CN217788734U - Tab and soft package battery - Google Patents
Tab and soft package battery Download PDFInfo
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- CN217788734U CN217788734U CN202221695957.9U CN202221695957U CN217788734U CN 217788734 U CN217788734 U CN 217788734U CN 202221695957 U CN202221695957 U CN 202221695957U CN 217788734 U CN217788734 U CN 217788734U
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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 discloses a tab and soft package battery, the tab comprises a tab body, the tab body is provided with an outer tab section, an inner tab section and a buffer section, the buffer section is connected between the outer tab section and the inner tab section, the buffer section comprises at least one buffer groove section extending along the first direction of the tab body, and the cross section of the buffer section perpendicular to the first direction comprises an inner inclined section, a middle section and an outer inclined section which are connected in sequence; the inner inclined section is connected with the inner section of the tab, extends along a straight line and forms an obtuse angle with the inner section of the tab; the outer inclined section is connected with the outer section of the lug, extends along a straight line and forms an obtuse angle with an included angle between the outer section of the lug. According to the utility model discloses utmost point ear is through setting up the buffer segment to be the obtuse angle setting with the interior section of inclining of buffer slot section and utmost point ear interior section, be the obtuse angle setting with the outer section of inclining of buffer slot section and utmost point ear outer section, can promote laminate polymer battery's safety in utilization, make the manufacturing cost of utmost point ear lower.
Description
Technical Field
The utility model belongs to the technical field of the battery and specifically relates to a utmost point ear and laminate polymer battery are related to.
Background
Among the correlation technique, laminate polymer battery's utmost point ear is in the same place through the heat-seal with the plastic-aluminum membrane bonding, and when utmost point ear atress was dragged, the plastic-aluminum membrane very easily damaged with the heat-seal department of utmost point ear, caused laminate polymer battery weeping, reduced laminate polymer battery's safety in utilization.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a tab, through setting up the buffer segment to the interior slope section with the buffer slot section is the obtuse angle setting with the utmost point ear interior section, is the obtuse angle setting with the outer section of the outer slope section of buffer slot section and utmost point ear, can promote laminate polymer battery's safety in utilization, makes the manufacturing cost of utmost point ear lower.
The utility model also provides a laminate polymer battery who has above-mentioned utmost point ear.
According to the utility model discloses utmost point ear of first aspect embodiment for laminate polymer battery, utmost point ear includes: the tab body is provided with an outer tab section, an inner tab section and a buffer section, the buffer section is connected between the outer tab section and the inner tab section, the buffer section comprises at least one buffer groove section extending along a first direction of the tab body, and the cross section, perpendicular to the first direction, of the buffer section comprises an inner inclined section, a middle section and an outer inclined section which are sequentially connected; the inner inclined section is connected with the inner section of the tab, extends along a straight line and forms an obtuse angle with the inner section of the tab; the outer inclined section is connected with the outer section of the lug, extends along a straight line and forms an obtuse angle with an included angle between the outer sections of the lug.
According to the utility model discloses utmost point ear is through setting up the buffer segment to the interior slope section of buffer slot section is the obtuse angle setting with utmost point ear interior section, is the obtuse angle setting with the outer slope section of buffer slot section and utmost point ear outer section, can promote laminate polymer battery's safety in utilization, makes the manufacturing cost of utmost point ear lower.
According to some embodiments of the present invention, the buffer groove section is one, and the middle section is an arc.
According to some embodiments of the present invention, there are two buffer groove sections, two of the buffer groove sections have opposite opening directions, the two buffer groove sections are sequentially disposed between the outer section of the tab and the inner section of the tab and respectively are a first buffer groove section and a second buffer groove section, a cross section of the first buffer groove section perpendicular to the first direction includes the inner inclined section, the inner main body section and the first connection section which are sequentially connected, and a cross section of the second buffer groove section perpendicular to the first direction includes the outer inclined section, the outer main body section and the second connection section which are sequentially connected; wherein, first linkage segment with the second linkage segment links to each other, first linkage segment and the second linkage segment homogeneous phase is relative utmost point ear inner segment or utmost point ear outer segment slope sets up, and the angle of inclination is acute angle or obtuse angle, the second linkage segment with contained angle between the utmost point ear outer segment is acute angle or obtuse angle, connects gradually interior main part section first linkage segment the second linkage segment and outer main part section constitutes the interlude.
According to some embodiments of the invention, the inner body section and/or the outer body section is curved.
According to the utility model discloses a some embodiments, the perpendicular to of buffer segment the cross section of first direction still includes interior changeover portion and outer changeover portion, interior changeover portion is connected interior slope section with between the utmost point ear interior section, outer changeover portion is connected outer slope section with between the utmost point ear outer section, interior changeover portion with outer changeover portion all is the arc.
According to the utility model discloses a some embodiments, utmost point ear outer segment with utmost point ear inner segment is located the coplanar, utmost point ear outer segment buffering section and utmost point ear inner segment is in size on the first direction is the same.
According to the utility model discloses a some embodiments, the size scope of buffer slot section on the second direction is 0.2mm-1.5mm, the second direction perpendicular to first direction, the groove width scope of buffer slot section is 0.5-2mm, utmost point ear outer section and the thickness scope of utmost point ear inner section is 0.2mm-1.0mm, the wall thickness scope of buffer slot section is 0.2mm-1.0mm.
According to some optional embodiments of the utility model, utmost point ear outer segment with the buffering section is the aluminum sheet, the buffering section with utmost point ear outer segment integrated into one piece, the at least part of utmost point ear inner segment is the copper sheet.
In some optional embodiments of the utility model, the utmost point ear inner segment includes first utmost point ear inner segment and second utmost point ear inner segment, the second utmost point ear inner segment is connected first utmost point ear inner segment with between the buffer segment, first utmost point ear inner segment set up in second utmost point ear inner segment deviates from one side of buffer segment, first utmost point ear inner segment is the copper sheet, second utmost point ear inner segment is the aluminum sheet, second utmost point ear inner segment buffer segment with utmost point ear outer segment integrated into one piece.
According to the utility model discloses laminate polymer battery of second aspect embodiment includes: the battery body is coated with an outer wrapping film; according to the utility model discloses the utmost point ear of above-mentioned first aspect embodiment, utmost point ear inner segment set up in the outer covering film, utmost point ear outer segment set up in outside the outer covering film.
According to the utility model discloses laminate polymer battery through setting up foretell utmost point ear, can effectively avoid utmost point ear to cause laminate polymer battery weeping when being dragged the condition emergence, promotes laminate polymer battery's safety in utilization, reduction in production cost.
According to some embodiments of the utility model, utmost point ear inner segment includes first utmost point ear inner segment and second utmost point ear inner segment, second utmost point ear inner segment is connected first utmost point ear inner segment with between the buffer segment, first utmost point ear inner segment be suitable for with battery body's utmost point core utmost point ear is connected, part first utmost point ear inner segment and the surface of second utmost point ear inner segment covers has utmost point ear to glue, just utmost point ear glues and covers completely first utmost point ear inner segment with the junction of second utmost point ear inner segment.
According to some embodiments of the present invention, the electrode core tab of the battery body is a copper sheet.
Additional aspects and advantages of the invention 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a perspective view of a pouch battery according to some embodiments of the present invention;
fig. 2 is a perspective view of the tab of fig. 1;
fig. 3 is a perspective view of the tab body of fig. 2;
fig. 4 is a sectional view of the tab of fig. 2;
FIG. 5 is an enlarged view at A in FIG. 4;
fig. 6 is a perspective view of a tab according to another embodiment of the present invention;
fig. 7 is a sectional view of the tab of fig. 6;
fig. 8 is an enlarged view at B in fig. 6.
Reference numerals are as follows:
100. a pouch cell;
10. a tab;
1. a tab body;
11. an outer section of the tab; 12. an inner section of the tab; 121. a first tab inner section; 122. a second ear inner section; 13. a buffer section; 131. a buffer slot section; 131a, a first buffer slot section; 131b, a second buffer slot section; 1311. a middle section; 1311a, an inner body section; 1311b, a first connection section; 1311c, a second connection section; 1311d, outer body section; 1312. an inner inclined section; 1313. an outer inclined section; 1314. an inner transition section; 1315. an outer transition section;
2. gluing a tab;
20. a battery body.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
A tab 10 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 1 to 5, a tab 10 according to an embodiment of the present invention is used for a pouch battery 100, the pouch battery 100 includes a battery body 20 and the tab 10, and the battery body 20 is coated with an outer film, for example, the outer film may be an aluminum plastic film. Utmost point ear 10 includes utmost point ear body 1, and utmost point ear body 1 has utmost point ear outer section 11, utmost point ear inner section 12 and buffer segment 13, and buffer segment 13 is connected between utmost point ear outer section 11 and utmost point ear inner section 12, and buffer segment 13 is located the battery body 20 outside, and utmost point ear inner section 12 is in the same place with outer envelope bonding, and utmost point ear 10 can also include utmost point ear glue 2 for example, and utmost point ear glue 2 sets up in utmost point ear inner section 12, and utmost point ear 10 is in the same place with outer envelope bonding through utmost point ear glue 2.
When the tab 10 is pulled by a force, for example: when 11 atresss of utmost point ear are dragged, buffering section 13 can play the cushioning effect, and buffering section 13 can absorb the power of dragging that utmost point ear 10 received, prevents utmost point ear inner segment 12 and outer membrane separation, can prevent to lead to the fact destruction to utmost point ear 10 and outer membrane heat-seal district to can effectively avoid utmost point ear 10 to lead to the fact the condition of laminate polymer battery 100 weeping to take place when dragging, and then can promote laminate polymer battery 100's safety in utilization.
From this, through setting up buffer segment 13, when utmost point ear 10 atress was dragged, can prevent to lead to the fact destruction to utmost point ear 10 and outer envelope heat-seal district, can effectively avoid utmost point ear 10 to lead to the fact laminate polymer battery 100 weeping when being dragged the condition emergence to can promote laminate polymer battery 100's safety in utilization.
The buffering section 13 includes a buffering groove section 131, the buffering groove section 131 extends along a first direction (refer to an e1 direction in the drawing) of the tab body 1, the first direction is a width direction of the tab body 1, at least one buffering groove section 131 is provided, and a cross section of the buffering section 13 perpendicular to the first direction includes an inner inclined section 1312, a middle section 1311, and an outer inclined section 1313 connected in sequence.
The inner inclined section 1312 is connected with the tab inner section 12, the inner inclined section 1313 extends along a straight line, and an included angle between the inner inclined section 1312 and the tab inner section 12 is an obtuse angle; the outer inclined section 1313 is connected with the outer section 11 of the tab, the outer inclined section 1313 extends along a straight line, and an included angle between the outer inclined section 1313 and the outer section 11 of the tab is an obtuse angle. For example, the included angle between the outer angled section 1313 and the inner angled section 1312 may be an acute angle.
The inner inclined section 1312 and the tab inner section 12 are arranged at an obtuse angle, and when the buffer groove section 131 is formed by bending, the bending angle of the inner inclined section 1312 relative to the tab inner section 12 is smaller, so that the difficulty of the bending forming process can be reduced, and the buffer groove section 131 is convenient to bend and form. The outer inclined section 1313 and the tab outer section 11 are arranged in an obtuse angle, and the bending angle of the tab outer section 11 is smaller, so that the process difficulty of bending and forming can be reduced, and the buffer groove section 131 is convenient to bend and form.
Through setting up interior slope section 1312, interlude 1311 and the outer slope section 1313 that connects gradually, the structure of buffer slot section 131 is comparatively simple, and the processing technology degree of difficulty of buffer slot section 131 is lower, the shaping of being convenient for bend for the manufacturing cost of utmost point ear 10 is lower.
For example, the pouch battery 100 may be provided in a battery module, the battery module has a connecting sheet, the tab 10 is welded to the connecting sheet, the welding area s between the tab 10 and the connecting sheet is located on the tab outer section 11, and the pouch battery 100 is suitable for transmitting power to the whole battery module through the connecting sheet.
The buffer section 13 increases the length from the welding area s to the heat-sealing area of the tab 10 and the outer wrapping film, and reduces the influence of the heat of the outer section 11 of the welded tab and the connecting sheet on the sealing performance of the tab 10 and the heat-sealing area of the outer wrapping film under the condition of not prolonging the effective distance between the two.
According to the tab 10 provided by the embodiment of the utility model, by arranging the buffer section 13, when the tab 10 is pulled under stress, the tab 10 and the outer film heat-sealing area can be prevented from being damaged, and the occurrence of the liquid leakage of the soft package battery 100 caused by pulling the tab 10 can be effectively avoided, so that the use safety of the soft package battery 100 can be improved; the inner inclined section 1312 of the buffer groove section 131 and the inner tab section 12 are arranged in an obtuse angle mode, the outer inclined section 1313 of the buffer groove section 131 and the outer tab section 11 are arranged in an obtuse angle mode, the structure of the buffer groove section 131 is simple, the processing difficulty of the buffer groove section 131 is low, bending forming is facilitated, and therefore the production cost of the tab 10 is low.
Referring to fig. 1-4, according to some embodiments of the present invention, the buffer sections 13 extend to opposite sides of the tab body 1 along the first direction at both ends of the first direction, respectively. So design, when utmost point ear 10 is receiving external force to drag, the power of section 11 outside the utmost point ear is used, all need just can transmit to utmost point ear interior section 12 through buffer segment 13, can make buffer segment 13 reliable, absorb the power of section 11 outside the utmost point ear effectively, the buffering effect that buffer segment 13 played is showing to can prevent effectively to lead to the fact destruction to utmost point ear 10 and outer envelope heat-seal district, and then can further promote laminate polymer battery 100's safety in utilization.
Referring to fig. 4 and 5, according to some embodiments of the present invention, the tab outer section 11 and the tab inner section 12 are located in the same plane. That is to say, utmost point ear outer segment 11 and utmost point ear inner segment 12 parallel arrangement, and utmost point ear outer segment 11 and utmost point ear inner segment 12 are in same plane, when assembling laminate polymer battery 100, can make laminate polymer battery 100 convenient assembling.
The sizes of the lug outer section 11, the buffering section 13 and the lug inner section 12 in the first direction are the same, the width of the lug body 1 in the first direction is uniform, the lug body 1 is convenient to produce and manufacture, and the production cost is reduced. Design like this, when utmost point ear 10 is receiving external force and is dragging, can so make to use the outer section 11's of utmost point ear power, all need just can transmit extremely ear interior section 12 through buffer segment 13 to can make buffer segment 13 reliable, absorb the outer section 11's of utmost point ear power effectively, the buffering effect that buffer segment 13 played is showing, and then can prevent effectively that lead to the fact destruction to utmost point ear 10 and outer envelope heat-seal district, promote laminate polymer battery 100's safety in utilization.
Referring to fig. 5, according to some embodiments of the present invention, the buffer slot section 1311 is one, and the middle section 1311 is arc, and designs the middle section 1311 into arc, can prevent that the sharp corner from appearing in the buffer slot section 131, prevents that stress from concentrating at the sharp corner and leading to the stress fracture of buffer slot section 131, improves the structural strength of buffer slot section 131, prolongs the life of buffer slot section 131, promotes the safety in utilization of laminate polymer battery 100.
For example, the cross section of the buffer section 13 perpendicular to the first direction further includes an inner transition section 1314 and an outer transition section 1315, the inner transition section 1314 being connected between the inner sloping section 1312 and the inner tab section 12, the outer transition section 1315 being connected between the outer sloping section 1313 and the outer tab section 11, the inner transition section 1314 and the outer transition section 1315 each being arcuate.
Referring to fig. 6-8, according to some embodiments of the present invention, the buffer slot segments 131 are two, the opening directions of the two buffer slot segments 131 are opposite, the two buffer slot segments 131 are sequentially disposed between the tab outer segment 11 and the tab inner segment 12, and the two buffer slot segments 131 are respectively a first buffer slot segment 131a and a second buffer slot segment 131b, the cross section of the first buffer slot segment 131a perpendicular to the first direction includes an inner inclined segment 1312, an inner body segment 1311a, and a first connection segment 1311b, which are sequentially connected, and the cross section of the second buffer slot segment 132 perpendicular to the first direction includes an outer inclined segment 1313, an outer body segment 1311d, and a second connection segment 1311c, which are sequentially connected.
The first connection section 1311b is connected to the second connection section 1311c, the first connection section 1311b and the second connection section 1311c both extend along a straight line, the first connection section 1311b and the second connection section 1311c are arranged in a collinear manner, the first connection section 1311b and the second connection section 1311c are arranged in an inclined manner relative to the inner tab section 12 or the outer tab section 11, the inclined angle is an acute angle or an obtuse angle, and the inner main body section 1311a, the first connection section 1311b, the second connection section 1311c and the outer main body section 1311d which are connected in sequence form the middle section 1311.
The included angle between the first connection section 1311b and the inner section 12 of the tab is an acute angle or an obtuse angle, and the included angle between the second connection section 1311c and the outer section 11 of the tab is an acute angle or an obtuse angle. When the included angle between the first connecting section 1311b and the inner section 12 of the tab is an acute angle, the included angle between the second connecting section 1311c and the outer section 11 of the tab is an obtuse angle; when the included angle between the first connection section 1311b and the tab inner section 12 is an obtuse angle, the included angle between the second connection section 1311c and the tab outer section 11 is an acute angle.
With first linkage segment 1311b and second linkage segment 1311c collineation setting, interlude 1311's structure is simpler, can reduce interlude 1311's the processing technology degree of difficulty, and the shaping interlude 1311 of being convenient for buckle, the shaping utmost point ear body 1 of being convenient for buckle improves production efficiency, reduction in production cost.
Referring to fig. 6-8, according to some embodiments of the present invention, inner body section 1311a is arc-shaped, can prevent sharp corner from appearing at the junction of first linkage 1311b and inner body section 1311a in interlude 1311, prevent sharp corner from appearing at the junction of inner inclination section 1312 and inner body section 1311a in buffer 13, prevent stress from concentrating at sharp corner and leading to buffer 13 stress fracture, improve the structural strength of buffer 13, improve the structural strength of tab body 1, prolong the life of tab body 1, promote the safety in utilization of laminate polymer battery 100.
Referring to fig. 6-8, according to some embodiments of the present invention, the outer body section 1311d is arc-shaped, which can prevent sharp angle from appearing at the junction of the second connection section 1311c and the outer body section 1311d in the middle section 1311, prevent sharp angle from appearing at the junction of the outer inclined section 1313 and the outer body section 1311d in the buffer section 13, prevent stress from concentrating at the sharp angle and leading to stress fracture of the buffer section 13, improve the structural strength of the tab body 1, prolong the service life of the tab body 1, and improve the safety of the soft package battery 100.
Referring to fig. 5, according to some embodiments of the present invention, the size H of the buffer groove section 131 in the second direction ((see e2 in the drawing)) ranges from 0.2mm to 1.5mm, that is, the height H of the buffer groove section 131 ranges from 0.2mm to 1.5mm, the second direction is perpendicular to the first direction, the second direction is the thickness direction of the tab outer section 11 and the tab inner section 12, the groove width D1 of the buffer groove section 131 ranges from 0.5 mm to 2mm, the thickness D2 of the tab outer section 11 and the tab inner section 12 ranges from 0.2mm to 1.0mm, and the wall thickness D3 of the buffer groove section 131 ranges from 0.2mm to 1.0mm.
The wall thickness D3 of buffer slot section 131 is the same with the thickness D2 of outer section 11 of utmost point ear and utmost point ear interior section 12, and utmost point ear body 1 can be through bending forming technology integrated into one piece utmost point ear outer section 11, utmost point ear interior section 12 and buffer section 13, and processing technology is simple, can improve production efficiency, reduction in production cost.
If the thicknesses D2 of the tab outer section 11 and the tab inner section 12 are smaller, the wall thickness D3 of the buffer groove section 131 is smaller, the pulling force borne by the tab body 1 is smaller, and certain limitation can be caused on the input current and the output current of the soft package battery 100; if the thickness D2 of the tab outer section 11 and the tab inner section 12 is large, the wall thickness D3 of the buffer groove section 131 is large, which increases the material cost and reduces the overall energy density of the pouch battery 100. From this, set up the scope of the thickness D2 of section 11 and the utmost point ear inner section 12 outside the utmost point ear to 0.2mm-1.0mm, set up the wall thickness D3 of buffer slot section 131 to 0.2mm-1.0mm, can guarantee laminate polymer battery 100's wholeness ability, also can promote laminate polymer battery 100 whole energy density, save material cost.
According to the thickness D2 of the tab outer section 11 and the tab inner section 12 and the wall thickness D3 of the buffer groove section 131, if the groove width D1 of the buffer groove section 131 is too small, the buffer groove section 131 is not easy to form, and the stress of the buffer groove section 131 after forming is large, the buffer section 13 can be deformed by a large force, and the buffer effect on the tab 10 cannot be achieved; if the groove width D1 of the buffer groove section 131 is too large, the length of the whole pouch battery 100 is increased, and the overall energy density of the pouch battery 100 is reduced. If the height H of the buffer slot section 131 is too small, the buffer slot section 131 is not easy to form, and the stress of the formed buffer slot section 131 is large, so that the buffer section 13 can be deformed with a large force, and the buffer function cannot be realized for the soft package battery 100; if the height H of the buffer groove section 131 is too large, the material cost is increased and the thickness of the pouch battery 100 is also exceeded.
From this, through setting up the groove width D1 of buffer groove section 131 to 0.5-2mm, buffer groove section 131's high H sets up to 0.2mm-1.5mm, can guarantee that buffer section 13 has the cushioning effect, also can promote laminate polymer battery 100 whole energy density, can also save material cost, can also guarantee that the thickness of utmost point ear 10 does not surpass laminate polymer battery 100's thickness scope, can also guarantee laminate polymer battery 100's safety in utilization, thereby make buffer groove section 131's groove width D1's size, high H's size is reasonable.
The groove width D1 of the buffer groove segment 131 and the height H of the buffer groove segment 131 may be designed according to the thickness D2 of the tab outer segment 11 and the tab inner segment 12 and the wall thickness D3 of the buffer groove segment 131.
Referring to fig. 3 and 4, according to some optional embodiments of the present invention, the tab outer section 11 and the buffering section 13 are both aluminum sheets, and the buffering section 13 is integrally formed with the tab outer section 11. With buffer segment 13 and utmost point ear outer segment 11 integrated into one piece, buffer segment 13 and the utmost point ear outer segment 11 between be connected more reliably, can improve utmost point ear outer segment 11 and buffer segment 13 structural strength for buffer segment 13 plays the cushioning effect to the pulling force that utmost point ear 10 received reliably.
The outer section of utmost point ear 11 and buffer segment 13 all are located battery body 20's the outside, all set up outer section of utmost point ear 11 and buffer segment 13 into the aluminum sheet, can prevent that outer section of utmost point ear 11 and buffer segment 13 from becoming invalid because of the oxidation, guarantee the good electric conductivity of outer section of utmost point ear 11 and buffer segment 13, improve utmost point ear 10's life, guarantee laminate polymer battery 100's wholeness ability.
Compared with the electrode lug 10 with the outer electrode lug section 11 or the buffer section 13 made of copper sheets, the anti-oxidation protective film does not need to be plated on the outer electrode lug section 11 or the buffer section 13, the structure is simple, and the production cost is low.
The connecting sheet of the battery module is an aluminum sheet. The lug outer section 11 is set to be an aluminum sheet, the connecting sheet and the lug outer section 11 are made of the same metal material, the welding process difficulty of parts made of the same metal material is low, the lug outer section 11 and the connecting sheet of the battery module are conveniently welded together, the production efficiency is improved, and the production cost is reduced.
Referring to fig. 3 and 4, in some alternative embodiments of the present invention, at least a portion of the tab inner section 12 is a copper sheet. Laminate polymer battery 100's utmost point core utmost point ear is the copper sheet, and section 12 links to each other with laminate polymer battery 100's utmost point core utmost point ear in the utmost point ear, establishes the at least part of section 12 in the utmost point ear into the copper sheet, can reduce the welded technology degree of difficulty that is in the same place section 12 and the welding of utmost point core utmost point ear in the utmost point ear, is convenient for weld utmost point core utmost point ear in the utmost point ear together, improves production efficiency, reduction in production cost.
Referring to fig. 3 and 4, in some optional embodiments of the present invention, the tab inner section 12 includes a first tab inner section 121 and a second tab inner section 122, the second tab inner section 122 is connected between the first tab inner section 121 and the buffer section 13, the first tab inner section 121 is disposed on one side of the second tab inner section 122 departing from the buffer section 13, the first tab inner section 121 is a copper sheet, the first tab inner section 121 is suitable for being connected with a tab of a tab core, the second tab inner section 122 is an aluminum sheet, the second tab inner section 122, the buffer section 13 and the tab outer section 11 are integrally formed.
Set up first utmost point ear inner segment 121 to the copper sheet, second utmost point ear inner segment 122, buffer segment 13 and utmost point ear outer segment 11 are the aluminum sheet, can reduce the welded technology degree of difficulty that is in the same place connection piece and the welding of utmost point ear outer segment 11, reduce the welded technology degree of difficulty that is in the same place utmost point ear inner segment 12 and the welding of utmost point core utmost point ear, be convenient for with utmost point ear outer segment 11 and connection piece welding together, also be convenient for with utmost point ear inner segment 12 and the welding of utmost point core utmost point ear together, improve production efficiency, reduction in production cost.
Simultaneously, through setting up second utmost point ear interior section 122 to with second utmost point ear interior section 122, buffer segment 13 and utmost point ear outer segment 11 integrated into one piece, the connection between second utmost point ear interior section 122, buffer segment 13 and the utmost point ear outer segment 11 is more reliable, can improve second utmost point ear interior section 122, buffer segment 13 and utmost point ear outer segment 11 structural strength, makes buffer segment 13 play the cushioning effect to the power of dragging that utmost point ear 10 received reliably. Therefore, the forming difficulty of the buffer section 13 can be reduced, for example, the second tab inner section 122, the buffer section 13 and the tab outer section 11 can be integrally bent and formed, so that the production efficiency is improved, and the production cost is reduced.
Referring to fig. 1, according to the second aspect of the present invention, a pouch battery 100 includes: battery body and utmost point ear 10, battery body cladding have outer covering film, and utmost point ear 10 is according to the utility model discloses the utmost point ear 10 of above-mentioned first aspect embodiment, utmost point ear inner segment 12 sets up in outer covering film, and utmost point ear outer segment 11 sets up in outer covering film. For example, the outer wrapping film may be an aluminum plastic film, and the tab inner section 12 is bonded with the outer wrapping film.
According to the utility model discloses laminate polymer battery 100 through setting up foretell utmost point ear 10, can effectively avoid utmost point ear 10 to cause laminate polymer battery 100 weeping when being dragged the condition emergence, promotes laminate polymer battery 100's safety in utilization.
Referring to fig. 1-5, according to some embodiments of the present invention, the outer surface of the tab inner section 12 is provided with tab glue 2. The tab glue 2 is arranged on the tab inner section 12, and the tab 10 is bonded with the outer wrapping film through the tab glue 2. When the tab 10 is pulled by a force, for example: when 11 atresss of utmost point ear are dragged, buffering section 13 can play the cushioning effect, and buffering section 13 can absorb the power of dragging that utmost point ear 10 received, prevents that utmost point ear glue 2 and outer membrane separation, can prevent to lead to the fact destruction to utmost point ear 10 and outer membrane heat-seal district to can effectively avoid utmost point ear 10 to lead to the fact the condition of laminate polymer battery 100 weeping to take place when dragging, and then can promote laminate polymer battery 100's safety in utilization.
Referring to fig. 1-5, according to some embodiments of the present invention, the tab inner section 12 includes a first tab inner section 121 and a second tab inner section 122, the second tab inner section 122 is connected between the first tab inner section 121 and the buffer section 13, the first tab inner section 121 is adapted to be connected with a tab of a pole core of a battery body, the outer surfaces of the partial first tab inner section 121 and the second tab inner section 122 are covered with tab glue 2, and the tab glue 2 completely covers the junction of the first tab inner section 121 and the second tab inner section 122.
Therefore, the overall performance of the pouch battery 100 can be prevented from being reduced due to the fact that the first tab inner section 121 is exposed to the air and oxidized, and a protective layer (such as chrome plating or nickel plating) does not need to be plated on the surface of the first tab inner section 121, so that the production cost is reduced, and the overall performance of the pouch battery 100 is ensured.
According to the utility model discloses a some embodiments, battery body's utmost point core utmost point ear is the copper sheet, and copper sheet resistance is less, and the price is lower, can guarantee laminate polymer battery 100's wholeness ability for laminate polymer battery 100's manufacturing cost is lower.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. The utility model provides a utmost point ear, its characterized in that for laminate polymer battery, utmost point ear includes:
the tab body is provided with an outer tab section, an inner tab section and a buffer section, the buffer section is connected between the outer tab section and the inner tab section, the buffer section comprises at least one buffer groove section extending along a first direction of the tab body, and the cross section, perpendicular to the first direction, of the buffer section comprises an inner inclined section, a middle section and an outer inclined section which are sequentially connected;
the inner inclined section is connected with the inner section of the tab, extends along a straight line and forms an obtuse angle with the inner section of the tab; the outer inclined section is connected with the outer sections of the tabs, extends along a straight line and forms an obtuse angle with an included angle between the outer sections of the tabs.
2. The tab as claimed in claim 1, wherein the number of the buffer groove sections is one, and the middle section is arc-shaped.
3. The tab as claimed in claim 1, wherein the number of the buffer slot sections is two, the opening directions of the two buffer slot sections are opposite, the two buffer slot sections are sequentially arranged between the tab outer section and the tab inner section and are respectively a first buffer slot section and a second buffer slot section, the cross section of the first buffer slot section perpendicular to the first direction comprises the inner inclined section, the inner main body section and the first connection section which are sequentially connected, and the cross section of the second buffer slot section perpendicular to the first direction comprises the outer inclined section, the outer main body section and the second connection section which are sequentially connected;
wherein, first linkage segment with the second linkage segment links to each other, first linkage segment with the second linkage segment all extends and the collineation sets up along the straight line, first linkage segment and the second linkage segment homogeneous phase is relative utmost point ear inner segment or utmost point ear outer segment slope sets up, and the angle of inclination is acute angle or obtuse angle, connects gradually interior main part section first linkage segment the second linkage segment and outer main part section constitutes the interlude.
4. A tab as claimed in claim 3, wherein the inner and/or outer body sections are arcuate.
5. The tab as claimed in claim 1, wherein a cross section of the buffer section perpendicular to the first direction further comprises an inner transition section and an outer transition section, the inner transition section is connected between the inner inclined section and the tab inner section, the outer transition section is connected between the outer inclined section and the tab outer section, and the inner transition section and the outer transition section are both arc-shaped.
6. The tab as claimed in claim 1, wherein the tab outer section and the tab inner section are located in the same plane, and the sizes of the tab outer section, the buffer section and the tab inner section in the first direction are the same.
7. The tab as claimed in claim 1, wherein the size of the buffer groove section in the second direction is in the range of 0.2mm to 1.5mm, the second direction is perpendicular to the first direction, the groove width of the buffer groove section is in the range of 0.5 mm to 2mm, the thickness of the tab outer section and the tab inner section is in the range of 0.2mm to 1.0mm, and the wall thickness of the buffer groove section is in the range of 0.2mm to 1.0mm.
8. The tab as claimed in any one of claims 1 to 7, wherein the outer tab section and the buffer section are both aluminum sheets, the buffer section is integrally formed with the outer tab section, and at least part of the inner tab section is a copper sheet.
9. The tab of claim 8, wherein the tab inner section comprises a first tab inner section and a second tab inner section, the second tab inner section is connected between the first tab inner section and the buffer section, the first tab inner section is disposed on a side of the second tab inner section facing away from the buffer section, the first tab inner section is a copper sheet, the second tab inner section is an aluminum sheet, and the second tab inner section, the buffer section and the tab outer section are integrally formed.
10. A pouch cell, comprising:
the battery body is coated with an outer wrapping film;
the tab as claimed in any one of claims 1 to 9, the tab inner section being disposed inside the external wrapping film, and the tab outer section being disposed outside the external wrapping film.
11. The soft package battery of claim 10, characterized in that, the section in the utmost point ear includes first utmost point ear interior section and second utmost point ear interior section, the second utmost point ear interior section is connected first utmost point ear interior section with between the buffer segment, first utmost point ear interior section be suitable for with battery body's utmost point core utmost point ear is connected, part first utmost point ear interior section and the surface of second utmost point ear interior section covers has utmost point ear to glue, just utmost point ear glue covers completely first utmost point ear interior section with the junction of second utmost point ear interior section.
12. The pouch battery according to claim 10 or 11, wherein the pole core tab of the battery body is a copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221695957.9U CN217788734U (en) | 2022-06-30 | 2022-06-30 | Tab and soft package battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221695957.9U CN217788734U (en) | 2022-06-30 | 2022-06-30 | Tab and soft package battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217788734U true CN217788734U (en) | 2022-11-11 |
Family
ID=83936248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221695957.9U Active CN217788734U (en) | 2022-06-30 | 2022-06-30 | Tab and soft package battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217788734U (en) |
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2022
- 2022-06-30 CN CN202221695957.9U patent/CN217788734U/en active Active
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