CN218783181U

CN218783181U - Top cap subassembly and battery

Info

Publication number: CN218783181U
Application number: CN202223023203.1U
Authority: CN
Inventors: 郑旭; 舒宽金; 贺孝武; 安苏礼; 邓振; 何巍
Original assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Current assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-31
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a top cap subassembly and battery, wherein, the top cap subassembly includes the top cap piece, utmost point post, the briquetting, be provided with first mounting hole on the top cap piece, the briquetting has relative first side and the second side that sets up, the second side supports tightly with the top cap piece, be provided with first recess on the first side, the tank bottom of first recess is provided with the second mounting hole, utmost point post runs through second mounting hole and first mounting hole, the terminal surface edge of utmost point post is provided with round second recess, the second recess forms the holding tank with first recess intercommunication, utmost point post and briquetting welding, the holding tank is arranged in holding the material that melts in the welding process. Through setting up the holding tank, the holding tank can hold the melting material in the welding process, compensates the welding headroom on the one hand, reduces the welding seam height to the influence of coping subassembly size, and on the other hand can also increase welding area, improves welding strength, improves coping subassembly's welding quality.

Description

Top cap subassembly and battery

Technical Field

The utility model relates to a power battery technical field especially relates to a top cap subassembly to and battery including this top cap subassembly.

Background

The power battery in the new energy automobile comprises a top cover assembly, and in the prior art, the top cover assembly is mainly manufactured through an injection molding process and a riveting process. Generally, parts of each part are molded in an injection molding mode, and then the parts of each part are assembled in a riveting or welding mode in sequence, however, in the assembling process, under the limitation of process precision, the size of the assembled top cover assembly has larger deviation from the design size, so that the top cover assembly is scrapped, and the control of production cost and the improvement of production efficiency are not facilitated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the top cover assembly is simple in structure, capable of being assembled accurately and good in quality.

The embodiment of the utility model provides a another aim at: a battery is provided, which is low in mass production cost.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the first aspect provides a top cover assembly, including top cap piece, utmost point post, briquetting, be provided with first mounting hole on the top cap piece, the briquetting has relative first side and the second side that sets up, the second side with the top cap piece supports tightly, be provided with first recess on the first side, the tank bottom of first recess is provided with the second mounting hole, utmost point post runs through the second mounting hole with first mounting hole, the terminal surface edge of utmost point post is provided with round second recess, the second recess with first recess intercommunication forms the holding tank, utmost point post with the briquetting welding, the holding tank is arranged in holding the welding process fused material.

As a preferable mode of the top cover assembly, groove walls of the first groove and/or the second groove are inclined, and a size of a notch of the accommodating groove is larger than a size of a groove bottom of the accommodating groove.

As a preferred embodiment of the top cover assembly, the groove bottom of the first groove is flush with the groove bottom of the second groove.

As a preferred scheme of the top cover assembly, the pole comprises a cylinder and an end cap which are connected, the diameter of the end cap is larger than that of the cylinder, the second groove is formed in the cylinder, a circle of first step surface is annularly arranged on the periphery of the cylinder, the first step surface is located outside the second mounting hole, and a gap between the cylinder and the second mounting hole is shielded by the first step surface.

As a preferable scheme of the top cover assembly, the first step surface is arranged obliquely, the inner side of the first step surface is higher than the outer side of the first step surface, and one end of the second mounting hole, which is close to the top cover plate, is provided with an orifice chamfer.

As a preferred scheme of the top cover assembly, the pole column comprises a positive pole column and a negative pole column, the negative pole column is a composite pole column, and the negative pole column is formed by punching.

As a preferable scheme of the top cover assembly, a side surface, away from the pressing block, of the pole is concavely provided with a weight reduction groove.

As a preferred scheme of top cap subassembly, utmost point post is including the cylinder and the end cap that link to each other, the diameter of end cap is greater than the diameter of cylinder, the second recess sets up on the cylinder, be provided with the second step face on the end cap, the end cap is kept away from the diameter of cylinder one end is greater than the end cap is close to the diameter of cylinder one end, the end cap is kept away from the one end of cylinder inserts in the connecting hole of utmost point ear connection piece.

As a preferable scheme of the top cover assembly, a third groove is formed in the top cover sheet, the first mounting hole is formed in the bottom of the third groove, an insulating member is arranged between the top cover sheet and the pressing block, and a part of the insulating member is embedded into the third groove.

In a second aspect, a battery is provided, which includes the above cap assembly.

The utility model has the advantages that: through setting up the holding tank, the holding tank can hold the melting material in the welding process, compensates the welding headroom on the one hand, reduces the welding seam height to the influence of coping subassembly size, and on the other hand can also increase welding area, improves welding strength, improves coping subassembly's welding quality.

Drawings

The present invention will be described in further detail with reference to the drawings and examples.

Fig. 1 is a schematic view of a top cover assembly according to an embodiment of the present invention.

Fig. 2 is a schematic view partially in section of a view angle of the top cap assembly according to an embodiment of the present invention.

Fig. 3 is a partial cross-sectional view of another view of the cap assembly according to an embodiment of the present invention.

Fig. 4 is an exploded view of the top cap assembly according to the embodiment of the present invention.

In the figure:

100. accommodating grooves;

1. a top cover sheet; 101. a first mounting hole; 102. an explosion-proof valve; 103. a liquid injection hole; 104. a third groove; 2. a pole column; 201. a cylinder; 2011. a first step surface; 2012. a second groove; 202. an end cap; 2021. a second step surface; 2022. a weight reduction groove; 3. briquetting; 301. a first groove; 302. a second mounting hole; 303. chamfering the hole opening; 4. plastic is coated; 401. a fourth mounting hole; 5. plastic is discharged; 501. a third mounting hole; 6. a seal ring; 7. a tab connecting sheet; 701. and connecting the holes.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3 (some reference numbers refer to fig. 4), the utility model provides a pair of top cap subassembly, including top cover plate 1, utmost point post 2, briquetting 3 and insulating part, be provided with first mounting hole 101 on the top cover plate 1, utmost point post 2 runs through first mounting hole 101 and is connected with briquetting 3, be provided with the insulating part between top cover plate 1 and utmost point post 2 and the briquetting 3, briquetting 3 has relative first side and the second side that sets up, the second side supports tightly with top cover plate 1, be provided with first recess 301 on the first side, the tank bottom of first recess 301 is provided with second mounting hole 302, second mounting hole 302 runs through the second side, utmost point post 2 run through second mounting hole 302 with first mounting hole 101, utmost point post 2's terminal surface edge is provided with round second recess 2012, second recess 2012 communicates with first recess 301 and forms holding tank 100, utmost point post 2 welds with briquetting 3, holding tank 100 is used for holding the material that melts in the welding process. Through setting up holding tank 100, holding tank 100 can hold the material that melts in the welding process, compensates the welding headroom on the one hand, reduces the influence of welding seam height to the top cap subassembly size, and on the other hand can also increase welding area, improves welding strength, improves top cap subassembly's welding quality.

Referring to fig. 2 and 3, specifically, groove walls of the first groove 301 and the second groove 2012 are inclined, and a notch size of the receiving groove 100 is larger than a groove bottom size of the receiving groove 100. By setting the size of the notch of the accommodating groove 100 to be larger than the size of the groove bottom of the accommodating groove 100, on one hand, the volume of the accommodating groove 100 can be increased, and an accommodating space is provided for a welding seam; on the other hand, can conveniently weld laser alignment holding tank 100 and weld, reduce the welding degree of difficulty. In other embodiments, only the groove wall slopes of the first groove 301 or the second groove 2012 may be provided.

Specifically, the groove bottom of the first groove 301 is flush with the groove bottom of the second groove 2012. Through the tank bottom parallel and level that sets up the tank bottom of first recess 301 and second recess 2012, in welding process, the metal that melts can evenly distributed at the tank bottom of holding tank 100, helps improving the fashioned quality of welding seam, improves the welding effect.

Referring to fig. 3 and 4, in the present embodiment, the insulating member includes a sealing ring 6, a lower plastic 5 and two upper plastics 4, wherein two third mounting holes 501 are provided on the lower plastic 5, the two third mounting holes 501 and the two first mounting holes 101 correspond to each other one by one, the sealing ring 6 is disposed in the third mounting holes 501, fourth mounting holes 401 are provided on the two upper plastics 4, the lower plastic 5 and the upper plastic 4 are respectively disposed on two sides of the top cover plate 1, and the pole 2 sequentially passes through the sealing ring 6, the first mounting holes 101 and the fourth mounting holes 401 to be connected to the press block 3.

In this embodiment, the pole 2 includes a cylinder 201 and an end cap 202 connected to each other, the diameter of the end cap 202 is larger than that of the cylinder 201, a second groove 2012 is provided on the cylinder 201, a ring of first step surfaces 2011 is annularly provided on the periphery of the cylinder 201, the first step surfaces 2011 are located outside the second mounting hole 302, and the first step surfaces 2011 shield a gap between the cylinder 201 and the second mounting hole 302. Through setting up first step face 2011, first step face 2011 can shelter from the laser welding in-process, and the light leak between cylinder 201 and the second mounting hole 302 avoids welding laser burn other spare parts such as plastic 5 down, effectively improves the security performance of battery.

Specifically, the first step surface 2011 is obliquely arranged, the inner side of the first step surface 2011 is higher than the outer side of the first step surface 2011, and one end of the second mounting hole 302 close to the top cover plate 1 is provided with an orifice chamfer 303. By arranging the inclined first step surface 2011 and arranging the orifice chamfer 303 at the end of the second mounting hole 302, the manufacturing precision of the pole 2, the top cover plate 1 and the pressing block 3 can be reduced by matching the inclined first step surface 2011 and the orifice chamfer 303, and the production cost is reduced.

Specifically, the pole 2 includes a positive pole and a negative pole, wherein the negative pole is a composite pole and is formed by punching. In this embodiment, the bar-shaped copper-aluminum composite plate is directly punched to obtain the negative pole, so that the manufacturing difficulty and manufacturing cost of the negative pole can be reduced, and the friction welding process steps of the copper material and the aluminum material on the negative pole are reduced.

Further, a weight reduction groove 2022 is concavely arranged on one side surface of the pole post 2 away from the pressing block 3. By providing the weight-reducing groove 2022, the weight of the pole 2 can be reduced, thereby reducing the weight of the cap assembly.

Specifically, the end cap 202 is provided with a second step surface 2021, the diameter of the end cap 202 away from the cylinder 201 is larger than the diameter of the end cap 202 close to the cylinder 201, and the end of the end cap 202 away from the cylinder 201 is inserted into the connecting hole 701 of the tab connecting plate 7. Through setting up second step face 2021, can make things convenient for the equipment and the welding of utmost point post 2 and utmost point ear connection piece 7, improve assembly efficiency.

Specifically, the top cover plate 1 is provided with a third groove 104, the first mounting hole 101 is arranged at the bottom of the third groove 104, and the upper plastic 4 is embedded in the third groove 104. Through setting up third recess 104, can provide the location for the equipment of top cap piece 1 and last plastic 4 for fourth mounting hole 401 is concentric with first mounting hole 101, reduces top cap components's the equipment degree of difficulty.

In this embodiment, in order to improve the safety performance of the battery and facilitate the assembly of the battery, the top cover sheet 1 is further provided with an explosion-proof valve 102 and a liquid injection hole 103. In this embodiment, the material of the compact 3 is aluminum, the upper portion of the pole 2 is aluminum, and the lower portion is copper.

Sealing washer 6 in this embodiment is made through acid and alkali-resistance, high temperature resistance elastic material, is provided with the through-hole in the middle of the sealing washer 6, and the shape of through-hole is the same with the shape of cylinder 201, during the equipment, exerts pressure through the tool and reaches sealed effect.

The assembly sequence of the top cover assembly of the present embodiment is:

s1, sleeving a sealing ring 6 on a column body 201 of the pole 2;

s2, placing the pole 2 sleeved with the sealing ring 6 and the lower plastic 5 at the lower part of the top cover plate 1, and enabling the pole 2 to penetrate through a first mounting hole 101 of the top cover plate 1;

s3, placing the upper plastic 4 and the pressing block 3 on the upper part of the top cover plate 1;

s4, applying pressure through a jig to enable all parts to be tightly attached, and connecting and fixing the pressing block 3 and the pole 2 through a laser welding process to enable the parts to be fixed;

and S5, placing the tab connecting sheet 7 at the bottom of the pole 2, and connecting and fixing the tab connecting sheet with the end cap 202 of the pole 2 through laser welding.

The present embodiment also provides a battery including the cap assembly of any one of the above embodiments. Because the top cap subassembly size precision is high, and the equipment degree of difficulty is low, and welding quality is good, consequently, the battery that includes this top cap subassembly is of high quality, and batch production is with low costs.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship based on what is shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive step, and these embodiments are all intended to fall within the scope of the present invention.

Claims

1. The utility model provides a top cap subassembly, includes top cap piece, utmost point post, briquetting, its characterized in that, be provided with first mounting hole on the top cap piece, the briquetting has relative first side and the second side that sets up, the second side with the top cap piece supports tightly, be provided with first recess on the first side, the tank bottom of first recess is provided with the second mounting hole, utmost point post runs through the second mounting hole with first mounting hole, the terminal surface edge of utmost point post is provided with round second recess, the second recess with first recess intercommunication forms the holding tank, utmost point post with the briquetting welding, the holding tank is arranged in holding the welding process fused material.

2. The header assembly of claim 1, wherein the groove walls of the first and/or second grooves are sloped, and the slot opening of the receiving groove has a dimension that is greater than a dimension of a groove bottom of the receiving groove.

3. The header assembly of claim 1, wherein the groove bottom of the first groove is flush with the groove bottom of the second groove.

4. The header assembly of claim 1, wherein the post comprises a post body and an end cap connected to each other, wherein the diameter of the end cap is larger than the diameter of the post body, the second groove is formed in the post body, a ring of first step surfaces is annularly arranged on the periphery of the post body, the first step surfaces are located outside the second mounting hole, and the first step surfaces block a gap between the post body and the second mounting hole.

5. The header assembly of claim 4, wherein the first stepped surface is sloped, an inner side of the first stepped surface is higher than an outer side of the first stepped surface, and an end of the second mounting hole proximate to the header sheet is provided with an orifice chamfer.

6. The header assembly of claim 1, wherein the post comprises a positive post and a negative post, the negative post is a composite post, and the negative post is stamped and formed.

7. The top cover assembly according to claim 1, wherein a side face, away from the pressing block, of the pole is concavely provided with a weight reduction groove.

8. The top cover assembly of claim 1, wherein the pole comprises a cylinder and an end cap which are connected, the diameter of the end cap is larger than that of the cylinder, the second groove is formed in the cylinder, a second step surface is formed in the end cap, the diameter of one end, far away from the cylinder, of the end cap is larger than that of one end, close to the cylinder, of the end cap, and one end, far away from the cylinder, of the end cap is inserted into a connecting hole of the tab connecting piece.

9. The top cap assembly of claim 1, wherein a third groove is disposed on the top cap piece, the first mounting hole is disposed at a bottom of the third groove, and an insulator is disposed between the top cap piece and the press block, a portion of the insulator being embedded in the third groove.

10. A battery comprising the cap assembly of any one of claims 1-9.