CN219419419U - Top cap and contain its battery and electronic equipment - Google Patents

Abstract

The utility model provides a top cover, a battery and an electronic device comprising the top cover, wherein the top cover comprises a top cover plate and an electrode lead-out piece, the top cover plate is provided with an electrode lead-out piece through hole, the electrode lead-out piece is arranged in the electrode lead-out piece through hole, and the electrode lead-out piece comprises: a through-member including a flange portion provided on a peripheral side surface of the through-member facing the electrode assembly side, and a through-connecting portion extending outwardly from a surface of the through-connecting portion, the through-connecting portion being sealingly mounted in the electrode lead-out member through-hole; the connecting plate, the connecting plate is located the lamina tecti orientation electrode subassembly one side, be provided with the first accommodation hole that link up on the connecting plate, link up the connecting portion and wear to locate in the first accommodation hole, the flange portion is located on the connecting plate orientation electrode subassembly one side surface. The utility model improves the sealing performance of the through part relative to the connecting plate at the position, thereby improving the integral sealing performance of the top cover at the position of the electrode lead-out part.

Description

Top cap and contain its battery and electronic equipment

Technical Field

The utility model relates to the field of batteries, in particular to a top cover, a battery comprising the top cover and electronic equipment.

Background

The current shell battery core is connected with the electrode assembly by adopting a butterfly welding assembly structure at the top cover, and particularly, the pole on the top cover is electrically connected with the pole lug on the electrode assembly in a connecting plate switching mode. The connecting plate comprises a first connecting area and a second connecting area, the second connecting area is in welded connection with the electrode lug below, and the first connecting area and the electrode lug are integrally welded with the electrode post through the connecting plate after being assembled, so that the assembly of the top cover and the electrode assembly is completed. At present, the assembly process is complex, the connection strength of the connecting plate and the pole is poor, the connecting plate is easy to fall off relative to the pole, and heat generated in the welding process is easy to transfer to the pole sealing piece, so that the sealing effect of the pole is affected.

Disclosure of Invention

The utility model aims to overcome the defects that the connection strength between an electrode lead-out piece and a transfer piece in the prior art is poor and the sealing performance of a sealing piece is affected by heat generated by welding the transfer piece.

The utility model solves the technical problems by the following technical scheme:

the utility model provides a top cap, its includes lamina tecti and electrode extraction spare, be provided with electrode extraction spare through-hole on the lamina tecti, electrode extraction spare install in the electrode extraction spare through-hole, the electrode extraction spare includes:

a through-member including a flange portion and a through-connection portion, the through-connection portion being sealingly mounted in the electrode lead-out member through-hole, the flange portion being provided on a peripheral side surface of the through-connection portion facing the electrode assembly side, the flange portion extending outwardly at a surface of the through-connection portion;

the connecting plate, the connecting plate is located the lamina tecti orientation electrode subassembly one side, be provided with the first accommodation hole that link up on the connecting plate, link up the connecting portion and wear to locate in the first accommodation hole, the flange portion is located on the connecting plate orientation electrode subassembly one side surface.

In the electrode lead-out piece of the top cover, the through first accommodating hole is formed in the connecting plate, after the through connecting part in the through piece passes through the first accommodating hole, the through connecting part is positioned on the surface of the connecting plate facing one side of the electrode assembly through the flange part in the through piece, so that the through connecting part is positioned relative to the connecting plate, upward support is provided, the connecting plate is prevented from loosening relative to the through piece, the through piece and the connecting plate are always kept in contact, and reliable electric connection is ensured.

Meanwhile, the through part is positioned on the surface of one side of the connecting plate, facing the electrode assembly, through the flange part, so that the sealing performance of the through part relative to the connecting plate at the position can be improved, and the integral sealing performance of the top cover at the position of the electrode lead-out part is further improved.

Preferably, the electrode lead-out member is formed in a first sealing portion in a region where the penetrating member penetrates the connecting plate.

The sealing part is formed in a compound mode at the position of the region where the through part passes through the connecting plate, so that the sealing effect of the electrode lead-out part can be improved.

Preferably, the through piece and the connecting plate are compounded in a friction welding or brazing mode.

Compared with the combination by adopting other welding processes, the friction welding mode can further improve the connection strength of the through part relative to the connecting plate, and compared with the combination by adopting other welding processes, the welding mode has lower cost and better sealing effect of the through part relative to the connecting plate.

Preferably, the composite region of the through member and the connection plate includes at least a surface of the connection plate facing the electrode assembly.

By compositing the surface of the connecting plate facing to one side of the electrode assembly with the through member, the horizontal tensile strength of the electrode lead-out member at the position can be improved, so that the connecting plate is prevented from loosening relative to the through member under horizontal acting force.

Preferably, the top cover further comprises a sealing element, the sealing element is sleeved on the electrode lead-out element, and the electrode lead-out element is installed in the electrode lead-out element through hole in a sealing way through the sealing element;

the seal also extends between the web and the top cover plate and forms a second seal. The sealing element is extended between the connecting plate and the top cover plate to form a second sealing part, and the sealing element is pressed on the top cover plate by the connecting plate, so that the sealing performance of the electrode lead-out element at the position is improved.

Preferably, a gap between the through connection portion and the first accommodation hole is located within a projection coverage range of the second sealing portion along an axial direction of the electrode lead-out member.

The second sealing part covers the gap between the through connecting part and the first accommodating hole, so that the gap at the joint of the through part and the connecting plate is blocked, and the sealing performance of the electrode lead-out part at the joint is improved.

Preferably, the top cover further comprises an outer conductive member, the outer conductive member is located at one side of the top cover plate, which faces away from the electrode assembly, and an end portion, away from the flange portion, of the penetrating member is fixed to the outer conductive member.

The other end of the through part is fixed through the outer conductive part, and the two ends of the through part are limited through the outer conductive part and the connecting plate respectively, so that the electrode lead-out part is reliably connected and fixed relative to the top cover plate.

Preferably, the connection plate includes:

a first connection portion, the first accommodation hole being provided on the first connection portion;

the second connecting part is used for being electrically connected with the tab led out from the electrode assembly;

and the two ends of the transition connecting part are respectively connected with the second connecting part and the first connecting part.

The first connecting portion and the second connecting portion are connected through the transition connecting portion, so that the second connecting portion is relatively far away from the first connecting portion, the influence of welding on the second connecting portion at the first connecting portion can be reduced, and the influence of welding on the first connecting portion at the second connecting portion can be reduced.

Preferably, the end surface of the through connection part facing the electrode assembly has a groove.

By providing a recess there, the weight reduction objective can be achieved.

Preferably, the through connection part is in threaded connection with the first accommodating hole, and the groove shape of the groove is regular hexagon.

Through setting the shape of recess to regular hexagon, conveniently utilize other instruments and recess to dock, and then screw up through connecting portion through the instrument, make through connecting portion and the threaded connection of first accommodation hole.

Preferably, the flange portion is annular in shape.

The annular flange portion has a better effect in positioning the connection plate than the flange portion having another shape.

Preferably, the surface of the connecting plate facing one side of the electrode assembly is provided with a second accommodating hole coaxial with the first accommodating hole, the diameter of the second accommodating hole is larger than that of the first accommodating hole, the flange part is accommodated in the second accommodating hole, and the flange part is abutted with the bottom surface of the second accommodating hole.

The second accommodating hole is further formed in the surface, facing the electrode assembly, of the connecting plate to accommodate the flange portion, so that the positioning effect of the flange portion relative to the connecting plate is improved. Meanwhile, the contact area is further increased, so that the contact sealing effect of the two can be improved.

Preferably, the outer surface of the flange portion is flush with the surface of the connection plate facing the electrode assembly side.

The flange part is flush with the surface of the connecting plate, so that the whole thickness is further compressed on the premise of ensuring the contact area and the connecting effect of the through part and the connecting plate, and the space for storing energy of the power supply is improved.

A battery, comprising:

a housing;

the top cover is arranged on the shell and is used for limiting a containing cavity together with the shell;

and the battery cell is accommodated in the accommodating cavity and is connected with an electrode assembly.

In the battery, the electrode lead-out member of the top cover is provided with a first through-receiving hole through the connecting plate, so that after the through-connecting part in the through-member passes through the first receiving hole, the electrode lead-out member is positioned on the surface of the connecting plate facing the electrode assembly through the flange part in the through-member. The flange part of the through part is positioned relative to the connecting plate and provides upward support to prevent the connecting plate from loosening relative to the through part, so that the through part and the connecting plate are always in contact, and the battery is ensured to be electrically connected reliably at the lug of the top cover.

Meanwhile, the through part is positioned on the surface of one side of the connecting plate, facing the electrode assembly, through the flange part, so that the sealing performance of the through part relative to the connecting plate at the position can be improved, and the sealing performance of the whole battery at the electrode lead-out part of the top cover is further improved.

An electronic device comprising a battery as described above

The utility model has the positive progress effects that:

in the top cover, the battery and the electronic equipment comprising the top cover, the electrode lead-out piece of the top cover is provided with the through first accommodating hole on the connecting plate, after the through connecting part in the through piece passes through the first accommodating hole, the flange part in the through piece is positioned on the surface of one side of the connecting plate facing the electrode assembly, so that the flange part of the through piece is positioned relative to the connecting plate, and upward support is provided, the connecting plate is prevented from loosening relative to the through piece, the through piece and the connecting plate are always kept in contact, and reliable electric connection is ensured.

Meanwhile, the through part is positioned on the surface of one side of the connecting plate, facing the electrode assembly, through the flange part, so that the sealing performance of the through part relative to the connecting plate at the position can be improved, and the integral sealing performance of the top cover at the position of the electrode lead-out part is further improved.

Drawings

Fig. 1 is a schematic view of an exploded structure of a top cover according to embodiment 1 of the present utility model.

Fig. 2 is a schematic diagram showing the positional relationship of two electrode lead-out members according to embodiment 1 of the present utility model.

Fig. 3 is a bottom view of the top cover of embodiment 1 of the present utility model.

Fig. 4 is a schematic diagram showing the connection relationship between the electrode lead-out member and the connection plate according to embodiment 1 of the present utility model.

Fig. 5 is a cross-sectional view A-A of fig. 4.

Fig. 6 is a B-B cross-sectional view of fig. 3.

Fig. 7 is a schematic diagram showing the positional relationship between the second receiving hole and the flange portion in embodiment 2 of the present utility model.

Reference numerals illustrate:

top cover 100

Top cover plate 101

Seal 102

Electrode lead-out piece through hole 1011

Electrode lead-out member 1

First seal portion 11

Second seal portion 12

Through-piece 2

Flange portion 21

Through connection 22

Connecting plate 3

First accommodation hole 31

First connecting portion 32

Second connecting portion 33

Transition joint 34

Second accommodation hole 35

First insulating portion 41

Second insulating portion 42

Outer conductive member 5

Groove 6

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

Example 1

The embodiment provides an electronic device, which comprises a battery, wherein the battery comprises a shell, a top cover and a battery core. The top cover covers the top of the shell, and the top cover and the shell jointly define a containing cavity, the battery cell is contained in the containing cavity, and the battery cell is connected with the electrode assembly and is electrically connected with the electrode lead-out piece in the top cover.

Electronic devices include, but are not limited to: notebook computers, pen-input computers, mobile computers, electronic book players, portable telephones, portable fax machines, portable copiers, portable printers, headsets, video recorders, liquid crystal televisions, hand-held cleaners, portable CD-players, mini-compact discs, transceivers, electronic notebooks, calculators, memory cards, portable audio recorders, radios, stand-by power supplies, motors, automobiles, motorcycles, mopeds, bicycles, lighting fixtures, toys, game machines, watches, electric tools, flashlights, cameras, household large-sized storage batteries, energy storage or sodium ion capacitors, and the like.

Fig. 1, fig. 2 and fig. 3 are diagrams illustrating a top cover 100 according to the present utility model, where the top cover 100 includes a top cover plate 101 and two electrode lead-out members 1, the top cover plate 101 is in a rectangular structure, two electrode lead-out member through holes 1011 are provided at two ends of the top cover plate 101 in the length direction, the two electrode lead-out members 1 are respectively and hermetically mounted in the corresponding electrode lead-out member through holes 1011, specifically, as shown in fig. 6, an electrode assembly (not shown in the drawing) is disposed below the top cover 100, and the top cover 100 is electrically connected to a tab (not shown in the drawing) on the electrode assembly through the electrode lead-out members 1.

As shown in fig. 4, 5 and 6, in this embodiment, the electrode lead 1 specifically includes a through member 2 and a connection plate 3, and the electrode lead 1 is electrically connected to a tab on the electrode assembly through the connection plate 3 thereof.

Specifically, the through-member 2 includes a flange portion 21 and a through-connection portion 22, the through-connection portion 22 being sealingly mounted in the electrode lead-out member through-hole 1011, the flange portion 21 being provided on a peripheral side surface of the through-connection portion 22 facing the electrode assembly side (i.e., a lower end of the through-connection portion 22 in fig. 5), the flange portion 21 extending outwardly at the peripheral side surface of the through-connection portion 22;

the connection plate 3 is located on the inner side of the top cover plate 101, that is, the side of the top cover plate 101 facing the electrode assembly, the connection plate 3 is provided with a through first accommodating hole 31, the through connection part 22 penetrates into the first accommodating hole 31 and abuts against the surface of the connection plate 3 facing the electrode assembly from bottom to top through the flange part 21, so as to realize contact positioning relative to the connection plate 3.

Specifically, the flange portion 21 is connected with one end of the through connection portion 22 facing the electrode assembly, the through connection portion 22 is of a cylindrical structure, the connecting plate 3 is provided with a first accommodating hole 31 in a penetrating manner, the shape of the first accommodating hole 31 is matched with that of the through connection portion 22, the through connection portion 22 is arranged in the first accommodating hole 31 in a penetrating manner, the flange portion 21 is attached to one side of the connecting plate 3 facing the electrode assembly, the size of the flange portion 21 is larger than that of the first accommodating hole 31, the flange portion 21 extends from the peripheral side surface of the through connection portion 22, namely, the size of the flange portion 21 is larger than that of the through connection portion 22, so that after the through connection portion 22 penetrates into the first accommodating hole 31, the through connection member 2 is positioned on the surface of the connecting plate 3 facing one side of the electrode assembly through the flange portion 21, so that the position of the through connection member 2 relative to the connecting plate 3 is positioned, and loosening of the connecting plate 3 relative to the through member 2 is prevented. Further, the flange portion 21 provides the upward support of the through connection portion 22 along the vertical direction, so that the stability of the through connection portion 22 penetrating into the first accommodating hole 31 is improved, the contact area between the through connection portion 22 and the electrode assembly is increased by the flange portion 21, and the through piece 2 and the top cover plate 101 are not easy to skew after being connected.

The through-connection portion 22 is positioned with respect to the connection plate 3 by the flange portion 21, and the through-connection portion 22 is always kept in contact with the connection plate 3 in the connection direction when the electrode lead 1 is connected to the top cover plate 101, so that the through-connection portion 22 can ensure current to be always transmitted when the electrode assembly is electrically connected to the connection plate 3, and ensure reliable electrical connection.

In this embodiment, the through connection portion 22 is cylindrical, and the first accommodating hole 31 formed in the connection plate 3 is correspondingly formed as a circular hole, so that the processing is facilitated. Of course, in other embodiments, the through-connection portion 22 and the first accommodation hole 31 matched thereto may be provided in other shapes.

Meanwhile, the through-member 2 is positioned on the surface of the connection plate 3 facing the electrode assembly side through the flange portion 21, and the flange portion 21 is larger than the first receiving hole 31 due to its own size, so that the flange portion 21 can shield the first receiving hole 31 to improve the sealability of the through-member 2 with respect to the connection plate 3 at the place, thereby improving the overall sealability of the top cap 100 at the electrode lead-out member 1.

As shown in fig. 6, in the present embodiment, the electrode lead-out member 1 forms a first sealing portion 11 in a compound manner in a region where the penetrating member 2 penetrates the connection plate 3, the first sealing portion 11 being located in a region where the flange portion 21 contacts the connection plate 3 to close the region where the penetrating member 2 penetrates the connection plate 3. By forming the first sealing portion 11 in a manner of combining the both, the sealability of the electrode lead 1 when connected to the cap plate 101 can be improved, so that the sealing effect of the cap 100 can be correspondingly improved.

As shown in fig. 5, in this embodiment, the through member 2 and the connecting plate 3 are combined by friction welding, the friction welding is a welding manner in the prior art, and the connection strength of the through member 2 and the connecting plate 3 can be improved by friction welding, so that the through member 2 and the connecting plate 3 are more convenient to weld, and compared with welding in other manners, the welding seam is smaller by friction welding, the contact surface of the through member 2 and the connecting plate 3 after welding is smoother, that is, the contact surface area of the flange portion 21 and the connecting plate 3 is increased after the through connecting portion 22 penetrates into the first accommodating hole 31, the connection strength of the through member 2 and the connecting plate 3 is ensured, and the contact surface of the through member 2 and the connecting plate 3 is smooth, so that the sealing performance of the first sealing portion 11 can be further improved.

In other embodiments, the through member 2 and the connecting plate 3 may be further compounded by adopting a brazing manner, wherein the brazing manner is a welding manner in the prior art, and the welding cost of the brazing manner is low, so that the processing and manufacturing cost of the top cover 100 can be reduced; secondly, welding is carried out in a brazing mode, the joint between the heated welding material and the through connection part 22 and the connecting plate 3 is filled, and under the condition that the through connection part 22 or the connecting plate 3 is not heated to a melting point, namely, the welding is carried out under the condition that the stress of the through piece 2 and the connecting plate 3 is not changed, so that the self stress of the through piece 2 or the connecting plate 3 is not changed; finally, the welding is performed in the brazing direction, so that the welding position of the through connection part 22 and the connecting plate 3 is filled with the melted welding material, and the sealing performance of the welding position of the through piece 2 and the connecting plate 3 is better.

Referring back to fig. 5, the composite area of the through member 2 and the connecting plate 3 in the present embodiment includes a surface of the flange portion 21 contacting the connecting plate 3 and a gap between the through connection portion 22 and the connecting plate 3, a surface of the connecting plate 3 facing the electrode assembly contacts an upper surface of the flange portion 21 to form a first sealing portion 11, the first sealing portion 11 is formed by welding, and the welded surface of the flange portion 21 contacting the connecting plate 3 positions the through member 2 relative to the connecting plate 3 in a horizontal direction, so as to improve the horizontal tensile strength of the electrode lead-out member 1 at the position, so as to avoid loosening of the connecting plate 3 relative to the through member 2 under horizontal force after the electrode lead-out member 1 is connected with the top cover plate 101, i.e. improve the connection stability of the through member 2 and the connecting plate 3 and improve the yield of the top cover 100.

Referring back to fig. 1 and 6, further, the top cover 100 further includes a sealing member 102, wherein the sealing member 102 is in a ring structure and is sleeved on the peripheral surface of the electrode lead-out member 1, and the sealing member 102 is disposed between the electrode lead-out member through hole 1011 and the electrode lead-out member 1 to seal the gap between the electrode lead-out member 1 and the electrode lead-out member through hole 1011 and insulate the electrode lead-out member 1 from the electrode lead-out member through hole 1011 at the place. The sealing member 102 is made of a material that can be used for sealing the electrode lead-out member 1 in the prior art, and the specific material selection is not described herein;

wherein the underside of the seal 102 also extends to the gap between the connection plate 3 and the top cover plate 101 and forms the second seal 12. Specifically, in the vertical direction, the top cover plate 101 and the connection plate 3 are stacked in order, wherein the surface of the connection plate 3 on the side away from the electrode assembly is in contact with the surface of the top cover plate 101 on the side facing the electrode assembly, and the through member 2 penetrating into the connection plate 3 extends into the electrode lead-out member through hole 1011 of the top cover plate 101, and the seal member 102 is sleeved on the through member 2 and seals the gap between the through member 2 and the electrode lead-out member through hole 1011 by the seal member 102. The sealing member 102 is inserted into the gap between the connection plate 3 and the top cover plate 101 toward the connection plate 3, so that the sealing member 102 inserted therein can be used to improve the sealing property thereof.

Specifically, when the top cover plate 101 is in contact with the connection plate 3, the connection plate 3 presses the seal member 102 against the top cover plate 101, improving the sealability of the electrode lead-out member 1 thereat.

In this embodiment, a first insulating portion 41 is further disposed between the top cover plate 101 and the connecting plate 3, the first insulating portion 41 is located on the outer peripheral side of the second sealing portion 12 and is used for isolating the electrical connection between the top cover plate 101 and the connecting plate 3, so that the risk of a short circuit of the top cover 100 is avoided, the reliability and safety of the top cover 100 are improved, and the first insulating portion 41 is formed by adopting an injection molding process in the prior art.

In addition, in the present embodiment, the gap between the through-connection portion 22 and the first accommodation hole 31 is located within the projection coverage of the second seal portion 12 in the axial direction of the electrode lead 1.

Specifically, the first sealing part 11 is disposed below the second sealing part 12 in the axial direction of the electrode lead 1 at a position relatively closer to the electrode assembly, the second sealing part 12 is for sealing the gap between the through-connection part 22 and the electrode lead through-hole 1011, and the first sealing part 11 is for sealing the region where the flange part 21 contacts the connection plate 3, so that the arrangement can further improve the sealability of the electrode lead at the top cap 100.

Referring back to fig. 6, the top cover 100 further includes an outer conductive member 5, where the outer conductive member 5 is located on a side of the top cover plate 101 away from the electrode assembly, and a flange is disposed at an end of the through member 2 away from the flange 21, for clamping a clamping portion correspondingly disposed on the outer conductive member 5, so as to realize installation and pre-positioning, facilitate fixing the two components in a composite manner, and avoid loosening. In addition, a second insulating portion 42 is also disposed between the outer conductive member 5 and the top cover plate 101, and the second insulating portion 42 is used for isolating the electrical connection between the top cover plate 101 and the outer conductive member 5, so as to avoid the risk of short circuit of the top cover 100 at the place, improve the reliability and safety of the top cover 100, and form the second insulating portion 42 by adopting an injection molding process in the prior art.

Of course, in other embodiments, the outer conductive member 5 may also be reliably fixed to the through connection 22 by using other fixing connection methods.

As shown in fig. 4, in the present embodiment, the connection board 3 is a planar board, and specifically includes a first connection portion 32, a second connection portion 33, and a transition connection portion 34.

Wherein, the first accommodating hole 31 is arranged on the first connecting portion 32 for realizing connection positioning and compound connection with the flange portion 21 and the through connection portion 22;

the second connection part 33 is arranged at the distal end of the electrode lead-out member connection part 32 and is used for being electrically connected with the tab led out by the electrode assembly;

and the two ends of the transition connecting part 34 are respectively used for connecting the second connecting part 33 and the electrode lead-out piece connecting part 32, so that the second connecting part 33 and the electrode lead-out piece connecting part 32 keep a distance, the influence of welding at the electrode lead-out piece connecting part 32 on the second connecting part 33 can be reduced, and the influence of welding at the second connecting part 33 on the electrode lead-out piece connecting part 32 can be reduced.

In addition, two second connection portions 33 are provided on the connection plate 3 in the present embodiment, and are respectively connected to the electrode lead-out member connection portions 32 through respective transition connection portions 34, so that the shape of the connection plate 3 is "Y" shaped.

Referring back to fig. 2 and 3, in the present embodiment, the end surface of the through connection portion 22 facing the electrode assembly has a groove 6, the size of the groove 6 is smaller than the size of the flange portion 21, and a space is kept between the groove 6 and the flange portion 21 to avoid reducing the connection strength between the flange portion 21 and the through connection portion 22, and by providing the groove 6 at the position, the weight of the through connection portion 22 is further reduced, so as to achieve the purpose of reducing the weight of the electrode lead-out member 1.

Further, the outer thread is provided on the peripheral side surface of the through connection portion 22, and the inner thread is correspondingly provided in the first accommodation hole 31, so that the through connection portion 22 is in threaded connection with the first accommodation hole 31, and the contact area and the connection strength of the two are improved. Meanwhile, the groove shape of the groove 6 is regular hexagon, and by setting the shape of the groove 6 to be regular hexagon, other tools are conveniently used for butt joint with the groove 6, and then the through connection part 22 is screwed by the tools, so that the threaded connection between the through connection part 22 and the first accommodating hole 31 is smoothly realized.

In another embodiment of the present embodiment, the recess 6 may also have other shapes matching those of the existing tool, so as to achieve the same purpose of screwing the through connection 22.

In this embodiment, the flange portion 21 is in a ring shape, and the flange portion 21 and the connecting plate 3 can be kept in uniform contact by the ring structure, so that the connection stability of the strip through connection portion 22 in the horizontal direction is improved, and the flange portion 21 in the ring structure has better positioning effect and more stable connection than the flange portion 21 in other shapes.

For the top cover 100 provided in this embodiment, the assembly sequence thereof may be as follows:

the through-member 2 and the connection plate 3 are assembled and combined (welded) to form the electrode lead-out member 1, wherein the first sealing portion 11 is formed at the combined position of the through-member 2 and the connection plate 3.

And a sealing member 102 is sleeved on the outer periphery side of the electrode lead-out member 1 and integrally mounted on the top cover plate 101, the body part of the sealing member 102 is positioned in the electrode lead-out member through hole 1011, so that the electrode lead-out member 1 is in sealing connection with the top cover plate 101, and the extending part of the sealing member 102 is clamped between the connecting plate 3 and the top cover plate 101 to form a second sealing part 12.

Thereafter, the outer conductive member 5 is mounted, and the outer conductive member 5 is compounded (welded) with the electrode lead-out member 1.

Finally, the first insulating portion 41 is injection-molded on the outer peripheral side of the second sealing portion 12 to keep the top cover plate 101 insulated from the connection plate 3, and the second insulating portion 42 is injection-molded on the outer peripheral side of the outer conductive member 5 to keep the outer conductive member 5 insulated from the top cover plate 101, to finally form the top cover 100.

The present embodiment also provides a battery cell, which includes the top cover 100 described above.

Specifically, the battery cell includes a battery cell stack and a top cap 100 located above the battery cell stack, wherein the electrode lead-out member 1 of the top cap 100 is provided with a through first accommodation hole 31 on the connection plate 3 thereof, so that the through connection portion 22 in the through member 2 penetrates into the first accommodation hole 31, the through connection portion 22 is positioned by the flange portion 21 of the through member 2, so that the flange portion 21 is always positioned on the surface of the connection plate 3 facing the electrode assembly side, the through member 2 is always kept in contact with the connection plate 3, and in addition, the flange portion 21 of the through member 2 is positioned relative to the connection plate 3, so that the through connection portion 22 has an upward supporting force, so that the loosening of the connection plate 3 relative to the through member 2 is prevented in the connection direction of the electrode lead-out member 1 and the top cap plate 101, and the electrical connection is ensured reliably under the condition that both the through member 2 and the connection plate 3 are always kept in contact.

Further, the through-member 2 is positioned on the surface of the connection plate 3 facing the electrode assembly side by the flange portion 21, so that the contact portion of the flange portion 21 with the connection plate 3 forms the first sealing portion 11, and the sealability of the through-member 2 with respect to the connection plate 3 is improved by the first sealing portion 11, thereby improving the overall sealability of the top cap 100 at the electrode lead-out member 1.

Example 2

As shown in fig. 7, in this embodiment, a top cover is provided, which is substantially the same in structure as the top cover in embodiment 1, except that: in the present embodiment, in the electrode lead-out of the top cover, the connection plate 3 extends toward the outer peripheral side of the flange portion 21 toward the side of the electrode assembly, so that the second accommodation hole 35 is formed at the side of the connection plate 3 toward the electrode assembly, the second accommodation hole 35 is disposed coaxially with the first accommodation hole 31, and the hole diameter of the second accommodation hole 35 is larger than that of the first accommodation hole 31.

The flange portion 21 is entirely accommodated in the second accommodation hole 35, and the upper surface of the flange portion 21 abuts against the hole bottom surface of the second accommodation hole 35. By means of the structural arrangement scheme, the contact area between the flange part 21 and the connecting plate 3 can be further increased, the connection stability of the through piece 2 and the connecting plate 3 is further improved, the positioning effect of the flange part 21 relative to the connecting plate 3 is also improved, and the tightness between the through piece 2 and the connecting plate 3 is further improved.

Further, the lower surface of the flange portion 21 is flush with the orifice surface of the second accommodation hole 35. By making the surface of the flange portion 21 facing the electrode assembly side flush with the surface of the connection plate 3 facing the electrode assembly side of the peripheral side extension portion of the flange portion 21, not only can it be ensured that the through member 2 and the connection plate 3 are always in contact and the contact area is correspondingly increased, but also the connection stability after the through member 2 and the connection plate 3 are connected can be improved. In addition, the structural arrangement scheme can also reduce the overall thickness of the connecting plate 3 along the vertical direction, so that the thickness along the connection direction of the electrode lead-out piece 1 and the top cover plate 101 is reduced, the space can be correspondingly increased on the connection direction of the electrode lead-out piece 1 and the top cover plate 101 by compressing the overall thickness, the space can be used for increasing the number of the electric cores to improve the energy storage of the electric cores, and further more durable electric cores for continuous voyage are provided between the same top cover 100 and the electric cores, so that the reasonable utilization rate of the space of the top cover 100 is improved.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (15)

1. The utility model provides a top cap, its includes lamina tecti and electrode extraction spare, be provided with electrode extraction spare through-hole on the lamina tecti, electrode extraction spare install in the electrode extraction spare through-hole, its characterized in that, electrode extraction spare includes:

a through-member including a flange portion and a through-connection portion, the through-connection portion being sealingly mounted in the electrode lead-out member through-hole, the flange portion being provided on a peripheral side surface of the through-connection portion facing the electrode assembly side, the flange portion extending outwardly at a surface of the through-connection portion;

the connecting plate, the connecting plate is located the lamina tecti orientation electrode subassembly one side, be provided with the first accommodation hole that link up on the connecting plate, link up the connecting portion and wear to locate in the first accommodation hole, the flange portion is located on the connecting plate orientation electrode subassembly one side surface.

2. The top cover according to claim 1, wherein the electrode lead-out member is combined to form a first seal portion in a region where the penetrating member penetrates the connecting plate.

3. The header of claim 2, wherein the pass-through member is composited with the connecting plate by friction welding or brazing.

4. The top cap of claim 2, wherein the composite region of the through-member and the connection plate includes at least a surface of the connection plate facing the electrode assembly side.

5. The top cover according to claim 1, further comprising a sealing member, wherein the sealing member is sleeved on the electrode lead-out member, and the electrode lead-out member is hermetically installed in the electrode lead-out member through hole through the sealing member;

the seal also extends between the web and the top cover plate and forms a second seal.

6. The top cap according to claim 5, wherein a gap between the through-connection portion and the first accommodation hole is located within a projection coverage area of the second sealing portion in an axial direction of the electrode lead-out member.

7. The top cap of claim 1, further comprising an outer conductive member on a side of the top cap plate facing away from the electrode assembly, an end of the through member on a side facing away from the flange portion being fixed to the outer conductive member.

8. The header of claim 1, wherein the connection plate comprises:

a first connection portion, the first accommodation hole being provided on the first connection portion;

the second connecting part is used for being electrically connected with the tab led out from the electrode assembly;

and the two ends of the transition connecting part are respectively connected with the second connecting part and the first connecting part.

9. The top cap according to claim 1, wherein the through-connection portion has a groove on an end face facing the electrode assembly side.

10. The top cover according to claim 9, wherein the through connection portion is screw-coupled with the first receiving hole, and the groove shape of the groove is a regular hexagon.

11. The top cover of any one of claims 1-10, wherein the flange portion is annular in shape.

12. The top cap according to any one of claims 1 to 10, wherein a surface of the connection plate facing the electrode assembly side has a second receiving hole coaxial with the first receiving hole, the second receiving hole having a larger hole diameter than the first receiving hole, the flange portion being received in the second receiving hole, the flange portion abutting against a hole bottom surface of the second receiving hole.

13. The top cap of claim 12, wherein an outer surface of the flange portion is flush with a surface of the connection plate on a side facing the electrode assembly.

14. A battery, characterized in that it comprises:

a housing;

the top cover of any one of claims 1-13, being disposed over the housing and defining a receiving cavity with the housing;

and the battery cell is accommodated in the accommodating cavity and is connected with an electrode assembly.

15. An electronic device comprising the battery of claim 14.