CN115832562A

CN115832562A - Battery box and have its battery

Info

Publication number: CN115832562A
Application number: CN202210468309.8A
Authority: CN
Inventors: 李志强; 曾超; 包聪; 王升威; 汪宇超
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-03-21

Abstract

The application provides a battery box and have its battery. The first aspect of this application provides a battery box, and the inside of battery box is formed with the accommodation space who is enclosed by the lateral wall, and the first lateral wall of at least one side of battery box is provided with the support piece that sets up along the extending direction of first lateral wall, and support piece and the adjacent second lateral wall butt of first lateral wall are in order to support the first lateral wall of battery box. The battery box that this application first aspect provided improves the structural strength of the lateral wall of battery box through set up support piece at the lateral wall to this bearing capacity who improves the lateral wall of battery box reduces the lateral wall of battery box and takes place to warp the risk of extrusion battery module when bearing pressure, takes place to warp and promotes two adjacent battery modules and takes place the phenomenon of shifting in opposite directions in this lateral wall that reduces the battery box after bearing outside extrusion force.

Description

Battery box and have its battery

Technical Field

The embodiment of the application relates to the technical field of energy storage, in particular to a battery box body and a battery with the same.

Background

Among the prior art, the installation space of battery is comparatively narrow and small, and the battery box can appear being extruded with the contact of other parts of outside, especially to the battery that is used for the vehicle, at the in-process of jolting that traveles of vehicle, the phenomenon of collision and extrusion battery box can appear in the part that is close to the battery box in the vehicle, lead to the battery box to take place to warp and extrude the phenomenon of battery module in the battery box, what is more, the battery box can transmit outside extrusion force to battery module and promote battery module to take place to shift, lead to two adjacent battery modules to appear colliding the short circuit phenomenon.

Disclosure of Invention

In view of the above problem, the embodiment of the application provides a battery box and a battery with the same, which can improve the structural strength of the battery box and reduce the risk that the battery box deforms and presses an internal battery module.

The first aspect of this application provides a battery box, and the inside of battery box is formed with the accommodation space who is enclosed by the lateral wall, and the first lateral wall of at least one side of battery box is provided with the support piece that sets up along the extending direction of first lateral wall, and support piece and the adjacent second lateral wall butt of first lateral wall are in order to support the first lateral wall of battery box.

The battery box that this embodiment provided improves the structural strength of the lateral wall of battery box through set up support piece at the lateral wall to this improves the bearing capacity of the lateral wall of battery box, reduces the lateral wall of battery box and takes place to warp and the risk of extrudeing inside battery module when bearing pressure. Moreover, the support member is arranged on the side wall of the battery box body, because the external extrusion force borne by the battery box body is generally distributed on the side wall of the battery box body, and the side wall of the battery box body can deform after bearing the external extrusion force and push two adjacent battery modules to displace in opposite directions, the support member is arranged on the side wall of the battery box body.

Alternatively, the battery case is provided in a rectangular structure, and the first side wall is provided as a long side wall corresponding to a length direction of the battery case or a wide side wall corresponding to a width direction of the battery case. The first sidewall provided with the supporting member according to the present embodiment is determined according to the distribution of the external force received by the battery box, when the direction of the external force received by the battery box is consistent with the distribution direction of the long sidewall, the long sidewall is used as the first sidewall to provide the supporting member, when the direction of the external force received by the battery box is consistent with the distribution direction of the wide sidewall, the wide sidewall is used as the first sidewall to provide the supporting member, and when the external force received by the battery box comes from the peripheral sidewalls of the battery box, the supporting member is provided on both the long sidewall and the wide sidewall of the battery box.

Optionally, the battery box is provided with a rectangular structure, and two first side walls of the battery box, which are oppositely arranged, are provided with two supporting pieces. This embodiment can improve the atress equilibrium of battery box through two support piece of relative setting, reduces the battery box and appears one side after bearing external force and take place deformation or the phenomenon that stress concentration appears in the opposite side.

Optionally, the first side wall of the battery box is provided with accommodating grooves distributed along the extending direction of the first side wall, and the supporting piece is detachably placed in the accommodating grooves. This embodiment can conveniently change and maintain support piece through placing support piece detachably in the holding tank of first lateral wall to this suitability and the operational reliability who improves support piece.

Optionally, the battery box body includes a bottom case having a top opening, an accommodating space is formed inside the bottom case, and the first side wall is disposed on the bottom case. The present embodiment proposes that the first sidewall is disposed on the bottom case, and since the bottom case is a main supporting component of the battery case, the risk that the bottom case deforms and extrudes the internal battery module can be minimized.

Optionally, the first side wall of the bottom shell is provided with a mounting table or an interlayer, and the accommodating groove and the supporting piece are both arranged on the mounting table or the interlayer. The mount table or the intermediate layer that this embodiment provided provide comparatively sufficient space that sets up for holding tank and support piece, have improved holding tank and support piece's the convenience of setting and structural stability.

Optionally, the battery box further includes a box cover covering the top opening of the bottom case, and the box cover contacts with the support member, and the support member supports the bottom case and the box cover. The supporting member of the present embodiment also has the technical effect of supporting the bottom case and the case cover, and can bear external force along the height direction of the battery case body to a certain extent.

Optionally, the support member includes a strip-shaped plate matched with the length of the accommodating tank and two positioning rib plates arranged at two ends of the strip-shaped plate, the strip-shaped plate is in clearance fit with the accommodating tank, and the positioning rib plates are tightly attached to the accommodating tank.

The integrated configuration of bar shaped plate and location gusset that this embodiment provided plays supporting role and reduces under the prerequisite of the whole weight of support piece through the bar shaped plate, and location gusset can play the positioning role to support piece, reduces support piece and takes place to rock the phenomenon at the holding tank.

Optionally, support piece includes with the length complex bar shaped plate of holding tank and sets up in a plurality of pterygoid laminas of the both ends of bar shaped plate and lateral wall, bar shaped plate and holding tank clearance fit, the pterygoid lamina pastes tight holding tank setting.

The integrated configuration of strip shaped plate and a plurality of pterygoid lamina that this embodiment provided, a plurality of pterygoid laminas can play the effect of dispersed stress, reduce support piece and take place stress concentration phenomenon after bearing external force.

Optionally, support piece includes with the length complex bar shaped plate of holding tank and set up in a plurality of sawtooth structures of the lateral wall of bar shaped plate, bar shaped plate and holding tank clearance fit, the sawtooth structure pastes tight holding tank setting.

The integrated configuration of strip shaped plate and a plurality of sawtooth structure that this embodiment provided, a plurality of sawtooth structures can play the effect of dispersed stress, reduce support piece and take place stress concentration phenomenon after bearing external force.

Optionally, the support member includes a hollow plate disposed to be closely attached to the receiving groove, and a plurality of support ribs are disposed inside the hollow plate and spaced apart from each other. The integrated configuration of well hollow plate and a plurality of brace rods of inside that this embodiment provided, the outer wall of well hollow plate is smooth relatively, easy to assemble, and a plurality of brace rods can play the effect of dispersion stress, reduce support piece and take place stress concentration phenomenon after bearing external force.

Optionally, the yield strength of the support member is greater than the yield strength of the first side wall of the battery case. The support piece that this embodiment provided can reduce the risk that the battery box takes place deformation, bears under the condition that external force has the deformation trend at the battery box, thereby support piece does not have the deformation trend and can play the effect that blocks the battery box and take place deformation to this reduces the battery box and takes place the phenomenon that the extrusion battery module appears after warping.

The second aspect of the present application provides a battery, which comprises at least one battery module and a battery box body according to the first aspect of the present application, wherein the at least one battery module is arranged in the accommodating space of the battery box body.

Optionally, the first side wall of the battery box and the support correspond to a distribution direction of the plurality of battery modules, and are used for limiting the opposite movement between two adjacent battery modules. This embodiment corresponds through the distribution direction with the first lateral wall of battery box and support piece and a plurality of battery module, and when the battery box bore the external force along a plurality of battery module's distribution direction, support piece can reduce the battery box and take place the deformation along a plurality of battery module's distribution direction to this reduces two adjacent battery module and the short circuit phenomenon of colliding appears.

Optionally, the support member has an elastic deformation amount and/or a plastic deformation amount smaller than a distance between two adjacent battery modules. The support piece that this embodiment provided can enough play the effect that supports battery box and reduce deformation, simultaneously, because support piece possesses certain elastic deformation ability and/or plastic deformation ability, support piece can also reduce support piece because rigidity is too big appear the rupture phenomenon after bearing external force through elastic deformation and/or plastic deformation.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional 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. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

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

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

fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application;

fig. 4 is an exploded view of a battery cell according to some embodiments of the present disclosure;

fig. 5 is a schematic structural view of a battery case according to a first embodiment of the present application;

FIG. 6 is a schematic structural diagram of a battery case according to a second embodiment of the present application;

fig. 7 is a schematic structural view of a battery case according to a third embodiment of the present application;

fig. 8 is a schematic structural view of a battery case according to a fourth embodiment of the present application.

Some of the figures in the detailed description are numbered as follows:

1000 vehicles;

100 batteries, 200 frames;

10 battery case, 11 first part, 12 second part, 13 flange;

20 cell module, 21 cell, 211 end cap, 211a electrode terminal, 212 case, 213 electrode assembly;

110 bottom shell, 111 first side wall, 112 mounting table, 113 accommodating groove, 114 second side wall;

120 case covers;

30 supporting parts, 31 strip-shaped plates, 32 positioning rib plates, 33 wing plates, 34 sawtooth structures, 35 supporting ribs and 36 hollow plates.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art 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 only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

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

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "parallel", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the indicated orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the current vehicle, the lateral wall of battery box bears external force often, and the lateral wall of battery box can take place deformation and extrude inside battery module and take place the aversion phenomenon after bearing external force, though the material strength through the lateral wall that improves the battery box can alleviate the lateral wall of battery box to a certain extent and take place extrusion deformation's problem, however, because the lateral wall and the battery box integrated into one piece of battery box, if need improve the material strength of lateral wall, then need improve the whole material strength of battery box, lead to the phenomenon that the material waste or whole bearing capacity is not enough can appear in the battery box in the in-service use process.

In order to solve the technical problem that the structural strength of the side wall of the battery box body in the market is not enough, the structural strength of the side wall of the battery box body is improved by arranging the supporting piece on the side wall of the battery box body, so that the bearing capacity of the side wall of the battery box body is improved, and the risk that the battery box body is damaged when bearing pressure is reduced.

The battery box disclosed in the embodiment of the application can be used for a battery. The battery case is used to accommodate a battery module, and a battery is required for devices such as a vehicle that requires electric power. The battery includes a battery case and a battery module.

For convenience of explanation, the following examples will be described with reference to a battery according to an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present disclosure. The vehicle 1000 is provided with a battery 100 and a vehicle frame 200 inside, and the battery 100 may be provided on the vehicle frame 200. The plurality of batteries 100 may be stacked on the frame 200 from top to bottom, or may be laid flat on the frame 200.

Referring to fig. 2 and 3, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure, and fig. 3 is a schematic structural view of a battery module according to some embodiments of the present disclosure. The battery 100 includes a battery case 10 and a battery cell 21, and the battery cell 21 is accommodated in the battery case 10. The battery case 10 is used to provide a receiving space for the battery cells 21, and the battery case 10 may have various structures. In some embodiments, the battery case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space for receiving the battery cell 21. Optionally, to ensure the sealing effect, both the first part 11 and the second part 12 are provided with cooperating flanges 13 at the edge positions. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a containing space; the first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the battery case 10 formed by the first and

second portions

11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, the number of the battery cells 21 may be plural, and the plural battery cells 21 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plural battery cells 21. The plurality of battery monomers 21 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 21 is accommodated in the box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 21 in series, in parallel, or in series-parallel to form a battery module 20, and then connecting a plurality of battery modules 20 in series, in parallel, or in series-parallel to form a whole, and accommodating them in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 21.

Wherein, the battery unit 21 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 21 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery module 20 according to an embodiment of the present disclosure. In fig. 3, the battery module 20 may include a plurality of battery cells 21, the plurality of battery cells 21 may be connected in series or in parallel or in series-parallel to form the battery module 20, and the plurality of battery modules 20 may be connected in series or in parallel or in series-parallel to form the battery 10. The battery cells 21 are generally divided into three types in an encapsulated manner: the battery pack comprises a cylindrical battery cell 21, a square battery cell 21 and a soft package battery cell 21, and the embodiment of the application is not limited to this. However, for the sake of brevity, the following embodiments are described by taking the square battery cell 21 as an example.

Fig. 4 is an exploded schematic view of a battery cell 21 according to some embodiments of the present disclosure. The battery cell 21 refers to the smallest unit constituting the battery 100. As shown in fig. 4, the battery cell 21 includes an end cap 211, a case 212, and an electrode assembly 213.

The end cap 211 refers to a member that covers an opening of the case 212 to isolate the internal environment of the battery cell 21 from the external environment. The shape of end cap 211 may be adapted to the shape of housing 212 to fit housing 212. Alternatively, the end cap 211 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 211 is not easily deformed when being impacted, and thus the battery cell 21 may have a higher structural strength and the safety performance may be improved. The end cap 211 may be provided with functional parts such as the electrode terminal 211 a. The electrode terminal 211a may be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric energy of the battery cell 21. In some embodiments, the end cap 211 may further include a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. In some embodiments, insulation may also be provided on the inside of end cap 211, which may be used to isolate electrically connected components within housing 212 from end cap 211 to reduce the risk of shorting. Illustratively, the insulator may be plastic, rubber, or the like.

The case 212 is an assembly for fitting the end cap 211 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to house the electrode assembly 213, an electrolyte (not shown in the drawings), and other components. The housing 212 and the end cap 211 may be separate components, and an opening may be formed in the housing 212, and the opening may be covered by the end cap 211 to form the internal environment of the battery cell 21. Alternatively, the end cover 211 and the housing 212 may be integrated, specifically, the end cover 211 and the housing 212 may form a common connecting surface before other components are inserted into the housing, and when it is required to encapsulate the interior of the housing 212, the end cover 211 covers the housing 212. The housing 212 may be a variety of shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 212 may be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention is not limited thereto.

The electrode assembly 213 is a part in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 may be contained within the housing 212. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 213, and the portions of the positive and negative electrode tabs having no active material each constitute a tab (not shown in the drawings). The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals 211a to form a current loop.

Referring to fig. 5 to 8, fig. 5 is a schematic structural diagram of a battery case according to a first embodiment of the present application;

FIG. 6 is a schematic structural diagram of a battery case according to a second embodiment of the present application; fig. 7 is a schematic structural view of a battery case according to a third embodiment of the present application; fig. 8 is a schematic structural view of a battery case 10 according to a fourth embodiment of the present application.

The first aspect of the present application provides a battery box 10, wherein an accommodating space enclosed by side walls is formed inside the battery box 10, a first side wall 111 on at least one side of the battery box 10 is provided with a support 30 arranged along an extending direction of the first side wall 111, and the support 30 abuts against a second side wall adjacent to the first side wall 111 to support the first side wall 111 of the battery box 10.

The battery case 10 provided by the embodiment improves the structural strength of the side wall of the battery case 10 by providing the support member 30 on the side wall, so that the pressure bearing capacity of the side wall of the battery case 10 is improved, and the risk that the side wall of the battery case 10 deforms and presses the battery module when bearing pressure is reduced. Moreover, the support members 30 are disposed on the side walls of the battery case 10 in the present application because the external pressing force applied to the battery case 10 is generally distributed on the side walls of the battery case 10, and the side walls of the battery case 10 deform and push the adjacent two battery modules to displace toward each other after being applied with the external pressing force.

In addition, it should be noted that the specific position and number of the first side walls 111 are not limited in the embodiments of the present application, because the first side walls 111 need to be determined according to the force-bearing direction of the battery case 10, and when the battery case 10 has a force-bearing direction, the first side may be disposed on one side corresponding to the force-bearing direction or on two opposite sides. Further, the shape of the supporting member 30 depends on the shape of the battery case 10, and the supporting member 30 may be configured in a rectangular shape, a bar shape, an arc shape, or a cross structure, which all belong to the protection scope of the present application, and for convenience of explaining specific embodiments of the present application, the supporting member 30 is explained in detail by taking a long side wall as the first side wall 111.

Alternatively, the battery case 10 is provided in a rectangular structure, and the first side wall 111 is provided as a long side wall corresponding to the length direction of the battery case 10 or a wide side wall corresponding to the width direction of the battery case 10.

In the present embodiment, the structure of the battery case 10 includes a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which will be explained below by providing the battery case 10 as a rectangular structure as a preferred embodiment, and correspondingly, the support member 30 may be a rectangular structure, an arc structure, or a cross structure. The supporting member 30 may be an integral structure, or may be a splicing structure formed by splicing a plurality of steel plates. The support member 30 may be made of a metal material such as carbon steel, spring steel, or a composite material. The support member 30 may be welded to the first sidewall 111 of the battery case 10, or may be detachably connected to the first sidewall 111 of the battery case 10.

Correspondingly, when the first side wall 111 is provided as a long side wall, the second side wall 114 is provided as a wide side wall corresponding to the width direction of the battery case 10, and when the first side wall 111 is provided as a wide side wall, the second side wall 114 is provided as a long side wall corresponding to the width direction of the battery case 10.

The first sidewall 111 of the supporting member 30 provided in this embodiment is determined according to the distribution of the external force received by the battery case 10, when the direction of the external force received by the battery case 10 is the same as the distribution direction of the long sidewall, the long sidewall is used as the first sidewall 111 to set the supporting member 30, when the direction of the external force received by the battery case 10 is the same as the distribution direction of the wide sidewall, the wide sidewall is used as the first sidewall 111 to set the supporting member 30, and when the direction of the external force received by the battery case 10 is distributed on the peripheral sidewalls of the battery case 10, the supporting members 30 are set on both the long sidewall and the wide sidewall.

Referring to fig. 5 to 8, alternatively, the battery case 10 is configured in a rectangular structure, and two supporting members 30 are disposed on two first side walls 111 of the battery case 10, which are oppositely disposed.

In this embodiment, the main force-receiving direction of the battery case 10 is determined according to the installation environment where the battery case 10 is located and the peripheral force-applying mechanism, the distribution direction of the supporting members 30 is determined according to the main force-receiving direction of the battery case 10 to be consistent with the main force-receiving direction of the battery case 10, then the two supporting members 30 are disposed on the two first side walls 111 of the battery case 10, which are consistent with the main force-receiving direction of the battery case 10, and the two supporting members 30 can support the two first side walls 111 in the main force-receiving direction of the battery case 10, so that the phenomenon that one side of the two first side walls 111 is deformed or the other side is concentrated in stress is reduced.

This embodiment can improve the atress equilibrium of battery box 10 through two support piece 30 of relative setting, reduces battery box 10 and appears one side after bearing external force and take place deformation or the phenomenon that the opposite side takes place stress concentration, reduces the lateral wall deformation of battery box 10 and bulldozes the risk of inside battery module.

Referring to fig. 5 to 8, optionally, in some embodiments, the first sidewall 111 of the battery case 10 is provided with receiving grooves 113 distributed along the extending direction of the first sidewall 111, and the supporting member 30 is detachably disposed in the receiving grooves 113.

In this embodiment, the receiving groove 113 may be disposed at the top, the bottom, or the side wall of the first side wall 111, the receiving groove 113 may be linearly extended, curvilinearly extended, or crosswise extended along the extending direction of the first side wall 111, the specific shape of the receiving groove 113 is consistent with the shape of the support 30, and the receiving groove 113 may be disposed in a clearance fit, a transition fit, an interference fit, or a snap fit with the support 30.

In the embodiment, the supporting member 30 is detachably disposed in the accommodating groove 113 of the first sidewall 111, so that the supporting member 30 can be conveniently replaced and maintained, and the applicability and the operational reliability of the supporting member 30 can be improved.

Referring to fig. 5 to 8, optionally, the battery box 10 includes a bottom case 110 having a top opening, a receiving space is formed inside the bottom case 110, and the first sidewall 111 is disposed on the bottom case 110.

The bottom housing 110 may be configured as a cylinder, a flat body, a cuboid, or other shapes, and the first side wall 111 is not limited to be distributed along a straight line, and may also be configured to be distributed along an arc-shaped structure curved surface, a broken line, or the like of the bottom housing 110.

In the embodiment, the first sidewall 111 is disposed on the bottom casing 110, and since the bottom casing 110 is a main stressed portion of the battery box 10, the risk that the bottom casing 110 deforms and presses the battery module can be reduced to the greatest extent.

Please refer to fig. 5 to 8. Optionally, the first sidewall 111 of the bottom case 110 is provided with a mounting table 112 or an interlayer, and the receiving groove 113 and the supporting member 30 are both provided on the mounting table 112 or the interlayer.

The receiving groove 113 is formed on the mounting table 112 by machining or the receiving groove 113 is formed by forming an interlayer between both side plates, and then the support member 30 is placed in the receiving groove 113.

The mounting table 112 or the interlayer provided by the embodiment provides a sufficient setting space for the accommodating groove 113 and the supporting member 30, and the setting convenience and the structural stability of the accommodating groove 113 and the supporting member 30 are improved.

Referring to fig. 5 to 8, optionally, the battery box 10 further includes a cover 120 covering the top opening of the bottom case 110, the cover 120 contacts the support 30, and the support 30 supports the bottom case 110 and the cover 120.

In the embodiment, the bottom of the receiving groove 113 contacts the bottom plate of the bottom housing 110, the top of the receiving groove 113 is provided as an opening, the receiving groove 113 is provided as a blind groove penetrating through the bottom plate of the bottom housing 110, the height of the supporting member 30 is the same as the depth of the receiving groove 113, or the height of the supporting member 30 is slightly lower than the depth of the receiving groove 113, when the cover 120 covers the top opening of the bottom housing 110, a part of the cover 120 contacts the top of the first sidewall 111, and another part of the cover 120 contacts the top of the supporting member 30, so that the supporting member 30 can support the bottom housing 110 and the cover 120.

The supporting member 30 of the present embodiment also has the technical effect of supporting the bottom case 110 and the cover 120, and can bear external force along the height direction of the battery case 10 to a certain extent.

Referring to fig. 5, optionally, the supporting member 30 according to the first embodiment of the present disclosure includes a strip plate 31 matched with the length of the accommodating groove 113 and two positioning rib plates 32 disposed at two ends of the strip plate 31, the strip plate 31 is in clearance fit with the accommodating groove 113, and the positioning rib plates 32 are disposed close to the accommodating groove 113.

The strip-shaped plate 31 and the two positioning rib plates 32 at the two ends form an I-shaped structure, and the accommodating groove 113 is an I-shaped groove matched with the shape of the supporting piece 30.

According to the combined structure of the strip-shaped plate 31 and the positioning rib plate 32 provided by the embodiment, on the premise that the weight of the support member 30 is reduced by the strip-shaped plate 31, the positioning rib plate 32 can support the support member 30, and the phenomenon that the support member 30 shakes in the accommodating groove 113 is reduced.

As shown in fig. 6, optionally, the support member 30 according to the second embodiment of the present application includes a strip-shaped plate 31 matched with the length of the receiving groove 113 and a plurality of wing plates 33 disposed at both ends and the side walls of the strip-shaped plate 31, the strip-shaped plate 31 is in clearance fit with the receiving groove 113, and the wing plates 33 are disposed close to the receiving groove 113.

A plurality of pterygoid lamina 33 are evenly equidistant distributes in the lateral wall of bar 31 to make bar 31 and a plurality of pterygoid lamina 33 constitute "not" style of calligraphy structure, holding tank 113 sets up to rectangular groove or "not" style of calligraphy groove with support piece 30's shape complex, bar 31 and a plurality of pterygoid lamina 33 can be through the sheet metal component shaping of bending, can also be through the mode machine-shaping of machining.

In the combined structure of the strip-shaped plate 31 and the plurality of wing plates 33 provided in this embodiment, the plurality of wing plates 33 can disperse stress, and the stress concentration phenomenon of the support member 30 after receiving an external force is reduced.

As shown in fig. 7, optionally, the supporting member 30 according to the third embodiment of the present application includes a strip-shaped plate 31 matching with the length of the receiving groove 113 and a plurality of sawtooth structures 34 disposed on the side wall of the strip-shaped plate 31, where the strip-shaped plate 31 is in clearance fit with the receiving groove 113, and the sawtooth structures 34 are disposed close to the receiving groove 113.

In some embodiments, the accommodating groove 113 is set as a sawtooth groove matched with the shape of the supporting member 30, the plurality of sawtooth structures 34 can be bent and formed through a sheet metal part, and can also be formed through machining, the plurality of sawtooth structures 34 are bent and formed through sheet metal parts, the difficulty of the manufacturing process of the plurality of sawtooth structures 34 can be reduced, the waste of materials can be reduced, the plurality of sawtooth structures 34 are formed through machining, and the structural strength of the supporting member 30 can be improved.

According to the combined structure of the strip-shaped plate 31 and the plurality of sawtooth structures 34 provided by the embodiment, the plurality of sawtooth structures 34 can play a role in dispersing stress, and the phenomenon of stress concentration of the support member 30 after bearing an external force is reduced.

As shown in fig. 8, the supporting member 30 according to the fourth embodiment of the present application optionally includes a hollow plate 36 disposed adjacent to the receiving groove 113, and a plurality of supporting ribs 35 are disposed inside the hollow plate 36 at intervals.

The holding tank 113 is set up to the rectangular structure with the shape fit of well hollow plate 36, and well hollow plate 36 and a plurality of brace rod 35 can form through the sheet metal component concatenation, can also be through the mode machine-shaping of machining.

The integrated configuration of the hollow plate 36 and the plurality of support ribs 35 inside that this embodiment proposes, the outer wall of the hollow plate 36 is smooth relatively, easy to assemble, and a plurality of support ribs 35 can play the effect of dispersion stress, reduce the stress concentration phenomenon of taking place after bearing external force of support piece 30.

Alternatively, the yield strength of the support member 30 is greater than that of the first sidewall 111 of the battery case 10.

In some embodiments, the support 30 may be provided as carbon steel or spring steel. The supporting member 30 provided in this embodiment can reduce the risk of deformation of the battery box 10, and under the condition that the battery box 10 has a deformation tendency due to external force, the supporting member 30 has no deformation tendency and thus can prevent the battery box 10 from deforming, thereby reducing the phenomenon that the battery box 10 extrudes the internal battery module after deforming.

A second aspect of the present application provides a battery including at least one battery module and the battery case 10 according to the first aspect of the present application, the at least one battery module being disposed in the receiving space of the battery case 10.

Optionally, the first sidewall 111 of the battery case 10 and the support 30 correspond to a distribution direction of the plurality of battery modules for limiting the facing movement between the adjacent two battery modules.

In some embodiments, the first sidewall 111 is not limited to a straight line structure, but may be a curved line structure or a broken line structure. In this embodiment, the first side wall 111 of the battery box 10 and the supporting member 30 correspond to the distribution direction of the plurality of battery modules, and when the battery box 10 receives an external force along the distribution direction of the plurality of battery modules, the supporting member 30 can reduce the deformation of the battery box 10 along the distribution direction of the plurality of battery modules, so as to reduce the occurrence of the collision short-circuit phenomenon of two adjacent battery modules.

Alternatively, the support 30 may be elastically and/or plastically deformed by an amount smaller than the interval between the adjacent two battery modules.

In some embodiments, the material of the supporting member 30 is selected according to the spacing between the battery modules, and when the spacing between the battery modules is small, the rigidity of the supporting member 30 is large, and when the spacing between the battery modules is large, the rigidity of the supporting member 30 is small.

The supporting member 30 of the present embodiment can serve to support the battery case 10 to reduce deformation, and at the same time, since the supporting member 30 has a certain elastic deformation capability and/or plastic deformation capability, the supporting member 30 can also reduce the fracture phenomenon of the supporting member 30 after being subjected to an external force due to too high rigidity by elastic deformation and/or plastic deformation.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. The utility model provides a battery box which characterized in that, the inside of battery box is formed with the accommodation space who is enclosed by the lateral wall, the first lateral wall of at least one side of battery box is provided with along the support piece that the extending direction of first lateral wall set up, just support piece with the adjacent second lateral wall butt of first lateral wall is in order to support the battery box first lateral wall.

2. The battery case according to claim 1, wherein the battery case is provided in a rectangular structure, and the first sidewall is provided as a long sidewall corresponding to a length direction of the battery case or a wide sidewall corresponding to a width direction of the battery case.

3. The battery box body as claimed in claim 1, wherein the battery box body is provided in a rectangular structure, and two of the supporting members are provided to the two oppositely-provided first side walls of the battery box body.

4. The battery box body as claimed in claim 1, wherein the first side wall of the battery box body is provided with receiving grooves distributed along an extending direction of the first side wall, and the supporting member is detachably placed in the receiving grooves.

5. The battery box body as claimed in claim 4, wherein the battery box body includes a bottom case having a top opening, the bottom case having an interior forming the receiving space, and the first sidewall is provided to the bottom case.

6. The battery box body of claim 5, wherein the first side wall of the bottom case is provided with a mounting table or an interlayer, and the receiving groove and the support member are both provided on the mounting table or the interlayer.

7. The battery box of claim 5, further comprising a cover covering the top opening of the bottom housing, wherein the cover contacts the support member, and the support member supports the bottom housing and the cover.

8. The battery box body according to claim 4, wherein the supporting member comprises a strip-shaped plate matched with the length of the accommodating groove and two positioning rib plates arranged at two ends of the strip-shaped plate, the strip-shaped plate is in clearance fit with the accommodating groove, and the positioning rib plates are arranged close to the accommodating groove.

9. The battery box body as claimed in claim 4, wherein the support member comprises a strip-shaped plate matched with the length of the accommodating groove and a plurality of wing plates arranged at two ends and side walls of the strip-shaped plate, the strip-shaped plate is in clearance fit with the accommodating groove, and the wing plates are arranged close to the accommodating groove.

10. The battery box body as claimed in claim 4, wherein the supporting member comprises a strip-shaped plate matched with the length of the accommodating groove and a plurality of sawtooth structures arranged on the side wall of the strip-shaped plate, the strip-shaped plate is in clearance fit with the accommodating groove, and the sawtooth structures are arranged close to the accommodating groove.

11. The battery box body as claimed in claim 4, wherein the supporting member comprises a hollow plate disposed closely to the receiving groove, and a plurality of supporting ribs are disposed inside the hollow plate at intervals.

12. The battery case according to any one of claims 1 to 11, wherein a yield strength of the support member is greater than a yield strength of the first side wall of the battery case.

13. A battery comprising at least one battery module and a battery case according to any one of claims 1 to 12, the at least one battery module being disposed in a receiving space of the battery case.

14. The battery of claim 13, wherein the first sidewall and the supporting member of the battery box correspond to a distribution direction of the plurality of battery modules for limiting a facing movement between two adjacent battery modules.

15. The battery according to claim 14, wherein the support member is elastically and/or plastically deformed by an amount smaller than a distance between two adjacent battery modules.