CN218769678U - Battery cell, battery and coating roll - Google Patents
Battery cell, battery and coating roll Download PDFInfo
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- CN218769678U CN218769678U CN202223198323.5U CN202223198323U CN218769678U CN 218769678 U CN218769678 U CN 218769678U CN 202223198323 U CN202223198323 U CN 202223198323U CN 218769678 U CN218769678 U CN 218769678U
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Abstract
The utility model provides an electric core, a battery and a coating roller, wherein, the electric core comprises a positive plate and a negative plate, the negative plate comprises a negative current collector and a negative active substance layer, and the negative active substance layer is arranged on the surface of the negative current collector; the positive plate comprises a positive current collector and a positive active substance layer, and the positive active substance layer is arranged on the surface of the positive current collector; the negative electrode active material layer includes a first central region and a first edge region, the thickness of the first central region corresponding to the active material layer is greater than the thickness of the first edge region corresponding to the active material layer; the positive active material layer comprises a second central area and a second edge area, and the thickness of the second central area corresponding to the active material layer is smaller than that of the second edge area corresponding to the active material layer; the thickness of the first central region corresponding to the active material layer is greater than the thickness of the second central region corresponding to the active material layer. Through the structure, the condition of lithium precipitation of the negative plate can be reduced, so that the cycle life of the battery cell is prolonged.
Description
Technical Field
The utility model relates to a battery technology field especially relates to an electricity core, battery and coating roll.
Background
Lithium ion batteries are widely used in electronic products such as smart phones and notebook computers, wherein the electronic products represented by the notebook computers generally use batteries including a plurality of battery cells to provide electric energy for the notebook computers.
In the prior art, lithium cobaltate used by the anode of the lithium ion battery is usually replaced by a ternary material, so that the cost of the lithium ion battery is lower, however, in a conventional winding structure, the ternary material has higher dynamic speed due to smaller particles, and consumes more electrolyte in the circulation process of the lithium ion battery, so that the battery continuously separates lithium in the middle area of a pole piece due to the drying of the electrolyte, and the circulation life of the lithium ion battery is shortened.
Therefore, the battery core in the prior art has the problem of short cycle life.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an electricity core, battery and coating roll to solve the shorter problem of electricity core cycle life among the prior art.
In order to achieve the above object, an embodiment of the present invention provides an electrical core, which includes: the negative plate comprises a negative current collector and a negative active material layer, and the negative active material layer is arranged on the surface of the negative current collector; the positive plate comprises a positive current collector and a positive active material layer, and the positive active material layer is arranged on the surface of the positive current collector; the negative electrode active material layer includes a first central region and a first edge region, the thickness of the first central region corresponding to the active material layer is greater than the thickness of the first edge region corresponding to the active material layer; the positive electrode active material layer comprises a second central area and a second edge area, and the thickness of the second central area corresponding to the active material layer is smaller than that of the second edge area corresponding to the active material layer; the thickness of the first central region corresponding to the active material layer is larger than that of the second central region corresponding to the active material layer.
Optionally, at least one side of the negative electrode active material layer is in a convex circular arc shape, the first central region is positioned at the vertex of the circular arc, and the first edge region is positioned at two sides of the circular arc;
at least one side of the positive electrode active material layer is in a concave arc shape, the second central area is located at a concave point of the arc, and the second edge area is located at vertexes of two sides of the arc.
Optionally, the thickness of the first edge region is equal to the thickness of the second edge region.
Optionally, a height difference between the first central region and the first edge region is equal to a height difference between the second central region and the second edge region.
Optionally, the arc structure corresponding to the negative electrode active material layer matches the arc structure corresponding to the positive electrode active material layer.
Optionally, a charge balance value corresponding to the first central region and the second central region is greater than a charge balance value corresponding to the first edge region and the second edge region;
wherein the capacity balance value represents a ratio of a negative electrode capacity per unit area to a positive electrode capacity per unit area.
Optionally, two sides of the negative electrode active material layer are convex circular arcs, the first central region is positioned at the vertex of the circular arc, and the first edge region is positioned at two sides of the circular arc;
the two sides of the positive electrode active material layer are in a concave arc shape, the second central area is located at a concave point of the arc, and the second edge area is located at the top points of the two sides of the arc.
The embodiment of the utility model provides a still include a battery, the battery includes electric core.
The embodiment of the utility model provides a still include a coating roll, coating roll is used for making positive plate and negative pole piece, wherein, coating roll includes the regulation layer, the regulation layer is used for adjusting the height of first central zone to first marginal area; or
The adjusting layer is used for adjusting the height of the second central area to the second edge area.
Optionally, the adjusting layer comprises a first adjusting layer and a second adjusting layer;
the first adjusting layer is provided with a first coating slot group, and the first coating slot group is used for coating negative plates or positive plates in corresponding quantity;
the second adjusting layer is provided with a second coating slot group, and the second coating slot group is used for coating negative plates or positive plates in corresponding quantity;
the first coating groove group and the second coating groove group are arranged correspondingly.
The embodiment of the utility model provides an in, the negative pole piece is including the negative pole mass flow body and set up in the negative pole active material layer of negative pole mass flow body both sides, the positive pole piece includes the positive pole mass flow body and sets up in the positive pole active material layer of positive pole mass flow body both sides, wherein, the thickness that first central region corresponds active material layer is greater than the thickness that first edge region corresponds active material layer, the thickness that second central region corresponds active material layer is less than the thickness that second edge region corresponds active material layer, and the thickness that first central region corresponds active material layer is greater than the thickness that second central region corresponds active material layer, thereby make the quantity of the lithium ion of focusing or accepting reduce on the negative pole piece in the unit interval, electrolyte content increases, thereby can reduce the negative pole piece middle zone because electrolyte consumes the condition of the excessive fast or electrolyte is not enough to appear and educe the lithium, and then the life cycle of electric core has been improved.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1a is a schematic structural diagram of a negative electrode plate in a battery cell according to an embodiment of the present invention;
fig. 1b is one of schematic structural diagrams of a positive plate in a battery cell according to an embodiment of the present invention;
fig. 2a is a second schematic structural diagram of a negative electrode plate in a battery cell according to an embodiment of the present invention;
fig. 2b is a second schematic structural diagram of a positive plate in a battery cell according to an embodiment of the present invention;
FIG. 3a is a schematic structural diagram of a coating roller according to an embodiment of the present invention;
fig. 3b is a second schematic structural diagram of a coating roll according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the embodiments of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the utility model provides an electric core, as in fig. 1a to fig. 2b, the electric core includes positive plate and negative plate, the negative plate includes negative current collector and negative active material layer 10, negative active material layer 10 sets up in the surface of the negative current collector;
the positive plate comprises a positive current collector and a positive active material layer 20, wherein the positive active material layer 20 is arranged on the surface of the positive current collector;
the anode active material layer 10 includes a first central region 11 and a first edge region 12, the thickness of the first central region 11 corresponding to the active material layer is larger than the thickness of the first edge region 12 corresponding to the active material layer;
the positive electrode active material layer 20 includes a second central region 21 and a second edge region 22, the thickness of the second central region 21 corresponding to the active material layer being smaller than the thickness of the second edge region 22 corresponding to the active material layer;
the thickness of the first central region 11 corresponding to the active material layer is greater than the thickness of the second central region 21 corresponding to the active material layer.
It should be understood that the first central region 11 and the first edge region 12 are based on the negative electrode sheet, please refer to fig. 2a, and from the perspective of fig. 2a, the thickness of the negative electrode active material layer 10 decreases from the symmetry axis in the vertical direction to two sides in sequence, then the first central region 11 is a region close to the symmetry axis, and the first edge region 12 is a region at two side edges of the negative electrode active material layer 10, wherein the included ranges of the first central region 11 and the first edge region 12 can be set according to actual requirements.
Similarly, the second central region 21 and the second edge region 22 are based on the positive electrode sheet, please refer to fig. 2b, and from the perspective of fig. 2b, the thickness of the positive electrode active material layer 20 increases from the symmetry axis in the vertical direction to both sides, so that the second central region 21 is a region close to the symmetry axis, and the second edge region 22 is a region at both side edges of the positive electrode active material layer 20, wherein the included ranges of the second central region 21 and the second edge region 22 can be set according to actual requirements.
In addition, the types of the battery cell are not limited in the embodiment of the present invention, for example: the battery cell can be a winding battery cell and also can be a laminated battery cell.
In this embodiment, the negative electrode sheet includes the negative electrode collector and the negative electrode active material layers 10 disposed on two sides of the negative electrode collector, and the positive electrode sheet includes the positive electrode collector and the positive electrode active material layers 20 disposed on two sides of the positive electrode collector, wherein the thickness of the first central region 11 corresponding to the active material layer is greater than that of the first edge region 12 corresponding to the active material layer, the thickness of the second central region 21 corresponding to the active material layer is less than that of the second edge region 22 corresponding to the active material layer, and the thickness of the first central region 11 corresponding to the active material layer is greater than that of the second central region 21 corresponding to the active material layer, so that the number of lithium ions focused or received on the negative electrode sheet in a unit time is reduced, thereby reducing the occurrence of lithium deposition on the negative electrode sheet, and further improving the cycle life of the battery cell.
In the process of charging a battery, lithium ions are extracted from a positive electrode and then are inserted into a negative electrode through an electrolyte, and generally, whether a lithium precipitation phenomenon exists in a Cell can be judged by using a Balance of electricity (CB) value, wherein the CB value represents a ratio of a negative electrode capacity per unit area to a positive electrode capacity, when the CB value is greater than 1, the negative electrode capacity per unit area is greater than the positive electrode capacity, lithium ions are not precipitated theoretically, and when the CB value is less than 1, the negative electrode capacity per unit area is less than the positive electrode capacity, and lithium ions are precipitated from the negative electrode.
In addition, the negative electrode active material layer 10 may be complementary to the positive electrode active material layer 20 in shape, that is, the protruding part of the negative electrode active material layer 10 is complementary to the recessed part of the positive electrode active material layer 20, so that the thickness increase of the negative electrode sheet and the thickness decrease of the positive electrode sheet do not affect the overall thickness of the battery cell, thereby maintaining the overall structure of the battery.
It should be understood that the negative electrode active material layer 10 and the positive electrode active material layer 20 may be provided in irregular but complementary shapes, and of course, the negative electrode active material layer 10 and the positive electrode active material layer 20 may be formed in circular arc shapes during coating in order to facilitate the formation of the negative electrode sheet and the positive electrode sheet, and the embodiment of the present invention is not limited to the shape in which the negative electrode active material layer 10 is convex and the shape in which the positive electrode active material layer 20 is concave.
The thickness setting for the first central region 11, the first edge region 12, the second central region 21 and the second edge region 22 may be determined according to the actual working condition of the battery and the CB value set by the battery, which is not limited by the embodiment of the present invention.
In addition, the shape of the active material layer on the negative electrode sheet side may be simply changed, or the shape of the active material layer on the positive electrode sheet side may be changed, and the shape change of one side or both sides of the negative electrode sheet and the positive electrode sheet may be determined according to the cell structure and the actual demand.
Alternatively, at least one side of the anode active material layer 10 is in the shape of a convex circular arc, the first center region 11 is located at the apex of the circular arc, and the first edge regions 12 are located on both sides of the circular arc;
at least one side of the positive electrode active material layer 20 is in the shape of a concave arc, the second center region 21 is located at the concave point of the arc, and the second edge regions 22 are located at the vertices of the arc.
In this embodiment, the negative electrode active material layer 10 in the negative electrode sheet is in the shape of a convex circular arc and is disposed on at least one side of the negative electrode current collector, wherein the first central region 11 is located at the vertex of the circular arc, the first edge region 12 is located on both sides of the circular arc, that is, the thickness of the negative electrode active material layer 10 in the middle region is greater than that of the negative electrode active material layer 10 in the edge region, and similarly, the positive electrode active material layer 20 in the positive electrode sheet is in the shape of a concave circular arc and is disposed on at least one side of the positive electrode current collector, wherein the second central region 21 is located at the concave point of the circular arc, and the second edge region 22 is located at the vertex of the circular arc, that is, the thickness of the positive electrode active material layer 20 in the middle region is less than that of the positive electrode active material layer 20 in the edge region, and the edges of the negative electrode sheet and the positive electrode sheet are designed to have a limit of no lithium deposition, that corresponds to a CB value slightly greater than that of the CB value in the edge region, and the negative electrode sheet is focused or received lithium ions in the negative electrode sheet per unit time is reduced, thereby reducing the occurrence of the cycle life of the lithium deposition.
It should be noted that the arc shape of the protrusion on the negative electrode active material layer 10 and the arc shape of the depression on the positive electrode active material layer 20 may be matched in shape, or may be arc shapes with different radians, which is not limited in the embodiment of the present invention.
Optionally, the thickness of the first edge region 12 is equal to the thickness of the second edge region 22.
Under the condition that the thickness of the first edge region 12 is equal to that of the second edge region 22, the part with the minimum thickness in the negative electrode active material layer 10 is the same as the corresponding thickness of the part with the maximum thickness in the positive electrode active material layer 20, so that the CB value corresponding to each position between the corresponding negative electrode sheet and the positive electrode sheet is greater than 1 theoretically, the condition that the lithium precipitation occurs in the negative electrode sheet can be reduced, and the cycle life of the battery cell is prolonged.
Optionally, the difference in height between the first central area 11 and the first edge area 12 is equal to the difference in height between the second central area 21 and the second edge area 22.
In this embodiment, the height difference between the first central region 11 and the first edge region 12 may be set to a first height difference, and the height difference between the second central region 21 and the second edge region 22 may be set to a second height difference, wherein the first height difference is equal to the second height difference, so that when the anode active material layer 10 and the cathode active material layer 20 are substantially matched, the CB value of the first central region 11 corresponding to the second central region 21 is greater than the CB value of the first edge region 12 corresponding to the second edge region 22, which reduces the coating requirement, reduces the occurrence of lithium deposition in the negative electrode sheet, and improves the cycle life of the battery cell.
Alternatively, the circular arc structure corresponding to the anode active material layer 10 matches the circular arc structure corresponding to the cathode active material layer 20.
In this embodiment, the arc structure corresponding to the negative electrode active material layer 10 matches the arc structure corresponding to the positive electrode active material layer 20, and by providing this structure, the variation in cell size due to the mismatch in the shapes of the opposing faces of the negative electrode sheet and the positive electrode sheet is reduced. Through the setting of this structure, can effectively guarantee not losing energy density under the condition of improving the lithium of analysing, in addition, this structure can also guarantee that the battery middle zone preserves more electrolyte at the in-process of preparation thereby satisfies the required electrolyte of later stage battery circulation and avoids the later stage to analyse the lithium because of electrolyte is not enough.
Optionally, the charge balance value corresponding to the first central area 11 and the second central area 21 is greater than the charge balance value corresponding to the first edge area 12 and the second edge area 22;
wherein the charge balance value represents a ratio of a negative electrode capacity per unit area to a positive electrode capacity per unit area.
In this embodiment, since the coulomb balance value represents a ratio of a negative electrode capacity per unit area to a positive electrode capacity per unit area, when the coulomb balance value is greater than 1, a lithium deposition phenomenon does not theoretically occur, and in the battery cell, since a thickness difference between the active material layers corresponding to the first central region 11 and the second central region 21 is greater than a thickness difference between the active material layers corresponding to the first edge region 12 and the second edge region 22, the coulomb balance value corresponding to the first central region 11 and the second central region 21 is greater than a coulomb balance value corresponding to the first edge region 12 and the second edge region 22, the overall coulomb balance value and the amount of the active material are not significantly increased compared to a case where the active material layers are symmetrically disposed on both sides without protrusions, and the middle lithium deposition is improved, thereby extending the cycle life of the battery cell.
Alternatively, both sides of the anode active material layer 10 are convex circular arcs, the first center region 11 is located at the vertex of the circular arc, and the first edge regions 12 are located at both sides of the circular arc;
both sides of the positive electrode active material layer 20 are concave circular arcs, the second center region 21 is located at a concave point of the circular arc, and the second edge regions 22 are located at vertexes of both sides of the circular arc.
In this embodiment, both sides of the negative electrode active material layer 10 may be both convex circular arcs, and may be understood as being formed by splicing two single-sided circular arc negative electrode active materials, and likewise, both sides of the positive electrode active material layer 20 may be both concave circular arcs, and may be understood as being formed by splicing two single-sided concave positive electrode active materials, and when the requirement of reducing lithium deposition on the negative electrode sheet is met, the negative electrode active material layer 10 and the positive electrode active material layer 20 are respectively provided with an integrated structure, thereby reducing the process flow.
An embodiment of the utility model provides a still provide a battery, include electric core.
It should be noted that the battery may be applied to various electric devices, and the electric devices may be a notebook computer, a smart phone, a new energy automobile, and the like. The implementation manner of the embodiment of the battery is also suitable for the embodiment of the electronic device, and can achieve the same technical effect, which is not described herein again.
The embodiment of the utility model provides a coating roll is still provided, like figure 3a to figure 3b, coating roll is used for making above-mentioned negative pole piece and above-mentioned positive plate, wherein
The coating roller comprises an adjusting layer 30, and the adjusting layer 30 is used for adjusting the height from the first central area 11 to the first edge area 12; or
The adjustment layer 30 is used to adjust the height of the second central area 21 to the second edge area 22.
The adjusting layer 30 may be coated on the thickness of the active material layer according to the use requirement and the battery requirement, and the specific height is not limited in the embodiment of the present invention.
The coating roll shown in fig. 3a is used for coating the negative electrode sheet, and the coating roll shown in fig. 3b is used for coating the positive electrode sheet.
Optionally, the adjustment layer 30 includes a first adjustment layer 31 and a second adjustment layer 32;
the first adjusting layer 31 is provided with a first coating slot group 311, and the first coating slot group 311 is used for coating a corresponding number of negative pole pieces or positive pole pieces;
the second adjusting layer 32 is provided with a second coating slot group 321, and the second coating slot group 321 is used for coating a corresponding number of negative electrode plates or positive electrode plates;
the first coating groove set 311 and the second coating groove set 321 are provided correspondingly.
In this embodiment, the first coating slot set 311 and the second coating slot set 321 are disposed correspondingly, wherein the first coating slot set 311 and the second coating slot set 321 may be symmetrically disposed in a horizontal plane, and each sub-slot in the first coating slot set 311 may be in matching correspondence with each sub-slot in the second coating slot set 321, and one sub-slot in the first coating slot set 311 and one matching sub-slot in the second coating slot set 321 may complete a coating process flow of a positive plate or a negative plate.
The number of the sub-grooves in the first coating groove group 311 and the second coating groove group 321 can be determined according to the use requirement, and the embodiment of the present invention is not limited thereto.
The films of the first coating groove group 311 and the second coating groove group 321 may be replaced according to the thickness requirement of the active material layer.
It should be noted that the positive electrode sheet or the negative electrode sheet can be coated on both sides by the adjusting layer 30, wherein the first coating slot set 311 and the second coating slot set 321 can be respectively disposed on the upper and lower coating rollers, and the upper and lower coating rollers can be driven by the metering roller, and the coating transported to the metering roller can be transferred to the coating roller due to the rotation of the roller, and finally the coating on the positive electrode sheet or the negative electrode sheet is completed.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus of the embodiments of the present invention is not limited to performing functions in the order discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (10)
1. The battery cell is characterized by comprising a positive plate and a negative plate, wherein the negative plate comprises a negative current collector and a negative active material layer, and the negative active material layer is arranged on the surface of the negative current collector;
the positive plate comprises a positive current collector and a positive active material layer, and the positive active material layer is arranged on the surface of the positive current collector;
the negative electrode active material layer includes a first central region and a first edge region, the thickness of the first central region corresponding to the active material layer is greater than the thickness of the first edge region corresponding to the active material layer;
the positive electrode active material layer comprises a second central area and a second edge area, and the thickness of the second central area corresponding to the active material layer is smaller than that of the second edge area corresponding to the active material layer;
the thickness of the first central area corresponding to the active material layer is larger than that of the second central area corresponding to the active material layer.
2. The cell of claim 1, wherein at least one side of the negative electrode active material layer is a convex arc, the first central region is located at a vertex of the arc, and the first edge region is located on both sides of the arc;
at least one side of the positive electrode active material layer is in a concave arc shape, the second central area is located at a concave point of the arc, and the second edge area is located at vertexes of two sides of the arc.
3. The cell of claim 2, wherein the thickness of the first edge region is equal to the thickness of the second edge region.
4. The cell of claim 3, wherein a difference in height between the first central region and the first edge region is equal to a difference in height between the second central region and the second edge region.
5. The battery cell of claim 4, wherein the arc structure corresponding to the negative electrode active material layer matches the arc structure corresponding to the positive electrode active material layer.
6. The cell of claim 1, wherein the charge balance value corresponding to the first central region and the second central region is greater than the charge balance value corresponding to the first edge region and the second edge region;
wherein the capacity balance value represents a ratio of a negative electrode capacity per unit area to a positive electrode capacity per unit area.
7. The battery cell of claim 2, wherein two sides of the negative electrode active material layer are convex circular arcs, the first central region is located at the vertex of the circular arc, and the first edge regions are located at two sides of the circular arc;
the two sides of the positive electrode active material layer are in a concave arc shape, the second central area is located at a concave point of the arc, and the second edge area is located at vertexes of the two sides of the arc.
8. A battery comprising the cell of any one of claims 1 to 7.
9. A coating roll for producing the negative-electrode sheet and the positive-electrode sheet according to any one of claims 1 to 7;
wherein the coating roller comprises an adjustment layer for adjusting the height of the first central area to the first edge area; or
The adjusting layer is used for adjusting the height of the second central area to the second edge area.
10. The coating roller according to claim 9, wherein the adjustment layer comprises a first adjustment layer and a second adjustment layer;
the first adjusting layer is provided with a first coating slot group, and the first coating slot group is used for coating negative plates or positive plates in corresponding quantity;
the second adjusting layer is provided with a second coating groove group, and the second coating groove group is used for coating negative plates or positive plates in corresponding quantity;
the first coating groove group and the second coating groove group are arranged correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223198323.5U CN218769678U (en) | 2022-11-29 | 2022-11-29 | Battery cell, battery and coating roll |
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| CN202223198323.5U CN218769678U (en) | 2022-11-29 | 2022-11-29 | Battery cell, battery and coating roll |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116230858A (en) * | 2023-05-08 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
| CN116230856A (en) * | 2023-05-08 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
| CN116247162A (en) * | 2023-05-09 | 2023-06-09 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
-
2022
- 2022-11-29 CN CN202223198323.5U patent/CN218769678U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116230858A (en) * | 2023-05-08 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
| CN116230856A (en) * | 2023-05-08 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
| CN116247162A (en) * | 2023-05-09 | 2023-06-09 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
| CN116247162B (en) * | 2023-05-09 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | Positive pole piece, battery and electric equipment |
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