CN219226552U - Electrode lug welding structure, middle-arranged battery cell and battery - Google Patents
Electrode lug welding structure, middle-arranged battery cell and battery Download PDFInfo
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- CN219226552U CN219226552U CN202223201448.9U CN202223201448U CN219226552U CN 219226552 U CN219226552 U CN 219226552U CN 202223201448 U CN202223201448 U CN 202223201448U CN 219226552 U CN219226552 U CN 219226552U
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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
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Abstract
The utility model relates to a battery cell in a tab, in particular to a tab welding structure, a battery cell in a tab and a battery, wherein the tab welding structure comprises a tab and a current collector, and also comprises an auxiliary welding structure, the tab, the current collector and the auxiliary welding structure are welded, the tab is arranged on one side of the current collector, and the auxiliary welding structure is arranged on the other side of the current collector. The utility model provides a utmost point ear welded structure uses supplementary welded structure, supplementary welded structure and utmost point ear, presss from both sides thinner collector in the centre and welds to solve the thinner collector and the utmost point ear direct welding of the electric core in the utmost point ear at present and having appeared a large amount of technical difficulties that have welded thoroughly and rosin joint, moreover, the welding is more firm, simultaneously, supplementary welded structure, the structure that thinner collector and utmost point ear were welded together entirely makes utmost point ear and collector contact better, reduces collector and utmost point ear contact resistance better, reduces electric core impedance better.
Description
Technical Field
The utility model relates to a battery cell arranged in a tab, in particular to a tab welding structure, a battery cell arranged in a tab and a battery.
Background
In recent years, with the development of lithium battery technology, lithium ion batteries are widely applied to digital products due to the characteristics of high working voltage, long cycle life, no memory effect and the like, but in the fields of mobile communication, notebook computers and IPad application, lithium batteries are required due to special requirements of products:
1. increasing the energy density;
2. the impedance of the battery cell is reduced.
So as to produce a battery core structure in the tab.
The lithium battery core in the tab has the same overall size, and under the condition of the same other performances, the larger the capacity of the lithium battery core is, the larger the competitiveness is, which means that thinner and thinner diaphragms and current collectors are adopted, and the thinner current collectors and the tab are directly welded, so that a large amount of through welding and virtual welding can occur, and huge quality failure cost is caused.
Disclosure of Invention
The utility model aims at: aiming at the problems that in the prior art, a thinner current collector and a tab are directly welded, a large number of through welding and virtual welding occur, and huge quality failure cost is caused, the utility model provides a tab welding structure, a tab middle-arranged battery cell and a battery.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a utmost point ear welded structure, includes utmost point ear and current collector, still includes auxiliary welded structure, utmost point ear, current collector and auxiliary welded structure are welded mutually, the utmost point ear set up in one side of current collector, auxiliary welded structure set up in the opposite side of current collector.
The application a utmost point ear welded structure, utmost point ear set up in one side of electric current collector, supplementary welded structure set up in the opposite side of electric current collector uses supplementary welded structure, supplementary welded structure and utmost point ear, press from both sides thinner electric current collector in the middle and weld, supplementary welded structure, electric current collector and utmost point ear are all welded together, a large amount of technical difficulties of welding and rosin joint appear in the thinner electric current collector and the utmost point ear direct welding of the electric core in solving present utmost point ear, moreover, the welding is more firm, simultaneously, supplementary welded structure, the whole structure of welding together of thinner electric current collector and utmost point ear makes utmost point ear and electric current collector contact better, reduce electric current collector and utmost point ear contact resistance better, reduce electric core impedance.
Preferably, the auxiliary welding structure is a sheet structure.
Preferably, a side of the auxiliary welding structure, which is far from the current collector, is provided with a first insulating structure.
The first insulating structure is used for protecting the diaphragm, so that the problem that the battery is short-circuited due to micro-contact of the anode and the cathode of the battery caused by the damage of the diaphragm by the auxiliary welding structure is avoided.
Preferably, a side of the auxiliary welding structure, which is close to the first insulation structure, is provided with at least one section of first corner angle, and the first insulation structure covers at least one section of first corner angle. The peripheral edge of the auxiliary welding structure is sharp, at least one section of edge angle on the auxiliary welding structure is covered by the first insulating structure, and the probability that the diaphragm is damaged by the edge angle on the auxiliary welding structure is reduced.
Preferably, the first insulating structure covers the auxiliary welding structure.
The auxiliary welding structure and the welding part clamp the thinner current collector in the middle for welding, so as to prevent the first insulating structure from puncturing the diaphragm and causing micro-contact of the anode and the cathode of the battery to cause short circuit of the battery, and the first insulating structure covers the auxiliary welding structure, thereby avoiding the problem that the diaphragm is damaged by the auxiliary welding structure and causes micro-contact of the anode and the cathode of the battery to cause short circuit of the battery.
Preferably, the first insulating structure is insulating gummed paper.
Preferably, the first insulating structure is bonded to the auxiliary welding structure.
Preferably, a welding part is arranged on the tab, and the welding part, the current collector and the auxiliary welding structure are welded.
Preferably, the auxiliary welding structure has the same width as the welding part.
Preferably, a side of the welding part, which is far away from the current collector, is provided with a second insulation structure.
And the second insulating structure is used for protecting the diaphragm, so that the problem that the diaphragm is damaged by the welding part to cause micro contact of the anode and the cathode of the battery and cause short circuit of the battery is avoided.
Preferably, a first welding spot is formed on the welding portion, the first welding spot is formed when the tab and the current collector are welded, and the second insulating structure covers the first welding spot.
The auxiliary welding structure and the welding part are used for welding the thinner current collector by sandwiching the thinner current collector, a first welding point is formed on the welding part, the first welding point can protrude, in order to prevent the first welding point from puncturing the diaphragm, causing micro contact of the anode and the cathode of the battery and causing short circuit of the battery, the second insulating structure covers the first welding point,
preferably, the welding part is provided with at least one section of second corner on one side close to the second insulating structure, and the second insulating structure covers at least one section of second corner so as to reduce the probability of the diaphragm being damaged by the corner on the welding part.
Preferably, the second insulating structure covers the welded portion. The problem of battery short circuit caused by micro contact of the anode and the cathode of the battery due to the fact that the diaphragm is damaged by the welding part is avoided.
Preferably, the second insulation structure is insulation gummed paper.
Preferably, the current collector is copper foil or aluminum foil.
Preferably, the current collector is copper foil, and the thickness of the copper foil is less than or equal to 6um.
Preferably, the current collector is aluminum foil, and the thickness of the aluminum foil is less than or equal to 8um.
The application also discloses a battery cell in utmost point ear, including utmost point ear welded structure as described in this application, one side that the mass flow body is close to auxiliary welded structure is provided with first pole piece material district, one side that the mass flow body is close to the utmost point ear is provided with second pole piece material district.
The application a battery cell in utmost point ear, owing to it includes this application utmost point ear welded structure to thinner collector and the utmost point ear direct welding of the battery cell in solving present utmost point ear appear a large amount of technical difficulties that have welded thoroughly and rosin joint, make utmost point ear and collector contact better moreover, reduce collector and utmost point ear contact resistance better, reduce electric core impedance better, thereby guarantee the quality of the battery cell in the utmost point ear better.
The application also discloses a battery, including the utmost point ear welded structure as described in this application, or including the electric core in the utmost point ear as described in this application.
The application a battery, because it includes this application utmost point ear welded structure or this application utmost point ear put electric core in to solve the current utmost point ear put thinner collector of electric core and utmost point ear direct welding and appear a large amount of technical difficulties that have welded thoroughly and rosin joint, make utmost point ear and collector contact better moreover, reduce collector and utmost point ear contact resistance better, reduce electric core impedance better, thereby guarantee the quality of battery better.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the application a utmost point ear welded structure, utmost point ear set up in one side of electric current collector, supplementary welded structure set up in the opposite side of electric current collector uses supplementary welded structure, supplementary welded structure and utmost point ear, press from both sides thinner electric current collector in the middle and weld, supplementary welded structure, electric current collector and utmost point ear are all welded together, a large amount of technical difficulties of welding and rosin joint appear in the thinner electric current collector and the utmost point ear direct welding of the electric core in solving present utmost point ear, moreover, the welding is more firm, simultaneously, supplementary welded structure, the whole structure of welding together of thinner electric current collector and utmost point ear makes utmost point ear and electric current collector contact better, reduce electric current collector and utmost point ear contact resistance better, reduce electric core impedance.
2. The application a battery cell in utmost point ear, owing to it includes this application utmost point ear welded structure to thinner collector and the utmost point ear direct welding of the battery cell in solving present utmost point ear appear a large amount of technical difficulties that have welded thoroughly and rosin joint, make utmost point ear and collector contact better moreover, reduce collector and utmost point ear contact resistance better, reduce electric core impedance better, thereby guarantee the quality of the battery cell in the utmost point ear better.
3. The application a battery, because it includes this application utmost point ear welded structure or this application utmost point ear put electric core in to solve the current utmost point ear put thinner collector of electric core and utmost point ear direct welding and appear a large amount of technical difficulties that have welded thoroughly and rosin joint, make utmost point ear and collector contact better moreover, reduce collector and utmost point ear contact resistance better, reduce electric core impedance better, thereby guarantee the quality of battery better.
Drawings
Fig. 1 is a schematic diagram of a matching structure of a current collector and a first pole piece material region and a second pole piece material region.
FIG. 2 is a schematic view of section A-A of FIG. 1 in accordance with the present utility model.
Fig. 3 is a schematic diagram of an assembly structure of an auxiliary welding structure and a current collector of the present utility model.
FIG. 4 is a schematic view of section B-B of FIG. 3 in accordance with the present utility model.
Fig. 5 is an enlarged schematic view of section E of fig. 4 in accordance with the present utility model.
Fig. 6 is a schematic structural view (no chamfer) of the auxiliary welding structure of the present utility model.
Fig. 7 is a schematic structural view (with chamfer) of the auxiliary welding structure of the present utility model.
Fig. 8 is a schematic view of the structure of the welded part (no chamfer) of the present utility model.
Fig. 9 is a schematic view of the structure of the welded part (with chamfer) of the present utility model.
Fig. 10 is a schematic view of the utility model in the direction C of fig. 4.
Fig. 11 is an enlarged schematic view of section D of fig. 10 in accordance with the present utility model.
Fig. 12 is a schematic diagram of an assembled structure of a first insulating structure and a second insulating structure of the present utility model.
FIG. 13 is a cross-sectional view of F-F of FIG. 12 in accordance with the present utility model.
Fig. 14 is a schematic structural view of a tab of the present utility model.
Icon: 1-electrode lugs; 2-current collector; 3-auxiliary welding structure; 4-a first insulating structure; 5-a second insulating structure; 6-a first welding spot; 8-tab glue; 9-the external terminal of the tab; 10-welding part; 11-welding ends; 12-a first side; 13-a first pole piece material area; 14-a second side; 15-a second pole piece zone; 20-a first corner; 21-second corner.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1-14, the tab welding structure according to this embodiment includes a tab 1, a current collector 2, and an auxiliary welding structure 3, where the tab 1, the current collector 2, and the auxiliary welding structure 3 are welded together, the tab 1 is disposed on one side of the current collector 2, and the auxiliary welding structure 3 is disposed on the other side of the current collector 2.
The auxiliary welding structure 3 and the tab 1 clamp the thinner current collector 2 in the middle for welding, the current collector 2 refers to copper foil and aluminum foil, wherein the thickness of the copper foil is less than or equal to 6um, and the thickness of the aluminum foil is less than or equal to 8um.
According to the tab welding structure, the tab 1 is arranged on one side of the current collector 2, the auxiliary welding structure 3 is arranged on the other side of the current collector 2, the auxiliary welding structure 3 is used for welding the thinner current collector 2 in the middle, the auxiliary welding structure 3, the current collector 2 and the tab 1 are welded together, so that the technical problems that a large number of through welding and virtual welding occur when the thinner current collector 2 of the battery cell in the current tab 1 is directly welded with the tab 1 are solved, the welding is firmer, meanwhile, the auxiliary welding structure 3, the thinner current collector 2 and the tab 1 are welded together, the tab 1 and the current collector 2 are better contacted, the contact resistance between the current collector 2 and the tab 1 is better reduced, and the impedance of the battery cell is better reduced.
Example 2
As shown in fig. 3 and 4, in a tab welding structure according to this embodiment, as a specific form of a tab welding structure according to embodiment 1, the tab 1 is a strip-shaped structure, the tab 1 is provided with a tab adhesive 8, an end portion of the tab 1 located at one side of the tab adhesive 8 is a tab external connection end 9, the other end is a welding end 11, the welding end 11 is a region overlapping with the current collector 2, the welding portion 10 is located at the welding end 11, may be a section of the welding end 11, may be located at an end of the welding end 11, the welding portion 10 is used for welding with the current collector 2, the auxiliary welding structure 3 is a sheet-shaped structure, more preferably, the auxiliary welding structure 3 is a strip-shaped metal sheet, such as an aluminum sheet and a nickel sheet, the width of the auxiliary welding structure 3 is the same as the width of the welding end 11 of the tab 1, the length of the auxiliary welding structure 3 is shorter than the length of the welding end 11 of the tab 1, but a preferred choice is to cover the region of the back of the current collector 2 corresponding to all the first welding points 6, and the first welding points 6 are formed when the tab 1 is formed by the current collector 2.
Example 3
As shown in fig. 10 to 13, a tab welding structure according to the present embodiment, as a specific form of a tab welding structure according to embodiment 1, is different from that of embodiment 2 in that: the side surface of the current collector 2, which is contacted with the auxiliary welding structure 3, is defined as a first side surface 12, a first insulating structure 4 is arranged on one side of the auxiliary welding structure 3, which is far away from the current collector 2, a diaphragm is protected by the first insulating structure 4, the first insulating structure 4 is preferably separated from the diaphragm, the diaphragm is prevented from being damaged by the auxiliary welding structure 3, the anode and the cathode of a battery are micro-contacted, and the problem of short circuit of the battery is caused, the first insulating structure 4 is preferably insulating gummed paper, the first insulating structure 4 is directly attached to the auxiliary welding structure 3, and no gap exists between the first insulating structure 4 and the auxiliary welding structure 3.
The area of the first insulating structure 4 covering the auxiliary welded structure 3 comprises at least the following two ways:
in a first mode, as shown in fig. 6 and 7, a side, close to the first insulation structure 4, of the auxiliary welding structure 3 is provided with at least one section of first corner 20, the first insulation structure 4 covers at least one section of the first corner 20, and the first corner 20 is a corner where at least two surfaces meet, and is located on a side, away from the current collector 2, of the auxiliary welding structure 3. The peripheral edge of the auxiliary welding structure 3 is sharp, at least one section of edge angle on the auxiliary welding structure 3 is covered by the first insulating structure 4, and the probability that the diaphragm is damaged by the edge angle on the auxiliary welding structure 3 is reduced.
In the second mode, the first insulating structure 4 covers the auxiliary welding structure 3, the auxiliary welding structure 3 and the welding portion 10 sandwich the thinner current collector 2 for welding, so as to prevent the auxiliary welding structure 3 from puncturing the diaphragm to cause micro-contact of the anode and the cathode of the battery and cause short circuit of the battery, so that the first insulating structure 4 covers the auxiliary welding structure 3 to avoid the problem that the diaphragm is damaged by the auxiliary welding structure 3 to cause micro-contact of the anode and the cathode of the battery and cause short circuit of the battery.
The first insulating structure 4 is bonded to the auxiliary soldering structure 3.
The beneficial effects of this embodiment are: the auxiliary welding structure 3 and the welding part 10 are used for welding the thinner current collector 2 in the middle, the peripheral edge of the auxiliary welding structure 3 is sharp, and in order to prevent the auxiliary welding structure 3 from puncturing the diaphragm and causing micro contact of the anode and the cathode of the battery to cause short circuit of the battery, the first insulating structure 4 is attached to the outer side of the auxiliary welding structure 3.
Example 4
As shown in fig. 10 to 14, a tab welding structure according to the present embodiment, as a specific form of a tab welding structure according to embodiment 1, is different from embodiment 2 or 3 in that: the electrode lug 1 is of a strip-shaped structure, the electrode lug 1 is provided with electrode lug glue 8, the end part of the electrode lug 1, which is positioned on one side of the electrode lug glue 8, is an electrode lug external connection end 9, the electrode lug external connection end 9 is an anode and a cathode of an electric core, the other end of the electrode lug external connection end is a welding end 11, the welding end 11 is an area overlapped with the current collector 2, the welding part 10 is positioned at the welding end 11 and can be a section of the welding end 11, the welding part 10 is used for welding with the current collector 2, the auxiliary welding structure 3 is of a sheet-shaped structure, the side surface, which is in contact with the current collector 2, of the electrode lug 1 is defined as a second side surface 14, the welding part 10, the current collector 2 and the auxiliary welding structure 3 are welded, and the second insulating structure 5 is preferably insulating glue paper.
On the basis of the above, in a further preferred mode, a second insulation structure 5 is arranged on one side of the welding part 10 away from the current collector 2, and the second insulation structure 5 is used for protecting the diaphragm, so that the problem that the battery is short-circuited due to the fact that the diaphragm is damaged by the welding part 10 and the anode and the cathode of the battery are in micro-contact is avoided.
The area of the second insulating structure 5 covering the welded portion 10 includes at least the following three ways:
in the first aspect, a first welding point 6 is formed on the welding portion 10, the first welding point 6 is formed when the tab 1 and the current collector 2 are welded, and the second insulating structure 5 covers the first welding point 6. The auxiliary welding structure 3 and the welding part 10 sandwich the thinner current collector 2 for welding, a first welding point 6 is formed on the welding part 10, the first welding point 6 protrudes, and in order to prevent the first welding point 6 from puncturing the diaphragm, the anode and the cathode of the battery are in micro contact, and the battery is short-circuited, so the second insulating structure 5 covers the first welding point 6.
In a second mode, as shown in fig. 8 and 9, a side of the welding portion 10 near the second insulating structure 5 is provided with at least one section of second corner 21, the second insulating structure 5 covers at least one section of the second corner 21, the second corner 21 is a corner at the intersection of at least two surfaces, and is located at the side of the welding portion 10 far away from the current collector 2, the peripheral edge of the welding portion 10 is relatively sharp, and the probability that the diaphragm is damaged by the corner on the welding portion 10 is reduced by covering at least one section of the second corner 21 by the second insulating structure 5.
In a third aspect, the second insulating structure 5 covers the welded portion 10. The problem of battery short circuit caused by micro contact of the anode and the cathode of the battery due to the damage of the diaphragm by the welding part 10 is avoided.
The beneficial effects of this embodiment are: the auxiliary welding structure 3 and the welding part 10 are used for welding the thinner current collector 2 in the middle, a first welding point 6 is formed on the welding part 10, the first welding point 6 is protruded, in addition, the peripheral edge of the welding end 11 is sharp, in order to prevent the first welding point 6 or the peripheral edge of the welding end 11 from puncturing the diaphragm, so that the anode and the cathode of the battery are slightly contacted and the battery is short-circuited, a second insulating structure 5 is attached to one side, far away from the current collector 2, of the welding part 10, the second insulating structure 5 is directly attached to the welding part 10, and the welding part 10 is fully covered, and the following preferable conditions are that: there is no gap between the second insulating structure 5 and the welded portion 10.
Example 5
As shown in fig. 1-14, the battery cell in the tab according to the present embodiment includes the tab welding structure according to embodiment 1, 2, 3 or 4, a first electrode sheet material area 13 is disposed on a side of the current collector 2 close to the auxiliary welding structure 3, and a second electrode sheet material area 15 is disposed on a side of the current collector 2 close to the tab 1.
Specifically, the side surface of the current collector 2, which is in contact with the auxiliary welding structure 3, is defined as a first side surface 12, the side surface of the current collector 2, which is in contact with the tab 1, is defined as a second side surface 14, a first pole piece material region 13 is arranged on the first side surface 12, and when the first insulating structure 4 is provided, the first insulating structure 4 is overlapped with the first pole piece material region 13 positioned on at least one side of the auxiliary welding structure 3.
Further, the two sides of the auxiliary welding structure 3 are respectively provided with a first pole piece material area 13, and the first insulating structure 4 is in homogeneous lap joint with the first pole piece material areas 13 positioned at the two sides of the auxiliary welding structure 3.
The first pole piece material areas 13 on two sides of the auxiliary welding structure 3 are connected into a whole.
The second side 14 is provided with a second pole piece area 15, and when provided with a second insulating structure 5, the second insulating structure 5 overlaps the second pole piece area 15 located on at least one side of the weld 10.
Further, second pole piece material areas 15 are arranged on two sides of the welding portion 10, and the second insulating structure 5 is in lap joint with the second pole piece material areas 15 located on two sides of the welding portion 10.
The second pole piece material areas 15 on two sides of the welding part 10 are connected into a whole.
In this embodiment, the electrode lug welding structure according to the embodiment 1, 2, 3 or 4 is included, the electrode lug 1 is disposed on one side of the current collector 2, the auxiliary welding structure 3 is disposed on the other side of the current collector 2, the auxiliary welding structure 3 is used to weld the thinner current collector 2 in the middle, the auxiliary welding structure 3, the current collector 2 and the electrode lug 1 are all welded together, so as to solve the technical problem that a large number of penetration welding and virtual welding occur when the thinner current collector 2 and the electrode lug 1 of the electrode lug 1 are directly welded, and the welding is more firm, meanwhile, the auxiliary welding structure 3, the thinner current collector 2 and the electrode lug 1 are all welded together, so that the electrode lug 1 and the current collector 2 are better contacted, the contact resistance of the current collector 2 and the electrode lug 1 is better reduced, the impedance of the electrode lug is better reduced, and the quality of the electrode lug is better ensured.
Example 6
As shown in fig. 1-14, a battery according to this embodiment includes the tab welding structure described in embodiment 1, 2, 3 or 4, or includes the tab middle-set battery cell described in embodiment 5, the tab 1 is disposed on one side of the current collector 2, the auxiliary welding structure 3 is disposed on the other side of the current collector 2, the auxiliary welding structure 3 is used, the auxiliary welding structure 3 and the tab 1 are used to weld the thinner current collector 2 in the middle, and the auxiliary welding structure 3, the current collector 2 and the tab 1 are all welded together, so as to solve the technical problems that a large number of through-welds and cold-welds occur when the thinner current collector 2 of the battery cell in the current tab 1 is directly welded with the tab 1, and the welding is more firm, meanwhile, the auxiliary welding structure 3, the thinner current collector 2 and the tab 1 are all welded together, so that the current collector 2 and the tab 1 are better contacted, the contact resistance of the current collector 2 and the tab 1 is better reduced, the battery cell resistance is better, and the battery cell quality is better guaranteed, and the battery quality is better guaranteed.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (18)
1. The utility model provides a utmost point ear welded structure, includes utmost point ear (1) and current collector (2), its characterized in that still includes auxiliary welded structure (3), utmost point ear (1), current collector (2) and auxiliary welded structure (3) weld mutually, utmost point ear (1) set up in one side of current collector (2), auxiliary welded structure (3) set up in the opposite side of current collector (2).
2. A tab welding structure according to claim 1, characterized in that the auxiliary welding structure (3) is a sheet-like structure.
3. A tab welding structure according to claim 1, characterized in that the side of the auxiliary welding structure (3) remote from the current collector (2) is provided with a first insulating structure (4).
4. A tab welding structure according to claim 3, wherein the auxiliary welding structure (3) has at least one first corner (20) on a side thereof adjacent to the first insulating structure (4), and the first insulating structure (4) covers at least one first corner (20).
5. A tab welding structure according to claim 3, characterized in that the first insulating structure (4) covers the auxiliary welding structure (3).
6. A tab welding structure according to any one of claims 3-5, wherein the first insulating structure (4) is insulating glue.
7. A tab welding structure according to any one of claims 3-5, wherein the first insulating structure (4) is bonded to the auxiliary welding structure (3).
8. The tab welding structure according to claim 1, wherein a welding portion (10) is provided on the tab (1), and the welding portion (10), the current collector (2) and the auxiliary welding structure (3) are welded.
9. A tab welding structure according to claim 8, wherein the auxiliary welding structure (3) has the same width as the welding portion (10).
10. A tab welding structure according to claim 8, characterized in that the side of the welding part (10) remote from the current collector (2) is provided with a second insulating structure (5).
11. The tab welding structure according to claim 10, wherein a first welding point (6) is formed on the welding portion (10), the first welding point (6) is formed when the tab (1) and the current collector (2) are welded, and the second insulating structure (5) covers the first welding point (6).
12. A tab welding structure according to claim 10, wherein the welding portion (10) has at least one second corner (21) on a side thereof adjacent to the second insulating structure (5), and the second insulating structure (5) covers at least one second corner (21).
13. A tab welding structure according to claim 10, characterized in that the second insulating structure (5) covers the weld (10).
14. A tab welding structure according to any one of claims 10-13, wherein the second insulating structure (5) is insulating glue.
15. The tab welding structure according to any one of claims 1 to 5 and 8 to 13, wherein the current collector (2) is copper foil or aluminum foil.
16. The tab welding structure according to any one of claims 1 to 5 and 8 to 13, wherein the current collector (2) is copper foil, and the thickness of the copper foil is less than or equal to 6um; or alternatively, the first and second heat exchangers may be,
the current collector (2) is aluminum foil, and the thickness of the aluminum foil is less than or equal to 8um.
17. The battery cell in the tab is characterized by comprising the tab welding structure as claimed in any one of claims 1-16, wherein a first pole piece material area (13) is arranged on one side, close to the auxiliary welding structure (3), of the current collector (2), and a second pole piece material area (15) is arranged on one side, close to the tab (1), of the current collector (2).
18. A battery comprising the tab welding structure of any one of claims 1-16 or comprising the tab-mounted cell of claim 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201448.9U CN219226552U (en) | 2022-11-29 | 2022-11-29 | Electrode lug welding structure, middle-arranged battery cell and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201448.9U CN219226552U (en) | 2022-11-29 | 2022-11-29 | Electrode lug welding structure, middle-arranged battery cell and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219226552U true CN219226552U (en) | 2023-06-20 |
Family
ID=86733868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223201448.9U Active CN219226552U (en) | 2022-11-29 | 2022-11-29 | Electrode lug welding structure, middle-arranged battery cell and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219226552U (en) |
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2022
- 2022-11-29 CN CN202223201448.9U patent/CN219226552U/en active Active
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