[0004] However, the amount of fire extinguishing agent in the fire fighting unit of a single battery cluster in the fire fighting system of the bus is limited. Therefore, it is very likely that the fire extinguishing agent in the fire fighting unit of a single battery cluster is used up and the fire is still not under control, resulting in a low fire fighting capability of a single battery cluster. Summary of the invention

[0005] The present application provides a fire fighting system of an on-board battery pack and a rail vehicle, which can improve the fire fighting and extinguishing capability of a single battery cluster.

[0006] In a first aspect, the present application provides a fire fighting system of a vehicle-mounted battery pack, the fire fighting system comprising: a master control unit and a plurality of battery clusters;

[0007] The master control unit is connected to the plurality of battery clusters, each of the plurality of battery clusters is connected in parallel, and each of the battery clusters is connected via a fire protection pipeline;

[0008] a target battery cluster, used to monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than a preset dosage, the target battery cluster being a battery cluster with a fault among the multiple battery clusters; if it is monitored that the dosage of the first fire extinguishing agent is greater than the preset dosage, the first fire extinguishing agent is used to process the fault until the fault is resolved; if it is monitored that the dosage of the first fire extinguishing agent is not greater than the preset dosage, a first request signal is sent to the main control unit;

[0009] The main control unit is used to control the fire protection system to enter a multi-cluster fire protection joint control mode according to the first request signal until the fault is eliminated; the multi-cluster fire protection joint control mode means that the second fire extinguishing agent in the compensation battery cluster is supplemented to the target battery cluster, and the compensation battery cluster is other battery clusters among the multiple battery clusters except the target battery cluster.

[0010] Through the fire protection system of the vehicle-mounted battery pack provided by the first aspect, the target battery cluster can monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than the preset dosage. If it is monitored that the dosage of the first fire extinguishing agent is not greater than the preset dosage, the target battery cluster can send a first request signal to the main control unit so that the main control unit can obtain the first request signal. Among them, the target battery cluster is a battery cluster with a fault among multiple battery clusters. In this way, the main control unit can control the fire protection system to enter the multi-cluster fire protection joint control mode according to the first request signal, and replenish the second fire extinguishing agent in the supplementary battery cluster to the target battery cluster, so that the target battery cluster can use the first fire extinguishing agent and the second fire extinguishing agent to handle the fault until the fault is resolved, wherein the compensation battery cluster is other battery clusters among the multiple battery clusters except the target battery cluster. Thereby, the fire protection system can improve the fire protection capability of the target battery cluster without increasing the dosage of the first fire extinguishing agent, thereby reducing the cost of the fire protection system.

[0011] In a possible design, the target battery cluster is further configured to send a second request signal to the master control unit when it is detected that the fault has not been resolved and the dosage of the first fire extinguishing agent is not greater than the preset dosage;

[0012] The master control unit is further used to control the fire protection system to enter the multi-cluster fire protection joint control mode according to the second request signal until the fault is resolved.

[0013] In a possible design, when the fire protection system is in the multi-cluster fire protection joint control mode, the multiple battery clusters include a first battery cluster, a second battery cluster and a third battery cluster, wherein:

[0014] The master control unit is further configured to determine, according to the first request signal or the second request signal, that the first battery cluster is the target battery cluster, the second battery cluster and the third battery cluster are the other battery clusters, and start the fire host in the second battery cluster and the third battery cluster;

[0015] The second battery cluster is used to send a first signal to the main control unit after the fire host in the second battery cluster is started, and the first signal is used to represent the dosage of the fire extinguishing agent in the second battery cluster;

[0016] The third battery cluster is used to send a second signal to the main control unit after the fire host in the third battery cluster is started, and the second signal is used to represent the dosage of the fire extinguishing agent in the third battery cluster;

[0017] The master control unit is further used to determine a supplementary battery cluster from the second battery cluster and the third battery cluster according to the first signal and the second signal and in accordance with the principle of being closest to the first battery cluster, and the supplementary battery cluster is the second battery cluster and / or the third battery cluster.

[0018] In a possible design, the master control unit is specifically configured to, based on the first signal and the second signal, determine the second battery cluster or the third battery cluster as the supplementary battery cluster when it is determined that the dosage of the fire extinguishing agent in the second battery cluster or the dosage of the fire extinguishing agent in the third battery cluster is greater than the preset dosage;

[0019] or,

[0020] The main control unit is specifically used to determine the second battery cluster and the third battery cluster as the supplementary battery cluster when it is determined that the dosage of the fire extinguishing agent in the second battery cluster and the dosage of the fire extinguishing agent in the third battery cluster are not greater than the preset dosage based on the first signal and the second signal.

[0021] In a possible design, any battery cluster includes: a fire host, a fire controller and a plurality of battery boxes, wherein the fire host stores a fire extinguishing agent;

[0022] The fire host is connected to the master control unit, the fire controller and the multiple battery boxes respectively, the fire controller is also connected to the fire pipeline, and the multiple battery boxes are connected in series;

[0023] When the fire protection system is in the multi-cluster fire protection joint control mode, and any one of the battery clusters is the target battery cluster, wherein:

[0024] The fire host is used to control the output valve and the supplementary valve of the fire controller to open, and receive the second fire extinguishing agent after the output valve and the supplementary valve of the fire controller are opened;

[0025] The fire host is further used to deliver the second fire extinguishing agent and the first fire extinguishing agent to the target battery box, and the target battery box is a battery box among the multiple battery boxes where the fault occurs;

[0026] The target battery box is used to process the fault by using the second fire extinguishing agent and the first fire extinguishing agent, and send the fire parameter information of the target battery box to the fire host;

[0027] The fire host is also used to control the output valve and the supplementary valve of the fire controller to close when it is detected that the fault is resolved based on the fire parameter information, so as to stop processing the fault and generate the second request signal.

[0028] In a possible design, when the fire protection system is in the multi-cluster fire protection joint control mode, and any one of the battery clusters is the other battery cluster, wherein:

[0029] The fire host is used to start after receiving the feedback signal of the first request signal or the feedback signal of the second request signal sent by the main control unit, and send the stored dosage of the fire extinguishing agent to the main control unit, so that the main control unit determines whether to replenish the battery cluster;

[0030] The fire host is further used to control the replenishment valve of the fire controller to open after the main control unit determines that the battery cluster is replenished, so that the fire extinguishing agent stored in the fire host is the second fire extinguishing agent;

[0031] The fire host is also used to close the supplementary valve of the fire controller after the fault is eliminated.

[0032] In a possible design, when any one of the battery clusters is the target battery cluster and the dosage of the first fire extinguishing agent is greater than the preset dosage, wherein:

[0033] The fire host is used to control the output valve of the fire controller to open and deliver the first fire extinguishing agent to the target battery box;

[0034] The target battery box is used to process the fault using the first fire extinguishing agent and send fire parameter information of the target battery box to the fire host;

[0035] The fire host is also used to control the output valve of the fire controller to close when it detects that the fault is resolved based on the fire parameter information, so as to stop processing the fault.

[0036] In one possible design, the fire controller includes: a control valve and a puncture valve;

[0037] The first valve of the control valve is connected to the fire host and the puncture valve respectively, the second valve of the control valve is connected to the fire pipeline, and the puncture valve is also connected to the multiple battery boxes one by one through multiple built-in solenoid valves. The first valve of the control valve and any one of the multiple solenoid valves are the output valves of the fire controller, and the second valve of the control valve is the supplementary valve of the fire controller.

[0038] In a possible design, the number of the first valves of the control valve is 2, and the number of the second valves of the control valve is 1 or 2.

[0039] In a second aspect, the present application provides a rail vehicle, the rail vehicle comprising: a vehicle body, an on-board battery pack disposed at the bottom of the vehicle body, and a fire fighting system of the on-board battery pack in the first aspect and each possible design of the first aspect;

[0040] The vehicle-mounted battery pack is connected to the fire protection system of the vehicle-mounted battery pack.

[0041] The beneficial effects of the rail vehicle provided in the above-mentioned second aspect and each possible design of the above-mentioned second aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and each possible implementation method of the first aspect, and will not be repeated here.

[0042] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 A schematic diagram of the structure of a fire protection system of a vehicle-mounted battery pack provided in an embodiment of the present application;

[0045] Figure 2A schematic diagram of the working process of a fire protection system of a vehicle-mounted battery pack provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the working process of a fire protection system of a vehicle-mounted battery pack in a multi-cluster fire protection joint control mode provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the working process of another fire protection system of a vehicle-mounted battery pack provided in an embodiment of the present application in a multi-cluster fire protection joint control mode;

[0048] Figure 5 A schematic diagram of the working process of another fire protection system of a vehicle-mounted battery pack in a multi-cluster fire protection joint control mode provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In this application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c alone can represent: a, b, c, a and b, a and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0050] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0051] The terms "connected" and "connected" should be understood in a broad sense. For example, the "connected" or "connected" of a circuit structure can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] Reference Figure 1 , Figure 1 The structural diagram of a fire fighting system of a vehicle-mounted battery pack provided in an embodiment of the present application is shown in the figure. As shown in the figure, the fire fighting system 100 may include: a master control unit 110 and a plurality of battery clusters 120 .

[0053] The master control unit 110 is connected to a plurality of battery clusters 120 , and each of the plurality of battery clusters 120 is connected in parallel, and each of the battery clusters 120 is connected via a fire protection pipeline.

[0054] The master control unit 110 and the plurality of battery clusters 120 may be provided separately or integrated, which is not specifically limited in the embodiment of the present application.

[0055] For ease of explanation, Figure 1 Only three battery clusters 120 and five battery boxes in the battery clusters 120 are shown. The three battery clusters 120 are battery cluster 120-1, battery cluster 120-2, and battery cluster 120-3.

[0056] The target battery cluster can monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than a preset dosage. If the dosage of the first fire extinguishing agent is not greater than the preset dosage, the target battery cluster can send a first request signal to the main control unit 110 so that the main control unit 110 can obtain the first request signal.

[0057] The target battery cluster is a faulty battery cluster 120 among the multiple battery clusters 120. The fault usually refers to a fire.

[0058] The battery cluster determines the relationship between the dosage of the fire extinguishing agent and the preset dosage by monitoring whether the pressure in the agent tank for storing the fire extinguishing agent is greater than the preset pressure value. When the pressure in the agent tank for storing the fire extinguishing agent is greater than the preset pressure value, the dosage of the fire extinguishing agent is greater than the preset dosage. When the pressure in the agent tank for storing the fire extinguishing agent is not greater than the preset pressure value, the dosage of the fire extinguishing agent is not greater than the preset dosage.

[0059] In this way, the main control unit 110 can control the fire protection system 100 to enter the multi-cluster fire protection joint control mode according to the first request signal until the fault is eliminated. Since the fire extinguishing dosage in other battery clusters is still sufficient. Therefore, in the multi-cluster fire protection joint control mode, the second fire extinguishing agent in the compensation battery cluster can be added to the target battery cluster, so that the target battery cluster can use the first fire extinguishing agent and the second fire extinguishing agent to handle the fault until the fault is eliminated. Therefore, the fire protection system 100 can improve the fire protection capability of the target battery cluster without increasing the dosage of the first fire extinguishing agent, thereby reducing the cost of the fire protection system 100.

[0060] The multi-cluster fire fighting joint control mode refers to the second fire extinguishing agent in the compensation battery cluster being supplemented into the target battery cluster, and the compensation battery cluster is other battery clusters among the multiple battery clusters 120 except the target battery cluster.

[0061] Among them, the method of fire extinguishing agent to deal with faults is point spraying.

[0062] When the processing of the fault stops, the target battery cluster sends a signal indicating that the fault is resolved, that is, a fire extinguishing completion message, to the main control unit 110 .

[0063] After the fault is eliminated, the fire protection system 100 is in standby mode.

[0064] In some examples, the fire protection system 100 may further include: a vehicle controller.

[0065] When a fault occurs, the target battery cluster can report fault information about the fault to the main control unit 110, so that the main control unit 110 can obtain the fault information. In this way, the main control unit 110 can send the fault information to the vehicle controller, so that the vehicle controller controls the rail vehicle where the fire protection system 100 is located to stop. Thus, the target battery cluster can monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than the preset dosage.

[0066] If it is monitored that the dosage of the first fire extinguishing agent is greater than the preset dosage, the target battery cluster can use the first fire extinguishing agent to handle the fault until the fault is resolved.

[0067] When it is monitored that the fault has not been resolved and the dosage of the first fire extinguishing agent is not greater than the preset dosage, the target battery cluster may send a second request signal to the main control unit 110 so that the main control unit 110 may obtain the second request signal.

[0068] In this way, the main control unit 110 can control the fire protection system 100 to enter the multi-cluster fire protection joint control mode according to the second request signal until the fault is resolved.

[0069] The fire protection system provided by the present application can monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than the preset dosage. If it is monitored that the dosage of the first fire extinguishing agent is not greater than the preset dosage, the target battery cluster can send a first request signal to the main control unit so that the main control unit can obtain the first request signal. The target battery cluster is a battery cluster that has a fault among multiple battery clusters. In this way, the main control unit can control the fire protection system to enter the multi-cluster fire protection joint control mode according to the first request signal, and replenish the second fire extinguishing agent in the supplementary battery cluster to the target battery cluster, so that the target battery cluster can use the first fire extinguishing agent and the second fire extinguishing agent to handle the fault until the fault is resolved, wherein the compensation battery cluster is other battery clusters among the multiple battery clusters except the target battery cluster. Thereby, the fire protection system can improve the fire protection capability of the target battery cluster without increasing the dosage of the first fire extinguishing agent, thereby reducing the cost of the fire protection system.

[0070] In some examples, when the fire protection system 100 is in the multi-cluster fire protection joint control mode, the plurality of battery clusters 120 may include a first battery cluster, a second battery cluster, and a third battery cluster, wherein:

[0071] The main control unit 110 can determine the first battery cluster as the target battery cluster and the second battery cluster and the third battery cluster as other battery clusters according to the first request signal or the second request signal, and can start the fire host 121 in the second battery cluster and the third battery cluster.

[0072] The first battery cluster may be Figure 1 The battery cluster 120-1 in the embodiment may also be Figure 1 The battery cluster 120-2 in the embodiment may also be Figure 1 The battery cluster 120 - 3 in the embodiment of the present application is not specifically limited to this.

[0073] In this way, after the fire host 121 in the second battery cluster is started, the second battery cluster can send the first signal to the main control unit 110, so that the main control unit 110 can obtain the first signal.

[0074] The first signal is used to represent the dosage of the fire extinguishing agent in the second battery cluster.

[0075] After the fire host 121 in the third battery cluster is started, the third battery cluster can send a second signal to the main control unit 110, so that the main control unit 110 can obtain the second signal.

[0076] The second signal is used to represent the dosage of the fire extinguishing agent in the third battery cluster.

[0077] Furthermore, the main control unit 110 may determine the supplementary battery cluster from the second battery cluster and the third battery cluster according to the first signal and the second signal and in accordance with the principle of being closest to the first battery cluster.

[0078] The supplementary battery cluster is the second battery cluster and / or the third battery cluster.

[0079] For example, the main control unit 110 may determine that the dosage of the fire extinguishing agent in the second battery cluster is greater than a preset dosage based on the first signal and the second signal. In this way, the main control unit 110 may determine the second battery cluster as a supplementary battery cluster.

[0080] Alternatively, the main control unit 110 may determine that the dosage of the fire extinguishing agent in the third battery cluster is greater than a preset dosage based on the first signal and the second signal. In this way, the main control unit 110 may determine the third battery cluster as a supplementary battery cluster.

[0081] Alternatively, the main control unit 110 can determine that the dosage of the fire extinguishing agent in the second battery cluster and the dosage of the fire extinguishing agent in the third battery cluster are not greater than the preset dosage according to the first signal and the second signal. In this way, the main control unit 110 can determine the second battery cluster and the third battery cluster as supplementary battery clusters.

[0082] Based on the description of the above embodiments, a possible implementation of any battery cluster 120 is exemplified. Figure 1 As shown, any battery cluster 120 may include: a fire host 121, a fire controller 122 and a plurality of battery boxes, and the fire host 121 stores fire extinguishing agent.

[0083] The fire host 121 is connected to the main control unit 110, the fire controller 122 and multiple battery boxes respectively. The fire controller 122 is also connected to the fire pipeline. Each of the multiple battery boxes is connected in series.

[0084] The fire extinguishing agent unit for storing the fire extinguishing agent and the conveying unit for conveying the fire extinguishing agent are arranged in the fire host 121. The fire extinguishing agent unit is provided with a medicine tank, and the fire extinguishing agent is stored in the medicine tank.

[0085] A temperature sensor is provided in any battery box. The temperature sensor is used to monitor the data of fire parameter information such as smoke content and temperature in the battery box, and transmit these data to the fire host 121 in real time. When the fire host 121 monitors that the values ​​of these data exceed the corresponding preset thresholds, it is determined that the battery cluster 120 has failed, and the fire system 100 is activated by monitoring the dosage of the first fire extinguishing agent of the failed battery cluster 120, so that the fire extinguishing function is activated.

[0086] When the fire protection system 100 is in the multi-cluster fire protection joint control mode and any battery cluster 120 is a target battery cluster,

[0087] The fire host 121 can control the output valve and the supplementary valve of the fire controller 122 to open. And, after the output valve and the supplementary valve of the fire controller 122 are opened, the fire host 121 can receive the second fire extinguishing agent.

[0088] In this way, the fire host 121 can deliver the second fire extinguishing agent and the first fire extinguishing agent to the target battery box.

[0089] The target battery box is a faulty battery box among the multiple battery boxes.

[0090] In this way, the target battery box can use the second fire extinguishing agent and the first fire extinguishing agent to handle the fault. In addition, the target battery box can send the fire parameter information of the target battery box to the fire host 121, so that the fire host 121 can obtain the fire parameter information of the target battery box.

[0091] In this way, the fire host 121 can control the output valve and the supplementary valve of the fire controller 122 to be closed when it detects that the fault is resolved based on the fire parameter information, so as to stop processing the fault.

[0092] Exemplarily, the fire parameter information generally refers to the temperature in the battery box. When the fire host 121 can determine based on the fire parameter information that the temperature in the battery box continues for a preset time and is lower than a preset temperature threshold, the fire host 121 can determine that the fault is resolved. When the fire host 121 can determine based on the fire parameter information that the temperature in the battery box continues for a preset time or is lower than a preset temperature threshold, the fire host 121 can determine that the fault is not resolved.

[0093] In some examples, when the fire protection system 100 is in the multi-cluster fire protection joint control mode and any battery cluster 120 is another battery cluster, wherein:

[0094] After receiving the feedback signal of the first request signal or the feedback signal of the second request signal sent by the main control unit, the fire host 121 can be started and send the stored dosage of the fire extinguishing agent to the main control unit 110 so that the main control unit 110 determines whether to replenish the battery cluster.

[0095] In this way, after the main control unit 110 determines that the battery cluster is to be supplemented, the fire host 121 can control the supplement valve of the fire controller 122 to open, so that the fire extinguishing agent stored in the fire host 121 is the second fire extinguishing agent.

[0096] After the fault is eliminated, the fire host 121 can close the replenishment valve of the fire controller 122.

[0097] In some examples, when any battery cluster 120 is a target battery cluster and the dosage of the first fire extinguishing agent is greater than a preset dosage, wherein:

[0098] The fire host 121 can control the output valve of the fire controller 122 to open. In addition, the fire host 121 can deliver the first fire extinguishing agent to the target battery box.

[0099] In this way, the target battery box can use the first fire extinguishing agent to handle the fault and send the fire parameter information of the target battery box to the fire host 121.

[0100] In this way, the fire host 121 can control the output valve of the fire controller 122 to close when it detects that the fault is resolved based on the fire parameter information, so as to stop processing the fault.

[0101] In some examples, the fire controller 122 may include: a control valve K and a puncture valve S.

[0102] The first valve of the control valve K is connected to the fire host 121 and the puncture valve S respectively, the second valve of the control valve K is connected to the fire pipeline, and the puncture valve S is also connected to multiple battery boxes one by one.

[0103] Among them, the first valve of the control valve K and the solenoid valve of the puncture valve S are output valves of the fire controller 122, and the second valve of the control valve K is a supplementary valve of the fire controller 122.

[0104] Exemplarily, the number of the first valves of the control valve K is 2, and the number of the second valves of the control valve K is 1 or 2.

[0105] The first valve of the control valve K and the second valve of the control valve K are located in directions perpendicular to each other.

[0106] The first valve of one control valve K is arranged at one side of the fire host 121 where the control valve K is close to, and the first valve of another control valve K is arranged at the other side of the fire host 121 where the control valve K is far away from.

[0107] When the battery cluster 120 is the first battery cluster or the last battery cluster among the multiple battery clusters, the number of the second valves of the control valve K is 1. When the battery cluster 120 is not the first battery cluster or the last battery cluster among the multiple battery clusters, the number of the second valves of the control valve K is 2.

[0108] in, Figure 1 The first valves of the control valve K1, control valve K2 and control valve K3 are represented by numbers 1 and 3, the second valve of the control valve K1 is represented by number 2, the second valve of the control valve K2 is represented by numbers 2 and 4, and the second valve of the control valve K3 is represented by number 2.

[0109] Combine the following Figure 2 , the working process of the fire protection system 100 is described in detail. Figure 2A schematic diagram of the working process of a fire protection system of a vehicle-mounted battery pack provided in an embodiment of the present application.

[0110] like Figure 2 As shown, after the vehicle-mounted battery pack is powered on, the fire host 121 in each battery cluster 120 starts to monitor the fire status in the battery box in each battery cluster 120. If the fire host 121 detects a fault in the battery box, the fire host 121 in the target battery cluster will generate a fire alarm. The battery cluster where the fire host 121 is located is the target battery cluster. If the fire host 121 does not detect a fault in the battery box, the fire host 121 will monitor again at intervals.

[0111] When a fire alarm occurs, the fire host 121 reports the fault information to the master control unit 110, which causes the master control unit 110 to report the fault information to the vehicle controller, so that the rail vehicle where the fire protection system 100 of the on-board battery pack is located stops.

[0112] In this way, the fire host 121 monitors whether the dosage of the first fire extinguishing agent is greater than the preset dosage by monitoring whether the pressure P in the agent tank is greater than the preset pressure value n. If it is monitored that the pressure P in the agent tank is not greater than the preset pressure value n, it means that the dosage of the first fire extinguishing agent is insufficient, and the fire host 121 sends a first request signal to the main control unit 110, so that the main control unit 110 controls the fire protection system 100 to enter the multi-cluster fire control mode. If it is monitored that the pressure P in the agent tank is greater than the preset pressure value n, it means that the dosage of the first fire extinguishing agent is sufficient, then the fire host 121 opens the first valve of the control valve K, and after determining the target battery box, the fire host 121 opens the solenoid valve in the puncture valve S corresponding to the target battery box, so that the fire host 121 delivers the first fire extinguishing agent to the target battery box, so that the target battery box uses the first fire extinguishing agent to handle the fault in the target battery box by point spraying, and sends the fire parameter information of the target battery box to the fire host 121.

[0113] Furthermore, when the fire host 121 determines that the temperature in the target battery box can last for a preset time of, for example, 60 seconds and is lower than a preset temperature threshold m°C according to the fire parameter information, the fire host 121 can determine that the fault is resolved and shut down the solenoid valve in the puncture valve S and the first valve of the control valve K to stop delivering the first fire extinguishing medium, that is, stop processing the fault. At the same time, when stopping processing the fault, the fire host 121 sends a fire extinguishing completion message to the master control unit 110, so that the fire protection system 100 enters a standby state.

[0114] When the fire host 121 determines based on the fire parameter information that the temperature in the target battery box cannot be maintained for a preset period of time and is lower than the preset temperature threshold m°C, the fire host 121 needs to continue to deliver the fire extinguishing medium to the target battery box. When the fire host 121 detects that the pressure P in the agent tank is not greater than the preset pressure value n, it sends a second request signal to the main control unit 110, so that the main control unit 110 controls the fire system 100 to enter the multi-cluster fire joint control mode.

[0115] Combine the following Figure 3-Figure 5 , the working process of the fire protection system 100 is described in detail. Figure 3-Figure 5 A schematic diagram of the working process of a fire protection system of a vehicle-mounted battery pack in a multi-cluster fire protection joint control mode provided in an embodiment of the present application.

[0116] In the case where the first battery cluster is battery cluster 120-1, the second battery cluster is battery cluster 120-2, and the third battery cluster is battery cluster 120-3, as shown in FIG. Figure 3 As shown, after receiving the first request signal or the second request signal, the main control unit 110 can determine that the first battery cluster is the target battery cluster, and the second battery cluster and the third battery cluster are other battery clusters, that is, the main control unit 110 can determine the sequence number of the target battery cluster. In this way, the main control unit 110 can start the fire host 2 in the second battery cluster and the fire host 3 in the third battery cluster, so that the fire host 2 and the fire host 3 monitor the corresponding fire extinguishing agent dosage by monitoring the pressure in their respective agent tanks and send it to the main control unit 110. The main control unit 110 determines the supplementary battery cluster in the second battery cluster and the third battery cluster according to the principle of the closest distance to the first battery cluster, that is, the proximity principle.

[0117] When it is monitored that the pressure P2 in the agent tank built into the fire host 2 is greater than n, that is, when it is determined that the second battery cluster is a supplementary battery cluster, the main control unit 110 opens the first valve 1 and the second valve 4 in the control valve K2 through the fire host 2, so that the supplementary valve of the fire controller 122-2 is opened, so that the fire extinguishing agent in the fire host 2 is transported to the target battery box in the first battery cluster, that is, the fire host 2 pulses the fire extinguishing agent outward.

[0118] When it is monitored that the pressure P2 in the agent tank built into the fire host 2 is not greater than n, the main control unit 110 continues to determine whether the pressure P3 in the agent tank installed in the fire host 3 is greater than n. If the pressure P3 in the agent tank installed in the fire host 3 is greater than n, that is, if it is determined that the third battery cluster is a supplementary battery cluster, the main control unit 110 opens the first valve 1 and the second valve 2 in the control valve K3 through the fire host 3, and controls the second valve 2 and the second valve 4 in the control valve K2 through the fire host 2 to remain in an open state, so that the fire extinguishing agent in the fire host 3 is transported to the target battery box in the first battery cluster, that is, the fire host 3 pulses out the fire extinguishing agent.

[0119] If the pressure P2 in the agent tank built into the fire host 2 and the pressure P3 in the agent tank set in the fire host 3 are both not greater than n, that is, if it is determined that the second battery cluster and the third battery cluster are supplementary battery clusters, the main control unit 110 opens the first valve 1 and the second valve 2 in the control valve 3 through the fire host 3, and controls the first valve 1, the second valve 2 and the second valve 4 in the control valve 2 to remain in an open state through the fire host 2, so that all the fire extinguishing agents in the fire host 2 and the fire host 3 are transported to the target battery box in the first battery cluster, that is, the fire host 2 and the fire host 3 simultaneously pulse-transmit the fire extinguishing agent outward.

[0120] The main control unit 110 obtains the fire status of the target battery box sent by the fire host 1 in real time. If a message requesting to stop fire extinguishing is received from the fire host 1, that is, if the fault is confirmed, the main control unit 110 sends a command for instructing to stop working to the fire host 2 and / or the fire host 3, so that the fire host 2 and / or the fire host 3 shut off the corresponding valves in the control valve K2 and / or the control valve K3, so that the fire protection system 100 enters the standby mode. If a message requesting to stop fire extinguishing is not received from the fire host 1, that is, if the fault is not confirmed, the main control unit 110 checks again after an interval of fs whether a message requesting to stop fire extinguishing is received.

[0121] Figure 4 The figure shows the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-2, the second battery cluster is the battery cluster 120-1, and the third battery cluster is the battery cluster 120-3. Since the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-2, the second battery cluster is the battery cluster 120-1, and the third battery cluster is the battery cluster 120-3 is similar to the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-1, the second battery cluster is the battery cluster 120-2, and the third battery cluster is the battery cluster 120-3, it will not be described in detail here.

[0122] Figure 5The figure shows the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-3, the second battery cluster is the battery cluster 120-1, and the third battery cluster is the battery cluster 120-2. Since the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-3, the second battery cluster is the battery cluster 120-1, and the third battery cluster is the battery cluster 120-3 is similar to the working process of the fire fighting system 100 in the multi-cluster fire fighting joint control mode when the first battery cluster is the battery cluster 120-1, the second battery cluster is the battery cluster 120-2, and the third battery cluster is the battery cluster 120-3, it will not be described in detail here.

[0123] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fire fighting system of a vehicle-mounted battery pack, characterized in that: The fire fighting system comprises: a master control unit and a plurality of battery clusters; The master control unit is connected to the plurality of battery clusters, each of the plurality of battery clusters is connected in parallel, and each of the battery clusters is connected via a fire protection pipeline; a target battery cluster, used to monitor whether the dosage of the first fire extinguishing agent in the target battery cluster is greater than a preset dosage, the target battery cluster being a battery cluster with a fault among the multiple battery clusters; if it is monitored that the dosage of the first fire extinguishing agent is greater than the preset dosage, the first fire extinguishing agent is used to process the fault until the fault is resolved; if it is monitored that the dosage of the first fire extinguishing agent is not greater than the preset dosage, a first request signal is sent to the main control unit; The main control unit is used to control the fire protection system to enter a multi-cluster fire protection joint control mode according to the first request signal until the fault is eliminated; the multi-cluster fire protection joint control mode means that the second fire extinguishing agent in the compensation battery cluster is supplemented to the target battery cluster, and the compensation battery cluster is other battery clusters among the multiple battery clusters except the target battery cluster.

2. The fire fighting system according to claim 1, characterized in that: The target battery cluster is further configured to send a second request signal to the main control unit when it is detected that the fault has not been resolved and the dosage of the first fire extinguishing agent is not greater than the preset dosage; The master control unit is further used to control the fire protection system to enter the multi-cluster fire protection joint control mode according to the second request signal until the fault is resolved.

3. The fire fighting system according to claim 2, characterized in that: When the fire protection system is in the multi-cluster fire protection joint control mode, the multiple battery clusters include a first battery cluster, a second battery cluster and a third battery cluster, wherein: The master control unit is further configured to determine, according to the first request signal or the second request signal, that the first battery cluster is the target battery cluster, the second battery cluster and the third battery cluster are the other battery clusters, and start the fire host in the second battery cluster and the third battery cluster; The second battery cluster is used to send a first signal to the main control unit after the fire host in the second battery cluster is started, and the first signal is used to represent the dosage of the fire extinguishing agent in the second battery cluster; The third battery cluster is used to send a second signal to the main control unit after the fire host in the third battery cluster is started, and the second signal is used to represent the dosage of the fire extinguishing agent in the third battery cluster; The master control unit is further used to determine a supplementary battery cluster from the second battery cluster and the third battery cluster according to the first signal and the second signal and in accordance with the principle of being closest to the first battery cluster, and the supplementary battery cluster is the second battery cluster and / or the third battery cluster.

4. The fire fighting system according to claim 3, characterized in that: The main control unit is specifically configured to determine the second battery cluster or the third battery cluster as the supplementary battery cluster when it is determined that the dosage of the fire extinguishing agent in the second battery cluster or the dosage of the fire extinguishing agent in the third battery cluster is greater than the preset dosage according to the first signal and the second signal; or, The main control unit is specifically used to determine the second battery cluster and the third battery cluster as the supplementary battery cluster when it is determined that the dosage of the fire extinguishing agent in the second battery cluster and the dosage of the fire extinguishing agent in the third battery cluster are not greater than the preset dosage based on the first signal and the second signal.

5. The fire fighting system according to claim 2, characterized in that: Any battery cluster includes: a fire host, a fire controller and a plurality of battery boxes, wherein the fire host stores a fire extinguishing agent; The fire host is connected to the master control unit, the fire controller and the multiple battery boxes respectively, the fire controller is also connected to the fire pipeline, and the multiple battery boxes are connected in series; When the fire protection system is in the multi-cluster fire protection joint control mode, and any one of the battery clusters is the target battery cluster, wherein: The fire host is used to control the output valve and the supplementary valve of the fire controller to open, and receive the second fire extinguishing agent after the output valve and the supplementary valve of the fire controller are opened; The fire host is further used to deliver the second fire extinguishing agent and the first fire extinguishing agent to the target battery box, and the target battery box is a battery box among the multiple battery boxes where the fault occurs; The target battery box is used to process the fault by using the second fire extinguishing agent and the first fire extinguishing agent, and send the fire parameter information of the target battery box to the fire host; The fire host is also used to control the output valve and the supplementary valve of the fire controller to close when it is detected that the fault is resolved based on the fire parameter information, so as to stop processing the fault.

6. The fire fighting system according to claim 5, characterized in that: When the fire protection system is in the multi-cluster fire protection joint control mode, and any one of the battery clusters is the other battery cluster, wherein: The fire host is used to start after receiving the feedback signal of the first request signal or the feedback signal of the second request signal sent by the main control unit, and send the stored dosage of the fire extinguishing agent to the main control unit, so that the main control unit determines whether to replenish the battery cluster; The fire host is further used to control the replenishment valve of the fire controller to open after the main control unit determines that the battery cluster is replenished, so that the fire extinguishing agent stored in the fire host is the second fire extinguishing agent; The fire host is also used to close the supplementary valve of the fire controller after the fault is eliminated.

7. The fire fighting system according to claim 5, characterized in that: In the case where any of the battery clusters is the target battery cluster and the dosage of the first fire extinguishing agent is greater than the preset dosage, wherein: The fire host is used to control the output valve of the fire controller to open and deliver the first fire extinguishing agent to the target battery box; The target battery box is used to process the fault using the first fire extinguishing agent and send fire parameter information of the target battery box to the fire host; The fire host is also used to control the output valve of the fire controller to close when it detects that the fault is resolved based on the fire parameter information, so as to stop processing the fault.

8. The fire fighting system according to any one of claims 5 to 7, characterized in that: The fire controller comprises: a control valve and a puncture valve; The first valve of the control valve is respectively connected to the fire-fighting main unit and the puncture valve, the second valve of the control valve is connected to the fire-fighting pipeline, and the puncture valve is also connected to the multiple battery boxes one by one through multiple built-in solenoid valves. The first valve of the control valve and any one of the multiple solenoid valves are the output valves of the fire-fighting controller, and the second valve of the control valve is the supplementary valve of the fire-fighting controller.

9. The fire fighting system according to claim 8, characterized in that: The number of the first valves of the control valve is 2, and the number of the second valves of the control valve is 1 or 2.

10. A rail vehicle, characterized in that: The rail vehicle comprises a vehicle body, an on-board battery pack arranged at the bottom of the vehicle body, and a fire fighting system of the on-board battery pack according to any one of claims 1 to 9; The vehicle-mounted battery pack is connected to the fire protection system of the vehicle-mounted battery pack.

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