Battery pack, electric equipment and energy storage equipment

Abstract

The utility model provides a battery pack, electric equipment and energy storage equipment wherein the battery pack comprises: a pack body, the pack body is internally provided with an installation cavity suitable for installing a single battery, the pack body is provided with a first installation hole and a second installation hole, the first installation hole and the second installation hole are respectively communicated with the installation cavity; the first anti-explosion valve is arranged in the first mounting hole, the first anti-explosion valve is provided with a sensing unit, the sensing unit is suitable for being electrically connected with a fire extinguishing system, and the sensing unit is used for detecting the condition in the mounting cavity in real time; the nozzle is arranged in the second mounting hole, the first end of the nozzle is suitable for being connected with a fire-fighting pipeline of a fire-fighting system, and the second end of the nozzle communicates with the mounting cavity so as to spray a fire-fighting medium into the mounting cavity. According to the battery pack disclosed by the utility model, when any single battery is subjected to thermal runaway, the thermal runaway can be detected in time through the sensing unit on the first anti-explosion valve, so that the thermal runaway phenomenon can be inhibited in time, and the risk of fire and explosion of the battery pack can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery pack, an electrical device and an energy storage device. Background Art

[0002] During the use of the battery pack, the internal single cells will generate heat, and the single cells in the battery pack will inevitably have problems such as thermal runaway. In order to reduce the harm of thermal runaway and prevent the spread of thermal runaway, the entire battery pack needs to be treated for firefighting in the early stage of thermal runaway. In the existing technology, most of them are equipped with sensors in the battery pack. When thermal runaway occurs, the sensor detects the gas concentration or temperature generated by thermal runaway to trigger firefighting.

[0003] When a single cell experiences thermal runaway, it takes a certain amount of time for the gas or smoke to diffuse from the single cell to the entire package. The placement of the sensor will affect the detection of the signal. The existing sensors in the package cannot detect thermal runaway in local remote areas in the early stages of thermal runaway, resulting in a higher risk of fire and explosion in the battery pack. Utility Model Content

[0004] The first object of the utility model is to provide a new technical solution for a battery pack, which can at least solve the technical problem of high risk of fire and explosion in existing battery packs.

[0005] The second object of the utility model is to provide an electrical device including the above-mentioned battery pack.

[0006] The third object of the present utility model is to provide an energy storage device, including the above-mentioned battery pack.

[0007] According to a first aspect of the utility model, a battery pack is provided, comprising: a pack body, wherein a mounting cavity suitable for mounting a single cell is provided in the pack body, wherein a first mounting hole and a second mounting hole are provided in the pack body, wherein the first mounting hole and the second mounting hole are respectively connected to the mounting cavity; a first explosion-proof valve, wherein the first explosion-proof valve is arranged in the first mounting hole, wherein the first explosion-proof valve is provided with a sensor unit, wherein the sensor unit is suitable for being electrically connected to a fire protection system, and wherein the sensor unit is used for detecting the situation in the mounting cavity in real time; and a nozzle, wherein the nozzle is arranged in the second mounting hole, wherein a first end of the nozzle is suitable for being connected to a fire protection pipeline of a fire protection system, and a second end of the nozzle is connected to the mounting cavity so as to spray a fire protection medium into the mounting cavity.

[0008] Optionally, the installation cavity is formed as a cuboid, and the distance L between the second end of the nozzle and the first explosion-proof valve satisfies:

[0009]

[0010] Wherein, d is the length of the installation cavity, w is the width of the installation cavity, and h is the height of the installation cavity.

[0011] Optionally, the distance L between the second end of the nozzle and the first explosion-proof valve satisfies:

[0012]

[0013] Optionally, one inner wall surface of the installation cavity is used to support the single battery, and the remaining inner wall surfaces of the installation cavity are spaced apart from the single battery, so that a gap suitable for the flow of the fire-fighting medium is formed between the inner wall surface of the installation cavity and the single battery.

[0014] Optionally, the first mounting hole and the second mounting hole are located on different sides of the package body.

[0015] Optionally, at least part of the single battery is located between the first explosion-proof valve and the second end of the nozzle, so that the size of the flow path of the fire-fighting medium is larger than the distance L between the second end of the nozzle and the first explosion-proof valve.

[0016] Optionally, the sensing unit comprises: at least one of a gas sensor and a temperature sensor.

[0017] Optionally, the level of the first explosion-proof valve is lower than the level of the nozzle.

[0018] Optionally, the nozzle is formed as an air nozzle, and the air nozzle is used to spray firefighting gas into the installation cavity.

[0019] Optionally, a plurality of the single cells are arranged in the installation cavity, and a second explosion-proof valve is respectively arranged at one end of the plurality of the single cells, and the battery pack further comprises: a first fireproof plate, which is arranged in the installation cavity and covers a side of the plurality of the second explosion-proof valves away from the single cells; a second fireproof plate, which is arranged between two adjacent single cells, and / or a second fireproof plate is arranged between the single cells and a side wall of the installation cavity.

[0020] According to a second aspect of the utility model, there is provided an electrical device comprising the above-mentioned battery pack.

[0021] According to a third aspect of the utility model, there is provided an energy storage device, comprising the above-mentioned battery pack.

[0022] According to the battery pack of the utility model, by integrating the sensing unit on the first explosion-proof valve, when thermal runaway occurs in each single cell, the gas or smoke generated by the thermal runaway is discharged from the first explosion-proof valve, and when thermal runaway occurs in any single cell, it can be detected in time by the sensing unit on the first explosion-proof valve, so that the thermal runaway of each single cell can be discovered in time, and then the fire protection system can control the nozzle to spray the fire protection medium into the installation cavity to suppress the thermal runaway phenomenon in time, which can effectively reduce the risk of fire and explosion of the battery pack.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0026] Figure 2 It is a structural schematic diagram of a first explosion-proof valve of a battery pack according to an embodiment of the utility model at a viewing angle;

[0027] Figure 3 is a schematic structural diagram of a first explosion-proof valve of a battery pack according to an embodiment of the present utility model at another viewing angle;

[0028] Figure 4 It is a partial structural schematic diagram of a battery pack according to an embodiment of the present utility model;

[0029] Figure 5 is a three-dimensional diagram of a battery pack according to an embodiment of the present utility model without a top cover installed;

[0030] Figure 6 It is a cross-sectional view in one direction of a battery pack according to an embodiment of the present utility model when the top cover is not installed;

[0031] Figure 7 is a cross-sectional view in another direction of a battery pack according to an embodiment of the present invention when the top cover is not installed;

[0032] Figure 8 yes Figure 7 A magnified view of the structure in the middle.

[0033] Reference numerals

[0034] Battery pack 100;

[0035] Package body 10; first mounting hole 11; second mounting hole 12;

[0036] Side plate 13; bottom plate 14; top cover 15;

[0037] Single cell 20;

[0038] First explosion-proof valve 30; valve body 31; pressure relief hole 311; sensor unit 32;

[0039] Nozzle 40; first fireproof board 50; second fireproof board 60; thermal pad 70. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] The following first describes in detail the battery pack 100 according to the embodiment of the utility model with reference to the drawings.

[0046] like Figures 1 to 8 As shown, the battery pack 100 according to the embodiment of the present invention includes a pack body 10 , a first explosion-proof valve 30 and a nozzle 40 .

[0047] Specifically, an installation cavity suitable for installing a single battery 20 is provided in the package body 10, and a first installation hole 11 and a second installation hole 12 are provided in the package body 10, and the first installation hole 11 and the second installation hole 12 are respectively connected to the installation cavity, and a first explosion-proof valve 30 is provided in the first installation hole 11, and the first explosion-proof valve 30 is provided with a sensor unit 32, and the sensor unit 32 is suitable for being electrically connected to a fire protection system, and the sensor unit 32 is used for real-time detection of the situation in the installation cavity, and a nozzle 40 is provided in the second installation hole 12, and a first end of the nozzle 40 is suitable for being connected to a fire protection pipeline of the fire protection system, and a second end of the nozzle 40 is connected to the installation cavity to spray a fire protection medium into the installation cavity.

[0048] In other words, if Figures 1 to 8 As shown, the battery pack 100 according to the embodiment of the utility model mainly includes a packing body 10, a first explosion-proof valve 30, a nozzle 40 and a plurality of single cells 20, wherein a mounting cavity is provided in the packing body 10, and a plurality of single cells 20 are all arranged in the mounting cavity, and a first mounting hole 11 is provided in the packing body 10 to match the first explosion-proof valve 30, and the first explosion-proof valve 30 is fixed in the first mounting hole 11 to block the first mounting hole 11. When a single cell 20 has thermal runaway, the pressure in the packing body 10 can be released through the first explosion-proof valve 30, thereby effectively preventing the battery pack 100 from exploding.

[0049] like Figures 1 to 3 As shown, the first explosion-proof valve 30 is integrated with a sensor unit 32. Specifically, the first explosion-proof valve 30 includes a valve body 31 and a sensor unit 32. The sensor unit 32 can be fixed to the side of the valve body 31 facing the installation cavity by bonding or welding. The valve body 31 is provided with a plurality of pressure relief holes 311 suitable for pressure relief. The plurality of pressure relief holes 311 can surround the outer periphery of the sensor unit 32, so that the first explosion-proof valve 30 has a detection function, so that the first explosion-proof valve 30 can detect the situation in the installation cavity through the sensor unit 32. For example, the sensor unit 32 can detect the composition, concentration, temperature, etc. of the gas or smoke in the installation cavity. When thermal runaway occurs in one or more single cells 20, the gas or smoke generated by the thermal runaway is first discharged from the first explosion-proof valve 30, so there is no need to set up multiple sensors in the package 10. The thermal runaway of the single cell 20 can be detected in time by the sensor unit 32 of the first explosion-proof valve 30, thereby reducing the production cost of the battery pack 100 and reasonably utilizing the space of the package 10, thereby improving the space utilization rate of the package 10.

[0050] like Figures 1 to 5 As shown, the package body 10 is provided with a second mounting hole 12, the nozzle 40 is installed in the first mounting hole 11, the first end of the nozzle 40 is located on the outside of the package body 10 and connected to the fire fighting pipeline of the fire fighting system, and the second end of the nozzle 40 is located on the inside of the package body 10 and connected to the mounting cavity.

[0051] When in use, the sensor unit 32 of the first explosion-proof valve 30 is electrically connected to the fire protection system and can be powered by the fire protection system. The sensor unit 32 can detect the situation in the installation cavity in real time and send the detection result to the fire protection system. When the sensor unit 32 detects that the situation in the installation cavity reaches the set working condition, such as the concentration of gas or smoke reaches the set value, or the temperature reaches the set value, the fire protection system can control the fire protection pipeline to provide the nozzle 40 with a fire protection medium, and the fire protection medium can be sprayed from the second end of the nozzle 40 into the installation cavity to cool down the single battery 20 and extinguish the fire.

[0052] Therefore, according to the battery pack 100 provided in this embodiment, by integrating the sensor unit 32 on the first explosion-proof valve 30, when each single cell 20 has thermal runaway, the gas or smoke generated by the thermal runaway is discharged from the first explosion-proof valve 30, and when any single cell 20 has thermal runaway, it can be detected in time by the sensor unit 32 on the first explosion-proof valve 30, so that the thermal runaway of each single cell 20 can be discovered in time, and then the fire protection system controls the nozzle 40 to spray the fire protection medium into the installation cavity to suppress the thermal runaway phenomenon in time, which can effectively reduce the risk of fire and explosion of the battery pack 100.

[0053] In some examples of the present invention, the first end of the first explosion-proof valve faces the installation cavity, and the sensor unit 32 is disposed at the first end of the first explosion-proof valve.

[0054] In some specific embodiments of the present invention, the installation cavity is formed as a cuboid, and the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 satisfies:

[0055]

[0056] Wherein, d is the length of the installation cavity, w is the width of the installation cavity, and h is the height of the installation cavity.

[0057] That is to say, Figures 1 to 7 As shown, the package body 10 is roughly formed into a rectangular parallelepiped structure, and the installation cavity defined by the package body 10 is also roughly formed into a rectangular parallelepiped. The nozzle 40 and the first explosion-proof valve 30 can be arranged on the same side wall of the installation cavity, or on different side walls of the installation cavity.

[0058] In this embodiment, the fire-fighting medium sprayed out by the nozzle 40 is in an atomized form or a gas form. When the single battery 20 has a thermal runaway, the gas generated by the thermal runaway is sprayed out from the first explosion-proof valve 30. According to the Bernoulli principle, the pressure is small where the flow rate is large. The location of the first explosion-proof valve 30 will generate suction for the fire-fighting medium. In order to increase the coverage area of ​​the fire-fighting medium in the installation cavity, the distance between the nozzle 40 and the first explosion-proof valve 30 can be increased.

[0059] Based on this, the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 can be limited to the following range:

[0060]

[0061] That is to say, the arrangement positions of the nozzle 40 and the first explosion-proof valve 30 include but are not limited to the following situations:

[0062] Case 1: The nozzle 40 and the first explosion-proof valve 30 can be arranged on the side wall of the installation cavity extending along its length direction, and the nozzle 40 and the first explosion-proof valve 30 are arranged diagonally along the side wall, so that the nozzle 40 can be as far away from the first explosion-proof valve 30 as possible, and the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 can be made greater than the length d of the installation cavity, so that the fire-fighting medium will not be sprayed out of the first explosion-proof valve 30 too quickly after being sprayed out of the nozzle 40, thereby increasing the time and space for the fire-fighting medium to pass through the installation cavity, so that the fire-fighting medium can cover the single battery 20 in the entire installation cavity as much as possible, and can solve the technical problem of the small coverage area of ​​the fire-fighting medium.

[0063] Case 2: The nozzle 40 and the first explosion-proof valve 30 may be located at opposite corners of the installation cavity, so that the maximum distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 is:

[0064]

[0065] Thus, the time and space for the fire-fighting medium to pass through the installation cavity are further improved, so that the fire-fighting medium can cover the single battery 20 in the entire installation cavity as much as possible, which can improve the thermal runaway suppression effect.

[0066] According to one embodiment of the present invention, the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 satisfies:

[0067]

[0068] That is, the nozzle 40 and the first explosion-proof valve 30 may be arranged on different side walls of the installation cavity, so that the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 may not be less than the following value:

[0069]

[0070] Thus, the time and space for the fire-fighting medium to pass through the installation cavity are further improved, so that the fire-fighting medium can cover the single battery 20 in the entire installation cavity as much as possible, which can further improve the thermal runaway suppression effect.

[0071] In some specific embodiments of the present invention, an inner wall surface of the installation cavity is used to support the single battery 20, and the remaining inner wall surfaces of the installation cavity are spaced apart from the single battery 20, so that a gap suitable for the flow of fire-fighting medium is formed between the inner wall surface of the installation cavity and the single battery 20.

[0072] Specifically, Figures 1 to 5 As shown, the package body 10 mainly includes a bottom plate 14, a top cover 15 and a plurality of side plates 13. The bottom plate 14, the top cover 15 and the plurality of side plates 13 are connected to define a mounting cavity. The single cell 20 is placed on the bottom plate 14 to be supported by the bottom plate 14, and the single cell 20 is separated from each side plate 13 and the top cover 15 to form a gap, so that the fire-fighting medium can flow to different surfaces of the single cell 20 through the gap, thereby increasing the contact area between the fire-fighting medium and the single cell 20, so that the fire-fighting medium can cool down and extinguish the single cell 20 in multiple directions, which can effectively improve the suppression effect of thermal runaway.

[0073] According to an embodiment of the present invention, the first mounting hole 11 and the second mounting hole 12 are located on different sides of the package body 10 .

[0074] In this embodiment, if Figures 1 to 5 As shown, the first mounting hole 11 and the second mounting hole 12 can be arranged on different sides of the package body 10, so that different sides of the package body 10 can provide mounting positions with a large spacing for the first explosion-proof valve 30 and the nozzle 40. For example, the first mounting hole 11 and the second mounting hole 12 can be arranged at diagonal positions of the safety cavity, respectively, so that the distance between the second end of the nozzle 40 and the first explosion-proof valve 30 can reach a maximum value.

[0075] In some specific embodiments of the present invention, at least part of the single battery 20 is located between the first explosion-proof valve 30 and the second end of the nozzle 40 so that the flow path of the firefighting medium is larger than the distance L between the second end of the nozzle 40 and the first explosion-proof valve 30 .

[0076] Specifically, Figures 1 to 5 As shown, the first explosion-proof valve 30 and the nozzle 40 are located on different sides of the package body 10, and the connection line between the first explosion-proof valve 30 and the second end of the nozzle 40 passes through the single battery 20, so that at least part of the single battery 20 is located between the two, thereby increasing the distance of the flow path of the fire-fighting medium, and the fire-fighting medium sprayed from the second end of the nozzle 40 can impact on the single battery 20, and the fire-fighting medium impacting the single battery 20 is dispersed along the surface of the single battery 20, which is conducive to the fire-fighting medium quickly covering the surface of the single battery 20, and can effectively improve the suppression effect of thermal runaway.

[0077] According to an embodiment of the present invention, the sensing unit 32 includes: at least one of a gas sensor and a temperature sensor.

[0078] That is to say, the specific structure of the sensor unit 32 includes but is not limited to the following situations:

[0079] Case 1: the sensing unit 32 is a gas sensor, which is electrically connected to the fire protection system. The fire protection system can provide power to the gas sensor. The gas sensor can detect the concentration and composition of the thermal runaway gas or smoke, and send the detection results to the fire protection system.

[0080] Case 2: the sensing unit 32 is a temperature sensor, which is electrically connected to the fire protection system. The fire protection system can provide power to the temperature sensor. The temperature sensor detects the temperature of the thermal runaway gas and sends the detection result to the fire protection system.

[0081] In case three, the sensing unit 32 includes a gas sensor and a temperature sensor. When a detection result of one of the gas sensor and the temperature sensor reaches a set value, the fire protection system controls the fire protection pipeline to provide fire protection medium to the nozzle 40, thereby avoiding the problem of failure of a single sensor or untimely response.

[0082] In some specific implementations of the present invention, the level of the first explosion-proof valve 30 is lower than the level of the nozzle 40 .

[0083] Specifically, Figures 1 to 5 As shown, the horizontal height of the first mounting hole 11 is lower than the horizontal height of the second mounting hole 12, so that the horizontal height of the first explosion-proof valve 30 is lower than the horizontal height of the nozzle 40, so that after the fire-fighting medium enters the mounting cavity, it can flow out of the first explosion-proof valve 30 in time, which is beneficial to the renewal of the fire-fighting medium in the mounting cavity and can improve the suppression effect of thermal runaway.

[0084] According to an embodiment of the present invention, the nozzle 40 is formed as an air jet nozzle, which is used to spray firefighting gas into the installation cavity.

[0085] That is to say, the nozzle 40 can be a jet nozzle. When firefighting, firefighting gas can be sprayed into the installation cavity through the jet nozzle. Compared with firefighting liquid, the firefighting gas can quickly fill the installation cavity, thereby quickly covering the single battery 20, and can timely suppress thermal runaway.

[0086] In some specific embodiments of the present invention, a plurality of single cells 20 are provided in the installation cavity, and a second explosion-proof valve 21 is respectively provided at one end of the plurality of single cells 20. The battery pack 100 further includes: a first fireproof plate 50 and a second fireproof plate 60. The first fireproof plate 50 is provided in the installation cavity, and the first fireproof plate 50 covers the side of the plurality of second explosion-proof valves 21 away from the single cells 20. A second fireproof plate 60 is provided between two adjacent single cells 20, and / or a second fireproof plate 60 is provided between the single cells 20 and the side wall of the installation cavity.

[0087] In other words, if Figures 1 to 7 As shown, a plurality of battery modules are provided in the installation cavity, each battery module is composed of a plurality of single cells 20, the first end of the single cell 20 is in contact with the bottom plate 14, the second end of the single cell 20 is provided with a second explosion-proof valve 21, and a plurality of first fireproof plates 50 are provided in the installation cavity, the number of the first fireproof plates 50 may correspond to the number of the battery modules, and the first fireproof plates 50 are located between the second explosion-proof valve 21 and the top cover 15, so that the second explosion-proof valve 21 can be separated from the top cover 15 by the first fireproof plates 50.

[0088] like Figures 3 to 7 As shown, the first fireproof plate 50 can be a mica plate, which has the function of flame retardancy and heat insulation. When the second explosion-proof valve 21 of the single battery 20 is broken, the first fireproof plate 50 can resist high-temperature impact and will not directly damage the entire top cover 15. It can ensure that the concentration and temperature of the thermal runaway gas in the package 10 can be detected, so that the thermal runaway phenomenon can be suppressed in time; and it can more completely ensure the integrity of the entire battery pack 100, which is convenient for the subsequent analysis of the cause of the thermal runaway, thereby solving the problem that it is inconvenient to analyze the cause of the thermal runaway in the existing battery pack.

[0089] like Figures 3 to 8 As shown, a second fireproof board 60 is provided between two adjacent single cells 20 in each battery module. The second fireproof board 60 may be an aerogel fireproof board. The aerogel fireproof board also has flame retardant and heat insulating effects, and can prevent the thermal runaway of the single cell 20 in a single battery module from spreading to other single cells 20. In addition, the aerogel fireproof board has a certain amount of compression, so that the battery module will not occupy too much space in the package 10.

[0090] In some specific examples of the present invention, a second fireproof plate 60 is also provided between two adjacent battery modules, so as to prevent the thermal runaway of the single battery 20 in a single battery module from spreading to other battery modules.

[0091] like Figure 7 and Figure 8 As shown, in some optional examples of the present invention, a second fireproof plate 60 is provided between the single cell 20 and the side wall of the installation cavity, thereby preventing the single cell 20 from damaging the side wall of the entire battery pack 100 during thermal runaway, and can more completely ensure the integrity of the entire battery pack 100, facilitating subsequent analysis of the cause of thermal runaway.

[0092] like Figure 8 As shown, in one embodiment of the present invention, the bottom plate 14 is formed as a liquid cooling plate, and a thermal pad 70 is provided between the bottom plate 14 and the single battery 20 , so as to facilitate heat exchange between the single battery 20 and the bottom plate 14 .

[0093] An embodiment of the utility model further provides an electric device, which may be, but is not limited to, a vehicle. The electric device includes the battery pack 100 described in any of the above embodiments.

[0094] Since the battery pack 100 according to the embodiment of the utility model has the above-mentioned technical effects, the electrical equipment according to the embodiment of the utility model also has the corresponding technical effects, that is, the thermal runaway of each single battery 20 can be detected in time, so that the fire protection system can control the nozzle 40 to spray the fire protection medium into the installation cavity to suppress the thermal runaway phenomenon in time, which can effectively reduce the risk of fire and explosion of the battery pack 100, thereby improving the safety of the electrical equipment.

[0095] The embodiment of the utility model further provides an energy storage device, which may be, but is not limited to, an energy storage cabinet or an energy storage box, which is not limited in this embodiment. The energy storage device may include one or more battery packs 100 described in any of the above embodiments, which is not limited in this embodiment.

[0096] Since the battery pack 100 according to the embodiment of the utility model has the above-mentioned technical effects, the energy storage device according to the embodiment of the utility model also has the corresponding technical effects, that is, the thermal runaway of each single battery 20 can be detected in time, so that the fire protection system can control the nozzle 40 to spray the fire protection medium into the installation cavity to suppress the thermal runaway phenomenon in time, which can effectively reduce the risk of fire and explosion of the battery pack 100, thereby improving the safety of the energy storage device.

[0097] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A package body (10), wherein a mounting cavity suitable for mounting a single battery (20) is provided in the package body (10), and the package body (10) is provided with a first mounting hole (11) and a second mounting hole (12), wherein the first mounting hole (11) and the second mounting hole (12) are respectively connected to the mounting cavity; a first explosion-proof valve (30), the first explosion-proof valve (30) being arranged at the first mounting hole (11), the first explosion-proof valve (30) being provided with a sensor unit (32), the sensor unit (32) being suitable for being electrically connected to a fire protection system, and the sensor unit (32) being used for detecting the situation in the mounting cavity in real time; A nozzle (40), wherein the nozzle (40) is arranged in the second mounting hole (12), a first end of the nozzle (40) is suitable for being connected to a fire-fighting pipeline of a fire-fighting system, and a second end of the nozzle (40) is communicated with the mounting cavity so as to spray a fire-fighting medium into the mounting cavity.

2. The battery pack according to claim 1, characterized in that: The installation cavity is formed as a rectangular parallelepiped, and the distance L between the second end of the nozzle (40) and the first explosion-proof valve (30) satisfies: Wherein, d is the length of the installation cavity, w is the width of the installation cavity, and h is the height of the installation cavity.

3. The battery pack according to claim 2, characterized in that: The distance L between the second end of the nozzle (40) and the first explosion-proof valve (30) satisfies:

4. The battery pack according to claim 1, characterized in that: One inner wall surface of the installation cavity is used to support the single battery (20), and the remaining inner wall surfaces of the installation cavity are spaced apart from the single battery (20), so that a gap suitable for the flow of the fire-fighting medium is formed between the inner wall surface of the installation cavity and the single battery (20).

5. The battery pack according to claim 1, characterized in that: The first mounting hole (11) and the second mounting hole (12) are located on different sides of the package body (10).

6. The battery pack according to claim 5, characterized in that: At least part of the single cell (20) is located between the first explosion-proof valve (30) and the second end of the nozzle (40), so that the size of the flow path of the fire-fighting medium is greater than the distance L between the second end of the nozzle (40) and the first explosion-proof valve (30).

7. The battery pack according to claim 1, characterized in that: The sensing unit (32) comprises at least one of a gas sensor and a temperature sensor.

8. The battery pack according to claim 1, characterized in that: The level of the first explosion-proof valve (30) is lower than the level of the nozzle (40).

9. The battery pack according to claim 1, characterized in that: The nozzle (40) is formed as an air jet nozzle, and the air jet nozzle is used to spray firefighting gas into the installation cavity.

10. The battery pack according to claim 1, characterized in that: A plurality of the single cells (20) are arranged in the installation cavity, and a second explosion-proof valve (21) is respectively arranged at one end of the plurality of the single cells (20). The battery pack further comprises: A first fireproof plate (50), the first fireproof plate (50) being arranged in the installation cavity, and the first fireproof plate (50) covering a side of the plurality of second explosion-proof valves (21) away from the single battery (20); A second fireproof plate (60) is provided between two adjacent single cells (20), and / or the second fireproof plate (60) is provided between the single cells (20) and the side wall of the installation cavity.

11. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 10.

12. An energy storage device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 10.

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