CN218385550U

CN218385550U - Battery pack and electric automobile

Info

Publication number: CN218385550U
Application number: CN202222490162.0U
Authority: CN
Inventors: 赵冬
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-01-24
Anticipated expiration: 2032-09-20

Abstract

The application provides a battery package and electric automobile for improve battery package's structural strength. The battery pack includes: a box body and a reinforcing structure; wherein the reinforcing structure comprises a first reinforcing beam and a second reinforcing beam which are arranged along the height direction of the box body; and the first reinforcing beam and the second reinforcing beam are respectively and fixedly connected with the side frame of the box body. In the technical scheme, the first reinforcing beam and the second reinforcing beam are arranged in the height direction, so that the structural strength of the side frame is improved, and the deformation condition of the side frame caused by long length is improved. In addition, the first reinforcing beam and the second reinforcing beam also improve the structural strength of the whole box body, reduce the deformation of the box body, improve the installation and sealing effects of the box body and further improve the protection effect on the battery.

Description

Battery pack and electric automobile

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack and an electric automobile.

Background

With the continuous development of battery technology, the assembly process of the battery pack is changed day by day. When a newer assembly process is adopted, the batteries are stacked into groups, and then the frames of the battery box are assembled. During specific assembly, the batteries are stacked, and then the frames of the battery boxes are spliced from the periphery to form a complete battery pack.

However, when the frame of the current battery box is assembled, the side frame of the frame is long, so that deformation exists in the assembling process, and the requirements of installation, positioning, sealing and the like are influenced.

SUMMERY OF THE UTILITY MODEL

The application provides a battery package and electric automobile for improve the assembly effect of battery package.

In a first aspect, a battery pack is provided, which includes: a box body and a reinforcing structure; wherein the content of the first and second substances,

the reinforcing structure comprises a first reinforcing beam and a second reinforcing beam which are arranged along the height direction of the box body; and the first reinforcing beam and the second reinforcing beam are respectively and fixedly connected with the side frame of the box body.

In above-mentioned technical scheme, through setting up first stiffening beam and second stiffening beam along direction of height, improved the structural strength of side frame, improved the side frame because the longer condition that leads to the deformation of length. In addition, the first reinforcing beam and the second reinforcing beam also improve the structural strength of the whole box body, reduce the deformation of the box body, improve the installation and sealing effects of the box body and further improve the protection effect on the battery.

In a second aspect, an electric vehicle is provided, which includes a vehicle chassis and the battery pack of any one of the above items; wherein, the battery package is fixed in the automobile chassis.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a battery box according to an embodiment of the present application;

fig. 4 is a schematic diagram of a liquid cooling plate and a box body according to an embodiment of the present application.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

To facilitate understanding of the battery pack provided in the embodiment of the present application, an application scenario of the battery pack is first described, and the battery pack provided in the embodiment of the present application is applied to vehicles, such as electric automobiles, electric buses, and electric trucks, as a power source. The battery pack comprises a box body and a battery arranged in the box body. When the box body of the battery pack is manufactured, the box body is assembled, the size of the corresponding box body is gradually increased along with the increasing energy of the current battery, the deformation of the box body is inevitably caused, and the reliability of the assembled box body is influenced. The details are described below with reference to specific drawings and examples.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a battery pack provided in an embodiment of the present application. The battery pack provided in the embodiment of the present application mainly includes a case 100 and a battery pack 200 located in the case 100.

The battery pack 200 includes a plurality of cells 210. A plurality of cells 210 are arranged in an array. The cells 210 are in an m x n array, where m and n are positive integers greater than or equal to 1.

The box 100 may take different shapes as the structure for carrying the battery 210, and in the embodiment of the present application, the box 100 is a rectangular parallelepiped structure, which specifically includes a bottom plate and a side wall disposed around the bottom plate, and the bottom plate and the side wall are fixedly connected to enclose a space for accommodating the battery 210. The box 100 is open at the top, wherein the top of the box 100 refers to the end of the box 100 facing the chassis when the box is fixed on the chassis of the automobile.

When the box 100 is formed, the bottom plate and the side wall may be in a separate structure, the bottom plate and the side wall may be fixedly connected by different methods such as welding or bonding, and the connection between the bottom plate and the side wall may be sealed by a gasket. Or the bottom plate and the side wall can be of an integral structure and are prepared in an integral forming mode during preparation.

Referring also to fig. 2, in the embodiment of the present application, the side wall of the case 100 may be referred to as a side frame 110 of the case 100. To improve the structural strength of the side frame 110. The box 100 provided by the embodiment of the application is provided with a reinforcing structure. The reinforcing structure includes a first reinforcing beam 120 and a second reinforcing beam 130 arranged in the height direction of the cabinet 100; and the first reinforcing beam 120 and the second reinforcing beam 130 are respectively fixedly connected to the side frames 110 of the cabinet 100.

In the above technical solution, the first reinforcing beam 120 and the second reinforcing beam 130 are arranged along the height direction, so that the structural strength of the whole box body 100 is improved, the deformation of the box body 100 is reduced, the installation and sealing effects of the box body 100 are improved, and the protection effect on the battery 210 is further improved.

Referring to fig. 2, the first reinforcing beam 120 is located at an outer side of the side frame 110, and the outer side of the side frame 110 is referred to as a side of the side frame 110 facing away from a space in which the battery 210 is accommodated. When the first reinforcing beam 120 is provided, the longitudinal direction of the first reinforcing beam 120 extends in the longitudinal direction of the side frame 110, the thickness direction of the first reinforcing beam 120 extends in the height direction of the side frame 110, and the width direction of the first reinforcing beam 120 extends in the width direction perpendicular to the side frame 110.

With continued reference to fig. 2, when the first reinforcing beam 120 protrudes outward from the side frame 110, the first reinforcing beam 120 may serve as a protruding rib of the side frame 110, so as to improve the structural strength of the side frame 110, and in the length direction with a larger size, the bending condition of the side frame 110 may be improved, and the structural strength of the side frame 110 may be improved, so as to reduce the deformation of the side frame 110 when the box body 100 is assembled, improve the sealing performance of the assembled box body 100, and improve the assembling effect.

The first reinforcing beam 120 and the side frame 110 may be connected in different manners. Illustratively, the first reinforcing beam 120 is integrally formed with the side frame 110, and when integrally formed, it may be directly integrally formed during casting. The first reinforcing beam 120 and the side frame 110 may also adopt a split structure, and when the split structure is adopted, the first reinforcing beam 120 and the side frame 110 are fixedly connected together in a welding manner.

It should be understood that, in the embodiment of the present application, the first reinforcing beam 120 serves as a member for increasing the structural strength of the side frame 110, on the one hand, and the first reinforcing beam 120 also serves as a connecting structure when the tank 100 is connected to the chassis of the automobile, on the other hand. When the first reinforcing beam 120 is used as a connecting structure for connecting to the chassis of the vehicle, the first reinforcing beam 120 is positioned above the second reinforcing beam 130 in the height direction of the tank 100. So that the first reinforcement beam 120 can be closer to the chassis of the automobile for convenient connection with the chassis of the automobile.

Referring to fig. 3 together, the first reinforcing beam 120 is provided with a mounting hole 121 for hoisting a battery pack, and the mounting hole 121 is used for penetrating a threaded connector for hoisting the battery pack. When the mounting holes 121 are provided, the number of the mounting holes 121 is plural, and the plural mounting holes 121 are arranged in a single row, two rows, or two or more rows at intervals in the longitudinal direction of the first reinforcing beam 120. In the embodiment of the present application, a row of mounting holes 121 is adopted, on one hand, it is ensured that the bolt assemblies inserted through the mounting holes 121 can stably fix the box body 100 on the chassis of the vehicle, and on the other hand, fewer mounting holes 121 can reduce the influence on the structural strength of the first reinforcing beam 120.

As an alternative, the upper surface of the first reinforcing beam 120 is flush with the upper surface of the box body 100; the upper surface of the box 100 is a surface of the box 100 to which the box cover is attached. Specifically, when the first reinforcing beam 120 is disposed, the upper surface of the first reinforcing beam 120 is flush with the upper surface of the side frame 110, so that the first reinforcing beam 120 can be better attached to the chassis when the container 100 is fixed to the chassis. The upper surface of the first reinforcing beam 120 refers to a surface of the first reinforcing beam 120 facing the vehicle chassis when the tank 100 is coupled to the vehicle chassis.

With continued reference to fig. 2 and 3, the second reinforcement beam 130 is arranged in a manner similar to the first reinforcement beam 120. Illustratively, the second reinforcement beam 130 may be selected to be disposed parallel to the first reinforcement beam 120. When the second reinforcement beam 130 is specifically provided, the longitudinal direction of the second reinforcement beam 130 extends along the longitudinal direction of the side frame 110, the thickness direction of the second reinforcement beam 130 extends along the height direction of the side frame 110, and the width direction of the second reinforcement beam 130 extends perpendicular to the width direction of the side frame 110.

When the second reinforcing beam 130 protrudes outward from the side frame 110, the second reinforcing beam 130 may serve as a rib of the side frame 110, thereby improving the structural strength of the side frame 110. For example, in the length direction with a larger size, the bending condition of the side frame 110 can be improved, and the structural strength of the side frame 110 is improved.

When the first and second reinforcing

beams

120 and 130 are provided in the height direction, the structural strength of the side frame 110 may be further increased by the cooperation of the first and second reinforcing

beams

120 and 130.

As an alternative, when the first reinforcing beam 120 is adjacent to the upper surface of the side frame 110, the second reinforcing beam 130 is disposed adjacent to the lower surface of the side frame 110.

The second reinforcement beam 130 may be connected to the side frame 110 in different ways. For details, reference may be made to the connection manner of the first reinforcing beam 120 and the side frame 110, which is not described herein again.

As can be seen from the above, by providing the first reinforcing beam 120 and the second reinforcing beam 130 in the height direction, the structural strength of the side frame 110 is improved, and the deformation of the side frame 110 due to the long length is improved. In addition, the first reinforcement beam 120 and the second reinforcement beam 130 also improve the structural strength of the entire case 100, reduce the deformation amount of the case 100, improve the mounting and sealing effects of the case 100, and further improve the battery protection effect.

As an alternative, the thickness of the first reinforcement beam 120 is greater than the thickness of the second reinforcement beam 130. When the first reinforcing beam 120 is provided with the mounting hole, the first reinforcing beam 120 has the function of hoisting the beam, and the strength of the beam can be improved by adopting larger thickness, so that the deformation of the box body is prevented. In addition, the first reinforcing beam 120 and the second reinforcing beam 130 can improve the structural strength of the box body 100, and can reduce the influence on the weight of the box body 100 while improving the strength of the side frames 110. Further, the width of the first reinforcing beam 120 in the direction away from the box 100 may be selected to be larger than the width of the second reinforcing beam 130 in the direction away from the box 100. That is, the width and thickness of the first reinforcing beam 120 are greater than those of the second reinforcing beam 130. The above-described effects can also be achieved.

As an alternative, when the second reinforcement beam 130 is provided, a plurality of notches 131 are provided on the second reinforcement beam 130. The plurality of notches 131 are arranged at intervals along the length direction of the second reinforcing beam 130, and the opening direction of the notches 131 is located on the side of the second reinforcing beam 130 away from the side frame 110. When specifically setting up breach 131, follow the angle observation of perpendicular to side frame 110, breach 131 can be rectangle breach 131 or U-shaped breach 131, or other dysmorphism breachs 131. The notch 131 can reduce the weight of the second reinforcing beam 130, and the notch 131 can provide energy absorption and cushioning by the structure. When the battery pack is collided by an external force, the second reinforcing beam 130 protrudes outward from the side frame 110 and is located at the bottom of the side frame 110, so that the collision object firstly contacts the second reinforcing beam 130, and the deformation amount of the second reinforcing beam 130 can be increased through the notch 131 on the second reinforcing beam 130, thereby absorbing collision energy and providing a buffering effect.

As an alternative, the notch 131 can be used as a structure for mounting the bolt avoidance module, in addition to a structure for absorbing collision energy. At this time, the arrangement positions of the notches 131 correspond one-to-one to the arrangement positions of the mounting holes 121. I.e., along a reference plane perpendicular to the height direction of the side frame 110, the perpendicular projection of the mounting hole 121 on the reference plane is located within the projection of the notch 131. When the bolt assembly is arranged in the mounting hole 121 of the first reinforcing beam 120 in a penetrating manner, the arranged notch 131 can avoid the bolt assembly, so that the bolt assembly can conveniently penetrate into the mounting hole 121. In addition, the arranged notch 131 can avoid an operation tool for screwing or unscrewing the bolt assembly, so that the battery pack can be conveniently hoisted or detached.

Referring to fig. 1 and 4 together, when the battery pack according to the embodiment of the present disclosure includes a battery pack 200, a liquid cooling plate 220 is further provided to dissipate heat of a battery 210 in the battery pack 200. The battery pack 200 includes a plurality of cells 210 and a plurality of liquid cooling plates 220; the plurality of cells 210 are alternately arranged with the plurality of liquid-cooling plates 220. Illustratively, when the battery pack 200 is assembled, the plurality of cells 210 are arranged in an array, and the liquid-cooled plates 220 are interposed between the cells 210 in adjacent rows, that is, in the column direction, the cells 210 and the liquid-cooled plates 220 are alternately arranged.

In the embodiment of the present application, when the liquid cooling plate 220 is attached to the battery 210, the liquid cooling plate 220 is attached to the large side of the battery 210. Wherein the large side of the battery 210 is referred to as the side having the largest area among the sides of the battery 210.

Referring to fig. 2 and 4 together, in order to improve the stability of the liquid cooling plates 220, when the liquid cooling plates 220 are provided, an end of each liquid cooling plate 220 is fixedly coupled to the side frame 110 of the cabinet 100. When the battery pack 200 is assembled, the ends of the liquid cooling plate 220 are exposed to the outside of the cells 210 and may be inserted into the side frames 110 for fixation.

Illustratively, a mounting groove 111 is provided on the inner sidewall of the side frame 110 to mate with an end of the liquid cooling plate 220, and when assembling, the end of the liquid cooling plate 220 may be inserted into the mounting groove 111 for fixing, thereby enhancing the stability of the liquid cooling plate 220.

As an alternative, when the liquid cooling plate 220 is connected to the side frame 110, the end of the liquid cooling plate 220 fixedly connected to the side frame 110 of the tank 100 is located between the first reinforcing beam 120 and the second reinforcing beam 130. As shown in fig. 4, the second reinforcement beam 130 is positioned below the end of the liquid cooling panel 220 and the first reinforcement beam 120 is positioned above the end of the liquid cooling panel 220 in the height direction of the side frame 110. When the end portion connecting the liquid cooling plate 220 and the side frame 110 is interposed between the first reinforcing beam 120 and the second reinforcing beam 130, the risk of the end portion of the liquid cooling plate 220 being collided by an external force is reduced. The safety of the battery pack 200 in the case 100 is improved.

As an alternative, the end of the liquid cooled plate 220 inserted into the mounting channel is wrapped with an insulating sleeve 221, and the insulating sleeve 221 electrically isolates the side frame 110 from the liquid cooled plate 220.

The embodiment of the application also provides an electric automobile, which comprises an automobile chassis and any one of the battery packs; wherein, the battery package is fixed in the vehicle chassis. In the technical scheme, the first reinforcing beam and the second reinforcing beam are arranged in the height direction, so that the structural strength of the side frame is improved, and the deformation condition of the side frame caused by long length is improved. In addition, the first reinforcing beam and the second reinforcing beam also improve the structural strength of the whole box body, reduce the deformation of the box body, improve the installation and sealing effects of the box body and further improve the protection effect on the battery.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience in describing and simplifying the present application, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. A battery pack, comprising: a box body and a reinforcing structure; wherein the content of the first and second substances,

2. The battery pack of claim 1, wherein the first reinforcing beam has a thickness greater than a thickness of the second reinforcing beam.

3. The battery pack according to claim 1, wherein the first reinforcing beam is located above the second reinforcing beam in a height direction of the case, and the first reinforcing beam is provided with a mounting hole for lifting the battery pack.

4. The battery pack of claim 3, wherein an upper surface of the first stiffening beam is flush with an upper surface of the case; the upper surface of the box body is the surface of the box body and the box cover which are attached.

5. The battery pack of claim 3, wherein the second reinforcement beam is provided with a plurality of notches.

6. The battery pack according to claim 5, wherein the notches are provided at positions corresponding to positions of the mounting holes one to one.

7. The battery pack according to any one of claims 1 to 6, further comprising a battery pack disposed in the case; wherein the battery pack comprises a plurality of batteries and a plurality of liquid cooling plates; the plurality of batteries and the plurality of liquid cooling plates are alternately arranged;

the end part of each liquid cooling plate is fixedly connected with the side frame of the box body.

8. The battery pack of claim 7, wherein the end of the liquid cooling plate fixedly connected to the side frame of the case is located between the first reinforcing beam and the second reinforcing beam.

9. The battery pack according to claim 7, wherein the first reinforcing beam has a width in a direction away from the case that is larger than a width of the second reinforcing beam in a direction away from the case.

10. An electric vehicle comprising a vehicle chassis and a battery pack according to any one of claims 1 to 9; wherein, the battery package is fixed in the automobile chassis.