CN217848107U - Cylindrical battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and proposes a cylindrical battery, comprising: a battery case; an electric cell, which is arranged in the battery case, and the electric cell includes a main body of the electric cell, a first tab and a second tab. A pole lug and a second pole lug extend from the same side of the main body of the cell; the first pole assembly is arranged on the battery case, and the first pole assembly is connected to the first pole lug; Two pole assembly, the second pole assembly is arranged in the battery case, the second pole assembly is connected with the second pole ear; explosion-proof valve, the explosion-proof valve is placed in the battery case, and is connected with the first pole assembly and the second pole assembly The pole assembly is located on the same surface of the battery case, and the explosion-proof valve is located in the isolation area between the first pole assembly and the second pole assembly. The gap formed by the first lug and the second lug can form a gas storage space, which is convenient for the explosion-proof valve to explode in time, thereby improving the safe use performance of the battery.

Description

Cylindrical battery

technical field

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

Background technique

In the related art, the explosion-proof valve of the battery is used to protect the battery so that it can explode in time when the internal pressure of the battery reaches a certain height. However, due to the limitation of the internal space of the battery, it is prone to the problem that the explosion-proof valve cannot be opened in time.

Utility model content

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

The utility model provides a cylindrical 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 pole assembly, the first pole assembly is disposed on the battery case, and the first pole assembly is connected to the first tab;

a second pole assembly, the second pole assembly is disposed on the battery case, and the second pole assembly is connected to the second tab;

An explosion-proof valve, the explosion-proof valve is placed in the battery case, and is located on the same surface of the battery case as the first pole assembly and the second pole assembly;

Wherein, the first pole assembly and the second pole assembly are arranged at intervals, so that the first pole assembly and the second pole assembly are respectively arranged opposite to the first pole lug and the second pole lug, and at least part of the explosion-proof valve is located on the second pole pole assembly. In the isolation area between the first pole assembly and the second pole assembly, opposite ends of the isolation area intersect with the outer edge of the battery case.

The cylindrical battery of the embodiment of the utility model includes a battery case, a battery cell, a first pole assembly, a second pole assembly and an explosion-proof valve. One pole lug is connected with the second pole lug, so that the first pole assembly and the second pole assembly are respectively used as the two electrode leads of the battery, and the explosion-proof valve can be used when the internal pressure of the battery case reaches a preset value. It can be exploded to realize pressure relief inside the battery case. By arranging the first pole assembly, the second pole assembly and the explosion-proof valve on the same surface of the battery case, and at least part of the explosion-proof valve is located in the isolation area between the first pole assembly and the second pole assembly Inside, on the basis of rational use of the space of the battery case, the gap formed by the first lug and the second lug drawn out from the same side of the main body of the battery cell can form a gas storage space, which is convenient for the explosion-proof valve to burst open in time, thereby improving the battery life. safe use performance.

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 cylindrical battery according to an exemplary embodiment;

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

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

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

The reference signs are explained as follows:

10. Battery casing; 11. First casing part; 12. Second casing part; 13. Liquid injection hole; 20. Battery cell; 21. Battery cell main body; 22. First tab; 23. Second Tab; 24. Interval area; 25. Core hole; 30. First pole assembly; 40. Second pole assembly; 50. Explosion-proof valve; 60. First collector; 70. Second collector .

Detailed ways

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 invention provides a cylindrical battery, please refer to Fig. 1 to Fig. 4, the cylindrical battery includes: a battery case 10; The battery core body 21, the first pole lug 22 and the second pole lug 23, the first pole lug 22 and the second pole lug 23 extend from the same side of the battery core body 21; the first pole assembly 30, the first pole The post assembly 30 is arranged on the battery casing 10, the first pole assembly 30 is connected to the first tab 22; the second pole assembly 40, the second pole assembly 40 is arranged on the battery casing 10, the second pole assembly 40 is connected to the second pole ear 23; the explosion-proof valve 50, the explosion-proof valve 50 is placed in the battery case 10, and is located on the same surface of the battery case 10 as the first pole assembly 30 and the second pole assembly 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 tab 22 and the second tab 23, and the explosion-proof valve At least part of 50 is located in the isolation area between the first pole assembly 30 and the second pole assembly 40 , and the opposite ends of the isolation area intersect the outer edge of the battery case 10 .

A cylindrical battery according to an embodiment of the present invention includes a battery case 10, a cell 20, a first pole assembly 30, a second pole assembly 40 and an explosion-proof valve 50, the first pole assembly 30 and the second pole assembly 40 They are respectively connected to the first tab 22 and the second tab 23 on the cell main body 21, so that the first pole assembly 30 and the second pole assembly 40 are respectively used as the two electrode lead-out ends of the battery, and the explosion-proof The valve 50 can burst open when the internal pressure of the battery case 10 reaches a preset value, so as to release the pressure inside the battery case 10 . By arranging the first pole assembly 30, the second pole assembly 40 and the explosion-proof valve 50 on the same surface of the battery case 10, and at least part of the explosion-proof valve 50 is located between the first pole assembly 30 and the second pole In the isolation area between the components 40, on the basis of rational use of the space of the battery case 10, the gap formed by the first tab 22 and the second tab 23 drawn out from the same side of the cell body 21 can form a gas storage space , it is convenient for the explosion-proof valve 50 to explode in time, thereby improving the safe use performance of the battery.

It should be noted that the first tab 22 and the second tab 23 extend from the same side of the cell body 21. In order to ensure the insulation between the first tab 22 and the second tab 23, it is necessary to ensure that the first tab 22 and the second tab 23 are insulated. There is a certain distance between the pole lug 22 and the second pole lug 23 to form a gas storage space, and the first pole lug 22 and the second pole lug 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 set toward the surface where the explosion-proof valve 50 is located. Therefore, the gas storage space and the explosion-proof valve 50 can be set opposite to each other, so as to ensure that when the gas pressure in the gas storage space reaches a preset value, the explosion-proof valve 50 can burst open in time, and it is not easy to occur because the internal space of the battery case 10 is affected. The limit causes the explosion-proof valve 50 to be difficult to explode.

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, so that it is convenient The first pole assembly 30 and the second pole assembly 40 are connected to the first pole assembly 22 and the second pole assembly 23 respectively, and can facilitate the arrangement of the first pole assembly 30 and the second pole assembly 40 .

The first pole assembly 30 and the second pole assembly 40 can be arranged on the battery case 10 at intervals along a certain direction, so that the first pole assembly 30 and the second pole assembly 40 can be connected with the first pole assembly respectively. The ear 22 and the second pole lug 23 are oppositely arranged, that is, the orthographic projections of the first pole assembly 30 and the first pole lug 22 on the cell main body 21 are at least partially coincident, and the second pole assembly 40 and the second pole lug 23 The orthographic projections on the cell main body 21 are at least partially coincident.

The isolation area between the first pole assembly 30 and the second pole assembly 40 can be considered to be formed by two tangent lines on the two opposite edges of the first pole assembly 30 and the second pole assembly 40 on the battery case 10 Therefore, the opposite ends of the isolation area intersect with the outer edge of the battery case 10, and the explosion-proof valve 50 is arranged in the isolation area, not only the external space of the battery case 10 can be rationally arranged, but also the interior of the battery can be made The pressure provided by the gas storage space to the explosion-proof valve 50 is relatively stable, so as to ensure that the explosion-proof valve 50 can burst open in time, thereby improving the safe use performance of the battery.

Batteries consist of cells and electrolytes, the smallest unit capable of performing 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.

The cell may include a cell main body and a tab part, the cell main body includes a positive electrode sheet and a negative electrode sheet, and the tab part includes a positive electrode tab and a negative electrode tab. The battery is a cylindrical battery, and the battery can be a wound battery, that is, the first pole piece, the second pole piece that is electrically opposite to the first pole piece, and the diaphragm that is arranged between the first pole piece and the second pole piece. Winding to obtain a wound-type electric 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. Correspondingly, one of the first pole lug 22 and the second pole lug 23 is a positive pole pole assembly. ear, and the other is the negative pole ear.

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 pass through the first current collector respectively. 60 and the second current collector 70 are connected with the first tab 22 and the second tab 23 .

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

In one embodiment, the first pole assembly 30 and the second pole assembly 40 can be arranged concentrically, for example, the first pole assembly 30 penetrates the second pole assembly 40, but it is necessary to ensure that the first pole assembly 30 and the second pole assembly 40 are insulated. Alternatively, the second pole assembly 40 is passed through the first pole assembly 30, but it is necessary to ensure the insulation between the first pole assembly 30 and the second pole assembly 40

In one embodiment, the explosion-proof valve 50 is spaced from the first pole assembly 30, and the explosion-proof valve 50 is spaced from the second pole assembly 40, which not only facilitates the setting of the explosion-proof valve 50, but also does not affect the first pole assembly 30. And the setting position of the second pole assembly 40 can also ensure that the explosion-proof valve 50 can be reliably exploded, and the setting position of the explosion-proof valve 50 will not affect the overall strength of the battery case 10 .

In one embodiment, as shown in FIG. 2 , the first tab 22 and the second tab 23 are arranged at intervals, and the cell main body 21 includes a spacer area 24 . The end surface of the second lug 23 is located between the first lug 22 and the second lug 23; wherein, the orthographic projection of the explosion-proof valve 50 towards the interval area 24 at least partially coincides with the interval area 24, that is, the explosion-proof valve 50 It is set opposite to the interval area 24, and the space above the interval area 24 can be used to store gas, so that when the internal pressure of the battery case 10 reaches a preset value, the explosion-proof valve 50 can burst open in time, so as to realize the rapid discharge of the battery. pressure, so as to ensure the safety performance of the battery.

As shown in FIG. 2 and FIG. 4 , the first tab 22 and the second tab 23 are arranged at intervals, a gas storage space is formed between the first tab 22 and the second tab 23 , and the space between the area 24 and the explosion-proof valve 50 The relative arrangement means that the space between the spacer area 24 and the battery case 10 can be used for gas storage, so that a large amount of gas can be accumulated in the gas storage space, thereby ensuring that the explosion-proof valve 50 can burst open in time.

In one embodiment, the width range between the first tab 22 and the second tab 23 is 4mm-20mm, that is, the width range of the spacer region 24 is 4mm-20mm, ensuring that the first tab 22 and the second tab On the basis of the flow capacity of the lug 23 , it can also ensure that the area of the gas storage space formed between the first lug 22 and the second lug 23 is relatively large, so as to ensure that the explosion-proof valve 50 can explode normally.

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

If the width range between the first tab 22 and the second tab 23 is too large, the transmission rate through the first tab 22 and the second tab 23 will be slow, and the first tab 22 and the second tab will 23 The over-current capability is not enough. However, the width range between the first lug 22 and the second lug 23 is too small, resulting in insufficient gas storage space, which affects the normal explosion of the explosion-proof valve 50 . In this embodiment, the width range between the first tab 22 and the second tab 23 is 4mm-20mm, which can avoid the occurrence of the above situation.

It should be noted that the isolation area between the first pole assembly 30 and the second pole assembly 40 is opposite to the spacer area 24 .

In one embodiment, as shown in FIG. 4 , the battery core body 21 also includes a winding core hole 25, at least part of one end of the winding core hole 25 is located in the separation area 24, that is, the separation area 24 and the port of the winding core hole 25 can be Intersect, so that the winding core hole 25 can be communicated with the gas storage space above the interval area 24, so as to ensure the reliable accumulation of gas, so as to ensure that the explosion-proof valve 50 can burst open in time, and improve the safety performance of the battery.

The winding core hole 25 of the battery core body 21 may be located in the central area of the battery core body 21 , and the first pole assembly 30 and the second pole assembly 40 may be respectively located at two sides of the winding core hole 25 .

In one embodiment, the explosion-proof valve 50 and the battery case 10 can be set separately, that is, the battery case 10 can be provided with an explosion-proof hole, and the explosion-proof valve 50 is connected to the battery case 10, so as to realize the anti-explosion For the shielding of the hole, the explosion-proof valve 50 includes a weak area, so that when the internal pressure of the battery case 10 reaches a preset value, the weak area bursts open to realize pressure relief.

In one embodiment, at least part of the explosion-proof valve 50 and the battery case 10 are integrally formed, which not only has a simple structure, but also can reduce manufacturing processes, thereby improving the molding efficiency of the explosion-proof valve 50 .

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

In one embodiment, notches may be provided on the battery case 10 , so as to implement thinning treatment on the battery case 10 to form an explosion-proof valve 50 , so as to meet the requirement of explosion-proof and achieve a pressure relief effect. The battery case 10 may be provided with cross-shaped notches, or the battery case 10 may be provided with arc-shaped notches, etc., which are not limited herein.

In one embodiment, the orthographic projections of the first pole assembly 30 and the second pole assembly 40 on the battery case 10 are a first projection and a second projection, and the first projection and the second projection are located on the battery case 10 respectively. On the opposite sides of the central area, the explosion-proof valve 50 is set away from the line connecting the center points of the first projection and the second projection, so as to avoid ensuring that the first pole assembly 30, the second pole assembly 40, and the explosion-proof valve 50 are reasonably arranged, and It can prevent the explosion-proof valve 50 from affecting the overall strength of the battery casing 10, thereby improving the safe use performance of the battery.

The first projection and the second projection are spaced apart from the explosion-proof valve 50, and the explosion-proof valve 50 is deviated from the line connecting the center points of the first projection and the second projection, that is, the explosion-proof valve 50 will not be arranged at the center of the first projection and the second projection Dotted line, so that the distance between the explosion-proof valve 50 and the first pole assembly 30 and the second pole assembly 40 can be avoided, so as to ensure the overall structural strength of the battery case 10 .

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

In one embodiment, the explosion-proof valve 50 is located outside the area between the first projection and the second projection, that is, the explosion-proof valve 50 is not arranged between the first pole assembly 30 and the second pole assembly 40 , but deviates from The area between the first pole assembly 30 and the second pole assembly 40 prevents the explosion-proof valve 50 from being arranged between the first pole assembly 30 and the second pole assembly 40, resulting in a decrease in the overall structural strength of the battery case 10 , affecting 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 considered as the largest area formed by the connecting line of the outer edge of the first projection and the second projection. As shown in Figure 1, the area between the first projection and the second projection It can be regarded as the area enclosed by the line connecting the upper and lower ends of the first pole assembly 30 and the second pole assembly 40 .

In one embodiment, as shown in Figures 1 and 2, a liquid injection hole 13 is provided on the battery casing 10, and the liquid injection hole 13 and the explosion-proof valve 50 are located on the same surface of the battery casing 10, thereby improving the battery casing. The space utilization of the same surface of the body 10. The electrolyte solution can be injected into the interior of the battery case 10 through the liquid injection hole 13 , so as to realize the wetting of the battery cell 20 .

In one embodiment, the first pole assembly 30 and the second pole assembly 40 are arranged symmetrically with respect to the connection between the center point of the liquid injection hole 13 and the center point of the explosion-proof valve 50, so that the first pole assembly 30 can , 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 can ensure that the first pole assembly 30, the second pole assembly 40, the explosion-proof valve 50 and the liquid injection holes 13 are relatively evenly arranged on the same surface of the battery case 10 , so as to ensure the uniform force of the battery case 10 , thereby ensuring the structural strength of the battery case 10 .

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

It should be noted that the center point of the first projection and the second projection, or the center point of the first pole assembly 30 and the second pole assembly 40 does not specifically mean that the first projection and the second projection have a definite center point , for example, the first projection is a circle, at this time, the first projection and the center point can be considered as the center point of the circle.

In one embodiment, as shown in FIG. 1 to FIG. 3 , the battery case 10 includes: a first case part 11 , a first pole assembly 30 , a second pole assembly 40 and an explosion-proof valve 50 are all disposed on the first pole assembly 11 . On the shell part 11 ; the second shell part 12 , the second shell part 12 is connected with the first shell part 11 to seal the electric core 20 , so that the reliable protection of the electric core 20 can be achieved.

The first housing part 11 and the second housing part 12 may both include a receiving space, and the first housing part 11 and the second housing part 12 are connected to form a space for accommodating the electric core 20 .

Alternatively, the first housing part 11 is a cover plate, and the second housing part 12 may include an accommodating space. After the first housing part 11 and the second housing part 12 are connected, a space for accommodating the electric core 20 is formed, and the first The pole assembly 30 , the second pole assembly 40 and the explosion-proof valve 50 are all disposed on the cover plate, which not only has a simple structure, but also facilitates the installation of the first pole assembly 30 , the second pole assembly 40 and the explosion-proof valve 50 .

It should be noted that the second housing part 12 may include a main body and a cover body, the main body and the cover body may be a separate structure, the structure of the cover body may be similar to the cover plate, and the cover body portion may be connected to the cover plate relative settings. The main body and the cover can be connected by welding or other connection methods. Alternatively, the second housing part 12 may be of an integrated 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 present invention also provides a battery pack, including the above-mentioned cylindrical battery.

The battery pack of one embodiment of the present invention includes a cylindrical battery, and the cylindrical battery includes a battery case 10, a cell 20, a first pole assembly 30, a second pole assembly 40 and an explosion-proof valve 50, the first pole assembly 30 and The second pole assembly 40 is respectively connected to the first tab 22 and the second tab 23 on the cell main body 21, so that the first pole assembly 30 and the second pole assembly 40 are respectively used as two poles of the battery. The electrode lead-out end, and the explosion-proof valve 50 can burst open when the internal pressure of the battery case 10 reaches a preset value, so as to realize the internal pressure release of the battery case 10 . By arranging the first pole assembly 30, the second pole assembly 40 and the explosion-proof valve 50 on the same surface of the battery case 10, and at least part of the explosion-proof valve 50 is located between the first pole assembly 30 and the second pole In the isolation area between the components 40, on the basis of rational use of the space of the battery case 10, the gap formed by the first tab 22 and the second tab 23 drawn out from the same side of the cell body 21 can form a gas storage space , it is convenient for the explosion-proof valve 50 to explode in time, thereby improving the safe use performance of the battery pack.

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

The battery module includes a plurality of batteries, and the batteries may be cylindrical batteries. The battery module may also include a bracket, and the batteries may 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 (10)

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.

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