Energy storage device

Abstract

Some embodiments of the present application provide an energy storage device, the energy storage device comprises a battery, a gas collection bin and a flame retardant mechanism, the gas collection bin can communicate with the internal space of the battery, and the flame retardant mechanism is connected to the gas collection bin and is used for introducing a first flame retardant into the gas collection bin. In the structure, as the gas collection bin is communicated with the internal space of the battery, smoke generated by the battery on fire can enter the gas collection bin, and the flame retardant mechanism can introduce a first flame retardant into the gas collection bin to dilute the smoke in the gas collection bin, so that the concentration of the smoke in the gas collection bin is reduced, and the possibility of burning explosion of the smoke is reduced; and the reliability of the energy storage device can be improved.

Description

Technical Field

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

[0002] Batteries have the advantages of high specific energy and high power density. They are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, and electric tools.

[0003] As battery applications continue to expand, they are being incorporated into energy storage devices such as energy storage containers and energy storage cabinets. Since these energy storage devices typically include multiple batteries, those skilled in the art have long been concerned with how to effectively extinguish runaway battery fires in order to improve device reliability. Summary of the Invention

[0004] In view of the above problems, the present application provides an energy storage device with good reliability.

[0005] In a first aspect, some embodiments of the present application provide an energy storage device, which includes a battery, a gas collecting bin and a flame retardant mechanism. The gas collecting bin can be connected to the internal space of the battery, and the flame retardant mechanism is connected to the gas collecting bin and is used to introduce a first flame retardant into the gas collecting bin.

[0006] In the above structure, since the gas collecting bin is connected to the internal space of the battery, the smoke generated by the battery fire can enter the gas collecting bin. The flame retardant mechanism can dilute the smoke in the gas collecting bin by introducing the first flame retardant into the gas collecting bin, thereby reducing the concentration of the smoke in the gas collecting bin and reducing the possibility of smoke combustion and explosion, which is beneficial to improving the reliability of the energy storage device.

[0007] According to the energy storage device provided in some embodiments of the present application, the energy storage device also includes a smoke detection element, a controller and a gas collecting pipeline. The gas collecting pipeline is connected between the battery and the gas collecting bin. The smoke detection element is arranged in the gas collecting pipeline. The smoke detection element and the flame retardant mechanism are communicatively connected to the controller.

[0008] Since the internal space of the battery is connected to the gas collecting bin through the gas collecting pipe, the gas collecting pipe is located upstream of the gas collecting bin. By arranging the smoke detection element in the gas collecting pipe, the smoke detection element can detect the smoke generated by the battery before the smoke enters the gas collecting bin. Before the smoke generated by the battery enters the gas collecting bin, the controller controls the flame retardant mechanism to introduce the first flame retardant into the gas collecting bin, so that when the smoke enters the gas collecting bin, the gas collecting bin is already filled with the first flame retardant, which is beneficial to reduce the possibility of smoke explosion.

[0009] According to some embodiments of the present application, the energy storage device includes a flame retardant mechanism comprising a flame retardant container and a gas charging line. The gas charging line connects the flame retardant container to a gas collection chamber, and the flame retardant container contains a first flame retardant. By connecting the gas charging line between the gas collection chamber and the flame retardant container, the flame retardant container can smoothly transfer the first flame retardant into the gas collection chamber via the gas charging line.

[0010] According to the energy storage device provided in some embodiments of the present application, the inflation pipeline includes multiple inflation branches, which are arranged at intervals. The flame retardant container is connected to the gas collecting bin through the multiple inflation branches, so that the first flame retardant in the flame retardant container passes into the gas collecting bin through multiple intervals of channels, so that the first flame retardant can be better mixed with the flue gas in the gas collecting bin.

[0011] According to the energy storage device provided in some embodiments of the present application, the gas collection chamber is provided with a first interface and a second interface, the gas collection pipeline is connected to the first interface, and the inflation pipeline is connected to the second interface, and the orientation of the first interface and the orientation of the second interface intersect. By arranging the orientations of the first interface and the second interface to intersect, the smoke entering from the gas collection pipeline and the first flame retardant entering from the inflation pipeline intersect, thereby promoting better mixing of the smoke and the first flame retardant.

[0012] According to the energy storage device provided in some embodiments of the present application, the inflation pipeline is connected between the gas collecting pipeline and the flame retardant container, so that the first flame retardant in the flame retardant container is introduced from the gas collecting pipeline, so that the smoke generated by the battery is mixed with the first flame retardant in the gas collecting pipeline, so that when the smoke gas reaches the gas collecting bin, the smoke gas and the first flame retardant are fully mixed, which is beneficial to reduce the possibility of smoke gas combustion and explosion.

[0013] According to the energy storage device provided in some embodiments of the present application, the gas collecting bin is provided with an exhaust port, which connects the internal space of the gas collecting bin with the outside world, so that the gas in the gas collecting bin can be discharged to the outside world, and the first flame retardant in the flame retardant mechanism and the smoke in the internal space of the battery can be smoothly passed into the gas collecting bin by squeezing the gas in the gas collecting bin from the exhaust port.

[0014] According to the energy storage device provided in some embodiments of the present application, the gas collecting bin is filled with a second flame retardant, so that the smoke is in an environment filled with the second flame retardant when entering the gas collecting bin, which is beneficial to reducing the possibility of smoke combustion.

[0015] According to the energy storage device provided in some embodiments of the present application, the energy storage device also includes a fire extinguishing mechanism, which is connected to the internal space of the battery and is used to introduce a third flame retardant into the internal space of the battery, so that the flame in the internal space of the battery can be extinguished by the third flame retardant.

[0016] According to the energy storage device provided in some embodiments of the present application, the energy storage device also includes a temperature detection element and a controller. The temperature detection element is arranged on the battery. The temperature detection element and the fire extinguishing mechanism are communicatively connected with the controller, so that after receiving the signal sent by the temperature detection element, the controller can control the fire extinguishing mechanism to introduce a third flame retardant into the internal space of the battery, so that the fire extinguishing mechanism can introduce the third flame retardant into the internal space of the battery to extinguish the fire when the battery catches fire.

[0017] According to the energy storage device provided in some embodiments of the present application, the energy storage device also includes a smoke detection element and a controller. The smoke detection element is arranged in the gas collecting bin, and the smoke detection element and the flame retardant mechanism are communicatively connected with the controller, so that when smoke enters the gas collecting bin, the controller can control the flame retardant mechanism to directly pass the first flame retardant into the gas collecting bin after receiving the signal sent by the smoke detection element.

[0018] According to the energy storage device provided in some embodiments of the present application, the first flame retardant includes at least one of nitrogen, carbon dioxide, and an inert gas.

[0019] The technical solutions provided by the embodiments of the present disclosure bring at least the following beneficial effects:

[0020] Some embodiments of the present application provide an energy storage device, which includes a battery, a gas collecting chamber, and a flame retardant mechanism. The gas collecting chamber can be connected to the internal space of the battery. The flame retardant mechanism is connected to the gas collecting chamber and is used to introduce a first flame retardant into the gas collecting chamber. In the above structure, since the gas collecting chamber is connected to the internal space of the battery, smoke generated by a battery fire can enter the gas collecting chamber. The flame retardant mechanism can dilute the smoke in the gas collecting chamber by introducing the first flame retardant into the gas collecting chamber, thereby reducing the concentration of the smoke in the gas collecting chamber and reducing the possibility of smoke explosion, which is conducive to improving the reliability of the energy storage device.

[0021] 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

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. Throughout the accompanying drawings, the same reference numerals are used to denote the same components.

[0023] Figure 1 A schematic diagram of a portion of the structure of an energy storage device provided in some embodiments of the present application;

[0024] Figure 2 A schematic diagram of the disassembled structure of a battery in an energy storage device provided in some embodiments of the present application;

[0025] Figure 3 A partial structural schematic diagram of an energy storage device provided in some other embodiments of the present application;

[0026] Figure 4 A partial structural diagram of an energy storage device provided in some further embodiments of the present application;

[0027] Figure 5 A schematic diagram of a portion of the structure of the energy storage device provided in some embodiments of the present application.

[0028] In the attached figure:

[0029] 1. Battery; 11. First box body; 12. Second box body; 13. Accommodation space; 2. Gas collecting chamber; 21. First interface; 22. Second interface; 23. Exhaust port; 3. Flame retardant mechanism; 31. Flame retardant container; 32. Inflating pipeline; 321. Inflating branch pipe; 5. Controller; 6. Gas collecting pipeline; 7. Fire extinguishing mechanism; 8. Wall; 80. Accommodation space; 9. First solenoid valve; 10. Second solenoid valve; 100. Battery cell. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0032] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0035] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0036] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 85°-90°, they are considered perpendicular; if the angle between two directions is 0°-5°, they are considered parallel.

[0037] The term "plurality" used in this application refers to two or more (including two).

[0038] Currently, market developments indicate that batteries are becoming increasingly widely used. They are not only used in electronic devices and vehicles, such as mobile phones, laptops, electric bicycles, electric cars, electric aircraft, electric ships, and power tools, but are also increasingly being used as energy storage devices in power systems such as hydropower, thermal power, wind power, and solar power plants.

[0039] The energy storage device mentioned in the embodiments of the present application may include one or more batteries to store or provide more electrical energy. In some embodiments, the battery may be a battery pack, which includes a box and battery cells, and the battery cells are accommodated in the box.

[0040] For example, the battery cell in the battery can be provided as one or more cells to provide higher voltage and capacity. The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0041] An energy storage device is a device that integrates electrical components and multiple batteries in a box. The electrical components and multiple batteries are coupled and connected to manage multiple batteries. The batteries can be used as a backup power source, or to reduce peak power and fill valley power when the power supply of the power system is uneven, or to adjust the frequency when the load or power generation of the power system is large, or it can be used in a photovoltaic power generation system.

[0042] In order to improve the reliability of energy storage devices, energy storage devices in the prior art are usually provided with a fire extinguishing mechanism to extinguish the battery after a fire occurs. However, since the battery after the fire will generate a large amount of flammable smoke, this smoke still has the possibility of combustion and explosion, which is not conducive to the effective resolution of the fire.

[0043] In order to further improve the reliability of the energy storage device, some embodiments of the present application provide an energy storage device, which includes a battery, a gas collecting chamber, and a flame retardant mechanism. The gas collecting chamber can be connected to the internal space of the battery, and the flame retardant mechanism is connected to the gas collecting chamber and is used to introduce a first flame retardant into the gas collecting chamber. In the above structure, since the gas collecting chamber is connected to the internal space of the battery, the smoke generated by a battery fire can enter the gas collecting chamber. The flame retardant mechanism can dilute the smoke in the gas collecting chamber by introducing the first flame retardant into the gas collecting chamber, thereby reducing the concentration of the smoke in the gas collecting chamber and reducing the possibility of smoke explosion, which is conducive to improving the reliability of the energy storage device.

[0044] The energy storage device provided in this application will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0045] Some embodiments of the present application provide an energy storage device, such as Figure 1 As shown, the energy storage device includes a battery 1, a gas collecting bin 2 and a flame retardant mechanism 3. The gas collecting bin 2 can be connected to the internal space of the battery 1. The flame retardant mechanism 3 is connected to the gas collecting bin 2 and is used to introduce a first flame retardant into the gas collecting bin 2.

[0046] The energy storage devices provided in the embodiments of the present application include energy storage containers, energy storage cabinets, etc.

[0047] like Figure 2 As shown, the battery 1 includes a housing and a battery cell 100 , wherein the battery cell 100 is accommodated in the housing. The battery cell 100 may be the smallest unit constituting the battery 1 .

[0048] The box body is used to accommodate the battery cell 100, and the box body can have various structures. In some embodiments, the box body can include a first box body portion 11 and a second box body portion 12, and the first box body portion 11 and the second box body portion 12 cover each other. The first box body portion 11 and the second box body portion 12 together define a storage space 13 for accommodating the battery cell 100. The second box body portion 12 can be a hollow structure with one end open, and the first box body portion 11 is a plate-shaped structure. The first box body portion 11 covers the open side of the second box body portion 12 to form a box body with a storage space 13; the first box body portion 11 and the second box body portion 12 can also be hollow structures with one side open, and the open side of the first box body portion 11 covers the open side of the second box body portion 12 to form a box body with a storage space 13. Of course, the first box body portion 11 and the second box body portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0049] In order to improve the sealing performance after the first box body 11 and the second box body 12 are connected, a sealing member such as a sealant or a sealing ring may be provided between the first box body 11 and the second box body 12 so that the accommodating space 13 formed by the box body is a sealed space.

[0050] Assuming that the first box body portion 11 covers the top of the second box body portion 12 , the first box body portion 11 can also be called an upper box cover, and the second box body portion 12 can also be called a lower box body.

[0051] In the battery 1, there can be one or more battery cells 100. If there are multiple battery cells 100, the multiple battery cells 100 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 100. The multiple battery cells 100 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 100 is housed in a box.

[0052] The gas collecting bin 2 may be a bin structure for collecting the smoke generated by the battery 1, and has a cavity inside. For example, the smoke generated by the battery 1 is not discharged to the outside, but enters the cavity in the gas collecting bin 2 for storage, so that the smoke generated by the battery 1 is not easily in contact with the outside air, which is beneficial to reducing the possibility of the smoke generated by the battery 1 from burning or exploding; or the smoke generated by the battery 1 enters the cavity in the gas collecting bin 2 for temporary storage and treatment, and then is discharged to the outside. The treatment of the smoke in the cavity may be cooling, dilution, or purification. Those skilled in the art can select the treatment method of the smoke in the cavity according to the actual situation, so that the treated smoke is not easily burned or exploded when discharged to the outside.

[0053] By connecting the gas collecting chamber 2 to the inner space of the battery 1 , the smoke generated in the battery 1 can smoothly enter the gas collecting chamber 2 .

[0054] The flame retardant mechanism 3 may be a mechanism for reducing the possibility of combustion and explosion of the smoke generated by the battery 1. The flame retardant mechanism 3 is connected to the gas collecting bin 2 and is used to introduce a first flame retardant into the gas collecting bin 2. The flame retardant mechanism 3 can introduce the first flame retardant into the gas collecting bin 2, so that the first flame retardant can dilute the smoke in the gas collecting bin 2, reduce the concentration of the smoke in the gas collecting bin 2, and help reduce the possibility of combustion and explosion of the smoke.

[0055] The first flame retardant can be a functional additive that can make the flammable material flame retardant. By introducing the first flame retardant that can make the smoke flame retardant into the gas collecting bin 2, not only the concentration of the smoke is reduced, but also the smoke is flame retardant, which is conducive to further reducing the possibility of smoke explosion.

[0056] In the above structure, since the gas collecting bin 2 is connected to the internal space of the battery 1, the smoke generated by a fire in the battery 1 can enter the gas collecting bin 2. The flame retardant mechanism 3 can dilute the smoke in the gas collecting bin 2 by introducing the first flame retardant into the gas collecting bin 2, thereby reducing the concentration of the smoke in the gas collecting bin 2 and reducing the possibility of the smoke gas burning and exploding, which is beneficial to improving the reliability of the energy storage device.

[0057] In some embodiments, the first flame retardant includes at least one of nitrogen, carbon dioxide, and an inert gas.

[0058] The first flame retardant includes at least one of nitrogen, carbon dioxide, and inert gas. It may mean that the first flame retardant includes nitrogen, carbon dioxide or inert gas, or the first flame retardant includes a mixture of nitrogen and carbon dioxide, a mixture of nitrogen and inert gas, or a mixture of carbon dioxide and inert gas. It may also mean that the first flame retardant includes a mixture of nitrogen, carbon dioxide and inert gas, so that the first flame retardant is stable and difficult to burn, so that after it is mixed into the flue gas, the flue gas can be made difficult to burn.

[0059] In some embodiments, the energy storage device also includes a smoke detection element, a controller 5 and a gas collecting pipeline 6. The gas collecting pipeline 6 is connected between the battery 1 and the gas collecting bin 2. The smoke detection element is arranged in the gas collecting pipeline 6. The smoke detection element and the flame retardant mechanism 3 are communicated with the controller 5.

[0060] The smoke detection element may be a detection element for detecting smoke generated by the battery 1 . The smoke detection element may send a signal when smoke is detected.

[0061] The controller 5 can be configured to control whether the flame retardant mechanism 3 introduces the first flame retardant into the gas collection chamber 2. By connecting both the smoke detection element and the flame retardant mechanism 3 to the controller 5 for communication, the controller 5 can control the flame retardant mechanism 3 to introduce the first flame retardant into the gas collection chamber 2 upon receiving a signal from the smoke detection element. This allows the flame retardant mechanism 3 to introduce the first flame retardant into the gas collection chamber 2 when smoke is generated by the battery 1, thereby diluting the smoke.

[0062] The gas collecting pipe 6 may be a pipe structure for connecting the internal space of the battery 1 with the cavity of the gas collecting chamber 2. By connecting the gas collecting pipe 6 between the battery 1 and the gas collecting chamber 2, the smoke generated by the battery 1 is passed into the gas collecting chamber 2 through the gas collecting pipe 6.

[0063] Since the internal space of the battery 1 is connected to the gas collecting bin 2 through the gas collecting pipe 6, the gas collecting pipe 6 is located upstream of the gas collecting bin 2. By arranging the smoke detection element in the gas collecting pipe 6, the smoke detection element can detect the smoke generated by the battery 1 before the smoke enters the gas collecting bin 2. Before the smoke generated by the battery 1 enters the gas collecting bin 2, the controller 5 controls the flame retardant mechanism 3 to introduce the first flame retardant into the gas collecting bin 2, so that when the smoke enters the gas collecting bin 2, the gas collecting bin 2 is already filled with the first flame retardant, which is beneficial to reduce the possibility of smoke explosion.

[0064] In some embodiments, a smoke detection element and a controller 5 are further included. The smoke detection element is arranged in the gas collecting bin 2 , and the smoke detection element and the flame retardant mechanism 3 are communicatively connected with the controller 5 .

[0065] As in the above technical solution, the smoke detection element can be a detection element for detecting the smoke generated by the battery 1, which can send a signal to the outside when smoke is detected; the controller 5 can control whether the flame retardant mechanism 3 introduces the first flame retardant into the gas collecting bin 2.

[0066] By providing a smoke detection element in the gas collecting bin 2, the smoke detection element can detect whether smoke has entered the gas collecting bin 2. When smoke enters the gas collecting bin 2, the smoke detection element in the gas collecting bin 2 detects the smoke and sends a signal to the controller 5. After receiving the signal from the smoke detection element, the controller 5 can control the flame retardant mechanism 3 to directly introduce the first flame retardant into the gas collecting bin 2.

[0067] In some embodiments, the flame retardant mechanism 3 includes a flame retardant container 31 and a gas charging line 32 . The gas charging line 32 connects the flame retardant container 31 to the gas collecting bin 2 . The flame retardant container 31 contains a first flame retardant.

[0068] The flame retardant container 31 may be a container for containing a first flame retardant. For example, the first flame retardant may be a gaseous flame retardant, and the flame retardant container 31 may be a gas cylinder containing the first flame retardant at a pressure greater than the pressure in the gas collection bin 2, so that the first flame retardant can be quickly introduced into the gas collection bin 2 for thorough mixing with the smoke in the gas collection bin 2.

[0069] The gas charging line 32 may be a line for connecting the flame retardant container 31 to the cavity of the gas collecting bin 2. By connecting the gas charging line 32 between the gas collecting bin 2 and the flame retardant container 31, the flame retardant container 31 can smoothly pass the first flame retardant into the gas collecting bin 2 through the gas charging line 32.

[0070] For example, a first solenoid valve 9 is provided in the inflation line 32, and the first solenoid valve 9 can control the connection and disconnection between the flame retardant container 31 and the gas collecting chamber 2. The first solenoid valve 9 is in communication with the controller 5. Under the control of the controller 5, the first solenoid valve 9 can connect the flame retardant container 31 and the gas collecting chamber 2 or disconnect the flame retardant container 31 from the gas collecting chamber 2, so that the flame retardant mechanism 3 can introduce the first flame retardant into the gas collecting chamber 2 under the control of the controller 5.

[0071] In some embodiments, as Figure 3 As shown, the inflation pipeline 32 includes a plurality of inflation branches 321 , and the plurality of inflation branches 321 are arranged at intervals.

[0072] By making the inflation pipeline 32 include multiple inflation branches 321 arranged at intervals, the flame retardant container 31 is connected to the gas collecting bin 2 through multiple inflation branches 321, so that the first flame retardant in the flame retardant container 31 is passed into the gas collecting bin 2 through multiple intervals of channels, so that the first flame retardant can be better mixed with the flue gas in the gas collecting bin 2.

[0073] In some embodiments, as Figure 1 As shown, the gas collecting bin 2 is provided with a first interface 21 and a second interface 22 , the gas collecting pipeline 6 is connected to the first interface 21 , the inflation pipeline 32 is connected to the second interface 22 , and the directions of the first interface 21 and the second interface 22 intersect.

[0074] The first interface 21 and the second interface 22 can be interfaces provided on the wall 8 of the gas collecting chamber 2, both of which connect the cavity of the gas collecting chamber 2 with the outside world. The first interface 21 is used to connect to the gas collecting pipeline 6, and the second interface 22 is used to connect to the inflation pipeline 32.

[0075] By arranging the orientation of the first interface 21 to intersect with the orientation of the second interface 22 , the smoke introduced from the gas collecting pipeline 6 intersects with the first flame retardant introduced from the inflation pipeline 32 , so that the smoke and the first flame retardant can be better mixed.

[0076] In some embodiments, as Figure 4 As shown, the inflation pipeline 32 is connected between the gas collecting pipeline 6 and the flame retardant container 31.

[0077] By connecting the inflation pipe 32 between the gas collecting pipe 6 and the flame retardant container 31, the first flame retardant in the flame retardant container 31 is introduced from the gas collecting pipe 6, so that the smoke generated by the battery 1 is mixed with the first flame retardant in the gas collecting pipe 6. When the smoke gas reaches the gas collecting bin 2, the smoke gas and the first flame retardant are fully mixed, which is beneficial to reduce the possibility of combustion and explosion of the smoke gas.

[0078] In some embodiments, the gas collecting bin 2 is provided with an exhaust port 23 , which connects the interior space of the gas collecting bin 2 with the outside world.

[0079] The exhaust port 23 may be an opening that connects the interior space of the gas collecting bin 2 with the outside world, and is provided on the wall of the gas collecting bin 2. By providing the exhaust port 23 on the wall of the gas collecting bin 2 to connect the interior space of the gas collecting bin 2 with the outside world, the gas in the gas collecting bin 2 can be discharged to the outside world, and the first flame retardant in the flame retardant mechanism 3 and the smoke in the interior space of the battery 1 can be smoothly passed into the gas collecting bin 2 by squeezing the gas in the gas collecting bin 2 out of the exhaust port 23.

[0080] In some embodiments, the gas collecting chamber 2 is filled with a second flame retardant.

[0081] The second flame retardant can be a functional additive that can make flammable substances flame retardant. By filling the gas collection bin 2 with the second flame retardant that can make the smoke flame retardant, the smoke enters the gas collection bin 2 in an environment filled with the second flame retardant, which helps reduce the possibility of smoke combustion.

[0082] The second flame retardant includes at least one of nitrogen, carbon dioxide, and inert gas. It may mean that the second flame retardant includes nitrogen, carbon dioxide or inert gas, or the second flame retardant includes mixed nitrogen and carbon dioxide, mixed nitrogen and inert gas, or mixed carbon dioxide and inert gas. It may also mean that the second flame retardant includes mixed nitrogen, carbon dioxide and inert gas, so that the second flame retardant is stable and difficult to burn, so that the smoke mixed into the gas collecting bin 2 is difficult to burn.

[0083] For example, the second flame retardant may be the same as the first flame retardant, or may be different from the second flame retardant. Those skilled in the art may select the type of the second flame retardant according to actual conditions.

[0084] In some embodiments, the energy storage device further includes a fire extinguishing mechanism 7 , which is connected to the internal space of the battery 1 and is used to introduce a third flame retardant into the internal space of the battery 1 .

[0085] The fire extinguishing mechanism 7 may be a mechanism for extinguishing a fire in the battery 1. The fire extinguishing mechanism 7 is in communication with the internal space of the battery 1 and extinguishes a fire in the internal space of the battery 1 by introducing a third flame retardant into the internal space of the battery 1.

[0086] The third flame retardant may be a functional auxiliary agent that can impart flame retardancy to a flammable substance. By introducing the third flame retardant into the internal space of the battery 1 , the flame in the internal space of the battery 1 can be extinguished by the third flame retardant.

[0087] The third flame retardant may include at least one of nitrogen, carbon dioxide, and an inert gas. This may mean that the third flame retardant includes nitrogen, carbon dioxide, or an inert gas, or includes a mixture of nitrogen and carbon dioxide, a mixture of nitrogen and an inert gas, or a mixture of carbon dioxide and an inert gas. The third flame retardant may also include a mixture of nitrogen, carbon dioxide, and an inert gas, so that the third flame retardant is stable and difficult to burn, so that after it is filled into the internal space of the battery 1, it can extinguish the flame in the battery 1 and achieve fire extinguishing.

[0088] In some embodiments, the energy storage device further includes a temperature detection element and a controller 5 . The temperature detection element is disposed on the battery 1 . The temperature detection element and the fire extinguishing mechanism 7 are in communication with the controller 5 .

[0089] The temperature detection element may be a detection element capable of detecting the temperature of the environment in which it is located. By arranging the temperature detection element on the battery 1, the temperature detection element can send a signal when it detects that the temperature exceeds a preset value.

[0090] By connecting the temperature detection element and the fire extinguishing mechanism 7 to the controller 5 for communication, the controller 5 can control the fire extinguishing mechanism 7 to introduce the third flame retardant into the internal space of the battery 1 after receiving the signal from the temperature detection element, so that the fire extinguishing mechanism 7 can introduce the third flame retardant into the internal space of the battery 1 to extinguish the fire when the battery 1 catches fire.

[0091] Illustratively, the fire extinguishing mechanism 7 includes a second solenoid valve 10, which controls whether the fire extinguishing mechanism 7 introduces a third flame retardant into the battery 1 by controlling the on / off switching of the fire extinguishing mechanism 7. By communicatively connecting the second solenoid valve 10 and the fire extinguishing mechanism 7 to the controller 5, the controller 5 can control the second solenoid valve 10 to be connected upon receiving a signal from the temperature detection element, thereby causing the fire extinguishing mechanism 7 to introduce the third flame retardant into the internal space of the battery 1.

[0092] In some embodiments, as Figure 5 As shown, the energy storage device further includes a wall 8 , which forms an accommodating space 80 , in which the fire extinguishing mechanism 7 , the gas collecting bin 2 , the gas collecting pipeline 6 , the controller 5 , the flame retardant mechanism 3 and the battery 1 are all arranged.

[0093] The wall 8 may be the outer shell structure of the energy storage device, which can form an accommodating space 80 for accommodating other components of the energy storage device, thereby providing good protection for other components in the energy storage device and improving the reliability of the energy storage device.

[0094] When the energy storage device is an energy storage container, the wall 8 is the box wall of the energy storage container; when the energy storage device is an energy storage cabinet, the wall 8 is the cabinet wall of the energy storage cabinet.

[0095] By arranging the fire extinguishing mechanism 7, the gas collecting bin 2, the gas collecting pipeline 6, the controller 5, the flame retardant mechanism 3 and the battery 1 in the accommodating space 80, the fire extinguishing mechanism 7, the gas collecting bin 2, the gas collecting pipeline 6, the controller 5, the flame retardant mechanism 3 and the battery 1 are all protected by the wall 8, which is beneficial to reducing the impact of the external environment on the operation of the energy storage device and improving the reliability of the energy storage device.

[0096] Some embodiments of the present application provide an energy storage device, such as Figure 5 As shown, the energy storage device includes a wall 8, a battery 1, a gas collecting bin 2, a flame retardant mechanism 3, a temperature detection element, a smoke detection element, a controller 5, a gas collecting pipeline 6 and a fire extinguishing mechanism 7. The wall 8 encloses a accommodating space 80, and the battery 1, the gas collecting bin 2, the flame retardant mechanism 3, the controller 5, the gas collecting pipeline 6 and the fire extinguishing mechanism 7 are all arranged in the accommodating space 80. The fire extinguishing mechanism 7 is connected to the internal space of the battery 1 and is used to introduce a third flame retardant into the internal space of the battery 1. The gas collecting bin 2 is connected to the internal space of the battery 1 through the gas collecting pipeline 6. The flame retardant mechanism 3 includes a flame retardant container 31 and a gas charging pipeline 32. The gas charging pipeline 32 is connected between the flame retardant container 31 and the gas collecting pipeline 6. The flame retardant container 31 is used to introduce a first flame retardant into the gas collecting bin 2 through the gas charging pipeline 32 and the gas collecting pipeline 6. The gas collecting bin 2 is provided with an exhaust port 23, and is filled with a second flame retardant. A temperature detection element is disposed within the interior space of battery 1, and a smoke detection element is disposed within gas collection line 6. The temperature detection element, fire extinguishing mechanism 7, smoke detection element, and flame retardant mechanism 3 are communicatively connected to controller 5. In the above structure, since gas collection chamber 2 is connected to the interior space of battery 1, smoke generated by a fire in battery 1 can enter gas collection chamber 2. Flame retardant mechanism 3 can dilute the smoke in gas collection chamber 2 by introducing a first flame retardant into gas collection chamber 2, thereby reducing the concentration of smoke in gas collection chamber 2 and the possibility of smoke explosion, thereby improving the reliability of the energy storage device.

[0097] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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. An energy storage device, characterized in that: include: Battery; A gas collecting chamber, capable of being connected to the internal space of the battery; The flame retardant mechanism is connected to the gas collecting bin and is used to introduce a first flame retardant into the gas collecting bin.

2. The energy storage device according to claim 1, characterized in that It also includes a smoke detection element, a controller and a gas collection pipeline. The gas collection pipeline is connected between the battery and the gas collection bin. The smoke detection element is arranged in the gas collection pipeline. The smoke detection element and the flame retardant mechanism are communicatively connected with the controller.

3. The energy storage device according to claim 2, characterized in that The flame retardant mechanism includes a flame retardant container and a gas charging pipeline. The gas charging pipeline connects the flame retardant container to the gas collecting bin. The flame retardant container contains the first flame retardant.

4. The energy storage device according to claim 3, characterized in that The inflation pipeline includes a plurality of inflation branches, and the plurality of inflation branches are arranged at intervals.

5. The energy storage device according to claim 3, characterized in that The gas collecting bin is provided with a first interface and a second interface, the gas collecting pipeline is connected to the first interface, the inflation pipeline is connected to the second interface, and the orientation of the first interface intersects with the orientation of the second interface.

6. The energy storage device according to claim 3, characterized in that The gas charging pipeline is connected between the gas collecting pipeline and the flame retardant container.

7. The energy storage device according to claim 1, characterized in that The gas collecting bin is provided with an exhaust port, and the exhaust port connects the internal space of the gas collecting bin with the outside world.

8. The energy storage device according to claim 1, characterized in that The gas collecting bin is filled with a second flame retardant.

9. The energy storage device according to claim 1, characterized in that The battery further includes a fire extinguishing mechanism, which is connected to the internal space of the battery and is used to introduce a third flame retardant into the internal space of the battery.

10. The energy storage device according to claim 9, characterized in that: It also includes a temperature detection element and a controller. The temperature detection element is arranged on the battery. The temperature detection element and the fire extinguishing mechanism are in communication connection with the controller.

11. The energy storage device according to claim 1, characterized in that It also includes a smoke detection element and a controller. The smoke detection element is arranged in the gas collecting bin. The smoke detection element and the flame retardant mechanism are communicatively connected with the controller.

12. The energy storage device according to claim 1, characterized in that The first flame retardant includes at least one of nitrogen, carbon dioxide, and an inert gas.

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