CN220358286U

CN220358286U - Module pole, battery cover plate and battery

Info

Publication number: CN220358286U
Application number: CN202321996130.6U
Authority: CN
Inventors: 冯玉川; 陈凯; 李峥; 何泓材
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-01-16
Anticipated expiration: 2033-07-27

Abstract

The utility model belongs to the technical field of power batteries, and discloses a module pole, a battery cover plate and a battery. The module post is used for installing on the apron piece, is provided with the mounting hole on the apron piece, and the module post includes rivet, post and connecting plate, is provided with the through hole on the connecting plate, and one side of rivet word connecting plate runs through hole and post and rivets with the post, and the connecting plate is configured as sealing connection in the mounting hole to guaranteed battery cover's intensity, improved the fixed reliability of post, and the module post can be adapted to the battery cover of different specifications, thereby reduced manufacturing cost, improved production efficiency. The battery cover plate comprises a cover plate piece and the module polar post, wherein the cover plate piece is provided with a mounting hole, and the connecting plate is connected to the mounting hole in a sealing way. Through setting up above-mentioned module utmost point post, guaranteed the structural strength of battery apron. The battery comprises a battery shell, an electric core and the battery cover plate, and the structural strength of the battery is improved by applying the battery cover plate.

Description

Module pole, battery cover plate and battery

Technical Field

The utility model relates to the technical field of modules, in particular to a module pole, a battery cover plate and a battery.

Background

The lithium ion battery is widely applied to products such as energy storage base stations, electric automobiles, consumer electronics and the like due to the advantages of high specific energy, long service life, no memory effect, low self-discharge rate, environmental friendliness and the like. The pole is an important component of the battery module, and besides being used for connecting the positive electrode and the negative electrode of the battery cell in the module for conducting electricity, the pole also needs to have corresponding structural strength and sealing requirements so as to meet application requirements.

In the prior art, the posts of lithium ion batteries are typically assembled by injection molding or bolting. The bolt pole is assembled into the pole hole, and then the bolt pole is fixed in the pole hole by processing a threaded hole on the battery cover plate, however, the assembling method has complicated process, and the bolt is repeatedly screwed to easily cause loosening of the pole to influence the sealing effect of the battery; the injection molding pole is connected by arranging the thinning groove at the joint of the cover plate sheet and the pole, so that the connection strength between the pole and the cover plate sheet can be reduced, and the reliability of the injection molding pole is lower.

Therefore, a module pole, a battery cover plate and a battery are needed to solve the above problems.

Disclosure of Invention

The utility model aims to provide a module pole, which can improve the connection strength between the pole and a cover plate sheet, reduce the development period and the cost of battery cover plates with different specifications, reduce the production cost and improve the production efficiency.

The utility model aims to provide a battery cover plate, which can improve the structural strength of the battery cover plate and improve the connection reliability of the pole by applying the module pole.

The utility model aims to provide a battery, and the structural strength of the battery is improved by applying the battery cover plate.

To achieve the purpose, the utility model adopts the following technical scheme:

the module pole is used for being installed on a cover plate sheet, the cover plate sheet is provided with a mounting hole, the module pole comprises a rivet, a pole and a connecting plate, the connecting plate is provided with a through hole, the rivet penetrates through the through hole and the pole from one side of the connecting plate and is riveted with the pole, and the connecting plate is configured to be connected in the mounting hole in a sealing mode.

Preferably, the connecting plate is inserted into the mounting hole, a sinking groove is formed at an edge of the connecting plate, and the cover plate is limited in the sinking groove.

Preferably, the minimum thickness of the connection plate is larger than the thickness of the cover sheet.

Preferably, the module pole further includes an insulating member configured to separate the pole from the connection plate and the rivet from the connection plate.

Preferably, the insulating assembly includes an insulating member provided on one side of the connection plate and interposed between the post and the connection plate, and a sealing member provided on the other side of the connection plate and interposed between the rivet and the connection plate.

Preferably, a first cladding groove is formed at one end of the insulating member facing away from the connecting plate, and the pole is disposed in the first cladding groove.

Preferably, the sealing material is a hot melt adhesive and is filled in the through hole; or (b)

The through hole is a stepped hole, and the seal member is provided in the through hole so as to match the outer shape of the through hole.

The battery cover plate comprises a cover plate piece and any one of the module polar posts, wherein the cover plate piece is provided with a mounting hole, and the connecting plate is connected in the mounting hole in a sealing way.

The battery comprises a battery shell, a battery core and the battery cover plate, wherein the battery shell forms an accommodating space with an opening, the battery core is arranged in the accommodating space, and the battery cover plate seals the opening.

The beneficial effects are that:

according to the module pole, the connecting plate is arranged, the rivet penetrates through the connecting plate and is riveted with the pole, so that the current of the pole piece of the battery core can be led out of the battery, the connecting plate is connected with the cover plate of the battery cover plate, the pole is prevented from being directly riveted on the cover plate, the cover plate is not required to be thinned, the structural strength of the battery cover plate can be ensured, and the reliability of fixing the pole is improved. In addition, the pole is in a modularized structure, so that the development period and the cost of the battery cover plates with different specifications can be reduced to a certain extent, the production cost is reduced, and the production efficiency is improved.

The utility model provides a battery cover plate, which is characterized in that the module pole is arranged, so that the cover plate does not need to be thinned, the structural strength of the battery cover plate can be ensured, and the connection reliability of the pole is ensured.

The utility model provides a battery, which improves the structural strength of the battery by applying the battery cover plate.

Drawings

FIG. 1 is a top view of a battery cover plate provided by the present utility model;

fig. 2 is a schematic longitudinal section of a battery cover plate provided by the utility model;

FIG. 3 is a top view of a modular pole provided by the present utility model

Fig. 4 is a schematic longitudinal section of a modular pole provided by the present utility model.

In the figure:

1. a rivet;

2. a pole;

3. a connecting plate; 31. a through hole; 32. sinking grooves;

4. an insulating member; 41. a first cladding groove;

5. a seal; 51. a second coating groove;

6. a cover sheet; 61. a liquid injection hole; 62. explosion-proof holes; 63. and (5) mounting holes.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a module pole, a battery cover plate and a battery. The battery comprises a battery shell, a battery core and a battery cover plate, wherein the battery shell forms an accommodating space with an opening, the battery core is arranged in the accommodating space, and the battery cover plate is plugged in the opening. Specifically, as shown in fig. 1 and 2, the battery cover plate comprises a cover plate sheet 6 and a pole module, the pole module is mounted on the cover plate sheet 6, a pole piece of the battery core is connected with the pole module, and further, a pole lug of the battery core is connected with the pole module, so that charging and discharging of the battery are realized, and current conduction is realized inside and outside the battery.

In the prior art, the pole of the lithium ion battery is usually assembled by injection molding or bolts. The bolt pole is assembled in the pole hole, then the threaded hole is processed on the battery cover plate, and the bolt pole is fixed in the pole hole, however, the assembly method is complex in process, and the bolt is repeatedly screwed to easily cause loosening of the pole to influence the sealing effect of the battery. The injection molding pole is connected by arranging the thinning groove at the connecting part of the cover plate sheet and the pole, however, the connecting strength between the pole and the cover plate sheet can be reduced, and the reliability of the injection molding pole is lower.

As shown in fig. 1-4, the cover plate 6 is provided with a mounting hole 63, the module pole comprises a rivet 1, a pole 2 and a connecting plate 3, the connecting plate 3 is provided with a through hole 31, the rivet 1 penetrates through the through hole 31 and the pole 2 from one side of the connecting plate 3, the rivet 1 and the pole 2 are riveted, and the connecting plate 3 is connected in the mounting hole 63 of the cover plate 6 in a sealing manner. In the embodiment, the pole 2 is directly fixed on the connecting plate 3 through the rivet 1, and then the connecting plate 3 is fixed on the cover plate piece 6, so that the pole 2 is prevented from being directly riveted on the cover plate piece 6, the cover plate piece 6 is not required to be thinned, and the structural strength of the battery cover plate is further improved.

In this embodiment, the rivet 1 is inverted T-shaped before being installed, and when being installed, the rivet 1 is sequentially inserted into the through hole 31 and the pole 2, and then the end of the rivet 1 is deformed by punching or rolling the rivet 1 by using the heavy head of the press, thereby completing the riveting. The pole 2 is constructed as an annular structure so as to facilitate the penetration of the rivet 1, one side of the pole 2 facing away from the connecting plate is provided with a groove structure, and the rivet 1 is received in the groove structure after being riveted.

In this embodiment, the material of the rivet 1 is stainless steel, and in other embodiments, the rivet 1 may be nickel-plated steel, metallic nickel or other materials, which is not particularly limited in this embodiment.

In the present embodiment, as shown in fig. 1 and 2, two mounting holes 63 are provided on the cover plate sheet 6, and one pole module is mounted at each mounting hole 63. The battery cell comprises a positive plate and a negative plate, wherein one pole column module is connected with the positive plate so as to form a positive pole column of the battery, and the other pole column module is connected with the negative plate so as to form a negative pole column of the battery. Optionally, when the pole 1 is a positive pole, the pole 1 is made of aluminum, and when the pole 1 is a negative pole, the pole 1 is made of copper-aluminum composite material. In a further embodiment, the battery comprises two battery cover plates, each provided with a pole module, in which case the positive and negative lugs of the battery cell are led out from different sides of the battery, respectively.

As shown in fig. 1-4, the connecting plate 3 provided in this embodiment can be inserted into the mounting hole 63, and the edge of the connecting plate 3 is further provided with a sink 32, and the cover plate 6 is limited in the sink 32. The connecting plate 3 is partially inserted into the mounting hole 63 and the cover plate 6 to be matched with the sinking groove 32, so that the pole module is mounted and positioned, the convenience of pole module mounting is improved, and the sealing effect between the connecting plate 3 and the cover plate 6 is improved.

In the embodiment, the connecting plate 3 and the cover plate sheet 6 are fixed by laser welding, so that the connection is firm and the sealing performance is good. In other embodiments, the connecting plate 3 and the cover plate 6 may be fixed by rivets or other fixing methods, and further sealing treatment is required after the fixing, which is not particularly limited in this embodiment.

Preferably, the minimum thickness of the connecting plate 3 provided in the present embodiment is greater than the thickness of the cover plate 6, so as to prevent the connecting plate 3 from being weak due to the fact that the thickness of the cover plate 6 is partially smaller, and further ensure the structural strength of the whole battery cover plate.

As shown in fig. 3 and 4, the module pole provided in this embodiment further includes an insulation component, where the insulation component is disposed between the pole 2 and the connection board 3 and between the rivet 1 and the connection board 3, so as to separate the pole 2 from the connection board 3 and separate the rivet 1 from the connection board 3, thereby ensuring that the pole 1 and the rivet 2 are respectively insulated from the connection board 3 and ensuring that the pole 1 and the rivet 2 are respectively insulated from the cover plate 6.

Preferably, the insulation assembly comprises an insulation 4 and a seal 5, wherein the insulation 4 is arranged outside the connection plate 3 (i.e. on the side of the connection plate 3 facing away from the receiving space) and is sandwiched between the pole 1 and the connection plate 3. The sealing member 5 is disposed on the inner side of the connection plate 3 (i.e., the side of the connection plate 3 facing the accommodating space), and is interposed between the rivet 1 and the connection plate 3. In the embodiment, the insulating component is split into the insulating component 4 and the sealing component 5, and the insulating component and the sealing component are respectively arranged on two sides of the connecting plate 3, so that the insulating effect is ensured, and meanwhile, the installation is convenient.

In this embodiment, the insulating member 4 has a ring-shaped structure, so that the rivet 1 is easily inserted. The seal 5 is also of annular configuration, so as to facilitate the threading of the rivet 1. That is, the rivet 1 is installed by sequentially inserting the sealing member 5, the connection plate 3, the insulating member 4, and the post 2 and then caulking. Therefore, the module polar column is in a modularized structure, and can be adapted to most battery cover plates, so that the development period and the cost of the battery cover plates with different specifications are reduced to a certain extent, the production cost of the battery and the battery cover plates is reduced, and the production efficiency is improved.

Preferably, as shown in fig. 4, one end of the insulating member 4 facing away from the connecting plate 3 (i.e., one side of the insulating member 4 facing the outside of the accommodating space) is provided with a first coating groove 41, and the size of the first coating groove 41 is matched with the shape of the pole 2, and the pole 2 is disposed in the first coating groove 41, i.e., the insulating member 4 realizes coating on the circumferential surface of the pole 2, thereby improving the insulating effect between the pole 2 and the connecting plate 3.

In the present embodiment, the insulator 4 is an insulating rubber. In other embodiments, the insulating member 4 may be made of other materials having insulating properties. Alternatively, the insulator 4 may be an insulating plastic, such as PP, PPS, PE or PC.

As shown in fig. 4, the sealing member 5 provided in this embodiment is at least partially disposed in the through hole 31, so as to effectively separate the pole 2 from the connection plate 3. Preferably, the through hole 31 is a stepped hole, the sealing element 5 is of a stepped annular structure, and the part of the sealing element 5 extending into the through hole 31 is matched with the shape of the through hole 31, so that the sealing element 5 is tightly attached to the inner wall of the through hole 31, and a good sealing effect is ensured. Specifically, the diameter of the rivet 1 is equal to the inner diameter of the sealing element 5, the rivet 1 is arranged in the sealing element 5 in a penetrating manner, the sealing element 5 is of a three-section ladder-shaped structure, the largest ladder surface of the sealing element 5 is in butt joint with the inner side of the connecting plate 3, and the other two steps of the sealing element 5 extend into the through holes 31, so that the sealing effect between the rivet 1 and the connecting plate 3 is guaranteed.

The sealing member 5 that this embodiment provided is provided with second cladding groove 51 towards accommodation space's one side, and the bottom of rivet 1 is pegged graft in second cladding groove 51, and the cell wall in second cladding groove 51 of bottom side butt of rivet 1, even second cladding groove 51 has carried out the cladding to the global of rivet 1 to the insulating effect between sealing member 5 pair utmost point post and the connecting plate has been improved.

In this embodiment, the material of the sealing member 5 is fluororubber, and in other embodiments, the sealing member 5 may be made of a material capable of achieving sealing and insulating effects, such as ethylene propylene diene monomer or PFA, which is not particularly limited in this embodiment.

In another embodiment, the sealing member 5 may be a hot melt adhesive, and the hot melt adhesive is coated on the peripheral surface of the through hole 31, and then the rivet 1 is inserted into the through hole 31, so that the insulation effect and the sealing effect between the rivet 1 and the connecting plate 3 are ensured.

Alternatively, when the sealing member 5 is a hot melt adhesive, the rivet 1 may be riveted and then the hot melt adhesive may be filled in the gap between the through hole 31 and the rivet 1.

Further, the battery cover plate provided by the embodiment further comprises a liquid injection hole 61 and an explosion-proof hole 62, wherein the liquid injection hole 61 and the explosion-proof hole 62 are arranged on the cover plate sheet 6 at intervals, the liquid injection hole is used for injecting electrolyte into the battery shell, and the explosion-proof hole 62 is used for installing an explosion-proof valve.

The shape of the module pole of the present utility model is not limited herein, and may be, for example, square, circular, oval, etc., all within the scope of protection.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The module post is used for being installed on apron piece (6), be provided with mounting hole (63) on apron piece (6), its characterized in that, module post includes rivet (1), post (2) and connecting plate (3), be provided with through-hole (31) on connecting plate (3), rivet (1) certainly one side of connecting plate (3) runs through-hole (31) with post (2), and with post (2) riveting, connecting plate (3) be configured as sealing connection in mounting hole (63).

2. The module pole according to claim 1, characterized in that the connection plate (3) is inserted into the mounting hole (63), the edge of the connection plate (3) is provided with a countersink (32), and the cover plate (6) is limited in the countersink (32).

3. The module pole according to claim 1, characterized in that the minimum thickness of the connection plate (3) is greater than the thickness of the cover plate piece (6).

4. The module pole according to claim 1, characterized in that it further comprises an insulating assembly configured to separate the pole (2) from the connection plate (3), the rivet (1) from the connection plate (3).

5. The module pole according to claim 4, characterized in that the insulation assembly comprises an insulation member (4) and a sealing member (5), the insulation member (4) being arranged on one side of the connection plate (3) and being sandwiched between the pole (2) and the connection plate (3), the sealing member (5) being arranged on the other side of the connection plate (3) and being sandwiched between the rivet (1) and the connection plate (3).

6. The module pole according to claim 5, characterized in that a first cladding groove (41) is provided at an end of the insulating member (4) facing away from the connecting plate (3), the pole (2) being arranged in the first cladding groove (41).

7. The module pole according to claim 5, characterized in that the seal (5) is a hot melt adhesive and fills in the through hole (31); or (b)

The through hole (31) is a stepped hole, and the shape of the sealing piece (5) is matched with the through hole (31) and is arranged in the through hole (31).

8. A module pole according to claim 7, characterized in that the end of the seal (5) facing away from the connection plate (3) is provided with a second cladding groove (51), the end of the rivet (1) being accommodated in the second cladding groove (51).

9. Battery cover plate, characterized by comprising a cover plate piece (6) and the module pole according to any one of claims 1-8, wherein the cover plate piece (6) is provided with a mounting hole (63), and the connecting plate (3) is connected in the mounting hole in a sealing manner.

10. A battery comprising a battery case forming an accommodation space having an opening, a battery cell disposed in the accommodation space, and the battery cover of claim 9, the battery cover sealing the opening.