Top cover assembly of battery, battery monomer and battery pack with battery monomer

Abstract

The utility model discloses a top cover assembly of a battery, a battery monomer and a battery pack with the battery monomer, the top cover assembly of the battery comprises a cover body, a top cover and a top cover, the pole is arranged in the mounting hole in a penetrating manner; the upper insulating part is arranged on the pole in a sleeving manner; the top cover patch comprises a plane part and a bending part, the plane part is attached to the first side of the cover body, a first avoiding hole is formed in the plane part, the upper insulating part is located on the inner side of the first avoiding hole, a gap is formed between the outer circumferential wall of the upper insulating part and the inner circumferential wall of the first avoiding hole, and the bending part surrounds the first avoiding hole; one axial end of the bending part extends towards the plane part in the direction away from the cover body and extends towards the inner side of the first avoiding hole, and in the plane projection parallel to the cover body, the projection of the bending part completely covers the projection of the part, located in the gap, of the cover body. According to the top cover assembly of the battery, the cover body can be subjected to insulation protection, the high-voltage arc discharge phenomenon is avoided, and the safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly, a battery monomer and a battery pack having the same. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and people have increasing requirements for the performance and safety of lithium-ion batteries.

[0003] In the related technology, the battery cell is the core component of the lithium-ion battery. Its structure mainly includes external insulation components, packaging pole group components, cover internal insulation components and electrical connection components. The pole group inside the battery cell is connected to the pole on the top cover, and the positive and negative poles are respectively led out to realize a complete circuit. In the external connection, the battery cell will be treated as an independent small unit. The poles of adjacent battery cells are welded together in series or parallel through BUSBAR (bar piece) to realize grouping and finally assembled into a pack battery pack.

[0004] In the existing scheme, the external insulation of the battery cell is mainly through the external insulation film of the battery cell and the top cover insulation patch. The external insulation film of the battery cell can achieve the aluminum shell without leakage, but the top cover insulation patch will expose part of the top cover in the top cover pole area. When the bar is welded on the surface of the pole, the lower surface of the bar will be opposite to the exposed top cover. Although there is a certain height difference between the two and there is no direct contact, the battery cells are prone to high-voltage arcing after being grouped. In severe cases, the whole package will be out of control, resulting in the destruction of the vehicle and the death of people. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery top cover assembly, which can insulate and protect the exposed cover body part, avoid high-voltage arcing, ensure the safety and reliability of the battery pack, and ensure the safety of personnel.

[0006] The utility model also provides a battery cell, which includes the battery top cover assembly mentioned above.

[0007] The utility model also provides a battery pack, which includes the above-mentioned battery monomer.

[0008] The top cover assembly of the battery according to the embodiment of the utility model comprises: a cover body, the cover body having a mounting hole penetrating the cover body in the thickness direction of the cover body; a pole, the pole is arranged in the mounting hole; an upper insulating member, the upper insulating member is sleeved on the pole, at least part of the upper insulating member is located on the first side of the thickness direction of the cover body; a top cover patch, the top cover patch comprises a plane portion and a bending portion, the plane portion is attached to the first side of the cover body, and the plane portion has a first avoidance hole for avoiding the pole, the upper insulating member is located on the inner side of the first avoidance hole, and there is a gap between the outer peripheral wall of the upper insulating member and the inner peripheral wall of the first avoidance hole, the bending portion is annular and arranged around the first avoidance hole, one axial end of the bending portion is connected to the plane portion, and the other axial end extends toward the plane portion in a direction away from the cover body and toward the inner side of the first avoidance hole, and in a plane projection parallel to the cover body, the projection of the bending portion completely covers the projection of the part of the cover body located in the gap.

[0009] According to the top cover assembly of the battery in the embodiment of the utility model, the top cover patch includes a flat portion and a bent portion, the flat portion is attached to the first side of the cover body, and a gap is provided between the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, the bent portion is annular and arranged around the first avoidance hole, one axial end of the bent portion is connected to the flat portion, and the other axial end extends toward the flat portion away from the cover body and toward the inside of the first avoidance hole, in the plane projection parallel to the cover body, the projection of the bent portion completely covers the projection of the portion of the cover body located in the gap, the setting of the bent portion can separate the gap between the tab and the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, and insulate the exposed cover body portion to avoid the portion of the cover body located in the gap from being exposed and directly opposite to the tab, thereby improving the insulation protection level of the top cover assembly of the battery, avoiding the risk of high-voltage short circuit between the tab and the cover body, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring personnel safety.

[0010] In addition, the top cover assembly of the battery according to the utility model may also have the following additional technical features:

[0011] In some embodiments, in a plane projection parallel to the cover body, the projected inner contour of the bent portion is located radially inward of the projected inner contour of a portion of the cover body located in the gap, and in the thickness direction of the cover body, an end of the bent portion away from the planar portion is located on the side of the upper insulating member that is away from the cover body.

[0012] In some embodiments, one end of the bent portion away from the planar portion is in contact with the upper insulating member.

[0013] In some embodiments, the inner circumferential wall of one end of the bending portion connected to the planar portion is flush with the inner circumferential wall of the first avoidance hole.

[0014] In some embodiments, in the direction from one end of the bent portion connected to the planar portion to the other end, the bent portion includes a first section and a second section in sequence, the first section extends along the axial direction of the first avoidance hole, the first section surrounds the upper insulating member and is spaced apart from the upper insulating member, and the end of the second section away from the first section extends toward the radial inner side of the first avoidance hole.

[0015] In some embodiments, an end of the second segment facing away from the first segment is spaced apart from an outer peripheral wall of the pole.

[0016] In some embodiments, the bending portion is provided with a plurality of cutouts, and the plurality of cutouts are spaced apart in a circumferential direction of the bending portion.

[0017] In some embodiments, the top cover patch is an integral piece; and / or, an explosion-proof valve is provided on the cover body, and a second avoidance hole for avoiding the explosion-proof valve is provided on the planar portion; and / or, the pole is two spaced apart, and the mounting hole, the first avoidance hole and the bending portion are two corresponding ones.

[0018] The utility model also provides a battery cell having the above embodiment.

[0019] According to the battery cell of the embodiment of the utility model, a top cover assembly of the battery as described above is provided, and a top cover patch includes a flat portion and a bent portion, the flat portion is attached to the first side of the cover body, and a gap is provided between the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, the bent portion is annular and is arranged around the first avoidance hole, one axial end of the bent portion is connected to the flat portion, and the other axial end extends toward the flat portion away from the cover body and toward the inner side of the first avoidance hole, in a plane projection parallel to the cover body, the projection of the bent portion completely covers the projection of the portion of the cover body located in the gap, and the setting of the bent portion can separate the gap between the tab and the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, and insulate the exposed cover body portion to avoid the portion of the cover body located in the gap from being exposed and directly opposite to the tab, thereby improving the insulation protection level of the top cover assembly of the battery, avoiding the risk of high-voltage short circuit between the tab and the cover body, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring personnel safety.

[0020] The battery pack according to the embodiment of the present invention includes the above-mentioned battery cells, wherein there are multiple battery cells, and the poles of two adjacent battery cells are electrically connected through a bar sheet.

[0021] According to the battery pack of the embodiment of the utility model, the battery cell mentioned above is provided, and the top cover patch includes a flat portion and a bent portion, the flat portion is attached to the first side of the cover body, and a gap is provided between the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, the bent portion is annular and is arranged around the first avoidance hole, one axial end of the bent portion is connected to the flat portion, and the other axial end extends toward the flat portion away from the cover body and toward the inside of the first avoidance hole, in the plane projection parallel to the cover body, the projection of the bent portion completely covers the projection of the portion of the cover body located in the gap, and the setting of the bent portion can separate the gap between the tab and the outer circumferential wall of the upper insulating member and the inner circumferential wall of the first avoidance hole, and insulate the exposed cover body portion to avoid the portion of the cover body located in the gap from being exposed and directly opposite to the tab, thereby improving the insulation protection level of the top cover assembly of the battery, avoiding the risk of high-voltage short circuit between the tab and the cover body, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring the safety of personnel.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is an exploded view of a battery cell according to an embodiment of the utility model;

[0025] Figure 2 is a partial cross-sectional view of a battery cell according to an embodiment of the utility model;

[0026] Figure 3 is a three-dimensional diagram of a battery cell according to an embodiment of the present utility model, wherein the tab is not shown;

[0027] Figure 4 is a top view of a battery cell according to an embodiment of the present utility model, wherein the tab is not shown;

[0028] Figure 5 is along Figure 4 Sectional view along line AA;

[0029] Figure 6 It is a three-dimensional view of a top cover patch of a top cover assembly of a battery according to an embodiment of the utility model at one angle;

[0030] Figure 7 is a three-dimensional view of a top cover patch of a top cover assembly of a battery according to an embodiment of the utility model from another angle;

[0031] Figure 8 is a top view of a top cover patch of a top cover assembly of a battery according to an embodiment of the utility model;

[0032] Fig. 9 is along Figure 8 Cross-sectional view along line BB.

[0033] Reference numerals:

[0034] 100. Battery cell;

[0035] 10. Top cover assembly;

[0036] 1. Cover body; 11. Mounting hole; 12. First side; 13. Explosion-proof valve;

[0037] 2. Pole;

[0038] 3. Top cover patch; 31. First avoidance hole; 311. Gap; 32. Second avoidance hole; 33. Plane portion; 34. Bend portion; 341. First section; 342. Second section; 343. Cut-off;

[0039] 4. Upper insulation;

[0040] 5. Pian. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The top cover assembly 10 of a battery according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0046] like Figure 1 and attached Figure 2 As shown, the top cover assembly 10 of the battery according to the embodiment of the utility model includes a cover body 1, a pole 2, an upper insulating member 4, and a top cover patch 3.

[0047] Specifically, refer to the attached Figure 1 and attached Figure 5 As shown, the cover body 1 can be welded with the aluminum shell of the battery cell 100 to isolate the internal and external environments of the battery cell 100, thereby playing a sealing role. The cover body 1 has a thickness direction of the cover body 1 (refer to the attached Figure 2 The mounting hole 11 of the cover body 1 is penetrated in the vertical direction as shown in the figure. The pole 2 is arranged in the mounting hole 11. The tab 5 is electrically connected to the pole 2. The current inside the battery cell 100 can be transmitted to the outside through the pole 2, playing a guiding role. Figure 1 and attached Figure 5 As shown, the upper insulating member 4 is sleeved on the pole 2 to prevent the cover body 1 from contacting the pole 2 and to avoid short circuit. At least part of the upper insulating member 4 is located on the first side 12 of the cover body 1 in the thickness direction.

[0048] Further, see Appendix Figure 2 , Attachment Figure 6 and attached Figure 7 As shown, the top cover patch 3 is an insulating member, and the top cover patch 3 includes a flat portion 33 and a bent portion 34. The flat portion 33 is attached to the first side 12 (such as Figure 2The upper side shown in the figure) can play an external insulation role for the battery cell 100 from the first side 12 to prevent the cover body 1 from contacting with external metal and avoiding short circuit. The plane portion 33 has a first avoidance hole 31 for avoiding the pole 2. The upper insulating member 4 is located on the inner side of the first avoidance hole 31 and there is a gap 311 between the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31. The bent portion 34 is annular and is arranged around the first avoidance hole 31. One axial end of the bent portion 34 is connected to the plane portion 33, and the other axial end extends toward the direction of the plane portion 33 away from the cover body 1 and toward the inner side of the first avoidance hole 31. In the plane projection parallel to the cover body 1, the projection of the bent portion 34 completely covers the projection of the portion of the cover body 1 located in the gap 311.

[0049] It can be understood that the setting of the bending portion 34 can separate the gap 311 between the tab 5 and the outer peripheral wall of the upper insulating part 4 and the inner peripheral wall of the first avoidance hole 31, and provide insulation protection for the exposed part of the cover body 1, thereby preventing the part of the cover body 1 located in the gap 311 from being exposed and directly opposite to the tab 5, thereby improving the insulation protection level of the battery's top cover assembly 10, avoiding the risk of high-voltage short circuit between the tab 5 and the cover body 1, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring personnel safety.

[0050] According to the top cover assembly 10 of the battery of the embodiment of the utility model, the top cover patch 3 includes a plane portion 33 and a bent portion 34, the plane portion 33 is attached to the first side 12 of the cover body 1, and a gap 311 is provided between the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31, the bent portion 34 is annular and is arranged around the first avoidance hole 31, one axial end of the bent portion 34 is connected to the plane portion 33, and the other axial end extends toward the plane portion 33 away from the cover body 1 and toward the inside of the first avoidance hole 31, and in the plane projection parallel to the cover body 1, the bent portion 34 The projection completely covers the projection of the portion of the cover body 1 located in the gap 311. The setting of the bending portion 34 can separate the gap 311 between the tab 5 and the outer peripheral wall of the upper insulating part 4 and the inner peripheral wall of the first avoidance hole 31, and insulate the exposed portion of the cover body 1 to avoid that the portion of the cover body 1 located in the gap 311 is exposed and directly opposite to the tab 5, thereby improving the insulation protection level of the battery top cover assembly 10, avoiding the risk of high-voltage short circuit between the tab 5 and the cover body 1, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring the safety of personnel.

[0051] In some embodiments of the present invention, refer to the attached Figure 2As shown, in the plane projection parallel to the cover body 1, the projected inner contour of the bent portion 34 is located radially inward of the projected inner contour of the portion of the cover body 1 located in the gap 311. In the thickness direction of the cover body 1, the end of the bent portion 34 away from the planar portion 33 is located on the side of the upper insulating member 4 away from the cover body 1, which can prevent the portion of the cover body 1 located in the gap 311 from being exposed and directly opposite to the tab 5, further reducing the risk of high-voltage short circuit between the tab 5 and the cover body 1, reducing the risk of high-voltage arcing, and improving the safety of the battery pack.

[0052] In a further embodiment of the present invention, refer to the attached Figure 2 As shown, one end of the bent portion 34 away from the planar portion 33 is in contact with the upper insulating member 4, which can better separate the portion of the cover body 1 located in the gap 311 from the tab 5, thereby ensuring the insulation effect of the top cover patch 3, further reducing the risk of high-voltage short circuit between the tab 5 and the cover body 1, and improving the safety of the top cover assembly 10 of the battery.

[0053] In some embodiments of the present invention, refer to the attached Figure 2 and attached Fig. 9 As shown, the inner wall of one end of the bending portion 34 connected to the planar portion 33 is flush with the inner wall of the first avoidance hole 31, which can facilitate the production and processing of the top cover patch 3 and reduce the production difficulty of the battery top cover assembly 10.

[0054] In some embodiments of the present invention, refer to the attached Figure 2 As shown, in the direction from one end of the bending portion 34 connected to the plane portion 33 to the other end, the bending portion 34 includes a first section 341 and a second section 342 in sequence, and the first section 341 is along the axial direction of the first avoidance hole 31 (see the attached Figure 2 The first section 341 surrounds the upper insulating member 4 and is separated from the upper insulating member 4, and the end of the second section 342 away from the first section 341 extends radially inwardly toward the first avoidance hole 31. On the basis of ensuring the normal assembly of the battery top cover assembly 10, the part of the cover body 1 located in the gap 311 can be separated from the tab 5, thereby ensuring the insulation effect of the top cover patch 3, further reducing the risk of high-voltage short circuit between the tab 5 and the cover body 1, and improving the safety of the battery top cover assembly 10.

[0055] In a further embodiment of the present invention, refer to the attached Figure 2 As shown, the end of the second section 342 away from the first section 341 is spaced apart from the outer peripheral wall of the pole 2, so as to prevent the second section 342 from affecting the normal welding of the bar piece 5 and the pole 2, thereby ensuring the reliability and stability of the connection between the bar piece 5 and the pole 2.

[0056] In some embodiments of the present invention, refer to the attached Figure 3 and attached Figure 4As shown, the bending portion 34 is provided with a plurality of cutouts 343, and the plurality of cutouts 343 are arranged at intervals in the circumferential direction of the bending portion 34, which can facilitate the bending and attachment of the bending portion 34 and the production and processing of the top cover patch 3. Figure 8 As shown, the bending portion 34 is provided with four cutouts 343, which are evenly spaced in the circumferential direction of the bending portion 34, and the width of each cutout 343 is 0.5 mm. It should be noted that the number of the cutouts 343 is not limited, and the width of the cutouts 343 is not too limited. Theoretically, it is sufficient for the cutouts 343 to exist, and the narrower the better.

[0057] In some embodiments of the present invention, refer to the attached Figure 6 and attached Figure 7 As shown, the top cover patch 3 is an integrated piece, which can simplify the assembly process of the top cover assembly 10 of the battery and reduce the difficulty of assembling the top cover assembly 10 of the battery.

[0058] Further, see Attachment Figure 1 As shown, the cover body 1 is provided with an explosion-proof valve 13, and the plane portion 33 is provided with a second avoidance hole 32 for avoiding the explosion-proof valve 13. The setting of the explosion-proof valve 13 can discharge the high-temperature and high-pressure gas inside the battery cell 100, avoid fire and cause serious safety accidents, and improve the safety performance of the battery cell 100. Optionally, the cover body 1 is a plain aluminum sheet, and the explosion-proof valve 13 is welded to the cover body 1 by laser.

[0059] Further, see Appendix Figure 1 and attached Figure 5 As shown, there are two poles 2 spaced apart, the mounting hole 11, the first avoidance hole 31 and the bending portion 34 are all corresponding to two, and the two poles 2 are connected to the pole group inside the battery cell 100, and the positive pole and the negative pole are respectively led out to realize a complete circuit.

[0060] The present invention also provides a battery cell 100 having the battery top cover assembly 10 of the above embodiment.

[0061] According to the battery cell 100 of the embodiment of the utility model, the top cover assembly 10 of the battery is provided, and the top cover patch 3 includes a plane portion 33 and a bent portion 34. The plane portion 33 is attached to the first side 12 of the cover body 1, and a gap 311 is provided between the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31. The bent portion 34 is annular and is arranged around the first avoidance hole 31. One axial end of the bent portion 34 is connected to the plane portion 33, and the other axial end extends toward the direction of the plane portion 33 away from the cover body 1 and toward the inside of the first avoidance hole 31. In the plane projection parallel to the cover body 1, The projection of the bent portion 34 completely covers the projection of the portion of the cover body 1 located in the gap 311. The setting of the bent portion 34 can separate the gap 311 between the tab 5 and the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31, and insulate the exposed portion of the cover body 1 to avoid that the portion of the cover body 1 located in the gap 311 is exposed and directly opposite to the tab 5, thereby improving the insulation protection level of the battery's top cover assembly 10, avoiding the risk of high-voltage short circuit between the tab 5 and the cover body 1, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring personnel safety.

[0062] The present invention also provides a battery pack having the battery cell 100 of the above embodiment.

[0063] Specifically, there are multiple battery cells 100, and the poles 2 of two adjacent battery cells 100 are electrically connected through the bar sheet 5. The poles 2 of two adjacent battery cells 100 are connected in series or in parallel through the bar sheet 5 to achieve grouping and finally assembled into a battery pack.

[0064] According to the battery pack of the embodiment of the utility model, the battery cell 100 described above is provided, and the top cover patch 3 includes a plane portion 33 and a bent portion 34, the plane portion 33 is attached to the first side 12 of the cover body 1, and a gap 311 is provided between the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31, and the bent portion 34 is annular and arranged around the first avoidance hole 31, and one axial end of the bent portion 34 is connected to the plane portion 33, and the other axial end extends toward the plane portion 33 away from the cover body 1 and toward the inside of the first avoidance hole 31, and in the plane projection parallel to the cover body 1, the bent portion 34 is The projection of the folded portion 34 completely covers the projection of the portion of the cover body 1 located in the gap 311. The setting of the bent portion 34 can separate the gap 311 between the tab 5 and the outer peripheral wall of the upper insulating member 4 and the inner peripheral wall of the first avoidance hole 31, thereby providing insulation protection for the exposed portion of the cover body 1, thereby preventing the portion of the cover body 1 located in the gap 311 from being exposed and directly facing the tab 5, thereby improving the insulation protection level of the battery's top cover assembly 10, avoiding the risk of high-voltage short circuit between the tab 5 and the cover body 1, and avoiding the occurrence of high-voltage arcing, thereby ensuring the safety and reliability of the battery pack and ensuring personnel safety.

[0065] The top cover assembly 10 , the battery cell 100 and other structures and operations of the battery pack according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A top cover assembly of a battery, characterized in that: include: a cover body, wherein the cover body has a mounting hole penetrating the cover body in a thickness direction of the cover body; a pole, the pole being inserted into the mounting hole; an upper insulating member, wherein the upper insulating member is sleeved on the pole, and at least a portion of the upper insulating member is located on a first side in a thickness direction of the cover body; A top cover patch, the top cover patch includes a flat portion and a bent portion, the flat portion is attached to the first side of the cover body, and the flat portion has a first avoidance hole for avoiding the pole, the upper insulating member is located on the inner side of the first avoidance hole and there is a gap between the outer peripheral wall of the upper insulating member and the inner peripheral wall of the first avoidance hole, the bent portion is annular and is arranged around the first avoidance hole, one axial end of the bent portion is connected to the flat portion, and the other axial end extends toward the flat portion in a direction away from the cover body and toward the inner side of the first avoidance hole, and in a plane projection parallel to the cover body, the projection of the bent portion completely covers the projection of the portion of the cover body located in the gap.

2. The top cover assembly of the battery according to claim 1, characterized in that: In the plane projection parallel to the cover body, the projected inner contour of the bent portion is located radially inward of the projected inner contour of the portion of the cover body located in the gap, and in the thickness direction of the cover body, the end of the bent portion away from the planar portion is located on the side of the upper insulating member facing away from the cover body.

3. The top cover assembly of the battery according to claim 2, characterized in that: One end of the bent portion away from the planar portion is in contact with the upper insulating member.

4. The top cover assembly of the battery according to claim 1, characterized in that: An inner peripheral wall of one end of the bent portion connected to the planar portion is flush with an inner peripheral wall of the first evacuation hole.

5. The top cover assembly of the battery according to claim 1, characterized in that: In the direction from one end where the bent portion is connected to the planar portion to the other end, the bent portion includes a first section and a second section in sequence, the first section extends along the axial direction of the first avoidance hole, the first section surrounds the upper insulating member and is spaced apart from the upper insulating member, and the end of the second section away from the first section extends toward the radial inner side of the first avoidance hole.

6. The top cover assembly of the battery according to claim 5, characterized in that: An end of the second section facing away from the first section is spaced apart from an outer peripheral wall of the pole.

7. The top cover assembly of the battery according to claim 1, characterized in that: The bending portion is provided with a plurality of cutouts, and the plurality of cutouts are arranged at intervals in a circumferential direction of the bending portion.

8. The top cover assembly of the battery according to claim 1, characterized in that: The top cover patch is an integral piece; And / or, the cover body is provided with an explosion-proof valve, and the flat portion is provided with a second avoidance hole for avoiding the explosion-proof valve; And / or, there are two spaced-apart poles, and there are two corresponding mounting holes, two corresponding first avoidance holes, and two corresponding bending portions.

9. A battery cell, characterized in that: A top cover assembly comprising a battery according to any one of claims 1-8.

10. A battery pack, characterized in that: The battery cell according to claim 9 is included, wherein there are multiple battery cells, and the poles of two adjacent battery cells are electrically connected through a bar.

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