CN220456573U - Layering subassembly, battery and power consumption device - Google Patents

Abstract

The embodiment of the application provides a layering subassembly, battery and power consumption device, layering subassembly installs in the battery, and the battery includes battery monomer and restriction battery monomer inflation's spacing roof beam, and layering subassembly includes layering and at least one mounting. The pressing strip is provided with a first surface and a second surface which are oppositely arranged, the first surface is used for facing the end face of the battery cell, which is provided with the electrode terminal, and the pressing strip extends along a first direction and is provided with a first end and a second end which are oppositely arranged along the first direction; the fixing piece comprises a limiting space and a first side wall facing the limiting space, wherein the first end is limited in the limiting space and abuts against the inner wall surface of the first side wall along the direction from the first end to the second end, the limiting space forms a space for the first end to move along the inner wall surface of the first side wall in the second direction, and the second direction is parallel to the arrangement direction from the first surface to the second surface. The application can improve the service life of the battery monomer.

Description

Layering subassembly, battery and power consumption device

Technical Field

The present application relates to the field of battery technology, and more particularly, to a molding assembly, a battery, and an electrical device.

Background

Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like.

In the development of battery technology, how to improve the service life of a battery cell is one research direction in battery technology.

Disclosure of Invention

The application provides a layering subassembly, battery and power consumption device, it can improve battery monomer's life.

The embodiment of the application provides a layering subassembly, installs in the battery, and the battery includes battery monomer and restriction battery monomer inflation's spacing roof beam, and layering subassembly includes layering and at least one mounting. The pressing strip is provided with a first surface and a second surface which are oppositely arranged, the first surface is used for facing the end face of the battery cell, which is provided with the electrode terminal, and the pressing strip extends along a first direction and is provided with a first end and a second end which are oppositely arranged along the first direction; the fixing piece comprises a limiting space and a first side wall facing the limiting space, wherein the first end is limited in the limiting space and abuts against the inner wall surface of the first side wall along the direction from the first end to the second end, the limiting space forms a space for the first end to move along the inner wall surface of the first side wall in the second direction, and the second direction is parallel to the arrangement direction from the first surface to the second surface.

In the above technical scheme, when the distance between the surface of the battery monomer and the top end face of the limiting beam in the height direction, namely the distance along the second direction, is inconsistent with the preset distance, the fixing piece can move along the second direction relative to the pressing strip and is fixed with the limiting beam, so that the bending degree of the pressing strip is reduced, namely the height difference between at least one end of the pressing strip and the middle area in the second direction is reduced, the stripping force borne by the pressing strip is also reduced, the bonding effect of the pressing strip and the battery monomer is improved, namely the limiting effect of the pressing strip on the expansion of the battery monomer is improved, and the service life of the battery monomer is prolonged.

In some embodiments, the pressing strip comprises a strip body and a clamping part, the clamping part is arranged at least one end of the strip body in the first direction and protrudes out of at least one side of the strip body in the third direction, the clamping part is limited in the limiting space and abuts against the first side wall, and the first direction, the second direction and the third direction are intersected in pairs.

In the above technical scheme, set up the clamping part for the clamping part is protruding in the strip body along the third direction, so set up, can make the juncture of strip body and clamping part have higher structural strength, reduce the possibility of fracture separation of clamping part and strip body at the in-process of battery cell inflation, improve the operational reliability of layering subassembly.

In some embodiments, the locking portion protrudes from two opposite sides of the strip body in the third direction, the first side wall is provided with an avoiding portion for the strip body to move along the second direction, and two opposite ends of the locking portion along the third direction are abutted against the first side wall.

In the above technical scheme, the structure strength of the clamping part is further improved, the possibility of fracture of the clamping part is further reduced, and the reliability of abutting of the clamping part and the first side wall is also improved.

In some embodiments, the number of the fixing members is two, the first end is limited on one fixing member, the second end is limited on the other fixing member, and the second end abuts against the first side wall of the other fixing member along the direction from the second end to the first end and can move along the inner wall surface of the first side wall in the second direction.

In the technical scheme, the two ends of the pressing strip are connected to the limiting beam through the fixing piece, and the heights of the two ends of the pressing strip can be closer to the height of the middle area through the adjustment of the fixing piece, so that the bending degree of the pressing strip is further reduced, the stripping force borne by the pressing strip is reduced, the bonding effect of the pressing strip and the battery monomer is further improved, namely the limiting effect of the pressing strip on the expansion of the battery monomer is improved, and the service life of the battery monomer is prolonged.

In some embodiments, the fixing member includes a top wall and a plurality of side walls connected to the top wall, the top wall and the plurality of side walls enclose to form a limiting space, the plurality of side walls include a first side wall, and the plurality of side walls enclose to form a first opening for the first end to enter the limiting space.

In the technical scheme, the first end can conveniently enter the fixing piece from the first opening, namely the lower side, and the assembly of the pressing strip and the fixing piece is convenient.

In some embodiments, the plurality of side walls includes a second side wall disposed opposite the first side wall along the first direction, the second side wall being configured to connect to one side of the spacing Liang Beili cell.

In the technical scheme, the fixing piece and the limiting beam can be conveniently connected. Moreover, when the battery monomer expands and the distance between the two limiting beams is in a trend of being enlarged, the limiting beams can transmit tension to the pressing strip through the second side wall and the first side wall, so that the pressing strip can provide reaction force for the limiting beams through the first side wall and the second side wall, the distance between the two limiting beams is reduced, the expansion of the battery monomer is effectively limited, the first side wall and the second side wall bear main stress in the process, the second side wall and the limiting beams are propped against along the first direction, and therefore the connection between the fixing piece and the limiting beams is not easy to fail, and the reliability is high.

In some embodiments, the bead assembly further includes a fastener configured to pass through the second sidewall in the first direction and connect with the spacing beam.

In the technical scheme, the second side wall is connected with the limiting beam through the fastener, so that the connection is convenient and the connection strength is high. Also, the fastener is primarily subjected to compressive forces in the first direction rather than shear forces and is therefore not prone to damage.

In some embodiments, the plurality of side walls includes a third side wall and a fourth side wall disposed opposite along a third direction, the third side wall and the fourth side wall are connected to the first side wall and the second side wall, and the first direction, the second direction, and the third direction intersect one another.

In the above technical scheme, setting up third lateral wall and fourth lateral wall, can further strengthen the structural strength that first lateral wall and second lateral wall are connected, reduce the deformation of first lateral wall and second lateral wall in the use, and then improve the restriction effect to battery monomer inflation, improve battery monomer's life.

In some embodiments, the molding assembly further includes an elastic member positioned in the spacing space, one end of the elastic member in the second direction being connected to the top wall, the other end being connected to the first end, the elastic member being configured to be compressed between the top wall and the first end in the second direction.

In the technical scheme, the elastic piece is arranged, and the pressure along the second direction is applied to the top wall and the pressing strip through the elastic piece, so that the pressing strip is tightly attached to the surface of the battery cell, the bonding effect of the battery cell and the pressing strip is improved, and the limiting effect of the pressing strip on the expansion of the battery cell is improved.

In some embodiments, the elastic member is a spring, and opposite ends of the spring along the second direction are abutted against the top wall and the pressing strip one by one.

In the technical scheme, the elastic piece is set to be a spring, the compression stroke of the spring is larger, and the moving range of the pressing strip in the limiting space along the second direction is improved, so that the adjusting range of the pressing strip assembly is improved, and the applicability of the pressing strip assembly is improved.

In some embodiments, the top wall is provided with a first limiting hole, and one end of the elastic piece in the second direction is accommodated in the first limiting hole; and/or the layering is provided with a second limiting hole, and the other end of the elastic piece in the second direction is accommodated in the second limiting hole.

In the technical scheme, the first limiting hole and/or the second limiting hole are/is arranged, and the end part of the elastic piece can be limited by the first limiting hole and/or the second limiting hole, so that the possibility of failure of the elastic piece due to position deviation is reduced.

In some embodiments, the molding assembly further includes a cover plate coupled to an end of the at least one sidewall facing away from the top wall and closing at least a portion of the first opening, the first end being trapped between the top wall and the cover plate.

In the technical scheme, the guard board is arranged to close at least part of the first opening, the pressing strip is limited between the top wall and the guard board, and the pressing strip can be prevented from falling off from the first opening, so that the pressing strip assembly is an integral component and cannot disintegrate at any time, and the installation, the transportation, the storage and the like are facilitated.

In some embodiments, the bead assembly further includes an insulating member coupled to opposite sides of the bead in the third direction and to the second surface and configured to electrically isolate the bead from the battery cell, the first direction, the second direction, and the third direction intersecting one another.

In the technical scheme, the insulating piece is arranged to electrically isolate the layering and the battery monomers, so that the creepage distance and the electric gap between the battery monomers and the layering meet the requirements, the risk of short circuit of a plurality of battery monomers connected with the layering is reduced, and the use reliability of the layering assembly is improved.

In a second aspect, an embodiment of the present application further provides a battery, including a case, a plurality of battery cells, and the bead assembly described above, where the case includes two spacing beams arranged along a first direction; the battery monomers are arranged between the two limiting beams; the layering is connected in the terminal surface that a plurality of battery monomers that arrange along first direction were equipped with electrode terminal, and the mounting is connected in the top surface of spacing roof beam.

In a third aspect, an embodiment of the present application further provides an electrical device, including the above battery, where the battery is configured to provide electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

FIG. 3 is a schematic view of a molding assembly according to some embodiments of the present application;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

FIG. 5 is a schematic view of the molding assembly of FIG. 3 at another angle;

FIG. 6 is a partially exploded view of the molding assembly of FIG. 5;

FIG. 7 is an enlarged view at C in FIG. 6;

FIG. 8 is a schematic view of the fixing member shown in FIG. 7;

FIG. 9 is a schematic view of another construction of a molding assembly provided in some embodiments of the present application;

Fig. 10 is an enlarged view at B in fig. 4.

Reference numerals of the specific embodiments are as follows:

1. a vehicle; 2. a battery; 3. a controller; 4. a motor; 5. a battery cell; 51. an electrode terminal; 6. a case; 61. a cover body; 62. a base; 63. a limit beam; 7. a batten assembly;

71. pressing strips; 711. a first surface; 712. a second surface; 713. a first end; 714. a second end; 715. a strip body; 716. a locking part; 717. a second limiting hole;

72. a fixing member; 721. a limit space; 722. a first sidewall; 7221. an avoidance unit; 723. a top wall; 7231. a first limiting hole; 724. a second sidewall; 725. a third sidewall; 726. a fourth sidewall; 727. a first opening;

73. an elastic member;

74. a guard board;

75. an insulating member;

76. a fastener;

x, a first direction; y, second direction; z, third direction.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and in the interest of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.

The term "plurality" as used herein refers to more than two (including two).

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. Taking a lithium ion battery monomer as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The battery generally includes the box and sets up a plurality of battery monomer in the box, and a plurality of battery monomer are located between two spacing roof beams of box, and the free degree of expansion of battery receives the restriction of two spacing roof beams.

In order to further reduce the expansion size of the battery cells in the thickness direction of the battery cells, a pressing strip is generally required to be stuck on the surfaces of the electrode terminals of the battery cells, two ends of the pressing strip are fastened on the limiting beam in a bolt locking mode, and the expansion size of the battery cells is further limited through the pressing strip, so that the service life of the battery cells is prolonged.

Because of the existence of manufacturing tolerance, the distance between the surface of the battery monomer and the end face of the top end of the limiting beam is possibly inconsistent with the preset distance, so that after the pressing strip is fixed on the limiting beam, the two ends of the pressing strip and the middle area are provided with height differences, the pressing strip is enabled to be subjected to upward stripping force due to the existence of the height differences, and the pressing strip is easily stripped from the surface of the battery monomer to cause bonding failure, so that the limiting effect of the pressing strip on the expansion of the battery monomer is weakened, and the service life of the battery monomer is shortened.

Illustratively, after the bead is locked to the retention beam, if the ends of the bead are lower than the middle region, the middle region of the bead may be subjected to a peeling force, thereby failing in adhesion with the surface of the battery cell. If the two ends of the pressing strip are higher than the middle area, after the battery monomer expands, the distance between the limiting beams at the two sides is increased, the pressing strip is tensioned, and the middle area of the pressing strip is acted by stripping force, so that the surface adhesion of the pressing strip and the battery monomer fails.

In view of this, this application provides a layering subassembly, it is through setting up the mounting for at least one end of layering can also follow the second direction when the battery monomer expansion direction is spacing remove, layering and mounting can follow the direction of height relative movement, in this way, when the spacing of battery monomer surface and spacing roof beam top terminal surface promptly both along the distance of second direction is inconsistent with the default distance, the mounting can remove and fix with spacing roof beam along the second direction for the layering, thereby reduced the crooked degree of layering, the difference in height of at least one end of layering and middle zone in the second direction has been reduced, just also reduced the peel force that the layering received, thereby improve layering and battery monomer's bonding effect, improve the restriction of layering to battery monomer expansion promptly, battery monomer's life has been prolonged.

The battery cell described in the embodiments of the present application is suitable for a battery and an electric device using the battery.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.

As shown in fig. 1, the interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the present application, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

Fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application; fig. 3 is a schematic structural view of a molding assembly according to some embodiments of the present application.

As shown in fig. 2 and 3, the battery 2 includes a case 6, a plurality of battery cells 5, and a molding assembly 7, the case 6 includes two stopper beams 63 arranged in the first direction X, and the plurality of battery cells 5 are disposed between the two stopper beams 63. The bead 71 is connected to the end surface of the plurality of battery cells 5 arranged in the first direction X where the electrode terminals 51 are provided, and the fixing member 72 is connected to the top surface of the stopper beam 63.

By way of example, the case 6 may take a variety of configurations. In some embodiments, the case 6 may include a cover 61 and a base 62, the cover 61 and the base 62 being covered with each other, the cover 61 and the base 62 together defining a receiving space for receiving the battery cell 5. The base 62 may have a hollow structure with an opening at one end, the cover 61 may have a plate-like structure, and the cover 61 covers the opening side of the base 62, so that the cover 61 and the base 62 together define an accommodating space; the cover 61 and the base 62 may be hollow structures each having one side open, and the open side of the cover 61 may be closed to the open side of the base 62.

The plurality of battery cells 5 can be connected in series or in parallel, and the series-parallel connection refers to that the plurality of battery cells 5 are connected in series or in parallel. The plurality of battery cells 5 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 5 is fixed on the box 6; of course, a plurality of battery cells 5 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form a whole and fixed to the case 6.

The limiting beam 63 in this embodiment may be a side beam of the box 6, that is, a beam of the box 6 located around, or a beam disposed in an accommodating space formed by the box 6. Optionally, the box 6 includes a bottom wall, four side beams and two limiting beams 63, where the four side beams and the bottom wall enclose to form a containing space, and the two limiting beams 63 are disposed in the containing space along the first direction X at intervals.

The first direction X in the embodiment of the present application is the direction in which the battery cell 5 expands.

The number of the beads 71 may be one or a plurality. The bead 71 may be disposed on an end surface between the two electrode terminals 51 of the battery cells 5, or may be disposed at a boundary between two adjacent battery cells 5 in the third direction Z to simultaneously limit expansion of the two rows of battery cells 5. When the number of the beads 71 is plural, the plural beads 71 are arranged at intervals in the third direction Z. Wherein the third direction Z intersects the first direction X.

The bead 71 of the present embodiment may be directly connected to the surface of the battery cell 5, for example, by adhesion, or may be indirectly adhered to the surface of the battery cell 5 through other structures. The bead 71, through connection with the battery cells 5, forms a restraining effect on expansion of the plurality of battery cells 5 connected.

The number of the fixing pieces 72 may be one or two, and the two fixing pieces 72 are disposed at two ends of the compression bar 71 and are connected to the two limiting beams 63 one by one. The fixing member 72 in this embodiment may be connected to the top surface of the limiting beam 63 by abutting or welding. The top surface of the limiting beam 63 refers to the end surface of the limiting beam 63, which faces away from the bottom wall of the box 6.

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3; FIG. 5 is a schematic view of the molding assembly of FIG. 3 at another angle; FIG. 6 is a partially exploded view of the molding assembly of FIG. 5; fig. 7 is an enlarged view at C in fig. 6.

As shown in fig. 4-7, the present application also provides a molding assembly 7 for installation in a battery 2, the battery 2 including a battery cell 5 and a spacing beam 63 for limiting expansion of the battery cell 5, the molding assembly 7 including a molding 71 and at least one fixture 72. The bead 71 has a first surface 711 and a second surface 712 disposed opposite to each other, the first surface 711 being for facing an end surface of the battery cell 5 where the electrode terminal 51 is provided, the bead 71 extending in the first direction X and having a first end 713 and a second end 714 opposite to each other in the first direction X. The fixing member 72 includes a first side wall 722 facing the limiting space 721, the first end 713 is limited in the limiting space 721 and abuts against an inner wall surface of the first side wall 722 along a direction from the first end 713 to the second end 714, and the limiting space 721 forms a space in which the first end 713 moves along the inner wall surface of the first side wall 722 in a second direction Y, which is parallel to an arrangement direction of the first surface 711 to the second surface 712.

The molding 71 of the embodiment of the present application may be a metal material or an insulating composite material. The shape of the cross section of the bead 71 in the first direction X may be rectangular, trapezoidal or other shape.

The number of the fixing members 72 in the embodiment of the present application may be one or two, and the two fixing members 72 are disposed at opposite ends of the compression bar 71 in the first direction X.

In actual installation, the first side wall 722 of the embodiment of the present application is connected to the top surface of the spacing beam 63, and may be directly connected to the top surface of the spacing beam 63 or indirectly connected to the top surface of the spacing beam. Specifically, the first side wall 722 is located above the stopper beam 63, i.e., on the side facing away from the bottom wall of the case 6.

The inner wall surface of the first sidewall 722 in the embodiment of the present application refers to a surface of the first sidewall 722 facing the limiting space 721.

The fixing member 72 of the embodiment of the present application is formed with a limiting space 721 for the movement of the first end 713, and the first end 713 moves in the limiting space 721 along the second direction X.

The fixing member 72 of the present embodiment may include a first sidewall 722, a second sidewall, and a connecting rod, where the first sidewall 722 and the second sidewall are disposed opposite along a first direction X, and the connecting rod is connected to upper ends of the first sidewall 722 and the second sidewall, and a spacing space 721 is formed between the first sidewall 722 and the second sidewall.

The bead 71 of the present embodiment may be formed with a notch at the junction between the first end 713 and the middle area, where the notch is formed on at least one side of the bead 71 in the third direction Z, and the first side wall 722 passes through the notch, so that the first end 713 is limited in the limiting space 721.

Alternatively, the first direction X and the second direction Y are perpendicular.

In the use state, the first direction X is the expansion direction of the battery cell 5, and the second direction Y is the height direction of the battery cell 5. In assembly, the bead 71 may be adhered to the surface of the battery cell 5, and then the fixing member 72 is moved in the second direction Y, and then the fixing member 72 is fixed to the limiting beam 63.

According to the batten assembly 7, the fixing piece 72 is arranged, so that at least one end of the batten 71 can move in the second direction Y along the first side wall 722 while being limited in the first direction X, namely, the batten 71 and the fixing piece 72 can move relatively in the height direction, when the distance between the surface of the battery cell 5 and the top end face of the limiting beam 63 in the height direction, namely, the distance along the second direction Y, is inconsistent with the preset distance, the fixing piece 72 can move in the second direction Y relative to the batten 71 and is fixed with the limiting beam 63, the bending degree of the batten 71 is reduced, namely, the height difference between at least one end of the batten 71 and the middle area in the second direction Y is reduced, namely, the peeling force borne by the batten 71 is reduced, so that the bonding effect of the batten 71 and the battery cell 5 is improved, namely, the limiting effect of the batten 71 on the expansion of the battery cell 5 is improved, and the service life of the battery cell 5 is prolonged.

In some embodiments, the molding 71 includes a strip body 715 and a locking portion 716, the locking portion 716 is disposed at least one end of the strip body 715 in the first direction X and protrudes from at least one side of the strip body 715 in the third direction Z, the locking portion 716 is limited in the limiting space 721 and abuts against the first side wall 722, and the first direction X, the second direction Y and the third direction Z intersect two by two.

The cross-section of the strip body 715 of the embodiments of the present application in the first direction X may be rectangular, trapezoidal, or other shape.

The locking portion 716 in the embodiment of the present application may protrude from one side of the strip body 715 in the third direction Z, or may protrude from two opposite sides of the strip body 715 in the third direction Z.

The surface of the locking portion 716 facing the battery cell 5 and the surface of the strip body 715 facing the battery cell 5 in the embodiment of the present application may be in the same plane or may be in different planes. Illustratively, the surface of the locking portion 716 facing the battery cell 5 is higher than the surface of the strip body 715 facing the battery cell 5.

Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The strip body 715 and the locking portion 716 according to the embodiment of the present application may be integrally formed or welded.

The clamping part 716 is arranged, so that the clamping part 716 protrudes out of the strip body 715 along the third direction Z, the arrangement is that the junction of the strip body 715 and the clamping part 716 has higher structural strength, the possibility of fracture and separation of the clamping part 716 and the strip body 715 in the process of expanding the battery cell 5 is reduced, and the use reliability of the pressing strip assembly 7 is improved.

Fig. 8 is a schematic structural view of the fixing member in fig. 7.

As shown in fig. 8, in some embodiments, the locking portion 716 protrudes from opposite sides of the strip body 715 in the third direction Z, and the first side wall 722 is provided with a avoiding portion 7221 for moving the strip body 715 along the second direction Y, and opposite ends of the locking portion 716 along the third direction Z are abutted against the first side wall 722.

The escape portion 7221 in the embodiment of the present application penetrates the first side wall 722 in the first direction X. Alternatively, the escape portion 7221 is located at an intermediate region of the first side wall 722 in the third direction Z. The strip body 715 passes through the escape portion 7221, so that opposite ends of the locking portion 716 in the third direction Z abut against the first side wall 722.

By this arrangement, the structural strength of the locking portion 716 is further improved, the possibility of breakage of the locking portion 716 is further reduced, and the reliability of abutment of the locking portion 716 with the first side wall 722 is also increased.

In some embodiments, the number of the fixing members 72 is two, the first end 713 is limited to one of the fixing members 72, the second end 714 is limited to the other fixing member 72, and the second end 714 abuts against the first sidewall 722 of the other fixing member 72 along the direction from the second end 714 to the first end 713 and is capable of moving along the inner wall surface of the first sidewall 722 in the second direction Y.

The number of the fixing pieces 72 is two, so that two ends of the pressing strip 71 are connected to the limiting beam 63 through the fixing pieces 72, and the heights of the two ends of the pressing strip 71 are closer to the height of the middle area through adjustment of the fixing pieces 72, so that the bending degree of the pressing strip 71 is further reduced, the stripping force borne by the pressing strip 71 is reduced, the bonding effect of the pressing strip 71 and the battery monomer 5 is further improved, namely the limiting effect of the pressing strip 71 on expansion of the battery monomer 5 is improved, and the service life of the battery monomer 5 is prolonged.

In some embodiments, the fixing member 72 includes a top wall 723 and a plurality of side walls connected to the top wall 723, the top wall 723 and the plurality of side walls enclosing to form a limiting space 721, the plurality of side walls including a first side wall 722, the plurality of side walls enclosing to form a first opening 727 for the first end 713 to enter the limiting space 721.

The top wall 723 of the present embodiment is located on the side of the bead 71 facing away from the stop beam 63. The first opening 727 of the embodiment of the present application is opposite the top wall 723 in the second direction Y. In the use state, the top wall 723 is located on the upper side and the first opening 727 is located on the lower side.

The side walls of the embodiments of the present application are connected at an angle to the top wall 723. Alternatively, the side walls are disposed perpendicularly to the top wall 723. The side walls, top wall 723 of embodiments of the present application may be plate-like, block-like, or other shapes, respectively.

Optionally, the shape of the first opening 727 matches the shape of the first end 713.

So configured, the first end 713 may facilitate access to the fixing member 72 from the first opening 727, i.e., the lower side, facilitating assembly of the molding 71 and the fixing member 72.

In some embodiments, the plurality of side walls includes a second side wall 724, the second side wall 724 is disposed opposite to the first side wall 722 along the first direction X, and the second side wall 724 is used to connect a side of the spacing beam 63 facing away from the battery cell 5.

The second side wall 724 and the side of the limiting beam 63 facing away from the battery cell 5 in the embodiment of the present application may be connected by threaded connection or riveting. Specifically, the first sidewall 722 of the embodiment of the present application is located above the stop beam 63, and the second sidewall 724 is located on one side of the stop beam in the first direction X.

The second side wall 724 is connected to the side of the limiting beam 63 away from the battery unit 5, so that the fixing piece 72 and the limiting beam 63 can be conveniently connected. Moreover, when the battery cell 5 expands to make the distance between the two limiting beams 63 tend to be larger, the limiting beams 63 can transmit the tensile force to the pressing strip 71 through the second side wall 724 and the first side wall 722, so that the pressing strip 71 provides the reactive force to the limiting beams 63 through the first side wall 722 and the second side wall 724 again, the distance between the two limiting beams 63 is reduced, the expansion of the battery cell 5 is effectively limited, the first side wall 722 and the second side wall 724 bear the main stress in the process, and the second side wall 724 and the limiting beams 63 are propped against each other along the first direction X, so that the connection between the fixing piece 72 and the limiting beams 63 is not easy to fail, and the reliability is high.

Fig. 9 is a schematic view of another construction of a molding assembly according to some embodiments of the present application.

Referring to fig. 9, in some embodiments, the molding assembly 7 further includes a fastener 76, the fastener 76 being configured to pass through the second sidewall 724 in the first direction X and connect with the stop beam 63.

The fasteners 76 of the present embodiments may be bolt assemblies, rivets, or the like.

Optionally, a fastener 76 passes through the second side wall 724 and the stopper beam 63 in order from the side of the stopper beam 63 facing away from the battery cell 5 to connect the two.

The second side wall 724 and the limit beam 63 are connected by the fastener 76, so that the connection is convenient and the connection strength is high. Also, the fastener 76 is mainly subjected to a pressing force in the first direction X rather than a shearing force, and thus is not easily damaged.

In some embodiments, the plurality of sidewalls includes a third sidewall 725 and a fourth sidewall 726 disposed opposite along the third direction Z, the third sidewall 725 and the fourth sidewall 726 are connected to the first sidewall 722 and the second sidewall 724, and the first direction X, the second direction Y, and the third direction Z intersect two by two.

Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The third sidewall 725 of the present embodiment is connected to the first sidewall 722 and the second sidewall 724, and the fourth sidewall 726 is connected to the first sidewall 722 and the second sidewall 724. Optionally, opposite ends of the third sidewall 725 along the first direction X are connected to the first sidewall 722 and the second sidewall 724 one by one, and opposite ends of the fourth sidewall 726 along the first direction X are connected to the first sidewall 722 and the second sidewall 724 one by one.

The third sidewall 725 and the first sidewall 722 and the second sidewall 724 of the present embodiment may be integrally formed or welded, and the fourth sidewall 726 and the first sidewall 722 and the second sidewall 724 may be integrally formed or welded.

By arranging the third side wall 725 and the fourth side wall 726, the structural strength of the connection between the first side wall 722 and the second side wall 724 can be further enhanced, the deformation of the first side wall 722 and the second side wall 724 in the use process is reduced, the limiting effect on the expansion of the battery cell 5 is further improved, and the service life of the battery cell 5 is prolonged.

Fig. 10 is an enlarged view at B in fig. 4.

Referring to fig. 7, 8 and 10, in some embodiments, the molding assembly 7 further includes an elastic member 73, the elastic member 73 is located in the limiting space 721, one end of the elastic member 73 in the second direction Y is connected to the top wall 723, the other end is connected to the first end 713, and the elastic member 73 is configured to be compressed between the top wall 723 and the first end 713 along the second direction Y.

The elastic member 73 of the present embodiment refers to a member having a certain elastic force, capable of being deformed by an external force, and recovering at least a part of the deformation after the external force is removed. Since the resilient member 73 is compressed, the resilient member applies pressure to both the top wall 723 and the first end 713.

The elastic member 73 may be a spring, or may be an elastic strip or block made of rubber, silicone, or the like.

One end of the elastic member 73 in the second direction Y may be connected to the top wall 723 by abutment or welding, and the other end may be connected to the first end 713 by abutment or welding.

The elastic member 73 is arranged, and the pressure along the second direction Y is applied to the top wall 723 and the pressing strip 71 through the elastic member 73, so that the pressing strip 71 is tightly attached to the surface of the battery cell 5, the bonding effect of the battery cell 5 and the pressing strip 71 is improved, and the limiting effect of the pressing strip 71 on the expansion of the battery cell 5 is improved.

In some embodiments, the elastic member 73 is a spring, and opposite ends of the spring along the second direction Y are abutted against the top wall 723 and the pressing bar 71 one by one.

The elastic member 73 is configured as a spring, and the compression stroke of the spring is larger, which is helpful to increase the moving range of the compression bar 71 in the limiting space 721 along the second direction Y, thereby increasing the adjusting range of the compression bar assembly 7 and increasing the applicability of the compression bar assembly 7.

In some embodiments, the top wall 723 is provided with a first limiting hole 7231, and one end of the elastic member 73 in the second direction Y is received in the first limiting hole 7231; and/or the pressing bar 71 is provided with a second limiting hole 717, and the other end of the elastic member 73 in the second direction Y is accommodated in the second limiting hole 717.

When the top wall 723 and the bead 71 have both the first and second stopper holes 7231 and 717, the first and second stopper holes 7231 and 717 are disposed opposite to each other.

The first limiting hole 7231 and/or the second limiting hole 717 are provided, and the first limiting hole 7231 and/or the second limiting hole 717 can limit the end of the elastic member 73, thereby reducing the possibility of failure of the elastic member 73 due to positional deviation.

In some embodiments, the molding assembly 7 further includes a cover 74, the cover 74 being attached to an end of the at least one sidewall facing away from the top wall 723 and closing at least a portion of the first opening 727, the first end 713 being trapped between the top wall 723 and the cover 74.

The shield 74 may be attached to one end of one side wall facing away from the top wall 723 or may be attached to one end of a plurality of side walls facing away from the top wall 723.

Illustratively, the top wall 723 and the skirt 74 may be threaded or riveted or the like such that the lower ends of the side walls abut the skirt 74. The guard 74 may be welded or bonded to the lower end of the side wall.

Optionally, the shield 74 closes the entire first opening 727.

The guard 74 is provided to close at least a portion of the first opening 727 and to retain the bead 71 between the top wall 723 and the guard 74, preventing the bead 71 from falling out of the first opening 727, so that the bead assembly 7 is an integral component and does not disintegrate at any time, thereby facilitating installation, transportation, storage, etc.

In some embodiments, the molding assembly 7 further includes an insulating member 75, wherein the insulating member 75 is connected to opposite sides of the molding 71 along the third direction Z and the second surface 712, and is configured to electrically isolate the molding 71 from the battery cell 5, and the first direction X, the second direction Y, and the third direction Z intersect each other.

The insulating member 75 of the embodiment of the present application may be a film structure or a stripe structure, or the like. It can be made of plastic material, insulating composite material or rubber material. The bead 71 of the present embodiment employs a conductive material.

Specifically, the insulating members 75 are connected to opposite sides of the bead 71 in the third direction Z to electrically isolate the electrode terminals 51 from the bead 71. An insulator 75 is attached to the second surface 712 to electrically isolate the bead 71 from the housing of the battery cell 5.

The insulator 75 and the bead 71 of the present embodiment may be integrally connected by gluing, injection molding, or the like.

The insulating member 75 of the present embodiment may form a groove structure, and wrap around both sides and the bottom side of the strip body 715 opposite to each other along the third direction Z. The insulating member 75 may also have a tubular structure and wrap around the strip body 715.

Optionally, the insulator 75 extends along the first direction X throughout the strip body 715.

Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The insulating piece 75 is arranged to electrically isolate the pressing strip 71 and the battery cells 5, so that the creepage distance and the electric gap between the battery cells 5 and the pressing strip 71 made of metal materials meet the requirements, the risk of short circuit of a plurality of battery cells 5 connected with the pressing strip 71 is reduced, and the use reliability of the pressing strip assembly 7 is improved.

The embodiment of the application also provides a battery 2, and the battery 2 includes a box 6, a plurality of battery monomers 5 and foretell layering subassembly 7, and box 6 includes two spacing roof beams 63 of arranging along first direction X, and a plurality of battery monomers 5 set up between two spacing roof beams 63. The bead 71 is connected to the end surface of the plurality of battery cells 5 arranged in the first direction X where the electrode terminals 51 are provided, and the fixing member 72 is connected to the top surface of the stopper beam 63.

The embodiment of the application also provides an electricity utilization device, which comprises the battery 2, wherein the battery 2 is used for providing electric energy.

Referring to fig. 2-10, the present embodiment provides a molding assembly 7, which is installed in a battery 2, the battery 2 includes a battery cell 5 and a limiting beam 63 for limiting expansion of the battery cell 5, and the molding assembly 7 includes a molding 71 and at least one fixing member 72. The bead 71 has a first surface 711 and a second surface 712 disposed opposite to each other, the first surface 711 being for facing an end surface of the battery cell 5 where the electrode terminal 51 is provided, the bead 71 extending in the first direction X and having a first end 713 and a second end 714 opposite to each other in the first direction X. The fixing member 72 includes a limiting space 721 and a first side wall 722 facing the limiting space 721, the first side wall 722 is used for connecting the top surface of the limiting beam 63, the first end 713 is limited in the limiting space 721 and abuts against the inner wall surface of the first side wall 722 along the direction from the first end 713 to the second end 714, the limiting space 721 forms a space for the first end 713 to move along the inner wall surface of the first side wall 722 in a second direction Y, and the second direction Y is parallel to the arrangement direction of the first surface 711 to the second surface 712. The pressing strip 71 comprises a strip body 715 and a locking part 716, the locking part 716 is arranged at least one end of the strip body 715 in the first direction X and protrudes out of at least one side of the strip body 715 in the third direction Z, the locking part 716 is limited in the limiting space 721 and abuts against the first side wall 722, and the first direction X, the second direction Y and the third direction Z are intersected in pairs. The locking part 716 protrudes from two opposite sides of the strip body 715 in the third direction Z, the first side wall 722 is provided with an avoidance part 7221 for the strip body 715 to move along the second direction Y, and two opposite ends of the locking part 716 along the third direction Z are abutted against the first side wall 722. The number of the fixing members 72 is two, the first end 713 is limited to one of the fixing members 72, the second end 714 is limited to the other fixing member 72, and the second end 714 abuts against the first side wall 722 of the other fixing member 72 along the direction from the second end 714 to the first end 713 and can move along the inner wall surface of the first side wall 722 in the second direction Y. The fixing member 72 includes a top wall 723 and a plurality of side walls connected to the top wall 723, the top wall 723 and the plurality of side walls enclose a limiting space 721, the top wall 723 is located at a side of the compression bar 71 facing away from the limiting beam 63, the plurality of side walls include a first side wall 722, and the plurality of side walls enclose a first opening 727 for the first end 713 to enter the limiting space 721. The plurality of side walls include a second side wall 724, the second side wall 724 is disposed opposite to the first side wall 722 along the first direction X, and the second side wall 724 is used for connecting a side of the limiting beam 63 facing away from the battery cell 5. The molding assembly 7 further includes a fastener 76, the fastener 76 being configured to pass through the second sidewall 724 in the first direction X and to connect with the stop beam 63. The plurality of sidewalls includes a third sidewall 725 and a fourth sidewall 726 disposed opposite along the third direction Z, the third sidewall 725 and the fourth sidewall 726 being connected to the first sidewall 722 and the second sidewall 724. The molding assembly 7 further includes an elastic member 73, the elastic member 73 being located in the limiting space 721, one end of the elastic member 73 being connected to the top wall 723 in the second direction Y, the other end being connected to the first end 713, the elastic member 73 being configured to be compressed between the top wall 723 and the first end 713 in the second direction Y. The elastic members 73 are springs, and opposite ends of the springs along the second direction Y are abutted against the top wall 723 and the pressing strips 71 one by one. The top wall 723 is provided with a first limiting hole 7231, and one end of the elastic member 73 in the second direction Y is accommodated in the first limiting hole 7231; the pressing bar 71 is provided with a second limiting hole 717, and the other end of the elastic member 73 in the second direction Y is accommodated in the second limiting hole 717. The molding assembly 7 further includes a cover 74, the cover 74 being attached to an end of at least one of the side walls facing away from the top wall 723 and closing at least a portion of the first opening 727, the first end 713 being trapped between the top wall 723 and the cover 74. The molding assembly 7 further includes an insulating member 75, and the insulating member 75 is connected to opposite sides of the molding 71 in the third direction Z and the second surface 712, and serves to electrically isolate the molding 71 from the battery cell 5.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with other technical solutions, which may not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. A bead assembly for installation in a battery including a battery cell and a spacing beam limiting expansion of the battery cell, the bead assembly comprising:

a bead having a first surface and a second surface disposed opposite to each other, the first surface for facing an end surface of the battery cell where an electrode terminal is disposed, the bead extending in a first direction and having a first end and a second end opposite to each other in the first direction;

the fixing piece comprises a limiting space and a first side wall facing the limiting space, wherein the first end is limited in the limiting space and abuts against the inner wall surface of the first side wall along the direction from the first end to the second end, the limiting space forms a space for the first end to move along the inner wall surface of the first side wall in a second direction, and the second direction is parallel to the arrangement direction from the first surface to the second surface.

2. The molding assembly of claim 1, wherein the molding comprises a molding body and a locking portion disposed at least one end of the molding body in the first direction and protruding from at least one side of the molding body in the third direction, the locking portion being defined in the spacing space and abutting against the first sidewall, the first direction, the second direction, and the third direction intersecting one another.

3. The molding assembly according to claim 2, wherein the locking portions protrude from opposite sides of the bar body in the third direction, the first side wall is provided with avoiding portions for the bar body to move in the second direction, and opposite ends of the locking portions in the third direction are abutted against the first side wall.

4. The molding assembly of claim 1, wherein said number of said fixing members is two, said first end being limited to one of said fixing members, said second end being limited to the other of said fixing members, said second end being abutted against said first side wall of the other of said fixing members in a direction from said second end to said first end and being movable in said second direction along an inner wall surface of said first side wall.

5. The molding assembly of any one of claims 1-4, wherein the securing member includes a top wall and a plurality of side walls connected to the top wall, the top wall and the plurality of side walls defining the spacing space, the plurality of side walls including the first side wall, the plurality of side walls defining a first opening for the first end to enter the spacing space.

6. The molding assembly of claim 5, wherein a plurality of said side walls include a second side wall disposed opposite said first side wall in said first direction, said second side wall being adapted to connect to one side of said battery cell of said retainer Liang Beili.

7. The molding assembly of claim 6, further comprising a fastener configured to pass through the second sidewall in the first direction and connect with the spacing beam.

8. The molding assembly of claim 6, wherein a plurality of said side walls include third and fourth side walls disposed opposite one another in a third direction, said third and fourth side walls each being connected to said first and second side walls, said first, second and third directions intersecting one another.

9. The molding assembly of claim 5, further comprising an elastic member positioned in said spacing space, said elastic member being connected at one end to a top wall and at the other end to said first end in said second direction, said elastic member being configured to be compressed between said top wall and said first end in said second direction.

10. The molding assembly of claim 9, wherein said elastic member is a spring, opposite ends of said spring in said second direction being in one-to-one abutment with said top wall and said molding.

11. The molding assembly of claim 9, wherein said top wall defines a first limiting aperture, said resilient member being received in said first limiting aperture at one end in said second direction;

and/or the layering is provided with a second limiting hole, and the other end of the elastic piece in the second direction is accommodated in the second limiting hole.

12. The molding assembly of claim 5, further comprising a cover plate connected to an end of at least one of said side walls facing away from said top wall and closing at least a portion of said first opening, said first end being defined between said top wall and said cover plate.

13. The bead assembly of claim 1, further comprising an insulator attached to opposite sides of the bead in a third direction and to the second surface for electrically isolating the bead from the battery cell, the first direction, the second direction, and the third direction intersecting one another.

14. A battery, comprising:

the box body comprises two limit beams arranged along a first direction;

the battery monomers are arranged between the two limiting beams;

the molding assembly according to any one of claims 1 to 13, wherein the molding is attached to an end surface of the plurality of battery cells arranged in the first direction, on which electrode terminals are provided, and the fixing member is attached to a top surface of the stopper beam.

15. An electrical device comprising a battery as claimed in claim 14 for providing electrical energy.