Battery cell and battery pack

Abstract

The utility model relates to battery technology field discloses a kind of battery monomer and battery package, battery monomer includes lower plastic part, pin and top cover sheet, lower plastic part is equipped with pole hole, lower plastic part has oppositely arranged first surface and second surface, first surface is equipped with first positioning member, second surface is equipped with second positioning member;Pin is connected to first surface, pin is equipped with first through-hole and first positioning hole with interval, first through-hole is oppositely arranged with pole hole and is communicated, first positioning member is inserted in first positioning hole;Top cover sheet is connected to second surface, top cover sheet is equipped with second through-hole and second positioning hole with interval, second through-hole is oppositely arranged with pole hole and is communicated, second positioning member is inserted in second positioning hole.The utility model is equipped with positioning structure between lower plastic part and top cover sheet, pin, realize the positioning of two sides of lower plastic part, improve the positioning accuracy of lower plastic part between top cover sheet and pin, avoid the rotation deflection when lower plastic part assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cell and battery pack. Background Technology

[0002] In the battery top cover assembly, the lower plastic component is positioned between the top cover plate and the leads, insulating the battery cell from the top cover plate to prevent short circuits. The positioning accuracy of the lower plastic component directly affects its insulation effect on the top cover plate and the battery cell. Currently, a positioning structure is usually set between the lower plastic component and the top cover plate. However, existing technology uses a positioning post and positioning hole to position the lower plastic component, which makes it prone to rotation and misalignment when assembled onto the top cover plate, resulting in inaccurate positioning of the lower plastic component. Utility Model Content

[0003] The purpose of this invention is to provide a battery cell and battery pack for accurate positioning of the lower plastic parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: One aspect of this utility model is to provide a battery cell, comprising: The lower plastic part has an electrode hole. The lower plastic part has a first surface and a second surface that are arranged opposite to each other. A first positioning element is provided on the first surface, and a second positioning element is provided on the second surface. A pin is connected to the first surface. The pin is provided with a first through hole and a first positioning hole at intervals. The first through hole is disposed opposite to and communicates with the pole hole. The first positioning member is inserted into the first positioning hole. A top cover plate is connected to the second surface. The top cover plate is provided with a second through hole and a second positioning hole at intervals. The second through hole is arranged opposite to and communicates with the pole hole. The second positioning member is inserted into the second positioning hole.

[0005] In some embodiments, the first surface is further provided with a first limiting member, the first limiting member being spaced apart from the first positioning member, and the pin being provided with a clearance portion adapted to the first limiting member.

[0006] In some embodiments, the first limiting member includes a first limiting portion, a bent portion, and a second limiting portion connected in sequence, wherein the first limiting portion and the second limiting portion are located on the same side of the bent portion.

[0007] In some embodiments, the pin includes a first connecting portion and a second connecting portion that are connected to each other, the first connecting portion being connected to the first surface, and the first through hole and the first positioning hole being disposed on the first connecting portion; The battery cell has a first direction and a second direction that are perpendicular to each other. The first surface has a length side and a width side. The length side extends along the first direction and the width side extends along the second direction. The lower plastic part is further provided with a first extension section and a second extension section that are perpendicular to each other. The first extension section is connected to the width side of the first surface, and the second extension section is connected to the length side of the first surface. The first limiting member is connected to the second extension section, and the first extension section, the second extension section and the first limiting member surround to form a limiting groove. One end of the second connecting part connected to the first connecting part is located in the limiting groove.

[0008] In some embodiments, the first extension is further provided with a second limiting member, the second limiting member being spaced apart from the first surface to form a limiting cavity, and the first connecting portion being at least partially located within the limiting cavity.

[0009] In some embodiments, the battery cell has a first orientation, and the second extension is provided with a clearance opening on the side away from the first surface. In the first orientation, the clearance opening is located close to the terminal hole.

[0010] In some embodiments, the battery cell has a first direction and a second direction that are perpendicular to each other, and the first surface is provided with a first region, a second region and a third region in sequence along the first direction, and the electrode hole is provided in the second region; The first surface is also provided with a plurality of reinforcing members, some of which extend along the first direction and are provided in the first region; some of which extend along the second direction and are provided in the first region; some of which are provided along the circumference of the pole hole and are provided in the second region; and some of which are provided in the third region.

[0011] In some embodiments, a weight-reducing hole is provided at one end of the lower plastic part away from the pole hole, and the weight-reducing hole is provided through the first surface and the second surface.

[0012] In some embodiments, the battery cell has a first direction, and the top cover is provided with an explosion-proof valve and a liquid injection hole; multiple lower plastic parts are provided, including a first lower plastic part and a second lower plastic part, the first lower plastic part and the second lower plastic part are respectively connected to the two ends of the top cover in the first direction, and in the first direction, the lower plastic parts are spaced apart from the explosion-proof valve and the liquid injection hole.

[0013] Another aspect of this invention is to provide a battery pack comprising the battery cells as described above.

[0014] Compared with the prior art, the advantages of this utility model embodiment of a battery cell and battery pack are as follows: In this embodiment of the battery cell, a first positioning member is provided on the first surface of the lower plastic part, and a first positioning hole is provided on the lead. The positioning connection between the lower plastic part and the lead is achieved through the cooperation of the first positioning member and the first positioning hole. A second positioning member is provided on the second surface of the lower plastic part, and a second positioning hole is provided on the top cover plate. The positioning connection between the lower plastic part and the top cover plate is achieved through the cooperation of the second positioning member and the second positioning hole. Therefore, this application provides positioning structures between the lower plastic part and the top cover plate and the lead, realizing positioning of both sides of the lower plastic part, improving the positioning accuracy of the lower plastic part between the top cover plate and the lead, and avoiding rotational deviation during the assembly of the lower plastic part. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a single battery cell according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the top cover assembly in an embodiment of this utility model; Figure 3 This is an exploded view of the top cover assembly in an embodiment of this utility model; Figure 4 This is a partial view of the top cover assembly in an embodiment of this utility model from a bottom-view perspective; Figure 5 This is a schematic diagram of the lower plastic part from one perspective in an embodiment of this utility model; Figure 6 This is a schematic diagram of the lower plastic part from another perspective in an embodiment of this utility model; Figure 7 This is a schematic diagram of the pins in an embodiment of this utility model; Figure 8 This is a schematic diagram of the top cover sheet in an embodiment of this utility model.

[0016] Numbering on the map: 1. Top cover assembly; 2. Outer shell; 10. Lower plastic part; 1001. First lower plastic part; 1002. Second lower plastic part; 101. Pole post hole; 102. First surface; 1021. First area; 1022. Second area; 1023. Third area; 1024. Width side; 1025. Length side; 103. Second surface; 11. First positioning element; 12. Second positioning element; 13. First limiting element; 131. First limiting part; 132. Bending part; 133. Second limiting part; 14. First extension section; 141. Two limiting components, 142, limiting cavity, 15, second extension section, 151, clearance opening, 16, limiting groove, 17, reinforcing component, 18, weight reduction hole, 20, pin, 21, first connecting part, 211, first through hole, 212, first positioning hole, 213, clearance part, 22, second connecting part, 30, top cover plate, 301, second through hole, 302, second positioning hole, 303, explosion-proof valve, 304, liquid injection hole, 40, upper plastic part, 50, pole post, 60, riveting block, X, first direction, Y, second direction, Z, third direction. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] See Figure 1This utility model embodiment provides a battery cell including a top cover assembly 1 and a housing 2. One end of the housing 2 is open, and the top cover assembly 1 covers the opening and is connected to the housing 2. See Figures 2-4 As shown, each battery cell has two mutually perpendicular directions: a first direction X, a second direction Y, and a third direction Z. The top cover assembly 1 includes a lower plastic part 10, leads 20, and a top cover sheet 30. The lower plastic part 10 has terminal hole 101 for inserting a terminal 50. The lower plastic part 10 has a first surface 102 and a second surface 103 oppositely arranged along the third direction Z. A first positioning element 11 is provided on the first surface 102, and a second positioning element 12 is provided on the second surface 103. The leads 20 are connected to the first surface 102, and the leads 20 are spaced apart by first through holes 2. The first positioning member 11 is inserted into the first positioning hole 212 and the first through hole 211 is opposite to and connected to the pole post hole 101. The top cover plate 30 is connected to the second surface 103. The top cover plate 30 is provided with a second through hole 301 and a second positioning hole 302 at intervals. The second through hole 301 is opposite to and connected to the pole post hole 101. The second positioning member 12 is inserted into the second positioning hole 302. The pole post 50 is inserted into the first through hole 211, the pole post hole 101 and the second through hole 301.

[0021] A first positioning element 11 is provided on the first surface 102 of the lower plastic part 10, and a first positioning hole 212 is provided on the pin 20. The positioning connection between the lower plastic part 10 and the pin 20 is achieved through the cooperation of the first positioning element 11 and the first positioning hole 212. A second positioning element 12 is provided on the second surface 103 of the lower plastic part 10, and a second positioning hole 302 is provided on the top cover plate 30. The positioning connection between the lower plastic part 10 and the top cover plate 30 is achieved through the cooperation of the second positioning element 12 and the second positioning hole 302. Therefore, this application provides positioning structures between the lower plastic part 10 and the top cover plate 30 and the pin 20, so as to achieve positioning of both sides of the lower plastic part 10, improve the positioning accuracy of the lower plastic part 10 between the top cover plate 30 and the pin 20, and avoid rotational deviation of the lower plastic part 10 during assembly.

[0022] The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other. The first direction X is the length direction of the top cover 30, the second direction Y is the width direction of the top cover 30, and the third direction Z is the thickness direction of the top cover 30. The lower plastic part 10 extends along the first direction X in its length direction, along the second direction Y in its width direction, and along the third direction Z in its thickness direction.

[0023] participate Figures 4-7As shown, in some embodiments, the first surface 102 is further provided with a first limiting member 13, which is spaced apart from the first positioning member 11. The pin 20 is provided with a clearance portion 213 adapted to the first limiting member 13. The clearance portion 213 is provided to prevent the first limiting member 13 from interfering with the installation of the pin 20, and the cooperation between the clearance portion 213 and the first limiting member 13 can further improve the positioning effect of the pin 20 on the lower plastic part 10. The clearance portion 213 has a groove-shaped structure adapted to the first limiting member 13.

[0024] See Figure 6 As shown, in some embodiments, the first surface 102 has a length side 1025 and a width side 1024. The length side 1025 extends along a first direction X, and the width side 1024 extends along a second direction Y. The first limiting member 13 includes a first limiting portion 131, a bending portion 132, and a second limiting portion 133 connected in sequence. The first limiting portion 131 and the second limiting portion 133 are located on the same side of the bending portion 132. One end of the first limiting portion 131 away from the bending portion 132 extends to the length side 1025 of the first surface 102, and one end of the second limiting portion 133 away from the bending portion 132 extends to the length side 1025 of the first surface 102, which facilitates the processing and forming of the first limiting member 13. Moreover, the clearance portion 213 is generally V-shaped, and the inner walls of the two side grooves are respectively attached to the first limiting portion 131 and the second limiting portion 133, which facilitates the processing and forming of the clearance portion 213. The first limiting part 131, the bending part 132, and the second limiting part 133 are integrally formed, and the bending part 132 is arc-shaped.

[0025] See Figure 4 and Figure 7 As shown, in some embodiments, the pin 20 includes a first connecting portion 21 and a second connecting portion 22 that are connected to each other. The first connecting portion 21 is connected to the first surface 102, and the first through hole 211 and the first positioning hole 212 are both provided in the first connecting portion 21. The second connecting portion 22 is used to connect the winding core.

[0026] See Figure 5 and Figure 6As shown, the lower plastic part 10 also has a first extension segment 14 and a second extension segment 15 that are perpendicular to each other. The first extension segment 14 is connected to the width side 1024 of the first surface 102, and the second extension segment 15 is connected to the length side 1025 of the first surface 102. The first limiting member 13 is connected to the second extension segment 15. The first extension segment 14, the second extension segment 15, and the first limiting member 13 form a limiting groove 16. One end of the second connecting part 22 connected to the first connecting part 21 is located in the limiting groove 16. The limiting groove 16 limits the second connecting part 22, which facilitates the positioning and installation of the pin 20. Moreover, the first limiting member 13 forms part of the limiting groove 16. The first limiting member 13 cooperates with the clearance part 213, and the limiting groove 16 cooperates with the second connecting part 22, which improves the positioning accuracy of the pin 20.

[0027] See Figure 5 and Figure 6 As shown, in some embodiments, the first extension segment 14 and the second extension segment 15 are connected to each other, and the connection between the first extension segment 14 and the second extension segment 15 is a rounded transition. The lower plastic part 10 is generally rectangular, and each of the two oppositely arranged width sides 1024 of the lower plastic part 10 is provided with a first extension segment 14, and each of the two oppositely arranged length sides 1025 is provided with a second extension segment 15. The first extension segment 14 and the second extension segment 15 can also serve to protect the first connecting portion 21.

[0028] See Figure 5 and Figure 6 As shown, in some embodiments, the first extension 14 is further provided with a second limiting member 141. The second limiting member 141 is spaced apart from the first surface 102 to form a limiting cavity 142, and the first connecting portion 21 is at least partially located within the limiting cavity 142. The limiting cavity 142 limits the first connecting portion 21. The second limiting member 141 is elongated and extends along the second direction Y. The side of the second limiting member 141 facing away from the first surface 102 is inclined from the first extension 14 toward the first surface 102.

[0029] See Figure 5 and Figure 6 As shown, in some embodiments, the second extension 15 has a clearance opening 151 on the side away from the first surface 102, and in the first direction X, the clearance opening 151 is located close to the electrode hole 101. The electrode tab is avoided by the clearance opening 151.

[0030] See Figure 6As shown, in some embodiments, the first surface 102 is provided with a first region 1021, a second region 1022, and a third region 1023 sequentially along a first direction X, and the pole hole 101 is provided in the second region 1022; the first surface 102 is also provided with a plurality of reinforcing members 17, some of which extend along the first direction X and are provided in the first region 1021; some of which extend along the second direction Y and are provided in the first region 1021; some of which are provided along the circumference of the pole hole 101 in the second region 1022; and some of which are provided in the third region 1023. The structural strength of the lower plastic part 10 is improved by the reinforcing members 17. Optionally, the reinforcing members 17 may be provided only on the outer periphery of the pole hole 101 to compensate for the strength reduction caused by the opening of the pole hole 101. When the reinforcing members 17 are provided on the outer periphery of the pole hole 101, the side of the reinforcing members 17 near the pole hole 101 is arc-shaped to match the contour of the pole hole 101.

[0031] Within the first region 1021, reinforcing members 17 extending along the first direction X and reinforcing members 17 extending along the second direction Y may be arranged intersectingly to improve the reinforcing effect. Within the third region 1023, the reinforcing members 17 may be block-shaped.

[0032] See Figure 5 and Figure 6 As shown, in some embodiments, a weight-reduction hole 18 is provided at the end of the lower plastic part 10 away from the terminal hole 101, and the weight-reduction hole 18 is disposed through the first surface 102 and the second surface 103. The weight-reduction hole 18 reduces the weight of the lower plastic part 10, thereby facilitating the lightweight design of the battery cell. One or more weight-reduction holes 18 may be provided, and the location of the weight-reduction hole 18 does not interfere with the location of the terminal hole 101, the first positioning member 11, and the second positioning member 12.

[0033] See Figure 8 As shown, in some embodiments, the top cover plate 30 is provided with an explosion-proof valve 303 and an injection hole 304. The explosion-proof valve 303 is used to release pressure when the internal pressure of the battery cell exceeds the tolerance limit to avoid an explosion accident; the injection hole 304 is used to inject electrolyte into the battery cell.

[0034] See Figure 2 , Figure 3 and Figure 8As shown, multiple lower plastic parts 10 are provided, including a first lower plastic part 1001 and a second lower plastic part 1002. The first lower plastic part 1001 and the second lower plastic part 1002 are respectively connected to the two ends of the top cover plate 30 in the first direction X. In the first direction X, the lower plastic parts 10, the explosion-proof valve 303, and the liquid injection hole 304 are all spaced apart. The structures of the first lower plastic part 1001 and the second lower plastic part 1002 are roughly the same. The positions of the first lower plastic part 1001 and the second lower plastic part 1002 are adapted to the position of the second through hole 301 on the top cover plate 30. The top cover plate 30 has second through holes 301 at both ends in the first direction X. The second through holes 301 are used to pass through the electrode post 50. A first lower plastic part 1001 is provided at the corresponding position of one of the second through holes 301, and a second lower plastic part 1002 is provided at the corresponding position of the other second through hole 301. Both the first lower plastic part 1001 and the second lower plastic part 1002 have electrode post holes 101 to pass through the electrode post 50. The first lower plastic part 1001 and the second lower plastic part 1002 are respectively connected to the pins 20. In other embodiments, the lower plastic part 10 can also adopt an integral structure, and the lower plastic part 10 extends from one end of the top cover plate 30 to the other end of the top cover plate 30 along the first direction X. When the lower plastic part 10 is an integral structure, the lower plastic part 10 has clearance holes corresponding to the explosion-proof valve 303 and the injection hole 304 respectively.

[0035] In some embodiments, the second positioning hole 302 can be a blind hole, located on the side of the top cover 30 facing the second surface 103. Multiple second positioning members 12 and multiple second positioning holes 302 can be provided, with each of the multiple second positioning holes 302 corresponding to a multiple positioning member 12.

[0036] See Figure 2 and Figure 3 As shown, in some embodiments, the battery cell further includes an upper plastic part 40 and a riveting block 60. The riveting block 60 is connected to one end of the terminal post 50 that protrudes from the terminal post hole 101. The riveting block 60 is welded and fixed to the terminal post 50. The riveting block 60 increases the end area of ​​the terminal post 50, facilitating its connection with an external cable. The upper plastic part 40 is sleeved on the terminal post 50 and is located between the riveting block 60 and the top cover plate 30, ensuring insulation between the riveting block 60 and the top cover plate 30. There are two terminal post holes 101, and a terminal post 50 passes through each terminal post hole 101. Correspondingly, there are two riveting blocks 60 and two upper plastic parts 40.

[0037] This utility model also provides a battery pack, including the battery cells as described above.

[0038] In summary, this utility model provides a battery cell and a battery pack. A first positioning member 11 is provided on the first surface 102 of the lower plastic part 10, and a first positioning hole 212 is provided on the lead 20. The positioning connection between the lower plastic part 10 and the lead 20 is achieved through the cooperation of the first positioning member 11 and the first positioning hole 212. A second positioning member 12 is provided on the second surface 103 of the lower plastic part 10, and a second positioning hole 302 is provided on the top cover plate 30. The positioning connection between the lower plastic part 10 and the top cover plate 30 is achieved through the cooperation of the second positioning member 12 and the second positioning hole 302. Therefore, this application provides positioning structures between the lower plastic part 10 and the top cover plate 30, as well as the lead 20, to achieve positioning of both sides of the lower plastic part 10, improving the positioning accuracy of the lower plastic part 10 between the top cover plate 30 and the lead 20, and preventing rotational misalignment of the lower plastic part 10 during assembly.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery cell, characterized in that, include: The lower plastic part (10) has an electrode hole (101). The lower plastic part (10) has a first surface (102) and a second surface (103) arranged opposite to each other. A first positioning element (11) is provided on the first surface (102), and a second positioning element (12) is provided on the second surface (103). Pin (20) is connected to the first surface (102). The pin (20) is provided with a first through hole (211) and a first positioning hole (212) at intervals. The first through hole (211) is arranged opposite to and communicates with the pole hole (101). The first positioning member (11) is inserted into the first positioning hole (212). The top cover plate (30) is connected to the second surface (103). The top cover plate (30) is provided with a second through hole (301) and a second positioning hole (302) at intervals. The second through hole (301) is arranged opposite to and communicates with the pole hole (101). The second positioning member (12) is inserted into the second positioning hole (302).

2. The battery cell according to claim 1, characterized in that, The first surface (102) is also provided with a first limiting member (13), the first limiting member (13) and the first positioning member (11) are spaced apart, and the pin (20) is provided with a clearance part (213) adapted to the first limiting member (13).

3. The battery cell according to claim 2, characterized in that, The first limiting member (13) includes a first limiting part (131), a bending part (132), and a second limiting part (133) connected in sequence. The first limiting part (131) and the second limiting part (133) are located on the same side of the bending part (132).

4. The battery cell according to claim 2, characterized in that, The pin (20) includes a first connecting part (21) and a second connecting part (22) that are connected to each other. The first connecting part (21) is connected to the first surface (102). The first through hole (211) and the first positioning hole (212) are both provided in the first connecting part (21). The battery cell has a first direction (X) and a second direction (Y) that are perpendicular to each other. The first surface (102) has a length side (1025) and a width side (1024). The length side (1025) extends along the first direction (X), and the width side (1024) extends along the second direction (Y). The lower plastic part (10) is further provided with a first extension section (14) and a second extension section (15) that are perpendicular to each other. The first extension section (14) is connected to the width side (1024) of the first surface (102), and the second extension section (15) is connected to the length side (1025) of the first surface (102). The first limiting member (13) is connected to the second extension section (15), and the first extension section (14), the second extension section (15) and the first limiting member (13) surround to form a limiting groove (16). One end of the second connecting part (22) connected to the first connecting part (21) is located in the limiting groove (16).

5. The battery cell according to claim 4, characterized in that, The first extension section (14) is also provided with a second limiting member (141), the second limiting member (141) and the first surface (102) are spaced apart to form a limiting cavity (142), and the first connecting part (21) is at least partially located in the limiting cavity (142).

6. The battery cell according to claim 4, characterized in that, The battery cell has a first direction (X), and the second extension (15) has a clearance opening (151) on the side away from the first surface (102). In the first direction (X), the clearance opening (151) is located close to the pole hole (101).

7. The battery cell according to claim 1, characterized in that, The battery cell has a first direction (X) and a second direction (Y) that are perpendicular to each other. The first surface (102) is provided with a first region (1021), a second region (1022) and a third region (1023) in sequence along the first direction (X). The electrode hole (101) is located in the second region (1022). The first surface (102) is also provided with a plurality of reinforcing members (17), some of which extend along the first direction (X) and are provided in the first region (1021); some of which extend along the second direction (Y) and are provided in the first region (1021); some of which are provided along the circumference of the pole hole (101) in the second region (1022); and some of which are provided in the third region (1023).

8. The battery cell according to claim 1, characterized in that, A weight-reducing hole (18) is provided at one end of the lower plastic part (10) away from the pole hole (101), and the weight-reducing hole (18) is provided through the first surface (102) and the second surface (103).

9. The battery cell according to claim 1, characterized in that, The battery cell has a first direction (X), and the top cover (30) is provided with an explosion-proof valve (303) and a liquid injection hole (304); multiple lower plastic parts (10) are provided, and the multiple lower plastic parts (10) include a first lower plastic part (1001) and a second lower plastic part (1002). The first lower plastic part (1001) and the second lower plastic part (1002) are respectively connected to the two ends of the top cover (30) in the first direction (X), and in the first direction (X), the lower plastic parts (10), the explosion-proof valve (303), and the liquid injection hole (304) are all spaced apart.

10. A battery pack, characterized in that, Includes the battery cell as described in any one of claims 1-9.

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