CN218005145U

CN218005145U - Fixing structure and battery module

Info

Publication number: CN218005145U
Application number: CN202221816498.5U
Authority: CN
Inventors: 王鹏飞
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-12-09
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to a fixed knot constructs and battery module. The fixing structure comprises a fixing support, the fixing support comprises an inserting part and a fixing part which are connected with each other, and the fixing part is used for being connected with the output electrode; the elastic part is sleeved on the inserting part along the circumferential direction of the inserting part, a first mounting hole is formed in the end plate, the inserting part is inserted into the first mounting hole, and the outer surface of the elastic part is abutted to the side wall of the first mounting hole. Only need be connected fixed part and output pole, the fixed of output pole just can be accomplished with the end plate grafting to grafting of grafting portion, easy operation, the installation effectiveness is high. And the fixed support and the end plate are detachably connected through the elastic part, so that the fixed support is convenient to detach and replace, when the fixed structure is maintained, only the fixed support needs to be replaced without detaching the end plate, and the updating and maintaining cost of the fixed structure is saved.

Description

Fixing structure and battery module

Technical Field

The utility model relates to a battery module technical field especially relates to fixed knot constructs and battery module.

Background

The lithium ion battery is a novel secondary battery, has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. In order to meet the power requirement of the equipment, generally, a plurality of lithium ion battery cells are connected in series to form a battery module. The utmost point ear of a plurality of electric cores passes through the busbar and connects in series and is connected with the output pole of battery module, and the battery module realizes supplying power to external equipment through output pole and outside copper bar electricity even connection.

Output utmost point and outside copper bar need effectively be fixed on battery module's casing, avoid taking place the circumstances such as aversion, dislocation or deformation, and then lead to the electric connection effect not good, influence effective use of battery module, increase maintenance, cost of maintenance, influence the life of battery module even. However, the existing fixing mode has high processing and assembling cost.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a fixing structure and a battery module for the fixing problem of the output electrode and the external copper bars.

A fixing structure is used for fixing an output electrode on an end plate and comprises a fixing support, wherein the fixing support comprises an inserting part and a fixing part which are connected with each other, and the fixing part is used for being connected with the output electrode; the elastic part is sleeved on the inserting part along the circumferential direction of the inserting part, the end plate is provided with a first mounting hole, the inserting part is inserted into the first mounting hole, and the outer surface of the elastic part is abutted to the side wall of the first mounting hole.

Foretell fixed knot constructs, fixes the output pole on the end plate through fixing support, and the output pole of being convenient for is conductively connected with outside copper bar, improves electrically conductive connection effect, guarantees validity and the stability of battery module to the external equipment power supply. Because the elastic part is arranged on the insertion part, when the outer surface of the elastic part is abutted against the side wall of the first mounting hole, the friction force between the insertion part and the first mounting hole is large, and the insertion part is fixed on the end plate through the friction force. Therefore, the fixing of the output electrode can be completed only by connecting the fixing part with the output electrode and inserting the inserting part with the end plate, and the device is simple to operate and high in installation efficiency. And the fixed support and the end plate are detachably connected through the elastic part, so that the fixed support is convenient to detach and replace, when the fixed structure is maintained, only the fixed support needs to be replaced without detaching the end plate, and the updating and maintaining cost of the fixed structure is saved.

In one embodiment, a limiting member is disposed on an inner surface of the elastic portion, a limiting hole is disposed on the insertion portion, and the limiting member is inserted into the limiting hole to limit movement of the elastic portion relative to the insertion portion.

In one embodiment, the insertion part is provided with a first groove, the first groove is arranged along the circumferential direction of the insertion part, the limiting hole is arranged on the bottom wall of the first groove, and the elastic part is sleeved on the first groove.

In one embodiment, the shape of the insertion part is adapted to the shape of the first mounting hole, and the elastic part is in interference fit with the first mounting hole.

In one embodiment, a side wall of the first mounting hole is provided with a second groove for accommodating a part of the elastic part.

In one embodiment, the first mounting hole is a square hole, the four side walls of the first mounting hole are respectively provided with the second grooves, and the four second grooves are used for accommodating the part of the elastic part.

In one embodiment, the fixing structure further comprises a fixing part, a second mounting hole is formed in the fixing part, and the fixing part penetrates through the output electrode and the external copper bar, is inserted into the second mounting hole, and is connected with the fixing part.

In one embodiment, the fixing structure further includes a protective cover, the protective cover is used for covering the output electrode and the portion, connected with the fixing portion, of the external copper bar, and the protective cover is connected with the fixing support.

In one embodiment, the fixed support is an insulating support.

The utility model provides a battery module, includes a plurality of electric cores, busbar, output pole, end plate and fixed knot construct, it is a plurality of the utmost point ear of electric core respectively with the busbar is connected, the busbar with the one end electricity of output pole is connected, the other end of output pole is used for being connected with outside copper bar electricity, fixed knot construct the fixed part with the output pole is connected, be equipped with first mounting hole on the end plate, fixed knot construct the grafting portion insert in the first mounting hole.

Foretell battery module fixes the output pole on the end plate through fixing support, and the output pole of being convenient for is conductively connected with outside copper bar, improves electrically conductive connection effect, guarantees validity and the stability of battery module to the external equipment power supply. Because the elastic part is arranged on the insertion part, when the outer surface of the elastic part is abutted against the inner side wall of the first mounting hole, the friction force between the insertion part and the first mounting hole is large, and the insertion part is fixed on the end plate through the friction force. Therefore, only the fixing part is connected with the output pole, the inserting part is inserted into the end plate to fix the output pole, and the operation is simple and the installation efficiency is high. And the fixed support and the end plate are detachably connected through the elastic part, so that the fixed support is convenient to detach and replace, when the fixed structure is maintained, only the fixed support needs to be replaced without detaching the end plate, and the updating and maintaining cost of the fixed structure is saved.

Drawings

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

FIG. 2 is a schematic structural view of a fixing structure according to an embodiment;

FIG. 3 is a schematic diagram of an end plate according to an embodiment;

FIG. 4 is a schematic diagram of an embodiment of a mounting bracket;

fig. 5 is a schematic structural diagram of an elastic portion according to an embodiment.

Reference numerals: 100. a battery module; 10. a bus bar; 20. an output electrode; 30. a fixed support; 31. a plug-in part; 32. a fixed part; 321. a first groove; 322. a limiting hole; 33. an elastic part; 331. a limiting member; 34. a second mounting hole; 35. a clamping part; 40. an end plate; 41. a first mounting hole; 42. a second groove; 50. a side plate; 60. an electric core; 70. and (7) a cover plate.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The fixing structure and the battery module 100 in some embodiments will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-5, in one embodiment, a fixation structure is provided that includes a fixation support 30.

Wherein, the fixing support 30 comprises an inserting part 31 and a fixing part 32 which are connected with each other, and the fixing part 32 is used for connecting with the output pole 20; the elastic part 33 is sleeved on the insertion part 31 along the circumferential direction thereof, the end plate 40 is provided with a first mounting hole 41, the insertion part 31 is inserted into the first mounting hole 41, and the outer surface of the elastic part 33 is abutted against the side wall of the first mounting hole 41.

The fixing structure fixes the output electrode 20 on the end plate 40 through the fixing support 30, so that the output electrode 20 is conveniently in conductive connection with an external copper bar, the conductive connection effect is improved, and the effectiveness and the stability of power supply of the battery module 100 to external equipment are ensured. Since the elastic portion 33 is provided on the socket portion 31, when the outer surface of the elastic portion 33 abuts against the inner sidewall of the first mounting hole 41, the frictional force between the socket portion 31 and the first mounting hole 41 is large, and the socket portion 31 is fixed to the end plate 40 by the frictional force. Therefore, the fixing of the output electrode 20 can be completed only by connecting the fixing portion 32 to the output electrode 20 and inserting the insertion portion 31 into the end plate 40, and the operation is simple and the mounting efficiency is high. And the fixed support 30 and the end plate 40 are detachably connected through the elastic part 33, so that the fixed support 30 is convenient to detach and replace, when the fixed structure is maintained, only the fixed support 30 needs to be replaced without detaching the end plate 40, and the updating and maintenance cost of the fixed structure is saved.

Specifically, as shown in fig. 2, 4 and 5, in an embodiment, the inner surface of the elastic portion 33 is provided with a limiting member 331, the insertion portion 31 is provided with a limiting hole 322, and the limiting member 331 is inserted into the limiting hole 322 for limiting the movement of the elastic portion 33 relative to the insertion portion 31.

In this embodiment, the limiting hole 322 is disposed along a direction perpendicular to the axial direction of the insertion portion 31, the shape of the limiting member 331 is adapted to the shape of the limiting hole 322, the limiting hole 322 penetrates through the insertion portion 31, one end of the limiting member 331 is connected to the first inner wall of the elastic portion 33, the other end of the limiting member 331 penetrates through the limiting hole 322 to be connected to the second inner wall of the elastic portion 33, and the first inner wall and the second inner wall are disposed opposite to each other. Therefore, the stopper 331 and the stopper hole 322 can restrict the movement of the elastic portion 33 relative to the insertion portion 31 in the axial direction of the insertion portion 31, and ensure that the fixing holder 30 can be fixed to the end plate 40 through the elastic portion 33.

The elastic portion 33 and the limiting member 331 are integrally injection molded on the insertion portion 31.

Specifically, as shown in fig. 2, fig. 4 and fig. 5, in an embodiment, the insertion part 31 is provided with a first groove 321, the first groove 321 is disposed along a circumferential direction of the insertion part 31, the limiting hole 322 is disposed on a bottom wall of the first groove 321, and the elastic part 33 is sleeved on the first groove 321. That is, the inner surface of the elastic portion 33 abuts against the bottom wall of the first groove 321, the side wall of the first groove 321 provided along the circumferential direction of the socket 31 abuts against the end surface of the elastic portion 33, and further, the elastic portion 33 is restricted from moving relative to the socket 31 in the axial direction of the socket 31, so that the reliability of the fixed connection between the elastic portion 33 and the socket 31 is improved, and the reliability of the connection between the fixed holder 30 and the end plate 40 is improved.

Specifically, as shown in fig. 2 and 3, in one embodiment, the shape of the insertion part 31 is adapted to the shape of the first mounting hole 41, and the elastic part 33 is in interference fit with the first mounting hole 41.

In this embodiment, the first mounting hole 41 is a square mounting hole, the inserting portion 31 is a rectangular inserting portion 31, and an end surface of the inserting portion 31 facing the first mounting hole 41 is provided with a chamfer to facilitate the insertion of the inserting portion 31 into the first mounting hole 41.

Moreover, the length of the section of the elastic part 33 perpendicular to the axial direction of the plug part 31 is slightly greater than the length of the first mounting hole 41, and the width of the section of the elastic part 33 perpendicular to the axial direction of the plug part 31 is slightly greater than the width of the first mounting hole 41, so that the elastic part 33 is in interference fit with the first mounting hole 41, the friction force between the elastic part 33 and the end plate 40 is increased, and the reliability of connection between the plug part 31 and the end plate 40 is improved.

Specifically, as shown in fig. 2 and 3, in one embodiment, a second groove 42 is provided on a sidewall of the first mounting hole 41, and the second groove 42 is used for accommodating a part of the elastic portion 33.

The difference between the length of the section perpendicular to the axial direction of the inserting part 31 on the elastic part 33 and the length of the first mounting hole 41 is 0.2 mm-0.3 mm, and the difference between the width of the section perpendicular to the axial direction of the inserting part 31 on the elastic part 33 and the width of the first mounting hole 41 is 0.2 mm-0.3 mm. When the plug 31 is inserted into the first mounting hole 41, the elastic portion 33 enters the second groove 42 after the elastic portion 33 is pressed and deformed because the length and width of the elastic portion 33 are slightly larger than those of the first mounting hole 41. Therefore, the second groove 42 is advantageous to improve the adaptability of the first mounting hole 41 to the length and width of the elastic portion 33 and to improve the frictional force between the side wall of the first mounting hole 41 and the elastic portion 33.

Specifically, as shown in fig. 2 and 3, in one embodiment, the first mounting hole 41 is a square hole, and the four side walls of the first mounting hole 41 are respectively provided with the second grooves 42, and the four second grooves 42 are used for accommodating the portions of the elastic parts 33. That is, the number of the second grooves 42 is four, and the four second grooves 42 correspond to the four side walls of the first mounting hole 41 one by one.

Specifically, as shown in fig. 2, in an embodiment, the fixing structure further includes a fixing member, a second mounting hole 34 is formed on the fixing portion 32, and the fixing member passes through the output electrode 20, and the external copper bar is inserted into the second mounting hole 34 and connected to the fixing portion 32. The fixing piece is used for fixing the output pole 20 and the external copper bar on the fixing support 30, and the output pole 20 is in conductive connection with the external copper bar, so that the fixing reliability of the output pole 20 is improved, and the effectiveness and the stability of power supply of the battery module 100 to external equipment are guaranteed.

In this embodiment, the fixing member includes a bolt or a screw, the second mounting hole 34 is a threaded hole, and the bolt or the screw can penetrate through the output pole 20 and the external copper bar to be in threaded connection with the second mounting hole 34. The mounting can dismantle output pole 20, outside copper bar and fixing support 30 and be connected, and the installation of being convenient for or dismantle outside copper bar also are favorable to changing fixing support 30.

Specifically, as shown in fig. 2 and 4, in an embodiment, the fixing structure further includes a protective cover for covering the output electrode 20 and the portion of the external copper bar connected to the fixing portion 32, and the protective cover is connected to the fixing support 30. The visor is used for keeping apart output pole 20 and outside copper bar with the outside, prevents that output pole 20 and outside copper bar from receiving outside striking or scraping.

Wherein, be equipped with joint portion 35 on the lateral wall of fixed part 32, be equipped with buckling parts on the visor, fixed part 32 and visor pass through joint portion 35 and buckling parts cooperation joint.

Specifically, in one embodiment, the fixed mount 30 is an insulating mount. Since the end plate 40 is a metal profile, the insulating fixing support 30 can effectively isolate the end plate 40 from the output electrode 20, and prevent the end plate 40 from being electrified to cause electric leakage or short circuit of the battery module 100.

As shown in fig. 1, in an embodiment, a battery module 100 is provided, which includes a plurality of battery cells 60, a bus bar 10, an output electrode 20, an end plate 40, and a fixing structure, wherein tabs of the battery cells 60 are respectively connected to the bus bar 10, the bus bar 10 is electrically connected to one end of the output electrode 20, the other end of the output electrode 20 is used for electrically connecting to an external copper bar, a fixing portion 32 of the fixing structure is connected to the output electrode 20, the end plate 40 is provided with a first mounting hole 41, and an insertion portion 31 of the fixing structure is inserted into the first mounting hole 41.

The output electrode 20 is fixed on the end plate 40 through the fixing support 30, so that the output electrode 20 is in conductive connection with an external copper bar, the conductive connection effect is improved, and the effectiveness and the stability of power supply of the battery module 100 to external equipment are guaranteed. Since the elastic portion 33 is provided on the socket portion 31, when the outer surface of the elastic portion 33 abuts against the inner sidewall of the first mounting hole 41, the frictional force between the socket portion 31 and the first mounting hole 41 is large, and the socket portion 31 is fixed to the end plate 40 by the frictional force. Therefore, the fixing of the output electrode 20 can be completed only by connecting the fixing portion 32 to the output electrode 20 and inserting the insertion portion 31 into the end plate 40, and the operation is simple and the mounting efficiency is high. And the fixed support 30 and the end plate 40 are detachably connected through the elastic part 33, so that the fixed support 30 is convenient to detach and replace, when the fixed structure is maintained, only the fixed support 30 needs to be replaced without detaching the end plate 40, and the updating and maintenance cost of the fixed structure is saved.

In this embodiment, the battery module 100 includes two side plates 50, two end plates 40, a cover plate 70 and a bottom plate, where the two side plates 50, the two end plates 40, the bottom plate and the cover plate 70 enclose a module housing for accommodating the battery core 60, the two end plates 40 are disposed oppositely, the two side plates 50 are disposed oppositely, and the bottom plate and the cover are disposed oppositely. The battery module 100 further comprises two fixed supports 30, a positive output pole 20 and a negative output pole 20, the positive output pole 20 is connected with one of the fixed supports 30, the negative output pole 20 is connected with the other fixed support 30, first mounting holes 41 are respectively formed in the two end plates 40, and the fixed supports 30 correspond to the end plates 40 one to one.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A fixing structure is used for fixing an output electrode on an end plate and is characterized by comprising a fixing support, wherein the fixing support comprises an inserting part and a fixing part which are connected with each other, and the fixing part is used for being connected with the output electrode; the elastic part is sleeved on the inserting part along the circumferential direction of the inserting part, a first mounting hole is formed in the end plate, the inserting part is inserted into the first mounting hole, and the outer surface of the elastic part is abutted to the side wall of the first mounting hole.

2. The fixing structure according to claim 1, wherein a limiting member is provided on an inner surface of the elastic portion, and a limiting hole is provided on the insertion portion, and the limiting member is inserted into the limiting hole to limit movement of the elastic portion relative to the insertion portion.

3. The fixing structure according to claim 2, wherein a first groove is formed in the insertion portion, the first groove is formed along a circumferential direction of the insertion portion, the limiting hole is formed in a bottom wall of the first groove, and the elastic portion is sleeved on the first groove.

4. The fixing structure according to claim 1, wherein the shape of the insertion portion is adapted to the shape of the first mounting hole, and the elastic portion is in interference fit with the first mounting hole.

5. The fixing structure according to claim 4, wherein a second recess is provided on a side wall of the first mounting hole, the second recess receiving a portion of the elastic portion.

6. The fixing structure according to claim 5, wherein the first mounting hole is a square hole, and the second grooves are respectively provided on four side walls of the first mounting hole, and four of the second grooves are used for accommodating portions of the elastic portion.

7. The fixing structure of claim 1, further comprising a fixing member, wherein a second mounting hole is formed on the fixing portion, and the fixing member passes through the output electrode, is inserted into the second mounting hole through the external copper bar, and is connected to the fixing portion.

8. The fixing structure according to claim 7, further comprising a protective cover for covering the output pole and the portion of the external copper bar connected to the fixing portion, the protective cover being connected to the fixing support.

9. The fixing structure according to any one of claims 1 to 8, wherein the fixing support is an insulating support.

10. A battery module is characterized by comprising a plurality of battery cores, a busbar, an output electrode, an end plate and the fixing structure of any one of claims 1 to 9, wherein the tabs of the battery cores are respectively connected with the busbar, the busbar is electrically connected with one end of the output electrode, the other end of the output electrode is used for being electrically connected with an external copper bar, the fixing part of the fixing structure is connected with the output electrode, a first mounting hole is formed in the end plate, and the insertion part of the fixing structure is inserted into the first mounting hole.