Battery box, battery and electric device

Abstract

The utility model discloses a battery box, a battery and a power utilization device, the battery box comprises a first box body and a connecting piece, the first box body is provided with an accommodating space for accommodating a battery monomer, the side part, back to the accommodating space, of the first box body is provided with a fixing part, and the fixing part is provided with a first connecting hole; the connecting piece is provided with a threaded hole used for being in threaded connection with a bolt, and the first connecting hole is opposite to the threaded hole so that the bolt can penetrate through the first connecting hole and be in threaded connection with the threaded hole.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery box, a battery and a power consumption device. BACKGROUND

[0002] Battery packs are widely used in various electronic devices, such as mobile phones, notebook computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools.

[0003] In the research of battery technology, how to reduce the size of the battery and improve the volumetric energy density of the battery is an important research direction. SUMMARY

[0004] The purpose of the embodiments of the application is to provide a battery box, a battery and a power consumption device to improve the volumetric energy density of the battery.

[0005] The technical solution adopted by the embodiments of the application is:

[0006] In a first aspect, a battery box is provided, which comprises a first box body and a connecting piece. The first box body is provided with a receiving space for accommodating a battery monomer. The side of the first box body away from the receiving space is provided with a fixing portion. The fixing portion is provided with a first connecting hole. The connecting piece is provided with a threaded hole for screwing with a bolt. The first connecting hole and the threaded hole are oppositely arranged, so that the bolt passes through the first connecting hole and is screwed with the threaded hole.

[0007] The battery box of the embodiments of the application is provided with a threaded hole matched with the bolt, so that the connecting piece can replace the nut and be connected with the bolt. At the same time, the connecting piece can also be designed according to a size smaller than the standard size of the nut, so as to save the space on the side of the first box body facing the fixing portion, thereby reducing the size of the battery box, reducing the size of the battery and improving the volumetric energy density of the battery.

[0008] In an embodiment, the connecting piece is a steel piece, an aluminum alloy piece or a copper alloy piece.

[0009] On the basis of meeting the connecting strength of the bolt and the connecting piece, the size of the connecting piece can be made smaller, thereby further saving the space occupied by the first box body, reducing the size of the battery box and improving the volumetric energy density of the battery.

[0010] In an embodiment, the receiving space and the fixing portion are respectively located on opposite sides of the first box body along a first direction.

[0011] By adopting the technical solution of the embodiment, the size of the connecting piece in the first direction can be designed to be smaller, the space in the first direction is saved, and the battery can be applied to a power consumption device with more stringent requirements on the size in the first direction.

[0012] In one embodiment, the axis of the first connecting hole is parallel to the second direction, and the first direction is perpendicular to the second direction.

[0013] By adopting the technical scheme of this embodiment, the bolt is screwed with the threaded hole after passing through the first connecting hole along the second direction; and the second direction is perpendicular to the first direction, so the bolt can be installed on the other side of the first box along the first direction, thereby facilitating the installation of the bolt.

[0014] In one embodiment, the nominal diameter of the threaded hole is D, and the size of the connecting piece in the first direction is L, wherein 1.1≤L / D≤2, preferably 1.2≤L / D≤1.7.

[0015] By adopting the technical scheme of this embodiment, the reliability of the connection of the connecting piece and the effect of saving space can be considered at the same time, thereby improving the use reliability and volume energy density of the battery.

[0016] In one embodiment, the connecting piece is a long strip structure extending along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0017] By adopting the technical scheme of this embodiment, the connecting piece is in a long strip structure, so that the connecting piece has a large size in the third direction, and the structural reliability of the connecting piece is good, thereby improving the reliability of the connection with the bolt; in addition, multiple bolt holes can be arranged in the third direction of the connecting piece, thereby improving the reliability of the connection with the second box or the mounting cooperating piece.

[0018] In one embodiment, the number of threaded holes is multiple, and the multiple threaded holes are arranged at intervals along the third direction.

[0019] By adopting the technical scheme of this embodiment, the connecting piece can be screwed with multiple bolts and multiple threaded holes, so that the multi-point connection of the first box and the second box or the multi-point connection of the first box and the mounting cooperating piece can be realized, thereby improving the connection reliability and the use reliability of the battery.

[0020] In one embodiment, the fixing part is configured with a mounting cavity for the first connecting hole to communicate, and the connecting piece is located in the mounting cavity.

[0021] By adopting the technical scheme of this embodiment, the connecting piece is located in the mounting cavity of the fixing part, so that the space inside the fixing part can be fully utilized, which is conducive to reducing the size of the first box and improving the volume energy density of the battery; in addition, the fixing part can also play a protective role on the connecting piece, thereby improving the connection reliability.

[0022] In one embodiment, the connecting piece is bonded to the cavity wall surface of the mounting cavity.

[0023] By adopting the technical scheme of the embodiment, the connecting piece is fixed in the mounting cavity in a bonding manner, on the one hand, the fixation of the connecting piece is realized, and the screwing operation of the bolt and the threaded hole is simpler and faster; on the other hand, the fixation is realized in a bonding manner, the fixation operation is simple, and the assembly efficiency is improved.

[0024] In one embodiment, at least one of the opposite surfaces of the connecting piece along the first direction abuts against the cavity wall surface of the mounting cavity.

[0025] By adopting the technical scheme of the embodiment, at least one of the opposite surfaces of the connecting piece along the first direction abuts against the cavity wall surface of the mounting cavity, the space of the mounting cavity in the first direction can be saved, the size of the first box body in the first direction is reduced, the size of the battery in the first direction is reduced, and the volume energy density of the battery is improved.

[0026] In one embodiment, the threaded hole comprises a first threaded hole section and a second threaded hole section connected in communication; the connecting piece comprises a body and a protruding portion connected with each other, the protruding portion protrudes from the surface of the body, the body is configured with the first threaded hole section, and the protruding portion is configured with the second threaded hole section.

[0027] By adopting the technical scheme of the embodiment, the setting of the protruding portion can reduce the material accumulation of the connecting piece, and the lightweight design is facilitated.

[0028] In one embodiment, the height of the protruding portion protruding from the body is h, the nominal diameter of the threaded hole is D, and 0.5≤h / D≤2; preferably, 0.7≤h / D≤1.5.

[0029] By adopting the technical scheme of the embodiment, the connecting piece can simultaneously consider the reliability of connection and the size of the battery box.

[0030] In one embodiment, the height of the protruding portion protruding from the body is h, and 0.5mm≤h≤50mm; preferably, 5mm≤h≤30mm.

[0031] By adopting the technical scheme of the embodiment, the connecting piece can simultaneously consider the reliability of connection and the size of the battery box.

[0032] In one embodiment, the first box body comprises a plate piece, the receiving space and the fixation portion are respectively located at opposite sides of the plate piece along the first direction; the edge portion of the plate piece is bent and forms a bent structure, and at least part of the bent structure forms the fixation portion; or the first box body further comprises a side frame strip, the side frame strip is connected with the edge portion of the plate piece, and at least part of the side frame strip forms the fixation portion.

[0033] By adopting the technical scheme of the embodiment, the structure of the first box body is simple, and the processing and manufacturing are convenient.

[0034] In one embodiment, the battery box further comprises a second box body connected with the fixing part, and the first box body and the second box body surround to form the accommodation space.

[0035] By adopting the technical scheme of the embodiment, the battery box adopts the structural form of the first box body and the second box body, and has simple structure and simple processing and manufacturing.

[0036] In one embodiment, the second box body is provided with a second connecting hole for the bolt to pass through.

[0037] By adopting the technical scheme of the embodiment, the second box body can directly utilize the threaded holes of the bolt and the connecting piece to realize the connection of the first box body and the second box body, so that other connecting structures are not needed, which is conducive to reducing parts, saving space, and improving the volumetric energy density of the battery.

[0038] In one embodiment, the fixing part is connected with a connecting part, the connecting part protrudes from the surface of the plate part facing the accommodation space, the connecting part is located in the second box body, and a sealing piece is arranged between the connecting part and the inner wall of the second box body.

[0039] By adopting the technical scheme of the embodiment, the sealing piece is filled between the connecting part and the second box body, which can increase the sealing performance between the first box body and the second box body, improve the use reliability of the battery, and also increase the connecting area of the first box body and the second box body to facilitate the arrangement of the sealing piece, thereby achieving better sealing effect.

[0040] In one embodiment, the plate part is provided with the fixing part on opposite two edge parts in the second direction, and the first direction intersects with the second direction.

[0041] By adopting the technical scheme of the embodiment, the opposite two edge parts of the plate part are both provided with the fixing part, which can increase the connecting points of the first box body and the second box body, improve the reliability of the connection of the first box body and the second box body, or increase the mounting points of the battery box and improve the reliability of the battery mounting.

[0042] In one embodiment, the first box body further comprises a first sealing plate and a second sealing plate, one of the two edge parts of the plate part distributed opposite in a third direction is connected with the first sealing plate, and the other edge part of the two edge parts of the plate part distributed opposite in the third direction is connected with the second sealing plate; the first sealing plate, the second sealing plate and the plate part jointly surround to form the accommodation space, and the first direction, the second direction and the third direction are perpendicular to each other.

[0043] By adopting the technical scheme of the embodiment, the first box body has simple structure and convenient processing and manufacturing.

[0044] In one embodiment, the first box body further comprises a plurality of mounting beams connected with the plate member, the plurality of mounting beams are located between the two fixing portions, and the plurality of mounting beams are arranged at intervals along a third direction, the first direction, the second direction and the third direction are perpendicular to each other.

[0045] By adopting the technical scheme of this embodiment, the plurality of mounting beams are arranged, which can strengthen the structural strength of the plate member, improve the structural strength of the first box body, and is beneficial to improve the use reliability of the battery and the electric device.

[0046] In one embodiment, the plurality of mounting beams are located at the side of the plate member away from the accommodation space.

[0047] By adopting the technical scheme of this embodiment, the mounting beams are located outside the accommodation space, the mounting beams do not occupy the space of the accommodation space, so that the accommodation space can accommodate more battery monomers, which is beneficial to improve the volumetric energy density of the battery.

[0048] In one embodiment, the first box body further comprises a first module beam and a second module beam for connecting with the battery monomer, the first module beam and the second module beam are located in the accommodation space, the first module beam is connected with one of the two edge portions of the plate member distributed opposite along the third direction, and the second module beam is connected with the other of the two edge portions of the plate member distributed opposite along the third direction.

[0049] By adopting the technical scheme of this embodiment, the first module beam and the second module beam are connected with the battery monomer, so that the first module beam and the second module beam support and fix the battery monomer, which is beneficial to improve the structural strength of the battery box and improve the use reliability of the battery.

[0050] In one embodiment, along the third direction, the first mounting beam is arranged opposite to the first module beam, and / or the last mounting beam is arranged opposite to the second module beam.

[0051] By adopting the technical scheme of this embodiment, the structural strength of the first box body can be improved, which is beneficial to improve the use reliability of the battery.

[0052] In one embodiment, the plate member is a heat exchange member for heat exchange with the battery monomer.

[0053] By adopting the technical scheme of this embodiment, the heat exchange member is directly the plate member of the first box body, so that the plate member does not need to be arranged separately, the number of parts can be reduced, the space can be saved, and the volumetric energy density of the battery can be improved.

[0054] In one embodiment, the fixing portion is used for connecting with the mounting cooperation member through a bolt to realize the mounting of the battery box.

[0055] By adopting the technical scheme of the embodiment, the fixed part can be used as a mounting structure of the battery, and the mounting of the battery is realized through bolts, so that the mounting operation is simple and the mounting efficiency is improved.

[0056] In a second aspect, a battery is provided, including the battery box of the above-mentioned embodiments.

[0057] In a third aspect, a power consumption device is provided, including the battery of the above-mentioned embodiments.

[0058] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only one embodiment of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0060] Figure 1 The structural schematic diagram of the vehicle provided by an embodiment of the present application is shown.

[0061] Figure 2 The structural schematic diagram of the battery provided by another embodiment of the present application is shown. Figure 1 .

[0062] Figure 3 The exploded schematic diagram of the battery shown in Figure 2 .

[0063] Figure 4 The structural schematic diagram of the battery shown in Figure 2 . Figure 2

[0064] Figure 5 The sectional view along the line A-A in Figure 4 .

[0065] Figure 6 The enlarged view of the part B in Figure 5 .

[0066] Figure 7 The structural schematic diagram of the first box body and the connecting piece shown in Figure 3 .

[0067] Figure 8 The sectional view along the line C-C in Figure 7 .​

[0068] Figure 9 Fig. 1 is a schematic view of a battery according to an embodiment of the present application. Figure 8 Fig. 2 is a sectional view along line A-A in Fig. 1.

[0069] Figure 10 Fig. 3 is a schematic view of a first case and a connecting member according to an embodiment of the present application. Figure 7 Fig. 4 is an exploded schematic view of the first case and the connecting member shown in Fig. 3.

[0070] Figure 11 Fig. 5 is a schematic view of the connecting member according to an embodiment of the present application. Figure 10 Fig. 6 is a schematic view of the connecting member according to another embodiment of the present application.

[0071] Figure 12 Fig. 7 is a schematic view of the connecting member according to yet another embodiment of the present application.

[0072] Figure 13 Fig. 8 is a sectional view along line B-B in Fig. 1. Figure 12

[0073] Fig. 9 is a sectional view along line C-C in Fig. 1. Figure 14 Fig. 10 is a schematic view of a battery according to an embodiment of the present application.

[0074] Figure 15 Fig. 11 is a sectional view along line D-D in Fig. 10. Figure 14

[0075] Fig. 12 is a sectional view along line E-E in Fig. 10. Figure 16 Figure 15 Fig. 13 is a schematic view of a first case according to an embodiment of the present application.

[0076] Fig. 14 is an exploded schematic view of the first case shown in Fig. 13. Figure 17 Figure 15 Fig. 15 is a sectional view along line F-F in Fig. 10.

[0077] Figure 18 Fig. 16 is a sectional view along line G-G in Fig. 10. Figure 17

[0078] Fig. 17 is a sectional view along line H-H in Fig. 10. Figure 19 Figure 18 Fig. 18 is a sectional view along line I-I in Fig. 10.

[0079]

[0080] ​​​1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 100, battery cell; 200, battery box; 201, accommodation space; 210, first box body; 211, fixing part; 2111, first connecting hole; 2112, mounting cavity; 212, connecting part; 213, plate member; 2131, plate body part; 2132, bending structure; 21321, first bending section; 21322, second bending section; 21323, third bending section; 21324, fourth bending section; 21325, fifth bending section; 2133, first bending part; 2134, second bending part; 214, side frame strip; 2141, frame body part; 2142, side plate part; 215, first sealing plate; 216, second sealing plate; 217, mounting beam; 218, first module beam; 219, second module beam; 220, connecting piece; 221, threaded hole; 222, body; 223, protruding part; 2211, first threaded hole section; 2212, second threaded hole section; 230, bolt; 240, second box body; 241, second connecting hole; 250, sealing piece. DETAILED DESCRIPTION

[0081] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims and the aforementioned drawings, are intended to cover not exclusive inclusions.

[0083] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0084] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated in a variety of embodiments of the application.

[0085] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects are in an“or” relationship.

[0086] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces). The meaning of“several” is one or more, unless otherwise explicitly specified.

[0087] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the application and simplifying the description, and does not indicate or imply that the devices or elements 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 embodiments of the application.

[0088] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0089] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0090] In the present application, a battery refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. Some batteries can include a battery box for packaging one or more battery cells or a plurality of battery modules, which can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cells or the battery modules.

[0091] In the present application, a battery cell can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc., and the embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto.

[0092] The battery cell or the battery module is usually placed inside the battery box, and the size of the battery box directly determines the size of the battery; therefore, how to reduce the size of the battery box is also an important research topic of the battery; generally, the battery box includes a first box body and a second box body, the second box body is arranged on the first box body, a fixing portion is arranged on the outer side of the first box body, the fixing portion and the second box body are connected through a bolt and a nut to form a receiving space for accommodating the battery cell; or the battery includes a first box body, a fixing portion is arranged on the outer side of the first box body, and the fixing portion is fixed to a mounting cooperating member (for example, a cross beam or a longitudinal beam of a vehicle) through a bolt and a nut to realize the mounting of the battery box.

[0093] However, the nut is a standard part, and the size of the nut is a standard size, and the size of the nut will also affect the size of the battery box; therefore, how to optimize this part of the structure, reduce the size of the battery box, reduce the size of the battery, and improve the volumetric energy density of the battery is also an important research direction.

[0094] Based on this, the embodiments of the present application provide a battery box, a threaded hole is arranged on the connecting piece, and the threaded hole can be screwed with the bolt, so that the connecting piece can replace the nut; at the same time, the connecting piece can not be made according to the size of the nut, that is, the size of the connecting piece can be smaller than the size of the nut, thereby reducing the size of the battery box, reducing the size of the battery, and improving the volumetric energy density of the battery.

[0095] The following embodiments are described by taking a vehicle as an example of a power utilization device according to an embodiment of the present application.

[0096] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 according to an embodiment of the present application is shown in FIG. 1.

[0097] The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle. The vehicle 1000 is internally provided with a battery 1100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 1100 can be used for power supply of the vehicle 1000, for example, the battery 1100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 1200 and a motor 1300, the controller 1200 is used to control the battery 1100 to supply power to the motor 1300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0098] In an embodiment of the present application, the battery 1100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0099] Please refer to Figures 2-6 , Figure 2 The structural schematic diagram of the battery according to another embodiment of the present application is shown in FIG. 2. Figure 1 . Figure 3 As shown in Figure 2 , Figure 4 The structural schematic diagram of the battery according to another embodiment of the present application is shown in FIG. 2. Figure 2 . Figure 2 The cross-sectional view along the line A-A in FIG. 2. Figure 5 The enlarged view of a part of FIG. 2. Figure 4 The enlarged view of a part of FIG. 2. Figure 6 Figure 5 As an embodiment of the battery 1100, the battery 1100 includes a battery box 200 and a battery cell 100, and the battery cell 100 is accommodated in the battery box 200. The battery box 200 is used to provide an accommodation space 201 for the battery cell 100.

[0100] In the battery 1100, the battery cell 100 can be multiple, and the multiple battery cells 100 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 100 are connected in series and in parallel.

[0101] In the battery 1100, the battery cell 100 can be multiple, and the multiple battery cells 100 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 100 are connected in series and in parallel.

[0102] ​In one embodiment, the plurality of battery cells 100 can be directly connected in series or in parallel or in a hybrid manner together, and the whole of the plurality of battery cells 100 is accommodated in the battery box 200. Of course, the battery 1100 can also be in the form of a battery 1100 module in which a plurality of battery cells 100 are first connected in series or in parallel or in a hybrid manner, and a plurality of battery 1100 modules are connected in series or in parallel or in a hybrid manner to form a whole and are accommodated in the box. The battery 1100 can also include other structures, for example, the battery 1100 can also include a busbar component for realizing the electrical connection between the plurality of battery cells 100.

[0103] Each battery cell 100 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 100 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0104] In one embodiment of the present application, a battery box 200 is provided, which includes a first box 210 and a connecting piece 220. The first box 210 is provided with an accommodation space 201 for accommodating battery cells 100. The side of the first box 210 opposite to the accommodation space 201 is provided with a fixing portion 211, and the fixing portion 211 is provided with a first connecting hole 2111. The connecting piece 220 is provided with a threaded hole 221 for screwing with a bolt 230. The first connecting hole 2111 is in communication with the threaded hole 221, so that the bolt 230 passes through the first connecting hole 2111 and is screwed with the threaded hole 221.

[0105] The battery box 200 can adopt various structures.

[0106] In one embodiment, the battery box 200 can include a first box 210 and a second box 240. The first box 210 and the second box 240 are overlapped with each other, and the first box 210 and the second box 240 together define an accommodation space 201 for accommodating battery cells 100. The first box 210 can be a plate-shaped structure, and the second box 240 can be a hollow structure with an opening. The first box 210 is overlapped with the opening side of the second box 240, so that the first box 210 and the second box 240 together define the accommodation space 201. Alternatively, the second box 240 can be a plate-shaped structure, and the first box 210 can be a hollow structure with an opening. The second box 240 is overlapped with the opening side of the first box 210, so that the first box 210 and the second box 240 together define the accommodation space 201. Alternatively, the first box 210 and the second box 240 are both hollow structures with an opening. The opening side of the first box 210 and the opening side of the second box 240 are butted, so that the first box 210 and the second box 240 together define the accommodation space 201. Of course, the battery box 200 formed by the first box 210 and the second box 240 can have various shapes, such as a cylinder, a cuboid, etc.

[0107] In one embodiment, the battery box 200 can also not include the second box body 240, and the first box body 210 has a receiving space 201 formed inside, and the first box body 210 can be directly fixed in the electric device through necessary structures.

[0108] The first box body 210 can refer to an integrated structure, or a structure formed by splicing multiple independently formed sub-components.

[0109] The second box body 240 can refer to an integrated structure, or a structure formed by splicing multiple independently formed sub-components.

[0110] The fixing portion 211 can refer to a portion of the first box body 210 connected with the second box body 240 through the bolt 230, or a portion of the first box body 210 connected with a mounting cooperating part (for example, a cross beam or a longitudinal beam of the vehicle 1000) through the bolt 230; the fixing portion 211 is located on the side of the first box body 210 away from the receiving space 201, that is, the fixing portion 211 is located outside the battery box 200 to facilitate connection.

[0111] The first connecting hole 2111 can refer to a hole structure through which the bolt 230 passes.

[0112] The connecting piece 220 can refer to a part connected with the bolt 230; the connecting piece 220 is provided with a threaded hole 221, which can refer to a hole structure with threads on the inner wall of the hole; the threaded hole 221 and the first connecting hole 2111 are oppositely arranged, that is, the threaded hole 221 and the first connecting hole 2111 are coaxially arranged, so that the bolt 230 can be screwed with the threaded hole 221 after passing through the first connecting hole 2111, thereby achieving connection.

[0113] As an example, in the case where the fixing portion 211 is connected with the second box body 240, the second box body 240 is provided with a second connecting hole 241, and the bolt 230 passes through the first connecting hole 2111 and the second connecting hole 241 and then is screwed with the threaded hole 221 of the connecting piece 220, thereby achieving fixed connection of the first box body 210 and the second box body 240.

[0114] As an example, in the case where the fixing portion 211 is connected with the mounting cooperating part (for example, the cross beam or the longitudinal beam of the vehicle 1000), the mounting cooperating part is provided with a third connecting hole, and the bolt 230 passes through the first connecting hole 2111 and the third connecting hole and then is screwed with the threaded hole 221 of the connecting piece 220, thereby achieving mounting of the battery box 200.

[0115] The battery box 200 of the embodiment of the present application, the connecting piece 220 is provided with a threaded hole 221 matched with the bolt 230, so that the connecting piece 220 can replace the nut and be connected with the bolt 230; at the same time, the connecting piece 220 can also not be designed according to the standard size of the nut, that is, the size of the connecting piece 220 can be designed to be smaller than the standard size of the nut, thereby saving the space on the side of the first box body 210 facing the fixing part 211, so as to reduce the size of the battery box 200 and the size of the battery 1100, and improve the volume energy density of the battery 1100.

[0116] In another embodiment of the present application, the connecting piece 220 is a steel piece, an aluminum alloy piece or a copper alloy piece.

[0117] In one embodiment, the connecting piece 220 is a steel piece, that is, the connecting piece 220 is made of steel, wherein the material of the connecting piece 220 can be but is not limited to carbon steel (for example: 45 steel, Q345), stainless steel (for example: SUS304, SUS316) and the like. Steel has good structural strength, so that on the basis of meeting the connection strength of the bolt 230 and the connecting piece 220, the size of the connecting piece 220 can be made smaller, further saving the space occupied by the first box body 210, reducing the size of the battery box 200, and improving the volume energy density of the battery 1100.

[0118] In one embodiment, the connecting piece 220 is an aluminum alloy piece, that is, the connecting piece 220 is made of aluminum alloy, for example: 6061 aluminum alloy, 7075 aluminum alloy, 2024 aluminum alloy and the like. Aluminum alloy has good structural strength, so that on the basis of meeting the connection strength of the bolt 230 and the connecting piece 220, the size of the connecting piece 220 can be made smaller, further saving the space occupied by the first box body 210, reducing the size of the battery box 200, and improving the volume energy density of the battery 1100.

[0119] In one embodiment, the connecting piece 220 is a copper alloy piece, that is, the connecting piece 220 is made of copper alloy, for example: brass, bronze, copper, structural copper alloy (for example: T2Y2) and the like. Copper alloy has good structural strength, so that on the basis of meeting the connection strength of the bolt 230 and the connecting piece 220, the size of the connecting piece 220 can be made smaller, further saving the space occupied by the first box body 210, reducing the size of the battery box 200, and improving the volume energy density of the battery 1100.

[0120] By adopting the technical scheme of the embodiment, on the basis of meeting the connection strength of the bolt 230 and the connecting piece 220, the size of the connecting piece 220 can be made smaller, further saving the space occupied by the first box body 210, reducing the size of the battery box 200, and improving the volume energy density of the battery 1100.

[0121] Please combineFigures 7-10 As shown in FIG. 1, Figure 7 As shown in FIG. 1, Figure 3 FIG. 1 is a structural schematic diagram of a first box body and a connecting piece shown in the specification. Figure 8 As shown in FIG. 1, Figure 7 FIG. 1 is a sectional view along the C-C line in FIG. 1. Figure 9 As shown in FIG. 1, Figure 8 FIG. 1 is an enlarged view of D in FIG. 1. Figure 10 As shown in FIG. 1, Figure 7 FIG. 1 is an exploded schematic diagram of the first box body and the connecting piece shown in the specification.

[0122] In another embodiment of the present application, the accommodation space 201 and the fixing portion 211 are respectively located on opposite sides of the first box body 210 along the first direction Z.

[0123] The first direction Z can refer to the distribution direction of the accommodation space 201 and the fixing portion 211; the accommodation space 201 is located on one side of the first box body 210 along the first direction Z, and the fixing portion 211 is located on the other side of the first box body 210 along the first direction Z.

[0124] By adopting the technical scheme of this embodiment, the size L of the connecting piece 220 in the first direction Z can be designed to be smaller, thereby saving space in the first direction Z, so that the battery 1100 can be applied to a power consumption device with more stringent requirements on the size in the first direction Z.

[0125] In some embodiments, the size of the battery 1100 along the first direction Z is smaller than the size of the battery 1100 along the second direction X, and the size of the battery 1100 along the first direction Z is greater than the size of the battery 1100 along the third direction Y. Optionally, the first direction Z, the second direction X and the third direction Y are perpendicular to each other; as an example, the first direction Z can be the height direction of the battery 1100, the second direction X can be the width direction of the battery 1100, and the third direction Y can be the length direction of the battery 1100.

[0126] The first direction Z is the height direction of the battery 1100, and space can be saved in the height direction of the battery 1100, so that the battery 1100 is adapted to a battery 1100 package or a power consumption device with stringent requirements on the size in the height direction.

[0127] In another embodiment of the present application, the axis of the first connecting hole 2111 is parallel to the second direction X, and the first direction Z is perpendicular to the second direction X.

[0128] By adopting the technical scheme of this embodiment, the bolt 230 is screwed with the threaded hole 221 after passing through the first connecting hole 2111 along the second direction X; and the second direction X is perpendicular to the first direction Z, so that the bolt 230 can be installed on the other side of the first box body 210 along the first direction Z, thereby facilitating the installation of the bolt 230.

[0129] In one embodiment, the first direction Z is the height direction of the battery 1100, the second direction X is the width direction of the battery 1100, and the bolt 230 is installed from the side of the battery 1100 along the width direction, which is simple and convenient to install.

[0130] In another embodiment of the present application, the nominal diameter of the threaded hole 221 is D, and the size of the connecting piece 220 in the first direction Z is L, wherein 1.1≤L / D≤2.

[0131] The nominal diameter D of the threaded hole 221 can refer to the maximum diameter of the thread. The nominal diameter D of the threaded hole 221 can be measured by a thread gauge. The thread gauge is a tool specially used to measure the diameter of the threaded hole 221, and there are usually several specifications to choose from. When using, the thread gauge is screwed into the threaded hole 221, ensuring that it rotates freely, and paying attention to the contact between the end of the thread gauge and the bottom of the hole. According to the size of the thread gauge, the nominal diameter D of the threaded hole 221 can be obtained.

[0132] The size L of the connecting piece 220 in the first direction Z can refer to the distance between the opposite end faces of the connecting piece 220 in the first direction Z; if the end face of the connecting piece 220 along the first direction Z is a plane, it is measured based on the plane; if the end face of the connecting piece 220 along the first direction Z forms a convex portion and / or a concave portion, it is measured based on the planar region of the end face of the connecting piece 220 along the first direction Z.

[0133] In the case where the bolt 230 passes through the first connecting hole 2111 along the second direction X and is screwed with the nut, the maximum size of the nut in the first direction Z is equal to the opposite side size of the nut; but the ratio between the opposite side size of the nut and the nominal diameter D of the threaded hole 221 of the nut is usually greater than 2, and the nut needs to occupy a larger space along the side of the first box body 210 in the first direction Z.

[0134] 1.1≤L / D≤2, it can be understood that L / D≥1.1, the connecting piece 220 has a certain structural strength along the side in the first direction Z, thereby meeting the connection requirements; L / D≤2, so that the size of the connecting piece 220 in the first direction Z is smaller than the size of the nut in the first direction Z, achieving the effect of saving space and reducing the size of the first box body 210.

[0135] By adopting the technical scheme of this embodiment, the design of 1.1≤L / D≤2 can simultaneously consider the reliability of the connecting piece 220 connection and the effect of saving space, thereby improving the use reliability of the battery 1100 and the volume energy density.

[0136] In another embodiment of the present application, 1.2≤L / D≤1.7.

[0137] L / D is greater than or equal to 1.2, the side of the connecting piece 220 along the first direction Z has better structural strength, and the connecting reliability of the connecting piece 220 is better; L / D is less than or equal to 1.7, so that the size of the connecting piece 220 in the first direction Z is much smaller than the size of the nut in the first direction Z, the space saving effect is better, and more size of the first box body 210 can be reduced.

[0138] By adopting the technical scheme of this embodiment, the design of 1.2≤L / D≤1.7 can better balance the reliability of the connecting piece 220 and the space saving effect, and better improve the use reliability of the battery 1100 and the volume energy density.

[0139] In one embodiment, the value of L / D can be, but is not limited to, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, and 2.

[0140] Please refer to the drawings shown in combination Figure 11 , Figure 11 for Figure 10 the structural schematic diagram of the connecting piece.

[0141] In another embodiment of the present application, the connecting piece 220 is a long strip structure extending along the third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0142] The connecting piece 220 extends along the third direction Y, the size of the connecting piece 220 in the third direction Y is greater than the size L of the connecting piece 220 in the first direction Z, and the size of the connecting piece 220 in the third direction Y is greater than the size of the connecting piece 220 in the second direction X. In one embodiment, the third direction Y can be the length direction of the connecting piece 220, the second direction X can be the width direction of the connecting piece 220, and the first direction Z can be the height direction of the connecting piece 220.

[0143] By adopting the technical scheme of this embodiment, the connecting piece 220 is a long strip structure, so that the connecting piece 220 has a larger size in the third direction Y, the structural reliability of the connecting piece 220 is good, and the reliability of connection with the bolt 230 is improved; in addition, multiple bolt 230 holes can be provided on the connecting piece 220 in the third direction Y to improve the reliability of connection with the second box body 240 or the mounting cooperating piece.

[0144] In another embodiment of the present application, the number of threaded holes 221 is multiple, and the multiple threaded holes 221 are arranged at intervals along the third direction Y.

[0145] The number of threaded holes 221 can be, but is not limited to, two, three, four, or five.

[0146] By adopting the technical scheme of the embodiment, the connecting piece 220 can be connected with the plurality of threaded holes 221 through the plurality of bolts 230, so that the multi-point connection of the first box body 210 and the second box body 240 or the multi-point connection of the first box body 210 and the mounting cooperating piece can be achieved, the connection reliability is improved, and the reliability of the battery 1100 is improved.

[0147] In another embodiment of the present application, the fixing part 211 is configured with a mounting cavity 2112 for the first connecting hole 2111 to communicate, and the connecting piece 220 is located in the mounting cavity 2112.

[0148] The fixing part 211 is a hollow structure, and a cavity inside the fixing part 211 forms the mounting cavity 2112, which can provide a mounting space for the connecting piece 220.

[0149] By adopting the technical scheme of the embodiment, the connecting piece 220 is located in the mounting cavity 2112 of the fixing part 211, so that the space inside the fixing part 211 can be fully utilized, which is conducive to reducing the size of the first box body 210 and improving the volumetric energy density of the battery 1100; in addition, the fixing part 211 can also play a protective role on the connecting piece 220, thereby improving the connection reliability.

[0150] In another embodiment of the present application, the connecting piece 220 is bonded to the cavity wall surface of the mounting cavity 2112.

[0151] The connecting piece 220 is bonded to the cavity wall surface of the mounting cavity 2112 by structural adhesive. The structural adhesive can be, but is not limited to, epoxy structural adhesive, polyurethane structural adhesive, acrylic structural adhesive, and silicone structural adhesive.

[0152] In one embodiment, the connecting piece 220 can be bonded to the cavity wall surface where the first connecting hole 2111 is mounted. Of course, in other embodiments, it can also be bonded to other surfaces of the mounting cavity 2112.

[0153] By adopting the technical scheme of the embodiment, the connecting piece 220 is fixed in the mounting cavity 2112 by bonding, on the one hand, the positioning of the connecting piece 220 is achieved, and the screwing operation of the bolt 230 and the threaded hole 221 is more simple and fast; on the other hand, the fixing operation is simple by adopting the bonding fixing mode, which is conducive to improving the assembly efficiency.

[0154] In another embodiment of the present application, at least one of the opposite surfaces of the connecting piece 220 in the first direction Z abuts against the cavity wall surface of the mounting cavity 2112.

[0155] A surface of the connecting piece 220 along the first direction Z is in abutment with a cavity wall surface of the mounting cavity 2112; or, another surface of the connecting piece 220 along the first direction Z is in abutment with a cavity of the mounting cavity 2112; or, opposite surfaces of the connecting piece 220 along the first direction Z are both in abutment with cavity wall surfaces of the mounting cavity 2112.

[0156] By adopting the technical solutions of this embodiment, at least one of the opposite surfaces of the connecting piece 220 along the first direction Z is in abutment with a cavity wall surface of the mounting cavity 2112, the space of the mounting cavity 2112 in the first direction Z can be saved, the size of the first box body 210 in the first direction Z can be reduced, the size of the battery 1100 in the first direction Z can be reduced, and the volumetric energy density of the battery 1100 can be improved.

[0157] In combination with Figure 12 and Figure 13 shown, Figure 12 is a structural schematic view of a connecting piece provided in another embodiment of the present application. Figure 13 is a sectional view along the line E-E in Figure 12 .

[0158] In another embodiment of the present application, the threaded hole 221 comprises a first threaded hole section 2211 and a second threaded hole section 2212 connected in communication; the connecting piece 220 comprises a body 222 and a protruding portion 223 connected in communication, the protruding portion 223 protrudes from a surface of the body 222, the body 222 is configured with the first threaded hole section 2211, and the protruding portion 223 is configured with the second threaded hole section 2212.

[0159] The threaded hole 221 is divided into two sections in the axial direction, one of which is a first threaded hole section 2211, and the other is a second threaded hole section 2212; the connecting piece 220 is also divided into two parts in the axial direction of the threaded hole 221, one of which is the body 222, and the other is the protruding part 223, which protrudes from the surface of the body 222; the first threaded hole section 2211 is located in the body 222, and the second threaded hole section 2212 is located in the protruding part 223, which surrounds the second threaded hole section 2212. The shape of the protruding part 223 can be various, such as circular, oval, quadrilateral, etc. In one embodiment, the protruding part 223 can be located on the side of the body 222 away from the first connecting hole 2111, and the protruding part 223 protrudes from the surface of the body 222 towards the first connecting hole 2111. The first threaded hole section 2211 penetrates the body 222 in the second direction X, and the second threaded hole section 2212 can penetrate the protruding part 223 in the second direction X or not. In one embodiment, the protruding part 223 can also be located on the side of the body 222 away from the first connecting hole 2111, and the protruding part 223 protrudes from the surface of the body 222 towards the first connecting hole 2111. The second threaded hole section 2212 penetrates the protruding part 223 in the second direction X, and the first threaded hole section 2211 can penetrate the body 222 in the second direction X or not.

[0160] In one embodiment, when the connecting piece 220 is provided with a plurality of threaded holes 221, the body 222 has a long strip structure, and the number of protruding parts 223 is multiple, and the protruding parts 223 are arranged one by one corresponding to the threaded holes 221.

[0161] By adopting the technical scheme of this embodiment, the arrangement of the protruding part 223 can reduce the material accumulation of the connecting piece 220, which is conducive to achieving lightweight design.

[0162] In another embodiment of the present application, the height of the protruding part 223 protruding from the body 222 is h, the nominal diameter of the threaded hole 221 is D, and 0.5≤h / D≤2.

[0163] The height h of the protruding part 223 protruding from the body 222 can refer to the distance between the surface of the protruding part 223 away from the body 222 and the surface of the body 222 towards the protruding part 223.

[0164] 0.5≤h / D≤2. It can be understood that h / D≥0.5 makes the height h of the protruding part 223 protruding from the body 222 reasonable, the protruding part 223 is not easy to be damaged, and the structural strength of the connecting piece 220 is good; h / D≤2 makes the height h of the protruding part 223 protruding from the body 222 not too large to cause the size of the battery box 200 to be too large.

[0165] By adopting the technical solutions of the embodiments, the design of 0.5≤h / D≤2 makes the connecting piece 220 simultaneously consider the reliability of connection and the size of the battery box 200.

[0166] In another embodiment of the present application, 0.7≤h / D≤1.5.

[0167] 0.7≤h / D≤1.5. It can be understood that h / D≥0.7 makes the height h of the protruding part 223 protruding from the body 222 more reasonable, the protruding part 223 is less likely to be damaged, and the structural strength of the connecting piece 220 is better; h / D≤1.5 makes the height h of the protruding part 223 protruding from the body 222 more reasonable, and the size of the battery box 200 is also more reasonable.

[0168] By adopting the technical solutions of the embodiments, the design of 0.7≤h / D≤1.5 makes the connecting piece 220 simultaneously consider the reliability of connection and the size of the battery box 200.

[0169] The value of h / D can be, but is not limited to, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.

[0170] In another embodiment of the present application, the height of the protruding part 223 protruding from the body 222 is h, and 0.5mm≤h≤50mm.

[0171] 0.5mm≤h≤50mm. It can be understood that h≥0.5mm makes the height h of the protruding part 223 protruding from the body 222 reasonable, the protruding part 223 is less likely to be damaged, and the structural strength of the connecting piece 220 is better; h≤50mm makes the height h of the protruding part 223 protruding from the body 222 not too large to cause the size of the battery box 200 to be too large.

[0172] By adopting the technical solutions of the embodiments, the design of 0.5mm≤h≤50mm makes the connecting piece 220 simultaneously consider the reliability of connection and the size of the battery box 200.

[0173] In another embodiment of the present application, 5mm≤h≤30mm.

[0174] 5mm≤h≤30mm. It can be understood that h≥5mm makes the height h of the protruding part 223 protruding from the body 222 more reasonable, the protruding part 223 is less likely to be damaged, and the structural strength of the connecting piece 220 is better; h≤30mm makes the height h of the protruding part 223 protruding from the body 222 more reasonable, and the size of the battery box 200 is also more reasonable.

[0175] By adopting the technical solutions of the embodiment, the design of 5mm≤h≤30mm enables the connecting piece 220 to better balance the reliability of the connection and the size of the battery box 200.

[0176] The value of h can be, but is not limited to, 0.5mm, 1mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, or 50mm.

[0177] In another embodiment of the present application, the first box body 210 further comprises a side frame strip 214 connected to the edge of the plate member 213, and at least part of the side frame strip 214 forms the fixing portion 211.

[0178] The side frame strip 214 can refer to a component connected to the edge of the plate member 213, and the side frame strip 214 can be made of metal materials such as aluminum alloy and copper alloy.

[0179] The part of the side frame strip 214 located on the side of the plate member 213 away from the accommodation space 201 is the fixing portion 211.

[0180] The side frame strip 214 can be partially located on the side of the plate member 213 away from the accommodation space 201. As an example, the side frame strip 214 comprises a frame body portion 2141 and a side plate portion 2142, one side of the frame body portion 2141 is connected to the edge of the plate member 213, the side plate portion 2142 is connected to the other side of the frame body portion 2141, and the side plate portion 2142 protrudes the side of the plate body toward the accommodation space 201; the frame body portion 2141 is a hollow structure, the hollow cavity of the frame body portion 2141 is an installation cavity 2112, and a first connecting hole 2111 is arranged on the side wall of the frame body portion 2141 away from the plate member 213.

[0181] The side frame strip 214 can also be entirely located on the side of the accommodation space 201.

[0182] By adopting the technical solutions of the embodiment, the side frame strip 214 has good structural strength, which is conducive to improving the connection reliability between the first box body 210 and the second box body 240 or improving the connection reliability between the first box body 210 and the mounting cooperating piece.

[0183] In another embodiment of the present application, the battery box 200 further comprises a second box body 240 connected to the fixing portion 211, and the first box body 210 and the second box body 240 surround to form the accommodation space 201.

[0184] By adopting the technical solutions of the embodiment, the battery box 200 adopts the structural form of the first box body 210 and the second box body 240, which is simple in structure and easy to process and manufacture.

[0185] In combination with Figures 14-19 the drawings,Figure 14 A structural schematic diagram of a battery provided for another embodiment of the present application. Figure 15 A sectional view along the line F-F in FIG. 1. Figure 14 A sectional view along the line F-F in FIG. 1. Figure 16 A sectional view along the line F-F in FIG. 1. Figure 15 A sectional view along the line F-F in FIG. 1. Figure 17 A sectional view along the line F-F in FIG. 1. Figure 15 A sectional view along the line F-F in FIG. 1. Figure 18 A sectional view along the line F-F in FIG. 1. Figure 17 A sectional view along the line F-F in FIG. 1. Figure 19 A sectional view along the line F-F in FIG. 1. Figure 18 A sectional view along the line F-F in FIG. 1.

[0186] In another embodiment of the present application, the first box 210 comprises a plate member 213, the receiving space 201 and the fixing portion 211 are respectively located at opposite sides of the plate member 213 along the first direction Z; an edge portion of the plate member 213 is bent to form a bent structure 2132, at least a part of the bent structure 2132 forms the fixing portion 211.

[0187] The plate member 213 can refer to a plate-shaped component in the first box 210; the receiving space 201 and the fixing portion 211 are respectively located at opposite sides of the plate member 213 along the first direction Z; in an embodiment, the receiving space 201 is located above the plate member 213, the fixing portion 211 is located at a lower side of the plate member 213, the plate member 213 supports the battery monomer 100, and the plate member 213 can be a bottom plate of the battery 1100. In an embodiment, the receiving space 201 is located below the plate member 213, the fixing portion 211 is located at an upper side of the plate member 213, the plate member 213 is located above the battery monomer 100, and the plate member 213 can be a top plate of the battery box 200.

[0188] An edge portion of the plate member 213 is bent to form a bent structure, and a part of the bent structure located at a side of the plate member 213 away from the receiving space 201 forms the fixing portion 211.

[0189] The bending structure can be partially located on the side of the plate member 213 away from the accommodation space 201. For example, the edge of the plate member 213 is bent so that the plate member 213 forms a plate body portion 2131 and a bending structure; the bending structure includes a first bending segment 21321, a second bending segment 21322, a third bending segment 21323, a fourth bending segment 21324, and a fifth bending segment 21325 connected in sequence; the first bending segment 21321 is bent from the edge of the plate body portion 2131 toward the accommodation space 201, and the first bending segment 21321 is perpendicular to the plate body portion 2131; the second bending segment 21322 is in contact with the first bending segment 21321, and the second bending segment 21322 is located on the side of the first bending segment 21321 away from the plate body portion 2131; the third bending segment 21323 is parallel to the plate body portion 2131, and the third bending segment 21323 is spaced apart from the surface of the plate body portion 2131 away from the accommodation space 201; the third bending segment 21323 is parallel and spaced apart from the fourth bending segment 21324; the fifth bending segment 21325 is in contact with the surface of the plate body portion 2131 away from the accommodation space 201; wherein the second bending segment 21322, the portion of the plate body portion 2131 on the side thereof away from the accommodation space 201, the third bending segment 21323, the fourth bending segment 21324, and the fifth bending segment 21325 form the fixing portion 211; the surface of the plate body portion 2131 away from the accommodation space 201, the portion of the second bending segment 21322 on the side thereof away from the accommodation space 201, the third bending segment 21323, and the fourth bending segment 21324 jointly form the mounting cavity 2112; and the first connecting hole 2111 is arranged on the portion of the second bending segment 21322 on the side thereof away from the accommodation space 201.

[0190] The bending structure can also be entirely located on the side of the plate member 213 away from the accommodation space 201; for example, the edge of the plate member 213 is bent directly away from the accommodation space 201 to form the fixing portion 211; of course, the plate member 213 can have other bending modes on the side thereof away from the accommodation space 201, which are not limited herein.

[0191] By adopting the technical scheme of the embodiment, the plate member 213 is bent to form the fixing portion 211, which can reduce the number of components, save space, and improve the volumetric energy density of the battery 1100; at the same time, the bending radius of the bending mode can be small, which is also conducive to saving space and further improving the volumetric energy density of the battery 1100; on the other hand, the bending process is simple, which is conducive to improving the production efficiency of the battery 1100.

[0192] In another embodiment of the present application, the second box body 240 is provided with a second connecting hole 241 for the bolt 230 to pass through.

[0193] The second connecting hole 241 can refer to a hole structure of the second box 240 for the bolt 230 to pass through. After the bolt 230 passes through the second connecting hole 241 and the first connecting hole 2111, the bolt 230 is screwed with the bolt hole of the connecting piece 220, thereby realizing the connection of the first box 210 and the second box 240.

[0194] By adopting the technical scheme of the embodiment, the second box 240 can directly use the threaded hole 221 of the bolt 230 and the connecting piece 220 to realize the connection of the first box 210 and the second box 240, so that other connecting structures are not needed, which is beneficial to reduce the number of parts, save space, and improve the volume energy density of the battery 1100.

[0195] In another embodiment of the present application, the fixing part 211 is connected with the connecting part 212, the connecting part 212 protrudes from the surface of the plate part 213 facing the accommodation space 201, the connecting part 212 is located in the second box 240, and a sealing piece 250 is arranged between the connecting part 212 and the inner wall of the second box 240.

[0196] The connecting part 212 can refer to the part of the first box 210 protruding from the plate part 213 towards the accommodation space 201, that is, the connecting part 212 is inserted into the second box 240. In one embodiment, in combination with the above description, the connecting part 212 can refer to the part of the first bending section 21321 and the second bending section 21322 described above, which is located on the side of the plate body part 2131 facing the accommodation space 201. Figure 16 As shown in the figure, the connecting part 212 can refer to the side plate part 2142 described above. Figure 6 As shown in the figure, the connecting part 212 can refer to the side plate part 2142 described above.

[0197] The sealing piece 250 is a mechanical part for preventing gas or liquid leakage. The sealing piece 250 can have various types, such as an O-ring, a gasket, a sealant, a sealing strip, etc.

[0198] By adopting the technical scheme of the embodiment, the sealing piece 250 is filled between the connecting part 212 and the second box 240, which can increase the sealing performance between the first box 210 and the second box 240, improve the use reliability of the battery 1100, and facilitate the setting of the sealing piece 250 by increasing the connection area of the first box 210 and the second box 240, thereby achieving better sealing effect.

[0199] In another embodiment of the present application, the plate part 213 is provided with the fixing part 211 on the opposite two side parts in the second direction X, and the first direction Z intersects with the second direction X.

[0200] For example, the second direction X can be a width direction of the plate member 213, and the opposite two edge portions of the plate member 213 are provided with two first bending portions by bending.

[0201] By adopting the technical scheme of the embodiment, the opposite two edge portions of the plate member 213 are provided with the fixing portion 211, the connection point of the first box body 210 and the second box body 240 can be increased, and the reliability of the connection of the first box body 210 and the second box body 240 can be improved; or the mounting point of the battery box 200 can be increased, and the reliability of the mounting of the battery 1100 can be improved.

[0202] In another embodiment of the present application, the first box body 210 further comprises a first sealing plate 215 and a second sealing plate 216, one of the opposite two edge portions of the plate member 213 along the third direction Y is connected with the first sealing plate 215, and the other of the opposite two edge portions of the plate member 213 along the third direction Y is connected with the second sealing plate 216; the first sealing plate 215, the second sealing plate 216 and the plate member 213 jointly form the accommodation space 201, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0203] The first sealing plate 215 and the second sealing plate 216 are located at the opposite two edge portions of the plate member 213 along the third direction Y, the first sealing plate 215, the second sealing plate 216 and the plate member 213 form a U-shaped structure, and the second box body 240 is arranged on the opening side of the U-shaped structure to form the accommodation space 201, the second box body 240 also has a U-shaped structure to match the structure of the first box body 210, the opposite two side walls of the second box body 240 are connected with the two fixing portions 211 through the bolts 230, and the first sealing plate 215 and the second sealing plate 216 are arranged on the opposite two openings of the second box body 240 along the third direction Y, and the first box body 210 and the second box body 240 jointly form the accommodation space 201.

[0204] By adopting the technical scheme of the embodiment, the structure of the first box body 210 is simple, and the processing and manufacturing are convenient.

[0205] In one embodiment, the plate member 213 is bent to form a first bending portion 2133 and a second bending portion 2134 on opposite sides of the plate member 213 along the third direction Y, the first bending portion 2133 and the second bending portion 2134 are located on the side of the plate member 213 facing the accommodation space 201, the first sealing plate 215 is welded with the first bending portion 2133, and the second sealing plate 216 and the fourth sealing plate are welded, so as to realize the sealing connection of the first sealing plate 215, the second sealing plate 216 and the plate member 213; in addition, in the welding process, the first sealing plate 215 can be inserted into the gap between the first bending portion 2133 and the fixed portion 211 for pre-positioning, so as to facilitate the subsequent welding connection; similarly, the second sealing plate 216 can be inserted into the gap between the second bending portion 2134 and the fixed portion 211 for pre-positioning, so as to facilitate the subsequent welding connection.

[0206] In one embodiment, the first bending portion 2133 is located on the side of the plate member 213 away from the accommodation space 201, and the second bending portion 2134 is located on the side of the plate member 213 facing the accommodation space 201, the first sealing plate 215 is welded with the first bending portion 2133, and the second sealing plate 216 and the fourth sealing plate are welded, so as to realize the sealing connection of the first sealing plate 215, the second sealing plate 216 and the plate member 213; in the welding process, the first sealing plate 215 is positioned on the wall surface of the first bending portion 2133, so as to facilitate the subsequent welding connection; similarly, the second sealing plate 216 can be inserted into the gap between the second bending portion 2134 and the fixed portion 211 for pre-positioning, so as to facilitate the subsequent welding connection.

[0207] In another embodiment of the present application, the first box body 210 further comprises a plurality of mounting beams 217 connected with the plate member 213, the plurality of mounting beams 217 are located between the two fixed portions 211, and the plurality of mounting beams 217 are arranged at intervals along the third direction Y.

[0208] The mounting beam 217 can refer to a beam connected with the plate member 213 and arranged at intervals along the third direction Y, and the mounting beam 217 can be used to be fixed on a mounting matching member to realize the mounting of the battery 1100. The number of the mounting beam 217 can be, but is not limited to, two, three, four or five; for example, the mounting beam 217 extends along the first direction Z, and three mounting beams 217 are arranged at intervals along the second direction X; the plurality of mounting beams 217 can be arranged at equal intervals or at unequal intervals, which can be set according to actual needs; of course, in other embodiments, the mounting beam 217 can also extend along other directions.

[0209] By adopting the technical scheme of the embodiment, the plurality of mounting beams 217 can strengthen the structural strength of the plate member 213, improve the structural strength of the first box body 210, and be beneficial to improving the use reliability of the battery 1100 and the electric device.

[0210] In another embodiment of the present application, the plurality of mounting beams 217 are located at the side of the plate member 213 away from the accommodation space 201.

[0211] It can be understood that the mounting beams 217 are located outside the accommodation space 201.

[0212] By adopting the technical solutions of the embodiment, the mounting beams 217 are located outside the accommodation space 201, the mounting beams 217 do not occupy the space of the accommodation space 201, so that the accommodation space 201 can accommodate more battery monomers 100, which is beneficial to improve the volumetric energy density of the battery 1100.

[0213] In another embodiment of the present application, the first box body 210 further comprises a first module beam 218 and a second module beam 219 for connecting with the battery monomer 100, the first module beam 218 and the second module beam 219 are located in the accommodation space 201, the first module beam 218 is connected with one of the two edges of the plate member 213 distributed opposite to each other along the third direction Y, and the second module beam 219 is connected with the other of the two edges of the plate member 213 distributed opposite to each other along the third direction Y.

[0214] The two edges of the plate member 213 distributed opposite to each other along the third direction Y are each provided with a module beam, one of the module beams is the first module beam 218, and the other of the module beams is the second module beam 219; the module beams are located in the accommodation space 201, the module beams are connected with the plate member 213 to realize the fixation of the module beams in the accommodation space 201, and the module beams are connected with the battery monomers 100, so that the module beams support and fix the battery monomers 100, which is beneficial to improve the structural strength of the battery box 200 and improve the use reliability of the battery 1100.

[0215] In another embodiment of the present application, along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, and / or the last mounting beam 217 is arranged opposite to the second module beam 219.

[0216] The plurality of mounting beams 217 are arranged in sequence along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, the first mounting beam 217 and the first module beam 218 are located on opposite sides of the plate member 213 along the first direction Z, and one side of the plate member 213 along the third direction Y is clamped between the first mounting beam 217 and the first module beam 218, so as to increase the structural strength of the first box body 210 at the first module beam 218 and facilitate the improvement of the structural strength of the first box body 210.

[0217] In a possible implementation, along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, so as to increase the structural strength of the first box body 210 at the first module beam 218 and facilitate the improvement of the structural strength of the first box body 210.

[0218] In a possible implementation, along the third direction Y, the last mounting beam 217 is arranged opposite to the second module beam 219, so as to increase the structural strength of the first box body 210 at the second module beam 219 and facilitate the improvement of the structural strength of the first box body 210.

[0219] In a possible implementation, along the third direction Y, the first mounting beam 217 is arranged opposite to the first module beam 218, and the last mounting beam 217 is arranged opposite to the second module beam 219, so as to increase the structural strength of the first box body 210 on opposite sides along the third direction Y and effectively improve the structural strength of the first box body 210.

[0220] By adopting the technical scheme of the embodiment, the structural strength of the first box body 210 can be improved, and the use reliability of the battery 1100 is facilitated.

[0221] In another embodiment of the present application, the plate member 213 is a heat exchange member for heat exchange with the battery monomer 100.

[0222] The heat exchange member can refer to the plate member 213 for heat exchange with the battery monomer 100; the heat exchange member is provided with a heat exchange channel, and a heat exchange medium flows through the heat exchange channel while exchanging heat with the battery monomer 100, so as to achieve temperature control of the battery monomer 100 and improve the performance of the battery 1100. For example, the heat exchange member is a cold plate.

[0223] By adopting the technical scheme of the embodiment, the plate member 213 is directly a heat exchange member, so that the plate member 213 does not need to be separately arranged, the number of parts can be reduced, space can be saved, and the volume energy density of the battery 1100 can be improved.

[0224] In another embodiment of the present application, the fixing portion 211 is used to be connected with a mounting cooperation member through the bolt 230 to realize the mounting of the battery box 200.

[0225] The mounting cooperation member can refer to a component for realizing the mounting of the battery 1100, and the mounting cooperation member is provided with a third connecting hole. The bolt 230 passes through the third connecting hole and the first connecting hole and is then screwed with the threaded hole 221, so as to realize the fixed connection of the battery box 200 and the mounting cooperation member and realize the mounting of the battery 1100. For example, the mounting cooperation member can be a chassis component of the vehicle 1000, such as a cross beam or a longitudinal beam.

[0226] By adopting the technical scheme of the embodiment, the fixing portion 211 can be used as a mounting structure of the battery 1100, and the mounting of the battery 1100 is realized through the bolt 230, so that the mounting operation is simple and the mounting efficiency can be improved.

[0227] The battery box 200 of the embodiments of the present application will be described below in combination with some embodiments.

[0228] Embodiment one

[0229] In combination with Figures 2-11 As shown in the figure, in the embodiment, the battery box 200 includes a first box body 210, a second box body 240, a bolt 230 and a connecting member 220. The first box body 210 includes a plate member 213, a side frame strip 214, a first side plate and a second side plate.

[0230] Along the first direction Z, opposite sides of the plate member 213 are respectively provided with a receiving space 201 and a fixing portion 211, and the fixing portion 211 is provided with a first connecting hole 2111. The connecting member 220 is provided with a threaded hole 221 for screwing with the bolt 230, and the first connecting hole 2111 is oppositely arranged with the threaded hole 221, so that the bolt 230 passes through the first connecting hole 2111 and is screwed with the threaded hole 221.

[0231] The axis of the first connecting hole 2111 is parallel to the second direction X, and the first direction Z is perpendicular to the second direction X. The connecting member 220 is a long strip structure extending along the third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other. The number of the threaded holes 221 is multiple, and the multiple threaded holes 221 are arranged at intervals along the third direction Y.

[0232] The fixing portion 211 is configured with a mounting cavity 2112 for the communication of the first connecting hole 2111, and the connecting member 220 is located in the mounting cavity 2112.

[0233] The connector 220 is bonded to the cavity wall of the mounting cavity 2112, which has a first connection hole 2111.

[0234] The two opposing surfaces of the connector 220 along the first direction Z abut against the cavity wall surfaces of the mounting cavity 2112, which are respectively disposed opposite to each other along the first direction Z.

[0235] The plate 213 is connected to the opposite sides of the second direction X by side frame strips 214 respectively; the side frame strips 214 include a frame part 2141 and a side plate part 2142. One side of the frame part 2141 is connected to the edge of the plate 213, and the side plate part 2142 is connected to the other side of the frame part 2141. The side plate part 2142 protrudes from the side of the plate facing the receiving space 201; the frame part 2141 is a hollow structure, and the hollow cavity of the frame part 2141 is a mounting cavity 2112. The side wall of the frame part 2141 facing away from the plate 213 is provided with a first connecting hole 2111.

[0236] The second housing 240 has second connecting holes 241 on opposite sides along the second direction X. After the bolt 230 passes through the second connecting hole 241 and the first connecting hole 2111, it is screwed into the threaded hole 221. The first housing 210, the plate 213 and the side frame strip 214 form a receiving space 201. The side plate 2142 is located inside the second housing 240, and a sealing element 250 is provided between the side plate 2142 and the inner wall of the second housing 240.

[0237] The first sealing plate 215 and the second sealing plate 216 are respectively fixed to opposite sides of the plate 213 along the third direction Y. The first bent portion 2133 is located on the side of the plate 213 facing away from the receiving space 201, and the second bent portion 2134 is located on the side of the plate 213 facing the receiving space 201. The first sealing plate 215 is welded to the first bent portion 2133, and the second sealing plate 216 is welded to the fourth sealing plate, thereby achieving a sealed connection between the first sealing plate 215, the second sealing plate 216 and the plate 213. The first sealing plate 215, the second sealing plate 216, the two side frame strips 214, and the plate 213 together form a U-shaped structure. The second box 240 is placed on the opening side of the U-shaped structure, thereby enclosing and forming a receiving space 201. The second box 240 is also U-shaped to match the structure of the first box 210. The opposite side walls of the second box 240 are respectively connected to the two side frame strips 214 by bolts 230. The first sealing plate 215 and the second sealing plate 216 are placed on the opposite two openings of the second box 240 along the third direction Y. The first box 210 and the second box 240 together enclose and form the receiving space 201.

[0238] The first box body 210 further comprises a plurality of mounting beams 217 connected with the plate member 213, the plurality of mounting beams 217 are located between the two fixing portions 211, and the plurality of mounting beams 217 are spaced apart along the third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0239] The first box body 210 further comprises a first module beam 218 and a second module beam 219 for connecting with the battery monomer 100, the first module beam 218 and the second module beam 219 are located in the accommodation space 201, the first module beam 218 is connected with one of the two edge portions of the plate member 213 which are oppositely distributed along the third direction Y, and the second module beam 219 is connected with the other of the two edge portions of the plate member 213 which are oppositely distributed along the third direction Y.

[0240] Along the third direction Y, the first mounting beam 217 is oppositely arranged with the first module beam 218, and the last mounting beam 217 is oppositely arranged with the second module beam 219.

[0241] Embodiment two

[0242] In combination Figures 14-19 As shown, the difference between this embodiment and embodiment one is that the edge portion of the plate member 213 is bent so that the plate member 213 forms a plate body portion 2131 and a bent structure; the bent structure comprises a first bent segment 21321, a second bent segment 21322, a third bent segment 21323, a fourth bent segment 21324 and a fifth bent segment 21325 which are connected in sequence; the first bent segment 21321 is bent from the edge portion of the plate body portion 2131 towards the accommodation space 201, and the first bent segment 21321 is perpendicular to the plate body portion 2131; the second bent segment 21322 is in contact with the first bent segment 21321, and the second bent segment 21322 is located at the side portion of the first bent segment 21321 which is away from the plate body portion 2131; the third bent segment 21323 is parallel to the plate body portion 2131, the third bent segment 21323 is spaced apart from the surface of the plate body portion 2131 which is away from the accommodation space 201, and the third bent segment 21323 is parallel and spaced apart from the fourth bent segment 21324; the fifth bent segment 21325 is in contact with the surface of the plate body portion 2131 which is away from the accommodation space 201; wherein the portion of the plate body portion 2131 which is located at the side of the plate body portion 2131 which is away from the accommodation space 201, the third bent segment 21323, the fourth bent segment 21324 and the fifth bent segment 21325 form the fixing portion 211, the surface of the plate body portion 2131 which is away from the accommodation space 201, the portion of the second bent segment 21322 which is located at the side of the plate body portion 2131 which is away from the accommodation space 201, the third bent segment 21323 and the fourth bent segment 21324 jointly form the mounting cavity 2112, and the first connecting hole 2111 is arranged at the portion of the second bent segment 21322 which is located at the side of the plate body portion 2131 which is away from the accommodation space 201.

[0243] Example 3

[0244] Combination Figure 12 and Figure 13 As shown, this embodiment differs from Embodiments 1 and 2 in that: the threaded hole 221 includes a first threaded hole segment 2211 and a second threaded hole segment 2212 distributed and connected along the second direction X; the connector 220 includes a body 222 and a protrusion 223 distributed and connected along the second direction X, the protrusion 223 protruding from the surface of the body 222, the body 222 having the first threaded hole segment 2211, and the protrusion 223 having the second threaded hole segment 2212.

[0245] According to one embodiment of this application, in conjunction with Figure 2 and Figure 3 As shown in the figure, this application embodiment also provides a battery 1100, including the battery box 200 as described in the above embodiment.

[0246] According to one embodiment of this application, in conjunction with Figure 1 As shown in the figure, this application embodiment also provides an electrical device, including a battery 1100 as described in the above embodiment.

[0247] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0248] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery box characterized by, The battery box comprises: a first box body provided with a receiving space for accommodating battery monomers, a fixing portion provided on a side of the first box body opposite to the receiving space, and a first connecting hole provided on the fixing portion; a connecting piece provided with a threaded hole for being screwed with a bolt, the first connecting hole and the threaded hole being oppositely arranged so that the bolt passes through the first connecting hole and is screwed with the threaded hole, the receiving space and the fixing portion being respectively located on opposite sides of the first box body along a first direction, and the first direction being a height direction of the battery box.

2. The battery pack of claim 1, wherein: The connecting piece is made of steel, aluminum alloy or copper alloy.

3. The battery pack of claim 1, wherein: An axis of the first connecting hole is parallel to a second direction, and the first direction is perpendicular to the second direction.

4. The battery pack of claim 3, wherein: A nominal diameter of the threaded hole is D, and a size of the connecting piece along the first direction is L, wherein 1.1≤L / D≤2.

5. The battery pack of claim 4, wherein: 1.2≤L / D≤1.

7.

6. The battery pack of claim 3, wherein: The connecting piece is in a strip structure extending along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

7. The battery box of claim 6, wherein: The threaded hole is provided in a plurality of numbers and is arranged in intervals along the third direction.

8. The battery pack of claim 1, wherein: The fixing portion is configured with a mounting cavity for the first connecting hole, and the connecting piece is located in the mounting cavity.

9. The battery pack of claim 8, wherein: The connecting piece is bonded to a cavity wall surface of the mounting cavity.

10. The battery pack of claim 8, wherein: At least one of opposite surfaces of the connecting piece along the first direction abuts against the cavity wall surface of the mounting cavity.

11. The battery pack of any one of claims 1-10, wherein: The threaded hole comprises a first threaded hole segment and a second threaded hole segment which are connected in communication. The connecting piece comprises a body and a protruding portion which is protruded from a surface of the body, the body is configured with the first threaded hole segment, and the protruding portion is configured with the second threaded hole segment.

12. The battery pack of claim 11, wherein: A height of the protruding portion protruded from the body is h, a nominal diameter of the threaded hole is D, and 0.5≤h / D≤2.

13. The battery pack of claim 12, wherein: 0.7≤h / D≤1.

5.

14. The battery pack of claim 11, wherein: The height of the protruding portion protruded from the body is h, and 0.5mm≤h≤50mm.

15. The battery pack of claim 14, wherein: 5mm≤h≤30mm.

16. The battery box according to any one of claims 1 to 10, characterized by: The first box body comprises a plate piece, and the receiving space and the fixing portion are respectively located on opposite sides of the plate piece along a first direction. An edge portion of the plate piece is bent and forms a bent structure, and at least part of the bent structure forms the fixing portion; or the first box body further comprises a side frame strip connected with the edge portion of the plate piece, and at least part of the side frame strip forms the fixing portion.

17. The battery pack of claim 16, wherein: The battery box further comprises a second box body connected with the fixing portion, and the first box body and the second box body surround to form the receiving space.

18. The battery pack of claim 17, wherein: The second box body is provided with a second connecting hole for the bolt to pass through.

19. The battery pack of claim 17, wherein: The fixing portion is connected with a connecting portion protruded from a surface of the plate piece facing the receiving space, the connecting portion is located in the second box body, and a sealing piece is arranged between the connecting portion and an inner wall of the second box body.

20. The battery pack of claim 16, wherein: Opposite edge portions of the plate piece along a second direction are provided with the fixing portion, and the first direction intersects with the second direction.

21. The battery pack of claim 20, wherein: The first box further comprises a first sealing plate and a second sealing plate, one side of the two sides of the plate member distributed along the third direction is connected with the first sealing plate, and the other side of the two sides of the plate member distributed along the third direction is connected with the second sealing plate; the first sealing plate, the second sealing plate and the plate member jointly form the accommodation space, and the first direction, the second direction and the third direction are perpendicular to each other.

22. The battery pack of claim 20, wherein: The first box further comprises a plurality of mounting beams connected with the plate member, the plurality of mounting beams are located between the two fixing parts, and the plurality of mounting beams are arranged along the third direction; the first direction, the second direction and the third direction are perpendicular to each other.

23. The battery pack of claim 22, wherein: The plurality of mounting beams are located on the side of the plate member away from the accommodation space.

24. The battery pack of claim 22, wherein: The first box further comprises a first module beam and a second module beam for connecting with the battery monomer, the first module beam and the second module beam are located in the accommodation space, the first module beam is connected with one side of the two sides of the plate member distributed along the third direction, and the second module beam is connected with the other side of the two sides of the plate member distributed along the third direction.

25. The battery pack of claim 24, wherein: Along the third direction, the first mounting beam is arranged opposite to the first module beam, and / or the last mounting beam is arranged opposite to the second module beam.

26. The battery pack of claim 16, wherein: The plate member is a heat exchange member for exchanging heat with the battery monomer.

27. The battery box of any one of claims 1-10, wherein: The fixing part is used for being connected with the mounting cooperation member through the bolt, so as to realize the mounting of the battery box.

28. A battery, characterized by: The battery box comprises any one of claims 1-27.

29. An electrical device, comprising: The battery comprises claim 28.

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