CN114361661A - Square shell battery cell and battery module - Google Patents
Square shell battery cell and battery module Download PDFInfo
- Publication number
- CN114361661A CN114361661A CN202110559026.XA CN202110559026A CN114361661A CN 114361661 A CN114361661 A CN 114361661A CN 202110559026 A CN202110559026 A CN 202110559026A CN 114361661 A CN114361661 A CN 114361661A
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- Prior art keywords
- electrode
- square
- shell
- contact
- conductive
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000011888 foil Substances 0.000 claims description 28
- 239000007774 positive electrode material Substances 0.000 claims description 10
- 239000007773 negative electrode material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses square shell electricity core and battery module, wherein, square shell electricity core includes: a square metal casing having a top cover as a first conductive electrode and a lower casing as a second conductive electrode; the top cover and the lower shell are in insulated connection through the insulating assembly; and the electrode plate assembly is arranged in the square metal shell, one of the positive plate and the negative plate of the electrode plate assembly is in contact with the first conductive electrode, and the other of the positive plate and the negative plate is in contact with the second conductive electrode. The top cover of the square metal shell of the square shell battery cell is directly used as a first conductive electrode, the lower shell is directly used as a second conductive electrode, one of the positive plate and the negative plate of the electrode plate component inside the lower shell is directly contacted with the top cover to be conductive, the other one is directly contacted with the lower shell to be conductive, the wire outlet end of a certain electrode plate is saved, parts such as a lug and a busbar are not required to be arranged, the structure is simplified, the reliability is improved, the cost is reduced, and the volume grouping efficiency is improved.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a square-shell battery cell. The invention also relates to a battery module comprising the square-shell battery cell.
Background
With the increasing severity of energy and environmental problems, countries around the world have increased the research and development efforts on new energy vehicles. The power battery is an important component of the electric vehicle, and the research on the power battery is imperative.
The square shell lithium cell is one kind of power battery, and the positive negative pole of current square shell lithium cell needs to weld with the pole piece in the casing is inside, need weld with the busbar or spiro union at the casing outside, leads to the square shell lithium cell to become in groups the back, and volumetric specific energy has great decay, and the reliability reduces. When the series-parallel connection is carried out, a series of parts such as busbars and carriers are needed, the types of the auxiliary materials of the modules are increased, the cost is improved, the process complexity is increased, and the volume grouping efficiency is further reduced.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a square-casing electrical core, so as to improve reliability, reduce cost and simplify structure.
Another objective of the present invention is to provide a battery module including the square-casing electric core, so as to simplify the structure, reduce the cost, and improve the reliability.
In order to achieve the purpose, the invention provides the following technical scheme:
a square-shelled electrical cell comprising:
a square metal casing having a top cover as a first conductive electrode and a lower case as a second conductive electrode;
the top cover and the lower shell are in insulated connection through the insulating assembly;
the electrode plate assembly is arranged in the square metal shell, one of a positive plate and a negative plate of the electrode plate assembly is in contact with the first conductive electrode, and the other of the positive plate and the negative plate is in contact with the second conductive electrode.
Preferably, in the above square-casing electric core, the electrode sheet assembly includes a plurality of positive electrode sheets, a plurality of negative electrode sheets, and a plurality of separators, the positive electrode sheets and the negative electrode sheets are alternately stacked, and the separators are disposed between the adjacent positive electrode sheets and the adjacent negative electrode sheets, a portion of the positive electrode sheets, which exposes the stacked layers, is a first contact conductive end, a portion of the negative electrode sheets, which exposes the stacked layers, is a second contact conductive end, one of the first contact conductive end and the second contact conductive end is in contact with the first conductive electrode, and the other is in contact with the second conductive electrode.
Preferably, in the above square-shell battery cell, the positive electrode plate includes:
a positive electrode foil layer;
the positive electrode comprises a positive electrode active material layer, wherein the positive electrode active material layer is coated on both sides of the positive electrode foil layer, and the positive electrode active material layer is not coated on the first contact conductive end part of the positive electrode foil layer.
Preferably, in the square-shell battery cell, the positive electrode foil layer is an aluminum foil layer.
Preferably, in the square-casing battery cell described above, the negative electrode sheet includes:
a negative electrode foil layer;
and the two sides of the negative electrode foil layer are coated with the negative electrode active material layer, and the second contact conductive end part of the negative electrode foil layer is not coated with the negative electrode active material layer.
Preferably, in the square-shell battery cell, the negative electrode foil layer is a copper foil layer.
Preferably, in the above square-shelled battery cell, the insulation assembly includes:
the insulating part is of a hollow structure, and the top cover covers one end, far away from the lower shell, of the insulating part;
and the metal part is arranged on the peripheral edge of the insulating part and is in sealing connection with one end, close to the top cover, of the lower shell.
The invention also provides a battery module, which comprises the battery cell and is characterized in that the battery cell is the square-shell battery cell.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a square-shell battery cell, which comprises a square metal shell, an insulation assembly and an electrode plate assembly, wherein the square metal shell is provided with a top cover and a lower shell, the top cover is used as a first conductive electrode, and the lower shell is used as a second conductive electrode; the top cover is in insulated connection with the lower shell through the insulating assembly; the electrode plate assembly is arranged in the square metal shell, one of the positive plate and the negative plate of the electrode plate assembly is in contact with the top cover serving as the first conductive electrode, and the other of the positive plate and the negative plate is in contact with the lower shell serving as the second conductive electrode. The top cover of the square metal shell of the square shell battery cell is directly used as a first conductive electrode, the lower shell is directly used as a second conductive electrode, one of the positive plate and the negative plate of the electrode plate component inside the lower shell is directly contacted with the top cover to be conductive, the other one is directly contacted with the lower shell to be conductive, the wire outlet end of a certain electrode plate is saved, parts such as a lug and a busbar are not required to be arranged, the structure is simplified, the reliability is improved, the cost is reduced, and the volume grouping efficiency is improved.
The battery module provided by the invention adopts the square-shell battery cell in the application, so that a wire outlet end of a certain electrode plate is omitted, parts such as a lug and a bus bar are not required to be arranged, the structure is simplified, the reliability is improved, the cost is reduced, and the volume grouping efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a square-shell battery cell according to an embodiment of the present invention;
fig. 2 is an exploded view of the square-shell battery cell of fig. 1;
fig. 3 is a schematic structural diagram of an electrode plate assembly of a square-shell battery cell according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a positive plate or a negative plate according to an embodiment of the present invention.
Wherein 1 is a square metal case, 11 is a top cover, 12 is a lower case, 2 is an insulating assembly, 21 is an insulating part, 22 is a metal part, 3 is an electrode sheet assembly, 31 is a positive electrode sheet, 311 is a positive electrode foil layer, 312 is a positive electrode active material layer, 32 is a negative electrode sheet, and 33 is a separator.
Detailed Description
The core of the invention is to provide a square-shell battery cell, which improves the reliability, reduces the cost and simplifies the structure.
The invention also provides a battery module comprising the square-shell battery cell, so that the structure is simplified, the cost is reduced, and the reliability is improved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides a square-casing electrical core, including a square-metal casing 1, an insulating assembly 2, and an electrode plate assembly 3, where the square-metal casing 1 has a top cover 11 and a lower casing 12, the top cover 11 is used as a first conductive electrode, and the lower casing 12 is used as a second conductive electrode; the top cover 11 is connected with the lower shell 12 in an insulating way through the insulating assembly 2; the electrode sheet assembly 3 is disposed in the square metal casing 1, and one of the positive electrode sheet 31 and the negative electrode sheet 32 of the electrode sheet assembly 3 is in contact with the top cover 11 as a first conductive electrode, and the other of the positive electrode sheet 31 and the negative electrode sheet 32 is in contact with the lower casing 12 as a second conductive electrode.
This square shell electricity core's square metal casing 1's top cap 11 is direct as first conducting electrode, inferior valve 12 is direct as the second conducting electrode, one in inferior valve 12 inside electrode slice assembly 3's positive plate 31 and the negative pole piece 32 is direct electrically conductive with the contact of top cap 11, another direct electrically conductive with inferior valve 12 contact, the leading-out terminal of certain electrode slice has been saved, need not set up utmost point ear, parts such as busbar, original utmost point ear and electrode slice's welding process has been cancelled, the structure is simplified, reliability is improved, the cost is reduced, volume group efficiency is improved.
Further, in the present embodiment, as shown in fig. 2, the electrode tab assembly 3 includes a plurality of positive electrode tabs 31, a plurality of negative electrode tabs 32, and a plurality of separators 33, the positive electrode tabs 31, the negative electrode tabs 32, and the separators 33 being perpendicular to the top cover 11; the positive electrode sheets 31 and the negative electrode sheets 32 are alternately arranged in a stacked manner, the diaphragm 33 is arranged between the adjacent positive electrode sheets 31 and the adjacent negative electrode sheets 32, the part of the positive electrode sheets 31, which is exposed out of the stacked manner, is a first contact conductive end, the part of the negative electrode sheets 32, which is exposed out of the stacked manner, is a second contact conductive end, and the stacked manner refers to the overlapping area of the positive electrode sheets 31, the negative electrode sheets 32 and the diaphragm 33; the shape of the electrode plate assembly 3 formed by laminating the positive plate 31, the negative plate 32 and the diaphragm 33 is matched with that of the square metal shell 1, and the stacking number and the size of the electrode plates can be selected according to the capacity of the battery cell. One of the first contact terminal and the second contact terminal is in contact with the first conductive electrode, and the other is in contact with the second conductive electrode. The electrode plate assembly 3 arranged in a laminated manner is adopted, so that the space can be saved, and the miniaturization of the electric square-shell battery cell is realized.
As an optimization, as shown in fig. 3, in the present embodiment, the positive electrode sheet 31 includes a positive electrode foil layer 311 and a positive electrode active material layer 312, both sides of the positive electrode foil layer 311 are coated with the positive electrode active material layer 312, and a first contact conductive end portion of the positive electrode foil layer 311 is not coated with the positive electrode active material layer 312 for contact conduction with the top cap 11 or the lower case 12. Preferably, the positive electrode foil layer 311 is an aluminum foil layer.
Similarly, in the present embodiment, the negative electrode sheet 32 includes a negative electrode foil layer and a negative electrode active material layer, both sides of the negative electrode foil layer are coated with the negative electrode active material layer, and the second contact conductive end portion of the negative electrode foil layer is not coated with the negative electrode active material layer for contact conduction with the top cap 11 or the lower case 12. Preferably, the negative electrode foil layer is a copper foil layer.
As shown in fig. 1, in the present embodiment, the insulation assembly 2 includes an insulation part 21 and a metal part 22; the insulating part 21 is a hollow structure, and the top cover 11 covers one end of the insulating part 21 far away from the lower shell 12; the metal part 22 is provided at the peripheral edge of the insulating part 21, and the metal part 22 is hermetically connected to one end of the lower case 12 close to the top cover 11. The insulating isolation between the top cover 11 and the lower shell 12 is realized through the insulating assembly 2, the insulating isolation of the first conducting electrode and the second conducting electrode is further realized, the lower shell 12 is sealed through the insulating assembly 2, and necessary components such as the internal electrode plate component 3 and electrolyte are protected.
Based on the square-shell battery cell described in any of the above embodiments, an embodiment of the present invention further provides a battery module, which includes a battery cell, where the battery cell is the square-shell battery cell described in any of the above embodiments, and the number of the square-shell battery cells may be multiple, and the multiple square-shell battery cells are connected in series and parallel.
Because the battery module in this application has adopted the square-shell electricity core in this application, consequently, has saved the leading-out terminal of a certain electrode slice, need not set up parts such as utmost point ear, busbar, has cancelled the welding process of original utmost point ear and electrode slice, has simplified the structure, has improved the reliability, and the cost is reduced has improved volume and has become efficiency in groups.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A square-shelled electrical core, comprising:
a square metal casing having a top cover as a first conductive electrode and a lower case as a second conductive electrode;
the top cover and the lower shell are in insulated connection through the insulating assembly;
the electrode plate assembly is arranged in the square metal shell, one of a positive plate and a negative plate of the electrode plate assembly is in contact with the first conductive electrode, and the other of the positive plate and the negative plate is in contact with the second conductive electrode.
2. The square-shell battery cell according to claim 1, wherein the electrode sheet assembly comprises a plurality of positive electrode sheets, a plurality of negative electrode sheets and a plurality of diaphragms, the positive electrode sheets and the negative electrode sheets are alternately arranged in a stacked manner, the diaphragms are arranged between the adjacent positive electrode sheets and the adjacent negative electrode sheets, the part of the positive electrode sheets, which is exposed out of the stacked layers, is a first contact conductive end, the part of the negative electrode sheets, which is exposed out of the stacked layers, is a second contact conductive end, one of the first contact conductive end and the second contact conductive end is in contact with the first conductive electrode, and the other of the first contact conductive end and the second contact conductive end is in contact with the second conductive electrode.
3. The square-shell battery cell of claim 2, wherein the positive plate comprises:
a positive electrode foil layer;
the positive electrode comprises a positive electrode active material layer, wherein the positive electrode active material layer is coated on both sides of the positive electrode foil layer, and the positive electrode active material layer is not coated on the first contact conductive end part of the positive electrode foil layer.
4. The square-shell battery cell of claim 3, wherein the positive electrode foil layer is an aluminum foil layer.
5. The square-shelled electrical core of claim 2, wherein the negative pole piece comprises:
a negative electrode foil layer;
and the two sides of the negative electrode foil layer are coated with the negative electrode active material layer, and the second contact conductive end part of the negative electrode foil layer is not coated with the negative electrode active material layer.
6. The square-shelled electrical cell of claim 5, wherein the negative electrode foil layer is a copper foil layer.
7. The square-shelled electrical core of claim 1, wherein the insulating assembly comprises:
the insulating part is of a hollow structure, and the top cover covers one end, far away from the lower shell, of the insulating part;
and the metal part is arranged on the peripheral edge of the insulating part and is in sealing connection with one end, close to the top cover, of the lower shell.
8. A battery module comprising a cell, wherein the cell is the square-shell cell of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559026.XA CN114361661B (en) | 2021-05-21 | 2021-05-21 | Square shell cell and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559026.XA CN114361661B (en) | 2021-05-21 | 2021-05-21 | Square shell cell and battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114361661A true CN114361661A (en) | 2022-04-15 |
| CN114361661B CN114361661B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110559026.XA Active CN114361661B (en) | 2021-05-21 | 2021-05-21 | Square shell cell and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114361661B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483511A (en) * | 2022-10-09 | 2022-12-16 | Oppo广东移动通信有限公司 | Battery and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203631692U (en) * | 2013-12-30 | 2014-06-04 | 普天新能源车辆技术有限公司 | Battery |
| CN110752401A (en) * | 2019-09-30 | 2020-02-04 | 重庆市紫建电子有限公司 | Button cell and manufacturing method thereof |
| CN211654976U (en) * | 2020-03-16 | 2020-10-09 | 惠州惠峰科技有限公司 | Button type lithium battery without electrode lugs |
-
2021
- 2021-05-21 CN CN202110559026.XA patent/CN114361661B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203631692U (en) * | 2013-12-30 | 2014-06-04 | 普天新能源车辆技术有限公司 | Battery |
| CN110752401A (en) * | 2019-09-30 | 2020-02-04 | 重庆市紫建电子有限公司 | Button cell and manufacturing method thereof |
| CN211654976U (en) * | 2020-03-16 | 2020-10-09 | 惠州惠峰科技有限公司 | Button type lithium battery without electrode lugs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115483511A (en) * | 2022-10-09 | 2022-12-16 | Oppo广东移动通信有限公司 | Battery and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114361661B (en) | 2024-04-19 |
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Effective date of registration: 20230410 Address after: Room 202, 203, and 204, Building 2, Yard 11, Yanqi Street, Yanqi Economic Development Zone, Huairou District, Beijing, 101400 Applicant after: Beijing Lanpeng Ruichi Technology Co.,Ltd. Address before: 102402 No.1, Qihang West Street, Doudian Town, Fangshan District, Beijing Applicant before: BEIJING WELION NEW ENERGY TECHNOLOGY Co.,Ltd. |
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