CN115832632A - Pole piece, electric core, battery and electric equipment - Google Patents
Pole piece, electric core, battery and electric equipment Download PDFInfo
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- CN115832632A CN115832632A CN202211371202.8A CN202211371202A CN115832632A CN 115832632 A CN115832632 A CN 115832632A CN 202211371202 A CN202211371202 A CN 202211371202A CN 115832632 A CN115832632 A CN 115832632A
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- 238000003466 welding Methods 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 210000005069 ears Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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 invention discloses a pole piece, a battery cell, a battery and electric equipment, wherein the pole piece comprises: the pole piece comprises a pole piece body, wherein a plurality of die-cut tabs are formed on the pole piece body, are arranged at intervals along a first direction and can be stacked; the flow guide lug comprises a first body and a second body, the first body is arranged on the pole piece body, a first welding area welded with the pole piece body is formed on the first body, the second body protrudes out of the pole piece body, and a second welding area welded with the die-cutting lug is formed on the second body. The pole piece can reduce the size space occupation ratio of the die-cutting lug, improve the energy density and improve the integral welding strength of the flow guide lug and the die-cutting lug.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a pole piece, a battery core, a battery and electric equipment.
Background
Among the correlation technique, introduced a plurality of utmost point ears in the structure of current promotion electric core multiplying power, with a plurality of utmost point ears folding back unified welding one-tenth piece, in order to guarantee the welding strength of utmost point ear and the current-carrying capacity of weld position, the seal of welding on the utmost point ear is highly big, leads to the cross cutting area of utmost point ear great, and energy density is on the low side.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a pole piece, which can improve the welding strength of the tab, reduce the size of the die-cut tab, and improve the energy density.
The invention also aims to provide a battery cell to apply the pole piece.
The invention also aims to provide a battery, so as to apply the battery core.
The invention also aims to provide an electric device to apply the battery.
The pole piece according to the embodiment of the invention comprises: the pole piece comprises a pole piece body, wherein a plurality of die-cut tabs are formed on the pole piece body, the die-cut tabs are arranged at intervals along a first direction, and the die-cut tabs can be stacked; the flow guide lug comprises a first body and a second body, the first body is arranged on the pole piece body, a first welding area welded with the pole piece body is formed on the first body, the second body is protruded out of the pole piece body, and a second welding area welded with the die-cutting lug is formed on the second body.
According to the pole piece provided by the embodiment of the invention, the flow guide pole lug comprising the first body and the second body is arranged, the first body is arranged on the pole piece body, the first welding area welded with the pole piece body is formed on the first body, the second body is arranged by protruding out of the pole piece body, and the second welding area welded with the die-cut pole lug is formed on the second body, so that the size space occupation ratio of the die-cut pole lug can be reduced, the energy density is improved, and the integral welding strength of the flow guide pole lug and the die-cut pole lug is improved.
In some embodiments, the flow tabs extend in a second direction, the second direction being perpendicular to the first direction, the length of the first weld zone being greater than the length of the second weld zone in the second direction. On the premise of ensuring the same current-carrying capacity, the width of a welding line is basically fixed during welding, and the length of the first welding area is larger, so that the area of the first welding area is larger, the welding strength of the flow guide pole lug is higher, and the safety is higher.
In some embodiments, the length of the second weld zone in the second direction is 0.5 to 10mm.
In some embodiments, the length of the second weld zone in the second direction is 1 to 3mm.
In some embodiments, the length of the first weld zone in the second direction is 4 to 6mm.
In some embodiments, the flow guide tabs extend along a second direction, the second direction is perpendicular to the first direction, the lengths of the plurality of die-cutting tabs in the second direction are equal, and the length of the second body is greater than the length of the die-cutting tabs. The lengths of the plurality of die-cutting tabs in the second direction are equal, so that the top of the stacked die-cutting tabs can be flush and regular, and the die-cutting tabs are convenient to assemble. The length of the second body is larger than that of the die-cutting lug, so that the part of the flow guide lug which leaks outwards has sufficient allowance, and the flow guide lug can be externally connected with other electric connecting components.
In some embodiments, the flow guide tab extends in a second direction, the second direction being perpendicular to the first direction, the second body having a length greater than the first body in the second direction. Through the mode, the length of the first body can be ensured not to be too large, and the overall length of the flow guide lug is favorably reduced.
In some embodiments, the pole piece body has a first end portion, a middle portion, and a second end portion disposed along the first direction, the first body being disposed on at least one of the first end portion, the middle portion, and the second end portion.
In some embodiments, when the first body is disposed in the middle portion, the plurality of die-cut tabs are disposed on two sides of the second body and are symmetrically disposed about the second body. Through the mode, the quantity of the die-cutting lugs folded at one time can be reduced, and the processing difficulty of the die-cutting lugs is reduced.
In some embodiments, the first body and the second body each have a thickness of 0.05 to 0.1mm.
The battery cell according to the embodiment of the invention comprises the pole piece.
According to the battery cell provided by the embodiment of the invention, the size space ratio of the die-cutting lug can be reduced through the pole piece, the energy density is improved, the integral welding strength formed by the flow guide lug and the die-cutting lug is improved, and the quality of the battery cell is favorably improved.
The battery according to the embodiment of the invention comprises a plurality of battery cells.
The electric equipment according to the embodiment of the invention comprises the battery.
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 schematic structural diagram of a pole piece according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flow guide tab according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a pole piece after die-cut tab stacking according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a pole piece according to a second embodiment of the present invention;
fig. 5 is a schematic structural view of a pole piece after die-cut tab stacking according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a battery cell in an embodiment of the present invention.
Reference numerals:
100. pole pieces;
10. a pole piece body; 101. die cutting of the tab; 101a, top edge;
20. flow guiding tabs; 210. a first body; 210a, a first welding area; 220. a second body; 220a, a second welding area;
1000. an electric core; c. a centerline; 2. a negative plate; 3. a diaphragm.
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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
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", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The battery cell is an electrochemical cell containing a positive electrode and a negative electrode, and the battery cell is different from a single battery cell in that the single battery cell contains a protection circuit and a shell, the single battery cell can be directly used, and the battery cell cannot be directly used generally. The battery cell generally comprises a positive plate, a diaphragm and a negative plate, wherein the positive plate, the diaphragm, the negative plate and the diaphragm are sequentially laminated together to form the battery cell. In order to improve the multiplying power of the battery cell, a plurality of tabs are introduced into the pole piece, the tabs are folded and welded in a unified manner, the size of a welding area on each common tab is large and the energy density is low in order to ensure the welding strength and the current carrying capacity of a welding position, and meanwhile, in order to ensure that the tab can have a large-area welding area, the size of the tab is also large and the space occupation ratio is high.
The research of the applicant finds that the external tab is added on the pole piece, and the external tab is respectively welded with the pole piece and the pole tab, so that the welding strength can be ensured, the size of a welding area of the pole tab can be reduced, the energy density is improved, and the reduction of the size of the pole tab on the pole piece is facilitated.
Referring now to fig. 1-5, a pole piece 100 according to an embodiment of the present invention is described.
As shown in fig. 1 to 3, a pole piece 100 according to an embodiment of the present invention includes a pole piece body 10 and a flow guide tab 20.
A plurality of die-cut tabs 101 are formed on the pole piece body 10, the die-cut tabs 101 are arranged at intervals along a first direction, and the die-cut tabs 101 can be stacked. The flow guide tab 20 comprises a first body 210 and a second body 220, the first body 210 is arranged on the pole piece body 10, a first welding area 210a welded with the pole piece body 10 is formed on the first body 210, the second body 220 protrudes out of the pole piece body 10, and a second welding area 220a welded with the die-cutting tab 101 is formed on the second body 220.
The "electrode sheet body 10" may refer to a sheet obtained by coating a conductive active material on a substrate, followed by drying and cutting in an oven. The pole piece 100 can be a positive pole piece or a negative pole piece, and when the pole piece 100 is the positive pole piece, the base material of the positive pole piece can be aluminum foil; when the tab 100 is a negative tab, the substrate of the negative tab may be a copper foil.
The "die-cut tab 101" may refer to a tab obtained by die-cutting the pole piece body 10.
The "first direction" may refer to a long side direction or a short side direction of the pole piece body 10, and may be specifically set as needed, for example, the first direction may be a left-right direction in fig. 1, that is, a long side direction of the pole piece body 10.
The current-guiding tab 20 may be a strip-shaped sheet, and the current-guiding tab 20 is made of a conductive metal material and is used for leading out current. "first body 210" and "second body 220" may refer to the sheet material divided into two parts, the first body 210 abutting the pole piece body 10, and the second body 220 outside the pole piece body 10 abutting the stacked die-cut tabs 101. It should be noted that the flow-guide tabs 20 and the die-cut tabs 101 in fig. 3 are only illustrated, and for the sake of easy understanding, they are illustrated in a strip shape instead of a linear shape.
The "first welding region 210a" may refer to a region where the first body 210 and the pole piece body 10 are welded, i.e., a portion where the first body 210 and the pole piece body 10 are connected after being melted. The shape of the first welding region 210a may be rectangular, circular, square, or other shapes, and is not limited herein.
The "second welding region 220a" may refer to a region where the second body 220 and the die-cut tab 101 are welded to be connected, i.e., a portion where the second body 220 and the die-cut tab 101 are connected after being melted. The shape of the second welding area 220a may be rectangular, circular, square, or other shapes, and is not limited herein.
The first welding area 210a and the second welding area 220a enable the flow guide tab 20 to have two welding point positions, so that the welding strength of the tab can be improved, and the flow guide tab 20 is used as a part for leading out current, and has more contact surfaces with the pole piece body 10 and the die-cutting tab 101, so that the current-carrying area can be increased. Secondly, because of the addition of the flow guide pole ear 20, the thickness of a pole ear group formed by the flow guide pole ear 20 and the die cutting pole ear 101 is increased, and the welding safety can be ensured. On the premise of ensuring the same current-carrying capacity, the second welding area 220a between the second body 220 and the die-cutting tab 101 can be designed to be smaller, so that the size of the die-cutting tab 101 can be reduced, and the energy density can be improved.
According to the pole piece 100 of the embodiment of the invention, the flow guide pole lug 20 comprising the first body 210 and the second body 220 is arranged, the first body 210 is arranged on the pole piece body 10, the first welding area 210a welded with the pole piece body 10 is formed on the first body 210, the second body 220 is arranged by protruding the pole piece body 10, and the second welding area 220a welded with the die-cut pole lug 101 is formed on the second body 220, so that the size space ratio of the die-cut pole lug 101 can be reduced, the energy density is improved, and the integral welding strength of the flow guide pole lug 20 and the die-cut pole lug 101 is improved.
In some embodiments, as shown in fig. 1 and 2, the flow guide tab 20 extends in a second direction, the second direction being perpendicular to the first direction, and the length of the first welding region 210a is greater than the length of the second welding region 220a in the second direction.
In conjunction with the foregoing, the "second direction" may refer to the width direction of the pole piece body 10, i.e., the up-down direction of the pole piece body 10 in fig. 1. Of course, the second direction may be other directions, and may be specifically set as required, and only the direction perpendicular to the first direction is required. On the premise of ensuring the same current-carrying capacity, the width of the welding seam is basically consistent during welding, and the length of the first welding region 210a is larger, so that the area of the first welding region 210a is larger, the welding strength of the flow guide pole ear 20 is higher, and the safety is higher.
That is, the welding area of the first welding region 210a can be increased, the welding area of the second welding region 220a can be decreased, and the energy density can be increased by "the length of the first welding region 210a is greater than the length of the second welding region 220 a".
In some embodiments, the length of the second welding region 220a in the second direction is 0.5 to 10mm. That is, the length of the second welding region 220a may be any one of 0.5mm, 1mm, 2mm, 2.5mm, 3.5mm, 4mm, 5.25mm, 6mm, 7mm, 8.5mm, 9mm, and 10mm, and may be selected as necessary. Of course, this is merely an example, and the length of the second welding region 220a in the second direction may be any value within a range of 0.5 to 10mm, which is not described herein again.
In some embodiments, the length of the second welding region 220a in the second direction is 1 to 3mm. That is, the length of the second welding region 220a may be any one of 1mm, 1.5mm, 2mm, 2.5mm, and 3mm, and may be selected as necessary. Of course, this is merely an example, and the length of the second welding region 220a in the second direction may be any value within a range of 1 to 3mm, which is not described in detail herein.
In some embodiments, the length of the first welding region 210a in the second direction is 4 to 6mm. That is, the length of the first welding region 210a may be any one of 4mm, 4.5mm, 5mm, 5.5mm, and 6mm, and may be selected as necessary. Of course, the length of the first welding region 210a in the second direction is any value within the range of 4 to 6mm, and is not described in detail herein.
In some embodiments, as shown in fig. 1, the flow guide tab 20 extends along a second direction perpendicular to the first direction, in which the lengths of the plurality of die-cut tabs 101 are equal, and the length of the second body 220 is greater than the length of the die-cut tabs 101. After being stacked, the plurality of die-cutting lugs 101 can be flush and regular at the top, and subsequent assembly operation is facilitated. The length of the second body 220 is greater than that of the die-cut tab 101, so that sufficient allowance can be left on the exposed part of the flow guide tab 20, and convenience is provided for externally connecting other parts of the flow guide tab 20.
In some embodiments, the widths of the plurality of die-cut tabs 101 in the first direction are equal, so that the plurality of die-cut tabs 101 can be completely overlapped when stacked, which can improve the regularity and facilitate the subsequent assembly operation.
In some embodiments, as shown in fig. 2, the flow guide tab 20 extends in a second direction perpendicular to the first direction, and the length of the second body 220 is greater than the length of the first body 210 in the second direction. The second body 220 is used for welding the die-cutting tab 101 and is connected with other external parts, the first body 210 is used for welding the pole piece body 10, the length of the second body 220 is larger than that of the first body 210, the overlong length of the first body 210 is avoided, the overall length of the flow guide tab 20 is favorably reduced, materials are saved, and the welding efficiency is improved.
In some embodiments, the pole piece body 10 has a first end, a middle, and a second end disposed along a first direction, the first body 210 being disposed on at least one of the first end, the middle, and the second end. Referring to the foregoing, the first direction may refer to a left-right direction in fig. 1, the first end may refer to a leftmost end of the pole piece body 10, the second end may refer to a rightmost end of the pole piece body 10, and the position of the first body 210 on the pole piece body 10 may include the following cases:
for example, as shown in fig. 1, the first body 210 may be welded to the first end, the pole piece body 10 is made into a roll core by folding or winding, and when the pole piece body 10 is wound from right to left, a plurality of die-cut tabs 101 are stacked together and then welded to the second body 220, so as to improve the processing efficiency of the stacked die-cut tabs 101.
For example, the first body 210 may be welded to the second end, and as described above, the pole piece body 10 may be wound from left to right, which also improves the efficiency of the process of folding the die-cut tab 101.
For example, as shown in fig. 4, the first body 210 may be welded on the middle portion.
For example, the first body 210 may be welded to the first end portion and the second end portion, that is, the number of the first bodies 210 is two, and the first bodies are respectively provided on the first end portion and the second end portion.
For example, the first bodies 210 may be welded on the first end portion and the middle portion, that is, the number of the first bodies 210 is two, provided on the first end portion and the middle portion, respectively.
For example, the first bodies 210 may be welded to the middle portion and the second end portion, that is, the number of the first bodies 210 is two, and the first bodies are respectively provided on the middle portion and the second end portion.
For example, the first body 210 may be welded on the first end portion, the middle portion and the second end portion, that is, the number of the first body 210 is three, respectively provided on the first end portion, the middle portion and the second end portion.
In some embodiments, as shown in fig. 4, when the first body 210 is disposed at the middle portion, the plurality of die-cut tabs 101 are disposed at both sides of the second body 220 and are symmetrically disposed about the second body 220.
As shown in fig. 4 and 5, the number of the die-cut tabs 101 is four, two die-cut tabs are disposed on the left side of the flow-guide tab 20, the remaining two die-cut tabs are disposed on the right side of the flow-guide tab 20, the left side portion of the pole piece body 10 is folded in half from left to right with respect to the two die-cut tabs 101, and then folded toward the flow-guide tab 20, and then the right side portion of the pole piece body 10 is folded in half from right to left with respect to the two die-cut tabs 101, and then folded toward the flow-guide tab 20. Through the mode, four die-cutting tabs 101 can be prevented from being folded at one time, and the processing difficulty of the folded die-cutting tabs 101 is reduced. It should be noted that the flow-guide tabs 20 and the die-cut tabs 101 in fig. 5 are only illustrated, and for the sake of easy understanding, they are illustrated in a strip shape instead of a linear shape.
It can be understood that, by the way that the plurality of die-cutting tabs 101 are arranged on two sides of the second body 220 and symmetrically arranged about the second body 220, the number of the die-cutting tabs 101 folded at one time can be reduced, the die-cutting tabs 101 can be folded for multiple times, and the difficulty of folding the die-cutting tabs 101 is reduced.
In some embodiments, the first body 210 and the second body 220 each have a thickness of 0.05 to 0.1mm. That is, the first body 210 and the second body 220 have the same thickness, and both may have any one of 0.05mm, 0.06mm, 0.07mm, 0.075mm, 0.08mm, 0.09mm, and 0.1mm, and may be selected as needed. Of course, the thicknesses of the first body 210 and the second body 220 are only examples, and any value in the range of 0.05 to 0.1mm may be used, and are not described in detail herein.
In some embodiments, the first body 210 and the second body 220 each have a thickness of 0.06 to 0.08mm. That is, the first body 210 and the second body 220 have the same thickness, and both may have any one of 0.06mm, 0.07mm, and 0.08mm, and may be selected as needed. Of course, the thicknesses of the first body 210 and the second body 220 are only examples, and any value within the range of 0.06 to 0.08mm may be used, and the description is omitted here.
In some embodiments, as shown in fig. 2, the flow guide tab 20 has a center line c parallel to the second direction, the first weld region 210a is symmetrically disposed about the center line c, and the second weld region 220a is symmetrically disposed about the center line c.
In reference to the foregoing, the first direction may refer to a left-right direction, the second direction may refer to an up-down direction, and then the "center line c" may refer to a straight line that equally divides the flow guide tab 20 in the left-right direction, the second welding regions 220a are symmetrically disposed about the center line c, that is, the welding regions on both sides of the center line c are equal in size, the left and right sides of the flow guide tab 20 are uniformly stressed, and the welding reliability and stability of the flow guide tab 20 may be ensured.
In some embodiments, in the first direction, the width of the first welding region 210a is equal to the width of the first body 210, and the width of the second welding region 220a is equal to the width of the second body 220. In this way, the widths of the first welding area 210a and the second welding area 220a can be increased as much as possible, so that the welding reliability of the first body 210 and the pole piece body 10 and the welding reliability of the second body 220 and the die-cut tab 101 are further improved.
In some embodiments, the width of the second body 220 and the width of the die-cut tab 101 are equal in the first direction, which ensures that the contact area between the second body 220 and the die-cut tab 101 is relatively large, thereby increasing the area of the second welding region 220a.
In some embodiments, the width of the second body 220 is smaller than the width of the die-cut tab 101 in the first direction.
In some embodiments, as shown in fig. 3, die-cut tab 101 has a top edge 101a remote from pole piece body 10, and second weld area 220a is located proximate to top edge 101 a. For example, the top edge 101a may refer to an upper edge of the die-cut tab 101, in such a way as to facilitate welding of the second body 220 and the die-cut tab 101.
In some embodiments, the second welding area 220a is disposed near the middle of the die-cut tab 101, which can ensure that the second welding area 220a is sufficiently welded to the die-cut tab 101, and is beneficial to reducing welding leakage.
The battery cell 1000 according to the embodiment of the present invention includes the foregoing pole piece 100.
As shown in fig. 6, the battery cell 1000 further includes a negative electrode sheet 2 and a separator 3, and the electrode sheet 100 constitutes a positive electrode sheet. The "separator 3" may be a layer of membrane material between the positive plate and the negative plate 2, which separates the positive plate from the negative plate 2 and prevents electrons in the battery cell 1000 from freely passing through the membrane material, so that ions in the electrolyte can freely pass between the positive plate and the negative plate. The battery core 1000 may be a winding core or a laminated battery core. It should be noted that other configurations and operations of the battery cell 1000 are known to those skilled in the art and will not be described in detail herein.
According to the battery cell 1000 of the embodiment of the invention, the size space ratio of the die-cutting tab 101 can be reduced through the pole piece 100, the energy density is improved, the integral welding strength formed by the flow guide tab 20 and the die-cutting tab 101 is improved, and the improvement of the quality of the battery cell 1000 is facilitated.
The battery according to the embodiment of the present invention includes the foregoing battery cell 1000.
In addition, the term "battery" as used herein may refer to a single battery or a battery module, wherein the battery module includes a plurality of single batteries. "battery" may also refer to a battery pack that includes a plurality of grouped battery packs.
The electric equipment comprises the battery.
The electric equipment may refer to a vehicle, a new energy vehicle, and the like, for example, when the electric equipment is a vehicle, the battery may supply power to electrical components in the vehicle; when the electric equipment is a new energy vehicle, the battery can be a power battery of the new energy vehicle and used for supplying power to the driving motor.
The power utilization equipment can also be equipment needing power utilization such as an unmanned aerial vehicle and a robot, for example, when the power utilization equipment is the unmanned aerial vehicle, the battery is a power battery of the unmanned aerial vehicle and supplies power for the driving motor; when the electric equipment is the robot, the battery supplies power to electric elements in the robot.
In the description herein, references to the description of the term "some embodiments," "further" or "some examples," etc., mean 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 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 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 (13)
1. A pole piece, comprising:
the pole piece comprises a pole piece body, wherein a plurality of die-cut tabs are formed on the pole piece body, the die-cut tabs are arranged at intervals along a first direction, and the die-cut tabs can be stacked;
the flow guide lug comprises a first body and a second body, the first body is arranged on the pole piece body, a first welding area welded with the pole piece body is formed on the first body, the second body is protruded out of the pole piece body, and a second welding area welded with the die-cutting lug is formed on the second body.
2. The pole piece of claim 1, wherein the flow tabs extend in a second direction, the second direction being perpendicular to the first direction, the first weld area having a length greater than a length of the second weld area in the second direction.
3. The pole piece of claim 2 wherein the length of the second weld area in the second direction is 0.5 to 10mm.
4. The pole piece of claim 2 wherein the length of the second weld area in the second direction is 1 to 3mm.
5. The pole piece of claim 4 wherein the length of the first weld area in the second direction is between 4 and 6mm.
6. The pole piece of claim 1 wherein the flow tab extends in a second direction, the second direction being perpendicular to the first direction, wherein a plurality of the die cut tabs are of equal length in the second direction, and wherein the length of the second body is greater than the length of the die cut tabs.
7. The pole piece of claim 1 wherein the flow guide tab extends in a second direction, the second direction being perpendicular to the first direction, the second body having a length greater than the first body in the second direction.
8. The pole piece of claim 1 wherein the pole piece body has a first end portion, a middle portion and a second end portion disposed along the first direction, the first body being disposed on at least one of the first end portion, the middle portion and the second end portion.
9. The pole piece of claim 8, wherein when the first body is disposed in the middle portion, the plurality of die-cut tabs are disposed on two sides of the second body and symmetrically disposed about the second body.
10. The pole piece of claim 1, wherein the first body and the second body are each 0.05-0.1 mm thick.
11. A battery cell comprising the pole piece of any one of claims 1 to 10.
12. A battery comprising a plurality of cells of claim 11.
13. An electrical device comprising the battery of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371202.8A CN115832632A (en) | 2022-11-03 | 2022-11-03 | Pole piece, electric core, battery and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371202.8A CN115832632A (en) | 2022-11-03 | 2022-11-03 | Pole piece, electric core, battery and electric equipment |
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| CN115832632A true CN115832632A (en) | 2023-03-21 |
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| CN202211371202.8A Pending CN115832632A (en) | 2022-11-03 | 2022-11-03 | Pole piece, electric core, battery and electric equipment |
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