CN219497880U - Foldable lithium ion battery core and lithium ion battery - Google Patents
Foldable lithium ion battery core and lithium ion battery Download PDFInfo
- Publication number
- CN219497880U CN219497880U CN202320266421.3U CN202320266421U CN219497880U CN 219497880 U CN219497880 U CN 219497880U CN 202320266421 U CN202320266421 U CN 202320266421U CN 219497880 U CN219497880 U CN 219497880U
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- winding core
- current collector
- lithium ion
- collector section
- ion battery
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 37
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 146
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012858 packaging process Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a foldable lithium ion battery core and a lithium ion battery, wherein the foldable lithium ion battery core comprises a first winding core, a second winding core, a positive electrode lug and a negative electrode lug, the first winding core is provided with a first current collector section which extends outwards, the second winding core is provided with a second current collector section which extends outwards, the first current collector section is connected with the second current collector section, the first winding core and the second winding core are connected in parallel to form a winding core body, and the positive electrode lug and the negative electrode lug are both arranged on the winding core body. The first winding core and the second winding core are connected through the first current collector section and the second current collector section to form the winding core body in parallel, so that the folding function is realized on the single-cell layer, the packaging process flow is simplified, the trouble of welding connection between the lugs by using connecting wires is reduced, and the production and the application are facilitated.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a foldable lithium ion battery core and a lithium ion battery.
Background
As electronic products iterate, folding cell phones, tablets, etc. gradually enter the consumer market, the battery is an important component in these products, and its specific setting will affect the size of the whole machine. For achieving the requirements of better thickness and capacity, for the foldable products, a common battery setting mode is to use a battery pack, specifically: several batteries are connected in series/parallel to form a battery pack for use, and the batteries can be respectively arranged at two sides of the machine body for folding so as to meet the use requirement of folding products. For the battery pack with the structure, because the battery cells of each battery are required to be packaged independently, the packaging process flow is complicated, and welding connection is required to be carried out between the lugs of the manufactured battery cells by adopting connecting wires, so that the manufacturing is also troublesome.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the foldable lithium ion battery core, and the two winding cores are connected in parallel, so that the folding function is realized on the single battery core layer, the packaging process flow is simplified, the trouble of welding and connecting the electrode lugs by using the connecting wire is reduced, and the production and the application are facilitated.
The utility model also provides a lithium ion battery with the foldable lithium ion battery core.
According to an embodiment of the first aspect of the utility model, the foldable lithium ion battery core comprises a first winding core, a second winding core, a positive electrode lug and a negative electrode lug, wherein the first winding core is provided with a first current collector section which extends outwards, the second winding core is provided with a second current collector section which extends outwards, the first current collector section is connected with the second current collector section, the first winding core and the second winding core are connected in parallel to form a winding core body, and the positive electrode lug and the negative electrode lug are both arranged on the winding core body.
The foldable lithium ion battery cell provided by the embodiment of the utility model has at least the following beneficial effects: the first winding core and the second winding core are connected through the first current collector section and the second current collector section to form the winding core body in parallel, so that the folding function is realized on the single-cell layer, the packaging process flow is simplified, the trouble of welding connection between the lugs by using connecting wires is reduced, and the production and the application are facilitated.
According to some embodiments of the utility model, the first winding core and the second winding core each comprise a cathode pole piece and an anode pole piece, a diaphragm is arranged between the cathode pole piece and the anode pole piece, the cathode pole piece, the diaphragm and the anode pole piece are overlapped and wound to form a single winding core structure, the first winding core is ended with corresponding to the cathode pole piece and is reserved with an empty current collector so as to form the first current collector section, and the second winding core is ended with corresponding to the cathode pole piece and is reserved with an empty current collector so as to form the second current collector section.
According to some embodiments of the utility model, the anode tab is welded to the anode tab of the first winding core and the anode tab of the second winding core, and the cathode tab is welded to at least one of the cathode tab of the first winding core and the cathode tab of the second winding core.
According to some embodiments of the utility model, the first and second current collector segments are partially superimposed and connected by a welded structure.
According to some embodiments of the utility model, the stacking width dimension a of the first current collector section and the second current collector section has a value in the range of 5-15mm.
According to some embodiments of the utility model, the first current collector segment is located on a side of the first winding core adjacent to the second winding core, and the second current collector segment is located on a side of the second winding core adjacent to the first winding core.
According to some embodiments of the utility model, the outer side of the winding core is provided with a packaging bag, and the packaging bag is respectively provided with a pit structure corresponding to the first winding core and a pit structure corresponding to the second winding core.
According to some embodiments of the utility model, the junction between the first current collector section and the second current collector section is secured to the package.
According to some embodiments of the utility model, the value of the preset thickness dimension H1 of the first winding core ranges from 2 to 10mm, the value of the preset length dimension L1 of the first winding core ranges from 10 to 150mm, the value of the preset width dimension W1 of the first winding core ranges from 10 to 250mm, the value of the preset thickness dimension H2 of the second winding core ranges from 2 to 10mm, the value of the preset length dimension L2 of the second winding core ranges from 10 to 150mm, and the value of the preset width dimension W2 of the second winding core ranges from 10 to 250mm.
According to a second aspect of the utility model, a lithium ion battery is provided, which comprises a foldable lithium ion battery cell according to the first aspect of the utility model.
The lithium ion battery provided by the embodiment of the utility model has at least the following beneficial effects: by adopting the foldable lithium ion battery cell, the folding function can be realized on the single battery cell layer, the packaging process flow is simplified, the trouble of welding connection by using connecting wires between the lugs is reduced, and the production and the application are facilitated.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of an end-face structure of a foldable lithium ion battery cell according to an embodiment of the present utility model;
fig. 2 is a schematic side view of the foldable lithium-ion battery cell of fig. 1.
Reference numerals:
the device comprises a first winding core 10, a first current collector section 11, a cathode pole piece 12, a diaphragm 13, a second winding core 20, a second current collector section 21, an anode pole piece 22, a positive pole lug 30 and a negative pole lug 40;
the overlapping width dimension A, the preset thickness dimension H1, the preset thickness dimension H2, the preset length dimension L1, the preset length dimension L2, the preset width dimension W1 and the preset width dimension W2.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that if dimensional descriptions such as directions of length, width, thickness, etc. are referred to as directions or positional relationships based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of the description are provided, and it is not indicated or implied that the apparatus or elements referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.
The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 and 2, a foldable lithium ion battery core includes a first winding core 10, a second winding core 20, a positive electrode tab 30 and a negative electrode tab 40, the first winding core 10 is provided with a first current collector section 11 extending outwards, the second winding core 20 is provided with a second current collector section 21 extending outwards, the first current collector section 11 is connected with the second current collector section 21, the first winding core 10 and the second winding core 20 are connected in parallel to form a winding core body, and the positive electrode tab 30 and the negative electrode tab 40 are both arranged on the winding core body.
It can be understood that the first winding core 10 and the second winding core 20 are connected through the first current collector section 11 and the second current collector section 21 to form a winding core body in parallel, so that a folding function is realized on a single cell layer, and the single cell can be independently packaged during packaging.
In some embodiments, the first winding core 10 and the second winding core 20 each include a cathode pole piece 12 and an anode pole piece 22, a separator 13 is disposed between the cathode pole piece 12 and the anode pole piece 22, the cathode pole piece 12, the separator 13 and the anode pole piece 22 are wound in a stacked manner to form a single winding core structure, the first winding core 10 is terminated with the corresponding cathode pole piece 12 and an empty current collector is reserved to form a first current collector section 11, and the second winding core 20 is terminated with the corresponding cathode pole piece 12 and an empty current collector is reserved to form a second current collector section 21.
It will be appreciated that, as shown in fig. 1, the first winding core 10 and the second winding core 20 each include a cathode pole piece 12 and an anode pole piece 22, the first winding core 10 is formed by winding one layer of cathode pole piece 12, one layer of anode pole piece 22, and a separator 13 disposed between the cathode pole piece 12 and the anode pole piece 22 in a superposition manner, the second winding core 20 is also formed by winding one layer of cathode pole piece 12, one layer of anode pole piece 22, and a separator 13 disposed between the cathode pole piece 12 and the anode pole piece 22 in a superposition manner, both are in a single winding core structure, the first winding core 10 is wound with an empty current collector of the cathode pole piece 12 and reserved with an empty current collector to form a first current collector section 11, the second winding core 20 is wound with an empty current collector of the cathode pole piece 12 and reserved with an empty current collector to form a second current collector section 21, and the first current collector section 11 is connected with the second current collector section 21 so as to connect the cathode pole pieces 12 of the two winding cores in parallel, so as to form a winding core. Further, the two winding cores may be fixedly terminated with an adhesive at the termination location of the anode pole piece 22 to avoid core loosening.
Of course, in practical application, the parallel connection between the two winding cores may be realized by connecting the anode pole pieces 22 of the two winding cores, that is, the two winding cores are respectively terminated by their own anode pole pieces 22, and an empty current collector is reserved to form the first current collector section 11 and the second current collector section 21 respectively.
In some embodiments, the anode tab 22 of the first winding core 10 and the anode tab 22 of the second winding core 20 are each welded with a negative tab 40, and at least one of the cathode tab 12 of the first winding core 10 and the cathode tab 12 of the second winding core 20 is welded with a positive tab 30.
It can be understood that, as shown in fig. 1 and 2, the anode pole piece 22 of the first winding core 10 and the anode pole piece 22 of the second winding core 20 are welded with the negative electrode lug 40, and the cathode pole piece 12 of the first winding core 10 and the cathode pole piece 12 of the second winding core 20 are welded with the positive electrode lug 30, so that the assembled battery cell is electrically connected with the outside conveniently. In practical application, since the cathode pole pieces 12 of the two winding cores are connected, the cathode pole piece 12 of one of the two winding cores can be provided with the positive pole lug 30, so that the manufacturing is convenient, the pole lug is saved, but the anode pole pieces 22 of the two winding cores are not connected, and the welding of the negative pole lug 40 is required.
In some embodiments, the first current collector section 11 and the second current collector section 21 are partially overlapped and connected by a welded structure. Specifically, the first current collector section 11 and the second current collector section 21 are partially overlapped, and the overlapped parts of the two are welded in an ultrasonic welding mode, so that connection between the two is realized, the connection mode is stable and reliable, and contact position separation caused by folding use is avoided. In practical application, after welding, the first current collector section 11 and the second current collector section 21 may be fixed by adhesive at a welding position, or may be connected by a manner such as clamping or buckling, and may be set correspondingly according to practical use needs.
In some embodiments, as shown in fig. 1, the stacking width dimension a of the first current collector section 11 and the second current collector section 21 ranges from 5mm to 15mm, so as to facilitate welding between the two current collectors and facilitate use. In practical application, the stacking width dimension A can be 5mm, 10mm or 15mm, and can be set correspondingly according to practical use requirements.
In some embodiments, the first current collector section 11 is located on the side of the first winding core 10 adjacent to the second winding core 20, and the second current collector section 21 is located on the side of the second winding core 20 adjacent to the first winding core 10.
It will be appreciated that, as shown in fig. 1, the first winding core 10 and the second winding core 20 are respectively distributed left and right, the first winding core 10 is located at the left side, the second winding core 20 is located at the right side, the first current collector section 11 is located at the lower right side of the first winding core 10 and extends to the upper left side of the second winding core 20, and the second current collector section 21 is located at the upper left side of the second winding core 20 and extends to the lower right side of the first winding core 10, so as to facilitate the welding connection between the two current collectors and facilitate the use.
In some embodiments, the outside of the winding core is provided with a package (not shown) provided with a pit structure corresponding to the first winding core 10 and to the second winding core 20, respectively.
Specifically, the package may be a double-pit package manufactured by using a double punch, and the first winding core 10 and the second winding core 20 are respectively packaged and accommodated by two pit structures corresponding to the first winding core 10 and the second winding core 20, so as to package the winding cores; or the packaging bag is a four-hole packaging bag made of four punches so as to package the winding core body, and the distance between the pit structures is matched with the empty current collector between the winding cores so as to facilitate packaging.
In some embodiments, the junction between the first current collector section 11 and the second current collector section 21 is secured to the package. It can be understood that the joint between the two current collectors is fixed, so that the welding position of the two current collectors is prevented from moving, and the use is convenient.
In some embodiments, as shown in fig. 1 and 2, the preset thickness dimension H1 of the first winding core 10 ranges from 2 to 10mm, the preset length dimension L1 of the first winding core 10 ranges from 10 to 150mm, the preset width dimension W1 of the first winding core 10 ranges from 10 to 250mm, the preset thickness dimension H2 of the second winding core 20 ranges from 2 to 10mm, the preset length dimension L2 of the second winding core 20 ranges from 10 to 150mm, and the preset width dimension W2 of the second winding core 20 ranges from 10 to 250mm.
Preferably, the value of the preset thickness dimension H1 is the same as the value of the preset thickness dimension H2, and the value of the preset length dimension L1 is the same as the value of the preset length dimension L2, so that sample preparation is convenient and consistency is maintained. For the width of the winding core, the preset width dimension W1 and the preset width dimension W2 may be different, and may be divided according to the folding ratio of the product.
In practical application, the preset thickness dimension H1 can be 2mm, 6mm, 10mm and the like, and the preset thickness dimension H2 can also be 2mm, 6mm, 10mm and the like; the preset length dimension L1 can be 10mm, 80mm, 150mm and the like, and the preset length dimension L2 can also be 10mm, 80mm, 150mm and the like; the preset width dimension W1 can be 10mm, 120mm, 250mm and the like, and the preset width dimension W2 can also be 10mm, 120mm, 250mm and the like, and can be correspondingly set according to actual use requirements.
A lithium ion battery according to an embodiment of the second aspect of the present utility model comprises a foldable lithium ion cell according to an embodiment of the first aspect of the present utility model described above.
According to the lithium ion battery provided by the embodiment of the utility model, the folding function can be realized on the single-battery-core layer by adopting the foldable lithium ion battery core, so that the packaging process flow is simplified, the trouble of welding and connecting the tabs by using connecting wires is reduced, and the production and the application are facilitated.
Since other constitution of the lithium ion battery according to the embodiment of the present utility model is known to those skilled in the art, it will not be described in detail herein.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A foldable lithium ion battery cell, comprising:
the first winding core is provided with a first current collector section which extends outwards;
the second winding core is provided with a second current collector section which extends outwards, and the first current collector section is connected with the second current collector section, so that the first winding core and the second winding core are connected in parallel to form a winding core body;
the positive electrode lug and the negative electrode lug are both arranged on the winding core body.
2. The foldable lithium-ion battery cell of claim 1, wherein the first winding core and the second winding core each comprise a cathode pole piece and an anode pole piece, a diaphragm is arranged between the cathode pole piece and the anode pole piece, the cathode pole piece, the diaphragm and the anode pole piece are overlapped and wound to form a single winding core structure, the first winding core is terminated corresponding to the cathode pole piece and is reserved with an empty current collector to form the first current collector section, and the second winding core is terminated corresponding to the cathode pole piece and is reserved with an empty current collector to form the second current collector section.
3. The foldable lithium-ion battery of claim 2, wherein the negative tab is welded to both the anode tab of the first winding core and the anode tab of the second winding core, and the positive tab is welded to at least one of the cathode tab of the first winding core and the cathode tab of the second winding core.
4. The collapsible lithium ion cell of claim 1 wherein the first current collector section and the second current collector section are partially stacked and connected by a welded structure.
5. The foldable lithium ion cell of claim 4 wherein the overlap width dimension a of the first current collector segment and the second current collector segment is in the range of 5-15mm.
6. The collapsible lithium ion cell of claim 1 wherein the first current collector segment is located on a side of the first winding core adjacent to the second winding core and the second current collector segment is located on a side of the second winding core adjacent to the first winding core.
7. The foldable lithium ion battery cell of claim 1, wherein a packaging bag is arranged on the outer side of the winding core body, and the packaging bag is respectively provided with a pit structure corresponding to the first winding core and a pit structure corresponding to the second winding core.
8. The collapsible lithium ion cell of claim 7 wherein the junction between the first current collector section and the second current collector section is secured to the package.
9. The foldable lithium-ion battery cell of claim 1, wherein the range of the preset thickness dimension H1 of the first winding core is 2-10mm, the range of the preset length dimension L1 of the first winding core is 10-150mm, the range of the preset width dimension W1 of the first winding core is 10-250mm, the range of the preset thickness dimension H2 of the second winding core is 2-10mm, the range of the preset length dimension L2 of the second winding core is 10-150mm, and the range of the preset width dimension W2 of the second winding core is 10-250mm.
10. A lithium ion battery comprising a foldable lithium ion cell according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320266421.3U CN219497880U (en) | 2023-02-13 | 2023-02-13 | Foldable lithium ion battery core and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320266421.3U CN219497880U (en) | 2023-02-13 | 2023-02-13 | Foldable lithium ion battery core and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219497880U true CN219497880U (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320266421.3U Active CN219497880U (en) | 2023-02-13 | 2023-02-13 | Foldable lithium ion battery core and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219497880U (en) |
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2023
- 2023-02-13 CN CN202320266421.3U patent/CN219497880U/en active Active
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