Expansion beam, battery and electric device

Abstract

The utility model discloses an expansion beam, a battery and a power utilization device. The expansion beam comprises an expansion beam body; the insulation part comprises an insulation layer and at least one connecting part, the insulation layer is arranged on the outer side of the expansion beam body, the connecting part is arranged on the side, away from the expansion beam body, of the insulation layer, and the insulation part is an integrally-formed part. According to the technical scheme, the connecting piece and the insulating layer are integrally formed, the insulating piece is connected to the outer side of the expansion beam body, an insulating film does not need to be additionally attached, and the process of independently connecting the connecting piece and the expansion beam body is omitted, so that the assembly process is simplified, the production efficiency can be improved, and the cost is reduced; the quality risk of neglected loading or wrong loading can be reduced, and meanwhile the overall structural strength and rigidity of the expansion beam can be improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The battery includes a case and battery cells. The battery cells are arranged in the case. An expansion beam is provided in the case. The expansion beam can withstand the expansion force from the internal battery cells and maintain the stability of the battery structure. The outside of the expansion beam needs to be wrapped with an insulating tape to insulate the expansion beam. Mounting components such as the output pole base must also be installed in the case, which results in cumbersome assembly process and high assembly cost. Utility Model Content

[0004] In view of the above problems, the present application provides an expansion beam, a battery and an electrical device, which can alleviate the problems of complicated assembly process and high assembly cost.

[0005] In a first aspect, the present application provides an expansion beam, comprising: an expansion beam body; an insulating member, the insulating member comprising an insulating layer and at least one connecting member, the insulating layer being arranged on the outside of the expansion beam body, the connecting member being arranged on the side of the insulating layer away from the expansion beam body, and the insulating member being an integrally formed member.

[0006] In the technical solution of the embodiment of the present application, the connecting part and the insulating layer are integrally formed, and the insulating part is connected to the outside of the expansion beam body. There is no need to additionally attach insulating film, and the process of separately connecting the connecting part to the expansion beam body is eliminated, thereby simplifying the assembly process, improving production efficiency, reducing costs, reducing the quality risks of missing or wrong installation, and at the same time improving the overall structural strength and rigidity of the expansion beam.

[0007] In some embodiments, the insulating member further comprises a limiting protrusion, the limiting protrusion is arranged on the side of the insulating layer facing the expansion beam body, the outer surface of the expansion beam body has an inwardly recessed limiting groove, and the limiting protrusion cooperates with the limiting groove. In the above technical solution, the stability of the connection between the insulating member and the expansion beam body can be improved, the probability of the insulating layer and the expansion beam body being out of fit or misaligned can be reduced, and the reliability of the external insulation of the expansion beam can be improved.

[0008] In some embodiments, the width of at least a portion of the limiting groove gradually decreases along a direction approaching an opening of the limiting groove.

[0009] In the above technical solution, the limiting protrusion is difficult to escape from the limiting groove, thereby improving the stability of the connection between the insulating member and the expansion beam body and reducing the probability of the insulating member and the expansion beam body being out of engagement.

[0010] In some embodiments, the expansion beam extends along a first direction, and the limiting groove extends along the first direction.

[0011] In the above technical solution, the extension direction of the limiting protrusion is the same as the extension direction of the expansion beam body. When the insulating layer cooperates with the expansion beam body, the contact area between the limiting protrusion and the limiting groove can be increased to improve the stability of the connection.

[0012] In some embodiments, the cross-sectional shape of the limiting groove perpendicular to the first direction is a trapezoid. In the above technical solution, the limiting protrusion is difficult to escape from the limiting groove, thereby improving the stability of the connection between the insulating member and the expansion beam body and reducing the probability of the insulating member and the expansion beam body being out of coordination.

[0013] In some embodiments, the limiting grooves include a plurality of limiting grooves, and at least two of the limiting grooves have different opening directions. In the above technical solution, the opening directions of the plurality of limiting grooves are not completely the same, and the cooperation between the limiting protrusion and the limiting groove can limit the insulating member and the expansion beam body in multiple directions, which can further prevent the insulating member from being out of cooperation with the expansion beam body, thereby improving the stability of the expansion beam.

[0014] In some embodiments, the expansion beam body has a first side surface and a second side surface connected to the first side surface, the insulating layer includes a first portion and a second portion, the first portion cooperates with the first side surface of the expansion beam body, the second portion cooperates with the second side surface of the expansion beam body, and the second portion is provided with at least one of the connecting members. In the above technical solution, the insulating layer wraps a portion of the expansion beam body, which reduces the weight of the insulating member, reduces the cost, and facilitates the connection between the insulating member and the expansion beam body.

[0015] In some embodiments, the insulating layer is annular and wraps at least a portion of the expansion beam body. In the above technical solution, the insulation performance of the expansion beam is improved, and the strength of the expansion beam can be improved by wrapping at least a portion of the expansion beam body with the insulating layer. The provision of the insulating layer can also make the expansion beam body thinner, thereby reducing the amount of material used for the expansion beam body and reducing the cost of raw materials.

[0016] In some embodiments, the connector has a connection hole and / or a connection groove, and the connector is used to connect the structural member of the battery. In the above technical solution, the installation of the structural member and the connector is more convenient.

[0017] In some embodiments, the insulating member is injection molded on the expansion beam body. In the above technical solution, the expansion beam body is used as the substrate, and the insulating layer and the connecting member are integrally injection molded on the surface of the expansion beam body, thereby improving the reliability of the connection between the insulating member and the expansion beam body, improving the structural strength of the expansion beam, and at the same time eliminating the connection process of the connecting member and the expansion beam body, eliminating the need for additional manual application of insulating film, simplifying the assembly process, improving production efficiency, effectively saving labor costs, and reducing the quality risk of missing / wrong installation.

[0018] In some embodiments, the insulating member comprises a plastic member. In the above technical solution, the plastic member has low cost and good insulation, and is convenient for integral injection molding of the insulating member and the expansion beam body.

[0019] In some embodiments, the expansion beam body includes an outer frame, the outer frame extends along a first direction and forms a cavity, and the insulating layer is arranged on the outer side of the outer frame. In the above technical solution, the strength of the outer frame can be improved, and the outer frame can also be thinned, thereby reducing the amount of material used for the outer frame and reducing the cost of raw materials; the cavity inside the outer frame can provide energy absorption space, reduce the deformation of the expansion beam body under the action of external force, and at the same time reduce the overall weight of the expansion beam body, which is conducive to improving the energy density of the battery.

[0020] In some embodiments, the expansion beam body further comprises: reinforcing ribs, which are arranged in the cavity and connected to the inner side of the outer frame. In the above technical solution, by providing the reinforcing ribs, the wall of the outer frame can be supported, thereby effectively improving the overall structural strength of the expansion beam body.

[0021] In a second aspect, the present application provides a battery, which includes the expansion beam in the above embodiment.

[0022] In a third aspect, the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 is a schematic diagram of an electrical device in the related art;

[0026] Figure 2 is a schematic diagram of a battery in the related art;

[0027] Figure 3 A schematic diagram of an expansion beam provided for some embodiments of the present application;

[0028] Figure 4 Schematic diagram of expansion beams provided for other embodiments of the present application;

[0029] Figure 5 for Figure 4 a cross-sectional view of the structure shown;

[0030] Figure 6 for Figure 5 The middle circle shows an enlarged view of A;

[0031] Figure 7 A schematic diagram of an expansion beam provided for some other embodiments of the present application;

[0032] Figure 8 Schematic diagram of an expansion beam provided in some further embodiments of the present application.

[0033] Reference numerals:

[0034] Battery 1000, power-consuming device 2000,

[0035] Expansion beam 100,

[0036] Expansion beam body 10, outer frame 11, reinforcing ribs 12, limiting grooves 13,

[0037] Insulating member 20, insulating layer 21, first portion 211, second portion 212, connecting member 22, limiting protrusion 23,

[0038] Box body 200 , upper box body 210 , lower box body 220 , battery cell 300 . DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0041] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

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

[0044] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0045] The term "plurality" used in the present application refers to two or more (including two).

[0046] In this application, a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. Some batteries may include a casing for encapsulating one or more battery cells or multiple battery modules. The casing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. Of course, some batteries may not include the above-mentioned casing and are directly set in the battery installation compartment of the electrical device.

[0047] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0048] For example, a battery cell may include a housing, an electrode assembly and an electrolyte, wherein the housing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode collector, and the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0049] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0050] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0051] The battery cell may be provided with a pole or the like connected to the pole lug as the electrical connection part of the battery cell. In addition, the battery cell may have a pressure relief part. When the internal pressure of the battery cell is too high (for example, thermal runaway), the pressure relief part is used to release the internal substances of the battery cell (for example, gas, liquid, particulate matter, etc.) to reduce the internal pressure of the battery cell and avoid the internal pressure of the battery cell being too quickly pressurized, which may lead to dangerous accidents such as explosion of the battery cell. For example, the pressure relief part may be an explosion-proof valve, an explosion-proof plate, etc.

[0052] For example Figure 1 and Figure 2 As shown, in some electrical devices 2000, a battery 1000 is used for power supply. The battery 1000 includes a box body 200 and a battery cell 300. The box body 200 includes an upper box body 210 and a lower box body 220. The battery cell 300 is arranged in the box body 200. In the conventional technology, an expansion beam 100 is arranged in the box body 200. The expansion beam 100 can withstand the expansion force from the internal battery cell 300 to maintain the stability of the structure of the battery 1000. The box body 200 is also provided with mounting components such as an output pole base. The output pole base and other mounting components need to be installed on the expansion beam 100 through connection processes such as riveting or bolting, which will cause additional installation labor costs and processing costs, and there is also a risk of missing installation. The expansion beam 100 also needs to be pasted with insulating materials such as composite tape, which also requires labor costs and teaching staff costs, and there is also a risk of loose adhesion and easy falling off, which leads to cumbersome assembly process and high assembly cost in the battery 1000.

[0053] To this end, the present application proposes an expansion beam 100 comprising: an expansion beam body 10 and an insulating member 20, the insulating member 20 comprising an insulating layer 21 and at least one connecting member 22, the insulating layer 21 being arranged on the outer side of the expansion beam body 10, the connecting member 22 being arranged on the side of the insulating layer 21 away from the expansion beam body 10, and the insulating member 20 being an integrally formed member.

[0054] In the expansion beam 100 of the above-mentioned structure, the connecting member 22 and the insulating layer 21 are integrally formed, and the insulating member 20 is connected to the outer side of the expansion beam body 10, which eliminates the need for additional insulating film and saves the process of separately connecting the connecting member 22 to the expansion beam body 10, thereby simplifying the assembly process, improving production efficiency, reducing costs, reducing the quality risks of missing or wrong installation, and also improving the overall structural strength and rigidity of the expansion beam 100.

[0055] The battery 1000 with an expansion beam disclosed in the embodiment of the present application can be used in, but not limited to, an electrical device 2000 such as a vehicle, a ship or an aircraft. The power supply system of the electrical device 2000 composed of the battery 1000 disclosed in the present application can ensure the safety and reliability of the electrical device 2000.

[0056] For example, the power-consuming device 2000 disclosed in the embodiment of the present application may be, but is not limited to, a vehicle, a mobile phone, a tablet, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0057] Hereinafter, a battery 1000 according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0058] like Figure 3-Figure 8 As shown, Figure 3 , Figure 4 , Figure 7 and Figure 8 Some expansion beams for batteries 1000 provided in embodiments of the present application are shown. According to the expansion beam 100 of the embodiments of the present application, the expansion beam 100 includes: an expansion beam body 10 and an insulating member 20, the insulating member 20 includes an insulating layer 21 and at least one connecting member 22, the insulating layer 21 is arranged on the outer side of the expansion beam body 10, the connecting member 22 is arranged on the side of the insulating layer 21 away from the expansion beam body 10, and the insulating member 20 is an integrally formed member.

[0059] The expansion beam body 10 is used to resist the expansion and deformation of the battery cells 300 in the battery 1000 during operation. For example, the expansion beam body 10 includes an outer frame 11, and the outer frame 11 has a cavity. The outer frame 11 can be integrally formed by a plate body through a rolling process. The plate body can be but is not limited to a steel plate, an iron plate, an aluminum plate or other alloy material plates; the cavity inside the outer frame 11 can provide energy absorption space, reduce the deformation of the expansion beam body 10 caused by external force, and at the same time can reduce the overall weight of the expansion beam body 10, which is beneficial to improve the energy density of the battery.

[0060] For example, the outer frame 11 further has reinforcing ribs 12 , which can support the wall of the outer frame 11 and effectively improve the overall structural strength of the expansion beam body 10 .

[0061] The insulating part 20 includes an insulating layer 21 and a connecting part 22. The insulating layer 21 is arranged on the outside of the expansion beam body 10. The insulating layer 21 can cover a part of the outer side of the expansion beam body 10, or can cover a part of the outer side of the expansion beam body 10. The insulating layer 21 can insulate the outside of the expansion beam body 10, thereby avoiding the risk of leakage. There is no need to manually affix insulating film, and at the same time, the flatness of the outer surface of the expansion beam 100 can be improved. By arranging the insulating layer 21 on the outside of the expansion beam body 10, the strength of the expansion beam 100 can also be improved.

[0062] By way of example, the connector 22 may be an output pole base, and the connector 22 is used to connect the output pole connecting piece of the battery cell. The connector 22 is a part of the insulating member 20, and the connector 22 may provide insulation protection for the output pole connecting piece. By way of example, the connector 22 may be a mounting bracket, and the mounting bracket may be used to install the wiring harness inside the battery 1000, and the connector 22 may provide insulation protection for the wiring harness.

[0063] The insulating part 20 is an integrally molded part, that is, the connecting part 22 and the insulating layer 21 are integrally molded, for example, integrally injection molded. For example, the insulating part 20 can be integrally injection molded on the expansion beam body 10, and the insulating part 20 can also be bonded to the expansion beam body 10 through the insulating layer 21. Thus, the insulating part 20 can be integrally connected to the expansion beam body 10, eliminating the process of separately connecting the connecting part 22 to the expansion beam body 10, which can simplify the assembly process, improve production efficiency, and reduce costs, and can also reduce the weak connection points on the expansion beam 100, which is beneficial to improving the overall structural strength and rigidity of the expansion beam 100.

[0064] According to the expansion beam 100 of the embodiment of the present application, the connecting member 22 and the insulating layer 21 are integrally formed, and the insulating member 20 is connected to the outer side of the expansion beam body 10, which eliminates the need for additional insulating film and eliminates the process of separately connecting the connecting member 22 to the expansion beam body 10, thereby simplifying the assembly process, improving production efficiency, reducing costs, and reducing the quality risks of missing or wrong installation, while also improving the overall structural strength and rigidity of the expansion beam 100.

[0065] like Figure 5 and Figure 6 As shown, in some embodiments, the insulating member 20 also includes a limiting protrusion 23, which is arranged on the side of the insulating layer 21 facing the expansion beam body 10, and the outer surface of the expansion beam body 10 has an inwardly recessed limiting groove 13, and the limiting protrusion 23 cooperates with the limiting groove 13.

[0066] like Figure 6As shown, the outer surface of the expansion beam body 10 has a limiting groove 13, and the limiting groove 13 can be integrally formed by the plate body of the expansion beam body 10 through a rolling process, or can be formed by the plate body of the expansion beam body 10 through a stamping process.

[0067] The limiting protrusion 23 protrudes from one side of the insulating layer 21, and the limiting protrusion 23 can be inserted into the limiting groove 13. The shape of the limiting protrusion 23 is the same as that of the limiting groove 13, so that the limiting protrusion 23 fits the inner wall surface of the limiting groove 13. The insulating member 20 is an integrally formed member, that is, the limiting protrusion 23 is integrally formed with the connecting member 22 and the insulating layer 21. After the limiting protrusion 23 is matched with the limiting groove 13, the stability of the connection between the insulating member 20 and the expansion beam body 10 can be improved, the probability of the insulation layer 13 and the expansion beam body 10 being out of match or misaligned can be reduced, and the reliability of the external insulation of the expansion beam 100 can be improved.

[0068] like Figure 6 As shown, in some embodiments, the width of at least a portion of the limiting groove 13 gradually decreases along a direction approaching the opening of the limiting groove 13 .

[0069] The width direction of the limiting groove 13 is perpendicular to the extension direction of the limiting groove 13 and perpendicular to the depth direction of the limiting groove 13. Figure 6 As shown, the width of the limiting groove 13 is the dimension of the limiting groove 13 in the front-to-back direction, and the depth direction of the limiting groove 13 (such as Figure 6 In the up and down direction shown in FIG. 1 , the width of the limit groove 13 is different, and the limit groove 13 can be formed into a constricted shape, such as Figure 6 As shown, the limiting groove 13 forms a trapezoidal groove, the upper side of the limiting groove 13 is open, and the groove width dimension at the opening on the upper side of the limiting groove 13 is the smallest. Therefore, after the limiting protrusion 23 is inserted into the limiting groove 13, the limiting protrusion 23 is difficult to escape from the limiting groove 13, thereby improving the stability of the connection between the insulating part 20 and the expansion beam body 10 and reducing the probability of the insulating part 20 and the expansion beam body 10 being out of coordination.

[0070] Of course, the limiting groove 13 can also be a circular groove. When the upper part of the limiting groove 13 is opened, the groove width of the limiting groove 13 first increases and then decreases from bottom to top; the limiting groove 13 can also be a T-shaped groove. The limiting groove 13 includes two sections. When the upper part of the limiting groove 13 is opened, the limiting groove 13 includes an upper section and a lower section, and the groove width of the upper section is smaller than the groove width of the lower section.

[0071] like Figure 4 and Figure 7 As shown, in some embodiments, the expansion beam body 10 extends along the first direction, and the limiting groove 13 extends along the first direction.

[0072] like Figure 4 and Figure 7As shown, the first direction is the left-right direction, the extension direction of the limiting groove 13 is the same as the extension direction of the expansion beam body 10, and the limiting protrusion 23 matches the limiting groove 13, so that the extension direction of the limiting protrusion 23 is the same as the extension direction of the expansion beam body 10. When the insulating layer 21 cooperates with the expansion beam body 10, the contact area between the limiting protrusion 23 and the limiting groove 13 can be increased to improve the stability of the connection.

[0073] like Figure 4 As shown, the left and right ends of the insulating layer 21 extend to the left and right ends of the expansion beam body 10, thereby increasing the matching area of ​​the insulating member 20 and the expansion beam body 10, and improving the insulation performance of the expansion beam 100. At this time, holes corresponding to the positions can be opened on the insulating layer 21 and the expansion beam body 10, so that the expansion beam 100 and the tray and other structural parts in the box body 200 can be connected by fasteners; Figure 7 As shown, the end of the insulating layer 21 extends to the end adjacent to the expansion beam body 10. In the extension direction of the expansion beam body 10, the insulating layer 21 covers a portion of the expansion beam body 10, leaving a portion of the expansion beam body 10 exposed to facilitate welding of the expansion beam body 10 with structural parts such as the tray in the box body 200.

[0074] like Figure 6 As shown, in some embodiments, the cross-sectional shape of the limiting groove 13 perpendicular to the first direction is a trapezoid.

[0075] like Figure 6 As shown, the cross-sectional shape of the limit groove 13 is a trapezoid, so that the limit groove 13 can form a constricted shape, and the groove width at the opening of the limit groove 13 is the smallest. Therefore, after the limit protrusion 23 is inserted into the limit groove 13, the limit protrusion 23 is difficult to escape from the limit groove 13, thereby improving the stability of the connection between the insulating part 20 and the expansion beam body 10 and reducing the probability of the insulating part 20 and the expansion beam body 10 being out of coordination.

[0076] like Figure 5 As shown, in some embodiments, the limiting groove 13 includes a plurality of limiting grooves, and at least two limiting grooves 13 have opening directions different from each other.

[0077] like Figure 5 As shown, the outer periphery of the expansion beam body 10 is provided with a plurality of limiting grooves 13, and the plurality of limiting grooves 13 are arranged at intervals along a circumferential direction, and each limiting groove 13 can be arranged along the length direction of the expansion beam body 10 (such as Figure 4 The limiting protrusion 23 extends in the left and right directions as shown), thereby increasing the matching surface of the limiting protrusion 23 and the limiting groove 13. At the same time, the opening directions of the plurality of limiting grooves 13 are not exactly the same. The matching of the limiting protrusion 23 and the limiting groove 13 can limit the insulating member 20 and the expansion beam body 10 in multiple directions, thereby further preventing the insulating member 20 from being out of match with the expansion beam body 10, and improving the stability of the expansion beam 100.

[0078] like Figure 7 As shown, in some embodiments, the expansion beam body 10 has a first side and a second side connected to the first side, the insulating layer 21 includes a first part 211 and a second part 212, the first part 211 cooperates with the first side of the expansion beam body 10, the second part 212 cooperates with the second side of the expansion beam body 10, and the second part 212 is provided with at least one connecting member 22.

[0079] like Figure 7 As shown, the expansion beam body 10 has a front side and an upper side, the insulating layer 21 includes a first part 211 and a second part 212, the first part 211 is arranged on the front side of the front side, and the second part 212 is arranged on the upper side of the upper side, so that the upper part of the expansion beam body 10 has a connecting piece 22, the insulating layer 21 can be fitted with the surface of the expansion beam body 10, the expansion beam 100 can be installed on the rear side of the battery cell 300, and the front side of the expansion beam body 10 can be separated from the battery cell 300 by the first part 211 of the insulating layer 21, so that the expansion beam can withstand the expansion force from the internal battery cell 300 and can prevent leakage, etc.

[0080] Thus, the insulating layer 21 wraps a portion of the expansion beam body 10 , which reduces the weight of the insulating member 20 , lowers the cost, and facilitates the connection between the insulating member 21 and the expansion beam body 10 .

[0081] like Figure 4-Figure 7 As shown, in some embodiments, the insulating layer 21 is annular, and the insulating layer 21 wraps at least a portion of the expansion beam body 10 .

[0082] like Figure 4-Figure 7 As shown, the insulating layer 21 extends along the outer periphery of the expansion beam body 10 to form an annular insulating layer 21. For example, as shown in FIG. Figure 4 As shown, the insulating layer 21 can wrap the periphery of the expansion beam body 10, so that the outside of the expansion beam 100 is completely insulated, thereby improving the insulation performance of the expansion beam 100; for example, the insulating layer 21 can wrap a part of the periphery of the expansion beam body 10, so that the end of the expansion beam body 10 is partially exposed, so as to facilitate the welding connection of the expansion beam 100 with other structures.

[0083] In addition, by wrapping at least a portion of the expansion beam body 10 with the insulating layer 21, the strength of the expansion beam 100 can be improved. The provision of the insulating layer 21 can also thin the expansion beam body 10, thereby reducing the amount of material used in the expansion beam body 10 and reducing the cost of raw materials.

[0084] like Figure 4 As shown, in some embodiments, the connector 22 has a connecting hole and / or a connecting groove, and the connector 22 is used to connect the structural members of the battery.

[0085] like Figure 4 As shown, the connector 22 has a connecting hole, through which the structural parts of the battery can be installed and fixed, and the connector 22 can insulate and protect the structural parts. The connector 22 is used to connect the output pole connecting piece of the battery cell, and the output pole connecting piece can pass through the connecting hole of the connector 22; of course, the connector 22 can also have a connecting groove, and the structural part can be inserted into the connecting groove, or it can be snapped into the connecting groove, so that the installation of the structural part and the connector 22 is more convenient.

[0086] In some embodiments, the insulating member 20 is injection molded on the expansion beam body 10 .

[0087] That is, after the expansion beam body 10 is processed, the expansion beam body 10 is used as the substrate, and the insulating layer 21 and the connecting piece 22 are integrally injection molded on the surface of the expansion beam body 10. This can improve the reliability of the connection between the insulating piece 20 and the expansion beam body 10, and improve the structural strength of the expansion beam 100. At the same time, the connection process between the connecting piece 22 and the expansion beam body 10 is eliminated, and there is no need to manually stick additional insulating film, which simplifies the assembly process, improves production efficiency, effectively saves labor costs, and reduces the quality risk of missing / wrong installation.

[0088] In some embodiments, the insulating member 20 includes a plastic member.

[0089] The insulating member 20 can be made of resin as the raw material of synthetic plastic, and the insulating member 20 can be injection molded on the expansion beam body 10. The plastic part has low cost and good insulation, and it is convenient to integrally inject mold the insulating member 20 and the expansion beam body 10.

[0090] like Figure 5 As shown, in some embodiments, the expansion beam body 10 includes an outer frame 11 , the outer frame 11 extends along a first direction and forms a cavity, and the insulation layer 21 is disposed on the outer side of the outer frame 11 .

[0091] like Figure 5 As shown, the outer frame 11 has a cavity, and the insulating layer 21 is arranged on the outside of the outer frame 11. The insulating layer 21 wraps at least a portion of the outer frame 11, which can improve the strength of the outer frame 11 and can also be designed to be thinner, thereby reducing the amount of material used in the outer frame 11 and reducing the cost of raw materials; the cavity inside the outer frame 11 can provide energy-absorbing space, reduce the deformation of the expansion beam body 10 under the action of external force, and at the same time can reduce the overall weight of the expansion beam body 10, which is beneficial to improving the energy density of the battery.

[0092] The cross-sectional shape of the outer frame 11 along the direction perpendicular to the first direction may be, but is not limited to, a rectangle, an ellipse, a trapezoid, etc.

[0093] like Figure 5 As shown, the expansion beam body 10 further includes: a reinforcing rib 12 , which is disposed in the cavity and connected to the inner side of the outer frame 11 .

[0094] like Figure 5 As shown, a reinforcing rib 12 is provided in the cavity. Of course, there may be multiple reinforcing ribs 12, and the reinforcing ribs 12 may be in a straight line, a Z shape, an I shape, etc. The connection between the reinforcing rib 12 and the outer frame 11 may be, but is not limited to, welding, bolt connection or clamping.

[0095] By providing the reinforcing ribs 12 , the wall of the outer frame 11 can be supported, thereby effectively improving the overall structural strength of the expansion beam body 10 .

[0096] The battery 1000 according to the second aspect embodiment of the present application includes the expansion beam 100 according to the above-mentioned second aspect embodiment of the present application. By adopting the above-mentioned expansion beam 100, the assembly process can be simplified, the production efficiency can be improved, the cost can be reduced, the quality risk of missing or wrong installation of the connecting part 22 can be reduced, and the overall structural strength and rigidity of the expansion beam 100 can be improved, thereby effectively resisting the expansion and deformation of the battery cell 300 during operation.

[0097] The electric device 2000 according to the third embodiment of the present application includes the battery 1000 according to the second embodiment of the present application, and the battery 1000 is used to provide electric energy for the electric device 2000. Therefore, by using the above battery 1000, it is beneficial to improve the safety and reliability of the electric device 2000.

[0098] Alternatively, if Figure 1 As shown, when the battery 1000 is used in a vehicle, the battery 1000 can be arranged at the bottom, head, or tail of the vehicle. The battery 1000 can be used to power the vehicle, for example, the battery 1000 can be used as an operating power source for the vehicle. The vehicle can also include a controller and a motor, and the controller is used to control the battery 1000 to power the motor, for example, for starting, navigating, and driving the vehicle.

[0099] A battery 1000 and a vehicle having the same according to a specific embodiment of the present application will be described below with reference to the accompanying drawings.

[0100] like Figure 1 As shown, the battery 1000 is disposed at the bottom of the vehicle, and as Figure 2 As shown, the battery 1000 includes a box body 200 and a plurality of battery cells 300, wherein the box body 200 is provided with an expansion beam 100, as shown in FIG. Figure 4As shown, the expansion beam 100 includes an expansion beam body 10 and an insulating member 20. The outer periphery of the expansion beam body 10 is provided with an inwardly recessed limiting groove 13. The insulating member 20 includes an insulating layer 21, a plurality of connecting members 22 and a limiting protrusion 23. The insulating layer 21 is wrapped around the outer periphery of the expansion beam body 10 to form an annular structure. The connecting member 22 is arranged on the outer side of the insulating layer 21. The connecting member 22 includes an output pole base and a mounting bracket. The limiting protrusion 23 is arranged on the inner side of the insulating layer 21.

[0101] Among them, the insulating part 20 is injection molded on the expansion beam body 10 through an injection molding process, and the specific processing steps include: designing an injection mold with a connecting part 22; placing the expanded beam body 10 with a limiting groove 13 after processing into the injection mold; using resin material and injection molding with the expansion beam body 10 as a substrate; processing a composite expansion beam 100 that is a combination of an insulating layer 21, a connecting part 22 and a limiting protrusion 23, wherein the limiting protrusion 23 is located in the limiting groove 13, and the insulating layer 21 and the connecting part 22 are integrally injection molded on the surface of the expansion beam body 10; through the cooperation of the limiting protrusion 23 and the limiting groove 13, the insulating part 20 and the expansion beam body 10 are tightly connected as a whole, and the insulating part 20 is formed into an integral part by injection molding.

[0102] The thickness of the insulating layer 21 is greater than 0.1 mm, so that the expansion beam 100 has insulating properties. The design of the insulating layer 21 can also enhance the strength of the expansion beam 100. There is no need to additionally adhere insulating film, thereby reducing the quality risk of loose adhesion; and the process of separately connecting the connector 22 to the expansion beam body 10 is eliminated, thereby simplifying the assembly process, improving production efficiency, reducing costs, and reducing the quality risk of missing or wrong installation.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An expansion beam, characterized in that: include: Expansion beam body; The insulating member comprises an insulating layer and at least one connecting member, wherein the insulating layer is arranged on the outside of the expansion beam body, and the connecting member is arranged on a side of the insulating layer away from the expansion beam body, and the insulating member is an integrally formed member.

2. The expansion beam according to claim 1, characterized in that: The insulating member further comprises a limiting protrusion, which is arranged on a side of the insulating layer facing the expansion beam body. The outer surface of the expansion beam body has an inwardly recessed limiting groove, and the limiting protrusion cooperates with the limiting groove.

3. The expansion beam according to claim 2, characterized in that: The slot width of at least a portion of the limiting slot gradually decreases along a direction approaching an opening of the limiting slot.

4. The expansion beam according to claim 2, characterized in that: The expansion beam body extends along a first direction, and the limiting groove extends along the first direction.

5. The expansion beam according to claim 4, characterized in that: The cross-sectional shape of the limiting groove perpendicular to the first direction is a trapezoid.

6. The expansion beam according to claim 2, characterized in that: The limiting grooves include a plurality of grooves, and at least two of the limiting grooves have opening directions different from each other.

7. The expansion beam according to claim 1, characterized in that: The expansion beam body has a first side and a second side connected to the first side, the insulation layer includes a first part and a second part, the first part cooperates with the first side of the expansion beam body, the second part cooperates with the second side of the expansion beam body, and the second part is provided with at least one connecting member.

8. The expansion beam according to claim 1, characterized in that: The insulating layer is annular and wraps at least a portion of the expansion beam body.

9. The expansion beam according to claim 1, characterized in that: The connecting member has a connecting hole and / or a connecting groove, and the connecting member is used to connect the structural members of the battery.

10. The expansion beam according to claim 1, characterized in that: The insulating member is injection molded on the expansion beam body.

11. The expansion beam according to claim 1, characterized in that: The insulating member includes a plastic member.

12. The expansion beam according to any one of claims 1 to 11, characterized in that: The expansion beam body comprises an outer frame, the outer frame extends along a first direction and forms a cavity, and the insulation layer is arranged on the outer side of the outer frame.

13. The expansion beam according to claim 12, characterized in that: The expansion beam body further includes: reinforcing ribs, which are arranged in the cavity and connected to the inner side of the outer frame.

14. A battery, characterized in that: Comprising the expansion beam according to any one of claims 1-13.

15. An electrical device, characterized in that: Comprising a battery according to claim 14.

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