Fire extinguishing control circuit and fire extinguishing system

Abstract

The invention relates to the technical field of fire extinguishing systems, and discloses a fire extinguishing control circuit and a fire extinguishing system.The output end of a smoke detection module is connected with a battery management system, and when it is detected that the current smoke concentration is larger than the preset smoke concentration, a smoke signal is output to the battery management system; the output end of the temperature sensing detection module is connected with the battery management system, and outputs a temperature signal to the battery management system when detecting that the current temperature is greater than a preset temperature; the smoke sensing detection module and the temperature sensing detection module are connected to a power supply branch, for supplying power to the fire extinguishing device, of the fire extinguishing power supply end of the battery management system; when the battery management system receives the smoke signal or the temperature signal, the fire extinguishing power supply end is controlled to supply power; when the smoke detection module detects that the current smoke concentration is greater than the preset smoke concentration, the power supply branch is switched on; and when the temperature sensing detection module detects that the current temperature is greater than the preset temperature, the power supply branch is switched on. The problem that fire fighting equipment in the prior art has the risk of false triggering is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing systems, and in particular to a fire extinguishing control circuit and a fire extinguishing system. Background Art

[0002] With the acceleration of energy transformation, energy storage technology has been widely used. As a key unit of the energy storage system, the energy storage cabinet can store a large amount of electrical energy, such as the lithium-ion battery energy storage cabinet. However, the batteries in the energy storage cabinet may experience thermal runaway during charging, discharging, overheating, short circuit, etc., which may cause fire.

[0003] Traditional fire-fighting equipment uses dry contact signal detectors to directly activate the fire extinguishing device, which poses a risk of false triggering. Summary of the invention

[0004] In view of this, the present invention provides a fire extinguishing control circuit and a fire extinguishing system to solve the problem of the risk of false triggering of fire fighting equipment in the prior art.

[0005] In a first aspect, the present invention provides a fire extinguishing control circuit, wherein the fire extinguishing control circuit is connected between a battery management system and a fire extinguishing device, and the fire extinguishing control circuit comprises:

[0006] A smoke detection module, the output end of which is connected to the battery management system, and is used to output a smoke signal to the battery management system when it is detected that the current smoke concentration is greater than a preset smoke concentration;

[0007] A temperature sensing detection module, the output end of which is connected to the battery management system, and is used to output a temperature signal to the battery management system when it is detected that the current temperature is greater than a preset temperature;

[0008] The smoke detection module and the temperature detection module are connected to a power supply branch that supplies power to the fire extinguishing device at the fire extinguishing power supply end of the battery management system;

[0009] The battery management system is used to control the fire extinguishing power supply end to supply power when receiving the smoke signal or the temperature signal;

[0010] The smoke detection module is also used to turn on the power supply branch when it is detected that the current smoke concentration is greater than the preset smoke concentration;

[0011] The temperature sensing detection module is also used to turn on the power supply branch when it is detected that the current temperature is greater than a preset temperature.

[0012] The fire extinguishing control circuit provided by the present invention has a smoke detection module that outputs a smoke signal to the battery management system when it detects that the surrounding smoke concentration is greater than a preset smoke concentration, and a temperature detection module that outputs a smoke signal to the battery management system when it detects that the surrounding temperature is greater than a preset temperature. In addition, the smoke detection module and the temperature detection module are connected to the fire extinguishing power supply end of the battery management system to supply power to the fire extinguishing device. Only when the smoke detection module detects that the current smoke concentration is greater than the preset smoke concentration, and the temperature detection module is started to detect that the current temperature is greater than the preset temperature, can the fire extinguishing power supply end of the battery management system supply power to the fire extinguishing device to perform fire extinguishing measures. In addition, the linkage control of the battery management system is realized, avoiding the risk of false triggering caused by electromagnetic interference and other problems. At the same time, there is no need to use a host, which greatly reduces the cost and is compatible with the space requirements in the cabinet. In addition, the stability and reliability of fire extinguishing are greatly improved.

[0013] In an optional implementation, the fire extinguishing power supply terminal includes: a fire extinguishing positive power supply terminal and a fire extinguishing negative power supply terminal;

[0014] The fire extinguishing negative power supply terminal is connected to the fire extinguishing device, and the smoke detection module and the temperature detection module are connected to the power supply branch of the fire extinguishing positive power supply terminal that supplies power to the fire extinguishing device; or,

[0015] The positive power supply end of the fire extinguishing electrode is connected to the fire extinguishing device, and the smoke detection module and the temperature detection module are connected to the power supply branch of the negative power supply end of the fire extinguishing electrode that supplies power to the fire extinguishing device.

[0016] In an optional implementation, the smoke detection module includes:

[0017] A smoke detector, wherein an output end of the smoke detector is connected to the battery management system;

[0018] A first switch unit, wherein the first switch unit is connected to the power supply branch, a control end of the first switch unit is connected to the smoke detector, and the first switch unit is used to receive a first control signal and turn on the power supply branch, wherein the first control signal is sent by the smoke detector when it detects that the current smoke concentration is greater than a preset smoke concentration.

[0019] In an optional implementation, the first switch unit is a first normally open dry contact of the smoke detector, and when the smoke detector detects that the current smoke concentration is greater than a preset smoke concentration, the first normally open dry contact is closed.

[0020] In an optional implementation, the temperature sensing detection module includes:

[0021] A temperature sensor, the output end of which is connected to the battery management system;

[0022] A second switch unit, the second switch unit is connected to the power supply branch, the control end of the second switch unit is connected to the temperature sensor, the second switch unit is used to receive a second control signal and turn on the power supply branch, the second control signal is sent by the temperature sensor when it detects that the current temperature is greater than a preset temperature.

[0023] In an optional implementation, the second switch unit is a second normally open dry contact of the temperature detector, and when it is detected that the current temperature is greater than a preset temperature, the second normally open dry contact is closed.

[0024] In an optional embodiment, the smoke detector includes: a first normally closed dry contact, the first normally closed dry contact is connected to the first input terminal of the battery management system, and the first normally closed dry contact is used to disconnect when it is detected that the current smoke concentration is greater than the preset smoke concentration, so as to output a smoke signal to the battery management system.

[0025] In an optional embodiment, the temperature detector includes: a second normally closed dry contact, the second normally closed dry contact is connected to the second input terminal of the battery management system, and the second normally closed dry contact is used to disconnect when it is detected that the current temperature is greater than a preset temperature, so as to output a temperature signal to the battery management system.

[0026] In an optional implementation, the fire extinguishing control circuit includes:

[0027] An alarm device is connected to the fire extinguishing power supply end and the fire extinguishing device respectively, and is used to receive a power supply signal from the fire extinguishing power supply end and output an alarm signal.

[0028] In a second aspect, the present invention provides a fire extinguishing system, the fire extinguishing system comprising the fire extinguishing control circuit as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a structural diagram of a fire extinguishing control circuit according to an embodiment of the present invention;

[0031] Figure 2is another structural diagram of a fire extinguishing control circuit according to an embodiment of the present invention;

[0032] Figure 3 is another structural diagram of a fire extinguishing control circuit according to an embodiment of the present invention;

[0033] Figure 4 is a detailed structural diagram of a fire extinguishing control circuit according to an embodiment of the present invention;

[0034] Figure 5 is a structural diagram of yet another fire extinguishing control circuit according to an embodiment of the present invention.

[0035] Description of Figure Numbers:

[0036] 10-smoke detection module; 20-temperature detection module; 30-alarm device; S1-smoke detector; S2-temperature detector; 11-first normally open dry contact; 12-first normally closed dry contact; 21-second normally open dry contact; 22-second normally closed dry contact. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] With the acceleration of energy transformation, energy storage technology has been widely used. As a key unit of the energy storage system, the energy storage cabinet can store a large amount of electrical energy, such as the lithium-ion battery energy storage cabinet. However, the batteries in the energy storage cabinet may experience thermal runaway during charging, discharging, overheating, short circuit, etc., which may cause fire.

[0042] Traditional fire-fighting equipment uses dry contact signal detectors to directly activate the fire extinguishing device, which poses a risk of false triggering.

[0043] In this regard, a fire extinguishing control circuit is provided in this embodiment, such as Figure 1 As shown, the fire extinguishing control circuit is connected between the battery management system and the fire extinguishing device, and the fire extinguishing control circuit includes:

[0044] A smoke detection module 10, the output end of which is connected to the battery management system, and is used to output a smoke signal to the battery management system when it is detected that the current smoke concentration is greater than a preset smoke concentration;

[0045] A temperature sensing detection module 20, the output end of which is connected to the battery management system, and is used to output a temperature signal to the battery management system when it is detected that the current temperature is greater than a preset temperature;

[0046] The smoke detection module 10 and the temperature detection module 20 are connected to a power supply branch that supplies power to the fire extinguishing device at the fire extinguishing power supply end of the battery management system;

[0047] The battery management system is used to control the fire extinguishing power supply end to supply power when receiving the smoke signal or the temperature signal;

[0048] The smoke detection module 10 is also used to turn on the power supply branch when it is detected that the current smoke concentration is greater than the preset smoke concentration;

[0049] The temperature sensing detection module 20 is also used to turn on the power supply branch when it is detected that the current temperature is greater than a preset temperature.

[0050] Specifically, the fire extinguishing control circuit can be applied to energy storage commercial cabinets of about 3 cubic meters. When the smoke detection module 10 detects that the surrounding smoke concentration is greater than the preset smoke concentration, it outputs a smoke signal to the action signal receiving end of the battery management system, and when the temperature detection module 20 detects that the surrounding temperature is greater than the preset temperature, it outputs a smoke signal to the action signal receiving end of the battery management system. When the battery management system receives the smoke signal or the temperature signal, it controls the fire extinguishing power supply end to supply power to the fire extinguishing device. Optionally, the sensitivity of the smoke detection module 10 and the temperature detection module 20 can be set according to the requirements of the application scenario. The smoke detection module 10 can be composed of a smoke sensor and a switch device, and the temperature detection module 20 can be composed of a temperature sensor and a switch device. The fire extinguishing device can be a gas extinguishing device, which is not limited here.

[0051] It should be noted that the battery management system is also used to control the power supply of the fire extinguishing power supply terminal when the smoke signal and temperature signal are received, and is not limited to controlling the power supply of the fire extinguishing power supply terminal when the smoke signal or temperature signal is received. The power supply branch for the fire extinguishing power supply terminal to supply power to the fire extinguishing device includes a starting branch of the fire extinguishing device, which is not limited to power supply startup. The starting branch is used for the fire extinguishing power supply terminal to perform fire extinguishing measures. Specifically, it can be a control branch for controlling the fire extinguishing device to perform fire extinguishing measures.

[0052] Specifically, the smoke detection module 10 and the temperature detection module 20 are connected in series on the power supply branch of the fire extinguishing power supply end to supply power to the fire extinguishing device, that is, when the smoke detection module 10 detects that the current smoke concentration is greater than the preset smoke concentration, the fire extinguishing power supply end is turned on to supply power to the fire extinguishing device, and when the temperature detection module 20 detects that the current temperature is greater than the preset temperature, the fire extinguishing power supply end is turned on to supply power to the fire extinguishing device. Figure 1 , the voltage of the fire extinguishing power supply terminal can be transmitted to the fire extinguishing device only when the smoke detection module 10 and the temperature detection module 20 are simultaneously conducting the power supply branch. Thus, spraying caused by wiring errors during the wiring process or mis-spraying caused by electromagnetic interference can be avoided.

[0053] It should be noted that the connection positions of the smoke detection module 10 and the temperature detection module 20 in the power supply branch are not limited. Figure 1 In the power supply path, the fire extinguishing power supply end is connected to the smoke detection module 10, the smoke detection module 10 is connected to the temperature detection module 20, and the temperature detection module 20 is connected to the fire extinguishing device. Alternatively, in the power supply path, the fire extinguishing power supply end is connected to the temperature detection module 20, the temperature detection module 20 is connected to the smoke detection module 10, and the smoke detection module 10 is connected to the fire extinguishing device (not shown in the figure).

[0054] In the fire extinguishing control circuit provided by the present invention, when the smoke detection module 10 detects that the surrounding smoke concentration is greater than the preset smoke concentration, the smoke detection module 10 outputs a smoke signal to the battery management system, and when the temperature detection module 20 detects that the surrounding temperature is greater than the preset temperature, the smoke detection module 10 and the temperature detection module 20 are connected to the fire extinguishing power supply end of the battery management system to supply power to the fire extinguishing device. Only when the smoke detection module 10 detects that the current smoke concentration is greater than the preset smoke concentration, and the temperature detection module 20 is started to detect that the current temperature is greater than the preset temperature, the fire extinguishing power supply end of the battery management system can supply power to the fire extinguishing device to perform fire extinguishing measures. In addition, the linkage control of the battery management system based on the smoke detection module 10 and the temperature detection module 20 is realized, avoiding the risk of false triggering caused by electromagnetic interference and other problems. At the same time, there is no need to use a host, which greatly reduces the cost and is compatible with the space requirements in the cabinet. In addition, the stability and reliability of fire extinguishing are greatly improved. In addition, not taking the software of the battery management system as the only condition for controlling the fire extinguishing device can avoid the problem of false triggering of the battery management system. Due to its simple structure, it can be used in fire extinguishing scenarios in small spaces.

[0055] In some optional embodiments, Figure 2 As shown, the fire extinguishing power supply terminal includes: a fire extinguishing positive power supply terminal V- and a fire extinguishing negative power supply terminal V-;

[0056] The fire extinguishing negative power supply terminal V- is connected to the fire extinguishing device, and the smoke detection module 10 and the temperature detection module 20 are connected to the power supply branch of the fire extinguishing positive power supply terminal V+ that supplies power to the fire extinguishing device; or,

[0057] Specifically, the fire extinguishing device can only be powered when the negative electricity of the fire extinguishing negative power supply terminal V- and the positive electricity of the fire extinguishing positive power supply terminal V+ are respectively transmitted to the fire extinguishing device. Figure 2 In (A), the smoke detection module 10 and the temperature detection module 20 are connected in series to the power supply branch of the fire extinguishing positive power supply terminal V+ for supplying power to the fire extinguishing device.

[0058] It should be noted that the reference Figure 2 In (A), the fire extinguishing negative power supply terminal - can continuously output negative electricity to the fire extinguishing device, while the fire extinguishing positive power supply terminal V+ can output positive electricity to the fire extinguishing device only when receiving a smoke signal or a temperature signal. Therefore, when a fire occurs and there is smoke and high temperature in the surrounding environment, the fire extinguishing positive power supply terminal V+ and the fire extinguishing negative power supply terminal - are simultaneously transmitted to the fire extinguishing device, so that the fire extinguishing device works to take fire extinguishing measures.

[0059] The fire extinguishing positive power supply terminal V+ is connected to the fire extinguishing device, and the smoke detection module 10 and the temperature detection module 20 are connected to the power supply branch of the fire extinguishing negative power supply terminal V- which supplies power to the fire extinguishing device.

[0060] Specifically, refer to Figure 2 In (B), the smoke detection module 10 and the temperature detection module 20 are connected in series to the power supply branch of the fire extinguishing negative power supply terminal V- which supplies power to the fire extinguishing device.

[0061] It should be noted that the reference Figure 2 In (B), the positive power supply terminal V+ of the fire extinguishing device can continuously output positive electricity to the fire extinguishing device, while the negative power supply terminal V- of the fire extinguishing device can output negative electricity to the fire extinguishing device only when receiving a smoke signal or a temperature signal. Thus, when a fire occurs and there is smoke and high temperature in the surrounding environment, the positive power supply terminal V+ of the fire extinguishing device and the negative power supply terminal - of the fire extinguishing device are simultaneously transmitted to the fire extinguishing device, so that the fire extinguishing device works to take fire extinguishing measures.

[0062] In addition, the positive power supply terminal V+ of the fire extinguishing device can be +24V, and the negative power supply terminal V- of the fire extinguishing device can be -24V.

[0063] In some optional embodiments, Figure 3 As shown, the smoke detection module 10 includes:

[0064] A smoke detector S1, wherein the output end of the smoke detector S1 is connected to the battery management system;

[0065] The first switch unit 11 is connected to the power supply branch, the control end of the first switch unit 11 is connected to the smoke detector S1, and the first switch unit 11 is used to receive a first control signal and turn on the power supply branch, wherein the first control signal is sent by the smoke detector when it detects that the current smoke concentration is greater than a preset smoke concentration.

[0066] Specifically, refer to Figure 3 When the smoke detector S1 detects that the current smoke concentration is greater than the preset smoke concentration, it outputs a smoke signal to the battery management system and outputs a first control signal to the first switch unit 11. When the first switch unit 11 receives the first control signal, it conducts the voltage of the fire extinguishing power supply terminal to the temperature detector S2. Optionally, the first switch unit 11 can be a switch device, including a relay.

[0067] In some optional embodiments, Figure 4 As shown, the first switch unit 11 is the first normally open dry contact of the smoke detector S1. When the smoke detector S1 detects that the current smoke concentration is greater than the preset smoke concentration, the first normally open dry contact is closed.

[0068] Specifically, refer to Figure 4 The first switch unit can be the first normally open dry contact inside the smoke detector S1, that is, NO1 and C1 are the first normally open dry contacts. The smoke detector S1 includes the first normally open dry contact, which is generally in a disconnected state, and is turned on when the smoke detector S1 detects that the current smoke concentration is greater than the preset smoke concentration. By selecting the smoke detector S1 with the first normally open dry contact, NO1 is connected to the fire extinguishing power supply terminal, C1 is connected to the temperature detector S2, and then, when the smoke detector S1 detects that the current smoke concentration is greater than the preset smoke concentration, NO1 and C1 are turned on.

[0069] In the present invention, by directly connecting the fire extinguishing power supply terminal and the fire extinguishing device through the first normally open dry contact, there is no need to add a host, thereby greatly saving costs and greatly simplifying the connection structure.

[0070] It should be noted that the battery management system also includes a detector power supply end, which supplies power to the smoke detector S1 through the L1 terminal and the N1 terminal of the smoke detector S1.

[0071] In some optional embodiments, Figure 3 As shown, the temperature sensing detection module 20 includes:

[0072] A temperature sensor S2, wherein the output end of the temperature sensor S2 is connected to the battery management system;

[0073] The second switch unit 21 is connected to the power supply branch, the control end of the second switch unit 21 is connected to the temperature sensor S2, and the second switch unit 21 is used to receive a second control signal and turn on the power supply branch. The second control signal is sent by the temperature sensor S2 when it detects that the current temperature is greater than a preset temperature.

[0074] Specifically, refer to Figure 3 When the temperature detector S2 detects that the current temperature is greater than the preset temperature, it outputs a smoke signal to the battery management system and outputs a second control signal to the second switch unit 21. When the second switch unit 21 receives the second control signal, it conducts the voltage of the smoke detection module 10 to the fire extinguishing device. Optionally, the second switch unit 21 can be a switch device, including a relay.

[0075] In some optional embodiments, Figure 4 As shown, the second switch unit 21 is a second normally open dry contact of the temperature detector S2. When it is detected that the current temperature is greater than the preset temperature, the second normally open dry contact is closed.

[0076] Specifically, refer to Figure 4 , the second switch unit 21 can be the second normally open dry contact inside the temperature detector S2, that is, NO2 and C2 are the second normally open dry contacts, the temperature detector S2 includes the second normally open dry contact, the second normally open dry contact is generally in a disconnected state, and is turned on when the temperature detector S2 detects that the current temperature is greater than the preset temperature. By selecting the temperature detector S2 with a second normally open dry contact, NO2 is connected to the smoke detection module 10, C2 is connected to the fire extinguishing device, and then, the temperature detector S2 turns on NO2 and C2 when it detects that the current temperature is greater than the preset temperature.

[0077] It should be noted that the battery management system also includes a detector power supply end, which supplies power to the smoke detector S1 through the L1 terminal and N1 terminal of the smoke detector S1, respectively, and supplies power to the L2 terminal of the temperature detector S2 through the L1_OUT terminal, and supplies power to the N2 terminal of the temperature detector S2 through the N1_OUT terminal. Of course, the detector power supply end can supply power to the smoke detector S1 and the temperature detector S2 separately.

[0078] In the present invention, by directly connecting the second normally open dry contact between the fire extinguishing power supply terminal and the fire extinguishing device, there is no need to add an additional host, thereby greatly saving costs and greatly simplifying the connection structure. It should be noted that by connecting the first normally open dry contact and the second normally open dry contact in series on the power supply branch that supplies power to the fire extinguishing device at the fire extinguishing power supply terminal, there is no need to use a control device, thereby realizing linkage control, thereby greatly saving costs and greatly simplifying the connection structure.

[0079] In some optional embodiments, Figure 4 As shown, the smoke detector S1 includes: a first normally closed dry contact 12, which is connected to the first input end of the battery management system, and the first normally closed dry contact 12 is used to disconnect when it is detected that the current smoke concentration is greater than the preset smoke concentration, so as to output a smoke signal to the battery management system.

[0080] Specifically, the smoke detector S1 includes a first normally closed dry contact 12, namely C1 and NC1. When the smoke detector S1 does not detect smoke, C1 and NC1 are in a conducting state, thereby outputting a no-smoke signal to the battery management system. When the smoke detector S1 detects that the current smoke concentration is greater than the preset smoke concentration, it is disconnected, thereby outputting a smoke signal to the battery management system. It is worth noting that by outputting a no-smoke signal when C1 and NC1 are in a conducting state, the battery management system can detect that the power supply of the smoke detector S1 is normal.

[0081] In some optional embodiments, Figure 4 As shown, the temperature detector S2 includes: a second normally closed dry contact 22, which is connected to the second input end of the battery management system, and the second normally closed dry contact 22 is used to disconnect when it is detected that the current temperature is greater than the preset temperature, so as to output a temperature signal to the battery management system.

[0082] refer to Figure 4 By connecting the first normally closed dry contact 12 and the second normally closed dry contact 22 in series, that is, NC1 is connected to C2, and NC2 is connected to the action signal receiving terminal, the battery management system can also be powered through the fire extinguishing power supply terminal as long as it receives the smoke temperature signal (i.e., smoke signal or temperature signal). Compared with the method of receiving temperature signals or smoke signals separately, the receiving terminals of the action signals in the battery management system are reduced.

[0083] Specifically, the interior of the temperature detector S2 includes a second normally closed dry contact 22, namely C2 and NC2. When the second normally closed dry contact 22 does not detect smoke, C2 and NC2 are in a conducting state, thereby outputting a no-temperature signal to the battery management system. When the temperature detector S2 detects that the current temperature is greater than the preset temperature, it is disconnected, thereby outputting a temperature signal to the battery management system. It is worth noting that by outputting a no-temperature signal when C2 and NC2 are in a conducting state, the battery management system can detect that the power supply of the temperature detector S2 is normal.

[0084] refer to Figure 4 After receiving the voltage from the fire extinguishing power supply end and taking fire extinguishing measures, the fire extinguishing device feeds back a fire extinguishing signal to the fire extinguishing signal receiving end in the battery management system. Specifically, the fire extinguishing signal receiving end in the battery management system is connected to the feedback dry contact of the fire extinguishing device.

[0085] In some optional embodiments, Figure 5 As shown, the fire extinguishing control circuit includes:

[0086] an alarm device 30, the alarm device 30 being connected to the fire extinguishing power supply end and the fire extinguishing device respectively, and being used for receiving a power supply signal from the fire extinguishing power supply end and outputting an alarm signal;

[0087] Specifically, by connecting the alarm device 30 to the power supply branch that supplies power to the fire extinguishing device at the fire extinguishing power supply end, there is no need to set up a host, which greatly saves costs and simplifies the structure. That is, only when the smoke detection module 10 detects that the current smoke concentration is greater than the preset smoke concentration, and the temperature detection module 20 is started when it detects that the current temperature is greater than the preset temperature, an alarm signal is output. Optionally, the alarm device 30 includes: an alarm light or a buzzer, the alarm light emits light when receiving the power supply signal to output the alarm signal, or the buzzer sounds when receiving the power supply signal to output the alarm signal. It should be noted that by connecting the alarm device 30 in parallel with the fire extinguishing device, an alarm signal is output when the fire extinguishing device takes fire extinguishing measures, and thus, there is no need to use another control device, which greatly reduces the cost of fire extinguishing and simplifies the control structure of fire extinguishing.

[0088] In this embodiment, the present invention provides a fire extinguishing system, which includes the above-mentioned fire extinguishing control circuit, battery management system and fire extinguishing device. When the smoke detection module 10 detects that the surrounding smoke concentration is greater than the preset smoke concentration, it outputs a smoke signal to the battery management system, and when the temperature detection module 20 detects that the surrounding temperature is greater than the preset temperature, it outputs a smoke signal to the battery management system, and the smoke detection module 10 and the temperature detection module 20 are connected to the fire extinguishing power supply end of the battery management system to supply power to the fire extinguishing device. Only when the smoke detection module 10 detects that the current smoke concentration is greater than the preset smoke concentration, and the temperature detection module 20 is started and detects that the current temperature is greater than the preset temperature, the fire extinguishing power supply end of the battery management system can supply power to the fire extinguishing device to perform fire extinguishing measures. In addition, the linkage control of the battery management system is realized, avoiding the risk of false triggering caused by electromagnetic interference and other problems. At the same time, there is no need to use a host, which greatly reduces the cost and is compatible with the space requirements in the cabinet. In addition, the stability and reliability of fire extinguishing are greatly improved.

[0089] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A fire extinguishing control circuit, characterized in that: The fire extinguishing control circuit is connected between the battery management system and the fire extinguishing device, and the fire extinguishing control circuit includes: A smoke detection module, the output end of which is connected to the battery management system, and is used to output a smoke signal to the battery management system when it is detected that the current smoke concentration is greater than a preset smoke concentration; A temperature sensing detection module, the output end of which is connected to the battery management system, and is used to output a temperature signal to the battery management system when it is detected that the current temperature is greater than a preset temperature; The smoke detection module and the temperature detection module are connected to a power supply branch that supplies power to the fire extinguishing device at the fire extinguishing power supply end of the battery management system; The battery management system is used to control the fire extinguishing power supply end to supply power when receiving the smoke signal or the temperature signal; The smoke detection module is also used to turn on the power supply branch when it is detected that the current smoke concentration is greater than the preset smoke concentration; The temperature sensing detection module is also used to turn on the power supply branch when it is detected that the current temperature is greater than a preset temperature.

2. The fire extinguishing control circuit according to claim 1, characterized in that: The fire extinguishing power supply terminal includes: a fire extinguishing positive power supply terminal and a fire extinguishing negative power supply terminal; The fire extinguishing negative power supply terminal is connected to the fire extinguishing device, and the smoke detection module and the temperature detection module are connected to the power supply branch of the fire extinguishing positive power supply terminal that supplies power to the fire extinguishing device; or, The fire extinguishing positive power supply end is connected to the fire extinguishing device, and the smoke detection module and the temperature detection module are connected to the power supply branch of the fire extinguishing negative power supply end that supplies power to the fire extinguishing device.

3. The fire extinguishing control circuit according to claim 1, characterized in that: The smoke detection module comprises: A smoke detector, wherein an output end of the smoke detector is connected to the battery management system; A first switch unit, wherein the first switch unit is connected to the power supply branch, a control end of the first switch unit is connected to the smoke detector, and the first switch unit is used to receive a first control signal and turn on the power supply branch, wherein the first control signal is sent by the smoke detector when it detects that the current smoke concentration is greater than a preset smoke concentration.

4. The fire extinguishing control circuit according to claim 3, characterized in that: The first switch unit is a first normally open dry contact of the smoke detector. When the smoke detector detects that the current smoke concentration is greater than a preset smoke concentration, the first normally open dry contact is closed.

5. The fire extinguishing control circuit according to claim 1, characterized in that: The temperature sensing detection module comprises: A temperature sensor, the output end of which is connected to the battery management system; A second switch unit, the second switch unit is connected to the power supply branch, the control end of the second switch unit is connected to the temperature sensor, the second switch unit is used to receive a second control signal and turn on the power supply branch, the second control signal is sent by the temperature sensor when it detects that the current temperature is greater than a preset temperature.

6. The fire extinguishing control circuit according to claim 5, characterized in that: The second switch unit is a second normally open dry contact of the temperature detector. When it is detected that the current temperature is greater than the preset temperature, the second normally open dry contact is closed.

7. The fire extinguishing control circuit according to claim 3, characterized in that: The smoke detector includes: a first normally closed dry contact, which is connected to a first input terminal of the battery management system, and is used to disconnect when it is detected that the current smoke concentration is greater than a preset smoke concentration, so as to output a smoke signal to the battery management system.

8. The fire extinguishing control circuit according to claim 5, characterized in that: The temperature detector includes: a second normally closed dry contact, which is connected to the second input terminal of the battery management system. The second normally closed dry contact is used to disconnect when it is detected that the current temperature is greater than a preset temperature, so as to output a temperature signal to the battery management system.

9. The fire extinguishing control circuit according to claim 1, characterized in that: The fire extinguishing control circuit comprises: An alarm device is connected to the fire extinguishing power supply end and the fire extinguishing device respectively, and is used to receive a power supply signal from the fire extinguishing power supply end and output an alarm signal.

10. A fire extinguishing system, characterized in that: The fire extinguishing system comprises the fire extinguishing control circuit according to any one of claims 1 to 9.

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