Single battery, battery pack and electric equipment

Abstract

The utility model provides a single battery, a battery pack and electric equipment. According to the single battery provided by the invention, the accommodating gap is formed between the first layer plate and the second layer plate, so that the accommodating gap can accommodate more gas when the single battery is in thermal runaway; as the accommodating gap is communicated with the first space in which the battery cell is located, and the accommodating gap is also communicated with the second space, namely, the accommodating gap is communicated with the top and the bottom of the single battery, a path of gas from the top of the first space in which the battery cell is located to the bottom of the shell is not easy to hinder, and the gas in the top area can quickly reach the bottom. On the basis, after the gas at the bottom is accumulated to a certain amount, the gas pressure is increased to explode the explosion-proof valve, and at the moment, the gas is discharged out of the shell of the single battery from the exploded explosion-proof valve, and the flowing path of the gas from the top area to the bottom area is smoother, so that the gas is promoted to be accumulated in the area of the explosion-proof valve and is discharged after the explosion-proof valve is exploded; the top cover is prevented from being exploded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a single battery, a battery pack and an electric device. BACKGROUND

[0002] In the design scheme of the existing explosion-proof valve at the bottom of the battery, the thermal and electrical separation of the battery cell is realized, the bottom explosion-proof valve is physically isolated from the top side pole, and the problem of high pressure short circuit caused by battery thermal runaway is solved. However, when the battery releases high-temperature and high-pressure gas during thermal runaway, the gas will still accumulate in the top cover area when the exhaust is not smooth, which will increase the internal pressure of the top cover and cause deformation, further causing the top cover to burst open, and in the case of a whole vehicle, the battery cell will burst open and release the thermal runaway gas into the vehicle interior space, causing a safety accident.

[0003] In the prior art, a bottom tray structure is often used to support the battery cell between the shell bottom and the battery cell, but this will block the gas flow in the shell, which is not conducive to gas exhaust and has a high safety risk. UTILITY MODEL CONTENT

[0004] Therefore, the present application provides a single battery, a battery pack and an electric device, which relates to the technical field of batteries.

[0005] The first aspect of the present application provides a single battery having a Z direction, comprising:

[0006] A shell, a top cover, a battery cell and an explosion-proof valve, the top cover is provided on the shell in the Z direction, the battery cell is provided in the shell, the shell is provided with a bottom wall, and the explosion-proof valve is provided on the bottom wall;

[0007] An insulating support, the insulating support is located between the battery cell and the bottom wall in the Z direction, the insulating support comprises a first layer plate and a second layer plate which are spaced apart in the Z direction, and a containing gap is formed between the first layer plate and the second layer plate;

[0008] In the Z direction, the first layer plate is located between the battery cell and the second layer plate, and a first space is formed between the first layer plate and the top cover, the battery cell is located in the first space, the containing gap is in communication with the first space, and in the Z direction, the insulating support and the explosion-proof valve further have a second space, and the containing gap is in communication with the second space.

[0009] On the basis of the above technical scheme, preferably, the shell further has a side wall, the side wall is connected with the bottom wall, the first layer plate is fixed with the side wall, the first layer plate is provided with a plurality of first through holes, the first through holes penetrate through the first layer plate, so that the containing gap is in communication with the first space; and / or

[0010] The second layer plate is fixed with the side wall or the bottom wall; the second layer plate is provided with a plurality of second through holes penetrating through the second layer plate, and at least one of the second through holes has an overlapping part with the explosion-proof valve in the orthogonal projection on a plane perpendicular to the Z direction, so that the accommodation gap is communicated with the second space.

[0011] On the basis of any one of the above technical solutions, preferably, the insulating support is provided with the electric core or the bottom wall, and the insulating support further comprises a connecting column arranged in the accommodation gap and connecting the first layer plate and the second layer plate, and the connecting column is provided with a plurality of connecting columns and is arranged at intervals.

[0012] On the basis of the above technical solution, preferably, the first layer plate, the second layer plate and the connecting column are integrally arranged or are connected by heat melting.

[0013] On the basis of the above technical solution, preferably, the shell further has a side wall connected with the bottom wall, and the second layer plate is located between the first layer plate and the bottom wall in the Z direction.

[0014] The first layer plate has a first plate edge, at least a part of the first plate edge is arranged at intervals between the side wall, so that the accommodation gap is communicated with the side of the first layer plate facing the electric core; and / or, the second layer plate has a second plate edge, at least a part of the second plate edge is arranged at intervals between the side wall, so that the accommodation gap is communicated with the side of the second layer plate facing the explosion-proof valve.

[0015] On the basis of the above technical solution, preferably, the electric core has a first end and a second end in the Z direction, the first end faces the top cover, the second end faces the explosion-proof valve, and the first layer plate is fixed to the second end of the electric core.

[0016] On the basis of the above technical solution, preferably, the single battery further comprises a protective film, the second end is attached with the protective film, and the first layer plate is connected to the protective film.

[0017] On the basis of the above technical solution, preferably, the electric core is further provided with a gas guide channel, the gas guide channel extends along the Z direction, and the gas guide channel is communicated with the accommodation gap.

[0018] On the basis of the above technical solution, preferably, the bottom wall is provided with a groove, and a groove opening of the groove faces the insulating support in the Z direction; the groove has a groove wall in the Z direction, the groove wall is provided with an explosion-proof hole penetrating through along the Z direction, the explosion-proof valve is arranged on the groove wall and closes the explosion-proof hole, and the groove forms the second space between the explosion-proof valve and the insulating support.

[0019] According to a second aspect of the present application, a battery pack is provided, comprising the single battery as described above.

[0020] According to a third aspect of the present application, a power consuming device is provided, comprising the battery pack as described above.

[0021] Thus, according to the single battery provided by the present application, on one hand, since the accommodation gap is between the first layer plate and the second layer plate, the accommodation gap can accommodate more gas when the single battery is in thermal runaway; on the other hand, since the accommodation gap is in communication with the first space where the battery cell is located and is also in communication with the second space, i.e., in communication with the top and the bottom of the single battery, it is not easy to hinder the path of the gas from the top of the first space where the battery cell is located to the bottom of the shell, thereby facilitating the gas in the top region to quickly reach the bottom. On this basis, when the gas in the bottom accumulates to a certain amount, the gas pressure rises to make the explosion-proof valve burst open, at which time the gas is discharged from the shell of the single battery through the burst-open explosion-proof valve, thereby preventing the gas from accumulating in the region of the top cover to cause the top cover to burst open.

[0022] According to the single battery provided by the present application, since the insulation support with the accommodation gap is not easy to hinder the path of the gas from the top to the bottom, the path of the gas flow in the shell, especially the path of the gas flow from the top region to the bottom region, is more unobstructed, thereby facilitating the gas to accumulate in the region of the explosion-proof valve and be discharged after the explosion-proof valve bursts open, avoiding the gas from failing to reach the region of the explosion-proof valve to cause the top cover to burst open.

[0023] In order to make the above objectives, characteristics and advantages of the present application more apparent and comprehensible, the following will specifically describe preferred embodiments in combination with the accompanying drawings, and make a detailed description as follows. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without paying creative labor on the basis of these drawings.

[0025] Figure 1 A structural schematic diagram of a single battery provided by an embodiment of the present application is shown.

[0026] Figure 2 A schematic diagram of the relative position relationship between the battery cell and the insulation support of the single battery provided by an embodiment of the present application is shown.

[0027] Figure 3 A schematic diagram of the insulation support of the single battery provided by an embodiment of the present application is shown.

[0028] Figure 4 A schematic view showing a partial structure of an insulation support of a single battery is shown.

[0029] Figure 5 A schematic view showing a bottom wall side of a single battery is shown.

[0030] Figure 6 A schematic view showing another perspective of an insulation support of a single battery is shown.

[0031] Figure 7 A schematic view showing Figure 6 A schematic view showing a first layer plate, a second layer plate and a connecting column.

[0032] Figure 8 A cross-sectional view of a single battery omitting an electrode group is shown.

[0033] Figure 9 A schematic view showing Figure 8 A schematic view showing an enlarged view at A.

[0034] Reference signs:

[0035] 10 - housing; 11 - bottom wall; 11a - groove; 11b - slot wall; 11c - explosion-proof hole; 12 - side wall; 20 - top cover; 30 - electrode group; 40 - insulation support; 41 - first layer plate; 41a - first plate edge; 42 - first through hole; 43 - second layer plate; 43a - second plate edge; 44 - second through hole; 45 - connecting column; 46 - accommodating gap; 50 - explosion-proof valve; 60 - first space; 70 - second space. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0040] According to the first aspect of the embodiment of the present application, a single battery is provided, which will be described below in combination with Figures 1 to 9 The structure of the single battery is specifically described.

[0041] According to the single battery provided by the embodiment of the present application, there is a Z direction, and the single battery comprises a shell 10, a top cover 20, a battery cell 30 and an explosion-proof valve 50.

[0042] In the embodiment, the top cover 20 is provided on the shell 10 in the Z direction, the battery cell 30 is arranged in the shell 10, the shell 10 is provided with a bottom wall 11, and the explosion-proof valve 50 is arranged on the bottom wall 11. In the embodiment, the insulating support 40 is located between the battery cell 30 and the bottom wall 11 in the Z direction, and the insulating support 40 comprises a first layer plate 41 and a second layer plate 43 which are arranged at intervals in the Z direction, and a receiving gap 46 is formed between the first layer plate 41 and the second layer plate 43; in the Z direction, the first layer plate 41 is located between the battery cell 30 and the second layer plate 43, and a first space 60 is formed between the first layer plate 41 and the top cover 20, the battery cell 30 is located in the first space 60, the receiving gap 46 is communicated with the first space 60, and the insulating support 40 and the explosion-proof valve 50 further have a second space 70 in the Z direction, and the receiving gap 46 is communicated with the second space 70.

[0043] Therefore, according to the single battery provided in the embodiments of the present application, on the one hand, the accommodation gap 46 between the first layer plate 41 and the second layer plate 43 can accommodate more gas when the single battery is in thermal runaway; on the other hand, the accommodation gap 46 is in communication with the first space 60 where the battery cell 30 is located, and is also in communication with the second space 70, that is, in communication with the top and bottom of the single battery, so that the path of the gas from the top of the first space 60 where the battery cell 30 is located to the bottom of the shell is not easily blocked, thereby facilitating the rapid arrival of the gas in the top region to the bottom. On this basis, when the gas accumulated in the bottom reaches a certain amount, the gas pressure rises to make the explosion-proof valve 50 burst, at which time the gas is discharged from the shell 10 of the single battery.

[0044] According to the single battery provided in the embodiments of the present application, since the insulating support 40 with the accommodation gap 46 does not easily block the path of the gas from the top to the bottom, the path of the gas in the shell 10, especially the path of the gas from the region of the top cover 20 to the region of the explosion-proof valve 50, is more unobstructed, thereby facilitating the discharge of the gas in the shell 10.

[0045] Compared with the bottom supporting plate in the related art, such a bottom supporting plate is arranged between the lower end of the battery cell 30 and the bottom of the shell 10, and when the battery cell 30 generates a large amount of gas due to thermal runaway or the like, the bottom supporting plate can hinder the gas in the region of the top cover 20 from gathering towards the region of the explosion-proof valve 50 at the bottom, thereby causing the gas pressure in the region of the top cover 20 to be relatively large, resulting in the explosion of the top cover 20. However, the single battery provided in the embodiments of the present application can effectively improve this problem.

[0046] In the embodiments, the "Z direction" mentioned in the above description should be understood as including the meaning of the height direction of the single battery, and the height direction of the battery herein is the direction determined by the top (the position of the top cover 20) and the bottom (the position of the bottom wall 11) of the single battery, that is, the top and the bottom of the single battery are opposite to each other in the height direction.

[0047] In the embodiments, the insulating support 40 can be formed of an insulating material such as plastic, for example, the first layer plate 41 and the second layer plate 43 can both be formed of plastic, and the purpose of the insulating performance of the insulating support 40 is to ensure that the battery cell 30 and the shell 10 are insulated. In the embodiments, the insulating support 40 can also serve to support the battery cell 30, that is, to support the battery cell 30 on the bottom wall 11 of the shell 10.

[0048] In embodiments, the single battery according to the embodiments of the present application, the shell 10 further has a side wall 12 connected with the bottom wall 11, and the first layer plate 41 is fixed with the side wall 12; the first layer plate 41 can be provided with a plurality of first through holes 42 penetrating through the first layer plate 41, so that the first through holes 42 communicate the accommodation gap 46 and the first space. In embodiments, these first through holes 42 can serve as a communication path between the accommodation gap 46 and the side of the insulation support 40 facing the battery cell 30, in other words, the gas on the side of the battery cell 30 can enter the accommodation gap 46 through these first through holes 42.

[0049] In embodiments, the plurality of first through holes 42 described above can be arranged on the first layer plate 41 in an array manner, or in a combined manner of array plus other distribution. In embodiments, taking the latter arrangement manner as an example, the number of first through holes 42 can be 42, of which 40 through holes can be arranged in a combined manner of 5 by 8 array plus 2 through holes distributed on both sides of the array.

[0050] Alternatively or additionally, the second layer plate 43 is fixed with the side wall 12 or the bottom wall 11; the second layer plate 43 can be provided with a plurality of second through holes 44, the second through holes 44 can penetrate through the second layer plate 43, and at least one second through hole 44 has an overlapping part with the explosion-proof valve 50 in the projection on the plane perpendicular to the Z direction, so that the second through hole 44 communicates the accommodation gap 46 and the second space 70, and the gas in the accommodation gap 46 can reach the explosion-proof valve 50.

[0051] In embodiments, the second through hole 44 has an overlapping part with the explosion-proof valve 50 in the projection on the plane perpendicular to the Z direction, that is, in the Z direction, the position of the second through hole 44 corresponds to that of the explosion-proof valve 50, so that the gas in the accommodation gap 46 can more conveniently guide the gas to the area where the explosion-proof valve 50 is located through the second through hole 44. As an example, the second layer plate 43 can be provided with a second through hole 44 opposite to the explosion-proof valve 50, that is, the projection of the second through hole 44 completely overlaps the explosion-proof valve 50, the second through hole 44 can have the same shape and size as the explosion-proof valve 50, so as to completely occupy the area where the explosion-proof valve 50 is located. In addition, as an example, corresponding to the area where the explosion-proof valve 50 is located, a plurality of second through holes 44 with smaller sizes can also be provided, these second through holes 44 can all completely overlap the explosion-proof valve 50 and all be located in the area where the explosion-proof valve 50 is located.

[0052] In addition, in the region of the second layer plate 43 corresponding to the non-explosion-proof valve 50, a plurality of second through holes 44 can also be formed, which can allow the gas in the accommodation gap 46 to flow from the gap between the second layer plate 43 and the bottom wall 11 to the second space 70, and then to the region where the explosion-proof valve 50 is located.

[0053] It should be noted that, since the second through hole 44 is a virtual body, the orthographic projection of the hole edge of the second through hole 44 in the plane perpendicular to the Z direction should be understood as the orthographic projection of the second through hole 44 in the plane perpendicular to the Z direction.

[0054] In embodiments, as an example, the shapes of the first through hole 42 and the second through hole 44 can be, for example, circular or polygonal, and the polygonal shape can be, for example, triangular, quadrilateral (such as rectangular or rhombic), pentagonal, or hexagonal, etc.

[0055] In embodiments, as an example, the shapes of the first through hole 42 and the second through hole 44 can be circular, and the areas of the first through hole 42 and the second through hole 44 can be 0.05-10mm 2 , which can be further 0.1-0.3mm 2 , for example, 0.15mm 2 , 0.2mm 2 , or 0.25mm 2 . In addition, the areas of the first through hole 42 and the second through hole 44 can also be 0.1mm 2 , 0.2mm 2 , 0.3mm 2 , 0.4mm 2 , 0.5mm 2 , 0.6mm 2 , 0.7mm 2 , 0.8mm 2 , 0.9mm 2 , 1mm 2 , 2mm 2 , 3mm 2 , 4mm 2 , 5mm 2 , 6mm 2 , 7mm 2 , 8mm 2 , or 9mm 2 .

[0056] According to the single battery provided in the embodiments of the present application, the insulating support 40 is arranged on the battery cell 30 or the bottom wall 11; the insulating support 40 can further include a connecting column 45, the connecting column 45 can be arranged in the accommodation gap 46 and connected to the first layer plate 41 and the second layer plate 43, and the connecting column 45 is provided with a plurality of connecting columns and is arranged at intervals.

[0057] In embodiments, the connecting columns 45 connect the first layer plate 41 and the second layer plate 43, improve the integrity of the insulation support 40, and also ensure that the accommodation gap 46 can exist by the connecting columns 45 providing the separation of the first layer plate 41 and the second layer plate 43. In embodiments, the connecting columns 45 can be provided, for example, 2, 3, 4, 5 or even more. In addition, the connecting columns 45 can be formed, for example, of a plastic material, such as PET (Polyethylene terephthalate) or PP (Polypropylene).

[0058] According to the single battery provided by the embodiments of the present application, the first layer plate 41, the second layer plate 43 and the connecting columns 45 can be integrally provided (for example, integrally formed) or connected by melting (i.e., hot melting).

[0059] According to the single battery provided by the embodiments of the present application, the housing 10 further has a side wall 12 connected with the bottom wall 11, and the second layer plate 43 can be located between the first layer plate 41 and the bottom wall 11 in the Z direction.

[0060] In embodiments, the first layer plate 41 has a first plate edge 41a, at least a part of the first plate edge 41a is arranged in a spaced manner between the side wall 12, so that the accommodation gap 46 is in communication with the side of the first layer plate 41 facing the battery cell 30. In embodiments, as an example, the first layer plate 41 can be smaller in size than the internal size of the housing 10, so that there is a space between the first plate edge 41a of the first layer plate 41 and the side wall 12 of the housing 10 for the gas to flow to the accommodation gap 46.

[0061] As an example, the first layer plate 41 can be, for example, rectangular in shape, and therefore, the first plate edge 41a can be formed by two long edges and two wide edges. In embodiments, the single battery can have the same length direction and width direction as the first layer plate 41, and on this basis, the two long edges of the first layer plate 41 can be shorter than the length of the single battery, and the length of the two wide edges of the first layer plate 41 can be slightly smaller than the width of the single battery (ensuring that the first layer plate 41 can be installed inside the housing 10 of the single battery). In this way, for each wide edge of the single battery, a space is formed between the wide edge and the opposite inner side of the housing 10, which is the space mentioned in the above description, and this space can allow the gas to flow from the side where the battery cell 30 is located to the accommodation gap 46.

[0062] In other examples, the two wide edges of the first layer plate 41 can be shorter than the width of the single battery, and the length of the two long edges of the first layer plate 41 can be slightly less than the length of the single battery, so as to form the above-mentioned spacing between each long edge of the first layer plate 41 and the inner side of the opposite housing 10. In addition, the first layer plate 41 can also be smaller in size than the length and width of the single battery in the length direction and the width direction, respectively, so as to form spacing between each edge portion (i.e., each of the two long edges and the two wide edges) and the inner side of the housing 10.

[0063] Similarly, the second layer plate 43 has a second plate edge 43a, at least a portion of which is spaced apart from the side wall 12 so that the accommodation gap 46 communicates with the side of the second layer plate 43 facing the explosion-proof valve 50. In the embodiment, the second layer plate 43 can form the spacing in the same manner as mentioned above for the first layer plate 41, which will not be described again here.

[0064] In addition, it should be noted that the shapes of the first layer plate 41 and the second layer plate 43 can not be limited to rectangles, but can also be other polygonal shapes, or can be adapted to the shape of the bottom of the single battery 30 (for example, as shown in the waist-shaped hole shape of Figure 3 and Figure 4 In addition, the sizes and shapes of the first layer plate 41 and the second layer plate 43 do not have to be exactly the same.

[0065] According to the single battery provided by the embodiment of the present application, the single battery 30 can have a first end and a second end in the Z direction, the first end can face the top cover 20, and the second end can face the explosion-proof valve 50. The first layer plate 41 can be fixed to the second end of the single battery 30, i.e., fixed to the side of the single battery 30 facing the explosion-proof valve 50, so that the insulating support 40 and the single battery 30 are assembled as a whole, which is more convenient.

[0066] According to the single battery provided by the embodiment of the present application, the single battery can also include a protective film, the second end can be provided with a protective film, and the first layer plate 41 is connected to the protective film. As an example, the first layer plate 41 can be connected to the protective film in a hot melt or adhesive manner. As an example, the protective film can be, for example, a mylar film, i.e., a mylar film, which can be attached to the circumferential side and the bottom of the single battery 30. In other embodiments, the protective film is attached to the second end of the single battery 30 and all the side walls 12 to protect the single battery.

[0067] According to the single-cell battery provided in the embodiments of this application, the cell 30 is also provided with a gas guiding channel. The gas guiding channel can extend along the Z-direction, that is, the height direction of the single-cell battery, and the gas guiding channel can communicate with the accommodating gap 46. As an example, when the cell 30 is a wound core, a hollow tubular structure can be left in the middle of the wound core as a gas guiding channel. In addition, other channels connecting the upper and lower ends of the cell 30 can also be provided inside the cell 30, such as channels provided on the positive and negative electrode plates and the separator, for gas circulation. According to the single-cell battery provided in the embodiments of this application, the gas guiding channel allows the gas at the top of the single-cell battery to be better conducted into the accommodating gap 46 of the insulating support 40. In addition, a gas guiding channel extending along the Z-direction can also be provided on the inner wall of the casing to allow gas to flow between the first end and the second end of the cell.

[0068] In an embodiment, such as Figure 9 As shown, the bottom wall 11 may be provided with a groove 11a, the opening of which may face the insulating support 40 in the Z direction. The groove 11a has a groove wall 11b in the Z direction, and the groove wall 11b is provided with an explosion-proof hole 11c that extends through the Z direction. The explosion-proof valve 50 is disposed on the groove wall 11b and closes the explosion-proof hole 11c. The groove 11a forms the aforementioned second space 70 between the explosion-proof valve 50 and the insulating support 40. Due to the opening of the groove 11a, a second space 70 is formed between the explosion-proof valve 50 and the insulating support 40 in the Z direction, thereby allowing gas to reach the location of the explosion-proof valve 50 through the communication between the receiving gap 46 and the second space 70.

[0069] In this embodiment, the groove opening can completely cover the second through hole 44 provided on the second layer plate 43 to ensure that these second through holes 44 can directly connect to the accommodating gap 46 and the second space 70.

[0070] According to a second aspect of the embodiments of this application, a battery pack is provided, including the single battery cells as described above. In the embodiments, the battery pack may include multiple single battery cells, and the battery pack may also include a housing, wherein the multiple single battery cells may be arranged in an array within the housing.

[0071] According to a third aspect of the embodiments of this application, an electrical device is provided, including the battery pack as described above. In the embodiments, the electrical device may be, for example, a vehicle, which may be driven at least partially by the battery pack, i.e., the vehicle may be a partially electrically driven vehicle or a purely electric vehicle.

[0072] The above are merely preferred embodiments of this application and do not limit the scope of protection of this application. All equivalent structural transformations made based on the innovative concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A monobloc battery having a Z direction, characterized in that, The shell (10), the top cover (20), the electric core (30) and the explosion-proof valve (50), the top cover (20) covers the shell (10) in the Z direction, the electric core (30) is arranged in the shell (10), the shell (10) is provided with bottom wall (11), the explosion-proof valve (50) is arranged in the bottom wall (11); The insulating support (40) is located between the electric core (30) and the bottom wall (11) in the Z direction, the insulating support (40) comprises first layer plate (41) and second layer plate (43) arranged in the Z direction, the first layer plate (41) and the second layer plate (43) form the accommodation gap (46) between them; Along the Z direction, the first layer plate (41) is located between the electric core (30) and the second layer plate (43), and the first space (60) is formed between the first layer plate (41) and the top cover (20), the electric core (30) is located in the first space (60), the accommodation gap (46) is communicated with the first space (60), along the Z direction, the second space (70) is further formed between the insulating support (40) and the explosion-proof valve (50), the accommodation gap (46) is communicated with the second space (70). The shell (10) further has a side wall (12) connected with the bottom wall (11), the first layer plate (41) is fixed with the side wall (12); the first layer plate (41) is provided with a plurality of first through holes (42), the first through holes (42) pass through the first layer plate (41), so that the accommodation gap (46) is communicated with the first space (60); and / or 2. The cell according to claim 1, wherein The second layer plate (43) is fixed with the side wall (12) or the bottom wall (11); the second layer plate (43) is provided with a plurality of second through holes (44), the second through holes (44) pass through the second layer plate (43), and the orthogonal projection of at least one second through hole (44) on the plane perpendicular to the Z direction has an overlapping part with the explosion-proof valve (50), so that the accommodation gap (46) is communicated with the second space (70). The insulating support (40) is arranged on the electric core (30) or the bottom wall (11), the insulating support (40) further comprises a connecting column (45), the connecting column (45) is arranged in the accommodation gap (46) and connects the first layer plate (41) and the second layer plate (43), the connecting column (45) is provided with a plurality of and is arranged at intervals.

3. The cell according to claim 1, wherein The first layer plate (41), the second layer plate (43) and the connecting column (45) are integrally arranged or hot melt connected.

4. The cell according to claim 3, wherein The shell (10) further has a side wall (12) connected with the bottom wall (11), the second layer plate (43) is located between the first layer plate (41) and the bottom wall (11) in the Z direction; 5. The cell according to claim 3, wherein ​ The first layer plate (41) has a first plate edge (41a), at least a portion of which is spaced apart from the side wall (12) to communicate the accommodation gap (46) with a side of the first layer plate (41) facing the battery cell (30); and / or the second layer plate (43) has a second plate edge (43a), at least a portion of which is spaced apart from the side wall (12) to communicate the accommodation gap (46) with a side of the second layer plate (43) facing the explosion-proof valve (50).

6. The cell according to claim 1, wherein The battery cell (30) has a first end and a second end in the Z direction, the first end facing the top cover (20), the second end facing the explosion-proof valve (50), and the first layer plate (41) is fixed to the second end of the battery cell (30).

7. The cell according to claim 6, wherein The single battery further comprises a protective film, the second end is attached with the protective film, and the first layer plate (41) is connected to the protective film.

8. The monobloc cell according to any one of claims 1 to 7, characterized in that, The battery cell (30) is further provided with a gas guide channel, the gas guide channel extends along the Z direction, and the gas guide channel communicates with the accommodation gap (46).

9. The monobloc cell according to any one of claims 1 to 7, characterized in that, The bottom wall (11) is provided with a groove (11a), an opening of the groove (11a) is in the Z direction and faces the insulation support (40); the groove (11a) has a groove wall (11b) in the Z direction, the groove wall (11b) is provided with an explosion-proof hole (11c) penetrating along the Z direction, the explosion-proof valve (50) is arranged on the groove wall (11b) and closes the explosion-proof hole (11c), and the groove (11a) forms the second space (70) between the explosion-proof valve (50) and the insulation support (40).

10. A battery pack, characterized by, The battery cell as claimed in any one of claims 1-9.

11. An electrical device, characterized by The battery pack as claimed in claim 10. The battery pack as claimed in claim 10.

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