Battery pack and vehicle

Abstract

The utility model relates to a battery pack and a vehicle. The battery pack comprises a shell; the partition beam is arranged in the shell, the partition beam is provided with a plurality of hanging parts which are arranged at intervals, the hanging parts divide the partition beam into a plurality of beam sections, and the hanging parts are used for connecting an upper cover and a bottom plate of the shell; and the battery unit is arranged in the shell, and the size of the hanging part is larger than that of the beam section in the thickness direction of the beam section. The partition beam is connected with the upper cover and the bottom plate of the shell through the hanging part, and the hanging part is larger than the beam section in size and used for connecting the upper cover and the bottom plate in the thickness direction of the beam section, so that the thickness of the beam section can be greatly reduced; the partition beam can still be connected with the upper cover and the bottom plate of the shell while the occupied space of the partition beam is reduced, that is, the capacitance of the battery pack is effectively improved while the structural strength and functional diversity of the battery pack are ensured, and the cruising ability is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, and particularly relates to a battery pack and a vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, people have higher and higher requirements for the safety and functional diversification of battery packs. In the related art, a partition beam can be arranged in the battery pack to divide the internal space of the battery pack into at least two areas according to requirements, so as to improve the structural strength and functional diversification of the battery pack. However, since the upper end face and the lower end face of the partition beam need to be directly provided with threaded holes to connect the partition beam with the upper cover and the bottom plate of the shell through bolts, the thickness of the partition beam is usually large, for example, 25 mm, which will cause the partition beam to occupy a large battery space in the battery pack, thereby affecting the capacity of the battery pack and resulting in poor endurance. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides a battery pack and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a battery pack is provided, comprising:

[0005] a shell;

[0006] a partition beam arranged in the shell, the partition beam having a plurality of mounting portions arranged at intervals, the plurality of mounting portions dividing the partition beam into a plurality of beam segments, the mounting portions being used to connect an upper cover and a bottom plate of the shell; and

[0007] a battery cell arranged in the shell,

[0008] wherein in a thickness direction of the beam segment, a size of the mounting portion is greater than a size of the beam segment.

[0009] Optionally, the mounting portion comprises a columnar body extending in a height direction, and fastening holes arranged at a top end and a bottom end of the columnar body,

[0010] wherein positions corresponding to the fastening holes of the upper cover and the bottom plate are respectively provided with connecting holes, and the mounting portion further comprises a fastener for sequentially passing through the connecting holes and the fastening holes.

[0011] Optionally, the fastener comprises a large head portion, a rod portion connected to the large head portion, and a sealing member sleeved on the rod portion and abutting against the large head portion.

[0012] Optionally, the thickness of the beam segment is 5-10 mm, the columnar body is configured as a cylinder and the radius of the cylinder is 8-12 mm, and the diameter of the fastening hole is 4-6 mm.

[0013] Optionally, the battery unit comprises a plurality of battery cells, the plurality of battery cells have the same capacity, the plurality of battery cells comprise a plurality of first battery cells adjacent to the partition beam and a plurality of second battery cells away from the partition beam, wherein the distance between two adjacent columnar bodies is equal to N times the width of the second battery cell, wherein N is an integer and is greater than or equal to 1.

[0014] Optionally, the first battery cell adjacent to the columnar body is provided with a chamfer which avoids the columnar body.

[0015] Optionally, the chamfer is a round chamfer, and the radius of the round chamfer is 10mm-25mm, and in the thickness direction of the beam segment, the size of the first battery cell is 2mm-5mm larger than the size of the second battery cell.

[0016] Optionally, in the length direction of the beam segment, the size of the first battery cell is smaller than the size of the second battery cell, so as to reserve an avoidance space between two first battery cells located on the same side of the partition beam and on both sides of the columnar body to avoid the columnar body.

[0017] Optionally, in the thickness direction of the beam segment, the size of the first battery cell is larger than the size of the second battery cell.

[0018] Optionally, the distance between the battery unit and the partition beam is 2mm-5mm, and a buffer is arranged between the battery unit and the partition beam.

[0019] Optionally, a first sealing layer is coated between the bottom surface of the partition beam and the bottom plate, and a second sealing layer is coated between the top surface of the partition beam and the upper cover.

[0020] Optionally, the shell further comprises a surrounding frame, the upper cover and the bottom plate are respectively buckled on two sides of the surrounding frame, and two ends of the partition beam abut against the surrounding frame.

[0021] Optionally, the partition beam is a middle longitudinal beam, the battery unit comprises a plurality of battery modules, and the plurality of battery modules are respectively located on both sides of the middle longitudinal beam, wherein any one of the plurality of battery modules can be charged and discharged individually, and part or all of the plurality of battery modules can be electrically connected as a whole to be charged and discharged.

[0022] According to a second aspect of the embodiments of the present disclosure, a vehicle is provided, comprising the above-mentioned battery pack.

[0023] The technical scheme provided by the embodiment of the present disclosure can have the following beneficial effects: multiple mounting portions are arranged on the partition beam in sequence and at intervals, so as to divide the partition beam into multiple beam segments, and the mounting portions are used to connect the partition beam with the upper cover and the bottom plate of the shell. Since the size of the mounting portion is greater than the size of the beam segment in the thickness direction of the beam segment and is used to connect the upper cover and the bottom plate, the beam segment does not need to be provided with a connecting structure for connecting the upper cover and the bottom plate, so that the thickness of the beam segment can be greatly reduced, and the connection between the partition beam and the upper cover and the bottom plate of the shell is realized while reducing the space occupied by the partition beam in the battery pack, that is, the capacity of the battery pack is effectively improved while the structural strength and the functional diversity of the battery pack are ensured, and the endurance capability is improved.

[0024] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] Figure 1 is a schematic diagram of a battery pack according to the present disclosure;

[0027] Figure 2 is Figure 1 is an exploded view of the battery pack shown in FIG. 1;

[0028] Figure 3 is Figure 1 is a schematic diagram of the internal structure of the battery pack shown in FIG. 1;

[0029] Figure 4 is a schematic diagram of a partition beam according to the present disclosure;

[0030] Figure 5 is a schematic diagram of a fastener according to the present disclosure;

[0031] Figure 6 is Figure 3 is a top view of the internal structure of the battery pack shown in FIG. 1;

[0032] Figure 7 is Figure 6 is a schematic diagram of the first battery cell of the battery pack shown in FIG. 1;

[0033] Figure 8 is a top view of the internal structure of another battery pack according to the present disclosure.

[0034] LIST OF ELEMENTS

[0035] 11 - upper cover; 12 - bottom plate; 13 - surrounding frame; 2 - partition beam; 21 - beam segment; 22 - mounting portion; 221 - fastening hole; 222 - columnar body; 223 - fastener; 2231 - large head portion; 2232 - rod portion; 2233 - sealing member; 3 - battery cell; 301 - battery module; 31 - first battery cell; 32 - second battery cell; 4 - chamfer; 5 - avoidance space. DETAILED DESCRIPTION

[0036] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or analogous elements. The embodiments described in the following exemplary embodiments are not meant to represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0037] REFERENCE Figures 1-8 The present disclosure exemplarily shows a battery pack, which includes a housing, a partition beam 2 disposed in the housing, and a battery cell 3 disposed in the housing, the battery cell 3 can include a plurality of battery cells to be mentioned below. The partition beam 2 has a plurality of mounting portions 22 arranged at intervals, the plurality of mounting portions 22 separate the partition beam 2 into a plurality of beam segments 21, and the mounting portions 22 are used to connect the upper cover 11 and the bottom plate 12 of the housing. Among them, in the thickness direction of the beam segment 21, the size of the mounting portion 22 is greater than the size of the beam segment 21. Here, the "thickness direction of the beam segment 21" refers to the direction in the horizontal plane perpendicular to the height direction and perpendicular to the length direction of the beam segment 21, and the size of the beam segment 21 in this direction is the thickness of the beam segment 21. The size of the mounting portion 22 refers to the maximum size of the mounting portion 22 in this thickness direction, for example, when the mounting portion 22 is a cylinder, the size is the diameter thereof. The present disclosure does not limit the specific structure of the mounting portion 22 and the connection mode of the mounting portion 22 with the upper cover 11 and the bottom plate 12, which will be introduced below.

[0038] In the embodiments of the present disclosure, the plurality of mounting portions 22 and the plurality of beam segments 21 can be integrally formed. In addition, in some other embodiments, the plurality of mounting portions 22 and the plurality of beam segments 21 can also be formed respectively and formed into a whole through welding or other process means.

[0039] The present disclosure does not limit the number of the partition beam 2, which can be one, two, three, etc. It can be used as a longitudinal beam, a transverse beam, etc., and can be adaptively designed according to actual needs.

[0040] By using the above technical solutions, the partition beam 2 is provided with multiple mounting parts 22 which are sequentially spaced apart to divide the partition beam 2 into multiple beam segments 21, and the mounting part 22 is used to connect the partition beam 2 with the upper cover 11 and the bottom plate 12 of the shell. Since the size of the mounting part 22 is greater than the thickness of the beam segment 21 in the thickness direction of the beam segment 21 and is used to connect the upper cover 11 and the bottom plate 12, the beam segment 21 does not need to be provided with a connecting structure for connecting with the upper cover 11 and the bottom plate 12, so that the thickness of the beam segment 21 can be greatly reduced, the connection of the partition beam 2 with the upper cover 11 and the bottom plate 12 of the shell is realized, and the space occupied by the partition beam 2 in the battery pack is reduced, that is, the capacity of the battery pack is effectively improved while the structural strength and functional diversity of the battery pack are ensured, and the endurance capability is improved.

[0041] With reference to Figures 2-4 In the embodiments of the present disclosure, the mounting part 22 can include a columnar body 222 (such as a cylinder, a cuboid, etc.) extending in a height direction, and fastening holes 221 provided at the top end and the bottom end of the columnar body 222. The fastening holes 221 can be integrally formed with the columnar body 222, or can be separately processed later. The height direction here refers to a direction perpendicular to the ground when the battery pack is installed on a vehicle, the top end refers to an end away from the ground, and the bottom end refers to an end close to the ground. The positions corresponding to the fastening holes 221 of the upper cover 11 and the bottom plate 12 can be respectively provided with connecting holes (not shown in the figure), and the mounting part 22 can further include fasteners 223 for sequentially passing through the connecting holes and the fastening holes 221. By sequentially passing through the corresponding connecting holes and the fastening holes 221 through the fasteners 223, the mounting part 22 can be fixedly connected with the upper cover 11 and the bottom plate 12, respectively. The fasteners 223 can be bolts, and in this case, the fastening holes 221 can be threaded holes. It should be noted that in the embodiments of the present disclosure, the fastening holes 221 at the top end and the bottom end of the same columnar body 222 can be blind holes, respectively. In addition, in some other embodiments, the fastening holes 221 at the top end and the bottom end of the same columnar body 222 can also be communicated (i.e., through holes). When the fastening holes 221 at the top end and the bottom end are communicated with each other, the number of fasteners 223 can be one, which can sequentially pass through the bottom plate 12, the fastening holes 221 and the upper cover 11. When the two are blind holes, respectively, the number of fasteners 223 is two and respectively extends into the corresponding fastening holes 221.

[0042] With reference to Figure 5In the embodiments of the present disclosure, the fastener 223 can include a large head 2231, a rod portion 2232 connected to the large head 2231, and a sealing member 2233 sleeved on the rod portion 2232 and abutting against the large head 2231, which can be, for example, an O-ring, a gasket, or the like. By arranging the sealing member 2233, when the fastener 223 is installed in place, the sealing member 2233 can seal the shell of the battery pack, preventing external impurities, moisture, and the like from entering, thereby improving the service life and safety performance of the battery.

[0043] In the embodiments of the present disclosure, the thickness of the beam segment 21 can be 5-10 mm, for example, 5 mm, 6 mm, 8 mm, 10 mm, or the like, the cylindrical body 222 can be configured as a cylinder and the radius of the cylinder can be 8-12 mm, for example, 8 mm, 10 mm, 12 mm, or the like, and the diameter of the fastening hole 221 can be 4-6 mm, for example, 4 mm, 5 mm, 6 mm, or the like. By making the diameter of the cylindrical body 222 greater than the diameter of the fastening hole 221, the fastening hole 221 can be arranged on the top end face and the bottom end face, respectively. And the thickness of the beam segment 21 is set to be less than the diameter of the cylindrical body 222, so as to reduce the size of the space it occupies in the shell, and it does not need to be provided with a fastening hole 221, so its thickness can be close to or less than the diameter of the fastening hole 221, so as to release the accommodation space in the shell to the greatest extent.

[0044] The present disclosure does not limit the spacing between the two adjacent cylindrical bodies 222, for example, in the embodiments shown in Figure 6 and Figure 8 The battery unit 3 can include a plurality of battery monomers. In order to facilitate the monitoring and adjustment of the state of the battery monomers by the BMS and the like, the capacities of the plurality of battery monomers can be the same. The plurality of battery monomers can include a plurality of first battery monomers 31 adjacent to the partition beam 2 and a plurality of second battery monomers 32 away from the partition beam 2. The spacing between the two adjacent cylindrical bodies 222 can be equal to N times the width of the second battery monomer 32, where N is an integer greater than or equal to 1, for example, 1, 2, 3, or the like. Here, the "width" refers to the dimension of the battery monomer 32 along the length direction of the partition beam 2, i.e. Figure 6 and Figure 8 the direction of the corresponding arrow in the middle. The spacing between the two adjacent cylindrical bodies 222 refers to the distance between the central axes of the two cylindrical bodies 222. In this way, an integer number of battery monomers can be arranged between the two adjacent cylindrical bodies 222, for example, in the embodiments shown in Figure 6 and Figure 8In the illustrated embodiment, the number of battery cells between two adjacent columnar bodies 222 can be two. During the design of the battery pack, in order to improve the electric capacity of the battery pack, the first battery cell 31 needs to be as close as possible to the beam segment 21, and the two adjacent first battery cells 31 need to be as close as possible. The design of the present disclosure can make the columnar body 222 correspond to the angular position of the four first battery cells 31 around it, so as to facilitate the design of the first battery cell 31 to avoid the columnar body 222, ensure the consistency of each first battery cell 31, and facilitate mass production. The specific avoidance method can be referred to below.

[0045] With reference to Figure 6 and Figure 7 In this embodiment, the first battery cell 31 adjacent to the columnar body 222 can be provided with a chamfer 4 avoiding the columnar body 222, so that the first battery cell 31 can be as close as possible to the beam segment 1 and the adjacent other battery cell 31 without interference with the columnar body 222.

[0046] Specifically, in the embodiment of the present disclosure, the chamfer 4 can be a round chamfer, and the radius of the round chamfer is 10mm-25mm, such as 10mm, 15mm, 20mm, 25mm, etc. In the thickness direction of the beam segment 21, the size of the first battery cell 31 can be 2mm-5mm larger than that of the second battery cell 32, such as 2mm, 4mm, 5mm, etc. The specific design can be designed according to the actual demand, as long as the electric capacity of the first battery cell 31 and the second battery cell 32 is consistent. Alternatively, in some other embodiments, the energy density of the first battery cell 31 can also be set to be greater than that of the second battery cell 32 to ensure that the electric capacity of the two is consistent. In addition, in some other embodiments, the chamfer 4 can also be a bevel chamfer, which is not limited in the present disclosure. Here, the aforementioned "in the thickness direction of the beam segment 21" refers to the length of the two battery cells, and correspondingly, in the length direction of the beam segment 21, it refers to the width of the battery cell. The length and width can be specifically referred to the corresponding arrows in the drawings. In addition, it should be noted that, in Figure 6 In the illustrated embodiment, since the size difference of the two battery cells in the length direction is small, the length difference of the two is not exaggerated in the drawings. In fact, the two need to have the above-mentioned length difference, and the specific difference can be adaptively designed according to the actual situation.

[0047] In addition to the above-mentioned chamfer 4, with reference to Figure 8In this embodiment, along the length of the beam segment 21, the size of the first battery cell 31 can be smaller than the size of the second battery cell 32, so that a clearance space 5 can be reserved between the two first battery cells 31 located on the same side of the partition beam 2 and on both sides of the column 222 to avoid the column 222. Here, as mentioned above, "along the length of the beam segment 21" corresponds to the width of the battery cell, which can be specifically referred to in the direction of the arrow in the attached drawings.

[0048] Furthermore, in order to ensure that the first battery cell 31 and the second battery cell 32 have the same capacity, in Figure 8 In the illustrated embodiment, the size of the first battery cell 31 can be larger than the size of the second battery cell 32 in the thickness direction of the beam segment, thereby compensating for the shorter width compared to the second battery cell 32. Specifically, when the height and internal density of the first battery cell 31 and the second battery cell 32 are the same, L*H=l*h, where L and H are the length and width of the second battery cell 32, and l and h are the length and width of the first battery cell 31. Furthermore, in some other embodiments, when the lengths of the first battery cell 31 and the second battery cell 32 are the same, the capacity of each battery cell can be made consistent by setting the energy density of the first battery cell 31 to be greater than the energy density of the second battery cell 32.

[0049] Furthermore, in some embodiments, l = LR can also be satisfied simultaneously, where R is the radius of the columnar body 222. Of course, in other embodiments, l can be less than LR. In this case, the length of the first battery cell 31 needs to be appropriately increased further.

[0050] exist Figures 6-8 In the illustrated embodiment, multiple battery cells can be glued to the base plate 12, and their height and internal energy density are equal.

[0051] In the embodiments of this disclosure, the distance between the battery unit 3 and the partition beam 2 can be 2mm-5mm, such as 2mm, 3mm, 4mm, 5mm, etc., and a buffer (not shown in the figure) can be provided between the battery unit 3 and the partition beam 2. The buffer can be cushioning foam, cushioning rubber, etc. This design can prevent rigid collision between the battery unit 3 and the partition beam 2 when the battery pack is impacted, thus avoiding damage caused by the impact. The buffer can play a buffering and protective role against the impact.

[0052] In the embodiments of this disclosure, a first sealing layer (not shown in the figure) can be applied between the bottom surface of the partition beam 2 and the bottom plate 12, and a second sealing layer (not shown in the figure) can be applied between the top surface of the partition beam 2 and the top cover 11. By providing the first and second sealing layers, seals can be formed between the partition beam 2 and the top cover 11 and the bottom plate 12, respectively, thereby achieving a sealing effect on the battery cells located on both sides of the partition beam 2 and preventing the adjacent battery cells from being affected in the event of thermal failure or other situations.

[0053] In embodiments of this disclosure, the first and second sealing layers can be sealants. In this case, in addition to their sealing function, they can also strengthen the connection between the partition beam 2 and the upper cover 11 and the bottom plate 12, thereby improving the overall strength of the battery pack. Furthermore, in some other embodiments, the first and second sealing layers can also be sealing gaskets placed between the partition beam 2 and the upper cover 11 and the bottom plate 12, and this disclosure does not limit this to such cases.

[0054] This disclosure does not limit the specific structure of the housing, for example in Figure 2 In the illustrated embodiment, the housing may further include an enclosing frame 13, the top cover 11 and the bottom plate 12 may be respectively fastened to the two sides of the enclosing frame 13, the two ends of the partition beam 2 may abut against the enclosing frame 13, and the two ends of the partition beam 2 may be sealed with the enclosing frame 13.

[0055] This disclosure does not limit the type of partition beam 2, for example, in Figure 3 , Figure 6 and Figure 8 In this embodiment, the partition beam 2 can be a central longitudinal beam, and the battery unit 3 can include multiple battery modules 301, which can be located on both sides of the central longitudinal beam. Any one of the multiple battery modules 301 can be charged and discharged independently, and some or all of the multiple battery modules 301 can be electrically connected as a whole for charging and discharging. Here, the electrical connection can be series or parallel. For example, in an embodiment of this disclosure, the number of battery modules 301 is two, which can be connected in series and parallel to switch the output voltage, thus forming a dual-bank battery. The two battery modules 301 can be charged and discharged simultaneously or individually.

[0056] According to a second aspect of this disclosure, a vehicle is provided that includes the battery pack described above, and since the vehicle has all the beneficial effects of the battery pack described above, further details are omitted here.

[0057] In the detailed description above, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific aspects in which the disclosure can be practiced. In this regard, directional terminology, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and other commonly used terms, are used herein for the purpose of illustration only and are not intended to be limiting. Because the described devices can be positioned in a number of different orientations, the directional terminology can be used for illustration purposes only and is not limiting. It is to be understood that other aspects can be utilized and structural or logical changes can be made without departing from the scope of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense.

[0058] It is to be understood that the features of the various aspects of the present disclosure described herein can be combined with each other, unless specifically noted otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items; similarly, "at least one of' includes any and all combinations of one or more of the associated listed items.

[0059] It should be understood that, unless otherwise specifically stated and limited, the terms "joined," "attached," "mounted," "connected," "linked," "fixed," and the like, as used in the embodiments of the disclosure, are to be construed broadly, e.g., as either fixed connections, or as removable connections, or as integral connections; as either mechanical connections, or as electrical connections, or as communicative connections with each other; as either direct connections, or as indirect connections via intervening mediums; as internal communication or interaction between two elements, or as interaction between two elements, unless specifically and explicitly limited otherwise. The specific meaning of the above terms in this document can be understood by those of ordinary skill in the art according to the specific context.

[0060] Further, the word "over" as used in reference to a component, element, or material layer "over" another component, element, or material layer, is used herein to mean that the component, element, or material layer is positioned "indirectly" on the other component, element, or material layer such that one or more additional components, elements, or layers are arranged between the other component, element, or material layer and the component, element, or material layer. However, the word "over" as used in reference to a component, element, or material layer "over" another component, element, or material layer, can optionally also mean that the component, element, or material layer is positioned "directly" on the other component, element, or material layer, e.g., in direct contact with the other component, element, or material layer.

[0061] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0063] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0064] Likewise, although the present disclosure has been described and illustrated with respect to one or more implementations, equivalent alterations and modifications will become apparent to those skilled in the art that do not depart from the true spirit and scope of the disclosure. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms (including a reference to a "means") used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the described function (e.g., a functional equivalent), even though not structurally equivalent to the disclosed structure. In addition, although a particular feature of the disclosure can have been disclosed with respect to only one of several implementations, other implementations can include the particular feature. For example, the disclosure can be implemented with respect to other implementations that incorporate the particular feature, and that implement other features as disclosed herein, and each of the various implementations have a reasonable expectation of support. Furthermore, to the extent that the terms "includes", "including", "has", "have", "having", or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0065] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features of the disclosure disclosed herein. It is intended that the present disclosure be considered as including any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such steps, compositions, components, and / or elements known in the art to be appropriate. It is specifically intended that the present disclosure include all such modifications and alterations in the application, processes, and procedures as fall within the usual scope of the technology and are appreciated by those skilled in the art. The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0066] It is to be understood that the present disclosure is not limited to the precise construction described and shown herein and that changes can be made in various embodiments without departing from the scope of the disclosure. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A battery pack, characterized by, The battery pack comprises: a shell; a partition beam arranged in the shell, the partition beam having a plurality of mounting portions arranged at intervals, the plurality of mounting portions separating the partition beam into a plurality of beam segments, the mounting portions being used to connect an upper cover and a bottom plate of the shell; and a battery unit arranged in the shell, wherein in a thickness direction of the beam segments, a size of the mounting portions is greater than a size of the beam segments.

2. The battery pack of claim 1, wherein, The mounting portions comprise columnar bodies extending in a height direction, and fastening holes arranged at top ends and bottom ends of the columnar bodies, wherein the upper cover and the bottom plate are respectively provided with connecting holes at positions corresponding to the fastening holes, and the mounting portions further comprise fasteners for sequentially passing through the connecting holes and the fastening holes.

3. The battery pack of claim 2, wherein, The fasteners comprise a large head portion, a rod portion connected to the large head portion, and a sealing member sleeved on the rod portion and abutting against the large head portion.

4. The battery pack of claim 2, wherein, The thickness of the beam segments is 5-10 mm, the columnar bodies are configured as cylinders and the radius of the cylinders is 8-12 mm, and the diameter of the fastening holes is 4-6 mm.

5. The battery pack of claim 2, wherein, The battery unit comprises a plurality of battery cells, the plurality of battery cells having the same capacity, the plurality of battery cells comprising a plurality of first battery cells adjacent to the partition beam and a plurality of second battery cells away from the partition beam, wherein a spacing between two adjacent columnar bodies is equal to N times the width of the second battery cells, where N is an integer and is greater than or equal to 1.

6. The battery pack of claim 5, wherein, The first battery cells adjacent to the columnar bodies are provided with chamfers avoiding the columnar bodies.

7. The battery pack of claim 6, wherein, The chamfers are round chamfers, and the radius of the round chamfers is 10-25 mm, in the thickness direction of the beam segments, the size of the first battery cells is greater than the size of the second battery cells by 2-5 mm.

8. The battery pack of claim 5, wherein, In the length direction of the beam segments, the size of the first battery cells is smaller than the size of the second battery cells, so as to reserve an avoiding space between two first battery cells located on the same side of the partition beam and on both sides of the columnar bodies, the avoiding space avoiding the columnar bodies.

9. The battery pack of claim 8, wherein, In the thickness direction of the beam segments, the size of the first battery cells is greater than the size of the second battery cells.

10. The battery pack of claim 1, wherein, The distance between the battery unit and the partition beam is 2-5 mm, and there is a buffer between the battery unit and the partition beam.

11. The battery pack of claim 1, wherein, A first sealing layer is coated between a bottom surface of the partition beam and the bottom plate, and a second sealing layer is coated between a top surface of the partition beam and the upper cover.

12. The battery pack of claim 1, wherein, The shell further comprises a surrounding frame, the upper cover and the bottom plate are respectively buckled on two sides of the surrounding frame, and two ends of the partition beam abut against the surrounding frame.

13. The battery pack of any one of claims 1-12, wherein, The partition beam is a center beam, the battery unit comprises a plurality of battery modules, the plurality of battery modules are respectively located on two sides of the center beam, wherein any one of the plurality of battery modules can be charged and discharged individually, and part or all of the plurality of battery modules can be electrically connected as a whole to be charged and discharged.

14. A vehicle characterized by comprising: The battery pack of claim 13 is included.

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