CN220021345U - Cover plate assembly of battery unit, battery pack and power utilization device - Google Patents

Abstract

The utility model discloses a cover plate component of a battery monomer, the battery monomer, a battery pack and an electric device, wherein the cover plate component comprises: the collecting disc is provided with a first limiting part; a cap plate adapted to be fixed to a case of the battery cell; the separator is arranged between the collecting disc and the cover plate, the separator is provided with a second limiting part, and the first limiting part and the second limiting part are matched to position the separator. According to the cover plate assembly provided by the embodiment of the utility model, the first limiting part is arranged on the current collecting plate, the second limiting part is arranged on the separating piece, the first limiting part can be matched with the second limiting part to position the separating piece, and the separating piece and the current collecting plate can be prevented from rotating relatively, so that the separating piece is prevented from scratching the current collecting plate, the insulating effect of the separating piece is improved, and the reliability of the cover plate assembly is improved.

Description

Cover plate assembly of battery unit, battery pack and power utilization device

Technical Field

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

Background

In the related art, a monopolar column rivet cover plate assembly is generally used in a battery, and includes a cover plate, an insulating member for separating the cover plate from a current collecting plate, and a current collecting plate. However, the existing insulating member is directly placed on the current collecting disc, the position of the insulating member is not fixed, the current collecting disc is easy to scratch, the insulating member cannot well play a role in insulating isolation, and there is room for improvement.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a cover plate assembly of a battery cell, which can prevent the separator from scratching the current collecting disc and improve the insulation effect of the separator.

According to an embodiment of the utility model, a cover plate assembly of a battery cell comprises: the collecting disc is provided with a first limiting part; a cap plate adapted to be fixed to a case of the battery cell; the separator is arranged between the collecting disc and the cover plate, the separator is provided with a second limiting part, and the first limiting part and the second limiting part are matched to position the separator.

According to the cover plate assembly of the battery unit, the first limiting part is arranged on the current collecting disc, the second limiting part is arranged on the separating piece, the first limiting part can be matched with the second limiting part to position the separating piece, and relative rotation between the separating piece and the current collecting disc can be avoided, so that the separating piece is prevented from scratching the current collecting disc, the insulation effect of the separating piece is improved, and the reliability of the cover plate assembly is improved.

According to the cover plate assembly of the battery unit, one of the first limiting part and the second limiting part is a limiting notch, and the other is a limiting protrusion, and the limiting protrusion extends into the limiting notch.

According to the cover plate assembly of the battery unit, a plurality of first limiting parts are arranged at intervals along the circumferential direction of the current collecting disc, a plurality of second limiting parts are arranged, and the first limiting parts are matched with the second limiting parts one by one.

According to the cover plate assembly of the battery unit, the current collecting disc is provided with a welding area suitable for being electrically connected with the pole core, the separator is provided with an avoidance area which is opposite to the welding area, and the avoidance area is opposite to the welding area so that the welding area is exposed.

According to the cover plate assembly of some embodiments of the present utility model, the avoidance area and the second limiting portion are spaced apart in the circumferential direction of the partition.

According to the cover plate assembly of the battery unit, the current collecting disc comprises a main disc body, bridge edges and a plurality of connecting pieces, the main disc body is provided with a plurality of connecting grooves which are arranged at intervals, each connecting piece is connected with the inner side wall of one connecting groove through the bridge edge, and each connecting piece defines the welding area.

According to the cover plate assembly of the battery unit, on the first projection surface, the orthographic projection of the outer peripheral wall of the main disk body is located on the first circular ring, the main disk body is provided with a middle part which is suitable for being electrically connected with the conductive column, the connecting groove is located on the radial outer side of the middle part in the radial direction of the main disk body, the orthographic projection of the first projection surface of the bridge Bian Zaisuo is located on the radial inner side of the outer peripheral edge of the orthographic projection of the connecting sheet, and the conductive column is suitable for being electrically connected with an external element.

According to the cover plate assembly of the battery unit, the separating piece is provided with a plurality of avoidance areas, and the plurality of avoidance areas and the plurality of connecting grooves are arranged in a one-to-one opposite mode in the first direction.

The cover plate assembly of the battery cell according to some embodiments of the present utility model further comprises: the electric current collecting plate comprises a conductive column and a metal connecting piece, wherein the first end of the conductive column is electrically connected with the middle part of the current collecting plate, the second end of the conductive column is electrically connected with the metal connecting piece, a first insulating piece is arranged between the metal connecting piece and the cover plate, and a second insulating piece is arranged between the conductive column and the cover plate.

According to a cover assembly of a battery cell according to some embodiments of the utility model, a portion of the second insulator is located between the cover and the first end.

According to the cover plate assembly of the battery unit, the second insulating piece is an elastic piece.

According to the cover plate assembly of the battery unit, the cover plate is provided with a mounting hole, the conductive column penetrates through the mounting hole, the first insulating piece is provided with an extending protrusion extending towards the mounting hole, and the extending protrusion is abutted against the second insulating piece.

According to the cover plate assembly of the battery cell according to some embodiments of the present utility model, the middle portion is formed as a mounting through hole penetrating the current collecting plate in a thickness direction, the first end is positioned in the mounting through hole, and an outer circumferential wall of the first end is welded to an inner wall of the mounting through hole.

A cover assembly of a battery cell according to some embodiments of the utility model, the conductive posts extending in a first direction; in the first direction, the metal connecting piece, the cover plate and the separating piece are sleeved on the conductive column in sequence, and the second end is suitable for being deformed under pressure so that at least one part of the second end is positioned on one side of the metal connecting piece, which is away from the current collecting disc, and is in contact with the metal connecting piece.

The utility model also provides a battery monomer.

According to an embodiment of the present utility model, a battery cell includes: the shell is provided with an assembly hole at the end part; the pole core is arranged in the shell and provided with a pole lug; the cover plate assembly according to any one of the above embodiments, wherein the cover plate is fixed to the housing and closes the fitting hole, and the current collecting plate is electrically connected to the pole core.

According to the battery cell provided by the embodiment of the utility model, the first limiting part is arranged on the current collecting disc, and the second limiting part is arranged on the separator, so that the first limiting part can be matched with the second limiting part to position the separator, and the separator and the current collecting disc can be prevented from rotating relatively, so that the separator is prevented from scratching the current collecting disc, the insulation effect of the separator is improved, the reliability of the cover plate assembly is improved, and the practicability of the battery cell is improved.

According to some embodiments of the utility model, the cover plate includes a plate body and a first stopping portion, the first stopping portion is located at an outer peripheral edge of the plate body, the first stopping portion is located in the housing and stops against an inner wall of the housing, the first stopping portion is fixedly connected with the housing, and the plate body is sleeved on the conductive column.

The utility model also provides a battery pack.

The battery pack according to the embodiment of the utility model comprises a plurality of battery cells, wherein the battery cells are the battery cells according to any one of the embodiments.

According to the battery pack disclosed by the embodiment of the utility model, the first limiting part is arranged on the current collecting disc, and the second limiting part is arranged on the separating piece, so that the first limiting part can be matched with the second limiting part to position the separating piece, and the relative rotation between the separating piece and the current collecting disc can be avoided, so that the separating piece is prevented from scratching the current collecting disc, the insulating effect of the separating piece is improved, the reliability of the cover plate assembly is improved, the practicability of a battery monomer is improved, and the reliability of the battery pack is improved.

The utility model also provides an electric device.

The power utilization device according to the embodiment of the utility model comprises the battery pack according to any of the above embodiments.

According to the electricity utilization device provided by the embodiment of the utility model, the first limiting part is arranged on the current collecting disc, the second limiting part is arranged on the separating piece, and the first limiting part can be matched with the second limiting part to position the separating piece, so that the separating piece and the current collecting disc can be prevented from rotating relatively, the separating piece is prevented from scratching the current collecting disc, the insulating effect of the separating piece is improved, the reliability of the cover plate assembly is improved, the practicability of a battery monomer is improved, the reliability of a battery pack is improved, and the overall performance of the electricity utilization device is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is an isometric view of a cover plate assembly according to an embodiment of the utility model;

FIG. 2 is an exploded view of a closure assembly according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a cover plate assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a manifold disk according to an embodiment of the utility model;

FIG. 5 is a schematic view of a cover plate according to an embodiment of the utility model;

fig. 6 is a schematic view of a battery cell according to an embodiment of the present utility model;

fig. 7 is an exploded view of a battery cell according to an embodiment of the present utility model.

Reference numerals:

the battery cell 1000 is formed of a plurality of battery cells,

the cover assembly 100, the housing 200, the assembly hole 201,

the conductive column 1, the second end 11, the first end 12, the current collecting plate 2, the main plate body 21, the mounting through hole 211, the connecting groove 212, the connecting sheet 22, the bridge edge 23, the limit notch 24,

the metal connector 3, the cover plate 4, the plate body 41, the mounting hole 411, the first stopper 42,

the spacer 5, the relief area 51, the limit projection 52, the first insulator 6, the extension projection 61, the second insulator 7.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Next, referring to the drawings, a cap plate assembly 100 of a battery cell according to an embodiment of the present utility model is described.

It should be noted that, the battery cell 1000 includes a pole core and a housing 200, the pole core is installed in the housing 200, the cover plate assembly 100 is installed at one end of the housing 200 along the axial direction, the end of the pole core is provided with a pole ear, and the pole ear is disposed opposite to the cover plate assembly 100 and is used for being electrically connected with the cover plate assembly 100.

As shown in fig. 1 to 7, a cap plate assembly 100 according to an embodiment of the present utility model includes: the current collecting disc 2 is provided with a first limiting part; a cover plate 4, the cover plate 4 being adapted to be fixed to the case 200 of the battery cell 1000; the separator 5, the separator 5 is located between collecting tray 2 and the apron 4, and separator 5 is equipped with the spacing portion of second, and first spacing portion and the spacing portion cooperation of second are in order to fix a position separator 5.

Therefore, the relative rotation between the separator 5 and the collecting tray 2 can be avoided, thereby preventing the separator 5 from scratching the collecting tray 2 and being beneficial to improving the insulation effect of the separator 5.

For example, referring to fig. 1-3, the cover plate assembly 100 includes: the current collecting disc 2 and the cover plate 4, the current collecting disc 2 is arranged in the shell 22 and opposite to the lug of the pole core, and the current collecting disc 2 is used for being electrically connected with the lug of the pole core, so that the pole core can be electrically connected with the current collecting disc 2 to supply power outwards. The cover plate 4 is disposed on a side of the collecting tray 2 facing away from the electrode core, and the cover plate 4 is used for being fixed on the housing 200 of the battery unit 100, so that the cover plate assembly 100 can be fixed on the housing 200, and the open end of the housing 200 is closed, so as to prevent components in the housing 200 from being separated from the housing. It should be noted that, the collecting tray 2 may be cut from a single part, so that the processing difficulty of the collecting tray 2 is low and the structural stability is high.

The cover plate assembly 100 is further provided with a separator 5, the separator 5 is disposed between the current collecting tray 2 and the cover plate 4, and the separator 5 is used for insulating and separating the cover plate 4 from the current collecting tray 2, so as to avoid the current collecting tray 2 from being electrically connected with the cover plate 4. Meanwhile, a first limiting part can be arranged on the current collecting disc 2, a second limiting part is arranged on the separating piece 5, and the first limiting part and the second limiting part are oppositely arranged and matched, so that the current collecting disc 2 can position the separating piece 5, and therefore, relative rotation between the separating piece 5 and the current collecting disc 2 can be avoided, the current collecting disc 2 is prevented from being scratched by the separating piece 5, and the insulating effect of the separating piece 5 is improved.

According to the cover plate assembly 100 of the embodiment of the utility model, the first limiting part is arranged on the current collecting disc 2, and the second limiting part is arranged on the separator 5, so that the first limiting part can be matched with the second limiting part to position the separator 5, and the relative rotation between the separator 5 and the current collecting disc 2 can be avoided, thereby preventing the separator 5 from scratching the current collecting disc 2, being beneficial to improving the insulation effect of the separator 5 and improving the reliability of the cover plate assembly 100.

In some embodiments of the present utility model, one of the first and second limiting portions is a limiting notch 24, and the other is a limiting protrusion 52, and the limiting protrusion 52 extends into the limiting notch 24.

For example, referring to fig. 2 and 4, the first limiting portion may be provided as the limiting notch 24, and the second limiting portion may be provided as the limiting projection 52, that is, the side of the separator 5 facing the current collecting tray 2 is provided with the limiting projection 52 protruding from the separator 5, and the current collecting tray 2 is provided with the limiting notch 24 penetrating through the current collecting tray 2 in the thickness direction; alternatively, the first limiting portion may be provided as the limiting projection 52, and the second limiting portion may be provided as the limiting notch 24. In this way, circumferential spacing between the collector plate 2 and the separator 5 may be achieved by extending the spacing projections 52 into the spacing notches 24. Therefore, the processing difficulty of the cover plate assembly 100 is reduced, the processing cost is reduced, and the practicability of the cover plate assembly 100 is improved.

In other embodiments, the first limiting portion may be provided as a circular through hole, and the second limiting portion may be provided as an elastic claw, that is, the side of the separator 5 facing the collecting tray 2 is provided with an elastic claw protruding from the separator 5, and the collecting tray 2 is provided with a circular through hole penetrating through the collecting tray 2 in the thickness direction; alternatively, the first limiting portion may be provided as an elastic claw, and the second limiting portion may be provided as a circular through hole. In this way, the elastic claw can be clamped with the circular through hole, so that circumferential limit between the collecting tray 2 and the separator 5 can be realized.

In some embodiments of the present utility model, the first limiting portions are plural and are arranged at intervals along the circumferential direction of the collecting tray 2, the second limiting portions are plural, and the first limiting portions and the second limiting portions are matched one by one.

For example, referring to fig. 2 and 4, a plurality of first limiting portions may be provided on the current collecting tray 2, the plurality of first limiting portions may be arranged at intervals along the circumferential direction of the current collecting tray 2, and a plurality of second limiting portions may be provided on the separator 5, the plurality of second limiting portions may be arranged at intervals along the circumferential direction of the separator 5, and the plurality of first limiting portions and the plurality of second limiting portions may face and cooperate one by one to realize limiting of the current collecting tray 2 and the separator 5 along the circumferential direction. Thus, the relative rotation between the collecting tray 2 and the separator 5 can be avoided, the avoidance area 51 can be ensured to be opposite to the connecting groove 212, and the stability of the cover plate assembly 100 is improved.

In some embodiments of the utility model, the collector plate 2 is provided with a welding zone adapted to be electrically connected to the pole piece, the separator 5 is provided with a relief zone 51, and the relief zone 51 is disposed opposite to the welding zone so as to expose the welding zone.

For example, referring to fig. 1-2, a welding region may be provided on the current collecting plate 2, and the current collecting plate may be welded to the tab at the welding region to be electrically connected to the tab. The spacer 5 is provided with the avoidance area 51, and the avoidance area 51 and the welding area of the current collecting disc 2 are arranged opposite to each other, so that the avoidance area 51 can avoid the welding area, the welding area is exposed, and the welding difficulty of the tab and the current collecting disc 2 is reduced. Therefore, the mounting difficulty of the cover plate assembly 100 can be reduced, the processing yield and the production efficiency are improved, the current collecting disc 2 does not need to be bent, the space occupation of the cover plate assembly 100 along the Z direction is reduced, and the reliability of the cover plate assembly 100 is improved.

In some embodiments of the present utility model, the relief area 51 and the second stopper are provided at intervals in the circumferential direction of the partitioning member 5. For example, as shown with reference to fig. 2 and 4, in the circumferential direction of the partitioning member 5, a second stopper portion may be provided to be spaced apart from the relief region 51 so that the first stopper portion, the second stopper portion may be kept at a certain distance from the welding region. Therefore, the influence of the welding process on the first limiting part and the second limiting part is reduced, the limiting precision is improved, and the reliability of the cover plate assembly 100 is improved.

Further, the first limiting part and the second limiting part can be respectively arranged on the radial outer sides of the collecting tray 2 and the separating piece 5, which is beneficial to reducing the processing difficulty.

In some embodiments of the present utility model, the current collecting plate 2 includes a main plate body 21, a bridge edge 23, and a plurality of connection plates 22, wherein the main plate body 21 is provided with a plurality of connection grooves 212 spaced apart, each connection plate 22 is connected to an inner sidewall of one of the connection grooves 212 through the bridge edge 23, and each connection plate 22 defines a welding area.

For example, referring to fig. 1 and 4, the collecting tray 2 includes a main tray body 21, a bridge 23, and a plurality of connection pieces 22, and the main tray body 21 is provided with connection grooves 212, the connection grooves 212 being configured to penetrate the main tray body 21 in the up-down direction, the connection grooves 212 being provided in plurality, and the plurality of connection grooves 212 being provided at intervals, such as may be provided at intervals along the circumferential direction of the main tray body 21. Each connecting slot 212 is internally provided with a connecting sheet 22, the connecting sheet 22 is designed to be conformal relative to the connecting slot 212, and the size of the connecting sheet 22 is smaller than that of the connecting slot 212, so that the peripheral wall of the connecting sheet 22 is arranged at intervals from the inner side wall of the connecting slot 212, and one side edge of the connecting slot 212 can be connected with the inner side wall of the corresponding connecting slot 212 through a bridge edge 23 to connect the connecting sheet 22 on the main disc body 21, and each connecting sheet 22 defines a welding area, so that the connecting sheet 22 can be used for being welded and connected with a tab. Thus, the connection area between the current collecting plate 2 and the tab can be increased, and the overcurrent capacity can be improved.

It can be appreciated that, since the connection piece 22 is connected with the main disc body 21 only through the bridge edge 23, when the pole core vibrates, the connection piece 22 can slightly deform to absorb impact force, so that the vibration can be reduced to pull the welding seam between the pole lug and the connection piece 22, the connection stability of the current collecting disc 2 and the pole lug is improved, and the width of the bridge edge 23 can be adjusted to meet various quick-charging requirements of different battery monomers 1000, and the practicability of the cover plate assembly 100 is improved.

In some embodiments of the present utility model, on the first projection plane, the orthographic projection of the outer peripheral wall of the main disc 21 is located on the first ring, the main disc 21 is provided with an intermediate portion adapted to be electrically connected with the conductive post 1, the connection groove 212 is located radially outside the intermediate portion in the radial direction of the main disc 21, the orthographic projection of the bridge edge 23 on the first projection plane is located radially inside the outer peripheral edge of the orthographic projection of the connection piece 22, and the conductive post 1 is adapted to be electrically connected with an external element.

For example, referring to fig. 4, the first projection surface is perpendicular to the thickness direction of the main disk body 21, and on the first projection surface, an orthographic projection of the outer peripheral wall of the main disk body 21 may be provided entirely on the first annular ring to configure the outer peripheral wall of the main disk body 21 into an annular shape, or a portion of the orthographic projection of the outer peripheral wall of the main disk body 21 may be provided within the first annular ring, for example, a projection or a recess may be formed at the outer peripheral wall of the main disk body 21 to configure the outer peripheral wall of the main disk body 21 into an approximately annular shape.

Wherein the main disk body 21 is provided with an intermediate portion adapted to be electrically connected with the conductive column 1, and the connection groove 212 is located radially outside the intermediate portion in the radial direction of the main disk body 21 so as to be arranged apart from the conductive column 1. The connecting groove 121 is configured as a polygon, the orthographic projection of the bridge edge 23 on the first projection plane is located radially inward of the peripheral edge of the orthographic projection of the connecting piece 22, so that the length of the conductive path between the tab of the pole core and the conductive post 1 is short, and the conductive post 1 is adapted to be electrically connected with an external element, so that the pole core can be electrically connected with the external element through the conductive post 1.

It will be appreciated that by providing a shorter length of the conductive path between the pole piece and the conductive post 1, the length of the conductive path between the pole piece and the external element can be reduced to reduce the resistance of the conductive path and improve the overcurrent capability.

Preferably, the connection groove 212 may be configured as a triangle, and the connection piece 22 may be correspondingly configured as a triangle, and may be connected to the main disk body 21 at any side of the connection piece 22 along the circumferential direction of the main disk body 21, so that the loop length between the tab and the conductive post 1 is short; alternatively, the connection groove 212 may be configured in a fan shape, and the connection piece 22 may be correspondingly configured in a fan shape, and may be connected to the main disk body 21 at a side of the connection piece 22 facing the center of the main disk body 21, or the connection piece 22 may be connected to the main disk body 21 at any side of the connection piece 22 in the circumferential direction of the main disk body 21, so that the loop length between the tab and the conductive post 1 is short.

In some embodiments of the present utility model, the partition 5 is provided with a plurality of relief areas 51, and the plurality of relief areas 51 are disposed opposite to the plurality of connection grooves 212 in the first direction.

For example, referring to fig. 1-2, a plurality of relief areas 51 may be provided on the spacer 5, and the plurality of relief areas 51 may be disposed directly opposite the plurality of connecting grooves 212 in the first direction, so that the spacer 5 may relief the connecting piece 22. In this way, during the installation process of the cover plate assembly 100, the cover plate assembly 100 can be assembled first, and then the connecting piece 22 and the tab are welded. Therefore, the mounting difficulty of the cover plate assembly 100 can be reduced, and the practicability and reliability of the cover plate assembly 100 are improved.

In some embodiments of the present utility model, the cap plate assembly 100 of the battery cell of the embodiment of the present utility model further includes: the conductive column 1 and the metal connecting piece 3, the first end 12 of the conductive column 1 is electrically connected with the middle part of the current collecting disc 2, the second end 11 of the conductive column 1 is electrically connected with the metal connecting piece 3, the first insulating piece 6 is arranged between the metal connecting piece 3 and the cover plate 4, and the second insulating piece 7 is arranged between the conductive column 1 and the cover plate 4.

For example, referring to fig. 1 to 3, the cap plate assembly 100 includes a conductive post 1 and a metal connector 3, and both ends of the conductive post 1 are formed as a first end 12 and a second end 11, respectively. The current collecting disc 2 and the metal connecting piece 3 are respectively arranged at two ends of the conductive column 1, the middle part of the current collecting disc 2 can be electrically connected with the first end 12 so that the pole core can be electrically connected with the conductive column 1, the metal connecting piece 3 can be electrically connected with the second end 11 of the conductive column 1, the side wall of the metal connecting piece 3, which is away from the current collecting disc 2, is formed into an electrical connection surface, and the pole core can be externally powered through the electrical connection surface. Preferably, the material of the metal connector 3 may be taken as aluminum.

Wherein, can be equipped with first insulating part 6 between metal connector 3 and apron 4, first insulating part 6 is constructed to the annular structure that the diameter is greater than metal connector 3, and one side that first insulating part 6 deviates from apron 4 is formed with the holding tank, and metal connector 3 can stretch into the holding tank for first insulating part 6 can be with apron 4 and metal connector 3 insulating separation, in order to avoid metal connector 3 to be connected with apron 4 electricity. Meanwhile, a second insulating member 7 may be disposed between the cover plate 4 and the conductive post 1, and the second insulating member 7 is used to insulate the conductive post 1 from the cover plate 4, so as to avoid the conductive post 1 from being electrically connected with the cover plate 4. Through the arrangement, the cover plate 4 can be prevented from being electrically connected with the pole core, so that the short circuit phenomenon of the shell 200 is prevented, and the reliability of the cover plate assembly 100 is improved.

In some embodiments of the present utility model, the minimum diameter of the conductive pillar 1 may be set to L1, and the minimum diameter L1 of the conductive pillar 1 is set to 2mm or more; the diameter of the collecting tray 2 may be set to L2, and the diameter L2 of the collecting tray 2 is set to 10mm or more; the height of the conductive posts 1 may be set to H1, and the height of the conductive posts 1 is 0.5mm or more and 10mm or less. Thereby, the caulking reliability and the overcurrent capability can be improved.

In some embodiments of the utility model, a portion of the second insulator 7 is located between the cover plate 4 and the first end 12. For example, referring to fig. 3, the diameter of the first end 12 may be set to be larger than the diameter of the second end 11, so that the size of the first end 12 is larger, the connection area between the current collecting plate 2 and the conductive post 1 may be increased, and the resistance of the conductive path may be reduced. Meanwhile, a portion of the second insulating member 7 may be disposed to extend in a horizontal direction to extend between the cap plate 4 and the first end 12, so that the second insulating member 7 may insulate the cap plate 4 from the first end 12 to avoid the cap plate 4 from being electrically connected to the conductive post 1. Thereby, the insulating performance of the cover plate 4 is improved.

In some embodiments of the present utility model, the second insulating member 7 may be provided as an elastic member. Through the above-mentioned setting, after the second end 11 of conductive post 1 warp the riveting, the part atress deformation that second insulating part 7 is located between apron 4 and the first end 12, and second insulating part 7 can outwards exert elastic force to make the connection between metal connector 3, first insulating part 6, apron 4, second insulating part 7 and the separator 5 inseparable, can avoid the condition that appears relative motion between metal connector 3, first insulating part 6, apron 4, second insulating part 7 and the separator 5, do benefit to the overall stability that improves apron subassembly 100.

In some embodiments of the present utility model, the cover plate 4 is provided with a mounting hole 411, the conductive post 1 passes through the mounting hole 411, the first insulating member 6 is provided with an extension protrusion 61 extending into the mounting hole 411, and the extension protrusion 61 abuts against the second insulating member 7.

For example, referring to fig. 2 and 5, a mounting hole 411 may be provided at a central position of the cap plate 4, the mounting hole 411 penetrating the cap plate 4 in an up-down direction, the mounting hole 411 having a diameter larger than that of the conductive post 1, the conductive post 1 may pass through the mounting hole 411, and an inner circumferential wall of the mounting hole 411 may be disposed spaced apart from an outer circumferential wall of the conductive post 1. An extension protrusion 61 is formed at the inner side edge of the first insulating member 6, the extension protrusion 61 is configured to be arranged to extend downward, the extension protrusion 61 may extend between the outer peripheral wall of the conductive post 1 and the inner peripheral wall of the mounting hole 411, and the lower end of the extension protrusion 61 may abut against the second insulating member 7. In this way, the first insulator 6 and the second insulator 7 can cooperate to completely separate the conductive post 1 from the cover plate 4. Thereby, the insulating performance of the cover plate 4 is improved, and the possibility of leakage of the case 200 is reduced.

In some embodiments of the present utility model, the middle portion is formed to penetrate through the mounting through hole 211 of the current collecting plate 2 in the thickness direction, the first end 12 is positioned in the mounting through hole 211 and the outer circumferential wall of the first end 12 is welded to the inner wall of the mounting through hole 211. For example, referring to fig. 3 to 4, the middle portion may be formed as a mounting through hole 211, the mounting through hole 211 may be configured to penetrate the current collecting tray 2 in the thickness direction, i.e., the mounting through hole 211 may penetrate the current collecting tray 2 in the up-down direction, at least a portion of the first end 12 may extend downward into the mounting through hole 211, and the outer circumferential wall of the first end 12 may be welded to the inner wall of the mounting through hole 211 to achieve stable mounting of the first end 12 to the current collecting tray 2.

Through the arrangement, the conductive column 1 and the current collecting disc 2 can be prevented from being overlapped in a large area, the precision requirement of the cover plate assembly 100 is reduced, the conductive column 1 and the current collecting disc 2 can be welded from the lower part of the current collecting disc 2, and the welding difficulty of the current collecting disc 2 is reduced.

In some embodiments of the utility model, the conductive posts 1 extend in a first direction; in a first direction, the metal connection member 3, the cover plate 4 and the separator 5 are sequentially sleeved on the conductive column 1, and the second end 11 is adapted to be deformed under pressure so that at least a portion of the second end 11 is located on a side of the metal connection member 3 facing away from the current collecting plate 2 and is in contact with the metal connection member 3.

For example, referring to fig. 1 to 3, the conductive posts 1 may be provided to extend in a first direction, which is an up-down direction shown in fig. 3. In the first direction, the upper end of the conductive column 1 is formed into a second end 11 and the lower end is formed into a first end 12, and the outer side of the conductive column 1 is sequentially sleeved with a metal connecting piece 3, a cover plate 4 and a separator 5, wherein the metal connecting piece 3 can be electrically connected with the second end 11, and the separator 5 is used for insulating and separating the cover plate 4 from the current collecting disc 2.

Wherein a step groove may be formed on a side of the metal connection member 3 facing away from the current collecting plate 2, the step groove being disposed around the conductive post 1. After the metal connecting piece 3 is sleeved outside the conductive post 1, the second end 11 of the conductive post 1 can be extruded, so that the second end 11 is deformed under pressure, and at least one part of the second end 11 can extend into the step groove and be in contact with the metal connecting piece 3. The second end 11 is riveted with the metal connecting piece 3 to apply a downward force to the metal connecting piece 3, and the metal connecting piece 3, the first insulating piece 6, the cover plate 4, the second insulating piece 7 and the partition piece 5 are compressed, so that the assembly of the cover plate assembly 100 is realized, the contact area between the conductive column 1 and the metal connecting piece 3 can be increased, and the resistance of a conductive path can be reduced.

It can be understood that the metal connecting piece 3 and the conductive column 1 are formed in a split mode, and then the metal connecting piece 3 is sleeved on the conductive column 1, so that the conductive column 1 can rivet and limit the metal connecting piece 3, the assembly of the cover plate assembly 100 is realized, the assembly difficulty of the cover plate assembly 100 can be reduced, the surface flatness and cylindricity of the conductive column 1 are improved, and the reliability of the cover plate assembly 100 is improved.

The utility model also provides a battery cell 1000.

The battery cell 1000 according to an embodiment of the present utility model includes: the device comprises a shell 200 and a pole core, wherein an assembly hole 201 is formed in the end part of the shell 200; the pole core is arranged in the shell 200 and provided with a pole lug; according to the cap plate assembly 100 of any one of the above embodiments, the cap plate 4 is fixed to the case 200 and closes the assembly hole 201, and the current collecting plate 2 is electrically connected to the pole core.

For example, referring to fig. 6 and 7, the battery cell 1000 is provided with a case 200 and a pole core, the case 200 is formed with a receiving cavity, and an end of the case 200 in an axial direction is provided with an assembly hole 201, and the pole core is placed in the receiving cavity of the case 200 such that the case 200 can isolate the pole core from the outside, and an end of the pole core is provided with a tab.

The battery unit 1000 is further provided with a cover plate assembly 100, the cover plate assembly 100 is installed in the accommodating cavity and located between the end of the pole core and the housing 200, the cover plate 4 of the cover plate assembly 100 is connected with the housing 200, and the cover plate 4 can seal the assembly hole 201, so that the accommodating cavity is prevented from being directly communicated with the outside of the housing 200 through the assembly hole 201. The current collecting disc 2 of the cover plate assembly 100 can be welded with the lug of the pole core, so that the conductive column 1 and the metal connecting piece 3 of the cover plate assembly 100 are electrically connected with the pole core, and the conductive column 1 and the metal connecting piece 3 extend to the outer side of the shell 200, so that the pole core can be powered outwards through the metal connecting piece 3 and the conductive column 1.

According to the battery unit 1000 of the embodiment of the utility model, the first limiting part is arranged on the current collecting disc 2, and the second limiting part is arranged on the separator 5, so that the first limiting part can be matched with the second limiting part to position the separator 5, and the relative rotation between the separator 5 and the current collecting disc 2 can be avoided, thereby preventing the separator 5 from scratching the current collecting disc 2, being beneficial to improving the insulation effect of the separator 5, improving the reliability of the cover plate assembly 100 and improving the practicability of the battery unit 1000.

In some embodiments of the present utility model, the cover 4 includes a plate body 41 and a first stopping portion 42, the first stopping portion 42 is located at an outer periphery of the plate body 41, the first stopping portion 42 is located in the housing 200 and is stopped against an inner wall of the housing 200, the first stopping portion 42 is fixedly connected with the housing 200, and the plate body 41 is sleeved on the conductive post 1 and is fixedly connected with the housing 200.

For example, referring to fig. 5 and 7, the cover plate 4 includes a plate body 41 and a first stopper 42, the plate body 41 being configured in a circular ring shape such that the plate body 41 is externally sleeved outside the conductive post 1, the first stopper 42 being located at a lower side of an outer peripheral edge of the plate body 41 and extending around a circumferential direction of the plate body 41. When the cover assembly 100 is mounted to the housing 200, the first abutting portion 42 is located in the accommodating cavity of the housing 200, and the first abutting portion 42 may abut against an inner wall of the housing 200 surrounding the assembly hole 201 to position the cover assembly 100, and the first abutting portion 42 may be fixedly connected with the housing 200, such as welded, bonded, etc., so as to achieve stable mounting of the cover 4 and the housing 200. Thereby, the mounting accuracy of the cap plate assembly 100 is advantageously improved, and the reliability of the battery cell 1000 is improved.

The utility model also provides a battery pack.

The battery pack according to the embodiment of the utility model includes a plurality of battery cells 1000, and the battery cells 1000 are the battery cells 1000 according to any of the embodiments described above.

According to the battery pack disclosed by the embodiment of the utility model, the first limiting part is arranged on the current collecting disc 2, and the second limiting part is arranged on the separator 5, so that the first limiting part can be matched with the second limiting part to position the separator 5, and the relative rotation between the separator 5 and the current collecting disc 2 can be avoided, so that the separator 5 is prevented from scratching the current collecting disc 2, the insulation effect of the separator 5 is favorably improved, the reliability of the cover plate assembly 100 is improved, the practicability of the battery cell 1000 is improved, and the reliability of the battery pack is favorably improved.

The utility model also provides an electric device.

The power utilization device according to the embodiment of the utility model comprises the battery pack according to any of the above embodiments.

According to the electricity utilization device provided by the embodiment of the utility model, the first limiting part is arranged on the current collecting disc 2, and the second limiting part is arranged on the separating piece 5, so that the first limiting part can be matched with the second limiting part to position the separating piece 5, and the relative rotation between the separating piece 5 and the current collecting disc 2 can be avoided, so that the separating piece 5 is prevented from scratching the current collecting disc 2, the insulation effect of the separating piece 5 is improved, the reliability of the cover plate assembly 100 is improved, the practicability of the battery cell 1000 is improved, the reliability of a battery pack is improved, and the overall performance of the electricity utilization device is improved.

It should be noted that the electric device may be an energy storage cabinet, a vehicle, or other devices, and the type of the electric device is not limited to the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (18)

1. A cover assembly (100) of a battery cell, comprising:

the collecting disc (2), the said collecting disc (2) has the first spacing part;

-a cover plate (4), the cover plate (4) being adapted to be fixed to a housing (200) of the battery cell (1000);

the separator (5), separator (5) are located collector disc (2) with between apron (4), separator (5) are equipped with the spacing portion of second, first spacing portion with the cooperation of second spacing portion is in order to fix a position separator (5).

2. The battery cell cover assembly (100) of claim 1, wherein one of the first and second limiting portions defines a limiting gap (24) and the other defines a limiting projection (52), the limiting projection (52) extending into the limiting gap (24).

3. The cover plate assembly (100) of a battery cell according to claim 1, wherein the first limiting portions are a plurality of and are arranged at intervals along the circumferential direction of the current collecting plate (2), the second limiting portions are a plurality of, and the first limiting portions are in one-to-one fit with the second limiting portions.

4. The cover plate assembly (100) of a battery cell according to claim 1, wherein the current collecting plate (2) is provided with a welding area suitable for being electrically connected with a pole core, the separator (5) is provided with an avoidance area (51), and the avoidance area (51) is arranged opposite to the welding area so that the welding area is exposed.

5. The battery cell cover assembly (100) according to claim 4, wherein the relief area (51) and the second limit portion are provided at a spacing in the circumferential direction of the separator (5).

6. The battery cell cover assembly (100) of claim 4, wherein the current collecting tray (2) comprises a main tray body (21), a bridge edge (23) and a plurality of connecting pieces (22), wherein the main tray body (21) is provided with a plurality of connecting grooves (212) arranged at intervals, each connecting piece (22) is connected with the inner side wall of one of the connecting grooves (212) through the bridge edge (23), and each connecting piece (22) defines the welding area.

7. The battery cell cover assembly (100) according to claim 6, wherein on a first projection surface, an orthographic projection of the outer peripheral wall of the main disk body (21) is located on the first ring, the main disk body (21) is provided with a middle portion adapted to be electrically connected with the conductive post (1), the connecting groove (212) is located radially outside the middle portion in a radial direction of the main disk body (21), an orthographic projection of the bridge edge (23) on the first projection surface is located radially inside an orthographic projection of the outer peripheral edge of the connecting piece (22), and the conductive post (1) is adapted to be electrically connected with an external element.

8. The battery cell cover assembly (100) of claim 6, wherein the separator (5) is provided with a plurality of relief areas (51), and in the first direction, the plurality of relief areas (51) are disposed in one-to-one opposition to the plurality of connecting grooves (212).

9. The battery cell cover assembly (100) of any of claims 1-8, further comprising:

the novel electric current collector comprises a conductive column (1) and a metal connecting piece (3), wherein a first end (12) of the conductive column (1) is electrically connected with the middle part of the current collecting disc (2), a second end (11) of the conductive column (1) is electrically connected with the metal connecting piece (3), a first insulating piece (6) is arranged between the metal connecting piece (3) and the cover plate (4), and a second insulating piece (7) is arranged between the conductive column (1) and the cover plate (4).

10. The battery cell cover assembly (100) of claim 9, wherein a portion of the second insulator (7) is located between the cover (4) and the first end (12).

11. The battery cell cover assembly (100) of claim 10, wherein the second insulator (7) is an elastic member.

12. The battery cell cover assembly (100) according to claim 10, wherein the cover plate (4) is provided with a mounting hole (411), the conductive post (1) passes through the mounting hole (411), the first insulating member (6) is provided with an extension protrusion (61) extending into the mounting hole (411), and the extension protrusion (61) abuts against the second insulating member (7).

13. The battery cell cover assembly (100) according to claim 9, wherein the intermediate portion is formed as a mounting through hole (211) penetrating the current collecting tray (2) in a thickness direction, the first end (12) is located within the mounting through hole (211) and an outer peripheral wall of the first end (12) is welded to an inner wall of the mounting through hole (211).

14. The battery cell cover assembly (100) of claim 9, wherein the conductive posts (1) extend in a first direction;

in the first direction, the metal connecting piece (3), the cover plate (4) and the partition piece (5) are sleeved on the conductive column (1) in sequence, and the second end (11) is suitable for being pressed and deformed so that at least one part of the second end (11) is positioned on one side, away from the current collecting disc (2), of the metal connecting piece (3) and is in contact with the metal connecting piece (3).

15. A battery cell (1000), comprising:

a housing (200), wherein an assembly hole (201) is formed at the end part of the housing (200);

the pole core is arranged in the shell (200) and provided with a pole lug;

the cover plate assembly (100) according to any one of claims 1-14, the cover plate (4) being fixed to the housing (200) and closing the fitting hole (201), the collecting tray (2) being electrically connected with the pole core.

16. The battery unit (1000) according to claim 15, wherein the cover plate (4) comprises a plate body (41) and a first stopping portion (42), the first stopping portion (42) is located at the peripheral edge of the plate body (41), the first stopping portion (42) is located in the housing (200) and is stopped against the inner wall of the housing (200), the first stopping portion (42) is fixedly connected with the housing (200), and the plate body (41) is sleeved on the conductive column (1).

17. A battery pack, characterized by comprising a plurality of battery cells (1000), the battery cells (1000) being battery cells (1000) according to any of claims 15-16.

18. An electrical device comprising the battery pack of claim 17.