CN223092995U - Battery housing, battery assembly, energy storage device and energy storage system - Google Patents

Abstract

The utility model provides a battery shell, a battery assembly, an energy storage device and an energy storage system, wherein the battery shell comprises: an outer shell, the outer shell defines a receiving cavity suitable for receiving a battery cell; an atomizing nozzle, the atomizing nozzle is arranged in the receiving cavity, and is used to spray a fire extinguishing agent to the battery cell. The battery shell of the utility model is provided with an atomizing nozzle in the outer shell, which can independently spray and extinguish the interior of a single battery shell, realizing point-to-point precise fire extinguishing control, and at the same time, the atomizing nozzle is used to spray the fire extinguishing agent, which can not only utilize the gasification of the fire extinguishing agent to quickly cool down, but also can quickly diffuse to the entire battery shell to realize rapid fire extinguishing, thereby improving the fire extinguishing efficiency.

Description

Battery housing, battery assembly, energy storage device and energy storage system

Technical Field

The utility model relates to the technical field of energy storage equipment protection, in particular to a battery shell, a battery assembly, energy storage equipment and an energy storage system.

Background

In the related art, the battery assembly may include, but is not limited to, a battery pack and a powered device using the battery pack. Thermal runaway of the battery assembly is a serious safety problem in that the thermal runaway process releases a large amount of heat, and serious fire and explosion may be caused. In the prior art, a fire protection system is usually arranged outside the battery assembly, and the thermal runaway of the battery assembly is controlled by spraying or immersing. However, external fire extinguishing systems are difficult to extinguish fire accurately and have low fire extinguishing efficiency.

Disclosure of utility model

The first object of the application is to provide a new technical scheme of a battery shell, which at least can solve one of the problems of inaccurate fire extinguishment and low fire extinguishment efficiency in the prior art.

A second object of the present application is to provide a battery assembly including the above battery case.

A third object of the present application is to provide an energy storage device comprising the above battery assembly.

A fourth object of the present application is to provide an energy storage system comprising an energy storage device as described above.

According to a first aspect of the application, there is provided a battery housing comprising a housing defining a receiving cavity adapted to receive a battery cell, and an atomizer disposed within the receiving cavity for injecting a fire suppressant to the battery cell.

Optionally, the shell comprises a bottom plate, a side plate and a top plate, and the atomizing nozzle is arranged on the side plate and/or the bottom plate.

Optionally, the battery shell further comprises a connector, one end of the connector penetrates through the outer surface of the shell and forms a liquid inlet, the other end of the connector is provided with a liquid outlet, and the atomizing nozzle is arranged at the liquid outlet.

Optionally, the battery shell further comprises a sensing piece, wherein the sensing piece is positioned in the shell and seals the liquid outlet, and the sensing piece can be broken or melted at a preset temperature or a preset pressure.

Optionally, the atomizing nozzle comprises a connecting pipe, a water mist radiation plate and a water mist radiation plate, wherein one end of the connecting pipe is communicated with the joint, the connecting pipe is provided with at least one hollow area in the circumferential direction, and the water mist radiation plate is arranged at the other end of the connecting pipe.

Optionally, the diameter of the water mist radiation plate is d1, and the caliber of the liquid outlet is d2, and d2 is more than or equal to 12 and less than or equal to d1 and less than or equal to 15 and d2.

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

Optionally, an electrical connector and a communication connector are arranged on the shell, and the atomizing nozzle is lower than the electrical connector and the communication connector respectively.

Optionally, a pressure relief structure is arranged on the shell, and the pressure relief structure is used for guiding the fire extinguishing agent in the shell to flow out of the shell.

Optionally, the pressure relief structure is higher than the atomizer head.

Optionally, the pressure relief structure comprises a flow guide nozzle, one end of the flow guide nozzle is communicated with the accommodating cavity, and the other end of the flow guide nozzle extends outwards of the shell and is used for guiding the fire extinguishing agent flow away from the outer surface of the shell.

Optionally, an electrical connector and a communication connector are arranged 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.

According to a second aspect of the application, a battery assembly is provided, which is characterized by comprising a battery shell, wherein the battery shell is the battery shell according to the first aspect, and a battery core is arranged in the accommodating cavity.

According to a third aspect of the present application there is provided an energy storage device comprising a battery assembly as described in the second aspect.

Optionally, the energy storage device further comprises a cabinet body, wherein the cabinet body is limited with an accommodating space, and a plurality of battery assemblies are stacked in the accommodating space.

According to a fourth aspect of the present application, there is provided an energy storage system comprising an energy storage device as described in the third aspect, and a fire tube assembly in communication with the atomising spray head for delivering a fire extinguishing agent.

Optionally, the fire tube assembly comprises a main tube which is communicated with a water source, and at least one branch tube, wherein each branch tube is communicated with the main tube and extends in the vertical direction, and each branch tube is communicated with at least one atomizing nozzle.

Optionally, a connector is arranged between the atomizing nozzle and the branch pipe, the connector is provided with a liquid outlet, the atomizing nozzle is arranged at the liquid outlet, and the caliber of the liquid outlet is smaller than the inner diameter of the branch pipe.

Optionally, the energy storage system further comprises a current collecting plate arranged at a distance from the battery shell in the horizontal direction for guiding the fire extinguishing agent overflowing the battery shell to flow to the bottom of the energy storage device.

Alternatively, the current collecting plate is inclined in a direction away from the battery case in a top-down direction.

Optionally, a side of the current collector plate facing the battery case is provided with a hydrophobic coating.

Optionally, the material of the current collecting plate is soft material.

Optionally, the energy storage system further comprises a current collecting structure which is arranged at intervals from the shell in the horizontal direction, wherein the current collecting structure is provided with a plurality of current collecting channels, the current collecting channels are arranged in the vertical direction, and each current collecting channel extends in the direction away from the battery shell from top to bottom.

According to the battery shell, the atomizing nozzle is arranged in the shell, so that independent spraying fire extinguishing can be performed on the inside of a single battery shell, point-to-point accurate fire extinguishing control is realized, meanwhile, the atomizing nozzle is utilized to spray fire extinguishing agent, the fire extinguishing agent can be gasified and cooled rapidly, and can be rapidly diffused into the whole battery shell to realize rapid fire extinguishing, and the fire extinguishing efficiency is improved.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic front view of an energy storage system according to one embodiment of the present utility model;

FIG. 2 is a schematic top view of a battery assembly and manifold connection according to one embodiment of the present utility model;

FIG. 3 is a schematic view of a mist head, a fitting and a sensing member in a battery housing according to one embodiment provided by the present utility model;

fig. 4 is a schematic view of an arrangement of current collector plates in an energy storage system according to one embodiment of the present utility model;

Fig. 5 is a schematic view of an arrangement of current collector plates in an energy storage system according to yet another embodiment of the present utility model;

Fig. 6 is a schematic view illustrating an arrangement of a current collecting structure in an energy storage system according to still another embodiment of the present utility model.

Reference numerals

1. An energy storage system; 2, energy storage equipment, 3, a cabinet body, 3a, a cabinet door, 4, a battery shell, 4a, a bottom plate, 4b, a side plate, 4c, a top plate, 10, a fire tube assembly, 11, a main tube, 12, a branch tube, 13, a connector, 14, a liquid outlet, a liquid inlet 15, 20, an atomization nozzle, 21, a connecting tube, 22, a water mist radiation plate, 221, a guide plate, 30, a pressure relief structure, 40, a sensing piece, 50, a current collecting plate, 60, a current collecting structure, 61 and a current collecting channel.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The battery case 4 according to the embodiment of the present utility model will be described in detail below with reference to the drawings.

As shown in fig. 1 to 6, the battery case 4 according to the embodiment of the present utility model includes a housing and an atomizer 20.

Specifically, the housing defines a receiving chamber adapted to receive the electrical core, and the atomizer head 20 is disposed within the receiving chamber for spraying the fire suppressant agent against the electrical core.

In other words, the battery case 4 according to the embodiment of the present utility model is mainly composed of the outer case and the atomizer head 20. The battery housing 4 may be internally provided with a receiving cavity, which may be used to receive an electrical core.

The atomizing nozzle 20 may be directly connected to the housing or indirectly connected to the housing, and is not limited thereto. The electrical cells are at risk of thermal runaway, which can seriously cause a fire. The atomizing nozzle 20 in the accommodating cavity can spray the fire extinguishing agent into water mist and absorb heat in the battery shell 4. Because the area that water smoke was laid rapidly is faster bigger and the water smoke disperses faster and the heat evaporation when absorbing the conflagration more easily becomes vapor, more is favorable to the cooling suppression when the conflagration, consequently spouting water smoke in to the battery case 4 that takes place the conflagration is favorable to controlling the temperature in the battery case 4, carries out quick efficient fire extinguishing to the battery case 4 that fires.

In addition, the fire extinguishing agent belongs to a gas-liquid mixed phase after atomization, and the main residue after fire extinguishment is steam. The residue during fire extinguishing is only in the battery shell 4 where the fire occurs, the condition that large-scale fire extinguishing agent leaks in the energy storage equipment 2 is avoided, the point-to-point fire extinguishing with controllable fire extinguishing direction is realized, no influence is caused on other battery shells 4 after fire extinguishing, the maintenance cost after fire extinguishing is lower, the loss is lower, and meanwhile, the higher fire extinguishing reliability of the energy storage fire extinguishing system is realized.

Therefore, according to the battery shell 4 provided by the embodiment of the utility model, the atomizing nozzle 40 is arranged in the shell, so that independent spraying fire extinguishing can be performed on the inside of a single battery shell 4, the point-to-point accurate fire extinguishing control is realized, meanwhile, the atomizing nozzle 20 is utilized to spray the fire extinguishing agent, the fire extinguishing agent can be gasified and cooled rapidly, and can be rapidly diffused into the whole battery shell 4 to realize rapid fire extinguishing, and the fire extinguishing efficiency is improved.

In some alternative embodiments, the atomizer head 20 may comprise a small bore atomizer.

According to other embodiments of the present utility model, the housing includes a bottom plate 4a, side plates 4b, and a top plate 4c, and the atomizer head 20 is provided on the side plates 4b or the bottom plate 4a.

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

The atomizing nozzle 20 is arranged on the side plate 4b or the bottom plate 4a, so that the atomizing nozzle 20 is positioned at a lower position in the battery shell 4, and therefore, the fire extinguishing agent sprayed by the atomizing nozzle 20 can spread into the battery shell 4 from bottom to top after being heated and vaporized, and the battery shell 4 can be effectively cooled everywhere, thereby being beneficial to improving the fire extinguishing efficiency.

According to one embodiment of the utility model, the battery housing 4 further comprises a connector 13, one end of the connector 13 penetrates through the outer surface of the housing and forms a liquid inlet 15, the other end of the connector 13 is provided with a liquid outlet 14, and the atomizing nozzle 20 is arranged at the liquid outlet 14.

Specifically, the atomizer head 20 in the housing may communicate with the fire tube assembly 10 through the joint 13, and the fire extinguishing agent may flow to the atomizer head 20 through the joint 13. The surface of the housing may be provided with an opening communicating with the receiving chamber and the connector has at least two ports, one of which passes through the opening in the housing and is formed as a liquid inlet 15 and the other of which is located in the receiving chamber and communicates with the atomizer head 20.

In this embodiment, utilize joint 13 to communicate atomizer 20 and outside fire control pipe subassembly 10, not only realized the confession liquid of fire extinguishing agent, still provided the installation carrier for atomizer 20, have simple structure, make things convenient for the advantage of pipeline connection.

In some embodiments of the present utility model, the energy storage system 1 further includes a plurality of sensing elements 40, each sensing element 40 being positioned within the housing and sealing off the liquid outlet 14, the sensing elements 40 being capable of breaking or melting at a predetermined temperature or predetermined pressure.

Specifically, at least one of the liquid outlets 14 may be provided with a sensing member 40, and preferably, each liquid outlet 14 may be provided with a sensing member 40.

In the absence of a fire, sensing element 40 may block liquid outlet 14, preventing the flow of fire suppressant to atomizer head 20, and thus preventing the flow of fire suppressant into battery housing 4.

Sensing element 40 may include, but is not limited to, a temperature sensing element and a pressure sensing element. The temperature sensing member may be crushed or melted at a predetermined temperature, and the pressure sensing member may be crushed at a predetermined pressure. That is, at a preset temperature or a preset pressure, the sensing member 40 may release the blocking of the liquid outlet 14, so that the fire extinguishing agent may be sprayed out through the atomizer 20.

For example, the sensing member 40 may be made of a heat-sensitive material, when the temperature in the battery housing 4 reaches the preset temperature, the sensing member 40 may melt and deform to open the liquid outlet 14, at this time, the pressure in the battery housing 4 is higher, and the fire extinguishing agent flowing from the liquid outlet 14 to the atomizer 20 may be atomized rapidly, i.e. undergo the process of first accumulating pressure in the battery housing 4 and then releasing the atomized fire extinguishing agent once again, thereby realizing pressurized atomization, and being beneficial to improving the fire extinguishing effect.

In other embodiments, the sensing element 40 may be made of glass, and the sensing element 40 made of glass may be broken at a predetermined temperature or a predetermined pressure.

In this embodiment, the sensing member 40 is disposed at the liquid outlet 14, so that the on-off of the liquid outlet 14 can be controlled according to the temperature or pressure occurrence state change, the physical control fire extinguishing is realized, the electromagnetic valve in the conventional technology is cancelled, any signal control is not needed, and whether fire occurs in the battery shell 4 is directly sensed by the sensing member 40 at the tail end, so that the hazard of misinformation fire extinguishing due to the sensor is avoided, the risk of timely fire extinguishing due to the wire harness blowing between the electromagnetic valve and the controller caused by the fire is avoided, and the reliability of the battery shell 4, the battery assembly comprising the battery shell, the energy storage device 2 and the energy storage system 4 is greatly improved.

According to some alternative embodiments of the present utility model, the atomizer 20 includes a connection pipe 21 and a water mist radiation plate 22, one end of the connection pipe 21 communicates with the joint 13, and the connection pipe 21 is provided with at least one hollowed-out area in its own circumferential direction. The water mist radiation plate 22 is provided at the other end of the connection pipe 21.

Specifically, the connection pipe 21 may be connected between the joint 13 and the water mist radiation plate 22, and one or more hollow areas may be provided on the connection pipe 21, and the hollow areas may penetrate through the inner and outer wall surfaces of the connection pipe 21. The fire extinguishing agent can flow to the water mist radiation plate 22 through the hollowed-out area, and the fire extinguishing agent with high speed can be sprayed on the water mist radiation plate 22 to quickly form fire-fighting water mist to start extinguishing fire.

According to other embodiments of the present utility model, the diameter of the water mist radiation plate 22 is d1, the caliber of the liquid outlet 14 is d2, and d2 is 12×d2≤d1≤15d2.

As shown in fig. 3, the caliber of the liquid outlet 14 is the inner diameter of the tail end of the connector 13, the inner diameter of the tail end of the connector 13 can be d2, and the d1 is more than or equal to 12 x d2, which is favorable for improving the atomization effect so as to ensure good fire extinguishing effect, and the d1 is less than or equal to 15 x d2, which is favorable for controlling the size of the water mist radiation plate 22 and reducing the space occupied by the fire extinguishing nozzle in the battery shell 4.

In some embodiments of the present utility model, the water mist radiating plate 22 has a petal shape, as shown in fig. 3, and the petal-shaped water mist radiating plate 22 enables the fire extinguishing agent to be atomized rapidly after high-speed impact, which is beneficial to enhancing atomization effect.

Specifically, the water mist radiation plate 22 includes a plurality of baffle plates 221, the plurality of baffle plates 221 are arranged at intervals along the circumferential direction of the connection pipe 21, one end of each baffle plate 221 is connected to the connection pipe 21, and the other end of each baffle plate 221 extends toward the inside of the battery case 4 in the radial direction of the connection pipe 21. In addition, each of the baffles 221 may have an arc shape.

In some embodiments of the present utility model, the housing is provided with electrical and communication connectors, and the atomizer head 20 is positioned below the electrical and communication connectors, respectively, to reduce the impact of the fire suppressant on the electrical and communication connectors.

In some embodiments of the present utility model, a pressure relief structure 30 is provided on the housing, the pressure relief structure 30 being used to direct the extinguishing agent within the housing out of the housing.

Specifically, the pressure relief structures 30 may be disposed on the housing, and it should be noted that one or more pressure relief structures 30 may be disposed on each housing, which is not limited herein. The relief structure 30 may include, but is not limited to, a relief vent.

Since the battery case 4 is provided with a pressure release valve, the pressure release valve can pass gas and prevent liquid from passing. At the initial stage of fire extinguishing, the fire extinguishing agent is sprayed out to form mist, and a large amount of gas generated by the fire of the battery shell 4 is added, so that the pressure in the battery shell 4 is increased, at the moment, the pressure release valve can be pushed open to release pressure, part of the fire extinguishing agent can be left in the battery shell 4 in a liquid state, and the other part of fire extinguishing agent steam can overflow through the pressure release structure 30.

In the later stage of putting out a fire, the battery case 4 is internally accumulated with liquid fire extinguishing agent, when the liquid height of the fire extinguishing agent is higher than the pressure release structure 30, the fire extinguishing agent can flow out of the battery case 4 through the pressure release structure 30, so that the battery case 4 is in a submerged state, internal and external pressure balance of the battery case 4 can be ensured, controllable cleaning of the fire extinguishing agent can be realized, and meanwhile, the fire extinguishing agent is prevented from leaking to other battery cases 4 or other structures of the energy storage device 2, such as a BMS (battery management system), a distribution box, a fire-fighting acquisition module, an air conditioning device and the like, so that destructive influence on other battery cases 4 and other structures of the energy storage device 2 is avoided, and therefore, after putting out a fire, only the battery case 4 with fire is required to be replaced, and maintenance or replacement of other structures is not required.

In addition, when the extinguishing agent flows out through the pressure release structure 30, enough extinguishing agent is accumulated in the battery case 4, and the secondary thermal runaway of the battery case 4 in which a fire disaster occurs can be effectively avoided.

In this embodiment, set up pressure release structure 30 on the shell, after the steam condensation back is gathered in inside battery case 4, can keep battery case 4 in the submergence state through the flow direction of the fire extinguishing agent that overflows in the pressure release structure 30 control battery case 4 on the one hand, guarantee the inside and outside pressure balance of battery case 4, on the other hand avoid the fire extinguishing agent to cause the destruction to other battery cases 4 and other structures of energy storage device 2, the maintenance cost after putting out a fire is lower, and the loss is less.

According to one embodiment of the present utility model, the pressure release structure 30 is higher than the atomizer 20, the atomizer 20 is arranged at a lower position, the sprayed fire extinguishing agent is vaporized by heating and then spreads from bottom to top into the battery shell 4, so that the temperature of the battery shell 4 can be effectively reduced everywhere, the fire extinguishing efficiency is improved, the pressure release structure 30 is arranged at a higher position, and enough fire extinguishing agent can be accumulated in the battery shell 4 before the fire extinguishing agent flows out through the pressure release structure 30, thereby effectively avoiding the secondary thermal runaway of the battery shell 4 in fire.

According to some alternative embodiments of the present utility model, pressure relief structure 30 includes a deflector nozzle having one end in communication with the receiving chamber and another end extending outwardly of the housing for directing the flow of fire suppressant away from the outer surface of the housing.

Specifically, the water conservancy diversion mouth has the guide effect that gathers together to liquid, can be with the fire extinguishing agent that overflows battery case 4 in the guide energy storage device 2 cabinet body 3's internal face, so that fire extinguishing agent slides to cabinet body 3 bottom along cabinet body 3's internal face, and discharge through cabinet body 3 bottom, on the one hand avoided fire extinguishing agent to be soaked by fire extinguishing agent because of other structures in the cabinet body 3 that can't discharge leads to, on the other hand avoided the rivers that the laser and go out to spout from battery case 4 and strike cabinet door 3a of cabinet body 3, and then rebound to battery case 4 place region, and then avoid fire extinguishing agent to drench to the outside electrical joint of battery case 4 or communication joint, avoid producing adverse effect to energy storage device 2's steady operation.

Alternatively, the spout may be duckbill-shaped.

In some embodiments of the present utility model, the housing is provided with an electrical connector and a communication connector, and in the horizontal direction, the length of the flow guiding nozzle extending out of the housing is 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, so as to prevent the fire extinguishing agent flowing out of the flow guiding nozzle from being sprayed onto the electrical connector or the communication connector outside the battery housing 4, and avoid adverse effects on the stable operation of the energy storage device 2.

The embodiment of the utility model also provides a battery assembly, which comprises the battery shell and the battery cell according to any embodiment, wherein the battery cell is accommodated in the accommodating cavity of the battery shell. Alternatively, the battery assembly may be a battery pack.

Because the battery pack according to the embodiment of the utility model has the technical effects, the battery pack according to the embodiment of the utility model also has corresponding technical effects, namely, the battery pack can independently spray and extinguish fire in a single battery shell 4, so that point-to-point accurate fire extinguishing control is realized, and meanwhile, the atomizing nozzle 20 is utilized to spray the fire extinguishing agent, so that the fire extinguishing agent can be gasified and cooled down quickly, and can be rapidly diffused into the whole battery shell 4 to realize rapid fire extinguishing.

The embodiment of the utility model also provides energy storage equipment, which comprises the battery assembly according to any embodiment. Alternatively, the energy storage device may be an energy storage cabinet.

Because the battery pack according to the embodiment of the utility model has the technical effects, the energy storage device according to the embodiment of the utility model also has corresponding technical effects, namely, the energy storage device can independently spray and extinguish fire in a single battery shell 4, so that point-to-point accurate fire extinguishing control is realized, and meanwhile, the atomizing nozzle 20 is utilized to spray the fire extinguishing agent, so that the fire extinguishing agent can be gasified and cooled down quickly, and can be rapidly diffused into the whole battery shell 4 to realize rapid fire extinguishing.

In some embodiments of the present utility model, the energy storage device further includes a cabinet 3, the cabinet 3 defining an accommodating space in which a plurality of battery packs are stacked.

That is, energy storage equipment can be the energy storage cabinet, in this embodiment, all sets up atomizer in every battery pack of energy storage cabinet, is favorable to realizing the accurate fire control of point-to-point, avoids the battery pack of thermal runaway to influence other battery pack's normal work.

The embodiment of the utility model also provides an energy storage system, which comprises the energy storage equipment and the fire tube assembly according to any embodiment. Wherein the fire tube assembly communicates with the atomizer head 20 for delivering the fire suppressant.

Because the energy storage device according to the embodiment of the utility model has the technical effects, the energy storage system according to the embodiment of the utility model also has corresponding technical effects, namely, the energy storage device can independently spray and extinguish fire in the single battery shell 4, so that the point-to-point accurate fire extinguishing control is realized, and meanwhile, the atomizing nozzle 20 is utilized to spray the fire extinguishing agent, so that the fire extinguishing agent can be gasified and cooled down quickly, and can be rapidly diffused into the whole battery shell 4 to realize rapid fire extinguishing.

According to one embodiment of the present utility model, the fire tube assembly 10 includes a main tube 11 and at least one branch tube 12. The main pipe 11 is in communication with a water source. Each branch pipe 12 communicates with the main pipe 11 and extends in the vertical direction, and each branch pipe 12 communicates with at least one atomizer head 20.

In other words, the fire tube assembly 10 of the present embodiment is mainly composed of a main tube 11 and at least one branch tube 12. Wherein, the main pipe 11 can be communicated with a water source, and the fire extinguishing agent can be water. One or more branch pipes 12 may be connected to the main pipe 11. Specifically, the main pipe 11 may penetrate through cabins of the plurality of energy storage devices 2, at least one branch pipe 12 may be provided in each cabin of the energy storage devices 2, and each column of vertically arranged battery cases 4 may correspond to one branch pipe 12.

As shown in fig. 1 and 2, a plurality of connectors 13 may be connected to each of the branch pipes 12, the ends of the connectors 13 may extend into the battery case 4 and form the liquid outlet 14, and the atomizing nozzle 20 may be connected to the ends of the connectors 13. Alternatively, the joint 13 may be a tee.

One or more connectors 13 may be connected to each cell housing 4, alternatively, each column of cell housings 4 may have a number equal to the number of connectors 13 on a single manifold 12, and each cell housing 4 may have a corresponding structure.

In this embodiment, the main pipe 11 is matched with at least one branch pipe 12, and a plurality of connectors 13 are arranged on the branch pipe 12, so that the fire-fighting pipe assembly 10 is communicated with each battery shell 4, point-to-point atomization cooling fire extinguishing is realized, and the fire extinguishing accuracy and controllability are improved.

In some embodiments, a portion of the main pipe 11 may extend in a horizontal direction and be disposed at the top of the cabinet 3.

According to other embodiments of the present utility model, a joint 13 is provided between the atomizer 20 and the branch pipe 12, the joint 13 has a liquid outlet 14, the atomizer 20 is disposed at the liquid outlet 14, and the caliber of the liquid outlet 14 is smaller than the inner diameter of the branch pipe 12. In this embodiment, a venturi effect may be utilized, which is manifested in the phenomenon that when a restricted flow passes through a reduced flow cross section, the flow velocity of the fluid increases, with the flow velocity being inversely proportional to the flow cross section. Therefore, the high-pressure fire extinguishing agent can be impacted on the atomizing nozzle 20 at a high speed through the long and narrow passage to quickly form fire-fighting water mist to start extinguishing fire, which is beneficial to enhancing the atomization effect and thus the fire extinguishing effect.

According to other embodiments of the present utility model, the energy storage system 1 further comprises a current collecting plate 50, the current collecting plate 50 being arranged spaced apart from the battery housing 4 in the horizontal direction for guiding the fire extinguishing agent overflowing the battery housing 4 towards the bottom of the energy storage device 2.

Specifically, the fire extinguishing agent overflowed from the battery case 4 may be guided to the current collecting plate 50 by the pressure relief structure 30, and then uniformly flows to the bottom of the cabinet 3 through the current collecting plate 50 and is discharged. Since the temperature of the current collecting plate 50 is lower than the temperature in the battery case 4 where fire occurs, the gaseous extinguishing agent condenses on the current collecting plate 50 to be a water droplet which slides down. The flow direction of the fire extinguishing agent can be guided by the flow collecting plate 50, and the overflowed fire extinguishing agent can be subjected to flow collecting control, so that other structures in the fire extinguishing agent cabinet 3 are prevented from being influenced.

In some alternative embodiments, the current collecting plate 50 may be integrated on the cabinet door 3a of the cabinet body 3 to improve convenience in its processing and assembly.

In some embodiments of the present utility model, as shown in fig. 5, the current collecting plate 50 is inclined in a direction from top to bottom toward a direction away from the battery case 4.

That is, the current collecting plate 50 may be inclined at an angle with respect to the vertical direction, and the horizontal distance between the current collecting plate 50 and the battery case 4 is gradually increased in the top-down direction, so that it is possible to prevent the water mist of the fire extinguishing agent from bouncing to the battery case 4 to be sprayed to the electric connector and the communication connector after vertically impacting the current collecting plate 50.

Alternatively, the angle between the collector plate 50 and the vertical plane may be 10 °.

In other embodiments, the current collecting plate 50 faces one side surface of the pressure relief structure 30 so that the rough surface can be slipped along after the water drops accumulate on the rough surface, and the water drops are prevented from directly falling vertically when the current collecting plate 50 is obliquely arranged.

According to some alternative embodiments of the present utility model, the side of the collecting plate 50 facing the pressure relief structure 30 is provided with a hydrophobic coating, so that the fire extinguishing agent can flow downwards to the water outlet at the bottom of the cabinet 3 with a small water flow when being sprayed onto the collecting plate 50.

According to other embodiments of the present utility model, the collector plate 50 is made of a soft material, and the soft material can absorb impact, so as to prevent part of the mist of the fire extinguishing agent from rebounding to the area where the battery case 4 is located, so as to ensure that the fire extinguishing agent is smoothly drained to the drain outlet at the bottom of the cabinet 3. For example, the current collecting plate 50 may be made of a thin film made of EVA or the like.

In some embodiments of the present utility model, as shown in fig. 6, the energy storage system 1 further includes a current collecting structure 60, the current collecting structure 60 being disposed apart from the pressure releasing structure 30 in a horizontal direction, the current collecting structure 60 having a plurality of current collecting channels 61, the plurality of current collecting channels 61 being arranged in a vertical direction, each current collecting channel 61 extending in a direction away from the battery case 4 in a top-down direction.

In this embodiment, the collecting channel 61 is used to guide the mist of fire extinguishing agent to a position far away from the area where the battery case 4 is located, and then to flow down to the water outlet at the bottom of the cabinet 3, so as to control the collecting of the overflowed fire extinguishing agent, and avoid the influence of other structures in the fire extinguishing agent cabinet 3.

In summary, according to the energy storage system 1 disclosed by the utility model, the atomizing nozzles 20 capable of being communicated with the fire tube assembly 10 are arranged in the battery shell 4, each atomizing nozzle 20 is mutually independent, and can independently spray and extinguish fire to the corresponding battery shell 4, so that point-to-point accurate fire extinguishing control is realized, meanwhile, the atomizing nozzles 20 are utilized to spray fire extinguishing agent, and the fire extinguishing agent can be gasified and cooled rapidly and can be rapidly diffused into the whole battery shell 4 to realize rapid fire extinguishing. In addition, the pressure relief structure 30 is arranged on the battery shell 4 in a matching way, after the steam is condensed and accumulated in the battery shell 4, the flow direction of the extinguishing agent overflowed in the battery shell 4 can be controlled through the pressure relief structure 30, so that the battery shell 4 is kept in a submerged state, the balance of the pressure inside and outside the battery shell 4 is ensured, the other structures of other battery shells 4 and the energy storage device 2 are prevented from being damaged by the extinguishing agent, the maintenance cost after extinguishment is lower, and the loss is smaller.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (22)

1. A battery case, comprising:

A housing defining a receiving cavity adapted to receive a battery cell;

the shell comprises a bottom plate, side plates and a top plate, and the atomizing nozzle is arranged on the side plates and/or the bottom plate.

2. The battery case according to claim 1, further comprising:

The connector, the one end of connector runs through the surface of shell and forms the inlet, the other end of connector has the liquid outlet, atomizer locates the liquid outlet.

3. The battery case according to claim 2, further comprising:

The sensing piece is positioned in the shell and is used for sealing the liquid outlet, and the sensing piece can be broken or melted at preset temperature or preset pressure.

4. The battery housing of claim 2, wherein the atomizer comprises:

One end of the connecting pipe is communicated with the joint, and the connecting pipe is provided with at least one hollow area in the circumferential direction;

And the water mist radiation plate is arranged at the other end of the connecting pipe.

5. The battery case according to claim 4, wherein the diameter of the water mist radiation plate is d1, the caliber of the liquid outlet is d2, and d2 is 12 x 2 is less than or equal to d1 and less than or equal to 15 x 2.

6. The battery case according to claim 4, wherein the water mist radiation plate has a petal shape.

7. The battery housing of claim 1, wherein an electrical connector and a communication connector are provided on the housing, the atomizer being lower than the electrical connector and the communication connector, respectively.

8. The battery housing of claim 1, wherein a pressure relief structure is provided on the housing for directing the fire suppressant within the housing out of the housing.

9. The battery housing of claim 8, wherein the pressure relief structure is higher than the atomizer head.

10. The battery housing of claim 8, wherein the pressure relief structure comprises:

And one end of the flow guide nozzle is communicated with the accommodating cavity, and the other end of the flow guide nozzle extends outwards of the shell and is used for guiding the fire extinguishing agent flow to be far away from the outer surface of the shell.

11. The battery housing of claim 10, wherein the housing is provided with an electrical connector and a communication connector, and wherein the length of the flow nozzle extending out of the housing is 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, respectively, in a horizontal direction.

12. A battery assembly, comprising:

a battery case according to any one of claims 1 to 11;

And the battery cell is arranged in the accommodating cavity.

13. An energy storage device comprising a battery assembly as defined in claim 12.

14. The energy storage device of claim 13, further comprising:

The cabinet body, the cabinet body is limited with accommodation space, a plurality of battery pack range upon range of set up in accommodation space.

15. An energy storage system, comprising:

An energy storage device of claim 13 or 14;

and the fire-fighting pipe assembly is communicated with the atomizing nozzle and is used for conveying fire extinguishing agent.

16. The energy storage system of claim 15, wherein the fire tube assembly comprises:

The main pipe is communicated with a water source;

At least one branch pipe, each branch pipe is communicated with the main pipe and extends in the vertical direction, and each branch pipe is communicated with at least one atomizing nozzle.

17. The energy storage system of claim 16, wherein a joint is provided between the atomizer and the branch pipe, the joint having a liquid outlet, the atomizer being provided at the liquid outlet, the liquid outlet having a smaller diameter than the inner diameter of the branch pipe.

18. The energy storage system of claim 15, further comprising:

And the current collecting plate is arranged at a distance from the battery shell in the horizontal direction and is used for guiding the fire extinguishing agent overflowing the battery shell to flow to the bottom of the energy storage device.

19. The energy storage system of claim 18, wherein the collector plate is inclined in a top-down direction away from the cell housing.

20. The energy storage system of claim 18, wherein a side of the current collector plate facing the cell housing is provided with a hydrophobic coating.

21. The energy storage system of claim 18, wherein the collector plate is a soft material.

22. The energy storage system of claim 15, further comprising:

And a current collecting structure disposed spaced apart from the case in a horizontal direction, the current collecting structure having a plurality of current collecting channels arranged in a vertical direction, each of the current collecting channels extending in a direction away from the battery case in a top-down direction.