CN218039722U

CN218039722U - Battery with a battery cell

Info

Publication number: CN218039722U
Application number: CN202222053413.9U
Authority: CN
Inventors: 孙倩倩; 齐彬伟; 张璐璐
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-12-13
Anticipated expiration: 2032-08-04

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery case; the battery comprises a battery cell, a first electrode lug and a second electrode lug, wherein the battery cell is arranged in a battery shell, and the first electrode lug and the second electrode lug extend out from the same side of a battery cell main body; the first current collecting piece is at least partially arranged in the battery shell and is connected with the first pole lug; the second current collecting piece is at least partially arranged in the battery shell and is connected with the second lug; first utmost point ear and second utmost point ear extend out by electric core main part towards the same one side of first mass flow piece and second mass flow piece, and the minimum distance between first mass flow piece and the electric core main part is not less than the minimum distance between second mass flow piece and the electric core main part, and the thickness of first mass flow piece is greater than the thickness of second mass flow piece for first mass flow piece and second mass flow piece arrange more rationally, make things convenient for first utmost point ear and second utmost point ear to be connected with first mass flow piece and second mass flow piece respectively, thereby reduce the assembly degree of difficulty of battery.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

In the related art, the battery core of the battery has tabs at two sides, that is, the positive electrode tab and the negative electrode tab are respectively located at two ends of the battery core. However, the lugs on the two sides occupy a larger space inside the battery, so that the utilization rate of the whole space inside the battery is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery case;

the battery comprises a battery cell, wherein the battery cell is arranged in a battery shell and comprises a battery cell main body, a first lug and a second lug, and the first lug and the second lug extend out from the same side of the battery cell main body;

the first current collecting piece is at least partially arranged in the battery shell and is connected with the first pole lug;

the second current collecting piece is at least partially arranged in the battery shell and is connected with the second lug;

the first tab and the second tab extend out from the same side of the cell body towards the first current collecting piece and the second current collecting piece, the minimum distance between the first current collecting piece and the cell body is not smaller than the minimum distance between the second current collecting piece and the cell body, and the thickness of the first current collecting piece is larger than that of the second current collecting piece.

The utility model discloses battery includes battery case, electric core, first mass flow piece and second mass flow piece, and the first utmost point ear and the second utmost point ear of electric core are connected with first mass flow piece and second mass flow piece respectively. Because first utmost point ear and second utmost point ear extend by the same one side of electric core main part to can avoid first utmost point ear and second utmost point ear to occupy too much high space, with this space utilization who improves the battery, thereby improve the performance of battery. And the minimum distance between first mass flow piece and the electric core main part is not less than the minimum distance between second mass flow piece and the electric core main part, and the thickness of first mass flow piece is greater than the thickness of second mass flow piece to can make arranging of first mass flow piece and second mass flow piece more reasonable, with this make things convenient for first utmost point ear and second utmost point ear to be connected with first mass flow piece and second mass flow piece respectively, thereby reduce the assembly degree of difficulty 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 shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partially exploded structure of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram of a partial cross-sectional structure of a battery according to an exemplary embodiment;

FIG. 4 is a schematic diagram illustrating a portion of the structure of a battery according to one exemplary embodiment;

FIG. 5 is a schematic diagram of a partially exploded structure of a battery according to another exemplary embodiment;

FIG. 6 is a schematic diagram of a partial cross-sectional structure of a battery according to another exemplary embodiment;

fig. 7 is a schematic view showing a partial structure of a battery according to another exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a first housing member; 12. a second housing member; 20. an electric core; 21. a cell main body; 22. a first tab; 23. a second tab; 30. a first current collecting member; 40. a second current collecting member; 50. a first pole assembly; 60. a second pole post assembly; 70. an insulating member; 71. a first insulating member; 72. a second insulating member; 73. and a third insulating member.

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, so it should 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 explicitly specified or limited otherwise, the terms "first", "second", and the like 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 encompass, for example, 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 as a specific case by a person skilled in the art.

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

An embodiment of the present invention provides a battery, please refer to fig. 1 to 4, the battery includes: a battery case 10; the battery comprises a battery cell 20, the battery cell 20 is disposed in the battery case 10, the battery cell 20 includes a battery cell main body 21, a first tab 22 and a second tab 23, and the first tab 22 and the second tab 23 extend from the same side of the battery cell main body 21; a first current collecting member 30, at least a portion of the first current collecting member 30 being disposed in the battery case 10, the first current collecting member 30 being connected to the first tab 22; a second current collector 40, at least a portion of the second current collector 40 being disposed within the battery case 10, the second current collector 40 being connected to the second tab 23; the first tab 22 and the second tab 23 extend out from the cell body 21 toward the same side of the first current collecting piece 30 and the second current collecting piece 40, the minimum distance between the first current collecting piece 30 and the cell body 21 is not less than the minimum distance between the second current collecting piece 40 and the cell body 21, and the thickness of the first current collecting piece 30 is greater than that of the second current collecting piece 40.

The battery of an embodiment of the present invention includes a battery case 10, a battery cell 20, a first current collector 30 and a second current collector 40, wherein the first tab 22 and the second tab 23 of the battery cell 20 are respectively connected to the first current collector 30 and the second current collector 40. Because the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, the first tab 22 and the second tab 23 can be prevented from occupying too much height space, so that the space utilization rate of the battery is improved, and the service performance of the battery is improved. The minimum distance between the first current collecting piece 30 and the battery cell main body 21 is not smaller than the minimum distance between the second current collecting piece 40 and the battery cell main body 21, and the thickness of the first current collecting piece 30 is larger than that of the second current collecting piece 40, so that the arrangement of the first current collecting piece 30 and the second current collecting piece 40 is more reasonable, the first tab 22 and the second tab 23 are conveniently connected with the first current collecting piece 30 and the second current collecting piece 40 respectively, and the assembly difficulty of the battery is reduced.

It should be noted that, the first tab 22 and the second tab 23 extend from the battery cell main body 21 toward the same side of the first current collecting piece 30 and the second current collecting piece 40, so that the same-side extraction of the first tab 22 and the second tab 23 can be realized, and compared with the related art in which tabs are extracted from both sides, the same-side extraction of the first tab 22 and the second tab 23 in this embodiment can reduce the height space occupancy rate of the tabs, thereby improving the space utilization rate of the battery, and further improving the energy density of the battery.

The minimum distance between the first current collector 30 and the cell body 21 may be no less than the minimum distance between the second current collector 40 and the cell body 21, that is, the distance between the side of the first current collector 30 facing the cell body 21 and the side of the cell body 21 facing the first current collector 30 may be equal to the distance between the side of the second current collector 40 facing the cell body 21 and the side of the cell body 21 facing the second current collector 40, or the distance between the side of the first current collector 30 facing the cell body 21 and the side of the cell body 21 facing the first current collector 30 may be greater than the distance between the side of the second current collector 40 facing the cell body 21 and the side of the cell body 21 facing the second current collector 40, that is, the first current collector 30 and the second current collector 40 may be configured to be arranged up and down, and the thickness of the first current collector 30 is greater than the thickness of the second current collector 40, that is, the thickness of the second current collector 40 may be relatively small, so that the connection of the second current collector 40 to the second pole ear 23 may be facilitated, for example, the second current collector 40 may be welded to the pole ear 23.

In one embodiment, the first tab 22 is a positive tab, the second tab 23 is a negative tab, the first current collecting member 30 is a positive current collecting member, the second current collecting member 40 is a negative current collecting member, the positive current collecting member may be aluminum, and the negative current collecting member may be copper, which is difficult to bend and weld compared to aluminum, and the thickness of the negative current collecting member is less than that of the positive current collecting member, which can avoid the problem of difficult welding of the negative current collecting member, thereby improving the assembly efficiency of the battery.

In one embodiment, the first tab 22 is an anode tab, the first tab 22 is an aluminum tab, the second tab 23 is a cathode tab, and the second tab 23 is a copper tab, so as to meet the material requirement of the battery, the anode current collecting member may be aluminum, and the cathode current collecting member may be copper, which can facilitate the welding of the anode tab and the cathode tab with the anode current collecting member and the cathode current collecting member, respectively, and ensure the welding stability of the anode tab and the cathode tab with the anode current collecting member and the cathode current collecting member, respectively, thereby avoiding the problem of connection failure.

In one embodiment, the first current collecting member 30 and the second current collecting member 40 form a height difference, the first current collecting member 30 is higher than the second current collecting member 40, and the end of the first tab 22 far away from the cell main body 21 is arranged beyond the end of the second tab 23 far away from the cell main body 21, so that the first tab 22 and the second tab 23 can be conveniently and electrically connected with the first current collecting member 30 and the second current collecting member 40 respectively.

In one embodiment, the length of the first tab 22 extending from the cell body 21 is greater than the length of the second tab 23 extending from the cell body 21, so that the end of the first tab 22 away from the cell body 21 can be disposed beyond the end of the second tab 23 away from the cell body 21, and further the first current collecting member 30 and the second current collecting member 40 with a height difference can be formed in a matching manner, thereby achieving connection between the first current collecting member 30 and the second current collecting member 40 and the first tab 22 and the second tab 23.

The first tab 22 is a positive tab, the second tab 23 is a negative tab, the length of the negative tab is relatively small, and the thickness of the negative current collecting piece is relatively small, so that the assembly difficulty of the negative tab and the negative current collecting piece can be reduced, and the negative tab and the negative current collecting piece are conveniently electrically connected.

In one embodiment, as shown in fig. 2 and 3, the battery further includes: the first pole assembly 50, the first pole assembly 50 is arranged on the battery shell 10, and the first pole assembly 50 is connected with the first current collecting piece 30; second pole subassembly 60, second pole subassembly 60 set up in battery housing 10, and second pole subassembly 60 is connected with second mass flow piece 40 to can make first pole subassembly 50 and second pole subassembly 60 draw forth the end as two electrodes of battery respectively, with this makes things convenient for uniting of follow-up battery, thereby improves the packaging efficiency of group battery.

When a plurality of batteries are grouped, two adjacent batteries can be connected in series or in parallel through the busbar, and can be conveniently connected with the busbar by being provided with the first pole post assembly 50 and the second pole post assembly 60.

In one embodiment, the first pole assembly 50 and the second pole assembly 60 may be spaced apart on the battery case 10 to form a connection with the first current collector 30 and the second current collector 40, respectively, for example, the first pole assembly 50 and the second pole assembly 60 may be located on opposite sides of a central region of the battery case 10, respectively, to facilitate the arrangement of the first pole assembly 50 and the second pole assembly 60, and to make full use of an external space of the battery case 10.

In one embodiment, as shown in fig. 1 and 3, the second pole assembly 60 is disposed through the first pole assembly 50; wherein, insulating setting between first utmost point post subassembly 50 and the second utmost point post subassembly 60, on the basis of guaranteeing first utmost point post subassembly 50 and the reliable insulation of second utmost point post subassembly 60, also can improve the integrated level of first utmost point post subassembly 50 and second utmost point post subassembly 60 to improve the intensive degree of battery to this improves the energy density of battery.

Second pole subassembly 60 wears to locate in first pole subassembly 50, the inside through-hole that is provided with of first pole subassembly 50 promptly, and second pole subassembly 60 wears to locate in the through-hole, thereby can make first pole subassembly 50 and second pole subassembly 60 integrated together, and carry out insulation treatment between first pole subassembly 50 and the second pole subassembly 60, can guarantee that first pole subassembly 50 and second pole subassembly 60 can be regarded as positive and negative electrode and draw forth the charge-discharge that the end realized the battery.

In one embodiment, at least one of the first and second

pole post assemblies

50, 60 may be provided with a coating thereon, which may be aluminum oxide (Al) ₂ O ₃ ) Zirconium oxide (ZrO) ₂ ) And the like, thereby serving to achieve insulation between the first pole assembly 50 and the second pole assembly 60.

In one embodiment, as shown in fig. 3, an insulator 70 is disposed between the first pole assembly 50 and the second pole assembly 60; wherein, the spacing connection of at least one of first utmost point post subassembly 50 and second utmost point post subassembly 60 and insulating part 70, on insulating part 70 realized reliably insulating the basis to first utmost point post subassembly 50 and second utmost point post subassembly 60, also can make insulating part 70 and first utmost point post subassembly 50 and second utmost point post subassembly 60 form reliable fixed connection to this insulating properties who guarantees insulating part 70.

The insulator 70 may be plastic, for example, the insulator 70 may be an injection molded part, and after forming the first and

second pole assemblies

50, 60, the insulator 70 may be injection molded directly between the first and

second pole assemblies

50, 60. Alternatively, the insulator 70 may be a rubber structure that forms an insulating seal by sandwiching the rubber structure between the first pole assembly 50 and the second pole assembly 60. Alternatively, the insulator 70 may be a glass-related material, thereby providing an insulating seal to the glass between the first pole assembly 50 and the second pole assembly 60.

In one embodiment, the insulating member 70 is integrally formed with at least one of the first pole assembly 50 and the second pole assembly 60, so that the coupling stability of the insulating member 70 with at least one of the first pole assembly 50 and the second pole assembly 60 can be ensured and the assembly efficiency of the battery can be improved.

After first utmost point post subassembly 50 and the shaping of second utmost point post subassembly 60 are accomplished, can mould plastics between first utmost point post subassembly 50 and second utmost point post subassembly 60 and form insulating part 70 to this integrated into one piece that realizes insulating part 70 and first utmost point post subassembly 50 and second utmost point post subassembly 60 is connected, guarantees the inseparable laminating of insulating part 70 and first utmost point post subassembly 50 and second utmost point post subassembly 60. Alternatively, after the first pole assembly 50 and the second pole assembly 60 are molded, the insulating member 70 may be formed on one of the first pole assembly 50 and the second pole assembly 60 by injection molding, and then the other one is connected to the insulating member 70.

In one embodiment, as shown in fig. 3, the battery further includes a first insulating member 71, a second insulating member 72, and a third insulating member 73, the first insulating member 71 may be located between the first pole assembly 50 and the battery housing 10, a majority of the second insulating member 72 is sleeved on the first pole assembly 50 and partially located below the battery housing 10, and the third insulating member 73 is located between the first pole assembly 50 and the second current collecting member 40.

In one embodiment, the first pole post assembly 50 is riveted to the battery housing 10, which not only simplifies the connection method, thereby improving the assembly efficiency of the first pole post assembly 50 and the battery housing 10, but also ensures the connection stability of the first pole post assembly 50 and the battery housing 10.

It should be noted that the first pole assembly 50 and the battery case 10 may be insulated from each other, or the first pole assembly 50 and the battery case 10 may be electrically connected to each other, and in this case, the battery case 10 may be used as another electrode terminal.

In one embodiment, the distance between the first pole assembly 50 and the cell body 21 is greater than the distance between the second pole assembly 60 and the cell body 21, the first current collecting member 30 and the second current collecting member 40 form a height difference, the first current collecting member 30 is higher than the second current collecting member 40, so that the first pole assembly 50 can be conveniently connected with the first current collecting member 30, the second pole assembly 60 is connected with the second current collecting member 40, and the height of the first pole assembly 50 can be reduced, so that the space utilization rate of the battery can be improved, and the overall weight of the battery can be reduced.

In one embodiment, the height difference between the first pole assembly 50 and the second pole assembly 60 facilitates the connection between the first pole assembly 50 and the second pole assembly 60 and the first current collecting member 30 and the second current collecting member 40, respectively, and facilitates the subsequent use of the first pole assembly 50 and the second pole assembly 60 for connecting with external structures, for example, the first pole assembly 50 and the second pole assembly 60 for forming a connection with a bus bar. The height difference between the first pole assembly 50 and the second pole assembly 60 can also reduce the height of the first pole assembly 50 according to requirements.

In one embodiment, the height of the first pole assembly 50 is less than the height of the second pole assembly 60.

In one embodiment, a portion of the first pole assembly 50 is located outside of the battery housing 10 and a portion of the second pole assembly 60 is located outside of the battery housing 10; wherein, the terminal surface that second pole subassembly 60 is located the battery case 10 outside surpasss the terminal surface setting that first pole subassembly 50 is located the battery case 10 outside to can be so that the top of first pole subassembly 50 is less than the top of second pole subassembly 60, make things convenient for first pole subassembly 50 and second pole subassembly 60 to be used for forming with the busbar and be connected, avoid appearing positive and negative pole subassembly and appear the short circuit problem.

In one embodiment, as shown in fig. 3, the first current collecting member 30 is located between the first pole assembly 50 and the first tab 22, and opposite ends of the first current collecting member 30 are respectively abutted against the first pole assembly 50 and the first tab 22, so that the internal space of the battery case 10 can be fully utilized on the basis of ensuring that the first current collecting member 30 is reliably connected with the first pole assembly 50 and the first tab 22, thereby improving the space utilization rate of the battery and increasing the energy density of the battery.

In one embodiment, the second current collecting member 40 is located between the second pole assembly 60 and the second pole lug 23, and two opposite ends of the second current collecting member 40 are respectively abutted to the second pole assembly 60 and the second pole lug 23, so that on the basis of ensuring that the second current collecting member 40 is reliably connected to the second pole assembly 60 and the second pole lug 23, the internal space of the battery case 10 can be fully utilized, the space utilization rate of the battery is improved, and the energy density of the battery is improved.

It should be noted that the first current collecting member 30 may be welded to at least one of the first pole assembly 50 and the first tab 22, or the first current collecting member 30 may be in contact with only at least one of the first pole assembly 50 and the first tab 22. The second collecting member 40 may be welded with at least one of the second pole assembly 60 and the second tab 23, or the second collecting member 40 may be in contact with only at least one of the second pole assembly 60 and the second tab 23.

In one embodiment, the orthographic projection of first tab 22 toward first current collecting piece 30 is located inside first current collecting piece 30, i.e., the area of the surface of first tab 22 toward first current collecting piece 30 is smaller than the area of the surface of first current collecting piece 30 toward first tab 22, so as to ensure sufficient current carrying capacity of first current collecting piece 30.

The orthographic projection of the second tab 23 to the second collector 40 is located inside the second collector 40, that is, the area of the surface of the second tab 23 facing the second collector 40 is smaller than the area of the surface of the second collector 40 facing the second tab 23, so as to ensure that the second collector 40 has sufficient current capacity.

In one embodiment, the projection portions of the first current collecting part 30 and the second current collecting part 40 facing the same surface along the extending direction of the cell main body 21 are overlapped, that is, the first current collecting part 30 and the second current collecting part 40 are arranged at intervals, that is, electrical connection is avoided, the internal space of the battery case 10 can be fully utilized, so that the space utilization rate of the battery is improved, and the first current collecting part 30 and the second current collecting part 40 can be ensured to have sufficient overcurrent capacity.

The first current collecting member 30 may be composed of a first segment and a second segment, which are arc-connected and stacked up and down, and are connected to the first pole assembly 50 and the first tab 22, respectively, the second current collecting member 40 may be composed of a third segment and a fourth segment, which are arc-connected and stacked up and down, and are connected to the second pole assembly 60 and the second tab 23, respectively.

In one embodiment, as shown in fig. 1, the battery case 10 includes a first case member 11 and a second case member 12, and the first case member 11 and the second case member 12 are connected to seal the battery cell 20. The first housing part 11 may be a cover plate.

It is to be noted that the battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. And when the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

In one embodiment, the battery may be a prismatic battery.

The battery can be the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, the electric core is the lamination formula electric core, and the electric core has first pole piece that range upon range of each other, with first pole piece opposite second pole piece of electric property and the diaphragm piece of setting between first pole piece and second pole piece to make and pile up formation lamination formula electric core to many pairs of first pole piece and second pole piece.

Alternatively, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

An embodiment of the present invention further provides a battery, please refer to fig. 1 to 7, the battery includes: a battery case 10; the battery cell 20 is disposed in the battery case 10, and the battery cell 20 includes a cell main body 21, a first tab 22 and a second tab 23, where the first tab 22 and the second tab 23 extend from the same side of the cell main body 21; a first current collector 30, at least a portion of the first current collector 30 being disposed in the battery case 10, the first current collector 30 being connected to the first tab 22; a second current collecting member 40, at least a portion of the second current collecting member 40 being disposed in the battery case 10, the second current collecting member 40 being connected to the second tab 23; the first tab 22 and the second tab 23 extend from the cell body 21 toward the same side of the first current collecting piece 30 and the second current collecting piece 40, and a minimum distance between the first current collecting piece 30 and an end surface of the cell body 21 connected with the first tab 22 is greater than a minimum distance between the second current collecting piece 40 and an end surface of the cell body 21 connected with the second tab 23.

The battery of an embodiment of the present invention includes a battery case 10, a battery cell 20, a first current collector 30 and a second current collector 40, wherein the first tab 22 and the second tab 23 of the battery cell 20 are respectively connected to the first current collector 30 and the second current collector 40. Because the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, the first tab 22 and the second tab 23 can be prevented from occupying too much height space, so that the space utilization rate of the battery is improved, and the service performance of the battery is improved. And the minimum distance between the end surfaces of the first current collecting piece 30 and the battery cell main body 21 connected with the first tab 22 is greater than the minimum distance between the end surfaces of the second current collecting piece 40 and the battery cell main body 21 connected with the second tab 23, so that the arrangement of the first current collecting piece 30 and the second current collecting piece 40 is more reasonable, the first tab 22 and the second tab 23 are conveniently connected with the first current collecting piece 30 and the second current collecting piece 40 respectively, and the assembly difficulty of the battery is reduced.

It should be noted that, a distance between the first current collecting piece 30 and an end surface of the cell main body 21 connected to the first tab 22 is greater than a distance between the second current collecting piece 40 and an end surface of the cell main body 21 connected to the second tab 23, at this time, a distance between the first current collecting piece 30 and an end surface of the first tab 22 may be equal to a distance between the second current collecting piece 40 and an end surface of the second tab 23, and a length of the first tab 22 is greater than a length of the second tab 23. Alternatively, the distance between the first collecting member 30 and the end surface of the first tab 22 may be greater than the distance between the second collecting member 40 and the end surface of the second tab 23, and the length of the first tab 22 may be equal to the length of the second tab 23.

In one embodiment, as shown in connection with fig. 1 through 4, the thickness of the first current collector 30 may be greater than the thickness of the second current collector 40.

In one embodiment, as shown in conjunction with fig. 5 to 7, the thickness of the first current collector 30 may be less than the thickness of the second current collector 40. Reference may be made to the structures shown in figures 1 to 4 for other related structures.

It should be noted that, for other structures of the battery in this embodiment, reference may be made to the related structures of the battery, which are not described herein again.

An embodiment of the utility model also provides a battery pack, including foretell battery.

The battery pack according to an embodiment of the present invention includes a battery including a battery case 10, a battery cell 20, a first current collecting member 30 and a second current collecting member 40, wherein a first tab 22 and a second tab 23 of the battery cell 20 are respectively connected to the first current collecting member 30 and the second current collecting member 40. Because the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, the first tab 22 and the second tab 23 can be prevented from occupying too much height space, so that the space utilization rate of the battery is improved, and the service performance of the battery is improved. The distance between the first current collecting piece 30 and the battery cell main body 21 is not smaller than the distance between the second current collecting piece 40 and the battery cell main body 21, and the thickness of the first current collecting piece 30 is larger than that of the second current collecting piece 40, so that the arrangement of the first current collecting piece 30 and the second current collecting piece 40 is more reasonable, the first tab 22 and the second tab 23 are conveniently connected with the first current collecting piece 30 and the second current collecting piece 40 respectively, and the assembly difficulty of the battery is reduced.

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 can be square battery, 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. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack comprises a plurality of batteries and a box body, and the box body is used for fixing the batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

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 that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery, comprising:

a battery case (10);

the battery cell (20) is arranged in the battery shell (10), the battery cell (20) comprises a cell main body (21), a first tab (22) and a second tab (23), and the first tab (22) and the second tab (23) extend out from the same side of the cell main body (21);

a first current collector (30), at least part of the first current collector (30) being disposed within the battery housing (10), the first current collector (30) being connected to the first tab (22);

a second current collector (40), at least part of the second current collector (40) being arranged in the battery housing (10), the second current collector (40) being connected to the second pole lug (23);

the first pole lug (22) and the second pole lug (23) extend out from the cell body (21) towards the same side of the first current collecting piece (30) and the second current collecting piece (40), the minimum distance between the first current collecting piece (30) and the cell body (21) is not smaller than the minimum distance between the second current collecting piece (40) and the cell body (21), and the thickness of the first current collecting piece (30) is larger than that of the second current collecting piece (40).

2. The battery according to claim 1, wherein the first tab (22) is a positive tab and the second tab (23) is a negative tab.

3. The battery according to claim 2, wherein the first tab (22) is an aluminum tab and the second tab (23) is a copper tab.

4. The battery according to any one of claims 1 to 3, wherein an end of the first tab (22) remote from the cell body (21) is disposed beyond an end of the second tab (23) remote from the cell body (21).

5. The battery according to claim 4, wherein the first tab (22) extends from the cell body (21) a greater length than the second tab (23) extends from the cell body (21).

6. The battery according to any one of claims 1 to 3, characterized in that the battery further comprises:

a first pole assembly (50), wherein the first pole assembly (50) is arranged on the battery shell (10), and the first pole assembly (50) is connected with the first current collecting piece (30);

a second pole assembly (60), wherein the second pole assembly (60) is disposed on the battery housing (10), and the second pole assembly (60) is connected to the second current collector (40).

7. The battery of claim 6, wherein the second pole assembly (60) is disposed through the first pole assembly (50);

wherein the first pole assembly (50) and the second pole assembly (60) are arranged in an insulating manner.

8. The battery of claim 7, wherein an insulator (70) is disposed between the first pole assembly (50) and the second pole assembly (60);

wherein the first pole assembly (50) is in limit connection with at least one of the second pole assemblies (60) and the insulator (70).

9. The battery of claim 8, wherein the insulator (70) is integrally connected to at least one of the first pole assembly (50) and the second pole assembly (60).

10. The battery of claim 6, wherein a distance between the first pole assembly (50) and the cell body (21) is greater than a distance between the second pole assembly (60) and the cell body (21).

11. The battery of claim 10, wherein the first pole assembly (50) and the second pole assembly (60) have a height difference therebetween.

12. The battery of claim 11, wherein a portion of the first pole assembly (50) is located outside the battery housing (10) and a portion of the second pole assembly (60) is located outside the battery housing (10);

wherein the end surface of the second pole assembly (60) positioned on the outer side of the battery shell (10) exceeds the end surface of the first pole assembly (50) positioned on the outer side of the battery shell (10).

13. The battery according to claim 6, characterized in that the first current collector (30) is located between the first pole assembly (50) and the first tab (22), the opposite ends of the first current collector (30) abutting the first pole assembly (50) and the first tab (22), respectively;

and/or the second current collecting piece (40) is positioned between the second pole column assembly (60) and the second pole lug (23), and two opposite ends of the second current collecting piece (40) are respectively abutted with the second pole column assembly (60) and the second pole lug (23).

14. The battery according to any one of claims 1 to 3, wherein the first current collecting member (30) and the second current collecting member (40) coincide with each other along a projection portion of the cell body (21) toward the same surface in the extending direction.

15. The battery according to any one of claims 1 to 3, wherein the battery is a cylindrical battery.