CN220352031U - Protective tape, electrode assembly and battery cell - Google Patents
Protective tape, electrode assembly and battery cell Download PDFInfo
- Publication number
- CN220352031U CN220352031U CN202321738858.9U CN202321738858U CN220352031U CN 220352031 U CN220352031 U CN 220352031U CN 202321738858 U CN202321738858 U CN 202321738858U CN 220352031 U CN220352031 U CN 220352031U
- Authority
- CN
- China
- Prior art keywords
- current collector
- layer
- protective tape
- conductive adhesive
- electrode assembly
- 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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Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 81
- 239000010410 layer Substances 0.000 claims abstract description 87
- 238000003466 welding Methods 0.000 claims abstract description 81
- 239000012790 adhesive layer Substances 0.000 claims abstract description 44
- 239000011149 active material Substances 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 abstract description 24
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses a protective adhesive tape, an electrode assembly and a battery cell, wherein the protective adhesive tape comprises a conductive adhesive layer, a current collector layer and an active material layer, and the conductive adhesive layer is used for being adhered to the current collector; the current collector layer is connected with the conductive adhesive layer and can be electrically connected with the current collector through the conductive adhesive layer; the active material layer is connected to one side of the current collector layer away from the conductive adhesive layer. In the electrode assembly, after the electrode lugs are welded on the current collector exposed out of the welding groove, the protective adhesive tape is stuck on the welding groove through the conductive adhesive layer to cover the electrode lugs and the current collector, and after the electrode assembly is manufactured into a battery core, the protective adhesive tape can reduce the possibility of battery short circuit caused by the fact that burrs generated by welding puncture the diaphragm, and has a protective effect on the diaphragm; the protective adhesive tape also comprises a current collector layer and an active material layer, and has conductivity, so that the active layer lost due to the arrangement of the welding groove can be compensated, the conductivity of the electrode assembly is improved, and the energy density of the battery core is improved.
Description
Technical Field
The application relates to the technical field of lithium ion batteries, in particular to a protective adhesive tape, an electrode assembly and an electric core.
Background
The lithium ion battery has the advantages of large specific energy, small self-discharge, light weight, environmental friendliness and the like, and is widely applied to the fields of mobile phones, mobile power supplies, intelligent wearable 3C digital products and the like, solar street lamp energy storage, new energy automobile power batteries and the like. The electrode lug middle-arranged structure is a structure of a common electrode assembly, and is characterized in that a welding groove is arranged on an active layer of a pole piece, a current collector of the pole piece is exposed from the welding groove, a pole lug is welded on the current collector exposed from the welding groove, an adhesive tape is stuck on the welding groove to cover the pole lug and the exposed current collector, after the electrode assembly is manufactured into a battery core, the adhesive tape can reduce the possibility of battery short circuit caused by the fact that burrs generated by welding puncture a diaphragm, and the diaphragm is protected. However, the provision of the soldering grooves may result in loss of a portion of the active layer and thus loss of energy density of the battery cell.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a protective adhesive tape, which is provided with a current collector layer and an active material layer, can compensate the active layer lost due to the arrangement of a welding groove, and is beneficial to improving the conductivity of an electrode assembly, thereby improving the energy density of a battery cell.
The application also provides an electrode assembly comprising the protective tape.
The application also provides a battery cell comprising the electrode assembly.
The protection sticky tape that this application first aspect embodiment provided for cover the welding position of the current collector of utmost point ear and pole piece, protection sticky tape includes: the conductive adhesive layer is used for being adhered to the current collector; the current collector layer is connected with the conductive adhesive layer and can be electrically connected with the current collector through the conductive adhesive layer; and the active material layer is connected to one side of the current collector layer away from the conductive adhesive layer.
The protective adhesive tape provided by the embodiment of the first aspect of the application has at least the following beneficial effects: the protective adhesive tape provided by the embodiment of the first aspect of the application comprises a conductive adhesive layer, a current collector layer and an active material layer, wherein in the electrode assembly, after the electrode lugs are welded on the current collector exposed at the welding groove, the protective adhesive tape is adhered to the welding groove through the conductive adhesive layer to cover the electrode lugs and the current collector, and after the electrode assembly is manufactured into a battery core, the protective adhesive tape can reduce the possibility of short circuit of a battery caused by the fact that burrs generated by welding puncture the diaphragm, and plays a role in protecting the diaphragm; the protective adhesive tape also comprises a current collector layer and an active material layer, and has conductivity, so that the active layer lost due to the arrangement of the welding groove can be compensated, the conductivity of the electrode assembly is improved, and the energy density of the battery core is improved.
In some embodiments of the present application, the conductive adhesive layer has a receiving groove for receiving the tab.
In some embodiments of the present application, the current collector layer is exposed from the receiving groove.
In some embodiments of the present application, the surface of the pole piece is covered with an active layer, the thickness of the active material layer being less than the thickness of the active layer.
In some embodiments of the present application, the conductive paste layer is made of conductive silver paste.
Embodiments of the second aspect of the present application provide an electrode assembly comprising: the pole piece comprises a current collector and an active layer, wherein the active layer covers the surface of the current collector and is provided with a welding groove, and the current collector is exposed from the welding groove; a tab partially received in the welding groove and welded to the current collector; the protection adhesive tape provided by any embodiment of the first aspect of the present application, the conductive adhesive layer is adhered to the current collector exposed at the welding groove, and the protection adhesive tape covers the welding position of the tab and the current collector.
The electrode assembly provided by the embodiment of the second aspect of the application has at least the following beneficial effects: the electrode assembly provided in the second aspect of the application adopts the protective tape provided in the first aspect of the application, after the tab is welded on the current collector exposed at the welding groove, the protective tape is stuck at the welding groove through the conductive adhesive layer to cover the tab and the current collector, and after the electrode assembly is manufactured into the battery core, the protective tape can reduce the possibility of battery short circuit caused by the puncture of the diaphragm by burrs generated by welding, and has a protective effect on the diaphragm; the protective adhesive tape also comprises a current collector layer and an active material layer, and has conductivity, so that the active layer lost due to the arrangement of the welding groove can be compensated, the conductivity of the electrode assembly is improved, and the energy density of the battery core is improved.
In some embodiments of the present application, the pole piece includes two active layers, two active layers cover respectively in two opposite surfaces of the current collector, two active layers all have the welding groove, the tab is held in one of the welding grooves, two welding groove department expose on the current collector all paste the protection sticky tape.
In some embodiments of the present application, the conductive adhesive layer of the protective tape on the same side of the current collector as the tab has a receiving groove that receives the tab.
In some embodiments of the present application, the length of the protective tape is greater than the length of the weld groove, and the width of the protective tape is greater than the width of the weld groove.
An embodiment of a third aspect of the present application provides a battery cell, including: a diaphragm; the electrode assembly provided in any one of the embodiments of the second aspect of the present application, the electrode sheet is laminated with the separator and wound.
The battery cell provided by the embodiment of the third aspect of the application has at least the following beneficial effects: the battery cell provided by the embodiment of the third aspect of the application adopts the electrode assembly provided by the embodiment of the second aspect of the application, and the protective adhesive tape provided by the embodiment of the first aspect of the application is arranged in the electrode assembly, so that the protective adhesive tape can compensate the active layer lost due to the arrangement of the welding groove, the conductivity of the electrode assembly is improved, and the energy density of the battery cell is improved.
Additional aspects and advantages of the application 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 application.
Drawings
The application is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a protective tape provided in some embodiments of a first aspect of the present application;
FIG. 2 is a schematic cross-sectional view of a protective tape provided in further embodiments of the first aspect of the present application;
FIG. 3 is a front view of the protective tape shown in FIG. 2;
FIG. 4 is a schematic cross-sectional view of an electrode assembly provided by some embodiments of a second aspect of the present application;
fig. 5 is an exploded view of the electrode assembly shown in fig. 4;
fig. 6 is a front view of the electrode assembly shown in fig. 4.
Reference numerals:
protective tape 100, conductive adhesive layer 110, receiving groove 111, current collector layer 120, active material layer 130, pole piece 200, current collector 210, active layer 220, welding groove 221, and tab 300.
Detailed Description
Embodiments of the present application 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 exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that, with reference to an orientation description, for example, an orientation or positional relationship indicated by upper, lower, left, right, etc. is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present application and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, 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 application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.
In the description of the present application, reference to the term "one embodiment," "some embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The lithium ion battery has the advantages of large specific energy, small self-discharge, light weight, environmental friendliness and the like, and is widely applied to the fields of mobile phones, mobile power supplies, intelligent wearable 3C digital products and the like, solar street lamp energy storage, new energy automobile power batteries and the like. The tab center structure is a structure of a conventional electrode assembly, in which a welding groove 221 is generally formed in an active layer 220 of a pole piece 200, a current collector 210 of the pole piece 200 is exposed from the welding groove 221, a tab 300 is welded to the current collector 210 exposed from the welding groove 221, an adhesive tape is adhered to the welding groove 221 to cover the tab 300 and the exposed current collector 210, and after the electrode assembly is manufactured into a battery core, the adhesive tape can reduce the possibility of battery short circuit caused by the rupture of a separator due to burrs generated by welding, thereby protecting the separator. However, the provision of the soldering grooves 221 may lose a portion of the active layer 220, thereby causing a loss of energy density of the battery cell.
Based on this, referring to fig. 1 to 3, the protective tape 100 provided in the first embodiment of the present application is configured to cover the welding position of the tab 300 and the current collector 210 of the pole piece 200, where the protective tape 100 includes a conductive adhesive layer 110, a current collector layer 120, and an active material layer 130, and the conductive adhesive layer 110 is configured to be adhered to the current collector 210; the current collector layer 120 is connected to the conductive adhesive layer 110, and the current collector layer 120 can be electrically connected to the current collector 210 through the conductive adhesive layer 110; the active material layer 130 is connected to a side of the current collector layer 120 remote from the conductive adhesive layer 110.
Referring to fig. 4 to 6, in the electrode assembly, after the tab 300 is welded to the current collector 210 exposed at the welding groove 221, the protective tape 100 is adhered to the welding groove 221 through the conductive adhesive layer 110 to cover the tab 300 and the current collector 210, and after the electrode assembly is manufactured into a battery cell, the protective tape 100 can reduce the possibility of battery short circuit caused by the puncture of the separator by burrs generated by welding, and protect the separator; since the protective tape 100 further includes the current collector layer 120 and the active material layer 130, the protective tape 100 also has an electrical conductivity, so that the active layer 220 lost due to the provision of the welding groove 221 can be compensated for, which is advantageous in improving the electrical conductivity of the electrode assembly, thereby improving the energy density of the battery cell.
It will be appreciated that the protective tape 100 may be prepared by: the metal foil is taken as the current collector layer 120, one side of the current collector layer 120 is covered with active substances by coating or rolling to form an active substance layer 130 on one side of the current collector layer 120, and the other side of the current collector layer 120 is covered with conductive adhesive by coating to form the conductive adhesive layer 110.
Further, referring to fig. 2 and 3, the conductive adhesive layer 110 has a receiving groove 111; after the protective tape 100 is adhered to the welding groove 221 of the pole piece 200, referring to fig. 4 and 5, the tab 300 is accommodated in the accommodating groove 111, the accommodating groove 111 avoids the tab 300, and the thickness of the position of the tab 300 after the protective tape 100 is adhered is reduced, so that the height difference between the position of the tab 300 and other positions in the welding groove 221 is reduced, and the flatness of the battery cell prepared by the electrode assembly comprising the protective tape 100 provided by the embodiment of the first aspect of the application is improved.
The depth of the receiving groove 111 may be set to be smaller than the thickness of the conductive adhesive layer 110; more preferably, referring to fig. 2, the depth of the receiving groove 111 may be set to be equal to the thickness of the conductive adhesive layer 110 such that the current collector layer 120 is exposed from the receiving groove 111. When the protective tape 100 is manufactured, the depth of the accommodating groove 111 is the same as that of the conductive adhesive layer 110, so that the accommodating groove 111 can be prepared on the conductive adhesive layer 110 by embedding adhesive paper, intermittent coating or laser cleaning and the like without making the conductive adhesive layer 110 have different thicknesses at different positions in the manufacturing process, thereby being beneficial to simplifying the manufacturing process of the protective tape 100 and reducing the production cost.
It is understood that, when the protective tape 100 is attached, there may be a certain deviation from a predetermined position, in order to reduce the possibility that the tab 300 cannot be completely received in the receiving groove 111 due to the position deviation of the protective tape 100, referring to fig. 6, the width W4 of the receiving groove 111 may be set to be greater than the width W3 of the portion of the tab 300 welded to the current collector 210, and the length L4 of the receiving groove 111 may be set to be greater than the length L3 of the portion of the tab 300 overlapped with the current collector 210, so that the receiving groove 111 has a sufficient tolerance space in both the width direction and the length direction of the tab 300.
Further, referring to fig. 4 and 5, the surface of the pole piece 200 is covered with the active layer 220, and the depth of the welding groove 221 to which the protective tape 100 is attached is the thickness D1 of the active layer 220, and since the protective tape 100 includes the current collector layer 120 and the conductive adhesive layer 110 in addition to the active material layer 130, the thickness D2 of the active material layer 130 is smaller than the thickness D1 of the active layer 220, so that the thickness of the protective tape 100 can be reduced, so as to reduce the thickness difference between the position to which the protective tape 100 is attached and other positions of the pole piece 200, which is beneficial to improving the flatness of the battery core prepared by the electrode assembly including the protective tape 100 provided in the embodiment of the first aspect of the present application.
It should be noted that, the protection tape 100 shown in fig. 4 is only one possible embodiment that is flush with the surface of the other portion of the pole piece 200 after being attached to the welding groove 221, and the thickness of the active material layer 130 is designed and used in practical production in view of practical requirements, productivity, etc., so that the situation that the protection tape 100 is higher or lower than the surface of the other portion of the pole piece 200 after being attached to the welding groove 221 may also occur. The active layer 220 and the active material layer 130 are both formed of an active material, and the active material layer 220 and the active material layer 130 may be formed of the same active material.
Specifically, the conductive adhesive layer 110 is made of conductive silver adhesive, and the conductive silver adhesive can bond the components on two sides with higher strength after being cured, so that the structural stability of the electrode assembly is improved; the curing temperature is lower, the curing speed is higher, and the production efficiency is improved; the conductive performance is stable, and the electric performance of the electrode assembly is guaranteed.
Referring to fig. 4 to 6, an electrode assembly according to a second aspect of the present application includes a pole piece 200, a tab 300, and a protective tape 100 according to any one of the first aspect of the present application, where the pole piece 200 includes a current collector 210 and an active layer 220, the active layer 220 covers a surface of the current collector 210, the active layer 220 has a welding groove 221, and the current collector 210 is exposed from the welding groove 221; the tab 300 is partially received in the welding groove 221 and welded to the current collector 210; the conductive adhesive layer 110 is adhered to the current collector 210 exposed at the welding groove 221, and the protective adhesive tape 100 covers the welding position of the tab 300 and the current collector 210.
After the electrode assembly provided in the second aspect of the present application adopts the protective tape 100 provided in the first aspect of the present application, after the tab 300 is welded to the current collector 210 exposed at the welding groove 221, the protective tape 100 is adhered to the welding groove 221 through the conductive adhesive layer 110 to cover the tab 300 and the current collector 210, and after the electrode assembly is manufactured into a battery cell, the protective tape 100 can reduce the possibility of battery short circuit caused by the puncture of the separator by burrs generated by welding, and protect the separator; since the protective tape 100 further includes the current collector layer 120 and the active material layer 130, the protective tape 100 also has an electrical conductivity, so that the active layer 220 lost due to the provision of the welding groove 221 can be compensated for, which is advantageous in improving the electrical conductivity of the electrode assembly, thereby improving the energy density of the battery cell.
Further, referring to fig. 4 and 5, the pole piece 200 includes two active layers 220, the two active layers 220 are respectively covered on two opposite surfaces of the current collector 210, the tab 300 is welded to the current collector 210 generally by means of laser welding, and during the laser welding, the laser penetrates through the tab 300 and the current collector 210, so that the two active layers 220 are provided with welding grooves 221, the two welding grooves 221 are symmetrically arranged on two sides of the current collector 210, and at the welding grooves 221, two sides of the current collector 210 are exposed outside, the tab 300 is accommodated in one of the welding grooves 221 and is adhered to and welded with the current collector 210; after welding, both sides of the current collector 210 are provided with welding marks, the current collector 210 exposed at the two welding grooves 221 is stuck with the protective adhesive tapes 100, the two protective adhesive tapes 100 can respectively cover exposed areas at both sides of the current collector 210 and burrs and bulges generated by welding, on one hand, the diaphragms at both sides of the electrode assembly can be protected, the possibility of battery short circuit caused by the diaphragms pierced by the burrs, the bulges and the like is reduced, on the other hand, the welding spots of the tab 300 and the current collector 210 can be protected, and the possibility of disconnection of the welding parts of the tab 300 and the current collector 210 is reduced.
Further, referring to fig. 4 and 5, the conductive adhesive layer 110 of the protective tape 100, which is located on the same side of the current collector 210 as the tab 300, has a receiving groove 111, and the receiving groove 111 receives the tab 300; the conductive adhesive layer 110 of the protective tape 100 on the other side of the current collector 210 is not provided with the accommodating groove 111. On one side of the current collector 210 welded with the tab 300, the accommodating groove 111 avoids the tab 300, and reduces the thickness of the position of the tab 300 after the protective tape 100 is adhered to the tab 300, so as to reduce the height difference between the position of the tab 300 and other positions in the welding groove 221; on the other side of the current collector 210, the thickness of the protective tape 100 is consistent, and the protective tape is adhered to the relatively flat side of the current collector 210 away from the tab 300, so that a relatively flat surface can be formed, which is beneficial to improving the flatness of the battery cell prepared by the electrode assembly provided by the embodiment of the second aspect of the application.
Further, referring to fig. 6, the length L2 of the protective tape 100 is greater than the length L1 of the welding groove 221, and the width W2 of the protective tape 100 is greater than the width W1 of the welding groove 221, so that the protective tape 100 has enough tolerance in both the width direction and the length direction of the welding groove 221, and when the protective tape 100 is adhered to the welding groove 221, even if the actual position of the protective tape 100 is slightly deviated from the predetermined adhering position, the protective tape 100 can still cover the whole welding groove 221 completely, and the safety performance of the battery cell is ensured.
The battery cell provided by the embodiment of the third aspect of the application comprises a diaphragm and the electrode assembly provided by any embodiment of the second aspect of the application, wherein the pole piece 200 is laminated with the diaphragm and wound.
The battery cell provided by the embodiment of the third aspect of the application adopts the electrode assembly provided by the embodiment of the second aspect of the application, the protective tape 100 provided by the embodiment of the first aspect of the application is arranged in the electrode assembly, the protective tape 100 can compensate the active layer 220 lost due to the arrangement of the welding groove 221, and the conductivity of the electrode assembly is improved, so that the energy density of the battery cell is improved.
It can be appreciated that, in the battery core provided in the embodiment of the third aspect of the present application, only one electrode assembly may be provided to adopt the electrode assembly provided in the embodiment of the second aspect of the present application, or both electrode assemblies may be provided to adopt the electrode assembly provided in the embodiment of the second aspect of the present application, and may be set according to actual requirements.
The embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application 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 application. Furthermore, embodiments of the present application and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The protection sticky tape for cover the welding position of the mass flow body of utmost point ear and pole piece, its characterized in that, the protection sticky tape includes:
the conductive adhesive layer is used for being adhered to the current collector;
the current collector layer is connected with the conductive adhesive layer and can be electrically connected with the current collector through the conductive adhesive layer;
and the active material layer is connected to one side of the current collector layer away from the conductive adhesive layer.
2. The protective tape of claim 1, wherein the conductive adhesive layer has a receiving groove for receiving the tab.
3. The protective tape of claim 2, wherein the current collector layer is exposed from the receiving groove.
4. The protective tape of claim 1, wherein the surface of the pole piece is covered with an active layer, the active material layer having a thickness less than the thickness of the active layer.
5. The protective tape of claim 1, wherein the conductive adhesive layer is made of conductive silver adhesive.
6. An electrode assembly, comprising:
the pole piece comprises a current collector and an active layer, wherein the active layer covers the surface of the current collector and is provided with a welding groove, and the current collector is exposed from the welding groove;
a tab partially received in the welding groove and welded to the current collector;
the protective tape according to any one of claims 1 to 5, wherein the conductive adhesive layer is adhered to the current collector exposed at the soldering bath, and the protective tape covers the current collector exposed at the soldering bath.
7. The electrode assembly of claim 6, wherein the electrode tab comprises two active layers respectively covering two opposite surfaces of the current collector, each of the two active layers has the welding grooves, the tab is received in one of the welding grooves, and the protective tape is adhered to the current collector exposed at each of the welding grooves.
8. The electrode assembly according to claim 7, wherein the conductive adhesive layer of the protective tape on the same side as the tab is located on the current collector has a receiving groove that receives the tab.
9. The electrode assembly of claim 6, wherein the length of the protective tape is greater than the length of the welding groove, and the width of the protective tape is greater than the width of the welding groove.
10. The electric core, its characterized in that includes:
a diaphragm;
the electrode assembly of any one of claims 6 to 9, the pole piece being laminated with the separator and wound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321738858.9U CN220352031U (en) | 2023-07-04 | 2023-07-04 | Protective tape, electrode assembly and battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321738858.9U CN220352031U (en) | 2023-07-04 | 2023-07-04 | Protective tape, electrode assembly and battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220352031U true CN220352031U (en) | 2024-01-16 |
Family
ID=89477354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321738858.9U Active CN220352031U (en) | 2023-07-04 | 2023-07-04 | Protective tape, electrode assembly and battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220352031U (en) |
-
2023
- 2023-07-04 CN CN202321738858.9U patent/CN220352031U/en active Active
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