Battery shell, battery assembly, energy storage equipment and energy storage system

Abstract

The utility model provides a battery shell, a battery assembly, an energy storage device and an energy storage system.The battery shell comprises an outer shell, a battery pack, a battery pack and an energy storage system, and the outer shell defines a containing cavity suitable for containing a battery cell; and the atomizing nozzle is arranged in the accommodating cavity and is used for spraying a fire extinguishing agent to the battery cell. According to the battery shell disclosed by the utility model, the atomization nozzle is arranged in the shell, independent spraying fire extinguishing can be carried out on the interior of the single battery shell, point-to-point accurate fire extinguishing control is realized, meanwhile, the atomization nozzle is used for spraying a fire extinguishing agent, so that the fire extinguishing agent can be gasified and quickly cooled, and can be quickly diffused into the whole battery shell to realize quick fire extinguishing; the fire extinguishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment protection, and more specifically, to a battery housing, a battery assembly, an energy storage device, and an energy storage system. Background Art

[0002] In the related art, a battery assembly may include, but is not limited to, a battery pack and an electrical device using the battery pack. Thermal runaway of the battery assembly is a serious safety problem, and a large amount of heat will be released during its thermal runaway process, which may seriously cause fires and explosions. In the prior art, a fire protection system is usually arranged outside the battery assembly to control the thermal runaway of the battery assembly by spraying or immersion. However, it is difficult for the external fire protection system to accurately extinguish the fire, and the fire extinguishing efficiency is low. Summary of the Utility Model

[0003] The first object of this application is to provide a new technical solution for a battery housing, which can at least solve one of the problems of inaccurate fire extinguishing and low fire extinguishing efficiency in the prior art.

[0004] The second object of this application is to provide a battery assembly including the above battery housing.

[0005] The third object of this application is to provide an energy storage device including the above battery assembly.

[0006] The fourth object of this application is to provide an energy storage system including the above energy storage device.

[0007] According to the first aspect of this application, a battery housing is provided, including: an outer shell, the outer shell defining a receiving cavity adapted to receive an electric core; an atomizing nozzle disposed in the receiving cavity for spraying a fire extinguishing agent onto the electric core.

[0008] Optionally, the outer shell includes a bottom plate, side plates, and a top plate, and the atomizing nozzle is disposed on the side plates and / or the bottom plate.

[0009] Optionally, the battery housing further includes: a connector, one end of the connector passing through the outer surface of the outer shell to form a liquid inlet, and the other end of the connector having a liquid outlet, and the atomizing nozzle is disposed at the liquid outlet.

[0010] Optionally, the battery housing further includes: a sensing member located inside the outer shell and blocking the liquid outlet, and the sensing member can be broken or melted under a preset temperature or a preset pressure.

[0011] Optionally, the atomizing nozzle includes: a connecting pipe, one end of the connecting pipe communicating with the connector, and at least one hollowed-out area provided on the circumferential direction of the connecting pipe; a water mist radiation plate disposed at the other end of the connecting pipe.

[0012] Optionally, the diameter of the water mist radiation plate is d1, and the diameter of the liquid outlet is d2, where 12*d2 ≤ d1 ≤ 15*d2.

[0013] Optionally, the water mist radiation plate is petal-shaped.

[0014] Optionally, the housing is provided with an electrical connector and a communication connector, and the atomizing nozzles are respectively lower than the electrical connector and the communication connector.

[0015] Optionally, the housing is provided with a pressure relief structure for guiding the fire extinguishing agent in the housing to flow out of the housing.

[0016] Optionally, the pressure relief structure is higher than the atomizing nozzles.

[0017] Optionally, the pressure relief structure includes a diversion nozzle. One end of the diversion nozzle is communicated with the accommodation cavity, and the other end of the diversion nozzle extends towards the outside of the housing for guiding the fire extinguishing agent flow away from the outer surface of the housing.

[0018] Optionally, the housing is provided with an electrical connector and a communication connector. In the horizontal direction, the length by which the diversion nozzle extends out of the housing is respectively greater than the length by which the electrical connector extends out of the housing and the length by which the communication connector extends out of the housing.

[0019] According to the second aspect of the present application, there is provided a battery assembly, characterized by comprising: a battery housing, which is the battery housing as described in the first aspect; and an electric core, which is disposed in the accommodation cavity.

[0020] According to the third aspect of the present application, there is provided an energy storage device, characterized by comprising: the battery assembly as described in the second aspect.

[0021] Optionally, the energy storage device further comprises: a cabinet body, which defines an accommodation space, and a plurality of the battery assemblies are stacked in the accommodation space.

[0022] According to the fourth aspect of the present application, there is provided an energy storage system, characterized by comprising: an energy storage device, which is the energy storage device as described in the third aspect; and a fire pipe assembly, which is communicated with the atomizing nozzles for transporting the fire extinguishing agent.

[0023] Optionally, the fire pipe assembly includes: a main pipe, which is communicated with a water source; and at least one branch pipe, each of which is communicated with the main pipe and extends in the vertical direction, and each branch pipe is communicated with at least one of the atomizing nozzles.

[0024] Optionally, a joint is provided between the atomizing nozzle and the branch pipe. The joint has a liquid outlet, and the atomizing nozzle is arranged at the liquid outlet. The diameter of the liquid outlet is smaller than the inner diameter of the branch pipe.

[0025] Optionally, the energy storage system further includes: a current collecting plate, which is spaced apart from the battery housing in the horizontal direction and is used to guide the fire extinguishing agent overflowing from the battery housing to the bottom of the energy storage device.

[0026] Optionally, in the direction from top to bottom, the current collecting plate is inclined away from the battery housing.

[0027] Optionally, a hydrophobic coating is provided on the side of the current collecting plate facing the battery housing.

[0028] Optionally, the current collecting plate is made of a soft material.

[0029] Optionally, the energy storage system further includes: a current collecting structure, which is spaced apart from the outer shell in the horizontal direction. The current collecting structure has a plurality of current collecting channels arranged in the vertical direction. In the direction from top to bottom, each current collecting channel extends away from the battery housing.

[0030] According to the battery housing of the present invention, an atomizing nozzle is provided inside the outer shell, which can independently spray fire extinguishing on the inside of a single battery housing, realizing point-to-point precise fire extinguishing control. At the same time, using the atomizing nozzle to spray the fire extinguishing agent can not only quickly cool down by gasifying the fire extinguishing agent, but also quickly spread to the entire battery housing to achieve rapid fire extinguishing, improving the fire extinguishing efficiency.

[0031] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings incorporated in the specification and forming a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0033] Figure 1 is a front view schematic diagram of an energy storage system according to an embodiment provided by the present invention;

[0034] Figure 2 is a top view schematic diagram of the connection between a battery assembly and a branch pipe according to an embodiment provided by the present invention;

[0035] Figure 3 is a schematic diagram of an atomizing nozzle, a joint and a sensing member in a battery housing according to an embodiment provided by the present invention;

[0036] Figure 4 It is a schematic diagram showing the arrangement of the current collector plate in the energy storage system according to an embodiment provided by the present utility model;

[0037] Figure 5 It is a schematic diagram showing the arrangement of the current collector plate in the energy storage system according to another embodiment provided by the present utility model;

[0038] Figure 6 It is a schematic diagram showing the arrangement of the current collection structure in the energy storage system according to still another embodiment provided by the present utility model.

[0039] Reference numerals

[0040] 1, energy storage system; 2, energy storage device; 3, cabinet; 3a, cabinet door; 4, battery housing; 4a, bottom plate; 4b, side plate; 4c, top plate; 10, fire pipe assembly; 11, main pipe; 12, branch pipe; 13, joint; 14, liquid outlet; 15, liquid inlet; 20, atomizing nozzle; 21, connecting pipe; 22, water mist radiation plate; 221, deflector; 30, pressure relief structure; 40, sensing member; 50, current collector plate; 60, current collection structure; 61, current collection channel. Detailed embodiments

[0041] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present utility model.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended as a limitation on the present utility model or its application or use.

[0043] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification.

[0044] In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0045] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] Next, the battery housing 4 according to the embodiment of the present utility model will be specifically described with reference to the accompanying drawings first.

[0047] As Figures 1 to 6As shown in the figure, the battery housing 4 according to the embodiment of the present invention includes: an outer shell and an atomizing nozzle 20.

[0048] Specifically, the outer shell defines a receiving cavity adapted to receive the battery cell, and the atomizing nozzle 20 is disposed in the receiving cavity for spraying a fire extinguishing agent onto the battery cell.

[0049] In other words, the battery housing 4 according to the embodiment of the present invention is mainly composed of an outer shell and an atomizing nozzle 20. A receiving cavity may be provided inside the battery housing 4, and the receiving cavity may be used to receive the battery cell.

[0050] The atomizing nozzle 20 and the outer shell may be directly connected or indirectly connected, which is not limited herein. Since the battery cell has a risk of thermal runaway, in severe cases, it may cause a fire. The atomizing nozzle 20 in the receiving cavity can spray the fire extinguishing agent into water mist and absorb the heat inside the battery housing 4. Since the water mist spreads over a larger area more quickly and the water mist disperses more quickly and is more likely to absorb the heat during a fire and evaporate into water vapor, it is more beneficial to cool down and suppress the fire during a fire. Therefore, spraying water mist into the battery housing 4 where a fire occurs is beneficial to controlling the temperature inside the battery housing 4 and quickly and efficiently extinguishing the fire in the faulty battery housing 4.

[0051] In addition, after the fire extinguishing agent is atomized, it belongs to a gas-liquid mixed phase, and the main residue after extinguishing the fire is vapor. The residue during fire extinguishing only exists inside the battery housing 4 where a fire occurs, and there will be no large-scale leakage of the fire extinguishing agent inside the energy storage device 2. Point-to-point fire extinguishing with controllable fire extinguishing orientation is achieved, and there is no impact on other battery housings 4 after fire extinguishing. The maintenance cost after fire extinguishing is lower and the loss is smaller; at the same time, higher fire extinguishing reliability of the energy storage fire extinguishing system is achieved.

[0052] Thus, for the battery housing 4 according to the embodiment of the present invention, by providing an atomizing nozzle 40 inside the outer shell, independent spray fire extinguishing of the interior of a single battery housing 4 can be achieved, realizing point-to-point precise fire extinguishing control. At the same time, by using the atomizing nozzle 20 to spray the fire extinguishing agent, not only can the rapid cooling be achieved by the gasification of the fire extinguishing agent, but also the fire extinguishing agent can quickly spread throughout the battery housing 4 to achieve rapid fire extinguishing, improving the fire extinguishing efficiency.

[0053] In some alternative embodiments, the atomizing nozzle 20 may include a small-hole atomizer.

[0054] According to some other embodiments of the present invention, the outer shell includes a bottom plate 4a, side plates 4b, and a top plate 4c, and the atomizing nozzle 20 is disposed on the side plate 4b or the bottom plate 4a.

[0055] Specifically, the outer shell may mainly be composed of a bottom plate 4a, side plates 4b, and a top plate 4c. For example, for a square-shell battery housing 4, the housing may mainly be surrounded by one bottom plate 4a, four side plates 4b, and one top plate 4c.

[0056] The atomizing nozzle 20 is arranged on the side plate 4b or the bottom plate 4a, which can make the atomizing nozzle 20 in a lower position inside the battery housing 4. Thus, the fire extinguishing agent ejected by the atomizing nozzle 20 will spread upward from bottom to top after being heated and vaporized inside the battery housing 4, so that all parts of the battery housing 4 can be effectively cooled, which is beneficial to improving the fire extinguishing efficiency.

[0057] According to an embodiment of the present invention, the battery housing 4 further includes a connector 13. One end of the connector 13 penetrates through the outer surface of the housing and forms a liquid inlet 15, and the other end of the connector 13 has a liquid outlet 14, and the atomizing nozzle 20 is arranged at the liquid outlet 14.

[0058] Specifically, the atomizing nozzle 20 inside the housing can be communicated with the external fire pipe assembly 10 through the connector 13, and the fire extinguishing agent can flow to the atomizing nozzle 20 through the connector 13. An opening communicating with the accommodation cavity can be provided on the surface of the housing. The connector has at least two ports, one of which passes through the opening on the housing and forms a liquid inlet 15, and the other port is located inside the accommodation cavity and is communicated with the atomizing nozzle 20.

[0059] In this embodiment, the atomizing nozzle 20 is communicated with the external fire pipe assembly 10 by using the connector 13, which not only realizes the supply of the fire extinguishing agent, but also provides an installation carrier for the atomizing nozzle 20, and has the advantages of simple structure and convenient pipeline connection.

[0060] In some specific embodiments of the present invention, the energy storage system 1 further includes a plurality of sensing members 40. Each sensing member 40 is located inside the housing and blocks the liquid outlet 14, and can be broken or melted under a preset temperature or a preset pressure.

[0061] Specifically, at least one sensing member 40 can be provided at the liquid outlet 14. Preferably, a sensing member 40 can be provided at each liquid outlet 14.

[0062] When a fire does not occur, the sensing member 40 can block the liquid outlet 14 to prevent the fire extinguishing agent from flowing to the atomizing nozzle 20, thereby preventing the fire extinguishing agent from flowing into the interior of the battery housing 4.

[0063] The sensing member 40 can include, but is not limited to, a temperature sensing member and a pressure sensing member. The temperature sensing member can be broken or melted at a preset temperature, and the pressure sensing member can be broken at a preset pressure. That is to say, under a preset temperature or a preset pressure, the sensing member 40 can release the blockage of the liquid outlet 14, so that the fire extinguishing agent can be ejected through the atomizing nozzle 20.

[0064] For example, the sensing component 40 can be made of a heat-sensitive material. When the temperature inside the battery shell 4 reaches a preset temperature, the sensing component 40 can melt and deform to open the liquid outlet 14. At this time, the pressure inside the battery shell 4 is relatively high, and the fire extinguishing agent flowing from the liquid outlet 14 to the atomizing nozzle 20 can be quickly atomized, that is, it undergoes a process of first accumulating pressure in the battery shell 4 and then atomizing and releasing it all at once, thereby realizing pressurized atomization, which is beneficial to improving the fire extinguishing effect.

[0065] In some other embodiments, the sensing element 40 may be made of glass, and the sensing element 40 made of glass may break at a preset temperature or a preset pressure.

[0066] In this embodiment, a sensor 40 is provided at the liquid outlet 14, which can control the on and off of the liquid outlet 14 according to the change in the temperature or pressure state, thereby realizing physical control of fire extinguishing, eliminating the solenoid valve in the traditional technology, and directly sensing whether a fire occurs in the battery housing 4 through the terminal sensor 40 without any signal control, thereby eliminating the danger of fire extinguishing due to false alarms of the sensor, and also eliminating the risk of failure to extinguish the fire in time due to the burning of the wiring harness between the solenoid valve and the controller caused by the fire, thereby greatly improving the reliability of the battery housing 4 and the battery assembly, energy storage device 2 and energy storage system 4 including the battery housing.

[0067] According to some optional embodiments of the present invention, the atomizing nozzle 20 includes a connecting pipe 21 and a water mist radiation plate 22. One end of the connecting pipe 21 is connected to the joint 13. The connecting pipe 21 is provided with at least one hollow area in its circumference. The water mist radiation plate 22 is provided at the other end of the connecting pipe 21.

[0068] Specifically, the connecting pipe 21 can be connected between the joint 13 and the water mist radiation plate 22, and one or more hollow areas can be provided on the connecting pipe 21, and the hollow areas can penetrate the inner and outer wall surfaces of the connecting pipe 21. The fire extinguishing agent can flow to the water mist radiation plate 22 through the hollow areas, and the high-speed fire extinguishing agent can quickly form fire water mist when hitting the water mist radiation plate 22 to start extinguishing the fire.

[0069] According to some other embodiments of the present invention, the diameter of the water mist radiation plate 22 is d1, the diameter of the liquid outlet 14 is d2, and 12*d2≤d1≤15*d2.

[0070] like Figure 3 As shown, the caliber of the liquid outlet 14 is the inner diameter of the end of the connector 13. The inner diameter of the end of the connector 13 can be d2. Setting d1≥12*d2 is beneficial to improving the atomization effect to ensure a good fire extinguishing effect. Setting d1≤15*d2 is beneficial to controlling the size of the water mist radiation plate 22 and reducing the space occupied by the fire extinguishing nozzle in the battery housing 4.

[0071] In some specific embodiments of the present utility model, the water mist radiation plate 22 is in a petal shape, as Figure 3 shown. The petal-shaped water mist radiation plate 22 enables the fire extinguishing agent to be quickly atomized after a high-speed impact, which is beneficial to enhancing the atomization effect.

[0072] Specifically, the water mist radiation plate 22 includes a plurality of flow guiding plates 221. The plurality of flow guiding plates 221 are arranged at intervals along the circumferential direction of the connecting pipe 21. One end of each flow guiding plate 221 is connected to the connecting pipe 21, and the other end of each flow guiding plate 221 extends radially toward the inside of the battery housing 4 along the connecting pipe 21. In addition, each flow guiding plate 221 can be in an arc shape.

[0073] In some specific embodiments of the present utility model, electrical connectors and communication connectors are provided on the outer shell. The atomizing nozzles 20 are respectively lower than the electrical connectors and the communication connectors, which can reduce the influence of the fire extinguishing agent on the electrical connectors and the communication connectors.

[0074] In some specific embodiments of the present utility model, a pressure relief structure 30 is provided on the outer shell. The pressure relief structure 30 is used to guide the fire extinguishing agent in the outer shell to flow out of the outer shell.

[0075] Specifically, the pressure relief structure 30 can be provided on the outer shell. It should be noted that one or more pressure relief structures 30 can be provided on each outer shell, which is not limited herein. The pressure relief structure 30 can include, but is not limited to, pressure relief holes.

[0076] Since a pressure relief valve is provided on the battery housing 4, the pressure relief valve can allow gas to pass through and prevent liquid from passing through. In the initial stage of fire extinguishing, the fire extinguishing agent is ejected in a mist form. Coupled with a large amount of gas generated by the fire in the battery housing 4, the pressure inside the battery housing 4 increases. At this time, the pressure relief valve can be pushed open for pressure relief. Part of the fire extinguishing agent will remain inside the battery housing 4 in a liquid form, and the other part of the fire extinguishing agent vapor can overflow through the pressure relief structure 30.

[0077] In the later stage of fire extinguishing, the battery housing 4 is filled with liquid fire extinguishing agent. When the liquid level of the fire extinguishing agent is higher than the pressure relief structure 30, the fire extinguishing agent can flow out of the battery housing 4 through the pressure relief structure 30. This not only ensures that the battery housing 4 is in a submerged state, but also ensures the pressure balance inside and outside the battery housing 4. At the same time, it can also achieve controllable cleaning of the fire extinguishing agent, avoiding the leakage of the fire extinguishing agent to other battery housings 4 or other structures of the energy storage device 2, such as BMS, distribution box, fire-fighting acquisition module, air-conditioning equipment, etc., thereby avoiding destructive effects on other battery housings 4 and other structures of the energy storage device 2. Therefore, after fire extinguishing, only the battery housing 4 where the fire occurred needs to be replaced, and there is no need to repair or replace other structures.

[0078] In addition, when the fire extinguishing agent flows out through the pressure relief structure 30, enough fire extinguishing agent accumulates in the battery housing 4, which can effectively prevent the battery housing 4 where a fire has occurred from experiencing secondary thermal runaway.

[0079] In this embodiment, the pressure relief structure 30 is provided on the outer shell. When steam condenses and accumulates inside the battery housing 4, the flow direction of the fire extinguishing agent overflowing from the battery housing 4 can be controlled through the pressure relief structure 30. On the one hand, it keeps the battery housing 4 in a submerged state to ensure pressure balance inside and outside the battery housing 4. On the other hand, it prevents the fire extinguishing agent from damaging other battery housings 4 and other structures of the energy storage device 2, resulting in lower maintenance costs and less loss after extinguishing the fire.

[0080] According to an embodiment of the present invention, the pressure relief structure 30 is higher than the atomizing nozzle 20. The atomizing nozzle 20 is arranged at a lower position, and the fire extinguishing agent sprayed by it will spread from bottom to top to the inside of this battery housing 4 after being heated and vaporized, which can effectively cool down all parts of the battery housing 4 and is beneficial to improving the fire extinguishing efficiency. The pressure relief structure 30 is arranged at a higher position, so that enough fire extinguishing agent can accumulate in the battery housing 4 before the fire extinguishing agent flows out through the pressure relief structure 30, thereby effectively preventing the battery housing 4 where a fire has occurred from experiencing secondary thermal runaway.

[0081] According to some alternative embodiments of the present invention, the pressure relief structure 30 includes a diversion nozzle. One end of the diversion nozzle is communicated with the accommodating cavity, and the other end of the diversion nozzle extends towards the outside of the outer shell, for guiding the fire extinguishing agent flow away from the outer surface of the outer shell.

[0082] Specifically, the diversion nozzle has a converging and guiding effect on the liquid, and can direct the fire extinguishing agent overflowing from the battery housing 4 to the inner wall surface of the cabinet body 3 in the energy storage device 2, so that the fire extinguishing agent slides down along the inner wall surface of the cabinet body 3 to the bottom of the cabinet body 3 and is discharged through the bottom of the cabinet body 3. On the one hand, it avoids other structures inside the cabinet body 3 being soaked by the fire extinguishing agent due to inability to be discharged. On the other hand, it avoids the water flow ejected from hitting the cabinet door 3a of the cabinet body 3 and then rebounding towards the area where the battery housing 4 is located, and further avoids the fire extinguishing agent from splashing on the electrical connectors or communication connectors outside the battery housing 4, so as to avoid having an adverse impact on the stable operation of the energy storage device 2.

[0083] Optionally, the diversion nozzle can be in a duckbill shape.

[0084] In some specific embodiments of the present invention, electrical connectors and communication connectors are provided on the outer shell. In the horizontal direction, the length of the diversion nozzle extending out of the outer shell is respectively greater than the lengths of the electrical connectors and communication connectors extending out of the outer shell, so as to avoid the fire extinguishing agent flowing out of the diversion nozzle from splashing on the electrical connectors or communication connectors outside the battery housing 4 and having an adverse impact on the stable operation of the energy storage device 2.

[0085] The embodiment of the present utility model further provides a battery assembly, which includes a battery housing and a battery cell according to any of the above embodiments. The battery cell is accommodated in the accommodation cavity of the battery housing. Optionally, the battery assembly may be a battery pack.

[0086] Since the battery assembly according to the embodiment of the present utility model has the above technical effects, the battery assembly according to the embodiment of the present utility model also has corresponding technical effects, that is, it can independently spray and extinguish fire inside a single battery housing 4, achieving point-to-point precise fire extinguishing control. At the same time, by using the atomizing nozzle 20 to spray the fire extinguishing agent, it can not only rapidly cool down by the gasification of the fire extinguishing agent, but also rapidly spread to the entire battery housing 4 to achieve rapid fire extinguishing.

[0087] The embodiment of the present utility model further provides an energy storage device, which includes a battery assembly according to any of the above embodiments. Optionally, the energy storage device may be an energy storage cabinet.

[0088] Since the battery assembly according to the embodiment of the present utility model has the above technical effects, the energy storage device according to the embodiment of the present utility model also has corresponding technical effects, that is, it can independently spray and extinguish fire inside a single battery housing 4, achieving point-to-point precise fire extinguishing control. At the same time, by using the atomizing nozzle 20 to spray the fire extinguishing agent, it can not only rapidly cool down by the gasification of the fire extinguishing agent, but also rapidly spread to the entire battery housing 4 to achieve rapid fire extinguishing.

[0089] In some specific embodiments of the present utility model, the energy storage device further includes: a cabinet body 3, the cabinet body 3 defines an accommodation space, and a plurality of battery assemblies are stacked in the accommodation space.

[0090] That is to say, the energy storage device may be an energy storage cabinet. In this embodiment, atomizing nozzles are provided in each battery assembly of the energy storage cabinet, which is beneficial to achieving point-to-point precise fire extinguishing control and preventing a thermally out-of-control battery assembly from affecting the normal operation of other battery assemblies.

[0091] The embodiment of the present utility model further provides an energy storage system, which includes an energy storage device and a fire pipe assembly according to any of the above embodiments. The fire pipe assembly is communicated with the atomizing nozzle 20 and is used for conveying the fire extinguishing agent.

[0092] Since the energy storage device according to the embodiment of the present utility model has the above technical effects, the energy storage system according to the embodiment of the present utility model also has corresponding technical effects, that is, it can independently spray and extinguish fire inside a single battery housing 4, achieving point-to-point precise fire extinguishing control. At the same time, by using the atomizing nozzle 20 to spray the fire extinguishing agent, it can not only rapidly cool down by the gasification of the fire extinguishing agent, but also rapidly spread to the entire battery housing 4 to achieve rapid fire extinguishing.

[0093] According to an embodiment of the present utility model, a fire pipe assembly 10 includes a main pipe 11 and at least one branch pipe 12. The main pipe 11 is communicated with a water source. Each branch pipe 12 is communicated with the main pipe 11 and extends in the vertical direction, and each branch pipe 12 is communicated with at least one atomizing nozzle 20.

[0094] In other words, the fire pipe assembly 10 of this embodiment is mainly composed of the main pipe 11 and at least one branch pipe 12. Among them, the main pipe 11 can be communicated with the water source, and the fire extinguishing agent can be water. One or more branch pipes 12 can be connected to the main pipe 11. Specifically, the main pipe 11 can penetrate through the compartments of multiple energy storage devices 2, and at least one branch pipe 12 can be provided in each compartment of the energy storage device 2, and each column of vertically arranged battery cases 4 can correspond to one branch pipe 12.

[0095] As Figure 1 and Figure 2 shown, a plurality of connectors 13 can be connected to each branch pipe 12, the end of the connector 13 can extend into the battery case 4 to form a liquid outlet 14, and the atomizing nozzle 20 can be connected to the end of the connector 13. Optionally, the connector 13 can be a tee.

[0096] One or more connectors 13 can be connected to each battery case 4. Optionally, the number of battery cases 4 in each column is equal to the number of connectors 13 on a single branch pipe 12, and a corresponding structure can be provided on each battery case 4.

[0097] In this embodiment, by cooperating the main pipe 11 and at least one branch pipe 12 and arranging a plurality of connectors 13 on the branch pipe 12, the fire pipe assembly 10 can be communicated with each battery case 4, realizing point-to-point atomizing cooling and fire extinguishing, and improving the accuracy and controllability of fire extinguishing.

[0098] In some specific embodiments, a part of the main pipe 11 can extend in the horizontal direction and be arranged on the top of the cabinet 3.

[0099] According to some other embodiments of the present utility model, a connector 13 is provided between the atomizing nozzle 20 and the branch pipe 12. The connector 13 has a liquid outlet 14, the atomizing nozzle 20 is arranged at the liquid outlet 14, and the diameter of the liquid outlet 14 is smaller than the inner diameter of the branch pipe 12. In this embodiment, the Venturi effect can be utilized. This effect is manifested in that when a restricted flow passes through a reduced cross-section of the flow path, the fluid shows a phenomenon of increasing flow velocity, and its flow velocity is inversely proportional to the cross-section of the flow path. Therefore, the high-pressure fire extinguishing agent can pass through a narrow channel and strike the atomizing nozzle 20 at a high speed to quickly form a fire-fighting water mist to start fire extinguishing, which is beneficial to enhancing the atomizing effect and thus enhancing the fire extinguishing effect.

[0100] According to some other embodiments of the present utility model, the energy storage system 1 further includes a current collector plate 50 which is arranged at a distance from the battery housing 4 in the horizontal direction and is used to guide the fire extinguishing agent overflowing from the battery housing 4 to the bottom of the energy storage device 2.

[0101] Specifically, the fire extinguishing agent overflowing from the battery housing 4 can be guided by the pressure relief structure 30 to the current collector plate 50, and then uniformly flow to the bottom of the cabinet body 3 through the current collector plate 50 and be discharged. Since the temperature of the current collector plate 50 is lower than the temperature inside the battery housing 4 on fire, the gaseous fire extinguishing agent condenses into water droplets on the current collector plate 50 and slides down. The current collector plate 50 can be used to guide the flow direction of the fire extinguishing agent, conduct centralized flow control on the overflowing fire extinguishing agent, and prevent other structures inside the cabinet body 3 from being affected.

[0102] In some alternative embodiments, the current collector plate 50 can be integrated on the cabinet door 3a of the cabinet body 3 to improve the convenience of its processing and assembly.

[0103] In some specific embodiments of the present utility model, as Figure 5 shown, in the direction from top to bottom, the current collector plate 50 is inclined away from the battery housing 4.

[0104] That is to say, the current collector plate 50 can be inclined at a certain angle relative to the vertical direction, and in the direction from top to bottom, the horizontal distance between the current collector plate 50 and the battery housing 4 gradually increases, which can prevent the water mist of the fire extinguishing agent from vertically impacting the current collector plate 50 and then rebounding to the battery housing 4 to wet the electrical connectors and communication connectors.

[0105] Optionally, the angle between the current collector plate 50 and the vertical plane can be ≤ 10°.

[0106] In some other embodiments, the surface of the current collector plate 50 facing the pressure relief structure 30 is a rough surface, and after the water droplets accumulate on the rough surface, they can slide down along the rough surface, preventing the water droplets from directly falling vertically when the current collector plate 50 is inclined.

[0107] According to some alternative embodiments of the present utility model, a hydrophobic coating is provided on the side of the current collector plate 50 facing the pressure relief structure 30, which can ensure that when the fire extinguishing agent is sprayed onto the current collector plate 50, it can flow downward with a smaller water flow to the drain opening at the bottom of the cabinet body 3.

[0108] According to some other embodiments of the present utility model, the current collector plate 50 is made of a soft material, and the soft material can absorb impacts, preventing some of the water mist of the fire extinguishing agent from rebounding to the area where the battery housing 4 is located, so as to ensure that the fire extinguishing agent is smoothly drained to the drain opening at the bottom of the cabinet body 3. For example, the current collector plate 50 can be made of a film such as EVA.

[0109] In some specific embodiments of the present utility model, as Figure 6As shown, the energy storage system 1 further includes a current collecting structure 60. The current collecting structure 60 is arranged at a horizontal interval from the pressure relief structure 30. The current collecting structure 60 has a plurality of current collecting channels 61. The plurality of current collecting channels 61 are arranged in the vertical direction. In the direction from top to bottom, each current collecting channel 61 extends away from the battery housing 4.

[0110] In this embodiment, the current collecting channel 61 can be used to guide the fire extinguishing agent mist water to a position far away from the area where the battery housing 4 is located and then flow downward to the drain outlet at the bottom of the cabinet 3, so as to control the current collection of the overflowing fire extinguishing agent and prevent other structures in the cabinet 3 from being affected by the fire extinguishing agent.

[0111] In summary, for the energy storage system 1 of the present invention, atomizing nozzles 20 capable of communicating with the fire fighting pipe assembly 10 are arranged inside the battery housing 4. Each atomizing nozzle 20 is independent and can independently spray and extinguish the corresponding battery housing 4, achieving point-to-point precise fire extinguishing control. At the same time, the atomizing nozzles 20 are used to spray the fire extinguishing agent, which can not only rapidly cool down by gasification of the fire extinguishing agent, but also quickly diffuse throughout the battery housing 4 to achieve rapid fire extinguishing. In addition, a pressure relief structure 30 is provided on the battery housing 4. After the steam condenses and accumulates inside the battery housing 4, the flow direction of the overflowing fire extinguishing agent in the battery housing 4 can be controlled through the pressure relief structure 30. On the one hand, the battery housing 4 is kept in a submerged state to ensure the pressure balance inside and outside the battery housing 4. On the other hand, the fire extinguishing agent is prevented from damaging other battery housings 4 and other structures of the energy storage device 2, and the maintenance cost after fire extinguishing is lower and the loss is smaller.

[0112] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery housing, characterized in that, Comprising: A housing, the housing defining a receiving cavity adapted to receive an electric core. An atomizing nozzle, the atomizing nozzle being disposed in the receiving cavity for spraying a fire extinguishing agent onto the electric core; the housing includes a bottom plate, side plates and a top plate, and the atomizing nozzle is disposed on the side plate and / or the bottom plate.

2. The battery housing according to claim 1, wherein Further comprising: A connector, one end of the connector penetrating through the outer surface of the housing to form a liquid inlet, and the other end of the connector having a liquid outlet, and the atomizing nozzle is disposed at the liquid outlet.

3. The battery housing according to claim 2, characterized in that, Further comprising: A sensing member, the sensing member being located inside the housing and blocking the liquid outlet, and the sensing member can be broken or melted under a preset temperature or a preset pressure.

4. The battery housing according to claim 2, wherein, The atomizing nozzle includes: A connecting pipe, one end of the connecting pipe being communicated with the connector, and at least one hollowed-out area being provided on the circumferential direction of the connecting pipe itself; A water mist radiation plate, the water mist radiation plate being disposed at the other end of the connecting pipe.

5. The battery housing according to claim 4, characterized in that The diameter of the water mist radiation plate is d1, and the caliber of the liquid outlet is d2, 12*d2 ≤ d1 ≤ 15*d2.

6. The battery housing according to claim 4, characterized in that, The water mist radiation plate is in a petal shape.

7. The battery housing according to claim 1, characterized in that, An electrical connector and a communication connector are provided on the housing, and the atomizing nozzle is respectively lower than the electrical connector and the communication connector.

8. The battery housing according to claim 1, wherein, A pressure relief structure is provided on the housing, and the pressure relief structure is used to guide the fire extinguishing agent in the housing to flow out of the housing.

9. The battery housing according to claim 8, wherein The pressure relief structure is higher than the atomizing nozzle.

10. The battery housing according to claim 8, characterized in that, The pressure relief structure includes: A diversion nozzle, one end of the diversion nozzle being communicated with the receiving cavity, and the other end of the diversion nozzle extending towards the outside of the housing for guiding the fire extinguishing agent flow away from the outer surface of the housing.

11. The battery housing according to claim 10, characterized in that, An electrical connector and a communication connector are provided on the housing, and in the horizontal direction, the length of the diversion nozzle extending out of the housing is respectively greater than the length of the electrical connector extending out of the housing and the length of the communication connector extending out of the housing.

12. A battery assembly, characterized in that, Comprising: A battery housing, the battery housing being the battery housing according to any one of claims 1-11; An electric core, the electric core being disposed in the receiving cavity.

13. An energy storage device, characterized in that, Comprising: The battery assembly according to claim 12.

14. The energy storage device according to claim 13, wherein Further comprising: A cabinet body, the cabinet body defining a receiving space, and a plurality of the battery assemblies are stacked in the receiving space.

15. An energy storage system, characterized in that, Comprising: An energy storage device, the energy storage device being the energy storage device according to claim 13 or 14; A fire fighting pipe assembly, the fire fighting pipe assembly being communicated with the atomizing nozzle for transporting a fire extinguishing agent.

16. The energy storage system according to claim 15, wherein, The fire fighting pipe assembly includes: A main pipe, the main pipe being communicated with a water source; At least one branch pipe, each branch pipe being communicated with the main pipe and extending in the vertical direction, and each branch pipe being communicated with at least one of the atomizing nozzles.

17. The energy storage system according to claim 16, wherein A connector is provided between the atomizing nozzle and the branch pipe, the connector having a liquid outlet, the atomizing nozzle being disposed at the liquid outlet, and the caliber of the liquid outlet is smaller than the inner diameter of the branch pipe.

18. The energy storage system according to claim 15, wherein Further comprising: A current collecting plate, the current collecting plate being spaced apart from the battery housing in the horizontal direction for guiding the fire extinguishing agent overflowing from the battery housing to the bottom of the energy storage device.

19. The energy storage system according to claim 18, wherein, In the direction from top to bottom, the current collecting plate is inclined towards the direction away from the battery housing.

20. The energy storage system according to claim 18, wherein, A hydrophobic coating is provided on the side of the current collecting plate facing the battery housing.

21. The energy storage system according to claim 18, wherein, The material of the current collecting plate is a soft material.

22. The energy storage system according to claim 15, wherein Further comprising: A current collecting structure, the current collecting structure is arranged at a distance from the outer shell in the horizontal direction, the current collecting structure has a plurality of current collecting channels, the plurality of current collecting channels are arranged in the vertical direction, and in the direction from top to bottom, each of the current collecting channels extends in a direction away from the battery housing.

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