Battery pack and energy storage device with same

Abstract

The utility model discloses a battery pack and an energy storage device with the same, the battery pack comprises a shell, a battery module, a monitoring module and a fire sprinkler, and the shell is provided with an accommodating cavity; the battery module is arranged in the accommodating cavity; the monitoring module is arranged on the battery module and is used for monitoring the battery module; the fire-fighting spray head is arranged on the shell and is used for communicating the accommodating cavity and an external storage tank for storing fire-fighting substances; wherein the monitoring module is suitable for transmitting an abnormal signal to the controller, and the controller controls fire-fighting substances in the external storage tank to be sprayed to the containing cavity through the fire-fighting sprayer. According to the battery pack disclosed by the utility model, the monitoring module is arranged on the battery module, so that whether the battery pack is subjected to thermal runaway or not can be accurately judged, and when the battery pack is applied to the energy storage device, the volume of the energy storage device can be reduced, and the service life of the energy storage device can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack and an energy storage device having the same. Background Art

[0002] In the related art, the energy storage device usually includes multiple battery cells. In order to improve the safety of the energy storage device, a fire-fighting gas cylinder is set in each battery cell to release fire-fighting gas into the battery cell when the battery cell is in thermal runaway. This results in an excessive number of fire-fighting gas cylinders in the energy storage device, which increases the weight and volume of the energy storage device. In addition, since there is no monitoring module for monitoring internal abnormalities in the battery cell, when a battery cell is in thermal runaway, the battery cells adjacent to it will also open the fire-fighting gas cylinder due to the high ambient temperature, causing damage to the battery cells that are not in thermal runaway, thus affecting the service life of the energy storage device. In addition, the packaging board used to package the battery cells is equipped with a fire control device, which makes the packaging board complex in structure, increases the height of the energy storage device, and is not conducive to stacking. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery pack that can accurately determine whether the battery pack has thermal runaway. When the battery pack is used in an energy storage device, the outer surface of the battery pack is regular, which is conducive to stacking the battery pack, and the volume of the energy storage device can be reduced, and the service life of the energy storage device can be increased.

[0004] Another object of the present invention is to provide an energy storage device using the above-mentioned battery pack.

[0005] The battery pack according to the embodiment of the first aspect of the utility model includes: a shell having a accommodating cavity; a battery module, the battery module being arranged in the accommodating cavity; a monitoring module, the monitoring module being arranged on the battery module and used for monitoring the battery module; a fire sprinkler, the fire sprinkler being arranged on the shell and used for connecting the accommodating cavity and an external storage tank for storing fire-fighting materials; wherein the monitoring module is suitable for transmitting an abnormal signal to a controller, and the controller controls the fire-fighting materials in the external storage tank to be sprayed toward the accommodating cavity through the fire sprinkler.

[0006] According to the battery pack of the embodiment of the utility model, by setting a monitoring device on the battery module, and the monitoring device can transmit abnormal signals to the battery management system, the battery management system controls the external storage tank to deliver fire-fighting materials to the accommodating cavity when the battery module is in thermal runaway. Therefore, it is possible to accurately determine whether the battery pack has thermal runaway. When the battery pack is used in an energy storage device, the volume of the energy storage device can be reduced and the service life of the energy storage device can be increased.

[0007] According to some embodiments of the utility model, an opening is formed on the shell, and in the second direction, at least a portion of the monitoring module is opposite to the opening, the first direction is perpendicular to the second direction, and a removable cover is provided at the opening.

[0008] According to some embodiments of the present invention, the battery module includes a first battery sub-module and a second battery sub-module, and the monitoring module is connected between the first battery sub-module and the second battery sub-module.

[0009] According to some embodiments of the utility model, the first battery sub-module and the second battery sub-module are arranged along a first direction, and the first battery sub-module and the second battery sub-module extend along the second direction; a fixing member is connected between the first battery sub-module and the second battery sub-module, and the fixing member is located on one side of the battery sub-module along the second direction, and the monitoring module is arranged on a side of the fixing member away from the battery module.

[0010] According to some embodiments of the present utility model, the monitoring module has a mounting position, and a fastener passes through the mounting position and is connected to the fixing member.

[0011] According to some embodiments of the present invention, the battery pack further includes: a monitoring harness, one end of which is connected to the monitoring module, and the other end of which is disposed on the cover plate and connected to the controller.

[0012] According to some embodiments of the present invention, the first battery submodule and the second battery submodule include a plurality of battery cell modules, the plurality of battery cell modules are arranged along a third direction, the fixing member is connected to at least two adjacent battery cell modules, and the third direction, the first direction and the second direction are orthogonal.

[0013] According to some embodiments of the present invention, the battery pack further includes: an explosion-proof valve, wherein the explosion-proof valve is disposed on the shell.

[0014] According to some embodiments of the present invention, the explosion-proof valve and the fire sprinkler are located on the same side of the housing in the second direction, and the explosion-proof valve and the fire sprinkler are arranged on both sides of the opening along the first direction.

[0015] According to some embodiments of the present invention, the battery pack further includes: a collection module, the collection module is disposed on the cover plate, the collection module and the monitoring module are arranged along the third direction, and the collection module is connected to the controller.

[0016] According to some embodiments of the present invention, the collection module is detachably arranged in the middle of the cover plate.

[0017] According to some embodiments of the present invention, the monitoring module includes at least one of a temperature sensor, a VOC sensor, a CO sensor and a smoke sensor.

[0018] According to some embodiments of the present utility model, the controller includes a battery management system, and the battery management system is arranged in the accommodating cavity and connected to the monitoring module.

[0019] The energy storage device according to the second aspect of the utility model is characterized in that it includes: at least one battery pack, which is the battery pack according to the first aspect of the utility model; and an external storage tank, which is connected to the fire sprinkler of the battery pack.

[0020] According to some embodiments of the utility model, there are multiple battery packs, and the multiple fire sprinklers of the multiple battery packs are all connected to the same external storage tank.

[0021] According to some embodiments of the present invention, the energy storage device further includes: a controller, wherein the controller is connected to a plurality of monitoring modules of a plurality of the battery packs.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is an exploded view of a battery pack according to an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 A side view of the battery pack shown in;

[0026] Figure 3 yes Figure 1 A side view of the battery pack shown in , wherein the cover plate is not shown;

[0027] Figure 4 is a schematic diagram of a battery module of a battery pack according to an embodiment of the utility model;

[0028] Figure 5 is a schematic diagram of a monitoring module of a battery pack according to an embodiment of the utility model;

[0029] Figure 6 is a schematic diagram of a fire sprinkler of a battery pack according to an embodiment of the utility model;

[0030] Figure 7 It is a schematic diagram of a monitoring harness for a battery pack according to an embodiment of the utility model.

[0031] Reference numerals:

[0032] 100: battery pack;

[0033] 1: Shell; 11: Accommodating cavity; 12: Opening; 13: Upper cover; 131: Recess; 14: Base; 141: First connecting section; 142: Second connecting section; 2: Battery module; 21: First battery submodule; 22: Second battery submodule; 23: Cell module; 3: Monitoring module; 31: Mounting position; 4: Fire sprinkler; 41: Fire passage; 5: Fixing piece; 6: Cover plate; 61: Handle; 7: Fastener; 8: Monitoring harness; 9: Explosion-proof valve. DETAILED DESCRIPTION

[0034] Reference below Figure 1-Figure 7 A battery pack 100 according to an embodiment of the first aspect of the present invention is described.

[0035] like Figure 1-Figure 7 As shown, the battery pack 100 according to the first embodiment of the utility model includes a shell 1, a battery module 2, a monitoring module 3 and a fire sprinkler 4.

[0036] Specifically, the housing 1 has a receiving chamber 11, and the battery module 2 is disposed in the receiving chamber 11. The monitoring module 3 is disposed on the battery module 2, and is used to monitor the battery module 2. The fire sprinkler 4 is disposed on the housing 1, and is used to connect the receiving chamber 11 and an external storage tank for storing firefighting materials. Among them, the monitoring module 3 is suitable for transmitting an abnormal signal to the controller, and the controller controls the firefighting materials in the external storage tank to be sprayed into the receiving chamber 11 through the fire sprinkler 4.

[0037] For example, in Figure 1-Figure 6 In the example, the housing 1 includes an upper cover 13 and a base 14, and the upper cover 13 and the base 14 together define a accommodating chamber 11. A groove 131 is formed on one side surface of the upper cover 13 in the length direction, and the base 14 includes a first connecting section 141 and a second connecting section 142 connected to each other, and the second connecting section 142 is perpendicular to the first connecting section 141, and the second connecting section 142 is located on one side of the length direction of the first connecting section 141. The battery module 2 can be fixed on the first connecting section 141, the upper cover 13 is arranged on the battery module 2, and the second connecting section 142 is matched in the groove 131. The monitoring module 3 can be arranged in the length direction of the battery module 2 (for example, Figure 1 On one side (in the left and right direction), the fire sprinkler 4 is arranged on the second connecting section 142 of the base 14, and the fire sprinkler 4 has a fire passage 41, one end of the fire passage 41 is connected to the accommodating chamber 11, and the other end of the fire passage 41 is connected to the external storage tank.

[0038] When thermal runaway occurs in the battery module 2, the temperature of the battery module 2 will rise sharply, and the battery module 2 will release a large amount of CO and other gases. At this time, the monitoring module 3 can detect that the temperature of the battery module 2 rises sharply and the concentration of CO and other gases increases. The monitoring module 3 will transmit the abnormal signal to the controller. After receiving the abnormal signal, the controller will issue a corresponding instruction to control the external storage tank to open, so that the fire-fighting material in the external storage tank enters the accommodating cavity 11 through the fire-fighting nozzle 4, so as to extinguish the battery module 2 and improve the safety of the battery pack 100.

[0039] It should be noted that the monitoring module 3 can output different abnormal signals according to the specific circumstances when the battery module 2 thermally runs away, so as to realize strong and weak graded alarms. The controller can control the opening degree of the external storage tank (for example, the opening angle of the ball valve of the external storage tank) according to different abnormal signals, that is, control the flow rate of the fire-fighting material delivered to the accommodating chamber 11 to avoid excessive waste of the fire-fighting material.

[0040] Among them, the external storage tank is located outside the shell 1, and only the battery module 2 is arranged inside the shell 1, so that the size of the battery pack 100 can be reduced, which is conducive to the miniaturized design of the battery pack 100. The monitoring module 3 can accurately monitor whether the battery module 2 has thermal runaway. At the same time, there is no fire protection device on the shell 1, so that the surface of the shell 1 is regular and the structure is simple. When the battery pack 100 is applied to the energy storage device, the battery pack 100 can be compactly stacked, which is conducive to the miniaturized design of the energy storage device. When the thermal runaway of the battery module 2 causes the temperature of the surrounding battery modules 2 to rise, since the monitoring module 3 is arranged on the battery module 2, the monitoring module 3 can accurately determine whether the battery module 2 with the increased temperature has thermal runaway, avoiding fire protection of the normal battery module 2 and causing it to be damaged, thereby improving the service life of the energy storage device.

[0041] According to the battery pack 100 of the embodiment of the utility model, by setting the monitoring module 3 on the battery module 2, and the monitoring module 3 can transmit the abnormal signal to the controller, the controller controls the external storage tank to transport the fire-fighting material into the accommodating cavity 11 when the battery module 2 is in thermal runaway. Therefore, it is possible to accurately determine whether the battery pack 100 has thermal runaway. When the battery pack 100 is applied to the energy storage device, since the outer surface of the battery pack 100 is regular, it is convenient for the battery pack 100 to be stacked, the volume of the energy storage device can be reduced, and the service life of the energy storage device can be increased.

[0042] According to some embodiments of the present invention, an opening 12 is formed on the housing 1, and in the second direction, at least a portion of the monitoring module 3 is opposite to the opening 12, the first direction is perpendicular to the second direction, and a detachable cover plate 6 is provided at the opening 12. Figure 1-Figure 3As shown, an opening 12 is formed on the base 14 of the housing 1, and the shape of the opening 12 is substantially rectangular. Part of the monitoring module 3 can be opposite to the opening 12 in the second direction (such as Figure 3 Alternatively, the entire monitoring module 3 is opposite to the opening 12 in the second direction (not shown). When the battery pack 100 needs to be repaired, the cover plate 6 can be removed to expose the opening 12. At this time, the operator can repair the monitoring module 3 through the opening 12, avoiding the operator's hand from being put into the battery module 2 and causing electric shock, thereby improving the safety of the battery pack 100.

[0043] Optionally, a handle 61 is provided on the side of the cover plate 6 away from the shell 1, and the operator can hold the handle 61 to remove the cover plate 6 from the shell 1, or hold the handle 61 to install the cover plate 6 on the shell 1, which improves the convenience during installation and removal.

[0044] According to some embodiments of the present invention, Figure 1 and Figure 4 As shown, the battery module 2 includes a first battery submodule 21 and a second battery submodule 22, and the monitoring module 3 is connected between the first battery submodule 21 and the second battery submodule 22. In this way, the space between the first battery submodule 21 and the second battery submodule 22 can be effectively utilized, making the structure of the battery pack 100 more compact and more conducive to the miniaturized design of the battery pack 100.

[0045] Further, refer to Figure 1 and Figure 4 The first battery submodule 21 and the second battery submodule 22 are arranged along a first direction (eg, Figure 1 The first battery submodule 21 and the second battery submodule 22 are arranged along a second direction (for example, Figure 1 A fixing member 5 is connected between the first battery submodule 21 and the second battery submodule 22. The fixing member 5 is located on one side of the battery submodule along the second direction. The monitoring module 3 is located on a side of the fixing member 5 away from the battery module 2.

[0046] like Figure 1 and Figure 4As shown, the first direction can be the width direction of the shell 1, and the second direction can be the length direction of the shell 1. The first battery submodule 21 and the second battery submodule 22 are spaced apart along the width direction of the shell 1, that is, the first battery submodule 21 and the second battery submodule 22 are arranged side by side. The fixing member 5 is arranged on a side surface in the length direction of the battery module 2, and the two ends of the fixing member 5 are respectively connected to the first battery submodule 21 and the second battery submodule 22 by fasteners 7 such as bolts to avoid the first battery submodule 21 and the second battery submodule 22 from being damaged due to relative movement. The two sides of the fixing member 5 in the thickness direction are the battery module 2 and the monitoring module 3, respectively, and the monitoring module 3 is connected to the fixing member 5. While fixing the monitoring module 3 to the battery module 2, it can avoid the battery module 2 from being damaged when the monitoring module 3 is installed, further improving the service life of the battery pack 100.

[0047] Furthermore, the monitoring module 3 has an installation position 31, and the fastener 7 passes through the installation position 31 and is connected to the fixing member 5. Figure 3 In the example, two mounting holes (ie, mounting positions 31) are formed on the fixing member 5, and two fasteners 7 are respectively passed through the two mounting holes and connected to the fixing member 5 to mount the monitoring module 3 on the fixing member 5. Thus, the stability of the position of the monitoring module 3 is ensured.

[0048] Furthermore, in the second direction, the installation position 31 is opposite to the opening 12. With such a configuration, during maintenance, the operator can directly see the two fasteners 7 through the opening 12, and the operator can remove the monitoring module 3 by removing the two fasteners 7. This prevents the operator from inserting his hands into the battery module 2 during maintenance or replacement, thereby preventing electric shock, making disassembly and installation more convenient and less dangerous; at the same time, more space is reserved at the opening 12 to prevent the monitoring module 3 from interfering with other components.

[0049] According to some specific embodiments of the present invention, Figure 3 and Figure 6 As shown, the battery pack 100 further includes a monitoring harness 8, one end of which is connected to the monitoring module 3, and the other end of which is arranged on the cover plate 6 and connected to the controller, thereby realizing signal transmission between the monitoring module 3 and the controller. With such arrangement, during maintenance, after removing the cover plate 6, the monitoring harness 8 can be directly removed from the cover plate 6, which is convenient for maintenance and reduces maintenance costs.

[0050] According to some embodiments of the present invention, the first battery submodule 21 and the second battery submodule 22 include a plurality of battery cell modules 23. In the description of the present invention, "plurality" means two or more than two. The plurality of battery cell modules 23 are arranged along a third direction (e.g., Figure 1The fixing member 5 is connected to at least two adjacent battery modules 23, and the third direction, the first direction and the second direction are orthogonal. Figure 1 and Figure 4 As shown, the first battery submodule 21 and the second battery submodule 22 each include three battery cell modules 23, and the three battery cell modules 23 are arranged along the third direction. There are two fixing members 5, and the fixing members 5 are connected to four adjacent battery cell modules 23. The two fixing members 5 can connect the six battery cell modules 23 into a battery module 2, thereby improving the installation stability of the battery cell modules 23.

[0051] Figure 1 Six battery cell modules 23 are shown for illustrative purposes, but after reading the technical solution of the present application, ordinary technicians can obviously understand that the solution can be applied to the technical solution of other numbers of battery cell modules 23, which also falls within the protection scope of the present utility model.

[0052] In addition, if Figure 2 and Figure 3 As shown, the battery pack 100 further includes an explosion-proof valve 9, which is disposed on the housing 1. For example, the explosion-proof valve 9 can be disposed on the second connecting section 142 of the base 14. When the battery module 2 has thermal runaway, the pressure of the accommodating chamber 11 will be increased, and the injection of fire-fighting substances will also cause the pressure of the accommodating chamber 11 to increase. Therefore, the explosion-proof valve 9 will be opened after the battery module 2 has thermal runaway. First, the pressure of the accommodating chamber 11 can be balanced; second, the fire-fighting substances in the accommodating chamber 11 can be better circulated, and the battery module 2 can be quickly extinguished; third, the high-temperature combustible gas in the accommodating chamber 11 can be discharged to prevent the thermal runaway from spreading and reducing the temperature of the battery pack 100.

[0053] Furthermore, if Figure 2 and Figure 3 As shown, the explosion-proof valve 9 and the fire sprinkler 4 are located on the same side of the housing 1 in the second direction, and the explosion-proof valve 9 and the fire sprinkler 4 are arranged on both sides of the opening 12 along the first direction. In this way, the explosion-proof valve 9 and the fire sprinkler 4 can be separated to prevent the explosion-proof valve 9 from affecting the entry of fire-fighting materials after it is opened, and at the same time, the fire-fighting materials can be prevented from being discharged from the explosion-proof valve 9, so that the battery pack 100 can be quickly extinguished.

[0054] According to some embodiments of the present invention, the battery pack 100 further includes a collection module (not shown), which is disposed on the cover plate 6, and the collection module and the monitoring module 3 are arranged along the third direction, and the collection module is connected to the controller. The collection module can collect information such as the current, voltage, and temperature of the battery module 2, and can transmit the collected information to the controller, which can record the information of the battery module 2, so that the user can understand the usage status of the battery pack 100.

[0055] Optionally, the collection module is detachably arranged in the middle of the cover plate 6 to facilitate disassembly and installation.

[0056] Alternatively, if Figure 5 As shown, the monitoring module 3 includes at least one of a temperature sensor, a VOC sensor, a CO sensor, and a smoke sensor. Among them, the monitoring module 3 includes one of the temperature sensor, the VOC sensor, the CO sensor, and the smoke sensor; or, the monitoring module 3 includes any two of the temperature sensor, the VOC sensor, the CO sensor, and the smoke sensor; or, the monitoring module 3 includes any three of the temperature sensor, the VOC sensor, the CO sensor, and the smoke sensor; or, the monitoring module 3 includes a temperature sensor, a VOC sensor, a CO sensor, and a smoke sensor. Thus, the monitoring module 3 can realize the monitoring of various conditions of the thermal runaway battery module 2, making the abnormal signal detected more accurately, thereby further improving the accuracy of whether the battery module 2 is in thermal runaway.

[0057] The VOC sensor is used to detect the concentration of organic compounds in the containing chamber 11 ; and the CO sensor is used to detect the concentration of CO in the containing chamber 11 .

[0058] In some optional embodiments, the controller can include a battery management system (BMS), which is disposed in the accommodating cavity 11 and connected to the monitoring module 3. For example, the battery management system is electrically connected to the monitoring module 3, and the battery management system is communicatively connected to the monitoring module 3.

[0059] The energy storage device according to the second embodiment of the utility model comprises at least one battery pack 100 and an external storage tank, wherein the battery pack 100 is the battery pack 100 according to the first embodiment of the utility model. The external storage tank is connected to the fire sprinkler 4 of the battery pack 100.

[0060] According to the energy storage device of the embodiment of the utility model, by adopting the above-mentioned battery pack 100, the energy storage device realizes integrated functions such as monitoring, alarm, and fire protection, improves the market competitiveness of the energy storage device, and at the same time can reduce the volume of the energy storage device and increase the service life of the energy storage device.

[0061] According to some embodiments of the present invention, there are multiple battery packs 100, and multiple fire sprinklers 4 of multiple battery packs 100 are all connected to the same external storage tank. This arrangement can reduce the number of internal and external storage tanks in the energy storage device, and further reduce the volume of the energy storage device.

[0062] In addition, multiple battery packs 100 can be connected in series or in parallel. When a battery pack 100 experiences thermal runaway, the battery management system can accurately locate the location of the battery pack 100 in thermal runaway through the abnormal signal of the monitoring module 3, and control the external storage tank to open and transport firefighting materials into the battery pack 100 for firefighting. It should be noted that the battery management system can store the abnormal signal of the battery pack 100 in thermal runaway for the user to view.

[0063] Furthermore, the energy storage device further includes a controller, which is connected to multiple monitoring modules 3 of multiple battery packs 100. In other words, the controller can simultaneously control multiple battery packs 100. Thus, the number of controllers can be reduced, and the cost of the energy storage device can be reduced.

[0064] Other structures and operations of the storage device according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0065] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving cavity; A battery module, wherein the battery module is arranged in the accommodating cavity; A monitoring module, which is arranged on the battery module and is used to monitor the battery module; A fire sprinkler, the fire sprinkler being arranged on the housing and used for connecting the containing cavity and an external storage tank storing fire-fighting substances; Wherein, the monitoring module is suitable for transmitting abnormal signals to the controller, and the controller controls the fire-fighting material in the external storage tank to be sprayed toward the containing cavity through the fire-fighting nozzle.

2. The battery pack according to claim 1, characterized in that: An opening is formed on the housing, and at least a portion of the monitoring module is opposite to the opening in the second direction. The opening is provided with a detachable cover plate.

3. The battery pack according to claim 2, characterized in that: The battery module includes a first battery submodule and a second battery submodule, and the monitoring module is connected between the first battery submodule and the second battery submodule.

4. The battery pack according to claim 3, characterized in that: The first battery submodule and the second battery submodule are arranged along a first direction, the first battery submodule and the second battery submodule extend along the second direction, and the first direction is perpendicular to the second direction; A fixing member is connected between the first battery submodule and the second battery submodule. The fixing member is located on one side of the battery submodule along the second direction. The monitoring module is arranged on a side of the fixing member away from the battery module.

5. The battery pack according to claim 4, characterized in that: The monitoring module has an installation position, and a fastener passes through the installation position and is connected to the fixing member.

6. The battery pack according to claim 2, characterized in that: Also includes: A monitoring harness, one end of which is connected to the monitoring module, and the other end of which is arranged on the cover plate and connected to the controller.

7. The battery pack according to claim 4, characterized in that: The first battery submodule and the second battery submodule include a plurality of battery cell modules arranged along a third direction, the fixing member is connected to at least two adjacent battery cell modules, and the third direction, the first direction and the second direction are orthogonal.

8. The battery pack according to claim 2, characterized in that: Also includes: An explosion-proof valve is arranged on the shell.

9. The battery pack according to claim 8, characterized in that: The explosion-proof valve and the fire sprinkler are located on the same side of the housing in the second direction, and the explosion-proof valve and the fire sprinkler are arranged on both sides of the opening along a first direction, and the first direction is perpendicular to the second direction.

10. The battery pack according to claim 7, characterized in that: Also includes: A collection module, wherein the collection module is disposed on the cover plate, the collection module and the monitoring module are arranged along the third direction, and the collection module is connected to the controller.

11. The battery pack according to claim 10, characterized in that: The collection module is detachably arranged in the middle of the cover plate.

12. The battery pack according to any one of claims 1 to 11, characterized in that: The monitoring module includes at least one of a temperature sensor, a VOC sensor, a CO sensor and a smoke sensor.

13. The battery pack according to any one of claims 1 to 11, characterized in that: The controller includes a battery management system, and the battery management system is arranged in the accommodating cavity and connected to the monitoring module.

14. An energy storage device, characterized in that: include: At least one battery pack, wherein the battery pack is a battery pack according to any one of claims 1 to 13; An external storage tank is connected to the fire sprinkler of the battery pack.

15. The energy storage device according to claim 14, characterized in that: There are multiple battery packs, and the multiple fire sprinklers of the multiple battery packs are all connected to the same external storage tank.

16. The energy storage device according to claim 15, characterized in that: Also includes: A controller is connected to multiple monitoring modules of multiple battery packs.

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