CN220400731U - Top cap subassembly, battery monomer and consumer - Google Patents

Abstract

The application relates to a top cap subassembly, battery cell and consumer, this top cap subassembly includes: the device comprises a top cover, a current collecting disc and a pole, wherein the surface of the top cover is provided with a through hole, the current collecting disc is arranged at the bottom of the top cover, and the current collecting disc is provided with a protruding part; the pole is penetrated and arranged in the through hole, the cross section of the pole is T-shaped along the axial direction of the pole, and the radial diameter of at least one end of the pole is smaller than the radial diameter of the through hole. The bottom with protruding portion welding to depressed part can realize the connection of utmost point post and collecting tray, preparation protruding portion and depressed part compare in the preparation multichannel and bend, need not control angle, and the precision requirement is low, and the processing mode is simpler, and production efficiency is high.

Description

Top cap subassembly, battery monomer and consumer

Technical Field

The application relates to the technical field of batteries, in particular to a top cover assembly, a battery monomer and electric equipment.

Background

In the related battery technology, after the current collecting disc is welded with the tab, the current collecting disc is bent and then welded with the post. The processing of the bending current collecting disc needs to control the bending angle and the bending mode, the processing precision is influenced by the bending angle of the current collecting disc, the processing process is complex, the control precision is difficult, and the production efficiency of the battery is reduced.

Disclosure of Invention

Based on the above, it is necessary to control the bending angle and the bending mode according to the processing requirement of the bending current collecting disc, the processing precision is affected by the bending angle of the current collecting disc, the processing process is complicated, the control precision is difficult, and the production efficiency of the battery is reduced.

A cap assembly, the cap assembly comprising:

the surface of the top cover is provided with a through hole;

the collecting disc is arranged at the bottom of the top cover and is provided with a protruding part;

the pole is arranged in the through hole in a penetrating mode, the cross section of the pole is T-shaped along the axial direction of the pole, the radial diameter of at least one end of the pole is smaller than that of the through hole, the pole is provided with a concave portion, and the concave portion is welded with the convex portion.

In one embodiment, a through welding hole is formed in the bottom of the concave portion, and the protruding portion extends into the welding hole and abuts against the welding hole.

In one embodiment, the top cover assembly further comprises a lower plastic and a connecting piece, the pole is connected with the top cover at intervals through the lower plastic and the connecting piece, and the current collecting disc is connected with the top cover at intervals through the lower plastic.

In one embodiment, the lower plastic comprises a first isolation part and a second isolation part which are connected at an angle, wherein the first isolation part is arranged between the outer peripheral surface of the pole and the inner peripheral surface of the top cover, and the second isolation part is arranged between the bottom of the top cover and the top of the current collecting disc.

In one embodiment, the pole comprises a first connecting portion arranged at the periphery of the concave portion, the first connecting portion extends along the direction away from the concave portion, and the outer edge contour of the first connecting portion is located in the area defined by the outer edge contour of the through hole;

the top cover is provided with a second connecting part which extends towards the direction close to the concave part;

the connecting piece comprises insulating plastic, and the first connecting part passes through the insulating plastic to form ultrasonic welding with the second connecting part.

In one embodiment, the connecting piece further comprises a hot melt adhesive layer, a gap is formed between the pole and the inner peripheral surface of the top cover, and the hot melt adhesive layer is filled in the gap.

In one embodiment, the connecting member comprises an upper plastic and a sealing member, the pole comprises a first part and a second part which are overlapped, the first part is in limit fit with the top cover through the upper plastic, and the top cover, the upper plastic, the first part, the second part and the lower plastic are jointly configured to form a containing cavity, and the sealing member is located in the containing cavity.

In one embodiment, the second portion is provided with a lap joint portion, the lap joint portion extends along a direction away from the concave portion, the sealing member is stacked on the lap joint portion, one end of the lower plastic is stacked on the lap joint portion and is abutted to the sealing member, and the top cover is stacked on the sealing member and the lower plastic.

In a second aspect, embodiments of the present application also provide a battery cell including the top cap assembly of the first aspect.

In a third aspect, an embodiment of the present application further provides an electrical device, where the electrical device includes a battery cell according to the second aspect.

Above-mentioned top cap subassembly, the processing of bulge and depressed part compares in the processing of multichannel bending, need not control angle, and the precision requirement is low, and processing mode is simple, and production efficiency is high.

Drawings

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

Fig. 2 is a top view of a cap assembly according to a first embodiment of the present application.

Fig. 3 is a cross-sectional view taken along A-A in fig. 2.

Fig. 4 is an enlarged view at a in fig. 3.

Fig. 5 is a schematic perspective view of a top cover assembly according to a second embodiment of the present application.

Fig. 6 is a top view of a cap assembly according to a second embodiment of the present application.

Fig. 7 is a cross-sectional view taken along the direction B-B in fig. 6.

Fig. 8 is an enlarged view at B in fig. 7.

Fig. 9 is a schematic perspective view of a top cap assembly according to a third embodiment of the present application.

Fig. 10 is a top view of a cap assembly according to a third embodiment of the present application.

Fig. 11 is a cross-sectional view taken along the direction C-C in fig. 10.

Fig. 12 is an enlarged view at C in fig. 11.

Reference numerals illustrate: 100. a top cover assembly; 1. a pole; 11. a first connection portion; 12. a first portion; 13. a second portion; 13a, a lap joint; 14. a recessed portion; 14a, welding holes; 2. a collecting tray; 21. a protruding portion; 3. a top cover; 31. a through hole; 32. a second connecting portion; 4. lower plastic; 41. a first isolation part; 42. a second isolation part; 5. insulating plastic; 6. a hot melt adhesive layer; 7. applying plastic; 8. and a seal.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "outer", "inner", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

In the related battery technology, after the current collecting disc is welded with the tab, the current collecting disc is bent and then welded with the post. The processing of the bending current collecting disc needs to control the bending angle and the bending mode, the current collecting disc is processed into a specific shape, the processing process is complicated, the accuracy is difficult to control, and the production efficiency of the battery is reduced.

Based on this, this application embodiment provides a top cap subassembly 100, need not to bend current collecting tray 2 just can realize the connection of utmost point post 1 and current collecting tray 2, and the processing mode is simple, and the precision requirement is low, improves battery production efficiency. Referring to fig. 1, 5 and 9, fig. 1, 5 and 9 are schematic perspective views of a top cover assembly 100 according to three embodiments provided herein. The cap assembly 100 includes a cap 3, a current collecting plate 2, and a pole 1. Wherein, the surface of the top cover 3 is provided with a through hole 31; the collecting tray 2 is arranged at the bottom of the top cover 3, and the collecting tray 2 is provided with a protruding part 21; the pole 1 is arranged in the through hole 31 in a penetrating manner, the cross section of the pole 1 is T-shaped along the axial direction of the pole 1, the radial diameter of at least one end of the pole 1 is smaller than that of the through hole 31, the pole 1 is provided with a concave part 11, and the concave part 11 is welded with the convex part 21. Above-mentioned top cap subassembly 100 can realize the connection of utmost point post 1 and mass flow disk 2 with the bottom welding of bulge 21 to depressed part 11, makes bulge 21 and depressed part 11, compares in the preparation multichannel bending, need not control angle, and the precision requirement is low, and the processing mode is simpler, and production efficiency is high. In addition, the bending structure of the current collecting disc 2 complicates the internal structure of the battery, occupies the internal space and is easy to cause short circuit, and the arrangement of the concave part 11 and the convex part 21 can save the space in the height direction of the battery, so that the battery structure is compact.

Referring to fig. 3 and 7, fig. 3 and 7 are cross-sectional views of a first embodiment and a second embodiment of the present application. The radial diameter of the end of the pole 1 near the collecting plate 2 in the first and second embodiments is smaller than the radial diameter of the through hole 31 so that the pole 1 can be inserted into the through hole 31 from the upper surface of the top cover 3 (the surface of the side of the cap plate 3 away from the collecting plate 2). Referring to fig. 11, fig. 11 is a sectional view of a third embodiment of the present application, in which the radial diameter of the end of the pole 1 away from the collecting plate 2 is smaller than the radial diameter of the through hole 31, so that the pole 1 can be inserted into the through hole 31 from the lower surface of the top cover 3 (the surface of the cover plate 3 near the collecting plate 2). The utility model provides a utmost point post 1 can directly assemble to top cap 3, and utmost point post 1 need not the riveting and warp, can save the assembly process, further improves production efficiency.

In the axial direction of the pole 1, the bottom of the pole 1 is recessed upward to the inside thereof to form the recess 11, and the current collecting plate 2 is raised upward to form a projection 21 to be welded with the top end of the recess 11, in such a manner that the welding is required from the inside of the battery. Or the top of the pole 1 is downwardly recessed toward the inside thereof to form a recess 11, and the current collecting plate 2 is upwardly protruded to form a protrusion 21 to be welded with the bottom end of the recess 11, in such a manner that welding can be performed from the outside of the battery. The thickness of the pole 1 can be reduced by the processing mode of the concave part 11, the welding is convenient, the current collecting disc 2 is upwards protruded to be away from the battery core, and the influence on the internal structure of the battery such as the winding core in the welding process is reduced.

Preferably, please refer to fig. 2 and 3. The top of the pole 1 is downwardly recessed to the inside thereof to form a recess 11, and the current collecting plate 2 is upwardly protruded to form a protrusion 21 to be welded with the bottom end of the recess 11. The operation space is larger by welding from the outside of the battery. The bottom of the concave part 11 and the convex part 21 are melted at high temperature to form a molten pool in a penetration welding mode, and the depth of the molten pool can be ensured after melting due to the fact that the contact part between the bottom of the concave part 11 and the convex part 21 has a certain thickness, so that the joint strength of a welding seam is increased, and the joint strength of the pole 1 and the current collecting disc 2 is improved.

Further preferably, referring to fig. 6 and 7, fig. 10 and 11, fig. 6 is a top view of the top cover assembly 100 according to the second embodiment provided in the present application, and fig. 7 is a cross-sectional view along the direction B-B of fig. 6. Fig. 10 is a top view of a top cap assembly 100 according to a third embodiment of the present application, and fig. 11 is a cross-sectional view taken along the direction C-C in fig. 10. In order to further reduce the thickness of the pole 1, the bottom of the recess 11 is provided with a through welding hole 11a, and the projection 21 extends into the welding hole 11a and abuts against the welding hole 11 a. The welding mode of seam welding can be adopted for welding, the contact area of an electrode of the seam welding is small, high current density and heat are generated through the local action of current, and therefore the joint of the welding convex part 21 and the edge of the welding hole 11a can be welded, and a continuous sealed welding seam is formed at the joint, so that the welding strength of the pole 1 and the current collecting disc 2 is ensured.

In some embodiments, to achieve insulation between the current collecting plate 2, the pole 1 and the top cover 3, and prevent the current collecting plate 2, the pole 1 and the top cover 3 from being electrically contacted to cause a short circuit, the top cover assembly 100 further includes a lower plastic 4, the pole 1 is connected to the top cover 3 at intervals through the lower plastic 4, and the current collecting plate 2 is connected to the top cover 3 at intervals through the lower plastic 4.

In some embodiments, referring to fig. 3 and fig. 7, in the first embodiment and the second embodiment, a setting manner of the lower plastic 4 is provided: the lower plastic 4 includes a first partition 41 and a second partition 42 connected at an angle, the first partition 41 is disposed between the outer circumferential surface of the pole 1 and the inner circumferential surface of the top cover 3, and the second partition 42 is disposed between the bottom of the top cover 3 and the top of the current collecting tray 2. The first isolation part 41 separates the top cover 3 of the outer periphery of the pole 1 and the pole 1 to the left side and the right side, and the second isolation part 42 separates the top cover 3 and the current collecting disc 2 to the upper side and the lower side, so that the space utilization rate of the battery can be improved, the space of the battery can be effectively utilized, and the battery structure is more compact.

Referring to fig. 11, a third embodiment provides another arrangement mode of the lower plastic 4: the pole 1 comprises a first part 12 and a second part 13 which are superposed, i.e. the second part 13 is located at the bottom of the first part 12, the second part 13 being connected to the top cover 3 at intervals by means of a lower plastic 4. The terminal 1 in this application embodiment can be copper aluminium composite terminal 1, and first part 12 is aluminium promptly, and second part 13 is copper, and accessible concave-convex structure block is connected between first part 12 and the second part 13, and aluminium can increase conductivity, and copper intensity is high, can bear battery internal pressure, improves the security. In some embodiments, the second portion 13 is provided with a bridging portion 13a, and the bridging portion 13a extends in a direction away from the recess 11, so as to increase the contact area with the lower plastic 4, thereby increasing the insulation area. One end of the lower plastic 4 is overlapped with the overlap portion 13a, and the top cover 3 is overlapped with the lower plastic 4. Thereby, the second portion 13 of the pole 1 and the top cover 3 can be separated on both upper and lower sides of the lower plastic 4. The specific shape of the lower plastic 4 is not limited, and the arrangement of the lower plastic 4 is not limited. The lower plastic 4 in the embodiment of the present application is formed by molding an injection molding material.

Optionally, in the first, second and third embodiments shown in fig. 3, 7 and 11, one or more protruding structures are provided at the bottom of the lower plastic 4, and the protruding structures keep the space between the current collecting tray 2 and the top cover 3, so that the lower plastic 4 can be thinned.

Further, the top cover assembly 100 according to the embodiment of the present application further includes a connecting member 5, and the connecting member 5 can perform sealing, insulation, fixing, etc.

Referring to fig. 3 and 7, the connecting piece 5 in the first embodiment and the second embodiment further includes insulating plastic 5. In some embodiments, the pole 1 may be connected to the top cover 3 by ultrasonic welding of insulating plastic 5. The pole 1 includes a first connection portion 11 provided at the outer periphery of the recess portion 11, the first connection portion 11 extending in a direction away from the recess portion 11, the provision of the first connection portion 11 enabling an increase in the fixing area, the outer edge profile of the first connection portion 11 being located within the area defined by the outer edge profile of the through hole 31. The top cover 3 is provided with the second connecting portion 32, and the second connecting portion 32 extends in a direction approaching the recess 11, and the fixing area can be increased by providing the second connecting portion 32. The first connection portion 11 is ultrasonically welded to the second connection portion 32 through the insulating plastic 5. Through the high-frequency vibration energy of ultrasonic wave, with the quick friction heating of insulating plastic 5 between first connecting portion 11 and the second connecting portion 32, the atom of first connecting portion 11 and second connecting portion 32 and insulating plastic 5 contact surface collides under the vibration of ultrasonic wave and fuses, forms inseparable joint, and ultrasonic welding vibration frequency is high, and energy density is big, can realize quick weld, improves machining efficiency.

Optionally, the first connecting portion 11 and the second connecting portion 32 may be provided with a protrusion or a groove, and the corresponding insulating plastic 5 may also be provided with a groove or a protrusion to implement the clamping connection with the first connecting portion 11 and the second connecting portion 32, so that the contact area between the first connecting portion 11, the second connecting portion 32 and the insulating plastic 5 can be increased, the welding strength is improved, and the fixing strength is improved.

With continued reference to fig. 3 and 7, the connecting piece of the first embodiment and the second embodiment further includes a hot melt adhesive layer 6, and the hot melt adhesive layer 6 is provided to enhance the connection strength and insulation in the left-right direction of the pole 1 and the top cover 3, and to improve the sealing property and reduce dust by filling the gap.

Referring to fig. 11, the connector 5 of the third embodiment includes a seal 8. In some embodiments, the top cover 3, the upper plastic 53, the first portion 12, the second portion 13, and the lower plastic 4 together define a receiving cavity in which the seal 8 is located. Providing the seal 8 can enhance sealability between the cap assemblies 100. The sealing member 8 may be a rubber ring, an adhesive layer, a sponge layer, or the like.

With continued reference to fig. 11, the connector 5 of the third embodiment further includes an upper plastic 7. In some embodiments, the connecting piece 5 may be an upper plastic 7, and the pole 1 may be insulated and clamped with the top cover 3 by the upper plastic 7. The first part 12 of the pole 1 is in limit fit with the top cover 3 through the upper plastic 7. In one arrangement, the upper plastic 7 is provided with two engagement portions, the inner periphery of the top cover 3 being in a positive fit with one of the engagement portions, and the outer periphery of the first portion 12 of the pole 1 being in a positive fit with the other engagement portion. The joint of the clamping part can be a right angle or an obtuse angle. In another arrangement, the upper plastic 7 may be provided with a protrusion or a groove, and the outer circumference of the first portion 12 of the pole 1 may be provided with a groove or a protrusion, and the inner circumference of the top cover 3 may be provided with a groove or a protrusion, and the protrusion and the groove are clamped, so that the first portion 12 of the pole 1 is fixed with the top cover 3 through the upper plastic 7.

In a second aspect, the present application also provides a battery cell, which may be a cylindrical battery, a square hard-shell battery, or the like. The battery cell includes the cap assembly 100 as in the first aspect. The battery cell further includes a housing having an accommodating chamber with an opening communicating with an external space, and a battery cell provided in the accommodating chamber, wherein the top cap assembly 100 is connected to the housing and closes the opening. It can be appreciated that the battery cell has all of the technical effects of the top cap assembly 100 described above.

In a third aspect, the present application also provides an electrical device comprising the battery cell of the second aspect. The electric equipment can be applied to automobiles, industrial equipment (such as machine tools) or household equipment (such as air conditioners, televisions and the like) and the like, can be used as an operating power supply of the automobiles, the industrial equipment or the household equipment and the like, and is used for working power consumption requirements during starting and running of the automobiles, the industrial equipment or the household equipment and the like. It will be appreciated that the powered device has all of the technical effects of the cap assembly 100.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

It should be noted that, in order to facilitate understanding of the technical solutions of the present application, embodiments one, two and three are provided, but the technical solutions of the present application are not represented by the above three embodiments. The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A header assembly, the header assembly comprising:

the surface of the top cover is provided with a through hole;

the collecting disc is arranged at the bottom of the top cover and is provided with a protruding part;

the pole is arranged in the through hole in a penetrating mode, the cross section of the pole is T-shaped along the axial direction of the pole, the radial diameter of at least one end of the pole is smaller than that of the through hole, the pole is provided with a concave portion, and the concave portion is welded with the convex portion.

2. The header assembly of claim 1, wherein the bottom of the recess is provided with a through-going weld hole, and the projection extends into and abuts the weld hole.

3. The header assembly of claim 1, further comprising a lower plastic and a connector, wherein the post is connected to the header at intervals by the lower plastic and the connector, and wherein the current collecting tray is connected to the header at intervals by the lower plastic.

4. The header assembly of claim 3, wherein the lower plastic comprises first and second angularly connected spacers, the first spacer being disposed between the outer peripheral surface of the pole and the inner peripheral surface of the header, the second spacer being disposed between the bottom of the header and the top of the collector plate.

5. The cap assembly of claim 3, wherein the post includes a first connection portion disposed at an outer periphery of the recess, the first connection portion extending in a direction away from the recess, an outer edge profile of the first connection portion being located within an area defined by the outer edge profile of the through hole;

the top cover is provided with a second connecting part which extends towards the direction close to the concave part;

the connecting piece comprises insulating plastic, and the first connecting part passes through the insulating plastic to form ultrasonic welding with the second connecting part.

6. The cap assembly of claim 5, wherein the connection member further comprises a hot melt adhesive layer, the pole and the inner circumferential surface of the cap have a gap, and the hot melt adhesive layer fills the gap.

7. The cap assembly of claim 3, wherein the connector comprises an upper plastic and a seal, the post comprises a stacked first portion and a second portion, the first portion is in positive engagement with the cap by the upper plastic, the cap, the upper plastic, the first portion, the second portion, and the lower plastic together define a receiving cavity, and the seal is located in the receiving cavity.

8. The cap assembly of claim 7, wherein the second portion is provided with a lap joint portion extending in a direction away from the recess portion, the sealing member is stacked on the lap joint portion, one end of the lower plastic is stacked on the lap joint portion and abuts against the sealing member, and the cap is stacked on the sealing member and the lower plastic.

9. A battery cell comprising the cap assembly of any one of claims 1 to 8.

10. A powered device comprising the battery cell of claim 9.