CN217280978U

CN217280978U - Battery monomer, power battery and manufacturing equipment of battery monomer

Info

Publication number: CN217280978U
Application number: CN202221142306.7U
Authority: CN
Inventors: 黄红光; 华超; 曾维权
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-08-23
Anticipated expiration: 2032-05-12

Abstract

The application provides a battery monomer, power battery and free manufacture equipment of battery relates to power battery's technical field. The battery cell includes: the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to form an accommodating cavity in a surrounding mode, and the left side and the right side of the top of the shell structure are arranged in a concave mode; the electric core assembly is provided with an electric connection end, the electric core assembly is arranged in the accommodating cavity, the electric connection end is correspondingly exposed at the concave position of the upper cover plate, and the upper surface of the electric connection end is not higher than that of the upper cover plate so as to form a positive pole or a negative pole. The upper cover plate is disposed at the upper end of the casing body to form a containing cavity for containing the electric core assembly, and the left side and the right side of the top of the casing structure are all sunken, so that the electric connection end of the electric core assembly is exposed out of the sunken position of the upper cover plate, the height of the electric connection end is not higher than that of the upper cover plate, the single battery is ensured to be not stressed, and the single anode or cathode of the battery is not stressed, so that the integration level of the whole structure is improved.

Description

Battery monomer, power battery and manufacturing equipment of battery monomer

Technical Field

The application relates to the technical field of power batteries, in particular to a battery monomer, a power battery and manufacturing equipment of the battery monomer.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and the electric vehicle becomes an important component of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection; for electric vehicles, battery technology is an important factor in its development.

In the related technology, due to the defect of the structural design of the power battery, the side, close to the pole, of the shell of the power battery is not stressed, and the integration of the whole battery system is influenced.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a single battery, a power battery and single battery manufacturing equipment, which are beneficial to the integrated setting of a battery system.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, the present application provides a battery cell comprising: the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to enclose and form an accommodating cavity, and the left side and the right side of the top of the shell structure are concavely arranged to form a sunken position with an arc part; and the electric core assembly is provided with an electric connection end, is configured in the accommodating cavity, correspondingly exposes out of the concave position of the upper cover plate, and has an upper surface not higher than that of the upper cover plate so as to form a positive electrode or a negative electrode.

In the process of above-mentioned realization, the upper cover plate disposes in the upper end of casing this part to form the chamber that holds electric core subassembly, and the left side and the right side at shell structure top all set up sunkenly, make electric connection end of electric core subassembly appear in the sunk position of upper cover plate, the height that highly is not higher than the upper cover plate of this electric connection end guarantees that battery monomer is at the in-process that uses, and the free positive pole of battery or negative pole are not atress, thereby improve overall structure's integrated level.

In some embodiments, the upper cover plate has a first horizontal segment, an arc segment and a second horizontal segment, and the arc segment is disposed between the first horizontal segment and the second horizontal segment for forming a connection between the first horizontal segment and the second horizontal segment.

In the process of above-mentioned realization, first horizontal segment, circular arc section and second horizontal segment are set to the upper cover plate, and the circular arc section is used for forming being connected between first horizontal segment and the second horizontal segment to when reducing the materials cost, also can realize that anodal and negative pole of electric core subassembly are not atress.

In some embodiments, the arc section is provided with an outer chamfer with a radius of 1-3 mm, so that the falling of the pole powder on the anode or the cathode can be prevented, and the production of the shell structure is facilitated.

In some embodiments, the arc section is further provided with an inner chamfer with the radius of 2-10 mm, so that the falling of pole powder on the anode or the cathode can be prevented, and the production of the shell structure is facilitated.

In some embodiments, the height of the upper surface of the upper cover plate is 2-10 mm higher than the height of the electric connection end, so that the integrated design of the whole structure is facilitated, and the upper cover plate can be ensured to be a main stress point.

In some embodiments, the electric core assembly includes a pole piece assembly, a conductive bar, a conductive block, an insulating pad and a pole post, the pole piece assembly and the conductive bar are disposed in the accommodating cavity, and the pole piece assembly and the conductive bar are fixedly connected, the insulating pad is disposed in the upper cover plate and between the conductive bar and between the upper cover plate and the pole post, and the insulating pad and the conductive block correspond to be used for the penetration of the conductive block, at least a part of the structure of the conductive block is exposed in the upper cover plate, and the conductive block and the conductive bar are fixedly connected, the pole post is disposed on one side of the conductive bar deviated from the conductive block, and the pole post and the conductive block are fixedly connected.

In the process of the realization, the pole piece assembly is connected with the conductive bar, the conductive bar is connected with the conductive block, the conductive block is connected with the pole column, the insulating pad is used for insulating between the pole column and the upper cover plate and insulating between the conductive bar and the upper cover plate, the adaptability is extremely wide, the space of the shell structure can be fully utilized, and the whole space utilization rate is improved.

In some embodiments, the conductive bar has a horizontal portion configured to be fixedly connected with the conductive block and a vertical portion configured to be arranged at the left side or the right side of the pole piece assembly for being fixedly connected with the pole piece assembly.

At the in-process of above-mentioned realization, electrically conductive row sets up horizontal part and vertical portion, horizontal part and conducting block fixed connection, and vertical portion is connected with the pole piece assembly, when guaranteeing space utilization, ensures pole piece assembly and conducting block intercommunication.

In some embodiments, the cell assembly further comprises explosion-proof valves disposed on the left and right sides of the housing structure.

In a second aspect, the present application also provides a power battery, including the battery cell as described in any one of the above.

The power battery provided in the embodiment of the second aspect of the present application includes the battery cell described in any one of the technical solutions of the first aspect, so that all technical effects possessed by any one of the embodiments are achieved, and details are not repeated here.

In a third aspect, the present application is also directed to a battery cell manufacturing apparatus, including: the first providing device is used for providing a shell structure, the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to enclose and form an accommodating cavity, and the left side and the right side of the top of the shell structure are arranged in a concave mode; and the second providing device is used for providing an electric core assembly, the electric core assembly is provided with an electric connection end, the electric core assembly is arranged in the accommodating cavity, the electric connection end is correspondingly exposed at the concave position of the upper cover plate, and the upper surface of the electric connection end is not higher than that of the upper cover plate so as to form a positive pole or a negative pole.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for a user of ordinary skill in the art, other related drawings can be obtained according to the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application.

Fig. 2 is an exploded view of a battery cell disclosed in an embodiment of the present application.

Fig. 3 is a cross-sectional view of a battery cell disclosed in an embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of fig. 3.

Reference numerals

100. A battery cell; 101. a housing structure; 1011. a housing base; 1012. an upper cover plate; 10121. a first horizontal segment; 10122. a circular arc section; 10123. a second horizontal segment; 102. an electrical core assembly; 1021. a pole piece assembly; 1022. a conductive bar; 1023. a conductive block; 1024. an insulating pad; 1025. a pole column; 103. an explosion-proof valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a user of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case to a user of ordinary skill in the art.

Examples

Electric vehicles, energy storage power stations and the like generally need to use power batteries with large capacity as power sources; besides high capacity, these power batteries should have good safety and long cycle life to meet the use standards and meet the needs of people.

The inventor finds that the existing battery core is mainly a square-shell battery core, a soft package battery core and a cylindrical battery core, and the square-shell battery core and the soft package battery core are regular rectangular structures, but the positive output pole and the negative output pole of the existing square-shell battery core are higher than the battery core, so that the pole face of the battery core can not be stressed, and the integration of the whole battery system is influenced.

In view of this, as shown in fig. 1, fig. 1 is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application; in a first aspect, the present application provides a battery cell comprising: shell structure and electric core subassembly, shell structure sets up to squarely, just shell structure has and is used for holding at least partly structure of electric core subassembly, shell structure's top is punched press in order to form the sunk position, makes just, the negative pole of electric core subassembly expose in during the sunk position, just, the negative pole of electric core subassembly highly is not higher than shell structure's top height.

Specifically, the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to enclose and form an accommodating cavity, and the left side and the right side of the top of the shell structure are arranged in a concave mode to form a concave position with an arc part; the electric core assembly is arranged in the accommodating cavity, the electric end is correspondingly exposed at the concave position of the upper cover plate, and the upper surface of the electric end is not higher than that of the upper cover plate so as to form a positive electrode or a negative electrode.

Illustratively, the housing body and the upper cover plate are fixedly connected by welding, mainly by laser welding, the top of the housing structure is stamped, so that the recessed positions are formed on the left and right sides of the top of the upper cover plate and the top of the housing structure, when the electrical connection end of the electrical core assembly is exposed at the recessed positions, the height of either the positive electrode or the negative electrode formed by the electrical core assembly is not higher than the top height of the housing structure, so that when the battery cell is assembled into a battery module, the FPC (Flexible Printed circuit board) or FFC (Flexible Flat Cable) connected with the battery cell does not bear pressure, and simultaneously, when the battery cell is assembled into the battery module subsequently, the upper surface and the lower surface of the battery module can be in contact with a liquid cooling plate to control the temperature, the cooling effect is increased.

As shown in fig. 2, fig. 2 is an exploded schematic view of a battery cell disclosed in the embodiment of the present application; the upper cover plate is provided with a first horizontal section, an arc section and a second horizontal section, and the arc section is configured between the first horizontal section and the second horizontal section so as to be used for forming the connection between the first horizontal section and the second horizontal section. For example, when the housing structure is recessed, the left side and the right side of the top of the upper cover plate need to be stamped to form the first horizontal section, the circular arc section and the second horizontal section, and the second horizontal section is located on the left side and the right side of the first horizontal section, so that the electrical connection end of the electrical core assembly corresponds to the second horizontal section; in other embodiments, when the upper cover plate is stamped to form the recessed position, the upper cover plate may finally form a first horizontal segment, a vertical segment and a second horizontal segment, where the vertical segment is located between the first horizontal segment and the second horizontal segment, and the second horizontal segment is located on the left and right sides of the first horizontal segment, so that the electrical connection end of the electrical core assembly corresponds to the second horizontal segment, and so on.

Referring to fig. 2-4, the arc section is configured with an outer chamfer with a radius of 1-3 mm, which can prevent the falling of the anode powder or the cathode powder and facilitate the production of the shell structure.

Referring to fig. 2-4 again, the arc section is further provided with an inner chamfer with a radius of 2-10 mm, preferably, the radius of the chamfer is 5mm, so that the falling of the pole powder on the anode or the cathode can be prevented, and the production of the shell structure is facilitated.

In some embodiments, the height of the upper surface of the upper cover plate is 2-10 mm higher than the height of the electric connection end, and the preferred scheme is that the height of the upper surface of the upper cover plate is 3mm higher than the height of the electric connection end, so that the integrated design of the whole structure is facilitated, and meanwhile, the upper cover plate can be guaranteed to be a main stress point.

Referring to fig. 3-4, the electrode assembly includes an electrode assembly, a conductive bar, a conductive block, an insulating pad and a terminal post, the electrode assembly and the conductive bar are disposed in the accommodating cavity, and the electrode tab of the electrode assembly is fixedly connected with the conductive bar (ultrasonic welding or laser welding), the insulating pad is disposed between the upper cover plate and the conductive bar and between the upper cover plate and the terminal post, the insulating pad corresponds to the conductive block for the penetration of the conductive block, at least a part of the structure of the conductive block is exposed out of the upper cover plate, the conductive block is fixedly connected with the conductive bar, the terminal post is disposed on one side of the conductive block deviating from the conductive bar, the terminal post is fixedly connected with the conductive block, the conductive block conducts the terminal post with the conductive bar, the connection mode can be a welding mode or a riveting mode; wherein the pole piece assembly is arranged in an irregular shape to fit the shape of the shell structure for maximum spatial duty cycle.

In some embodiments, the cell assembly further includes explosion-proof valves disposed on left and right sides of the housing structure, and the principle is that when the pressure inside the housing structure is lower than a set explosion value of the explosion-proof valves, the housing structure is in a normal working state, and gas flows from a side with higher pressure to a side with lower pressure, so as to balance internal and external pressures of the housing structure.

In a second aspect, the present application further provides a power battery, including any one of the above battery cells, specifically, the battery cell has a plurality of battery cells, and a plurality of the battery cells are assembled to form a battery module, and then the battery module is assembled in a battery box to form the power battery, wherein the power battery can be used to provide electric energy for electric equipment, and an application scenario of the power battery may be a vehicle, a ship, or a spacecraft.

The power battery provided in the embodiment of the second aspect of the present application includes the battery cell according to any one of the technical solutions of the first aspect, so that all technical effects of any one of the embodiments described above are achieved, and details are not repeated herein.

It should be noted that, for the structure of the battery cell manufactured by the manufacturing apparatus provided in the foregoing embodiments, reference may be made to the battery cell provided in each of the foregoing embodiments, and details are not described herein again.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, comprising:

the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to enclose and form an accommodating cavity, and the left side and the right side of the top of the shell structure are arranged in a concave mode to form a concave position with an arc part;

and the electric core assembly is provided with an electric connection end, is configured in the accommodating cavity, correspondingly exposes out of the concave position of the upper cover plate, and has an upper surface not higher than that of the upper cover plate so as to form a positive electrode or a negative electrode.

2. The battery cell as recited in claim 1, wherein the upper cover plate has a first horizontal segment, an arc segment and a second horizontal segment, and the arc segment is disposed between the first horizontal segment and the second horizontal segment for forming a connection between the first horizontal segment and the second horizontal segment.

3. The battery cell as claimed in claim 2, wherein the circular arc section is configured with an outer chamfer and the chamfer radius is 1-3 mm.

4. The battery cell as claimed in claim 2 or 3, wherein the arc section is further provided with an inner chamfer, and the radius of the chamfer is 2-10 mm.

5. The battery cell according to claim 1, wherein the upper surface of the upper cover plate has a height 2-10 mm higher than the height of the electrical connection terminal.

6. The battery cell of claim 1, wherein the electrode assembly includes an electrode assembly, a conductive bar, a conductive block, an insulating pad, and a terminal post, the electrode assembly and the conductive bar are disposed in the accommodating cavity, the electrode assembly is fixedly connected to the conductive bar, the insulating pad is disposed between the upper cover plate and the conductive bar and between the upper cover plate and the terminal post, the insulating pad corresponds to the conductive block for the penetration of the conductive block, at least a portion of the conductive block is exposed from the upper cover plate, the conductive block is fixedly connected to the conductive bar, the terminal post is disposed on a side of the conductive block away from the conductive bar, and the terminal post is fixedly connected to the conductive block.

7. The battery cell as recited in claim 6, wherein the conductive bar has a horizontal portion and a vertical portion, the horizontal portion is configured to be fixedly connected to the conductive block, and the vertical portion is configured to be at a left side or a right side of the pole piece assembly for fixedly connecting to the pole piece assembly.

8. The battery cell as recited in claim 6 wherein the cell assembly further comprises explosion-proof valves disposed on left and right sides of the housing structure.

9. A power cell comprising a cell according to any one of claims 1 to 8.

10. An apparatus for manufacturing a battery cell, comprising:

the first providing device is used for providing a shell structure, the shell structure is provided with a shell body part and an upper cover plate, the upper cover plate is arranged at the upper end of the shell body part to enclose and form an accommodating cavity, and the left side and the right side of the top of the shell structure are arranged in a concave mode;

and the second providing device is used for providing an electric core assembly, the electric core assembly is provided with an electric connection end, the electric core assembly is arranged in the accommodating cavity, the electric connection end is correspondingly exposed at the concave position of the upper cover plate, and the upper surface of the electric connection end is not higher than that of the upper cover plate so as to form a positive pole or a negative pole.