CN217788579U - Top cover assembly and battery - Google Patents

Abstract

The utility model discloses a top cap subassembly and battery, wherein the top cap subassembly is including the apron, utmost point post, first plastic part and second plastic part are established in the relative both sides of apron, utmost point post includes utmost point post body and establishes two curb plates at the relative both ends of utmost point post body, utmost point post body is the contained angle setting with the curb plate, first plastic part, apron and second plastic part all are provided with the through-hole, first plastic part, apron and second plastic part three's through-hole is corresponding and forms a set of punch combination, the curb plate passes the punch combination respectively and extends the one side that the second plastic part deviates from the apron, and support tightly after the curb plate is buckled and keep away from the side of apron at second plastic part. The utility model discloses a buckle two curb plates and weld the bending structure who forms end to end, the utmost point post of this structure not only can improve the antitorque ability of top cap subassembly, can also reduce top cap subassembly's spare part, reduce cost.

Description

Top cover assembly and battery

Technical Field

The utility model relates to a battery technology field especially relates to a top cap subassembly to and contain this top cap subassembly's battery.

Background

The lithium ion battery has the characteristics of high energy density, long cycle life, good charge-discharge rate performance and the like, and is widely applied.

The top cap subassembly adopts riveted structure usually as lithium ion battery's important part on the existing market, and riveted structure's top cap subassembly includes top cap piece, utmost point post, goes up the plastic, down plastic, riveting piece and sealing member, and wherein, utmost point post is cylindrical utmost point post, and utmost point post needs to pass through the welding after riveting with the riveting piece. Therefore, the top cover assembly has more parts, the cost is always high, and the torsion resistance of the top cover assembly is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: provided is a roof panel assembly which is simple in structure, can improve the torque resistance of the roof panel assembly, and is low in cost.

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

the first aspect provides a top cover assembly, including apron, utmost point post, first plastic part and second plastic part, first plastic part with second plastic part sets up respectively the relative both sides of apron, utmost point post includes utmost point post body and sets up two curb plates at the relative both ends of utmost point post body, utmost point post body with the curb plate is the contained angle setting, first plastic part the apron with second plastic part all is provided with the through-hole, first plastic part the apron with second plastic part three the through-hole is corresponding and forms a set of punch combination, the curb plate passes respectively the punch combination extends second plastic part deviates from the side of apron, just support tightly after the curb plate is buckled the second plastic part is kept away from the side of apron.

As a preferred scheme of the top cover assembly, a first buffer layer is convexly arranged on one side, away from the cover plate, of the second plastic part.

As a preferred scheme of top cap subassembly, first plastic part is kept away from one side of apron is provided with first boss, first boss with utmost point post body butt, first boss is provided with the holding tank, the holding tank is used for holding the part after the extrusion utmost point post body.

As a preferable scheme of the top cover assembly, a second buffer layer is convexly arranged at the bottom of the accommodating groove.

As a preferred scheme of top cap subassembly, utmost point post body with the curb plate forms the contained angle through buckling, the curb plate with the department of bending of utmost point post body is provided with the groove that subtracts, subtract the groove and be located utmost point post is close to one side of first plastic part.

As a preferable scheme of the top cover assembly, the two side plates abut against one side of the second plastic part, which is far away from the cover plate, side by side.

As a preferred scheme of top cap subassembly, one protrusion in second plastic part and the apron both is provided with spacing post, and another is provided with first spacing groove, spacing post is inserted and is established first spacing inslot.

As a preferred scheme of the top cover component, the pole comprises an anode pole and/or a cathode pole, the anode pole is made of aluminum metal, and the cathode pole is made of copper-aluminum composite metal.

As a top cap unit's a preferred scheme, top cap unit still includes first sealing member, first sealing member includes sealing member body and second boss, the apron is provided with the mounting groove, the through-hole of apron runs through the tank bottom of mounting groove, second boss butt is in the tank bottom of mounting groove, the sealing member body is inserted and is established in the through-hole of apron and cover are established the curb plate periphery.

In a second aspect, a battery is provided, which includes a casing, a battery core disposed in the casing, and the above cap assembly, where the casing is provided with an opening, and the cap assembly blocks the opening.

The utility model has the advantages that: utmost point post forms end to end's bending structure through buckling the welding back with two curb plates, utmost point post can be with first plastic part through bending structure, apron and second plastic part are assembled together closely, the utmost point post of this structure can restrict spare part on the top cap subassembly effectively and take place to twist reverse, improve top cap subassembly's torsional strength, and utmost point post need not to set up the riveting piece in the current top cap subassembly after bending and rivets and welds, can reduce top cap subassembly's spare part, reduce top cap subassembly's manufacturing cost.

Drawings

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

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

Fig. 2 is an exploded view of the top cover assembly according to the embodiment of the present invention.

Fig. 3 is a schematic structural view of the pole column of the embodiment of the present invention, which is bent once.

Fig. 4 is a schematic structural view illustrating the pre-assembly of the cap assembly according to the embodiment of the present invention.

Fig. 5 is a front view of the pole before being bent according to the embodiment of the present invention.

Fig. 6 is an enlarged view of fig. 5 at a.

Fig. 7 is a top view of the pole before being bent according to the embodiment of the present invention.

In the figure:

1. a cover plate; 11. a second through hole; 12. mounting grooves; 13. a liquid injection hole; 14. a second limit groove; 2. a pole column; 21. a pole body; 22. a side plate; 23. a material reducing groove; 24. a plate body; 25. an aluminum plate; 3. a first plastic part; 31. a first through hole; 32. a first boss; 33. accommodating a tank; 34. a second buffer layer; 4. a second plastic part; 41. a third through hole; 42. a first buffer layer; 5. a limiting column; 6. a first seal member; 61. a seal body; 62. a second boss; 63. and a fourth via.

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 of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of 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.

As shown in fig. 1 to 4, the utility model provides a pair of top cap subassembly, including apron 1, utmost point post 2, first plastic part 3 and second plastic part 4 set up the relative both sides at apron 1, utmost point post 2 includes utmost point post body 21 and two curb plates 22 of setting at the relative both ends of utmost point post body 21, curb plate 22 is the contained angle setting with utmost point post body 21, first plastic part 3, apron 1 and second plastic part 4 all are provided with the through-hole, the through-hole of first plastic part 3, the through-hole of apron 1 and second plastic part 4 is corresponding and forms a set of punch combination, in this embodiment, first plastic part 3 is provided with two first through-holes 31, it is provided with a second through-hole 11 to correspond every first through-hole 31 on apron 1, second plastic part 4 corresponds every second through-hole 11 and is provided with a third through-hole 41, just right first through-hole 31, second through-hole 11 and first punch combination form a set of side, two sets of side of apron 4 are bent and are kept away from tight plastic part 4 after two curb plates 22 extend to the second punch combination respectively. All parts of the top cover assembly can be tightly assembled together by bending the two side plates 22 to form a bending structure in an end-to-end connection mode through the pole 2; the pole 2 with the structure can effectively limit the torsion of parts on the top cover assembly, and improve the torsional strength of the top cover assembly; the terminal post 2 is not required to be provided with a riveting block in the existing top cover assembly, so that the parts of the top cover assembly can be reduced, and the manufacturing cost of the top cover assembly is reduced.

Illustratively, the pole 2 is bent and then welded. The two bent side plates 22 are laser welded to improve the structural strength of the pole 2, and further, all the parts of the top cover assembly can be tightly assembled together.

Further, the post 2 comprises an anode post and/or a cathode post, the anode post is made of aluminum metal, and the cathode post is made of copper-aluminum composite metal. Specifically, the anode pole is separately arranged on one cover plate 1, and the cathode pole is separately arranged on the other cover plate 1; or, the positive electrode post and the negative electrode post are both arranged on the same cover plate 1.

More specifically, the structure of the positive electrode post is the same as that of the negative electrode post, the side plate 22 of the negative electrode post is made of copper metal, and the post body 21 of the negative electrode post is made of aluminum metal or copper-aluminum composite metal. The pole 2 is welded with a pole lug of a battery cell through the side plate 22, a positive pole lug is made of aluminum metal, a negative pole lug is made of copper metal, due to the limitation of the prior art, different metals are difficult to weld through laser welding, and the positive pole lug is made of aluminum metal, so that the positive pole lug and the positive pole lug can be conveniently welded; because the post 2 made of copper metal is high in cost and heavy in weight, the negative electrode post is made of copper-aluminum composite metal, and the side plate 22 of the negative electrode post is made of copper metal, the cost and the weight of the negative electrode post can be reduced while the negative electrode post and the negative electrode tab are stably welded.

As shown in fig. 3 and 5, in this embodiment, the negative electrode terminal includes a copper plate and an aluminum plate 25, the copper plate includes a plate body 24 and side plates 22 located at two opposite ends of the plate body 24, one side of the plate body 24 departing from the bending direction of the side plates 22 is provided with the aluminum plate 25, the plate body 24 and the aluminum plate 25 are combined to form the terminal body 21, the two side plates 22 are bent once toward the same side of the plate body 24, and an included angle is formed between the terminal body 21 and the side plates 22, so that the terminal 2 forms a U-shaped structure.

Preferably, the included angle between the side plate 22 and the pole body 21 is a right angle.

Specifically, the aluminum plate 25 and the plate body 24 are fixed together by fusion casting.

Preferably, as shown in fig. 6, a material reducing groove 23 is provided at the connection between the side plate 22 and the plate body 24 and extends along the width direction of the copper plate, and the material reducing groove 23 is located at the side of the pole 2 close to the first plastic part 3. The copper can be bent along subtracting silo 23, reduces the degree of difficulty of bending to guarantee the size of bending of copper, subtract silo 23 moreover and can reduce the structural strength of copper, in order to reduce the power of bending.

Specifically, as shown in fig. 2 and 7, two curb plates 22 butt side by side in the one side that second plastic part 4 deviates from apron 1, to the relative side welding of two curb plates 22, after two curb plates 22 passed two sets of punch combination respectively and extended second plastic part 4 and deviate from the side of apron 1, bend two curb plates 22 twice, two curb plates 22 all keep away from one side of apron 1 butt side by side with second plastic part 4 after bending, two curb plates 22 are relative along length direction's a side, and to the relative side welded connection of two curb plates 22. According to the design, the two side plates 22 cannot be overlapped together, and the space occupied by the pole 2 can be reduced.

In other embodiments, it may also be designed that after bending, both the side plates 22 abut against one side of the second plastic part 4 away from the cover plate 1 side by side, and one side surfaces of the two side plates 22 in the width direction are opposite to each other, and are welded to opposite side edges of the two side plates 22.

Specifically, a first buffer layer 42 is convexly disposed on one side of the second plastic part 4 away from the cover plate 1. In the present embodiment, the first buffer layer 42 is a plurality of bumps disposed at intervals along the length direction of the second plastic part 4. The side plate 22 is bent under the action of external force and abuts against the second plastic part 4, and the second plastic part 4 is easily deformed and damaged due to excessive extrusion force. When the second plastic part 4 is extruded, the first buffer layer 42 can bear most of the extrusion force and deform, so that the buffer effect is achieved, the deformation and damage of the second plastic part 4 are reduced, and the structural strength of the second plastic part 4 is improved.

Further, one side of the first plastic part 3, which is far away from the cover plate 1, is provided with a first boss 32, the first boss 32 is abutted to the pole body 21, the first boss 32 is provided with an accommodating groove 33, and the accommodating groove 33 can accommodate the extruded part of the pole body 21. Utmost point post 2 need exert external force when bending and withhold utmost point post 2 and keep away from one side of first plastic part 3, through setting up first boss 32, can improve the structural strength of first plastic part 3, and first plastic part 3 is difficult for taking place to warp and damages, and first boss 32 is through setting up holding tank 33 in addition, and utmost point post body 21 can be towards taking place to warp in holding tank 33 under the effect of external force, and utmost point post 2 is inseparabler with the combination of first plastic part 3.

Preferably, the groove bottom of the receiving groove 33 is convexly provided with the second buffer layer 34, and the structure of the second buffer layer 34 is the same as that of the first buffer layer 42. Through setting up second buffer layer 34, the deflection that can cushion utmost point post body 21 improves the structural strength of first plastic part 3 to the extrusion of first plastic part 3.

In this embodiment, at least two limiting posts 5 are protruded from one side of the second plastic part 4 close to the cover plate 1, the cover plate 1 is correspondingly provided with a first limiting groove (not shown in the figure), and the limiting posts 5 can be inserted into the first limiting groove to limit the torsion between the second plastic part 4 and the cover plate 1, thereby improving the torsion resistance of the top cover assembly.

In other embodiments, the second plastic part 4 may also be provided with a first limiting groove, and the cover plate 1 is provided with a limiting post 5, and the limiting post 5 is inserted into the first limiting groove.

Specifically, one side of the cover plate 1 close to the first plastic part 3 is provided with a second limiting groove 14, the two second through holes 11 are located in the second limiting groove 14 and penetrate through the bottom of the second limiting groove 14, and the bottom of the first plastic part 3 is clamped in the second limiting groove 14. The second limiting groove 14 can limit the torsion between the first plastic part 3 and the cover plate 1, and further improve the torsion resistance of the top cover assembly.

In this embodiment, the top cover assembly further includes first sealing member 6, first sealing member 6 is the sealing washer, first sealing member 6 includes sealing member body 61 and second boss 62, apron 1 is provided with mounting groove 12, second through-hole 11 runs through the tank bottom of mounting groove 12, second boss 62 butt is at the tank bottom of mounting groove 12, sealing member body 61 inserts and establishes in second through-hole 11 and overlap the periphery at curb plate 22, so that first sealing member 6 can the butt between apron 1 and first plastic part 3, realize that the top cover assembly to seal. This design enables the first seal 6 to be arranged within the cover plate 1, further reducing the footprint of the first seal 6.

Specifically, the first sealing member 6 is clearance fitted to the mounting groove 12.

Specifically, the number of the first sealing elements 6 is two, each first sealing element 6 is provided with a fourth through hole 63, the fourth through hole 63 is opposite to the first through hole 31, the second through hole 11 and the third through hole 41 to form a group of hole groups, and the two side plates 22 can respectively penetrate through the two group of hole groups.

In this embodiment, the lid plate 1 is further provided with a liquid inlet 13, and the liquid inlet 13 is sealed by a second sealing member (not shown). The second seal can further ensure the sealing performance of the top cover assembly. The second sealing element is a sealing nail, and the sealing nail is a sealing nail in the prior art and is not described herein again.

The specific assembling method of the top cover assembly in this embodiment includes the steps of:

step S10, providing an unbent pole 2, arranging material reducing grooves 23 at two ends of the pole 2, and bending the pole 2 once along one side where the material reducing grooves 23 are located so that an included angle is formed between the pole body 21 and the two side plates 22;

step S20, respectively penetrating the two side plates 22 of the pole 2 through the two groups of holes from top to bottom to one side face, away from the cover plate 1, of the second plastic part 4, applying external force to enable the pole 2, the first plastic part 3, the first sealing part 6, the cover plate 1 and the second plastic part 4 to be abutted tightly, and pre-assembling;

step S30, applying external force again to make the part of the side plate 22 extending below the second plastic part 4 bend and flatten towards the inner side of the pole 2 for the second time, and then laser welding the two side plates 22. According to the method, after the pole 2 is bent and welded, the pole 2 can form a head-to-tail connection bending structure, and the first plastic part 3, the first sealing part 6, the cover plate 1 and the second plastic part 4 are tightly assembled together.

The utility model also provides a battery, including casing, the electric core of setting in the casing and above the top cap subassembly, the casing is provided with the opening, top cap subassembly shutoff opening. Use the utility model discloses a top cap subassembly, battery quality is good, and is with low costs moreover.

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 "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 present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated 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 is not to 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 effort, which would fall within the scope of the present invention.

Claims (10)

1. The utility model provides a top cap subassembly, includes apron, utmost point post, first plastic part and second plastic part, first plastic part with second plastic part sets up respectively the relative both sides of apron, a serial communication port, utmost point post includes utmost point post body and sets up two curb plates at the relative both ends of utmost point post body, utmost point post body with the curb plate is the contained angle setting, first plastic part the apron with second plastic part all is provided with the through-hole, first plastic part the apron with second plastic part three the through-hole is corresponding and forms a set of punch combination, the curb plate passes respectively the punch combination extends second plastic part deviates from the side of apron, just support tightly after the curb plate is buckled second plastic part is kept away from the side of apron.

2. The lid assembly of claim 1, wherein a first buffer layer protrudes from a side of the second plastic member away from the lid plate.

3. The top cap assembly of claim 1, wherein a first protrusion is disposed on a side of the first plastic component away from the cover plate, the first protrusion abuts against the post body, and the first protrusion is provided with a receiving groove for receiving the extruded portion of the post body.

4. The header assembly of claim 3, wherein the groove bottom of the receiving groove is convexly provided with a second cushioning layer.

5. The top cover assembly according to claim 1, wherein the post body and the side plate form an included angle by bending, a reducing groove is arranged at the bending position of the side plate and the post body, and the reducing groove is positioned on one side of the post close to the first plastic part.

6. The lid assembly of claim 1, wherein the two side panels abut side-by-side on a side of the second plastic facing away from the lid panel.

7. The top cap assembly according to claim 1, wherein one of the second plastic member and the cover plate is protruded with a first stopper post, and the other one of the second plastic member and the cover plate is protruded with a first stopper groove, and the stopper post is inserted into the first stopper groove.

8. The header assembly of claim 1, wherein the post comprises a positive post and/or a negative post, the positive post is made of aluminum metal, and the negative post is made of copper-aluminum composite metal.

9. The top cap assembly of any one of claims 1 to 8, further comprising a first sealing element, wherein the first sealing element comprises a sealing element body and a second boss, the cover plate is provided with a mounting groove, the through hole of the cover plate penetrates through the bottom of the mounting groove, the second boss abuts against the bottom of the mounting groove, and the sealing element body is inserted into the through hole of the cover plate and sleeved on the periphery of the side plate.

10. A battery comprising a casing and a cell disposed within the casing, the casing being provided with an opening, characterized by further comprising a cap assembly according to any one of claims 1 to 9, the cap assembly closing the opening.

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