Battery pack, electric equipment and energy storage equipment

Abstract

The utility model provides a battery pack, electric equipment and energy storage equipment, the battery pack comprises a pack body, the pack body is provided with a mounting cavity, the pack body is provided with a fire hole and a pressure relief hole which are communicated with the mounting cavity, the mounting cavity forms a cuboid, and the pressure relief hole is communicated with the mounting cavity. The mounting cavity is provided with a first central axis in the length direction of the mounting cavity, a second central axis extending in the width direction of the mounting cavity and a third central axis extending in the height direction of the mounting cavity, and the bag body is divided into different areas by the plane where the first central axis and the third central axis are located and the plane where the second central axis and the third central axis are located; the fire hole and the pressure relief hole are respectively positioned on the side walls of different diagonally arranged areas; the battery module is arranged in the mounting cavity, and at least part of the battery module is located between the fire hole and the pressure relief hole. According to the battery pack disclosed by the utility model, the fire-fighting hole and the pressure relief hole are formed in the side walls of different diagonally arranged areas of the pack body, so that the effect of inhibiting thermal runaway can be effectively improved, and thermal runaway spreading in the battery pack is avoided.

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] The battery pack will generate heat during the use process and will inevitably have problems such as thermal runaway. When thermal runaway occurs in the battery pack, high-temperature gas and smoke will be ejected from the explosion-proof valve of the battery pack. In order to reduce the hazards of thermal runaway, the battery pack needs to be subjected to fire-fighting treatment.

[0003] In the prior art, a fire nozzle is usually installed near the explosion-proof valve of the battery pack, and the fire-fighting medium is sprayed out of the fire-fighting nozzle to carry out fire-fighting treatment on the battery pack. However, since the fire-fighting nozzle is close to the explosion-proof valve, when the high-temperature gas and smoke are sprayed out from the explosion-proof valve, suction is generated on the fire-fighting medium, so that the area of ​​the battery module covered by the fire-fighting medium is small, and the fire-fighting effect is poor, which leads to the problem of thermal runaway spreading easily in the battery pack. Utility Model Content

[0004] The first aspect of the utility model provides a new technical solution for a battery pack, which can at least solve the technical problem that thermal runaway is easy to spread in the existing battery pack.

[0005] A second aspect of the utility model provides an electrical device, comprising the above-mentioned battery pack.

[0006] A third aspect of the present invention provides an energy storage device, comprising the above-mentioned battery pack.

[0007] According to a first aspect of the utility model, a battery pack is provided, comprising: a pack body, the pack body being provided with an installation cavity, the pack body being provided with a fire hole and a pressure relief hole connected to the installation cavity, the installation cavity being formed as a rectangular parallelepiped, the installation cavity having a first central axis along its length direction, a second central axis extending along its width direction, and a third central axis extending along its height direction, wherein the plane where the first central axis and the third central axis are located and the plane where the second central axis and the third central axis are located divide the pack body into different areas, the fire hole and the pressure relief hole are respectively located on the side walls of different areas arranged diagonally; a battery module, the battery module being arranged in the installation cavity, and at least a part of the battery module being located between the fire hole and the pressure relief hole.

[0008] Optionally, the distance L between the fire-fighting hole and the pressure relief hole 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 fire-fighting hole and the pressure relief hole satisfies:

[0012]

[0013] Optionally, the width w of the installation cavity is greater than the height h of the installation cavity, and the distance L between the fire-fighting hole and the pressure relief hole satisfies:

[0014]

[0015] Optionally, the side wall where the fire fighting hole is located is perpendicular to the side wall where the pressure relief hole is located.

[0016] Optionally, the horizontal height of the fire-fighting hole is higher than the horizontal height of the pressure relief hole; and / or, the fire-fighting hole is located at one of the vertex corners of the enclosure.

[0017] Optionally, the battery pack further includes: an explosion-proof valve, which is arranged at the pressure relief hole; and a fire-fighting nozzle, which is arranged at the fire-fighting hole and is used to spray a fire-fighting medium into the installation cavity.

[0018] Optionally, the battery pack further includes: a fire detection unit, wherein the fire detection unit is disposed in the pack body and is used to detect the situation in the installation cavity.

[0019] Optionally, the battery module includes: a plurality of single cells, each of which is provided with a pressure relief valve at one end; the battery pack also includes: a first fireproof plate, which is arranged in the installation cavity and covers the side of the plurality of pressure relief valves away from the single cells.

[0020] Optionally, the battery pack further includes: at least one second fireproof plate, wherein the second fireproof plate is arranged between two adjacent single batteries.

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

[0022] According to a third aspect of the utility model, there is provided an energy storage device, comprising the above-mentioned battery pack.

[0023] According to the battery pack of the utility model, by arranging the fire-fighting holes and the pressure relief holes on the side walls of different areas arranged diagonally on the package body, the area of ​​the battery module covered by the fire-fighting medium can be increased, thereby effectively improving the effect of suppressing thermal runaway and avoiding the spread of thermal runaway in the battery pack; and at least part of the battery module is located between the two, which is conducive to the fire-fighting medium quickly and widely covering the surface of the battery module, thereby further improving the effect of suppressing thermal runaway and avoiding the spread of thermal runaway in the battery pack.

[0024] 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

[0025] 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.

[0026] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model;

[0027] Figure 2 It is a partial structural schematic diagram of a battery pack according to an embodiment of the present utility model;

[0028] Figure 3 is a three-dimensional diagram of a battery pack according to an embodiment of the present utility model when a top cover is not installed;

[0029] Figure 4 yes Figure 3 A cross-sectional view of the battery pack in one direction;

[0030] Figure 5 yes Figure 3 A cross-sectional view of the battery pack in another direction;

[0031] Figure 6 It is a partial structural schematic diagram of a battery pack according to an embodiment of the utility model.

[0032] Reference numerals

[0033] Battery pack 100;

[0034] Enclosure 10; Fire hole 11; Pressure relief hole 12;

[0035] Battery module 20; single battery 21; pressure relief valve 21a;

[0036] Explosion-proof valve 30; fire nozzle 40; first fireproof board 50; second fireproof board 60;

[0037] The first central axis is X; the second central axis is Y; the third central axis is Z. DETAILED DESCRIPTION

[0038] 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.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The following first describes in detail the battery pack 100 according to the embodiment of the utility model with reference to the drawings.

[0044] like Figures 1 to 6 As shown, the battery pack 100 according to the embodiment of the present invention includes: a pack body 10 and a battery module 20 .

[0045] Specifically, the package body 10 is provided with an installation cavity, and the package body 10 is provided with a fire hole 11 and a pressure relief hole 12 connected to the installation cavity. The installation cavity is formed as a rectangular parallelepiped, and the installation cavity has a first central axis X extending along its length direction, a second central axis Y extending along its width direction, and a third central axis Z extending along its height direction, wherein the plane where the first central axis X and the third central axis Z are located and the plane where the second central axis Y and the third central axis Z are located divide the package body 10 into different areas, and the fire hole 11 and the pressure relief hole 12 are respectively located on the side walls of different diagonally arranged areas; a battery module 20, the battery module 20 is arranged in the installation cavity, and at least a portion of the battery module 20 is located between the fire hole 11 and the pressure relief hole 12.

[0046] In other words, if Figures 1 to 6As shown, the battery pack 100 according to the embodiment of the utility model mainly includes a pack body 10 and a battery module 20, wherein the pack body 10 is roughly formed into a rectangular parallelepiped structure, and a rectangular parallelepiped installation cavity is defined in the pack body 10, and the installation cavity is adapted to the battery module 20, so that the battery module 20 can be installed in the installation cavity. The pack body 10 is also provided with a fire hole 11 and a pressure relief hole 12 connected to the installation cavity. When a fire is extinguished, a fire medium can be sprayed into the installation cavity through the fire hole 11.

[0047] like Figures 1 to 3 As shown, in this embodiment, the firefighting medium that can be sprayed into the installation cavity through the firefighting hole 11 is in atomized form or gaseous form, and the firefighting medium in atomized form or gaseous form is conducive to quickly filling the installation cavity. When the battery module 20 has thermal runaway, the gas generated by the thermal runaway is sprayed out from the pressure relief hole 12. According to the Bernoulli principle, the pressure is small where the flow rate is large, and the location of the pressure relief hole 12 will generate suction for the firefighting medium. In order to increase the coverage area of ​​the firefighting medium in the installation cavity, the distance between the firefighting hole 11 and the pressure relief hole 12 can be increased.

[0048] Based on this, the battery pack 100 of the embodiment of the utility model separates the fire hole 11 from the pressure relief hole 12 . The following specifically describes the setting positions of the fire hole 11 and the pressure relief hole 12 based on the installation cavity.

[0049] like Figures 1 to 3 As shown, the installation cavity has a first central axis X along its length direction, a second central axis Y extending along its width direction, and a third central axis Z extending along its height direction, wherein the first central axis X and the third central axis Z are in a plane called an XZ plane, the second central axis Y and the third central axis Z are in a plane called a YZ plane, the XZ plane and the YZ plane separate the enclosure 10 into different areas, namely, a first area, a second area, a third area and a fourth area, the first area is diagonally arranged with the third area, the second area is diagonally arranged with the fourth area, and the positions of the fire-fighting hole 11 and the pressure relief hole 12 include but are not limited to the following situations:

[0050] Case 1: The fire-fighting hole 11 is arranged on the side wall of the package 10 in the first area, and the pressure relief hole 12 is arranged on the side wall of the package 10 in the third area, thereby increasing the distance between the fire-fighting hole 11 and the pressure relief hole 12, so that the fire-fighting medium will not be ejected from the pressure relief hole 12 quickly after entering the installation cavity from the fire-fighting hole 11, 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 battery module 20 in the entire installation cavity as much as possible, which can solve the technical problem of the small coverage area of ​​the fire-fighting medium and improve the effect of suppressing thermal runaway;

[0051] Case 2: The fire hole 11 is arranged on the side wall of the package 10 in the second area, and the pressure relief hole 12 is arranged on the side wall of the package 10 in the fourth area, thereby increasing the distance between the fire hole 11 and the pressure relief hole 12, so that the fire-fighting medium will not be sprayed out from the pressure relief hole 12 quickly after entering the installation cavity from the fire hole 11, 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 battery module 20 in the entire installation cavity as much as possible, which can solve the technical problem of the small coverage area of ​​the fire-fighting medium and improve the effect of suppressing thermal runaway.

[0052] Furthermore, the connection line between the fire hole 11 and the pressure relief hole 12 passes through the battery module 20 in the installation cavity, so that at least part of the battery module 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 fire hole 11 can impact the surface of the battery module 20 and / or the inner wall surface of the installation cavity, and the fire-fighting medium impacting the battery module 20 and / or the inner wall surface of the installation cavity can be dispersed along its impact surface, which can prevent the fire-fighting medium from flowing directly to the pressure relief hole 12, which is conducive to the fire-fighting medium quickly and covering the surface of the battery module 20 over a large area.

[0053] Therefore, according to the battery pack 100 provided in this embodiment, by arranging the fire-fighting holes 11 and the pressure relief holes 12 on the side walls of different areas diagonally arranged on the package body 10, the area of ​​the battery module 20 covered by the fire-fighting medium can be increased, thereby effectively improving the effect of suppressing thermal runaway and avoiding the spread of thermal runaway in the battery pack 100; and at least part of the battery module 20 is located between the two, which is conducive to the fire-fighting medium quickly and widely covering the surface of the battery module 20, thereby further improving the effect of suppressing thermal runaway and avoiding the spread of thermal runaway in the battery pack 100.

[0054] In some specific embodiments of the present utility model, the distance L between the fire hole 11 and the pressure relief hole 12 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, the locations of the fire-fighting holes 11 and the pressure-relief holes 12 include but are not limited to the following situations:

[0058] Case 1: The fire hole 11 is arranged on the first side of the length direction of the package body 10, and the pressure relief hole 12 is arranged on the second side of the length direction of the package body 10, so that the distance between the fire hole 11 and the pressure relief hole 12 can be greater than the length d of the installation cavity, which can further increase the distance of the flow path of the fire-fighting medium, and can prevent the fire-fighting medium from flowing directly to the pressure relief hole 12, which is conducive to the fire-fighting medium quickly and widely covering the surface of the battery module 20, and can further prevent the spread of thermal runaway in the battery pack 100.

[0059] Case 2: The fire-fighting hole 11 can be arranged at the upper corner of the enclosure 10 in the first area, and the pressure relief hole 12 can be arranged at the lower corner of the enclosure 10 in the third area, so that the distance between the fire-fighting hole 11 and the pressure relief hole 12 can reach the maximum value:

[0060]

[0061] Thus, the distance of the flow path of the fire-fighting medium can be increased to the greatest extent, and the time and space for the fire-fighting medium to pass through the installation cavity can be increased, so that the fire-fighting medium can cover the entire battery module 20 in the installation cavity as much as possible, and the spread of thermal runaway in the battery pack 100 can be further avoided.

[0062] According to one embodiment of the utility model, the distance L between the fire hole 11 and the pressure relief hole 12 satisfies:

[0063]

[0064] In other words, the fire-fighting hole 11 can be arranged on the first side of the length direction of the enclosure 10, and the pressure relief hole 12 can be arranged on the second side of the length direction of the enclosure 10, and the distance between the fire-fighting hole 11 and the pressure relief hole 12 in the height direction or the width direction of the enclosure 10 is not less than the height h of the installation cavity, so that the distance between the fire-fighting hole 11 and the pressure relief hole 12 can be not less than the following value:

[0065]

[0066] Thereby, the flow path distance of the fire-fighting medium is further increased, and the time and space for the fire-fighting medium to pass through the installation cavity are improved, so that the fire-fighting medium can cover the entire battery module 20 in the installation cavity as much as possible, which can further prevent the spread of thermal runaway in the battery pack 100.

[0067] In some specific embodiments of the present invention, the width w of the installation cavity is greater than the height h of the installation cavity, and the distance L between the fire hole 11 and the pressure relief hole 12 satisfies:

[0068]

[0069] That is to say, when the width of the installation cavity is greater than the height of the installation cavity, the fire hole 11 can be arranged on the first side of the length direction of the package body 10, and the pressure relief hole 12 can be arranged on the second side of the length direction of the package body 10, and the distance between the projection of the pressure relief hole 12 on the first side of the length direction of the package body 10 and the fire hole 11 is not less than the width w of the installation cavity, so that the distance between the fire hole 11 and the pressure relief hole 12 can be not less than the following value:

[0070]

[0071] Thereby, the flow path distance of the fire-fighting medium is further increased, and the time and space for the fire-fighting medium to pass through the installation cavity are improved, so that the fire-fighting medium can cover the entire battery module 20 in the installation cavity as much as possible, which can further prevent the spread of thermal runaway in the battery pack 100.

[0072] According to an embodiment of the present utility model, the side wall where the fire-fighting hole 11 is located is perpendicular to the side wall where the pressure relief hole 12 is located.

[0073] Specifically, Figures 1 to 3 As shown, the fire-fighting hole 11 is provided on the side wall in the length direction of the package body 10, and the pressure relief hole 12 is provided on the side wall in the width direction of the package body 10. When multiple battery packs 100 are arranged in an array, the battery pack 100 of this embodiment can prevent the high-temperature substances sprayed from the pressure relief hole 12 from damaging the fire-fighting pipelines of adjacent battery packs 100.

[0074] In some specific embodiments of the present invention, the horizontal height of the fire-fighting hole 11 is higher than the horizontal height of the pressure relief hole 12 ; and / or, the fire-fighting hole 11 is located at one of the top corners of the enclosure 10 .

[0075] That is to say, Figures 1 to 3 As shown, the fire hole 11 and the pressure relief hole 12 can be staggered in the height direction of the package body 10, which can effectively increase the distance between the fire hole 11 and the pressure relief hole 12, and can increase the time and space for the fire-fighting medium to pass through the installation cavity. When in use, the battery pack 100 can be placed horizontally, and the horizontal height of the fire hole 11 is higher than the horizontal height of the pressure relief hole 12, so that the fire-fighting medium can flow out from the pressure relief hole 12 in time after entering the installation cavity, which is conducive to the renewal of the fire-fighting medium in the installation cavity, and can avoid the fire-fighting medium in the installation cavity from being too high in temperature, and can improve the suppression effect of thermal runaway, thereby effectively avoiding the spread of thermal runaway in the battery pack.

[0076] In this embodiment, the fire-fighting hole 11 is located at the top corner of the package body 10 in the first area, thereby effectively reducing the fire-fighting blind spot in the installation cavity and effectively preventing the thermal runaway from spreading in the battery pack 100 .

[0077] According to one embodiment of the utility model, the battery pack 100 further includes: an explosion-proof valve 30 and a fire nozzle 40, the explosion-proof valve 30 is arranged at the pressure relief hole 12, the fire nozzle 40 is arranged at the fire hole 11, and the fire nozzle 40 is used to spray fire-fighting medium into the installation cavity.

[0078] Specifically, Figures 1 to 3 As shown, an explosion-proof valve 30 is provided in the pressure relief hole 12, and the pressure relief hole 12 can be blocked by the explosion-proof valve 30. When the battery module 20 has thermal runaway, the explosion-proof valve 30 can be used to release pressure in the package 10, thereby effectively preventing the battery pack 100 from exploding, and when the battery module 20 is extinguished, the firefighting medium can also flow out from the explosion-proof valve 30. A firefighting nozzle 40 is provided in the firefighting hole 11, and the first end of the firefighting nozzle 40 is located in the installation cavity, and the second end of the firefighting nozzle 40 can be connected to the firefighting pipeline of the firefighting system, so that the firefighting nozzle 40 can be controlled by the firefighting system to spray the firefighting medium into the installation cavity.

[0079] In some specific embodiments of the present invention, the battery pack 100 further includes: a fire detection unit, which is disposed in the pack body 10 and is used to detect the situation in the installation cavity.

[0080] That is to say, the package 10 is provided with a fire detection unit, which includes one or more of a gas sensor and a temperature sensor. The setting position of the fire detection unit includes but is not limited to the following situations:

[0081] Case 1: There may be multiple fire detection units, and the multiple fire detection units may be arranged at different positions inside the package body 10 to facilitate detection of the situation inside the installation cavity;

[0082] Case 2: The fire detection unit can be integrated on the explosion-proof valve 30. When one or more single cells 21 of the battery module 20 experience thermal runaway, the gas or smoke generated by the thermal runaway is first discharged from the explosion-proof valve 30, so there is no need to set sensors at multiple positions in the package 10. The thermal runaway of the single cell 21 can be detected in time by the fire detection unit on the explosion-proof valve 30, which solves the problem of not being able to detect the thermal runaway of the single cell 21 in time, and reduces the production cost of the battery pack 100. At the same time, the space of the package 10 is reasonably utilized, thereby improving the space utilization rate of the package 10.

[0083] When in use, the fire detection unit can be electrically connected to the fire protection system and can be powered by the fire protection system. The fire detection unit can detect the situation in the installation cavity in real time and send the detection result to the fire protection system. When the sensing unit 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 fire protection medium to the fire protection nozzle 40, and the fire protection medium can be sprayed from the first end of the fire protection nozzle 40 into the installation cavity to cool down the battery module 20 and extinguish the fire.

[0084] According to one embodiment of the utility model, the battery module 20 includes: a plurality of single cells 21, each end of which is provided with a pressure relief valve 21a, and the battery pack 100 also includes: a first fireproof plate 50, the first fireproof plate 50 is arranged in the installation cavity, and the first fireproof plate 50 covers the side of the plurality of pressure relief valves 21a away from the single cells 21.

[0085] In other words, if Figures 1 to 6 As shown, the battery module 20 can be composed of a plurality of single cells 21, the first end of the single cell 21 is in contact with the package body 10, the second end of the single cell 21 is provided with a pressure relief valve 21a, and a first fireproof plate 50 is provided in the installation cavity. The first fireproof plate 50 is located on the side of the pressure relief valve 21a away from the single cell 21, and the pressure relief valve 21a can be separated from the top cover of the package body 10 by the first fireproof plate 50.

[0086] The first fireproof plate 50 can be a mica board, which has the function of flame retardancy and heat insulation. When the pressure relief valve 21a of the single battery 21 breaks due to thermal runaway, the pressure relief valve 21a can resist high temperature impact, and the material sprayed from the pressure relief valve 21a can be prevented from damaging the top cover of the package 10. 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 relatively 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.

[0087] In some specific embodiments of the present invention, the battery pack 100 further includes: at least one second fireproof plate 60 , and the second fireproof plate 60 is disposed between two adjacent single batteries 21 .

[0088] Specifically, Figure 4 and Figure 5As shown, a second fireproof board 60 is provided between two adjacent single cells 21. 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 21 in a single battery module 20 from spreading to other single cells 21. In addition, the aerogel fireproof board has a certain amount of compression, which will not cause the battery module 20 to occupy too much space in the package 10.

[0089] 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.

[0090] 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, it can effectively suppress the thermal runaway phenomenon, avoid the spread of thermal runaway in the battery pack 100, and reduce the risk of fire and explosion of the battery pack 100, thereby improving the safety of the electrical equipment.

[0091] 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.

[0092] 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, it can effectively suppress the thermal runaway phenomenon, avoid the spread of thermal runaway in the battery pack 100, and reduce the risk of fire and explosion of the battery pack 100, thereby improving the safety of the energy storage device.

[0093] 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 housing (10), wherein the housing (10) is provided with an installation cavity, wherein the housing (10) is provided with a fire hole (11) and a pressure relief hole (12) which are communicated with the installation cavity, wherein the installation cavity is formed into a rectangular parallelepiped, wherein the installation cavity has a first central axis (X) along its length direction, a second central axis (Y) extending along its width direction, and a third central axis (Z) extending along its height direction, The plane where the first central axis (X) and the third central axis (Z) are located and the plane where the second central axis (Y) and the third central axis (Z) are located divide the enclosure (10) into different areas, and the fire-fighting hole (11) and the pressure relief hole (12) are respectively located on the side walls of different areas arranged diagonally; A battery module (20), the battery module (20) being arranged in the installation cavity, and at least a portion of the battery module (20) being located between the fire-fighting hole (11) and the pressure relief hole (12).

2. The battery pack according to claim 1, characterized in that: The distance L between the fire-fighting hole (11) and the pressure relief hole (12) 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 fire-fighting hole (11) and the pressure relief hole (12) satisfies:

4. The battery pack according to claim 2, characterized in that: The width w of the installation cavity is greater than the height h of the installation cavity, and the distance L between the fire-fighting hole (11) and the pressure relief hole (12) satisfies:

5. The battery pack according to claim 1, characterized in that: The side wall where the fire-fighting hole (11) is located is perpendicular to the side wall where the pressure relief hole (12) is located.

6. The battery pack according to claim 1, characterized in that: The level of the fire-fighting hole (11) is higher than the level of the pressure relief hole (12); and / or, The fire-fighting hole (11) is located at one of the top corners of the enclosure (10).

7. The battery pack according to claim 1, characterized in that: Also includes: An explosion-proof valve (30), the explosion-proof valve (30) being arranged at the pressure relief hole (12); A fire-fighting nozzle (40), wherein the fire-fighting nozzle (40) is arranged at the fire-fighting hole (11), and the fire-fighting nozzle (40) is used to spray a fire-fighting medium into the installation cavity.

8. The battery pack according to claim 1, characterized in that: Also includes: A fire detection unit, wherein the fire detection unit is arranged in the enclosure (10), and the fire detection unit is used to detect the situation in the installation cavity.

9. The battery pack according to claim 1, characterized in that: The battery module (20) comprises: A plurality of single cells (21), each of the single cells (21) being provided with a pressure relief valve (21a) at one end thereof, and the battery pack further comprising: A first fireproof plate (50), wherein the first fireproof plate (50) is arranged in the installation cavity, and the first fireproof plate (50) covers a side of the plurality of pressure relief valves (21a) away from the single battery (21).

10. The battery pack according to claim 9, characterized in that: Also includes: At least one second fireproof plate (60), wherein the second fireproof plate (60) is arranged between two adjacent single batteries (21).

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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