Expansion beam, manufacturing device and method, battery, related device, system and network

Abstract

The invention belongs to the technical field of battery production, and provides an expansion beam, a manufacturing device and method, a battery, a related device, a system and a network, the expansion beam comprises a supporting structure layer, a cloth layer and a curing agent, the supporting structure layer comprises a plurality of core wires extending in a first direction, and the plurality of core wires are arranged in the first direction and define a forming cavity; the cloth layer wraps the outer surface of the supporting structure layer; the cloth layer at least comprises a first fiber body, a second fiber body and a third fiber body which are interwoven with one another, the first fiber body extends and is arranged along a second direction, and the second fiber body is configured to be crossed and arranged along a clockwise direction at a first included angle with the first fiber body; the third fiber body is configured to be crossed and arranged along the anticlockwise direction at a second included angle with the first fiber body; the second direction is perpendicular to the first direction; the curing agent is filled in gaps between the adjacent core wires so as to cure the supporting structure layer, and the curing agent is connected between the supporting structure layer and the cloth layer. The use durability of the expansion beam is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an expansion beam, manufacturing apparatus and method, battery, related devices, systems and networks. Background Technology

[0002] When the battery is charging and discharging, the battery cells will expand due to the heat generated. Therefore, expansion beams are usually installed on the casing. The expansion beams can deform, and when the battery cells expand, they squeeze the expansion beams to cope with the volume change of the battery cells.

[0003] In related technologies, expansion beams are typically made of plastic materials, which are prone to breakage when subjected to compression, resulting in poor durability and affecting battery lifespan. Summary of the Invention

[0004] The purpose of this application is to provide an expansion beam, a manufacturing apparatus and method, a battery, related devices, a system and a network, aimed at solving the technical problem of poor durability of expansion beams.

[0005] In a first aspect, this application provides an expansion beam, comprising:

[0006] The supporting structure layer includes multiple core wires extending along a first direction, and the multiple core wires are arranged around the first direction and surround the molding cavity.

[0007] A fabric layer is wrapped around the outer surface of the supporting structure layer; the fabric layer includes at least a first fiber body, a second fiber body and a third fiber body that are interwoven with each other, the first fiber body extends and is arranged along a second direction, the second fiber body is arranged to cross the first fiber body at a first angle in a clockwise direction, and the third fiber body is arranged to cross the first fiber body at a second angle in a counterclockwise direction; the second direction is perpendicular to the first direction;

[0008] The curing agent is filled in the gaps between adjacent core filaments and is connected between the support structure layer and the fabric layer so that the support structure layer and the fabric layer are cured into one piece.

[0009] In the embodiment, the support structure layer forms part of the main body structure of the expansion beam, the core wires in the support structure layer are cured and formed by the curing agent, and the cloth layer is wrapped on the outer surface of the support structure layer. The first fiber body, the second fiber body and the third fiber body in the cloth layer are interwoven, so that the cloth layer has enhanced anti-pulling ability. The core wires are arranged in the first direction, and the first fiber body in the cloth layer extends in the second direction perpendicular to the first direction, so that the cloth layer enhances the anti-deformation ability of the expansion beam in the second direction, and in combination with the second fiber body and the third fiber body interwoven on both sides of the first fiber body, the anti-deformation and anti-pulling performance of the expansion beam is further enhanced. In addition, the curing agent is filled between the core wires, the bonding ability between the core wires is enhanced, the curing agent plays a role of buffering the extrusion force, the extrusion resistance of the expansion beam is improved, the expansion beam is less likely to break, and the durability of the expansion beam is improved.

[0010] In one of the embodiments, the first included angle ranges from 15° to 60°; and / or

[0011] The second included angle ranges from 15° to 60°.

[0012] In the embodiment, the second fiber body and the third fiber body are interwoven with the first fiber body, respectively, so as to enhance the anti-pulling performance of the cloth layer within the range of 15°-60° on both sides of the second direction, which is beneficial to balanced stress and improved anti-deformation ability of the expansion beam.

[0013] In one of the embodiments, the cloth layer further includes a fourth fiber body interwoven and arranged with the first fiber body, the second fiber body and the third fiber body, and the fourth fiber body is arranged in the first direction.

[0014] In the embodiment, the fourth fiber body arranged in the first direction is added to the cloth layer, so as to enhance the anti-deformation ability of the cloth layer, and further improve the anti-pulling and anti-deformation ability of the expansion beam.

[0015] In one of the embodiments, the cloth layer includes a first layer and a second layer, the first layer is wrapped on the outer surface of the support structure layer, and the second layer is attached to the cavity wall surface of the mold cavity.

[0016] In the embodiment, the cloth layer is wrapped on the outer surface of the support structure layer, and at the same time, the cloth layer covers the cavity wall surface of the mold cavity of the support structure layer, so that the cloth layer wraps the support structure layer in all directions, thereby improving the anti-pulling and anti-deformation ability of the beam wall body of the expansion beam and reducing the risk of breaking of the expansion beam.

[0017] In one of the embodiments, the mold cavity has a first cavity wall and a second cavity wall, and at least one rib plate extends from the first cavity wall towards the second cavity wall.

[0018] In the embodiment, the rib plate is arranged to form a support in the cavity, thereby facilitating to enhance the deformation resistance of the expansion beam in the direction perpendicular to the first direction.

[0019] In a second aspect, the application further provides an expansion beam manufacturing device for manufacturing the expansion beam of any one of the above aspects, the expansion beam manufacturing device comprising:

[0020] A first feeding assembly for feeding the core wire;

[0021] A second feeding assembly for feeding the cloth layer;

[0022] A pre-forming die located at the discharge end of the first feeding assembly and the second feeding assembly, the pre-forming die being provided with a forming channel, the core wire and the cloth layer being inserted into the forming channel, and the forming channel being capable of gradually reducing the core wire and the cloth layer in the first direction to pre-form the core wire and the cloth layer into a preset shape;

[0023] A setting assembly located at the discharge end of the pre-forming die, the core wire, the cloth layer and the curing agent being cured and set into a set shape in the setting assembly;

[0024] A traction forming assembly located at the discharge end of the setting assembly, the traction forming assembly being used for stretching and forming the core wire and the cloth layer.

[0025] In the embodiment, the manufacturing device is used for pre-forming the core wire and the cloth layer before setting the core wire and the cloth layer, so that the core wire and the cloth layer can be pre-formed into a preset shape close to the set shape through the pre-forming channel, and the core wire and the cloth layer are gradually arranged through the pre-forming tool, and are gradually changed from the preset shape to the set shape, so that the core wire and the cloth layer are not easy to be knotted and associated in the process of transmission and setting.

[0026] In one of the embodiments, the pre-forming die comprises a plurality of forming frames arranged in sequence and spaced apart along the first direction, each forming frame being provided with a forming sub-channel, and the outer contour size of each forming sub-channel along the first direction is in a decreasing trend, so that the core wire and the cloth layer gradually reduced and set into the preset shape when passing through each forming sub-channel in sequence.

[0027] In the embodiment, the pre-forming die adopts the form of combination of a plurality of forming frames, the core wire and the cloth layer are limited in shape once through a forming frame, and the preset shape is formed after passing through a plurality of forming frames, which is beneficial to simplify the structure of the pre-forming die, reduce the weight of the die, and improve the flexibility of the die in use.

[0028] In one of the embodiments, the forming channel has a channel axis corresponding to the center of the expansion beam, the forming channel comprises a first sub-channel and a second sub-channel, the first sub-channel is used for inserting the core wire, the second sub-channel is used for inserting the cloth layer, and the second sub-channel is located on the side of the first sub-channel away from the channel axis.

[0029] In this embodiment, the first sub-channel and the second sub-channel are used to separately transport and pre-shape the core wire and the fabric layer, thereby making it less likely for the core wire to tangle or become tangled during the transmission and pre-shaping process. In addition, it also makes it less likely for the fabric layer to tangle or become tangled during the transmission and pre-shaping process. Transporting the core wire and the fabric layer separately reduces the disorder in the arrangement of the core wire and the fabric layer, which is beneficial to improving the forming quality of the expansion beam.

[0030] In one embodiment, the shaping component includes a third feeding component and a shaping mold, with the core filament and fabric layer passing through the shaping mold. The third feeding component is connected to the shaping mold and can deliver a curing agent into the shaping mold so that the core filament and fabric layer can be cured and formed.

[0031] In this embodiment, the shaping component is used to shape and cure the core filaments and fabric layers, ensuring that the cross-sectional shape of the core filaments and fabric layers is shaped into a fixed shape, that is, shaped into the cross-sectional outline shape of the formed expansion beam. The third feeding component delivers curing agent to the shaping mold during the shaping process, facilitating the shaping of the core filaments and fabric layers, making the overall structure of the shaping component more compact and easier to use.

[0032] Thirdly, this application also provides a method for manufacturing an expansion beam, characterized in that the method is used to prepare an expansion beam as described in any of the above claims, and the method includes the following steps:

[0033] Pre-formed core fibers and fabric layers;

[0034] The core filament and fabric layer are passed through a pre-forming mold, causing the core filament and fabric layer to form a tapering trend along the first direction;

[0035] The core filaments, fabric layers, and curing agent are cured and shaped into a fixed form using a shaping component.

[0036] The core filament and fabric layers are stretched and shaped using a traction forming assembly.

[0037] In this embodiment, before the core filaments and fabric layers are shaped, a pre-forming process is performed on the core filaments and fabric layers, so that the core filaments and fabric layers can be pre-shaped into a preset shape close to the shaped shape through the pre-forming channel. The core filaments and fabric layers are pre-shaped and arranged by the pre-forming tool, and then transition from the preset shape to the shaped shape, so that the core filaments and fabric layers are less likely to get tangled or stuck during the transmission and shaping process.

[0038] In one embodiment, in the step of the core filament and the fabric layer passing through the preforming mold, the preforming mold causes the core filament to pass through a first sub-channel and the fabric layer to pass through a second sub-channel, the first sub-channel and the second sub-channel being arranged parallel to each other at an interval.

[0039] In the embodiment, the preforming mold can arrange and transport the core wires and the cloth layer in zones, so that the core wires and the cloth layer are not prone to mutual friction, and the core wires and the fiber bodies in the cloth layer are not prone to knotting and related problems, thereby improving the quality of the expansion beam.

[0040] In one of the embodiments, in the step of gradually tapering the core wires and the cloth layer in the first direction, the preforming mold comprises a plurality of forming frames arranged in sequence along the first direction, each forming frame is provided with a forming sub-channel, and the outer contour size of each forming sub-channel gradually decreases in the first direction, so that the core wires and the cloth layer gradually taper to the preset shape after passing through each forming sub-channel in sequence.

[0041] In the embodiment, the preforming mold is combined by a plurality of forming frames, the core wires and the cloth layer pass through one forming frame to limit the shape once, and the preset shape is formed after passing through a plurality of forming frames, thereby simplifying the structure of the preforming mold, reducing the weight of the mold, and improving the flexibility of the mold.

[0042] In a fourth aspect, the application further provides a battery, which comprises a battery cell assembly, a box body, and an expansion beam according to any one of the above.

[0043] In the embodiment, the expansion beam is arranged in the box body, and the battery cell assembly is located on one side of the expansion beam, so that the expansion beam can absorb and disperse the extrusion force when the battery cell assembly expands due to heat.

[0044] In one of the embodiments, the battery further comprises a support arranged in the accommodating space, the expansion beam and the support are arranged in the first direction, the expansion beam has a first side wall on one side in the first direction, the support is arranged in the first direction and connected with the first side wall, the support is connected with the box body, and the support is arranged opposite to the battery cell assembly.

[0045] In the embodiment, the support and the battery cell assembly are arranged on two sides of the expansion beam respectively, so that the expansion beam can absorb and disperse the extrusion force when the battery cell assembly expands due to heat, and the support can provide a support force opposite to the extrusion force to the expansion beam, thereby improving the support of the expansion beam, reducing the bending deformation of the expansion beam due to the extrusion force, and improving the stability of the connection between the expansion beam and the box body.

[0046] In one of the embodiments, the box body comprises a first box wall; the support member comprises a first connecting portion and a protruding portion, which are arranged along a first direction parallel to the first box wall, the first connecting portion is connected to the first box wall, and the protruding portion is connected to the first connecting portion and protrudes from the first connecting portion away from the first box wall.

[0047] In the embodiment, the support member is connected to the box body through the first connecting portion and forms a contact area between the protruding portion and the expansion beam, so as to improve the support effect of the support member on the expansion beam and improve the support stability.

[0048] In one of the embodiments, the protruding portion comprises a support arm body which is outwardly bent away from the first box wall, the support arm body is arranged along the first direction, a support cavity is formed between the support arm body and the first box wall, and the support arm body is connected to the expansion beam; the first connecting portion is located on a side of the support arm body away from the expansion beam and is connected to the support arm body.

[0049] In the embodiment, the protruding portion is prepared by using the outwardly bent support arm body, so that the support arm body and the first box wall jointly form the support cavity, the stress can be absorbed and dispersed through the support cavity, so as to improve the support effect of the support arm body on the expansion beam, reduce stress concentration, and improve the support stability.

[0050] In one of the embodiments, the support arm body comprises a first sub-wall body arranged along the first direction, and the first sub-wall body is arranged in close contact with the first side wall.

[0051] In the embodiment, the first sub-wall body arranged in close contact with the first side wall is arranged, so as to facilitate increasing the support area between the support arm body and the expansion beam, thereby improving the support capacity of the support arm body on the expansion beam and improving the support stability.

[0052] In one of the embodiments, the battery device further comprises a bonding structure connected between the first sub-wall body and the first side wall.

[0053] In the embodiment, the bonding structure can bond and fix the support arm body on the expansion beam, so as to enhance the connection strength between the support arm body and the expansion beam, thereby improving the support strength and the support stability of the expansion beam.

[0054] In one of the embodiments, the support arm body further comprises a second sub-wall body and a third wall body arranged along the first direction, the second sub-wall body is connected to the first sub-wall body, the third wall body is connected between the second sub-wall body and the first connecting portion, and the first sub-wall body, the second sub-wall body, the third wall body and the first box wall jointly form the support cavity.

[0055] In the embodiment, the first sub-wall body, the second sub-wall body, the third wall body and the first box wall body jointly form a support cavity, so that the support arm body as a whole can be made of a profile structure, the overall structure of the support arm body is simple and convenient to manufacture, which is conducive to reducing the overall weight and facilitating the lightweight of the battery.

[0056] In one of the embodiments, the support member further comprises a second connecting portion extending in the first direction, the second connecting portion is located on the two sides of the protruding portion respectively, and the second connecting portion is connected with the protruding portion, the second connecting portion is connected with the first box wall body, and the expansion beam abuts on the second connecting portion.

[0057] In the embodiment, the second connecting portion is connected with the first box wall body, so as to enhance the connection strength between the support member and the box body, further improve the support capacity of the support member to the expansion beam, and improve the reliability of the connection between the expansion beam and the box body.

[0058] In one of the embodiments, the second connecting portion is in a plate shape, and the second connecting portion is arranged in abutment with and connected with the first box wall body.

[0059] In the embodiment, the plate-shaped second connecting portion can increase the connection area between the support member and the first box wall body, enhance the connection strength between the support member and the box body, and can also support the expansion beam.

[0060] In one of the embodiments, the first connecting portion is in a plate shape, and the first connecting portion is arranged in abutment with and connected with the first box wall body.

[0061] In the embodiment, the plate-shaped first connecting portion can increase the connection area between the support member and the first box wall body, and enhance the connection strength between the support member and the box body.

[0062] In one of the embodiments, the first connecting portion is welded and fixed with the first box wall body; and / or

[0063] The second connecting portion is welded and fixed with the first box wall body.

[0064] In the embodiment, the welding manner is adopted to enhance the firmness of the connection between the first connecting portion and the box body and the second connecting portion and the box body respectively, and is convenient to operate, without the need to increase other components, which is conducive to simplifying the structure and reducing the production cost.

[0065] In one of the embodiments, the battery device further comprises a first locking assembly, and the first locking assembly is connected with the support member and the expansion beam respectively.

[0066] In the embodiment, the first locking assembly is additionally provided to further connect and fix the protruding portion and the expansion beam, so as to enhance the connection firmness between the support member and the expansion beam, and is conducive to improving the support stability of the support member to the expansion beam.

[0067] In one of the embodiments, the first side wall body is provided with a locking arm protruding therefrom; the locking arm is arranged in abutment with the second sub-wall body; and the first locking assembly is connected with the locking arm and the second sub-wall body, respectively.

[0068] In the embodiment, the locking arm is arranged on the first side wall body, and the first locking assembly is connected between the locking arm and the second sub-wall body, so that the installation and disassembly are facilitated, the main structure of the expansion beam is not easily damaged, and the expansion beam is protected.

[0069] In one of the embodiments, the battery comprises at least two structural beam assemblies arranged in spaced apart manner, each of the structural beam assemblies comprises an expansion beam and a support, and each of the expansion beams is connected to the first box wall body of the box body; and the structural beam assembly further comprises at least one fixing belt, and two ends of each of the fixing belts are connected to the ends of any two expansion beams away from the first box wall body.

[0070] In the embodiment, the fixing belt is arranged to enable the plurality of structural beam assemblies to form an integral structure, improve the compactness of the integral structure, and enhance the connection strength and rigidity between the structural beams, so as to reduce the deformation probability of the expansion beam and limit the battery monomer assembly to a certain extent.

[0071] In one of the embodiments, the battery further comprises a plurality of second locking assemblies, and any one end of the fixing belt is connected to the expansion beam through at least one second locking assembly.

[0072] In the embodiment, the fixing belt is detachably connected between the second locking assembly and the expansion beam, so that the installation and disassembly between the fixing belt and the expansion beam are more convenient.

[0073] In one of the embodiments, the second locking assembly comprises a locking seat and a locking piece, the locking seat is connected to the expansion beam, and the locking piece is connected to the locking seat and the fixing belt, respectively.

[0074] In the embodiment, the locking seat is arranged to enable the fixing belt not to be directly connected to the expansion beam, and the tensile force on the fixing belt is not directly applied to the expansion beam, but the stress is dispersed and absorbed through the locking seat, so that the expansion beam is protected.

[0075] In a fifth aspect, the application provides an energy storage device, comprising a plurality of batteries according to any one of the above, and the batteries are used for storing or providing electric energy.

[0076] In a sixth aspect, the application provides an energy storage system, comprising a power conversion device and the energy storage device, and the power conversion device is used for electrically connecting a power generation device and the energy storage device.

[0077] In a seventh aspect, the present application provides a power utilization device comprising the battery of any one of the above, the energy storage device of the above, or the energy storage system of the above, the battery being used to store or provide electric energy.

[0078] In an eighth aspect, the present application provides a charging network comprising a charging pile and the energy storage device of the above or the energy storage system of the above, the energy storage device being used to provide electric energy for the charging pile.

[0079] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the following specific embodiments of the present application are implemented according to the content of the description, and in order to make the above and other purposes, characteristics 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

[0080] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0081] Figure 1 The front view of the expansion beam provided for some embodiments of the present application Figure 1 ;

[0082] Figure 2 The front view of the expansion beam provided for some embodiments of the present application Figure 2 ;

[0083] Figure 3 The schematic structural diagram of the expansion beam provided for some embodiments of the present application

[0084] Figure 4 The local enlarged view of the C position in Figure 3 ;

[0085] Figure 5 The structural schematic diagram of the expansion beam manufacturing device provided for some embodiments of the present application

[0086] Figure 6 The structural schematic diagram of the preforming mold in Figure 5 ;

[0087] Figure 7 The structural schematic diagram of the shaping assembly in Figure 5 ;

[0088] Figure 8 The structural schematic diagram of the traction shaping assembly in Figure 5 ;

[0089] Figure 9Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0090] Figure 10 Exploded structural schematic diagram of a battery provided for some embodiments of the present application;

[0091] Figure 11 Structural schematic diagram of the connection between the box and the expansion beam in a battery provided for some embodiments of the present application Figure 1 ;

[0092] Figure 12 A-A sectional view of Figure 11 ;

[0093] Figure 13 Enlarged view of the B position in Figure 12 ;

[0094] Figure 14 Structural schematic diagram of the support in Figure 13 ;

[0095] Figure 15 Axonometric view of Figure 11 ;

[0096] Figure 16 Structural schematic diagram of the connection between the expansion beam and the first and second locking assemblies in a battery provided for some embodiments of the present application;

[0097] Figure 17 Exploded structural schematic diagram of Figure 15 ; Figure 1 ;

[0098] Figure 18 Exploded structural schematic diagram of Figure 15 ; Figure 2 ;

[0099] Figure 19 Structural schematic diagram of the connection between the box and the expansion beam in a battery provided for some embodiments of the present application Figure 2 .

[0100] BRIEF DESCRIPTION OF THE DRAWINGS:

[0101] 1000, vehicle; 1100, battery; 1110, box body; 1111, first part; 1112, second part; 1113, accommodating space; 1114, first box wall body; 1120, battery cell assembly; 1130, structural beam assembly; 1131, expansion beam; 11311, cavity; 11312, first side wall body; 11313, third side wall body; 11314, second side wall body; 11315, fourth side wall body; 11316, locking arm; 11317, rib plate; 11318, support structure layer; 113181, core wire; 11319, cloth layer; 113191, first fiber body; 113192, second fiber body; 113193, third fiber body; 113194, fourth fiber body; 113195, first layer; 113196, second layer; 11320, curing agent; 1132, support; 11321, first connecting part; 11322, protruding part; 113221, support arm body; 113222, first sub-wall body; 113223, second sub-wall body; 113224, third wall body; 11323, second connecting part; 1133, first locking assembly; 1134, support cavity; 1135, bonding structure; 1140, fixing belt; 1150, second locking assembly; 1151, locking seat; 1152, locking piece; 1160, support body; X, first direction; 2000, expansion beam manufacturing device; 2100, first feeding assembly; 2200, second feeding assembly; 2300, preforming mold; 2310, forming frame; 2311, forming sub-channel; 23111, first sub-channel; 23112, second sub-channel; 2400, shaping assembly; 2410, shaping mold; 2420, third feeding assembly; 2430, pouring channel; 2440, shaping cavity; 2500, traction forming assembly; 2510, traction cavity. DETAILED DESCRIPTION

[0102] The embodiments of the technical solution of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore only serve as embodiments, but cannot limit the protection scope of the present application.

[0103] 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 terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0104] 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 explicitly specified and limited.

[0105] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0106] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0107] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0108] In the description of the embodiments of the present 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, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 limiting the embodiments of the present application.

[0109] In the description of the embodiments of the present 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 present application can be understood according to the specific circumstances.

[0110] A battery apparatus can include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0111] A battery can be a battery pack, which generally includes a box and one or more battery cell assemblies accommodated in the box. When the battery is charged and discharged, the battery cell assemblies are heated and expanded, and the expanded battery cell assemblies can generate stress or damage to the box, causing the box to deform. Therefore, in the related art, an expansion beam is generally arranged inside the box, which can be deformed or transformed. When the battery cell assemblies are expanded, the expansion beam is pressed, and the expansion beam is deformed to absorb and disperse the stress generated by thermal expansion, so as to cope with the volume change and stress damage of the battery cell assemblies. It can be seen that the expansion beam will be subjected to a large pressing stress.

[0112] In the related art, the expansion beam is usually made of plastic material, which is prone to breakage when pressed. The durability is poor, which affects the service life of the battery.

[0113] Therefore, the present application provides an expansion beam. In the beam wall of the expansion beam, the cloth layer is wrapped around the outer surface of the support structure layer. The support structure layer and the cloth layer are bonded and fixed by solidification, thereby forming a whole and improving the compactness and structural strength of the beam wall structure. In addition, three fiber bodies are arranged in the cloth layer. The first fiber body extends along the second direction, so that the first fiber body is wrapped around the outer periphery of the support structure layer around the first direction. The second fiber body and the third fiber body are interwoven at an angle with the first fiber body, thereby improving the overall strength and toughness of the cloth layer. The support structure layer and the cloth layer are bonded and solidified by a solidifying agent, thereby forming a whole, thereby improving the flexibility and anti-deformation ability of the entire expansion beam, improving the overall mechanical properties of the expansion beam, enhancing the durability of the expansion beam, and thereby improving the service life of the battery.

[0114] The present application embodiment is described by taking the expansion beam 1131 applied to the battery 1100 as an example. Referring to Figure 10As shown, the battery 1100 includes a box body 1110 and a battery cell assembly 1120 accommodated in an accommodation space 1113 of the box body 1110, wherein an expansion beam 1131 is connected to the box body 1110 and located in the accommodation space 1113 of the box body 1110. The battery cell assembly 1120 is provided with one or more, and the battery 1100 disclosed in the embodiments of the present application can be used in various energy storage devices and energy storage systems using the battery 1100 as a power source or using the battery 1100 as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0115] The following embodiments are described for convenience with a vehicle 1000 as an example of a power consumption device in an embodiment of the present application.

[0116] Please refer to Figure 9 , Figure 9 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, etc. The vehicle 1000 is internally provided with a battery 1100, which can be arranged at the bottom, head or 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 source of the vehicle 1000. The vehicle 1000 can also include a controller and a motor, and the controller is used to control the battery 1100 to supply power to the motor, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0117] In some embodiments of the present application, the battery 1100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0118] Please refer to Figure 10 as shown, Figure 10An exploded view of a battery 1100 is provided for some embodiments of the present application. Specifically, the battery 1100 includes a box 1110 and a battery cell assembly 1120, the box 1110 has a receiving space 1113 formed therein, and the battery cell assembly 1120 is received in the receiving space 1113. The battery cell assembly 1120 is usually formed by arranging a plurality of battery cells, or the battery cell assembly 1120 can also be a battery module formed by arranging and fixing a plurality of battery cells. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie. The box 1110 is used to provide the receiving space 1113 for the battery cell assembly 1120, and the box 1110 can have various structures.

[0119] A battery cell refers to the smallest unit that constitutes the battery 1100. Each battery cell can be a secondary battery cell or a primary battery cell, and can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes.

[0120] The box 1110 is also used to accommodate and connect the expansion beam 1131. The box 1110 can include a first part 1111 and a second part 1112, the first part 1111 and the second part 1112 are overlapped with each other, and the first part 1111 and the second part 1112 together define the receiving space 1113 for accommodating the battery cell assembly 1120. The second part 1112 can be a hollow structure with one end open, and the first part 1111 can be a plate-shaped structure, the first part 1111 is overlapped with the open side of the second part 1112, so that the first part 1111 and the second part 1112 together define the receiving space 1113; the first part 1111 and the second part 1112 can also be hollow structures with one side open, and the open side of the first part 1111 is overlapped with the open side of the second part 1112. Of course, the box 1110 formed by the first part 1111 and the second part 1112 can have various shapes, such as a cylindrical shape, a cuboid shape, etc.

[0121] According to some embodiments of the present application, referring to Figures 1-4As shown, the expansion beam 1131 comprises a support structure layer 11318, a cloth layer 11319, and a curing agent 11320. The support structure layer 11318 comprises a plurality of core wires 113181 extending along the first direction X, and the plurality of core wires 113181 are arranged around the first direction X and surround the molding cavity 11311. The cloth layer 11319 is wrapped on the outer surface of the support structure layer 11318. The cloth layer 11319 comprises at least a first fiber body 113191, a second fiber body 113192, and a third fiber body 113193 which are interwoven with each other. The first fiber body 113191 extends along the second direction Y. The second fiber body 113192 is arranged to cross the first fiber body 113191 at a first included angle a in a clockwise direction. The third fiber body 113193 is arranged to cross the first fiber body 113191 at a second included angle β in a counterclockwise direction. The second direction Y is perpendicular to the first direction X. The curing agent 11320 is filled in the gaps between adjacent core wires 113181 to cure the support structure layer 11318. The curing agent 11320 is connected between the support structure layer 11318 and the cloth layer 11319, so that the support structure layer 11318 and the cloth layer 11319 are cured into one body.

[0122] The first direction X is the extension direction of the expansion beam 1131, which can be considered as the length direction of the expansion beam 1131. The second direction Y is perpendicular to the first direction X. The cross section of the expansion beam 1131 is parallel to the first direction X, so the second direction Y can be considered as the direction parallel to the cross section.

[0123] For the support structure layer 11318, the support structure layer 11318 can be considered to form part of the main frame of the expanded beam 1131, the support structure layer 11318 is tightly attached and arrayed according to the cross-sectional profile shape of the expanded beam 1131 by a large number of core wires 113181, the core wires 113181 are all arranged along the first direction X, and the plurality of core wires 113181 are arranged around the axis of the first direction X, thereby surrounding to form the cavity 11311 of the expanded beam 1131, the core wires 113181 are arranged in multiple layers or multiple turns around the first direction X, thereby forming the wall thickness of the beam wall body of the expanded beam 1131, the support structure layer 11318 forms the main frame of the wall structure of the hollow expanded beam 1131. The cross-sectional outer profile shape of the support structure layer 11318 can be polygonal, circular, oval, or a combination of straight lines and curves. The support structure layer 11318 has an inner surface and an outer surface, wherein the inner surface can be considered as the cavity wall surface of the cavity 11311. It should be noted that, since the core wires 113181 in the support structure layer 11318 are independent of each other, the curing agent 11320 is filled in the gaps or voids between the adjacent core wires 113181 by filling the curing agent 11320 in the support structure layer 11318, so that the curing agent 11320 is integrated with the support structure layer 11318. The core wires 113181 can be made of metal or non-metal materials, for example, the core wires 113181 can be made of non-metallic sand silk such as glass silk, glass fiber, etc. The glass fiber has the characteristics of not easy to conduct electricity, good corrosion resistance, and high tensile strength. The directional tensile strength of unidirectional fiber pultrusion composite material can reach 1000 MPa.

[0124] For the cloth layer 11319, the cloth layer 11319 is wrapped on the outer surface of the support structure layer 11318, so it can be known that the cloth layer 11319 forms the outer surface of the expanded beam 1131. The cloth layer 11319 at least includes the first fiber body 113191, the second fiber body 113192, and the third fiber body 113193 which are interwoven, that is, the cloth layer 11319 is woven or interwoven by at least three fiber bodies, the three fiber bodies are the first fiber body 113191, the second fiber body 113192, and the third fiber body 113193, and it can be understood that the first fiber body 113191, the second fiber body 113192, and the third fiber body 113193 each have a plurality of.

[0125] Specifically, the plurality of first fiber bodies 113191 are arranged in extension along the second direction Y, which can be understood as that the first fiber bodies 113191 are wound around the first direction X within the cross section of the support structure layer 11318, so as to form a first fiber body layer which can be arranged around the circumference of the support structure layer 11318. The second fiber body 113192 and the third fiber body 113193 are arranged at an angle with the first fiber body 113191 respectively, and the second fiber body 113192 and the third fiber body 113193 are located on two sides of the first fiber body 113191 respectively. Specifically, the second fiber body 113192 is arranged to cross the first fiber body 113191 at a first angle a in the clockwise direction, and the third fiber body 113193 is arranged to cross the first fiber body 113191 at a second angle β in the counterclockwise direction. The first angle a and the second angle β can be greater than 0° and less than or equal to 90°, for example, the first angle a can be 5°, 10°, 15°, 20°, 30°, 45°, 60° or 90°, and the second angle β can be 5°, 10°, 15°, 20°, 30°, 45°, 60° or 90°. The first angle a can be equal to or different from the second angle β. When the first angle a is equal to the second angle β, the second fiber body 113192 and the third fiber body 113193 are symmetrically arranged about the first fiber body 113191.

[0126] The first fiber body 113191, the second fiber body 113192 and the third fiber body 113193 can be made of natural fibers, synthetic fibers or the like. For example, the first fiber body 113191, the second fiber body 113192 and the third fiber body 113193 can all be made of carbon fibers. Carbon fibers have the characteristics of high strength, high modulus, light weight and corrosion resistance.

[0127] The curing agent 11320 is used to connect the support structure layer 11318 and the cloth layer 11319. During the process of making the expanded beam 1131, the cloth layer 11319 is wrapped around the support structure layer 11318, and then the curing agent 11320 is poured to connect and fix the cloth layer 11319 and the support structure layer 11318, so as to form an integral structure. The curing agent 11320 can be made of various adhesives, such as resins, for example, polyurethane, epoxy, vinyl, etc.

[0128] In the example, it can also be understood that the expanded beam 1131 includes a beam wall body, the beam wall body is arranged around the first direction X to form a forming cavity 11311, and the beam wall body includes a support structure layer 11318, a cloth layer 11319 and a curing agent 11320, the curing agent 11320 cures the support structure layer 11318, and the curing agent 11320 is connected with the support structure layer 11318 and the cloth layer 11319 respectively, so that the three are cured to form the beam wall body of the structural beam.

[0129] In the embodiment, the support structure layer 11318 forms part of the main structure of the expanded beam 1131, the core wires 113181 in the support structure layer 11318 are cured and formed by the curing agent 11320, the cloth layer 11319 is wrapped on the outer surface of the support structure layer 11318, the first fiber body 113191, the second fiber body 113192 and the third fiber body 113193 in the cloth layer 11319 are interwoven, so that the cloth layer 11319 has enhanced anti-pulling ability, the core wires 113181 are arranged along the first direction X, and the first fiber body 113191 in the cloth layer 11319 extends along the second direction Y perpendicular to the first direction X, so that the cloth layer 11319 enhances the anti-deformation ability of the expanded beam 1131 in the second direction Y, and in combination with the second fiber body 113192 and the third fiber body 113193 interwoven on both sides of the first fiber body 113191, further enhances the anti-deformation and anti-pulling performance of the expanded beam 1131; in addition, the curing agent 11320 is filled between the core wires 113181, the combination ability between the core wires 113181 is enhanced, the curing agent 11320 plays a role of buffering extrusion force, improves the anti-extrusion ability of the expanded beam 1131, so that the expanded beam 1131 is not easy to break, and the durability of the expanded beam 1131 is improved.

[0130] In some embodiments, referring to Figures 1-5 As shown, the first included angle a is in the range of 15°-60°.

[0131] The second fiber body 113192 and the first fiber body 113191 form an included angle of 15°-60°, and the first included angle a can be any value between 15°-60°, for example, the second fiber body 113192 and the first fiber body 113191 can form an included angle of 15°, 20°, 25°, 30°, 40°, 45°, 50°, 60°, etc. The second fiber body 113192 and the first fiber body 113191 are arranged at the first included angle a, so that the cloth layer 11319 has strong anti-pulling performance in the direction along the clockwise direction and the first fiber body 113191 at an included angle of 15°-60°.

[0132] In some embodiments, referring to Figures 1-5 As shown, the second included angle β is in the range of 15°-60°.

[0133] The third fiber body 113193 and the first fiber body 113191 form an angle of 15°-60°, and the second angle β can be any value between 15°-60°, for example, the third fiber body 113193 and the first fiber body 113191 can form an angle of 15°, 20°, 25°, 30°, 40°, 45°, 50°, 60°, etc. The third fiber body 113193 and the first fiber body 113191 form the first angle a, so that the cloth layer 11319 has strong anti-pulling performance in the direction of 15°-60° counterclockwise with the first fiber body 113191. For a group of fiber bodies, the second fiber body 113192 and the third fiber body 113193 can be symmetrically arranged relative to the first fiber body 113191, and the first fiber body 113191, the second fiber body 113192 and the third fiber body 113193 can intersect at a point.

[0134] In the embodiment, the second fiber body 113192 and the third fiber body 113193 are respectively interwoven with the first fiber body 113191, thereby enhancing the anti-pulling performance of the cloth layer 11319 in the range of 15°-60° on both sides of the second direction Y, which is beneficial to balanced stress and improves the anti-deformation ability of the expansion beam 1131.

[0135] In some embodiments, referring to Figures 3-5 As shown in the figure, the cloth layer 11319 further includes a fourth fiber body 113194 interwoven with the first fiber body 113191, the second fiber body 113192 and the third fiber body 113193, and the fourth fiber body 113194 extends along the first direction X.

[0136] It should be noted that the fourth fiber body 113194 is provided in plurality, and each fourth fiber body 113194 is arranged along the first direction X, so that the extension direction of the fourth fiber body 113194 is the same as the extension direction of the core wire 113181, and thus the fourth fiber body 113194 is arranged parallel to the core wire 113181 after the cloth layer 11319 is wrapped on the support structure layer 11318, thereby enhancing the anti-pulling ability of the expansion beam 1131 in the first direction X. The fourth fiber body 113194 intersects with the first fiber body 113191, the second fiber body 113192 and the third fiber body 113193, thereby improving the density and anti-deformation ability of the cloth layer 11319.

[0137] In the embodiment, by increasing the fourth fiber body 113194 arranged along the first direction X in the cloth layer 11319, the anti-deformation ability of the cloth layer 11319 is enhanced, and thus the anti-pulling and anti-deformation ability of the expansion beam 1131 is improved.

[0138] In some embodiments, referring to Figures 3-5 As shown in the drawings, the cloth layer 11319 includes a first layer 113195 and a second layer 113196, the first layer 113195 wraps the outer surface of the support structure layer 11318, and the second layer 113196 is attached to the cavity wall surface of the cavity 11311.

[0139] Specifically, the first layer 113195 and the second layer 113196 can be two independent parts, that is, the first layer 113195 and the second layer 113196 can not be connected, the first layer 113195 is attached to the outer surface of the support structure layer 11318, and the second layer 113196 is attached to the cavity wall of the cavity 11311 of the support structure layer 11318, so that the cloth layer 11319 can support the inside and outside of the support structure layer 11318 respectively, and the curing agent 11320 bonds and solidifies the first layer 113195, the second layer 113196 and the support structure layer 11318 into an integrated structure, thereby further enhancing the anti-deformation and anti-pulling performance of the overall expansion beam 1131.

[0140] Alternatively, the first layer 113195 and the second layer 113196 can be an integrated structure, that is, the first layer 113195 and the second layer 113196 can be connected, that is, the cloth layer 11319 can cover and wrap the outer surface of the support structure layer 11318 and the cavity wall surface of the cavity 11311, so that the overall structure of the expansion beam 1131 is more compact.

[0141] In this embodiment, the cloth layer 11319 wraps the outer surface of the support structure layer 11318, and also covers the cavity wall surface of the cavity 11311 of the support structure layer 11318, so that the cloth layer 11319 wraps the support structure layer 11318 in all directions, thereby facilitating the improvement of the anti-pulling and anti-deformation ability of the beam wall of the expansion beam 1131, and reducing the risk of fracture of the expansion beam 1131.

[0142] In some embodiments, referring to Figures 3-5 As shown in the drawings, the cavity 11311 has a first cavity wall and a second cavity wall, and at least one rib plate 11317 extends from the first cavity wall to the second cavity wall.

[0143] Specifically, the outer shape of the rib plate 11317 is in a sheet or plate shape, the rib plate 11317 can be formed by arranging a plurality of core filaments 113181 in the first direction X, and the core filaments 113181 in the rib plate 11317 also need to be cured by the curing agent 11320 to form an integral whole. When the support structure layer 11318 is prepared, the rib plate 11317 can be prepared at the same time, the support structure layer 11318 and the rib plate 11317 are poured together with the curing agent 11320 to be cured to form an integrally formed structure, which improves the rigidity, strength and anti-deformation ability of the entire structure. The first cavity wall and the second cavity wall are arranged adjacent to or opposite to each other, and the rib plate 11317 can be provided with one or more, and the plurality of rib plates 11317 are arranged at intervals, or the plurality of rib plates 11317 can also be arranged intersecting each other.

[0144] The outer surface of the rib plate 11317 can be wrapped with a cloth layer 11319, and the cloth layer 11319 and the outer surface of the rib plate 11317 are bonded and fixed by the curing agent 11320, thereby enhancing the anti-pulling and anti-deformation ability of the rib plate 11317.

[0145] In the embodiment, by arranging the rib plate 11317, a support is formed in the cavity 11311, thereby facilitating to enhance the anti-deformation ability of the expansion beam 1131 in the direction perpendicular to the first direction X.

[0146] In some specific embodiments, with reference to Figures 1-8As shown, the expansion beam 1131 comprises a support structure layer 11318, a cloth layer 11319 and a curing agent 11320, wherein the support structure layer 11318 comprises a plurality of core wires 113181 extending along the first direction X, the plurality of core wires 113181 are arranged around the first direction X and surround the molding cavity 11311; the cloth layer 11319 is wrapped on the outer surface of the support structure layer 11318; the cloth layer 11319 at least comprises first fiber bodies 113191, second fiber bodies 113192 and third fiber bodies 113193 which are interwoven with each other, the first fiber bodies 113191 extend along the second direction Y, the second fiber bodies 113192 are arranged to cross the first fiber bodies 113191 at a first included angle a in a clockwise direction, and the third fiber bodies 113193 are arranged to cross the first fiber bodies 113191 at a second included angle β in a counterclockwise direction; the second direction Y is perpendicular to the first direction X; the curing agent 11320 is filled in the gap between adjacent core wires 113181, and the curing agent 11320 is connected between the support structure layer 11318 and the cloth layer 11319, so that the support structure layer 11318 and the cloth layer 11319 are cured into one body; the first included angle a ranges from 15° to 60°; the second included angle β ranges from 15° to 60°; the cloth layer 11319 further comprises fourth fiber bodies 113194 which are interwoven with the first fiber bodies 113191, the second fiber bodies 113192 and the third fiber bodies 113193, and the fourth fiber bodies 113194 extend along the first direction X; the cloth layer 11319 comprises a first layer 113195 and a second layer 113196, the first layer 113195 is wrapped on the outer surface of the support structure layer 11318, and the second layer 113196 is attached to the cavity wall surface of the molding cavity 11311; the molding cavity 11311 has a first cavity wall and a second cavity wall, and at least one rib plate 11317 extends from the first cavity wall towards the second cavity wall.

[0147] According to some embodiments of the present application, with reference to Figures 5-8As shown, the application also provides an expanded beam manufacturing device 2000 for manufacturing the expanded beam 1131 in the above embodiment, the expanded beam manufacturing device 2000 comprises a first feeding assembly 2100, a second feeding assembly 2200, a preforming die 2300, a setting assembly 2400 and a traction forming assembly 2500, wherein the first feeding assembly 2100 is used for conveying the core wire 113181; the second feeding assembly 2200 is used for conveying the cloth layer 11319; the preforming die 2300 is located at the discharge end of the first feeding assembly 2100 and the second feeding assembly 2200, the preforming die 2300 is provided with a forming channel, the core wire 113181 and the cloth layer 11319 are connected in the forming channel, and the forming channel can gradually shrink the core wire 113181 and the cloth layer 11319 in the first direction X to be pre-shaped into a preset shape; the setting assembly 2400 is located at the discharge end of the preforming die 2300, the core wire 113181 and the cloth layer 11319 are connected in the setting assembly 2400, and the setting assembly 2400 is used for setting the core wire 113181 and the cloth layer 11319 into a setting shape; the traction forming assembly 2500 is located at the discharge end of the setting assembly 2400, and the traction forming assembly 2500 is used for stretching and forming the core wire 113181 and the cloth layer 11319.

[0148] For the preparation process of the expanded beam 1131, it needs to go through the manufacturing processes of feeding, preforming, setting and forming, therefore, the manufacturing device comprises the feeding assembly (including the first feeding assembly 2100 and the second feeding assembly 2200), the preforming die 2300, the setting assembly 2400 and the traction forming assembly 2500 arranged in sequence, so it can be known that the preforming die 2300 is located at the discharge end of the feeding assembly, the setting assembly 2400 is located at the discharge end of the preforming die 2300, and the traction forming assembly 2500 is located at the discharge end of the setting assembly 2400.

[0149] For the first feeding assembly 2100, the first feeding assembly 2100 is used for conveying the core wire 113181, which can also be called yarn, and the first feeding assembly 2100 can comprise a guide plate (or a guide board), the core wire 113181 is uniformly arranged on the guide plate, and the core wire 113181 can be guided by the guide plate to reduce the risk of knotting and entanglement in the conveying process.

[0150] For the second feeding assembly 2200, the second feeding assembly 2200 is used for conveying the cloth layer 11319, and the cloth layer 11319 can be wound and placed on the frame in the second feeding assembly 2200.

[0151] The preforming mold 2300 is used to arrange the core yarns 113181 and the cloth layers 11319, so that the core yarns 113181 and the cloth layers 11319 can be arranged in a preset shape similar or close to the cross-sectional profile shape of the expanded beam 1131, and the cross-sectional profile shape of the cured and shaped expanded beam 1131 can be defined as a shaped shape, and the preset shape refers to a shape or pattern close to or similar to the shaped shape, and the preset shape is the arrangement shape of the core yarns 113181 and the cloth layers 11319 in the cross-sectional direction perpendicular to the first direction X. By the preforming mold 2300, the arrangement position and shape of the core and the cloth layers 11319 are closer to the shaped shape, so that the core yarns 113181 and the cloth layers 11319 can be arranged in a preset shape before entering the shaping assembly 2400 for shaping, and the preforming mold 2300 makes the core yarns 113181 and the cloth layers 11319 first transitionally arranged to the shaped shape, so as to improve the shaping effect during later shaping.

[0152] Specifically, the preforming mold 2300 is provided with a forming channel, and the core yarns 113181 and the cloth layers 11319 are connected in the forming channel, and the forming channel is used to limit the arrangement position of the core yarns 113181 and the cloth layers 11319, and the cross-sectional profile shape of the forming channel is a preset shape, so that the core yarns 113181 and the cloth layers 11319 are limited to a preset shape after passing through the forming channel.

[0153] The forming channel can gradually reduce the arrangement of the core yarns 113181 and the cloth layers 11319 in the first direction X, and the forming channel makes the arrangement of the core yarns 113181 and the cloth layers 11319 closer to the shaped shape, and the forming channel plays a role of shaping transition. The outer contour size of the preset shape is larger than that of the shaped shape, and the preset shape can be considered as a transition shape to the shaped shape, and the size and precision are more extensive, which is a transition shape to form the shaped shape. Therefore, the core yarns 113181 and the cloth layers 11319 gradually transition from a larger contour size to a smaller contour size in the forming channel, and the gradual preforming is more conducive to reducing the knotting and related problems of the core yarns 113181, and improving the accuracy and quality of the later shaped shape. The forming channel is a channel or a combination of multiple channels, and in the cross section perpendicular to the first direction X, the multiple channels are arranged in a preset pattern, so that the core yarns 113181 and the cloth layers 11319 are arranged in a preset shape.

[0154] The shaping assembly 2400 is used for shaping and curing the core yarn 113181 and the cloth layer 11319, and has a shaping function, so that the core yarn 113181 and the cloth layer 11319 entering the shaping assembly 2400 can be arranged according to a shaping shape; the shaping shape is the arrangement shape of the core yarn 113181 and the cloth layer 11319 on a cross section perpendicular to the first direction X, and the core yarn 113181 and the cloth layer 11319 are integrated according to the shaping shape after being injected by the curing agent 11320.

[0155] Referring to Figure 8 As shown in the figure, the traction forming assembly 2500 is internally provided with a traction cavity 2510, and the expanded beam 1131 after curing and forming is inserted into the traction cavity 2510, and the traction forming assembly 2500 is used for traction forming the overall structure of the shaped core yarn 113181 and the cloth layer 11319, and the traction forming assembly 2500 can adopt a traction machine, which can adopt various forms, for example, reciprocating hydraulic or track type, the hydraulic traction machine has a large traction force, and the track type traction machine is stable during marching and has a large contact area with the core yarn 113181 and the cloth layer 11319.

[0156] In the embodiment, the manufacturing device preforms the core filaments 113181 and the cloth layer 11319 before shaping the core filaments 113181 and the cloth layer 11319, so that the core filaments 113181 and the cloth layer 11319 can be preformed into a preset shape close to the shaping shape through the preforming channel, and the core filaments 113181 and the cloth layer 11319 pass through the preforming arrangement of the preforming tool, and then transition from the preset shape to the shaping shape, so that the core filaments 113181 and the cloth layer 11319 are not prone to knotting and related problems in the process of transmission and shaping. In addition, the expanded beam 1131 prepared by the device is formed by curing the core filaments 113181 by the curing agent 11320, and the cloth layer 11319 is wrapped on the outer surface of the support structure layer 11318. The first fiber body 113191, the second fiber body 113192 and the third fiber body 113193 in the cloth layer 11319 are interwoven, so that the tensile strength of the cloth layer 11319 is enhanced. The core filaments 113181 are arranged along the first direction X, and the first fiber body 113191 in the cloth layer 11319 extends along the second direction Y perpendicular to the first direction X, so that the cloth layer 11319 enhances the anti-deformation ability of the expanded beam 1131 in the second direction Y, and the second fiber body 113192 and the third fiber body 113193 interwoven on both sides of the first fiber body 113191 further enhance the anti-deformation and anti-tensile properties of the expanded beam 1131. In addition, the curing agent 11320 is filled between the core filaments 113181, the bonding ability between the core filaments 113181 is enhanced, the curing agent 11320 plays a role in buffering the extrusion pressure, improves the anti-extrusion ability of the expanded beam 1131, so that the expanded beam 1131 is not prone to breakage, and the durability of the expanded beam 1131 is improved.

[0157] In some embodiments, referring to Figure 5 and Figure 6 As shown, the preforming mold 2300 includes a plurality of forming frames 2310 arranged in sequence along the first direction X, and each forming frame 2310 is provided with a forming sub-channel 2311. Along the first direction X, the outer contour size of each forming sub-channel 2311 shows a decreasing trend, so that the core filaments 113181 and the cloth layer 11319 passing through each forming sub-channel 2311 in sequence are gradually shaped into a preset shape.

[0158] Since the function of the preforming mold 2300 is to arrange the core filament 113181 and the fabric layer 11319 into a preset shape that is closer to the final shape, it can be understood that the core filament 113181 and the fabric layer 11319 can undergo multiple shape adjustments to finally arrange into the preset shape. Therefore, the preforming mold 2300 may include multiple forming frames 2310, each forming frame 2310 having a forming sub-channel 2311. As the core filament 113181 and the fabric layer 11319 pass through a forming frame 2310, the arrangement shape of the core filament 113181 and the fabric layer 11319 will move closer to the final shape. Therefore, it can be understood that along the first direction X, the outer contour dimension or outer shape dimension of the forming sub-channel 2311 on the forming frame 2310 tends to decrease, so as to facilitate the final molding into the preset shape. It can be seen that the function of each forming sub-channel 2311 is to gradually shrink the arrangement shape of the core wire 113181 and the fabric layer 11319 into the preset shape, which has the effect of gradual transition forming.

[0159] It should be noted that the forming sub-channel 2311 includes multiple channels, all of which extend along the first direction X. The multiple channels are arranged in an array within the cross-section to form a preset shape. For example, the multiple channels are arranged to form a preset shape, or to form a transition shape with a larger outer contour than the preset shape.

[0160] Multiple forming frames 2310 can be set independently and at intervals, making the overall use of the mold more flexible. Alternatively, multiple forming frames 2310 can be connected to form a whole, so as to facilitate the movement and transportation of the mold as a whole.

[0161] In this embodiment, the preforming mold 2300 adopts a combination of multiple forming frames 2310. The core wire 113181 and the fabric layer 11319 are shaped once by one forming frame 2310. After passing through multiple forming frames 2310, they are shaped into a preset shape, which helps to simplify the structure of the preforming mold 2300, reduce the weight of the mold, and improve the flexibility of mold use.

[0162] In some embodiments, refer to Figure 6 As shown, the forming channel has a channel axis corresponding to the center of the expansion beam 1131. The forming channel includes a first sub-channel 23111 and a second sub-channel 23112. The first sub-channel 23111 is used to thread the core wire 113181, and the second sub-channel 23112 is used to thread the fabric layer 11319. The second sub-channel 23112 is located on the side of the first sub-channel 23111 away from the channel axis.

[0163] Specifically, the channel axis can be considered as the central axis of the expansion beam 1131. Since the fabric layer 11319 wraps around the additional surface of the support structure layer 11318, it is necessary to position the fabric layer 11319 on the side of the core filament 113181 away from the channel axis. Correspondingly, the core filament 113181 and the fabric layer 11319 are arranged at intervals, with the core filament 113181 passing through the first sub-channel 23111 and the fabric layer 11319 passing through the second sub-channel 23112. The cross-sectional profiles of the first sub-channel 23111 and the second sub-channel 23112 are combined and arranged in a shape close to a fixed shape.

[0164] In the case of multiple forming frames 2310, each forming sub-channel 2311 includes a first sub-channel 23111 and a second sub-channel 23112 to distinguish and classify the channels for the transmission of the core filament 113181 and the fabric layer 11319. It should be noted that the first sub-channel 23111 can be formed by combining one or more channels, and similarly, the second sub-channel 23112 can also be formed by combining one or more channels, with multiple channels arranged in an array in the cross-section to form a preset shape.

[0165] In this embodiment, the first sub-channel 23111 and the second sub-channel 23112 are used to separately transport and pre-shape the core filament 113181 and the fabric layer 11319, respectively. This makes it less likely for the core filament 113181 to become knotted or tangled during the transmission and pre-shaping process. In addition, it also makes it less likely for the fabric layer 11319 to become knotted or tangled during the transmission and pre-shaping process. Transporting the core filament 113181 and the fabric layer 11319 separately reduces the disordered arrangement of the core filament 113181 and the fabric layer 11319, which is beneficial to improving the forming quality of the expansion beam 1131.

[0166] In some embodiments, refer to Figure 5 and Figure 7 As shown, the shaping component 2400 includes a third feeding component 2420 and a shaping mold 2410. The core filament 113181 and the fabric layer 11319 are inserted into the shaping mold 2410. The third feeding component 2420 is connected to the shaping mold 2410. The third feeding component 2420 can deliver curing agent 11320 into the shaping mold 2410 so that the core filament 113181 and the fabric layer 11319 are cured and formed.

[0167] Specifically, the third feeding assembly 2420 is used for containing the curing agent 11320, the sizing mold 2410 has a sizing cavity 2440, and the third feeding assembly 2420 is connected to the sizing cavity 2440 through the pouring channel 2430, so that the curing agent 11320 can enter the sizing cavity 2440, and the core yarn 113181, the cloth layer 11319 and the curing agent 11320 are located in the sizing cavity 2440, and the core yarn 113181 and the cloth layer 11319 are cured into an integrated structure after the curing agent 11320 is cooled and cured.

[0168] The core yarn 113181 and the cloth layer 11319 are arranged in the sizing cavity 2440 of the sizing mold 2410, and the sizing mold 2410 is used for arranging the core yarn 113181 and the cloth layer 11319 into a sizing shape, that is, the cross-sectional shape of the core yarn 113181 and the cloth layer 11319 is the sizing shape.

[0169] In this embodiment, the sizing assembly 2400 is used for curing and sizing the core yarn 113181 and the cloth layer 11319, and the cross-sectional shape of the core yarn 113181 and the cloth layer 11319 is arranged into a sizing shape, that is, the sizing shape is the cross-sectional profile shape of the formed expansion beam 1131. The third feeding assembly 2420 delivers the curing agent 11320 into the sizing mold 2410 during the sizing process, so as to facilitate the sizing of the core yarn 113181 and the cloth layer 11319, and the overall structure of the sizing assembly 2400 is more compact and convenient to use.

[0170] According to some embodiments of the present application, the present application also provides a manufacturing method of the expansion beam 1131, which is used for manufacturing the expansion beam 1131 in the above-mentioned embodiments, and the method comprises the following steps:

[0171] The material pre-preparation step specifically comprises pre-preparing the core yarn 113181 and the cloth layer 11319.

[0172] The core yarn 113181 can be glass yarn or glass fiber, which is guided and delivered through a yarn guide plate. The cloth layer 11319 can be wound and installed on a frame.

[0173] The pre-forming step specifically comprises passing the core yarn 113181 and the cloth layer 11319 through the pre-forming mold 2300, so as to form a tapering trend of the core yarn 113181 and the cloth layer 11319 along the first direction X.

[0174] The preforming process of the expansion beam 1131 adopts a preforming die 2300, and the preforming refers to arranging the core wires 113181 and the cloth layers 11319 in a preset shape similar to or close to the cross-sectional profile shape of the expansion beam 1131. The tapering trend refers to the process of the core wires 113181 and the cloth layers 11319 transitioning from a state of relatively large outer contour size to the preset shape close to the final shape, that is, the core wires 113181 and the cloth layers 11319 taper and transition from a large contour size to a small contour size in the forming channel in the preforming die 2300, and the preforming is achieved in a progressive manner. The specific principle and the preforming process can refer to the description in the above-described embodiments of the expansion beam manufacturing device 2000, which will not be described here again.

[0175] The final shape refers to the shape of the expansion beam 1131 after the core wires 113181 and the cloth layers 11319 are cured and shaped by the curing agent 11320 in the final shape assembly 2400.

[0176] The purpose of the final shape is to enable the core wires 113181 and the cloth layers 11319 to be arranged in the final shape assembly 2400 first, and to be shaped and cured by the curing agent 11320.

[0177] The traction forming step specifically includes stretching and forming the core wires 113181 and the cloth layers 11319 by the traction forming assembly 2500.

[0178] The core wires 113181 and the cloth layers 11319 are cured and shaped with the curing agent 11320 in the final shape step, and the entire shaped expansion beam 1131 enters the traction forming assembly 2500, and the stretching force is applied to the cured and shaped expansion beam 1131 to deform at a certain speed, so as to achieve the required shape and size.

[0179] In this embodiment, the core wires 113181 and the cloth layers 11319 are preformed between the final shape of the core wires 113181 and the cloth layers 11319, so that the core wires 113181 and the cloth layers 11319 can be preformed into a preset shape close to the final shape through the preforming channel, and the core wires 113181 and the cloth layers 11319 are arranged by the preforming tool from the preset shape to the final shape, so that the core wires 113181 and the cloth layers 11319 are not easy to knot and cause problems in the process of transmission and final shape. In addition, in this method, the core wires 113181 are wrapped by the cloth layers 11319 and the curing agent 11320 is injected for curing and final shape, so that the expansion beam 1131 has the functions of absorbing extrusion force and relieving stress, enhances the anti-deformation ability of the expansion beam 1131, effectively reduces the damage to the core wires 113181 and the fiber structure, and makes the expansion beam 1131 not easy to be damaged.

[0180] In some embodiments, referring to Figures 3-5 As shown in the step of passing the core yarn 113181 and the cloth layer 11319 through the preforming die 2300, the preforming die 2300 passes the core yarn 113181 through the first sub-channel 23111 and passes the cloth layer 11319 through the second sub-channel 23112, and the first sub-channel 23111 and the second sub-channel 23112 are arranged in parallel and spaced apart.

[0181] Specifically, the first sub-channel 23111 and the second sub-channel 23112 are separately formed in the preforming die 2300, so that the core yarn 113181 is threaded in the first sub-channel 23111 and the cloth layer 11319 is threaded in the second sub-channel 23112, thereby achieving the zoned arrangement of the core yarn 113181 and the cloth layer 11319, and the fiber in the core yarn 113181 and the fiber in the cloth layer 11319 do not mix, so that the core yarn 113181 and the fiber in the cloth layer 11319 are not prone to knotting and entanglement, thereby facilitating the flatness of the arrangement between the core yarn 113181 and the cloth layer 11319 and improving the quality of the expanded beam 1131.

[0182] In this embodiment, the preforming die 2300 can arrange and transport the core yarn 113181 and the cloth layer 11319, so that the core yarn 113181 and the cloth layer 11319 are not prone to mutual friction, and the core yarn 113181 and the fiber in the cloth layer 11319 are not prone to knotting and entanglement, thereby improving the quality of the expanded beam 1131.

[0183] In some embodiments, referring to Figures 3-5 As shown in the step of passing the core yarn 113181 and the cloth layer 11319 through the preforming die 2300, the preforming die 2300 includes a plurality of forming frames 2310 arranged in sequence and spaced apart along the first direction X, each forming frame 2310 is provided with a forming sub-channel 2311, and along the first direction X, the outer contour size of each forming sub-channel 2311 gradually decreases, so that the core yarn 113181 and the cloth layer 11319 gradually shrink to a preset shape after passing through each forming sub-channel 2311 in sequence.

[0184] It can be seen that the preforming die 2300 is used to arrange the core yarn 113181 and the cloth layer 11319 into a preset shape closer to the final shape, and each forming sub-channel 2311 is used to gradually shrink the arrangement shape of the core yarn 113181 and the cloth layer 11319 to the preset shape, thereby achieving a gradual transition forming effect. For details, please refer to the description in the above embodiment of the expanded beam manufacturing device 2000.

[0185] In this embodiment, the preforming mold 2300 adopts a combination of multiple forming frames 2310. The core wire 113181 and the fabric layer 11319 are shaped once by one forming frame 2310. After passing through multiple forming frames 2310, a preset shape is formed, which helps to simplify the structure of the preforming mold 2300, reduce the weight of the mold, and improve the flexibility of mold use.

[0186] According to some embodiments of this application, refer to Figure 10 and Figure 11 As shown, this application also provides a battery 1100, which includes a battery cell assembly 1120, a housing 1110, and an expansion beam 1131 as described in the above embodiments. The housing 1110 has an accommodating space 1113, in which the battery cell assembly 1120 and the expansion beam 1131 are both housed. The expansion beam 1131 is connected to the housing 1110.

[0187] Specifically, the expansion beam 1131 is connected to the housing 1110 and is used to abut against the battery cell assembly 1120. When the battery cell assembly 1120 is heated and expands, the battery cell assembly 1120 squeezes the expansion beam 1131, and the expansion beam 1131 absorbs and disperses stress through its own deformation.

[0188] The expansion beam 1131 is a columnar or cylindrical structure extending along a first direction X, which is the length direction (or extension length direction) of the expansion beam 1131. Both the expansion beam 1131 and the battery cell assembly 1120 are located within the accommodating space 1113. At least some of the battery cells in the battery cell assembly 1120 are disposed opposite to the outer surface of the expansion beam 1131. The surface of the battery cell assembly 1120 and the outer surface of the expansion beam 1131 can either abut against each other or form a small deformation gap to accommodate the expansion of the battery cell assembly 1120.

[0189] The expansion beam 1131 is internally formed with a cavity 11311 which can pass through the entire length direction of the expansion beam 1131, and the cavity 11311 can deform the expansion beam 1131 when the expansion beam 1131 is subjected to the extrusion force, so as to absorb and disperse the stress and absorb the expansion deformation of the battery monomer assembly 1120. The expansion beam 1131 can be made of a composite material, which can include a fiber material, a resin material, etc. The resin material matrix is responsible for transmitting stress and providing environmental adaptability and durability; the fiber material can use unidirectional continuous fibers, and the resin material can use polyurethane, epoxy, vinyl, etc. The fiber material is mainly responsible for increasing the strength and stiffness of the material, and can also bear a certain load. In addition, the composite material can also include fillers, such as glass powder, talc powder, carbon black, etc., which can improve the performance of the composite material, such as reducing cost, improving wear resistance, or improving electromagnetic performance, etc. The composite material can also include functional additives, such as curing agents, catalysts, flame retardants, ultraviolet stabilizers, etc., which are chemical substances for improving material performance. For example, the expansion beam 1131 includes a core wire 113181 made of glass fiber material and a cloth layer 11319 made of carbon fiber material.

[0190] The box body 1110 can include side wall bodies, top wall bodies, and bottom wall bodies, and the two ends of the expansion beam 1131 can extend to the side wall bodies of the box body 1110. For example, when the box body 1110 is externally cuboid-shaped, the box body 1110 has four side wall bodies, and the expansion beam 1131 can be arranged parallel to one side wall body of the box body 1110. The expansion beam 1131 can be provided with one or more, and multiple expansion beams 1131 can be arranged in parallel and spaced apart.

[0191] In this embodiment, the expansion beam 1131 is arranged in the box body 1110, and the battery monomer assembly 1120 is located on one side of the expansion beam 1131, so that when the battery monomer assembly 1120 expands due to heat, the expansion beam 1131 can absorb and disperse the extrusion force. The expansion beam 1131 is wrapped with the cloth layer 11319 and cured by the curing agent 11320, thereby enhancing the anti-deformation ability and anti-pulling performance of the expansion beam 1131, so that the expansion beam 1131 is not easy to break, and the durability of the expansion beam 1131 is improved.

[0192] Since the expansion beam 1131 has a certain extension length, the expansion beam 1131 will be subjected to the extrusion force in the entire extension length direction of the expansion beam 1131, so the expansion beam 1131 is prone to bending, thereby affecting the stability of the expansion beam 1131 on the box body 1110. For example, the expansion beam 1131 bends in the extension length direction, and the bent expansion beam 1131 is easy to produce stress and interference problems to the box body 1110, which causes the deformation of the box body 1110 and affects the appearance and use of the battery 1100.

[0193] Therefore, in some embodiments, referring to Figures 11-13 As shown, the battery 1100 further comprises a support 1132 accommodated in the accommodating space 1113, the expansion beam 1131 and the support 1132 are both arranged along the first direction X, the expansion beam 1131 has a first side wall body 11312 on one side along the first direction X, the support 1132 is arranged along the first direction X and connected with the first side wall body 11312, the support 1132 is connected to the box body 1110, and the support 1132 is arranged opposite to the battery monomer assembly 1120.

[0194] Specifically, on the expansion beam 1131, first side wall bodies 11312 can be respectively formed on both sides along the first direction X, the first side wall bodies 11312 are wall bodies opposite to the battery monomer assembly 1120, and the first side wall bodies 11312 can be flat or bent.

[0195] The support 1132 is connected to the box body 1110, and the support 1132 and the box body 1110 can be connected by welding or fasteners, and the support 1132 is further connected to the first side wall body 11312 of the expansion beam 1131, that is, the support 1132 is connected between the box body 1110 and the expansion beam 1131.

[0196] The support 1132 is arranged along the first direction X, and the extension length of the support 1132 is less than or equal to the extension length of the expansion beam 1131, the extension length of the support 1132 is defined as L1, the extension length of the expansion beam 1131 is defined as L2, and L1≤L2, for example, L1=1 / 3L2, or L1=1 / 2L2, or L1=2 / 3L2, or L1=L2. When the extension length of the support 1132 is less than the extension length of the expansion beam 1131, the support 1132 can be located in the middle region of the extension length direction of the expansion beam 1131.

[0197] Since the support 1132 is connected with the first side wall body 11312 of the expansion beam 1131, it can be known that the support 1132 is arranged opposite to the battery monomer assembly 1120, that is, the support 1132 and the battery monomer assembly 1120 are arranged on both sides of the expansion beam 1131. When the battery monomer assembly 1120 expands and extrudes the expansion beam 1131, the support 1132 provides a support force opposite to the extrusion force to the expansion beam 1131, so as to form sufficient support to the expansion beam 1131, so that the expansion beam 1131 is not easy to bend in the extension length direction thereof.

[0198] The expansion beam 1131 and the support 1132 can be combined to form a structural beam assembly 1130, and the structural beam assembly 1130 can be provided in plurality, and the plurality of structural beam assemblies 1130 can be arranged at intervals.

[0199] In this embodiment, the expansion beam 1131 and the support 1132 are arranged in the box body 1110, and the support 1132 and the battery monomer assembly 1120 are arranged on the two sides of the expansion beam 1131 respectively. When the battery monomer assembly 1120 expands due to heat, the expansion beam 1131 can absorb and disperse the extrusion force, and the support 1132 can form a support force opposite to the extrusion force on the expansion beam 1131, thereby improving the support of the expansion beam 1131, reducing the bending deformation of the expansion beam 1131 due to the extrusion force, and improving the stability of the connection between the expansion beam 1131 and the box body 1110.

[0200] In some embodiments, referring to FIG. 1, the box body 1110 can include a first box wall body 1114, and the support 1132 can include a first connecting portion 11321 and a protruding portion 11322, which are arranged along a first direction X and are connected to the first box wall body 1114. Figures 11-13 As shown in FIG. 1, the inside of the cavity 11311 can be provided with a plurality of rib plates 11317 (or rib plates), the edges of the rib plates 11317 are connected to the cavity wall of the cavity 11311, and the plurality of rib plates 11317 are arranged at intervals in the cavity 11311.

[0201] In some embodiments, referring to FIG. 1, the box body 1110 can include a first box wall body 1114, and the support 1132 can include a first connecting portion 11321 and a protruding portion 11322, which are arranged along a first direction X and are connected to the first box wall body 1114. Figures 11-13 As shown in FIG. 1, the expansion beam 1131 also has a second side wall body 11314, and the first side wall body 11312 and the second side wall body 11314 are arranged on the two sides of the expansion beam 1131 along the preset direction X. The second side wall body 11314 is used to be opposite or abut to the battery monomer assembly 1120, and can be in a flat plate shape or a bent shape, etc. The first side wall body 11312 and the second side wall body 11314 are arranged opposite to each other.

[0202] In some embodiments, referring to FIG. 1, the box body 1110 can include a first box wall body 1114, and the support 1132 can include a first connecting portion 11321 and a protruding portion 11322, which are arranged along a first direction X and are connected to the first box wall body 1114. Figures 11-13 As shown in FIG. 1, the box body 1110 includes a first box wall body 1114, and the support 1132 includes a first connecting portion 11321 and a protruding portion 11322, which are arranged along a first direction X and are connected to the first box wall body 1114. The first direction X is parallel to the first box wall body 1114. The first connecting portion 11321 is connected to the first box wall body 1114. The protruding portion 11322 is connected to the first connecting portion 11321, and the protruding portion 11322 protrudes from the first connecting portion 11321 in a direction away from the first box wall body 1114.

[0203] Since the box body 1110 can include a side wall body, a top wall body and a bottom wall body, the first box wall body 1114 can refer to any one of the side wall body, the top wall body or the bottom wall body. In this example, the first box wall body 1114 is taken as an example of a side wall body of the box body 1110, and the wall surface (inner wall surface) of the first box wall body 1114 on the side of the containing space 1113 is taken as a plane. Of course, the wall surface of the first box wall body 1114 can also be a curved surface.

[0204] The first connecting portion 11321 of the support 1132 is used to be fixedly or detachably connected with the first box wall body 1114, for example, the first connecting portion 11321 is connected with the first box wall body 1114 by welding, fasteners or the like. The first connecting portion 11321 can adopt a plate structure, a shell structure or the like. The first connecting portion 11321 is arranged to extend along the first direction X, for example, the first connecting portion 11321 is in a plate shape, the plate surface of the first connecting portion 11321 is arranged to be attached to the surface of the first box wall body 1114, and the first connecting portion 11321 is connected and fixed with the first box wall body 1114 by spot welding.

[0205] The protruding portion 11322 of the support 1132 is connected with the first connecting portion 11321. The protruding portion 11322 can be an integral structure with the first connecting portion 11321, or the protruding portion 11322 can be fixedly or detachably connected with the first connecting portion 11321. The protruding portion 11322 can adopt a plate structure, a frame structure, a solid structure or the like. The protruding portion 11322 is protruded on the first connecting portion 11321, and the protruding portion 11322 extends outwardly from the position connected with the first connecting portion 11321 to a direction away from the first connecting portion 11321 and the first box wall body 1114, so that the protruding portion 11322 forms a certain contact area when abutting against the first side wall body 11312 of the expansion beam 1131, thereby increasing the contact area and improving the bearing capacity of the support 1132. The protruding portion 11322 is also arranged to extend along the first direction X, so that in the first direction X, the protruding portion 11322 forms a contact area with the surface of the first side wall body 11312 of the expansion beam 1131, and the contact area between the protruding portion 11322 and the first side wall body 11312 is further increased, thereby further improving the bearing capacity of the support 1132.

[0206] In this embodiment, the support 1132 is connected with the box body 1110 through the first connecting portion 11321, and a certain contact area is formed between the protruding portion 11322 and the expansion beam 1131, thereby improving the supporting effect of the support 1132 on the expansion beam 1131 and improving the supporting stability.

[0207] In some embodiments, with reference to Figure 13 and Figure 14As shown, the protruding portion 11322 includes a support arm body 113221 which is outwardly bent towards the direction away from the first cabinet wall body 1114, the support arm body 113221 is arranged along the first direction X, and a support cavity 1134 is formed between the support arm body 113221 and the first cabinet wall body 1114, and the support arm body 113221 is connected with the expansion beam 1131. The first connecting portion 11321 is located on the side of the support arm body 113221 away from the expansion beam 1131 and is connected with the support arm body 113221.

[0208] Specifically, the protruding portion 11322 includes a support arm body 113221 which is arranged along the first direction X, and then along the first direction X, the first connecting portion 11321 and the expansion beam 1131 are respectively located on both sides of the support arm body 113221. The support arm body 113221 can be formed by bending a plate body, and the support arm body 113221 is bent to form a hollow groove. Since the support arm body 113221 is arranged along the first direction X, it can be seen that the hollow groove is a strip-shaped hollow groove extending along the first direction X. The first connecting portion 11321 is connected with the first cabinet wall body 1114, so that the first cabinet wall body 1114 covers the groove opening of the hollow groove, and then the first cabinet wall body 1114 and the support arm body 113221 together form the support cavity 1134, which can deform the support arm body 113221. The support arm body 113221 is connected with the expansion beam 1131 in a manner which can include welding, fastener connection, etc. The support arm body 113221 can absorb and disperse the force from the expansion beam 1131, thereby facilitating the reduction of stress concentration between the expansion beam 1131 and the support arm body 113221, and improving the support stability of the support arm body 113221 to the expansion beam 1131.

[0209] In this embodiment, the protruding portion 11322 is prepared by adopting the outwardly bent support arm body 113221, which together with the first cabinet wall body 1114 forms the support cavity 1134, and the support cavity 1134 can absorb and disperse stress, thereby improving the support effect of the support arm body 113221 to the expansion beam 1131, reducing stress concentration, and improving support stability.

[0210] In some embodiments, referring to Figure 13 and Figure 14 As shown, the support arm body 113221 includes a first sub-wall body 113222 which is arranged along the first direction X, and the first sub-wall body 113222 is arranged in abutment with the first side wall body 11312.

[0211] The first sub-wall body 113222 is part of the support arm body 113221, and the first sub-wall body 113222 can be made of a plate body structure. The first sub-wall body 113222 can be arranged opposite to the first side wall body 11312. The surface of the first sub-wall body 113222 opposite to the first side wall body 11312 can be parallel to the surface of the first side wall body 11312 opposite to the first sub-wall body 113222, so that the first sub-wall body 113222 can be arranged in close contact with the first side wall body 11312.

[0212] The first sub-wall body 113222 extends along the first direction X. The extension length of the first sub-wall body 113222 can be less than or equal to the extension length of the first side wall body 11312. The greater the extension length of the first sub-wall body 113222, the greater the connection area between the first sub-wall body 113222 and the first side wall body 11312, and the greater the support and bearing capacity of the first sub-wall body 113222 to the expansion beam 1131.

[0213] In this embodiment, the first sub-wall body 113222 arranged in close contact with the first side wall body 11312 can increase the support area between the support arm body 113221 and the expansion beam 1131, thereby improving the support capacity of the support arm body 113221 to the expansion beam 1131 and improving the support stability.

[0214] In some embodiments, referring to Figure 13 As shown, the battery device 1100 (or the structural beam assembly 1130) further includes a bonding structure 1135 connected between the first sub-wall body 113222 and the first side wall body 11312.

[0215] The bonding structure 1135 can be a liquid adhesive that can be cured or a solid adhesive layer. The bonding structure 1135 can be continuously arranged along the first direction X, or the bonding structure 1135 can be discontinuously arranged along the first direction X.

[0216] In this embodiment, the bonding structure 1135 can bond and fix the support arm body 113221 to the expansion beam 1131, thereby enhancing the connection strength between the support arm body 113221 and the expansion beam 1131, and improving the support strength and stability of the expansion beam 1131.

[0217] In some embodiments, referring to Figure 13 and Figure 14As shown, the support arm body 113221 further comprises a second sub-wall body 113223 and a third wall body 113224, both of which are arranged along the first direction X, the second sub-wall body 113223 is parallel to the first box wall body 1114 and connected to the first sub-wall body 113222, the third wall body 113224 is connected between the second sub-wall body 113223 and the first connecting part 11321, and the first sub-wall body 113222, the second sub-wall body 113223, the third wall body 113224 and the first box wall body 1114 together form the support cavity 1134.

[0218] Specifically, the second sub-wall body 113223 and the third wall body 113224 can be made of a plate structure, the first sub-wall body 113222, the second sub-wall body 113223 and the third wall body 113224 are arranged along the first direction X, the second sub-wall body 113223 can be arranged parallel to the first box wall body 1114, the first sub-wall body 113222, the second sub-wall body 113223 and the third wall body 113224 can be integrally formed, and the support arm body 113221 can be made by bending or stamping, so that the support arm body 113221 abuts against the first box wall body 1114, and the first box wall body 1114, the first sub-wall body 113222, the second sub-wall body 113223 and the second sub-wall body 113223 together form the support cavity 1134.

[0219] For the overall structure of the support 1132, the first connecting part 11321, the third wall body 113224, the second sub-wall body 113223 and the first sub-wall body 113222 are sequentially connected, the first connecting part 11321 is connected to the first box wall body 1114, the support arm body 113221 formed by the third wall body 113224, the second sub-wall body 113223 and the first sub-wall body 113222 is buckled on the first box wall body 1114, the first sub-wall body 113222 abuts against the first side wall body 11312 on the expansion beam 1131, and the first sub-wall body 113222 and the first side wall body 11312 are fixedly connected by the adhesive structure 1135. It can be seen that the support 1132 is fixed on the box body 1110, the support 1132 can support the expansion beam 1131 at the side of the expansion beam 1131, the support force of the support 1132 on the expansion beam 1131 is opposite to the extrusion force of the battery monomer assembly 1120 on the expansion beam 1131, so that the support 1132 can enhance the carrying capacity of the expansion beam 1131, the support 1132 is arranged along the length direction of the expansion beam 1131, which is beneficial to reducing the bending resistance of the expansion beam 1131 and improving the structural stability of the expansion beam 1131.

[0220] In the embodiment, the first sub-wall body 113222, the second sub-wall body 113223, the third wall body 113224 and the first box wall body 1114 jointly enclose the support cavity 1134, so that the support arm body 113221 can be integrally prepared by using a profile structure, the overall structure of the support arm body 113221 is simple and convenient to manufacture, which is beneficial to reduce the overall weight and facilitate the lightweight of the battery 1100.

[0221] In some embodiments, as shown in Figure 12 , Figure 13 and Figure 14 , the support member 1132 further includes a second connecting portion 11323 extending along the first direction X, the second connecting portion 11323 and the first connecting portion 11321 are respectively located on both sides of the protruding portion 11322, and the second connecting portion 11323 is connected to the protruding portion 11322, the second connecting portion 11323 is connected to the first box wall body 1114, and the expansion beam 1131 abuts on the second connecting portion 11323.

[0222] In the support member 1132, the second connecting portion 11323 is connected to the first box wall body 1114 of the box body 1110, and the second connecting portion 11323 and the first box wall body 1114 can be connected in a fixed or detachable manner, for example, the second connecting portion 11323 and the first box wall body 1114 are connected by welding or using fasteners.

[0223] The second connecting portion 11323 is connected to the protruding portion 11322, specifically, the second connecting portion 11323 is connected to the third wall body 113224 in the support arm body 113221, the first connecting portion 11321 and the second connecting portion 11323 are respectively located on both sides of the protruding portion 11322, when the protruding portion 11322 abuts on the expansion beam 1131, the expansion beam 1131 can abut on the second connecting portion 11323, that is, the second connecting portion 11323 is located between the expansion beam 1131 and the first box wall body 1114, so that the second connecting portion 11323 has a supporting effect on the expansion beam 1131.

[0224] In the embodiment, by providing the second connecting portion 11323, the second connecting portion 11323 is connected to the first box wall body 1114, thereby enhancing the connection strength between the support member 1132 and the box body 1110, further improving the supporting capacity of the support member 1132 on the expansion beam 1131, and improving the reliability of the connection between the expansion beam 1131 and the box body 1110.

[0225] In some embodiments, as shown in Figure 13 and Figure 14 , the second connecting portion 11323 is plate-shaped, and the second connecting portion 11323 is arranged in abutment with and connected to the first box wall body 1114.

[0226] Specifically, the second connecting part 11323 is made of a plate structure. The second connecting part 11323 is flat and parallel to the first box wall 1114. The plate surface of the second connecting part 11323 is opposite to and in contact with the surface of the first box wall 1114. The expansion beam 1131 abuts against the surface of the second connecting part 11323 that is opposite to the first box wall 1114.

[0227] In this embodiment, the use of a plate-shaped second connecting part 11323 can increase the connection area between the support member 1132 and the first box wall 1114, enhance the connection strength between the support member 1132 and the box 1110, and can also support the expansion beam 1131.

[0228] In some embodiments, the second connecting portion 11323 is welded and fixed to the first box wall 1114.

[0229] Since the second connecting part 11323 is plate-shaped and fits snugly against the first box wall 1114, the second connecting part 11323 forms a large contact area with the first box wall 1114 in the first direction X. The second connecting part 11323 and the first box wall 1114 are welded together along the first direction X. Spot welding can be used to increase the number of fixed connection positions between the second connecting part 11323 and the first box wall 1114, increase the connection area, and thus help improve the connection strength.

[0230] In this embodiment, welding is used to enhance the firmness of the connection between the second connecting part 11323 and the housing 1110, and to facilitate operation without the need to add other parts, which helps to simplify the structure and reduce production costs.

[0231] In some embodiments, refer to Figure 13 and Figure 14 As shown, the first connecting part 11321 is plate-shaped, and the first connecting part 11321 is fitted and connected to the first box wall 1114.

[0232] Specifically, the first connecting part 11321 is made of a plate structure. The first connecting part 11321 is flat and parallel to the first box wall 1114. The plate surface of the first connecting part 11321 is opposite to and attached to the surface of the first box wall 1114. Both the first connecting part 11321 and the second connecting part 11323 are attached to and connected to the first box 1110.

[0233] Therefore, the first connecting portion 11321, the third wall body 113224, the second sub-wall body 113223, the first sub-wall body 113222, and the second connecting portion 11323 can all be in a plate shape, so that the entire support piece 1132 can be stamped or bent to form a plate structure, and the support piece 1132 can be prepared in a profile structure, thereby facilitating manufacturing and reducing production costs.

[0234] In this embodiment, the plate-shaped first connecting portion 11321 can increase the connection area between the support piece 1132 and the first box wall body 1114, and enhance the connection strength between the support piece 1132 and the box body 1110.

[0235] In some embodiments, the first connecting portion 11321 is welded and fixed with the first box wall body 1114.

[0236] Since the first connecting portion 11321 is in a plate shape and is arranged in close contact with the first box wall body 1114, a large contact area is formed between the first connecting portion 11321 and the first box wall body 1114 in the first direction X. In the first direction X, the first connecting portion 11321 and the first box wall body 1114 are welded, and the welding method can be spot welding, thereby increasing the fixed connection position between the first connecting portion 11321 and the first box wall body 1114 and increasing the connection area, thereby facilitating the improvement of the connection strength.

[0237] In this embodiment, the welding method is used to enhance the connection strength of the first connecting portion 11321 and the box body 1110, and is convenient to operate without the need to increase other components, thereby facilitating the simplification of the structure and the reduction of production costs.

[0238] In some embodiments, as shown in Figure 12 , Figure 13 and Figure 16 , the battery device 1100 (or the structural beam assembly 1130) further includes a first locking assembly 1133 connected with the protruding portion 11322 and the expansion beam 1131, respectively.

[0239] The first locking assembly 1133 is connected between the protruding portion 11322 and the expansion beam 1131 of the support piece 1132, so as to connect and fix the protruding portion 11322 and the expansion beam 1131. The first locking assembly 1133 can be a threaded fastener, a buckle assembly, a plug-in assembly, etc. For example, the first locking assembly 1133 can be a bolt assembly.

[0240] The first locking assembly 1133 can be connected with the first sub-wall body 113222 or the second sub-wall body 113223 or the third wall body 113224 of the protruding portion 11322, as shown in Figure 5As shown, the first locking assembly 1133 is connected with the second sub-wall body 113223.

[0241] In this embodiment, the first locking assembly 1133 is additionally arranged to further connect and fix the protruding part 11322 and the expansion beam 1131, thereby improving the connection firmness between the support part 1132 and the expansion beam 1131, and facilitating to improve the support stability of the support part 1132 to the expansion beam 1131.

[0242] In some embodiments, referring to Figure 13 and Figure 16 As shown, the first side wall body 11312 is provided with a locking arm 11316 protruding therefrom; the locking arm 11316 is arranged in abutment with the second sub-wall body 113223, and the first locking assembly 1133 is connected with the locking arm 11316 and the second sub-wall body 113223, respectively.

[0243] Specifically, the expansion beam 1131 is a frame-shaped structure beam, and a cavity 11311 is formed in the middle part of the expansion beam 1131. The expansion beam 1131 includes a plurality of side wall bodies connected in sequence and arranged in a ring shape. For example, the expansion beam 1131 includes four side wall bodies, i.e., the first side wall body 11312, the third side wall body 11313, the second side wall body 11314, and the fourth side wall body 11315 connected in sequence. The first side wall body 11312 is arranged opposite to the second side wall body 11314, and the third side wall body 11313 is arranged opposite to the fourth side wall body 11315. When the expansion beam 1131 is placed vertically, the first side wall body 11312 and the second side wall body 11314 can be understood as side walls, the third side wall body 11313 can be understood as a lower wall (or a bottom wall), and the fourth side wall body 11315 can be understood as an upper wall (or a top wall), so that the third side wall body 11313 abuts against the second connecting part 11323.

[0244] Among them, the cavity 11311 of the expansion beam 1131 is provided with a plurality of rib plates 11317, and at least one rib plate 11317 among the plurality of rib plates 11317 is located at a back side of the locking arm 11316. The back side refers to a direction in which the rib plate 11317 extends and is opposite to the direction in which the locking arm 11316 extends. In this way, the rib plate 11317 can alleviate and disperse the stress at the position of the locking arm 11316, thereby improving the support effect of the locking arm 11316.

[0245] The locking arm 11316 can be fixedly or detachably connected to the first side wall 11312, or the locking arm 11316 can be integrally formed with the first side wall 11312. Since the support member 1132 abuts against the first side wall 11312, the first locking assembly 1133 can be connected between the locking arm 11316 and the second sub-wall 113223. For example, the locking arm 11316 is plate-shaped, and the locking arm 11316 and the second sub-wall 113223 of the protrusion 11322 are oppositely arranged and the locking arm 11316 and the second sub-wall 113223 are in contact. The first locking assembly 1133 can be a bolt assembly, which is connected between the locking arm 11316 and the second sub-wall 113223 to connect and fix the locking arm 11316 and the second sub-wall 113223.

[0246] In this embodiment, by providing a locking arm 11316 on the first side wall 11312, the first locking assembly 1133 is connected between the locking arm 11316 and the second sub-wall 113223, which facilitates installation and disassembly, prevents damage to the main structure of the expansion beam 1131, and protects the expansion beam 1131.

[0247] In some embodiments, refer to Figure 19 As shown, the battery 1100 includes at least two spaced-apart structural beam assemblies 1130, each of which includes an expansion beam 1131 and a support member 1132. Each expansion beam 1131 is connected to the first box wall 1114 of the box body 1110. The battery 1100 also includes at least one fixing strap 1140, the two ends of which are respectively connected to the ends of the expansion beams 1131 in any two structural beam assemblies 1130 that are away from the first box wall 1114.

[0248] Since the box body 1110 may include side walls, top walls and bottom walls, and the two ends of the expansion beam 1131 may extend to the side walls of the box body 1110, in this example, the first box wall 1114 is taken as the bottom wall and the expansion beam 1131 is connected to the first box wall 1114 through the support member 1132.

[0249] The expansion beam 1131 can extend close to the side wall of the housing 1110, so that the battery cell assembly 1120 is housed within the housing space 1113 of the housing 1110, allowing the support member 1132 to be located on one side of the expansion beam 1131. Since the housing 1110 includes multiple side walls, multiple structural beam assemblies 1130 are provided, so that a structural beam assembly 1130 can be correspondingly provided on the side of each of the multiple side walls.

[0250] The fixing strap 1140 shell adopts a sheet-like structure or a linear structure, etc. The fixing strap 1140 is used to connect any two structural beam components 1130, so that the two ends of the fixing strap 1140 are respectively connected and fixed to two expansion beams 1131, thereby connecting the two expansion beams 1131 to form an integral structure, which helps to improve the compactness of the overall structure and improve the connection strength of the overall structure.

[0251] For example, a fixing strap 1140 is connected between two opposing structural beam assemblies 1130. The expansion beams 1131 in the two structural beam assemblies 1130 are arranged parallel to each other and are both arranged along the first direction X. The fixing strap 1140 is connected between the two expansion beams 1131. For example, the length direction of the fixing strap 1140 is perpendicular to the first direction X. Multiple fixing straps 1140 can be provided. Multiple fixing straps 1140 can be spaced apart and arranged parallel to each other. Of course, the fixing straps 1140 can also be arranged at an angle or intersecting each other.

[0252] The fixing strap 1140 is connected to the end of the expansion beam 1131 away from the first box wall 1114. If the first box wall 1114 is the bottom wall of the box 1110, then the fixing strap 1140 is connected to the top of the expansion beam 1131. It can be seen that the fixing strap 1140 is located above the battery cell assembly 1120. The fixing strap 1140 can also limit the position of the battery cell assembly 1120.

[0253] In this embodiment, by setting the fixing strap 1140, multiple structural beam components 1130 can form an integral structure, which improves the compactness of the overall structure and enhances the connection strength and rigidity between each structural beam. This helps to reduce the deformation probability of the expansion beam 1131 and can limit the battery cell component 1120 to a certain extent.

[0254] In some embodiments, refer to Figure 16 and Figure 19 As shown, the battery 1100 also includes a plurality of second locking assemblies 1150, and any end of the fixing strap 1140 is connected to the expansion beam 1131 through at least one second locking assembly 1150.

[0255] The connection between the fixing strap 1140 and the expansion beam 1131 can be either fixed or detachable, such as welding or fastener connection. In this example, by providing multiple second locking components 1150, both ends of the fixing strap 1140 can be detachably connected via the second locking components 1150. The second locking components 1150 can be bolt assemblies, etc., which connect and fix the ends of the fixing strap 1140 to the expansion beam 1131.

[0256] In the embodiment, the fixing belt 1140 is detachably connected between the second locking assembly 1150 and the expansion beam 1131, so that the mounting and dismounting between the fixing belt 1140 and the expansion beam 1131 is more convenient.

[0257] In some embodiments, referring to Figure 19 As shown in the drawings, the second locking assembly 1150 comprises a locking seat 1151 and a locking piece 1152, the locking seat 1151 is connected to the expansion beam 1131, and the locking piece 1152 is connected to the locking seat 1151 and the fixing belt 1140 respectively.

[0258] Specifically, the locking seat 1151 can adopt a plate type, a frame type or a solid structure, etc., the locking seat 1151 can be connected to the expansion beam 1131 by welding, bonding or the like, or the locking seat 1151 can be integrally formed with the expansion beam 1131. The locking piece 1152 can adopt a bolt assembly or the like.

[0259] The end of the fixing belt 1140 is connected to the locking seat 1151 through the locking piece 1152, for example, the fixing belt 1140 is in a sheet shape, the locking seat 1151 is formed with a connecting plate, so that the fixing belt 1140 is attached to the connecting plate, the corresponding positions of the fixing belt 1140 and the connecting plate are both provided with a through hole structure, the stud in the bolt assembly is inserted into the through hole structure, and the stud is fixed by the nut, so as to fix the fixing belt 1140 and the locking seat 1151.

[0260] In the embodiment, the locking seat 1151 is arranged, so that the fixing belt 1140 is not directly connected to the expansion beam 1131, the tensile force on the fixing belt 1140 is not directly applied to the expansion beam 1131, but the stress is dispersed and absorbed by the locking seat 1151, so as to protect the expansion beam 1131.

[0261] In some embodiments, referring to Figure 17 and Figure 18 As shown in the drawings, the battery 1100 further comprises a support body 1160, the support body 1160 is connected to the first box wall body 1114 of the box body 1110. The support body 1160 can be in a plate shape, the support body 1160 can be attached to the first box wall body 1114, and a plurality of support bodies 1160 can be arranged at intervals. The support body 1160 can enhance the structural strength of the first box wall body 1114, because the first box wall body 1114 is usually used as a bottom wall body, and the battery monomer assembly 1120 is usually placed on the first box wall body 1114, so that the support body 1160 can enhance the carrying capacity of the first box wall body 1114, and improve the overall structural strength and rigidity of the box body 1110.

[0262] In some specific embodiments, referring toFigures 10-19As shown, the battery 1100 comprises a battery cell assembly 1120, a box 1110 having a containing space 1113, and the expansion beam 1131 in the above embodiment, the battery cell assembly 1120 and the expansion beam 1131 are both contained in the containing space 1113, and the expansion beam 1131 is connected to the box 1110; the battery 1100 further comprises a support 1132 contained in the containing space 1113, the expansion beam 1131 and the support 1132 are both arranged along the first direction X, the expansion beam 1131 is formed with a first side wall body 11312 on one side along the first direction X, the support 1132 is arranged along the first direction X and connected with the first side wall body 11312, the support 1132 is connected to the box 1110, and the support 1132 is arranged opposite to the battery cell assembly 1120; the box 1110 comprises a first box wall body 1114; the support 1132 comprises a first connecting part 11321 and a protruding part 11322 both arranged along the first direction X, the first direction X is parallel to the first box wall body 1114, the first connecting part 11321 is connected to the first box wall body 1114, the protruding part 11322 is connected with the first connecting part 11321, and the protruding part 11322 is protruded on the first connecting part 11321 in a direction away from the first box wall body 1114; the protruding part 11322 comprises a support arm body 113221 outwardly bent in a direction away from the first box wall body 1114, the support arm body 113221 is arranged along the first direction X, a support cavity 1134 is formed between the support arm body 113221 and the first box wall body 1114, and the support arm body 113221 is connected with the expansion beam 1131; the first connecting part 11321 is located on a side of the support arm body 113221 away from the expansion beam 1131 and connected with the support arm body 113221; the support arm body 113221 comprises a first sub-wall body 113222 arranged along the first direction X, and the first sub-wall body 113222 is arranged in abutment with the first side wall body 11312; the battery device 1100 further comprises a bonding structure 1135 connected between the first sub-wall body 113222 and the first side wall body 11312; the support arm body 113221 further comprises a second sub-wall body 113223 and a third wall body 113224 both arranged along the first direction X, the second sub-wall body 113223 is connected with the first sub-wall body 113222, the third wall body 113224 is connected between the second sub-wall body 113223 and the first connecting part 11321, and the first sub-wall body 113222, the second sub-wall body 113223, the third wall body 113224 and the first box wall body 1114 jointly form the support cavity 1134;The support 1132 further comprises a second connecting portion 11323 extending along the first direction X, the second connecting portion 11323 and the first connecting portion 11321 are respectively located on two sides of the protruding portion 11322, and the second connecting portion 11323 is connected with the protruding portion 11322, the second connecting portion 11323 is connected to the first box wall body 1114, and the expansion beam 1131 abuts on the second connecting portion 11323; the battery device 1100 further comprises a first locking assembly 1133 connected with the support 1132 and the expansion beam 1131 respectively; the first side wall body 11312 is provided with a locking arm 11316 protruding therefrom; the locking arm 11316 is arranged in abutment with the support 1132, and the first locking assembly 1133 is connected with the locking arm 11316 and the second sub-wall body 113223 of the support 1132 respectively; the battery 1100 comprises at least two structure beam assemblies 1130 arranged at intervals, each structure beam assembly 1130 comprises an expansion beam 1131 and a support 1132, and each expansion beam 1131 is connected to the first box wall body 1114 of the box body 1110; the battery 1100 further comprises at least one fixing belt 1140, two ends of each fixing belt 1140 are respectively connected with an end of the expansion beam 1131 of any two structure beam assemblies 1130 away from the first box wall body 1114; the battery 1100 further comprises a plurality of second locking assemblies 1150, any end of the fixing belt 1140 is connected with the expansion beam 1131 through at least one second locking assembly 1150; the second locking assembly 1150 comprises a locking seat 1151 and a locking piece 1152, the locking seat 1151 is connected to the expansion beam 1131, and the locking piece 1152 is connected with the locking seat 1151 and the fixing belt 1140 respectively.

[0263] According to some embodiments of the present application, the present application further provides a power storage device, the power storage device comprising a power conversion device and the power storage device in the above embodiments, the power conversion device being used for electrically connecting the power generation device and the power storage device.

[0264] Specifically, the power storage device can comprise one or more battery clusters to improve the voltage and capacity of the power storage device. The battery cluster can comprise a plurality of batteries 1100, and the plurality of batteries 1100 are connected in series through a busbar component to improve the voltage of the power storage device. When the power storage device comprises a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the power storage device.

[0265] The energy storage device can be used in an energy storage power station, a wind power system, a solar power system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electric energy as needed and output the electric energy at an appropriate time. For example, the energy storage device can store electric energy during a low electricity consumption period and provide electric energy for relevant users or electric equipment during a high electricity consumption period. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0266] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0267] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0268] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, and a fire-fighting module, etc.

[0269] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid for adjusting the temperature of the battery monomer through a pipeline to each battery 1100.

[0270] As an example, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, and other modules.

[0271] As an example, the general control module can serve as a battery management unit of the energy storage device for monitoring and managing the energy storage device. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device. For example, the charging and discharging current and voltage of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module IMM (Insulation Monitoring Module, IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and an optical fiber conversion module, and other modules.

[0272] As an example, the fire-fighting module includes a control panel, a detector, an alarm device, etc., for detecting, alarming, or extinguishing the energy storage system.

[0273] As an example, the power distribution module can be used to distribute power to the modules that need power in the energy storage device.

[0274] According to some embodiments of the present application, the present application further provides an energy storage system, which comprises the power conversion device and the energy storage device in the above embodiments, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0275] In some embodiments, the energy storage system can comprise one or more energy storage devices and a power conversion device (PCS) used to connect between the power generation device and the energy storage device. The power generation device is used to generate electric energy, and the electric energy generated by the power generation device can be stored into the energy storage device through the power conversion device. As an example, the power generation device can be a solar panel, a water power generation device, a fire power generation device, a wind power generation device, etc. The specific type of the power generation device is not limited in the present application.

[0276] According to some embodiments of the present application, referring to FIG. 1, the present application further provides a power utilization device, which comprises the battery 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments, and the battery 1100 is used to store or provide electric energy. Figure 1

[0277] The technical solutions described in the embodiments of the present application are applicable to various power utilization devices using battery monomers, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0278] The examples of the power utilization device in the present application are based on the examples of the above-mentioned battery 1100, and the examples of the power utilization device contain all the technical effects of the examples of the above-mentioned battery 1100, which will not be described again.

[0279] According to some embodiments of the present application, the present application further provides a charging network, which comprises a charging pile and the energy storage device in the above embodiments or the energy storage system in the above embodiments, and the energy storage device is used to provide electric energy for the charging pile.

[0280] For example, the charging network comprises a charging pile and an energy storage device, the charging pile is electrically connected with the energy storage device, and the energy storage device is used to provide electric energy for the charging pile. The charging pile and the battery 1100 in the energy storage device are electrically connected through a cable, and the battery 1100 can provide the electric energy stored therein to the charging pile. The charging pile has one or more connectors used to connect with the power utilization device (such as the vehicle 1000), so as to charge the power utilization device.

[0281] The energy storage device can be located inside the charging pile (such as a charging and storage integrated machine) or outside the charging pile.

[0282] ​The above merely describes preferred embodiments of the present application, and only specifically describes the technical principles of the present application, and these descriptions are only for explaining the principles of the present application, and cannot be explained as limitations on the protection scope of the present application in any way. Based on the explanations here, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application, and other specific embodiments of the present application that can be thought of by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. An expansion beam (1131), characterized in that, include: The supporting structure layer (11318) includes a plurality of core wires (113181) extending along a first direction (X), and the plurality of core wires (113181) are arranged around the first direction (X) and surround the molding cavity (11311); A fabric layer (11319) is wrapped around the outer surface of the supporting structure layer (11318); the fabric layer (11319) includes at least a first fiber body (113191), a second fiber body (113192), and a third fiber body (113193) interwoven with each other. The first fiber body (113191) extends along a second direction (Y), the second fiber body (113192) is arranged to intersect the first fiber body (113191) at a first angle (a) in a clockwise direction, and the third fiber body (113193) is arranged to intersect the first fiber body (113191) at a second angle (β) in a counterclockwise direction; the second direction (Y) is perpendicular to the first direction (X). A curing agent (11320) is filled in the gaps between adjacent core filaments (113181), and the curing agent (11320) is connected between the support structure layer (11318) and the fabric layer (11319) so that the support structure layer (11318) and the fabric layer (11319) are cured into one piece.

2. The expansion beam (1131) as described in claim 1, characterized in that, The first included angle (a) ranges from 15° to 60°; and / or The second included angle (β) ranges from 15° to 60°.

3. The expansion beam (1131) as described in claim 1 or 2, characterized in that, The fabric layer (11319) further includes a fourth fiber (113194) that is interwoven with the first fiber (113191), the second fiber (113192) and the third fiber (113193), and the fourth fiber (113194) extends along the first direction (X).

4. The expansion beam (1131) as described in claim 1 or 2, characterized in that, The fabric layer (11319) includes a first layer (113195) and a second layer (113196). The first layer (113195) is wrapped around the outer surface of the support structure layer (11318), and the second layer (113196) is attached to the cavity wall of the cavity (11311).

5. The expansion beam (1131) as described in claim 1 or 2, characterized in that, The cavity (11311) has a first cavity wall and a second cavity wall, and at least one rib (11317) extends from the first cavity wall toward the second cavity wall.

6. An expansion beam manufacturing device (2000), characterized in that, The fabrication apparatus is used to fabricate the expansion beam (1131) as described in any one of claims 1-5, and the expansion beam fabrication apparatus (2000) comprises: The first feeding assembly (2100) is used to feed the core wire (113181); The second feeding assembly (2200) is used to convey the fabric layer (11319); A preforming mold (2300) is located at the discharge end of the first feeding assembly (2100) and the second feeding assembly (2200). A forming channel is formed on the preforming mold (2300). The core filament (113181) and the fabric layer (11319) pass through the forming channel. The forming channel enables the core filament (113181) and the fabric layer (11319) to be arranged in a gradually narrowed manner in a first direction (X) to be pre-shaped into a preset shape. The shaping component (2400) is located at the discharge end of the preforming mold (2300). The core wire (113181), the fabric layer (11319), and the curing agent (11320) are cured and shaped in the shaping component (2400) into a fixed shape. A traction forming assembly (2500) is located at the discharge end of the shaping assembly (2400). The traction forming assembly (2500) is used to stretch and form the core filament (113181) and the fabric layer (11319).

7. The expansion beam manufacturing apparatus (2000) as described in claim 6, characterized in that, The preforming mold (2300) includes a plurality of forming frames (2310) arranged at intervals along the first direction (X). Each forming frame (2310) has a forming sub-channel (2311). Along the first direction (X), the outer contour size of each forming sub-channel (2311) decreases, so that the core filament (113181) and the fabric layer (11319) passing through each forming sub-channel (2311) are gradually shaped into the preset shape.

8. The expansion beam manufacturing apparatus (2000) as described in claim 6, characterized in that, The forming channel has a channel axis corresponding to the center of the expansion beam (1131). The forming channel includes a first sub-channel (23111) and a second sub-channel (23112). The first sub-channel (23111) is used to thread the core wire (113181), and the second sub-channel (23112) is used to thread the fabric layer (11319). The second sub-channel (23112) is located on the side of the first sub-channel (23111) away from the channel axis.

9. The expansion beam manufacturing apparatus (2000) as described in claim 6, characterized in that, The shaping component (2400) includes a third feeding component (2420) and a shaping mold (2410). The core filament (113181) and the fabric layer (11319) are inserted into the shaping mold (2410). The third feeding component (2420) is connected to the shaping mold (2410). The third feeding component (2420) can deliver curing agent (11320) into the shaping mold (2410) so that the core filament (113181) and the fabric layer (11319) are cured and formed.

10. A method for manufacturing an expansion beam (1131), characterized in that, The method is used to prepare the expansion beam (1131) as described in any one of claims 1-5, and the method includes the following steps: Pre-formed core filament (113181) and fabric layer (11319); The core filament (113181) and the fabric layer (11319) are formed by a pre-forming mold (2300) so that the core filament (113181) and the fabric layer (11319) form a tapering trend along the first direction (X); The core filament (113181), the fabric layer (11319), and the curing agent (11320) are cured and shaped into a fixed shape by the shaping component (2400); The core filament (113181) and the fabric layer (11319) are stretched and shaped by the traction forming assembly (2500).

11. The method for manufacturing the expansion beam (1131) as described in claim 10, characterized in that, In the step of the core filament (113181) and the fabric layer (11319) passing through the preforming mold (2300), the preforming mold (2300) causes the core filament (113181) to pass through the first sub-channel (23111) and the fabric layer (11319) to pass through the second sub-channel (23112), the first sub-channel (23111) and the second sub-channel (23112) being arranged parallel to each other at intervals.

12. The method for manufacturing the expansion beam (1131) as described in claim 10, characterized in that, In the step of forming a tapering trend in the core filament (113181) and the fabric layer (11319) along the first direction (X), the preforming mold (2300) includes a plurality of forming frames (2310) arranged sequentially at intervals along the first direction (X). Each forming frame (2310) is provided with a forming sub-channel (2311). Along the first direction (X), the outer contour size of each forming sub-channel (2311) decreases, so that the core filament (113181) and the fabric layer (11319) passing through each forming sub-channel (2311) in sequence are tapered and shaped into a preset shape.

13. A battery (1100), characterized in that, The battery (1100) includes a battery cell assembly (1120), a housing (1110), and an expansion beam (1131) as described in any one of claims 1-8. The housing (1110) has an accommodating space (1113), and both the battery cell assembly (1120) and the expansion beam (1131) are accommodated within the accommodating space (1113). The expansion beam (1131) is connected to the housing (1110).

14. The battery (1100) as claimed in claim 13, characterized in that, The battery (1100) further includes a support member (1132) housed within the accommodating space (1113). Both the expansion beam (1131) and the support member (1132) extend along a first direction (X). The expansion beam (1131) has a first sidewall (11312) on one side along the first direction (X). The support member (1132) extends along the first direction (X) and is connected to the first sidewall (11312). The support member (1132) is connected to the housing (1110). The support member (1132) is arranged opposite to the battery (1100) individual assembly.

15. The battery (1100) as claimed in claim 14, characterized in that, The battery (1100) also includes a first locking assembly (1133), which is connected to the support member (1132) and the expansion beam (1131) respectively.

16. The battery (1100) as claimed in claim 13, characterized in that, The battery (1100) includes at least two expansion beams (1131) spaced apart from each other, and each expansion beam (1131) is connected to the first box wall (1114) of the box body (1110); the battery (1100) also includes at least one fixing strap (1140), and the two ends of each fixing strap (1140) are respectively connected to the ends of any two expansion beams (1131) away from the first box wall (1114).

17. The battery (1100) as claimed in claim 16, characterized in that, The battery (1100) also includes a plurality of second locking assemblies (1150), and any end of the fixing strap (1140) is connected to the expansion beam (1131) through at least one of the second locking assemblies (1150).

18. An energy storage device, characterized in that, Includes a plurality of batteries (1100) as described in any one of claims 13-17, said batteries (1100) for storing or providing electrical energy.

19. An energy storage system comprising a power conversion device and an energy storage device as claimed in claim 18, wherein the power conversion device is configured to electrically connect a power generation device and the energy storage device.

20. An electrical device comprising a battery (1100) as claimed in any one of claims 13-17, an energy storage device as claimed in claim 18, or an energy storage system as claimed in claim 19, wherein the battery (1100) is used to store or provide electrical energy.

21. A charging network comprising a charging pile and an energy storage device as claimed in claim 18 or an energy storage system as claimed in claim 19, wherein the energy storage device is used to provide electrical energy to the charging pile.

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