CN220155693U

CN220155693U - Battery module end plate, battery module and battery pack

Info

Publication number: CN220155693U
Application number: CN202320188184.3U
Authority: CN
Inventors: 卢凯航; 陈朝海; 陈智伟; 李凡; 王鸿鹄; 吴丽华
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-12-08
Anticipated expiration: 2033-02-09

Abstract

The utility model provides a battery module end plate, a battery module and a battery pack, wherein the battery module end plate comprises an end plate body and an output electrode base, and the output electrode base and the end plate body are integrally injection molded; the battery module and the battery pack both comprise the battery module end plate. The end plate body and the output electrode base are integrally formed, so that the number of dies for producing the end plate of the battery module can be reduced, the integration level of the end plate of the battery module is improved, the packaging and transportation cost of the end plate of the battery module is reduced, and the assembly efficiency of the battery module can be improved; meanwhile, due to the integrally formed structural design, the original assembly gap between the end plate body and the output electrode base is eliminated, the risk that electric safety occurs to the conducting pieces around the output electrode base through the gap between the end plate body and the output electrode base is eliminated, and the safety of the battery module is guaranteed.

Description

Battery module end plate, battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module end plate, a battery module and a battery pack.

Background

In the existing battery module, the end plate and the output electrode base are usually of independent assembly structures, so that at least two sets of independent molds are required for production and processing of the end plate and the output electrode base, the production cost is high, and the packaging and transportation cost is high; meanwhile, a gap or a gap is inevitably formed between the two parts after assembly, and certain potential safety hazards can exist in consideration of the high-pressure environment on the output electrode base.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a battery module end plate which is low in processing cost and high in safety.

A second object of the present utility model is to provide a battery module having high assembly efficiency and good working stability.

A third object of the present utility model is to provide a battery pack that is convenient to assemble.

The embodiment of the utility model is realized by the following technical scheme:

a battery module end plate, comprising: an end plate body; and the output electrode base is integrally injection molded with the end plate body.

According to a preferred embodiment, the end plate body is provided with a hot riveting column for hot riveting and fixing the CCS low-pressure plug-in unit.

According to a preferred embodiment, the outer side of the end plate body is provided with a reinforcing zone and a fitting zone, the reinforcing zone being located between two of the fitting zones; a reinforcing structure is arranged in the reinforcing area; the output pole base and the hot riveting column are positioned in at least one assembly area.

According to a preferred embodiment, the end plate body is provided with primary reinforcing ribs.

According to a preferred embodiment, the primary reinforcing ribs are honeycomb-shaped. According to a preferred embodiment, the output pole base comprises a main body integrally injection-molded with the end plate body, and an insert for conducting electricity is arranged on the main body, and the insert and the main body are integrally injection-molded. According to a preferred embodiment, the insert has a cylindrical shape, the peripheral side wall of which is provided with mounting teeth.

According to a preferred embodiment, the battery module end plate further includes a protective cover detachably assembled with the main body; the protective cover includes: a top cover positioned on the upper side of the insert; and the fixed lug is arranged on the top cover and is used for being detachably connected with the main body.

According to a preferred embodiment, the fixing lug is U-shaped, one end of which is connected to the top cover; the top end of the main body is provided with an inserting groove; the U-shaped bending part of the fixing lug is inserted in the inserting groove.

According to a preferred embodiment, the main body is provided with a plurality of lightening holes, the top end of the main body is provided with a plug-in groove, and the plug-in groove is communicated with one lightening hole adjacent to the plug-in groove; the fixing lugs can extend into the lightening holes communicated with the inserting grooves through the inserting grooves.

According to a preferred embodiment, the fixing lug is provided with a clamping protrusion and a limiting protrusion, and the clamping protrusion and the limiting protrusion are arranged on the same side of the fixing lug at intervals; when the fixing lugs are inserted into the inserting grooves, the limiting protrusions are located on the upper side of the top end of the main body, and the clamping protrusions are located in the lightening holes communicated with the inserting grooves and below the inner walls of the upper sides of the lightening holes.

According to a preferred embodiment, the clamping protrusion is provided with a first assembling inclined plane, and the opening of the inserting groove is provided with a second assembling inclined plane which is matched with the first assembling inclined plane.

A battery module comprises the battery module end plate.

A battery pack comprises the battery module.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

the end plate body and the output electrode base are integrally formed, so that the number of dies for producing the end plate of the battery module can be reduced, the integration level of the end plate of the battery module is improved, the packaging and transportation cost of the end plate of the battery module is reduced, and the assembly efficiency of the battery module can be improved; meanwhile, due to the integrally formed structural design, the original assembly gap between the end plate body and the output electrode base is eliminated, the risk that electric safety occurs to the conducting pieces around the output electrode base through the gap between the end plate body and the output electrode base is eliminated, and the safety of the battery module is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of an end plate of a battery module according to an embodiment of the present utility model;

fig. 2 is an exploded view of an end plate of a battery module according to an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of a portion of the structure shown at A in FIG. 2;

fig. 4 is a schematic right-view structural diagram of a battery module end plate according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of section B-B of FIG. 4;

fig. 6 is an enlarged schematic view of a portion of the structure at C in fig. 5.

Icon: 100. an end plate body; 101. a main reinforcing rib; 102. hot riveting columns; 103. auxiliary reinforcing ribs; 200. an output electrode base; 201. an insert; 202. a limit flange; 203. assembling teeth; 204. a lightening hole; 205. a fitting hole; 206. a notch; 207. a plug-in groove; 2071. a second assembly ramp; 300. a protective cover; 301. a top cover; 302. a transversely extending plate; 303. a longitudinally extending plate; 304. a fixed ear; 3041. a clamping protrusion; 3042. a limit protrusion; 3043. a modeling groove; 3044. a first assembly ramp; i, a reinforcing area; II, an assembly area.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are referred to, the positional relationship is based on the positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

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 utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like are described with reference to the angle shown in the drawings, and should not be construed as limiting the specific embodiments. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Referring to fig. 1 to 6, a battery module end plate includes an end plate body 100 and an output electrode base 200, and the end plate body 100 and the output electrode base 200 are integrally injection molded. The integrated structure design can reduce the number of dies for producing the end plate of the battery module, improve the integration level of the end plate of the battery module, reduce the packaging and transportation cost of the end plate of the battery module and improve the assembly efficiency of the battery module; meanwhile, due to the integrally formed structural design, the original assembly gap between the end plate body 100 and the output electrode base 200 is eliminated, the risk that electric safety occurs to the conducting pieces around the output electrode base 200 through the gap between the end plate body 100 and the output electrode base 200 is eliminated, and the safety of the battery module is guaranteed.

In this embodiment, the end plate body 100 is provided with a rivet stem 102 for rivet-fastening CCS low-voltage plug-in. The CCS low-voltage plug-in unit is fixed on the end plate body 100 by hot riveting, so that the risk of insecurity in traditional adhesive fixation can be effectively avoided, and the long-time working stability of the battery module can be ensured.

In this embodiment, the inner side surface of the assembled end plate body 100 is close to the single battery side of the battery module, and the output electrode base 200 is located on the outer side surface of the end plate body 100. Further, as shown in fig. 1 and 2, at least two auxiliary reinforcing ribs 103 are disposed on the outer side surface of the end plate body 100, the two auxiliary reinforcing ribs 103 are disposed in parallel, and the auxiliary reinforcing ribs 103 extend in the up-down direction to divide the outer side surface area of the end plate body 100 into an assembly area ii and a reinforcing area i. Specifically, in this embodiment, the end plate body 100 extends along the left and right directions, two auxiliary reinforcing ribs 103 are disposed at intervals in the left and right directions, the area defined by the two auxiliary reinforcing ribs 103 in the left and right directions on the outer side surface of the end plate body 100 forms the above-mentioned reinforcing area i, the area defined by the left auxiliary reinforcing rib 103 on the outer side surface of the end plate body 100 and the area defined by the right auxiliary reinforcing rib 103 on the left side are both the assembly areas ii, that is, the outer side surface of the end plate body 100 in this embodiment is divided into two assembly areas ii and one reinforcing area i by the two auxiliary reinforcing ribs 103, where the reinforcing area i is located between the two assembly areas ii, and the output electrode base 200 can be selectively disposed in one of the assembly areas ii according to actual needs. In this embodiment, the output pole mount 200 is disposed in the assembly area ii on the right side. In other embodiments, the output electrode base 200 may be disposed in both the assembly regions ii to meet the requirements of the battery modules of different specifications.

In this embodiment, a plurality of rivet studs 102 are disposed in the mounting area II, i.e., CCS low voltage inserts are mounted in the mounting area II. In this embodiment, the rivet stem 102 is disposed in both assembly regions ii. In other embodiments, the rivet stem 102 may be disposed only in one of the mounting areas ii according to actual needs.

In this embodiment, the end plate body 100 is provided with a reinforcing structure. Further, a reinforcing structure is arranged in the reinforcing area I. The reinforcing structure here is a main reinforcing rib 101. That is, the main bead 101 is disposed in the reinforcing region i. Further, the main bead 101 is honeycomb-shaped. The honeycomb structure design of the main bead 101 can improve the structural strength of the end plate body 100. Here, the end plate body 100 and the output electrode base 200 are injection molded from an insulating material such as plastic. The main reinforcing ribs 101 can correspondingly increase the strength of the end plate body 100 made of an insulating material to meet the product assembly requirements.

As shown in fig. 3, the output electrode base 200 includes a main body integrally injection-molded with the end plate body 100, and an insert 201 for conducting electricity is provided on the main body, and the insert 201 and the main body are injection-molded, so that the manufacturing is simple and the structure is compact. Specifically, the main body has a square structure, and a notch 206 is formed at the upper end of the main body for accommodating a conductive copper bar or aluminum bar connected to the insert 201. In use, the copper or aluminum bars extend out of the body along the notch 206 after being connected to the insert 201, i.e., the copper or aluminum bars extend out of the output pole mount 200 along the notch 206.

In this embodiment, the insert 201 has a columnar shape, and the circumferential wall thereof is provided with fitting teeth 203. The coupling strength of the fitting teeth 203 and the inner wall of the fitting hole 205 is higher after the fitting teeth are matched. In the injection molding process, the material of the main body is filled and coated on the surface of the assembly tooth 203, and compared with the assembly mode of directly embedding the insert 201 into the assembly hole 205 shown in fig. 3 and 5, the contact area between the insert 201 and the main body after the integral injection molding is larger, the connection strength is higher, and accordingly, the stability of the battery module during long-time operation is higher. The assembly hole 205 is formed in the injection molding process, and the inner wall of the assembly hole 205 is tightly attached to the outer wall of the insert 201.

In this embodiment, the insert 201 is cylindrical. Further, a limit rib 202 is provided at the upper end of the insert 201. The limiting flange 202 protrudes out of the peripheral side wall of the inner insert 201 in the radial direction of the inner insert 201, so that on one hand, the limiting of the inner insert 201 can be facilitated in the up-down direction, on the other hand, the contact area between the inner insert 201 and a copper bar or an aluminum bar arranged in the notch 206 can be increased, and the stability of conductive connection of the inner insert 201 and the copper bar or the aluminum bar is guaranteed. In this embodiment, the limiting flange 202 and the insert 201 are integrally formed.

Of course, in some embodiments, the assembly holes 205 shown in fig. 3 and 5 may be provided at the bottom of the notch 206, and then the insert 201 may be inserted into the assembly holes 205. The insert 201 is tightly fitted to the fitting hole 205.

In this embodiment, the main body is provided with a plurality of lightening holes 204. The weight reducing holes 204 are used to reduce the material of the main body, and reduce the weight of the main body without affecting the use strength of the main body. The lightening holes 204 are blind holes, which may also be understood as slots, which are formed on the outer side of the main body and extend from the outside to the inside. In this embodiment, the lightening holes 204 are square holes. In other embodiments, the lightening holes 204 may be round holes or holes of other shapes, and the shape is not particularly limited.

As shown in fig. 3 and 6, the battery module end plate further includes a protective cover 300 detachably assembled with the main body; the protective cover 300 comprises a top cover 301 and a fixing lug 304, wherein the top cover 301 is positioned on the upper side of the insert 201; the fixing lug 304 is disposed on the top cover 301 and is detachably connected to the main body. I.e. the top cover 301 is detachably connected to the main body by means of the fixing lugs 304. Specifically, the fixing lug 304 is U-shaped, and one end thereof is connected to the top cover 301; the top end of the main body is provided with a splicing groove 207, and the splicing groove 207 is communicated with one lightening hole 204 adjacent to the splicing groove; the bending part of the U-shaped fixing lug 304 is inserted into the inserting groove 207; the securing lugs 304 can extend through the insertion slot 207 into the lightening holes 204 which communicate with the insertion slot 207. Accordingly, the insertion depth of the fixing lugs 304 can be increased, and the strength of the assembly structure between the protective cover 300 and the main body can be improved. Further, the extending direction of the insertion groove 207 is perpendicular to the extending direction of the lightening hole 204. In this embodiment, as shown in fig. 6, the insertion groove 207 extends from top to bottom. The structure design of extending the insertion groove 207 from top to bottom enables the protection cover 300 to be disassembled and assembled longitudinally, which is beneficial to improving efficiency.

In this embodiment, in order to limit the fixing lug 304, i.e. the protection cover 300, as shown in fig. 6, a clamping protrusion 3041 and a limiting protrusion 3042 are disposed on the fixing lug 304; when the fixing lug 304 is inserted into the insertion groove 207, the limit projection 3042 is positioned at the upper side of the top end of the main body, and the catching projection 3041 is positioned in the weight-reducing hole 204 communicated with the insertion groove 207 and below the upper inner wall of the weight-reducing hole 204. Here, the catching protrusion 3041 and the limiting protrusion 3042 serve to limit the fixing lug 304, i.e., the protective cover 300, in the extending direction of the insertion groove 207. Specifically, the locking protrusion 3041 engages with the top inner wall of the lightening hole 204 to prevent the protection cover 300 from being separated from the insertion groove 207 from bottom to top, and the limiting protrusion 3042 engages with the top outer side of the main body to prevent the protection cover 300 from penetrating deeper into the insertion groove 207 from top to bottom.

In this embodiment, the fixing lug 304 and the top cover 301 are integrally formed and made of insulating material. The fixing lug 304 is designed in a U-shaped structure, so that the fixing lug has certain elastic deformation capability. In use, a user holds the securing tab 304 and applies a force to it to narrow its overall width to facilitate its insertion fit into the insertion slot 207.

In this embodiment, the locking protrusion 3041 and the limiting protrusion 3042 are disposed at the same side of the fixing lug 304 at intervals.

In this embodiment, a molding groove 3043 is provided on the limiting projection 3042. The molding groove 3043 can improve the friction force of the limiting protrusion 3042, and is convenient for a user to hold the limiting protrusion 3042.

Further, a first fitting inclined surface 3044 is provided on the catching convex 3041, and a second fitting inclined surface 2071 which is fit with the first fitting inclined surface 3044 is provided at the opening of the insertion groove 207. The first fitting inclined surface 3044 and the second fitting inclined surface 2071 facilitate smooth fitting of the fixing lug 304 into the insertion groove 207, and reduce the fitting resistance.

The protection cover 300 is detachable in the longitudinal direction (up and down direction), and has a small possibility of interference with other components of the battery module, thereby being convenient to use.

As shown in fig. 3, in this embodiment, the top cover 301 is further provided with a laterally extending plate 302 and a longitudinally extending plate 303. The transverse extension plate 302 and the longitudinal extension plate 303 can expand the coverage of the top cover 301, and improve the safety protection capability of the top cover 301.

The embodiment also provides a battery module, which comprises the battery module end plate. The assembly efficiency is high, and the working stability is good.

The embodiment also provides a battery pack, which comprises the battery module. And the assembly is convenient.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A battery module end plate, comprising:

an end plate body (100); and

an output electrode base (200), wherein the output electrode base (200) and the end plate body (100) are integrally injection molded;

and a hot riveting column (102) is arranged on the end plate body (100) and is used for hot riveting and fixing the CCS low-voltage plug-in unit.

2. The battery module end plate according to claim 1, wherein the outer side surface of the end plate body (100) is provided with a reinforcing region (i) and an assembly region (ii), the reinforcing region (i) being located between the two assembly regions (ii);

a reinforcing structure is arranged in the reinforcing area (I);

the output pole mount (200) and the rivet stem (102) are located in at least one assembly region (II).

3. The battery module end plate according to claim 2, wherein the reinforcing structure is a main reinforcing rib (101).

4. A battery module end plate according to claim 3, characterized in that the main reinforcing ribs (101) are honeycomb-shaped.

5. The battery module end plate according to claim 1, wherein the output terminal base (200) includes a body integrally injection-molded with the end plate body (100), on which an insert (201) for electrical conduction is provided, the insert (201) being injection-molded with the body.

6. The battery module end plate according to claim 5, wherein the insert (201) has a columnar shape, and fitting teeth (203) are provided on a peripheral side wall thereof.

7. The battery module end plate according to claim 5, further comprising a protective cover (300) detachably assembled with the main body;

the protective cover (300) includes:

a top cover (301) on the upper side of the insert (201);

and the fixing lug (304) is arranged on the top cover (301) and is used for being detachably connected with the main body.

8. The battery module end plate according to claim 7, wherein the fixing lug (304) is U-shaped, one end of which is connected to the top cover (301); the top end of the main body is provided with a plug-in groove (207);

the U-shaped bending part of the fixing lug (304) is inserted into the inserting groove (207).

9. The battery module end plate according to claim 7, wherein a plurality of lightening holes (204) are provided in the main body, a plug groove (207) is provided at the top end of the main body, and the plug groove (207) is communicated with one lightening hole (204) adjacent thereto;

the fixing lug (304) can extend into the lightening hole (204) which is in communication with the insertion groove (207) through the insertion groove (207).

10. The battery module end plate according to claim 9, wherein a clamping protrusion (3041) and a limiting protrusion (3042) are provided on the fixing lug (304), and the clamping protrusion (3041) and the limiting protrusion (3042) are provided at an interval on the same side of the fixing lug (304); when the fixing lug (304) is inserted into the insertion groove (207), the limit protrusion (3042) is positioned on the upper side of the top end of the main body, and the clamping protrusion (3041) is positioned in the weight-reducing hole (204) communicated with the insertion groove (207) and below the inner wall of the upper side of the weight-reducing hole (204).

11. The battery module end plate according to claim 10, wherein a first fitting inclined surface (3044) is provided on the click-on protrusion (3041), and a second fitting inclined surface (2071) that is fitted to the first fitting inclined surface (3044) is provided at an opening of the insertion groove (207).

12. A battery module comprising the battery module end plate according to any one of claims 1 to 11.

13. A battery pack comprising the battery module according to claim 12.