CN218731341U - Battery cover plate assembly and battery - Google Patents

Abstract

The utility model relates to a battery technology field specifically provides a apron subassembly and battery of battery, aims at solving current battery because of leading to influencing the energy density of battery and making the problem of the inside short circuit of battery with utmost point ear setting in the casing. Therefore, the utility model discloses a battery includes casing, electric core subassembly, and the casing has the opening, and the opening part is located to apron subassembly lid, and the apron subassembly is including apron main part, utmost point post frame, connecting elements, sealing member, and the apron main part has first through-hole, is provided with on the utmost point post frame and holds chamber and second through-hole to utmost point ear extends to through the second through-hole and holds the intracavity, and utmost point ear is connected with the inner wall electricity that holds the chamber. The battery of the utility model can save the space of the folded tab inside the battery cell, improve the energy density of the battery and avoid causing the short circuit inside the battery; through setting up the utmost point post frame, regard as annotating the liquid hole with utmost point ear passageway, when annotating the liquid, hold the chamber and can play the water conservancy diversion effect to electrolyte, avoid producing the weeping, improve and annotate liquid efficiency.

Description

Cover plate assembly of battery and battery

Technical Field

The utility model relates to a battery technology field specifically provides a apron subassembly and battery of battery.

Background

With the development of electric vehicles, consumers pay more and more attention to the endurance and safety performance of electric vehicles, which are mainly dependent on power batteries. Therefore, the performance of the power battery directly influences the development of the electric vehicle.

The structure of square electric core at present is connected through utmost point ear inside electric core and the utmost point post on the apron, later carries out utmost point ear processing of bending, promotes the inside space utilization of electric core.

However, the folded tab still occupies a part of the space inside the battery cell, which has a certain influence on the energy density of the battery cell, and the energy density of the battery cell directly influences the endurance of the electric vehicle; meanwhile, in the tab folding process, part of tabs are inserted into the pole core, so that the positive and negative tabs are connected together, and the risk of internal short circuit is caused.

Therefore, there is a need in the art for a new solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving above-mentioned technical problem to a certain extent at least, promptly, solve current battery to a certain extent at least and lead to appearing influencing the energy density of battery and have the problem that makes the risk of the inside short circuit of battery owing to set up utmost point ear inside the casing.

In a first aspect, the present invention provides a cover plate assembly for a battery, the battery including a housing and an electrode assembly installed in the housing, the end of the electrode assembly being provided with an electrode tab, the housing facing the direction in which the electrode tab extends having an opening, the cover plate assembly covering the opening, the cover plate assembly including: the cover plate main body is provided with a first through hole so that the lug can penetrate through the first through hole and extend out of the shell when the cover plate main body is covered at the opening; the pole column frame is arranged on the cover plate main body and is in insulated connection with the cover plate main body, the pole column frame is provided with an accommodating cavity, a second through hole is formed in the pole column frame at a position corresponding to the first through hole, and the second through hole is communicated with the accommodating cavity so that the pole lug can extend into the accommodating cavity through the second through hole; a connecting member for connecting the pole post frame and the cover main body; the sealing component is arranged on the pole column frame and is matched with the accommodating cavity so as to seal the accommodating cavity; wherein the tab is electrically connected with the pole column frame and/or the sealing member.

In a preferred technical solution of the above cover plate assembly, the tab is electrically connected to the pole frame.

In the above preferred technical solution of the cover plate assembly, the post frame includes a post plate and an outer frame disposed on the post plate, the post plate is disposed on the cover plate main body and is connected to the cover plate main body in an insulating manner, the post plate and the outer frame enclose the accommodating cavity together, the second through hole is disposed on the post plate, and the tab extends into the accommodating cavity through the second through hole and is electrically connected to the post plate.

In the above-mentioned preferred technical scheme of apron subassembly, the connecting elements include with first through-hole with the cyclic annular barrel that the second through-hole suits and set up respectively first spacing portion and the second spacing portion at cyclic annular barrel both ends, cyclic annular barrel passes in proper order first through-hole with the second through-hole, under the condition of having installed, first spacing portion supports and leans on the utmost point post board, the spacing portion of second supports and leans on in the apron main part, the inside utmost point ear passageway that forms of cyclic annular barrel, utmost point ear passes utmost point ear passageway and extends to hold the intracavity.

In the preferable technical scheme of the cover plate assembly, the cover plate assembly further comprises a first sealing gasket and a second sealing gasket, the first sealing gasket is arranged between the first limiting part and the pole column plate, the second sealing gasket is arranged between the second limiting part and the cover plate main body, and under the condition of being installed, the first limiting part abuts against the first sealing gasket, and the second limiting part abuts against the second sealing gasket.

In a preferred embodiment of the cover plate assembly, the cover plate assembly further includes a first insulating member disposed between the cover plate main body and the pole column frame to connect the pole column frame to the cover plate main body in an insulating manner, and the first insulating member is provided with a third through hole at a position corresponding to the first through hole and the second through hole.

In a preferred technical solution of the cover plate assembly, the cover plate assembly further includes a second insulating member, the second insulating member is disposed on a side of the cover plate main body away from the pole column frame, the second insulating member is adapted to the opening, so that when the cover plate assembly covers the opening, the cover plate main body is in insulating connection with the battery cell, and the second insulating member is provided with a fourth through hole at a position corresponding to the first through hole.

In a second aspect, the present invention provides a battery, wherein the battery comprises the above-mentioned battery cover plate.

In the preferred technical scheme of above-mentioned battery, the electric core subassembly includes electric core main part and follows respectively first utmost point ear and the second utmost point ear that the both ends of electric core main part extend, the casing court the direction that first utmost point ear extends has first opening, the casing court the direction that the second utmost point ear extends has the second opening, the quantity of apron subassembly is two, two the apron subassembly is covered respectively and is located first opening with the second opening part, first utmost point ear with the second utmost point ear passes corresponding respectively first through-hole with the second through-hole and with corresponding utmost point post frame electricity is connected.

In a preferred technical solution of the above battery, the first tab and/or the second tab includes a main body portion and a bending portion, one end of the main body portion is connected to the electric core main body, the other end of the main body portion is connected to the bending portion, and after the first tab passes through the first through hole and the second through hole, the bending portion can be bent with respect to the main body portion to be electrically connected to the terminal frame.

Under the condition of adopting the technical scheme, the cover plate assembly is arranged at the opening of the shell, so that the tab can extend out of the shell and is connected with the pole frame outside the shell, the space for folding the tab inside the battery cell can be saved, the space utilization rate of the inside can be improved, the volume energy density of the battery cell can be improved, the risk of internal short circuit caused by the fact that part of the tab is inserted into the pole core when the tab is folded can be avoided, and the product yield and the safety performance can be improved; on the other hand, can be used for supplying the utmost point ear passageway that utmost point ear wore out in the casing as annotating the liquid hole, saved the process of trompil on the apron, improve production and assembly efficiency, simultaneously, through setting up the utmost point post frame for have in the utmost point post frame with the chamber that holds of second through-hole intercommunication, when annotating the liquid to the battery, can play the effect of water conservancy diversion to electrolyte, avoid producing the weeping, thereby improve and annotate liquid efficiency.

Further, the tab is arranged to be electrically connected with the pole frame, and compared with the tab arranged to be electrically connected with the sealing component, the tab and the pole frame are convenient to weld so that the tab and the pole frame are electrically connected, and therefore the production efficiency of the battery is improved.

Furthermore, the pole frame is arranged into the pole plate and the outer frame, so that on one hand, the pole lugs extending from the inside of the shell to the outside of the shell can be in contact with and electrically connected with the upper surface of the pole plate, the connection area of the pole lugs and the pole plate is increased, and the performance of the battery is improved; on the other hand, when annotating the liquid to the battery, the frame can cooperate with annotating the liquid frock, and the intracavity is held in the earlier injection of electrolyte, carries out the water conservancy diversion to electrolyte, makes electrolyte flow into inside the battery from second through-hole department smoothly again to improve and annotate liquid efficiency.

Furthermore, the connecting component is arranged in the form of the annular cylinder body and the first limiting part and the second limiting part which are arranged at the two ends of the annular cylinder body, so that on one hand, the connection between the cover plate main body and the pole frame can be realized through the connecting component, the assembly of the cover plate assembly is facilitated, and the assembly efficiency of the cover plate assembly is improved; on the other hand, can be through assembling the connecting member in order to realize being connected between apron main part and the utmost point post frame in first through-hole and the second through-hole, need not to set up the pilot hole on apron main part and utmost point post frame to the assembly of the connecting member of being convenient for improves the production efficiency of battery apron, simultaneously, when annotating the liquid to the battery, can make inside electrolyte flows into the casing through the utmost point ear passageway of the cyclic annular barrel inboard of connecting member, thereby avoid electrolyte to flow out and cause the weeping from the gap between utmost point post frame and the apron main part.

Still further, through setting up first sealed pad and second sealed pad, can seal between connecting element and apron main part, utmost point post frame, when annotating the battery, can prevent that electrolyte from flowing out from the gap between connecting element and first through-hole and the second through-hole, avoid the battery weeping.

Still further, through setting up the first insulating member, can make between the post frame and the apron main part insulation connection to make between post frame and the casing insulation connection, and then improve the security of battery, through set up the third through-hole on the first insulating member, can be convenient for wear out the outside of casing through first through-hole, second through-hole and third through-hole in proper order with utmost point ear, when annotating the liquid to the battery, the electrolyte that is convenient for pour into from the second through-hole can flow into the battery inside smoothly.

Furthermore, the cover plate main body and the electric core component can be in insulated connection by arranging the second insulating component, so that the cover plate main body and the shell are not electrified, and the influence on the safety of the battery caused by the electrification of the cover plate main body and the shell is avoided; meanwhile, the fourth through hole is formed in the second insulating component, so that the lug can conveniently extend out of the shell from the inside of the shell on the one hand, and electrolyte can be conveniently and smoothly injected into the shell when the battery is injected with the electrolyte on the other hand.

Furthermore, the utility model discloses the battery that further provides on above-mentioned technical scheme's basis, owing to adopted the battery apron of above-mentioned introduction, and then possessed the beneficial effect that above-mentioned battery apron possessed, compare in the battery before improving, the utility model discloses a higher, the yields of energy density and the security of battery are better, annotate liquid efficiency higher.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a first schematic structural diagram of a battery of the present invention;

fig. 2 is a schematic structural view of the electric core assembly of the present invention;

fig. 3 is a schematic view of an assembly structure of the battery of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural diagram ii of the battery of the present invention;

FIG. 6 is a partial enlarged view of the schematic cross-sectional structure taken along line B-B in FIG. 5;

fig. 7 is a schematic structural view of the connecting member of the present invention;

fig. 8 is a partial enlarged view of a portion a of fig. 3, showing the assembly of the cover plate assembly with the housing and the electric core assembly.

List of reference numbers:

1. a housing; 11. a first opening; 12. a second opening; 21. a cell main body; 22. a first tab; 221. a main body portion; 222. a bending part; 23. a second tab; 31. a cover plate main body; 311. a first through hole; 32. a pole frame; 320. an accommodating chamber; 321. a pole plate; 3211. a second through hole; 322. an outer frame; 33. a connecting member; 331. an annular cylinder; 3311. a tab passage; 332. a first limiting part; 333. a second limiting part; 34. a sealing member; 35. a first gasket; 36. a second gasket; 37. a first insulating member; 371. a third through hole; 38. a second insulating member; 381. a sheet-like insulating pad; 3811. a fourth via hole; 382. a cylindrical insulating pad.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that, in the description of the present invention, the terms "inner", "outer", "top", "bottom", "upper" and "lower" are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," and "connected" in the description of the present invention are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a battery of the present invention, fig. 2 is a schematic structural diagram of a battery cell assembly of the present invention, and fig. 3 is a schematic structural diagram of an assembly of a battery of the present invention.

As shown in fig. 1 to 3, the battery of the present invention includes a housing 1 and a battery cell assembly installed in the housing 1, wherein the end of the battery cell assembly is provided with a tab, the housing 1 has an opening toward the extending direction of the tab, and the cover plate assembly covers the opening.

It should be noted that, in practical application, those skilled in the art can set the electric core assembly to have the two ends all provided with the tab, correspondingly, the two ends of the casing 1 are all provided with the opening, the number of the cover plate assembly is two, two cover plate assemblies are respectively covered at two openings, or, one end of the electric core assembly can be set to have the tab, correspondingly, the one end of the casing 1 is provided with the opening, the number of the cover plate assembly is one, the cover plate assembly is covered at the opening, etc., the principle and range of the present invention can be flexibly adjusted and changed without deviating.

With continuing reference to fig. 2 and 3 and with continuing reference to fig. 4, fig. 4 is an enlarged view of a portion of fig. 3 at a.

Preferably, as shown in fig. 2 to 4, the electric core assembly of the present invention includes an electric core main body 21 and a first tab 22 and a second tab 23 respectively extending from two ends of the electric core main body 21, the first tab 22 and the second tab 23 respectively extend in opposite directions, the casing 1 has a first opening 11 in the direction in which the first tab 22 extends, the casing 1 has a second opening 12 in the direction in which the second tab 23 extends, the number of the cover plate assemblies is two, wherein the two cover plate assemblies are respectively disposed at the first opening 11 and the second opening 12, and the first tab 22 and the second tab 23 respectively extend out of the casing 1 from the first opening 11 and the second opening 12.

It should be noted that, in practical applications, those skilled in the art can set the core assembly to be the winding core assembly formed by winding, or can set the core assembly to be the lamination assembly formed by lamination, etc., and such adjustment and change of the specific structure type of the core assembly do not deviate from the principle and scope of the present invention, which should be included in the protection scope of the present invention.

It should be noted that, in practical applications, those skilled in the art can set the shape of the housing 1 and the electrical core assembly to be square, and accordingly, the shape of the cover plate assembly is also square, or can set the shape of the housing 1 and the electrical core assembly to be cylindrical, and accordingly, the shape of the cover plate assembly is also cylindrical, and so on, and such adjustment and change to the specific shape of the housing 1 and the cover plate assembly do not deviate from the principle and scope of the present invention, and all should be included in the protection scope of the present invention.

Preferably, as shown in fig. 1 to 3, the housing 1 and the electric core assembly are square in shape, and accordingly, the cover plate assembly is also square in shape, and the cover plate assembly is fitted to the opening.

The cover plate assembly covering the first opening is described in detail below as an example of the cover plate assembly of the present invention.

With continuing reference to fig. 3 and 4, and with continuing reference to fig. 5 and 6, fig. 5 is a second structural schematic diagram of the battery of the present invention, and fig. 6 is a cross-sectional structural schematic diagram along line B-B in fig. 5.

As shown in fig. 3 to 6, the cover plate assembly of the present invention includes a cover plate main body 31, a terminal post frame 32, a sealing member 34 and a connecting member 33 for connecting the cover plate main body 31 and the terminal post frame 32, wherein the cover plate main body 31 has a first through hole 311, so that when the cover plate main body 31 is covered at the first opening 11, the first tab 22 passes through the first through hole 311 and extends to the outside of the casing 1, the terminal post frame 32 is disposed on the cover plate main body 31 and is connected to the cover plate main body 31 in an insulating manner, the terminal post frame 32 has an accommodating cavity 320, the terminal post frame 32 is provided with a second through hole 3211 at a position corresponding to the first through hole 311, the second through hole 3211 is communicated with the accommodating cavity 320, so that the first tab 22 extending to the outside of the casing 1 extends into the accommodating cavity 320 through the second through hole 3211, the sealing member 34 is adapted to the accommodating cavity 320 to seal the accommodating cavity 320, and wherein the first tab 22 is electrically connected to the terminal post frame 32.

Through the arrangement, on one hand, the tabs can extend out of the shell 1 and are welded with the pole frame 32 outside the shell 1, so that the space for folding the tabs inside the battery cell can be saved, the space utilization rate inside the battery cell is improved, the energy density of the battery cell is improved, meanwhile, the risk of internal short circuit caused by the fact that part of the tabs are inserted into the pole core when the tabs are folded can be avoided, and the product yield and the safety performance are improved; on the other hand, will be used for supplying first through-hole 311 and the second through-hole 3211 that utmost point ear wore out from casing 1 in as annotating the liquid hole, saved the process of trompil on the apron, improve production and assembly efficiency, simultaneously, through setting up utmost point post frame 32, make have in the utmost point post frame 32 with the chamber 320 that holds of second through-hole 3211 intercommunication, when annotating liquid to the battery, make annotate liquid frock and utmost point post frame 32 and cooperate, can play the effect of water conservancy diversion to electrolyte, avoid producing the weeping, thereby improve and annotate liquid efficiency.

It should be noted that, in practical applications, the first tab 22 is not limited to be disposed to be electrically connected to the post frame 32, for example, the first tab 22 may also be disposed to be electrically connected to the sealing member 34, or the first tab 22 may also be disposed to be electrically connected to both the post frame 32 and the sealing member 34, and so on, and such flexible adjustment and change do not deviate from the principle and scope of the present invention, which should be included in the protection scope of the present invention.

Preferably, the first tab 22 is electrically connected with the pole frame 32.

With such an arrangement, compared with the form in which the first tab 22 is electrically connected to the sealing member, the form in which the first tab 22 is electrically connected to the post frame 32 can facilitate welding with the post frame 32 through the first tab 22 to achieve electrical connection between the first tab 22 and the post frame 32, thereby facilitating improvement of the production efficiency of the battery.

Preferably, as shown in fig. 4 and fig. 6, the pole frame 32 includes a pole plate 321 and an outer frame 322 disposed on the pole plate 321, the pole plate 321 is disposed on the cover plate body 31 and is connected to the cover plate body 31 in an insulating manner, the pole plate 321 and the outer frame 322 jointly enclose a receiving cavity 320, the second through hole 3211 is disposed on the pole plate 321, and the first tab 22 extends into the receiving cavity 320 through the second through hole 3211 and is electrically connected to the pole plate 321.

By providing the pole frame 32 as the pole plate 321 and the outer frame 322, on the one hand, the tab extending from the inside of the case 1 to the outside of the case 1 can be electrically connected to the upper surface of the pole plate 321 by being in contact with the upper surface of the pole plate 321, and the connection area between the tab and the pole plate 321 is increased, thereby improving the performance of the battery; on the other hand, when annotating the liquid to the battery, frame 322 can cooperate with annotating the liquid frock, and the electrolyte is poured into earlier and is held the chamber 320 in, carries out the water conservancy diversion to electrolyte, makes electrolyte flow into inside the battery from second through-hole 3211 smoothly again to improve and annotate liquid efficiency.

It should be noted that, in practical applications, it is not limited to setting the first tab 22 to be electrically connected to the pole plate 321, for example, the first tab 22 may also be set to be electrically connected to the inner wall of the outer frame 322, and so on, and such adjustment and change of the specific connection position between the first tab 22 and the pole frame 32 do not deviate from the principle and scope of the present invention should be included in the protection scope of the present invention. It is of course preferred that the first tab 22 is arranged in electrical connection with the pole plate 321.

It should be noted that, in practical applications, a person skilled in the art can set the post frame 32 to be formed by welding the post plate 321 and the outer frame 322, or can set the post plate 321 and the outer frame 322 to be integrally formed, so as to form the post frame 32, and so on, and such flexible adjustment and change do not deviate from the principles and scope of the present invention, which should be included in the protection scope of the present invention.

Preferably, the pole plate 321 and the outer frame 322 are integrally formed.

Through such setting, compare with the form that sets utmost point post frame 32 to forming through utmost point post board 321 and frame 322 welding, set utmost point post board 321 and frame 322 to integrated into one piece's form and can avoid spilling from the gap between utmost point post board 321 and the frame 322 when annotating the liquid to the battery of being convenient for annotates liquid, further promotes and annotates liquid efficiency.

It should be noted that, in practical applications, a person skilled in the art may set the outer frame 322 to be formed by connecting a plurality of straight plates, or may also set the outer frame 322 to be formed by connecting a plurality of arc plates, and so on, and such adjustment and change of the specific setting type of the outer frame 322 do not deviate from the principle and scope of the present invention, which should be included in the protection scope of the present invention.

Preferably, as shown in fig. 4 and 6, the outer frame 322 is configured to be connected by four straight plates.

It should be noted that, in practical application, a person skilled in the art can set the outer frame 322 to be perpendicular to the pole plate 321, so that the longitudinal section of the accommodating cavity 320 is rectangular, or, the outer frame 322 can also be set to be inclined to the pole plate 321, so that the longitudinal section of the accommodating cavity 320 is isosceles trapezoid, wherein the size of one side of the accommodating cavity 320 close to the pole plate 321 is smaller than the size of one side of the accommodating cavity 320 far away from the pole plate 321, and so on, and such flexible adjustment and change do not deviate from the principles and ranges of the present invention should be included in the protection scope of the present invention.

Illustratively, as shown in fig. 4 and 6, the outer frame 322 is disposed perpendicular to the pole plate 321.

With continuing reference to fig. 4 and 6, and with continuing reference to fig. 7, fig. 7 is a schematic view of a connecting member according to the present invention.

Preferably, as shown in fig. 4, fig. 6 and fig. 7, the connecting member 33 of the present invention includes an annular cylinder 331 adapted to the first through hole 311 and the second through hole 3211 and a first limiting portion 332 and a second limiting portion 333 respectively disposed at two ends of the annular cylinder 331, the annular cylinder 331 sequentially passes through the first through hole 311 and the second through hole 3211, in the installed state, the first limiting portion 332 abuts against the pole plate 321, the second limiting portion 333 abuts against the cover plate main body 31, the pole ear passage 3311 is formed inside the annular cylinder 331, and the first pole ear 22 passes through the pole ear passage 3311 and extends into the accommodating cavity 320.

By the arrangement that the connecting member 33 is provided with the annular cylinder 331 and the first limiting part 332 and the second limiting part 333 which are arranged at the two ends of the annular cylinder 331, on one hand, the connection between the cover plate main body 31 and the pole frame 32 can be realized through the connecting member 33, the assembly of the cover plate assembly is convenient, and the assembly efficiency of the cover plate assembly is improved; on the other hand, the connection between the cover plate main body 31 and the post frame 32 can be realized by assembling the connecting member 33 into the first through hole 311 and the second through hole 3211, and there is no need to provide assembling holes on the cover plate main body 31 and the post frame 32, thereby facilitating the assembly of the connecting member 33, improving the production efficiency of the battery cover plate, and simultaneously, when injecting liquid into the battery, the electrolyte can flow into the inside of the housing 1 through the channel 3311 inside the annular cylinder 331 of the connecting member 33, thereby avoiding the electrolyte from flowing out from the gap between the post frame 32 and the cover plate main body 31 to cause leakage.

Preferably, as shown in fig. 4 and 6, the cover plate assembly of the present invention further includes a first sealing gasket 35 and a second sealing gasket 36, the first sealing gasket 35 is disposed between the first limiting portion 332 and the pole plate 321, the second sealing gasket 36 is disposed between the second limiting portion 333 and the cover plate main body 31, under the condition of being mounted, the first limiting portion 332 abuts against the first sealing gasket 35, and the second limiting portion 333 abuts against the second sealing gasket 36.

By providing the first gasket 35 and the second gasket 36, the connection member 33 and the cover plate body 31 and the post frame 32 can be sealed, and when the battery is filled with electrolyte, the electrolyte can be prevented from flowing out from the gap between the connection member 33 and the first through hole 311 and the second through hole 3211, thereby preventing leakage of the battery.

It should be noted that, in practical applications, the connecting member 33 is not limited to be configured as the annular cylinder 331 and the first limiting portion 332 and the second limiting portion 333 disposed at two ends of the annular cylinder 331, for example, the connecting member 33 may be configured as a structure matching a bolt and a bolt hole, or the connecting member 33 may be configured as a structure matching a clamping block and a clamping slot, and so on, and such adjustment and change of the specific configuration type of the connecting member 33 do not deviate from the principle and scope of the present invention, which should be included in the protection scope of the present invention. It is of course preferable that the connection member 33 is provided as the annular cylinder 331 and the first and second stopper portions 332 and 333 provided at both ends of the annular cylinder 331.

It should be noted that, in practical application, a person skilled in the art may set the first limiting portion 332 and the second limiting portion 333 to be welded to both ends of the annular cylinder 331, or may insert the annular cylinder 331 into the first through hole 311 and the second through hole 3211 first, and then rivet both ends of the annular cylinder 331 on the pole plate 321 and the cover plate main body 31, respectively, so as to form the first limiting portion 332 and the second limiting portion 333 at both ends of the annular cylinder 331, and so on, which flexibly adjust and change without deviating from the principles and scope of the present invention should be included in the protection scope of the present invention.

Preferably, when the connecting member 33 is assembled, the annular cylinder 331 is sequentially inserted into the first through hole 311 and the second through hole 3211, and both ends of the annular cylinder 331 are respectively riveted to the pole plate 321 and the cover plate body 31, so that the first stopper 332 and the second stopper 333 are formed at both ends of the annular cylinder 331.

With such an arrangement, as compared with a form in which the first stopper portion 332 and the second stopper portion 333 are welded to the annular cylinder 331, the first stopper portion 332 and the second stopper portion 333 are formed at both ends of the annular cylinder 331 by respectively caulking both ends of the annular cylinder 331 to the cover main body 31 and the post frame 32, thereby improving the assembly efficiency of the connecting member 33 and further improving the assembly efficiency of the battery pack.

It should be noted that, in practical application, a person skilled in the art can set the casing 1 to be made of metal, or can set the casing 1 to be made of plastic, etc., and such adjustment and change to the specific material of the casing 1 do not deviate from the principle and scope of the present invention, which should be included in the protection scope of the present invention.

Preferably, the housing 1 is made of metal, and further preferably, the housing 1 is made of aluminum.

It should be noted that, in practical application, those skilled in the art can set the lower surface of the pole frame 32 to be an insulating material, so as to realize the insulating connection between the pole frame 32 and the cover plate main body 31, or can also set the upper surface of the cover plate main body 31 to be an insulating material, so as to realize the insulating connection between the pole frame 32 and the cover plate main body 31, or further, an insulating member can be further set between the cover plate main body 31 and the pole frame 32, so as to realize the insulating connection between the pole frame 32 and the cover plate main body 31 through the insulating member, and so on, so that the principle and range of the present invention can be flexibly adjusted and changed without deviating from the present invention.

Preferably, as shown in fig. 4 to 6, the cover plate assembly of the present invention further includes a first insulating member 37, the first insulating member 37 is disposed between the cover plate main body 31 and the pole frame 32, so that the pole frame 32 is connected to the cover plate main body 31 in an insulating manner, and the first insulating member 37 is provided with a third through hole 371 at a position corresponding to the first through hole 311 and the second through hole 3211.

In this arrangement, the first insulating member 37 is provided to insulate and connect the post frame 32 and the cover plate body 31, thereby insulating and connecting the post frame 32, the cover plate body 31 and the case 1, and further improving the safety of the battery, and the third through hole 371 is provided in the first insulating member 37, so that the tab can be easily passed through the first through hole 311, the second through hole 3211 and the third through hole 371 in sequence and then be passed out of the case 1, and when the battery is charged, the electrolyte injected from the second through hole 3211 can smoothly flow into the battery.

It should be noted that, in practical applications, the first insulating member 37 can be configured as an insulating pad, or the first insulating member 37 can be configured as an insulating block, etc., and such adjustment and change of the specific configuration of the first insulating member 37 do not depart from the principle and scope of the present invention, and all shall be included in the protection scope of the present invention.

Preferably, the first insulating member 37 is provided as an insulating pad.

Preferably, as shown in fig. 4 and 6, the cover plate assembly of the present invention further includes a second insulating member 38, the second insulating member 38 is disposed on a side of the cover plate main body 31 away from the pole frame 32, the second insulating member 38 is adapted to the opening, so that the cover plate main body 31 is connected to the electric core assembly in the housing 1 in an insulating manner when the cover plate assembly is covered on the opening, and the second insulating member 38 is provided with a fourth through hole 3811 at a position corresponding to the first through hole 311.

Through the arrangement, the cover plate main body 31 and the electric core assembly can be in insulated connection under the action of the second insulating component 38, so that the cover plate main body 31 and the shell 1 are in insulated connection, and the influence on the safety of the battery caused by the electrification of the cover plate main body 31 and the shell 1 is avoided; meanwhile, the fourth through hole 3811 is provided in the second insulating member 38, so that the first tab 22 is easily extended from the inside of the case 1 to the outside of the case 1, and the electrolyte is easily injected into the case 1 during the injection of the battery.

It should be noted that, in practical applications, those skilled in the art can set the second insulating member 38 as an insulating block, wherein the top of the insulating block contacts and is connected to the side of the cover plate main body 31 away from the pole frame 32, and the side of the insulating block is connected to the inner wall of the housing 1 in an insulating manner, or can set the second insulating member 38 as a sheet-shaped insulating pad and a cylindrical insulating pad (as shown in fig. 6), wherein the sheet-shaped insulating pad contacts and is connected to the side of the cover plate main body 31 away from the pole frame 32 in an insulating manner, and the cylindrical insulating pad is connected to the inner wall of the housing 1 in an insulating manner, and so on, and such adjustment and change of the specific setting type of the second insulating member 38 are not departing from the principle and scope of the present invention, and all should be included in the protection scope of the present invention.

Preferably, as shown in fig. 4 and 6, the second insulating member 38 includes a sheet-shaped insulating pad 381 and a cylindrical insulating pad 382 connected to an edge of the sheet-shaped insulating pad 381, the sheet-shaped insulating pad 381 is adapted to the cover plate main body 31 and is disposed on a side of the cover plate main body 31 away from the pole post frame 32, wherein the fourth through hole 3811 is disposed on the sheet-shaped insulating pad 381, and the cylindrical insulating pad 382 is adapted to an inner wall of the housing 1 and is disposed on an inner wall of the housing 1.

Through such an arrangement, on one hand, the cover plate main body 31 can be in insulated connection with the electric core assembly under the action of the second insulating member 38, and at the same time, the shell 1 is in insulated connection with the electric core assembly, so that the safety of the battery is improved; on the other hand, the second insulating member 38 is provided in the form of an insulating spacer that fits the inner walls of the lid main body 31 and the case 1, so that the volume of the second insulating member 38 can be reduced, the space utilization rate in the case 1 can be improved, and the energy density of the battery can be further improved.

It should be noted that, in practical applications, a person skilled in the art may set the second insulating member 38 to be a form in which the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 are integrally formed, or may set the second insulating member 38 to be a form in which the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 are separated from each other, and in a mounted state, the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 contact each other, and so on, such flexible adjustment and change do not depart from the principles and scope of the present invention, which should be included in the protection scope of the present invention.

Preferably, the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 are integrally formed.

With such an arrangement, the provision of the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 as an integral molding can further improve the stability of the insulating connection between the cap plate main body 31 and the electric core assembly, compared to the provision of the sheet-shaped insulating pad 381 and the cylindrical insulating pad 382 as separate forms from each other, thereby improving the safety of the battery.

Illustratively, when the cover plate assembly is assembled, the pole column frame 32, the first insulating member 37, the cover plate main body 31 and the second insulating member 38 are sequentially stacked, the annular cylinder 331 sequentially passes through the second through hole 3211 on the pole column frame 32, the third through hole 371 on the first insulating member 37, the first through hole 311 on the cover plate main body 31 and the fourth through hole 3811 on the second insulating member 38, the first gasket 35 and the second gasket 36 are respectively sleeved at two ends of the annular cylinder 331, and then the top end of the annular cylinder 331 is riveted on the pole column plate 321, so as to form a first limiting portion 332, wherein the first limiting portion 332 abuts against the first gasket 35, the bottom end of the annular cylinder 331 is riveted on the cover plate main body 31, so as to form a second limiting portion 333, wherein the second limiting portion 333 abuts against the second gasket 36, the first limiting portion 332 and the second limiting portion 333 can prevent the annular cylinder 331 from coming out of the first through hole 311 and the second through hole 3211, so as to complete the assembly of the cover plate assembly, and the tab 3311 is formed inside the annular cylinder 331.

With continuing reference to fig. 6 and with subsequent reference to fig. 8, fig. 8 is an enlarged view of a portion of fig. 3, showing the assembly of the cover plate assembly with the housing and the electrical core assembly.

Preferably, as shown in fig. 6 and 8, the first tab 22 includes a main body 221 and a bent portion 222, wherein one end of the main body 221 is connected to the electric core assembly, and the other end of the main body 221 is connected to the bent portion 222, and when assembled, the bent portion 222 can extend toward the first opening 11 so that the first tab 22 can smoothly pass through the tab passage 3311 inside the annular cylinder 331, and when assembled, the bent portion 222 can be bent with respect to the main body 221 so that the bent portion 222 is electrically connected to the pole plate 321.

It should be noted that, in practical applications, the first tab 22 is not limited to be bent relative to the main body 221 after the bending portion 222, which is described above, passes through the tab passage 3311, so that the bending portion 222 is electrically connected to the pole plate 321, for example, the first tab 22 may be further configured to be welded to the main body 221 and the pole plate 321 respectively so as to achieve the electrical connection between the first tab 22 and the pole plate 321, and so on, and such flexible adjustment and change do not deviate from the principles and scope of the present invention, which should be included in the protection scope of the present invention. It is of course preferable that the first tab 22 is provided such that the bent portion 222 described above is bent with respect to the body portion 221 after passing through the tab passage 3311, so that the bent portion 222 is electrically connected to the tab plate 321.

When assembling the battery, firstly, the electrode assembly is installed in the housing 1, and the main body 221 and the bent portion 222 of the first tab 22 both extend toward the first opening 11, when the cover plate assembly is covered at the first opening 11, the main body 221 and the bent portion 222 of the first tab 22 pass through the tab passage 3311 and extend into the electrode frame 32, the cylindrical insulating pad 382 of the second insulating member 38 contacts with the inner wall of the housing 1, the sheet insulating pad 381 contacts with one side of the cover plate main body 31 away from the electrode post frame 32, the cover plate main body 31 is welded to the housing 1, the bent portion 222 is bent relative to the main body 221, the bent portion 222 contacts with the upper surface of the electrode post plate 321, and the bent portion 222 and the electrode post plate 321 are welded to electrically connect the first tab 22 and the electrode frame 32.

It should be noted that, although the present invention is described by taking the cover plate assembly disposed at the first opening 11 as an example, this is not restrictive, the structure of the cover plate assembly disposed at the first opening 11 is also applicable to the structure of the cover plate assembly disposed at the second opening 12, and correspondingly, the connection relationship between the cover plate assembly disposed at the first opening 11 and the housing 1, the cell assembly is also applicable to the connection relationship between the cover plate assembly disposed at the second opening 12 and the housing 1, the cell assembly, and so on.

The two cover plate assemblies are respectively covered at the first opening 11 and the second opening 12 according to the steps, the first tab 22 and the second tab 23 respectively penetrate through the tab passages 3311 on the cover plate assemblies at the two ends and then extend into the pole frame 32, and the first tab 22 and the second tab 23 are respectively bent and welded with the upper surface of the corresponding pole plate 321, so that the first tab 22 and the second tab 23 are respectively electrically connected with the pole frame 32 on the corresponding cover plate assembly, and the assembly of the cover plate assembly, the shell 1 and the electric core assembly is completed.

After the battery assembly is accomplished, toast the battery, annotate the liquid, when annotating the liquid, make annotate the liquid frock card to the edge (not shown in the figure) of the frame 322 of utmost point post frame 32, realize compressing tightly sealed, inject into electrolyte again and hold the chamber 320 in, the electrolyte that holds in the chamber 320 flows into casing 1 inside and pours into the electric core subassembly into through utmost point ear passageway 3311, hold the chamber 320 through what utmost point post board 321 and frame 322 enclosed, can carry out the water conservancy diversion to electrolyte, prevent to cause the electrolyte weeping when annotating the liquid, improve and annotate liquid efficiency.

After the battery is filled with liquid, the battery is soaked, formed and the like, and then the sealing member 34 matched with the accommodating cavity 320 is welded to the top of the outer frame 322 to seal the accommodating cavity 320, so that the battery is prepared.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an apron subassembly of battery, the battery include the casing and install in electricity core subassembly in the casing, the tip of electricity core subassembly is provided with utmost point ear, the casing court the direction that utmost point ear extends has the opening, apron subassembly lid is located the opening part, its characterized in that, the apron subassembly includes:

the cover plate main body is provided with a first through hole so that the lug can penetrate through the first through hole and extend out of the shell when the cover plate main body is covered at the opening;

the pole column frame is arranged on the cover plate main body and is in insulated connection with the cover plate main body, the pole column frame is provided with an accommodating cavity, a second through hole is formed in the pole column frame at a position corresponding to the first through hole, and the second through hole is communicated with the accommodating cavity so that the pole lug can extend into the accommodating cavity through the second through hole;

a connecting member for connecting the pole post frame and the cover main body; and

the sealing component is arranged on the pole column frame and is matched with the accommodating cavity so as to seal the accommodating cavity;

wherein the tab is electrically connected with the pole column frame and/or the sealing member.

2. The cover plate assembly of claim 1, wherein the tabs are electrically connected with the post frame.

3. The cover plate assembly according to claim 2, wherein the pole column frame includes a pole column plate and an outer frame disposed on the pole column plate, the pole column plate is disposed on the cover plate main body and is connected to the cover plate main body in an insulating manner, the pole column plate and the outer frame together enclose the accommodating cavity, the second through hole is disposed on the pole column plate, and the tab extends into the accommodating cavity through the second through hole and is electrically connected to the pole column plate.

4. The cover plate assembly according to claim 3, wherein the connecting member includes an annular cylinder body adapted to the first through hole and the second through hole, and a first limiting portion and a second limiting portion respectively disposed at two ends of the annular cylinder body, the annular cylinder body sequentially passes through the first through hole and the second through hole, in an installed state, the first limiting portion abuts against the pole plate, the second limiting portion abuts against the cover plate main body, a pole tab channel is formed inside the annular cylinder body, and the pole tab passes through the pole tab channel and extends into the accommodating cavity.

5. The cover assembly of claim 4, further comprising a first gasket disposed between the first retaining portion and the post plate and a second gasket disposed between the second retaining portion and the cover body, wherein in an installed condition, the first retaining portion abuts against the first gasket and the second retaining portion abuts against the second gasket.

6. The cap plate assembly according to claim 1, further comprising a first insulating member provided between the cap plate body and the post frame to insulate the post frame from the cap plate body, the first insulating member being provided with a third through hole at a position corresponding to the first and second through holes.

7. The cap assembly according to claim 1, further comprising a second insulating member provided at a side of the cap body away from the pole frame, the second insulating member being adapted to the opening so as to insulate the cap body from the electric core assembly when the cap assembly is fitted to the opening, the second insulating member being provided with a fourth through hole at a position corresponding to the first through hole.

8. A battery comprising the cap plate assembly of any one of claims 1 to 7.

9. The battery of claim 8, wherein the cell assembly includes a cell body and a first tab and a second tab extending from two ends of the cell body, the casing has a first opening toward a direction in which the first tab extends, the casing has a second opening toward a direction in which the second tab extends, the number of the cover plate assemblies is two, the two cover plate assemblies are respectively disposed at the first opening and the second opening, and the first tab and the second tab respectively pass through the corresponding first through hole and the corresponding second through hole and are electrically connected to the corresponding terminal frame.

10. The battery of claim 9, wherein the first tab and/or the second tab comprises a main body part and a bending part, one end of the main body part is connected with the cell main body, the other end of the main body part is connected with the bending part, and after the first tab passes through the first through hole and the second through hole, the bending part can be bent relative to the main body part to be electrically connected with the terminal frame.

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