CN215451700U - Battery cell pole piece and battery cell - Google Patents
Battery cell pole piece and battery cell Download PDFInfo
- Publication number
- CN215451700U CN215451700U CN202121290091.9U CN202121290091U CN215451700U CN 215451700 U CN215451700 U CN 215451700U CN 202121290091 U CN202121290091 U CN 202121290091U CN 215451700 U CN215451700 U CN 215451700U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- main body
- cutting line
- side edge
- sub
- 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.)
- Active
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims description 7
- 239000011267 electrode slurry Substances 0.000 claims 2
- 238000003698 laser cutting Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000571 coke Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 239000011149 active material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000002003 electrode paste Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- Connection Of Batteries Or Terminals (AREA)
Abstract
The embodiment of the application provides a battery core pole piece and a battery core, the battery core pole piece is divided into a main body part and a pole ear part, the pole ear part is connected with the main body part, an opening is formed on the pole ear part, the opening is positioned at a corner part of the pole ear part far away from the main body part, a cutting line is formed at the position of the pole ear part corresponding to the opening, one end of the cutting line is positioned at a top edge, the other end of the cutting line is positioned at the second side edge of the pole ear, and the ratio range of the distance from the position of the track end at the second side edge of the pole ear to the top edge of the pole ear to the total height of the pole ear is 1/3-2/5, so that in the process of cutting the opening of the battery core pole piece, the influence of the swing of the top edge of the pole ear part on the laser cutting end is small, the laser at the tail part of the laser cutting track is not easy to lose coke, the complete cutting of the opening is ensured, and the condition that the pole ear part is adhered with leftover materials in the normal high-speed production process can be avoided, therefore, short circuit caused by leftover materials can be avoided, and the safety of the battery cell is improved.
Description
Technical Field
The utility model relates to the field of batteries, in particular to a battery core pole piece and a battery core.
Background
A battery is a device that converts chemical energy into electrical energy. Batteries are broadly classified into batteries having wound cells and batteries having laminated cells. The battery forms a battery core through the combination of the battery core pole piece, the diaphragm and the electrolyte, and the pole lugs are connected with the battery core and lead out the positive pole and the negative pole in the battery core. In a multi-tab battery cell, a plurality of tabs are distributed at intervals along the length direction of a pole piece, in the production process, in order to conveniently identify a complete pole piece unit in the winding process or the lamination process, identification holes can be punched on the tabs at a certain distance, but in the process of punching the identification holes, the condition that the identification holes are provided with leftover materials can exist, namely, the leftover materials are adhered to the tabs after the identification holes are cut. The adhered leftover materials can cause short circuit of the pole pieces of the battery cell, and the safety performance of the battery cell is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a battery cell pole piece and a battery cell, which can avoid the condition that leftover materials exist on the battery cell pole piece and improve the safety performance.
An embodiment of the present application provides a battery cell pole piece, include:
a main body portion;
the tab part comprises a top edge, a bottom edge, a first side edge and a second side edge, the bottom edge is connected with the main body part, the top edge is located at a position where the tab part is far away from the main body part, one end of the first side edge and one end of the second side edge are connected with the main body part, and the other end of the first side edge and the other end of the second side edge are connected with the top edge; the number of the pole ear parts is more than two, and the pole ear parts are distributed at intervals along the length direction of the main body part; openings are formed in the two pole lug parts at intervals of S along the length direction of the main body part, and the openings are used for identifying a complete pole piece unit in a winding process, and the length of the pole piece unit is S; the opening is located utmost point ear is kept away from a bight of main part, utmost point ear portion corresponds open-ended position is formed with the cutting line, the one end of cutting line is located the topside, the other end of cutting line is located the second side, and the cutting line is located the distance of the tip of second side distance utmost point ear topside is H1, utmost point ear overall height is H2, and the scope of H1H 2 is 1/3-2/5.
In some embodiments, the cut line includes a first segment connected to the second side edge and a second segment connected to the first segment, the second segment being connected to the top edge.
In some embodiments, the lug portion further comprises a first sub-portion and a second sub-portion, the first side and the top side being located in the first sub-portion, the second side being located in the second sub-portion; a first section of the cutting line is located in the second sub-portion, and a second section of the cutting line is located in the first sub-portion; one part of the bottom edge is positioned in the first sub-portion, and the other part of the bottom edge is positioned in the second sub-portion.
In some embodiments, the cut line is "L" shaped, with the first segment perpendicular to the second segment.
In some embodiments, the first segment is parallel to the body portion and the second segment is perpendicular to the body portion.
In some embodiments, the included angle between the first and second segments ranges from 30 ° to 150 °.
In some embodiments, the cut line is a curve.
In some embodiments, the cutting line is a circular arc or an irregular curve.
In some embodiments, the body portion is coated with a positive electrode paste or a negative electrode paste.
The embodiment of the application further provides a battery cell, which comprises the battery cell pole piece.
The embodiment of the application provides a battery core pole piece, this battery core pole piece divide into main part and utmost point ear portion, utmost point ear portion is connected with the main part, be formed with the opening on the utmost point ear portion, the opening is located utmost point ear portion and keeps away from a bight of main part, utmost point ear portion corresponds open-ended position and is formed with the line of cut, the one end of line of cut is located the topside, the other end of line of cut is located the second side edge of utmost point ear, the ratio range of the position of orbit end at utmost point ear side distance utmost point ear topside and utmost point ear overall height is 1/3-2/5, so that battery core pole piece is in the open-ended in-process of cutting, the swing of utmost point ear portion topside is less to laser cutting end, laser nonvolatile burnt is located to the laser cutting orbit ending, guarantee the complete cutting of opening, and then can avoid the condition that utmost point ear portion adhesion leftover bits and pieces appear in normal high-speed production process, consequently can avoid because the short circuit that leftover bits arouse, thereby improving the safety of the battery cell.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a battery cell provided in an embodiment of the present application.
Fig. 2 is a schematic view of a first structure of a cell pole piece in the prior art, which is provided in an embodiment of the present application.
Fig. 3 is a schematic view of a first partial structure of the cell pole piece in the prior art shown in fig. 2.
Fig. 4 is a schematic diagram of a second structure of a cell pole piece provided in an embodiment of the present application
Fig. 5 is a schematic diagram of a second partial structure of the cell pole piece shown in fig. 4.
Fig. 6 is a schematic diagram of a third partial structure of the cell pole piece shown in fig. 4.
Fig. 7 is a schematic diagram of a fourth partial structure of the cell pole piece shown in fig. 4.
Reference numerals
200-cell 100-cell pole piece 110-main body part
120-pole ear 121-opening 122-bottom edge
123-top edge 124-first side edge 125-second side edge
126-cut line 1261-first section 1262-second section
127-the first sub-portion 128-the second sub-portion
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.
The embodiment of the application provides a battery cell pole piece and a battery cell, which can avoid the condition that leftover materials exist on the battery cell pole piece and improve the safety performance. The following description will be made with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery cell provided in an embodiment of the present application.
The battery cell 200 includes a battery cell pole piece 100, a diaphragm, and an electrolyte, where the battery cell pole piece 100 includes a positive pole piece and a negative pole piece. The battery cell 200 is the smallest unit of the battery system. The capacity of the battery is determined by the amount of active materials attached to the positive plate and the negative plate. The gram capacity of active materials of the positive plate and the negative plate, the proportion of the active materials, the thickness of the plate, the compaction density and the like have important influence on the capacity and the like. The separator is considered as a "third electrode" of the battery, is arranged between the positive electrode and the negative electrode of the battery, plays a role in blocking the contact between the positive electrode and the negative electrode and allowing ions in the electrolyte to freely pass through, and is a core component of the lithium ion battery. The electrolyte is the 'blood' of the battery, bears the weight of transporting ions, guarantees the advantages of high voltage, high specific energy and the like of the battery, and influences the safety of the lithium ion battery to a certain extent.
In some embodiments, the manufacturing process of the battery cell 200 is as follows:
(1) and (4) pulping the active material. The battery active material was stirred into a slurry state by a vacuum stirrer.
(2) And coating the slurry. The stirred slurry is uniformly coated on the upper and lower surfaces of the metal sheet to obtain the battery core pole piece 100, such as an aluminum foil.
(3) Cold pressing and pre-cutting. The pole pieces attached with the anode and cathode materials are rolled through the roller, so that the coated materials are more compact, the energy density is improved, and the consistency of the thickness is ensured. And after the pole piece after cold pressing is obtained, slitting the pole piece according to the size of the battery produced by the pole piece.
(4) And die cutting and stripping the tabs. The tab die-cutting process is to cut out the tab for the battery cell 200 for the pole piece through a die-cutting machine. The tab is a metal conductor that leads out the positive electrode and the negative electrode from the battery cell 200, and it can be understood that the tab is a contact point during charging and discharging, and the battery cell pole piece 100 is cut by a cutter in the splitting procedure.
(5) And (4) preparing the battery cell 200. The positive electrode sheet, the negative electrode sheet and the separator are combined into the battery cell 200 in a winding manner.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic view of a first structure of a cell pole piece in the prior art according to an embodiment of the present disclosure. Fig. 3 is a schematic view of a first partial structure of the cell pole piece in the prior art shown in fig. 2. The cell pole piece 100 includes a main body portion 110 and a pole ear portion 120.
In the forming process of the tab portion 120 of the lithium battery cell 200, a plurality of tab portions 120 are cut by laser, the tab portion 120 includes a top edge 123, a bottom edge 122, a first side edge 124 and a second side edge 125, the bottom edge 122 is connected with the main body portion 110, the top edge 123 is located at a position where the tab portion 120 is far away from the main body portion 110, one ends of the first side edge 124 and the second side edge 125 are connected with the main body portion 110, and the other ends of the first side edge 124 and the second side edge 125 are connected with the top edge 123. A plurality of pole ear portions 120 are spaced apart along the length of the pole piece. Then, openings 121 are cut in the tab portions 120 spaced apart by a distance S to facilitate identification of a complete pole piece unit having a length S in the pole piece running direction during the winding process. In the prior art, as shown in fig. 2 and 3, the opening 121 is U-shaped and is located on the central axis of the lug portion 120, the laser cut trace ending is at a right angle due to the opening 121 being located at the top edge of the lug portion 120, and the laser cut trace ending is located at the top edge of the lug portion. Because the top edge of the tab part is greatly swung under the influence of negative pressure wind speed, physical characteristics and the like in the processing process, laser defocusing at the ending part of a laser cutting track is easily caused under the condition, and further, the phenomenon of continuous cutting of the leftover materials in the normal high-speed production process is caused, so that the leftover materials are adhered to the tab parts 120 of the positive and negative electrode plates, the short circuit of the positive and negative electrode plates is caused, and the safety performance of the power battery cell 200 is seriously influenced.
Referring to fig. 4 and fig. 5, fig. 4 is a second structural schematic diagram of a cell pole piece according to an embodiment of the present disclosure, and fig. 5 is a second partial structural schematic diagram of the cell pole piece shown in fig. 4.
The cell pole piece 100 includes a main body portion 110 and a pole ear portion 120. The material of the cell pole piece 100 is metal, such as aluminum. Specifically, the material of the cell pole piece 100 is aluminum, and the material of the main body 110 and the pole ear 120 is also aluminum.
The main body 110 is coated with a positive electrode paste or a negative electrode paste including powder, a conductive agent, a binder, and an additive. The powder, the conductive agent, the adhesive and the additive are uniformly stirred at a high speed and then coated on the main body 110.
As shown in fig. 4 and 5, in the forming process of the tab portion 120 of the lithium battery cell 200, a plurality of tab portions 120 are cut by laser, the tab portions 120 are distributed at intervals along the length direction of the tab, each tab portion 120 includes a top edge 123, a bottom edge 122, a first side edge 124 and a second side edge 125, the bottom edge 122 is connected to the main body portion 110, the top edge 123 is located at a position where the tab portion 120 is far away from the main body portion 110, one end of the first side edge 124 and one end of the second side edge 125 are connected to the main body portion 110, and the other end of the first side edge 124 and the other end of the second side edge 150 are connected to the top edge 123. A plurality of pole ear portions 120 are spaced apart along the length of the pole piece. Then, openings 121 are cut in the tab portions 120 spaced apart by a distance S to facilitate identification of a complete pole piece unit having a length S in the pole piece running direction during the winding process. In the embodiment shown in fig. 4 and 5, the opening 121 is located at a corner of the ear portion 120 that is distal from the body portion 110. Where the tab portion 120 includes a plurality of corners, the opening 121 may be located at each corner of one tab or at a portion of the corners. It will be appreciated that during the laser cutting process of forming opening 121 in tab portion 120, cutting line 126 is formed at the location of tab portion 120 corresponding to opening 121, one end of cutting line 126 is located at top edge 123, the other end of cutting line 126 is located at second side edge 125 of the tab, and the laser cutting end is located at a distance H1 from the top edge, the total height of the tab is H2, and the ratio of distance H1 to the total height H2 of the tab ranges from 1/3 to 2/5.
Because the top edge of the tab part swings greatly under the influence of negative pressure wind speed, physical characteristics and the like in the processing process, in the embodiment shown in fig. 4 and 5, the laser cutting end of the opening 121 is arranged on the side edge of the tab part 120, and a distance H1 exists between the laser cutting end and the top edge 123 at the position of the side edge of the tab, in this case, the influence of the swing of the top edge of the tab on the laser cutting end is small, the laser at the ending part of the laser cutting track is not burnt easily, the complete cutting of the opening 121 is ensured, and then the situation that the tab part 120 is adhered with leftover materials in the normal high-speed production process can be avoided, so that the short circuit caused by the leftover materials can be avoided, and the safety of the battery cell 200 is improved.
In the embodiment shown in fig. 4 and 5, the tab portion 120 includes a bottom edge 122, a top edge 123, a first side edge 124, and a second side edge 125, the top edge 123 is located at a position away from the body portion 110 of the tab portion 120, one end of the first side edge 124 and the second side edge 125 is connected to the body portion 110, and the other end of the first side edge 124 and the second side edge 125 is connected to the top edge 123. The opening 121 forms a cut 126 in the tab portion 120. the cut 126 begins at the top edge 123 of the tab portion 120 and terminates at the second side edge 125 of the tab portion.
In the embodiment shown in figures 4 and 5, cut line 126 includes a first segment 1261 and a second segment 1262 connected to first segment 1261, the first segment 1261 being connected to second side edge 125, and the second segment 1262 being connected to top edge 123. It can be understood that, the in-process of laser cutting utmost point ear portion 120, can adopt the mode of sectional type cutting, make cutting end and second side 125 be connected, and laser cutting end is apart from a distance H1 on topside 123 in the position of utmost point ear second side 125, and under this condition, the swing of utmost point ear topside is less to the terminal influence of laser cutting, the nonvolatile burnt of laser cutting orbit ending department laser, ensure the complete cutting of opening 121, and then can avoid the condition that utmost point ear portion 120 adhesion leftover bits appear in normal high-speed production process, consequently can avoid because the short circuit that the leftover bits arouse, thereby improve electric core 200's security. It should be noted that the cutting line is "L" shaped, and the angle between the first section 1261 and the second section 1262 is 90 °. It is understood that in other embodiments, the included angle between the first section 1261 and the second section 1262 may also range between 30-150, such as 60 or 150. In addition, it can be understood that, in other embodiments, the cutting line 126 may also be a curved line, for example, please refer to fig. 6 and fig. 7, fig. 6 is a schematic diagram of a third partial structure of the cell pole piece shown in fig. 4, fig. 7 is a schematic diagram of a fourth partial structure of the cell pole piece shown in fig. 4, and the cutting line 126 may also be a curved line, for example, an arc line, as shown in fig. 6, or another irregular curve, as shown in fig. 7.
In some embodiments, the tab part 120 further includes a first sub-portion 127 and a second sub-portion 128, the first side edge 124 and the top edge 123 are located on the first sub-portion 127, the second side edge 125 is located on the second sub-portion 128, a portion of the bottom edge 122 is located on the first sub-portion 127, and another portion of the bottom edge 122 is located on the second sub-portion 128. The first portion 1261 of the cutting line 126 is located in the second sub-portion 128 and the second portion 1262 of the cutting line 126 is located in the first sub-portion 127.
In some embodiments, with continued reference to fig. 5, the first section 1261 of the cut line 126 is parallel to the body portion 110, and the second section 1262 is perpendicular to the body portion 110. In this case, the laser cutting path starts from the top edge 123 of the tab portion 120, cuts in a direction perpendicular to the main body portion 110, and then runs parallel to the main body portion 110 to the second side edge 125 of the tab portion 120. Laser cutting cuts the tab portion 120 using this trajectory results in a simple and easy to operate cutting path, and the laser cut ends are spaced from the top edge by a distance H1, the total tab height is H2, and the ratio of the distance H1 to the total tab height H2 ranges from 1/3 to 2/5. Under this condition, the swing of utmost point ear 120 topside 123 is less to the terminal influence of laser cutting, and the nonvolatile burnt of laser cutting orbit ending department laser ensures the complete cutting of opening 121, and then can avoid appearing the condition of utmost point ear 120 adhesion leftover bits in normal high-speed production process, consequently can avoid because the short circuit that the leftover bits arouse to improve electric core 200's security.
In some embodiments, the manufacturing process of the cell pole piece 100 is as follows:
(1) a cell pole piece 100 is obtained, and the cell pole piece 100 includes a pole ear portion 120 and a main body portion 110.
(2) The distance H2 between the top edge 123 of the tab portion 120 and the main body portion 110 is measured. For example, the distance is 25.5 ± 0.5 mm.
(3) The depth H1 of the opening 121 is determined to be 1/3 to 2/5 times the distance H2, for example, the distance is 25.5 ± 0.5mm, the depth H1 of the opening 121 may be 7.5 to 10.2mm, and a specific size is selected as the depth value of the opening 121 according to the condition of identifying the opening 121 in the subsequent winding process, for example, the depth value is 8 mm. The depth H1 is the distance from the end of the cut line on the second side edge to the top of pole ear 120.
(4) The depth value is recorded into the laser die-cutting and slitting integrated machine, and the polar ear part 120 is subjected to trial cutting. After the cut is complete, the tab portion 120 is inspected, for example, to check the depth, shape, and size of the opening 121.
(5) And (5) entering mass production after checking is error-free.
The embodiment of the application provides a battery cell pole piece 100, this battery cell pole piece 100 is divided into main body portion 110 and pole ear portion 120, pole ear portion 120 is connected with main body portion 110, an opening 121 is formed on pole ear portion 120, opening 121 is located at a corner portion of pole ear portion 120 far from main body portion 110, the end of a track of laser cutting is located at the side edge of a pole ear, and the ratio range of the distance from the position of the end of the track at the side edge of the pole ear to the top edge of the pole ear to the total height of the pole ear is 1/3-2/5, so that in the process of cutting opening 121 by battery cell pole piece 100, a cutting line 126 is formed at the position of pole ear portion 120 corresponding to opening 121, one end of cutting line 126 is located at top edge 123, the other end of cutting line 126 is located at second side edge 125 of the pole ear, the swing of top edge 123 of pole ear portion 120 has little influence on the end of laser cutting, laser cutting track ending laser is located at laser non-volatile burnt, complete cutting of opening 121 is ensured, and then can avoid the condition that utmost point ear portion 120 adhesion leftover bits appear in normal high-speed production process, consequently can avoid because the short circuit that the leftover bits arouses to improve the security of electricity core 200.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
The above battery cell pole piece and the battery cell provided by the embodiment of the application are introduced in detail. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A cell pole piece, comprising:
a main body portion;
the tab part comprises a top edge, a bottom edge, a first side edge and a second side edge, the bottom edge is connected with the main body part, the top edge is located at a position where the tab part is far away from the main body part, one end of the first side edge and one end of the second side edge are connected with the main body part, and the other end of the first side edge and the other end of the second side edge are connected with the top edge; the number of the pole ear parts is more than two, and the pole ear parts are distributed at intervals along the length direction of the main body part; openings are formed in the two pole lug parts at intervals of S along the length direction of the main body part, and the openings are used for identifying a complete pole piece unit in a winding process, and the length of the pole piece unit is S; the opening is located utmost point ear is kept away from a bight of main part, utmost point ear portion corresponds open-ended position is formed with the cutting line, the one end of cutting line is located the topside, the other end of cutting line is located the second side, and the cutting line is located the distance of the tip of second side distance utmost point ear topside is H1, utmost point ear overall height is H2, and the scope of H1H 2 is 1/3-2/5.
2. The cell pole piece of claim 1, wherein:
the cutting line includes a first section connected to the second side edge and a second section connected to the top edge.
3. The cell pole piece of claim 2, wherein:
the lug portion further comprises a first sub-portion and a second sub-portion, the first side and the top side being located in the first sub-portion, the second side being located in the second sub-portion; a first section of the cutting line is located in the second sub-portion, and a second section of the cutting line is located in the first sub-portion; one part of the bottom edge is positioned in the first sub-portion, and the other part of the bottom edge is positioned in the second sub-portion.
4. The cell pole piece of claim 2, wherein: the cutting line is L-shaped, and the first section is perpendicular to the second section.
5. The cell pole piece of claim 4, wherein: the first section is parallel to the main body portion, and the second section is perpendicular to the main body portion.
6. The cell pole piece of claim 2, wherein: the included angle between the first section and the second section ranges from 30 degrees to 150 degrees.
7. The cell pole piece of claim 1, wherein: the cutting line is a curve.
8. The cell pole piece of claim 7, wherein: the cutting line is a circular arc line.
9. The cell pole piece of any one of claims 1 to 8, wherein: the main body is coated with positive electrode slurry or negative electrode slurry.
10. A cell comprising the cell pole piece of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121290091.9U CN215451700U (en) | 2021-06-09 | 2021-06-09 | Battery cell pole piece and battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121290091.9U CN215451700U (en) | 2021-06-09 | 2021-06-09 | Battery cell pole piece and battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215451700U true CN215451700U (en) | 2022-01-07 |
Family
ID=79710860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121290091.9U Active CN215451700U (en) | 2021-06-09 | 2021-06-09 | Battery cell pole piece and battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215451700U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583113A (en) * | 2022-03-03 | 2022-06-03 | 厦门海辰新能源科技有限公司 | Pole piece manufacturing method and pole piece |
| CN117102690A (en) * | 2023-07-31 | 2023-11-24 | 广东利元亨智能装备股份有限公司 | Tab forming method, die cutting machine, cutting and stacking integrated machine and electronic equipment |
-
2021
- 2021-06-09 CN CN202121290091.9U patent/CN215451700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114583113A (en) * | 2022-03-03 | 2022-06-03 | 厦门海辰新能源科技有限公司 | Pole piece manufacturing method and pole piece |
| CN117102690A (en) * | 2023-07-31 | 2023-11-24 | 广东利元亨智能装备股份有限公司 | Tab forming method, die cutting machine, cutting and stacking integrated machine and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210535760U (en) | Electrode assembly and secondary battery | |
| CN112310409B (en) | Electrode assembly and secondary battery | |
| CN215451700U (en) | Battery cell pole piece and battery cell | |
| CN201430189Y (en) | Lithium ion battery | |
| CN210224197U (en) | External welding type winding type button battery | |
| CN209401732U (en) | Electrode assembly and secondary cell | |
| CN105261781B (en) | Electrochemical cell and preparation method thereof | |
| CN210224213U (en) | Winding type button battery with integrated insulation tabs | |
| CN100588007C (en) | Closed battery | |
| CN210224214U (en) | Winding type button battery with insulating needle or metal needle electric core | |
| CN216120663U (en) | Secondary battery's electric core and secondary battery | |
| CN215644565U (en) | Pole piece, electric core structure and battery | |
| CN218299826U (en) | Pole piece, roll up core and battery | |
| CN113506878A (en) | Composite conductive current collector, electrode plate and lithium ion battery | |
| CN114447408A (en) | Battery and electronic equipment | |
| CN216648356U (en) | Pole piece and battery | |
| CN215680715U (en) | Lithium battery positive and negative plate structure and lithium battery | |
| CN114335407A (en) | Pole piece and battery | |
| CN208336372U (en) | Electrode plates, electrode assembly and secondary cell | |
| CN219832969U (en) | Electrode plate and battery | |
| CN212380471U (en) | Hard shell button cell | |
| CN218677196U (en) | Battery cell and lithium ion battery | |
| JP2010199029A (en) | Sealed battery | |
| CN217588983U (en) | Middle lug-outlet type positive plate, battery cell and battery | |
| CN203574063U (en) | Lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |