Energy storage system

Abstract

The utility model discloses an energy storage system which comprises a plurality of battery cabinets, a plurality of battery modules are installed in the battery cabinets, each battery module is composed of a plurality of battery cells, anti-explosion valves are arranged on the battery cells, the battery cabinets are arranged in an installation chamber, and the energy storage system further comprises a smoke pipeline extending from the interior of the installation chamber to the exterior of the installation chamber. The part, positioned in the mounting chamber, of the flue gas pipeline is communicated with the anti-explosion valve of each battery cell. When the battery cells of the battery module are thermally out of control and harmful gases are sprayed out, the gases can be directly discharged into the external environment through the flue gas pipeline and cannot enter the mounting chamber where the battery cabinet is positioned; therefore, the harmful gas generated by the thermal runaway of the battery cell can be effectively prevented from generating serious pollution or causing fire and explosion in a relatively closed space, the harm of the harmful gas to workers is also avoided, the harm caused by the thermal runaway is effectively reduced, and the working safety of the energy storage system is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery cabinet technical field especially an energy storage system. BACKGROUND

[0002] A large number of battery modules are installed in the energy storage battery cabinet, when the battery module generates thermal runaway, it will emit toxic, harmful, flammable and explosive gas with corrosive property, and the energy storage battery cabinet is generally arranged in a relatively closed space, if the gas generated by thermal runaway cannot be treated or discharged in time, it will cause fire explosion or serious pollution in the installation space of the energy storage battery cabinet, not only corrodes and damages the energy storage equipment, but also may cause harm to the personal safety of the staff.

[0003] The utility model discloses a battery cabinet and power supply system, its technical scheme includes cabinet, at least one air inlet pipe and at least one exhaust pipe, the cabinet is closed structure, the first end of air inlet pipe is fixedly arranged on the first position of cabinet, the first end of exhaust pipe is fixedly arranged on the second position of cabinet, the distance from second position to the top of cabinet is less than the distance from first position to the top of cabinet, and the second end of exhaust pipe is located above the top of cabinet. The technical scheme of the patent document utilizes the chimney effect formed by the air inlet pipe and the air outlet pipe to discharge hydrogen in the cabinet, which can reduce the concentration of hydrogen in the cabinet and improve the safety of the battery cabinet. The technical scheme of the patent document mainly discharges hydrogen in the battery cabinet mechanism through the exhaust pipe, which cannot directly discharge the gas generated by the thermal runaway of the battery cell. The gas generated by the thermal runaway of the battery cell will enter the cabinet and then be discharged through the exhaust pipe, which cannot avoid the harm to the equipment in the cabinet and other normal battery cells. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that: provide a kind of energy storage system, which can discharge gas to the outside of energy storage system when battery cell generates thermal runaway, to effectively improve the safety of energy storage system.

[0005] To solve the above technical problems, the utility model employs the following technical scheme: an energy storage system includes multiple battery cabinets, multiple battery modules are installed in each battery cabinet, each battery module is composed of multiple battery cells, an explosion-proof valve is provided on each battery cell, each battery cabinet is arranged in an installation chamber, and a flue gas pipeline extends from the inside of the installation chamber to the outside of the installation chamber; the part of the flue gas pipeline located inside the installation chamber is in communication with the explosion-proof valves of the battery cells.

[0006] As an improvement of the above scheme, a flue gas treatment mechanism is arranged outside the installation chamber, and the flue gas treatment mechanism is in communication with the part of the flue gas pipeline located outside the installation chamber.

[0007] As the improvement of the above scheme: the flue gas treatment mechanism comprises a chimney arranged in suspension; a top of the chimney is an outlet end, a top cover fixedly connected with the chimney is arranged above the outlet end in interval, and a bottom of the chimney is an inlet end communicated with the part of the flue gas pipeline located outside the installation room.

[0008] As the improvement of the above scheme: the top cover is a conical top cover, and a large end of the conical top cover is arranged towards the outlet end of the chimney.

[0009] As the improvement of the above scheme: the flue gas treatment mechanism further comprises a flue gas purification device; the flue gas purification device is communicated between the chimney and the part of the flue gas pipeline located outside the installation room.

[0010] As the improvement of the above scheme: the explosion-proof valves of the plurality of battery cells in the battery module are communicated through the flow guides, the flow guides of the plurality of battery modules in the battery cabinet are communicated through the battery cabinet pipelines, and the battery cabinet pipelines of the plurality of battery cabinets are communicated with the part of the flue gas pipeline located inside the installation room.

[0011] As the improvement of the above scheme: a first check valve is arranged at the communication position of the flow guide and the battery cabinet pipeline, and a second check valve is arranged at the communication position of the battery cabinet pipeline and the flue gas pipeline.

[0012] As the improvement of the above scheme: the part of the flue gas pipeline located outside the installation room is communicated with a branch flue gas pipeline, and a third check valve is further arranged between the part of the flue gas pipeline located outside the installation room and the part of the flue gas pipeline connected with the branch flue gas pipeline.

[0013] The beneficial effects of the utility model are: the utility model discloses a flue gas pipeline is directly communicated with the explosion-proof valve of the battery cell in the battery cabinet and the external environment outside the installation room, when the battery cell of the battery module is out of control and sprays harmful gas, these gases can be directly discharged to the external environment through the flue gas pipeline, and the harmful gas generated by the battery cell out of control can not enter the installation room, thereby effectively avoiding the harmful gas generated by the battery cell out of control from causing serious pollution in the relatively closed space or causing fire and explosion, and the harmful gas can not harm the staff, the harm caused by the battery cell out of control is effectively reduced, and the working safety of the energy storage system is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic view of the first embodiment of the utility model;

[0015] Figure 2 It is the structural schematic view of the second embodiment of the utility model.

[0016] Marked in the figure: 100 - installation room, 200 - battery cabinet, 300 - battery module, 400 - battery cell, 410 - explosion-proof valve, 500 - flue gas pipeline, 510 - flow guide, 520 - battery cabinet pipeline, 530 - first check valve, 540 - second check valve, 550 - branch flue gas pipeline, 560 - third check valve, 600 - flue gas treatment mechanism, 610 - flue, 620 - top cover, 630 - flue gas purification equipment. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present application, the present application will be further described below in conjunction with the drawings.

[0018] In the description of the present application, it should be pointed out that the terms "front", "back", "left", "right", "up", "down", "inside" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0019] As shown in Figure 1 and Figure 2 The energy storage system disclosed by the present application installs the battery cabinet 200 in the installation room 100, and the installation room 100 can adopt a relatively closed space structure such as a container or a factory room. A plurality of battery cabinets 200 are arranged in the installation room 100, and a plurality of battery modules 300 are installed in each battery cabinet 200. Each battery module 300 is composed of a plurality of battery cells 400, and each battery cell 400 is provided with an explosion-proof valve 410. When the battery cell 400 occurs thermal runaway, it will produce toxic, harmful, flammable, explosive and corrosive gas. In order to avoid the discharge of these gases into the installation room 100 and cause adverse harm to the equipment in the installation room 100 or the battery modules 300 of other battery cabinets 200 in the installation room 100, a flue gas pipeline 500 is arranged to discharge these gases. The flue gas pipeline 500 extends from the inside of the installation room 100 to the outside of the installation room 100, that is, one end of the flue gas pipeline 500 is located in the installation room 100 as the gas inlet end, and the other end of the flue gas pipeline 500 is located outside the installation room 100 as the gas outlet end. The gas inlet end of the flue gas pipeline 500 is communicated with the explosion-proof valve 410 of each battery cell 400, so that the gas generated by the battery cell 400 that occurs thermal runaway can directly enter the flue gas pipeline 500 after being discharged through the explosion-proof valve 410, and then be discharged to the outside of the installation room 100 through the flue gas pipeline 500, thereby effectively avoiding the pollution of these gases to other equipment in the installation room 100 or other battery modules 300, and ensuring that the air environment inside the installation room 100 is not polluted.

[0020] Specifically, the connection and cooperation mode of the flue gas pipeline 500 and the explosion-proof valve 410 of the battery cell 400 is as shown in Figure 1 and Figure 2 The explosion-proof valves 410 of the plurality of battery cells 400 in the battery module 300 are communicated through the flow director 510, the flow directors 510 of the plurality of battery modules 300 in the battery cabinet 200 are communicated through the battery cabinet pipeline 520, the explosion-proof valves 410 of the plurality of battery cells 400 in the same battery module 300 are connected in parallel on the flow director 510 through the flow director 510, and the battery cabinet pipelines 520 of the plurality of battery cabinets 200 are communicated with the part of the flue gas pipeline 500 located inside the installation room 100, i.e., the gas inlet end of the flue gas pipeline 500. In order to facilitate the connection between the flow director 510 and the battery cabinet pipeline 520, a pipeline joint can be installed on the flow director 510 to form a connection relationship in communication with the battery cabinet pipeline 520. The pipeline joint can be preferably a plug-in type quick-mounting and quick-dismounting joint to improve the convenience of dismounting work.

[0021] Embodiment 1

[0022] As shown in Figure 1 , a plurality of battery cabinets 200 are installed inside the installation room 100, a plurality of battery modules 300 are installed in each battery cabinet 200, each battery module 300 is composed of a plurality of battery cells 400, the explosion-proof valve 410 of each battery cell 400 is connected to the flow director 510, the flow director 510 is communicated with the battery cabinet pipeline 520 fixed on the battery cabinet 200 through the pipeline joint, and the battery cabinet pipeline 520 corresponding to each battery cabinet 200 is communicated with the gas inlet end of the flue gas pipeline 500. The gas outlet end of the flue gas pipeline 500 extends out of the installation room 100 and is communicated with the flue gas treatment mechanism 600 arranged outside the installation room 100.

[0023] A first check valve 530 is arranged at the communication position of the flow director 510 and the battery cabinet pipeline 520, and a second check valve 540 is arranged at the communication position of the battery cabinet pipeline 520 and the flue gas pipeline 500. The above-mentioned check valves are arranged to avoid backflow of flue gas during the flow process.

[0024] The flue gas treatment mechanism 600 is provided with a chimney 610 suspended by a support, the inlet end of the chimney 610 is communicated with the gas outlet end of the flue gas pipeline 500, a top cover 620 is arranged above the outlet end of the chimney 610, and the top cover 620 is suspended by a support to leave a gap between the top cover 620 and the outlet end of the chimney 610 for flue gas discharge. In order to avoid backflow of flue gas, the bottom of the chimney 610 can also be arranged to be higher than the extension height of the flue gas pipeline 500. The top cover 620 adopts a conical top cover, which includes a circular conical top cover or a triangular pyramid top cover, a quadrangular pyramid top cover and the like. The large end of the conical top cover is arranged towards the outlet end of the chimney 610 to facilitate the flow of flue gas along the inner wall surface of the conical top cover.

[0025] When a battery cell 400 experiences thermal runaway, the harmful gases emitted by that battery cell 400 can be discharged through the corresponding explosion-proof valve 410, and then enter the flow guide 510. Under the guidance of the flow guide 510, the gases enter the battery cabinet pipe 520 of the corresponding battery cabinet 200, and then enter the air inlet of the flue gas pipe 500. The gases flow along the flue gas pipe 500 to the exhaust end of the flue gas pipe 500 and enter the chimney 610 connected to the exhaust end. Finally, the gases are dispersed into the surrounding environment.

[0026] Example 2

[0027] like Figure 2 As shown, multiple battery cabinets 200 are installed inside the installation chamber 100. Each battery cabinet 200 contains multiple battery modules 300. Each battery module 300 is composed of multiple battery cells 400. The explosion-proof valves 410 of each battery cell 400 are connected to the flow guides 510. The flow guides 510 are connected to the battery cabinet pipes 520 fixed on the battery cabinets 200 through pipe joints. The battery cabinet pipes 520 corresponding to each battery cabinet 200 are then connected to the air inlet of the flue gas pipe 500. The exhaust end of the flue gas pipe 500 extends out of the installation chamber 100 and is connected to the flue gas treatment mechanism 600 located outside the installation chamber 100. The flue gas duct 500 is located outside the installation chamber 100 and is connected to a branch flue gas duct 550. The branch flue gas duct 550 can be connected to the flue gas ducts 500 in other installation chambers 100 to realize the series connection of multiple energy storage systems. The flue gas of multiple energy storage systems is treated by a flue gas treatment device 600.

[0028] A first check valve 530 is installed at the connection between the flow guide 510 and the battery cabinet pipe 520. A second check valve 540 is installed at the connection between the battery cabinet pipe 520 and the flue gas pipe 500. A third check valve 560 is also installed between the portion of the flue gas pipe 500 located outside the installation chamber 100 and the portion of the flue gas pipe 500 connecting to the branch flue gas pipe 550. These check valves are used to prevent backflow of flue gas during its flow.

[0029] The flue gas treatment mechanism 600 is provided with a chimney 610, a top cover 620 and a flue gas purification device 630. The flue gas purification device 630 is installed between the chimney 610 and the part of the flue gas pipeline 500 located outside the installation chamber 100, and the flue gas purification device 630 is in communication with the exhaust end of the flue gas pipeline 610. The chimney 610 is suspended by a support. The chimney 610 is a vertically arranged hollow cylindrical structure. The bottom of the chimney 610 is the inlet end, and the top of the chimney 610 is the outlet end. The inlet end of the chimney 610 is in communication with the flue gas purification device 630. The top cover 620 is arranged above the outlet end of the chimney 610. The top cover 620 is suspended by a support to leave a gap between the top cover 620 and the outlet end of the chimney 610 for flue gas to flow out. In order to avoid backflow of flue gas, the bottom of the chimney 610 can also be arranged to be higher than the extension height of the flue gas pipeline 500. The top cover 620 is a conical top cover, which includes a conical top cover or a triangular pyramid top cover, a quadrangular pyramid top cover and the like. The large end of the conical top cover is arranged towards the outlet end of the chimney 610 to facilitate the flow of flue gas along the inner wall surface of the conical top cover and to block rainwater from entering the flue gas treatment mechanism 600.

[0030] When a certain battery cell 400 has a thermal runaway failure, the harmful gas discharged by the battery cell 400 can be discharged through the corresponding explosion-proof valve 410, then enter the flow guide 510, and then enter the battery cabinet pipeline 520 of the corresponding battery cabinet 200 under the flow guiding effect of the flow guide 510, and then enter the gas inlet end of the flue gas pipeline 500, flow along the flue gas pipeline 500 to the exhaust end of the flue gas pipeline 500 and enter the flue gas purification device 630 in communication with the exhaust end. The harmful gas is filtered and purified in the flue gas purification device 630. The purified flue gas is discharged into the chimney 610 and finally diffused to the external environment.

Claims

1. An energy storage system, comprising a plurality of battery cabinets (200), a plurality of battery modules (300) are installed in the battery cabinet (200), the battery module (300) is composed of a plurality of battery cells (400), and an explosion-proof valve (410) is arranged on the battery cell (400), characterized in that: The battery cabinet (200) is arranged in the installation room (100), and further comprises a flue gas pipeline (500) extending from the inside of the installation room (100) to the outside of the installation room (100); the part of the flue gas pipeline (500) located in the installation room (100) is in communication with the explosion-proof valve (410) of each battery cell (400).

2. The energy storage system of claim 1, wherein: Further comprising a flue gas treatment mechanism (600) arranged outside the installation room (100), the flue gas treatment mechanism (600) being in communication with the part of the flue gas pipeline (500) located outside the installation room (100).

3. The energy storage system of claim 2, wherein: The flue gas treatment mechanism (600) comprises a chimney (610) arranged in suspension; the top of the chimney (610) is an outlet end, and a top cover (620) fixedly connected with the chimney (610) is arranged above the outlet end in an interval manner; the bottom of the chimney (610) is an inlet end in communication with the part of the flue gas pipeline (500) located outside the installation room (100).

4. The energy storage system of claim 3, wherein: The top cover (620) is a conical top cover, and the large end of the conical top cover is arranged towards the outlet end of the chimney (610).

5. The energy storage system of claim 3, wherein: The flue gas treatment mechanism (600) further comprises a flue gas purification device (630); the flue gas purification device (630) is in communication between the chimney (610) and the part of the flue gas pipeline (500) located outside the installation room (100).

6. The energy storage system of claim 1, wherein: The explosion-proof valves (410) of the plurality of battery cells (400) in the battery module (300) are in communication through the flow director (510), the flow directors (510) of the plurality of battery modules (300) in the battery cabinet (200) are in communication through the battery cabinet pipeline (520), and the battery cabinet pipelines (520) of the plurality of battery cabinets (200) are in communication with the part of the flue gas pipeline (500) located inside the installation room (100).

7. The energy storage system of claim 6, wherein: The communication part of the flow director (510) and the battery cabinet pipeline (520) is provided with a first check valve (530), and the communication part of the battery cabinet pipeline (520) and the flue gas pipeline (500) is provided with a second check valve (540).

8. The energy storage system of claim 7, wherein: The part of the flue gas pipeline (500) located outside the installation room (100) is in communication with a branch flue gas pipeline (550), and a third check valve (560) is further arranged between the part of the flue gas pipeline (500) located outside the installation room (100) and the part of the flue gas pipeline (500) connected with the branch flue gas pipeline (550).

Images