CN217848107U

CN217848107U - Cylindrical battery

Info

Publication number: CN217848107U
Application number: CN202222051986.8U
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: 2022-11-18
Anticipated expiration: 2032-08-04

Abstract

The utility model relates to a battery technology field provides a cylinder battery, include: a battery case; the battery comprises a battery cell, a battery shell and a battery cover, wherein the battery cell is arranged in the battery shell and comprises a 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 cell main body; the first pole post assembly is arranged on the battery shell and is connected with the first pole lug; the second pole column assembly is arranged on the battery shell and is connected with the second pole ear; the explosion-proof valve is arranged in the battery shell and is positioned on the same surface of the battery shell together with the first pole post assembly and the second pole post assembly, the explosion-proof valve is positioned in an isolation area of the first pole post assembly and the second pole post assembly, and on the basis of reasonably utilizing the space of the battery shell, a gas storage space can be formed by a gap formed by a first pole lug and a second pole lug which are led out from the same side of the battery core main body, so that the explosion-proof valve is convenient to explode in time, and the safety and the service performance of the battery are improved.

Description

Cylindrical battery

Technical Field

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

Background

In the related art, an explosion-proof valve of a battery is used to protect the battery so as to be exploded in time when the internal pressure of the battery reaches a certain level. However, due to the restriction of the internal space of the battery, the problem that the explosion-proof valve cannot be opened in time is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cylindrical battery to improve cylindrical battery's performance.

The utility model provides a cylindrical battery, include:

a battery case;

the battery comprises a battery cell, a battery shell and a battery cover, wherein the battery cell is arranged in the battery shell and comprises a 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 cell main body;

the first pole post assembly is arranged on the battery shell and is connected with the first pole lug;

the second pole column assembly is arranged in the battery shell and is connected with the second pole ear;

the explosion-proof valve is arranged in the battery shell and is positioned on the same surface of the battery shell as the first pole post assembly and the second pole post assembly;

wherein, first utmost point post subassembly and second utmost point post subassembly interval set up to make first utmost point post subassembly and second utmost point post subassembly set up with first utmost point ear and second utmost point ear respectively relatively, the at least part of explosion-proof valve is located the isolation zone between first utmost point post subassembly and the second utmost point post subassembly, and the relative both ends of isolation zone all intersect with battery housing's outward flange.

The utility model discloses the cylinder battery includes battery housing, electric core, first utmost point post subassembly, second utmost point post subassembly and explosion-proof valve, first utmost point post subassembly and second utmost point post subassembly are connected with first utmost point ear and second utmost point ear in the electric core main part respectively to this makes first utmost point post subassembly and second utmost point post subassembly conduct two electrodes of battery respectively and draws forth the end, and explosion-proof valve can explode when battery housing internal pressure reaches the default, realizes the inside pressure release of battery housing with this. Through all setting up first utmost point post subassembly, second utmost point post subassembly and explosion-proof valve on battery case's same surface, and the at least part of explosion-proof valve is located the isolation zone between first utmost point post subassembly and the second utmost point post subassembly, on the basis of rational utilization battery case space, and the clearance that first utmost point ear and second utmost point ear formed of drawing forth by electric core main part homonymy can form the gas storage space, and the explosion-proof valve of being convenient for is in time blown open to improve the safety in utilization performance of battery.

Drawings

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

FIG. 1 is a schematic diagram of a cylindrical battery according to an exemplary embodiment;

FIG. 2 is a partial schematic view of an exploded structure of a cylindrical battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a cylindrical battery according to an exemplary embodiment;

fig. 4 is a schematic diagram illustrating a partial structure of a cell of a cylindrical battery according to an exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a first housing member; 12. a second housing member; 13. a liquid injection hole; 20. an electric core; 21. a cell main body; 22. a first tab; 23. a second tab; 24. a spacing region; 25. a core winding hole; 30. a first pole assembly; 40. a second pole post assembly; 50. an explosion-proof valve; 60. a first current collecting member; 70. a second current collector.

Detailed Description

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

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

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

Further, in the description of the present disclosure, it 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 cylindrical battery, please refer to fig. 1 to 4, the cylindrical 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; the first pole assembly 30, the first pole assembly 30 is arranged on the battery shell 10, and the first pole assembly 30 is connected with the first pole ear 22; a second pole assembly 40, wherein the second pole assembly 40 is arranged on the battery shell 10, and the second pole assembly 40 is connected with the second pole ear 23; the explosion-proof valve 50 is arranged in the battery shell 10, and the explosion-proof valve 50 and the first pole assembly 30 and the second pole assembly 40 are positioned on the same surface of the battery shell 10; wherein, first utmost point post subassembly 30 and second utmost point post subassembly 40 interval setting to make first utmost point post subassembly 30 and second utmost point post subassembly 40 respectively with first utmost point ear 22 and the relative setting of second utmost point ear 23, explosion-proof valve 50 is located the isolation zone between first utmost point post subassembly 30 and the second utmost point post subassembly 40 partially at least, the relative both ends of isolation zone all intersect with the outward flange of battery housing 10.

The utility model discloses a cylindrical battery of embodiment includes battery housing 10, electric core 20, first utmost point post subassembly 30, second utmost point post subassembly 40 and explosion-proof valve 50, first utmost point post subassembly 30 and second utmost point post subassembly 40 are connected with first utmost point ear 22 and second utmost point ear 23 on the electric core main part 21 respectively, make first utmost point post subassembly 30 and second utmost point post subassembly 40 respectively as two electrodes of battery and draw forth the end with this, and explosion-proof valve 50 can explode when battery housing 10 internal pressure reaches the default, realize the inside pressure release of battery housing 10 with this. Through all setting up first utmost point post subassembly 30, second utmost point post subassembly 40 and explosion-proof valve 50 on battery case 10 is same surperficial, and explosion-proof valve 50's at least part is located the isolation region between first utmost point post subassembly 30 and the second utmost point post subassembly 40, on the basis in rational utilization battery case 10 space, and the clearance that first utmost point ear 22 and second utmost point ear 23 formed of drawing forth by electric core main part 21 homonymy can form the gas storage space, the explosion-proof valve 50 of being convenient for in time explodes out to improve the safety in use performance of battery.

It should be noted that, the first tab 22 and the second tab 23 extend from the same side of the battery cell main body 21, in order to ensure that the first tab 22 and the second tab 23 are arranged in an insulated manner, it is required to ensure that a certain distance exists between the first tab 22 and the second tab 23, so as to form a gas storage space, the first tab 22 and the second tab 23 are respectively connected to the first pole assembly 30 and the second pole assembly 40, and the explosion-proof valve 50, the first pole assembly 30, and the second pole assembly 40 are located on the same surface of the battery case 10, that is, the first tab 22 and the second tab 23 are also located towards the surface where the explosion-proof valve 50 is located, so that the gas storage space and the explosion-proof valve 50 are arranged relatively, thereby when it can be ensured that the gas pressure in the gas storage space reaches a preset value, the explosion-proof valve 50 can be exploded in time, and it is difficult to cause the explosion-proof valve 50 to explode due to the limitation of the internal space of the battery case 10.

First pole subassembly 30 and second pole subassembly 40 interval set up to make first pole subassembly 30 and second pole subassembly 40 set up with first utmost point ear 22 and second utmost point ear 23 respectively relatively, thereby can make things convenient for first pole subassembly 30 and second pole subassembly 40 to form with first utmost point ear 22 and second utmost point ear 23 respectively and be connected, and can make things convenient for first pole subassembly 30 and second pole subassembly 40's setting.

The first pole assembly 30 and the second pole assembly 40 may be disposed on the battery case 10 at an interval along a certain direction, so that the first pole assembly 30 and the second pole assembly 40 are disposed opposite to the first pole tab 22 and the second pole tab 23, respectively, that is, orthographic projections of the first pole assembly 30 and the first pole tab 22 on the battery cell main body 21 at least partially coincide with each other, and orthographic projections of the second pole assembly 40 and the second pole tab 23 on the battery cell main body 21 at least partially coincide with each other.

The isolation region between the first pole assembly 30 and the second pole assembly 40 can be regarded as the region formed by two tangent lines at two opposite edges of the first pole assembly 30 and the second pole assembly 40 on the battery shell 10, therefore, the opposite two ends of the isolation region are intersected with the outer edge of the battery shell 10, and the explosion-proof valve 50 is arranged in the isolation region, so that the external space of the battery shell 10 can be reasonably arranged, the pressure provided by the internal gas storage space of the battery to the explosion-proof valve 50 is relatively stable, the explosion-proof valve 50 can be timely burst, and the safety use performance of the battery is improved.

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. 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.

The battery cell can comprise a battery cell main body and a pole lug part, wherein the battery cell main body comprises a positive pole piece and a negative pole piece, and the pole lug part comprises a positive pole lug and a negative pole lug. The battery is a cylindrical battery, and the battery can be a winding battery, that is, a first pole piece, a second pole piece with an electric property opposite to that of the first pole piece, and a diaphragm piece arranged between the first pole piece and the second pole piece are wound to obtain a winding battery core. One of the first pole assembly 30 and the second pole assembly 40 is a positive pole assembly and the other is a negative pole assembly, and correspondingly, one of the first tab 22 and the second tab 23 is a positive pole tab and the other is a negative pole tab.

In one embodiment, as shown in fig. 3, the cylindrical battery further includes a first current collector 60 and a second current collector 70, and the first pole assembly 30 and the second pole assembly 40 are connected to the first pole tab 22 and the second pole tab 23 through the first current collector 60 and the second current collector 70, respectively.

In one implementation, the first pole assembly 30 and the second pole assembly 40 are directly connected with the first pole tab 22 and the second pole tab 23, respectively.

In one embodiment, the first pole assembly 30 and the second pole assembly 40 may be concentrically arranged, for example, the first pole assembly 30 is disposed through the second pole assembly 40, but it is necessary to ensure the insulation arrangement between the first pole assembly 30 and the second pole assembly 40. Or, the second pole assembly 40 is inserted into the first pole assembly 30, but it is necessary to ensure the insulation arrangement between the first pole assembly 30 and the second pole assembly 40

In one embodiment, the explosion-proof valve 50 is disposed at a distance from the first pole assembly 30, and the explosion-proof valve 50 is disposed at a distance from the second pole assembly 40, so as to not only facilitate the disposition of the explosion-proof valve 50 without affecting the disposition positions of the first pole assembly 30 and the second pole assembly 40, but also ensure that the explosion-proof valve 50 can be reliably exploded, and the disposition position of the explosion-proof valve 50 does not affect the overall strength of the battery housing 10.

In one embodiment, as shown in fig. 2, the first tab 22 and the second tab 23 are arranged at a distance, the cell main body 21 includes a separation region 24, and the separation region 24 is located on an end surface of the cell main body 21 from which the first tab 22 and the second tab 23 are led out, and is located between the first tab 22 and the second tab 23; wherein, the at least partial interval region 24 of orthographic projection of explosion-proof valve 50 orientation interval region 24 coincides mutually, and explosion-proof valve 50 sets up with interval region 24 relatively promptly, and the space above interval region 24 can be used for the storage gas to can be when battery case 10 internal pressure reaches the default, explosion-proof valve 50 can in time explode, thereby realizes the quick pressure release of battery, thereby guarantees the security performance of battery.

As shown in fig. 2 and fig. 4, the first tab 22 and the second tab 23 are spaced apart from each other, a gas storage space is formed between the first tab 22 and the second tab 23, and the spacing region 24 is opposite to the explosion-proof valve 50, i.e., the spacing region 24 and the battery case 10 can be used for storing gas, so that a large amount of gas can be accumulated in the gas storage space, and the explosion-proof valve 50 can be ensured to burst open in time.

In one embodiment, the width between the first tab 22 and the second tab 23 is 4mm-20mm, that is, the width of the spacing region 24 is 4mm-20mm, and on the basis of ensuring the overcurrent capacity of the first tab 22 and the second tab 23, the area of the air storage space formed between the first tab 22 and the second tab 23 can also be ensured to be relatively large, so as to ensure that the explosion-proof valve 50 can normally burst.

The width between the first tab 22 and the second tab 23 may be 4mm, 5mm, 6mm, 8mm, 10mm, 15mm, 18mm, 19mm, or 20mm, etc.

An excessively large width range between the first tab 22 and the second tab 23 may result in a slow transmission rate of the first tab 22 and the second tab 23 and an insufficient current capacity of the first tab 22 and the second tab 23. And the width range between the first tab 22 and the second tab 23 is too small, which results in insufficient air storage space and affects the normal explosion of the explosion-proof valve 50. In the present embodiment, the width between the first tab 22 and the second tab 23 is in the range of 4mm to 20mm, which can avoid the above situation.

It should be noted that the isolation region between the first pole assembly 30 and the second pole assembly 40 is disposed opposite the spacing region 24.

In one embodiment, as shown in fig. 4, the battery cell main body 21 further includes a core winding hole 25, at least a portion of one end of the core winding hole 25 is located in the spacing region 24, that is, the spacing region 24 and a port of the core winding hole 25 may intersect, so that the core winding hole 25 can communicate with the gas storage space above the spacing region 24, thereby ensuring reliable accumulation of gas, ensuring that the explosion-proof valve 50 can be opened in time, and improving the safety performance of the battery.

The core winding aperture 25 of the cell body 21 may be located in a central region of the cell body 21, and the first and

second pole assemblies

30 and 40 may be located on either side of the core winding aperture 25.

In one embodiment, the explosion-proof valve 50 and the battery case 10 may be separated, that is, an explosion-proof hole may be formed in the battery case 10, and the explosion-proof valve 50 is connected to the battery case 10, so as to shield the explosion-proof hole, and the explosion-proof valve 50 includes a weak region, so that when the internal pressure of the battery case 10 reaches a preset value, the weak region bursts, so as to implement pressure relief.

In one embodiment, the explosion-proof valve 50 and at least a portion of the battery case 10 are integrally formed, which not only simplifies the structure, but also reduces the number of manufacturing processes, thereby improving the forming efficiency of the explosion-proof valve 50.

The explosion-proof valve 50 is formed integrally with at least a part of the battery case 10, and for example, a part of the battery case 10 may be thinned to form the explosion-proof valve 50. Alternatively, the battery case 10 may be partially thinned during the molding process to serve as the explosion-proof valve 50, thereby performing the pressure relief function, and the process is relatively simple, so that the molding efficiency of the explosion-proof valve 50 may be improved.

In one embodiment, the battery case 10 may be provided with a notch, so as to thin the battery case 10, and form the explosion-proof valve 50, so as to meet the requirement of explosion-proof, thereby achieving the pressure relief effect. The battery case 10 may be provided with a cross-shaped notch, or the battery case 10 may be provided with a circular-arc-shaped notch, etc., which is not limited herein.

In one embodiment, the orthographic projections of the first pole assembly 30 and the second pole assembly 40 on the battery housing 10 are a first projection and a second projection, the first projection and the second projection are respectively located at two opposite sides of the central area of the battery housing 10, and the explosion-proof valve 50 is arranged deviating from the central point connecting line of the first projection and the second projection, so that the first pole assembly 30, the second pole assembly 40 and the explosion-proof valve 50 can be prevented from being reasonably arranged, the whole strength of the battery housing 10 can be prevented from being influenced by the explosion-proof valve 50, and the safety use performance of the battery can be improved.

The first projection and the second projection are arranged at an interval with the explosion-proof valve 50, and the explosion-proof valve 50 is arranged by deviating from the central point connecting line of the first projection and the second projection, namely, the explosion-proof valve 50 is not arranged on the central point connecting line of the first projection and the second projection, so that the situation that the distance between the explosion-proof valve 50 and the first pole post assembly 30 and the distance between the explosion-proof valve 50 and the second pole post assembly 40 are short can be avoided, and the overall structural strength of the battery shell 10 is ensured.

The first projection and the second projection are respectively located on two opposite sides of a central region of the battery housing 10, and the central region of the battery housing 10 can be regarded as a surface positive center position of the battery housing 10, so that the first pole post assembly 30 and the second pole post assembly 40 can be respectively arranged at two opposite ends of a central line of the battery housing 10, and the first pole post assembly 30 and the second pole post assembly 40 can be reasonably arranged.

In one embodiment, the explosion-proof valve 50 is located outside the area between the first projection and the second projection, i.e., the explosion-proof valve 50 is not disposed between the first pole assembly 30 and the second pole assembly 40, but is disposed offset from the area between the first pole assembly 30 and the second pole assembly 40, thereby avoiding the decrease in the strength of the overall structure of the battery housing 10 caused by the disposition of the explosion-proof valve 50 between the first pole assembly 30 and the second pole assembly 40, which affects the assembly of the first pole assembly 30 and the second pole assembly 40.

The area between the first projection and the second projection can be regarded as the largest area formed by the connecting line of the outer edges of the first projection and the second projection, and as shown in fig. 1, the area between the first projection and the second projection can be regarded as the area surrounded by the connecting line of the upper end point and the lower end point of the first pole post assembly 30 and the second pole post assembly 40.

In one embodiment, as shown in fig. 1 and 2, the battery case 10 is provided with a liquid injection hole 13, and the liquid injection hole 13 and the explosion-proof valve 50 are located on the same surface of the battery case 10, thereby improving the space utilization rate of the same surface of the battery case 10. The electrolyte can be injected into the battery case 10 through the injection hole 13, thereby impregnating the battery cell 20.

In one embodiment, the first pole assembly 30 and the second pole assembly 40 are symmetrically arranged about the connection between the central point of the liquid injection hole 13 and the central point of the explosion-proof valve 50, so that the first pole assembly 30, the second pole assembly 40, the explosion-proof valve 50 and the liquid injection hole 13 can be reasonably distributed on the same surface of the battery case 10, and the first pole assembly 30, the second pole assembly 40, the explosion-proof valve 50 and the liquid injection hole 13 can be ensured to be relatively uniformly distributed on the same surface of the battery case 10, so that the stress uniformity of the battery case 10 is ensured, and the structural strength of the battery case 10 is ensured.

The injection hole 13 and the explosion-proof valve 50 are located on opposite sides of a line connecting the center points of the first pole assembly 30 and the second pole assembly 40, respectively, as shown in fig. 1 and 2.

It should be noted that the center points of the first projection and the second projection, or the center points of the first pole assembly 30 and the second pole assembly 40, are not specific to the first projection and the second projection having a certain center point, for example, the first projection is a circle, and in this case, the first projection and the center point may be regarded as the center point of the circle.

In one embodiment, as shown in conjunction with fig. 1-3, the battery case 10 includes: the first housing piece 11, the first pole post assembly 30, the second pole post assembly 40 and the explosion-proof valve 50 are all arranged on the first housing piece 11; the second housing part 12, the second housing part 12 being connected to the first housing part 11 in order to seal the electrical core 20, so that a reliable protection of the electrical core 20 is possible.

The first housing part 11 and the second housing part 12 may each comprise a receiving space, and the first housing part 11 and the second housing part 12 form a space for receiving the cell 20 after being connected.

Or, the first housing part 11 is a cover plate, the second housing part 12 may include an accommodating space, a space for accommodating the battery cell 20 is formed after the first housing part 11 and the second housing part 12 are connected, and the first pole post assembly 30, the second pole post assembly 40 and the explosion-proof valve 50 are all disposed on the cover plate, which is not only simple in structure, but also can facilitate the disposition of the first pole post assembly 30, the second pole post assembly 40 and the explosion-proof valve 50.

It should be noted that the second housing member 12 may include a main body portion and a cover body portion, the main body portion and the cover body portion may be separate structures, the cover body portion may be similar to the cover plate, and the cover body portion may be disposed opposite to the cover plate. The body portion and the cover portion may be welded or otherwise connected. Or, the second housing member 12 may be an integrally formed structure, which is not only simple to manufacture, but also relatively high in manufacturing efficiency, and can ensure reliable sealing performance.

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

The utility model discloses a group battery of embodiment includes the cylinder battery, the cylinder battery includes battery housing 10, electric core 20, first utmost point post subassembly 30, second utmost point post subassembly 40 and explosion-proof valve 50, first utmost point post subassembly 30 and second utmost point post subassembly 40 are connected with first utmost point ear 22 and second utmost point ear 23 on the electric core main part 21 respectively, make first utmost point post subassembly 30 and second utmost point post subassembly 40 draw forth the end as two electrodes of battery respectively with this, and explosion-proof valve 50 can explode when battery housing 10 internal pressure reaches the default, realize the inside pressure release of battery housing 10 with this. Through with first utmost point post subassembly 30, second utmost point post subassembly 40 and explosion-proof valve 50 all set up on battery case 10's same surface, and at least part of explosion-proof valve 50 is located the isolation region between first utmost point post subassembly 30 and the second utmost point post subassembly 40, on the basis in rational utilization battery case 10 space, and the clearance that first utmost point ear 22 and second utmost point ear 23 formed of drawing forth by electric core main part 21 homonymy can form the gas storage space, the explosion-proof valve 50 of being convenient for in time explodes out, thereby improve the safety in use performance of group battery.

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 the cylinder battery, and the battery module can also include the bracket, and the battery can be fixed in on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of 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 within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

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

Claims

1. A cylindrical 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);

the first pole assembly (30), the first pole assembly (30) is arranged on the battery shell (10), and the first pole assembly (30) is connected with the first pole lug (22);

a second pole assembly (40), wherein the second pole assembly (40) is arranged on the battery shell (10), and the second pole assembly (40) is connected with the second pole ear (23);

an explosion-proof valve (50), the explosion-proof valve (50) being disposed in the battery housing (10) and being located on the same surface of the battery housing (10) as the first and second pole assemblies (30, 40);

wherein the first pole assembly (30) and the second pole assembly (40) are arranged at intervals, so that the first pole assembly (30) and the second pole assembly (40) are respectively arranged opposite to the first pole lug (22) and the second pole lug (23), at least part of the explosion-proof valve (50) is positioned in an isolation area between the first pole assembly (30) and the second pole assembly (40), and the two opposite ends of the isolation area are intersected with the outer edge of the battery shell (10).

2. The cylindrical battery according to claim 1, wherein the first tab (22) is spaced apart from the second tab (23), the cell body (21) comprises a spacing region (24), and the spacing region (24) is located on an end surface of the cell body (21) from which the first tab (22) and the second tab (23) lead out, and is located between the first tab (22) and the second tab (23);

wherein an orthographic projection of the explosion-proof valve (50) towards the separation region (24) at least partially coincides with the separation region (24).

3. The cylindrical battery according to claim 2, wherein the width between the first tab (22) and the second tab (23) ranges from 4mm to 20mm.

4. The cylindrical battery according to claim 2, wherein the cell body (21) further comprises a core winding hole (25), and at least a part of one end of the core winding hole (25) is located in the spacing region (24).

5. The cylindrical battery according to any one of claims 1 to 4, wherein the explosion-proof valve (50) is of an integrally formed structure with at least a portion of the battery case (10).

6. The cylindrical battery according to any one of claims 1 to 4, wherein orthographic projections of the first pole assembly (30) and the second pole assembly (40) on the battery housing (10) are a first projection and a second projection, the first projection and the second projection are respectively located on two opposite sides of a central area of the battery housing (10), and the explosion-proof valve (50) is arranged offset from a central point connecting line of the first projection and the second projection.

7. Cylindrical battery according to claim 6, characterized in that the explosion-proof valve (50) is located outside the area between the first projection and the second projection.

8. The cylindrical battery according to any one of claims 1 to 4 wherein a liquid injection hole (13) is provided in the battery case (10), the liquid injection hole (13) and the explosion-proof valve (50) being located on the same surface of the battery case (10).

9. The cylindrical battery according to claim 8, characterized in that the first pole assembly (30) and the second pole assembly (40) are symmetrically arranged with respect to the connection between the central point of the pour hole (13) and the central point of the explosion-proof valve (50).

10. The cylindrical battery according to any one of claims 1 to 4, wherein the battery case (10) comprises:

the first shell piece (11), wherein the first pole assembly (30), the second pole assembly (40) and the explosion-proof valve (50) are arranged on the first shell piece (11);

a second housing part (12), wherein the second housing part (12) is connected to the first housing part (11) in order to seal the electrical core (20);

wherein the first housing part (11) is a cover plate.