Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises an energy storage device and a fire-fighting device, the energy storage device comprises a battery pack, the battery pack comprises a shell and a battery module arranged in the shell, and the fire-fighting device comprises a storage part provided with a storage cavity used for storing fire-fighting liquid; the main machine comprises a machine shell, a controller arranged in the machine shell and a communicating pipeline arranged in the machine shell in a penetrating mode. The fluid power mechanism and the control valve are both in control connection with the controller. The fire-fighting part comprises a fire-fighting pipeline and an atomizing nozzle, one end of the fire-fighting pipeline is communicated with the storage cavity through a communicating pipeline, the other end of the fire-fighting pipeline is communicated with the atomizing nozzle, at least part of the atomizing nozzle is located in the shell, and the fire-fighting liquid in the storage cavity is gasified by the atomizing nozzle to form fire-fighting gas to be sprayed into the battery pack. According to the technical scheme, the energy storage system not only can carry out fire fighting on the interior of the battery pack, but also can improve the energy density of the battery pack and improve the fire fighting efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage systems, and in particular to an energy storage system. Background Art

[0002] Lithium batteries are widely used in new energy electric vehicles, energy storage, and power grids. However, fires and even explosions in electric vehicles and energy storage power plants are a frequent occurrence, caused by issues with the batteries themselves and technical bottlenecks in various technologies. Therefore, improving firefighting and rescue methods for runaway battery packs is a crucial task to ensure the safety of new energy electric vehicles and energy storage power plants and prevent casualties.

[0003] Battery packs can catch fire in extreme situations like thermal runaway. Fire typically originates from a single cell or module and spreads to adjacent packs, even the entire cluster, and ultimately the entire energy storage container. Therefore, pack-level firefighting is the first level of firefighting that is most effective in preventing fires in energy storage plants.

[0004] There are several existing fire safety protection measures. One is to deploy a fire protection system outside the battery pack to submerge it, but this approach makes it difficult to cool down the battery pack interior. Another approach involves laying pipes inside the battery pack and installing suspended sprinkler heads. However, this approach increases the battery pack's volume and reduces its energy density when there are too many pipes and sprinkler heads. If there are not enough pipes and sprinkler heads, the liquid inflow is slow and the injection volume is high, making it difficult to extinguish the fire in the battery pack quickly, resulting in low firefighting efficiency. Utility Model Content

[0005] The main purpose of the present utility model is to provide an energy storage system, which can not only carry out fire protection inside the battery pack, but also increase the energy density of the battery pack and improve the fire protection efficiency.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an energy storage system, including an energy storage device and a fire-fighting device, the energy storage device includes a battery pack, the battery pack includes a shell and a battery module arranged in the shell, the fire-fighting device includes: a storage part, having a storage chamber for storing fire-fighting fluid; a main unit, located on one side of the storage part, the main unit includes a casing, a controller arranged in the casing, a connecting pipe passing through the casing, a control valve arranged in the connecting pipe and a fluid power mechanism arranged in the connecting pipe, the fluid power mechanism and the control valve are both controlled and connected to the controller; a fire-fighting part, including a fire-fighting pipeline and an atomizing nozzle, one end of the fire-fighting pipeline is connected to the storage chamber through the connecting pipe, and the other end of the fire-fighting pipeline is connected to the atomizing nozzle, at least part of the atomizing nozzle is located inside the shell, and the fire-fighting fluid in the storage chamber is vaporized by the atomizing nozzle to form fire-fighting gas and sprayed into the battery pack.

[0007] Furthermore, a first quick-release part is provided on the fire-fighting pipeline, and the atomizing nozzle includes: a nozzle body, which is passed through the shell, and the outlet end of the nozzle body is located inside the shell; a second quick-release part, the inlet end of the nozzle body is located outside the shell and connected to the second quick-release part, and the nozzle body and the fire-fighting pipeline are quickly disassembled and assembled through the first quick-release part and the second quick-release part.

[0008] Furthermore, the energy storage system also includes a support frame, the storage part is installed on the top of the support frame, and the main machine is installed on one circumferential side of the support frame.

[0009] Furthermore, the bottom of the storage portion is higher than the top of the host.

[0010] Furthermore, there are multiple atomizing nozzles and multiple battery packs, and the multiple atomizing nozzles are arranged corresponding to the multiple battery packs. The fire-fighting pipeline includes a main pipeline and multiple branch pipelines connected to the main pipeline, and the multiple branch pipelines are connected to the multiple atomizing nozzles accordingly.

[0011] Furthermore, the fire department also includes: a liquid pipeline; a first nozzle, which is inserted into the shell, the water outlet end of the first nozzle is located in the shell, and the other end of the first nozzle is connected to the liquid pipeline.

[0012] Furthermore, the fire department also includes: a liquid cooling plate, which is arranged on one side of the shell; a second nozzle, which passes through the shell, the water outlet end of the second nozzle is located in the shell, and the other end of the second nozzle is connected to the liquid cooling plate.

[0013] Furthermore, the housing includes a shell and a cover plate detachably connected to the shell, and the atomizing nozzle, the first nozzle and the second nozzle are arranged on the cover plate.

[0014] Furthermore, the first nozzle and the second nozzle are respectively located on opposite sides of the atomizing nozzle.

[0015] Furthermore, the energy storage system also includes a monitoring unit located above the energy storage device, which is connected to the controller for controlling the operation of the control valve according to the signal transmitted by the monitoring unit. The monitoring unit includes a temperature sensor and / or a smoke sensor.

[0016] By applying the technical solution of the present invention, when a battery pack experiences thermal runaway, the controller controls the fluid power mechanism to operate and opens the control valve, so that the liquid perfluorohexanone in the storage chamber is transported to the atomizing nozzle through the fire-fighting pipeline. The liquid perfluorohexanone is then converted into a gas through the atomizing nozzle and quickly fills the battery pack in thermal runaway, forming an aerogel in the outer shell to instantly isolate oxygen, quickly achieve a fire extinguishing effect, and cool the battery pack in thermal runaway, thereby improving the fire-fighting efficiency. Furthermore, compared with the prior art in which multiple sprinkler heads are provided to simultaneously spray and cool the battery pack in thermal runaway at multiple angles, in this embodiment, a single atomizing nozzle is provided to quickly fill the inner shell of the battery pack with fire-fighting gas, thereby reducing the volume of the battery pack and increasing the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of the energy storage system of the present utility model is shown;

[0019] Figure 2 Shown Figure 1 A partial enlarged view of the energy storage system;

[0020] Figure 3 Shown Figure 1 A schematic structural diagram of a support frame of an energy storage system in one direction;

[0021] Figure 4 Shown Figure 1 A schematic structural diagram of the support frame of the energy storage system in another direction;

[0022] Figure 5 Shown Figure 1 A schematic structural diagram of a cover plate of a battery pack of an energy storage system;

[0023] Figure 6 Shown Figure 5 Schematic diagram of the structure of the atomizing nozzle of the energy storage system.

[0024] The above drawings include the following reference numerals:

[0025] 10. Storage unit; 20. Main unit; 30. Fire protection pipe; 31. Main pipe; 32. Branch pipe; 41. First quick-release part; 42. Second quick-release part; 51. Atomizing nozzle; 52. First nozzle; 53. Second nozzle; 54. Cover plate; 70. Support frame. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that in the embodiment of the present invention, perfluorohexanone is used as a fire extinguishing agent for gas fire fighting, that is, liquid perfluorohexanone is filled into the storage chamber, and the liquid perfluorohexanone is converted into gaseous perfluorohexanone through the action of the atomizing nozzle to extinguish the battery pack.

[0028] like Figures 1 to 6 As shown, an embodiment of the present invention provides an energy storage system. The energy storage system includes an energy storage device and a fire-fighting device. The energy storage device includes a battery pack, which includes a housing and a battery module disposed within the housing. The fire-fighting device includes: a storage unit 10 having a storage chamber for storing fire-fighting fluid; a main unit 20 located on one side of the storage unit 10, including a housing, a controller disposed within the housing, a connecting pipe extending through the housing, a control valve disposed within the connecting pipe, and a fluid power mechanism disposed within the connecting pipe, wherein the fluid power mechanism and the control valve are both controllably connected to the controller; and a fire-fighting unit including a fire-fighting pipeline 30 and an atomizing nozzle 51. One end of the fire-fighting pipeline 30 is connected to the storage chamber via the connecting pipe, and the other end of the fire-fighting pipeline 30 is connected to the atomizing nozzle 51. At least a portion of the atomizing nozzle 51 is located within the housing. The fire-fighting fluid in the storage chamber is vaporized by the atomizing nozzle 51 to form fire-fighting gas that is sprayed into the battery pack.

[0029] In the above technical solution, when the battery pack experiences thermal runaway, the controller controls the fluid power mechanism to operate and opens the control valve so that the liquid perfluorohexanone in the storage chamber is transported to the atomizing nozzle 51 through the fire-fighting pipe 30. Then, the liquid perfluorohexanone is converted into gas through the atomizing nozzle and quickly fills the battery pack with thermal runaway, forming aerogel in the shell to instantly isolate oxygen, quickly achieve the fire extinguishing effect, and cool the battery pack with thermal runaway, thereby improving the fire-fighting efficiency. Furthermore, compared with the prior art in which multiple sprinkler heads are set up to spray and cool the battery pack with thermal runaway at multiple angles at the same time, in this embodiment, a single atomizing nozzle is set up to quickly fill the inside of the battery pack shell with fire-fighting gas, thereby reducing the volume of the battery pack and increasing the energy density of the battery pack.

[0030] Furthermore, the energy storage system of this embodiment solves the problems of slow injection speed of liquid immersion firefighting and difficulty of firefighting liquid reaching all parts of the battery pack.

[0031] Specifically, in an embodiment of the present invention, the energy storage system further includes an energy storage container, and the energy storage device and the fire-fighting device are both installed in the energy storage container.

[0032] like Figure 2 and Figure 6 As shown, in the embodiment of the present invention, a first quick-release component 41 is provided on the fire-fighting pipe 30, and the atomizing nozzle 51 includes: a nozzle body, which is passed through the shell, and the outlet end of the nozzle body is located inside the shell; a second quick-release component 42, the inlet end of the nozzle body is located outside the shell and is connected to the second quick-release component 42, and the nozzle body and the fire-fighting pipe 30 are quickly disassembled and assembled through the first quick-release component 41 and the second quick-release component 42.

[0033] Through the above-mentioned arrangement, quick disassembly and assembly between the fire-fighting pipe 30 and the atomizing nozzle 51 can be achieved, thereby facilitating the connection of the atomizing nozzle 51 on the battery pack with the fire-fighting pipe 30, and also facilitating the removal of the atomizing nozzle 51 from the fire-fighting pipe 30, thereby facilitating the maintenance of the atomizing nozzle 51.

[0034] It should be noted that, in the embodiment of the present invention, the first quick release member 41 and the second quick release member 42 may adopt existing structures, which will not be described in detail here.

[0035] Specifically, in an embodiment of the present invention, three mounting through holes are provided on the outer shell, and the three mounting through holes are used to install the atomizing nozzle 51, the first nozzle 52 and the second nozzle 53 respectively. The atomizing nozzle 51, the first nozzle 52 and the second nozzle 53 are all installed on the outer shell using locking components such as bolts.

[0036] like Figure 1 、 Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the energy storage system further includes a support frame 70, the storage unit 10 is mounted on the top of the support frame 70, and the main unit 20 is mounted on one circumferential side of the support frame 70. This allows the storage unit 10 and the main unit 20 to be installed in a convenient manner, thus saving space.

[0037] like Figure 1 As shown, in the embodiment of the present invention, the bottom of the storage portion 10 is higher than the top of the main unit 20. This is conducive to the fire-fighting liquid being able to smoothly enter the main unit 20 through the storage portion 10 and pass through the control valve of the main unit 20.

[0038] Specifically, in an embodiment of the present invention, the energy storage system further includes a monitoring unit located above the energy storage device. The monitoring unit is controllably connected to a controller, which controls the operation of a control valve based on signals transmitted by the monitoring unit. The monitoring unit includes a temperature sensor and a smoke sensor. Thus, when thermal runaway occurs in the battery pack, the temperature sensor can detect a temperature rise within the energy storage container, and the smoke sensor can detect smoke. Thus, the controller can control the operation of the control valve based on the signals transmitted by the temperature and smoke sensors, allowing the firefighting liquid within the storage unit 10 to enter the atomizing nozzle, where it is then activated by the atomizing nozzle 51 to form firefighting gas. This firefighting gas quickly fills the interior of the battery pack, thereby providing gas firefighting protection for the battery pack.

[0039] Specifically, in the embodiment of the present invention, the temperature sensor and the smoke sensor are both installed on the top wall of the energy storage container.

[0040] In one embodiment, the monitoring unit may also only include a temperature sensor or a smoke sensor.

[0041] Preferably, in an embodiment of the present invention, the temperature sensing component is a temperature sensor, and the smoke sensing component is a smoke detector.

[0042] like Figure 2 As shown, in the embodiment of the present invention, there are multiple atomizing nozzles 51 and multiple battery packs. The multiple atomizing nozzles 51 are correspondingly arranged for the multiple battery packs. The fire protection pipeline 30 includes a main pipeline 31 and multiple branch pipelines 32 connected to the main pipeline 31. The multiple branch pipelines 32 are correspondingly connected to the multiple atomizing nozzles 51. In this way, gas fire protection can be carried out on multiple battery packs.

[0043] It should be noted that in an embodiment of the present invention, a battery management system and a temperature sensor controllably connected to the battery management system are provided on the housing of each battery pack. The energy storage system further includes multiple solenoid valves, each of which is correspondingly disposed on multiple branch lines. Each solenoid valve is controllably connected to the battery management system of the corresponding battery pack. Each battery management system is connected to the controller of the host 20 via CAN communication. Both a temperature sensor and a smoke sensor are controllably connected to each battery management system. Specifically, the temperature sensor and the smoke sensor are controllably connected to the controller via each battery management system. Thus, when thermal runaway occurs in one of the multiple battery packs, the temperature sensor can detect a temperature rise within the energy storage container, and the smoke sensor can detect smoke. Each battery management system, based on signals transmitted by the temperature sensor and the smoke sensor, controls the temperature sensor within each battery pack to detect the temperature within each battery pack, thereby determining which battery pack has experienced thermal runaway. The battery management system of the battery pack experiencing thermal runaway then issues commands to the controller and the solenoid valve, respectively, based on the temperature signals detected by the temperature sensor, causing the controller to control the valve to open and the solenoid valve corresponding to the battery pack experiencing thermal runaway to open. The aforementioned control method can be implemented using existing techniques and will not be further described herein.

[0044] It should be noted that, in the embodiment of the present invention, the battery management system of each battery pack can record the fault status fed back by the host and record it in the historical faults.

[0045] It should be noted that in the embodiment of the present invention, the atomizing nozzle 51 can realize 6 battery pack-level spot sprays under the control of each battery management system and controller. The first spray time is 45s and the spray dose is 1.65L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; after an interval of 10 minutes, the spray time is 3s and the spray dose is 0.11L; the total spray time is 60s and the spray dose is about 2.2L. The control logic for the above-mentioned control spot spraying can adopt the existing technology and will not be repeated here.

[0046] like Figure 5 As shown, in an embodiment of the present invention, the fire department further includes: a liquid pipeline; a first nozzle 52, which is passed through the shell, the water outlet end of the first nozzle 52 is located inside the shell, and the other end of the first nozzle 52 is connected to the liquid pipeline.

[0047] Through the above arrangement, not only can the fire-fighting gas be used to extinguish the battery pack that has thermal runaway, but also the first nozzle 52 connected to the liquid pipeline can be used to inject liquid into the battery pack to immerse the battery module, thereby preventing the battery pack from reigniting.

[0048] Specifically, in an embodiment of the present invention, the energy storage system also includes a liquid storage tank for providing fire-fighting liquid (e.g., water) to the liquid pipeline. The first nozzle 52 is connected to the liquid pipeline through an electromagnetic valve to control the opening and closing of the first nozzle 52. The liquid pipeline, the liquid storage tank, and the electromagnetic valve can all adopt existing technologies, as long as the fire-fighting liquid can be introduced into the battery pack that has thermal runaway. No further details will be given here.

[0049] like Figure 5 As shown, in this embodiment of the present invention, the firefighting unit further includes a liquid cooling plate mounted on one side of the housing; a second nozzle 53 extending through the housing, with the water outlet of the second nozzle 53 located within the housing and the other end of the second nozzle 53 communicating with the liquid cooling plate. This allows the coolant in the liquid cooling plate to flow into the housing through the second nozzle 53 in the event of thermal runaway of the battery pack, accelerating the immersion of the battery module and preventing re-ignition of the battery pack.

[0050] Furthermore, by injecting liquid into the battery pack simultaneously through the first nozzle 52 and the second nozzle 53, the battery pack can be effectively prevented from reigniting, and the battery pack can be extinguished by three methods: gas fire fighting, fire fighting liquid fire fighting, and coolant fire fighting. The three fire fighting methods work simultaneously to form multiple insurances, which greatly improves safety. The use of three fire fighting methods greatly optimizes the energy storage fire fighting plan and enhances the fire safety of the energy storage system. In addition, the structure is simple, the scope of application is wide, and the production cost is low.

[0051] It should be noted that in the embodiment of the present invention, the second nozzle 53 is connected to the liquid cooling plate through a battery valve to control the opening and closing of the second nozzle 53. The liquid cooling plate is used to cool the battery module in the battery pack. The specific structure of the liquid cooling plate, the connection method between the liquid cooling plate and the outer shell, the installation method of the solenoid valve and the control of the solenoid valve can all adopt existing technologies and will not be repeated here.

[0052] like Figure 5 As shown, in the embodiment of the present invention, the housing includes a shell and a cover plate 54 detachably connected to the shell, and the atomizing nozzle 51, the first nozzle 52, and the second nozzle 53 are disposed on the cover plate 54. In this way, if any of the atomizing nozzle 51, the first nozzle 52, and the second nozzle 53 fails, the cover plate 54 can be removed for easy maintenance.

[0053] like Figure 5 As shown, in the embodiment of the present invention, the first nozzle 52 and the second nozzle 53 are respectively located on opposite sides of the atomizing nozzle 51. In this way, liquid is injected into the interior of the shell on both sides of the atomizing nozzle 51, solving the problems of insufficient injection speed and insufficient injection amount of firefighting liquid.

[0054] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: when the battery pack has thermal runaway, the controller controls the fluid power mechanism to work and opens the control valve to allow the liquid perfluorohexanone in the storage chamber to be transported to the atomizing nozzle through the fire-fighting pipeline, and then the liquid perfluorohexanone is converted into gas through the atomizing nozzle and quickly fills the battery pack with thermal runaway, forming aerogel in the shell to instantly isolate oxygen, quickly achieve the fire extinguishing effect, and cool the battery pack with thermal runaway, thereby improving the fire-fighting efficiency; further, compared with the prior art in which multiple sprinkler heads are set to simultaneously spray and cool the battery pack with thermal runaway at multiple angles, in this embodiment, a single atomizing nozzle is set to quickly fill the inside of the battery pack shell with fire-fighting gas, thereby reducing the volume of the battery pack and increasing the energy density of the battery pack.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An energy storage system, characterized in that: The device comprises an energy storage device and a fire-fighting device, wherein the energy storage device comprises a battery pack, the battery pack comprises a housing and a battery module arranged in the housing, and the fire-fighting device comprises: A storage portion (10) having a storage cavity for storing fire-fighting fluid; A main unit (20) is located on one side of the storage unit (10), and the main unit (20) includes a housing, a controller disposed in the housing, a communication pipeline passing through the housing, a control valve disposed in the communication pipeline, and a fluid power mechanism disposed in the communication pipeline, wherein the fluid power mechanism and the control valve are both controllably connected to the controller; The fire-fighting unit comprises a fire-fighting pipeline (30) and an atomizing nozzle (51), one end of the fire-fighting pipeline (30) is connected to the storage chamber through the connecting pipeline, and the other end of the fire-fighting pipeline (30) is connected to the atomizing nozzle (51), at least part of the atomizing nozzle (51) is located inside the shell, and the fire-fighting liquid in the storage chamber is gasified by the atomizing nozzle (51) to form fire-fighting gas and sprayed into the battery pack.

2. The energy storage system according to claim 1, characterized in that The fire-fighting pipeline (30) is provided with a first quick-release component (41), and the atomizing nozzle (51) comprises: A nozzle body is provided through the shell, and an outlet end of the nozzle body is located inside the shell; A second quick-release component (42), the inlet end of the nozzle body is located outside the shell and is connected to the second quick-release component (42), and the nozzle body and the fire-fighting pipeline (30) are quickly disassembled and assembled through the first quick-release component (41) and the second quick-release component (42).

3. The energy storage system according to claim 1, characterized in that The energy storage system further comprises a support frame (70), the storage portion (10) is mounted on the top end of the support frame (70), and the host (20) is mounted on one circumferential side of the support frame (70).

4. The energy storage system according to claim 3, characterized in that The bottom of the storage portion (10) is higher than the top of the host (20).

5. The energy storage system according to any one of claims 1 to 4, characterized in that: There are a plurality of atomizing nozzles (51), a plurality of battery packs, and the plurality of atomizing nozzles (51) are arranged correspondingly to the plurality of battery packs. The fire-fighting pipeline (30) includes a main pipeline (31) and a plurality of branch pipelines (32) connected to the main pipeline (31), and the plurality of branch pipelines (32) are connected to the plurality of atomizing nozzles (51) correspondingly.

6. The energy storage system according to any one of claims 1 to 4, characterized in that: The fire department also includes: Liquid pipelines; A first nozzle (52) is provided through the housing, a water outlet end of the first nozzle (52) is located inside the housing, and the other end of the first nozzle (52) is communicated with the liquid pipeline.

7. The energy storage system according to claim 6, characterized in that: The fire department also includes: a liquid cooling plate, disposed on one side of the housing; The second nozzle (53) is provided through the shell, the water outlet end of the second nozzle (53) is located inside the shell, and the other end of the second nozzle (53) is communicated with the liquid cooling plate.

8. The energy storage system according to claim 7, characterized in that: The housing comprises a shell and a cover plate (54) detachably connected to the shell, and the atomizing nozzle (51), the first nozzle (52) and the second nozzle (53) are arranged on the cover plate (54).

9. The energy storage system according to claim 7, characterized in that: The first nozzle (52) and the second nozzle (53) are respectively located on opposite sides of the atomizing nozzle (51).

10. The energy storage system according to any one of claims 1 to 4, characterized in that: The energy storage system further includes a monitoring unit located above the energy storage device, the monitoring unit being control-connected to the controller, and the controller controlling the operation of the control valve according to the signal transmitted by the monitoring unit, and the monitoring unit including a temperature sensor and / or a smoke sensor.

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