CN219067005U - Battery monomer and battery pack - Google Patents

Abstract

The utility model discloses a battery monomer and a battery pack, wherein the battery monomer comprises: the battery comprises a battery monomer body and two polar posts, wherein one side surface of the battery monomer body is a polar post leading-out surface; the two polar posts are arranged on the battery monomer body and led out through polar post leading-out surfaces, and the two polar posts are positioned at the opposite ends of the battery monomer body; wherein, a protruding part is formed at the part of the battery monomer body between the two polar posts, the parts of the pole extraction surface, which are positioned on two opposite sides of the protruding part, are battery shoulders, and the two poles are respectively extracted from the two battery shoulders. According to the battery cell provided by the embodiment of the utility model, the protruding parts are formed on the part of the battery cell body, which is positioned between the two polar posts, and the two polar posts are led out from the battery shoulders on the two opposite sides of the protruding parts respectively, so that the effective utilization of space can be ensured, the structure of the battery cell is more compact, the occupation of the battery cell to the space is reduced, the space utilization rate of the battery cell can be improved, and the energy density of the battery cell is improved.

Description

Battery monomer and battery pack

Technical Field

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

Background

In the related art, the structural design of the battery monomer is unreasonable, so that the battery monomer occupies a larger space, and the space utilization rate and the energy density of the battery monomer are lower.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery cell, in which a protruding portion is formed at a portion of a battery cell body between two polar posts, and the two polar posts are led out from battery shoulders at two opposite sides of the protruding portion, so that effective utilization of space can be ensured, the structure of the battery cell is more compact, occupation of the battery cell to the space is reduced, space utilization rate of the battery cell can be improved, and energy density of the battery cell is improved.

The utility model also provides a battery pack with the battery cell.

According to an embodiment of the first aspect of the present utility model, a battery cell includes: the battery unit comprises a battery unit body, wherein one side surface of the battery unit body is a pole extraction surface; the two pole posts are arranged on the battery monomer body and led out through the pole post leading-out surfaces, and the two pole posts are positioned at two opposite ends of the battery monomer body; the battery comprises a battery body, a plurality of battery poles, a plurality of battery shoulders, a plurality of battery lead-out surfaces and a plurality of battery lead-out surfaces, wherein the battery lead-out surfaces are arranged on the battery lead-out surfaces, and the battery lead-out surfaces are respectively connected with the battery lead-out surfaces.

According to the battery cell provided by the embodiment of the utility model, the protruding parts are formed on the part of the battery cell body, which is positioned between the two polar posts, and the two polar posts are led out from the battery shoulders on the two opposite sides of the protruding parts respectively, so that the effective utilization of space can be ensured, the structure of the battery cell is more compact, the occupation of the battery cell to the space is reduced, the space utilization rate of the battery cell can be improved, and the energy density of the battery cell is improved.

According to some embodiments of the utility model, the battery cell body is substantially rectangular, and a side surface in a width direction of the battery cell body is the pole extraction surface.

According to some embodiments of the utility model, the battery cell body comprises: the battery shell, one side surface of the battery shell is the pole extraction surface, and the part of the battery shell between two battery shoulders is a shell convex part; the battery cell is arranged in the battery shell, the pole column leading-out end of the battery cell comprises a battery cell convex part and battery cell shoulders positioned on two opposite sides of the battery cell convex part, the battery cell convex part is accommodated in the shell convex part, the pole column is arranged in the battery cell shoulder part, and the convex part comprises the shell convex part and the battery cell convex part; the inner wall surface of the battery shell comprises a lower plastic mounting surface, the lower plastic mounting surface and the pole leading-out surface are positioned on two opposite sides of the thickness direction of the battery shell, and the lower plastic part is arranged on the lower plastic mounting surface and is positioned between the lower plastic mounting surface and the pole leading-out end; the pole is arranged on the lower plastic part in a penetrating mode and the battery shoulder part in a penetrating mode, and an insulating layer is arranged between the pole and the battery shoulder part.

According to some alternative embodiments of the present utility model, in the arrangement direction of the two poles, the extending shape of the lower plastic mounting surface is the same as the extending shape of the pole outgoing surface, and the extending shape of the lower plastic piece is the same as the extending shape of the lower plastic mounting surface; the lower plastic part comprises plastic convex parts and plastic mounting parts positioned on two opposite sides of the plastic convex parts, the plastic convex parts are positioned between the shell convex parts and the battery cell convex parts, and the plastic mounting parts are positioned between the battery shoulder parts and the battery cell shoulder parts; the battery comprises a battery body, a battery shoulder, a battery post, a plastic mounting part, a battery shoulder, a battery cell protrusion and a battery lug.

According to some alternative embodiments of the present utility model, the battery case includes a case body, one side surface of which is the post extraction surface, and a cover plate, the side of the case body opposite to the post extraction surface being open to form a mounting opening, the cover plate being covered on the mounting opening, and the battery cell being adapted to be mounted into the case body through the mounting opening.

In some optional embodiments of the present utility model, the lower plastic part and the housing main body are all independent molded parts, the lower plastic part is suitable for being mounted into the housing main body through the mounting opening, and the lower plastic part is limited together with the pole leading-out end through the lower plastic mounting surface.

According to some optional embodiments of the utility model, the lower plastic part comprises a lower plastic body and a protruding rib structure, the protruding rib structure is arranged on one side of the lower plastic body facing the lower plastic mounting surface, and the protruding rib structure is abutted or connected with the lower plastic mounting surface.

According to some optional embodiments of the utility model, the battery unit further comprises an upper plastic part and a riveting block, the riveting block is arranged on the battery shoulder, the upper plastic part is arranged between the riveting block and the battery shoulder, the riveting block is a conductive part, the pole is arranged on the lower plastic part, the battery shoulder, the upper plastic part and the riveting block in a penetrating manner, and the pole is connected with the riveting block.

In some alternative embodiments of the present utility model, the upper plastic part is formed with a limit groove, and the riveting block is accommodated in the limit groove.

A battery pack according to an embodiment of the second aspect of the present utility model includes: the battery cell according to the embodiment of the first aspect of the present utility model is described above.

According to the battery pack disclosed by the embodiment of the utility model, the convex parts are formed at the parts of the battery body between the two polar posts by arranging the battery monomers, and the two polar posts are led out from the battery shoulders at the two opposite sides of the convex parts respectively, so that the effective utilization of space can be ensured, the structure of the battery monomers is more compact, the occupation of the battery monomers to the space is reduced, the space utilization rate of the battery monomers can be improved, and the energy density of the battery monomers is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a perspective view of a battery cell according to some embodiments of the present utility model;

FIG. 2 is a schematic view of the battery cell of FIG. 1 at another angle;

FIG. 3 is a schematic view of the battery cell of FIG. 2 at yet another angle;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 5 is an enlarged view at C in fig. 4;

fig. 6 is an exploded view of the battery cell of fig. 1;

FIG. 7 is an enlarged view at A in FIG. 6;

FIG. 8 is an exploded view of the battery cell of FIG. 2, showing the terminal post on the cell;

FIG. 9 is a schematic view of the lower plastic part in FIG. 8;

FIG. 10 is a schematic view of the lower plastic part of FIG. 9 at another angle.

Reference numerals:

100. a battery cell;

10. a battery cell body; 1. a battery case; 11. a post extraction face; 12. a battery shoulder; 121. a second through hole; 13. a housing protrusion; 14. a housing body; 15. a cover plate; 16. a mounting port; 1a, a protruding part; 2. a battery cell; 21. a post terminal; 22. a cell protrusion; 23. a cell shoulder; 24. a connecting sheet; 3. a lower plastic part; 32. a plastic protrusion; 33. a plastic mounting part; 331. a first through hole; 34. a lower plastic body; 35. a convex rib structure; 351. the first convex rib; 352. the second convex rib; 4. a plastic part is arranged; 41. a limit groove; 42. a third through hole; 5. riveting blocks; 51. a fourth through hole; 6. a pole.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The battery cell 100 according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1 to 8, a battery cell 100 according to an embodiment of the first aspect of the present utility model includes: the battery cell body 10 and two poles 6, wherein one side surface of the battery cell body 10 is a pole leading-out surface 11, for example, the upper surface of the battery cell body 10 is a pole leading-out surface 11. The two poles 6 are disposed on the battery body 10, and the two poles 6 are led out through the pole outlet surface 11, and the two poles 6 are disposed at opposite ends of the battery body 10. The portion of the battery monomer body 10 between the two poles 6 is formed with a protruding portion 1a, so that effective utilization of space can be ensured, the portion of the pole extraction surface 11, which is located at two opposite sides of the protruding portion 1a, is a battery shoulder 12, and the two poles 6 are respectively extracted through the two battery shoulders 12, so that the structure of the battery monomer 100 is more compact, occupation of the battery monomer 100 to space is reduced, space utilization of the battery monomer 100 is improved, and energy density of the battery monomer 100 is improved.

According to the battery cell 100 of the embodiment of the utility model, the protruding portions 1a are formed at the portions of the battery cell body 10 located between the two pole posts 6, and the two pole posts 6 are led out through the battery shoulders 12 at the two opposite sides of the protruding portions 1a, so that effective utilization of space can be ensured, the structure of the battery cell 100 is more compact, occupation of the battery cell 100 to the space is reduced, the space utilization rate of the battery cell 100 can be improved, and energy density of the battery cell 100 is improved.

Referring to fig. 1 to 8, according to some embodiments of the present utility model, the battery cell body 10 is substantially rectangular, one side surface of the battery cell body 10 in the width direction is a post extraction surface 11, for example, the width direction of the battery cell body 10 may refer to the up-down direction in the drawings, and the upper surface of the battery cell body 10 is the post extraction surface 11.

Referring to fig. 3 and 8, according to some embodiments of the present utility model, a battery cell body 10 includes a battery case 1, a battery core 2, and a lower plastic member 3, one side surface of the battery case 1 is a post extraction surface 11, a portion of the battery case 1 between two battery shoulders 12 is a case protrusion 13, for example, an upper surface of the battery case 1 is the post extraction surface 11, the two battery shoulders 12 are located at left and right ends of the post extraction surface 11, and the case protrusion 13 is located between the two battery shoulders 12. The battery cell 2 is arranged in the battery shell 1, the pole extraction end 21 of the battery cell 2 comprises a battery cell convex part 22 and battery cell shoulder parts 23, the battery cell shoulder parts 23 are positioned on two opposite sides of the battery cell convex part 22, and the battery cell convex part 22 is accommodated in the shell convex part 13, so that the battery cell 2 and the battery shell 1 can be closely matched; the terminal 6 is disposed on the battery shoulder 23, and the two terminal 6 are disposed on the two battery shoulders 12 respectively, so that the overall structure is compact, which is beneficial to saving space, for example, the terminal 6 can be connected with the battery core 2 through the connecting piece 24. Wherein the protrusion 1a comprises a housing protrusion 13 and a cell protrusion 22.

Referring to fig. 3, the inner wall surface of the battery case 1 includes a lower plastic mounting surface, the lower plastic mounting surface and the post extraction surface 11 are located on opposite sides of the thickness direction of the battery case 1, for example, the post extraction surface 11 is located on the upper side of the battery case 1, the lower plastic mounting surface is located on the lower side of the battery case 1, the lower plastic mounting surface and the post extraction surface 11 correspond to each other in the up-down direction, and the shape of the lower plastic mounting surface and the post extraction surface 11 is the same. The lower plastic part 3 is arranged on the lower plastic mounting surface, and the lower plastic part 3 is arranged between the lower plastic mounting surface and the pole leading-out end 21, and the lower plastic part 3 can separate the lower plastic mounting surface from the pole leading-out end 21, so that the lower plastic part 3 separates the battery case 1 from the pole leading-out end 21, and insulation between the battery case 1 and the pole leading-out end 21 can be realized. The pole 6 is disposed through the lower plastic member 3 and the battery shoulder 12, and an insulating layer is disposed between the pole 6 and the battery shoulder 12, so that the pole 6 is insulated from the battery shoulder 12, and the pole 6 is prevented from contacting the battery shoulder 12 to cause a short circuit between the pole 6 and the battery housing 1.

Referring to fig. 3-10, according to some alternative embodiments of the present utility model, in the arrangement direction of the two poles 6 (for example, referring to the left-right direction in the drawing), the extension shape of the lower plastic mounting surface is the same as the extension shape of the pole lead-out surface 11, and the extension shape of the lower plastic mounting surface may also be the same as the extension shape of the pole lead-out end 21, and the extension shape of the lower plastic member 3 is the same as the extension shape of the lower plastic mounting surface, so that the lower plastic member 3 may be closely matched with the lower plastic mounting surface, which is beneficial to saving space. Wherein, lower plastic part 3 includes plastic convex part 32 and plastic installation department 33, and plastic installation department 33 is located plastic convex part 32 opposite sides, and plastic convex part 32 is located between casing convex part 13 and the electric core convex part 22, and plastic convex part 32 can separate casing convex part 13 and electric core convex part 22, and plastic installation department 33 is located between battery shoulder 12 and electric core shoulder 23, and plastic installation department 33 can separate battery shoulder 12 and electric core shoulder 23 to can realize that lower plastic separates electric core 2 and battery case 1, in order to realize insulating between electric core 2 and the battery case 1.

The pole 6 is disposed through the plastic mounting portion 33 and the battery shoulder 12, and the protruding portion 1a includes a housing protruding portion 13, a battery core protruding portion 22 and a plastic protruding portion 32. For example, referring to fig. 4, the plastic mounting portion 33 has a first through hole 331, the battery shoulder 12 has a second through hole 121, the first through hole 331 is correspondingly communicated with the second through hole 121, the battery shoulder 12 is located at the upper side of the plastic mounting portion 33, and the pole 6 can sequentially pass through the first through hole 331 and the second through hole 121 from bottom to top, so that the pole 6 can pass through the plastic mounting portion 33 and the battery shoulder 12; in addition, the inside of the first through hole 331 has an insulating layer that separates the pole 6 from the battery shoulder 12 so that the pole 6 is insulated from the battery shoulder 12.

Referring to fig. 3 and 8, according to some alternative embodiments of the present utility model, the battery case 1 includes a case body 14 and a cap plate 15, one side surface of the case body 14 is a terminal extraction surface 11, a side of the case body 14 opposite to the terminal extraction surface 11 is opened to form a mounting opening 16, the cap plate 15 is covered on the mounting opening 16, and the battery cell 2 is adapted to be mounted into the case body 14 through the mounting opening 16. For example, the upper surface of the housing body 14 is a pole extraction surface 11, the lower side of the housing body 14 is opened to form a mounting opening 16, and the battery cell 2 can be mounted into the housing body 14 from bottom to top through the mounting opening 16.

In some alternative embodiments of the present utility model, the lower plastic part 3 and the housing body 14 are separate molded parts, and the materials of the lower plastic part 3 and the housing body 14 may be different; the lower plastic part 3 is suitable for being installed into the shell body 14 through the installation opening 16, and the lower plastic part 3 is limited together with the pole leading-out end 21 through the lower plastic installation surface, so that the installation stability of the lower plastic part 3 can be ensured. For example, the upper surface of the housing body 14 is a pole extraction surface 11, the inner wall surface of the housing body 14 corresponding to the pole extraction surface 11 is a lower plastic mounting surface, the upper end of the battery cell 2 is a pole extraction end 21, the lower plastic part 3 and the battery cell 2 are sequentially mounted in the housing body 14, the lower plastic part 3 is located at the lower side of the lower plastic mounting surface, the battery cell 2 is located at the lower side of the lower plastic part 3, and the lower plastic mounting surface and the pole extraction end 21 limit the lower plastic part 3 in the vertical direction together.

For example, when assembling the battery unit 100, the lower plastic part 3 may be first installed into the housing body 14 from the installation opening 16 from bottom to top, the lower plastic part 3 is located at the lower side of the lower plastic installation surface, and the lower plastic part 3 is matched with the lower plastic installation surface; the battery core 2 is installed in the shell body 14 from bottom to top through the installation opening 16, the pole leading-out end 21 is located at the lower side of the lower plastic part 3, the pole leading-out end 21 is matched with the lower end of the lower plastic part 3, and the pole 6 sequentially penetrates through the first through hole 331 and the second through hole 121 from bottom to top, so that the pole 6 can penetrate through the plastic installation portion 33 of the lower plastic and the battery shoulder 12 of the shell body 14.

Referring to fig. 9 and 10, according to some alternative embodiments of the present utility model, the lower plastic part 3 includes a lower plastic body 34 and a rib structure 35, the rib structure 35 is disposed on a side of the lower plastic body 34 facing the lower plastic mounting surface, the rib structure 35 helps to enhance the structural strength of the lower plastic part 3, and the rib structure 35 abuts against the lower plastic mounting surface, i.e., the rib structure 35 abuts against the inner wall surface of the battery case 1; alternatively, the rib structure 35 may be connected to the lower plastic mounting surface, that is, the rib structure 35 may be connected to the inner wall surface of the battery case 1. Because the lower plastic part 3 is positioned between the lower plastic mounting surface and the pole leading-out end 21, the pole leading-out end 21 can be separated from the lower plastic mounting surface by abutting or connecting the convex rib structure 35 with the lower plastic mounting surface, so that the battery cell 2 and the battery shell 1 are insulated; and the lower plastic has a simpler structure and is easy to manufacture.

For example, referring to fig. 9 and 10, the bead structure 35 includes a first bead 351 and a second bead 352, the first bead 351 may surround the outer peripheral side of the lower plastic body 34, and the first bead 351 protrudes toward one side of the lower plastic mounting surface; the second ribs 352 may be located at the plastic mounting portion 33, and the second ribs 352 may surround the outer periphery of the first through hole 331, and the first ribs 351 protrude toward one side of the lower plastic mounting surface; the first convex rib 351 and the second convex rib 352 are abutted with the lower plastic mounting surface; alternatively, the first rib 351 and the second rib 352 are connected to the lower plastic mounting surface.

Referring to fig. 4 and 5, according to some alternative embodiments of the present utility model, the battery cell 100 further includes an upper plastic member 4 and a rivet block 5, the rivet block 5 is disposed on the battery shoulder 12, the rivet block 5 is a conductive member, and the upper plastic member 4 is disposed between the rivet block 5 and the battery shoulder 12, so that the rivet block 5 and the battery shoulder 12 can be separated to realize insulation between the rivet block 5 and the battery case 1. The pole 6 is penetrated in the lower plastic part 3, the battery shoulder 12, the upper plastic part 4 and the riveting block 5, and the pole 6 is connected with the riveting block 5, so that the lower plastic part 3, the battery shoulder 12 and the upper plastic part 4 can be fixed between the riveting block 5 and the battery core 2, the whole structure is stable, and the fixing mode is simpler. In the related art, a light aluminum sheet is arranged between the lower plastic and the riveting block, and the battery cell 100 of the application can cancel the light aluminum sheet of the related art, and is connected with the riveting block 5 through the pole column 6, so that the lower plastic part 3, the battery shoulder 12 and the upper plastic part 4 are fixed between the riveting block 5 and the electric core 2, and the structure of the lower plastic part 3 is simpler, so that the structure of the battery cell 100 is simpler, and the cost is saved.

For example, referring to fig. 7, according to some embodiments of the present utility model, the upper plastic part 4 has a third through hole 42, the rivet block 5 has a fourth through hole 51, the third through hole 42, the fourth through hole 51, the second through hole 121 and the first through hole 331 are correspondingly communicated with each other, the lower end of the rivet block 5 may pass through the third through hole 42, the second through hole 121 and the first through hole 331 in sequence, the post 6 may pass through the first through hole 331 such that the post 6 passes through the lower plastic part 3, the battery shoulder 12, the upper plastic part 4 and the rivet block 5, and the post 6 may be riveted and welded with the rivet block 5.

Referring to fig. 7, in some alternative embodiments of the present utility model, the upper plastic part 4 is formed with a limiting groove 41, and the riveting block 5 is accommodated in the limiting groove 41, so that the riveting block 5 is more tightly matched with the upper plastic part 4, the overall structure is more compact, and the occupation of the battery cell 100 to the space can be reduced. For example, the limiting groove 41 may be rectangular, correspondingly, the riveting block 5 may also be rectangular, and the riveting block 5 is accommodated in the limiting groove 41, so that the riveting block 5 can be prevented from rotating relative to the upper plastic part 4.

A battery pack according to an embodiment of the second aspect of the present utility model includes: the battery cell 100 according to the embodiment of the first aspect of the present utility model described above. For example, the battery pack may be formed by stacking a plurality of the battery cells 100, and the overall structure of the battery pack is compact and the space utilization is high.

According to the battery pack provided by the embodiment of the utility model, the protruding parts 1a are formed at the parts of the battery body 10 between the two pole posts 6, and the two pole posts 6 are led out through the battery shoulders 12 at the two opposite sides of the protruding parts 1a respectively, so that the effective utilization of space can be ensured, the structure of the battery cell 100 is more compact, the occupation of the battery cell 100 to the space is reduced, the space utilization rate of the battery cell 100 can be improved, and the energy density of the battery cell 100 is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery cell, comprising:

the battery unit comprises a battery unit body, wherein one side surface of the battery unit body is a pole extraction surface;

the two pole posts are arranged on the battery monomer body and led out through the pole post leading-out surfaces, and the two pole posts are positioned at two opposite ends of the battery monomer body;

the battery comprises a battery body, a plurality of battery poles, a plurality of battery shoulders, a plurality of battery lead-out surfaces and a plurality of battery lead-out surfaces, wherein the battery lead-out surfaces are arranged on the battery lead-out surfaces, and the battery lead-out surfaces are respectively connected with the battery lead-out surfaces.

2. The battery cell according to claim 1, wherein the battery cell body is substantially rectangular, and a widthwise one-side surface of the battery cell body is the post extraction surface.

3. The battery cell of claim 1, wherein the cell body comprises:

the battery shell, one side surface of the battery shell is the pole extraction surface, and the part of the battery shell between two battery shoulders is a shell convex part;

the battery cell is arranged in the battery shell, the pole column leading-out end of the battery cell comprises a battery cell convex part and battery cell shoulders positioned on two opposite sides of the battery cell convex part, the battery cell convex part is accommodated in the shell convex part, the pole column is arranged in the battery cell shoulder part, and the convex part comprises the shell convex part and the battery cell convex part;

the inner wall surface of the battery shell comprises a lower plastic mounting surface, the lower plastic mounting surface and the pole leading-out surface are positioned on two opposite sides of the thickness direction of the battery shell, and the lower plastic part is arranged on the lower plastic mounting surface and is positioned between the lower plastic mounting surface and the pole leading-out end;

the pole is arranged on the lower plastic part in a penetrating mode and the battery shoulder part in a penetrating mode, and an insulating layer is arranged between the pole and the battery shoulder part.

4. A battery cell according to claim 3, wherein the extending shape of the lower plastic mounting surface is the same as the extending shape of the pole extraction surface in the arrangement direction of the two poles, and the extending shape of the lower plastic member is the same as the extending shape of the lower plastic mounting surface;

the lower plastic part comprises plastic convex parts and plastic mounting parts positioned on two opposite sides of the plastic convex parts, the plastic convex parts are positioned between the shell convex parts and the battery cell convex parts, and the plastic mounting parts are positioned between the battery shoulder parts and the battery cell shoulder parts;

the battery comprises a battery body, a battery shoulder, a battery post, a plastic mounting part, a battery shoulder, a battery cell protrusion and a battery lug.

5. The battery cell according to claim 3, wherein the battery case includes a case body and a cover plate, one side surface of the case body is the terminal extraction surface, a side of the case body opposite to the terminal extraction surface is opened to form a mounting opening, the cover plate is covered on the mounting opening, and the battery cell is adapted to be mounted into the case body through the mounting opening.

6. The battery cell as recited in claim 5, wherein the lower plastic piece and the housing body are each an independent molded piece, the lower plastic piece is adapted to be mounted into the housing body through the mounting opening, and the lower plastic piece is co-limited with the post terminal through the lower plastic mounting surface.

7. A battery cell according to claim 3, wherein the lower plastic part comprises a lower plastic body and a protruding rib structure, the protruding rib structure is arranged on one side of the lower plastic body facing the lower plastic mounting surface, and the protruding rib structure is abutted or connected with the lower plastic mounting surface.

8. The battery cell of claim 3, further comprising an upper plastic piece and a rivet block, wherein the rivet block is disposed at the battery shoulder, the upper plastic piece is disposed between the rivet block and the battery shoulder, the rivet block is a conductive piece, the post is disposed through the lower plastic piece, the battery shoulder, the upper plastic piece, and the rivet block, and the post is connected with the rivet block.

9. The battery cell of claim 8, wherein the upper plastic member is formed with a limit groove, and the rivet block is received in the limit groove.

10. A battery pack, comprising: the battery cell according to any one of claims 1-9.

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