Battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and a battery pack, the battery comprises a shell, a top cover, a first pole, a second pole and a first explosion-proof valve, the top cover is connected with the shell along a first direction, and the top cover is provided with a liquid injection hole penetrating along the first direction; the first pole and the second pole penetrate through the top cover, the second pole and the first pole are arranged at an interval in the second direction, and the liquid injection hole is located between the first pole and the second pole in the second direction; the first anti-explosion valve is connected to the top cover and located on the side, away from the second pole, of the first pole in the second direction, the liquid injection hole is located between the first pole and the second pole, the first anti-explosion valve is arranged on the side, away from the second pole, of the first pole, and the first anti-explosion valve and the liquid injection hole are separated through the first pole. And the distance between the liquid injection hole and the anti-explosion valve is relatively long, so that the risk that electrolyte invades the anti-explosion valve is relatively small when the battery is injected, and the production quality of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery and battery package. BACKGROUND

[0002] In the related art, the liquid injection hole and the explosion-proof valve of the battery are arranged between the two pole columns, and in order to meet the pressure relief capacity, the size of the explosion-proof valve is usually made large, but the space between the two pole columns is limited, therefore, the distance between the liquid injection hole and the explosion-proof valve is relatively close, and the risk of electrolyte invading the explosion-proof valve is relatively large when the battery is liquid injected. SUMMARY

[0003] The primary object of the utility model is to provide a battery, the risk of electrolyte invading the explosion-proof valve is relatively small when the battery is liquid injected.

[0004] In order to achieve the above object, the utility model provides a battery with intersecting first direction and second direction, comprising:

[0005] A shell,

[0006] A top cover connected with the shell along the first direction, the top cover is provided with a liquid injection hole penetrating through it;

[0007] A first pole column arranged in the top cover;

[0008] A second pole column arranged in the top cover and spaced apart from the first pole column along the second direction, and along the second direction, the liquid injection hole is located between the first pole column and the second pole column;

[0009] A first explosion-proof valve connected to the top cover and located on the side of the first pole column away from the second pole column along the second direction.

[0010] In a specific embodiment of the utility model, the battery further comprises a second explosion-proof valve, the second explosion-proof valve is connected to the top cover and located on the side of the second pole column away from the first pole column along the second direction.

[0011] In a specific embodiment of the utility model, the first explosion-proof valve comprises a valve body and a first notch, the valve body is connected with the top cover, the shell has a bottom wall, the bottom wall is arranged opposite to the top cover along the first direction, the first notch is arranged on the side of the valve body away from the bottom wall, and the first notch is recessed in the direction close to the bottom wall along the first direction.

[0012] In a specific embodiment of the utility model, along the first direction, the top cover is provided with a mounting hole penetrating through it, the projection of the circumferential hole wall of the mounting hole is a polygon, and the valve body covers the mounting hole.

[0013] In a specific embodiment of the utility model, the battery further comprises a third explosion-proof valve, the third explosion-proof valve is arranged on the shell, the third explosion-proof valve has a thinning area, the third explosion-proof valve is integrally formed with the shell, a second score is arranged on the side of the thinning area away from the interior of the shell, the second score is arranged in the thinning area, the second score is recessed towards the interior of the shell, and the depth of the second score along the first direction is not greater than the depth of the first score along the first direction.

[0014] In a specific embodiment of the utility model, the shell comprises a bottom wall and a side wall, and the side wall is connected with the top cover and the bottom wall at both ends along the first direction.

[0015] The third explosion-proof valve is arranged on the bottom wall or the side wall.

[0016] In a specific embodiment of the utility model, the third explosion-proof valve is arranged on the bottom wall, an explosion-proof hole is arranged on the bottom wall along the first direction, and the circumferential hole wall of the explosion-proof hole is projected as a rectangle on the plane where the bottom wall is located along the first direction.

[0017] In a specific embodiment of the utility model, the second score comprises a first sub-score and a second sub-score, the first sub-score and the second sub-score are in strip shape, and the first sub-score and the second sub-score intersect.

[0018] In a specific embodiment of the utility model, the second score comprises a plurality of third sub-scores and at least one fourth sub-score, the third sub-score and the fourth sub-score are in strip shape, the plurality of third sub-scores are sequentially connected to form a surrounding structure with a gap, and the fourth sub-score is arranged at the gap and is spaced apart from the third sub-score.

[0019] The utility model further provides a battery pack, which comprises a box body and the battery as described above.

[0020] Compared with the prior art, the battery and the battery pack provided by the embodiments of the utility model have the beneficial effects that:

[0021] In the battery provided by the embodiments of the utility model, the liquid injection hole is located between the first pole and the second pole, the first explosion-proof valve is arranged on the side of the first pole away from the second pole, and the first explosion-proof valve and the liquid injection hole are separated by the first pole. Therefore, the distance between the liquid injection hole and the explosion-proof valve is relatively far, the risk of electrolyte invading the explosion-proof valve is relatively small when the battery is injected with liquid, and the production quality of the battery is beneficially ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the perspective view of the battery of the embodiments of the utility model;

[0023] Figure 2 is a structure diagram of the top cover and the first first explosion-proof valve of the embodiment of the utility model;

[0024] Figure 3 is a structure diagram of the first first explosion-proof valve of the embodiment of the utility model;

[0025] Figure 4 is a structure diagram of the top cover and the second first explosion-proof valve of the embodiment of the utility model;

[0026] Figure 5 is a structure diagram of the second first explosion-proof valve of the embodiment of the utility model;

[0027] Figure 6 is a structure diagram of the top cover and the third first explosion-proof valve of the embodiment of the utility model;

[0028] Figure 7 is a structure diagram of the third first explosion-proof valve of the embodiment of the utility model;

[0029] Figure 8 is a structure diagram of the bottom wall and the first second explosion-proof valve of the embodiment of the utility model;

[0030] Figure 9 is a structure diagram of the bottom wall and the second second explosion-proof valve of the embodiment of the utility model;

[0031] Figure 10 is a structure diagram of the side wall and the third second explosion-proof valve of the embodiment of the utility model;

[0032] Figure 11 is a structure diagram of the bottom wall and the fourth second explosion-proof valve of the embodiment of the utility model;

[0033] Figure 12 is a structure diagram of the bottom wall and the fifth second explosion-proof valve of the embodiment of the utility model;

[0034] Figure 13 is a structure diagram of the bottom wall and the sixth second explosion-proof valve of the embodiment of the utility model;

[0035] Figure 14 is a structure diagram of the bottom wall and the seventh second explosion-proof valve of the embodiment of the utility model.

[0036] In the figure, Z, first direction; X, second direction; 1, shell; 12, bottom wall; 13, side wall; 101, top cover; 1011, liquid injection hole; 1012, mounting hole; 2, first pole; 3, second pole; 4, first explosion-proof valve; 41, valve body; 42, first score; 5, second explosion-proof valve; 6, third explosion-proof valve; 601, thinning area; 602, second score; 6021, first sub-score; 6022, second sub-score; 6023, third sub-score; 6024, fourth sub-score; 7, protective diaphragm; 100, notch. DETAILED DESCRIPTION

[0037] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless specifically stated and limited otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0041] In the application embodiment, "parallel" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is -1°-1°. In addition, "perpendicular" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is 89°-91°. Equal distance, equal angle or equal area refers to a state in which the tolerance range is -1%-1%.

[0042] The utility model provides a kind of battery pack, including box and following battery, battery pack can store a large amount of electric energy by following battery, and can provide power for electric vehicle, electric motorcycle, electric tool and the like equipment;And since battery pack uses following battery, therefore, battery pack also has the advantages of following battery, and the present application does not make too much repetition.

[0043] As Figures 1 to 2 As shown in the preferred embodiment of the utility model, a battery has a first direction Z and a second direction X perpendicular to each other, and the battery includes a shell 1, a top cover 101, a first pole 2, a second pole 3, and a first explosion-proof valve 4. The top cover 101 is connected to the shell 1 along the first direction Z, and the top cover 101 is provided with a liquid injection hole 1011 penetrating along the first direction Z. The first pole 2 and the second pole 3 are arranged in the top cover 101, and the second pole 3 is arranged apart from the first pole 2 along the second direction X. The liquid injection hole 1011 is located between the first pole 2 and the second pole 3 along the second direction X. The first explosion-proof valve 4 is connected to the top cover 101 and located on the side of the first pole 2 away from the second pole 3 along the second direction X.

[0044] In the above-mentioned battery, the liquid injection hole 1011 is located between the first pole 2 and the second pole 3, and the first explosion-proof valve 4 is arranged on the side of the first pole 2 away from the second pole 3. The first explosion-proof valve 4 and the liquid injection hole 1011 are separated by the first pole 2. Therefore, the distance between the liquid injection hole 1011 and the explosion-proof valve is relatively far, and the risk of electrolyte invading the explosion-proof valve during liquid injection of the battery is relatively small, which is beneficial to ensure the production quality of the battery.

[0045] Further, as Figure 1 and Figure 2As shown, the battery further comprises a second explosion-proof valve 5 connected to the top cover 101 and located on the side of the second pole 3 away from the first pole 2 in the second direction X, that is, the top cover 101 is provided with explosion-proof structures at both ends in the second direction X, based on which, when a large amount of gas is generated inside the battery due to various abnormal conditions (such as overcharging, short circuit, etc.) and the pressure rises, the first explosion-proof valve 4 and the second explosion-proof valve 5 can simultaneously release the pressure from both ends of the top cover 101 in the second direction X, so that the pressure can be released more uniformly, reducing the damage to the battery structure caused by excessive local stress, and through the pressure relief of the first explosion-proof valve 4 and the second explosion-proof valve 5, the pressure relief position is not in the same place, which can reduce the accumulation of splashes and reduce the risk of fire.

[0046] In the present embodiment, along the first direction Z, the top cover 101 is provided with a through mounting hole 1012, and the first explosion-proof valve 4 covers and seals the mounting hole 1012, the first explosion-proof valve 4 and the top cover 101 are both independent components, and the structure is relatively simple, which can be processed separately and has relatively low production difficulty.

[0047] Further, the first explosion-proof valve 4 comprises a valve body 41 and a first notch 42, the valve body 41 is connected with the top cover 101 and seals the mounting hole 1012, the shell 1 has a bottom wall 12 opposite to the top cover 101 in the first direction Z, the first notch 42 is arranged on the side of the valve body 41 away from the bottom wall 12, and the first notch 42 is recessed in the direction of approaching the bottom wall 12 along the first direction Z.

[0048] Among them, the valve body 41 is in the form of a sheet, based on the first notch 42, the thickness of the valve body 41 at the first notch 42 is relatively thin, and this part is relatively fragile, when a large amount of gas is generated inside the battery due to various abnormal conditions (such as overcharging, short circuit, etc.) and the pressure rises, the pressure will first break through at the first notch 42, causing the valve body 41 to crack along the first notch 42, forming an exhaust passage, and timely releasing the high-pressure gas inside the battery, avoiding the explosion of the battery due to the excessive internal pressure, thereby ensuring the safety of the battery and the surrounding environment; as one of the embodiments of the present application, as shown in Figure 2 and Figure 3 As shown, the projection of the circumferential hole wall of the mounting hole 1012 is an oval shape, at this time, the outer edge of the valve body 41 is in the form of an oval, the valve body 41 is arranged in the mounting hole 1012, and the first notch 42 is in the form of an arc.

[0049] And in other embodiments, as shown in Figure 4 and Figure 5 As shown, the projection of the circumferential hole wall of the mounting hole 1012 is a circular shape, at this time, the outer edge of the valve body 41 is in the form of a circle, the valve body 41 is arranged in the mounting hole 1012, and the first notch 42 is in the form of an arc, the first explosion-proof valve 4 of this structure has a more uniform stress distribution and better anti-deformation ability, and has a more stable burst value.

[0050] In other embodiments, the projection of the circumferential hole wall of the mounting hole 1012 is a polygon, for example, Figure 6 and Figure 7 As shown, the projection of the circumferential hole wall of the mounting hole 1012 is a rectangle, at this time, the outer edge of the valve body 41 is rectangular, the valve body 41 is arranged in the mounting hole 1012, and the first notch 42 is formed by a plurality of straight lines connected in sequence to form a surrounding structure with an opening. The advantage of such a structure of the first explosion-proof valve 4 is that it has a larger pressure relief area under the same length-width condition.

[0051] In the present embodiment, as shown in Figure 1 and Figure 2 The first explosion-proof valve 4 and the second explosion-proof valve 5 are the same structure, and the second pole 3 also has a mounting hole 1012 on the side away from the first pole 2 in the second direction X, and the second explosion-proof valve 5 covers the mounting hole 1012; of course, in other embodiments, the structures of the first explosion-proof valve 4 and the second explosion-proof valve 5 can be different, and the present application does not limit this.

[0052] In the present embodiment, the battery further comprises a third explosion-proof valve 6, and the third explosion-proof valve 6 is arranged on the shell 1; the third explosion-proof valve 6 has a thinned area 601, and the third explosion-proof valve 6 is integrally formed with the shell 1; a second notch 602 is arranged on the side of the thinned area 601 away from the inside of the shell 1, the second notch 602 is arranged in the thinned area 601, and the second notch 602 is recessed towards the inside of the shell 1; similarly, the second notch 602 makes the structure at the corresponding position in the thinned area 601 weak, when the gas in the battery increases and the pressure rises, the pressure will first break at the second notch 602, causing the weak area to crack along the second notch 602, forming an exhaust passage, and timely releasing the high-pressure gas in the battery.

[0053] The depth of the second notch 602 in the first direction Z is not greater than the depth of the first notch 42 in the first direction Z, and in the present embodiment, the depth of the second notch 602 in the first direction Z is the same as the depth of the first notch 42 in the first direction Z. Since the battery is provided with the first explosion-proof valve 4, the second explosion-proof valve 5 and the third explosion-proof valve 6, the battery has a larger pressure relief area, and the first explosion-proof valve 4, the second explosion-proof valve 5 and the third explosion-proof valve 6 work simultaneously, which can discharge gas more quickly, timely reduce the internal pressure of the battery, and effectively avoid dangerous situations such as explosion caused by excessive pressure.

[0054] In addition, the third explosion-proof valve 6 is integrally formed with the shell 1, which has the advantages of reducing the connection link between the explosion-proof valve and the shell 1, not needing additional sealing measures to ensure the sealing between the two, not having the problem of aging of sealing materials, making the overall structure of the battery more compact, having better sealing, and being able to better resist external forces in the face of external impact, vibration and the like.

[0055] In other embodiments, the depth of the second score 602 (referring to the depth of the second score 602 recessed in the direction close to the inside of the shell 1, perpendicular to the inward direction of the paper Figure 13 ) can be less than the depth of the first score 42 (referring to the depth of the first score 42 along the direction close to the shell in the first direction Z), which can facilitate the first explosion-proof valve 4 to preferentially discharge gas, and then discharge from the third explosion-proof valve 6. The gas is preferentially discharged from the top, which does not affect the adjacent battery. In this embodiment, the depth of the score of the second explosion-proof valve 5 can be the same as the depth of the first score 42. Figure 1

[0056] In the present application, the shell 1 includes a bottom wall 12 and a side wall 13, and the two ends of the side wall 13 along the first direction Z are respectively connected with the top cover 101 and the bottom wall 12; the third explosion-proof valve 6 is arranged on the bottom wall 12 or the side wall 13; for example, as shown in Figure 8 , the third explosion-proof valve 6 is arranged on the bottom wall 12, or, as shown in Figure 10 , the third explosion-proof valve 6 is arranged on the side wall 13, and the present application does not limit this, and the arrangement position of the third explosion-proof valve 6 is arranged according to the actual application.

[0057] In the present application, the third explosion-proof valve 6 is arranged on the bottom wall 12, and a through explosion-proof hole is arranged on the bottom wall 12 along the first direction Z, and the circumferential hole wall of the explosion-proof hole is projected as a rectangle on the plane of the bottom wall 12 along the first direction Z.

[0058] Since the shape of the third explosion-proof valve 6 matches the shape of the explosion-proof hole, the edge of the thinning area 601 is rectangular, and of course can also be other polygons, circles or ellipses, such as Figure 8 and Figure 10 , the edge of the thinning area 601 is elliptical, at this time, the second score 602 is arc-shaped, such as Figure 9 , the edge of the thinning area 601 is circular, at this time, the second score 602 is arc-shaped; such as Figure 11 , the edge of the thinning area 601 is circular, at this time, the second score 602 is strip-shaped and the number of the second score 602 is multiple, the multiple second scores 602 intersect at a point, the second score 602 is a straight line shape, the processing difficulty is lower, the processability is better, and the quality is more stable, and the multiple second scores 602 form a symmetrical structure, the consistency of the burst value of the third explosion-proof valve 6 is better, and has better anti-deformation ability for the gas production in the battery; such as Figure 12 ​As shown, the edge of the thinning area 601 is rectangular, at this time, the second score line 602 is strip-shaped and the number thereof is two, the two second score lines 602 are arranged in intersection, the second score line 602 is linear in shape, the processing difficulty is lower, the processability is better, and the quality is more stable, and the two second score lines 602 constitute a symmetrical structure, the third explosion valve 6 has better consistency of explosion value, and has better anti-deformation ability for the gas production in the battery.

[0059] In addition, for the structure of the second score line 602, taking the edge of the thinning area 601 as an example, in some embodiments, as shown in Figure 13 As shown, the second score line 602 includes a first sub-score line 6021 and a second sub-score line 6022, the first sub-score line 6021 and the second sub-score line 6022 are strip-shaped, and the first sub-score line 6021 and the second sub-score line 6022 intersect.

[0060] The first sub-score line 6021 and the second sub-score line 6022 are both linear in shape, the processing difficulty is lower, the processability is better, and the quality is more stable, and the first sub-score line 6021 and the second sub-score line 6022 constitute a symmetrical structure, for example, the first sub-score line 6021 and the second sub-score line 6022 intersect to form a king-shaped, rice-shaped, or X-shaped. Compared with Figure 8 the non-intersecting shape, the first sub-score line 6021 and the second sub-score line 6022 intersect, the third explosion valve 6 has better consistency of explosion value, and has better anti-deformation ability for the gas production in the battery; in addition, the second score line 602 with this structure is also applicable to the above-mentioned thinning area 601 with other shapes, and the present application will not be described in detail.

[0061] Specifically, the number of the first sub-score line 6021 is three, the three first sub-score lines 6021 are arranged in parallel and at intervals, the number of the second sub-score line 6022 is one, the second sub-score line 6022 extends along the arrangement direction of the three first sub-score lines 6021, and the second sub-score line 6022 is connected with the three first sub-score lines 6021, the second sub-score line 6022 is perpendicular to the first sub-score line 6021, the second score line 602 with this structure, the first sub-score line 6021 and the second sub-score line 6022 are both linear in shape, the processing difficulty is lower, the processability is better, and the quality is more stable, and the first sub-score line 6021 and the second sub-score line 6022 constitute a symmetrical structure, the third explosion valve 6 has better consistency of explosion value, and has better anti-deformation ability for the gas production in the battery; in addition, the second score line 602 with this structure is also applicable to the above-mentioned thinning area 601 with other shapes, and the present application will not be described in detail.

[0062] In some embodiments, as shown in Figure 14As shown in the drawings, the second score line 602 comprises a plurality of third sub-score lines 6023 and at least one fourth sub-score line 6024, the third sub-score lines 6023 and the fourth sub-score line 6024 are in strip shape, the plurality of third sub-score lines 6023 are sequentially connected to form a surrounding structure with the gap 100, and the fourth sub-score line 6024 is arranged at the gap 100 and is spaced apart from the third sub-score line 6023.

[0063] Similarly, the second score line 602 with the structure has the advantages of good blasting performance relative to the second score line 602 in the prior art. Figure 8

[0064] In the utility model, as shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the battery further comprises a protective film 7, the protective film 7 is connected to one side of the top cover 101 away from the bottom wall 12 and covers the mounting hole 1012, the protective film 7 protects the first explosion-proof valve 4 and the second explosion-proof valve 5, and foreign matters are prevented from entering the mounting hole 1012.

[0065] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the art, without departing from the technical principles of the utility model, a plurality of improvements and replacements can be made, and the improvements and replacements should be regarded as the protection range of the utility model.​

Claims

1. A battery having a first direction (Z) and a second direction (X) intersecting, characterized in that, The battery comprises: a shell (1), a top cover (101) connected with the shell (1) along the first direction (Z), the top cover (101) being provided with a liquid injection hole (1011) penetrating along the first direction (Z); a first pole column (2) penetrating the top cover (101); a second pole column (3) penetrating the top cover (101) and being arranged apart from the first pole column (2) along the second direction (X), the liquid injection hole (1011) being located between the first pole column (2) and the second pole column (3) along the second direction (X); a first explosion-proof valve (4) connected with the top cover (101) and located on a side of the first pole column (2) away from the second pole column (3) along the second direction (X).

2. The battery of claim 1, wherein, The battery further comprises a second explosion-proof valve (5) connected with the top cover (101) and located on a side of the second pole column (3) away from the first pole column (2) along the second direction (X).

3. The battery of claim 1, wherein, The first explosion-proof valve (4) comprises a valve body (41) and a first notch (42), the valve body (41) is connected with the top cover (101), the shell (1) has a bottom wall (12) arranged opposite to the top cover (101) along the first direction (Z), the first notch (42) is arranged on a side of the valve body (41) away from the bottom wall (12), and the first notch (42) is recessed in a direction close to the bottom wall (12) along the first direction (Z).

4. The battery of claim 3, wherein, Along the first direction (Z), the top cover (101) is provided with a mounting hole (1012) penetrating therethrough, a projection of a circumferential hole wall of the mounting hole (1012) is a polygon, and the valve body (41) covers the mounting hole (1012).

5. The battery of claim 3, wherein, The battery further comprises a third explosion-proof valve (6) arranged on the shell (1); the third explosion-proof valve (6) has a thinned region (601), the third explosion-proof valve (6) is integrally formed with the shell (1), a second notch (602) is arranged on a side of the thinned region (601) away from an inside of the shell (1), the second notch (602) is arranged in the thinned region (601), the second notch (602) is recessed in a direction close to the inside of the shell (1), and a depth of the second notch (602) along the first direction (Z) is not greater than a depth of the first notch (42) along the first direction (Z).

6. The battery of claim 5, wherein, The shell (1) comprises a bottom wall (12) and a side wall (13), two ends of the side wall (13) along the first direction (Z) are connected with the top cover (101) and the bottom wall (12), respectively. The third explosion-proof valve (6) is arranged on the bottom wall (12) or the side wall (13).

7. The battery of claim 6, wherein, The third explosion-proof valve (6) is arranged on the bottom wall (12), and an explosion-proof hole penetrating the bottom wall (12) along the first direction (Z) is arranged, a circumferential hole wall of the explosion-proof hole is projected as a rectangle on a plane where the bottom wall (12) is located along the first direction (Z).

8. The battery of claim 5, wherein, The second score line (602) comprises a first sub-score line (6021) and a second sub-score line (6022), the first sub-score line (6021) and the second sub-score line (6022) are in strip shape, and the first sub-score line (6021) and the second sub-score line (6022) intersect.

9. The battery of claim 5, wherein, The second score line (602) comprises a plurality of third sub-score lines (6023) and at least one fourth sub-score line (6024), the third sub-score line (6023) and the fourth sub-score line (6024) are in strip shape, a plurality of the third sub-score lines (6023) are sequentially connected to form a surrounding structure with a gap (100), and the fourth sub-score line (6024) is arranged at the gap (100) and is spaced apart from the third sub-score line (6023).

10. A battery pack, characterized by, The battery comprises a box body and the battery as claimed in any one of claims 1-9.

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