CN218039722U - Battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery, comprising: a battery case; an electric cell, the electric cell is arranged in the battery case, and the first tab and the second tab extend from the same side of the main body of the battery cell ; the first current collector, at least part of the first current collector is arranged in the battery case, and the first current collector is connected to the first tab; the second current collector, at least part of the second current collector is arranged on In the battery case, the second current collector is connected to the second tab; the first tab and the second tab extend from the main body of the cell towards the same side of the first current collector and the second current collector, and the second current collector The minimum distance between a current collector and the battery core body is not less than the minimum distance between the second current collector and the battery core body, and the thickness of the first current collector is greater than the thickness of the second current collector, so that the first current collector The arrangement of the current collector and the second current collector is more reasonable, which facilitates the connection of the first tab and the second tab to the first current collector and the second current collector respectively, thereby reducing the difficulty of assembling the battery.

Description

Battery

technical field

The utility model relates to the technical field of batteries, in particular to a battery.

Background technique

In the related art, the battery cell has tabs on both sides, that is, the positive tab and the negative tab are respectively located at the two ends of the cell. However, tabs on both sides occupy a large space inside the battery, which reduces the overall space utilization rate inside the battery.

Utility model content

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

The utility model provides a battery, comprising:

battery case;

A battery cell, the battery cell is arranged in the battery case, the battery cell includes a battery cell body, a first tab and a second tab, and the first tab and the second tab extend from the same side of the cell body;

a first current collector, at least part of the first current collector is disposed in the battery case, and the first current collector is connected to the first tab;

a second current collector, at least part of the second current collector is disposed in the battery case, and the second current collector is connected to the second tab;

Wherein, the first tab and the second tab extend from the cell body toward the same side of the first current collector and the second current collector, and the minimum distance between the first current collector and the cell body is not less than The minimum distance between the second current collecting piece and the main body of the electric core, the thickness of the first current collecting piece is greater than the thickness of the second current collecting piece.

The battery of the embodiment of the utility model includes a battery case, a battery cell, a first current collector and a second current collector, and the first tab and the second tab of the battery core are connected with the first current collector and the second collector respectively. Streaming connection. Since the first tab and the second tab extend from the same side of the cell body, it is possible to avoid the first tab and the second tab from occupying too much height space, thereby improving the space utilization of the battery, thereby Improve battery performance. The minimum distance between the first current collector and the main body of the battery cell is not less than the minimum distance between the second current collector and the main body of the battery cell, and the thickness of the first current collector is greater than the thickness of the second current collector, so that it can be Make the arrangement of the first current collector and the second current collector more reasonable, so as to facilitate the connection of the first tab and the second tab to the first current collector and the second current collector respectively, thereby reducing the battery assembly difficulty.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following figures. 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, related elements or components may be arranged differently as known in the art. In addition, in the drawings, the same reference numerals denote the same or similar components in the respective drawings. in:

Fig. 1 is a schematic structural view of a battery according to an exemplary embodiment;

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

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

Fig. 4 is a partial structural schematic diagram of a battery according to an exemplary embodiment;

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

Fig. 6 is a partial cross-sectional structural schematic view of a battery according to another exemplary embodiment;

Fig. 7 is a partial structural schematic diagram of a battery according to another exemplary embodiment.

The reference signs are explained as follows:

10. Battery casing; 11. First casing part; 12. Second casing part; 20. Battery cell; 21. Battery cell main body; 22. First tab; 23. Second tab; 30. Second tab A current collector; 40, a second current collector; 50, a first pole assembly; 60, a second pole assembly; 70, an insulating element; 71, a first insulating element; 72, a second insulating element; 73, third insulator.

detailed description

The following will clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only, and are not intended to limit the protection scope of the present disclosure, so it should be understood that various modifications can be made to the exemplary embodiments without departing from the protection scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" is means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" or "an" are likewise intended to mean one of a possible plurality of such objects.

Unless otherwise specified or explained, the terms "connected" and "fixed" should be interpreted in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integral connection, or electrical connection, or Connection; "connection" can be a direct connection or an indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

Furthermore, in the description of the present disclosure, it should be understood that the orientation words such as "upper", "lower", "inner" and "outer" described in the exemplary embodiments of the present disclosure are based on the angles shown in the drawings It should not be construed as limiting the example embodiments of the present disclosure. It also needs to be understood that in this context, when an element or feature is referred to as being "on," "under," or "inside" or "outside" another element(s), it is not only a direct connection In other (one or more) elements "on", "under" or "inside", "outside", it can also be indirectly connected to another (one or more) elements "on", "under" or "outside" through intermediate elements inside and outside".

An embodiment of the present utility model provides a battery, please refer to Fig. 1 to Fig. 4, the battery includes: a battery case 10; The main body 21, the first tab 22 and the second tab 23, the first tab 22 and the second tab 23 extend from the same side of the cell main body 21; the first current collector 30, the first current collector At least part of the current collector 30 is arranged in the battery case 10, and the first current collector 30 is connected to the first tab 22; the second current collector 40, at least part of the second current collector 40 is arranged in the battery case 10 , the second current collecting piece 40 is connected to the second tab 23; wherein, the first tab 22 and the second tab 23 are directed from the main body 21 of the battery cell toward the same point 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 battery core body 21 is not less than the minimum distance between the second current collecting piece 40 and the battery core main body 21, and the thickness of the first current collecting piece 30 is greater than that of the first current collecting piece 30. The thickness of the two current collectors 40 .

The battery in one 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, and the first tab 22 and the second tab 23 of the battery cell 20 are connected to the first tab 23 respectively. A current collector 30 is connected to a second current collector 40 . Since the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, it is possible to avoid the first tab 22 and the second tab 23 from occupying too much height space, thereby improving the battery capacity. Space utilization, thereby improving battery performance. The minimum distance between the first current collecting piece 30 and the battery core body 21 is not less than the minimum distance between the second current collecting piece 40 and the battery core main body 21, and the thickness of the first current collecting piece 30 is greater 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 can be more reasonable, so that the first tab 22 and the second tab 23 can be connected with the first current collecting piece 30 and the second tab 23 respectively. The two current collectors 40 are connected, thereby reducing the difficulty of assembling the battery.

It should be noted that the first tab 22 and the second tab 23 extend from the cell main body 21 toward the same side of the first current collector 30 and the second current collector 40 , so that the first tab 22 can be realized Compared with the lead-out on the same side as the second lug 23 in the related art, the lugs are led out on both sides, the lead-out of the first lug 22 and the second lug 23 in this embodiment can reduce the height space of the lugs Occupancy rate, so as to improve the space utilization rate of the battery, and then the energy density of the battery can be improved.

The minimum distance between the first current collector 30 and the cell body 21 is not less than the minimum distance between the second current collector 40 and the cell body 21, that is, the side of the first current collector 30 facing the cell body 21 The distance between the side of the cell body 21 facing the first current collector 30 may be equal to 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 main body 21 and the side of the cell main body 21 facing the first current collector 30 may be greater than that of the second current collector 40 facing the electric cell. The distance between one side of the core 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 can form a structure arranged up and down, while The thickness of the first current collecting piece 30 is greater than the thickness of the second current collecting piece 40, that is, the thickness of the second current collecting piece 40 can be relatively small, so that the subsequent connection of the second current collecting piece 40 and the second tab 23 can be facilitated , for example, the welding of the second current collector 40 and the second tab 23 .

In one embodiment, the first tab 22 is a positive tab, the second tab 23 is a negative tab, the first current collector 30 is a positive current collector, and the second current collector 40 is a negative current collector. The positive current collector can be made of aluminum, while the negative current collector can be made of copper. Compared with aluminum, copper is more difficult to bend and weld, and the thickness of the negative current collector is smaller than that of the positive current collector to avoid the negative current collector. Solve the problem that parts are difficult to weld, so as to improve the efficiency of battery assembly.

In one embodiment, the first tab 22 is a positive tab, the first tab 22 is an aluminum tab, the second tab 23 is a negative tab, and the second tab 23 is a copper tab, so as to meet the requirements of the battery. The material requirements of the positive electrode current collector can be aluminum, and the negative electrode current collector can be copper, which can facilitate the welding of the positive electrode tab and the negative electrode tab to the positive electrode current collector and the negative electrode current collector respectively, and can ensure the positive electrode tab and the negative electrode current collector. The welding stability of the negative electrode lug and the positive electrode current collector and the negative electrode current collector respectively avoids the problem of connection failure.

In one embodiment, the first current collecting piece 30 and the second current collecting piece 40 form a height difference, the first current collecting piece 30 is higher than the second current collecting piece 40, and the first tab 22 is away from the center of the main body 21 of the electric core. One end is set beyond the end of the second tab 23 away from the cell main body 21 , so that the first tab 22 and the second tab 23 can be electrically connected to the first current collector 30 and the second current collector 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 first tab 22 can be kept away from the cell body 21 is set beyond the end of the second tab 23 away from the main body 21 of the battery core, and can further match the first current collecting piece 30 and the second current collecting piece 40 forming a height difference, so as to realize the first current collecting piece 30 and the second current collecting piece. The connections between the two current collectors 40 and the first tab 22 and the second tab 23 .

The first tab 22 is a positive tab, and the second tab 23 is a negative tab. The length of the negative tab is relatively small, and the thickness of the negative current collector is relatively small, so that the negative tab and the negative current collector can be reduced. The assembly difficulty of parts is convenient, and the electrical connection between the negative electrode tab and the negative electrode current collector is convenient.

In one embodiment, as shown in FIG. 2 and FIG. 3 , the battery further includes: a first pole assembly 50, the first pole assembly 50 is disposed on the battery case 10, the first pole assembly 50 is connected to the first current collector The second pole assembly 60, the second pole assembly 60 is arranged on the battery case 10, the second pole assembly 60 is connected with the second current collector 40, so that the first pole assembly 50 and the second pole assembly 60 are respectively used as two electrode lead-out ends of the battery, so as to facilitate the grouping of subsequent batteries, thereby improving the assembly efficiency of the battery pack.

When a plurality of batteries are grouped, two adjacent batteries can be connected in series or in parallel through the bus bar, and by providing the first pole assembly 50 and the second pole assembly 60 on the battery, it can be conveniently formed with the bus bar. connect.

In one embodiment, the first pole assembly 50 and the second pole assembly 60 may be disposed on the battery case 10 at intervals, so as to form connections 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 can be located on opposite sides of the central area of the battery case 10, so as to facilitate the setting of the first pole assembly 50 and the second pole assembly 60, and can Make full use of the external space of the battery case 10 .

In one embodiment, as shown in FIG. 1 and FIG. 3 , the second pole component 60 is penetrated in the first pole component 50; wherein, the first pole component 50 and the second pole component 60 are insulated Setting, on the basis of ensuring reliable insulation between the first pole assembly 50 and the second pole assembly 60, the integration of the first pole assembly 50 and the second pole assembly 60 can also be improved, thereby maximizing the battery The degree of density, in order to improve the energy density of the battery.

The second pole component 60 is penetrated in the first pole component 50, that is, a through hole is provided inside the first pole component 50, and the second pole component 60 is penetrated in the through hole, so that the first pole The column assembly 50 and the second pole assembly 60 are integrated together, and the insulation treatment is carried out between the first pole assembly 50 and the second pole assembly 60, which can ensure that the first pole assembly 50 and the second pole assembly 60 It can be used as positive and negative electrode leads to realize charging and discharging of the battery.

In one embodiment, at least one of the first pole assembly 50 and the second pole assembly 60 may be provided with a coating, and the coating may be aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) Ceramic materials such as ceramic materials are used to realize the 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 first pole assembly 50 and the second pole assembly 60 At least one of them is limitedly connected with the insulator 70. On the basis that the insulator 70 realizes reliable insulation of the first pole assembly 50 and the second pole assembly 60, the insulator 70 can also be connected with the first pole assembly 50 and the second pole assembly 60. The second pole assembly 60 forms a reliable fixed connection, so as to ensure the insulation performance of the insulating member 70 .

The insulator 70 can be plastic, for example, the insulator 70 can be an injection molded part, and after the first pole assembly 50 and the second pole assembly 60 are formed, the insulator 70 can be directly injection-molded on the first pole assembly 50 and the second pole assembly. Between the two-pole assembly 60 . Alternatively, the insulator 70 may be a rubber structure, and an insulating seal is formed by clamping the rubber structure between the first pole assembly 50 and the second pole assembly 60 . Alternatively, the insulating member 70 may be a glass-related material, so as to achieve a glass insulating seal between the first pole assembly 50 and the second pole assembly 60 .

In one embodiment, the insulator 70 is integrally connected with at least one of the first pole assembly 50 and the second pole assembly 60, so as to ensure that the insulator 70 is connected with the first pole assembly 50 and the second pole assembly. The connection stability of at least one of the column assemblies 60 can be improved, and the assembly efficiency of the battery can be improved.

After the molding of the first pole assembly 50 and the second pole assembly 60 is completed, an insulator 70 can be formed by injection molding between the first pole assembly 50 and the second pole assembly 60, so as to realize the insulator 70 and the first pole assembly. The integrated connection of the pole assembly 50 and the second pole assembly 60 ensures that the insulator 70 is closely attached to the first pole assembly 50 and the second pole assembly 60 . Alternatively, after the molding of the first pole assembly 50 and the second pole assembly 60 is completed, an insulating member 70 may be formed by injection molding on one of the first pole assembly 50 and the second pole assembly 60, and the other is subsequently insulated from the other. 70 is connected.

In one embodiment, as shown in FIG. 3 , the battery further includes a first insulator 71 , a second insulator 72 and a third insulator 73 , and the first insulator 71 can be located between the first pole assembly 50 and the battery case. 10, a large part of the second insulating member 72 is sleeved on the first pole assembly 50, and partly located under the battery case 10, and the third insulating member 73 is located between the first pole assembly 50 and the second current collector. Between 40 pieces.

In one embodiment, the first pole assembly 50 is riveted with the battery case 10, which not only has a simple connection method, thereby improving the assembly efficiency of the first pole assembly 50 and the battery case 10, but also ensures that the first pole assembly 50 and the connection stability of the battery case 10.

It should be noted that the first pole assembly 50 and the battery case 10 may be insulated, or the first pole assembly 50 and the battery case 10 may be electrically connected. At this time, the battery case 10 can be used as another electrode lead-out end.

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, and the first current collector 30 and the second current collector Part 40 forms a height difference, and the first current collecting part 30 is higher than the second current collecting part 40, so that the connection between the first pole assembly 50 and the first current collecting part 30 can be facilitated, and the second pole assembly 60 can be connected with the second current collecting part. The member 40 is connected, and the height of the first pole assembly 50 can be reduced, thereby improving the space utilization rate of the battery and reducing the overall weight of the battery.

In one embodiment, there is a height difference between the first pole assembly 50 and the second pole assembly 60, that is, when the first pole assembly 50 and the second pole assembly 60 are respectively connected to the first current collector 30 and On the basis of the connection of the second current collector 40, the first pole assembly 50 and the second pole assembly 60 can also be used to connect the external structure, for example, to facilitate the first pole assembly 50 and the second pole assembly 60 is used to form a connection with the busbar. 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 smaller than the height of the second pole assembly 60 .

In one embodiment, part of the first pole assembly 50 is located outside the battery case 10, and part of the second pole assembly 60 is located outside the battery case 10; wherein, the second pole assembly 60 is located outside the battery case 10 is set beyond the end surface of the first pole assembly 50 outside the battery case 10, so that the top of the first pole assembly 50 is lower than the top of the second pole assembly 60, so that the first pole assembly 60 can be easily The component 50 and the second pole component 60 are used to form a connection with the bus bar, so as to avoid the short circuit problem of the positive and negative pole components.

In one embodiment, as shown in FIG. 3 , the first current collector 30 is located between the first pole assembly 50 and the first tab 22 , and the opposite ends of the first current collector 30 are connected to the first pole respectively. The assembly 50 and the first tab 22 abut, on the basis of ensuring that the first current collector 30 is reliably connected to the first pole assembly 50 and the first tab 22, the internal space of the battery case 10 can also be fully utilized, thereby Improve the space utilization of the battery, thereby increasing the energy density of the battery.

In one embodiment, the second current collector 40 is located between the second pole assembly 60 and the second tab 23, and the opposite ends of the second current collector 40 are connected to the second pole assembly 60 and the second pole respectively. On the basis of ensuring that the second current collector 40 is reliably connected to the second pole assembly 60 and the second tab 23, the inner space of the battery case 10 can also be fully utilized, thereby improving the space utilization rate of the battery. , so as to increase the energy density of the battery.

It should be noted that the first current collector 30 can be welded to at least one of the first pole assembly 50 and the first tab 22 , or the first current collector 30 can be welded to the first pole assembly 50 and the first pole assembly 50 and At least one of the first tabs 22 only makes contact. The second current collector 40 may be welded to at least one of the second pole assembly 60 and the second tab 23 , or the second current collector 40 may be welded to the second pole assembly 60 and the second tab 23 At least one of them makes contact only.

In one embodiment, the orthographic projections of the first tab 22 toward the first current collector 30 are located inside the first current collector 30 , that is, the area of the surface of the first tab 22 facing the first current collector 30 is smaller than The area of the surface of the first current collector 30 facing the first tab 22 ensures that the first current collector 30 has sufficient flow capacity.

The orthographic projections of the second tab 23 towards the second current collecting piece 40 are located inside the second current collecting piece 40 , that is, the area of the surface of the second tab 23 facing the second current collecting piece 40 is smaller than that of the second current collecting piece 40 The area of the surface facing the second tab 23 ensures that the second current collector 40 has sufficient flow capacity.

In one embodiment, the projected parts of the first current collector 30 and the second current collector 40 toward the same surface along the extension direction of the cell main body 21 coincide, that is, the first current collector 30 and the second current collector 40 On the basis of ensuring interval setting, that is, to avoid electrical connection, the internal space of the battery case 10 can be fully utilized, thereby improving the space utilization rate of the battery, and ensuring that the first current collector 30 and the second current collector 40 Have sufficient flow capacity.

The first current collector 30 can be composed of a first section and a second section, the first section and the second section have a circular arc transition, the first section and the second section are stacked up and down, and the first section and the second section can be respectively Connecting the first pole assembly 50 and the first lug 22, the second current collector 40 may be composed of a third section and a fourth section, the third section and the fourth section have a circular arc transition, and the third section and the fourth section The segments are stacked up and down, and the third segment and the fourth segment can be respectively connected to the second pole assembly 60 and the second tab 23 .

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

It should be understood that a battery includes a battery cell and an electrolyte, the smallest unit capable of electrochemical reactions such as charging/discharging. The battery core refers to a unit formed by winding or laminating a stacked part, and the stacked part includes a first pole piece, a separator, and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein, 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 material.

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

The battery can be a stacked battery, which is not only convenient for grouping, but also can be processed to obtain a battery with a long length. Specifically, the electric core is a laminated electric core, and the electric core has a first pole piece stacked on each other, a second pole piece electrically opposite to the first pole piece, and a pole piece arranged between the first pole piece and the second pole piece. The separator sheet, so that multiple pairs of the first pole piece and the second pole piece are stacked to form a laminated battery cell.

Alternatively, the battery can be a wound battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the diaphragm sheet arranged between the first pole piece and the second pole piece are wound, Obtain a coiled battery.

In one embodiment, the battery may be a cylindrical battery. The battery can be a winding battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a rolled battery. Winding core.

An embodiment of the present invention also provides a battery, please refer to Figure 1 to Figure 7, the battery includes: a battery case 10; The core body 21, the first tab 22 and the second tab 23, the first tab 22 and the second tab 23 extend from the same side of the cell main body 21; the first current collector 30, the first current collector At least part of the current collector 30 is arranged in the battery case 10, the first current collector 30 is connected to the first tab 22; the second current collector 40, at least part of the second current collector 40 is arranged in the battery case 10 Inside, the second current collecting piece 40 is connected with the second pole lug 23; wherein, the first pole lug 22 and the second pole lug 23 are directed from the cell main body 21 toward the first current collecting piece 30 and the second current collecting piece 40 Extending from the same side, the minimum distance between the first current collector 30 and the end face of the cell body 21 connected to the first tab 22 is greater than the second current collector 40 and the end face of the cell body 21 connected to the second tab 23 the minimum distance between.

The battery in one 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, and the first tab 22 and the second tab 23 of the battery cell 20 are connected to the first tab 23 respectively. A current collector 30 is connected to a second current collector 40 . Since the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, it is possible to avoid the first tab 22 and the second tab 23 from occupying too much height space, thereby improving the battery capacity. Space utilization, thereby improving battery performance. However, the minimum distance between the first current collector 30 and the end face of the cell main body 21 connected to the first tab 22 is greater than the minimum distance between the second current collector 40 and the end face of the cell main body 21 connected to the second tab 23 , so that the arrangement of the first current collecting piece 30 and the second current collecting piece 40 can be more reasonable, so as to facilitate the connection between the first tab 22 and the second tab 23 and the first current collecting piece 30 and the second current collecting piece, respectively. Component 40 is connected, thereby reducing the difficulty of battery assembly.

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

In one embodiment, as shown in FIG. 1 to FIG. 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 FIG. 5 to FIG. 7 , the thickness of the first current collector 30 may be smaller than the thickness of the second current collector 40 . For other relevant structures, reference may be made to the structures shown in FIGS. 1 to 4 .

It should be noted that, for other structures of the battery in this embodiment, reference may be made to the related structures of the above-mentioned battery, which will not be repeated here.

An embodiment of the present invention also provides a battery pack, including the above-mentioned battery.

The battery pack of one embodiment of the present invention includes a battery, and the battery includes a battery case 10, a battery cell 20, a first current collector 30 and a second current collector 40, and the first tab 22 and the second pole of the battery cell 20 The ears 23 are respectively connected with the first current collecting piece 30 and the second current collecting piece 40 . Since the first tab 22 and the second tab 23 extend from the same side of the cell main body 21, it is possible to avoid the first tab 22 and the second tab 23 from occupying too much height space, thereby improving the battery capacity. Space utilization, thereby improving battery performance. The distance between the first current collecting piece 30 and the battery core body 21 is not less than the distance between the second current collecting piece 40 and the battery core main body 21, and the thickness of the first current collecting piece 30 is greater than that of the second current collecting piece 40. Thickness, so that the arrangement of the first current collector 30 and the second current collector 40 can be more reasonable, so that the first tab 22 and the second tab 23 can be connected with the first current collector 30 and the second current collector respectively. The flow member 40 is connected, thereby reducing the difficulty of battery assembly.

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

The battery module includes a plurality of batteries, which may be square batteries, and the battery module may also include end plates and side plates, which are used to fix the plurality of batteries. The battery can be a cylindrical battery, and the battery module can also include a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case body, and the case body is used to fix the plurality of batteries.

It should be noted that the battery pack includes batteries, and there may be multiple batteries, and the multiple batteries are arranged in the case. Wherein, a plurality of batteries can be installed in the casing after forming a battery module. Alternatively, a plurality of batteries can be directly arranged in the case, that is, it is not necessary to group the plurality of batteries, and the case is used to fix the plurality of batteries.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the utility model innovation disclosed herein. This disclosure is intended to cover any modification, use or adaptation of the present utility model, and these modifications, uses or adaptations follow the general principles of this disclosure and include common knowledge or conventional techniques in the technical field not disclosed in this disclosure means. The specification and example embodiments are to be considered as exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (15)

1. A battery, characterized in that, comprising: battery case (10); A battery cell (20), the battery cell (20) is arranged in the battery casing (10), and the battery cell (20) includes a battery cell main body (21), a first tab (22) and a second a tab (23), the first tab (22) and the second tab (23) extend from the same side of the cell main body (21); The first current collecting piece (30), at least part of the first current collecting piece (30) is arranged in the battery casing (10), the first current collecting piece (30) and the first pole Ears (22) are connected; The second current collecting piece (40), at least part of the second current collecting piece (40) is arranged in the battery casing (10), the second current collecting piece (40) is connected with the second pole Ears (23) are connected; Wherein, the first tab (22) and the second tab (23) are directed from the cell main body (21) toward the first current collector (30) and the second current collector ( 40), the minimum distance between the first current collecting piece (30) and the battery core body (21) is not less than the second current collecting piece (40) and the battery core The minimum distance between the main bodies (21), the thickness of the first current collecting piece (30) is greater than the thickness of the second current collecting piece (40). 2. The battery according to claim 1, characterized in that, the first tab (22) is a positive tab, and the second tab (23) is a negative tab. 3. The battery according to claim 2, characterized in that, 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, characterized in that, the end of the first tab (22) away from the cell main body (21) exceeds the second tab (23) ) is set away from one end of the battery core body (21). 5. The battery according to claim 4, characterized in that, the length of the first tab (22) extending from the cell body (21) is longer than the length of the second tab (23) extending from the cell body (21). The extended length of the cell main body (21). 6. The battery according to any one of claims 1 to 3, wherein the battery further comprises: The first pole assembly (50), the first pole assembly (50) is arranged in the battery case (10), the first pole assembly (50) and the first current collector (30) ) are connected; The second pole assembly (60), the second pole assembly (60) is arranged in the battery case (10), the second pole assembly (60) and the second current collector (40) ) are connected. 7. The battery according to claim 6, characterized in that, the second pole assembly (60) is passed through the first pole assembly (50); Wherein, the first pole assembly (50) and the second pole assembly (60) are insulated. 8. The battery according to claim 7, characterized in that an insulating member (70) is arranged between the first pole assembly (50) and the second pole assembly (60); Wherein, the first pole component (50) is limitedly connected with at least one of the second pole components (60) and the insulating member (70). 9. The battery according to claim 8, characterized in that, the insulator (70) is compatible with at least one of the first pole assembly (50) and the second pole assembly (60) Body molding connection. 10. The battery according to claim 6, characterized in that, 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 distance between the battery core bodies (21). 11. The battery according to claim 10, characterized in that there is a height difference between the first pole assembly (50) and the second pole assembly (60). 12. The battery according to claim 11, characterized in that, the part of the first pole assembly (50) is located outside the battery casing (10), and the part of the second pole assembly (60) partly located on the outside of the battery case (10); Wherein, the end surface of the second pole assembly (60) outside the battery casing (10) is set beyond the end surface of the first pole assembly (50) outside the battery casing (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), so The opposite ends of the first current collector (30) abut against the first pole assembly (50) and the first tab (22) respectively; And/or, the second current collecting piece (40) is located between the second pole assembly (60) and the second tab (23), and the opposite of the second current collecting piece (40) The two ends abut against the second pole component (60) and the second pole lug (23) respectively. 14. The battery according to any one of claims 1 to 3, characterized in that, the first current collector (30) and the second current collector (40) are along the battery core body (21 ) to coincide with the projected part of the extension direction towards the same surface. 15. The battery according to any one of claims 1 to 3, wherein the battery is a cylindrical battery.

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