CN220692193U - Battery box, battery and electric equipment - Google Patents

Abstract

The application discloses a battery box, battery and consumer belongs to battery technology field. The battery box body comprises a box body, a support and an expansion beam, wherein the box body is provided with a containing cavity for containing the battery monomers. The support is arranged in the box body and connected with the box body. The expansion beam is connected to the bracket, is arranged along a first direction with the battery cell, and is used for being abutted with the battery cell so as to resist the expansion force of the battery cell. The bracket has a first surface intersecting a first direction in which one side of the expanded Liang Beili cell abuts. The bracket may provide a certain holding force to the expansion beam in the first direction. The rigidity and strength of the expansion beam are improved when the battery cells expand to improve the ability of the expansion beam to resist expansion of the battery cells. Furthermore, the risk that the structure of the box body is deformed to cause the sealing failure of the box body of the battery due to excessive deformation of the battery monomer is reduced, and the reliability of the battery is improved.

Description

Battery box, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery box, a battery and electric equipment.

Background

Batteries are widely used in electronic devices such as electric vehicles, electric automobiles, electric airplanes, electric ships, and the like.

How to improve the reliability of the battery is a problem to be solved in the battery technology.

Disclosure of Invention

In view of the above, the application provides a battery box, a battery and electric equipment, which can improve the reliability of the battery.

In a first aspect, the present application provides a battery box, the battery box includes box body, support and expansion beam, and the box body has and holds the chamber, holds the chamber and is used for holding the battery monomer. The support is arranged in the box body and connected with the box body. The expansion beam is connected to the bracket, is arranged along a first direction with the battery cell, and is used for being abutted with the battery cell so as to resist the expansion force of the battery cell. The bracket is provided with a first surface intersecting with a first direction, and one side of the expansion Liang Beili battery cell is abutted against the first surface in the first direction.

In the technical scheme of this application embodiment, when battery monomer inflation warp, the expansion beam can provide certain holding power in first direction. Since the expansion beam is connected to the bracket, the bracket is provided with a first surface intersecting with the first direction, one side of the expansion Liang Beili battery cell is abutted against the first surface, and the bracket can provide a certain abutting force for the expansion beam in the first direction. The rigidity and strength of the expansion beam are improved when the battery cells expand to improve the ability of the expansion beam to resist expansion of the battery cells. Furthermore, the risk that the structure of the box body is deformed to cause the sealing failure of the box body of the battery due to excessive deformation of the battery monomer is reduced, and the reliability of the battery is improved.

In some embodiments, the case body includes a bottom plate for supporting the battery cells. In the second direction, the expansion beam has a dimension H, and the first surface has a dimension D, satisfying:the second direction is perpendicular to the bottom plate. The relationship between the expansion Zhang Liangde size and the first surface size is set in a reasonable range, and when the battery cells are expanded and deformed, the expansion beam support has a good supporting effect, so that the capacity of the expansion beam for resisting the expansion of the battery cells is improved.

In some embodiments, the case body includes a bottom plate for supporting the battery cells; the bracket is provided with a second surface adjacent to the first surface, and along the second direction, one side of the expansion beam, which is close to the bottom plate, is abutted against the second surface; the second direction is perpendicular to the bottom plate. In one aspect, the first surface and the second surface may form a stepped surface that may facilitate assembly of the expansion beam. On the other hand, the bracket can be used as a reinforcing beam of the bottom plate, so that the structural strength of the box body is improved.

In some embodiments, the first surface is perpendicular to the first direction and the second surface is parallel to the first direction. By means of the design, the included angle between the first surface and the second surface is a right angle, so that the assembly of the expansion beam and the bracket is more convenient. Meanwhile, for the expansion beam, most of the area of the first surface can play a good supporting role.

In some embodiments, the battery case further includes a first fastener by which the expansion beam is coupled to the first surface and a second fastener by which the expansion beam is coupled to the second surface. The first fastener and the second fastener strengthen the overall strength of the expansion beam and the bracket, and further strengthen the expansion beam's ability to resist cell expansion.

In some embodiments, the expansion beam is a hollow structure, the wall of the expansion beam is provided with a first through hole and a second through hole, the first surface is provided with a third through hole, the second surface is provided with a fourth through hole, the first fastener is arranged through the first through hole and the third through hole, and the second fastener is arranged through the second through hole and the fourth through hole. The first through hole, the second through hole, the third through hole and the fourth through hole can serve as assembly references of the first fastening piece and the second fastening piece, and assembly of the first fastening piece and the second fastening piece is facilitated.

In some embodiments, the number of the first fasteners is a plurality, the plurality of first fasteners are arranged at intervals along the third direction, the number of the second fasteners is a plurality, the plurality of second fasteners are arranged at intervals along the third direction, and the third direction, the first direction and the second direction are perpendicular to each other. By the design, the overall strength of the expansion beam and the bracket is further enhanced.

In some embodiments, the first fastener and the second fastener are rivets. Such a design is less costly and the rivet has better vibration resistance than a screw.

In some embodiments, a first glue layer is disposed between the expansion beam and the first surface, and a second glue layer is disposed between the expansion beam and the second surface. The first adhesive layer and the second adhesive layer strengthen the overall strength of the expansion beam and the bracket, and further strengthen the capacity of the expansion beam for resisting the expansion of the battery cells.

In some embodiments, the bracket is a beam extending along a third direction, the bracket includes a first wall, a second wall, a third wall, a fourth wall, and a fifth wall connected in sequence, the first wall and the fifth wall being disposed opposite each other along the first direction, the fourth wall being disposed opposite the bottom plate along a second direction, a surface of the second wall facing the expansion beam being a second surface, and a surface of the third wall facing the expansion beam being a first surface. By the design, the support is hollow, and when the battery monomer expands and deforms, the support has a certain buffering effect, so that the service life of the support is prolonged.

In some embodiments, the bracket further comprises a sixth wall extending from an end of the first wall away from the second wall in a direction away from the fifth wall, and a seventh wall extending from an end of the fifth wall away from the fourth wall in a direction away from the first wall, the sixth wall and the seventh wall being connected to the base plate. The sixth wall and the seventh wall can be used as assembling parts when the bracket is connected with the bottom plate, for example, can be used as welding parts, mounting parts of fasteners and the like, so that the assembly of the bracket and the bottom plate is more convenient.

In some embodiments, the case body further includes a frame, and the frame is enclosed around the bottom plate; the support is formed with the turn-ups at the ascending both ends of third direction, and the turn-ups is connected with the frame, and two liang are perpendicular in third direction, first direction and second direction. By the design, the bracket is used as a part of the framework of the box body, so that the structural strength of the box body is improved.

In some embodiments, the expansion beam is a hollow structure, and the expansion beam includes a first side wall and a second side wall disposed opposite to each other along a first direction, and a third side wall and a fourth side wall disposed opposite to each other along a second direction, where the first side wall abuts against the first surface, and the third side wall abuts against the second surface. The hollow expansion beam can play a certain buffering role when the battery monomer expands and deforms, so that the expansion beam can absorb certain expansion force, and the capacity of the expansion beam for resisting the expansion of the battery monomer is improved.

In some embodiments, the interior of the expansion beam is provided with a first brace bar connecting the first and second side walls. By the design, the structural strength of the expansion beam is improved.

In some embodiments, the expansion beam is further provided with a second support rib inside, the second support rib connecting the first side wall and the second side wall, the second support rib intersecting the first support rib at the first side wall. When the battery monomer expands and deforms, the first side wall can provide certain supporting force for the first supporting rib and the second supporting rib, and the risk of fracture of the first supporting rib and the second supporting rib is reduced.

In some embodiments, the number of the expansion beams and the number of the brackets are two, the two expansion beams are arranged at intervals along the first direction, the brackets are arranged in one-to-one correspondence with the expansion beams, and the battery cells are positioned between the two expansion beams. By the design, the two ends of the battery box body in the first direction have certain capacity of resisting the expansion of the battery cells, and the risk that the battery box body is excessively deformed to cause the sealing failure when the battery cells are expanded and deformed is reduced.

In a second aspect, the present application provides a battery, which includes a battery cell and the battery case in the foregoing embodiment, where the battery cell is accommodated in the accommodating cavity.

In a third aspect, the present application provides a powered device, which includes a battery in the foregoing embodiment, where the battery is configured to provide electrical energy.

The foregoing description is merely an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make other objects, features and advantages of the present application more understandable, the following specific embodiments of the present application are specifically described below.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

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

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

FIG. 3 is an exploded view of a portion of the structure of a battery case according to some embodiments of the present application;

FIG. 4 is a cross-sectional view of a battery case according to some embodiments of the present application;

FIG. 5 is a schematic view of a partial structure of a battery case according to some embodiments of the present application;

FIG. 6 is a schematic structural view of an expansion beam according to some embodiments of the present application;

fig. 7 is a schematic structural view of a stent according to some embodiments of the present application.

Reference numerals in the specific embodiments are as follows:

1000-vehicle; 200-a controller; 300-motor; 100-cell; 11-a battery box; 111-a first part; 112-a second portion; 113-a box body; 1131-a bottom plate; 1132-border; 114-a bracket; 1141-a first surface; 1142-a second surface; 1143-a third via; 1144-fourth via; 1145-a fifth via; 1146-a first wall; 1147-a second wall; 1148-a third wall; 1149-a fourth wall; 11410-a fifth wall; 11411-sixth wall; 11412-seventh wall; 11413-flanging; 115-expansion beams; 1151-a first via; 1152-a second via; 1153-a first sidewall; 1154-a second sidewall; 1155-a third sidewall; 1156-fourth side wall; 1157-a first support rib; 1158-a second support bar; 116-a first fastener; 117-a second fastener; 12-battery cells; x-a first direction; y-a second direction; z-third direction.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection 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 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.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein 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 present 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, the battery cell may include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The shape of the battery cell may include, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped, or other shape, etc. The battery cells may include, but are not limited to, cylindrical battery cells, prismatic battery cells, and pouch battery cells in a packaged manner.

In some high power applications, such as electric vehicles, the application of batteries includes three levels: battery cell, battery module, and battery. The battery module is formed by electrically connecting a certain number of battery cells together and putting the same into one frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system incorporated into the electric vehicle. 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. The battery generally includes a case for enclosing one or more battery cells. The case may reduce the risk of liquids or other foreign matter affecting the charging or discharging of the battery cells.

The battery cell generally includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate.

Taking a lithium ion battery as an example, the lithium ion battery can cause expansion and contraction of an electrode assembly due to intercalation and deintercalation of lithium ions in an electrode active material during charge and discharge processes. Ideally, the volumetric changes of the electrode assembly during insertion and extraction should be reversible. However, in practical cases, there is always a portion of lithium ions that cannot be completely extracted from the anode, or deposited as insoluble byproducts on the anode surface during cycling. That is, the electrode assembly is gradually expanded as the battery cell is used for a longer period of time in general, so that the volume of the battery cell expands as the electrode assembly expands. And as the attenuation degree of the battery cell capacity is increased, the generated outward expansion force is increased. Therefore, the reliability of the battery case housing the battery cells is required to be high.

Hereinafter, it will be mainly developed around the rectangular parallelepiped battery cells. It should be understood that the embodiments described hereinafter are also applicable in certain respects to cylindrical battery cells or pouch battery cells.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the reliability of the battery.

Generally, in order to increase the energy density of the battery, the gap between the battery cell and the case is small. Therefore, the expansion force generated when the battery cell expands may act on the case, so that the structure of the case itself is deformed, and when the expansion deformation amplitude is too large, the case may have a risk of sealing failure, and the reliability of the battery is poor. In some cases, a plurality of battery cells are accommodated in the box body, and the risk of deformation of the box body structure is aggravated by the fact that the expansion deformation of the plurality of battery cells is superposed together. For this reason, structures such as an expansion beam, a steel belt, a strap, an end plate, etc., for resisting the expansion force of the battery cells are generally provided in the case, so as to improve the reliability of the case structure.

The ordinary expansion beam is arranged on the bottom plate of the box body, and when the battery monomer expands and deforms, the strength and the rigidity of the expansion beam are lower, the expansion beam is easy to deform along with the expansion and deformation of the battery monomer, and the capacity of resisting the deformation of the battery monomer is weaker and is easy to fail. The reliability of the battery may be reduced after the expansion beam itself fails.

In view of this, this application provides a battery box, and the battery box includes box body, support and expansion beam, and the box body has and holds the chamber, holds the chamber and is used for holding the battery monomer. The support is arranged in the box body and connected with the box body. The expansion beam is connected to the bracket, is arranged along a first direction X with the battery cells, and is used for being abutted with the battery cells so as to resist the expansion force of the battery cells. The bracket is provided with a first surface intersecting with a first direction, and one side of the expansion Liang Beili battery cell is abutted against the first surface in the first direction. When the battery cell expands and deforms, the expansion beam can provide certain supporting force in the first direction. Since the expansion beam is connected to the bracket, the bracket is provided with a first surface intersecting with the first direction, one side of the expansion Liang Beili battery cell is abutted against the first surface, and the bracket can provide a certain abutting force for the expansion beam in the first direction. The rigidity and strength of the expansion beam are improved when the battery cells expand to improve the ability of the expansion beam to resist expansion of the battery cells. Furthermore, the risk that the structure of the box body is deformed to cause the sealing failure of the box body of the battery due to excessive deformation of the battery monomer is reduced, and the reliability of the battery is improved.

The technical scheme described by the embodiment of the application is suitable for battery monomers, batteries and electric equipment using the batteries.

Powered devices include, but are not limited to: battery cars, electric vehicles, ships, and spacecraft, etc., for example, spacecraft including airplanes, rockets, space shuttles, and spacecraft, etc.

For convenience of description, the following embodiments take a powered device according to an embodiment of the present application as an example of the vehicle 1000.

For example, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, where the vehicle 1000 may be a fuel-oil vehicle, a gas-fuel vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended range vehicle. The motor 300, the controller 200, and the battery 100 may be provided in the vehicle 1000, and the controller 200 is used to control the battery 100 to supply power to the motor 300. For example, the battery 100 may be provided at the bottom or the head or tail of the vehicle 1000. Battery 100 may be used to power vehicle 1000, for example, battery 100 may be used as an operating power source for vehicle 1000, for circuitry of vehicle 1000, for example, for operating power requirements during start-up, navigation, and operation of vehicle 1000. In another embodiment of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

To meet different power requirements, the battery 100 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections. Battery 100 may also be referred to as a battery pack. Alternatively, the plurality of battery cells 12 may be connected in series or parallel or in series to form a battery module, and then connected in series or parallel or in series to form the battery 100. That is, the plurality of battery cells 12 may be directly assembled into the battery 100, or may be assembled into a battery module, and the battery module may be assembled into the battery 100.

For example, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application, and the battery 100 may include a plurality of battery cells 12. The battery 100 may further include a battery case 11, wherein the battery case 11 has a hollow structure, and a plurality of battery cells 12 are accommodated in the battery case 11. As shown in fig. 2, referred to herein as first portion 111 and second portion 112, respectively, first portion 111 and second portion 112 snap together. The shape of the first portion 111 and the second portion 112 may be determined according to the shape of the combination of the plurality of battery cells 12, and each of the first portion 111 and the second portion 112 may have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and each has only one surface as an open surface, the opening of the first portion 111 and the opening of the second portion 112 are disposed opposite to each other, and the first portion 111 and the second portion 112 are fastened to each other to form the battery case 11 having a closed chamber. The plurality of battery cells 12 are mutually connected in parallel or in series-parallel combination and then are placed in the battery box 11 formed by buckling the first part 111 and the second part 112.

In some embodiments, the battery case 11 may further include two expansion beams 115, the expansion beams 115 and the plurality of battery cells 12 being arranged along the first direction X with the plurality of battery cells 12 being located between the two expansion beams 115, the expansion beams 115 being operable to resist an expansion force of the battery cells 12.

Alternatively, the battery 100 may further include other structures, which are not described in detail herein. For example, the cell may also include a bussing member for making electrical connection between the plurality of cells 12, such as parallel or series-parallel. Specifically, the bus member may realize electrical connection between the battery cells 12 by connecting electrode terminals of the battery cells 12. Further, the bus member may be fixed to the electrode terminals of the battery cells 12 by welding. The electric power of the plurality of battery cells 12 may be further led out through the battery case 11 by the conductive mechanism.

The number of battery cells 12 may be set to any number depending on the different power requirements. The plurality of battery cells 12 may be connected in series, parallel, or series-parallel to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery 100 may be large, the battery cells 12 may be arranged in groups for easy installation, and each group of battery cells 12 constitutes a battery module. The number of battery cells 12 included in the battery module is not limited and may be set according to requirements. The battery 100 may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel.

Referring to fig. 3-5, according to some embodiments of the present application, a battery case 11 is provided, where the battery case 11 includes a case body 113, a bracket 114, and an expansion beam 115, and the case body 113 has a receiving cavity for receiving a battery cell 12. The bracket 114 is disposed in the case body 113 and connected to the case body 113. The expansion beams 115 are connected to the bracket 114, the expansion beams 115 are arranged along the first direction X with the battery cells 12, and the expansion beams 115 are used for abutting against the battery cells 12 to resist the expansion force of the battery cells 12. The bracket 114 has a first surface 1141 intersecting with a first direction X, and in the first direction X, a side of the expansion beam 115 facing away from the battery cell 12 abuts against the first surface 1141.

The battery 100 may further include a battery case 11, wherein the battery case 11 has a hollow structure, and a plurality of battery cells 12 are accommodated in the battery case 11. As shown in fig. 2, referred to herein as first portion 111 and second portion 112, respectively, first portion 111 and second portion 112 snap together. The shape of the first portion 111 and the second portion 112 may be determined according to the shape of the combination of the plurality of battery cells 12, and each of the first portion 111 and the second portion 112 may have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and each has only one surface as an open surface, the opening of the first portion 111 and the opening of the second portion 112 are disposed opposite to each other, and the first portion 111 and the second portion 112 are fastened to each other to form the battery case 11 having a closed chamber. In some embodiments, the structure of the first portion 111 and the second portion 112 after being fastened may be referred to as a case body 113, the first portion 111 may be referred to as an upper case or an upper cover, and the second portion 112 may be referred to as a lower case or a tray. The lower case may include a bottom plate 1131 and a frame 1132, where the frame 1132 is enclosed on the edge of the bottom plate 1131 to form a containing cavity with an opening, and the upper case is used to close the opening so that the containing cavity is closed. The battery cells 12 are generally accommodated in the accommodation chamber.

The support 114 may be hollow or solid. The bracket 114 is generally connected to the bottom plate 1131 of the case body 113, and the bracket 114 may be connected to the bottom plate 1131 by welding, riveting, bolting, bonding, or the like.

The expansion beam 115 may have a hollow structure or a solid structure. The expansion beams 115 may be attached to the brackets 114 by welding, riveting, bolting, bonding, etc.

The first direction X is generally the direction in which the battery cells 12 are arranged. In some embodiments, the large face of the battery cell 12 is disposed opposite the first surface 1141 in the first direction X, which is designed to allow for a large deformation amplitude of the large face during the expansion deformation of the battery cell 12.

The expansion beam 115 is used to abut against the battery cell 12 to resist the expansion force of the battery cell 12. It can be understood that the battery cell 12 abuts against the expansion beam 115 when the battery cell 12 begins to expand, or abuts against the expansion beam 115 after the battery cell 12 expands by a certain extent, and the expansion beam 115 can provide a certain supporting force to the battery cell 12 after the battery cell 12 abuts against the expansion beam 115 so as to resist the expansion force of the battery cell 12. In the process of assembling the battery case 11, the size of the gap between the battery cell 12 and the expansion beam 115 or whether the battery cell 12 and the expansion beam 115 abut after the assembly is completed may be determined according to actual requirements.

The first surface 1141 intersects the first direction X, and the expansion beam 115 abuts against the first surface 1141, which means that when an expansion force in the first direction X generated by the expansion deformation of the battery cell 12 acts on the expansion beam 115, the direct first surface 1141 can provide a certain supporting force for the expansion beam 115, so as to reduce the risk of toppling of the expansion beam 115, and thus improve the capability of the expansion beam 115 against the expansion deformation of the battery cell 12.

In some embodiments, the bracket 114 extends along the third direction Z and is connected to the frame 1132, the bracket 114 is connected to the bottom plate 1131 in the second direction Y, and the bracket 114 may be considered as a part of the framework of the case body 113, so that the case body 113 has improved ability to resist shearing forces and bending moments, and the risk of the case body 113 failing in sealing due to excessive deformation of the case body 113 is reduced.

In the technical solution of the embodiment of the present application, when the battery monomer 12 expands and deforms, the expansion beam 115 may provide a certain holding force in the first direction X. Since the expansion beam 115 is connected to the bracket 114, the bracket 114 has a first surface 1141 intersecting the first direction X, and a side of the expansion beam 115 facing away from the battery cell 12 abuts against the first surface 1141, the bracket 114 may provide a certain abutting force to the expansion beam 115 in the first direction X. The rigidity and strength of the expansion beam 115 are increased when the battery cell 12 expands to increase the ability of the expansion beam 115 to resist expansion of the battery cell 12. Further, the risk of failure of the battery case 11 due to deformation of the structure of the case body 113 caused by excessive deformation of the battery cells 12 is reduced, and the reliability of the battery 100 is improved.

Referring to fig. 4-5, according to some embodiments of the present application, the case body 113 includes a bottom plate 1131, and the bottom plate 1131 is used to support the battery cells 12. In the second direction Y, the expansion beam 115 has a dimension H, and the first surface 1141 has a dimension D, satisfying: d is not less than ¹ ₃ H is formed; the second direction Y is perpendicular to the bottom plate 1131.

The second direction Y intersects the first direction X, which in some implementations is perpendicular to the second direction Y.

In some embodiments, the battery cells 12 may be adhered to the base plate 1131. In other embodiments, the bottom plate 1131 may be provided with limit grooves corresponding to the battery cells 12 one by one, and the battery cells 12 are clamped into the limit grooves.

The relationship between the size of the expansion Zhang Liangde and the size of the first surface 1141 is set within a reasonable range, and when the battery cell 12 expands and deforms, the support 114 of the expansion beam 115 has a better supporting effect, so that the capacity of the expansion beam 115 for resisting the expansion of the battery cell 12 is improved.

Referring to fig. 4-5, according to some embodiments of the present application, the case body 113 includes a bottom plate 1131, and the bottom plate 1131 is used for supporting the battery cells 12; the bracket 114 has a second surface 1142 adjacent to the first surface 1141, and along the second direction Y, a side of the expansion beam 115 near the bottom plate 1131 abuts against the second surface 1142; the second direction Y is perpendicular to the bottom plate 1131.

The bracket 114 has a second surface 1142 adjacent to the first surface 1141, and along the second direction Y, a side of the expansion beam 115 near the bottom plate 1131 abuts against the second surface 1142; the second direction Y is perpendicular to the bottom plate 1131. Meaning that the first surface 1141 and the second surface 1142 form a stepped surface.

In one aspect, the first surface 1141 and the second surface 1142 may form a stepped surface that may facilitate assembly of the expansion beam 115. On the other hand, the bracket 114 may serve as a reinforcing beam for the bottom plate 1131, improving the structural strength of the case body 113.

Referring to fig. 4-5, according to some embodiments of the present application, the first surface 1141 is perpendicular to the first direction X, and the second surface 1142 is parallel to the first direction X. Such a design means that the first surface 1141 and the second surface 1142 are angled at right angles, which facilitates assembly of the expansion beam 115 and the bracket 114. At the same time, a large portion of the first surface 1141 may serve as a better support for the expansion beam 115.

Referring to fig. 4 and 5, according to some embodiments of the present application, the battery case 11 further includes a first fastener 116 and a second fastener 117, the expansion beam 115 is connected to the first surface 1141 by the first fastener 116, and the expansion beam 115 is connected to the second surface 1142 by the second fastener 117.

The first fastener 116 and/or the second fastener 117 may be rivets, screws, bolts, nuts, or the like.

The first fastener 116 and the second fastener 117 strengthen the overall strength of the expansion beam 115 and the bracket 114, further strengthening the expansion beam 115's ability to resist expansion of the battery cell 12.

According to some embodiments of the present application, referring to fig. 4 and 5, the expansion beam 115 is of a hollow structure, a wall portion of the expansion beam 115 is provided with a first through hole 1151 and a second through hole 1152, the first surface 1141 is provided with a third through hole 1143, the second surface 1142 is provided with a fourth through hole 1144, the first fastening piece 116 penetrates the first through hole 1151 and the third through hole 1143, and the second fastening piece 117 penetrates the second through hole 1152 and the fourth through hole 1144.

The first and second through holes 1151 and 1152 may be machined into the wall of the expansion beam 115. Or may be injection molded integrally with the expansion beam 115.

The third through-hole 1143 and the fourth through-hole 1144 may be formed in the bracket 114 by machining. Or may be integrally injection molded with the bracket 114.

Referring to fig. 4 and 7, in some embodiments, the bracket 114 is further provided with a fifth through hole 1145, and the expansion beam 115 may be first mounted between the first surface 1141 and the second surface 1142, i.e., snapped onto the bracket 114, during assembly of the expansion beam 115 and the bracket 114. The expansion beam 115 is then attached to the second surface 1142 by a second fastener 117 from the bottom of the bracket 114. The first fastener 116 may extend into the bracket 114 through the fifth through hole 1145, and then pass through the first through hole 1151 and the third through hole 1143 to connect the expansion beam 115 to the first surface 1141.

The first, second, third and fourth through-holes 1151, 1152, 1143 and 1144 may serve as assembly references for the first and second fasteners 116 and 117, facilitating assembly of the first and second fasteners 117.

According to some embodiments of the present application, referring to fig. 4 and 5, the number of the first fasteners 116 is plural, the first fasteners 116 are disposed at intervals along the third direction Z, the number of the second fasteners 117 is plural, the second fasteners 117 are disposed at intervals along the third direction Z, and the third direction Z, the first direction X and the second direction Y are perpendicular to each other. Such a design further enhances the overall strength of the expansion beam 115 and the bracket 114.

Referring to fig. 4, according to some embodiments of the present application, the first fastener 116 and the second fastener 117 are rivets. Such a design is less costly and the rivet has better vibration resistance than a screw.

According to some embodiments of the present application, referring to fig. 4, a first adhesive layer is disposed between the expansion beam 115 and the first surface 1141, and a second adhesive layer is disposed between the expansion beam 115 and the second surface 1142.

The expansion beam 115 is displaced in the first direction X with respect to the bracket 114 by the presence of the first surface 1141 to a smaller extent, thereby reducing the risk of spillage of the first and second glue layers due to the displacement of the expansion beam 115 in the first direction X with respect to the bracket 114.

The first adhesive layer and/or the second adhesive layer may be structural adhesive, etc.

The first and second glue layers strengthen the overall strength of the expansion beams 115 and the brackets 114, further strengthening the expansion beams 115' ability to resist expansion of the cells 12.

Referring to fig. 4, 5 and 7, the bracket 114 is a beam extending along a third direction Z, the bracket 114 includes a first wall 1146, a second wall 1147, a third wall 1148, a fourth wall 1149 and a fifth wall 11410 connected in sequence, the first wall 1146 and the fifth wall 11410 are disposed opposite to each other along a first direction X, the fourth wall 1149 is disposed opposite to the bottom plate 1131 along a second direction Y, a surface of the second wall 1147 facing the expansion beam 115 is a second surface 1142, and a surface of the third wall 1148 facing the expansion beam 115 is a first surface 1141.

The stent 114 comprises a first wall 1146, a second wall 1147, a third wall 1148, a fourth wall 1149 and a fifth wall 11410 connected in sequence, meaning that the stent 114 is a hollow frame-like structure. The bracket 114 may be injection molded. Such a design, on the one hand, may reduce the overall weight of the bracket 114, and thus the overall weight of the battery 100. On the other hand, when the battery cell 12 expands and deforms, the hollow frame-shaped structure has a certain cushioning effect and can absorb a certain expansion force.

The bracket 114 is a beam extending along a third direction Z, the bracket 114 includes a first wall 1146, a second wall 1147, a third wall 1148, a fourth wall 1149, and a fifth wall 11410 that are sequentially connected, the first wall 1146 and the fifth wall 11410 are disposed opposite to each other along the first direction X, the fourth wall 1149 is disposed opposite to the bottom plate 1131 along a second direction Y, a surface of the second wall 1147 facing the expansion beam 115 is a second surface 1142, and a surface of the third wall 1148 facing the expansion beam 115 is a first surface 1141. By adopting the design, the bracket 114 is hollow, and has a certain buffering function when the battery cells 12 are expanded and deformed, so that the service life of the bracket 114 is prolonged.

Referring to fig. 4, 5 and 7, according to some embodiments of the present application, the bracket 114 further includes a sixth wall 11411 and a seventh wall 11412, the sixth wall 11411 extends from an end of the first wall 1146 away from the second wall 1147 in a direction away from the fifth wall 11410, the seventh wall 11412 extends from an end of the fifth wall 11410 away from the fourth wall 1149 in a direction away from the first wall 1146, and the sixth wall 11411 and the seventh wall 11412 are connected to the bottom plate 1131.

In some embodiments, the sixth and seventh walls 11411, 11412 may be welded to the base plate 1131, with the sixth and seventh walls 11411, 11412 extending in a direction parallel to the base plate 1131. During welding, gaps between the sixth wall 11411 and the seventh wall 11412 and the bottom plate 1131 are small, and welding can be conveniently performed without limiting through a clamp. In other embodiments, the sixth wall 11411 and the seventh wall 11412 may also be connected to the bottom plate 1131 by fasteners, and the sixth wall 11411 and the seventh wall 11412 extend in a direction parallel to the bottom plate 1131. The connection of the sixth and seventh walls 11411, 11412 to the bottom plate 1131 is conveniently accomplished using commonly used standard fasteners, such as bolts, screws, and the like.

The sixth wall 11411 and the seventh wall 11412 may serve as an assembly portion when the bracket 114 is connected to the base plate 1131, for example, may serve as a welding portion, a fastening portion, or the like, so that the assembly directly with the base plate 1131 is more convenient.

Referring to fig. 4, 5 and 7, according to some embodiments of the present application, the case body 113 further includes a frame 1132, and the frame 1132 is enclosed around the bottom plate 1131; the bracket 114 has flanges 11413 formed at both ends in the third direction Z, and the flanges 11413 are connected to the frame 1132, and the third direction Z, the first direction X, and the second direction Y are perpendicular to each other.

The flange 11413 may be welded to the rim 1132 or may be attached to the rim 1132 by fasteners.

The case body 113 further includes a frame 1132, and the frame 1132 is enclosed around the bottom plate 1131; the bracket 114 has flanges 11413 formed at both ends in the third direction Z, and the flanges 11413 are connected to the frame 1132, and the third direction Z, the first direction X, and the second direction Y are perpendicular to each other. By the design, the bracket 114 is used as a part of the framework of the box body 113, so that the structural strength of the box body 113 is improved.

Referring to fig. 4, 5 and 6, the expansion beam 115 has a hollow structure, and the expansion beam 115 includes a first side wall 1153 and a second side wall 1154 disposed opposite to each other along a first direction X, and a third side wall 1155 and a fourth side wall 1156 disposed opposite to each other along a second direction Y, where the first side wall 1153 abuts against the first surface 1141 and the third side wall 1155 abuts against the second surface 1142.

The expansion beam 115 may be integrally injection molded.

The hollow structure of the expansion beam 115 can reduce the overall weight of the expansion beam 115.

The hollow expansion beam 115 can play a certain role in buffering when the battery cell 12 expands and deforms, so that the expansion beam 115 can absorb a certain expansion force, and the expansion capability of the expansion beam 115 for resisting the expansion of the battery cell 12 is improved.

Referring to fig. 4, 5 and 6, according to some embodiments of the present application, a first supporting rib 1157 is disposed inside the expansion beam 115, and the first supporting rib 1157 connects the first sidewall 1153 and the second sidewall 1154.

When the expansion beam 115 is subjected to expansion force, the first supporting rib 1157 can provide a certain supporting force for the first side wall 1153 and the second side wall 1154, so that the possibility of deformation of the first side wall 1153 and the second side wall 1154 is reduced.

The expansion beam 115 is provided inside with a first support rib 1157, and the first support rib 1157 connects the first side wall 1153 and the second side wall 1154. Such a design improves the structural strength of the expansion beam 115.

Referring to fig. 4, 5 and 6, a second supporting rib 1158 is further disposed inside the expansion beam 115, the second supporting rib 1158 connects the first sidewall 1153 and the second sidewall 1154, and the second supporting rib 1158 intersects the first supporting rib 1157 at the first sidewall 1153.

The second ribs 1158 may provide a certain supporting force to the first side wall 1153 and the second side wall 1154 when the expansion beam 115 is subjected to an expansion force, so as to reduce a possibility of deformation of the first side wall 1153 and the second side wall 1154. Meanwhile, compared with the first side wall 1153, the first side wall 1153 abuts against the first surface 1141, and the bracket 114 can provide a certain supporting force for the first supporting rib 1157 and the second supporting rib 1158, so as to reduce the risk of stress deformation of the first supporting rib 1157 and the second supporting rib 1158.

When the battery cell 12 expands and deforms, the first side wall 1153 can provide a certain supporting force to the first supporting rib 1157 and the second supporting rib 1158, so that the risk of breakage of the first supporting rib 1157 and the second supporting rib 1158 is reduced.

Referring to fig. 2-4, the number of the expansion beams 115 and the number of the supports 114 are two, the two expansion beams 115 are arranged at intervals along the first direction X, the supports 114 are arranged in one-to-one correspondence with the expansion beams 115, and the battery cells 12 are located between the two expansion beams 115. By the design, both ends of the battery box 11 in the first direction X have certain capacity of resisting the expansion of the battery cells 12, and the risk that the battery box 11 excessively deforms to cause sealing failure when the battery cells 12 are expanded and deformed is reduced.

According to some embodiments of the present application, there is provided a battery 100, including a battery cell 12 and a battery case 11 according to any of the above schemes, where the battery cell 12 is accommodated in an accommodating chamber.

According to some embodiments of the present application, there is provided a powered device, including a battery 100 as described in any of the above schemes, where the battery 100 is configured to provide electrical energy.

According to some embodiments of the present application, referring to fig. 3-7, the present application provides a battery case 11, the battery case 11 includes a case body 113, a bracket 114, and an expansion beam 115, the case body 113 includes a bottom plate 1131 and a frame 1132, and the bottom plate 1131 is used for supporting a battery cell 12. The frame 1132 is disposed around the bottom plate 1131. The bottom plate 1131 and the rim 1132 together form a receiving cavity having an opening for receiving the battery cell 12. The expansion beams 115 are aligned with the battery cells 12 along the first direction X, and the expansion beams 115 are used to abut against the battery cells 12 to resist the expansion force of the battery cells 12. The number of the expansion beams 115 and the number of the brackets 114 are two, the two expansion beams 115 are arranged at intervals along the first direction X, the brackets 114 are arranged in one-to-one correspondence with the expansion beams 115, and the battery cells 12 are positioned between the two expansion beams 115.

The bracket 114 has a first surface 1141 intersecting the first direction X in which a side of the expansion beam 115 facing away from the battery cell 12 abuts the first surface 1141. The bracket 114 has a second surface 1142 adjacent to the first surface 1141, and in the second direction Y, a side of the expansion beam 115 near the bottom plate 1131 abuts against the second surface 1142.

The bracket 114 is a beam extending along a third direction Z, the bracket 114 includes a first wall 1146, a second wall 1147, a third wall 1148, a fourth wall 1149, and a fifth wall 11410 that are sequentially connected, the first wall 1146 and the fifth wall 11410 are disposed opposite to each other along the first direction X, the fourth wall 1149 is disposed opposite to the bottom plate 1131 along a second direction Y, a surface of the second wall 1147 facing the expansion beam 115 is a second surface 1142, and a surface of the third wall 1148 facing the expansion beam 115 is a first surface 1141. The bracket 114 further includes a sixth wall 11411 and a seventh wall 11412, the sixth wall 11411 extending from an end of the first wall 1146 away from the second wall 1147 in a direction away from the fifth wall 11410, the seventh wall 11412 extending from an end of the fifth wall 11410 away from the fourth wall 1149 in a direction away from the first wall 1146, the sixth wall 11411 and the seventh wall 11412 being connected to the base plate 1131. The bracket 114 has flanges 11413 formed at both ends in the third direction Z, and the flanges 11413 are connected to the frame 1132.

The expansion beam 115 is a hollow structure, and the expansion beam 115 includes a first side wall 1153 and a second side wall 1154 disposed opposite to each other along the first direction X, and a third side wall 1155 and a fourth side wall 1156 disposed opposite to each other along the second direction Y, where the first side wall 1153 abuts against the first surface 1141, and the third side wall 1155 abuts against the second surface 1142. The expansion beam 115 is provided inside with a first support rib 1157, and the first support rib 1157 connects the first side wall 1153 and the second side wall 1154. The expansion beam 115 is further provided with a second supporting rib 1158 inside, the second supporting rib 1158 connects the first side wall 1153 and the second side wall 1154, and the second supporting rib 1158 intersects the first supporting rib 1157 at the first side wall 1153.

The first surface 1141 is perpendicular to the first direction X, and the second surface 1142 is parallel to the first direction X. The third direction Z, the first direction X and the second direction Y are perpendicular to each other.

The battery case 11 further includes a first fastener 116 and a second fastener 117, the expansion beam 115 is connected to the first surface 1141 by the first fastener 116, and the expansion beam 115 is connected to the second surface 1142 by the second fastener 117. The wall of the expansion beam 115 is provided with a first through hole 1151 and a second through hole 1152, the first surface 1141 is provided with a third through hole 1143, the second surface 1142 is provided with a fourth through hole 1144, the first fastening piece 116 is provided through the first through hole 1151 and the third through hole 1143, and the second fastening piece 117 is provided through the second through hole 1152 and the fourth through hole 1144. The number of the first fasteners 116 is plural, the first fasteners 116 are arranged at intervals along the third direction Z, the number of the second fasteners 117 is plural, the second fasteners 117 are arranged at intervals along the third direction Z, and the third direction Z, the first direction X and the second direction Y are perpendicular to each other. The first fastener 116 and the second fastener 117 are rivets. A first glue layer is disposed between the expansion beam 115 and the first surface 1141, and a second glue layer is disposed between the expansion beam 115 and the second surface 1142.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (18)

1. A battery box, comprising:

the box body is provided with a containing cavity which is used for containing the battery monomers;

the bracket is arranged in the box body and is connected with the box body;

the expansion beam is connected with the bracket, is arranged with the battery cells along a first direction and is used for abutting against the battery cells so as to resist the expansion force of the battery cells;

Wherein the bracket has a first surface intersecting the first direction in which one side of the expansion Liang Beili of the battery cell abuts against the first surface.

2. The battery box of claim 1, wherein the box body comprises a bottom plate for supporting the battery cells;

in the second direction, the expansion beam has a dimension H, and the first surface has a dimension D, satisfying:the second direction is perpendicular to the bottom plate.

3. The battery box of claim 1, wherein the box body comprises a bottom plate for supporting the battery cells;

the bracket is provided with a second surface adjacent to the first surface, and along a second direction, one side of the expansion beam, which is close to the bottom plate, is abutted against the second surface; the second direction is perpendicular to the bottom plate.

4. The battery compartment of claim 3, wherein the first surface is perpendicular to the first direction and the second surface is parallel to the first direction.

5. The battery box of claim 3 further comprising a first fastener and a second fastener, wherein the expansion beam is coupled to the first surface by the first fastener and the expansion beam is coupled to the second surface by the second fastener.

6. The battery box of claim 5, wherein the expansion beam is of a hollow structure, a wall portion of the expansion beam is provided with a first through hole and a second through hole, the first surface is provided with a third through hole, the second surface is provided with a fourth through hole, the first fastener is arranged through the first through hole and the third through hole, and the second fastener is arranged through the second through hole and the fourth through hole.

7. The battery box of claim 5, wherein the number of first fasteners is a plurality, the plurality of first fasteners are arranged at intervals along a third direction, the number of second fasteners is a plurality, the plurality of second fasteners are arranged at intervals along the third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

8. The battery compartment of claim 5, wherein the first fastener and the second fastener are rivets.

9. A battery box according to claim 3, wherein a first glue layer is provided between the expansion beam and the first surface, and a second glue layer is provided between the expansion beam and the second surface.

10. The battery box of claim 3, wherein the bracket is a beam extending in a third direction, the bracket includes a first wall, a second wall, a third wall, a fourth wall, and a fifth wall connected in this order, the first wall and the fifth wall are disposed opposite to each other in the first direction, the fourth wall is disposed opposite to the bottom plate in the second direction, a surface of the second wall facing the expansion beam is the second surface, and a surface of the third wall facing the expansion beam is the first surface.

11. The battery box of claim 10, wherein the bracket further comprises a sixth wall and a seventh wall, the sixth wall extending from an end of the first wall away from the second wall in a direction away from the fifth wall, the seventh wall extending from an end of the fifth wall away from the fourth wall in a direction away from the first wall, the sixth wall and the seventh wall being connected to the base plate.

12. The battery box of claim 10, wherein the box body further comprises a rim, the rim surrounding the bottom plate;

the support is formed with the turn-ups at the upper both ends of third direction, the turn-ups with the frame is connected, the third direction first direction with the two liang of perpendicular of second direction.

13. The battery box of claim 3, wherein the expansion beam is a hollow structure, the expansion beam includes a first side wall and a second side wall disposed opposite along the first direction, and a third side wall and a fourth side wall disposed opposite along the second direction, the first side wall is abutted to the first surface, and the third side wall is abutted to the second surface.

14. The battery box of claim 13, wherein the interior of the expansion beam is provided with a first brace bar that connects the first side wall and the second side wall.

15. The battery box of claim 14, wherein the expansion beam is further provided with a second brace bar inside, the second brace bar connecting the first sidewall and the second sidewall, the second brace bar intersecting the first brace bar at the first sidewall.

16. The battery box according to any one of claims 1 to 15, wherein the number of the expansion beams and the number of the brackets are two, the two expansion beams are arranged at intervals along the first direction, the brackets are arranged in one-to-one correspondence with the expansion beams, and the battery cells are located between the two expansion beams.

17. A battery, comprising:

the battery case according to any one of claims 1 to 16;

and the battery unit is accommodated in the accommodating cavity.

18. A powered device comprising the battery of claim 17, the battery to provide electrical energy to the powered device.