CN218548667U

CN218548667U - Module frame and battery module

Info

Publication number: CN218548667U
Application number: CN202222873095.0U
Authority: CN
Inventors: 何亚飞; 张毛毛
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-02-28
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a module frame and battery module, the module frame includes a pair of parallel arrangement's curb plate and a pair of parallel arrangement's end plate, wherein, the module frame still includes at least one medium plate subassembly, medium plate subassembly parallel arrangement is in a pair of between the curb plate and include first medium plate and second medium plate, first medium plate with the second medium plate all includes the main part and is located the tip at main part both ends, wherein, first medium plate the tip has downwardly extending part, and the second medium plate the tip has upwardly extending part, works as first medium plate with when the second medium plate is spliced from top to bottom, first medium plate the main part with the second medium plate the main part is on same vertical plane and first medium plate the tip with the second medium plate the tip staggers each other and the edge flushes, and first medium plate the tip with the second medium plate the tip all connect in the end plate.

Description

Module frame and battery module

Technical Field

The utility model relates to a power battery field specifically relates to a module frame and battery module.

Background

The power battery is a power source of a new energy automobile and mainly comprises a lithium iron phosphate battery, a lithium manganate battery, a ternary material battery and the like. The power battery is divided into a hard-package battery and a soft-package battery. Soft-package batteries are becoming mainstream due to their advantages of high energy sealing, low internal resistance, and the like.

The battery module mainly comprises a module frame and a plurality of electric core groups. The module frame comprises a middle plate, and the middle plate is used for separating two adjacent electric core groups. In order to minimize the volume of the battery module, the gap between the cell and the module frame is generally small. Like this, when the inflation appears in the use in electric core, will oppress the medium plate of module frame. Because the medium plate welding strength of current module frame is not enough, the electric core inflation makes the welding seam split easily, causes the battery trouble.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a module frame and battery module to solve above-mentioned problem.

In order to achieve the above object, the utility model adopts the following technical scheme:

according to an aspect of the present invention, there is provided a module frame, comprising a pair of parallel side plates and a pair of parallel end plates, wherein the module frame further comprises at least one middle plate assembly, the middle plate assembly is arranged in parallel between the side plates and comprises a first middle plate and a second middle plate, the first middle plate and the second middle plate both comprise a main body and end portions located at both ends of the main body, wherein the end portion of the first middle plate has a downward extending portion, and the end portion of the second middle plate has an upward extending portion, when the first middle plate and the second middle plate are spliced up and down, the main body of the first middle plate and the main body of the second middle plate are on the same vertical plane and the end portions of the first middle plate and the second middle plate are staggered with each other and flush at the edges, and the end portion of the first middle plate and the end portion of the second middle plate are all connected to the end plates.

In a preferred embodiment, the end plate has a slot, and the end of the first middle plate and the end of the second middle plate are inserted into the slot.

In a preferred embodiment, the slot is a through slot.

In a preferred embodiment, the slot tapers from the inside to the outside.

In a preferred embodiment, the end of the first middle plate and the end of the second middle plate each include a straight portion of a tip and a curved portion between the straight portion and the body.

In a preferred embodiment, the ends of the first middle plate and the second middle plate are welded to the end plates.

In a preferred embodiment, the width of the end of the middle plate assembly is smaller than the width of the main body of the middle plate assembly.

In a preferred embodiment, the first midplane and the second midplane have the same width.

In a preferred embodiment, the middle plate assembly further comprises an insulating film which is hot-pressed and coated on the main body of the first middle plate and the main body of the second middle plate.

According to the utility model discloses a further aspect provides a battery module, wherein, battery module includes module frame and two at least electric core groups, wherein, the module frame is as above the module frame, and the medium plate subassembly is adjacent two the electric core group separates.

The above technical scheme is adopted in the utility model, the beneficial effect who has is that, because the area of being connected between the tip of medium plate subassembly and the end plate increases, can improve the bulk strength of module frame, increase of service life to the equipment is convenient.

Drawings

Fig. 1 is an exploded perspective view of a battery module according to the present invention;

fig. 2 is a perspective view of a module frame of the battery module shown in fig. 1;

FIG. 3 is a perspective view of a midplane assembly of the module frame of FIG. 2;

FIG. 4 is an exploded perspective view of the midplane assembly shown in FIG. 3;

FIG. 5 is a front view of an end plate of the module frame shown in FIG. 2;

fig. 6 isbase:Sub>A cross-sectional view of the end plate taken along linebase:Sub>A-base:Sub>A in fig. 5.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but 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 application, it is further noted that, unless expressly stated or limited otherwise, 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 application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 and 2, the battery module of the present invention includes a module frame 1, an upper cover 2, a bus bar (CCS) 3, and a cell assembly 4. The module frame 1 includes a pair of side plates 11 arranged in parallel, a pair of end plates 12 arranged in parallel, and a middle plate assembly 13 arranged in parallel between the pair of side plates 11 and having both ends connected to the pair of end plates 12. The pair of side plates 11 and the pair of end plates 12 are welded together to form a rectangular frame. Two groups of electric cores 4 are arranged in the module frame 1 in parallel to the side plates 11, and a middle plate assembly 13 is used to separate the two groups of electric cores 4. It should be understood that the number of the electric core groups 4 is not limited to 2, and accordingly, the number of the middle plate assemblies 13 is not limited to 1. That is, the number of the middle plate assemblies 13 is 1 less than the number of the electric core groups. The upper cover 2, the integrated busbar (CCS) 3 and the electric core assembly 4 are conventional structures and will not be further described herein.

As shown in fig. 3 and 4, the midplane assembly 13 comprises a first midplane (also referred to as an upper midplane) 131 and a second midplane (also referred to as a lower midplane) 132, each of the first midplane 131 and the second midplane 132 comprising a

body

1311 and 1321 and

ends

1312 and 1322 at both ends of the

bodies

1311 and 1321, wherein end 1312 of the first midplane 131 has a downwardly extending portion 13121 and end 1322 of the second midplane 132 has an upwardly extending portion 13221. When the first middle plate 131 and the second middle plate 132 are spliced up and down, the body 1311 of the first middle plate 131 and the body 1321 of the second middle plate 132 are on the same vertical plane and the end 1312 of the first middle plate 131 and the end 1322 of the second middle plate 132 are offset from each other and flush in edge. Thus, the thickness of the end of the mid-plate assembly 13 is at least one time the thickness of the body. That is, the connection area between the end of the middle plate assembly 13 and the end plate 12 (see fig. 2) is increased at least one time. Adopt under the welded mode fixed connection's that the welding is in the same place condition between the tip of well board subassembly 13 and end plate 12, compare in prior art, the welding seam quantity has increased, correspondingly, the welding strength between well board subassembly 13 and end plate 12 has just also improved, avoids causing the problem that the welding seam between well board subassembly 13 and the end plate 12 splits because of electric core inflation in the use of battery module, has improved the life of battery module.

Preferably, the widths of the first middle plate 131 and the second middle plate 132 are the same. More preferably, the first middle plate 131 and the second middle plate 132 have the same structure, that is, the first middle plate 131 and the second middle plate 132 may be used as an upper plate of the middle plate assembly 13 or as a lower plate of the middle plate assembly 13, so as to facilitate production and manufacture and save production cost. The first middle plate 131 and the second middle plate 132 may be manufactured by integral press molding, for example, by integral press molding of aluminum or aluminum alloy.

The end portion 1312 of the first middle plate 131 and the end portion 1322 of the second middle plate 132 each include

straight portions

13122 and 13222 of the ends and

bent portions

13123 and 13223 between the

straight portions

13122 and 13222 and the

bodies

1311 and 1321.

Curved portions

13123 and 13223 offset

straight portions

13122 and 13222 outward by a distance slightly greater than the thickness of

bodies

1311 and 1321; and the lengths of the

bent portions

13123 and 13223 at the downward extending portion 13121 and the upward extending portion 13221 are about half smaller than the lengths of the

bent portions

13123 and 13223 at the other end portions so that the end 1312 of the first middle plate 131 and the end 1322 of the second middle plate 132 may be offset from each other.

In addition, the middle plate assembly 13 further includes an insulating film 133, and the insulating film 133 is hot-pressed and coated on the body 1311 of the first middle plate 131 and the body 1321 of the second middle plate 132. The first middle plate 131 and the second middle plate 132 may be spliced together in advance through the insulating film 133, facilitating the mounting of the subsequent middle plate assembly 13 on the end plate 12. The insulating film 133 may prevent the cell from short-circuiting with the middle plate assembly 13. Meanwhile, the insulating film 133 may also serve as a heat insulation to prevent heat transfer between adjacent electric core groups.

As shown in fig. 2 and 4-6, in order to facilitate the fixed connection of the middle plate assembly 13 and the end plate 12, the end plate 12 is provided with a slot 121, and the end portions of the middle plate assembly 13 (i.e., the end portion 1312 of the first middle plate 131 and the end portion 1322 of the second middle plate 132) are inserted into the slot 121. The shape and size of the insertion groove 121 are substantially the same as those of the end portion of the middle plate assembly 13, so that the middle plate assembly 13 and the end plate 12 can be tightly coupled to facilitate the subsequent welding. Preferably, the slots 121 are through slots to facilitate the welding operation between the middle plate assembly 13 and the end plates 12. I.e. welding can be performed from the outside. In the present embodiment, since the cross section of the end portion of the middle plate assembly 13 is substantially "eight", the cross section of the slot 121 is also substantially "eight" (or isosceles trapezoid), as shown in fig. 6, that is, the slot 121 is gradually narrowed from the inside to the outside. Specifically, the side of the insertion slot 121 close to the electric core is flared, and the end of the centering plate assembly 13 is inserted into the insertion slot 121 to play a role in guiding; the side of the far electric core is a narrow opening, and the opening wall is attached to the end part of the middle plate component 13, so that welding is facilitated.

In the illustrated embodiment, the width of the end of the middle plate assembly 13 is smaller than the width of the main body of the middle plate assembly 13, i.e., the main body and the end of the middle plate assembly 13 form a "convex" structure. This can reduce the length of the insertion groove 121 in the vertical direction in the case where the body of the midplane assembly 13 is substantially flush with the end plate 12, ensuring that the strength of the end plate 12 is not reduced.

The following briefly describes the mounting process of the module frame, first, the first middle plate 131 and the second middle plate 132 are aligned and spliced, then the insulating film 133 is coated on the

bodies

1311 and 1321 of the first middle plate 131 and the second middle plate 132 and is hot-pressed, so that the first middle plate 131 and the second middle plate 132 form the integrated middle plate assembly 13, then, the end of the middle plate assembly 13 is inserted into the insertion grooves 121 of the pair of end plates 12 and is welded, and finally, the pair of side plates 11 and the pair of end plates 12 are welded, so that the mounting is completed.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications of the invention can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. A module frame comprising a pair of side plates disposed in parallel and a pair of end plates disposed in parallel, characterized in that the module frame further comprises at least one middle plate assembly disposed in parallel between a pair of the side plates and comprising a first middle plate and a second middle plate each comprising a main body and end portions at both ends of the main body, wherein the end portions of the first middle plate have downward extending portions and the end portions of the second middle plate have upward extending portions, when the first middle plate and the second middle plate are spliced up and down, the main body of the first middle plate and the main body of the second middle plate are on the same vertical plane while the end portions of the first middle plate and the end portions of the second middle plate are staggered with each other and flush at the edges, and the end portions of the first middle plate and the end portions of the second middle plate are both connected to the end plates.

2. The module frame of claim 1, wherein the end plate defines a slot, and the end of the first middle plate and the end of the second middle plate are inserted into the slot.

3. The module frame of claim 2, wherein the slots are through slots.

4. The module frame of claim 3, wherein the slots taper from inside to outside.

5. The module frame of claim 4, wherein the end portion of the first midplane and the end portion of the second midplane each include a straight portion of a terminus and a curved portion between the straight portion and the body.

6. The module frame of claim 3, wherein ends of the first middle plate and the second middle plate are welded to the end plates.

7. The module frame of claim 2, wherein a width of an end of the midplane assembly is less than a width of a body of the midplane assembly.

8. The module frame of claim 1, wherein the first midplane and the second midplane are the same width.

9. The module frame of claim 1, wherein the midplane assembly further comprises an insulating film thermally press coated over the body of the first midplane and the body of the second midplane.

10. A battery module comprising a module frame and at least two cell groups, wherein the module frame is the module frame according to any one of claims 1 to 9, and the middle plate assembly partitions the adjacent two cell groups.