CN218351573U

CN218351573U - Top cap subassembly, battery and battery package

Info

Publication number: CN218351573U
Application number: CN202222717109.XU
Authority: CN
Inventors: 郑坤; 廉俊杰; 李勇军
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-20
Anticipated expiration: 2032-10-14

Abstract

The utility model provides a pair of top cap subassembly, battery and battery package relates to battery technical field. The top cover assembly comprises a connecting piece and a top cover, the connecting piece comprises a first surface and a second surface which are oppositely arranged, the first surface is provided with a mounting groove, and the second surface is used for being connected with the battery cell; the top cover comprises a pole, and a boss is arranged at one end of the pole close to the connecting sheet; the boss is arranged in the mounting groove and connected with the connecting piece, and the projection of the boss on the connecting piece is positioned in the mounting groove. Effectively reduced top cap subassembly's thickness, avoided occupying the inner space of too much battery, improved battery capacity, reduced technology simultaneously and made the requirement, the assembly is simpler relatively.

Description

Top cap subassembly, battery and battery package

Technical Field

The utility model relates to a battery technology field particularly, relates to a top cap subassembly, battery and battery package.

Background

The inventor researches and discovers that the terminal of the top cover of the conventional lithium ion secondary battery is mostly provided with a lug boss. The connection of the connecting sheet and the pole of the top cover mainly has two modes, one mode is that the connecting sheet is directly welded with the end face of the lug boss, so that the internal space of the battery is easily reduced, and the capacity of the battery is reduced. The other type is that a through hole is formed in the connecting sheet, the lug boss of the pole is inserted into the through hole, and the lug boss is connected with the connecting sheet in a seam welding mode, although the occupation of the internal space of the battery can be reduced, the seam welding mode has high requirements on the adaptability of the manufacturing process, strict hole positions are required to correspond, the lug boss and the through hole on the connecting sheet are completely matched in size to carry out seam welding, the requirements on the manufacturing process are high, and the assembly is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a top cap subassembly, battery and battery package, its thickness that can reduce top cap subassembly avoids occuping the inside too much space of battery, improves battery capacity, can reduce technology simultaneously and make the requirement.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a header assembly, comprising:

the connecting piece comprises a first surface and a second surface which are oppositely arranged, the first surface is provided with a mounting groove, and the second surface is used for being connected with the battery cell;

the top cover comprises a pole, and a boss is arranged at one end, close to the connecting sheet, of the pole; the boss is arranged in the mounting groove and connected with the connecting sheet; the projection of the boss on the connecting piece is positioned in the mounting groove.

In an alternative embodiment, the depth of the mounting groove is equal to the height of the boss.

In an alternative embodiment, the boss is cylindrical, the cross section of the mounting groove is circular, and the outer diameter of the boss is less than or equal to the inner diameter of the mounting groove;

or the cross section of the mounting groove is rectangular, and the width of the boss is smaller than or equal to that of the mounting groove.

In an alternative embodiment, the boss and the connecting piece are connected by welding.

In an optional embodiment, the pole comprises a body and a limiting block which is arranged along the radial direction of the body in a protruding mode, and the limiting block is arranged at one end portion, close to the connecting sheet, of the body; the boss is arranged at one end of the limiting block, which is far away from the body, in a protruding manner along the axial direction;

the top cap still includes top cap piece and sealing washer, the top cap piece is equipped with the confession the through-hole that utmost point post passed, the sealing washer is located the body with between the pore wall of through-hole, just the one end of sealing washer with the stopper butt.

In an optional embodiment, the thickness of the limit block in the axial direction is a distance between a side surface of the seal ring abutted against the limit block and a side surface of the boss close to the body, and the thickness of the limit block is greater than or equal to a preset thickness.

In a second aspect, the present invention provides a battery, comprising an electric core and a top cap assembly as in any one of the previous embodiments, wherein the connecting sheet is kept away from one side of the boss and the electric core is connected.

In an optional embodiment, the battery cell is provided with a tab, and the tab is welded with the connecting sheet.

In an optional embodiment, the battery further comprises a casing, the casing has an opening, the battery cell is disposed in the casing, and the top cover assembly covers the opening.

In a third aspect, the present invention provides a battery pack comprising a plurality of batteries as described in any one of the previous embodiments.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides a top cap subassembly, utmost point post are equipped with the boss, and the connection piece is equipped with the mounting groove that corresponds with the boss, and the boss is located the mounting groove and realizes the connection of connection piece and utmost point post. Because the connection piece is equipped with the mounting groove, can reduce whole top cap subassembly's thickness, and then avoid occupying the inside too much space of battery, improve the capacity of battery. And the mounting groove has the positioning function, so that the assembly efficiency is improved conveniently. The projection of the boss on the connecting piece is located in the mounting groove, strict hole position correspondence is not needed, adaptation requirements are lower, the manufacturing requirements of the process are reduced, assembly is relatively simpler, and production efficiency is improved.

The embodiment of the utility model provides a battery, including electric core and foretell top cap subassembly, because top cap subassembly's thickness is whole less, can practice thrift the inside space of battery, improve the capacity of battery, assembly process is simpler simultaneously, is favorable to improving production efficiency.

The embodiment of the utility model provides a battery pack, including foretell battery, small, the electric capacity is big, and assembly process is simple, and production efficiency is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a first view angle of a structure of a connecting sheet according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a second view angle of a structure of a connecting sheet according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a top cover assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery with a top cap assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery according to an embodiment of the present invention.

Icon: 100-a cap assembly; 110-a connecting sheet; 111-a first surface; 113-a second surface; 115-a mounting groove; 117-bending section; 120-a top cover; 130-pole column; 131-a boss; 133-body; 135-a stop block; 141-top cover sheet; 142-a sealing ring; 143-bumps; 151-conductive blocks; 152-coating plastic; 153-lower plastic; 200-a battery; 210-a cell; 220-pole ear; 230-a housing.

Detailed Description

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

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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 or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

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 invention, it should also be noted that, unless otherwise explicitly specified or limited, 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 invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present embodiment provides a top cover assembly 100, including a connecting sheet 110 and a top cover 120, where the connecting sheet 110 includes a first surface 111 and a second surface 113 that are oppositely disposed, the first surface 111 is provided with a mounting groove 115, and the second surface 113 is used for connecting with a battery cell 210; the top cover 120 comprises a pole 130, and one end of the pole 130, which is close to the connecting sheet 110, is provided with a boss 131; the convex plate 131 is disposed in the mounting groove 115 and connected to the connecting plate 110. The thickness of the cap assembly 100 is effectively reduced, the occupation of excessive internal space of the battery 200 is avoided, and the capacity of the battery 200 is improved. And, the projection of the boss 131 on the coupling piece 110 is positioned in the mounting groove 115, so that the boss 131 is smoothly inserted into the mounting groove 115. The mounting groove 115 can also play a certain positioning role, so that the assembly convenience and the assembly efficiency are improved. In the top cover assembly 100, the connecting sheet 110 and the boss 131 are connected in a manner that strict hole positions are not required to correspond, the adaptation requirement is lower, the process manufacturing requirement is reduced, the assembly is relatively simpler, and the improvement of the production efficiency is facilitated.

Optionally, the depth of the mounting groove 115 is equal to the height of the boss 131. The bosses 131 may be completely inserted into the mounting grooves 115 to reduce the overall height and save space. It is easily understood that the height of the boss 131 is equal to or less than the thickness of the connection piece 110. In this embodiment, the height of the boss 131 is relatively smaller, which is beneficial to reducing the overall thickness of the top cover assembly 100.

In this embodiment, the boss 131 is cylindrical, the cross section of the mounting groove 115 is circular, and the outer diameter of the boss 131 is smaller than or equal to the inner diameter of the mounting groove 115, so that the boss 131 can be conveniently and smoothly inserted into the mounting groove 115. Of course, in other embodiments, the boss 131 may be square or other shapes, and is not limited in this regard.

Alternatively, if the mounting groove 115 has a rectangular cross-section. The width of the boss 131 is less than or equal to the width of the mounting groove 115, and the length of the mounting groove 115 is equal to the width of the connecting piece 110, so that the welding operation of the connecting piece 110 and the boss 131 is facilitated, and the operation is more convenient. The width direction of the mounting groove 115 can be understood as the length direction of the connecting piece 110, i.e. the connecting line direction between two poles 130 in the same top cover 120. It should be noted that the size of the boss 131 is smaller than the notch size of the mounting groove 115, that is, the projection of the boss 131 on the connecting piece 110 is located in the mounting groove 115, so as to improve the convenience and efficiency of assembly.

Alternatively, the boss 131 and the connecting piece 110 are connected by welding, such as penetration welding. In this embodiment, since the boss 131 is disposed in the mounting groove 115, the end surface of the boss 131 is welded to the bottom wall of the mounting groove 115, and the side surface of the boss 131 is welded to the peripheral wall of the mounting groove 115, the welding area is larger, the structure is more reliable, and the overcurrent capacity of the battery 200 is larger. And compared with seam welding, the process adaptability requirement is lower, the process requirement is not high, the process cost can be saved, and the production efficiency is improved.

Optionally, the post 130 includes a body 133 and a stopper 135 protruding outward along the radial direction of the body 133, and the stopper 135 is disposed at an end of the body 133 close to the connecting piece 110; the end of the stop block 135 away from the body 133 is provided with a boss 131 in an axial direction. The top cover 120 further includes a top cover plate 141 and a sealing ring 142, the top cover plate 141 is provided with a through hole for the pole 130 to pass through, the sealing ring 142 is arranged between the body 133 and the hole wall of the through hole, and one end of the sealing ring 142 abuts against the limiting block 135. In this embodiment, the boss 131, the stopper 135 and the body 133 may be integrally formed, i.e., as a whole. Alternatively, the pole 130 may be a rivet.

Optionally, the thickness of the limiting block 135 in the axial direction of the post 130 is a distance between a side surface of the sealing ring 142 abutted against the limiting block 135 and a side surface of the boss 131 close to the body 133, and the thickness of the limiting block 135 is greater than or equal to a preset thickness, so as to ensure that the sealing ring 142 is not affected in the welding process of the boss 131 and the connecting piece 110. It can be appreciated that if the thickness of the stopper 135 is too small, the sealing ring 142 is likely to melt at high temperature during the welding process, which may cause the sealing failure. If the thickness of the stopper 135 is too large, the thickness of the entire top cap assembly 100 is easily increased, and the space inside the battery 200 is occupied, which is not favorable for increasing the capacity of the battery 200. In this embodiment, the predetermined thickness may be 2 to 10mm, such as 3mm or 5mm, or may be flexibly set according to other actual requirements, which is not limited herein.

Optionally, a protrusion 143 is disposed at an end of the sealing ring 142 close to the stopper 135, and the protrusion 143 protrudes outward in the radial direction. By the arrangement, the strength of the sealing ring 142 can be improved, the contact area between the sealing ring 142 and the pole 130 is increased, the supporting is more reliable, and the sealing effect is improved.

Optionally, the top cover 120 further includes a conductive block 151, an upper plastic 152, and a lower plastic 153. The upper plastic 152 and the lower plastic 153 are respectively disposed on two sides of the top cover plate 141, and the conductive block 151, the upper plastic 152 and the lower plastic 153 are respectively provided with a through hole for the pole 130 to pass through, and the through hole is coaxially communicated with the through hole. The conductive block 151 is disposed on a side of the upper plastic 152 away from the top cover plate 141. The upper plastic 152 is used to isolate the conductive block 151 from the top cover sheet 141, and the lower plastic 153 is used to isolate the top cover sheet 141 from the connecting pad 110. Of course, in this embodiment, the lower plastic 153 is also used to isolate the top cover plate 141 from the limiting block 135, so as to improve electrical safety. In this embodiment, the conductive block 151, the upper plastic 152, the top cover plate 141, and the lower plastic 153 are arranged in sequence from top to bottom. Here, "up" indicates an end of the pole 130 away from the connecting piece 110, and "down" indicates an end of the pole 130 close to the connecting piece 110. The limiting block 135 of the post 130 is located on a side of the lower plastic 153 away from the top cover plate 141. The sealing ring 142 is located on the side of the body 133, and is abutted against the conductive block 151, the upper plastic 152, the top cover plate 141, the lower plastic 153, and the limiting block 135, respectively, so as to achieve a good sealing effect.

In the top cap assembly 100 provided by the embodiment, the post 130 is provided with the boss 131, the connecting piece 110 is provided with the mounting groove 115, and the boss 131 is arranged in the mounting groove 115, so that the overall thickness of the top cap assembly 100 can be reduced, the occupation of the internal space of the battery 200 is reduced, and the improvement of the energy density of the battery 200 is facilitated. The boss 131 and the connecting sheet 110 are welded in a penetrating manner, so that the welding area is large, the overcurrent capacity of the battery 200 is improved, the process requirement is low, strict assembly precision is not required, and the process operation is simpler. Due to the arrangement of the limiting block 135, a certain distance can be ensured between the welding positions of the sealing ring 142 and the boss 131, sealing failure of the sealing ring 142 caused by high-temperature fusion of welding is prevented, the sealing performance and the electrical insulation performance are improved, and the safety performance of a battery 200 product is improved.

With reference to fig. 4 and 5, an embodiment of the present invention provides a battery 200, which includes a battery cell 210 and a cap assembly 100 according to any one of the foregoing embodiments, wherein one side of the connecting sheet 110 away from the boss 131 is connected to the battery cell 210. Optionally, the battery cell 210 is provided with a tab 220, and the tab 220 is welded to the connecting sheet 110. For example, the tab 220 may be welded to the connecting plate 110 by ultrasonic welding or laser welding.

Optionally, one end of the connecting sheet 110, which is away from the terminal post 130, is provided with a bending section 117, and the bending section 117 is bent toward the lower plastic 153, so as to save space. The bent segment 117 is welded with the tab 220. The arrangement of the bent section 117 can further reduce the space occupation ratio of the connecting sheet 110 in the battery 200, which is beneficial to improving the capacity and energy density of the battery 200.

Optionally, the battery 200 further includes a casing 230, the casing 230 has an opening, the battery cell 210 is disposed in the casing 230, and the top cover assembly 100 covers the opening. The housing 230 may be an aluminum or steel shell, and the like, and is not limited in particular.

The battery 200 provided by the embodiment has the advantages that the overall height of the top cover assembly 100 is low, the size is reduced, the occupied space inside the battery 200 is reduced, the capacity of the battery 200 is improved, and the energy density of the battery 200 is improved. The cap assembly 100 of the battery 200 can weld the connecting tab 110 and the terminal post 130 without adding additional parts and without affecting the sealing ring 142. The space occupied by the pole 130 and the connecting sheet 110 in the battery 200 is reduced, the capacity of the battery 200 is improved, and meanwhile, the safety of the battery cell 210 is ensured.

The embodiment of the utility model provides a still provide a battery package, including a plurality of foretell batteries 200, be favorable to reducing the volume of battery package, promote the capacity of battery package, and assembly process is simple, and production efficiency is high.

To sum up, the utility model discloses beneficial effect includes:

the embodiment of the utility model provides a top cap assembly 100, utmost point post 130 are equipped with boss 131, and connection piece 110 is equipped with the mounting groove 115 that corresponds with boss 131, and boss 131 is located the mounting groove 115 and realizes connection piece 110 and utmost point post 130's connection. Since the connection piece 110 is provided with the mounting groove 115, the thickness of the entire top cap assembly 100 can be reduced, thereby avoiding occupying too much space inside the battery 200 and improving the capacity of the battery 200. And the mounting groove 115 has a positioning function, which is convenient for improving the assembly efficiency. The boss 131 and the connecting sheet 110 are welded in a penetrating manner, so that the welding area is large, the overcurrent capacity of the battery 200 is improved, the process requirement is low, strict assembly precision such as hole position correspondence is not required, and the process operation is simpler. Due to the arrangement of the limiting block 135, a certain distance can be ensured between the sealing ring 142 and the welding position of the boss 131, sealing failure caused by high-temperature fusion of welding of the sealing ring 142 is prevented, the sealing performance and the electrical insulation performance are improved, and the safety performance of a battery 200 product is improved. The bent sections 117 of the tabs 220 are arranged to further reduce the occupied space inside the battery 200, thereby improving the energy density of the battery 200.

The embodiment of the utility model provides a battery 200, including electric core 210 and foretell top cap assembly 100, because top cap assembly 100's whole thickness is less, can reduce and occupy the inside space of battery 200, improve battery 200's capacity, promote battery 200's energy density. And the process requirement is lower, strict hole position correspondence is not required in assembly, and the assembly is simpler.

The embodiment of the utility model provides a battery package, including a plurality of foretell batteries 200, be favorable to reducing the volume of battery package, promote the capacity of battery package, and assembly process is simple, and production efficiency is high.

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

Claims

1. A header assembly, comprising:

2. The header assembly of claim 1, wherein the mounting slot has a depth equal to a height of the boss.

3. The header assembly of claim 1, wherein the boss is cylindrical, the mounting groove is circular in cross-section, and the boss has an outer diameter that is less than or equal to an inner diameter of the mounting groove;

4. The header assembly of claim 1, wherein the boss is connected to the tab by welding.

5. The top cover assembly according to any one of claims 1 to 4, wherein the pole comprises a body and a limiting block which is arranged along the body in a protruding manner and is arranged at one end part of the body close to the connecting sheet; the boss is arranged at one end of the limiting block, which is far away from the body, in a protruding mode along the axial direction;

6. The top cap assembly of claim 5, wherein the thickness of the stopper in the axial direction is a distance between a side surface of the boss adjacent to the body and a side surface of the seal ring abutting against the stopper, and the thickness of the stopper is greater than or equal to a predetermined thickness.

7. A battery comprising a cell and the cap assembly of any one of claims 1 to 6, wherein the side of the tab remote from the boss is connected to the cell.

8. The battery of claim 7, wherein the cell is provided with tabs, and the tabs are welded to the connecting tabs.

9. The battery of claim 7 or 8, further comprising a housing having an opening, wherein the cell is disposed within the housing, and wherein the cap assembly covers the opening.

10. A battery pack comprising a plurality of batteries according to any one of claims 7 to 9.