CN217281052U

CN217281052U - Module frame and battery module

Info

Publication number: CN217281052U
Application number: CN202220383497.XU
Authority: CN
Inventors: 高德健; 郑琳; 谭壮
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-23
Anticipated expiration: 2032-02-24

Abstract

The embodiment of the utility model provides a module frame and battery module relates to secondary battery technical field. The module frame includes a side plate, an end plate, and a reinforcing plate. The side plates and the end plates are both made of aluminum alloy with the magnesium element content of less than 5% and/or the silicon element content of less than 12%. Curb plate, reinforcing plate and curb plate enclose to close and form the accommodation space, and the accommodation space is used for the holding electricity core. The reinforcing plate is arranged between the end plate and the side plate, the reinforcing plate and the side plate are connected through welding. The reinforcing plate is an aluminum alloy with the magnesium element content of more than 5% and/or the silicon element content of more than 12%. The welding device can improve or avoid the defects of hot cracks, transverse cracks and the like generated in the welding of the side plates and the end plates of the module frame.

Description

Module frame and battery module

Technical Field

The utility model relates to a secondary battery technical field particularly, relates to a module frame and battery module.

Background

A secondary battery is also called a rechargeable battery or a secondary battery, and refers to a battery that can be continuously used by activating an active material by charging after the battery is discharged.

The secondary battery generally comprises a module frame and a battery cell, and the battery cell is mounted on the module frame so as to protect the battery cell through the module frame.

Most of the existing module frames are formed by welding and splicing two end plates and two side plates through laser welding, however, because the content of magnesium or silicon in the end plates and the side plates is low, the defects of heat cracks, transverse cracks and the like are easily generated when the side plates and the end plates are welded through laser welding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a module frame and battery module, its curb plate and the end plate that can improve or avoid module frame produce defects such as hot crack and transverse crack in the welding.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a module frame, comprising side plates, end plates, and reinforcing plates; the side plates and the end plates are both made of aluminum alloy with the magnesium element content of less than 5% and/or the silicon element content of less than 12%; the side plate, the reinforcing plate and the side plate enclose to form an accommodating space, and the accommodating space is used for accommodating the battery cell; the reinforcing plate is arranged between the end plate and the side plate, the reinforcing plate and the side plate are connected through welding; the reinforcing plate is an aluminum alloy with the magnesium element content of more than 5% and/or the silicon element content of more than 12%.

In an alternative embodiment, the side plates and the end plates are both made of a 6-series aluminum alloy and the reinforcing plate is a 5083 or 5a06 type aluminum alloy.

In an alternative embodiment, the thickness of the reinforcing plate ranges from 0.1mm to 2 mm.

In an optional embodiment, the module frame further includes a first welding portion, and the side plate, the reinforcing plate, and the end plate that are adjacent in this order are connected by the first welding portion.

In an optional embodiment, a range of a weld penetration of the first weld portion is 4mm to 5mm, and a range of a weld penetration of the first weld portion is 2mm to 4 mm.

In an optional embodiment, the thickness of the reinforcing plate ranges from 2mm to 10 mm.

In an alternative embodiment, the module frame further includes a second welding portion and a third welding portion, the adjacent side plates and the reinforcement plate are connected by the second welding portion, and the adjacent reinforcement plate and the end plate are connected by the third welding portion.

In an optional embodiment, the welding penetration ranges of the second welding portion and the third welding portion are both 4mm to 5mm, and the welding penetration ranges of the second welding portion and the third welding portion are both 2mm to 4 mm.

In an alternative embodiment, the number of the side plates comprises two, and the two side plates are oppositely arranged;

the number of the end plates comprises two, the two end plates are oppositely arranged, and the two end plates are clamped between the two side plates;

the quantity of reinforcing plate includes four, four the reinforcing plate set up respectively in the tip of end plate, and two curb plate, four reinforcing plate and two the curb plate encloses to close and forms the rectangle the accommodation space.

In a second aspect, the present invention provides a battery module, including electric core and any one of the foregoing embodiments the module frame, electric core set up in the accommodation space.

The embodiment of the utility model provides a battery module and secondary battery's beneficial effect includes:

because the aluminum alloy with low content of magnesium element and silicon element of the aluminum alloy is easier to form eutectic alloy in the laser welding process, cracks are easier to form in the laser welding process. This application is through setting up the reinforcing plate that magnesium element content is greater than 5% and/or silicon element content is greater than 12% aluminum alloy and makes between curb plate and end plate, thereby when curb plate and end plate welding, thereby can pass through the reinforcing plate that sets up between end plate and curb plate when welding transition, thereby because the magnesium element content of reinforcing plate is greater than 5% and/or silicon element content is greater than 12% and can improve end plate and curb plate and appear eutectic alloy in the welding, thereby avoid the production of hot crack or horizontal crackle.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a module frame according to an embodiment of the present invention.

The icon is 100-module frame; 110-side plate; 130-an end plate; 150-a reinforcing plate; 170-an accommodating space; 300-a battery module; 310-electric core.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1, an embodiment of the present invention provides a battery module 300, where the battery module 300 includes a module frame 100 and a battery cell 310 disposed in the module frame 100. The module frame 100 is used to protect and fix the battery cell 310.

Referring to fig. 2, in the present embodiment, the module frame 100 includes side plates 110, end plates 130, and reinforcing plates 150. The side plates 110 and the end plates 130 are made of aluminum alloys of different types. The side plate 110, the reinforcing plate 150 and the side plate 110 enclose to form an accommodating space 170, and the accommodating space 170 is used for accommodating the battery cell 310. The reinforcing plate 150 is disposed between the end plate 130 and the side plate 110, the reinforcing plate 150 and the side plate 110 are connected by welding. The reinforcing plate 150 is an aluminum alloy containing more than 5% of magnesium and/or more than 12% of silicon.

Because the aluminum alloy with low content of magnesium element and silicon element of the aluminum alloy is easier to form eutectic alloy in the laser welding process, cracks are easier to form in the laser welding process. In the embodiment, the reinforcing plate 150 made of the aluminum alloy with the magnesium element content of more than 5% and/or the silicon element content of more than 12% is arranged between the side plate 110 and the end plate 130, so that when the side plate 110 and the end plate 130 are welded, transition can be performed when welding is performed through the reinforcing plate 150 arranged between the end plate 130 and the side plate 110, eutectic alloy can be improved when the end plate 130 and the side plate 110 are welded due to the fact that the magnesium element content of the reinforcing plate 150 is more than 5% and/or the silicon element content of more than 12%, and therefore generation of hot cracks or transverse cracks is avoided.

It should be noted that the reinforcing plate 150 mentioned in the present application is an aluminum alloy with a magnesium content of more than 5% and/or a silicon content of more than 12%, and does not relate to the improvement of the material itself, but is selected from the existing aluminum alloys to satisfy the requirements of the magnesium content of more than 5% and/or the silicon content of more than 12%.

In this embodiment, the stiffener plate 150 is a 5083 or 5a06 type aluminum alloy. The end plate 130 and the side plate 110 are made of six-series aluminum alloy.

Referring to fig. 2, in the present embodiment, the thickness of the reinforcing plate 150 ranges from 0.1mm to 2 mm. The thickness of the reinforcing plate 150 is 0.1mm-2mm, so that welding is facilitated.

In this embodiment, the module frame 100 further includes a first welding portion, and the side plate 110, the reinforcing plate 150 and the end plate 130 which are adjacent in sequence are connected by the first welding portion. I.e., the side plate 110, the reinforcing plate 150 and the end plate 130, are formed by welding through one weld.

In this embodiment, the range of the weld penetration of the first weld portion is 4mm to 5mm, and the range of the weld penetration of the first weld portion is 2mm to 4 mm.

It should be noted that the weld penetration refers to the surface or effective width of the weld melted region. The welding fusion width of the first welding portion is set to be 4mm-5mm, and the side plate 110, the reinforcing plate 150 and the end plate 130 can be directly welded together through one welding seam. The welding penetration is the distance between the deepest position of the melting part of the base metal and the surface of the base metal. The welding strength can be better ensured by setting the value range of the welding penetration to be 2-4 mm.

Referring to fig. 2, in the present embodiment, the number of the side plates 110 includes two, and the two side plates 110 are disposed oppositely. The number of the end plates 130 includes two, the two end plates 130 are oppositely disposed, and the two end plates 130 are clamped between the two side plates 110. The number of the reinforcing plates 150 includes four, four reinforcing plates 150 are respectively disposed at the end portions of the end plates 130, and the two side plates 110, four reinforcing plates 150 and two side plates 110 enclose the rectangular accommodating space 170. The battery cell 310 is accommodated in the accommodating space 170.

Referring to fig. 2, in the present embodiment, grooves are disposed on two sides of the end plate, two ends of the end plate are respectively abutted to two side plates, so that the grooves are formed between the end plate and the side plates, the reinforcing plate is disposed in the grooves, so that the inner side of the module frame is sealed by the abutment of the end plate and the side plates, and the reinforcing plate is mounted in the grooves.

In other embodiments of the present application, the thickness of the stiffener plate 150 ranges from 2mm to 10 mm. The module frame 100 further includes a second welding portion and a third welding portion, the adjacent side plate 110 and the reinforcement plate 150 are connected by the second welding portion, and the adjacent reinforcement plate 150 and the end plate 130 are connected by the third welding portion. That is, the side plate 110, the reinforcing plate 150 and the end plate 130 are welded by two weld seams to be connected to form a whole. The value range of the welding fusion width of the second welding part and the third welding part is 4mm-5mm, and the value range of the welding fusion depth of the second welding part and the third welding part is 2mm-4 mm.

The working principle and the beneficial effects of the module frame 100 and the battery module 300 provided by the embodiment of the application include:

in the embodiment, the reinforcing plate 150 made of the aluminum alloy with the magnesium element content of more than 5% and/or the silicon element content of more than 12% is arranged between the side plate 110 and the end plate 130, so that when the side plate 110 and the end plate 130 are welded, transition can be performed during welding through the reinforcing plate 150 arranged between the end plate 130 and the side plate 110, eutectic alloy can be improved when the end plate 130 and the side plate 110 are welded due to the fact that the magnesium element content of the reinforcing plate 150 is more than 5% and/or the silicon element content of the reinforcing plate is more than 12%, and therefore generation of hot cracks or transverse cracks can be avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular frame comprising side plates, end plates and reinforcing plates;

the side plates and the end plates are both made of 6-series aluminum alloy;

the side plate, the reinforcing plate and the side plate enclose to form an accommodating space, and the accommodating space is used for accommodating the battery cell;

the reinforcing plate is arranged between the end plate and the side plate, the reinforcing plate and the side plate are connected through welding;

the reinforcing plate is made of 5083 or 5a06 type aluminum alloy.

2. The module frame of claim 1, wherein the thickness of the stiffener plate ranges from 0.1mm to 2 mm.

3. The modular frame of claim 2 further comprising a first weld by which the side plates, the reinforcement plate, and the end plate that are sequentially adjacent are connected.

4. The module frame according to claim 3, wherein the weld penetration of the first weld portion ranges from 4mm to 5mm, and the weld penetration of the first weld portion ranges from 2mm to 4 mm.

5. The module frame of claim 1, wherein the thickness of the stiffener plate ranges from 2mm to 10 mm.

6. The modular frame of claim 5 further comprising a second weld and a third weld, adjacent side plates and the reinforcement plate being connected by the second weld, adjacent reinforcement plate and the end plate being connected by the third weld.

7. The module frame according to claim 6, wherein the weld penetration of the second weld and the third weld both range from 4mm to 5mm, and the weld penetration of the second weld and the third weld both range from 2mm to 4 mm.

8. The module frame of claim 1, wherein the number of side plates comprises two, the two side plates being disposed opposite each other;

9. A battery module, comprising a battery cell and the module frame of any one of claims 1 to 8, wherein the battery cell is disposed in the accommodating space.