CN218569099U

CN218569099U - Battery cell and battery pack

Info

Publication number: CN218569099U
Application number: CN202223114859.4U
Authority: CN
Inventors: 李少凡; 钟文彬; 赵志峰; 王士君; 郭永兴
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-03
Anticipated expiration: 2032-11-23

Abstract

The utility model provides an electric core, which comprises a cover plate, wherein the cover plate comprises a base plate, a stop frame, a pole and upper plastic cement, and the number of the cover plate is two, namely an anode cover plate and a cathode cover plate; the shell is arranged between the positive electrode cover plate and the negative electrode cover plate; the pole column is provided with a first groove wound around the outer wall, the pole column sequentially penetrates through the stopping frame and the substrate, the upper plastic is in a frame shape, the inner wall of the upper plastic is provided with a first protrusion, and the first protrusion is matched with the first groove, so that the pole column, the stopping frame and the substrate are relatively fixed. The utility model provides a short knife battery, positive pole cover plate and negative pole cover plate separately set up in the both sides of casing, set up first recess on the utmost point post, run through locking frame, base plate back through utmost point post and go up the plastic cooperation for utmost point post, locking frame, base plate are fixed, simplify manufacturing procedure, improve production machining efficiency, are favorable to realizing automated processing.

Description

Battery cell and battery pack

Technical Field

The utility model relates to an electricity core field, concretely relates to electricity core and battery package.

Background

Along with the increasing popularization of new energy automobiles, the demand of the market on lithium batteries is increasing day by day, the endurance of the new energy automobiles is a bottleneck restricting the development of the industry, the high endurance means the demand of high energy density, the innovation of a chemical system in a battery cell is difficult and slow at present, most battery cell factories and host factories advocate continuous optimization of the structure to achieve the purpose of improving the energy density of the system, especially, the CTP technology and the blade battery cell technology are most prominent in recent years, the blade batteries are easy to group, the grouping efficiency is effectively improved, and the method is an effective way for improving the energy density of the system.

At present, the mainstream blade battery in production on the market comprises a conventional-size battery and a short-blade battery, and the length of the short-blade battery is less than 600mm, so that the system electric quantity requirements of various finished vehicles can be easily matched. However, most of the existing battery cell structures are in a riveting type, most suppliers of riveting processes have liquid leakage risks, the cover plate manufacturing process in a workshop is high in noise and pollutes the environment, and most of the existing battery cell plants adopt the riveting type battery cell structures, so that the cost is low, but parts are numerous, the processes are numerous, and most of the cover plate plants are in workshop type.

SUMMERY OF THE UTILITY MODEL

In view of the shortcoming of the prior art above, the utility model provides an electricity core to improve the technical problem that current riveting formula electricity core structure spare part is numerous, the process is complicated, be unfavorable for large-scale production.

In order to achieve the above objects and other related objects, the present invention provides an electrical core. The battery cover plate comprises a cover plate, wherein the cover plate comprises a base plate, a stop frame, a pole and upper plastic, and two cover plates are respectively a positive cover plate and a negative cover plate; a case disposed between the positive electrode cover plate and the negative electrode cover plate; the pole column is provided with a first groove around the outer wall, the pole column sequentially penetrates through the stopping frame and the substrate, the upper plastic is frame-shaped, the inner wall of the upper plastic is provided with a first protrusion, and the first protrusion is matched with the first groove, so that the pole column, the stopping frame and the substrate are relatively fixed.

In an exemplary embodiment of the present application, the post is sleeved with a sealing ring, and the sealing ring is disposed between the stopper frame and the substrate.

In this application an exemplary embodiment, be provided with the second through-hole on the stopping frame, utmost point post runs through the second through-hole is in order to run through the stopping frame, one side that the second through-hole is close to the base plate is equipped with the fourth recess, the partial embedding of sealing washer fourth recess.

In an exemplary embodiment of the present application, a second groove is disposed on a side of the stopping frame away from the substrate, and the bottom plate of the terminal is inserted into the second groove.

In an exemplary embodiment of the present application, the cross section of the pole post is rectangular, and the upper plastic is a frame shape having a rectangular cross section.

In an exemplary embodiment of the present application, a first through hole is formed in the substrate, the pole penetrates through the substrate from the first through hole, a third groove is formed in the top of the first through hole, and the upper plastic is embedded into the third groove.

In an exemplary embodiment of the present application, the upper plastic part is embedded in the first through hole.

In an exemplary embodiment of the present application, the pole is a composite pole, the pole includes a first material body and a second material body, a mounting groove is preset on the second material body, and the first material body is inserted into the mounting groove and fixed relative to the second material body.

In an exemplary embodiment of the present application, the upper plastic of the positive electrode cover plate is a conductive upper plastic.

The application also claims a battery pack, wherein the battery pack is provided with the battery core.

Combine prior art, the beneficial effects of the utility model reside in that:

the existing riveting type short-knife battery has numerous parts and complex working procedures, and most of the existing riveting type short-knife battery is processed in a workshop manner. The utility model provides a short knife battery, positive pole cover plate and negative pole cover plate separately set up in the both sides of casing, set up first recess on the utmost point post, run through locking frame, base plate back through utmost point post and go up the plastic cooperation for utmost point post, locking frame, base plate are fixed, simplify manufacturing procedure, improve production machining efficiency, are favorable to realizing automated processing.

The last plastic of this application can be through to the formation of moulding plastics on the apron, goes up the plastic and laminates more with utmost point post, reduces the risk of weeping, and production efficiency is high, reduces the production of noise in the manufacturing process, is favorable to automated production, improves production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of an exemplary cell structure according to the present application;

FIG. 2 is a schematic view of an exemplary positive cover plate of the present application;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2 of the present application;

FIG. 4 is an exploded view of an exemplary positive cover plate of the present application;

FIG. 5 is a schematic view of an exemplary negative cap plate of the present application;

fig. 6 is an exploded view of an exemplary negative cover plate of the present application.

Description of the element reference

100. A cover plate; 110. a positive electrode cover plate; 120. a negative electrode cover plate; 130. a substrate; 131. a third groove; 140. a stopper frame; 141. a second groove; 150. a pole column; 151. a first groove; 160. plastic is coated; 161. a first protrusion; 170. a seal ring; 200. a housing.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the present invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not noted in the following examples are generally performed under conventional conditions or conditions recommended by each manufacturer.

When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any number between the endpoints are optional unless the utility model discloses otherwise. 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 invention belongs and are intended to describe the same, and all methods, apparatus and materials similar or equivalent to those described herein may be used in the practice of this invention.

It should be understood that the terms "upper", "lower", "left", "right", "middle" and "one" used herein are used for descriptive purposes only and are not intended to limit the scope of the present invention, and that changes and modifications in the relative relationship may be made without substantial technical changes and modifications.

In order to solve the above problems, the present application provides a battery cell, please refer to fig. 1, the battery cell includes two cover plates 100 and a casing 200, the two cover plates 100 are a positive cover plate 110 and a negative cover plate 120, respectively, and the casing 200 is disposed between the positive cover plate 110 and the negative cover plate 120.

In an embodiment, the post 150 is provided with a first groove 151 surrounding an outer wall, the substrate 130 is provided with a first through hole, the stopping frame 140 is provided with a second through hole, the post 150 sequentially penetrates through the stopping frame 140 and the substrate 130 through the second through hole and the first through hole, the upper plastic 160 is in a frame shape, the inner wall of the upper plastic 160 is provided with a first protrusion 161, and the first protrusion 161 is matched with the first groove 151, so that the post 150, the stopping frame 140 and the substrate 130 are relatively fixed. In one embodiment, the upper plastic 160 is formed by injection molding and tightly fits the first groove 151, so as to ensure the fixing among the post 150, the stopper 140, and the substrate 130. The upper plastic 160 is formed by injection molding, and a gap where the pole 150 penetrates through the substrate 130 can be filled, so that the risk of liquid leakage is reduced. In one embodiment, conductive carbon black is added to the upper plastic 160 of the positive electrode lid 110 to form the weak conductive upper plastic 160.

In order to further improve the sealing performance and prevent leakage, in one embodiment, a sealing ring 170 is sleeved on the pole 150, and the sealing ring 170 is disposed between the stopper frame 140 and the base plate 130. By additionally arranging the sealing ring 170, the sealing performance can be effectively improved. Go up plastic 160 through moulding plastics when embedding first recess 151, can produce the locking die power, compress sealing washer 170, further fill the gap, effectively improve sealing performance of sealing washer 170.

In an embodiment, a fourth groove is formed in one side, close to the substrate 130, of the second through hole, the sealing ring 170 is partially embedded into the fourth groove, the sealing ring 170 is embedded into the fourth groove, the sealing ring 170 can be positioned and fixed, dislocation of the sealing ring 170 is avoided, and the sealing ring 170 can be compressed conveniently when the upper plastic 160 is molded, so that the sealing ring 170 is tightly combined with the edge of the fourth groove, and a sealing effect is guaranteed.

The conventional pole 150 is generally cylindrical and is easy to rotate during installation and use, and in an embodiment of the present application, the cross section of the pole 150 is rectangular, and the upper plastic 160 is a frame with a rectangular cross section. The square pole 150 has a better rotation stopping effect, can save some rotation stopping structures on a battery cell framework, reduces processing steps, and the square pole 150 can increase the flow area of the pole 150 and improve the flow performance. It should be noted that, in other embodiments of the present application, the cross section of the post 150 may be a trapezoid, a rhombus, a triangle, or the like, having an inner angle, so as to improve the rotation stopping effect of the post 150, and in other embodiments, a rotation stopping protrusion structure or the like may be added on the sidewall of the post 150, so as to prevent the post 150, the stopping frame 140, and the substrate 130 from rotating.

Further, in order to facilitate assembly and ensure accurate positioning of the terminal 150, in an embodiment of the present application, a second groove 141 is disposed on a side of the stopping frame 140 away from the substrate 130, and a bottom plate of the terminal 150 is inserted into the second groove 141. Preferably, the second groove 141 has a rectangular cross section, the pole 150 also has a rectangular cross section, and the bottom plate of the pole 150 is connected to the second groove 141 by insertion and removal, so that the pole 150 can be conveniently positioned during installation. The bottom plate of the square pole 150 is inserted into the second groove 141, and can also play a role in stopping rotation.

Further, for assembly convenience, in an embodiment, a third groove 131 is formed at a top of the first through hole, and the third groove 131 is disposed at a side of the substrate 130 away from the stopper frame 140. Third recess 131 is favorable to going up plastic 160 and fixes a position the installation, and when last plastic 160 was for moulding plastics, it is more convenient to annotate the interior plastic of third recess 131, goes up plastic 160 and third recess 131 can in close contact with after moulding plastics, further increase sealing performance.

In an embodiment, the upper plastic 160 is partially embedded into the first through hole, correspondingly, the first groove 151 is disposed at the first through hole, a portion of the first groove 151 extends out of the first through hole and is located at a side of the substrate 130 away from the stopper frame 140, and a portion of the upper plastic 160 is embedded into the first through hole, so as to fill a gap between the first through hole and the post 150, thereby avoiding leakage. On the other hand, the upper plastic 160 is partially embedded into the first through hole, so that the sealing ring 170 can be effectively extruded, the sealing ring 170 is more tightly contacted with the stopper frame 140 and the substrate 130, and a good sealing effect is ensured.

In an embodiment, the pole 150 is a composite pole 150, the pole 150 includes a first material body and a second material body, a mounting groove is preset on the second material body, and the first material body is inserted into the mounting groove and fixed relatively to the second material body. Preferably, the negative electrode post 150 is a copper-aluminum composite post 150, the upper half portion is aluminum, the lower half portion is copper, and the purpose of manufacturing the copper-aluminum composite post 150 is achieved by presetting a groove on the copper, inserting an aluminum block, and welding a peripheral gap.

The application also claims a battery pack, which is formed by combining and packaging any one of the above battery cores.

The method solves the problem of liquid leakage caused by the fact that the sealing ring 170 is easily neglected to be installed in the conventional riveting type battery cell, and eliminates the problem of larger noise pollution caused by the fact that riveting equipment is needed by the riveting type cover plate 100; adopt square utmost point post 150 can great increase utmost point post 150's open area, square utmost point post 150 also compares in columniform utmost point post 150 has better effect of splining, can save some structural structure of splining of electric core. Therefore, the utility model discloses thereby some practical problems among the prior art have effectively been overcome and very high value of utilization and use meaning have. The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An electrical core, comprising:

the cover plate comprises a base plate, a stop frame, two pole columns and upper plastic cement, and the two cover plates are respectively a positive cover plate and a negative cover plate;

a housing disposed between the positive cover plate and the negative cover plate;

the pole column is provided with a first groove wound around the outer wall, the pole column sequentially penetrates through the stopping frame and the substrate, the upper plastic is in a frame shape, the inner wall of the upper plastic is provided with a first protrusion, and the first protrusion is matched with the first groove, so that the pole column, the stopping frame and the substrate are relatively fixed.

2. The electric core according to claim 1, wherein a sealing ring is sleeved on the pole, and the sealing ring is arranged between the stopper frame and the substrate.

3. The battery cell of claim 2, wherein a second through hole is formed in the stopper frame, the terminal post penetrates through the second through hole to penetrate through the stopper frame, a fourth groove is formed in a side, close to the substrate, of the second through hole, and the seal ring is partially embedded in the fourth groove.

4. The battery cell of claim 1, wherein a second groove is formed in a side of the stopper frame away from the substrate, and the bottom plate of the terminal post is inserted into the second groove.

5. The cell of claim 1, wherein the pole column has a rectangular cross section, and the upper plastic has a rectangular cross section and is in the form of a frame.

6. The battery cell of claim 1, wherein a first through hole is formed in the substrate, the terminal post penetrates through the substrate from the first through hole, a third groove is formed in the top of the first through hole, and the upper plastic is embedded into the third groove.

7. The electrical core of claim 6, wherein the upper plastic portion is embedded within the first through-hole.

8. The electric core according to claim 1, wherein the pole is a composite pole, the pole comprises a first material body and a second material body, a mounting groove is preset in the second material body, and the first material body is inserted into the mounting groove and fixed relative to the second material body.

9. The electrical core of claim 1, wherein the upper plastic of the positive cover plate is a conductive upper plastic.

10. A battery pack, wherein the electric core according to any one of claims 1 to 9 is used in the battery pack.