CN219086210U - Cylindrical battery and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a cylindrical battery and a battery pack. The cylindrical battery comprises a first pole output end and a second pole output end, the first pole output end and the second pole output end are positioned on the same end face of the cylindrical battery, projections of the first pole output end and the second pole output end with opposite polarities on the end face are respectively a first orthographic projection and a second orthographic projection, the areas of the first orthographic projection and the second orthographic projection are respectively S1 and S2, S1/S2 is more than or equal to 5 and less than or equal to 50, so that overcurrent capacity between the first pole output end and the second pole output end is balanced, current density is uniform, current transmission rate can be guaranteed, and the problem of local overheating can be avoided, and the safety performance of the cylindrical battery is improved.

Description

Cylindrical battery and battery pack

Technical Field

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

Background

In the related art, the first pole output end and the second pole output end of the cylindrical battery are used for realizing the charge and discharge of the cylindrical battery, and due to the structural limitation of the first pole output end and the second pole output end, the overcurrent of the first pole output end and the second pole output end can be limited, so that the service performance of the battery is affected.

Disclosure of Invention

The utility model provides a cylindrical battery and a battery pack, which are used for improving the service performance of the cylindrical battery.

According to a first aspect of the present utility model, there is provided a cylindrical battery, including a first pole output end and a second pole output end, the first pole output end and the second pole output end being located on a same end face of the cylindrical battery, the first pole output end and the second pole output end being opposite in polarity, projections of the first pole output end and the second pole output end on the end face being respectively a first orthographic projection and a second orthographic projection, the second orthographic projection being at least partially disposed around the first orthographic projection, the areas of the first orthographic projection and the second orthographic projection being S1 and S2, respectively, 5.ltoreq.s1/s2.ltoreq.50.

The cylindrical battery of one embodiment of the utility model comprises the first electrode output end and the second electrode output end, and the first electrode output end and the second electrode output end are positioned on the same end face of the cylindrical battery, so that the cylindrical battery can be conveniently electrically connected when the cylindrical batteries are grouped. The projections of the first pole output end and the second pole output end on the end face are respectively a first orthographic projection and a second orthographic projection, the areas of the first orthographic projection and the second orthographic projection are respectively S1 and S2, S1/S2 is more than or equal to 5 and less than or equal to 50, so that the overcurrent capacity between the first pole output end and the second pole output end is balanced, the current density is uniform, the transmission rate of current can be ensured, the problem of local overheating can be avoided, and the safety performance of the cylindrical battery is improved.

According to a second aspect of the present utility model, there is provided a battery pack comprising the above-described cylindrical battery.

The cylindrical battery of the battery pack comprises the first electrode output end and the second electrode output end, and the first electrode output end and the second electrode output end are positioned on the same end face of the cylindrical battery, so that the cylindrical battery can be conveniently electrically connected when the cylindrical battery is grouped. The projections of the first pole output end and the second pole output end on the end face are respectively a first orthographic projection and a second orthographic projection, the areas of the first orthographic projection and the second orthographic projection are respectively S1 and S2, S1/S2 is more than or equal to 5 and less than or equal to 50, so that the overcurrent capacity between the first pole output end and the second pole output end is balanced, the current density is uniform, the transmission rate of current can be ensured, the problem of local overheating can be avoided, and the safety performance of the battery pack is improved.

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 have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.

Wherein:

fig. 1 is a schematic view showing a structure of a cylindrical battery according to an exemplary embodiment;

fig. 2 is a schematic structural view of a battery cell of a cylindrical battery according to a first exemplary embodiment;

fig. 3 is a schematic structural view of a battery cell of a cylindrical battery according to a second exemplary embodiment;

fig. 4 is a schematic structural view of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a battery case; 11. an end face; 20. a pole; 30. a battery cell; 31. a first tab; 32. a second lug; 33. a cell body; 40. a first bus bar; 50. and a second bus bar.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a cylindrical battery, where the cylindrical battery includes a first pole output end and a second pole output end, the first pole output end and the second pole output end are located on a same end face 11 of the cylindrical battery, polarities of the first pole output end and the second pole output end are opposite, projections of the first pole output end and the second pole output end on the end face 11 are respectively a first orthographic projection and a second orthographic projection, the second orthographic projection is at least partially disposed around the first orthographic projection, and areas of the first orthographic projection and the second orthographic projection are S1 and S2, respectively, and S1/S2 are 5 and less than or equal to 50.

The cylindrical battery according to one embodiment of the present utility model includes the first pole output terminal and the second pole output terminal, which are located on the same end face 11 of the cylindrical battery, so that electrical connection of the cylindrical battery can be facilitated when the cylindrical batteries are grouped. The projections of the first pole output end and the second pole output end on the end face 11 are respectively a first orthographic projection and a second orthographic projection, the areas of the first orthographic projection and the second orthographic projection are respectively S1 and S2, S1/S2 is more than or equal to 5 and less than or equal to 50, so that the overcurrent capacity between the first pole output end and the second pole output end is balanced, the current density is uniform, the transmission rate of current can be ensured, the problem of local overheating can be avoided, and the safety performance of the cylindrical battery is improved.

It should be noted that, the cylindrical battery includes a first pole output end and a second pole output end, where the first pole output end and the second pole output end are used as charging and discharging ends of the cylindrical battery, when the cylindrical batteries are grouped, for example, when two adjacent cylindrical batteries are connected in series or in parallel, two ends of the bus bar may be connected to the first pole output ends and the second pole output ends of the two cylindrical batteries respectively, or two ends of the bus bar may be connected to the first pole output ends of the two cylindrical batteries respectively, or two ends of the bus bar may be connected to the second pole output ends of the two cylindrical batteries respectively.

By enabling the projections of the first pole output end and the second pole output end on the end face 11 to be the first orthographic projection and the second orthographic projection respectively, the areas of the first orthographic projection and the second orthographic projection are S1 and S2 respectively, S1/S2 is less than or equal to 5 and less than or equal to 50, and the problems that the overcurrent capacity between the first pole output end and the second pole output end is difficult to realize balance due to the fact that the current density is uneven and the transmission rate of current is affected when the area ratio of the first orthographic projection to the second orthographic projection is too small can be avoided. When the area ratio of the first orthographic projection to the second orthographic projection is too large, namely the area of the second orthographic projection is too small, the bus connected with the output end of the second pole is caused to be locally too narrow, so that the corresponding local heat generation is serious, and the bus is fused, so that the current transmission between the cylindrical battery and the cylindrical battery is affected.

The first pole output end and the second pole output end are located on the same end face 11 of the cylindrical battery, namely, when the busbar is connected with the cylindrical battery, different busbars can be located on the same side of the cylindrical battery, so that the grouping of the cylindrical battery can be facilitated, the space utilization rate of the cylindrical battery during grouping can be improved, and the space utilization rate of the battery pack is improved.

The first electrode output and the second electrode output are located on the same end face 11 of the cylindrical battery, i.e. on the same end face 11 of the cylindrical battery, for example, when the first electrode output is connected to the first busbar 40, at this time, the first electrode output need not be all contacted with the first busbar 40, at this time, only the first electrode outputs on the same end face 11 are limited to form the electrical connection terminals, and therefore, the area of the first orthographic projection of the first electrode output on the end face 11 may be larger than the area of the first electrode output contacted with the first busbar 40.

Accordingly, when the second output terminals are connected to the second bus bar 50, not all the second output terminals need to be in contact with the second bus bar 50, and only the second output terminals on the same end face 11 are limited to form the electrical connection terminals, so the area of the second orthographic projection of the second output terminals on the end face 11 may be larger than the area of the second output terminals in contact with the second bus bar 50.

One of the first and second pole outputs is a positive pole output and the other is a negative pole output, for example, the first and second pole outputs may be positive and negative pole outputs, respectively, or the first and second pole outputs may be negative and positive pole outputs, respectively.

The second orthographic projection at least partially surrounds the first orthographic projection, so that the first electrode output end and the second electrode output end can be reasonably distributed, the space utilization rate of the cylindrical battery is improved, and the subsequent grouping of the cylindrical battery is facilitated.

A portion of the second orthographic projection may be disposed around the first orthographic projection, or all of the second orthographic projection may be disposed around the first orthographic projection, e.g., the second orthographic projection may be generally circular and the first orthographic projection may be circular.

In one embodiment, the areas of the first orthographic projection and the second orthographic projection are S1 and S2, respectively, 10.ltoreq.S1/S2.ltoreq.30.

The ratio of the areas of the first and second orthographic projections may be 5, 6, 7, 8, 9, 10, 15, 16, 18, 19, 20, 25, 28, 29, 30, 33, 35, 40, 45, 48, 49 or 50, etc.

In one embodiment, as shown in fig. 1 to 3, a cylindrical battery includes: a battery case 10, the battery case 10 including an end face 11; a pole 20, the pole 20 being disposed on the end face 11; the battery cell 30, the battery cell 30 includes first tab 31 and second tab 32 with opposite polarity, and the first tab 31 and the second tab 32 are respectively electrically connected with the battery case 10 and the pole 20, so that one of the battery case 10 and the pole 20 is a first pole output end, and the other is a second pole output end, that is, the battery case 10 and the pole 20 are used for charging or discharging of a subsequent cylindrical battery.

The projection area of the portion of the terminal post 20 located outside the terminal post 11 on the plane of the terminal post 11 is S1, the exposed area of the terminal post 11 is S2, that is, after the terminal post 20 and other non-conductive structures are excluded from the terminal post 11 of the battery case 10, the area of the terminal post 11 may be S2, and the projection area of the terminal post 20 on the plane of the terminal post 11 is S1, that is, even if a groove is provided on the terminal post 20, the projection area of the terminal post 20 on the terminal post 11 also includes the area of the groove.

For example, when a part of the pole 20 is located outside the end face 11 and another part of the pole 20 is located inside the end face 11 and the pole 20 is a cylinder, the projection of the cylinder on the end face 11 may be a circular surface, the area of the circular surface is S1, and the end face 11 is a circular surface, and one pole 20 is disposed on the circular surface, so the exposed area S2 of the end face 11 may be regarded as an area of a circular ring in practice.

In one embodiment, the battery case 10 is a steel case, the first tab 31 is electrically connected to the second output terminal, the second tab 32 is electrically connected to the first output terminal, the first output terminal and the second output terminal are respectively an anode output terminal and a cathode output terminal, the first tab 31 is a cathode tab, the second tab 32 is an anode tab, the cathode tab is electrically connected to the steel case, and the corrosion potential of the steel case is higher than the cathode potential of the cylindrical battery, so that the problem of electrochemical corrosion of the steel case can be avoided, for example, ions in the electrolyte can be prevented from being embedded into the lattice of the steel case.

In one embodiment, the battery case 10 is an aluminum case, the first tab 31 is electrically connected to the first electrode output end, the second tab 32 is electrically connected to the second electrode output end, the first electrode output end and the second electrode output end are respectively an anode output end and a cathode output end, the first tab 31 is an anode tab, the second tab 32 is a cathode tab, the anode tab is electrically connected to the aluminum case, and the corrosion potential of the aluminum case is higher than that of the anode of the cylindrical battery, so that the problem of electrochemical corrosion of the aluminum case can be avoided.

In one embodiment, the pole 20 is disposed at the central position of the battery housing 10, so that not only can the electrical connection between the pole 20 and the battery cell 30 be conveniently realized, but also the disposition position of the pole 20 can be more reasonable, structural damage to the battery housing 10 caused by the pole 20 is avoided, and the force applied by the pole 20 at the central position to each position of the battery housing 10 can be relatively uniform, thereby improving the safety performance of the battery.

In one embodiment, as shown in fig. 2, the cylindrical battery includes a battery cell 30, where the battery cell 30 includes a first tab 31 and a second tab 32 with opposite polarities, one of the first tab 31 and the second tab 32 is electrically connected to the first electrode output terminal, and the other is electrically connected to the second electrode output terminal; the battery cell 30 further includes a battery cell main body 33, and the first tab 31 and the second tab 32 are led out from the same side of the battery cell main body 33, so that the space utilization rate of the battery case 10 can be improved, and the energy density of the cylindrical battery can be improved.

In one embodiment, the first tab 31 and the second tab 32 are led out from the same side of the battery core main body 33, S1/S2 is less than or equal to 10, the first tab 31 and the second tab 32 are more flexibly arranged, and the first tab 31 and the second tab 32 are led out from the same side, so that the positions of the first tab 31 and the second tab 32 can be correspondingly exchanged, and the overcurrent areas of the first tab 31 and the second tab 32 are relatively uniform, thereby improving the safe service performance of the cylindrical battery.

In one embodiment, as shown in fig. 3, the cylindrical battery includes a battery cell 30, where the battery cell 30 includes a first tab 31 and a second tab 32 with opposite polarities, one of the first tab 31 and the second tab 32 is electrically connected to the first electrode output terminal, and the other is electrically connected to the second electrode output terminal; the battery cell 30 further includes a battery cell main body 33, and the first tab 31 and the second tab 32 are respectively led out from two opposite sides of the battery cell main body 33, so that not only can an electron transmission path be shortest, but also the transmission rate is fast, and the heat generation is low, thereby improving the safety performance of the battery.

In one embodiment, the first tab 31 and the second tab 32 are respectively led out from opposite sides of the battery core main body 33, S1/S2 is less than or equal to 30, and the first orthographic projection of the first electrode output end on the end face 11 may be relatively smaller, so that the connection strength between the electrode post 20 and the battery case 10 is increased, meanwhile, the insulation space between the first tab 31 and the second tab 32 is larger, and the insulation capability between the electrode post 20 and the battery case 10 is also larger, so that the second orthographic projection of the second electrode output end on the end face 11 is avoided from being too narrow, and therefore, the safe service performance of the cylindrical battery can be improved.

In one embodiment, at least one of the first electrode output end and the second electrode output end protrudes from the end face 11, and since the first electrode output end and the second electrode output end are located on the same end face 11 of the cylindrical battery, the risk that the bus bar causes the cylindrical battery to form a false lap joint when the cylindrical battery is grouped can be reduced, so that the safe use performance of the cylindrical battery is improved.

One of the battery case 10 and the pole 20 is a first pole output terminal, and the other is a second pole output terminal, and at this time, the pole 20 may be provided protruding from the end face 11.

Alternatively, two poles 20 may be provided on the battery case 10, the two poles 20 may be respectively provided as a first pole output end and a second pole output end, and the two poles 20 may be both provided protruding from the end face 11.

In one embodiment, the height difference between the first pole output end and the second pole output end is 1mm-5mm, so that the problem that the height difference between the first pole output end and the second pole output end is too large to occupy too much height space can be avoided on the basis of reliable insulation height between the first pole output end and the second pole output end.

The height difference between the first electrode output end and the second electrode output end is too small, so that the first electrode output end and the second electrode output end can be caused to accumulate insulation failure risks in lap joints for ensuring corresponding overcurrent surfaces, the thickness of the busbar can be correspondingly thinner for ensuring insulation between the first electrode output end and the second electrode output end, and failure risks of fusing the busbar due to higher local temperature exist.

The height difference of the first pole output and the second pole output may be 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 2.8mm, 2.9mm, 3mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 4.9mm, or 5mm, etc.

The cylindrical battery includes an electric core and an electrolyte, and is capable of performing a minimum unit of electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion comprises 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 and second pole pieces are coated with an active substance.

The cylindrical battery can be a winding type battery, namely, a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding type battery cell.

An embodiment of the present utility model also provides a battery pack including the above cylindrical battery.

The cylindrical battery of the battery pack according to one embodiment of the present utility model includes the first pole output terminal and the second pole output terminal, which are located on the same end face 11 of the cylindrical battery, so that the electrical connection of the cylindrical battery can be facilitated when the cylindrical battery is grouped. The projections of the first pole output end and the second pole output end on the end face 11 are respectively a first orthographic projection and a second orthographic projection, the areas of the first orthographic projection and the second orthographic projection are respectively S1 and S2, S1/S2 is more than or equal to 5 and less than or equal to 50, so that the overcurrent capacity between the first pole output end and the second pole output end is balanced, the current density is uniform, the transmission rate of current can be ensured, the problem of local overheating can be avoided, and the safety 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 cylindrical batteries, and the battery module can also include the bracket, and the battery can be fixed in on the bracket.

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

It should be noted that, the battery pack includes a plurality of cylindrical batteries, and the plurality of cylindrical batteries are disposed in the case. Wherein, a plurality of cylinder batteries can be installed in the box after forming the battery module. Or, a plurality of cylindrical batteries can be directly arranged in the box body, namely, the plurality of cylindrical batteries do not need to be grouped, and the plurality of cylindrical batteries are fixed by the box body.

In one embodiment, the battery pack further includes first and second bus bars 40 and 50, the first and second bus bars 40 and 50 being connected to the first and second pole outputs of the cylindrical batteries, respectively, such that series or parallel connection between the cylindrical batteries can be achieved through the first and second bus bars 40 and 50.

The first bus bar 40 and the second bus bar 50 are located at the same end face of the cylindrical battery, so that the space utilization of the battery pack can be improved. The first bus bar 40 and the second bus bar 50 are described herein as being located on the same side of the cylindrical battery, and it is not specifically intended that the first bus bar 40 and the second bus bar 50 must be in contact connection with the same end face.

As shown in fig. 4, the battery pack further includes first and second bus bars 40 and 50, and the first and second bus bars 40 and 50 connect the battery case 10 and the post 20 of the cylindrical battery, respectively, so that the cylindrical battery can be made to be electrically connected with other cylindrical batteries through the first and second bus bars 40 and 50, thereby grouping the cylindrical batteries.

In one embodiment, as shown in fig. 4, the first bus bar 40 and the second bus bar 50 are located at the same side of the battery case 10, and further, the first bus bar 40 is connected to the end surface of the battery case 10 where the poles 20 are provided, so that the space utilization of the cylindrical batteries can be improved and the grouping of the cylindrical batteries can also be facilitated.

In one embodiment, the first and second buss bars 40 and 50 may be located on opposite sides of the battery housing 10 to accommodate the mounting and spatial arrangement of the cylindrical batteries.

In one embodiment, the cylindrical batteries may be plural, and the plural cylindrical batteries may be electrically connected through the first bus bar 40 and the second bus bar 50, for example, when the plural cylindrical batteries may be connected in series, the first bus bar 40 may be connected with the post 20 of the first cylindrical battery and with the battery case 10 of the second cylindrical battery, while the second bus bar 50 may be connected with the battery case of the first cylindrical battery and the second bus bar 50 may be connected with the post 20 of the third cylindrical battery.

The first bus bar 40 may be welded to the battery case 10 of the cylindrical battery, and the second bus bar 50 may be welded to the post 20 of the cylindrical battery.

It should be noted that, as shown in fig. 4, a first bus bar 40 and a second bus bar 50 may be connected to one cylindrical battery, where the first bus bar 40 may be connected to the battery case 10 of the cylindrical battery, and the second bus bar 50 may be connected to the post 20 of the cylindrical battery.

The first bus bar 40 and the second bus bar 50 may each include a post connection portion for connecting the posts 20 of one cylindrical battery and a cylindrical battery case connection portion for connecting the battery case 10 of the other cylindrical battery. The first bus bar 40 or the second bus bar 50 may be used for only two cylindrical batteries, or the first bus bar 40 and the second bus bar 50 may be used for connecting more than two cylindrical batteries, which is not limited herein and may be selected according to actual requirements.

The number of the bus bars and the specific structure are not limited, and may be selected according to actual requirements, and accordingly, the number of the cylindrical batteries is not limited, and the plurality of cylindrical batteries may be connected in parallel, or the plurality of cylindrical batteries may be connected in series.

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

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

Claims (14)

1. The utility model provides a cylinder battery, its characterized in that includes first pole output and second pole output, first pole output with the second pole output is located on the same terminal surface (11) of cylinder battery, first pole output with the second pole output polarity is opposite, first pole output with the projection of second pole output on terminal surface (11) is first orthographic projection and second orthographic projection respectively, the second orthographic projection at least part encircles first orthographic projection sets up, first orthographic projection with the area of second orthographic projection is S1 and S2 respectively, 5 is less than or equal to S1/S2 is less than or equal to 50.

2. The cylindrical battery of claim 1, wherein the second orthographic projection is disposed around the first orthographic projection.

3. The cylindrical battery of claim 1, wherein 10.ltoreq.s1/s2.ltoreq.30.

4. The cylindrical battery of claim 1, wherein the cylindrical battery comprises:

-a battery housing (10), said battery housing (10) comprising said end face (11);

-a pole (20), said pole (20) being arranged on said end face (11);

the battery cell (30), the battery cell (30) comprises a first tab (31) and a second tab (32) with opposite polarities, the first tab (31) and the second tab (32) are respectively electrically connected with the battery shell (10) and the pole (20), so that one of the battery shell (10) and the pole (20) is the first pole output end, and the other is the second pole output end;

the projection area of the part of the pole (20) located outside the end face (11) towards the plane of the end face (11) is S1, and the exposed area of the end face (11) is S2.

5. The cylindrical battery according to claim 4, wherein the battery case (10) is a steel case, the first tab (31) is electrically connected to the second electrode output terminal, the second tab (32) is electrically connected to the first electrode output terminal, and the first electrode output terminal is a positive electrode output terminal.

6. The cylindrical battery according to claim 4, wherein the battery case (10) is an aluminum case, the first tab (31) is electrically connected to the first electrode output terminal, the second tab (32) is electrically connected to the second electrode output terminal, and the first electrode output terminal is a positive electrode output terminal.

7. The cylindrical battery according to claim 1, characterized in that the cylindrical battery comprises an electric core (30), the electric core (30) comprises a first tab (31) and a second tab (32) with opposite polarities, one of the first tab (31) and the second tab (32) is electrically connected with the first electrode output terminal, and the other is electrically connected with the second electrode output terminal;

the battery cell (30) further comprises a battery cell main body (33), and the first tab (31) and the second tab (32) are led out from the same side of the battery cell main body (33).

8. The cylindrical battery of claim 7, wherein 10.ltoreq.s1/S2.

9. The cylindrical battery according to claim 1, characterized in that the cylindrical battery comprises an electric core (30), the electric core (30) comprises a first tab (31) and a second tab (32) with opposite polarities, one of the first tab (31) and the second tab (32) is electrically connected with the first electrode output terminal, and the other is electrically connected with the second electrode output terminal;

the battery cell (30) further comprises a battery cell main body (33), and the first tab (31) and the second tab (32) are respectively led out from two opposite sides of the battery cell main body (33).

10. The cylindrical battery of claim 9, wherein S1/S2 is less than or equal to 30.

11. Cylindrical battery according to claim 1, characterized in that the first pole output is arranged protruding from the end face (11).

12. The cylindrical battery of claim 11, wherein the difference in height between the first pole output and the second pole output is 1mm-5mm.

13. A battery comprising the cylindrical battery of any one of claims 1 to 12.

14. The battery of claim 13, further comprising a first bus bar (40) and a second bus bar (50), the first bus bar (40) and the second bus bar (50) respectively connecting a first pole output and a second pole output of the cylindrical battery, the first bus bar (40) and the second bus bar (50) being located at a same end face of the cylindrical battery.

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