CN216958263U

CN216958263U - Battery cover plate assembly, battery and battery pack

Info

Publication number: CN216958263U
Application number: CN202220659658.3U
Authority: CN
Inventors: 孙东升; 张勇杰; 蒋哲东; 李金成; 周勇
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-07-12
Anticipated expiration: 2032-03-23

Abstract

The utility model relates to the technical field of batteries, and provides a battery cover plate assembly, a battery and a battery pack. The battery cover plate assembly includes: the cover plate comprises an upper surface and a lower surface, and a liquid injection hole is formed in the cover plate; the explosion-proof valve is arranged on the cover plate; the insulating piece is positioned on the lower surface, one side of the insulating piece facing the lower surface is provided with a containing groove, a through hole is formed in the containing groove, and the part of the liquid injection hole is positioned in the containing groove so that the liquid injection hole is communicated with the through hole; wherein, be provided with the exhaust through-hole on the insulating part, the exhaust through-hole sets up with explosion-proof valve is relative, and the exhaust through-hole is linked together with the holding tank to can make electrolyte can realize annotating the liquid through the exhaust through-hole, with this improve annotate liquid efficiency, and can avoid the through-hole in the holding tank to block and can't annotate the problem of liquid, with this performance that improves battery cover plate subassembly.

Description

Battery cover plate assembly, battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly, a battery and a battery pack.

Background

In the related art, a liquid injection hole is formed in the battery cover plate assembly for injecting liquid into the battery. The battery cover plate assembly generally comprises a cover plate and an insulating part, and when electrolyte is injected, the electrolyte can not be injected into the battery in time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery cover plate assembly, a battery and a battery pack, which aim to improve the performance of the battery cover plate assembly.

According to a first aspect of the present invention, there is provided a battery cover plate assembly comprising:

the cover plate comprises an upper surface and a lower surface, and a liquid injection hole is formed in the cover plate;

the explosion-proof valve is arranged on the cover plate;

the insulating piece is positioned on the lower surface, one side of the insulating piece facing the lower surface is provided with a containing groove, a through hole is formed in the containing groove, and the part of the liquid injection hole is positioned in the containing groove so that the liquid injection hole is communicated with the through hole;

wherein, be provided with the exhaust through-hole on the insulating part, the exhaust through-hole sets up with explosion-proof valve is relative, and the exhaust through-hole is linked together with the holding tank.

The battery cover plate component comprises a cover plate, an explosion-proof valve and an insulating piece, wherein the explosion-proof valve is arranged on the cover plate, and the insulating piece is positioned on the lower surface of the cover plate. And be provided with on the apron and annotate the liquid hole to be provided with the holding tank on the insulating part, through be provided with the through-hole on the holding tank, thereby can be so that electrolyte can realize annotating the liquid through annotating liquid hole and through-hole, and be linked together through making the exhaust through-hole on the insulating part and holding tank, thereby can make electrolyte can realize annotating the liquid through exhaust through-hole, so as to improve and annotate liquid efficiency, and can avoid the through-hole in the holding tank to block and can't annotate the problem of liquid, so as to improve the performance of battery cover plate subassembly.

According to a second aspect of the present invention, there is provided a battery comprising the above battery cover plate assembly.

The battery comprises a battery cover plate assembly, wherein the battery cover plate assembly comprises a cover plate, an explosion-proof valve and an insulating piece, the explosion-proof valve is arranged on the cover plate, and the insulating piece is located on the lower surface of the cover plate. And be provided with on the apron and annotate the liquid hole to be provided with the holding tank on the insulating part, through be provided with the through-hole on the holding tank, thereby can be so that electrolyte can realize annotating the liquid through annotating liquid hole and through-hole, and be linked together through making the exhaust through-hole on the insulating part and holding tank, thereby can make electrolyte can realize annotating the liquid through exhaust through-hole, annotate liquid efficiency with this improvement, and can avoid the through-hole in the holding tank to block and can't annotate the problem of liquid, improve the performance of battery with this.

According to a third aspect of the present invention, there is provided a battery pack comprising the battery described above.

The battery pack comprises a battery, wherein the battery cover plate component of the battery comprises a cover plate, an explosion-proof valve and an insulating piece, the explosion-proof valve is arranged on the cover plate, and the insulating piece is positioned on the lower surface of the cover plate. And be provided with on the apron and annotate the liquid hole to be provided with the holding tank on the insulating part, through be provided with the through-hole on the holding tank, thereby can be so that electrolyte can realize annotating liquid through annotating liquid hole and through-hole, and be linked together through making the exhaust through-hole on the insulating part with the holding tank, thereby can make electrolyte can realize annotating liquid through the exhaust through-hole, annotate liquid efficiency with this improvement, and can avoid the through-hole in the holding tank to block and can't annotate the problem of liquid, improve the performance of group battery with this.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram illustrating the construction of a battery cover plate assembly according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a construction of an insulator of a battery cover plate assembly according to an exemplary embodiment;

FIG. 3 is a cross-sectional structural schematic view of a battery cover plate assembly shown in accordance with an exemplary embodiment;

FIG. 4 is another cross-sectional structural schematic view of a battery cover plate assembly according to an exemplary embodiment;

figure 5 is a partial schematic structural view of a pole assembly according to an exemplary embodiment;

FIG. 6 is a partial schematic structural view of a pole assembly according to another exemplary embodiment;

FIG. 7 is a schematic diagram of a battery according to an exemplary embodiment;

fig. 8 is an exploded view of a battery according to an exemplary embodiment.

The reference numerals are illustrated below:

10. a cover plate; 11. an upper surface; 12. a lower surface; 13. a liquid injection hole; 14. a boss portion; 20. an insulating member; 21. accommodating grooves; 211. a first through hole; 212. a second through hole; 22. an exhaust through hole; 23. avoiding the through hole; 24. a process tank; 241. an overflow through hole; 25. a channel; 26. a gas collection space; 30. an explosion-proof valve; 40. a pole assembly; 41. a pole column; 42. connecting sheets; 421. a pole connecting section; 422. a switching section; 423. a tab connection section; 43. a terminal; 50. a seal member; 60. a housing member; 70. an electric core; 71. a tab; 80. and (5) applying a plastic part.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery cover assembly, referring to fig. 1 to 4, the battery cover assembly including: the cover plate 10 comprises an upper surface 11 and a lower surface 12, and a liquid injection hole 13 is formed in the cover plate 10; the explosion-proof valve 30, the explosion-proof valve 30 is set in the cover plate 10; an insulating member 20, the insulating member 20 is positioned on the lower surface 12, one side of the insulating member 20 facing the lower surface 12 is provided with a containing groove 21, a through hole is arranged on the containing groove 21, and the part of the liquid injection hole 13 is positioned in the containing groove 21 so that the liquid injection hole 13 is communicated with the through hole; wherein, be provided with exhaust through-hole 22 on the insulating part 20, exhaust through-hole 22 sets up with explosion-proof valve 30 is relative, and exhaust through-hole 22 is linked together with holding tank 21.

The battery cover plate assembly of one embodiment of the present invention includes a cover plate 10, an explosion-proof valve 30 and an insulating member 20, wherein the explosion-proof valve 30 is disposed on the cover plate 10, and the insulating member 20 is disposed on a lower surface 12 of the cover plate 10. And be provided with on the apron 10 and annotate liquid hole 13 to be provided with holding tank 21 on the insulating part 20, through be provided with the through-hole on holding tank 21, thereby can make electrolyte can realize annotating liquid through annotating liquid hole 13 and through-hole, and through making exhaust through-hole 22 on the insulating part 20 be linked together with holding tank 21, thereby can make electrolyte can realize annotating liquid through exhaust through-hole 22, with this improvement annotate liquid efficiency, and can avoid the through-hole in the holding tank 21 to block and can't annotate the problem of liquid, with this performance that improves the board subassembly battery cover.

It should be noted that the cover plate 10 includes an upper surface 11 and a lower surface 12, the upper surface 11 and the lower surface 12 are oppositely disposed, the upper surface 11 is an outer surface of the cover plate 10, and the lower surface 12 is an inner surface of the cover plate 10. The injection hole 13 penetrates the upper surface 11 and the lower surface 12, and correspondingly, the through hole of the insulating member 20 penetrates the insulating member 20, so that the injection hole 13 is communicated with the through hole, thereby realizing the injection of the electrolyte. And the through-hole on insulating part 20 does not get rid of and appears blocking scheduling problem, is linked together through making exhaust through-hole 22 on insulating part 20 and holding tank 21 to can make electrolyte can realize annotating liquid through exhaust through-hole 22, thereby can avoid the through-hole in the holding tank 21 to block and can't annotate the problem of liquid.

And insulating part 20 is provided with holding tank 21 towards one side of lower surface 12, be provided with the through-hole on the holding tank 21, the part of annotating liquid hole 13 is located holding tank 21, annotate liquid hole 13 promptly and be linked together with the through-hole, and because the existence of holding tank 21 can make electrolyte have sufficient accommodation space, improve the injection efficiency of electrolyte, it is corresponding, because the existence of holding tank 21 does not get rid of the electrolyte that is located holding tank 21 and the overflow can appear, and exhaust through-hole 22 is linked together with holding tank 21 in this embodiment and cooperatees and can be on the basis of guaranteeing electrolyte injection efficiency, can avoid the corrosion problem that the electrolyte overflow brought.

Exhaust through hole 22 sets up with explosion-proof valve 30 relatively, and exhaust through hole 22 can realize the inside gaseous circulation of battery, and when battery internal pressure reached a certain degree, can break explosion-proof valve 30 and realize the pressure release to exhaust through hole 22 can realize the outflow of overflow electrolyte at electrolyte injection in-process, avoids appearing the gathering of electrolyte between apron 10 and the insulating part 20, thereby avoids electrolyte to corrode apron 10.

The mounting position and the specific structure of the explosion-proof valve 30 are not limited, and the explosion-proof valve 30 may be mounted on the upper surface 11 of the cover plate 10, or the explosion-proof valve 30 may be mounted inside the cover plate 10. The explosion-proof valve 30 may be an explosion-proof plate, an explosion-proof membrane, etc., and is not limited herein.

In one embodiment, as shown in fig. 2, the vent hole 22 is located outside the range of the accommodating groove 21, the insulating member 20 is provided with a channel 25, and the vent hole 22 is communicated with the accommodating groove 21 through the channel 25, so that the electrolyte in the accommodating groove 21 can also flow into the vent hole 22 through the channel 25 for filling.

It should be noted that, a part of the structure inside the battery may block the through holes on the receiving groove 21, for example, when the tab inside the battery is large, the tab easily covers the through holes on the receiving groove 21, and the exhaust through hole 22 is communicated with the receiving groove 21 through the channel 25, so that the electrolyte inside the receiving groove 21 can also flow into the exhaust through hole 22 through the channel 25 for filling, and the battery can conveniently extract negative pressure.

In one embodiment, as shown in fig. 2, the side of the insulating member 20 facing the lower surface 12 is provided with a gas collecting space 26, and the exhaust through holes 22 are located in the gas collecting space 26; the channel 25 communicates the gas collecting space 26 and the accommodating groove 21, so that the electrolyte overflowing into the accommodating groove 21 can flow into the gas collecting space 26 quickly, and the electrolyte is injected through the exhaust through hole 22 of the gas collecting space 26.

The gas collecting space 26 can effectively store the gas inside the battery, thereby facilitating the burst of the explosion-proof valve 30 and reliably protecting the battery.

In one embodiment, the cover plate 10 encloses the gas collecting space 26, so that gas can be reliably stored in the gas collecting space 26, thereby rapidly breaking the explosion-proof valve 30, releasing the pressure inside the battery, and avoiding causing the safety problem of the battery.

In one embodiment, as shown in fig. 2, the number of the exhaust through holes 22 is multiple, and the total area of the exhaust through holes 22 is larger than half of the area of the bottom wall of the gas collecting space 26, so that the gas can rapidly enter the gas collecting space 26 through the exhaust through holes 22 while ensuring the structure of the insulating member 20.

It should be noted that the area of the bottom wall of the gas collecting space 26 can be regarded as the total area surrounded by the circumferential edges of the bottom wall of the gas collecting space 26, and the exhaust through holes 22 have material removed from the interior thereof, and the material removed area is larger than the unremoved area, so that the total area of the exhaust through holes 22 is larger than half of the area of the bottom wall of the gas collecting space 26.

In some embodiments, the pour hole 13 may be a straight hole, i.e., the diameter of the pour hole 13 may be uniform.

In some embodiments, as shown in fig. 1 and fig. 3, the liquid injection hole 13 may be a stepped hole, which can prevent the electrolyte from overflowing greatly on the basis of ensuring the electrolyte injection efficiency.

In one embodiment, as shown in FIG. 3, the lower surface 12 is provided with a raised portion 14, the raised portion 14 forming a part of the pour hole 13; at least part of the projection 14 is located in the housing groove 21, so that part of the pour hole 13 is located in the housing groove 21, thereby improving the efficiency of pouring the electrolyte.

It should be noted that the protruding portion 14 may be a circular truncated cone structure, a large end of the circular truncated cone structure is connected to the lower surface 12, and a small end of the circular truncated cone structure is located in the receiving groove 21. The protrusion 14 may be formed by machining, the protrusion 14 may be formed by press forming, for example, the protrusion 14 may be formed when the pour hole 13 is formed by press forming, and the present invention is not limited thereto.

In one embodiment, the end of the protrusion 14 away from the lower surface 12 is spaced from the bottom wall of the accommodating groove 21, so that the electrolyte can flow into the accommodating groove 21 quickly, thereby achieving quick liquid injection through the through hole.

In an embodiment, the outer surface of bellying 14 and the cell wall interval setting of holding tank 21, bellying 14 can unsettled the setting in holding tank 21 promptly to on guaranteeing that electrolyte flows into the basis in holding tank 21 fast, can be so that holding tank 21's volume is great relatively, with this storage electrolyte, thereby improve the injection efficiency of electrolyte, avoid annotating the problem that the liquid in-process appearance outside blocked. The problem of hydrops overflow can appear in holding tank 21's existence, and holding tank 21 and exhaust through hole 22 cooperate in this embodiment can be on the basis of guaranteeing electrolyte injection efficiency, can avoid the corrosion problem that the electrolyte overflow brought.

In one embodiment, as shown in fig. 2 and 3, the through hole includes a first through hole 211, the first through hole 211 is disposed opposite to the liquid injection hole 13, and at least a portion of an orthographic projection of the liquid injection hole 13 on the accommodating groove 21 toward the port of the first through hole 211 coincides with the first through hole 211, so that most of the electrolyte discharged from the liquid injection hole 13 can directly flow into the first through hole 211, thereby achieving rapid liquid injection.

Referring to fig. 3, the port of the liquid injection hole 13 facing the first through hole 211 is a lower port of the liquid injection hole 13, and the area of the next port is smaller than the cross-sectional area of the first through hole 211, so that the capability of the electrolyte entering the first through hole 211 can be improved, and the efficiency of the electrolyte injection can be ensured.

In one embodiment, as shown in fig. 2, the through holes further include a plurality of second through holes 212, the plurality of second through holes 212 are disposed around the first through holes 211, so that after the electrolyte flows into the holding tank 21, the electrolyte can be quickly injected through the second through holes 212, and a large amount of overflow of the electrolyte can be avoided.

It should be noted that, the first through hole 211 may be a circular hole, and the second through hole 212 may be a strip-shaped hole, and a plurality of strip-shaped holes may be arranged around the circular hole at intervals, and a plurality of second through holes 212 may be evenly distributed in the circumferential direction of the first through hole 211.

In one embodiment, as shown in fig. 1 to 3, the battery cover plate assembly further includes a pole assembly 40, the pole assembly 40 is disposed on the cover plate 10, the insulating member 20 is provided with an avoiding through hole 23, and the pole assembly 40 is disposed through the avoiding through hole 23; wherein, be provided with overflow through hole 241 on insulating part 20, overflow through hole 241 sets up in dodging the one side that holding tank 21 was kept away from to through-hole 23, and overflow through hole 241 and dodge the distance between the through-hole 23 and be not more than the through-hole and dodge the distance between the through-hole 23 to can make the electrolyte that overflows in the holding tank 21 be difficult to flow utmost point post subassembly 40 department, even can flow utmost point post subassembly 40 department also can flow through overflow through hole 241 fast outflow, avoid corroding utmost point post subassembly 40.

It should be noted that the overflow through hole 241 may be disposed at an end of the insulating member 20 and may be disposed close to the pole assembly 40, so as to improve the outflow of the electrolyte near the pole assembly 40 and avoid corroding the pole assembly 40.

As shown in fig. 1 and 2, the pole assembly 40 may be two, i.e., a positive pole assembly and a negative pole assembly, and the corresponding relief through hole 23 may be two. Both end portions near the two pole assemblies 40 may be provided with overflow through holes 241.

The cover plate 10 and the insulating member 20 are not excluded from having a gap after installation, and may overflow during the electrolyte injection, and the electrolyte may overflow into the gap, which may cause a problem that the cover plate 10 is corroded by the electrolyte if not discharged in time. In the embodiment, the insulating member 20 is provided with the exhaust through hole 22 and the overflow through hole 241, so that the exhaust through hole 22 and the overflow through hole 241 are used for discharging the liquid between the cover plate 10 and the insulating member 20, thereby preventing the overflowing electrolyte from corroding the cover plate 10 during liquid injection.

In one embodiment, as shown in fig. 2, the insulating member 20 is provided with a process groove 24, and the overflow through hole 241 is located in the process groove 24; the overflow through holes 241 are plural, so as to improve the flowing efficiency of the overflow electrolyte, thereby improving the protection capability of the cover plate 10 and the pole assembly 40.

Insulating part 20 can be the injection molding, the both ends of insulating part 20 can have the bellying, the bellying can be used for the electric core or the hot melt Mylar membrane of location battery, consequently the bellying can be thicker, can establish technology groove 24 in order to prevent to shrink when insulating part 20 moulds plastics the drawing of patterns, the problem of hydrops can appear in technology groove 24, not only can flow out the liquid that deposits up through being provided with a plurality of overflow through-holes 241 in technology groove 24, and the convenient liquid that flows scurries to the gap department between insulating part 20 and the apron 10 flows out, thereby protection apron 10 and utmost point post subassembly 40 do not receive the corruption.

In one embodiment, as shown in fig. 5 and 6, the pole assembly 40 includes a pole 41 and a connecting piece 42, the pole 41 and the connecting piece 42 are integrally formed, the connecting piece 42 includes a pole connecting section 421, a switching section 422 and a pole ear connecting section 423, the pole 41 is disposed on the pole connecting section 421, and the pole ear connecting section 423 is used for connecting with a pole ear; wherein, utmost point post connecting segment 421 and utmost point ear connecting segment 423 are connected respectively to the opposite both ends of switching section 422 to avoid utmost point post connecting segment 421 and utmost point ear connecting segment 423 direct contact.

The pole assembly 40 comprises a pole 41 and a connecting sheet 42, and the pole 41 and the connecting sheet 42 are of an integrated molding structure, so that the process complexity can be reduced, and the structural strength can be ensured. And connection piece 42 includes utmost point post linkage segment 421, switching section 422 and utmost point ear linkage segment 423, utmost point post 41 sets up in utmost point post linkage segment 421, utmost point post linkage segment 421 and utmost point ear linkage segment 423 are connected respectively to switching section 422's relative both ends, in order to avoid utmost point post linkage segment 421 and utmost point ear linkage segment 423 direct contact, thereby in utmost point ear linkage segment 423 and utmost point ear welding process, can increase heat transfer to utmost point post 41's length, thereby can avoid haring the near structure of utmost point post 41, with this performance that improves battery cover plate subassembly.

It should be noted that, the opposite two ends of the adapting section 422 are respectively connected with the pole connecting section 421 and the tab connecting section 423, and the pole connecting section 421 and the tab connecting section 423 are respectively used for connecting the pole 41 and the tab, because the tab connecting section 423 and the tab welding process can generate a large amount of heat, at this time, considering that the tab connecting section 423 needs to be connected with the pole connecting section 421 through the adapting section 422, the path of heat transfer is relatively long, so that the probability of heat dissipation can be improved, thereby preventing a large amount of heat from being rapidly gathered to the pole 41, and damaging the structure near the pole 41, such as the sealing element 50.

In some embodiments, the connecting piece 42 includes a pole connecting section 421, a transition section 422, and a tab connecting section 423, and the connecting piece 42 may have a substantially S-shaped structure, that is, the pole connecting section 421 and the tab connecting section 423 may be respectively located on the upper side and the lower side of the transition section 422.

In some embodiments, orthographic projections of the pole connecting section 421 and the tab connecting section 423 on a plane perpendicular to the center line of the pole 41 are a first projection plane and a second projection plane respectively, and the first projection plane and the second projection plane are not coincident, that is, the pole connecting section 421 and the tab connecting section 423 may be located on the left side and the right side of the adapting section 422 respectively, so as to avoid rapid heat transfer, thereby increasing the safety performance of the battery cover plate assembly.

In one embodiment, the area of the second projection surface is not less than four fifths of the area of the first projection surface, so that a larger contact area between the tab connection section 423 and the tab is ensured, the overcurrent capacity between the tab connection section 423 and the tab is ensured, and the safety performance of the battery cover plate assembly is improved.

In one embodiment, the adapting segment 422 is a fusing structure, so that when the current in the battery is too large, the adapting segment 422 can be disconnected, thereby avoiding the safety problem of the battery and improving the safety performance of the battery.

In one embodiment, the transition segment 422 is formed with at least one of a notch, a groove, and a through hole, thereby increasing the possibility of the transition segment 422 being fused, and thus increasing the protection capability of the transition segment 422.

In one embodiment, as shown in FIG. 4, the tabs 42 are located below the insulator 20; wherein, insulating part 20 and changeover portion 422 joint to can make insulating part 20 and connection piece 42 have reliable connection ability, and insulating part 20 can the joint in breach, recess or the through-hole that changeover portion 422 formed, with this in changeover portion 422 by the back of fusing, insulating part 20 can play the effect of blockking, avoids the melt part that changeover portion 422 formed to appear the misconnection, with this security performance of guaranteeing the battery, provides the protect function of fusing structure.

In one embodiment, as shown in fig. 5, the thickness of the adapting section 422 is smaller than that of the pole connecting section 421, and the thickness of the adapting section 422 is smaller than that of the pole lug connecting section 423, so that the adapting section 422 can be ensured to be rapidly fused under a preset current, thereby performing a safety protection function.

In one embodiment, as shown in fig. 5 and fig. 6, the pole connecting section 421 is a first solid flat plate, and the tab connecting section 423 is a second solid flat plate, which can ensure not only the structural strength of the pole connecting section 421 and the tab connecting section 423, but also sufficient overcurrent capacity of both the pole connecting section 421 and the tab connecting section 423.

It should be noted that the solid flat plate is used herein to emphasize that the middle portion of the flat plate is not provided with a groove, a through hole, or other structures, i.e., the middle portion of the solid flat plate is not subjected to material removal.

In one embodiment, as shown in fig. 5, the connecting piece 42 includes a pole connecting section 421, an adapting section 422 and a pole connecting section 423, the adapting section 422 may be a fusing structure, and a through hole may be formed on the adapting section 422.

In one embodiment, as shown in fig. 6, the connecting plate 42 is a solid plate, and the connecting plate 42 does not particularly define the pole connecting section 421, the adapting section 422 and the tab connecting section 423, but can be separated into the pole connecting section 421, the adapting section 422 and the tab connecting section 423 according to the specific structure distribution and the connection with the pole 41 and the tab, compared to the connecting plate 42 in fig. 5, the connecting plate 42 in this embodiment has no through hole structure.

It should be noted that the pole assembly 40 can be two, i.e. a positive pole assembly and a negative pole assembly, and the positive pole assembly can include the connecting piece 42 shown in fig. 5, and the negative pole assembly can include the connecting piece 42 shown in fig. 6.

In one embodiment, as shown in fig. 4, the battery cover plate assembly further includes a sealing member 50, and the sealing member 50 is disposed between the cover plate 10 and the pole 41, so that the sealing performance between the cover plate 10 and the pole 41 is improved, and the cover plate 10 and the pole 41 can be insulated and protected. The connecting sheet 42 includes a terminal connecting section 421, a switching section 422 and a terminal connecting section 423, the terminal 41 is disposed on the terminal connecting section 421, the opposite ends of the switching section 422 are respectively connected to the terminal connecting section 421 and the terminal connecting section 423, and the sealing member 50 can be prevented from being damaged by increasing the heat transfer path.

The seal 50 may be a gasket.

In one embodiment, as shown in fig. 4, the battery cover plate assembly further includes an upper plastic member 80, the pole post assembly 40 further includes a terminal 43, the terminal 43 is disposed on the upper surface 11 of the cover plate 10, the pole post 41 is disposed through the terminal 43, and the upper plastic member 80 is disposed between the cover plate 10 and the terminal 43, so as to reliably insulate the cover plate 10 from the terminal 43.

An embodiment of the present invention further provides a battery, including the above battery cover plate assembly.

The battery of one embodiment of the present invention comprises a battery cover plate assembly, wherein the battery cover plate assembly comprises a cover plate 10, an explosion-proof valve 30 and an insulating member 20, the explosion-proof valve 30 is arranged on the cover plate 10, and the insulating member 20 is arranged on the lower surface 12 of the cover plate 10. And be provided with on the apron 10 and annotate liquid hole 13 to be provided with holding tank 21 on insulating part 20, through be provided with the through-hole on holding tank 21, thereby can make electrolyte can realize annotating liquid through annotating liquid hole 13 and through-hole, and be linked together through making exhaust through-hole 22 on insulating part 20 and holding tank 21, thereby can make electrolyte can realize annotating liquid through exhaust through-hole 22, so that improve annotate liquid efficiency, and can avoid the problem that the through-hole in the holding tank 21 blockked and can't annotate the liquid, with this performance that improves the battery.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

In one embodiment, as shown in fig. 7 and 8, the battery further includes: a housing member 60 to which the battery cover plate assembly is connected; the battery cell 70 is arranged between the battery cover plate assembly and the housing member 60, the battery cell 70 comprises a tab 71, and the tab 71 is welded with the tab connection section 423, so that the connection stability of the tab 71 and the tab connection section 423 is ensured.

The two tabs 71 can be a positive tab and a negative tab, the positive tab is connected with the positive pole assembly, and the negative tab is connected with the negative pole assembly. The two tabs may extend from one end of the battery cell 70, or the two tabs may extend from two opposite ends of the battery cell 70.

An embodiment of the utility model also provides a battery pack comprising the battery.

The battery pack according to one embodiment of the present invention includes a battery, and a battery cover plate assembly of the battery includes a cover plate 10, an explosion-proof valve 30, and an insulating member 20, wherein the explosion-proof valve 30 is disposed on the cover plate 10, and the insulating member 20 is disposed on a lower surface 12 of the cover plate 10. And be provided with on the apron 10 and annotate liquid hole 13 to be provided with holding tank 21 on insulating part 20, through be provided with the through-hole on holding tank 21, thereby can make electrolyte can realize annotating liquid through annotating liquid hole 13 and through-hole, and be linked together through making exhaust through-hole 22 on insulating part 20 and holding tank 21, thereby can make electrolyte can realize annotating liquid through exhaust through-hole 22, so that improve annotate liquid efficiency, and can avoid the problem that the through-hole in the holding tank 21 blockked and can't annotate the liquid, with this performance that improves the group battery.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery cover plate assembly, comprising:

the cover plate (10), the cover plate (10) includes an upper surface (11) and a lower surface (12), and the cover plate (10) is provided with a liquid injection hole (13);

the explosion-proof valve (30), the said explosion-proof valve (30) is set up in the said cover plate (10);

the insulating piece (20) is positioned on the lower surface (12), one side, facing the lower surface (12), of the insulating piece (20) is provided with a containing groove (21), a through hole is formed in the containing groove (21), and part of the liquid injection hole (13) is positioned in the containing groove (21) so that the liquid injection hole (13) is communicated with the through hole;

the insulation piece (20) is provided with an exhaust through hole (22), the exhaust through hole (22) is opposite to the explosion-proof valve (30), and the exhaust through hole (22) is communicated with the accommodating groove (21).

2. The battery cover plate assembly according to claim 1, wherein the venting through-hole (22) is located outside the receiving groove (21), a passage (25) is provided on the insulating member (20), and the venting through-hole (22) communicates with the receiving groove (21) through the passage (25).

3. The battery cover plate assembly according to claim 2, wherein a side of the insulating member (20) facing the lower surface (12) is provided with a gas collecting space (26), the gas discharge through-hole (22) being located in the gas collecting space (26);

wherein the channel (25) communicates the plenum (26) with the receiving groove (21).

4. The battery cover plate assembly according to claim 3, characterized in that the cover plate (10) encloses the gas collecting space (26).

5. The battery cover plate assembly according to claim 3, wherein the exhaust through holes (22) are plural, and the total area of the plural exhaust through holes (22) is larger than half of the area of the bottom wall of the gas collecting space (26).

6. The battery cover plate assembly according to any one of claims 1 to 5, wherein the lower surface (12) is provided with a raised portion (14), the raised portion (14) forming part of the pour hole (13);

wherein at least part of the protrusion (14) is located within the receiving groove (21).

7. The battery cover plate assembly according to claim 6, wherein an end of the protrusion (14) remote from the lower surface (12) is spaced from a bottom wall of the receiving groove (21).

8. The battery cover plate assembly according to any one of claims 1 to 5, wherein the through hole comprises a first through hole (211), the first through hole (211) is disposed opposite to the pour hole (13), and at least a portion of an orthographic projection of the pour hole (13) on the accommodation groove (21) toward an end of the first through hole (211) coincides with the first through hole (211).

9. The battery cover plate assembly according to claim 8, wherein the through-holes include a plurality of second through-holes (212), the plurality of second through-holes (212) being disposed around the first through-hole (211).

10. A battery comprising the battery cover plate assembly of any of claims 1-9.

11. A battery pack comprising the battery of claim 10.