CN217847987U - Battery pole piece and battery - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery pole piece and battery. The battery pole piece includes the sheetmetal, is provided with the passageway on the sheetmetal, and the passageway link up the sheetmetal, and the sheetmetal includes: a pole piece region, wherein a part of the metal sheet is provided with an active substance to form the pole piece region; and the other part of the metal sheet forms a tab area, and the channel and the tab area are arranged at intervals. Through making the passageway link up the sheetmetal to can be when a plurality of battery pole pieces form electric core, the passageway of a battery pole piece can expose the utmost point ear region of another battery pole piece, and the electric core space utilization who forms through the battery pole piece is higher, can not cause the waste of battery inner space, improves the inside space utilization of battery, thereby improves the performance of battery pole piece.

Description

Battery pole piece and battery

Technical Field

The utility model relates to a battery technology field especially relates to a battery pole piece and battery.

Background

In the related art, the battery pole piece includes a pole piece and a tab, and the tab extends from the edge of the pole piece, so that the tab occupies a large amount of internal space of the battery case after the battery cell is formed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pole piece and battery to improve battery pole piece's performance.

According to the utility model discloses a first aspect provides a battery pole piece, including the sheetmetal, be provided with the passageway on the sheetmetal, the passageway link up the sheetmetal, and the sheetmetal includes:

a pole piece region, wherein a part of the metal sheet is provided with an active substance to form the pole piece region;

and the other part of the metal sheet forms a tab area, and the channel and the tab area are arranged at intervals.

The utility model discloses a battery pole piece of embodiment includes the sheetmetal, and the sheetmetal includes the passageway, the pole piece is regional and utmost point ear region, through making the passageway link up the sheetmetal to can be when a plurality of battery pole pieces form electric core, the passageway of a battery pole piece can expose the utmost point ear region of another battery pole piece, and electric core space utilization through the formation of battery pole piece is higher, can not cause the waste of battery inner space, improves the inside space utilization of battery, thereby improves the performance of battery pole piece.

According to a second aspect of the present invention, there is provided a battery, comprising an electrical core, the electrical core comprising a first battery pole piece and a second battery pole piece, the first battery pole piece comprising a first channel, a first pole piece region and a first tab region, the second battery pole piece comprising a second channel, a second pole piece region and a second tab region;

the projections of the first channel and the second lug area are at least partially overlapped, so that the first channel exposes the second lug area, and the projections of the second channel and the first lug area are at least partially overlapped, so that the second channel exposes the first lug area.

The utility model discloses a battery of embodiment includes electric core, and electric core includes first battery pole piece and second battery pole piece, and first battery pole piece and second battery pole piece superpose mutually. Through making first battery pole piece include first passageway, first pole piece region and first utmost point ear region, the second battery pole piece includes the second passageway, second pole piece region and second utmost point ear region, thereby after first battery pole piece and the superpose of second battery pole piece, the second utmost point ear region is exposed to the first passageway, the first utmost point ear region is exposed to the second passageway, thereby make first utmost point ear region and second utmost point ear region can regard as two utmost point ears of electric core, electric core space utilization is higher, can not cause the waste of battery inner space, improve the inside space utilization of battery, thereby improve the performance of battery.

Drawings

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

FIG. 1 is a schematic diagram of a battery pole piece construction according to a first exemplary embodiment;

FIG. 2 is a schematic diagram of a battery pole piece construction according to a second exemplary embodiment;

FIG. 3 is a schematic diagram of a battery pole piece construction according to a third exemplary embodiment;

fig. 4 is a schematic structural diagram of a cell according to a first exemplary embodiment;

fig. 5 is a schematic diagram illustrating a partially exploded structure of a cell according to a first exemplary embodiment;

fig. 6 is a schematic diagram of a cell according to a second exemplary embodiment;

fig. 7 is a schematic diagram illustrating a partially exploded structure of a battery cell according to a second exemplary embodiment;

fig. 8 is a schematic diagram of a cell according to a third exemplary embodiment;

fig. 9 is a schematic diagram illustrating a partially exploded structure of a battery cell according to a third exemplary embodiment;

fig. 10 is a schematic diagram showing a cross-sectional structure of a battery according to an exemplary embodiment.

The reference numerals are explained below:

10. a metal sheet; 11. a channel; 12. a pole piece region; 13. a tab area; 20. a first battery pole piece; 21. a first channel; 22. a first pole piece region; 23. a first tab region; 30. a second battery pole piece; 31. a second channel; 32. a second pole piece region; 33. a second tab region; 40. a diaphragm; 41. a first through hole; 42. a second perforation; 50. a first electrode lead-out structure; 60. and a second electrode lead-out structure.

Detailed Description

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

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

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

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the utility model provides a battery pole piece, please refer to fig. 1 to fig. 3, battery pole piece includes sheetmetal 10, is provided with passageway 11 on the sheetmetal 10, and passageway 11 link up sheetmetal 10, and sheetmetal 10 includes: a pole piece region 12, a part of the metal sheet 10 is provided with an active material to form the pole piece region 12; a tab region 13, another portion of the metal sheet 10 forming the tab region 13, the channels 11 being spaced from the tab region 13.

The utility model discloses a battery pole piece of embodiment includes sheetmetal 10, sheetmetal 10 includes passageway 11, pole piece region 12 and utmost point ear region 13, through making passageway 11 link up sheetmetal 10, thereby can be when a plurality of battery pole pieces form electric core, passageway 11 of a battery pole piece can expose utmost point ear region 13 of another battery pole piece, electric core space utilization who forms through battery pole piece is higher, can not cause the waste of battery inner space, improve the inside space utilization of battery, thereby improve battery pole piece's performance.

It should be noted that the battery pole piece is used to form the battery core, and the battery pole piece may be a positive battery pole piece, or the battery pole piece may be a negative battery pole piece, and when the battery core is formed, the positive battery pole piece and the negative battery pole piece are selected and stacked, so that the battery core is formed in a winding or stacking direction. The channel 11 on the positive electrode battery pole piece can expose the tab area 13 on the negative electrode battery pole piece, namely the tab area 13 on the negative electrode battery pole piece is used as a negative electrode tab, the channel 11 on the negative electrode battery pole piece can expose the tab area 13 on the positive electrode battery pole piece, namely the tab area 13 on the positive electrode battery pole piece is used as a positive electrode tab, and the negative electrode tab and the positive electrode tab can be used as two electrode leading-out ends of the battery cell so as to be used for charging and discharging of the battery cell.

Considering that the channel 11 on the positive electrode battery pole piece can expose the tab area 13 on the negative electrode battery pole piece, and the channel 11 on the negative electrode battery pole piece can expose the tab area 13 on the positive electrode battery pole piece, therefore, in the electric core formed after the positive electrode battery pole piece and the negative electrode battery pole piece are stacked, the positive electrode tab and the negative electrode tab are integrated on the inner side of the electric core, and the positive electrode tab and the negative electrode tab are different from the edge of the electric core main body in the related technology, therefore, the extra space does not need to be reserved specially for the positive electrode tab and the negative electrode tab after the electric core formed by the battery pole pieces in the embodiment is placed inside the battery shell, so that the space utilization rate of the battery is improved, and the capacity density of the battery is improved.

Taking the metal sheet 10 with a substantially rectangular structure as an example, after the positive electrode plate and the negative electrode plate are laminated to form the battery core, the battery core has a substantially rectangular structure, and the positive electrode tab and the negative electrode tab can be respectively filled in the two channels 11.

One portion of the sheet metal 10 is provided with an active material to form a pole piece region 12 and another portion of the sheet metal 10 forms a tab region 13, i.e. the pole piece region 12 includes an active material and the tab region 13 does not include an active material. The sheet metal 10 may be provided with an active material as a whole, and then a portion of the active material is milled away by laser to expose the body of the sheet metal 10, thereby serving as the tab region 13. The metal sheet 10 may be a foil, for example, an aluminum foil, a copper foil, or the like. The active material may include a positive active material, that is, when the metal sheet 10 is provided with the positive active material, the metal sheet 10 forms a positive battery pole piece. The active material may comprise a negative active material, i.e. when the metal sheet 10 is provided with a negative active material, the metal sheet 10 forms a negative battery pole piece.

In one embodiment, the channels 11 of one battery pole piece may expose the tab regions 13 of another battery pole piece. Further, the channel 11 of one battery pole piece may be used to receive the tab area of another battery pole piece, in which case the channel 11 may directly expose the tab area, or at least a portion of the tab area may be located within the channel 11.

In one embodiment, the area of the channel 11 is not smaller than that of the tab region 13, so that the channel 11 of one battery pole piece can completely expose the tab region 13 of another battery pole piece, thereby ensuring that the tab region 13 has a sufficient connection area when being connected with an external component. The area of the channel 11 may be equal to the area of the tab region 13, or the area of the channel 11 may be greater than the area of the tab region 13.

The tab region 13 may be connected to the electrode leading structure, for example, the tab region 13 may be connected to the electrode assembly, or the tab region 13 may be connected to the battery case, and the tab region 13 of one battery pole piece is completely exposed through the channel 11 of the other battery pole piece, so that the tab region 13 may have a sufficient contact area when being connected to the electrode leading structure, thereby ensuring the connection stability.

In one embodiment, at least one of the channels 11 and tab regions 13 is provided at the end of the sheet metal 10 to intersect the outer edge of the sheet metal 10, thereby facilitating the formation of the channels 11 or tab regions 13 and also facilitating the connection of subsequently formed tabs with electrode lead-out structures.

At least one of the channel 11 and the tab region 13 is disposed at an end of the metal sheet 10, and taking the case that the channel 11 is disposed at an end of the metal sheet 10, when the metal sheet 10 is substantially rectangular, a part of material is cut off at one end of the rectangular structure, so as to form the channel 11, and the channel may include three wall surfaces surrounding a U shape, or the channel may include two wall surfaces in an L shape.

In one embodiment, as shown in fig. 1, the channel 11 and the tab region 13 are respectively located at two opposite ends of the metal sheet 10, so that after a plurality of battery pole pieces form a battery cell, a positive tab and a negative tab can be respectively located at two opposite ends of the battery cell, thereby facilitating the connection of the positive tab and the negative tab with the positive electrode lead-out structure and the negative electrode lead-out structure, respectively.

In one embodiment, as shown in fig. 2, the channel 11 and the tab region 13 are both located in the middle of the metal sheet 10, and after the plurality of battery pole pieces form a battery cell, the positive tab and the negative tab are located in the middle region of the battery cell, so that the positive tab and the negative tab can be conveniently connected with the positive electrode lead-out structure and the negative electrode lead-out structure, and the positive electrode lead-out structure and the negative electrode lead-out structure can be arranged at relatively flexible positions.

In one embodiment, as shown in fig. 3, the channel 11 and the tab area 13 are both located at the end of the metal sheet 10, and the channel 11 and the tab area 13 are both located at one side of the metal sheet 10, so that after multiple battery pole pieces are formed into a cell, the positive tab and the negative tab can be located at the same end of the cell.

In one embodiment, the channel 11 and the tab region 13 are symmetrically arranged about the center of the midpoint of the metal sheet 10, so that the arrangement of the channel 11 and the tab region 13 is more reasonable, the space of the metal sheet 10 can be utilized to the greatest extent, and the use requirement of a subsequently formed battery cell is met.

It should be noted that the channels 11 and the tab region 13 are symmetrically arranged about the center of the midpoint of the metal sheet 10, that is, after the channels 11 are rotated 180 degrees around the midpoint of the metal sheet 10, the channels 11 and the tab region 13 coincide.

An embodiment of the present invention further provides a battery, please refer to fig. 4 to 10, the battery includes an electric core, the electric core includes a first battery pole piece 20 and a second battery pole piece 30, the first battery pole piece 20 includes a first channel 21, a first pole piece region 22 and a first tab region 23, the second battery pole piece 30 includes a second channel 31, a second pole piece region 32 and a second tab region 33; wherein the first channel 21 and the second tab area 33 are projected to at least partially coincide such that the first channel 21 exposes the second tab area 33, and the second channel 31 and the first tab area 23 are projected to at least partially coincide such that the second channel 31 exposes the first tab area 23.

The utility model discloses a battery of an embodiment includes electric core, and electric core includes first battery pole piece 20 and second battery pole piece 30, and first battery pole piece 20 and second battery pole piece 30 superpose mutually. The first battery pole piece 20 comprises the first channel 21, the first pole piece area 22 and the first pole lug area 23, and the second battery pole piece 30 comprises the second channel 31, the second pole piece area 32 and the second pole lug area 33, so that after the first battery pole piece 20 and the second battery pole piece 30 are superposed, the second pole lug area 33 is exposed by the first channel 21, and the first pole lug area 23 is exposed by the second channel 31, so that the first pole lug area 23 and the second pole lug area 33 can be used as two pole lugs of a battery cell, the space utilization rate of the battery cell is high, the waste of the internal space of the battery is not caused, the space utilization rate of the internal space of the battery is improved, and the service performance of the battery is improved.

It should be noted that, the projection of the first channel 21 and the projection of the second tab area 33 at least partially overlap, that is, after the first battery pole piece 20 and the second battery pole piece 30 are overlapped, the first channel 21 exposes the second tab area 33, correspondingly, the projection of the second channel 31 and the projection of the first tab area 23 at least partially overlap, and the second channel 31 exposes the first tab area 23, so that the first tab area 23 and the second tab area 33 can serve as two tabs of the battery cell. The first battery pole piece 20 and the second battery pole piece 30 are overlapped, and the projections of the first channel 21 and the second tab region 33 at least partially overlap, that is, along the overlapping direction of the first battery pole piece 20 and the second battery pole piece 30, the orthographic projections of the first channel 21 and the second tab region 33 at least partially overlap.

In one embodiment, the battery cell further includes a separator 40, the separator 40 is located between the first battery pole piece 20 and the second battery pole piece 30, the separator 40 is provided with a first perforation 41 and a second perforation 42, the first perforation 41 is located between the first channel 21 and the second tab area 33, so that the first perforation 41 and the first channel 21 expose the second tab area 33, and the second perforation 42 is located between the second channel 31 and the first tab area 23, so that the second perforation 42 and the second channel 31 expose the first tab area 23. The first battery pole piece 20 comprises the first channel 21, the first pole piece area 22 and the first pole lug area 23, the second battery pole piece 30 comprises the second channel 31, the second pole piece area 32 and the second pole lug area 33, the diaphragm 40 is provided with the first perforation 41 and the second perforation 42, so that after the first battery pole piece 20, the diaphragm 40 and the second battery pole piece 30 are superposed, the first perforation 41 and the first channel 21 expose the second pole lug area 33, and the second perforation 42 and the second channel 31 expose the first pole lug area 23, so that the first pole lug area 23 and the second pole lug area 33 can be used as two pole lugs of a battery cell, the space utilization rate of the battery cell is high, the waste of the internal space of the battery is avoided, the space utilization rate of the internal part of the battery is improved, and the service performance of the battery is improved.

It should be noted that the first battery pole piece 20, the second battery pole piece 30 and the diaphragm 40 may form a cell by winding, in this case, the first battery pole piece 20 may include a plurality of first channels 21 and a first tab region 23, the second battery pole piece 30 may include a plurality of second channels 31 and a second tab region 33, and the diaphragm 40 may include a plurality of first perforations 41 and a plurality of second perforations 42. Or, the first battery pole piece 20, the second battery pole piece 30, and the diaphragm 40 may form a cell through a lamination direction, at this time, the cell may include a plurality of first battery pole pieces 20, second battery pole pieces 30, and diaphragms 40, and the cell is formed by circularly placing and laminating the plurality of first battery pole pieces 20, the diaphragms 40, and the second battery pole pieces 30. The first tab regions 23 of the cells are connected, and the second tab regions 33 of the cells are connected.

One of the first and second pole piece regions 22 and 32 is provided with a positive electrode active material, and the other is provided with a negative electrode active material. For example, the first battery pole piece 20 is a positive battery pole piece, the first pole piece region 22 is provided with a positive active material, the second battery pole piece 30 is a negative battery pole piece, and the second pole piece region 32 is provided with a negative active material. Alternatively, the first battery pole piece 20 is a negative battery pole piece, the second pole piece region 32 is provided with a positive active material, the second battery pole piece 30 is a positive battery pole piece, and the second pole piece region 32 is provided with a positive active material. The types of the positive electrode active material and the negative electrode active material are not limited. In one embodiment, the first channel 21 is spaced apart from the first tab region 23, and the second channel 31 is spaced apart from the second tab region 33, so as to ensure a certain distance between the positive and negative tabs of the cell after the cell is formed, thereby ensuring reliable insulation between the positive and negative tabs.

In one embodiment, the area of the first passage 21 is not less than that of the first tab region 23, the area of the second passage 31 is not less than that of the second tab region 33, the area of the first penetration hole 41 is not less than that of the first tab region 23, and the area of the second penetration hole 42 is not less than that of the second tab region 33, so that the first penetration hole 41 and the first passage 21 can completely expose the second tab region 33, and the second penetration hole 42 and the second passage 31 can completely expose the first tab region 23, thereby enabling the first tab region 23 and the second tab region 33 to have a sufficient connection area when connected with an external component.

The area of the first channel 21 may be equal to the area of the first tab region 23, the area of the second channel 31 may be equal to the area of the second tab region 33, the area of the first penetration hole 41 may be equal to the area of the first tab region 23, and the area of the second penetration hole 42 may be equal to the area of the second tab region 33. Alternatively, the area of the first passage 21 may be greater than that of the first tab region 23, the area of the second passage 31 may be greater than that of the second tab region 33, the area of the first perforation 41 may be greater than that of the first tab region 23, and the area of the second perforation 42 may be greater than that of the second tab region 33.

In one embodiment, at least one of the first channel 21 and the first tab region 23 is disposed at an end of the first battery pole piece 20 to intersect with an outer edge of the first battery pole piece 20, and at least one of the second channel 31 and the second tab region 33 is disposed at an end of the second battery pole piece 30 to intersect with an outer edge of the second battery pole piece 30, so that formation of the first channel 21 and the first tab region 23, formation of the second channel 31 and the second tab region 33, and connection of subsequently formed tabs and electrode lead-out structures can be facilitated.

In one embodiment, as shown in fig. 4 and 5, the first channel 21 and the first tab area 23 are located at two opposite ends of the first battery pole piece 20, and the second channel 31 and the second tab area 33 are located at two opposite ends of the second battery pole piece 30, so that the first tab area 23 and the second tab area 33 of the cell can be located at two opposite ends of the cell, thereby facilitating the connection between the first tab area 23 and the second tab area 33 and the positive electrode lead-out structure and the negative electrode lead-out structure, respectively.

In one embodiment, as shown in fig. 6 and 7, the first channel 21 and the first tab area 23 are both located in the middle of the first battery pole piece 20, and the second channel 31 and the second tab area 33 are both located in the middle of the second battery pole piece 30, so that the first tab area 23 and the second tab area 33 of the battery cell can be located in the middle of the battery cell, the first tab area 23 and the second tab area 33 are conveniently connected to the positive electrode lead-out structure and the negative electrode lead-out structure, and the arrangement positions of the positive electrode lead-out structure and the negative electrode lead-out structure can be relatively flexible.

In one embodiment, as shown in fig. 8 and 9, the first channel 21 is disposed to intersect with the first tab area 23, and the second channel 31 is disposed to intersect with the second tab area 33, so that the first tab area 23 and the second tab area 33 of the cell can be located on the same side of the cell, but it is necessary to ensure that the first tab area 23 and the second tab area 33 are disposed in an insulating manner, that is, a certain distance is required between the first tab area 23 and the second tab area 33.

It should be noted that the first tab region 23 and the second tab region 33 shown in fig. 8 are substantially in contact with each other, but after the first tab region 23 and the second tab region 33 of the cell are actually formed, the first tab region 23 and the second tab region 33 need to have a certain distance therebetween, so as to avoid communication between the first tab region 23 and the second tab region 33. Or, an insulation treatment may be performed between the first tab region 23 and the second tab region 33, which is not limited herein, but emphasizes that insulation needs to be maintained between the first tab region 23 and the second tab region 33, so as to avoid cell short circuit.

In one embodiment, the first channel 21 and the first tab region 23 are symmetrically disposed about the midpoint of the first cell pole piece 20, and the second channel 31 and the second tab region 33 are symmetrically disposed about the midpoint of the second cell pole piece 30, so that the first channel 21 and the first tab region 23 can be more reasonably arranged, the second channel 31 and the second tab region 33 can be more reasonably arranged, and the space between the first cell pole piece 20 and the second cell pole piece 30 can be utilized to the maximum extent.

In one embodiment, the battery further comprises: a first electrode lead-out structure 50, the first electrode lead-out structure 50 being electrically connected to the first tab region 23; and the second electrode leading-out structure 60, the second electrode leading-out structure 60 and the second tab region 33 are electrically connected, and the first electrode leading-out structure 50 and the second electrode leading-out structure 60 can be used as the charging and discharging ends of the battery.

At least one of the first electrode lead out structure 50 and the second electrode lead out structure 60 may comprise a pole assembly. Alternatively, at least one of the first electrode lead-out structure 50 and the second electrode lead-out structure 60 may include an interposer, or at least one of the first electrode lead-out structure 50 and the second electrode lead-out structure 60 may include a battery case. The first and second electrode lead-out structures 50 and 60 may be welded with the first and second tab regions 23 and 33, respectively.

In an embodiment, as shown in fig. 10, the first electrode leading-out structure 50 is a first housing member, the second electrode leading-out structure 60 is a second housing member, the first housing member and the second housing member are connected in an insulating manner to seal the electric core, and the first housing member can be used as a charging and discharging end of the battery on the basis of realizing the sealing of the electric core, so that the internal electrical connection of the battery is simplified, and the space utilization rate inside the battery is further improved.

One of the first and second casing members may be a cover plate, and as shown in fig. 10, the first electrode lead-out structure 50 is a first casing member, which may be a cover plate. An insulating sealing structure may be arranged between the first housing part and the second housing part, or an insulating coating may be arranged between the first housing part and the second housing part, so that an insulating connection of the first housing part and the second housing part is ensured. The first and second housing pieces and the first and second tab regions 23 and 33 may be connected by other conductive structures, for example, an interposer, as long as the connection of the first and second housing pieces and the first and second tab regions 23 and 33 is conveniently achieved, and the connection is not limited herein.

It should be noted that the polarities of the first battery pole piece 20 and the second battery pole piece 30 are opposite, that is, one is a positive battery pole piece, and the other is a negative battery pole piece.

An embodiment of the utility model also provides a group battery, and the group battery includes above-mentioned battery.

The utility model discloses the battery of group battery of an embodiment includes electric core, and electric core includes first battery pole piece 20 and second battery pole piece 30, and first battery pole piece 20 and second battery pole piece 30 superpose mutually. By enabling the first battery pole piece 20 to comprise the first channel 21, the first pole piece area 22 and the first pole lug area 23, and enabling the second battery pole piece 30 to comprise the second channel 31, the second pole piece area 32 and the second pole lug area 33, after the first battery pole piece 20 and the second battery pole piece 30 are superposed, the second pole lug area 33 is exposed by the first channel 21, and the first pole lug area 23 is exposed by the second channel 31, so that the first pole lug area 23 and the second pole lug area 33 can be used as two pole lugs of a battery cell, the space utilization rate of the battery cell is high, the waste of the internal space of the battery can not be caused, the space utilization rate of the internal space of the battery is improved, and the service performance of the battery pack is improved.

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

The battery module includes a plurality of batteries, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries.

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

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

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

Claims (19)

1. A battery pole piece, characterized in that, including sheet metal (10), be provided with passageway (11) on sheet metal (10), passageway (11) link up sheet metal (10), sheet metal (10) includes:

a pole piece region (12), a portion of the metal sheet (10) being provided with an active substance to form the pole piece region (12);

the electrode lug region (13), another part of the metal sheet (10) forms the electrode lug region (13), and the channel (11) and the electrode lug region (13) are arranged at intervals.

2. The battery pole piece according to claim 1, characterized in that the area of the channel (11) is not smaller than the area of the tab region (13).

3. The battery pole piece according to claim 1, characterized in that at least one of the channels (11) and the tab region (13) is provided at the end of the metal sheet (10) to intersect the outer edge of the metal sheet (10).

4. The battery pole piece according to claim 3, characterized in that the channels (11) and the tab regions (13) are located at opposite ends of the metal sheet (10), respectively.

5. The battery pole piece according to claim 1, characterized in that the channels (11) and the tab regions (13) are located in the middle of the metal sheet (10).

6. The battery pole piece according to one of claims 3 to 5, characterized in that the channels (11) and the tab regions (13) are arranged symmetrically with respect to the center of the midpoint of the metal sheet (10).

7. The battery pole piece according to any one of claims 1 to 5, characterized in that the channel (11) is used to accommodate a tab region of another battery pole piece.

8. A battery, characterized by comprising a cell comprising a first battery pole piece (20) and a second battery pole piece (30), the first battery pole piece (20) comprising a first channel (21), a first pole piece region (22), and a first tab region (23), the second battery pole piece (30) comprising a second channel (31), a second pole piece region (32), and a second tab region (33);

wherein the first channel (21) and the second tab area (33) projection at least partially coincide such that the first channel (21) exposes the second tab area (33), the second channel (31) and the first tab area (23) projection at least partially coincide such that the second channel (31) exposes the first tab area (23).

9. The battery of claim 8, wherein the first channel (21) is spaced from the first tab region (23) and the second channel (31) is spaced from the second tab region (33).

10. The battery according to claim 8, wherein the area of the first channel (21) is not smaller than the area of the first tab region (23), and the area of the second channel (31) is not smaller than the area of the second tab region (33).

11. The battery according to claim 8, wherein at least one of the first channel (21) and the first tab region (23) is disposed at an end of the first battery pole piece (20) to intersect with an outer edge of the first battery pole piece (20), and at least one of the second channel (31) and the second tab region (33) is disposed at an end of the second battery pole piece (30) to intersect with an outer edge of the second battery pole piece (30).

12. The battery according to claim 11, wherein the first channel (21) and the first tab region (23) are located at opposite ends of the first battery pole piece (20), and the second channel (31) and the second tab region (33) are located at opposite ends of the second battery pole piece (30).

13. The battery according to claim 8, wherein the first channel (21) and the first tab region (23) are located in the middle of the first battery pole piece (20), and the second channel (31) and the second tab region (33) are located in the middle of the second battery pole piece (30).

14. The battery according to any one of claims 11 to 13, characterized in that the first channel (21) and the first tab region (23) are arranged symmetrically with respect to the center of the midpoint of the first battery pole piece (20), and the second channel (31) and the second tab region (33) are arranged symmetrically with respect to the center of the midpoint of the second battery pole piece (30).

15. The battery according to claim 8, wherein the first channel (21) is disposed intersecting the first tab region (23) and the second channel (31) is disposed intersecting the second tab region (33).

16. The battery of claim 8, further comprising:

a first electrode lead-out structure (50), the first electrode lead-out structure (50) being electrically connected to the first tab region (23);

a second electrode lead-out structure (60), the second electrode lead-out structure (60) being electrically connected with the second tab region (33).

17. The battery of claim 16, wherein the first electrode lead-out structure (50) is a first housing piece and the second electrode lead-out structure (60) is a second housing piece, the first and second housing pieces being insulatively connected to seal the cell.

18. The battery of any of claims 8 to 13, wherein the cell further comprises a separator (40), the separator (40) being located between the first and second battery pole pieces (20, 30), the separator (40) having a first perforation (41) and a second perforation (42) disposed thereon, the first perforation (41) being located between the first channel (21) and the second tab region (33) such that the first perforation (41) and the first channel (21) expose the second tab region (33), the second perforation (42) being located between the second channel (31) and the first tab region (23) such that the second perforation (42) and the second channel (31) expose the first tab region (23).

19. The battery according to claim 18, wherein the area of the first perforation (41) is not smaller than the area of the first tab region (23), and the area of the second perforation (42) is not smaller than the area of the second tab region (33).

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