Battery devices and power-consuming devices

Abstract

The present application discloses a battery device and an electrical device, wherein the battery device includes a box body and an expansion beam, a receiving cavity is formed in the box body, and the box body has two first side beams arranged at a relative interval; the expansion beam is arranged in the receiving cavity, and the two ends of the expansion beam are detachably connected to the two first side beams, and the expansion beam can move along a first direction relative to the first side beam. In the above scheme provided by the present application, when the battery cell has a tendency to expand, the expansion beam abuts the battery cell, and uses the deformation of the receiving cavity to absorb and transmit the expansion force, thereby reducing the probability of the box body being deformed by the expansion force. The overall device can remove the expansion beam before the battery cell is installed, and then install the expansion beam after the battery cell is installed and move it along the first direction close to the battery cell, which facilitates the assembly of the overall battery and helps to improve the installation efficiency.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] The battery generally includes a lower box body and a battery cell accommodated in the lower box body. In order to accommodate the expansion of the end of the battery cell, an expansion beam is generally provided between the battery cell and the lower box body to withstand the expansion force.

[0003] The expansion beam in the related art is not convenient to be installed on the lower box body when in use. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can solve the problem that the expansion beam is inconvenient to install on the lower box.

[0005] In order to solve the above technical problems, in a first aspect, the present application proposes a battery device, comprising:

[0006] A box body, wherein a receiving cavity is formed in the box body, and the box body has two first side beams arranged relatively and spaced apart;

[0007] An expansion beam is arranged in the accommodating cavity, two ends of the expansion beam are detachably connected to the two first side beams, and the expansion beam can move relative to the first side beams along a first direction, wherein the first direction is the stacking arrangement direction of the battery cells.

[0008] In the technical solution of the embodiment of the present application, before the battery cell is installed, the expansion beam can be removed from between the two first side beams. After the battery cell is installed, the expansion beam is installed on the two first side beams, and the expansion beam is moved along the first direction so that the expansion beam abuts against the battery cell. In this way, when the battery cell has a tendency to expand, the expansion beam abuts against the battery cell, and uses the deformation of the accommodating cavity to absorb and transmit the expansion force, thereby reducing the probability of the box body being deformed due to the expansion force. The overall device can remove the expansion beam before the battery cell is installed, and then install the expansion beam after the battery cell is installed and move it along the first direction close to the battery cell, which facilitates the assembly of the overall battery and helps to improve installation efficiency.

[0009] In some embodiments, openings are provided on opposite sides of the two first side beams, two ends of the expansion beam are correspondingly located in the two openings, and the expansion beam can move relative to the openings along the first direction.

[0010] In some embodiments, the first side beam has a first wall and a second wall spaced apart along a second direction, the first wall faces the accommodation cavity, and the second wall is away from the accommodation cavity;

[0011] There is a hollow structure between the first wall and the second wall, and the opening is arranged in the first wall;

[0012] The distance between the two second walls on the two first side beams along the second direction is greater than the length of the expansion beam, and the distance between the two first walls on the two first side beams along the second direction is less than the length of the expansion beam, wherein the second direction is the direction from the first wall to the second wall.

[0013] In some embodiments, the length of the expansion beam is L1, the distance between the two first walls is L2, and the size of the inner cavity of one of the first side beams along the second direction is L3, wherein L1≤L2+L3.

[0014] In some embodiments, a first sawtooth is provided on the inner wall of the opening facing the bottom surface of the box body, and a second sawtooth is provided on the side of the expansion beam facing the bottom surface of the box body, and the first sawtooth cooperates with the second sawtooth.

[0015] In some embodiments, both the first sawtooth and the second sawtooth extend along the first direction, and the second sawtooth can move along the first direction relative to the first sawtooth.

[0016] In some embodiments, the teeth on the first sawtooth and the second sawtooth are all bevel teeth, and the second sawtooth can move unidirectionally along the first direction relative to the first sawtooth.

[0017] In some embodiments, when the second saw tooth moves to a preset position relative to the first saw tooth, one end of the expansion beam facing the first side beam is welded to the first side beam.

[0018] In some embodiments, the battery device further includes a baffle disposed on a side of the second wall facing the first wall.

[0019] In some embodiments, the length of the expansion beam is L1, the distance between the two first walls is L2, and the dimension of the baffle and the first wall on one of the first side beams along the second direction is L4, wherein L1≤L2+L4.

[0020] In some embodiments, a hollow portion is disposed inside the expansion beam.

[0021] In some embodiments, the battery device further includes a support beam, wherein the support beam is disposed between the two first side beams, and the expansion beams are disposed on both sides of the support beam along the first direction.

[0022] In some embodiments, the first direction is a large-surface stacking direction of the battery cells.

[0023] In a second aspect, the present application proposes an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0027] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0028] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0029] Figure 4 A schematic diagram of the structure of the box body provided in some embodiments of the present application;

[0030] Figure 5 for Figure 4 Exploded diagram of

[0031] Figure 6 Another schematic diagram of a box body provided in some embodiments of the present application;

[0032] Figure 7 for Figure 6 The enlarged schematic diagram of point A in the middle;

[0033] Figure 8 Schematic diagram of an expansion beam provided for some embodiments of the present application.

[0034] The reference numerals in the specific implementation manner are as follows:

[0035] 1000. Vehicles;

[0036] 100, battery; 200, controller; 300, motor;

[0037] 110, box body; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 123, electrode assembly;

[0038] 10. Box body; 11. First side beam; 113. First wall; 1131. Opening; 114. Second wall; 115. First serration; 116. Baffle; 12. Second side beam; 13. Expansion beam; 131. Second serration; 132. Hollow portion; 14. Support beam. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] 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. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0048] In the related art, the battery generally includes a box body and a battery cell accommodated in the box body. In order to accommodate the expansion of the end of the battery cell, an expansion beam is generally provided between the battery cell and the box body to withstand the expansion force.

[0049] After the expansion beam is set inside the box, it is used to abut against the battery cell to resist the expansion force of the battery cell. The expansion beam can be installed on two opposite side walls of the box. When assembling the battery, the expansion beam is generally assembled first, that is, the expansion beam is first connected to the corresponding side wall, and then the side wall connected to the expansion beam is connected to the other side walls of the box. This makes it inconvenient to adjust the position of the expansion beam relative to the battery cell, which easily makes it difficult to assemble the expansion beam to a suitable position, thereby bringing inconvenience to the installation of the expansion beam.

[0050] Based on the above considerations, in order to solve the problem of inconvenient installation of the expansion beam, a battery device is designed, which includes a box body and an expansion beam, wherein a accommodating cavity is formed in the box body, and the box body has two first side beams arranged relatively at intervals; the expansion beam is arranged in the accommodating cavity, and the two ends of the expansion beam are detachably connected to the two first side beams respectively, and the expansion beam can move along a first direction relative to the first side beam, wherein the first direction is the stacking arrangement direction of the battery cells.

[0051] In the technical solution of the embodiment of the present application, before the battery cell is installed, the expansion beam can be removed from between the two first side beams. After the battery cell is installed, the expansion beam is installed on the two first side beams, and the expansion beam is moved along the first direction so that the expansion beam abuts against the battery cell. In this way, when the battery cell has a tendency to expand, the expansion beam abuts against the battery cell, and uses the deformation of the accommodating cavity to absorb and transmit the expansion force, thereby reducing the probability of the box body being deformed due to the expansion force. The overall device can remove the expansion beam before the battery cell is installed, and then install the expansion beam after the battery cell is installed and move it along the first direction close to the battery cell, which facilitates the assembly of the overall battery and helps to improve installation efficiency.

[0052] The battery in this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. The battery can be used as a power source or power system for an electrical device, which is conducive to improving the overall performance of the battery and facilitating the promotion of the battery.

[0053] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0055] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0056] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0057] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box body 110 and a battery cell 120, and the battery cell 120 is contained in the box body 110. Among them, the box body 110 is used to provide a storage space for the battery cell 120, and the box body 110 can adopt a variety of structures. In some embodiments, the box body 110 may include a first part 111 and a second part 112, and the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0058] In the battery 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0059] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0060] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123 and an electrode terminal. The housing includes a shell 121 and an end cap 122. The shell 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0061] The shell 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte and other components. The shell 121 and the end cap 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0062] The end cap 122 refers to a component that covers the opening of the shell 121 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 121 to match the shell 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap 122. The electrode terminal can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell 120. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 122, and the insulating structure may be used to isolate the electrical connection components in the housing 121 from the end cap 122 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0063] The electrode assembly 123 is a component in the battery cell 120 where an electrochemical reaction occurs. One or more electrode assemblies 123 may be included in the housing 121. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 123, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal to form a current loop. In addition, the electrode assembly 123 may be a winding structure or a laminated structure.

[0064] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0065] According to some embodiments of the present application, Figure 4 This is a schematic diagram of the structure of the box body in this application. Figure 5 for Figure 4 Exploded diagram of Figure 4 and Figure 5As shown, the present application provides a battery device, which includes a box body 10 and an expansion beam 13, wherein a accommodating cavity is formed in the box body 10, and the box body 10 has two first side beams 11 arranged relatively at intervals; the expansion beam 13 is arranged in the accommodating cavity, and the two ends of the expansion beam 13 are detachably connected to the two first side beams 11, and the expansion beam 13 can move relative to the first side beam 11 along a first direction, wherein the first direction is the stacking arrangement direction of the battery cells.

[0066] The first direction in this embodiment is as follows Figure 4 The X-axis direction.

[0067] The box body 10 in this embodiment is also the main part of the battery box, which forms a receiving cavity for receiving the battery cells. The box body 10 may include a frame, which is surrounded by the receiving cavity. The box body 10 may also include a bottom plate, which is arranged at the bottom end of the frame to serve as the bottom wall of the box body 10 and seal the bottom end of the receiving cavity.

[0068] The two first side beams 11 can be understood as two side beams arranged opposite to each other in the frame. The frame can be a substantially rectangular frame, and the two first side beams 11 can be arranged opposite to each other and in parallel. In addition to the two first side beams 11, the frame can also include two second side beams 12 arranged opposite to each other and at intervals, as shown in FIG. Figure 4 As shown, two first side beams 11 and two second side beams 12 are arranged to form a frame.

[0069] In this embodiment, the expansion beam 13 is disposed in the accommodating cavity, and it may be a strip-shaped block or plate-shaped structure, and the specific structure may be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0070] The structural design and installation of the expansion beam 13 complement each other. The expansion beam 13 can be processed by a variety of processes, and can specifically be a profile expansion beam 13, a rolled expansion beam 13, a sheet metal expansion beam 13, a die-cast expansion beam 13, etc.

[0071] The two ends of the expansion beam 13 may be two ends of the expansion beam 13 that are arranged opposite to each other along its own length direction. For the convenience of description, the end of the expansion beam 13 connected to one of the first side beams 11 is defined as the first end, and the end of the expansion beam 13 connected to the other first side beam 11 is defined as the second end. In this embodiment, the length direction of the expansion beam 13 can be understood with reference to the width direction of the battery box.

[0072] During assembly, since the two ends of the expansion beam 13 are detachably connected to the two first side beams 11, the expansion beam 13 can be removed from the two first side beams 11 before the battery cell is installed. After the battery cell is installed, the expansion beam 13 is installed on the two first side beams 11, and the expansion beam 13 is moved along the first direction so that the expansion beam 13 abuts against the battery cell. At this time, when the battery cell has a tendency to expand, the expansion beam 13 abuts against the battery cell, and uses the deformation of the accommodating cavity to absorb and transmit the expansion force, thereby reducing the probability of the box body 10 being deformed by the expansion force. The overall device can remove the expansion beam 13 before the battery cell is installed, and then install the expansion beam 13 after the battery cell is installed and move it along the X-axis direction to be close to the battery cell. This facilitates the assembly of the overall battery and helps to improve installation efficiency.

[0073] According to some embodiments of the present application, Figure 5 As shown, openings 1131 are provided on opposite sides of the two first side beams 11 , two ends of the expansion beam 13 are correspondingly located in the two openings 1131 , and the expansion beam 13 can move relative to the openings 1131 along a first direction.

[0074] In this embodiment, the opening 1131 can have the same cross-sectional shape as the expansion beam 13. For example, the opening 1131 is a square opening, and the cross-sectional shape of the expansion beam 13 is a square. The specific shape can be determined based on actual conditions, and this specification does not limit this.

[0075] In this embodiment, the size of the opening 1131 along the X-axis is greater than the size of the expansion beam 13 along the X-axis.

[0076] In this embodiment, the distance between the two opposite sides of the two first side beams 11 is greater than the entire length of the expansion beam 13 .

[0077] During installation, one end of the expansion beam 13 can be inserted into one of the openings 1131 first. At this time, the other end of the expansion beam 13 is separated from the other opening 1131, and then the other end of the expansion beam 13 is extended into the other opening 1131. Finally, the expansion beam 13 is adjusted to move relative to the opening 1131 in the X-axis direction so that the expansion beam 13 abuts against the battery cell.

[0078] Since the opening 1131 is provided on the first side beam 11 , it is convenient to install the expansion beam 13 on the first side beam 11 .

[0079] According to some embodiments of the present application, Figure 6 Combined with Figure 7As shown, the first side beam 11 has a first wall 113 and a second wall 114 spaced apart along the second direction, the first wall 113 faces the accommodating cavity, and the second wall 114 is away from the accommodating cavity; there is a hollow structure between the first wall 113 and the second wall 114, and an opening 1131 is arranged on the first wall 113; the distance between the two second walls 114 on the two first side beams 11 along the second direction is greater than the length of the expansion beam 13, and the distance between the two first walls 113 on the two first side beams 11 along the second direction is less than the length of the expansion beam 13, wherein the second direction is the direction from the first wall 113 to the second wall 114.

[0080] In this embodiment, if Figure 6 As shown, the second direction is the Y-axis direction, wherein the angle between the X-axis and the Y-axis may be 80°, 85°, 90°, etc. This embodiment is described by taking the X-axis and the Y-axis as being perpendicular to each other.

[0081] like Figure 7 As shown, the first wall 113 and the second wall 114 are spaced apart in the Y-axis direction, and a hollow structure is formed between the first wall 113 and the second wall 114. The two ends of the first wall 113 along the X-axis direction are connected to the two second side beams 12 correspondingly, and the two ends of the second wall 114 along the X-axis direction are connected to the two second side beams 12 correspondingly.

[0082] During assembly, since the distance between the two second walls 114 on the two first side beams 11 along the Y-axis is greater than the length of the expansion beam 13, and the distance between the two first walls 113 on the two first side beams 11 along the Y-axis is less than the length of the expansion beam 13, when the expansion beam 13 is installed in the two openings 1131 on the two first side beams 11, one end of the expansion beam 13 can also move along the Y-axis direction between the first wall 113 and the second wall 114 on one of the first side beams 11, which makes it easy to adjust the position of the expansion beam 13 in the Y-axis direction.

[0083] In this embodiment, after one end of the expansion beam 13 is inserted into one of the openings 1131, the other end of the expansion beam 13 is separated from the other opening 1131, and then the other end of the expansion beam 13 is inserted into the other opening 1131. When the expansion beam 13 needs to be disassembled, the above installation process can be reversed.

[0084] It should be noted that the structure of the first side beam is only an example. In other alternative solutions, other structures may also be used. For example, the first side beam includes a plurality of parallel surfaces. The present application does not impose any special restrictions on the specific structure of the first side beam, as long as the above structure can achieve the purpose of the present application.

[0085] According to some embodiments of the present application, the length of the expansion beam 13 is L1, the distance between the two first walls 113 is L2, and the size of the internal cavity of one of the first side beams 11 along the second direction is L3, wherein L1≤L2+L3.

[0086] Since L1≤L2+L3, when one end of the expansion beam 13 is fully inserted into one of the first side beams 11, the other end of the expansion beam 13 will be separated from the first wall 113 on the other first side beam 11, so that the expansion beam 13 can be removed from between the two first side beams 11.

[0087] According to some embodiments of the present application, Figure 7 Combined with Figure 8 As shown, the inner wall of the opening 1131 facing the bottom surface of the box body 10 is provided with a first sawtooth 115, and the side of the expansion beam 13 facing the bottom surface of the box body 10 is provided with a second sawtooth 131, and the first sawtooth 115 cooperates with the second sawtooth 131.

[0088] Since the first serration 115 cooperates with the second serration 131, when the expansion beam 13 is installed in the opening 1131, the second serration 131 on the expansion beam 13 is inserted into the first serration 115 on the opening 1131. In this way, under the limitation of the serration structure, it is possible to prevent one end of the expansion beam 13 facing the opening 1131 from moving relative to the opening 1131, thereby allowing the expansion beam 13 to be stably connected to the opening 1131 on the first wall 113.

[0089] According to some embodiments of the present application, both the first saw tooth 115 and the second saw tooth 131 extend along the first direction, and the second saw tooth 131 can move along the first direction relative to the first saw tooth 115 .

[0090] In this embodiment, the first sawtooth 115 and the second sawtooth 131 both extend along the X-axis direction. When the expansion beam 13 is installed in the opening 1131, the second sawtooth 131 on the expansion beam 13 can move left and right in the X-axis direction relative to the first sawtooth 115, so as to facilitate the adjustment of the position of the expansion beam 13 in the X-axis direction.

[0091] According to some embodiments of the present application, Figure 7 Combined with Figure 8 As shown, the teeth on the first sawtooth 115 and the second sawtooth 131 are both helical teeth, and the second sawtooth 131 can move unidirectionally along the first direction relative to the first sawtooth 115 .

[0092] In this embodiment, the inclination direction of the first sawtooth 115 is as follows: Figure 7 As shown, the inclination direction of the second sawtooth 131 is as follows Figure 8As shown, the first sawtooth 115 and the second sawtooth 131 have opposite inclination directions. When the expansion beam 13 is installed in the opening 1131, under the limitation of the inclination structure of the first sawtooth 115 and the second sawtooth 131, the second sawtooth 131 on the expansion beam 13 can only move toward the center of the accommodation cavity along the X-axis direction relative to the first sawtooth 115. In this way, the expansion beam 13 has the function of unidirectional movement and reverse cutoff relative to the first sawtooth 115. The expansion beam 13 can only move in one direction and stay at the required position, thereby improving the stability of the connection between the expansion beam 13 and the first side beam 11.

[0093] According to some embodiments of the present application, when the second saw tooth 131 moves to a preset position relative to the first saw tooth 115 , one end of the expansion beam 13 facing the first side beam 11 is welded to the first side beam 11 .

[0094] The welding method in this embodiment can be welding clamps, arc welding, etc. The specific method can be determined according to actual conditions, and this specification embodiment does not limit this.

[0095] The preset position in this embodiment is the position where the expansion beam 13 abuts against the battery cell after moving along the X-axis direction.

[0096] In this embodiment, the expansion beam 13 is welded to the first side beam 11 at one end thereof facing the first side beam 11 , so that the strength of the connection between the expansion beam 13 and the first side beam 11 can be improved.

[0097] According to some embodiments of the present application, Figure 7 As shown, the battery device further includes a baffle 116 , which is disposed on a side of the second wall 114 facing the first wall 113 .

[0098] In this embodiment, the baffle 116 is vertically arranged on the side of the second wall 114 facing the first wall 113. The baffle 116 can be integrally formed with the second wall 114, or the baffle 116 is snapped onto the second wall 114. The specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0099] refer to Figure 7 As shown, by setting a baffle 116 on the side of the second wall 114 facing the first wall 113, the spatial distance between the second wall 114 and the first wall 113 can be reduced. When the expansion beam 13 is installed in the opening 1131 and extends between the first wall 113 and the second wall 114, at this time, under the limitation of the baffle 116, the maximum dimension of the expansion beam 13 when extending into the opening 1131 is the distance between the baffle 116 and the first wall 113. In this way, it can be avoided that the dimension of the expansion beam 13 extending into the opening 1131 is too large.

[0100] According to some embodiments of the present application, the length of the expansion beam 13 is L1, the distance between the two first walls 113 is L2, and the dimension between the baffle 116 on one of the first side beams 11 and the first wall 113 along the second direction is L4, wherein L1≤L2+L4.

[0101] Since L1≤L2+L4, when one end of the expansion beam 13 is fully inserted into one of the first side beams 11, the expansion beam 13 abuts against the corresponding baffle 116, and the distance that the expansion beam 13 extends into the corresponding one of the first side beams 11 is L4. At this time, since L1≤L2+L4, the other end of the expansion beam 13 will be separated from the first wall 113 on the other first side beam 11, so that the expansion beam 13 can be removed from between the two first side beams 11.

[0102] According to some embodiments of the present application, Figure 8 As shown, a hollow portion 132 is provided inside the expansion beam 13 .

[0103] The hollow portion 132 of the present embodiment may be disposed along the length direction, width direction or height direction of the expansion beam 13 , and the specific direction may be determined according to actual conditions, and the present specification does not limit this.

[0104] Since the hollow portion 132 is provided inside the expansion beam 13 , the overall weight of the expansion beam 13 can be reduced, thereby facilitating the reduction of the weight of the battery box.

[0105] According to some embodiments of the present application, the battery device further includes a support beam 14 , which is disposed between the two first side beams 11 , and expansion beams 13 are disposed on both sides of the support beam 14 along the first direction.

[0106] The support beam 14 in this embodiment can be integrally formed with the two first side beams 11, or the support beam 14 can be welded between the two first side beams 11. The specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0107] In this embodiment, a support beam 14 is provided in the box body 10 , so that the strength of the box body 10 can be improved.

[0108] According to some embodiments of the present application, the first direction is a large-surface stacking arrangement direction of the battery cells.

[0109] The present application also provides an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0110] The specific structure of the battery device in this embodiment refers to the above embodiment. Since all the technical solutions of all the above embodiments are adopted in this electrical device, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein a receiving cavity is formed in the box body, and the box body has two first side beams arranged relatively and spaced apart; An expansion beam is arranged in the accommodating cavity, two ends of the expansion beam are detachably connected to the two first side beams, and the expansion beam can move relative to the first side beams along a first direction, wherein the first direction is the stacking arrangement direction of the battery cells.

2. The battery device according to claim 1, characterized in that: Openings are provided on opposite sides of the two first side beams, two ends of the expansion beam are correspondingly located in the two openings, and the expansion beam can move relative to the openings along the first direction.

3. The battery device according to claim 2, characterized in that: The first side beam has a first wall and a second wall spaced apart along a second direction, the first wall faces the accommodation cavity, and the second wall is away from the accommodation cavity; There is a hollow structure between the first wall and the second wall, and the opening is arranged in the first wall; The distance between the two second walls on the two first side beams along the second direction is greater than the length of the expansion beam, and the distance between the two first walls on the two first side beams along the second direction is less than the length of the expansion beam, wherein the second direction is the direction from the first wall to the second wall.

4. The battery device according to claim 3, characterized in that: The length of the expansion beam is L1, the distance between the two first walls is L2, and the size of the inner cavity of one of the first side beams along the second direction is L3, wherein L1≤L2+L3.

5. The battery device according to claim 3, characterized in that: The inner wall of the opening facing the bottom surface of the box body is provided with a first sawtooth, and the expansion beam is provided with a second sawtooth on one side facing the bottom surface of the box body, and the first sawtooth cooperates with the second sawtooth.

6. The battery device according to claim 5, characterized in that: The first sawtooth and the second sawtooth both extend along the first direction, and the second sawtooth can move along the first direction relative to the first sawtooth.

7. The battery device according to claim 6, characterized in that: The teeth on the first sawtooth and the second sawtooth are all bevel teeth, and the second sawtooth can move unidirectionally along the first direction relative to the first sawtooth.

8. The battery device according to claim 7, characterized in that: When the second saw tooth moves to a preset position relative to the first saw tooth, one end of the expansion beam facing the first side beam is welded to the first side beam.

9. The battery device according to claim 3, characterized in that: The battery device further includes a baffle, which is disposed on a side of the second wall facing the first wall.

10. The battery device according to claim 9, characterized in that: The length of the expansion beam is L1, the distance between the two first walls is L2, and the dimension between the baffle and the first wall on one of the first side beams along the second direction is L4, wherein L1≤L2+L4.

11. The battery device according to any one of claims 1 to 9, characterized in that: A hollow portion is provided inside the expansion beam.

12. The battery device according to any one of claims 1 to 9, characterized in that: The battery device further includes a support beam, wherein the support beam is disposed between the two first side beams, and the expansion beams are disposed on both sides of the support beam along the first direction.

13. The battery device according to claim 1, characterized in that: The first direction is the direction in which the battery cells are stacked and arranged on a large surface.

14. An electrical device, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 13.

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