Energy storage device with fire-fighting function and energy storage system

Abstract

The embodiment of the utility model provides an energy storage device with a fire-fighting function and an energy storage system, the energy storage device comprises a box body and a battery module, and the battery module is arranged in the box body; the energy storage device further comprises a smoke detector, a combustible gas detector, a gas suction pipeline, a gas exhaust pipeline and a gas suction pump. The smoke detector and the combustible gas detector jointly extract gas from the box body through the gas suction pipeline through the gas suction pump. The smoke detector and the combustible gas detector share the sampling pipeline, the structure is simple, and the occupied space is low. The whole detection system is integrated, the comprehensive cost of the detection system is reduced, and high-energy density evolution is facilitated. A sampling part can be decoupled from the detector, so that the detector is flexible and changeable in mounting position, can be mounted outside an electrical bin or a box, and is convenient to maintain, replace and evolve at high energy density. And during external installation, no detonation risk exists when the PACK is out of control, and the detector can adopt non-explosion-proof type selection, so that the cost is reduced. And the sampling positions are flexible and changeable, such as weak positions in the box.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to an energy storage device and an energy storage system with fire-fighting functions. Background Art

[0002] The energy storage device in the related technology includes a box, a battery module, and multiple smoke detectors and multiple combustible gas detectors. The battery module is placed in the box, and multiple smoke detectors and multiple combustible gas detectors are installed at different positions in the box. When combustion occurs in the box, smoke or combustible gas is generated. When the smoke and combustible gas move in the box to the vicinity of the smoke detector and the combustible gas detector, the smoke detector and the combustible gas detector detect whether the nearby gas is abnormal to determine whether the battery module is burning. However, the method of installing multiple smoke detectors and multiple combustible gas detectors at different positions of the box not only has low detection accuracy but also poor timeliness. Utility Model Content

[0003] The embodiments of the present application provide an energy storage device and an energy storage system with fire-fighting functions to solve the problems of low detection accuracy and poor timeliness.

[0004] In a first aspect, an embodiment of the present application provides an energy storage device, which includes a housing and a battery module, wherein the battery module is disposed in a accommodating cavity; the energy storage device also includes a smoke detector, a combustible gas detector, an air intake pipe, an exhaust pipe and an air pump, wherein the air intake pipe includes a connected air inlet and an air outlet, the exhaust pipe includes an air inlet and at least two air outlets connected to the air inlet of the exhaust pipe, the air inlet of the air intake pipe is arranged in the housing, the air pump is connected between the air outlet of the air intake pipe and the air inlet of the exhaust pipe, one air outlet of the exhaust pipe is used to transport the gas flowing out of one air outlet to the smoke detector, and the other air outlet of the exhaust pipe is used to transport the gas flowing out of the other air outlet to the combustible gas detector.

[0005] In this embodiment, when the vacuum pump is working, the gas in the box enters through the air inlet of the suction line, then flows into the inlet of the vacuum pump through the air outlet of the suction line, and flows to the air inlet of the exhaust line through the outlet of the vacuum pump, and then flows to the smoke detector through one air outlet of the exhaust line, and at the same time flows to the combustible gas detector through another air outlet of the exhaust line. The smoke detector is used to detect the concentration of smoke in the gas flowing in through one air outlet to determine whether the battery module in the box is burning or exploding. Similarly, the combustible gas detector is used to detect the concentration of combustible gas in the gas flowing in through another air outlet to determine whether the battery module in the box is burning or exploding.

[0006] In addition, compared to the combustible gas detector that does not use an air pump, the combustible gas detector in this embodiment detects the gas in the box by pumping air with an air pump, which can increase the speed at which the gas in the box flows to the combustible gas detector and increase the amount of gas that interacts with the combustible gas detector per unit time, thereby improving the detection timeliness and detection accuracy of the combustible gas detector. Similarly, the smoke detector detects the gas in the box by pumping air with an air pump, which can also improve the detection effect and detection accuracy of the smoke detector.

[0007] In addition, since the smoke detector and the combustible gas detector can share the air suction pipeline, the number of air suction pipelines can be reduced, and the number of air pumps can be reduced, thereby reducing costs. Moreover, since the number of air suction pipelines is reduced, the difficulty of reasonably arranging the air suction pipelines in the box can be reduced.

[0008] In some embodiments, the smoke detector, the combustible gas detector, the exhaust pipe and the vacuum pump are all located outside the box, the suction pipe extends from inside the box to the outside of the box, and the air outlet of the suction pipe is connected to the inlet of the vacuum pump outside the box. In this embodiment, since the smoke detector, the combustible gas detector, the exhaust pipe and the vacuum pump are all located outside the box, the power and volume of the vacuum pump can be designed to be larger, so that the gas at multiple positions in the box can be extracted to the smoke detector and the combustible gas detector by one vacuum pump, so there is no need to arrange multiple smoke detectors and multiple combustible gas detectors in the box, but a small number of smoke detectors and combustible gas detectors (such as one smoke detector and one combustible gas detector) can be used to detect multiple positions in the box, thereby effectively reducing the number of smoke detectors and combustible gas detectors and reducing costs.

[0009] In addition, since smoke detectors, combustible gas detectors, exhaust pipes and vacuum pumps are all located outside the box, they can free up space in the box and increase the proportion of battery modules in the box, thereby increasing the energy density of the energy storage device.

[0010] In some embodiments, the smoke detector is a non-explosion-proof smoke detector. Since the smoke detector is located outside the box, the smoke detector can be non-explosion-proof to prevent the explosion of the smoke detector from damaging the battery module or electrical components in the box. In addition, the cost of non-explosion-proof smoke detectors is lower.

[0011] In some embodiments, the energy storage device further includes a fire cabinet, and the smoke detector, the combustible gas detector, the exhaust pipeline and the air pump are all located in the fire cabinet, the fire cabinet is located outside the box, the air suction pipeline extends from inside the box to outside the box, and extends into the fire cabinet, and the air outlet of the air suction pipeline is connected to the inlet of the air pump in the fire cabinet. In this embodiment, since the smoke detector, the combustible gas detector, the exhaust pipeline and the air pump are all located in the fire cabinet, they can avoid wind and rain, and can also improve the integration of fire protection components for subsequent maintenance.

[0012] In some embodiments, the housing includes an electrical compartment and a battery compartment arranged along the length direction of the housing, the battery module is disposed in the battery compartment, the energy storage device also includes electrical components disposed in the battery compartment, the air intake duct extends into the battery compartment and the electrical compartment respectively along the length direction of the housing, the air intake duct has at least two air inlets, one of the air inlets of the air intake duct is disposed at a portion of the air intake duct located in the battery compartment, and the other air inlet is disposed at a portion of the air intake duct located in the electrical compartment. In this embodiment, the gas in the battery compartment can be drawn to the smoke detector and the combustible gas detector through the air inlet of the air intake duct located in the battery compartment to detect whether the battery pack in the battery compartment has thermal runaway, combustion or explosion, and the gas in the electrical compartment can be drawn to the smoke detector and the combustible gas detector through the air intake of the air intake duct located in the electrical compartment to detect whether the electrical components in the electrical compartment have combustion or explosion. Since smoke detectors and flammable gas detectors detect gas by extracting gas through vacuum pumps and suction pipes, the electrical compartment and battery compartment can share smoke detectors and flammable gas detectors without the need to add additional smoke detectors and flammable gas detectors to detect the electrical compartment. This can reduce the number of smoke detectors and flammable gas detectors, and achieve cost-effective detection of safety conditions in the electrical compartment.

[0013] In some embodiments, the air intake pipeline includes a main pipeline and a plurality of sub-pipelines arranged at intervals along the width direction of the box body, the extension direction of the plurality of sub-pipelines is consistent with the length direction of the box body, the plurality of sub-pipelines are arranged on the top wall of the box body facing the side of the box body, the plurality of sub-pipelines are connected to the main pipeline, the main pipeline is provided with an air outlet of the air intake pipeline for connecting to the inlet of the air pump, and each sub-pipeline is provided with an air inlet of the air intake pipeline. In this embodiment, since the plurality of sub-pipelines are provided with air inlets, the gas in the box body can be absorbed through the plurality of sub-pipelines, and since the plurality of sub-pipelines are arranged at intervals in the width direction of the box body, the plurality of air inlets of the air intake pipeline are arranged at intervals in the width direction of the box body, so that the gas at different positions in the width direction of the box body can be more evenly absorbed, so as to improve the detection efficiency of the smoke detector and the combustible gas detector.

[0014] In some embodiments, the air intake pipeline further includes a branch pipeline connected to a sub-pipeline, the branch pipeline extends in a direction from the top wall of the box toward the bottom wall, and the branch pipeline is provided with an air inlet of the air intake pipeline. In this embodiment, since the branch pipeline extends in a direction from the top wall of the box toward the bottom wall, gas at different positions in the height direction of the box can be extracted for detection, thereby improving the detection efficiency of the smoke detector and the combustible gas detector.

[0015] In some embodiments, the battery module includes a plurality of battery clusters arranged along the length direction of the casing, each of the plurality of battery clusters includes a plurality of stacked battery packs, the energy storage device also includes a plurality of flues extending in the stacking direction of the plurality of battery packs, the arrangement direction of the plurality of flues is the same as the arrangement direction of the plurality of battery clusters, and the pressure relief ports of the plurality of battery packs of each battery cluster are connected to a flue; the intake duct also includes a plurality of branch-pipelines connected to another sub-pipeline, the plurality of branch-pipelines are arranged at intervals along the extension direction of another sub-pipeline, and the extension direction of the plurality of branch-pipelines is from the top wall toward the bottom wall of the casing, the plurality of branch-pipelines are provided with air inlets of the intake ducts, and the plurality of branch-pipelines are arranged one-to-one in the plurality of flues. In the present embodiment, since each flue corresponds to a battery cluster, that is, each flue can collect the gas discharged when multiple battery packs of a battery cluster are depressurized, and each flue is provided with a branch pipe, and the branch pipe is provided with an air inlet of the intake pipe, so that the status of multiple battery packs of a battery cluster can be detected simultaneously through one intake pipe, which can improve the detection efficiency and the detection accuracy.

[0016] In some embodiments, the battery module includes a plurality of battery clusters arranged along the length direction of the casing, each of the plurality of battery clusters includes a plurality of stacked battery packs; the intake duct also includes a plurality of branch ducts connected to another sub-duct, the plurality of branch ducts are spaced apart along an extension direction of another sub-duct, and the extension direction of the plurality of branch ducts is from the top wall toward the bottom wall of the casing, and a plurality of spaced intake duct air inlets are provided along the extension direction of the branch ducts, and the plurality of air inlets on each branch duct are arranged one by one next to the pressure relief ports of the plurality of battery packs of each battery cluster. In the present embodiment, since the multiple air inlets on each branch pipe are arranged one-to-one next to the pressure relief ports of the multiple battery packs of each battery cluster, the multiple battery packs of each battery cluster correspond to the positions of the air inlets of the multiple air intake pipes on a branch pipe, so that each branch pipe can detect the status of the multiple battery packs of a battery cluster, and since there is an air inlet of the air intake pipe next to the pressure relief port of each battery pack, the gas during pressure relief of each battery pack can be extracted more accurately and timely, and the status of the battery pack can be obtained more accurately and timely.

[0017] In some embodiments, the battery module includes a plurality of battery clusters arranged along the length direction of the box body, each of the plurality of battery clusters includes a plurality of stacked battery packs, and each of the plurality of battery packs of the plurality of battery clusters includes an air intake port; the air intake duct also includes a plurality of branch ducts connected to another sub-duct, the plurality of branch ducts are arranged at intervals along the extension direction of another sub-duct, and the extension direction of the plurality of branch ducts is from the top wall toward the bottom wall of the box body, and a plurality of branch ducts are provided with a plurality of spaced air inlets of the air intake ducts along the extension direction of the branch ducts, and the plurality of air inlets on each branch duct are connected one-to-one to the air intake ports of the plurality of battery packs of each battery cluster. In the present embodiment, since the multiple battery packs of each battery cluster in the multiple battery clusters include a gas collection port, and the multiple air inlets on each branch pipe are connected to the gas collection ports of the multiple battery packs of each battery cluster in a one-to-one correspondence, the multiple battery packs of each battery cluster are connected to the air inlets of the multiple air intake pipes on a branch pipe, so that each branch pipe can detect the status of the multiple battery packs of a battery cluster, and since the gas collection port of each battery pack is connected to the air inlet of an air intake pipe, the gas in each battery pack can be extracted more accurately and timely, and the status of the battery pack can be obtained more accurately and timely. Since the status of the battery pack can be obtained in time, it can prevent thermal runaway of the battery pack.

[0018] In some embodiments, the fire cabinet is hung on the side wall of the box, and in the height direction of the box, the fire cabinet is located between the top wall and the bottom wall of the box, and part of the air suction pipeline passes through the side wall of the box where the fire cabinet is hung, the side wall where the fire cabinet contacts the box, and enters the fire cabinet in sequence, and the air outlet of the air suction pipeline is connected to the inlet of the air pump in the fire cabinet. In this embodiment, the fire cabinet is hung on the side wall of the box with an air pipe through hole, and in the height direction of the box, the fire cabinet is located between the top wall and the bottom wall of the box, so that there is a gap between the bottom wall of the fire cabinet and the ground, thereby reducing the floor space and concrete foundation cost, and because the fire cabinet is in direct contact with the box, the length of the air suction pipeline extending out of the box can be reduced.

[0019] In some embodiments, a tripod is provided on the side wall of the fire cabinet, and the energy storage device further includes a tripod, a portion of the tripod is fixedly connected to the side wall of the fire cabinet, another portion of the tripod extends in a direction parallel to the bottom wall of the fire cabinet, and is flush with the bottom wall of the fire cabinet in the height direction of the fire cabinet, and the bottom wall of the fire cabinet and the other portion of the tripod are used to be placed on the ground together. In this embodiment, by placing the bottom wall of the fire cabinet and the other portion of the tripod on the ground together, the stability of the fire cabinet placed on the ground can be improved, and the other portion of the tripod can also be fixed to the ground by fasteners, further improving the fixing stability of the fire cabinet.

[0020] In some embodiments, the side wall of the fire extinguishing cabinet is arranged in contact with the side wall of the box body. In this embodiment, since the side wall of the box body is arranged in contact with the fire extinguishing cabinet, the stability of the fire extinguishing cabinet standing on the ground can be improved.

[0021] In some embodiments, the fire cabinet and the box body are spaced apart, and the portion of the air intake line between the box body and the fire cabinet is pre-buried underground. In this embodiment, since the fire cabinet and the box body are spaced apart, it is equivalent to increasing the distance between the fire cabinet and the box body, so that when the battery module in the box body burns or explodes, it should not affect the normal operation of the fire fighting components in the fire cabinet, so as to improve stability, and can also improve the operability of the installation of the energy storage device, and install the fire cabinet in a position that will not affect the installation of other energy storage devices. In addition, since the portion of the air intake line between the box body and the fire cabinet is pre-buried underground, it can increase reliability and prevent damage by accidental contact.

[0022] In a second aspect, an embodiment of the present application provides an energy storage system, comprising a power converter and an energy storage device as described in any one of the first aspects above, wherein the power converter is connected to the energy storage device and is used to perform power conversion on a current input to the energy storage device or output from the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 An application scenario diagram of an energy storage system provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of an energy storage device provided in an embodiment of the present application;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure in which some components of the energy storage device are shown in dotted lines;

[0027] Figure 4 for Figure 3 A schematic diagram of the structure of a detection component in an energy storage device;

[0028] Figure 5A A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0029] Figure 5B A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0030] Figure 5C A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of another energy storage device provided in an embodiment of the present application;

[0034] Fig. 9 for Figure 8 A local enlarged schematic diagram of point A in the middle. Description of the drawings:

[0036] X, the length direction of the box; Y, the width direction of the box; Z, the height direction of the box; 1000, energy storage system; 1, energy storage device; 2, power converter;

[0037] 10. Box body; 101. Accommodation cavity; 102. Electrical compartment; 103. Battery compartment; 11. Bottom wall of box body; 12. Top wall of box body; 13. Side wall of box body; 131. First wall; 132. Second wall; 133. Third wall; 134. Fourth wall; 14. Door panel;

[0038] 20. Fire cabinet; 21. Top wall of fire cabinet; 22. Bottom wall of fire cabinet; 23. Side wall of fire cabinet;

[0039] 30. Battery module; 31. Battery cluster; 311. Battery pack; 3111. Pressure relief port of battery pack; 3112. Gas collection port;

[0040] 40. Detection assembly; 41. Smoke detector; 42. Combustible gas detector; 43. Air pump; 431. Inlet of air pump; 432. Outlet of air pump; 44. Exhaust pipeline; 441. Air inlet of exhaust pipeline; 442. Air outlet of exhaust pipeline; 4421. First air outlet; 4422. Second air outlet;

[0041] 50, air suction pipeline; 501, air inlet of the air suction pipeline; 502, air outlet of the air suction pipeline; 51, main pipeline; 52, sub-pipeline; 53, branch pipeline;

[0042] 60. A tripod; 61. A portion of a tripod; 62. Another portion of a tripod;

[0043] 70. Flue. DETAILED DESCRIPTION

[0044] The following first explains some terms involved in the embodiments of the present application.

[0045] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] In this specification, the terms "perpendicular", "parallel", etc. are explained.

[0047] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 60 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0048] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. These situations will lead to the sliding fitting part and the first door panel not being absolutely parallel, but this application also defines this situation as parallelism.

[0049] Figure 1 An application scenario diagram of an energy storage system 1000 provided in an embodiment of the present application, wherein: Figure 1 The energy storage system 1000 is shown in three scenarios: applied on the power supply side, the distribution side and the user side.

[0050] Reference Figure 1 The energy storage system 1000 includes an energy storage device 1 and a power converter 2. The energy storage device 1 is connected to the power converter 2. The energy storage device is used to store electric energy. The power converter 2 is used to perform power conversion on the current input to the energy storage device 1 or the current output from the energy storage device 1.

[0051] Among them, the energy storage system 1000 can be used on the power supply side, the distribution side and the user side. For example, the energy storage system 1000 on the power supply side provides storage and output management for the electric energy output by the DC source, the energy storage system 1000 on the distribution side provides intelligent load management for the transmission and distribution side, and the energy storage system 1000 on the user side provides users with peak shaving and valley filling mode and stable power quality management.

[0052] Figure 2 The schematic diagram of the structure of an energy storage device 1 provided in the embodiment of the present application. The energy storage device 1 in this embodiment can be applied not only to Figure 1 The energy storage system 1000 in the embodiment may also be applied to other systems or devices that require the use of the energy storage device 1 , such as applying the energy storage device 1 to a data center. Figure 3 for Figure 2 A schematic structural diagram in which some components of the energy storage device are shown in dotted lines.

[0053] Reference Figure 2 and Figure 3 The energy storage device 1 includes a box body 10 and a battery module 30 located in the box body 10 . Specifically, the box body 10 is provided with a receiving cavity 101 , and the battery module 30 is disposed in the receiving cavity 101 .

[0054] In some embodiments, the box body 10 is substantially in the shape of a rectangular parallelepiped, and includes a bottom wall 11, a top wall 12, and four side walls 13 connecting the bottom wall 11 and the top wall 12. For the convenience of description, the two side walls 13 opposite to each other in the length direction X of the box body 10 are respectively a first wall 131 and a second wall 132, and the two side walls 13 opposite to each other in the width direction Y of the box body 10 are respectively a third wall 133 and a fourth wall 134.

[0055] The box body 10 further includes a door panel 14 , which can be disposed on at least one of the first wall 131 , the second wall 132 , the third wall 133 and the fourth wall 134 as required to facilitate entry into the box body 10 .

[0056] It is understandable that in some other embodiments, the shape of the box body 10 may also be a cube or other polyhedron.

[0057] In some embodiments, the accommodating cavity 101 of the box body 10 includes an electrical compartment 102 and a battery compartment 103 arranged along the length direction X of the box body 10. The electrical compartment 102 is used to place a DCDC module and a battery cluster management unit (Cell monitor Unit, CMU) for managing and controlling the battery cluster 31 of the battery module 30, a battery pack control unit (Battery Control Unit, BCU) for pipeline control of the battery pack 311 and other electrical components (not shown in the figure), and the battery compartment 103 is used to place the battery module 30.

[0058] In some embodiments, the battery compartment 103 and the electrical compartment 102 are separated by a partition, thereby reducing interference between the electrical components in the electrical compartment 102 and the battery module 30 .

[0059] It is understandable that in some other embodiments, no partition component may be provided between the battery compartment 103 and the electrical compartment 102 .

[0060] For ease of description, in the two side walls 13 opposite to each other in the length direction X of the box body 10, the side wall 13 close to the electrical compartment 102 is the first wall 131, and the side wall 13 away from the electrical compartment 102 is the second wall 132. Figure 3 The side wall 13 at the middle front side is the third wall 133, located Figure 3 The side wall 13 at the middle rear side is a fourth wall 134 .

[0061] In some embodiments, a door panel 14 is disposed on the first wall 131 to facilitate opening the electrical compartment 102 from the location of the first wall 131 for easy maintenance.

[0062] In some embodiments, a door panel 14 is provided on a portion of the third wall 133 corresponding to the battery compartment 103 to facilitate opening the battery compartment 103 for maintenance.

[0063] Reference Figure 2 and Figure 3 In some embodiments, the battery module 30 includes a plurality of battery clusters 31 .

[0064] In some embodiments, the plurality of battery clusters 31 are arranged in the accommodating cavity 101 along the length direction X of the box body 10, specifically in the battery compartment 103. It is understood that in some other embodiments, the plurality of battery clusters 31 may also be arranged along the width direction Y of the box body 10, and the plurality of battery clusters 31 may also be arranged irregularly in the accommodating cavity 101.

[0065] The multiple battery clusters 31 each include multiple stacked battery packs 311. In some embodiments, the stacking direction of the multiple battery packs 311 is the height direction Z of the box 10, which is also the height direction of the battery packs 311, and the height of the battery pack 311 when it is a rectangular parallelepiped is lower than its width and length. It is understandable that the shape of the battery pack 311 can also be cylindrical or cubic, or other shapes.

[0066] Regularly arranging the multiple battery packs 311 of the multiple battery clusters 31 in the accommodating cavity 101 can effectively increase the number of battery packs 311 in the accommodating cavity 101 or the proportion of the battery packs 311 in the box 10 to improve the energy density of the energy storage device 1.

[0067] The multiple stacked battery packs 311 each include multiple battery cells (not shown in the figure).

[0068] Reference Figure 2 and Figure 3 In some embodiments, the energy storage device 1 further includes a detection component 40 and an air intake line 50 for sampling. The detection component 40 is used to detect the gas inhaled through the air intake line 50 to determine whether the battery pack 311 of the battery module 30 has thermal runaway, fire, explosion, etc.

[0069] In some embodiments, the detection assembly 40 is located in the electrical compartment 102 or the battery compartment 103 , and the air intake line 50 is arranged in the battery compartment 103 and / or the electrical compartment 102 .

[0070] Figure 4 for Figure 3 A schematic structural diagram of the detection component 40 in the energy storage device 1.

[0071] Reference Figure 3 and Figure 4 In some embodiments, the detection assembly 40 includes a smoke detector 41 , a combustible gas detector 42 , an air pump 43 , and an exhaust pipe 44 .

[0072] Specifically, the air intake pipeline 50 includes an air inlet 501 and an air outlet 502 which are connected to each other. The air inlet 501 of the air intake pipeline 50 is used for the inlet of gas, and the air outlet 502 of the air intake pipeline 50 is used for the outflow of gas.

[0073] The air inlet 501 of the air intake pipeline 50 may be one or more.

[0074] The exhaust pipeline 44 includes an air inlet 441 and an air outlet 442 which are connected to each other. The air inlet 441 of the exhaust pipeline 44 is used for the inlet of gas, and the air outlet 442 of the exhaust pipeline 44 is used for the outlet of gas.

[0075] The number of the gas outlets 442 of the exhaust pipe 44 is plural, that is, the number of the gas outlets 442 of the exhaust pipe 44 is at least two.

[0076] In some embodiments, the air outlet 502 of the air intake pipeline 50 is connected to the inlet 431 of the air pump 43, the air inlet 441 of the air exhaust pipeline 44 is connected to the outlet 432 of the air pump 43, the air inlet 501 of the air intake pipeline 50 is located in the accommodating chamber 101, one air outlet of the exhaust pipeline 44 is used to deliver the gas flowing out of one air outlet 442 to the smoke detector 41, and the other air outlet 442 of the exhaust pipeline 44 is used to deliver the gas flowing out of the other air outlet 442 to the combustible gas detector 42. For ease of description, the air outlet 442 of the exhaust pipeline 44 connected to the smoke detector 41 is set as the first air outlet 4421, and the air outlet 442 of the exhaust pipeline 44 connected to the combustible gas detector 42 is set as the second air outlet 4422.

[0077] In some embodiments, one gas outlet 442 of the exhaust pipeline 44 is directly connected to the inlet of the smoke detector 41 , and another gas outlet 442 of the exhaust pipeline 44 is directly connected to the inlet of the combustible gas detector 42 .

[0078] In some embodiments, the smoke detector 41 is located at a gas outlet 442 of the exhaust pipe 44 to receive the gas exhausted from the gas outlet 442 of the exhaust pipe 44. The combustible gas detector 42 is located at another gas outlet 442 of the exhaust pipe 44 to receive the gas exhausted from the another gas outlet 442 of the exhaust pipe 44.

[0079] In this embodiment, when the vacuum pump 43 is working, the gas in the accommodating chamber 101 enters through the air inlet 501 of the air suction pipeline 50, then flows into the inlet 431 of the vacuum pump 43 through the air outlet 502 of the air suction pipeline 50, and flows to the air inlet 441 of the exhaust pipeline 44 through the outlet 432 of the vacuum pump 43, and then flows to the smoke detector 41 through the first air outlet 4421 of the exhaust pipeline 44, and at the same time flows to the combustible gas detector 42 through the second air outlet 4422 of the exhaust pipeline 44. The smoke detector 41 is used to detect the concentration of smoke in the gas flowing in through the first air outlet 4421, so as to determine whether the battery module 30 in the accommodating chamber 101 is burning or exploding. Similarly, the combustible gas detector 42 is used to detect the concentration of combustible gas in the gas flowing in through the second air outlet 4422, so as to determine whether the battery module 30 in the accommodating chamber 101 is burning or exploding.

[0080] In addition, compared to the combustible gas detector 42 that does not use the vacuum pump 43, the combustible gas detector 42 in this embodiment detects the gas in the accommodating cavity 101 by means of vacuum pump 43, which can increase the speed at which the gas in the accommodating cavity 101 flows to the combustible gas detector 42, and can increase the amount of gas interacting with the combustible gas detector 42 per unit time, thereby improving the detection effect and detection accuracy of the combustible gas detector 42.

[0081] Similarly, compared with the smoke detector 41 that does not use the vacuum pump 43, the smoke detector 41 in this embodiment detects the gas in the accommodating cavity 101 by means of vacuum pump 43, which can also improve the detection effect and detection accuracy of the smoke detector 41.

[0082] In addition, since the smoke detector 41 and the combustible gas detector 42 can share the air suction pipeline 50, the number of air suction pipelines can be reduced, and the number of air pumps 43 can be reduced, thereby reducing costs. Moreover, since the number of air suction pipelines is reduced, the difficulty of reasonably arranging the air suction pipelines in the accommodating chamber 101 can be reduced.

[0083] It is understandable that the smoke detector 41 in the embodiment of the present application may be an ionization smoke detector 41 or a photoelectric smoke detector 41, etc., and of course may also be a smoke detector 41 with other working principles.

[0084] The combustible gas detector 42 in the embodiment of the present application can be a semiconductor combustible gas detector 42, a catalytic combustion combustible gas detector 42, an electrochemical combustible gas detector 42, an infrared combustible gas detector 42 or a photoionization combustible gas detector 42, etc., and of course it can also be a combustible gas detector 42 with other working principles.

[0085] In some embodiments, the detection assembly 40 further includes a temperature detector (not shown in the figure), which may be directly placed in the accommodating chamber 101 to detect the temperature in the accommodating chamber 101. Of course, the temperature detector may also be connected to the air outlet 442 of the exhaust pipe 44. Like the smoke detector 41, the gas in the accommodating chamber 101 is pumped to the temperature detector by the air pump 43, and the temperature of the extracted gas is then detected to determine whether the battery module 30 in the accommodating chamber 101 is burning or exploding.

[0086] It is understandable that the detection assembly 40 in the embodiment of the present application may also include more types of detectors.

[0087] Reference Figure 3 and Figure 4In some embodiments, the air intake pipe 50 extends into the battery compartment 103 and the electrical compartment 102 along the length direction X of the housing 10, and the number of the air inlet 501 of the air intake pipe 50 is at least two, one of the air inlet 501 of the air intake pipe 50 is provided at the portion of the air intake pipe 50 located in the battery compartment 103, and the other air inlet 501 is provided at the portion of the air intake pipe 50 located in the electrical compartment 102. In this embodiment, the gas in the battery compartment 103 can be drawn to the smoke detector 41 and the combustible gas detector 42 through the air inlet 501 of the air intake pipe 50 located in the battery compartment 103 to detect whether the battery pack 311 in the battery compartment 103 has thermal runaway, combustion or explosion, and the gas in the electrical compartment 102 can be drawn to the smoke detector 41 and the combustible gas detector 42 through the air intake of the air intake pipe 50 located in the electrical compartment 102 to detect whether the electrical components in the electrical compartment 102 have burned or exploded.

[0088] In order to reduce costs, the energy storage device 1 in the related art usually does not place smoke detectors 41 and combustible gas detectors in the electrical compartment 102 to detect the safety of the electrical compartment 102. In this embodiment, since the smoke detectors 41 and combustible gas detectors are all detected by extracting gas through the suction pump 43 and the suction pipe 50, it is only necessary to extend the suction pipe 50 to the electrical compartment 102 to absorb the gas in the electrical compartment 102 to monitor the safety of the electrical compartment 102. Moreover, since it is only necessary to extend the suction pipe 50 to the electrical compartment 102, the electrical compartment 102 and the battery compartment 103 can share the smoke detectors 41 and combustible gas detectors, and there is no need to add smoke detectors 41 and combustible gas detectors to detect the electrical compartment 102, thereby reducing the number of smoke detectors 41 and combustible gas detectors, and realizing the detection of the safety of the electrical compartment 102 while saving costs.

[0089] Specifically, when the electrical compartment 102 and the battery compartment 103 share the smoke detector 41 and the combustible gas detector, in order to accurately determine whether the combustion or explosion occurs in the battery compartment 103 or the electrical compartment 102, in some embodiments, the vacuum pump 43 can independently extract the gas in the battery compartment 103 or the gas in the electrical compartment 102, so as to determine whether the combustion or explosion occurs in the battery compartment 103 or the electrical compartment 102.

[0090] For example, when no combustion or explosion occurs in the battery compartment 103 and the electrical compartment 102, the gas in the battery compartment 103 and the electrical compartment 102 can be extracted at the same time to improve the detection efficiency. When combustion or explosion is detected in the battery compartment 103 or the electrical compartment 102 through the extracted gas, the gas in the electrical compartment 102 and the gas in the battery compartment 103 can be extracted independently in turn to determine whether combustion or explosion occurs in the battery compartment 103 or the electrical compartment 102.

[0091] In some implementations, the smoke detector 41 and the combustible gas detector 42 are placed in the battery compartment 103 .

[0092] In some implementations, the smoke detector 41 and the combustible gas detector 42 are placed in the electrical compartment 102 .

[0093] In some implementations, the smoke detector 41 is placed in the battery compartment 103 , and the combustible gas detector 42 is placed in the electrical compartment 102 .

[0094] In some embodiments, the smoke detector 41, the combustible gas detector 42, the vacuum pump 43 and the exhaust pipe 44 are integrated into a module to reduce the volume. The volume share when placed in the accommodating cavity 101 can be reduced to increase the volume share of the battery module 30, thereby increasing the energy density of the energy storage device 1.

[0095] Reference Figure 3 and Figure 4 In some embodiments, the air intake pipeline 50 includes a main pipeline 51 and a plurality of sub-pipelines 52 arranged at intervals along the width direction Y of the box body 10, the extension direction of the plurality of sub-pipelines 52 is consistent with the length direction X of the box body 10, and the plurality of sub-pipelines 52 are arranged on the side of the top wall 12 of the box body 10 facing the accommodating cavity 101. It can be understood that the plurality of sub-pipelines 52 can be directly connected to the top wall 12 of the box body 10, or can be indirectly fixed to the top wall 12 of the box body 10, or can be indirectly fixed to the side wall 13 of the box body 10.

[0096] In some embodiments, multiple sub-pipelines 52 are connected to the main pipeline 51, and the main pipeline 51 is provided with an air outlet 502 of the air suction pipeline 50 for connecting to the inlet of the air pump 43, and each sub-pipeline 52 is provided with an air inlet 501 of the air suction pipeline 50. In this embodiment, since multiple sub-pipelines 52 are provided with air inlets, the gas in the accommodating chamber 101 can be absorbed through the multiple sub-pipelines 52. Since the multiple sub-pipelines 52 are arranged at intervals in the width direction Y of the box 10, the multiple air inlets of the air suction pipeline 50 are arranged at intervals in the width direction Y of the box 10, so that the gas at different positions in the width direction of the box 10 can be more evenly absorbed, so as to improve the detection efficiency of the smoke detector 41 and the combustible gas detector.

[0097] In some embodiments, each sub-pipeline 52 is provided with a plurality of air inlets 501 of the air suction pipeline 50 at intervals along its extension direction, so that the gas at different positions in the length direction X of the box body 10 can be evenly absorbed to improve the detection efficiency of the smoke detector 41 and the combustible gas detector.

[0098] In some embodiments, at least one sub-pipeline 52 extends into the battery compartment 103 and the electrical compartment 102 along the length direction X of the box body 10, so as to extract gas from the battery compartment 103 and the electrical compartment 102. It is understandable that all of the multiple sub-pipelines 52 may also extend into the battery compartment 103 and the electrical compartment 102, respectively.

[0099] In some embodiments, the air intake pipeline 50 further includes a branch pipeline 53 connected to a sub-pipeline 52, the branch pipeline 53 extends in a direction from the top wall 12 of the box body 10 toward the bottom wall 11, and an air inlet 501 of the air intake pipeline 50 is provided on the branch pipeline 53. Since the branch pipeline 53 extends in a direction from the top wall 12 of the box body 10 toward the bottom wall 11, the air inlet 501 of the air intake pipeline 50 is arranged at different positions in the height direction Z of the box body 10, so that the gas at different positions in the height direction Z of the box body 10 in the accommodating cavity 101 can be extracted for detection, so as to improve the detection efficiency of the smoke detector 41 and the combustible gas detector.

[0100] In some embodiments, the branch pipeline 53 is provided with a plurality of air inlets 501 of the air suction pipeline 50 at intervals along its extension direction. Since the branch pipeline 53 is provided with a plurality of air inlets 501 of the air suction pipeline 50 at intervals along its extension direction, gas can be extracted at more positions in the height direction Z of the box body 10 to improve the detection efficiency of the smoke detector 41 and the combustible gas detector.

[0101] It is understandable that the branch pipelines 53 may be connected to multiple sub-pipelines 52, or one sub-pipeline 52 may be connected to the branch pipeline 53. The number of branch pipelines 53 connected to each sub-pipeline 52 may be one or more.

[0102] It is understood that in some other embodiments, the extension direction of the sub-pipeline 52 may be non-linear, such as extending in an irregular shape. Similarly, the extension direction of the sub-pipeline 53 may also be non-linear, such as extending in an irregular shape.

[0103] Figure 5A A schematic diagram of the structure of another energy storage device 1 provided in an embodiment of the present application; Figure 5A The fire extinguisher cabinet 20 in the embodiment is located outside the box body 10 and is hung outside the side wall 13 of the box body 10 . Figure 5BA schematic structural diagram of another energy storage device 1 provided in an embodiment of the present application; Figure 5B In the embodiment, the fire cabinet 20 is located outside the box body 10, leaning against the side wall 13 of the box body 10 and standing on the ground; Figure 5C A schematic structural diagram of another energy storage device 1 provided in an embodiment of the present application; Figure 5C The fire extinguisher cabinet 20 in the embodiment stands on the ground and is arranged away from the cabinet body 10 .

[0104] Reference Figure 5A-Figure 5C The energy storage device includes a box body 10 and a fire cabinet 20 located outside the box body 10, wherein the box body 10 can refer to the previous embodiment and will not be described again. In this embodiment, since the fire cabinet 20 is located outside the box body 10, the space of the accommodating cavity 101 of the box body 10 can be released, so that the space occupied by the battery module 30 can be increased, thereby improving the energy density of the energy storage device 1.

[0105] The fire extinguisher cabinet 20 is substantially in the shape of a rectangular parallelepiped and includes a bottom wall 22 , a top wall 21 , and four side walls 23 connecting the bottom wall 22 and the top wall 21 .

[0106] In some other embodiments, the fire extinguisher cabinet 20 may also be in the shape of a cube or other polyhedron.

[0107] In some embodiments, the fire cabinet 20 is integrated with fire fighting components to further release the space of the accommodating cavity 101 of the box body 10 and improve the energy density of the energy storage device 1. The fire fighting components may be one or more of a fire fighting gas cylinder, a fire fighting host, an audible and visual alarm, a deflation indicator light, a water pump, and various buttons or control valves.

[0108] Reference Figure 5A In some embodiments, the fire cabinet 20 is hung on the side wall 13 of the box body 10, and in the height direction Z of the box body 10, the fire cabinet 20 is located between the top wall 12 and the bottom wall 11 of the box body 10. In the height direction Z of the box body 10, the fire cabinet 20 is located between the top wall 12 and the bottom wall 11 of the box body 10. In this embodiment, the fire cabinet 20 is hung on the side wall 13 of the box body 10, and in the height direction Z of the box body 10, the fire cabinet 20 is located between the top wall 12 and the bottom wall 11 of the box body 10, so that there is a gap between the bottom wall 22 of the fire cabinet 20 and the ground, thereby reducing the floor space and concrete foundation cost.

[0109] In some embodiments, specifically, the fire extinguisher cabinet 20 is hung on the second wall 132 of the box body 10. Since the first wall 131 and the third wall 133 need to be provided with a door panel 14, and considering that the fourth wall 134 can be close to the fourth wall 134 of other energy storage devices 1, setting the fire extinguisher cabinet 20 on the second wall 132 will neither affect the installation of other energy storage devices 1 nor affect the opening of the door panel 14 of the energy storage device 1, so that the overall structure of the energy storage device 1 is more reasonable.

[0110] In some other embodiments, the fire extinguisher cabinet 20 may also be arranged at a position corresponding to the third wall 133 and the electrical compartment 102. Placing the fire extinguisher cabinet 20 at a position corresponding to the third wall 133 and the electrical compartment 102 will not affect the installation of other energy storage devices 1, nor will it affect the opening of the door panel 14 of the energy storage device 1, and also makes the overall structure of the energy storage device 1 more reasonable.

[0111] Reference Figure 5B In some embodiments, the fire cabinet 20 is directly fixed on the ground. In order to prevent the fire cabinet 20 from being accidentally touched and shaken, the energy storage device 1 also includes a tripod 60. The tripod 60 is used to stabilize the fire cabinet 20 on the ground, and can also fix the fire cabinet 20 on the ground.

[0112] In some embodiments, a portion 61 of the tripod 60 is fixedly connected to the side wall 23 of the fire cabinet 20, and another portion 62 of the tripod 60 extends in a direction parallel to the bottom wall 22 of the fire cabinet 20, and is flush with the bottom wall 22 of the fire cabinet 20 in the height direction of the fire cabinet 20. The bottom wall 22 of the fire cabinet 20 and the other portion 62 of the tripod 60 are placed on the ground together, thereby improving the stability of the fire cabinet 20 placed on the ground. The other portion 62 of the tripod 60 can also be fixed to the ground by fasteners, thereby further improving the fixing stability of the fire cabinet 20.

[0113] In some embodiments, the side wall 23 of the fire extinguisher cabinet 20 is disposed in contact with the side wall 13 of the box body 10 , for example, the fire extinguisher cabinet 20 is directly placed against the second wall 132 of the box body 10 to increase the stability of the fire extinguisher cabinet.

[0114] In some other implementations, the fire extinguisher cabinet 20 may also be placed against a position of the third wall 133 of the box body 10 corresponding to the electrical compartment 102 .

[0115] same Figure 5A In the embodiment, the fire extinguisher cabinet 20 is hung at a position corresponding to the second wall 132 or the third wall 133 and the electrical compartment 102. In this embodiment, the fire extinguisher cabinet 20 is placed against the position corresponding to the second wall 132 or the third wall 133 and the electrical compartment 102, which will neither affect the installation of other energy storage devices 1 nor affect the opening of the door panel 14 of the energy storage device 1, thereby making the overall structure of the energy storage device 1 more reasonable.

[0116] Reference Figure 5C ,and Figure 5B The difference between the embodiment in is that the fire cabinet 20 in this embodiment is set far away from the box body 10, that is, there is a certain distance between the box body 10 and the fire cabinet 20, so that when the battery module 30 in the box body 10 burns or explodes, it should not affect the normal operation of the fire-fighting components in the fire cabinet 20, so as to improve stability and also improve the operability of the installation of the energy storage device 1, and install the fire cabinet 20 in a position that will not affect the installation of other energy storage devices 1.

[0117] Reference Figure 5A-Figure 5C In some embodiments, the detection component 40 is located outside the box 10, that is, the smoke detector 41, the combustible gas detector 42, the exhaust pipe 44 and the vacuum pump 43 are all located outside the box 10, and the part of the suction pipe 50 with the air outlet 502 extends from the accommodating cavity 101 to the outside of the box 10 and is connected to the inlet 431 of the vacuum pump 43. In this embodiment, since the smoke detector 41, the combustible gas detector 42, the exhaust pipe 44 and the vacuum pump 43 are all located outside the box body 10, the power and volume of the vacuum pump 43 can be designed to be larger, so that the gas at multiple positions in the accommodating chamber 101 can be extracted to the smoke detector 41 and the combustible gas detector 42 by one vacuum pump 43. Therefore, there is no need to arrange multiple smoke detectors 41 and multiple combustible gas detectors 42 in the accommodating chamber 101. Instead, a small number of smoke detectors 41 and combustible gas detectors 42 (for example, one smoke detector 41 and one combustible gas detector 42) can be used to detect multiple positions in the accommodating chamber 101, thereby effectively reducing the number of smoke detectors 41 and combustible gas detectors 42 and reducing costs.

[0118] In addition, since the smoke detector 41, the combustible gas detector 42, the exhaust pipe 44 and the vacuum pump 43 are all located outside the box 10, the smoke detector 41, the combustible gas detector 42, the exhaust pipe 44 and the vacuum pump 43 can release the space of the accommodating cavity 101, thereby increasing the proportion of the battery module 30 in the accommodating cavity 101 and improving the energy density of the energy storage device 1.

[0119] In some embodiments, the smoke detector 41 is a non-explosion-proof smoke detector. Since the smoke detector 41 is located outside the housing 10, the smoke detector 41 is a non-explosion-proof smoke detector, which can also prevent the explosion of the smoke detector 41 from damaging the battery module 30 or electrical components in the housing 10. In addition, the cost of non-explosion-proof smoke detectors is lower.

[0120] In some embodiments, the combustible gas detector 42 is a non-explosion-proof combustible gas detector. Since the combustible gas detector 42 is located outside the box 10, the combustible gas detector 42 is a non-explosion-proof combustible gas detector, which can also prevent the combustible gas detector 42 from exploding and causing damage to the battery module 30 or electrical components in the box 10. In addition, the cost of the non-explosion-proof combustible gas detector is lower.

[0121] Reference Figure 5A-Figure 5C In some embodiments, the detection assembly 40 is disposed in the fire cabinet 20, which not only protects the detection assembly 40 from wind and rain, but also improves the high degree of integration of fire protection components for subsequent maintenance.

[0122] Specifically, the smoke detector 41 , the combustible gas detector 42 , the exhaust pipe 44 , the vacuum pump 43 and the like are all located in the fire cabinet 20 .

[0123] When Figure 5C As shown, when the fire cabinet 20 is set apart from the box 10, the part of the air suction pipe 50 between the box 10 and the fire cabinet 20 is pre-buried underground. Since the part of the air suction pipe 50 between the box 10 and the fire cabinet 20 is pre-buried underground, the reliability can be increased to prevent accidental damage.

[0124] It should be noted that Figure 5A-Figure 5C The first wall 131, the second wall 132, the third wall 133, the fourth wall 134, the electrical compartment 102, the battery module 30, the door panel 14, the detection assembly 40, the smoke detector 41, the combustible gas detector 42, the intake pipe 50, the exhaust pipe 44 and the vacuum pump 43 etc. improved in the embodiments can all be referred to the previous embodiments and will not be repeated here.

[0125] Figure 6 A schematic structural diagram of another energy storage device 1 provided in an embodiment of the present application; Figure 6 The energy storage device 1 and Figure 3 The biggest difference between the energy storage device 1 in FIG. 1 and FIG. 2 is that the structure of the air intake pipeline 50 and the arrangement thereof in the accommodating chamber 101 are different.

[0126] Reference Figure 6The energy storage device 1 further includes a plurality of flues 70 extending in the direction of stacking of the plurality of battery packs 311. The arrangement direction of the plurality of flues 70 is the same as the arrangement direction of the plurality of battery clusters 31. The pressure relief ports 3111 of the plurality of battery packs 311 of each battery cluster 31 are connected to a flue 70. In this embodiment, since a plurality of flues 70 are provided in the housing 10, each flue 70 corresponds to a battery cluster 31, that is, the pressure relief ports 3111 of the plurality of battery packs 311 of a battery cluster 31 are all located in the same flue 70. Therefore, after the battery packs 311 in a battery cluster 31 are depressurized through the pressure relief ports, the gas will enter the flue 70 and then be discharged through the flue 70, so as to avoid the pressure increase in the accommodating chamber 101, and reduce the probability of combustion and explosion of the energy storage device 1.

[0127] In some embodiments, the air intake pipeline 50 further includes a plurality of branch pipelines 53 connected to another sub-pipeline 52 among the plurality of sub-pipelines 52, the plurality of branch pipelines 53 are arranged at intervals along the extension direction of the other sub-pipeline 52, and the extension direction of the plurality of branch pipelines 53 is from the top wall toward the bottom wall of the box body 10, the plurality of branch pipelines 53 are provided with air inlets 501 of the air intake pipeline 50, and the plurality of branch pipelines 53 are arranged in a plurality of flues 70 in a one-to-one correspondence. In this embodiment, since each flue 70 corresponds to a battery cluster 31, that is, each flue 70 can collect the gas discharged when the plurality of battery packs 311 of a battery cluster 31 are depressurized, and each flue 70 is provided with a branch pipeline 53, and the branch pipeline 53 is provided with an air inlet 501 of the air intake pipeline 50, the states of the plurality of battery packs 311 of a battery cluster 31 can be detected simultaneously through one air intake pipeline 50, which can improve the detection efficiency and the detection accuracy.

[0128] Specifically, in order to accurately determine which battery cluster 31 is experiencing thermal runaway, combustion or explosion, the gas in different flues 70 can be extracted separately and independently in sequence by the vacuum pump 43, so as to detect which flue 70 corresponds to the battery cluster 31 experiencing thermal runaway, combustion or explosion through the smoke detector 41 and the combustible gas detector 42. It is understandable that under normal working conditions, the gas in multiple flues 70 can be extracted simultaneously by the vacuum pump 43. When a battery cluster 31 is found to be abnormal (thermal runaway, combustion or explosion), the gas in different flues 70 can be extracted separately and independently in sequence to accurately determine which battery cluster 31 is experiencing thermal runaway, combustion or explosion.

[0129] It should be noted that Figure 6The multiple sub-pipelines 52, multiple battery clusters 31, multiple battery packs 311, the air inlet 501 of the air intake pipeline 50, the battery module 30, the detection assembly 40, the smoke detector 41, the combustible gas detector 42, the air intake pipeline 50 and the vacuum pump 43 improved in the embodiments can all refer to the previous embodiments and will not be repeated here.

[0130] Figure 7 A schematic structural diagram of another energy storage device 1 provided in an embodiment of the present application; Figure 7 The energy storage device 1 and Figure 3 The biggest difference between the energy storage device 1 in the embodiment is the structure of the air intake pipe 50 and the arrangement method in the accommodating chamber 101. Figure 6 The difference between the energy storage device 1 in the embodiment is that no flue 70 is provided and the structure of the air intake pipeline 50 is different.

[0131] Reference Figure 7 In this embodiment, the air intake pipeline 50 further includes a plurality of branch pipelines 53 connected to another sub-pipeline 52 among the plurality of sub-pipelines 52. The plurality of branch pipelines 53 are arranged at intervals along the extension direction of the other sub-pipeline 52, and the extension direction of the plurality of branch pipelines 53 is from the top wall toward the bottom wall of the box body 10. The plurality of branch pipelines 53 are provided with a plurality of spaced air inlets 501 of the air intake pipeline 50 along the extension direction of the branch pipelines 53. The plurality of air inlets on each branch pipeline 53 are arranged one by one beside the pressure relief ports 3111 of the plurality of battery packs 311 of each battery cluster 31. In this embodiment, although it is not as Figure 6 In the embodiment, a flue 70 is provided, but since the multiple air inlets on each branch pipe 53 are arranged one by one beside the pressure relief ports 3111 of the multiple battery packs 311 of each battery cluster 31, the multiple battery packs 311 of each battery cluster 31 correspond to the positions of the air inlets 501 of the multiple air intake pipes 50 on a branch pipe 53, so that each branch pipe 53 can detect the status of the multiple battery packs 311 of a battery cluster 31, and since there is an air inlet 501 of the air intake pipe 50 next to the pressure relief port 3111 of each battery pack 311, the gas of each battery pack 311 during pressure relief can be extracted more accurately and timely, and the status of the battery pack 311 can be obtained more accurately and timely.

[0132] In addition, in this embodiment, it is also possible to accurately obtain which battery pack 311 has an abnormality (thermal runaway or combustion or explosion) so as to carry out precise firefighting. Specifically, the gas next to each battery pack 311 can be independently extracted in sequence by the air pump 43 to determine which battery pack 311 has an abnormality. For example, under normal working conditions, the gas next to multiple battery packs 311 of multiple battery clusters 31 can be extracted by the air pump 43. When the smoke detector 41 and the combustible gas detector 42 are found to have an abnormality, the gas next to the multiple battery packs 311 corresponding to each battery cluster 31 can be independently extracted in sequence by the air pump 43. When it is found that the battery pack 311 in a certain battery cluster 31 has an abnormality, the gas next to the multiple battery packs 311 of the battery cluster 31 with the problem can be independently extracted in sequence by the air pump 43 to determine which battery pack 311 has an abnormality.

[0133] It should be noted that Figure 7 The multiple sub-pipelines 52, multiple battery clusters 31, multiple battery packs 311, the air inlet 501 of the air intake pipeline 50, the battery module 30, the detection assembly 40, the smoke detector 41, the combustible gas detector 42, the air intake pipeline 50 and the vacuum pump 43 improved in the embodiments can all refer to the previous embodiments and will not be repeated here.

[0134] Figure 8 A schematic structural diagram of another energy storage device 1 provided in an embodiment of the present application; Figure 8 The energy storage device 1 and Figure 3 The biggest difference between the energy storage device 1 in the embodiment is the structure of the air intake pipe 50 and the arrangement method in the accommodating chamber 101. Figure 7 The difference between the energy storage device 1 in the embodiment is that the air inlet 501 of the air intake pipeline 50 on the branch pipeline 53 is directly connected to the battery pack 311; Fig. 9 for Figure 8 A local enlarged schematic diagram of point A in the middle.

[0135] Reference Figure 8 and Fig. 9The multiple battery packs 311 of the multiple battery clusters 31 of the energy storage device 1 all include air intake ports 3112, and the air intake pipeline 50 also includes multiple branch pipelines 53 connected to another sub-pipeline 52 among the multiple sub-pipelines 52. The multiple branch pipelines 53 are arranged at intervals along the extension direction of the other sub-pipeline 52, and the extension direction of the multiple branch pipelines 53 is from the top wall of the box body 10 toward the bottom wall. The multiple branch pipelines 53 are provided with multiple spaced air inlets 501 of the air intake pipeline 50 along the extension direction of the branch pipelines 53, and the multiple air inlets on each branch pipeline 53 are connected to the air intake ports 3112 of the multiple battery packs 311 of each battery cluster 31 in a one-to-one correspondence. In the present embodiment, since the multiple battery packs 311 of each battery cluster 31 in the multiple battery clusters 31 all include a gas collection port 3112, and the multiple air inlets on each branch pipeline 53 are connected one-to-one to the gas collection ports 3112 of the multiple battery packs 311 of each battery cluster 31, the multiple battery packs 311 of each battery cluster 31 are connected to the air inlets 501 of the multiple air intake pipelines 50 on a branch pipeline 53, so that each branch pipeline 53 can detect the status of the multiple battery packs 311 of a battery cluster 31, and since the gas collection port 3112 of each battery pack 311 is connected to the air inlet 501 of the air intake pipeline 50, the gas in each battery pack 311 can be extracted more accurately and timely, and the status of the battery pack 311 can be obtained more accurately and timely. Since the status in the battery pack 311 can be obtained in time, it can prevent the battery pack 311 from thermal runaway.

[0136] Similarly, in this embodiment, it is also possible to accurately determine which battery pack 311 has an abnormality (thermal runaway, combustion, or explosion) so as to carry out precise firefighting. Figure 7 The method of obtaining which battery pack 311 has an abnormality is the same as that of the embodiment in the above, and will not be repeated here.

[0137] It should be noted that Figure 8 and Fig. 9 The multiple sub-pipelines 52, multiple battery clusters 31, multiple battery packs 311, the air inlet 501 of the air intake pipeline 50, the battery module 30 and the air intake pipeline 50 improved in the embodiments can all refer to the previous embodiments and will not be repeated here.

[0138] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An energy storage device with fire-fighting function, characterized in that: The energy storage device comprises a box and a battery module, wherein the battery module is arranged in the box; The energy storage device also includes a smoke detector, a combustible gas detector, an air intake pipeline, an exhaust pipeline and an air pump. The air intake pipeline includes a connected air inlet and an air outlet. The exhaust pipeline includes an air inlet and at least two air outlets connected to the air inlet of the exhaust pipeline. The air inlet of the air intake pipeline is arranged in the box body. The air pump is connected between the air outlet of the air intake pipeline and the air inlet of the exhaust pipeline. One air outlet of the exhaust pipeline is used to transport the gas flowing out of the one air outlet to the smoke detector, and the other air outlet of the exhaust pipeline is used to transport the gas flowing out of the other air outlet to the combustible gas detector.

2. The energy storage device according to claim 1, characterized in that: The smoke detector, the combustible gas detector, the exhaust pipe and the vacuum pump are all located outside the box. The suction pipe extends from inside the box to outside the box. The air outlet of the suction pipe is connected to the inlet of the vacuum pump outside the box.

3. The energy storage device according to claim 1 or 2, characterized in that: The energy storage device also includes a fire cabinet, the smoke detector, the combustible gas detector, the exhaust pipeline and the vacuum pump are all located in the fire cabinet, the fire cabinet is located outside the box, the suction pipeline extends from inside the box to outside the box and extends into the fire cabinet, and the air outlet of the suction pipeline is connected to the inlet of the vacuum pump in the fire cabinet.

4. The energy storage device according to any one of claims 1 to 3, characterized in that: The box body includes an electrical compartment and a battery compartment arranged along the length direction of the box body, the battery module is arranged in the battery compartment, the energy storage device also includes electrical components arranged in the battery compartment, the intake duct extends into the battery compartment and the electrical compartment respectively along the length direction of the box body, the intake duct has at least two air inlets, one air inlet of the intake duct is arranged at the part of the intake duct located in the battery compartment, and the other air inlet of the intake duct is arranged at the part of the intake duct located in the electrical compartment.

5. The energy storage device according to claim 4, characterized in that: The air intake pipeline includes a main pipeline and a plurality of sub-pipelines arranged at intervals along the width direction of the box body, the extension direction of the plurality of sub-pipelines is consistent with or at an angle to the length direction of the box body, the plurality of sub-pipelines are arranged on the side of the top wall of the box body facing the inner cavity of the box body, the plurality of sub-pipelines are all connected to the main pipeline, the main pipeline is provided with an air outlet of the air intake pipeline, the air outlet of the main pipeline is connected to the inlet of the air pump, and each of the sub-pipelines is provided with an air inlet of the air intake pipeline.

6. The energy storage device according to claim 5, characterized in that: The air intake pipeline further includes a branch pipeline connected to the one sub-pipeline, the extension direction of the branch pipeline is the height direction of the box, and the air inlet of the air intake pipeline is located in the branch pipeline.

7. The energy storage device according to claim 5 or 6, characterized in that: The battery module includes a plurality of battery clusters arranged along the length direction of the box, each of the plurality of battery clusters includes a plurality of stacked battery packs, the energy storage device also includes a plurality of flues extending in the stacking direction of the plurality of battery packs, the arrangement direction of the plurality of flues is the same as the arrangement direction of the plurality of battery clusters, and the pressure relief ports of the plurality of battery packs of each battery cluster are connected to one of the flues; The air intake pipeline also includes a plurality of branch pipelines connected to the other sub-pipeline, the plurality of branch pipelines are arranged at intervals along the extension direction of the other sub-pipeline, and the extension direction of the plurality of branch pipelines is the height direction of the box body, the plurality of branch pipelines are each provided with an air inlet of the air intake pipeline, and the plurality of branch pipelines are arranged one by one in the plurality of flues.

8. The energy storage device according to claim 5 or 6, characterized in that: The battery module includes a plurality of battery clusters arranged along the length direction of the box body, and each of the plurality of battery clusters includes a plurality of stacked battery packs; The air intake pipeline also includes a plurality of branch pipelines connected to the other sub-pipeline, the plurality of branch pipelines are arranged at intervals along the extension direction of the other sub-pipeline, and the extension direction of the plurality of branch pipelines is from the top wall toward the bottom wall of the box body, and the plurality of branch pipelines are provided with a plurality of spaced air inlets of the air intake pipeline along the extension direction of the branch pipelines, and the plurality of air inlets on each of the branch pipelines are arranged one by one next to the pressure relief ports of the plurality of battery packs of each battery cluster.

9. The energy storage device according to claim 5 or 6, characterized in that: The battery module includes a plurality of battery clusters arranged along the length direction of the box body, each of the plurality of battery clusters includes a plurality of stacked battery packs, and each of the plurality of battery packs of the plurality of battery clusters includes a gas collection port; The air intake pipeline also includes a plurality of branch pipelines connected to the other sub-pipeline, and the plurality of branch pipelines are arranged at intervals along the extension direction of the other sub-pipeline, and the extension direction of the plurality of branch pipelines is from the top wall of the box body toward the bottom wall, and the plurality of branch pipelines are provided with a plurality of spaced air inlets of the air intake pipeline along the extension direction of the branch pipelines, and the plurality of air inlets on each of the branch pipelines are connected to the air intake ports of the plurality of battery packs of each battery cluster one by one.

10. The energy storage device according to claim 3, characterized in that: The fire cabinet is hung on the side wall of the box body. In the height direction of the box body, the fire cabinet is located between the top wall and the bottom wall of the box body. Part of the air suction pipeline passes through the side wall of the box body on which the fire cabinet is hung, the side wall of the fire cabinet in contact with the box body, and enters the fire cabinet. The air outlet of the air suction pipeline is connected to the inlet of the vacuum pump in the fire cabinet.

11. The energy storage device according to claim 10, characterized in that: A tripod is provided on the side wall of the fire cabinet, and the energy storage device also includes a tripod, a part of the tripod is fixedly connected to the side wall of the fire cabinet, and the other part of the tripod extends in a direction parallel to the bottom wall of the fire cabinet and is flush with the bottom wall of the fire cabinet in the height direction of the fire cabinet, the bottom wall of the fire cabinet and the other part of the tripod are used to be placed on the ground together, the fire cabinet and the box body are spaced apart, and the part of the air intake pipeline located between the box body and the fire cabinet is pre-buried underground.

12. An energy storage system, characterized in that: It comprises a power converter and an energy storage device as described in any one of claims 1 to 11, wherein the power converter is connected to the energy storage device and is used to perform power conversion on the current input to or output from the energy storage device.

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