CN217507594U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN217507594U CN217507594U CN202220674427.XU CN202220674427U CN217507594U CN 217507594 U CN217507594 U CN 217507594U CN 202220674427 U CN202220674427 U CN 202220674427U CN 217507594 U CN217507594 U CN 217507594U
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- CN
- China
- Prior art keywords
- battery
- cover
- sealing
- cell
- end cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 20
- 239000003792 electrolyte Substances 0.000 description 5
- 210000005056 cell body Anatomy 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a battery, which comprises a shell, an electric core and at least one end cover, wherein the electric core is arranged in the shell, and the end cover is arranged at one end or two ends of the shell; the end cover comprises a cover body and a sealing part, and the sealing part is arranged on the cover body; keep away from in the sealing be provided with utmost point ear connecting portion on the one side of lid, utmost point ear connecting portion keep away from be provided with at least one spread groove on the one side of sealing, the end cover pass through the spread groove with electric core is connected. By adopting the end cover and the end cover assembly, the battery structure and the assembly process of the battery are simplified, and the production efficiency and the reliability of the battery are improved.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to battery.
Background
Under the background that the global ecological environment problem and the petroleum energy crisis problem are increasingly severe at present, the development of new energy automobiles becomes a necessary trend of the automobile industry, and under the aim of 'double carbon', the green and low carbon performance of the manufacturing link is strengthened, so that the emission reduction capability of the new energy automobile industry is further amplified. The cylindrical power battery is one of the most widely applied power batteries at present, and the common cylindrical power batteries have three specifications of 18650, 21700 and 32131, and are widely applied to the field of new energy automobiles due to the advantages of higher capacity, higher output voltage, good charge-discharge cycle performance, stable output voltage, capability of large-current discharge, stable electrochemical performance, safe use, wide working temperature range, environmental friendliness and the like.
As an important component of a new energy automobile, the technical level of a cylindrical power battery profoundly influences the development of the new energy automobile industry. However, the existing cylindrical battery mainly comprises a positive electrode, a negative electrode, a diaphragm, a positive collector, a negative collector, a safety valve, an overcurrent protection device, an insulating part and a shell, and the following problems mainly exist: the end cover has complex structure, more parts and high manufacturing cost; the manufacturing process is complex, and multiple laser welding and riveting are needed; the utilization rate of the internal space of the battery is low, and the like, and becomes one of the technical points needing breakthrough.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery can simplify the end cover structure. The utility model discloses realize by following technical scheme:
a battery comprising a casing, a cell mounted in the casing and at least one end cap mounted at one or both ends of the casing; the end cover is characterized by comprising a cover body and a sealing part, wherein the sealing part is arranged on the cover body; keep away from in the sealing be provided with utmost point ear connecting portion in the one side of lid, utmost point ear connecting portion keep away from be provided with at least one spread groove in the one side of sealing, the end cover pass through the spread groove with electric core is connected.
Among the above-mentioned technical scheme, through set up on the utmost point ear connecting portion the spread groove can enough realize being connected with the utmost point ear of electric core, reduces the connection degree of difficulty, improves the connection reliability, can utilize again the flow of spread groove direction electrolyte improves the infiltration effect of electrolyte to electric core, full play battery performance.
As a further improvement of the present invention, the battery cell includes a battery cell body, a positive electrode tab and a negative electrode tab, the positive electrode tab and the negative electrode tab respectively connect with the battery cell body, the whole or part of the positive electrode tab and/or the negative electrode tab is embedded into the connecting groove.
As a further improvement of the utility model, the depth of the connecting groove is 0.5mm-3 mm.
As a further improvement, when the connecting grooves are multiple, they are connected to each other.
As a further improvement of the utility model, an explosion-proof valve is arranged on the end cover.
As a further improvement of the utility model, the explosion-proof valve is a blind hole which is recessed from the sealing part to the cover body; and/or
The thickness of the explosion-proof valve is smaller than the sum of the thicknesses of the cover body and the sealing part.
As a further improvement, the utility model also comprises an end cover sealing ring, the end cover sealing ring is arranged on the outer side surface of the sealing part of the end cover.
As a further improvement of the present invention, the end cap sealing ring includes a plane portion abutting against the cover body and the housing, respectively, and a protruding portion protruding outward from the plane portion; the bulge is arranged on the outer side surface of the sealing part in a surrounding mode.
As a further improvement of the present invention, the top surface of the projection is flush with the bottom surface of the seal portion.
As a further improvement, the utility model also includes liquid injection handhole door and handhole door sealing washer, be provided with on the end cover with running through and annotate the liquid hole, it installs to annotate the liquid hole lid keep away from on the notes liquid hole of end cover the one end of electric core, the handhole door sealing washer sets up annotate the liquid hole and annotate between the liquid hole lid.
As a further improvement of the present invention, the battery further includes a battery cell protection adhesive tape between the battery cell and the casing.
As a further improvement of the present invention, the width of the cell protection adhesive tape is greater than or equal to the height of the cell, and/or
The length of the battery cell protective gummed paper is greater than or equal to the circumferential length of the battery cell.
The connecting grooves are arranged on the lug connecting part of the end cover, so that the lugs are embedded into the connecting grooves during assembly, the connecting reliability is improved, the welding step is simplified, and the contact area with the lugs and the guiding performance to electrolyte are improved by connecting a plurality of connecting grooves into a net; the explosion-proof valve can be broken down in case of emergency, so that the explosion danger of the battery is avoided; annotate the liquid hole and can annotate the liquid after the battery assembly is accomplished, reduced and annotated the liquid degree of difficulty.
Drawings
Fig. 1 is a perspective view of an end cap according to a first embodiment of the present invention.
Fig. 2 is a perspective view of an end cover according to a second embodiment of the present invention.
Fig. 3 is an exploded view of an end cap assembly according to a fourth embodiment of the present invention.
Fig. 4 is an exploded view of an end cover assembly according to a fifth embodiment of the present invention.
Fig. 5 is an exploded view of a battery according to a sixth embodiment of the present invention.
Fig. 6 is a cross-sectional view of a positive electrode-a negative electrode of a battery according to an embodiment of the present invention.
Fig. 7 is a partially enlarged view of a portion a in fig. 5.
Fig. 8 is a partially enlarged view of a portion B in fig. 5.
Fig. 9 is a partially enlarged view of a portion C in fig. 5.
Fig. 10 is a partially enlarged view of a portion D in fig. 5.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings, wherein for convenience of description, the upper, lower, left, right, front, rear, and other orientations may be defined in the present application, and the present application is intended to clearly describe the relative position relationship of the structures, and is not intended to limit the actual orientation of the product during the manufacturing, using, selling, and the like. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
example one
Referring to fig. 1 and 2, the present embodiment provides a battery end cap 10, which is an end cap of a cylindrical power battery, and includes a cap body 11 and a sealing portion 12, where the cap body 11 is formed by coaxially stacking one or more cylinders, the sealing portion 12 is disposed on one surface of the cap body 11, the sealing portion 12 is a cylinder and is coaxially disposed with the cap body 11, and a diameter of the sealing portion 12 is smaller than a diameter of one surface of the cap body connected thereto. Keep away from on the sealing 12 the one side of lid 11 is provided with utmost point ear connecting portion 13, utmost point ear connecting portion 13 with the coaxial setting of sealing 12 utmost point ear connecting portion 13 is kept away from be provided with a plurality of (at least one) spread groove 131 on the one side of sealing 12. The connecting grooves 131 are linear (or other shapes can be set), the depth is 0.5mm-3mm, and the connecting grooves 131 are communicated with each other and are connected in a net shape and arranged on the tab connecting part 13.
Example two
Referring to fig. 1, the present embodiment provides a battery end cap 10, which further includes an explosion-proof valve 14 on the basis of the first embodiment, where the explosion-proof valve 14 is disposed on the cover 11 and the sealing portion 12 and is a blind hole recessed from the sealing portion 12 to the cover 11, that is, the thickness of the explosion-proof valve 14 is smaller than the sum of the thicknesses of the cover 11 and the sealing portion 12.
EXAMPLE III
Referring to fig. 2, the present embodiment provides a battery end cap 10, which further includes a liquid injection hole 15 based on the first embodiment, wherein the liquid injection hole 15 is a stepped hole, is disposed through the cover 11, the sealing portion 12 and the tab connecting portion 13 in a manner that the diameter thereof is larger at the top and smaller at the bottom (the end of the cover 11 is the top, and the end of the tab connecting portion 13 is the bottom), and is disposed coaxially with the cover 11, the sealing portion 12 and the tab connecting portion 13.
As an achievable solution, the end cap of this embodiment may further include an explosion-proof valve 14 on the end cap of the second embodiment.
Example four
Referring to fig. 3 and fig. 6, the present embodiment provides an end cap assembly, including an end cap 10 and an end cap sealing ring 21 provided in the first or second embodiment, where the end cap sealing ring 21 includes a planar portion abutting against the cover 11 and the battery case, and a protruding portion protruding outward from the planar portion; the protruding portion is arranged on the outer side surface of the sealing portion 12 in a surrounding manner (that is, the cross-sectional shape of the end cap sealing ring 21 is "L" shaped), and the top surface of the protruding portion is flush with the bottom surface (the surface close to the battery cell) of the sealing portion 12.
EXAMPLE five
Referring to fig. 4, 6 and 7, the present embodiment provides an end cap assembly, including an end cap 10, an end cap sealing ring 21, a liquid injection hole cap 22 and a hole cap sealing ring 23 provided in the third embodiment, where the end cap sealing ring 21 includes a planar portion abutting against the cover body 11 and the battery case, and a protruding portion protruding outward from the planar portion; the protruding portion is arranged on the outer side surface of the sealing portion 12 in a surrounding manner (that is, the cross-sectional shape of the end cap sealing ring 21 is "L" shaped), and the top surface of the protruding portion is flush with the bottom surface (the surface close to the battery cell) of the sealing portion 12. The liquid injection hole cover 22 is installed on the liquid injection hole 15 of the end cover 10 and located on one side far away from the tab connection part 13, that is, the end with the larger diameter of the stepped hole, and the hole cover sealing ring 23 is arranged between the liquid injection hole 15 and the liquid injection hole cover 22 (specifically, the hole cover sealing ring 23 is located between the bottom wall surface of the end with the larger diameter of the liquid injection hole 15 and the bottom surface of the liquid injection hole cover 22).
EXAMPLE six
Referring to fig. 5 to fig. 10, the present embodiment provides a battery, which includes a casing 31, a cell body 32, a positive tab 33, a negative tab 34, a cell protection adhesive tape 35, and an end cap assembly provided in the fourth or fifth embodiments. The shell 31 is cylindrical with two open ends; the positive tab 33 and the negative tab 34 are made of conductive materials and are respectively connected to the positive plate and the negative plate of the battery cell body 32 to form a battery cell; the width of the cell protection adhesive paper 35 is greater than or equal to the height of the cell, and/or the length is greater than or equal to the circumferential length of the cell; the battery cell is installed in the shell 31, and the battery cell protective adhesive paper 35 is arranged between the battery cell and the shell 31 and coated on the outer peripheral surface of the battery cell. The end cap assemblies are respectively installed at two ends of the shell 31, one end provided with the connecting groove 131 faces the inside of the shell 31, the positive electrode tab 33 and the negative electrode tab 34 are deformed by pressing the end cap assemblies and are completely or partially embedded into the connecting groove 131, and the depth of the positive electrode tab 33, the negative electrode tab 34 and the negative electrode tab 34 embedded into the connecting groove 131 is less than or equal to one half of the depth of the connecting groove 131.
The connecting grooves are formed in the lug connecting part of the end cover, so that a lug is embedded into the connecting grooves during assembly, the connecting reliability is improved, the welding step is simplified, the connecting grooves are connected into a net and the embedding depth of the lug is increased, the contact area of the lug and the electrolyte guiding performance is improved, and meanwhile the electrolyte guiding performance is guaranteed; the explosion-proof valve can be broken down in case of emergency, so that the explosion danger of the battery is avoided; annotate the liquid hole and can annotate the liquid after the battery assembly is accomplished, reduced and annotated the liquid degree of difficulty.
EXAMPLE seven
The present embodiment provides a battery, which is different from the sixth embodiment in that: the end cap assembly provided in the fourth or fifth embodiment is only included, the housing 31 is a cylinder with an open end, the end cap assembly is installed at one end of the housing 31, and the end provided with the connecting groove 131 faces the inside of the housing 31, all or part of the positive tab 33 is embedded into the connecting groove 131, and the negative tab 34 is welded on the inner bottom surface of the housing 31 (as another technical solution, the positive tab 33 is connected with the inner bottom surface of the housing 31, the end cap assembly is connected with the negative tab 34, and all or part of the negative tab 34 is embedded into the connecting groove 131).
Example eight
The present embodiment provides a battery, which is different from the sixth embodiment in that: the end cap assembly is arranged at one end of the shell 31, and faces the inside of the shell 31 at one end provided with the connecting groove 131, and all or part of the positive lug 33 is embedded in the connecting groove 131; the common end cap is installed at the other end of the housing 31, and the negative electrode tab 34 is welded on the common end cap (as another technical solution, the positive electrode tab 33 is connected with the common end cap, the end cap assembly is connected with the negative electrode tab 34, and all or part of the negative electrode tab 34 is embedded in the connecting groove 131).
The above embodiments are merely for full disclosure and not for limitation, and all changes that can be made without inventive step based on the inventive idea of the present invention and equivalent technical features can be obtained without any inventive step should be considered as the scope of the present disclosure.
Claims (12)
1. A battery comprising a casing, a cell mounted in the casing and at least one end cap mounted at one or both ends of the casing; the end cover is characterized by comprising a cover body and a sealing part, wherein the sealing part is arranged on the cover body; keep away from in the sealing be provided with utmost point ear connecting portion in the one side of lid, utmost point ear connecting portion keep away from be provided with at least one spread groove in the one side of sealing, the end cover pass through the spread groove with electric core is connected.
2. The battery of claim 1, wherein the battery core comprises a battery core body, a positive tab and a negative tab, the positive tab and the negative tab are respectively connected to the battery core body, and all or part of the positive tab and/or the negative tab is embedded in the connection groove.
3. The battery of claim 1, wherein the connecting grooves have a depth of 0.5mm to 3 mm.
4. The battery according to claim 1, wherein when the connecting groove is plural, the plural connecting grooves are communicated with each other.
5. The battery of claim 1, wherein the end cap is provided with an explosion-proof valve.
6. The battery according to claim 5,
the explosion-proof valve is a blind hole which is recessed inwards from the sealing part to the cover body; and/or
The thickness of the explosion-proof valve is smaller than the sum of the thicknesses of the cover body and the sealing part.
7. The battery of claim 1, further comprising an end cap seal ring disposed on an exterior side of the sealing portion of the end cap.
8. The battery according to claim 7,
the end cover sealing ring comprises a plane part which is respectively abutted against the cover body and the shell and a convex part which is formed by protruding outwards from the plane part; the bulge is arranged on the outer side surface of the sealing part in a surrounding mode.
9. The battery of claim 8, a top surface of the raised portion being flush with a bottom surface of the sealing portion.
10. The battery of claim 1, further comprising a liquid injection hole cover and a hole cover sealing ring, wherein the end cover is provided with a liquid injection hole therethrough, the liquid injection hole cover is mounted on an end of the liquid injection hole of the end cover far away from the battery core, and the hole cover sealing ring is positioned between the liquid injection hole and the liquid injection hole cover.
11. The battery of any of claims 1-10, further comprising a cell protective tape disposed between the cell and the housing.
12. The battery of claim 11, wherein the width of the cell protective tape is greater than or equal to the height of the cell, and/or
The length of the battery cell protective gummed paper is greater than or equal to the circumferential length of the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674427.XU CN217507594U (en) | 2022-03-25 | 2022-03-25 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220674427.XU CN217507594U (en) | 2022-03-25 | 2022-03-25 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217507594U true CN217507594U (en) | 2022-09-27 |
Family
ID=83347604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220674427.XU Active CN217507594U (en) | 2022-03-25 | 2022-03-25 | Battery with a battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217507594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024085733A1 (en) * | 2022-10-21 | 2024-04-25 | 주식회사 엘지에너지솔루션 | Cylindrical battery cell, and battery pack and vehicle including same |
-
2022
- 2022-03-25 CN CN202220674427.XU patent/CN217507594U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024085733A1 (en) * | 2022-10-21 | 2024-04-25 | 주식회사 엘지에너지솔루션 | Cylindrical battery cell, and battery pack and vehicle including same |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |