Battery pack, energy storage system and electric device
By combining built-in and external fire extinguishing components, the problem of the single triggering condition of the battery pack fire extinguishing structure is solved, enabling sensitive response and efficient fire extinguishing for minor and critical fires, and improving the safety performance of the battery pack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EVE ENERGY CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-26
AI Technical Summary
The fire extinguishing mechanism of the battery pack has a single and stringent triggering condition, resulting in low safety performance.
It employs both built-in and external fire extinguishing components. The built-in fire extinguishing component is used for minor fires, while the external fire extinguishing component is used for critical fires. Both are triggered by detection components. The built-in fire extinguishing component includes a first fire extinguisher and a detector, while the external fire extinguishing component includes a second fire extinguisher and a fire sprinkler.
The battery pack has improved trigger sensitivity and safety performance, enabling it to actively suppress fire in its early stages, prevent chain reactions, and enhance fire extinguishing effectiveness.
Smart Images
Figure CN224417875U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery pack, energy storage system and electrical equipment. Background Technology
[0002] In battery pack management, thermal runaway of battery cells is one of the potential safety hazards, which may lead to fire or even explosion, seriously affecting the safety performance of the battery pack.
[0003] In related technologies, although battery packs are equipped with corresponding fire extinguishing structures, the fire extinguishing triggering conditions are singular and quite demanding, resulting in low safety performance of the battery packs. Utility Model Content
[0004] This application provides a battery pack, energy storage system, and electrical equipment that can solve the problem that the fire extinguishing structure of the battery pack has a single and relatively harsh triggering condition, resulting in low safety performance of the battery pack.
[0005] The technical solution is as follows:
[0006] On the one hand, a battery pack is provided, the battery pack including: a housing, multiple battery modules, a built-in fire extinguishing component and an external fire extinguishing component;
[0007] The plurality of battery modules are located inside the housing;
[0008] The built-in fire extinguishing assembly includes a first fire extinguisher storing a first fire extinguishing medium, the first fire extinguisher being located inside the housing; the external fire extinguishing assembly includes a second fire extinguisher storing a second fire extinguishing medium, the second fire extinguisher being located outside the housing and connected to the housing.
[0009] In some embodiments, the battery pack further includes a detection component for detecting whether a fire has occurred in the plurality of battery modules;
[0010] The detection component is electrically connected to both the built-in fire extinguishing component and the external fire extinguishing component.
[0011] In some embodiments, the detection component includes at least one first detector and at least one second detector;
[0012] The at least one first detector is electrically connected to the built-in fire extinguishing component, and the at least one first detector is used to detect whether there is a minor fire in the plurality of battery modules;
[0013] The at least one second detector is electrically connected to the external fire extinguishing component, and the at least one second detector is used to detect whether there is a critical fire in the plurality of battery modules.
[0014] In some embodiments, the first fire extinguisher is electrically connected to the at least one first detector, and the first fire extinguisher is used to release the first extinguishing medium into the container when a minor fire occurs.
[0015] In some embodiments, the first extinguishing medium is at least one of aerosol, perfluorohexanone, and heptafluoropropane.
[0016] In some embodiments, the external fire extinguishing assembly further includes a fire sprinkler head located on the housing and connected to the second fire extinguisher. The at least one second detector is electrically connected to the fire sprinkler head, and the fire sprinkler head is used to activate in the event of a severe fire to spray the second fire extinguishing medium into the housing.
[0017] In some embodiments, the first detector includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a barometric pressure sensor;
[0018] And / or,
[0019] The second detector includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a pressure sensor.
[0020] In some embodiments, the battery pack further includes a battery management unit and a high-voltage connection harness, at least one of which is arranged adjacent to the built-in fire suppression assembly.
[0021] In some embodiments, the first extinguishing medium is an aerosol, which is used to wrap and protect at least one of the battery management unit and the high-voltage connection harness.
[0022] On the other hand, an energy storage system is provided, the energy storage system including the battery pack described in any one of the present applications.
[0023] On the other hand, an electrical device is provided, the electrical device including the battery pack described in any one of the present applications.
[0024] The beneficial effects of the technical solution provided in this application include at least the following:
[0025] The battery pack of this application, in addition to housing multiple battery modules inside the casing, also houses a built-in fire extinguishing system, while an external fire extinguishing system is connected to the outside of the casing. When a battery module inside the casing experiences thermal runaway, for minor fires, the first fire extinguisher of the built-in fire extinguishing system releases a first extinguishing medium for active and rapid fire suppression. This allows for proactive suppression in the early stages of a fire, preventing a chain reaction among the battery modules and controlling the fire within the casing. The external fire extinguishing system, located outside the casing, is not limited by the internal space and can use a larger second fire extinguisher to store more second extinguishing medium, resulting in a stronger fire extinguishing effect. Once the fire escalates to a critical fire, the second fire extinguisher is activated. Utilizing both the built-in and external fire extinguishing systems to extinguish minor and critical fires respectively improves the trigger sensitivity of the battery pack and enhances its safety performance. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the battery pack structure provided in the embodiments of this application;
[0028] Figure 2 This is a schematic diagram of the internal structure of the battery pack provided in an embodiment of this application;
[0029] Figure 3 This is a schematic diagram of the connection of the detection component provided in the embodiments of this application;
[0030] Figure 4 This is a schematic diagram of the built-in fire extinguishing component provided in the embodiments of this application.
[0031] The reference numerals in the figure are respectively:
[0032] 1. Box body;
[0033] 11. Connection port; 12. Support end plate;
[0034] 2. Battery module;
[0035] 3. Built-in fire extinguishing components;
[0036] 31. First fire extinguisher;
[0037] 4. External fire suppression system;
[0038] 41. Second fire extinguisher; 42. Fire sprinkler head;
[0039] 5. Detection components;
[0040] 51. First detector; 52. Second detector;
[0041] 6. Battery Management Unit;
[0042] 7. High-voltage connection harness. Detailed Implementation
[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0044] In the description of this application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0045] It should be understood that in this application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and are not a connection relationship that limits the product structure. "Connection" and "connected" can both refer to a mechanical or physical connection relationship, that is, A and B being connected or connected can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.
[0046] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.
[0047] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0048] On the one hand, combined with Figure 1 and Figure 2 As shown, this embodiment provides a battery pack, which includes: a housing 1, multiple battery modules 2, a built-in fire extinguishing component 3, and an external fire extinguishing component 4.
[0049] Multiple battery modules 2 are located inside the housing 1; the built-in fire extinguishing assembly 3 includes a first fire extinguisher 31 storing a first fire extinguishing medium, the first fire extinguisher 31 being located inside the housing 1; the external fire extinguishing assembly 4 includes a second fire extinguisher 41 storing a second fire extinguishing medium, the second fire extinguisher 41 being located outside the housing 1 and connected to the housing 1.
[0050] In this embodiment, the battery pack housing 1 contains multiple battery modules 2 and a built-in fire extinguishing component 3. An external fire extinguishing component 4 is connected to the outside of the housing 1. When the battery modules 2 inside the housing 1 experience thermal runaway, for minor fires, the first fire extinguisher 31 of the built-in fire extinguishing component 3 releases the first extinguishing medium for active and rapid fire suppression. This can actively suppress the fire in its early stages, preventing a chain reaction in the battery modules 2 and controlling the fire within the housing 1. The external fire extinguishing component 4 is located outside the housing 1 and is not limited by the internal space of the housing 1. It uses a larger second fire extinguisher 41 to store more second extinguishing medium, resulting in a stronger fire extinguishing effect. Once the fire develops into a critical fire, the external fire extinguishing component 4 will be activated.
[0051] The use of built-in fire extinguishing component 3 and external fire extinguishing component 4 to extinguish minor and severe fires respectively helps to improve the triggering sensitivity of the battery pack and enhance its safety performance.
[0052] In the early stages of thermal runaway in battery module 2, the fire is usually minor. The built-in fire extinguishing component 3 has a certain probability of confining the fire within the battery module 2 where thermal runaway has occurred, thereby preventing the thermal runaway from spreading to the surrounding battery modules 2 and causing a chain reaction of thermal runaway.
[0053] In addition, for battery packs used in passenger vehicles, the built-in fire extinguishing component 3 can effectively prolong the time it takes for a fire to spread, significantly increasing the chances of occupants escaping.
[0054] Combination Figure 3 As shown, in some embodiments, the battery pack also includes a detection component 5, which is used to detect whether a fire has occurred in the multiple battery modules 2.
[0055] The detection component 5 is electrically connected to the built-in fire extinguishing component 3 and the external fire extinguishing component 4, respectively.
[0056] With the above arrangement, the built-in fire extinguishing component 3 and the external fire extinguishing component 4 can actively and quickly respond when a corresponding fire occurs in the battery module 2, based on the detection results of the detection component 5. This helps to improve the triggering sensitivity of the battery pack and enhance its safety performance.
[0057] In some possible implementations, the detection component 5 detects signals such as temperature, pressure, and current of a single battery module 2 and determines whether the signals exceed the corresponding safety thresholds. Once the signals exceed the corresponding safety thresholds, it determines that a fire has occurred in the battery module 2. Alternatively, the detection component 5 can determine whether a fire has occurred inside the housing 1 by detecting whether signals such as temperature and pressure inside and outside the housing 1 exceed the corresponding safety thresholds, or by detecting whether smoke or electrolyte decomposition gases (such as carbon monoxide, carbon dioxide, hydrofluoric acid, etc.) are present inside the housing 1.
[0058] For example, the detection component 5 can determine whether a fire is minor or severe based on the range of the signal exceeding the corresponding safety threshold. Taking temperature signals as an example, when the temperature exceeds the safety threshold but is less than 150% of the safety threshold, it can be determined to be a minor fire; when the temperature exceeds the safety threshold and is greater than 150% of the safety threshold, it can be determined to be a severe fire.
[0059] Combination Figure 3 As shown, in some embodiments, the detection component 5 includes at least one first detector 51 and at least one second detector 52.
[0060] At least one first detector 51 is electrically connected to the built-in fire extinguishing component 3, and the at least one first detector 51 is used to detect whether there is a minor fire in the multiple battery modules 2; at least one second detector 52 is electrically connected to the external fire extinguishing component 4, and the at least one second detector 52 is used to detect whether there is a critical fire in the multiple battery modules 2.
[0061] In this embodiment, in order to accurately distinguish between minor fires and critical fires and further improve the triggering accuracy of the built-in fire extinguishing component 3 and the external fire extinguishing component 4, different detectors are configured for the built-in fire extinguishing component 3 and the external fire extinguishing component 4. Different detectors can be selected according to the characteristics of minor fires and critical fires. Similarly, the first detector 51 and the second detector 52 can be arranged at different positions in the battery pack.
[0062] For example, the first detector 51 corresponding to the built-in fire extinguishing component 3 needs to detect minor fires in a timely manner. Therefore, the first detector 51 is arranged on the battery module 2 or inside the battery module 2 so that it can detect the fire in the early stages of thermal runaway in the battery module 2. For example, the first detector 51 is arranged at the rear of the battery pack so that it can detect the fire at the rear of the battery pack in a timely manner.
[0063] In another example, the second detector 52 corresponding to the external fire extinguishing component 4 is for critical fire situations. The second detector 52 can be arranged at a position slightly away from the battery module 2, such as the side wall of the housing 1, the gap between the battery modules 2, or the outside of the housing 1.
[0064] Combination Figure 3 and Figure 4 As shown, in some embodiments, the built-in fire extinguishing component 3 includes a first fire extinguisher 31, which stores a first fire extinguishing medium. The first fire extinguisher 31 is electrically connected to at least one first detector 51. The first fire extinguisher 31 is used to release the first fire extinguishing medium into the housing 1 when a minor fire occurs.
[0065] With the above arrangement, the first fire extinguisher 31 is built into the housing 1 and electrically connected to the first detector 51. When the first detector 51 detects a minor fire in the battery module 2, the first fire extinguisher 31 is activated, releasing the first extinguishing medium stored inside into the housing 1 to extinguish the fire and protect the other battery modules 2 and electrical components of the battery pack.
[0066] In some possible implementations, the first fire extinguisher 31 is a pressure vessel. The first extinguishing medium is compressed at a high pressure and stored in the first fire extinguisher 31. After the first detector 51 determines that a minor fire has occurred, it can output an opening command to the first fire extinguisher 31. The outlet of the first fire extinguisher 31 opens, and the first extinguishing medium is sprayed outward under its own pressure and fills the container 1 at a relatively fast speed.
[0067] In some embodiments, the first extinguishing medium is at least one selected from aerosol, perfluorohexanone, and heptafluoropropane. The aerosol, such as S-type thermal aerosol, has high permeability and can penetrate deep into the gaps of the battery module 2 to extinguish internal smoldering. Perfluorohexanone has good environmental friendliness, a high extinguishing concentration, insulating properties, and rapid evaporation, thus preventing secondary short circuits. Heptafluoropropane has high extinguishing efficiency, leaves no residue, and does not damage electronic components.
[0068] Combination Figure 2 and Figure 3 As shown, in some embodiments, the external fire extinguishing assembly 4 includes a second fire extinguisher 41 and a fire sprinkler head 42. The second fire extinguisher 41 stores a second fire extinguishing medium. The fire sprinkler head 42 is located on the housing 1 and connected to the second fire extinguisher 41. At least one second detector 52 is electrically connected to the fire sprinkler head 42. The fire sprinkler head 42 is used to conduct when a critical fire occurs, so as to spray the second fire extinguishing medium into the housing 1.
[0069] With the above arrangement, the second fire extinguisher 41 is placed outside the housing 1, which is not limited by the size of the housing 1 and can be arranged with a larger volume to store a sufficient amount of the second extinguishing medium. The on and off of the second fire extinguisher 41 is controlled by the fire sprinkler head 42. The structure is simple and the reliability is higher. The fire sprinkler head 42 is electrically connected to the second detector 52. When the second detector 52 detects a critical fire in the battery module 2, the fire sprinkler head 42 is activated, releasing the second extinguishing medium stored in the second fire extinguisher 41 into the housing 1 to achieve the fire extinguishing effect and protect the other battery modules 2 and electrical components of the battery pack.
[0070] For example, the second extinguishing agent is perfluoroethyl ketone.
[0071] In some possible implementations, the fire sprinkler head 42 is arranged on the end plate of the housing 1 and close to the central axis of the battery pack, which facilitates the fire sprinkler head 42 to spray the second extinguishing medium evenly and quickly to all corners of the housing 1.
[0072] For example, the spray direction of the fire sprinkler head 42 has an empty area, which facilitates the spray range of the second extinguishing medium and the space for chemical chain reaction.
[0073] For example, the end plate of the housing 1 is also provided with multiple connection ports 11, which are used for electrical connection between the battery pack and an external power supply or electrical equipment. Furthermore, the positions of the fire sprinkler head 42 and the connection ports 11 need to avoid each other.
[0074] In some possible implementations, the external fire extinguishing assembly 4 also includes a condensate reservoir. After the second fire extinguishing medium in the second fire extinguisher 41 is sprayed out, the condensate reservoir is activated to spray condensate into the housing 1 to cool the inside of the battery pack.
[0075] In some embodiments, the first detector 51 includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a pressure sensor; and / or, the second detector 52 includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a pressure sensor.
[0076] Using the aforementioned sensors as the first detector 51 and the second detector 52, both can be used to detect fire in the battery module 2 inside the battery pack, thereby improving the triggering sensitivity of the battery pack and enhancing its safety performance.
[0077] For example, the first detector 51 includes a temperature sensor, which is a temperature sensing line.
[0078] Combination Figure 2As shown, in some embodiments, the battery pack also includes a battery management unit (BMU) 6 and a high-voltage connection harness 7, at least one of which is arranged adjacent to the built-in fire suppression assembly 3.
[0079] By arranging the built-in fire suppression components 3 around the battery management unit 6 and the high-voltage connection harness 7, the battery management unit 6 and the high-voltage connection harness 7 can be protected first in the event of a fire, preventing data loss and arcing of the high-voltage connection harness 7.
[0080] In some possible implementations, the battery management unit 6 includes a voltage acquisition circuit, a temperature sensor array, a passive balancing circuit, a communication interface, a microcontroller, etc. In some possible implementations, the high-voltage connection harness 7 includes high-voltage circuit components such as busbars.
[0081] Combination Figure 2 As shown, in some embodiments, the built-in fire extinguishing component 3 includes a first fire extinguisher 31, and the first fire extinguishing medium stored in the first fire extinguisher 31 is an aerosol, which is used to wrap and protect at least one of the battery management unit 6 and the high-voltage connection harness 7.
[0082] With the above arrangement, the first fire extinguisher 31 is placed around the battery management unit and the high-voltage connection harness. The first fire extinguisher 31 contains solid aerosol. When the first fire extinguisher 31 is activated, the aerosol can first wrap and protect the battery management unit 6 and the high-voltage connection harness 7, thereby preventing data loss and arcing of the high-voltage connection harness 7.
[0083] Among some possible implementations, refer to Figure 2 and Figure 4 As shown, the battery management unit 6, the high-voltage connection harness 7, and the first fire extinguisher 31 are arranged together in the front panel area of the housing 1, and the first fire extinguisher 31 is supported and fixed by the support end plate of the front panel area.
[0084] On the other hand, this embodiment provides an energy storage system, which includes the battery pack of this application, and the battery pack is used to store or provide electrical energy.
[0085] The energy storage device in this embodiment uses the battery pack of this application and has all the beneficial technical effects of all embodiments herein.
[0086] Some embodiments of this application provide an energy storage system including one or more battery clusters to enhance the voltage and capacity of the energy storage system, wherein multiple batteries are connected in series via a busbar to increase the voltage of the energy storage system.
[0087] Energy storage systems can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. An energy storage system can store electrical energy as needed and output it when appropriate. For example, an energy storage system can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage.
[0088] In some embodiments, the energy storage system is an energy storage container or an energy storage cabinet.
[0089] In some embodiments, the energy storage system may include a cabinet and one or more battery packs housed within the cabinet.
[0090] On the other hand, this embodiment provides an electrical device, which includes the battery pack or energy storage system of this application, wherein the battery pack is used to provide electrical energy.
[0091] The electrical device in this embodiment uses the battery pack of this application and has all the beneficial technical effects of all embodiments herein.
[0092] In this embodiment, the electrical device can be a vehicle, or a mobile phone, tablet, laptop, electric toy, power tool, electric vehicle, ship, spacecraft, etc.
[0093] It should be noted that, in the description of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0094] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0095] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this application.
[0096] The above description is merely an embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.
Claims
1. A battery pack, characterized in that, The battery pack includes: a housing (1), multiple battery modules (2), a built-in fire extinguishing assembly (3), and an external fire extinguishing assembly (4); The plurality of battery modules (2) are located inside the housing (1); The built-in fire extinguishing assembly (3) includes a first fire extinguisher (31) storing a first fire extinguishing medium, the first fire extinguisher (31) being located inside the housing (1); the external fire extinguishing assembly (4) includes a second fire extinguisher (41) storing a second fire extinguishing medium, the second fire extinguisher (41) being located outside the housing (1) and connected to the housing (1).
2. The battery pack according to claim 1, characterized in that, The battery pack also includes a detection component (5), which is used to detect whether there is a fire in the plurality of battery modules (2); The detection component (5) is electrically connected to the built-in fire extinguishing component (3) and the external fire extinguishing component (4), respectively.
3. The battery pack according to claim 2, characterized in that, The detection component (5) includes at least one first detector (51) and at least one second detector (52); The at least one first detector (51) is electrically connected to the built-in fire extinguishing component (3), and the at least one first detector (51) is used to detect whether there is a minor fire in the plurality of battery modules (2); The at least one second detector (52) is electrically connected to the external fire extinguishing component (4), and the at least one second detector (52) is used to detect whether there is a critical fire in the plurality of battery modules (2).
4. The battery pack according to claim 3, characterized in that, The first fire extinguisher (31) is electrically connected to at least one first detector (51), and the first fire extinguisher (31) is used to release the first fire extinguishing medium into the box (1) when a minor fire occurs.
5. The battery pack according to claim 4, characterized in that, The first extinguishing medium is at least one of aerosol, perfluorohexanone, and heptafluoropropane.
6. The battery pack according to claim 3, characterized in that, The external fire extinguishing assembly (4) also includes a fire sprinkler head (42), which is located on the housing (1) and connected to the second fire extinguisher (41). The at least one second detector (52) is electrically connected to the fire sprinkler head (42). The fire sprinkler head (42) is used to conduct when a critical fire occurs, so as to spray the second fire extinguishing medium into the housing (1).
7. The battery pack according to claim 3, characterized in that, The first detector (51) includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a pressure sensor; And / or, The second detector (52) includes at least one of a temperature sensor, a smoke sensor, a gas sensor, and a pressure sensor.
8. The battery pack according to any one of claims 1 to 7, characterized in that, The battery pack also includes a battery management unit (6) and a high-voltage connection harness (7), at least one of which is arranged adjacent to the built-in fire extinguishing assembly (3).
9. The battery pack according to claim 8, characterized in that, The first extinguishing medium is an aerosol, which is used to wrap and protect at least one of the battery management unit (6) and the high-voltage connection harness (7).
10. An energy storage system, characterized in that, The energy storage system includes the battery pack according to any one of claims 1 to 9.
11. An electrical appliance, characterized in that, The electrical equipment includes the battery pack according to any one of claims 1 to 9.