CN221150219U

CN221150219U - Battery box, battery, energy storage battery system and electric equipment

Info

Publication number: CN221150219U
Application number: CN202420614396.8U
Authority: CN
Inventors: 刘春龙; 张勇杰; 高海兴
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-03-28
Filing date: 2024-03-28
Publication date: 2024-06-14
Anticipated expiration: 2034-03-28

Abstract

The application provides a battery box, a battery, an energy storage battery system and electric equipment, and relates to the technical field of batteries. The battery box body provided by the application comprises a box wall, a first bearing piece, a second bearing piece, a connecting piece and a reinforcing piece, wherein a containing cavity is formed by enclosing the box wall; the first bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall; the second bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall and the first bearing piece; one end of the connecting piece is connected with at least one of the first bearing piece and the second bearing piece, and the other end of the connecting piece penetrates through the box wall to be connected with a target device; the reinforcement piece is of a split type structure with the first bearing piece and the second bearing piece and is fixedly connected with the first bearing piece and the second bearing piece. The battery box body provided by the application is used for accommodating the battery monomer, and the reliability of the battery box body can be improved.

Description

Battery box, battery, energy storage battery system and electric equipment

Technical Field

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

Background

The box wall of the battery box body is generally provided with a bearing part, one end of the connecting piece is connected with the bearing part, the other end of the connecting piece extends out of the battery box body to be connected to target equipment, and the weight of the box wall and the weight of parts inside the battery box body act on the connecting piece through the bearing part and then act on the target equipment, so that the battery box body is installed on the target equipment. However, in the related art, the battery box is not reliable enough in the case of being mounted on the target device.

Disclosure of Invention

The application provides a battery box, a battery, an energy storage battery system and electric equipment, which can improve the reliability of the battery box.

In a first aspect, the present application provides a battery case comprising a case wall, a first carrier, a second carrier, a connector, and a stiffener. Wherein, the wall of the box is enclosed to form a containing cavity; the first bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall; the second bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall and the first bearing piece; one end of the connecting piece is connected with at least one of the first bearing piece and the second bearing piece, and the other end of the connecting piece penetrates through the box wall to be connected with a target device; the reinforcement piece is of a split type structure with the first bearing piece and the second bearing piece and is fixedly connected with the first bearing piece and the second bearing piece.

Through making reinforcement and first carrier and second carrier fixed connection, the connection between first carrier and the second carrier has strengthened for first carrier and second carrier bearing capacity increase, first carrier and second carrier can bear the weight of the spare part of wall and battery box inside firmly, are favorable to improving the reliability of battery box.

In some implementations of the application, the connector is fixedly connected to the stiffener such that at least the other of the first carrier and the second carrier is fixedly connected to the connector by the stiffener.

Through making connecting piece and reinforcement fixed connection, the load that at least another one of first carrier and second carrier born can directly pass through the reinforcement and transmit to the connecting piece, can not pass through at least one of first carrier and second carrier, is favorable to improving the atress of the structure of making first carrier and second carrier fixed connection to be favorable to improving the reliability of battery box.

In some implementations of the application, one of the first carrier and the connecting member has a connecting hole formed therein, and the other includes an abutment surface on which a boss is provided, the boss being threadedly engaged with the connecting hole; the reinforcement member is supported between the abutment surface and the end surface of the first end of the connection hole in the axial direction of the connection hole so that the reinforcement member is fixedly connected with the connection member.

Through making the reinforcement support between the terminal surface of the first end of face and connecting hole that supports, the reinforcement can produce great frictional force with the terminal surface of the first end of connecting hole and the face of supporting for reinforcement and connecting piece fixed connection, this makes the installation of reinforcement and connecting piece comparatively firm. Moreover, the connection between the reinforcing piece and the connecting piece is realized by utilizing the connection between the connecting piece and the first bearing piece, so that the fixed connection between the reinforcing piece and the connecting piece is more convenient.

In some implementations of the application, the reinforcement member has a mounting groove formed thereon, the mounting groove having a depth direction that is an axial direction of the connection hole and directed from the connection member toward the first carrier member, and a bottom wall of the mounting groove is supported between the abutment surface and an end face of the first end of the connection hole along the axial direction of the connection hole.

Through being formed with the mounting groove on the messenger's reinforcement, the depth direction of mounting groove is directional by the connecting piece and is born the weight of the piece, and the diapire of mounting groove supports between the terminal surface of the first end of leaning on face and connecting hole for the connecting piece is installed firmly in the mounting groove, is favorable to improving the steadiness of reinforcement and connecting piece installation. Moreover, the setting of mounting groove also is favorable to reducing the extension length of projection, is favorable to improving the rigidity of projection, improves the atress condition of projection, promotes the steadiness of reinforcement and connecting piece installation.

In some implementations of the application, the connector extends in an axial direction of the connection hole to connect with the target device through the tank wall in the axial direction of the connection hole.

Through making the connecting piece extend along the axial of connecting hole, be used for wearing to establish the first hole of wearing of connecting piece on the case wall and can be coaxial with the connecting hole, be favorable to improving the convenience of connecting piece installation.

In some implementations of the application, the first and second carriers extend along a sidewall of the first side of the accommodating cavity, and an end of the first and second carriers adjacent to each other is fixedly connected along an extending direction of the sidewall of the first side.

The first bearing piece and the second bearing piece extend along the side wall of the first side of the accommodating cavity, so that the contact area between the box wall and the first bearing piece and the contact area between the box wall and the second bearing piece are large, and the stress condition of the connection position of the box wall and the first bearing piece and the connection position of the box wall and the second bearing piece are improved. Through making the extending direction along the lateral wall of first side, the one end fixed connection that first carrier and second carrier are close to each other is favorable to making first carrier and second carrier occupy less in the thickness direction of the lateral wall of first side, is favorable to promoting the energy density of battery.

In some implementations of the application, the stiffener is located on the same side of the first carrier as the second carrier in a thickness direction of the sidewall of the first side.

Through making along the thickness direction of the lateral wall of first side, the reinforcement is located the same side of first carrier and second carrier for the reinforcement is connected with the great surface of first carrier and second carrier area, is favorable to making the reinforcement have great area of contact between first carrier and the second carrier, thereby is favorable to improving the steadiness of reinforcement installation.

In some implementations of the application, the stiffener is located on a side of the sidewall of the first and second carriers proximate to the first side.

By arranging the reinforcing member on the side of the side wall of the first bearing member and the side wall of the second bearing member close to the first side, the arrangement of the reinforcing member is not easy to have great influence on the arrangement of the parts in the accommodating cavity.

In some implementations of the application, the stiffener is located on the upper side of the first carrier and the second carrier.

By locating the stiffener on the upper side of one of the first and second carriers, the weight carried by the stiffener can better act on the upper side of the other of the first and second carriers, and the other of the first and second carriers can better support the stiffener, which is beneficial to improving the stress condition of the connection position of the stiffener with the first and second carriers.

In some implementations of the application, the second carrier and the first carrier are each in a beam structure, and an end face of one end of the second carrier is fixedly connected to a circumferential outer surface of the first carrier.

The second bearing piece and the first bearing piece are of beam structures, so that the second bearing piece and the first bearing piece can be conveniently manufactured. Through making the terminal surface of one end of second carrier and the circumference external surface fixed connection of first carrier, fixed connection between first carrier and the second carrier realizes conveniently, and first carrier and second carrier occupy the space less on the thickness direction of the lateral wall of first side, and the extension route of first carrier and the extension route of second carrier are crossed, are favorable to making first carrier and second carrier produce stronger bearing capacity jointly.

In some implementations of the application, the stiffener is located on the same side of the second carrier as the first carrier in a thickness direction of the sidewall of the first side, and the stiffener includes a first extension extending along the second carrier and beyond the second carrier in an extending direction of the second carrier to connect with the first carrier.

Through making along the thickness direction of the lateral wall of first side, the reinforcement is located the same side of second carrier and first carrier for the reinforcement is connected with the great surface of first carrier and second carrier area, is favorable to making the reinforcement have great area of contact between first carrier and the second carrier, thereby is favorable to improving the steadiness of reinforcement installation. The first extension part extends along the second bearing piece, so that the contact area between the reinforcing piece and the second bearing piece is increased, and the stability of the installation of the reinforcing piece is improved.

In some implementations of the application, the second carrier is fixedly connected to both sides of the first carrier along a first radial direction of the first carrier.

The second bearing pieces are fixedly connected to the side surfaces of the two sides of the first bearing piece, so that the bearing capacity of the first bearing piece and the bearing capacity of the second bearing piece can be increased.

In some implementations of the application, two ends of the reinforcement member are fixedly connected to the second bearing members on two sides of the first bearing member along the first radial direction, respectively, and a middle portion of the reinforcement member is fixedly connected to the first bearing member.

Through making along first radial, the both ends of reinforcement respectively with the second carrier fixed connection of first carrier both sides, the middle part and the first carrier fixed connection of reinforcement, the fixed connection between first carrier and the both sides second carrier consolidates through same reinforcement, and the structure is comparatively simple, and the wholeness of reinforcement is stronger, and the installation steadiness is higher.

In some implementations of the application, the stiffener further includes a second extension formed in a middle portion of the stiffener in the first radial direction, an extension path of the second extension matches the first carrier, and the second extension is fixedly connected to the first carrier.

By making the stiffener include the second extension, the contact area of the stiffener and the first carrier is advantageously increased, and the installation stability of the stiffener is advantageously increased.

In some implementations of the application, the reinforcement is formed with second extensions at both ends along the extension direction of the first carrier.

Through making along the extending direction of first carrier, both ends of reinforcement all are formed with second extension, are favorable to improving the area of contact of reinforcement and first carrier, are favorable to improving the installation steadiness of reinforcement.

In some implementations of the present application, the connecting member is connected to the first carrier through a sidewall of the first side, and an arrangement direction of the connecting member and the second carrier is an extension direction of the second carrier.

The connecting piece passes through the side wall of the first side to be connected with the first bearing piece, so that the convenience of installation of the connecting piece is improved. The connecting piece is connected with the first bearing piece in the extending direction of the second bearing piece, namely, the connecting piece is positioned at the position corresponding to the second bearing piece, so that the connecting piece is connected with the part with larger strength on the first bearing piece, and the stability of installation is improved.

In some implementations of the application, the battery case further includes a first fastener penetrating the first end of the stiffener and the first carrier to fixedly connect the first end of the stiffener to the first carrier; and/or, the device further comprises a second fastener, wherein the second fastener penetrates through the second end of the reinforcement and the second bearing piece so as to enable the second end of the reinforcement to be fixedly connected with the second bearing piece.

Through making the reinforcement be connected with first carrier and/or second carrier through the fastener, the installation of reinforcement is comparatively convenient, and the steadiness is higher.

In a second aspect, the application provides a battery, which comprises a battery cell and the battery box provided in the first aspect. Wherein, the battery monomer sets up in the battery box.

The battery provided by the application comprises the battery box body provided by the first aspect of the application, and can achieve the same effect, namely, the reliability of the battery box body can be improved.

In a third aspect, the present application provides an energy storage battery system comprising a target device and a battery provided in the second aspect of the present application, one end of a connector being connected to the target device through a wall of the tank.

The energy storage battery system provided by the application comprises the battery provided by the second aspect of the application, and can achieve the same effect, namely, the reliability of the battery box body can be improved.

In a fourth aspect, the present application provides an electric device, where the electric device includes a target device and a battery provided in the second aspect of the present application, and one end of the connecting member is connected to the target device through the wall of the case, and the battery is used to supply power to the target device.

The electric equipment provided by the application comprises the battery provided by the second aspect of the application, so that the same effect can be achieved, namely, the reliability of the battery box body can be improved.

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 one of the exploded views of a battery pack in some embodiments of the application;

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

FIG. 3 is a schematic diagram of a battery case according to some embodiments of the present application;

FIG. 4 is a schematic illustration of the attachment of a stiffener to a carrier according to some embodiments of the present application;

FIG. 5 is one of the exploded views of a battery compartment in some embodiments of the application;

FIG. 6 is a second exploded view of a battery case according to some embodiments of the present application;

FIG. 7 is an exploded view of a stiffener to carrier connection in some embodiments of the present application;

FIG. 8 is a third exploded view of a battery compartment in accordance with some embodiments of the application;

FIG. 9 is a second schematic diagram of a battery case according to some embodiments of the present application;

fig. 10 is a cross-sectional view at D-D in fig. 9.

Reference numerals illustrate:

01-a battery module; 1-a box wall; 11-a box body; 111-a first through hole; 112-a first sidewall; 113-opening; 12-case cover; 2-a first carrier; 21-an abutment surface; 22-mounting holes; 3-a second carrier; 4-connecting piece; 41-connecting holes; 42-a first end face; 5-reinforcement; 51-a second extension; 511-mounting slots; 5111-bottom wall of mounting groove; 51111-a second through hole; 52-a first extension; 6-connecting columns; 61-a first column section; 62-a second column section; 7-a first fastener; 8-a second fastener; 9-mounting; a-a first direction; b-a second direction; c-axial direction of the connecting hole.

Detailed Description

Embodiments of the technical scheme 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 aspects of the present application, and thus are merely examples, and are not intended to limit 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

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 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 embodiments of the application, the technical steps may be interchanged with one another in a particular order or sequence without conflict, such that embodiments of the application described herein may be practiced otherwise than as illustrated or described.

In the description of embodiments of the present application, the technical terms "first," "second," "third," etc. are used merely to distinguish between objects and should not 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 some embodiments of the present application, "first," "second," "third," etc. may also refer to the same object. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should 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 specific circumstances.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the term "abutting" is to be understood in a broad sense as either direct contact, contact across an intermediate layer, contact with substantially no interaction force between two in contact, or contact with interaction force between two in contact.

The present application will be described in detail below.

The following analysis is performed on the reasons for the insufficient reliability of the battery box installed on the target device in the related art, and the analysis process and the conclusion are all part of the inventive aspects of the present application.

In the related art, a plurality of bearing members are generally arranged on the wall of the battery box body, and the bearing members are only connected together in a welding mode and the like to jointly bear the wall and parts inside the battery box body. However, the connection between the plurality of carriers is not stable enough and there is a risk of disconnection, such as easy cracking of the weld, especially after a certain number of battery cycles, the battery case expands and the weld is easily broken by force. After the welding parts among the plurality of bearing parts are cracked, the plurality of bearing parts hardly bear the box wall and the parts inside the battery box body together and firmly, and the box body is easy to damage.

The embodiment of the application provides a battery box body, which comprises a box wall, a first bearing piece, a second bearing piece, a connecting piece and a reinforcing piece. Wherein, the wall of the box is enclosed to form a containing cavity; the first bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall; the second bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall and the first bearing piece; one end of the connecting piece is connected with at least one of the first bearing piece and the second bearing piece, and the other end of the connecting piece penetrates through the box wall to be connected with a target device; the reinforcement piece is of a split type structure with the first bearing piece and the second bearing piece and is fixedly connected with the first bearing piece and the second bearing piece. Through making reinforcement and first carrier and second carrier fixed connection, the connection between first carrier and the second carrier has strengthened for first carrier and second carrier bearing capacity increase, first carrier and second carrier can bear the weight of the spare part of wall and battery box inside firmly, are favorable to improving the reliability of battery box.

The battery box body provided by the application is suitable for a battery, and the battery comprises a battery monomer and the battery box body. Wherein, the battery monomer sets up in the battery box.

In the embodiment of the application, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell which can activate the active material in a charging mode to continue to use after the battery cell discharges.

The battery cell may be a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited by the embodiment of the application.

As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, and the prismatic battery cell includes a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, etc., and the present application is not particularly limited.

Typically, the number of the battery cells is at least two, and at least two battery cell arrays are distributed and connected in series, parallel or series-parallel through the bus bar. The battery provided by the application can be a battery module, a battery pack or the like. The battery box body can be a box body of a battery module or a box body of a battery pack, etc.

The battery provided by the application is suitable for electric equipment, the electric equipment comprises a target device and a battery, one end of a connecting piece penetrates through the wall of the box to be connected with the target device, and the battery is used for supplying power to the target device. For example, the powered device may be a cell phone, a portable device, a notebook computer, a battery car, an electric toy, an electric tool, a vehicle, a ship, a spacecraft, etc., for example, a spacecraft including an airplane, a rocket, a space shuttle, a spacecraft, etc. Illustratively, in some embodiments of the application, the powered device is a vehicle, the target device is a vehicle floor, the battery is disposed on an underside of the vehicle floor, and one end of the connector is connected to the vehicle floor through the tank wall. In this way, the battery is mounted on the vehicle body.

The battery provided by the application is suitable for an energy storage battery system, the energy storage battery system comprises a target device and a battery, and one end of a connecting piece penetrates through a box wall to be connected with the target device. The energy storage battery system can be an energy storage container or an energy storage electric cabinet.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, 2, 3 and 4, the present application provides a battery box 11, where the battery box 11 includes a wall 1, a first carrier 2, a second carrier 3, a connecting member 4 and a reinforcing member 5. Wherein, the box wall 1 is enclosed to form a containing cavity; the first bearing piece 2 is arranged in the accommodating cavity and is fixedly connected with the box wall 1; the second bearing piece 3 is arranged in the accommodating cavity and is fixedly connected with the box wall 1 and the first bearing piece 2; one end of the connecting member 4 is connected to at least one of the first carrier 2 and the second carrier 3, and the other end passes through the tank wall 1 for connection with a target device; the reinforcement 5 is of a split structure with the first carrier 2 and the second carrier 3, and is fixedly connected with the first carrier 2 and the second carrier 3.

The accommodating cavity in the embodiment of the application is used for accommodating the battery cells. In some embodiments of the present application, the accommodating chamber is used for accommodating the battery module 01, and the battery module 01 is formed by connecting at least two battery cells distributed in an array in series, in parallel or in series-parallel through the bus bar.

The first bearing member 2 and the second bearing member 3 in the embodiment of the present application are used for bearing the weight of the tank wall 1 and the weight of the components in the accommodating cavity, such as the battery cells, and the strength and the rigidity of the bearing members are generally larger than those of the tank wall 1.

The first carrier 2 and the second carrier 3 in the embodiment of the present application may be fixedly connected to the wall 1 in various manners, and may be, for example, welded or connected by fasteners. By fixedly connecting the first carrier 2 and the second carrier 3 to the wall 1, the weight of the wall 1 can act on the first carrier 2 and the second carrier 3, and the weight of the components in the receiving space, such as the battery cells, can also act on the first carrier 2 and the second carrier 3 via the wall 1.

Generally, the wall 1 includes a case 11 and a case cover 12, the case 11 has an opening 113, and the case cover 12 is detachably connected to the case 11, and is capable of closing the opening 113 and enclosing the case 11 to form a receiving chamber. The first bearing member 2 and the second bearing member 3 in the embodiment of the present application may be fixedly connected to the case cover 12, or may be fixedly connected to the case 11.

The second carrier 3 and the first carrier 2 may be fixedly connected in various manners, such as welding, clamping, screwing, interference fit, fastening, etc. By the fixed connection of the second carrier 3 with the first carrier 2, the forces of the tank wall 1 acting on the first carrier 2 can be transferred to the second carrier 3 via the connection between the second carrier 3 and the first carrier 2, and the forces of the tank wall 1 acting on the second carrier 3 can also be transferred to the first carrier 2 via the connection between the second carrier 3 and the first carrier 2. It should be explained that, the above-mentioned first carrier 2 is fixedly connected with the second carrier 3, which means that the first carrier 2 is fixedly connected with the second carrier 3, specifically, directly, and not that the second carrier 3 is fixedly connected with the first carrier 2 through the reinforcing member 5, or that the first carrier 2 is fixedly connected with the second carrier 3 through the wall 1.

In the embodiment of the present application, the second carrier 3 and the first carrier 2 are two different carriers, so the fixed connection between the second carrier 3 and the first carrier 2 does not include the integral formation of the second carrier 3 and the first carrier 2.

The connector 4 in the embodiment of the present application mounts the battery case 11 on the target device. The weight of the wall 1 and the weight of the components in the receiving cavity, such as the battery cells, act on the first carrier 2 and the second carrier 3, one end of the connecting member 4 is connected to at least one of the first carrier 2 and the second carrier 3, and the other end passes through the wall 1 for connection with the target device, so that the first carrier 2 and the second carrier 3 transfer the weight to the connecting member 4, and the connecting member 4 transfers the weight to the target device. Illustratively, in some embodiments of the application, the connector 4 is connected to the first carrier 2. In this way, the weight of the wall 1 and the weight of the components in the receiving cavity, such as the battery cells, will be transferred to the first carrier 2, then to the connector 4 from the first carrier 2, and finally to the target device from the connector 4. In some embodiments of the present application, the battery case 11 further includes a mounting member 9, and the mounting member 9 is screwed with the connection member 4 through the target device such that the target device is supported between the mounting member 9 and the connection member 4 in the axial direction of the screw connection, and the battery case 11 is mounted on the target device.

The reinforcement 5 in the embodiment of the application serves to improve the stress situation of the fixed connection between the first carrier 2 and the second carrier 3. So that the forces of the tank wall 1 acting on the first carrier 2 can also be transmitted to the second carrier 3 via the reinforcement 5, and the forces of the tank wall 1 acting on the second carrier 3 can also be transmitted to the first carrier 2 via the reinforcement 5. It should be noted that, the reinforcement member 5 is fixedly connected to the first carrier member 2 and the second carrier member 3, which means that the first carrier member 2 and the second carrier member 3 are directly and fixedly connected to the reinforcement member 5, such as welding, clamping, screwing, interference fit, fastening, and the like, and the reinforcement member 5 is not connected to the first carrier member 2 and the second carrier member 3 through the wall 1 or the connecting member 4, that is, the first carrier member 2 does not need to transmit a force to the reinforcement member 5 through the wall 1 or the connecting member 4, and the like.

Through making reinforcement 5 and first carrier 2 and second carrier 3 fixed connection, the connection between first carrier 2 and the second carrier 3 has strengthened for first carrier 2 and second carrier 3 bearing capacity increase, first carrier 2 and second carrier 3 can firmly bear the weight of the spare part of wall 1 and battery box 11 inside, are favorable to improving the reliability of battery box 11.

In some embodiments of the present application, referring to fig. 1, 2, 3 and 4, the connecting member 4 is fixedly connected to the reinforcing member 5, so that at least one other of the first carrier 2 and the second carrier 3 is fixedly connected to the connecting member 4 through the reinforcing member 5.

The connecting piece 4 and the reinforcing piece 5 in the embodiment of the present application are fixedly connected, that is, the connecting piece 4 and the reinforcing piece 5 are directly and fixedly connected, such as welding, clamping, threaded connection, interference fit or fastening connection, etc., and it does not mean that the connecting piece 4 is fixedly connected with the reinforcing piece 5 through the first bearing piece 2 or the second bearing piece 3, that is, at least one of the first bearing piece 2 and the second bearing piece 3 and the reinforcing piece 5 are connected with the connecting piece 4. Illustratively, in some embodiments of the application, the connector 4 is connected to the first carrier 2. In this way, in the weight of the wall 1 and the weight of the components in the housing, such as the battery cells, a part of the weight acting on the second carrier 3 is transferred to the first carrier 2, and then to the connecting piece 4 from the first carrier 2, and another part is transferred directly to the connecting piece 4 through the reinforcement 5.

By fixedly connecting the connecting member 4 with the reinforcing member 5, the load borne by at least the other of the first bearing member 2 and the second bearing member 3 can be directly transmitted to the connecting member 4 through the reinforcing member 5, and the load can be transmitted to the connecting member without passing through at least one of the first bearing member 2 and the second bearing member 3, which is beneficial to improving the stress of the structure for fixedly connecting the first bearing member 2 and the second bearing member 3, thereby being beneficial to improving the reliability of the battery case 11.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, one of the first carrier 2 and the connecting member 4 is formed with a connecting hole 41, and the other includes an abutment surface 21, and a boss is disposed on the abutment surface 21 and is in threaded engagement with the connecting hole 41; the reinforcing member 5 is supported between the abutment surface 21 and the end face of the first end of the connecting hole 41 in the axial direction c of the connecting hole so that the reinforcing member 5 is fixedly connected to the connecting member 4.

The boss in the embodiment of the present application is a structure protruding along the abutment surface 21 toward the opposite abutment surface 21.

The end surface of the first end of the connecting hole 41 in the embodiment of the present application refers to the first end surface 42 in the drawing, and it is understood that the boss extends into the connecting hole 41 through the first end of the connecting hole 41 to be in threaded engagement with the connecting hole 41.

The first bearing member 2 and the connecting member 4 in the embodiment of the present application are connected, and the load of the first bearing member 2 is transferred to the connecting member 4 through the boss and the connecting hole 41. The second carrier 3 may not be directly connected to the connection member 4, and the load of the second carrier 3 is partially transmitted to the connection member 4 through the first carrier 2 and partially transmitted to the connection member 4 through the reinforcement member 5.

By supporting the reinforcement 5 between the abutment surface 21 and the end surface of the first end of the connection hole 41, the reinforcement 5 will generate a large friction force with the end surface of the first end of the connection hole 41 and the abutment surface 21, so that the reinforcement 5 is fixedly connected with the connection piece 4, which makes the installation of the reinforcement 5 and the connection piece 4 relatively stable. Moreover, the connection between the reinforcing member 5 and the connecting member 4 is realized by utilizing the connection between the connecting member 4 and the first bearing member 2, so that the fixed connection between the reinforcing member 5 and the connecting member 4 is convenient.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, a second through hole 51111 is formed in the reinforcement 5, and the protruding pillar is disposed through the second through hole 51111. In this way, it is advantageous to improve the stability of the installation of the reinforcing member 5. In some embodiments of the application, the stud may mate with the second through hole 51111. In this way, it is advantageous to improve the stability of the installation of the reinforcing member 5.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, a connection hole 41 is formed on the connection member 4, a mounting hole 22 is formed on the first carrier member 2, the mounting hole 22 is coaxial with the connection hole 41 and is a through hole, an end surface of one end of the mounting hole 22 is an abutment surface 21, the battery case 11 further includes a connection post 6, the connection post 6 includes a first post segment 61 and a second post segment 62, the first post segment 61 is disposed in the mounting hole 22 in a penetrating manner and protrudes along an axial direction of the mounting hole 22 relative to the abutment surface 21, a protruding portion of the first post segment 61 along the axial direction of the mounting hole 22 relative to the abutment surface 21 is a protruding post, and the second post segment 62 is fixedly connected with the first post segment 61 and abuts against an end surface of the mounting hole 22 facing away from the connection hole 41. Thus, the protruding column is realized in the direction of penetrating the connecting column 6 in the mounting hole 22, and the processing and the manufacturing are convenient.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the first post segment 61 mates with the mounting aperture 22. In this way, the stability of the installation is advantageously improved.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the reinforcement member 5 is formed with a mounting groove 511, the depth direction of the mounting groove 511 is the axial direction c of the connection hole, and the connection member 4 is directed to the first carrier member 2, and along the axial direction c of the connection hole, a bottom wall 5111 of the mounting groove is supported between the abutment surface 21 and the end surface of the first end of the connection hole 41.

By forming the mounting groove 511 on the reinforcing member 5, the depth direction of the mounting groove 511 is directed toward the first carrier member 2 by the connecting member 4, and the bottom wall 5111 of the mounting groove is supported between the abutment surface 21 and the end face of the first end of the connecting hole 41, so that the connecting member 4 is stably mounted in the mounting groove 511, which is advantageous for improving the stability of the mounting of the reinforcing member 5 and the connecting member 4. Furthermore, the provision of the mounting groove 511 is also advantageous in reducing the extension length of the boss, improving the rigidity of the boss, improving the stress condition of the boss, and improving the stability of the mounting of the reinforcing member 5 and the connecting member 4.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the connection member 4 extends along the axial direction c of the connection hole to be connected with the target device through the tank wall 1 along the axial direction c of the connection hole.

By extending the connecting member 4 in the axial direction c of the connecting hole, the first through hole 111 of the wall 1 for passing the connecting member 4 is coaxial with the connecting hole 41, which is advantageous in improving the convenience of installation of the connecting member 4. Taking the case that the connecting hole 41 is formed on the connecting piece 4 as an example, in the process of installing the connecting piece 4, the connecting piece 4 can pass through the first penetrating hole 111 and move to the position of the convex column along the axial direction of the first penetrating hole 111 towards the position close to the convex column, then the connecting piece 4 rotates around the axial line of the first penetrating hole 111, so that the convex column is gradually screwed into the connecting hole 41, and the connecting hole 41 is in threaded fit with the convex column.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the first carrier 2 and the second carrier 3 extend along a sidewall of the first side of the accommodating cavity, and along an extending direction of the sidewall of the first side, one ends of the first carrier 2 and the second carrier 3 close to each other are fixedly connected.

In the embodiment of the application, the sidewall of the first side is referred to as a first sidewall 112 in the figure. The side wall of the first side may be a side wall of either side of the accommodation chamber, for example, may be a side wall of one side in the vertical direction such as an upper side wall or a lower side wall, may be a side wall of one side in the horizontal direction, or the like.

By extending the first bearing member 2 and the second bearing member 3 along the side wall of the first side of the accommodating cavity, the contact area between the tank wall 1 and the first bearing member 2 and the second bearing member 3 is larger, and the stress condition of the connection position of the tank wall 1 and the first bearing member 2 and the second bearing member 3 is improved. By fixedly connecting the ends of the first bearing member 2 and the second bearing member 3, which are close to each other, along the extending direction of the side wall of the first side, the space occupied by the first bearing member 2 and the second bearing member 3 in the thickness direction of the side wall of the first side is small, and the energy density of the battery is improved.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, along the extending direction of the side wall of the first side, the end surfaces of the ends of the first carrier 2 and the second carrier 3, which are close to each other, are fixedly connected. In this way, it is advantageous to further reduce the space occupied by the first carrier 2 and the second carrier 3 in the thickness direction of the side wall of the first side, and to increase the energy density of the battery.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the reinforcement member 5 is located on the same side of the first carrier 2 and the second carrier 3 along the thickness direction of the sidewall of the first side.

In the embodiment of the present application, it is understood that in the case where the reinforcing member 5 is supported between the abutting surface 21 and the first end surface 42, the abutting surface 21 and the first end surface 42 are disposed opposite to each other in the thickness direction of the side wall of the first side, and the abutting surface 21 and the first end surface 42 are located on the same side as the first carrier 2 and the second carrier 3. Illustratively, an abutment surface 21 is formed on the first carrier 2, the abutment surface 21 being an end surface of one end of the first carrier 2 in the thickness direction of the sidewall of the first side.

By locating the stiffener 5 on the same side of the first carrier 2 and the second carrier 3 in the thickness direction of the sidewall on the first side, the stiffener 5 is connected to the surface of the first carrier 2 and the second carrier 3 with a larger area, which is beneficial to making the stiffener 5 have a larger contact area with the first carrier 2 and the second carrier 3, thereby being beneficial to improving the installation stability of the stiffener 5. It will be appreciated that making the area of the side surfaces of the first and second carriers 2, 3 on the side of the thickness of the first side wall 112 larger, the first and second carriers 2, 3 do not occupy a larger space in the thickness direction of the first side wall 112, which is advantageous for the energy density of the battery, and therefore the area of the side surfaces of the first and second carriers 2, 3 on the side of the thickness of the first side wall 112 may be set larger, so that the reinforcement member 5 is connected to this surface, i.e., in the thickness direction of the side wall of the first side, on the same side as the first and second carriers 2, 3, which is advantageous for making the reinforcement member 5 have a larger contact area with the first and second carriers 2, 3, which is advantageous for improving the stability of the installation of the reinforcement member 5.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the stiffener 5 is located on one side of the side wall of the first carrier 2 and the second carrier 3 near the first side.

By locating the stiffener 5 on the side of the side walls of the first carrier 2 and the second carrier 3 close to the first side, the arrangement of the stiffener 5 is less likely to have a large influence on the arrangement of the components in the receiving cavity.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the stiffener 5 is located on the upper sides of the first carrier 2 and the second carrier 3.

By locating the reinforcement 5 on the upper side of the first carrier 2 and the second carrier 3, the weight borne by one of the first carrier 2 and the second carrier 3 can better act on the upper side of the other of the first carrier 2 and the second carrier 3 through the reinforcement 5, and the other of the first carrier 2 and the second carrier 3 can better support the reinforcement 5, which is beneficial to improving the stress condition of the connection position of the reinforcement 5 and the first carrier 2 and the second carrier 3.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the second carrier 3 and the first carrier 2 are both in beam structures, and an end surface of one end of the second carrier 3 is fixedly connected to a circumferential outer surface of the first carrier 2.

In the embodiment of the present application, the extending direction of the first carrier 2 is referred to as a first direction a in the figure, and the extending direction of the second carrier 3 is referred to as a second direction b in the figure.

In the embodiment of the present application, the end face of one end of the second carrier 3 is the end face of one end of the second carrier 3 in the extending direction thereof, the circumference of the first carrier 2 is referred to the extending direction of the first carrier 2, and the circumference of the first carrier 2 is the circumference of the extending direction of the first carrier 2.

In the embodiment of the present application, the first bearing member 2 may be a cross beam of the battery pack, and the second bearing member 3 may be a longitudinal beam of the battery pack. The first carrier 2 may also be a longitudinal beam of a battery pack, and the second carrier 3 may be a transverse beam of a battery pack.

By making both the second carrier 3 and the first carrier 2 in a beam structure, the manufacturing of the second carrier 3 and the first carrier 2 is facilitated. Through making the terminal surface of one end of second carrier 3 and the circumference external surface fixed connection of first carrier 2, fixed connection between first carrier 2 and the second carrier 3 realizes conveniently, and first carrier 2 and second carrier 3 occupy the space less in the thickness direction of the lateral wall of first side, and the extending path of first carrier 2 and the extending path of second carrier 3 are crossed, are favorable to making first carrier 2 and second carrier 3 produce stronger bearing capacity jointly.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the extending direction of the first carrier 2 is perpendicular to the extending direction of the second carrier 3. In this way, it is advantageous to further increase the carrying capacity of the first carrier 2 and the second carrier 3 together.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the reinforcement member 5 is located on the same side of the second carrier 3 and the first carrier 2 along the thickness direction of the sidewall of the first side, and the reinforcement member 5 includes a first extension portion 52, wherein the first extension portion 52 extends along the second carrier 3 and exceeds the second carrier 3 along the extending direction of the second carrier 3 to connect with the first carrier 2.

The first extension 52 in the embodiment of the present application extends beyond the second carrier 3 along the extending direction of the second carrier 3 to connect with the first carrier 2, that is, the portion of the first extension 52 extending beyond the second carrier 3 along the extending direction of the second carrier 3 connects with the first carrier 2.

By locating the stiffener 5 on the same side of the second carrier 3 and the first carrier 2 in the thickness direction of the sidewall on the first side, the stiffener 5 is connected to the surface of the first carrier 2 and the second carrier 3 with a larger area, which is beneficial to making the stiffener 5 have a larger contact area with the first carrier 2 and the second carrier 3, thereby being beneficial to improving the installation stability of the stiffener 5. The first extension 52 extends along the second carrier 3, which is beneficial to increasing the contact area between the reinforcement 5 and the second carrier 3, thereby being beneficial to improving the installation stability of the reinforcement 5.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the first extension 52 is connected to the second carrier 3 by the second fastener 8. Thus, the installation is convenient and reliable.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, along a first radial direction of the first carrier 2, the second carrier 3 is fixedly connected to two sides of the first carrier 2.

In the embodiment of the application, the first radial direction is the extending direction of the first sidewall 112 and is perpendicular to the extending direction of the first carrier 2. In some embodiments of the application, the first radial direction may be the same as the direction of extension of the second carrier 3.

The second bearing member 3 is fixedly connected to the side surfaces of the two sides of the first bearing member 2, so that the bearing capacity of the first bearing member 2 and the second bearing member 3 can be increased.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, two ends of the reinforcement member 5 are fixedly connected to the second carrier 3 at two sides of the first carrier 2 along the first radial direction, and a middle portion of the reinforcement member 5 is fixedly connected to the first carrier 2.

In the embodiment of the present application, in the fixed connection between the two ends of the reinforcement member 5 and the second bearing members 3 on two sides of the first bearing member 2, the second bearing members 3 on two sides refer to two second bearing members 3 which are respectively and fixedly connected with the side surfaces on two sides of the first bearing member 2 along the first radial direction of the first bearing member 2.

Through making along first radial, the both ends of reinforcement 5 respectively with the second carrier 3 fixed connection of first carrier 2 both sides, the middle part and the first carrier 2 fixed connection of reinforcement 5, the fixed connection between first carrier 2 and the both sides second carrier 3 consolidates through same reinforcement 5, and the structure is comparatively simple, and the wholeness of reinforcement 5 is stronger, and the installation steadiness is higher.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the reinforcement member 5 further includes a second extension portion 51, wherein the second extension portion 51 is formed at a middle portion of the reinforcement member 5 along the first radial direction, an extension path of the second extension portion 51 is matched with the first carrier 2, and the second extension portion 51 is fixedly connected with the first carrier 2.

By including the reinforcing member 5 with the second extending portion 51, it is advantageous to increase the contact area of the reinforcing member 5 with the first carrier 2, and to increase the mounting stability of the reinforcing member 5.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the second extension 51 is connected to the first carrier 2 by the first fastener 7. Thus, the installation is convenient and reliable.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the second extending portions 51 are formed at two ends of the reinforcement member 5 along the extending direction of the first carrier member 2.

By forming the second extending portions 51 at both ends of the reinforcing member 5 along the extending direction of the first bearing member 2, the contact area between the reinforcing member 5 and the first bearing member 2 is advantageously increased, and the installation stability of the reinforcing member 5 is advantageously improved.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the connecting member 4 passes through the sidewall of the first side to be connected with the first carrier 2, and the arrangement direction of the connecting member 4 and the second carrier 3 is the extending direction of the second carrier 3.

By connecting the connecting member 4 with the first carrier member 2 through the side wall of the first side, it is advantageous to improve the convenience of installation of the connecting member 4. The arrangement direction of the connecting piece 4 and the second bearing piece 3 is the extending direction of the second bearing piece 3, namely, the connecting piece 4 is connected with the first bearing piece 2 and is positioned at the position corresponding to the second bearing piece 3, so that the connecting piece 4 is connected with a part with larger strength on the first bearing piece 2, and the installation stability is improved. It will be appreciated that the portion of the first carrier 2 which is connected to the second carrier 3 is stronger and the connection 4 is connected thereto, which is advantageous for improving the stability of the installation.

In some embodiments of the present application, referring to fig. 5, 6, 7 and 8, the battery case 11 further includes a first fastener 7, where the first fastener 7 is disposed through the first end of the reinforcement member 5 and the first carrier 2, so that the first end of the reinforcement member 5 is fixedly connected to the first carrier 2; and/or, the device further comprises a second fastener 8, wherein the second fastener 8 is arranged on the second end of the reinforcement member 5 and the second bearing member 3 in a penetrating way, so that the second end of the reinforcement member 5 is fixedly connected with the second bearing member 3.

The first fastener 7 and the second fastener 8 in the embodiment of the present application may be rivets, screws, bolts or the like.

By connecting the reinforcement 5 with the first carrier 2 and/or the second carrier 3 via fasteners, the reinforcement 5 is easier to install and more stable.

In some embodiments of the present application, referring to fig. 9 and 10, the first carrier 2 and the second carrier 3 extend along the upper sidewall of the accommodating cavity, and the extending direction is vertical, an end surface of one end of the second carrier 3 is fixedly connected with the circumferential outer surface of the first carrier 2, and the second carrier 3 is fixedly connected to the side surfaces of both sides of the first carrier 2 along the first radial direction of the first carrier 2. The reinforcement 5 is located on the upper side of the first carrier 2 and the second carrier 3. The reinforcement 5 includes a first extension portion 52, the first extension portion 52 extends along the second carrier 3, and two ends of the reinforcement 5 are respectively connected with the second carriers 3 on two sides of the first carrier 2 through fasteners along the extending direction of the second carrier 3. The reinforcement 5 further includes a second extension portion 51, the second extension portion 51 is formed in the middle of the reinforcement 5 in the extension direction of the second carrier 3, the extension path of the second extension portion 51 is matched with that of the first carrier 2, the second extension portion 51 is connected with the first carrier 2 through a fastener, and the second extension portions 51 are formed at two ends of the reinforcement 5 along the extension direction of the first carrier 2. The connecting piece 4 passes through the upper side wall of the accommodating cavity and is connected with the first bearing piece 2, and the arrangement direction of the connecting piece 4 and the second bearing piece 3 is the extending direction of the second bearing piece 3. The first bearing piece 2 comprises an abutting surface 21, a convex column is arranged on the abutting surface 21, a connecting hole 41 is formed on the connecting piece 4, and the convex column is in threaded fit with the connecting hole 41; the reinforcing member 5 is supported between the abutment surface 21 and the end face of the first end of the connecting hole 41 in the axial direction c of the connecting hole so that the reinforcing member 5 is fixedly connected to the connecting member 4.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will 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 application, and they should be included in the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict, and the present application is not limited to the specific embodiments disclosed herein.

Claims

1. A battery box, comprising:

the box wall is enclosed to form a containing cavity;

The first bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall;

The second bearing piece is arranged in the accommodating cavity and is fixedly connected with the box wall and the first bearing piece;

A connecting member having one end connected to at least one of the first carrier and the second carrier and the other end penetrating through the tank wall for connection with a target device;

The reinforcing piece is in a split type structure with the first bearing piece and the second bearing piece and is fixedly connected with the first bearing piece and the second bearing piece.

2. The battery box of claim 1, wherein the connector is fixedly connected to the stiffener such that at least the other of the first carrier and the second carrier is fixedly connected to the connector by the stiffener.

3. The battery box according to claim 2, wherein one of the first bearing member and the connecting member is formed with a connecting hole, and the other one includes an abutment surface provided with a boss that is screw-fitted with the connecting hole; the reinforcement is supported between the abutment surface and the end surface of the first end of the connecting hole in the axial direction of the connecting hole, so that the reinforcement is fixedly connected with the connecting piece.

4. A battery box according to claim 3, wherein the reinforcing member is formed with a mounting groove having a depth direction which is an axial direction of the connecting hole and directed from the connecting member to the first bearing member, and a bottom wall of the mounting groove is supported between the abutting surface and an end face of the first end of the connecting hole in the axial direction of the connecting hole.

5. The battery box of claim 3 or 4, wherein the connection member extends in an axial direction of the connection hole to be connected with the target device through the box wall in the axial direction of the connection hole.

6. The battery box according to any one of claims 1 to 4, wherein the first carrying member and the second carrying member extend along a side wall of the first side of the accommodating cavity, and along an extending direction of the side wall of the first side, one ends of the first carrying member and the second carrying member, which are close to each other, are fixedly connected.

7. The battery case according to claim 6, wherein the reinforcement member is located on the same side of the first carrier and the second carrier in a thickness direction of the side wall of the first side.

8. The battery box of claim 7, wherein the stiffener is located on a side of the first carrier and the second carrier adjacent to the side wall of the first side.

9. The battery box of claim 8, wherein the stiffener is located on an upper side of the first carrier and the second carrier.

10. The battery box of claim 6, wherein the second carrier and the first carrier are both in a beam structure, and an end face of one end of the second carrier is fixedly connected with a circumferential outer surface of the first carrier.

11. The battery case according to claim 10, wherein the reinforcement member is located on the same side of the second carrier and the first carrier in a thickness direction of a side wall of the first side, the reinforcement member including a first extension portion extending along the second carrier and exceeding the second carrier in an extending direction of the second carrier to be connected with the first carrier.

12. The battery box of claim 11, wherein the second carrier is fixedly connected to the sides of both sides of the first carrier along a first radial direction of the first carrier.

13. The battery box of claim 12, wherein two ends of the reinforcement member are fixedly connected to the second bearing members on two sides of the first bearing member, respectively, in the first radial direction, and a middle portion of the reinforcement member is fixedly connected to the first bearing member.

14. The battery case according to claim 13, wherein the reinforcement further comprises a second extension portion formed at a central portion of the reinforcement in the first radial direction, an extension path of the second extension portion being matched with the first carrier, the second extension portion being fixedly connected with the first carrier.

15. The battery case according to claim 14, wherein the second extension portion is formed at both ends of the reinforcement member in the extension direction of the first carrier member.

16. The battery box of claim 10, wherein the connecting member is connected to the first carrier through a side wall of the first side, and an arrangement direction of the connecting member and the second carrier is an extension direction of the second carrier.

17. The battery box according to any one of claims 1 to 4, further comprising a first fastener penetrating through the first end of the reinforcement member and the first carrier member to fixedly connect the first end of the reinforcement member and the first carrier member; and/or, the device further comprises a second fastener, wherein the second fastener penetrates through the second end of the reinforcement and the second bearing piece, so that the second end of the reinforcement is fixedly connected with the second bearing piece.

18. A battery, comprising:

The battery case of any one of claims 1 to 17;

And the battery monomer is arranged in the battery box body.

19. An energy storage battery system, comprising:

a target device;

The battery of claim 18, one end of the connector being connected to the target device through the wall.

20. A powered device, comprising:

a target device;

the battery of claim 18, one end of the connector being connected to the target device through the wall, the battery being configured to power the target device.