Fire extinguishing system of energy storage device and energy storage system thereof

Abstract

The utility model provides a fire extinguishing system of an energy storage device and an energy storage system thereof. The fire extinguishing system comprises a switch unit, a switch control unit, a switch detection unit, a circuit detection unit and fire extinguishing execution equipment, the input end of the switch unit is electrically connected with a power supply, the switch control unit is electrically connected with the control end of the switch unit, and the output end of the switch unit is electrically connected with fire extinguishing execution equipment through the switch detection unit and the circuit detection unit; the switch control unit is used for responding to the first control signal and controlling the switch unit to be closed so as to transmit electric energy transmitted by the power supply to the fire extinguishing execution equipment through the switch detection unit and the circuit detection unit; the switch detection unit is used for detecting the state of the switch unit when the switch unit is in a closed state; and the circuit detection unit is used for detecting the state of a circuit between the switch unit and the fire extinguishing execution equipment when the switch unit is in a closed state.

Description

Technical Field

[0001] The present application relates to the field of battery safety technology, and in particular to a fire extinguishing system of an energy storage device and an energy storage system thereof. Background Art

[0002] Since the battery may have the risk of temperature rise or fire when running for a long time, fire extinguishing execution equipment or cooling equipment is needed to automatically cool down or extinguish the battery to reduce losses. The automatic execution of the fire extinguishing execution equipment or cooling equipment requires the configuration of the corresponding fire extinguishing system. It can be seen that the reliability of the fire extinguishing system is crucial.

[0003] At present, fire extinguishing systems equipped with fire extinguishing execution equipment or cooling equipment generally use MCU running programs to perform circuit reliability detection and control, which makes the designed fire extinguishing system structure complex and costly. Utility Model Content

[0004] In view of the above problems, the present application provides a fire extinguishing system of an energy storage device and its energy storage system, which can solve the problems of complex structure and high cost in the current fire extinguishing system that uses MCU running program to perform circuit reliability detection and control.

[0005] In a first aspect, the present application provides a fire extinguishing system for an energy storage device, comprising: a switch unit, a switch control unit, a switch detection unit, a circuit detection unit and a fire extinguishing execution device; the input end of the switch unit is used to be electrically connected to a power supply, the switch control unit is electrically connected to a control end of the switch unit, and the output end of the switch unit is electrically connected to the fire extinguishing execution device through the switch detection unit and the circuit detection unit; the switch control unit is used to control the switch unit to close in response to a first control signal, so as to transmit the electric energy transmitted by the power supply to the fire extinguishing execution device through the switch detection unit and the circuit detection unit; the switch detection unit is used to perform a state detection on the switch unit when the switch unit is in a closed state; the circuit detection unit is used to perform a state detection on the circuit between the switch unit and the fire extinguishing execution device when the switch unit is in a closed state.

[0006] The driving circuit designed above, this scheme detects the state of the switch unit of the fire extinguishing system and the circuit state between the switch unit and the fire extinguishing execution device by setting up the hardware circuit of the switch detection unit and the circuit detection unit, thereby reducing the structural complexity and cost of the fire extinguishing system, and further achieving the effect of simplifying the circuit and low cost.

[0007] In some embodiments, the switch control unit includes a controllable switch tube, a first resistor, a second resistor and a capacitor; the first end of the first resistor is used to receive a first control signal, and the second end of the first resistor is electrically connected to the first end of the capacitor, the first end of the second resistor and the base of the controllable switch tube respectively; the second end of the capacitor, the second end of the second resistor and the emitter of the controllable switch tube are grounded, and the collector of the controllable switch tube is electrically connected to the control end of the switch unit.

[0008] In the above implementation mode, this scheme realizes the switch control of the fire extinguishing system through a simple controllable switch tube, thereby ensuring that the circuit can respond quickly through the rapid switching of the controllable switch tube, thereby improving the efficiency of the switch control of the fire extinguishing system on the basis of a simple switch control circuit structure.

[0009] In some embodiments, the power supply includes a positive power supply electrode and a negative power supply electrode, and the switching unit includes a double-pole double-throw relay; the double-pole double-throw relay includes a positive contact, a negative contact and a relay coil; the relay coil is electrically connected to the collector of the controllable switching tube; the positive power supply electrode is electrically connected to the positive contact, and the negative power supply electrode is electrically connected to the negative contact.

[0010] In some embodiments, the switch detection unit includes a positive contact detection unit; the positive contact detection unit is electrically connected to the positive contact of the double-pole double-throw relay, and the positive contact detection unit is used to detect and display the status of the positive contact when the switch unit is in a closed state.

[0011] In some embodiments, the positive contact detection unit includes a third resistor and a first light-emitting diode; the first end of the third resistor is electrically connected to the positive contact, the second end of the third resistor is electrically connected to the positive electrode of the first light-emitting diode, and the negative electrode of the first light-emitting diode is grounded.

[0012] In the above implementation mode, this scheme forms a positive contact detection unit through a first light-emitting diode and a resistor, so that the positive contact detection unit not only realizes the state detection of the positive contact on the basis of a simple circuit structure, but also realizes the state display through the light-emitting diode, thereby improving the efficiency of the positive contact state feedback.

[0013] In some embodiments, the switch detection unit also includes a negative contact detection unit; the negative contact detection unit is electrically connected to the negative contact of the double-pole double-throw relay, and the negative contact detection unit is used to detect and display the status of the negative contact when the switch unit is in a closed state.

[0014] In some embodiments, the negative contact detection unit includes a fourth resistor and a second light emitting diode; the cathode of the second light emitting diode is electrically connected to the negative contact, and the anode of the second light emitting diode is electrically connected to the reference voltage through the fourth resistor.

[0015] In some embodiments, the circuit detection unit includes a short circuit detection unit and an open circuit detection unit; the positive contact of the double-pole double-throw relay is electrically connected to the first end of the short circuit detection unit and the first end of the open circuit detection unit, respectively; the second end of the open circuit detection unit is connected to the fire extinguishing execution device and then electrically connected to the second end of the short circuit detection unit; the second end of the short circuit detection unit is electrically connected to the negative contact.

[0016] In some embodiments, the short circuit detection unit includes a fifth resistor and a third light-emitting diode; the open circuit detection unit includes a first diode, a second diode, a sixth resistor and a fourth light-emitting diode; the first end of the fifth resistor, the positive electrode of the first diode and the first end of the sixth resistor are all electrically connected to the positive contact, and the second end of the fifth resistor is electrically connected to the negative contact through the third light-emitting diode; the negative electrode of the first diode is electrically connected to the positive electrode of the second diode, the second end of the sixth resistor is electrically connected to the negative electrode of the second diode through the fourth light-emitting diode, and the negative electrode of the second diode is electrically connected to the negative contact through the fire extinguishing execution device.

[0017] In the above implementation mode, the switch detection unit and the circuit detection unit designed in this scheme can display the switch status and the circuit status between the switch unit and the fire extinguishing execution device, so that the staff can know the fault status and the cause of the fault according to the displayed status, thereby improving the timeliness and convenience of the drive circuit maintenance.

[0018] In a second aspect, the present application provides an energy storage system, which includes a fire extinguishing system for an energy storage device described in any optional embodiment of the first aspect and an energy storage device, and the fire extinguishing execution equipment is used to extinguish a fire in the energy storage device.

[0019] The fire extinguishing system designed as above includes the fire extinguishing system of the energy storage device described above. Therefore, the designed fire extinguishing system can detect the state of the switch unit of the fire extinguishing system and the circuit state between the switch unit and the fire extinguishing execution device by setting the hardware circuit of the switch detection unit and the circuit detection unit, thereby reducing the structural complexity and cost of the fire extinguishing system, and further achieving the effect of simplifying the circuit and reducing the cost.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means 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 present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0022] Figure 1 A first structural schematic diagram of a fire extinguishing system provided in an embodiment of the present application;

[0023] Figure 2 A second structural schematic diagram of the fire extinguishing system provided in an embodiment of the present application;

[0024] Figure 3 A specific circuit diagram of a fire extinguishing system provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of the energy storage system provided in an embodiment of the present application.

[0026] Icons: 1-fire extinguishing system; 2-energy storage device; A-power supply; B-fire extinguishing execution equipment; 10-switch unit; 110-positive contact; 120-negative contact; 130-relay coil; 20-switch control unit; 30-switch detection unit; 310-positive contact detection unit; 320-negative contact detection unit; 40-circuit detection unit; 410-short circuit detection unit; 420-open circuit detection unit; Q1-controllable switch tube; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; R5-fifth resistor; R6-sixth resistor; C-capacitor; D1-first diode; D2-second diode; L1-first light-emitting diode; L2-second light-emitting diode; L3-third light-emitting diode; L4-fourth light-emitting diode. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0033] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] With the development of digitalization and electrification in society, power rooms and data centers have become the basic infrastructure for production and life. However, due to long-term operation, fires are prone to occur, and the direct and indirect economic losses caused by fires are huge. Proper handling of cabinet fire protection can effectively control the fire from leaving the cabinet and reduce losses. Therefore, fire extinguishing execution equipment or cooling equipment is needed to automatically cool down or extinguish the battery to reduce losses. The automatic execution of fire extinguishing execution equipment or cooling equipment requires the configuration of the corresponding fire extinguishing system. It can be seen that the reliability of the fire extinguishing system is crucial.

[0036] At present, fire extinguishing systems equipped with fire extinguishing execution equipment or cooling equipment generally use MCU running programs to perform circuit reliability detection and control, which makes the designed fire extinguishing system structure complex and costly.

[0037] Based on the above problems, the present application designs a fire extinguishing system of an energy storage device and its energy storage system, which detects the state of the switch unit of the fire extinguishing system and the circuit state between the switch unit and the fire extinguishing execution device by setting the hardware circuit of the switch detection unit and the circuit detection unit, thereby reducing the structural complexity and cost of the fire extinguishing system, and further achieving the effect of simplifying the circuit and low cost. In addition, the switch detection unit and the circuit detection unit designed in this scheme can display the state of the switch and the circuit state between the switch unit and the fire extinguishing execution device, so that the staff can know the fault state and the cause of the fault according to the displayed state, thereby improving the timeliness and convenience of the maintenance of the drive circuit.

[0038] Based on the above ideas, the present application first provides a fire extinguishing system for an energy storage device, wherein the fire extinguishing execution equipment designed in the present solution may include but is not limited to fire extinguishing equipment, or other execution equipment such as cooling equipment, etc., wherein the fire extinguishing equipment includes but is not limited to automatic water sprinkler fire extinguishing equipment, water spray fire extinguishing equipment, gas fire extinguishing equipment, etc., and the cooling equipment includes but is not limited to water cooling equipment, air cooling equipment, etc.; Figure 1 As shown, the fire extinguishing system of the energy storage device may include a switch unit 10, a switch control unit 20, a switch detection unit 30, a circuit detection unit 40 and a fire extinguishing execution device B, wherein the input end of the switch unit 10 is used to be electrically connected to the power supply A, the switch control unit 20 is electrically connected to the control end of the switch unit 10, and the output end of the switch unit 10 is electrically connected to the fire extinguishing execution device B through the switch detection unit 30 and the circuit detection unit 40.

[0039] In the fire extinguishing system of the energy storage device designed as above, when driven, the switch control unit 20 can receive a first control signal, which can be a PWM signal. The switch control unit 20 controls the switch unit 10 to close in response to the first control signal. In this way, the power supply A transmits the transmitted electric energy to the fire extinguishing execution equipment through the switch detection unit 30 and the circuit detection unit 40, so that the fire extinguishing execution equipment performs the fire extinguishing work.

[0040] When the switch unit 10 is in a closed state, the switch detection unit 30 can perform a state detection on the switch unit 10 to detect whether the switch unit 10 has a fault, and the circuit detection unit 40 can perform a state detection on the circuit between the switch unit 10 and the fire extinguishing execution device B to detect whether the circuit between the switch unit 10 and the fire extinguishing execution device B has a fault.

[0041] The driving circuit designed above, this scheme detects the state of the switch unit of the fire extinguishing system and the circuit state between the switch unit and the fire extinguishing execution device by setting up the hardware circuit of the switch detection unit and the circuit detection unit, thereby reducing the structural complexity and cost of the fire extinguishing system, and further achieving the effect of simplifying the circuit and low cost.

[0042] In an optional implementation of this embodiment, if Figure 2 and Figure 3 As shown, the switch control unit 20 designed in this scheme may include a controllable switch tube Q1, a first resistor R1, a second resistor R2 and a capacitor C, wherein the first end of the first resistor R1 is used to receive the first control signal PWM, the second end of the first resistor R1 is electrically connected to the first end of the capacitor C, the first end of the second resistor R2 and the base of the controllable switch tube Q1, the second end of the capacitor C, the second end of the second resistor R2 and the emitter of the controllable switch tube Q1 are grounded, and the collector of the controllable switch tube Q1 is electrically connected to the control end of the switch unit 10.

[0043] In the switch control unit 20 designed above, when the first resistor R1 receives the first control signal PWM, the collector and emitter of the controllable switch tube Q1 are turned on, thereby controlling the control end of the switch unit 10 and further controlling the switch unit 10 to turn on.

[0044] In the above implementation mode, this scheme realizes the switch control of the fire extinguishing system through a simple controllable switch tube, thereby ensuring that the circuit can respond quickly through the rapid switching of the controllable switch tube, thereby improving the efficiency of the switch control of the fire extinguishing system on the basis of a simple switch control circuit structure.

[0045] In an optional implementation of this embodiment, if Figure 2 and Figure 3As shown, the power supply A designed in this scheme includes a positive power supply electrode and a negative power supply electrode. The switch unit 10 can be a double-pole double-throw relay, and the double-pole double-throw relay includes a positive contact 110, a negative contact 120 and a relay coil 130; the relay coil 130 is electrically connected to the collector of the controllable switch tube Q1 and then electrically connected to a reference voltage VCC; the positive power supply electrode A1 is electrically connected to the positive contact 110, and the negative power supply electrode A2 is electrically connected to the negative contact 120.

[0046] In the above embodiment, when the first resistor R1 receives the first control signal PWM, the collector and emitter of the controllable switch tube Q1 are turned on, so that the reference voltage VCC passes through the relay coil 130 and then is grounded, so that the relay coil 130, after being energized, generates a magnetic field to exert force on the positive contact 110 and the negative contact 120 of the relay, so that the positive contact 110 and the negative contact 120 of the relay overcome the tension of the spring and move toward the relay coil 130, thereby driving the moving contact of the armature and the static contact (normally open contact) to attract. At this time, the contact state of the relay changes, the circuit is connected, and the circuit is controlled.

[0047] In an optional implementation of this embodiment, if Figure 2 and Figure 3 As shown, the switch detection unit 30 designed in this scheme may include a positive contact detection unit 310 and a negative contact detection unit 320, the positive contact detection unit 310 is electrically connected to the positive contact 110 of the double-pole double-throw relay, and the negative contact detection unit 320 is electrically connected to the negative contact 120 of the double-pole double-throw relay.

[0048] In the switch detection unit designed as above, the positive contact detection unit 310 can detect and display the status of the positive contact 110 , and the negative contact detection unit 320 can detect and display the status of the negative contact 120 .

[0049] Specifically, as a specific implementation method, Figure 3 As shown, the positive contact detection unit 310 designed in this scheme may include a third resistor R3 and a first light-emitting diode L1; the first end of the third resistor R3 is electrically connected to the positive contact 110, the second end of the third resistor R3 is electrically connected to the positive electrode of the first light-emitting diode L1, and the negative electrode of the first light-emitting diode L1 is grounded. The negative contact detection unit 320 may include a fourth resistor R4 and a second light-emitting diode L2, the negative electrode of the second light-emitting diode L2 is electrically connected to the negative contact 120, and the positive electrode of the second light-emitting diode L2 is electrically connected to the reference voltage VCC through the fourth resistor R4.

[0050] In an optional implementation of this embodiment, if Figure 3As shown, the circuit detection unit 40 includes a short circuit detection unit 410 and an open circuit detection unit 420; the positive contact 110 of the double-pole double-throw relay is electrically connected to the first end of the short circuit detection unit 410 and the first end of the open circuit detection unit 420 respectively; the second end of the open circuit detection unit 420 is connected to the fire extinguishing execution device B and then electrically connected to the second end of the short circuit detection unit 410; the second end of the short circuit detection unit 410 is electrically connected to the negative contact 120.

[0051] Specifically, as a specific implementation method, Figure 3 As shown, the short circuit detection unit 410 designed in this scheme includes a fifth resistor R5 and a third light emitting diode L3; the open circuit detection unit 420 includes a first diode D1, a second diode D2, a sixth resistor R6 and a fourth light emitting diode L4; the first end of the fifth resistor R5, the positive electrode of the first diode D1 and the first end of the sixth resistor R6 are all electrically connected to the positive contact 110, and the second end of the fifth resistor R5 is electrically connected to the negative contact 120 through the third light emitting diode L3; the negative electrode of the first diode D1 is electrically connected to the positive electrode of the second diode D2, the second end of the sixth resistor R6 is electrically connected to the negative electrode of the second diode D2 through the fourth light emitting diode L4, and the negative electrode of the second diode D2 is electrically connected to the negative contact 120 through the fire extinguishing execution device B. Among them, the light emitting diode described in the above text of this scheme can also use other forms of display components for fault prompts. For example, the light emitting diode can also be replaced by a liquid crystal display screen, and the display screen is turned on or off to realize the fault prompt.

[0052] In the driving circuit designed above, in a normal state, the positive contact 110 and the negative contact 120 of the switch unit 10 are connected to the power supply A and are turned on. Since the third resistor R3 of the positive contact detection unit 310 is grounded through the first light-emitting diode L1, when the positive contact 110 is turned on, the third resistor R3 and the first light-emitting diode L1 are turned on. At this time, the first light-emitting diode L1 is lit, indicating that the positive contact 110 is working normally. Since the second light-emitting diode L2 of the negative contact detection unit 320 is electrically connected to the reference voltage VCC through the fourth resistor R4, when the negative contact 120 is turned on, the reference voltage VCC is turned on. The second light-emitting diode L2, the fourth resistor R4 and the negative contact 120 are turned on. At this time, the second light-emitting diode L2 is lit, indicating that the negative contact 120 is working normally; the first diode D1 and the second diode D2 connected in series between the fire extinguishing execution device B have a load current flowing through them. Therefore, the fourth light-emitting diode L4 connected in parallel with the first diode D1 and the second diode D2 is lit, indicating that there is no short circuit in the circuit between the switch unit 10 and the fire extinguishing execution device B; and there is a voltage difference between the input and output ends of the fire extinguishing execution device B. At this time, the third light-emitting diode L3 is lit, indicating that there is no short circuit in the circuit between the switch unit 10 and the fire extinguishing execution device B.

[0053] Please continue to refer to the driving circuit designed above. Figure 3 In the case where there is a circuit break in the circuit between the circuit break detection unit 420 and the fire extinguishing execution device B, since the fourth light-emitting diode L4 is connected in series with the fire extinguishing execution device, no current flows through the fourth light-emitting diode L4. At this time, the fourth light-emitting diode L4 is extinguished, and the current transmitted by the positive contact 110 flows back to the negative contact after passing through the fifth resistor R5 and the third light-emitting diode L3 to form a loop. Therefore, the first light-emitting diode L1, the second light-emitting diode L2 and the third light-emitting diode L3 are all lit. Therefore, by lighting or extinguishing the fourth light-emitting diode L4, it can be detected whether there is a circuit break in the circuit between the circuit break detection unit 420 and the fire extinguishing execution device B.

[0054] Please continue to refer to the driving circuit designed above. Figure 3 Assuming that a short circuit occurs in the circuit between the circuit break detection unit 420 and the fire extinguishing execution device B, the third light-emitting diode L3 connected in parallel with the fire extinguishing execution device B has no voltage difference, so the third light-emitting diode L3 is extinguished, and the current transmitted by the positive contact 110 passes through the first diode D1, the second diode D2, and the fourth light-emitting diode L4 and then flows back to the negative contact 120 through the short circuit to form a loop. Therefore, the first light-emitting diode L1, the second light-emitting diode L2 and the fourth light-emitting diode L4 are all lit. Therefore, by lighting or extinguishing the third light-emitting diode L3, it can be detected whether there is a short circuit in the circuit between the circuit break detection unit 420 and the fire extinguishing execution device B.

[0055] Please continue to refer to the driving circuit designed above. Figure 3 Assuming that the short circuit occurs before the third LED L3, the third LED L3 connected in parallel with the fire extinguishing execution device B has no voltage difference, so the third LED L3 is extinguished, and the current transmitted by the positive contact 110 passes through the first LED L1, the short circuit, and the second LED L2 and then flows back to the negative contact 120 to form a loop. Therefore, the first LED L1 and the second LED L2 are both bright, while no current flows through the fourth LED L4. Therefore, the fourth LED L4 and the third LED L3 are both extinguished. Therefore, whether there is a short circuit in the circuit before the third LED L3 can be detected by whether the third LED L3 and the fourth LED are both extinguished.

[0056] Please continue to refer to the driving circuit designed above. Figure 3Assume that the positive contact 110 of the switch unit 10 fails and does not operate. In this case, since the positive contact 110 cannot output current, the first light-emitting diode L1, the third light-emitting diode L3 and the fourth light-emitting diode L4 are all off, and the reference voltage VCC is connected to the negative contact through the second light-emitting diode, so the second light-emitting diode L2 is lit. Therefore, whether the positive contact 110 has a fault can be detected by whether the first light-emitting diode L1 is extinguished.

[0057] Please continue to refer to the driving circuit designed above. Figure 3 Assuming that the negative contact 120 of the switch unit 10 fails and does not operate, since a loop cannot be formed, the second light-emitting diode L2, the third light-emitting diode L3 and the fourth light-emitting diode L4 are all off. Since the positive contact 110 can output current, the current transmitted by the positive contact 110 passes through the first light-emitting diode L1 and is grounded to form a loop, thereby lighting the first light-emitting diode L1. Therefore, whether the negative contact 120 has a fault can be detected by whether the second light-emitting diode L2 is extinguished.

[0058] In the implementation mode of the above-mentioned design, the switch detection unit and the circuit detection unit designed in this scheme can display the switch status and the circuit status between the switch unit and the fire extinguishing execution device, so that the staff can know the fault status and the cause of the fault according to the displayed status, thereby improving the timeliness and convenience of the drive circuit maintenance.

[0059] The present application also provides an energy storage system, such as Figure 4 As shown, the energy storage system includes a fire extinguishing system 1 of an energy storage device of any optional embodiment described above and an energy storage device 2, wherein the fire extinguishing execution equipment B can be arranged in the environment where the energy storage device 2 is arranged. For example, when the energy storage device 2 is arranged in a factory building, the fire extinguishing execution equipment B can be arranged in the factory building, and the fire extinguishing execution equipment can extinguish a fire in the energy storage device.

[0060] The fire extinguishing system designed as above includes the fire extinguishing system of the energy storage device described above. Therefore, the designed fire extinguishing system can detect the state of the switch unit of the fire extinguishing system and the circuit state between the switch unit and the fire extinguishing execution device by setting the hardware circuit of the switch detection unit and the circuit detection unit, thereby reducing the structural complexity and cost of the fire extinguishing system, and further achieving the effect of simplifying the circuit and reducing the cost.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A fire extinguishing system for an energy storage device, characterized in that: The fire extinguishing system comprises: a switch unit, a switch control unit, a switch detection unit, a circuit detection unit and a fire extinguishing execution device; The input end of the switch unit is used to be electrically connected to the power supply, the switch control unit is electrically connected to the control end of the switch unit, and the output end of the switch unit is electrically connected to the fire extinguishing execution device through the switch detection unit and the circuit detection unit; The switch control unit is used to control the switch unit to close in response to the first control signal, so as to transmit the electric energy transmitted by the power supply to the fire extinguishing execution device through the switch detection unit and the circuit detection unit; The switch detection unit is used to detect the state of the switch unit when the switch unit is in a closed state; The circuit detection unit is used to detect the state of the circuit between the switch unit and the fire extinguishing execution device when the switch unit is in a closed state.

2. The fire extinguishing system according to claim 1, characterized in that: The switch control unit includes a controllable switch tube, a first resistor, a second resistor and a capacitor; The first end of the first resistor is used to receive the first control signal, and the second end of the first resistor is electrically connected to the first end of the capacitor, the first end of the second resistor, and the base of the controllable switch tube respectively; The second end of the capacitor, the second end of the second resistor and the emitter of the controllable switch tube are grounded, and the collector of the controllable switch tube is electrically connected to the control end of the switch unit.

3. The fire extinguishing system according to claim 2, characterized in that: The power supply includes a positive power supply electrode and a negative power supply electrode, and the switch unit includes a double-pole double-throw relay; The double-pole double-throw relay includes a positive contact, a negative contact and a relay coil; the relay coil is electrically connected to the collector of the controllable switch tube; the positive power supply electrode is electrically connected to the positive contact, and the negative power supply electrode is electrically connected to the negative contact.

4. The fire extinguishing system according to claim 3, characterized in that: The switch detection unit includes a positive contact detection unit; The positive contact detection unit is electrically connected to the positive contact of the double-pole double-throw relay, and the positive contact detection unit is used to detect and display the state of the positive contact when the switch unit is in a closed state.

5. The fire extinguishing system according to claim 4, characterized in that: The positive contact detection unit includes a third resistor and a first light emitting diode; A first end of the third resistor is electrically connected to the positive electrode contact, a second end of the third resistor is electrically connected to the positive electrode of the first light emitting diode, and a negative electrode of the first light emitting diode is grounded.

6. The fire extinguishing system according to claim 4, characterized in that: The switch detection unit also includes a negative contact detection unit; The negative contact detection unit is electrically connected to the negative contact of the double-pole double-throw relay, and the negative contact detection unit is used to detect and display the state of the negative contact when the switch unit is in a closed state.

7. The fire extinguishing system according to claim 6, characterized in that: The negative contact detection unit includes a fourth resistor and a second light emitting diode; The cathode of the second light emitting diode is electrically connected to the cathode contact, and the anode of the second light emitting diode is electrically connected to a reference voltage through the fourth resistor.

8. The fire extinguishing system according to claim 3, characterized in that: The circuit detection unit includes a short circuit detection unit and a disconnection detection unit; The positive contact of the double-pole double-throw relay is electrically connected to the first end of the short-circuit detection unit and the first end of the open-circuit detection unit respectively; The second end of the disconnection detection unit is connected to the fire extinguishing execution device and then electrically connected to the second end of the short circuit detection unit; The second end of the short circuit detection unit is electrically connected to the negative electrode contact.

9. The fire extinguishing system according to claim 8, characterized in that: The short circuit detection unit includes a fifth resistor and a third light emitting diode; the open circuit detection unit includes a first diode, a second diode, a sixth resistor and a fourth light emitting diode; The first end of the fifth resistor, the anode of the first diode and the first end of the sixth resistor are all electrically connected to the anode contact, and the second end of the fifth resistor is electrically connected to the cathode contact through the third light-emitting diode; The cathode of the first diode is electrically connected to the anode of the second diode, the second end of the sixth resistor is electrically connected to the cathode of the second diode through the fourth light-emitting diode, and the cathode of the second diode is electrically connected to the cathode contact through the fire extinguishing execution device.

10. An energy storage system, characterized in that: The energy storage system comprises a fire extinguishing system of the energy storage device according to any one of claims 1 to 9 and an energy storage device, and the fire extinguishing execution equipment is used for extinguishing a fire in the energy storage device.

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