CN219779158U - Pole-free battery core shell structure - Google Patents
Pole-free battery core shell structure Download PDFInfo
- Publication number
- CN219779158U CN219779158U CN202320620584.7U CN202320620584U CN219779158U CN 219779158 U CN219779158 U CN 219779158U CN 202320620584 U CN202320620584 U CN 202320620584U CN 219779158 U CN219779158 U CN 219779158U
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- CN
- China
- Prior art keywords
- cover plate
- electrode cover
- plate body
- positive electrode
- metal ring
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- 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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- 239000011258 core-shell material Substances 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 54
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 6
- 239000002985 plastic film Substances 0.000 description 4
- 238000005219 brazing Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The embodiment of the utility model provides a battery cell shell structure without a pole, which is suitable for a battery cell and comprises a positive electrode cover plate, a negative electrode cover plate and a shell, wherein the positive electrode cover plate is arranged on the end face of one end of the shell, and the negative electrode cover plate is arranged on the end face of the other end of the shell; the positive electrode cover plate comprises a positive electrode cover plate body, a first insulating ring and a first metal ring, wherein the first insulating ring is arranged on the periphery of the positive electrode cover plate body in a surrounding manner, the first metal ring is arranged on the periphery of the first insulating ring in a surrounding manner, and the first insulating ring is respectively in abutting connection with the positive electrode cover plate body and the first metal ring; the first metal ring is in abutting connection with the shell. The utility model has simple structure, and can effectively simplify the structure of the cover plate and reduce the volume of the cover plate by taking the whole positive electrode cover plate body as a positive electrode post and taking the whole negative electrode cover plate body as a negative electrode post, thereby effectively improving the reliability, the energy density and the overcurrent capacity of the battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery cell shell structure without a polar column.
Background
The power battery is a main new energy battery, and can be divided into a cylindrical battery and a square battery according to the shape and the size of the battery, wherein: the cylindrical battery production technology is mature, the standardization level is high, full-automatic production is easy to realize, single batteries are small, the heat dissipation area after grouping is large, the heat dissipation performance is superior to that of square batteries, but the number of the batteries after grouping is large, so that the control cost of single batteries is high, and the overall weight is relatively high.
Compared with a cylindrical battery, the square battery has higher plasticity, can be used for customizing the size, and is particularly suitable for being applied to the directions of new energy automobiles and energy storage base stations. At present, the cover plate of the conventional square battery mainly comprises a pole, a top cover plate, lower plastic, upper plastic, a sealing ring, a connecting sheet and other components, and has the advantages of more cover plate parts, complex structure, poor reliability and difficulty in meeting the requirements of actual use.
Disclosure of Invention
Based on the above, the embodiment of the utility model provides a shell structure of a battery cell without a polar column, which aims to solve the problems that the existing square battery has more cover plate parts, complex structure, poor reliability, difficulty in meeting the actual use requirement and the like.
In order to achieve the above objective, an embodiment of the present utility model provides a battery cell housing structure without a pole, which is suitable for a battery cell, and includes a positive electrode cover plate, a negative electrode cover plate and a housing, wherein the positive electrode cover plate is disposed on an end face of one end of the housing, and the negative electrode cover plate is disposed on an end face of the other end of the housing;
the positive electrode cover plate comprises a positive electrode cover plate body, a first insulating ring and a first metal ring, wherein the first insulating ring is arranged on the periphery of the positive electrode cover plate body in a surrounding manner, the first metal ring is arranged on the periphery of the first insulating ring in a surrounding manner, and the first insulating ring is respectively in abutting connection with the positive electrode cover plate body and the first metal ring; the first metal ring is in abutting connection with the shell.
As a preferred embodiment, the negative electrode cover plate includes a negative electrode cover plate body, a second insulating ring and a second metal ring, the second insulating ring is annularly arranged on the periphery of the negative electrode cover plate body, the second metal ring is annularly arranged on the periphery of the second insulating ring, and the second insulating ring is respectively in abutting connection with the negative electrode cover plate body and the second metal ring; the second metal ring is in abutting connection with the shell.
As a preferred embodiment, the positive electrode cover plate body is provided with an explosion-proof valve hole, or the shell is provided with an explosion-proof valve hole.
In a preferred embodiment, the negative electrode cover plate body is provided with a liquid injection hole, or the casing is provided with a liquid injection hole.
As a preferred embodiment, the first insulating ring is welded to the positive electrode cover plate body and the first metal ring, respectively; the first metal ring is welded with the shell;
the second insulating ring is respectively connected with the negative electrode cover plate body and the second metal ring in a welding way; the second metal ring is welded with the shell.
As a preferred implementation mode, the battery cell is arranged in the shell, the positive electrode lug of the battery cell is welded with the positive electrode cover plate body, and the negative electrode lug of the battery cell is welded with the negative electrode cover plate body.
As a preferred embodiment, the thickness of the first metal ring is the same as the thickness of the edge of the housing; the thickness of the second metal ring is the same as the thickness of the edge of the shell.
As a preferable embodiment, the thickness of the positive electrode cover plate body is 0.5 mm-3.0 mm; the thickness of the negative electrode cover plate body is 0.5-3.0 mm.
As a preferred embodiment, the positive electrode cap plate and the negative electrode cap plate are square cap plates or cylindrical cap plates.
As a preferred embodiment, the positive electrode cover plate body is an aluminum cover plate or a stainless steel cover plate;
the negative electrode cover plate body is a copper-aluminum composite material cover plate; and the aluminum part of the copper-aluminum composite material cover plate is welded with the second insulating ring. The first insulating ring and the second insulating ring are ceramic rings;
the first metal ring and the second metal ring are aluminum rings or stainless steel rings;
the shell is an aluminum shell.
In a preferred embodiment, the battery cell is a lithium battery cell, a sodium battery cell or an energy storage battery cell.
In the embodiment of the utility model, the welding can be realized by brazing, friction welding, a solid-phase connection method or the like.
The utility model uses the whole positive electrode cover plate body as the positive electrode post and the whole negative electrode cover plate body as the negative electrode post, so that parts such as the post, the lower plastic sheet, the upper plastic sheet and the like (fewer parts, fewer cover plates due to the failure of the parts and higher reliability) can be omitted, the structure of the cover plate is effectively simplified, and meanwhile, the size of the cover plate is effectively reduced because the post is not required, so that the energy density of the battery is effectively improved. And the whole cover plate body is used as a pole to transmit current, the cross section area of the cover plate body is larger than that of a conventional pole, and the length of the cover plate body is smaller than that of the conventional pole, so that the cover plate body is smaller in resistance and higher in overcurrent capacity. The utility model has simple structure and strong practicability, and can be suitable for large-scale production.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic longitudinal sectional view of a housing structure of a battery cell with no electrode according to an embodiment of the present utility model;
fig. 2 is a schematic structural view of a positive cover plate of the housing structure of the battery cell without the pole of fig. 1;
fig. 3 is a schematic view of a longitudinal cross-sectional structure of the positive electrode cap plate of fig. 2;
fig. 4 is a schematic structural view of a negative electrode cover plate of the battery cell housing structure without the electrode post of fig. 1;
fig. 5 is a schematic view of a longitudinal sectional structure of the negative electrode cap plate of fig. 4.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the embodiments.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described in the following embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Specifically, to achieve the above objective, as shown in fig. 1 to 3, an embodiment of the present utility model provides a battery cell housing structure without a pole, which is suitable for a battery cell 100, and includes a positive electrode cover plate 10, a negative electrode cover plate 20 and a housing 30, wherein the positive electrode cover plate 10 is disposed on an end face of one end of the housing 30, and the negative electrode cover plate 20 is disposed on an end face of the other end of the housing 30;
the positive electrode cover plate 10 comprises a positive electrode cover plate body 11, a first insulating ring 12 and a first metal ring 13, wherein the first insulating ring 12 is annularly arranged on the periphery of the positive electrode cover plate body 11, the first metal ring 13 is annularly arranged on the periphery of the first insulating ring 12, and the first insulating ring 12 is respectively in abutting connection with the positive electrode cover plate body 11 and the first metal ring 13; the first metal ring 13 is connected to the housing 30 in an abutting manner.
As shown in fig. 4 to 5, as a preferred embodiment, the anode cover 20 includes an anode cover body 21, a second insulating ring 22, and a second metal ring 23, wherein the second insulating ring 22 is provided around the periphery of the anode cover body 21, the second metal ring 23 is provided around the periphery of the second insulating ring 22, and the second insulating ring 22 is in abutting connection with the anode cover body 21 and the second metal ring 23, respectively; the second metal ring 23 is connected to the housing 30 in an abutting manner.
As a preferred embodiment, the positive electrode cap body 11 is provided with an explosion-proof valve hole 40, or the case 30 is provided with an explosion-proof valve hole 40.
In a preferred embodiment, the negative electrode cap body 21 is provided with a liquid injection hole 50, or the case 30 is provided with a liquid injection hole 50.
As a preferred embodiment, the first insulating ring 12 is welded to the positive electrode cover plate body 11 and the first metal ring 13, respectively; the first metal ring 13 is welded with the shell 30;
the second insulating ring 22 is welded with the negative electrode cover plate body 21 and the second metal ring 23 respectively; the second metal ring 23 is welded to the housing 30.
As a preferred embodiment, the battery cell 100 is disposed in the housing 30, the positive electrode tab 101 of the battery cell 100 is welded to the positive electrode cover body 11, and the negative electrode tab 102 of the battery cell 100 is welded to the negative electrode cover body 21.
As a preferred embodiment, the thickness of the first metal ring 13 is the same as the thickness of the edge of the housing 30; the thickness of the second metal ring 23 is the same as the thickness of the edge of the housing 30. Thus, the reliability of the shell connection can be ensured, and the stability of the shell connection can be ensured.
As a preferable embodiment, the thickness of the positive electrode cover plate body 11 is 0.5mm to 3.0mm; the thickness of the negative electrode cover plate body 21 is 0.5 mm-3.0 mm. The thickness of the cover plate body can be set according to actual needs.
As a preferred embodiment, the positive electrode cap plate 10 and the negative electrode cap plate 20 are square cap plates or cylindrical cap plates. In the present embodiment, the positive electrode cap plate 10 and the negative electrode cap plate 20 are both square cap plates.
As a preferred embodiment, the positive electrode cover plate body 11 is an aluminum cover plate or a stainless steel cover plate; in this embodiment, the positive electrode cap body 11 is an aluminum cap.
The negative electrode cover plate body 21 is a copper-aluminum composite material cover plate; the aluminum part of the copper-aluminum composite material cover plate is welded with the second insulating ring 22;
the first insulating ring 12 and the second insulating ring 22 are ceramic rings;
the first metal ring 13 and the second metal ring 23 are aluminum rings or stainless steel rings; in the present embodiment, the first metal ring 13 and the second metal ring 23 are both aluminum rings;
the housing 30 is an aluminum housing.
In a preferred embodiment, the battery cell 100 is a lithium battery cell, a sodium battery cell, or an energy storage battery cell.
In the embodiment of the utility model, the welding can be realized by brazing, friction welding, a solid-phase connection method or the like.
The utility model uses the whole positive electrode cover plate body as the positive electrode post and the whole negative electrode cover plate body as the negative electrode post, so that parts such as the post, the lower plastic sheet, the upper plastic sheet and the like (fewer parts, fewer cover plates due to the failure of the parts and higher reliability) can be omitted, the structure of the cover plate is effectively simplified, and meanwhile, the size of the cover plate is effectively reduced because the post is not required, so that the energy density of the battery is effectively improved. And the whole cover plate body is used as a pole to transmit current, the cross section area of the cover plate body is larger than that of a conventional pole, and the length of the cover plate body is smaller than that of the conventional pole, so that the cover plate body is smaller in resistance and higher in overcurrent capacity. The utility model has simple structure and strong practicability, and can be suitable for large-scale production.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The battery cell shell structure without the polar column is characterized by being suitable for a battery cell and comprising a positive electrode cover plate, a negative electrode cover plate and a shell, wherein the positive electrode cover plate is arranged on the end face of one end of the shell, and the negative electrode cover plate is arranged on the end face of the other end of the shell;
the positive electrode cover plate comprises a positive electrode cover plate body, a first insulating ring and a first metal ring, wherein the first insulating ring is arranged on the periphery of the positive electrode cover plate body in a surrounding manner, the first metal ring is arranged on the periphery of the first insulating ring in a surrounding manner, and the first insulating ring is respectively in abutting connection with the positive electrode cover plate body and the first metal ring; the first metal ring is in abutting connection with the shell.
2. The battery cell casing structure without the pole according to claim 1, wherein the negative electrode cover plate comprises a negative electrode cover plate body, a second insulating ring and a second metal ring, the second insulating ring is arranged on the periphery of the negative electrode cover plate body, the second metal ring is arranged on the periphery of the second insulating ring, and the second insulating ring is respectively connected with the negative electrode cover plate body and the second metal ring in an abutting mode; the second metal ring is in abutting connection with the shell.
3. The non-terminal cell housing structure according to claim 1, wherein the positive electrode cap plate body is provided with an explosion-proof valve hole, or the housing is provided with an explosion-proof valve hole.
4. The battery cell casing structure according to claim 2, wherein the negative electrode cover plate body is provided with a liquid injection hole, or the casing is provided with a liquid injection hole.
5. The electrodeless cell housing structure as claimed in claim 2, wherein the first insulating ring is welded with the anode cover body and the first metal ring, respectively; the first metal ring is welded with the shell;
the second insulating ring is respectively connected with the negative electrode cover plate body and the second metal ring in a welding way; the second metal ring is welded with the shell.
6. The battery cell casing structure of claim 2, wherein the battery cell is disposed in the casing, a positive electrode tab of the battery cell is welded with the positive electrode cover plate body, and a negative electrode tab of the battery cell is welded with the negative electrode cover plate body.
7. The electrodeless cell housing structure as recited in claim 2, wherein the thickness of the first metal ring is the same as the thickness of the edge of the housing; the thickness of the second metal ring is the same as the thickness of the edge of the shell.
8. The battery cell casing structure without the pole according to claim 2, wherein the thickness of the positive electrode cover plate body is 0.5 mm-3.0 mm; the thickness of the negative electrode cover plate body is 0.5-3.0 mm.
9. The non-terminal cell housing structure of claim 2, wherein the positive and negative electrode covers are square or cylindrical covers.
10. The electrodeless cell housing structure as recited in claim 1, wherein the positive electrode cover body is an aluminum cover or a stainless steel cover;
the negative electrode cover plate body is a copper-aluminum composite material cover plate; the aluminum part of the copper-aluminum composite material cover plate is welded with the second insulating ring;
the first insulating ring and the second insulating ring are ceramic rings;
the first metal ring and the second metal ring are aluminum rings or stainless steel rings;
the shell is an aluminum shell;
the battery cell is a lithium battery cell, a sodium battery cell or an energy storage battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620584.7U CN219779158U (en) | 2023-03-27 | 2023-03-27 | Pole-free battery core shell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320620584.7U CN219779158U (en) | 2023-03-27 | 2023-03-27 | Pole-free battery core shell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219779158U true CN219779158U (en) | 2023-09-29 |
Family
ID=88106174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320620584.7U Active CN219779158U (en) | 2023-03-27 | 2023-03-27 | Pole-free battery core shell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219779158U (en) |
-
2023
- 2023-03-27 CN CN202320620584.7U patent/CN219779158U/en active Active
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