CN221176521U

CN221176521U - Battery box, battery and power consumption device

Info

Publication number: CN221176521U
Application number: CN202420659953.8U
Authority: CN
Inventors: 阮生甡; 王勇
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-04-02
Filing date: 2024-04-02
Publication date: 2024-06-18
Anticipated expiration: 2034-04-02

Abstract

The application relates to the technical field of battery related equipment and discloses a battery box, a battery and an electric device, wherein the battery box comprises a body and an expansion beam, a containing cavity is formed in the body, and the body is provided with a first side wall and a second side wall which are opposite and are arranged at intervals; the expansion beam is arranged in the accommodating cavity, and two ends of the expansion beam are respectively connected with the first side wall and the second side wall; at least one of the first side wall and the second side wall is provided with a mounting groove towards the side face of the accommodating cavity, the notch of the mounting groove faces the accommodating cavity, the groove side wall of the mounting groove is provided with an assembly opening, the assembly opening penetrates through one end of the groove side wall towards the notch, the end part of the expansion beam is arranged in the mounting groove at the corresponding end, and the end part can be inserted into or removed from the corresponding mounting groove through the assembly opening. The problem that the expansion beam is limited by the distance between the first side wall and the second side wall to cause great assembly difficulty is solved, and the convenience of assembling the battery box body is improved.

Description

Battery box, battery and power consumption device

Technical Field

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

Background

This section provides merely background information related to the application, which is not necessarily prior art.

As the demand for clean energy rises, power batteries have been widely developed. The power battery generally comprises a battery box body and battery monomers arranged in the battery box body, the assembly convenience of the battery box body has important significance for the production of the power battery, and how to provide the assembly convenience of the battery box body is always a continuous concern in the battery research and development process.

Disclosure of utility model

In view of the above, the present application provides a battery case, a battery, and an electric device, which can improve the problem of inconvenient assembly of the battery case by improving the convenience of assembly of an expansion beam.

The first aspect of the application provides a battery box body, which comprises a body and an expansion beam, wherein a containing cavity is formed in the body, and the body is provided with a first side wall and a second side wall which are opposite and are arranged at intervals; the expansion beam is arranged in the accommodating cavity, and two ends of the expansion beam are respectively connected with the first side wall and the second side wall; the side that at least one of first lateral wall with the second lateral wall is towards hold the chamber is provided with the mounting groove, the notch orientation of mounting groove hold the chamber, be provided with the equipment mouth on the groove lateral wall of mounting groove, the equipment mouth link up the groove lateral wall is towards the one end of notch, the tip of expansion beam is located corresponding end in the mounting groove, just the tip can be passed through the equipment mouth inserts or shifts out corresponding the mounting groove.

According to the technical scheme, at least one of the first side wall and the second side wall is provided with the mounting groove towards the side face of the accommodating cavity, the groove side wall of the mounting groove is provided with the assembly opening, and the assembly opening is communicated with the notch of the mounting groove, so that in the assembly process of the expansion beam, the end part of at least one end of the expansion beam can be laterally inserted into the mounting groove along the assembly opening, the expansion beam enters between the first side wall and the second side wall, the assembly opening forms an avoidance space for the expansion beam to be inserted into the mounting groove, and the problem that the assembly difficulty is high due to the fact that the expansion beam is limited by the distance between the first side wall and the second side wall is solved, and the expansion beam can be assembled on the body after the body is assembled; and the assembly opening can play a guiding role in the assembly of the expansion beam, so that the convenience in the assembly of the expansion beam is improved, and the convenience in the assembly of the battery box body is improved.

In some embodiments of the present application, the side of the first side wall facing the accommodating cavity and the side of the second side wall facing the accommodating cavity are both provided with the mounting groove, and the orientation of the assembly opening of the first side wall is the same as the orientation of the assembly opening of the second side wall. The first side wall and the second side wall are both provided with the mounting groove, and the orientation of the assembly openings of the mounting grooves at the two ends is consistent, so that the expansion beam can be assembled into the mounting groove through the assembly openings at the two ends at the same time, the operation is convenient and quick, and the avoidance space can be formed in the same direction, so that the assembly convenience of the expansion beam is further improved.

In some embodiments of the present application, the battery case further includes a mounting member, and the mounting member is connected to a side surface of at least one of the first side wall and the second side wall facing the accommodating cavity, and the mounting member is provided with the mounting groove, or the side surface of the first side wall or the second side wall facing the accommodating cavity cooperates with the corresponding mounting member to form the mounting groove. According to the mounting groove, the mounting piece is arranged on the first side wall and/or the second side wall, the mounting groove is formed through the cooperation of the mounting piece or the independent formation of the mounting groove, the strength of the body cannot be affected, and the mounting groove is convenient to process and assemble.

In some embodiments of the present application, the mounting member includes a fixing plate portion and a groove wall portion, the side surface of the first side wall facing the accommodating cavity or the side surface of the second side wall facing the accommodating cavity is connected to the fixing plate portion, the groove wall portion is connected to a side of the fixing plate portion facing the accommodating cavity, and at least a part of the mounting groove is surrounded by the groove wall portion. The fixed plate part can improve the assembly convenience of the mounting piece, and the mounting piece is simple in structure and relatively saving consumable materials.

In some embodiments of the present application, a notch is provided on the fixing plate portion, the notch is surrounded by the groove wall plate portion along the circumference of the notch, and the mounting groove is formed by the groove wall plate portion and the fixing plate portion together surrounding the notch. The fixed plate part is provided with the notch and cooperates with the groove wall plate part to form the mounting groove, so that the mounting groove penetrates through opposite two surfaces of the fixed plate part, and the assembly opening is formed at the position corresponding to the notch of the fixed plate part, so that the assembly opening can penetrate through the fixed plate part and the groove wall plate part, and the assembly opening can extend from the inner side surface of the first side wall or the inner side surface of the second side wall to the accommodating cavity from the starting point, thereby being beneficial to the expansion beam to be attached to the inner wall of the first side wall or the second side wall to slide in the mounting groove, and improving the assembly convenience of the expansion beam.

In some embodiments of the present application, the side surface of the first side wall facing the accommodating cavity or the side surface of the second side wall facing the accommodating cavity is in fit connection with the corresponding plate surface of the fixing plate portion. The fixed plate part is connected with the inner side surface of the corresponding side wall in a bonding way, the connecting area between the fixed plate part and the inner side surface can be increased in a bonding way through glue bonding or welding, and the connecting stability of the mounting piece on the body is improved.

In some embodiments of the application, the fixed plate portion is of unitary construction with the channel wall portion. The fixed plate part and the groove wall plate part are of an integrated structure, so that the connection stability of the fixed plate part and the groove wall plate part can be improved, and the stability of the connection of the expansion beam and the body is further improved.

In some embodiments of the application, the body further comprises a bottom wall connected to the same end of the first side wall and the second side wall, and the assembly opening is disposed towards a side where the bottom wall is located or disposed towards a side where the assembly opening is located away from the bottom wall. The expansion beam is inserted into the mounting groove from the top end or the bottom end of the first side wall or the second side wall along the height direction of the body, and the operation is convenient.

In some embodiments of the present application, the mounting groove is disposed at an end of the first side wall or the second side wall facing the bottom wall, the assembly opening is disposed toward a side where the bottom wall is located, and the bottom wall covers the assembly opening. The mounting groove is close to the diapire setting, and the one side that the equipment mouth was located towards the diapire sets up, and the expansion beam can be directly along first lateral wall and the one end that the second lateral wall is close to the diapire insert the mounting groove through the equipment mouth, has improved the packaging efficiency and the equipment convenience of expansion beam, and the diapire covers the equipment mouth simultaneously, can have certain spacing effect to the expansion beam in the mounting groove, has improved the installation stability of expansion beam in the mounting groove.

In some embodiments of the application, the end of the expansion beam is clamped in the mounting groove; and/or the end part of the expansion beam is welded with the groove wall of the mounting groove; and/or the end part of the expansion beam is connected with the groove wall of the mounting groove through a fastener. Based on the guiding and limiting of the mounting groove, the assembly stability of the expansion beam and the body can be improved by further combining the modes of clamping, welding or fastening pieces and the like.

In some embodiments of the application, the end portion of the expansion beam is partially bulged to form a bulge, the bulge being disposed within the mounting groove. The protruding portion is formed by protruding the end part partially, compared with the mode that the whole end part is arranged in the mounting groove, the size of the mounting groove can be reduced, so that consumable materials forming the mounting groove are reduced, compared with the whole end part, the protruding portion slides in the mounting groove to have smaller resistance, and the assembly of the expansion beam is facilitated.

In some embodiments of the present application, the groove side wall of the mounting groove includes a first wall and a second wall, the first wall and the second wall are respectively disposed on two sides of the assembly opening along a first direction, and the first wall and the second wall both extend along an orientation of the assembly opening, and the first direction, the orientation of the assembly opening, and the orientation of the notch intersect two by two. The orientation that all follows the equipment mouth of first wall and second wall extends, and when the expansion beam inserted the mounting groove through the equipment mouth, can follow first wall and second wall and slide in to the mounting groove, first wall and second wall can play better guide effect, have improved the equipment convenience of expansion beam.

In some embodiments of the application, the first wall is disposed progressively obliquely away from the second wall in the orientation of the assembly port; and/or, the second wall is gradually inclined away from the first wall along the direction of the assembly opening. The first side wall can be obliquely arranged so that the assembly port forms a flaring structure; the second wall may also be inclined so that the assembly opening forms a flared structure, which facilitates insertion of the expansion beam into the assembly opening and along the assembly opening into the mounting slot.

In some embodiments of the application, the end portion of the expansion beam is partially bulged to form a bulge, the bulge being disposed within the mounting groove, and the bulge abutting between the first wall and the second wall in the first direction. The first wall and the second wall limit the movement of the protruding portion in the first direction, so that the expansion beam is fixed in the first direction, and the assembly stability of the expansion beam and the body is improved.

In some embodiments of the present application, the groove side wall of the mounting groove further includes a third wall, the third wall is connected between the first wall and the second wall, and is disposed opposite to the assembly port along the direction of the assembly port, and the protrusion abuts against the third wall. The third wall can limit the bulge to move along the direction facing away from the assembly opening, so that the assembly stability of the expansion beam and the body can be improved, and the installation position of the expansion beam in the direction facing the assembly opening can be positioned.

In some embodiments of the application, a groove bottom wall of the mounting groove abuts the projection in an orientation of the notch. The bottom wall of the groove can limit the expansion beam to move along the extending direction of the expansion beam, so that the assembly stability of the expansion beam and the body is improved.

In some embodiments of the present application, the number of the expansion beams is plural, the plural expansion beams are arranged at intervals, two ends of each expansion beam are respectively and correspondingly connected to the first side wall and the second side wall, and at least one end of each expansion beam is respectively and correspondingly provided with the mounting groove. A battery monomer is arranged between the adjacent expansion beams, so that two sides of the battery monomer can be abutted against the expansion beams to protect the battery box body; each expansion beam is installed through the corresponding installation groove, and the operation is convenient.

In some embodiments of the application, the side of the body facing away from the receiving cavity is provided with a loading connection. The loading connecting piece is used for fixing the battery on the electric device, such as a chassis of a vehicle, and by arranging the loading connecting piece, the connection convenience of the battery box body and the electric device can be improved, and the efficiency of the electric device for assembling the battery is improved.

The second aspect of the present application provides a battery, including a battery box and a battery unit, where the battery box is the battery box provided by the present application or any embodiment of the present application, and the battery unit is disposed in the accommodating cavity, and the battery unit is abutted to the expansion beam.

A third aspect of the application provides an electrical device comprising a battery according to the application or according to any of the embodiments of the application.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

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 figures. 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 provided in some embodiments of the application;

Fig. 3 is an exploded view of a battery cell according to some embodiments of the present application;

FIG. 4 is a partial block diagram of a battery compartment according to some embodiments of the application;

Fig. 5 is an enlarged view of a portion a of fig. 4;

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

fig. 7 is an enlarged view of a portion B of fig. 6;

FIG. 8 is a schematic view of a mounting member according to some embodiments of the present application;

FIG. 9 is a schematic view of a mounting member according to some embodiments of the present application;

fig. 10 is an enlarged view of a portion C of fig. 4;

fig. 11 is an enlarged view of a portion D of fig. 6;

FIG. 12 is a schematic view of an expansion beam according to some embodiments of the present application;

FIG. 13 is a schematic cross-sectional view of an end portion of an expansion beam disposed within a mounting slot in accordance with some embodiments of the present application;

FIG. 14 is a schematic view of an expansion beam according to some embodiments of the present application;

FIG. 15 is a schematic cross-sectional view of an end of an expansion beam disposed within a mounting slot according to some embodiments of the application.

Reference numerals in the specific embodiments are as follows:

1000. a vehicle;

100. A battery; 110. a battery case; 111. a first portion; 112. a second portion; 113. an expansion beam; 1131. an end portion; 1132. a protruding portion; 1133. a first end; 1134. a second end; 1135. a first expansion beam; 1136. a second expansion beam; 114. a body; 1141. a first sidewall; 1142. a second sidewall; 1143. a third sidewall; 1144. a fourth sidewall; 1145. a bottom wall; 115. a receiving chamber; 116. a mounting groove; 1161. a notch; 1162. an assembly port; 1163. a groove sidewall; 1164. a first wall; 1165. a second wall; 1166. a third wall; 1167. a bottom wall of the tank;

120. a battery cell; 121. an end cap; 122. an electrode terminal; 123. a pressure relief assembly; 124. a housing; 125. a cell assembly; 126. a tab;

130. A mounting member; 131. a fixed plate portion; 132. a trough wall plate portion; 133. a notch;

140. loading the connecting piece;

200. a controller;

300. a motor;

X1, length direction; y1, width direction; z1, the height direction; x2, the first direction.

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; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like 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 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 "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 addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means 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 description and simplification of the description, and do not indicate or imply 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 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.

The battery may store electrical energy and power the powered device. With the development of new energy, the application range of the battery is wider and wider, and the battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and a plurality of fields such as aerospace.

The battery may include a battery case for accommodating the battery cell and the battery cell. During use of the battery, the battery cells may expand due to charge and discharge or other factors. The expansion phenomenon of the battery monomer can possibly lead to deformation of a battery box body containing the battery monomer, influence the structural strength and the reliability of the battery box body, and also can influence the normal use of the battery due to the deformation of the battery box body, so as to influence the reliability of the battery.

In some technologies, an expansion beam is arranged in a battery box body to relieve the problem that a battery cell causes the battery box body to deform. The expansion beam is arranged in the battery box body and is used for being abutted with the battery cell so as to resist the expansion force of the battery cell, and the expansion beam can be arranged on two opposite side walls of the battery box body. When the battery is assembled, the expansion beam is assembled firstly, namely, the expansion beam is connected with the corresponding side wall, and then the side wall connected with the expansion beam is connected with other side walls of the battery box body. This is because, when the side walls of the battery are assembled first and then the expansion beam is assembled into the battery case, the expansion beam can only be inserted into the battery case from one end of the battery case, but the length of the expansion beam is equal to the distance between the two side walls connected to the expansion beam, and when the expansion beam is assembled into the battery case, the side walls of the battery case connected to the expansion beam are easy to interfere with each other, so that the expansion beam is difficult to assemble to a proper position, and the assembly effect of the expansion beam is affected.

The mode of assembling the expansion beam earlier is that after the side walls of the battery box body are connected with each other, the battery box body is easy to deform, and the frame of the battery box body cannot be integrally formed by the mode of assembling, and only a plurality of side walls can be mutually spliced and assembled, so that the assembling flexibility and convenience of the battery box body are poor.

In order to alleviate the problem of poor assembly flexibility and convenience of a battery box, the application provides the battery box, which comprises a body and an expansion beam, wherein a containing cavity is formed in the body, and the body is provided with a first side wall and a second side wall which are opposite and arranged at intervals; the expansion beam is arranged in the accommodating cavity, and two ends of the expansion beam are respectively connected with the first side wall and the second side wall; at least one of the first side wall and the second side wall is provided with a mounting groove towards the side face of the accommodating cavity, the notch of the mounting groove faces the accommodating cavity, the groove side wall of the mounting groove is provided with an assembly opening, the assembly opening penetrates through one end of the groove side wall towards the notch, the end part of the expansion beam is arranged in the mounting groove at the corresponding end, and the end part can be inserted into or removed from the corresponding mounting groove through the assembly opening.

The notch of mounting groove orientation holds the chamber for the expansion beam can peg graft in the mounting groove after the equipment is accomplished. The assembly opening is arranged on the side wall of the groove of the mounting groove, and the assembly opening penetrates through one end of the side wall of the groove towards the notch, so that when one side wall of the expansion Liang Xiangdi and the second side wall are assembled, the end part of at least one end of the expansion beam can be laterally inserted into the mounting groove along the assembly opening, the assembly opening forms an avoidance space for the expansion beam to be inserted into the mounting groove, the problem that the assembly difficulty is high due to the fact that the expansion beam is limited by the distance between the first side wall and the second side wall is solved, the expansion beam can be assembled on the body after being assembled into a closed frame on the side wall of the body, the shape of the closed frame of the body is corrected through the expansion beam, and the possibility of deformation of the body is reduced; and the assembly opening can play a guiding role in the assembly of the expansion beam, so that the convenience in the assembly of the expansion beam is improved, and the convenience in the assembly of the battery box body is improved.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. A power supply system having the battery-composition power utilization device disclosed in the present application may be used.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application, where a vehicle 1000 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle or an extended range vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments 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.

Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the application, the battery 100 includes a battery case 110 and a battery cell 120, and the battery cell 120 is accommodated in the battery case 110. The battery case 110 is used to provide an accommodating space for the battery cell 120, and the battery case 110 may have various structures. In some embodiments, the battery case 110 may include a first portion 111 and a second portion 112, the first portion 111 and the second portion 112 being overlapped with each other, the first portion 111 and the second portion 112 together defining an accommodating space for accommodating the battery cell 120. The second portion 112 may be a hollow structure with one end opened, the first portion 111 may be a plate-shaped structure, and the first portion 111 covers the opening side of the second portion 112, so that the first portion 111 and the second portion 112 together define an accommodating space; the first portion 111 and the second portion 112 may also be hollow structures with one side open, and the open side of the first portion 111 is covered with the open side of the second portion 112. Of course, the battery case 110 formed by the first portion 111 and the second portion 112 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 100, the battery cells 120 may be one or more, where in the case of having a plurality of battery cells, the plurality of battery cells 120 may be connected in series or in parallel or in series-parallel, and the series-parallel refers to that the plurality of battery cells 120 are connected in both series and in parallel. The plurality of battery cells 120 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 120 is accommodated in the battery box 110; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 120 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole and be accommodated in the battery case 110. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 120.

Wherein, each battery cell 120 may be a secondary battery 100 or a primary battery 100; but not limited to, lithium sulfur battery 100, sodium ion battery 100, or magnesium ion battery 100. The battery cell 120 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell according to some embodiments of the present application, and the battery cell 120 includes an end cap 121, a housing 124, a battery cell assembly 125, and other functional components. The battery cell 120 refers to the smallest unit constituting the battery 100,

The end cap 121 refers to a member that is covered at the opening of the case 124 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 121 may be adapted to the shape of the housing 124 to fit the housing 124. Alternatively, the end cap 121 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cap 121 is not easily deformed when being extruded and collided, so that the battery cell 120 can have a higher structural strength, and the safety performance can be improved. The end cap 121 may be provided with functional parts such as electrode terminals 122. The electrode terminals 122 may be used to electrically connect with the cell assemblies 125 for outputting or inputting electric power of the battery cells 120. In some embodiments, the end cap 121 may further be provided with a pressure relief assembly 123 for relieving the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value, and the pressure relief assembly 123 may particularly take the form of an explosion-proof valve, a gas valve, a pressure relief valve, a safety valve, or the like, and may particularly take the form of a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery 100 reaches a predetermined threshold value, the pressure relief assembly 123 performs an action or a weak structure provided in the pressure relief assembly 123 is broken, thereby forming an opening or passage through which the internal pressure of the battery 100 can be relieved. The material of the end cap 121 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 121, which may be used to isolate electrical connection components within the housing 124 from the end cap 121 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The housing 124 is an assembly for mating with the end cap 121 to form the internal environment of the battery cell 120, where the formed internal environment may be used to house the cell assembly 125, electrolyte, and other components. The case 124 and the end cap 121 may be separate components, and an opening may be provided in the case 124, and the interior of the battery cell 120 may be formed by covering the opening with the end cap 121 at the opening. It is also possible to integrate the end cap 121 and the housing 124, but specifically, the end cap 121 and the housing 124 may form a common connection surface before other components are put into the housing, and when the interior of the housing 124 needs to be sealed, the end cap 121 is then covered with the housing 124. The housing 124 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 124 may be determined according to the specific shape and size of the cell assembly 125. The material of the housing 124 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The cell assembly 125 is a component of the battery cell 120 where an electrochemical reaction occurs. One or more battery cell assemblies 125 may be contained within the housing 124. The cell assembly 125 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body of the cell assembly 125, and the portions of the positive and negative electrode sheets having no active material constitute the tabs 126, respectively. The positive electrode tab 126 and the negative electrode tab 126 may be located at one end of the main body or may be located at two ends of the main body. During charge and discharge of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the tab 126 is connected to the electrode terminal 122 to form a current loop.

Referring to fig. 4 to 7, fig. 4 is a partial structure diagram of a battery case according to some embodiments of the present application; fig. 5 is an enlarged view of a portion a of fig. 4, fig. 6 is an exploded view of a battery case according to some embodiments of the present application, and fig. 7 is an enlarged view of a portion B of fig. 6, where the battery case 110 includes a body 114 and an expansion beam 113, a receiving cavity 115 is formed in the body 114, and the body 114 has a first side wall 1141 and a second side wall 1142 opposite to each other and spaced apart from each other; the expansion beam 113 is disposed in the accommodating cavity 115, and two ends of the expansion beam 113 are respectively connected with the first side wall 1141 and the second side wall 1142; at least one of the first and second side walls 1141 and 1142 is provided with a mounting groove 116 toward a side of the receiving chamber 115. The notch 1161 of the mounting groove 116 faces the accommodating cavity 115, the groove side wall 1163 of the mounting groove 116 is provided with an assembling port 1162, the assembling port 1162 penetrates through one end of the groove side wall 1163 facing the notch 1161, the end 1131 of the expansion beam 113 is arranged in the mounting groove 116 at the corresponding end, and the end 1131 can be inserted into or removed from the corresponding mounting groove 116 through the assembling port 1162.

The body 114, i.e., a main portion of the battery case 110, forms a receiving chamber 115, and the receiving chamber 115 is used to receive the battery cell 120. The body 114 may include a rim that encloses a receiving cavity 115. The body 114 may further include a bottom plate disposed at the bottom end of the frame to serve as a bottom wall 1145 of the body 114 to seal the bottom end of the accommodating cavity 115. A top plate assembly may also be provided in the battery case 110 at an end of the rim facing away from the bottom plate to seal the receiving cavity 115. Wherein, referring to fig. 2, the bottom plate and the frame may form the second portion 112, and the top plate assembly may be the first portion 111.

The first side wall 1141 and the second side wall 1142 may be understood as two side walls disposed opposite to each other in the frame. The frame may be a substantially rectangular frame, and the first side wall 1141 and the second side wall 1142 may be opposite and parallel to each other. The frame may further include a third side wall 1143 and a fourth side wall 1144 disposed opposite to and at an interval apart from the first side wall 1141 and the second side wall 1142, wherein the third side wall 1143 is connected between one end of the first side wall 1141 and one end of the second side wall 1142, and the fourth side wall 1144 is connected between the other end of the first side wall 1141 and the other end of the second side wall 1142, that is, the first side wall 1141, the third side wall 1143, the second side wall 1142 and the fourth side wall 1144 are sequentially connected end to form the frame.

The expansion beam 113 is provided in the receiving chamber 115, which may be a bar-shaped block or plate-shaped structure. The structural design and the installation of the expansion beam 113 complement each other, and the expansion beam 113 can be processed by various processes, and specifically can be an expansion beam 113 of a section bar, a rolled expansion beam 113, a sheet metal expansion beam 113, a die-cast expansion beam 113 and the like.

The two ends of the expansion beam 113 may be opposite ends of the expansion beam 113 along the length direction thereof, and for convenience of description, the end of the expansion beam 113 connected to the first side wall 1141 is defined as a first end 1133, and the end of the expansion beam 113 connected to the second side wall 1142 is defined as a second end 1134. In the present embodiment, the length direction of the expansion beam 113 can be understood with reference to the width direction Y1 of the battery case 110.

After the battery cell 120 is assembled in the battery case 110 to form the battery 100, the expansion beam 113 is disposed at one side of the battery cell 120 and abuts against the battery cell 120. The inside of the expansion beam 113 can be provided with a hollow cavity, when the battery cell 120 has an expansion trend, the expansion beam 113 abuts against the battery cell 120, and the expansion force is absorbed and transmitted by utilizing the deformation of the accommodating cavity 115, so that the probability of the deformation of the battery box 110 due to the expansion force is reduced.

The side of the first side wall 1141 facing the receiving chamber 115 may be provided with a mounting groove 116, and an end 1131 of the first end 1133 of the expansion beam 113 is disposed in the mounting groove 116 of the first side wall 1141 to be connected with the first side wall 1141. The side of the second side wall 1142 facing the receiving chamber 115 may be provided with a mounting groove 116, and an end 1131 of the second end 1134 of the expansion beam 113 is disposed in the mounting groove 116 of the second side wall 1142 to be connected with the second side wall 1142. One of the first side wall 1141 and the second side wall 1142 may be provided with the mounting groove 116 of the present embodiment, and the other is not provided with the mounting groove 116 of the present embodiment, that is, the expansion beam 113 may be fixed at one end to the corresponding side wall by the mounting groove 116 with the assembly opening 1162, and connected at the other end to the corresponding side wall by other means. For example, in some possible implementations, the side of the first side wall 1141 facing the receiving cavity 115 is provided with a mounting groove 116 with an assembly opening 1162, the first end 1133 of the expansion beam 113 is inserted into the mounting groove 116 through the assembly opening 1162 and is disposed in the mounting groove 116 of the first side wall 1141 to be connected with the first side wall 1141, and the other end of the expansion beam 113 is directly welded with the second side wall 1142; for another example, a side of the first side wall 1141 facing the receiving chamber 115 is provided with a mounting groove 116 having an assembling opening 1162, a side of the second side wall 1142 facing the receiving chamber 115 is provided with an assembling groove without the assembling opening 1162, a first end 1133 of the expansion beam 113 is inserted into the mounting groove 116 corresponding to the end through the assembling opening 1162 and is disposed in the mounting groove 116, and a second end 1134 of the expansion beam 113 is inserted into the assembling groove corresponding to the end through a notch 1161 of the assembling groove to be connected with the second side wall 1142.

The side of the first side wall 1141 facing the receiving chamber 115, i.e., the inner side of the first side wall 1141, and the side of the second side wall 1142 facing the receiving chamber 115, i.e., the inner side of the second side wall 1142. The mounting groove 116 may be partially formed by recessing the inner side surface of the first side wall 1141 or the inner side surface of the second side wall 1142, or the mounting member 130 may be disposed on the inner side surface of the first side wall 1141 or the inner side surface of the second side wall 1142, the mounting groove 116 may be disposed on the mounting member 130, or the mounting member 130 may be matched with the corresponding inner side surface to form the mounting groove 116. Wherein the mounting member 130 may protrude with respect to an inner side surface thereof.

The mounting groove 116 has a notch 1161 facing the receiving chamber 115 so that the end 1131 thereof may be inserted into the mounting groove 116 when the expansion beam 113 is assembled to the battery case 110. Wherein, the notch 1161 of the mounting groove 116 disposed on the first side wall 1141 may be disposed toward the second side wall 1142, the notch 1161 of the mounting groove 116 disposed on the second side wall 1142 may be disposed toward the first side wall 1141, the groove side wall 1163 of the mounting groove 116 is a groove wall connected between the notch 1161 and the groove bottom wall 1167, and the groove bottom wall 1167 is a groove wall opposite to the notch 1161, that is, the groove side wall 1163 extends substantially along the depth direction of the mounting groove 116. The assembly port 1162 is arranged on the groove side wall 1163 of the mounting groove 116, the assembly port 1162 penetrates through one end, facing the groove 1161, of the groove side wall 1163, so that the assembly port 1162 is communicated with the groove 1161, and in the process of inserting the end 1131 of the expansion beam 113 into the mounting groove 116 from the assembly port 1162, the expansion beam 113 cannot interfere with the mounting groove 116, and can be smoothly inserted into the mounting groove 116.

In order to mate the mounting groove 116 with the expansion beam 113, the mounting groove 116 may be designed to resemble the structure of the end 1131 of the expansion beam 113.

The ends 1131 can be inserted into or removed from the corresponding mounting slots 116 via the assembly ports 1162, that is, the assembly ports 1162 are sized larger than or adapted to the corresponding dimensions of the expansion beams 113 to allow the expansion beams 113 to pass through the assembly ports 1162.

In the battery box 110 of the embodiment of the application, when the expansion beam 113 is assembled to the first side wall 1141 and the second side wall 1142, the end 1131 of at least one end of the expansion beam 113 can be laterally inserted into the mounting groove 116 along the assembling opening 1162, the assembling opening 1162 forms a avoiding space for inserting the expansion beam 113 into the mounting groove 116, the problem that the expansion beam 113 is difficult to assemble due to the limitation of the distance between the first side wall 1141 and the second side wall 1142 is relieved, and the expansion beam 113 can be assembled to the body 114 after the body 114 is assembled to form a closed frame, so that the shape of the closed frame of the body 114 is corrected by the expansion beam 113, and the possibility of deformation of the body 114 is reduced; in addition, the assembly opening 1162 can guide the assembly of the expansion beam 113, thereby improving the convenience of the assembly of the expansion beam 113 and the battery case 110. Meanwhile, the end 1131 of the expansion beam 113 is arranged in the mounting groove 116, so that compared with the mode that the expansion beam 113 is directly welded on the surface of the body 114, the spray coating treatment of corners is facilitated, and the treatment effect of the surface of the battery box 110 is improved.

It should be noted that, in the present embodiment, the expansion beam 113 is assembled by inserting the body 114 into the mounting groove 116, and the expansion beam 113 may be disassembled conveniently, and only the expansion beam 113 needs to be moved out along the assembling opening 1162 during the disassembling process.

According to some embodiments of the present application, optionally, a side of the first side wall 1141 facing the accommodating chamber 115 and a side of the second side wall 1142 facing the accommodating chamber 115 are each provided with a mounting groove 116, and an orientation Z2 of the assembly opening 1162 of the mounting groove 116 of the first side wall 1141 is the same as an orientation Z2 of the assembly opening 1162 of the mounting groove 116 of the second side wall 1142.

It is understood that the mounting groove 116 on the first side wall 1141 and the mounting groove 116 on the second side wall 1142 have assembly openings 1162, and two end portions 1131 of the expansion beam 113 are respectively disposed in the mounting grooves 116 at corresponding ends.

The mounting grooves 116 are formed in the first side wall 1141 and the second side wall 1142, and the directions Z2 of the assembly openings 1162 of the mounting grooves 116 at the two ends are consistent, so that the expansion beam 113 can be assembled into the mounting grooves 116 through the assembly openings 1162 at the two ends at the same time, the operation is convenient and quick, and the avoidance space can be formed in the same direction, so that the assembly convenience of the expansion beam 113 is further improved.

According to some embodiments of the present application, optionally, as shown in fig. 4 to 7, and in conjunction with fig. 8 and 9, fig. 8 is a schematic structural view of a mounting member according to some embodiments of the present application, and fig. 9 is a schematic structural view of a mounting member according to some embodiments of the present application, the battery case 110 further includes a mounting member 130, at least one of the first side wall 1141 and the second side wall 1142 is connected to the mounting member 130 toward the side of the receiving cavity 115, and the mounting member 130 is provided with a mounting groove 116, or the side of the first side wall 1141 or the second side wall 1142 toward the receiving cavity 115 cooperates with the corresponding mounting member 130 to form the mounting groove 116.

As shown in fig. 7 and 8, the mounting member 130 may independently form the mounting groove 116, with both the groove bottom wall 1167 and the groove side wall 1163 of the mounting groove 116 being formed by the mounting member 130. The mounting member 130 may be a block-shaped or plate-shaped member, and the mounting member 130 may be a structure formed by integrally casting, machining, or the like, or may be a structure formed by combining several parts.

As shown in fig. 9, and further referring to fig. 10 and 11, fig. 10 is an enlarged view of a portion C of fig. 4, and fig. 11 is an enlarged view of a portion D of fig. 6, the mounting member 130 cooperates with a wall surface of the first side wall 1141 or the second side wall 1142 where the mounting member is located to form the mounting groove 116. The position of the side of the first side wall 1141 or the second side wall 1142 facing the receiving cavity 115 corresponding to the mounting groove 116 may be the groove bottom wall 1167 of the mounting groove 116, and the mounting member 130 may be used to enclose the groove side wall 1163 forming the mounting groove 116.

The mounting member 130 may be welded to the first side wall 1141, the mounting member 130 may be welded to the second side wall 1142, and the mounting member 130 may be assembled on the body 114 in advance during the assembly of the battery case 110. Specifically, the body 114 may be integrally connected to the mounting member 130, and may be integrally welded.

In this embodiment, the mounting member 130 is disposed on the first side wall 1141 and/or the second side wall 1142, and the mounting slot 116 is formed by the mounting member 130 in a matching or separate manner, so that the strength of the body 114 is not affected, and the processing and the assembly are convenient.

According to some embodiments of the present application, alternatively, as shown in fig. 4 to 7 and in conjunction with fig. 8 and 9, the mounting member 130 includes a fixing plate portion 131 and a groove wall portion 132, a side surface of the first side wall 1141 facing the accommodating chamber 115 or a side surface of the second side wall 1142 facing the accommodating chamber 115 is connected to the fixing plate portion 131, the groove wall portion 132 is connected to a side of the fixing plate portion 131 facing the accommodating chamber 115, and the groove wall portion 132 at least encloses a portion of the mounting groove 116.

The fixing plate 131 is used for connecting with the main body 114, and the groove wall 132 is fixed at one side of the fixing plate 131. The groove wall plate 132 encloses at least a part of the mounting groove 116, which means that at least the groove wall plate 132 of the fixing plate 131 and the groove wall plate 132 participates in enclosing the mounting groove 116, specifically, the groove wall plate 132 can be independently enclosed to form the mounting groove 116; as shown in fig. 8, the mounting groove 116 may be formed on the side of the fixed plate 131 facing the accommodation chamber, or as shown in fig. 9, the mounting groove 116 may penetrate the fixed plate 131 and the fixed plate 132, that is, the mounting groove 116 may be formed by the fixed plate 131 and the fixed plate 132.

It will be appreciated that the slot wall 132 may be disposed substantially parallel to the inner surface of the first side wall 1141 or the second side wall 1142, so as to enhance the convenience of assembly, and the plate surface of the slot wall 132 may be substantially perpendicular to the fixing plate 131 so as to increase the extension length of the slot side wall 1163, i.e. increase the slot depth of the mounting slot 116.

In this embodiment, the fixing plate 131 can improve the assembling convenience of the mounting member 130, and the mounting member 130 has a simple structure and can save material.

According to some embodiments of the present application, as shown in fig. 9 to 11, optionally, a notch 133 is provided on the fixing plate portion 131, the groove wall plate portion 132 encloses the notch 133 along a circumference of the notch 133, and the groove wall plate portion 132 and the fixing plate portion 131 together enclose the notch 133 to form the mounting groove 116.

Wherein the notch 133 penetrates opposite sides of the fixing plate portion 131. In this embodiment, the fixing plate portion 131 is provided with the notch 133 and forms the mounting groove 116 in cooperation with the groove wall portion 132, so that the mounting groove 116 penetrates through opposite sides of the fixing plate portion 131, and the assembly opening 1162 is formed corresponding to the position of the notch 133 of the fixing plate portion 131, so that the assembly opening 1162 may penetrate through the fixing plate portion 131 and the groove wall portion 132, and the assembly opening 1162 may extend from the inner side surface of the first side wall 1141 or the inner side surface of the second side wall 1142 as a starting point into the accommodating cavity 115, which is favorable for the expansion beam 113 to attach to the inner wall of the first side wall 1141 or the second side wall 1142 to face the mounting groove 116 for sliding, thereby improving the assembly convenience of the expansion beam 113.

According to some embodiments of the present application, alternatively, as shown in fig. 4 to 7, a side surface of the first side wall 1141 facing the accommodating cavity 115 or a side surface of the second side wall 1142 facing the accommodating cavity 115 is in abutting connection with a plate surface of the corresponding fixing plate portion 131.

That is, the mounting member 130 connected to the first side wall 1141 has the fixing plate portion 131 attached to the inner wall surface of the first side wall 1141; the fixing plate portion 131 of the mounting member 130 connected to the second side wall 1142 is bonded to the inner wall surface of the second side wall 1142.

The plate surface of the fixing plate 131 is disposed substantially parallel to the inner wall surface thereof, so that the fixing plate 131 can be more bonded to the corresponding inner wall surface.

It can be appreciated that the fixing plate 131 is attached to the inner side surface of the corresponding side wall, specifically, the fixing plate 131 and the inner side surface can be bonded or welded by glue, and the attachment area between the fixing plate 131 and the inner side surface can be increased by attaching, so that the connection stability of the mounting member 130 on the body 114 is improved.

According to some embodiments of the application, the fixed plate portion 131 is optionally of unitary construction with the channel wall portion 132.

Wherein the fixing plate portion 131 and the groove wall plate portion 132 may be an integrally formed structure, for example, a stamped integrally formed structure; the structure may be integrally connected, and specifically, may be welded connection or the like.

It can be appreciated that the fixing plate portion 131 and the groove wall plate portion 132 are integrally formed, so that the connection stability of the fixing plate portion 131 and the groove wall plate portion 132 can be improved, and the connection stability of the expansion beam 113 and the body 114 can be further improved.

Optionally, as shown in fig. 4 to 7, the body 114 further includes a bottom wall 1145, the bottom wall 1145 is connected to the same end of the first side wall 1141 and the second side wall 1142, and the assembly opening 1162 is disposed towards a side of the bottom wall 1145, or the assembly opening 1162 is disposed towards a side of the bottom wall 1145.

Wherein, the bottom wall 1145 may be connected to the end surface of the bottom end of the first side wall 1141 and the end surface of the bottom end of the second side wall 1142.

In some implementations, the assembly port 1162 is disposed toward the side of the bottom wall 1145, i.e., the assembly port 1162 is downward, and the expansion beam 113 may be inserted into the mounting groove 116 from the bottom opening of the bezel in a bottom-up direction through the assembly port 1162 when the expansion beam 113 is assembled. Wherein, the assembling opening 1162 of the mounting groove 116 on the first side wall 1141 may be flush with the top end of the first side wall 1141, and the assembling opening 1162 of the mounting groove 116 on the second side wall 1142 may be flush with the top end of the second side wall 1142, so that the expansion beam 113 is inserted into the mounting groove 116 from the top end of the first side wall 1141 or the second side wall 1142 along the height direction Z1 of the body 114. The height direction Z1 of the body 114 is the height direction Z1 of the battery box 110, and the height direction Z1 is a direction perpendicular to the bottom wall 1145.

In other implementations, the assembly port 1162 is disposed toward a side of the frame away from the bottom wall 1145, i.e., the assembly port 1162 is facing upward, and the expansion beam 113 may be inserted into the mounting groove 116 from the top opening of the frame in a top-down direction through the assembly port 1162 when the expansion beam 113 is assembled. The assembly opening 1162 of the mounting groove 116 on the first side wall 1141 may be flush with the bottom end of the first side wall 1141, and the assembly opening 1162 of the mounting groove 116 on the second side wall 1142 may be flush with the bottom wall 1145 of the second side wall 1142, so that the expansion beam 113 is inserted into the mounting groove 116 from the bottom end of the first side wall 1141 or the second side wall 1142 in the height direction Z1 of the battery case 110.

In the solution where the assembly opening 1162 is disposed towards the side of the bottom wall 1145, when the battery box 110 is assembled, the frame may be assembled, then the expansion beam 113 is assembled to the first side wall 1141 and the second side wall 1142 of the frame, and finally the bottom wall 1145 is assembled. Therefore, when the expansion beam 113 is assembled, one end of the frame facing the bottom wall 1145 is opened, and the expansion beam 113 can slide into the assembly opening 1162 smoothly without interfering with each side wall of other frames, so that the operation is convenient.

Optionally, as shown in fig. 4 to 7 and in conjunction with fig. 10 and 11, the mounting groove 116 is disposed at an end of the first side wall 1141 or the second side wall 1142 facing the bottom wall 1145, and the assembly opening 1162 is disposed toward a side of the bottom wall 1145, where the bottom wall 1145 covers the assembly opening 1162.

The assembly opening 1162 of the mounting groove 116 on the first side wall 1141 may be flush with the bottom end of the first side wall 1141, and the assembly opening 1162 of the mounting groove 116 on the second side wall 1142 may be flush with the bottom wall 1145 of the second side wall 1142, so that the bottom wall 1145 may cover the assembly opening 1162 more conveniently.

The bottom wall 1145 may be welded to the first side wall 1141 and the second side wall 1142, and the bottom wall 1145 is further connected to the third side wall 1143 and the fourth side wall 1144 of the body 114 to seal the bottom end of the battery case 110.

It can be appreciated that the mounting groove 116 is close to the bottom wall 1145, and the assembly opening 1162 is disposed towards one side of the bottom wall 1145, and the expansion beam 113 can be directly inserted into the mounting groove 116 along the first side wall 1141 and the second side wall 1142, where the end of the expansion beam 113 close to the bottom wall 1145 is close to the bottom wall 1145, through the assembly opening 1162, so that the assembly efficiency and the assembly convenience of the expansion beam 113 are improved, and meanwhile, the bottom wall 1145 covers the assembly opening 1162, which can have a certain limiting effect on the expansion beam 113 in the mounting groove 116, so that the mounting stability of the expansion beam 113 in the mounting groove 116 is improved.

Optionally, the bottom wall 1145 is provided with a cooling structure, according to some embodiments of the present application.

The cooling structure is a structure for cooling the battery cells 120, and includes, but is not limited to, providing cooling channels in the bottom wall 1145, the cooling channels may be connected to a water cooling device, and cooling water flows through the cooling channels to exchange heat with the bottom wall 1145, thereby cooling the battery cells 120 in the receiving chamber 115 through the bottom wall 1145. In some implementations, the bottom wall 1145 may be a water cooled plate structure.

It can be appreciated that the bottom wall 1145 is provided with a cooling structure, which can cool the battery cell 120, and has a simple structure, and can improve the reliability of the battery case 110.

Optionally, according to some embodiments of the present application, the end 1131 of the expansion beam 113 is snapped into the mounting groove 116; and/or, the end 1131 of the expansion beam 113 is welded to the groove wall of the mounting groove 116; and/or the end 1131 of the expansion beam 113 is connected with the groove wall of the mounting groove 116 by a fastener.

The clamping means that a certain fastening force exists between the end 1131 of the expansion beam 113 and the mounting groove 116, so that the expansion beam 113 can be fixed in the mounting groove 116. The fastening means may be a member such as a bolt or a rivet to connect the expansion beam 113 to the wall of the mounting groove 116.

One of the welding, fastening, and clamping may be selected to secure the expansion beam 113 within the mounting groove 116, or two or three fastening methods may be used simultaneously to secure the expansion beam 113 within the mounting groove 116.

It can be appreciated that, on the basis of guiding and limiting the mounting groove 116, the assembly stability of the expansion beam 113 and the body 114 can be improved by further combining the manners of clamping, welding or fastening.

According to some embodiments of the present application, optionally, referring to fig. 4 and 7, and referring to fig. 12 to 15 in combination, fig. 12 is a schematic view of an expansion beam according to some embodiments of the present application, fig. 13 is a schematic cross-sectional view of an end portion of an expansion beam according to some embodiments of the present application disposed in a mounting groove, fig. 14 is a schematic view of an expansion beam according to some embodiments of the present application, and fig. 15 is a schematic cross-sectional view of an end portion of an expansion beam according to some embodiments of the present application disposed in a mounting groove; the end 1131 of the expansion beam 113 is partially projected to form a projection 1132, and the projection 1132 is disposed in the mounting groove 116.

That is, the end 1131 of the expansion beam 113 may be partially disposed in the mounting groove 116, and the portion disposed in the mounting groove 116 is protruded with respect to the other portion of the end 1131. The protrusion 1132 and the expansion beam 113 may be of a unitary structure.

It can be appreciated that, by partially protruding the end 1131 to form the protruding portion 1132, the size of the mounting groove 116 can be reduced compared to the manner in which the integral end 1131 is disposed in the mounting groove 116, thereby reducing the material consumption for forming the mounting groove 116, and the protruding portion 1132 has smaller sliding resistance in the mounting groove 116 compared to the integral end 1131, thereby facilitating the assembly of the expansion beam 113.

According to some embodiments of the present application, alternatively, referring to fig. 4 to 15, the groove side wall 1163 of the mounting groove 116 includes a first wall 1164 and a second wall 1165, the first wall 1164 and the second wall 1165 are disposed on both sides of the assembly port 1162 along the first direction X2, and the first wall 1164 and the second wall 1165 extend along the direction Z2 of the assembly port 1162, and the first direction X2, the direction Z2 of the assembly port 1162, and the direction Y2 of the notch 1161 intersect two by two.

The first direction X2, the direction Z2 of the assembly opening 1162, and the direction Y2 of the notch 1161 may be disposed substantially perpendicular to each other.

The first wall 1164 and the second wall 1165 extend along the direction Z2 of the assembly opening 1162, when the expansion beam 113 is inserted into the mounting groove 116 through the assembly opening 1162, the expansion beam 113 can slide into the mounting groove 116 along the first wall 1164 and the second wall 1165, the first wall 1164 and the second wall 1165 can play a better guiding role, and the assembly convenience of the expansion beam 113 is improved.

Optionally, according to some embodiments of the application, the first wall 1164 is gradually inclined away from the second wall 1165 along the direction Z2 of the assembly port 1162; and/or, along the direction Z2 of the assembly opening 1162, the second wall 1165 is gradually inclined away from the first wall 1164.

That is, the first side wall 1141 may be disposed obliquely so that the assembly port 1162 forms a flared structure; the second wall 1165 may also be inclined such that the assembly port 1162 forms a flared structure, which may facilitate insertion of the expansion beam 113 into the assembly port 1162 and into the mounting groove 116 along the assembly port 1162.

According to some embodiments of the present application, optionally, the end 1131 of the expansion beam 113 is partially protruded to form a protrusion 1132, the protrusion 1132 is disposed in the mounting groove 116, and the protrusion 1132 is abutted between the first wall 1164 and the second wall 1165 along the first direction X2.

The protruding portion 1132 is abutted between the first wall 1164 and the second wall 1165, and the protruding portion 1132 is abutted with the first wall 1164 and the second wall 1165, so that the movement of the protruding portion 1132 is limited by the first wall 1164 and the second wall 1165 in the first direction X2, the expansion beam 113 is fixed in the first direction X2, and the assembly stability of the expansion beam 113 and the body 114 is improved.

It should be noted that, when the first wall 1164 and the second wall 1165 are obliquely disposed, the protrusion 1132 of the expansion beam 113 may be disposed in an oblique structure matching the first side wall 1141 or the second wall 1165, so that the protrusion 1132 can abut the first wall 1164 and the second wall 1165.

According to some embodiments of the present application, the groove side wall 1163 of the mounting groove 116 optionally further includes a third wall 1166, the third wall 1166 is connected between the first wall 1164 and the second wall 1165, and along the direction Z2 of the assembly port 1162, the third wall 1166 is disposed opposite the assembly port 1162, and the protrusion 1132 abuts against the third wall 1166.

The third wall 1166 can limit the movement of the protrusion 1132 in a direction facing away from the assembly opening 1162, so that not only can the assembly stability of the expansion beam 113 and the body 114 be improved, but also the installation position of the expansion beam 113 in the direction facing the assembly opening 1162 can be positioned.

According to some embodiments of the application, optionally, along the orientation Y2 of the notch 1161, the groove bottom wall 1167 of the mounting groove 116 abuts the protrusion 1132.

The groove bottom wall 1167 can restrict the movement of the expansion beam 113 in the extending direction of the expansion beam 113, improving the assembling stability of the expansion beam 113 and the body 114. Wherein the expansion beam 113 extends in a direction substantially coincident with the direction Y2 of the notch 1161.

Optionally, as shown in fig. 4 and 6, the number of the expansion beams 113 is plural, the expansion beams 113 are spaced apart, and two ends of each expansion beam 113 are respectively connected to the first side wall 1141 and the second side wall 1142. At least one end of each expansion beam 113 is provided with a mounting groove 116, respectively.

The plurality of expansion beams 113 may be disposed at intervals along the length direction X1 of the battery case 110. A battery unit 120 is disposed between adjacent expansion beams 113, so that two sides of the battery unit 120 can abut against the expansion beams 113 to protect the battery box 110. The first side wall 1141 may be provided with a separate mounting groove 116 for each expansion beam 113, and the second side wall 1142 may be provided with a separate mounting groove 116 for each expansion beam 113.

It will be appreciated that each expansion beam 113 is mounted by its corresponding mounting groove 116, which is convenient to operate.

Optionally, as shown in fig. 4 and 6, a side of the body 114 facing away from the receiving cavity 115 is provided with a loading attachment 140, according to some embodiments of the present application.

Wherein, a side of the body 114 facing away from the accommodating cavity 115, that is, an outer side of the body 114, for example, a side of the first side wall 1141 facing away from the accommodating cavity 115 refers to an outer side of the first side wall 1141. The loading connector 140 may be coupled to the body 114 by welding or screwing, etc. The load connector 140 is used to secure the battery 100 to an electrical device, such as the chassis of the vehicle 1000. In some implementations, the loading connector 140 includes a connecting rod with one or more connecting holes provided thereon that cooperate with the bolt assembly to secure the loading connector 140 to secure the battery 100.

Specifically, a side of the first side wall 1141 facing away from the receiving chamber 115 may be provided with a loading connector 140, and a side of the second side wall 1142 facing away from the receiving chamber 115 may be provided with a loading connector 140. The side of the third or fourth side wall 1143, 1144 facing away from the receiving cavity 115 may also be provided with a loading connection 140.

The loading connector 140 is provided in this embodiment, so that the connection convenience between the battery case 110 and the electric device can be improved, and the efficiency of assembling the battery 100 by the electric device can be improved.

Some embodiments of the present application further provide a battery 100, including a battery unit 120 and a battery box 110, where the battery box 110 is the battery box 110 according to the present application or any embodiment of the present application, the battery unit 120 is disposed in the accommodating cavity 115, and the battery unit 120 abuts against the expansion beam 113.

The number of battery cells 120 may be one or more.

The battery 100 of the present embodiment has the same advantageous effects as the battery case 110 provided by the present application.

Some embodiments of the present application also provide an electrical device comprising the battery 100 provided by the present application or any of the embodiments of the present application. Battery 100 may provide electrical power to an electrical device.

The powered device may be any of the devices or systems described above that employ battery 100.

The power utilization device of the present embodiment has the same beneficial effects as the battery case 110 according to the present application or any embodiment of the present application.

As shown in fig. 4 to 15, the present embodiment provides a battery box 110, which includes a body 114 and two expansion beams 113, wherein a receiving cavity 115 is formed in the body 114, the body 114 is generally rectangular, and has a first side wall 1141 and a second side wall 1142 opposite to each other and spaced apart from each other, the body 114 further includes a bottom wall 1145, and the bottom wall 1145 is connected to one ends of the first side wall 1141 and the second side wall 1142. One of the two expansion beams 113 is a first expansion beam 1135, the other one is a first expansion beam 1135, the first expansion beam 1135 and the second expansion beam 1136 are arranged at intervals along the length direction X1 of the battery box 110, the first expansion beam 1135 and the second expansion beam 1136 both extend along the width direction Y1 of the battery box 110, two ends of the first expansion beam 1135 are connected with the inner side surface of the first side wall 1141 and the inner side surface of the second side wall 1142, and two ends of the second expansion beam 1136 are also connected with the inner side surface of the first side wall 1141 and the inner side surface of the second side wall 1142.

Wherein, the first expansion beam 1135 and the second expansion beam 1136 corresponding to the inner side of the first side wall 1141 are respectively connected with the mounting member 130, the two connecting members on the first side wall 1141 are disposed at intervals along the length direction X1 of the battery box 110, the mounting member 130 corresponding to the first expansion beam 1135 and the second expansion beam 1136 corresponding to the inner side of the second side wall 1142 is also respectively connected with the two connecting members on the second side wall 1142 are disposed at intervals along the length direction X1 of the battery box 110. Each mounting member 130 includes a fixing plate portion 131 and a groove wall portion 132, the fixing plate portion 131 is connected to a side surface of the first side wall 1141 facing the accommodating cavity 115 or a side surface of the second side wall 1142 facing the accommodating cavity 115, the groove wall portion 132 is connected to a side of the fixing plate portion 131 facing the accommodating cavity 115, a notch 133 is provided in the fixing plate portion 131, the notch 133 is surrounded by the groove wall portion 132 along a circumferential direction of the notch 133, the groove wall portion 132 and the fixing plate portion 131 together enclose the notch 133 to form a mounting groove 116 having an assembly opening 1162 on one side, a notch 1161 of the mounting groove 116 faces the accommodating cavity 115, a groove bottom wall 1167 of the mounting groove 116 on the first side wall 1141 is an inner wall surface of the first side wall 1141, and a groove bottom wall 1167 of the mounting groove 116 on the second side wall 1142 is an inner wall surface of the second side wall 1142. Both ends of the two expansion beams 113 are disposed in the corresponding mounting grooves 116, and the end 1131 of each expansion beam 113 may be inserted into the mounting groove 116 through the assembly opening 1162 of the corresponding mounting groove 116. The assembly openings 1162 of the four mounting slots 116 are all oriented toward the side of the bottom wall 1145 and are flush with the bottom ends of the first and second side walls 1141, 1142, and the bottom wall 1145 covers all of the assembly openings 1162. The fixing plate portion 131 and the groove wall plate portion 132 of the same mounting member 130 are integrally structured, and each fixing plate portion 131 is bonded and welded to the corresponding inner wall surface. The bottom wall 1145 is provided with a water cooling channel.

The first expansion beam 1135 has a substantially rectangular cross section, and is hollow therein, and the first end 1133 of the first expansion beam 1135 and the end 1131 of the second end 1134 are each partially protruded to form a protrusion 1132, and the protrusions 1132 each extend upward from the top side of the end 1131, and the protrusion 1132 occupies about half the height of the end 1131 along the height direction Z1 of the battery case 110. The second expansion beam 1136 has a generally stepped cross section, and the first end 1133 of the second expansion beam 1136 and the end 1131 of the second end 1134 each partially protrude to form a protrusion 1132, the protrusions 1132 each extend upward from the top side of the end 1131, and the protrusions 1132 extend in the height direction Z1 of the battery case 110 from the bottom step of the end 1131 where they are located to within a step range above the lowermost step. Each of the protruding portions 1132 is disposed flush with the position of the end 1131 where it is located in the longitudinal direction X1 of the battery case 110. Each mounting groove 116 has the same shape as the corresponding protrusion 1132, the protrusion 1132 is disposed in the corresponding mounting groove 116, and the protrusion 1132 can be inserted into the mounting groove 116 through the corresponding assembly opening 1162. The groove side wall 1163 of the mounting groove 116 includes a first wall 1164, a second wall 1165 and a third wall 1166, the first wall 1164 and the second wall 1165 are disposed on both sides of the assembly opening 1162 along the first direction X2, and the first wall 1164 and the second wall 1165 extend along the direction Z2 of the assembly opening 1162, the first direction X2 is understood with reference to the length direction X1 of the battery case 110, the direction Z2 of the assembly opening 1162 is referred to with reference to the height direction Z1 of the battery 100, and the direction Y2 of the notch 1161 is referred to with reference to the width direction Y1 of the battery case 110. The third wall 1166 is connected between the first wall 1164 and the second wall 1165, the third wall 1166 and the assembly port 1162 are opposite to each other along the direction Z2 of the assembly port 1162, and the protrusion 1132 abuts against the third wall 1166 and the bottom wall 1145; along the first direction X2, the protrusion 1132 abuts between the first wall 1164 and the second wall 1165; along the orientation Y2 of the notch 1161, the groove bottom wall 1167 of the mounting groove 116 abuts the projection 1132.

The side of the first side wall 1141 facing away from the receiving cavity 115 may be provided with a loading connector 140 and the side of the second side wall 1142 facing away from the receiving cavity 115 may be provided with a loading connector 140.

In the present embodiment, when the battery box 110 is assembled, the first side wall 1141, the second side wall 1142, the third side wall 1143 and the fourth side wall 1144 may be assembled to form a frame, then each connecting piece is assembled to the inner wall surface of the corresponding side wall, then the first expansion beam 1135 and the second expansion beam 1136 are assembled into the mounting groove 116 from bottom to top, and finally the bottom wall 1145 is connected to the bottom end of the frame. In this embodiment, the battery box 110 and the structures such as the frame with a shape like a Chinese character kou are deformed after being connected (usually by welding), and the structure of the post-mounted expansion beam 113 can have a certain correcting effect on the size indent of the frame.

The battery case 110 of this embodiment is assembled to form a closed structure as shown in fig. 4, 5 and 10. In the height direction Z1 of the battery case 110, each expansion beam 113 is restrained and fixed by the third wall 1166 and the bottom wall 1145 of the corresponding mounting groove 116, in the width direction Y1 of the battery case 110, each expansion beam 113 is restrained by the groove bottom wall 1167 of the first side wall 1141 and the second side wall 1142 at both ends, and in the length direction X1 of the battery case 110, each expansion beam 113 is restrained by the first wall 1164 and the second wall 1165 at both ends, and stable mounting of the expansion beams 113 is achieved. The fixing stability of the expansion beam 113 and the body 114 can be enhanced by welding, riveting, bolting and the like.

The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.

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 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 are intended to be included within the scope of the appended 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

1. A battery box, comprising:

The body is internally provided with a containing cavity, and is provided with a first side wall and a second side wall which are opposite and arranged at intervals;

The expansion beam is arranged in the accommodating cavity, and two ends of the expansion beam are respectively connected with the first side wall and the second side wall;

The side that at least one of first lateral wall with the second lateral wall is towards hold the chamber is provided with the mounting groove, the notch orientation of mounting groove hold the chamber, be provided with the equipment mouth on the groove lateral wall of mounting groove, the equipment mouth link up the groove lateral wall is towards the one end of notch, the tip of expansion beam is located corresponding end in the mounting groove, just the tip can be passed through the equipment mouth inserts or shifts out corresponding the mounting groove.

2. The battery box according to claim 1, wherein the side face of the first side wall facing the accommodating chamber and the side face of the second side wall facing the accommodating chamber are each provided with the mounting groove, and the orientation of the assembly opening of the first side wall is the same as the orientation of the assembly opening of the second side wall.

3. The battery box of claim 1, further comprising a mounting member to which the mounting member is connected to a side of at least one of the first and second side walls facing the accommodating chamber, the mounting member being provided with the mounting groove, or the side of the first or second side wall facing the accommodating chamber being formed with the mounting member to cooperate therewith.

4. A battery box according to claim 3, wherein the mounting member comprises a fixing plate portion and a wall plate portion, the first side wall faces the side face of the accommodating chamber or the second side wall faces the side face of the accommodating chamber is connected with the fixing plate portion, the wall plate portion is connected to the side of the fixing plate portion facing the accommodating chamber, and at least a part of the mounting groove is surrounded by the wall plate portion.

5. The battery box according to claim 4, wherein a notch is provided in the fixing plate portion, the notch is provided around the periphery of the notch in the groove wall plate portion, and the notch is provided around the groove wall plate portion and the fixing plate portion together to form the mounting groove.

6. The battery box according to claim 4, wherein the side surface of the first side wall facing the accommodating chamber or the side surface of the second side wall facing the accommodating chamber is bonded to the plate surface of the corresponding fixing plate portion.

7. The battery box of claim 4, wherein the securing plate portion is of unitary construction with the channel wall plate portion.

8. The battery box of any of claims 1-7, wherein the body further comprises a bottom wall connected to the same end of the first and second side walls, the assembly port being disposed toward a side of the bottom wall or the assembly port being disposed toward a side facing away from the bottom wall.

9. The battery box of claim 8, wherein the mounting groove is disposed at an end of the first side wall or the second side wall facing the bottom wall, the assembly opening is disposed toward a side where the bottom wall is located, and the bottom wall covers the assembly opening.

10. The battery box of any one of claims 1-7, wherein the end of the expansion beam is snapped into the mounting groove;

and/or the end part of the expansion beam is welded with the groove wall of the mounting groove;

And/or the end part of the expansion beam is connected with the groove wall of the mounting groove through a fastener.

11. The battery box of any of claims 1-7, wherein the end portion of the expansion beam is partially convex to form a protrusion, the protrusion being disposed within the mounting groove.

12. The battery box of any one of claims 1-7, wherein the slot side walls of the mounting slot comprise a first wall and a second wall, the first wall and the second wall are disposed on opposite sides of the assembly opening in a first direction, and the first wall and the second wall each extend in an orientation of the assembly opening, the first direction, the orientation of the assembly opening, and the orientation of the slot intersecting in pairs.

13. The battery compartment of claim 12, wherein the first wall is disposed progressively obliquely away from the second wall in the orientation of the assembly opening;

and/or, the second wall is gradually inclined away from the first wall along the direction of the assembly opening.

14. The battery box of claim 12, wherein the end portion of the expansion beam partially protrudes to form a protrusion, the protrusion being disposed within the mounting groove and in the first direction, the protrusion abutting between the first wall and the second wall.

15. The battery box of claim 14, wherein the slot side wall of the mounting slot further comprises a third wall connected between the first wall and the second wall and disposed opposite the assembly port in an orientation of the assembly port, the projection abutting the third wall.

16. The battery box of claim 14, wherein a bottom wall of the mounting groove abuts the projection in an orientation of the notch.

17. The battery box according to any one of claims 1 to 7, wherein the number of the expansion beams is plural, the plural expansion beams are arranged at intervals, both ends of each expansion beam are respectively connected to the first side wall and the second side wall, and at least one end of each expansion beam is respectively provided with the mounting groove.

18. The battery compartment as claimed in any one of claims 1 to 7, wherein a loading connection is provided on a side of the body facing away from the receiving chamber.

19. A battery, comprising:

The battery case of any one of claims 1-18;

and the battery monomer is arranged in the accommodating cavity and is abutted with the expansion beam.

20. An electrical device comprising the battery of claim 19.