CN217387216U - Negative current collector, negative plate and battery - Google Patents
Negative current collector, negative plate and battery Download PDFInfo
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- CN217387216U CN217387216U CN202123232886.7U CN202123232886U CN217387216U CN 217387216 U CN217387216 U CN 217387216U CN 202123232886 U CN202123232886 U CN 202123232886U CN 217387216 U CN217387216 U CN 217387216U
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Abstract
The utility model discloses a negative pole mass flow body, negative pole piece and battery, the negative pole mass flow body includes: an aluminum conductive layer; the conductive functional layer covers the surface of the aluminum conductive layer and separates the aluminum conductive layer and the electrolyte, and the conductive functional layer is used for blocking ions in the electrolyte from contacting with the aluminum conductive layer. The utility model discloses a negative pole mass flow body has the little and advantage such as with low costs of density, is favorable to improving the energy density of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery and specifically relates to a negative pole mass flow body, negative pole piece and battery are related to.
Background
In the related art battery, the current collector of the positive plate is usually an aluminum foil, and the current collector of the negative plate is a copper foil, and since the copper foil is easily oxidized at a high potential (>3V), the aluminum foil embeds lithium and other ions (such as sodium ions) at a low potential (<0.3V), the current collectors of the positive plate and the negative plate cannot be mixed. However, the price and density of the copper foil are higher than those of the aluminum foil, and the current collector of the negative plate is the copper foil, so that the manufacturing cost of the battery is increased, the quality of the battery is increased, and the energy density of the battery is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the low and big problem of quality of ability density that aims at solving the battery. Therefore, an object of the present invention is to provide a negative current collector, which has the advantages of low density and low cost, and is favorable for improving the energy density of the battery.
The utility model also provides a negative pole piece of having above-mentioned negative current collector.
The utility model also provides a battery of having above-mentioned negative pole piece.
In order to achieve the above object, the utility model provides a negative current collector, include: an aluminum conductive layer; the conductive functional layer covers the surface of the aluminum conductive layer and separates the aluminum conductive layer from the electrolyte, and the conductive functional layer is used for blocking ions in the electrolyte from contacting with the aluminum conductive layer.
The utility model discloses a negative pole mass flow body has the little and advantage such as with low costs of density, is favorable to improving the energy density of battery.
In the present invention, the conductive functional layer is a polymer coating, and the polymer coating includes at least one of polypyrrole, polyphenylene sulfide, polyaniline, and polythiophene; or the conductive functional layer is a metal plating layer, and the metal plating layer comprises at least one of metal copper and metal iron.
In the present invention, the aluminum conductive layer is partially extended from the conductive functional layer.
The utility model also provides a negative pole piece, include: the negative current collector of the utility model is provided with a dressing part and a negative pole lug which are connected along a preset direction, the preset direction is vertical to the thickness direction of the negative current collector, and one side of the aluminum conductive layer of the negative pole lug, which is far away from the dressing part, extends out of the conductive functional layer of the negative pole lug; and the negative electrode active material is coated on the outer surface of the conductive function layer of the dressing part.
In the present invention, the negative electrode sheet further includes: a carbon layer disposed between the conductive functional layer of the dressing portion and the anode active material.
Negative pole piece, through utilizing the negative current collector, have density little and advantage such as with low costs, be favorable to improving the energy density of battery.
The utility model also provides a battery, include: the electrolyte solution is arranged in the shell; the positive plate is positioned in the electrolyte; the negative plate of the utility model.
Battery, through utilizing the utility model the negative pole piece, have advantages such as with low costs and energy density height.
The utility model discloses in, the battery still includes: the piece is drawn to the negative pole, the casing is provided with first encapsulated layer and second encapsulated layer, first encapsulated layer is located the outside of second encapsulated layer, the negative pole utmost point ear stretches out the second encapsulated layer, the electrically conductive functional layer of negative pole utmost point ear with be equipped with utmost point ear glue between the second encapsulated layer, the negative pole draw the piece with stretch out of negative pole utmost point ear the part of second encapsulated layer is connected, the negative pole draw the piece stretch out first encapsulated layer and with be equipped with utmost point ear glue between the first encapsulated layer.
In the present invention, the battery further includes: the positive electrode lead-out piece is connected with a positive electrode tab of the positive electrode piece, the first packaging layer is parallel to the second packaging layer, and the positive electrode lead-out piece extends out of the first packaging layer and is provided with tab glue between the first packaging layer and the second packaging layer.
In the present invention, the battery further includes: the positive pole is drawn forth the piece, the positive pole draw forth the piece with the anodal utmost point ear of positive pole piece is connected, the second encapsulated layer is including straight section and the section of bending, straight section with first encapsulated layer is parallel, the negative pole utmost point ear with straight section is connected, the section of bending connect in straight being close to of section the edge of positive pole piece, the section orientation of bending the positive pole piece with the direction slope of first encapsulated layer extends and with first encapsulated layer is connected, the positive pole draw forth the piece stretch out first encapsulated layer and with be equipped with utmost point ear glue between the first encapsulated layer.
In the present invention, the battery further includes: the positive pole is drawn forth the piece, the positive pole draw forth the piece with the anodal utmost point ear of positive pole piece is connected, the casing includes the encapsulated layer, the positive pole is drawn forth the piece stretch out the encapsulated layer and with be equipped with utmost point ear glue between the encapsulated layer, negative pole utmost point ear stretches out the encapsulated layer, the electrically conductive functional layer of negative pole utmost point ear with be equipped with utmost point ear glue between the encapsulated layer.
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 battery according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a battery according to another embodiment of the present invention.
Fig. 3 is a schematic structural view of a battery according to still another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a negative electrode sheet according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view of a negative electrode sheet according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view of a negative current collector according to an embodiment of the present invention.
Reference numerals:
a negative current collector 1, a negative plate 2, a battery 3,
The aluminum conductive layer 100, the dressing region 110, the negative tab 120, the negative lead-out piece 140, the negative active material 150, the conductive function layer 200, the shell 300, the first packaging layer 310, the second packaging layer 320, the straight section 321, the bending section 322, the packaging layer 330, the lead-out piece, the,
The positive electrode comprises a pole core 400, a positive plate 500, a positive pole tab 510, a positive pole leading-out plate 520 and a pole tab glue 600.
Detailed Description
Reference will now be made in detail to the 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 functions 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.
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", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those 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 invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.
The negative electrode current collector 1 according to the embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 6, the negative electrode current collector 1 according to the embodiment of the present invention includes an aluminum conductive layer 100 and a conductive functional layer 200.
The conductive functional layer 200 covers the surface of the aluminum conductive layer 100 and separates the aluminum conductive layer 100 from the electrolyte, and the conductive functional layer 200 is used for blocking ions in the electrolyte from contacting the aluminum conductive layer 100.
Hereinafter, the following description will be given by taking ions in the electrolyte as lithium ions, for example, the negative electrode current collector 1 is applied in a lithium battery, and in this case, the electrolyte may be composed of a lithium salt and an organic solution. Of course, the negative current collector 1 of the embodiment of the present invention may also be applied to other electrolytes, for example, an electrolyte having a sodium salt.
According to the utility model discloses negative current collector 1, through covering electrically conductive functional layer 200 in the surface of aluminium conducting layer 100 and separating aluminium conducting layer 100 and electrolyte, electrically conductive functional layer 200 is used for the ion and the aluminium conducting layer 100 contact in the separation electrolyte. Thus, the conductive functional layer 200 can conduct electricity through electrons, the aluminum conductive layer 100 can be electrically connected with the negative active material 150 through the conductive functional layer 200, and the aluminum conductive layer 100 does not directly contact with the electrolyte, for example, the conductive functional layer 200 needs to have a characteristic of compactness and no hole, and can prevent the aluminum conductive layer 100 from embedding lithium at a low potential (<0.3V), so that on one hand, the manufacturing cost and the weight of the negative current collector 1 can be reduced, the energy density of the battery 3 of the adopted negative current collector 1 can be improved, on the other hand, the loss rate of the electrolyte can be reduced, the service life of the battery 3 can be prolonged, and the long-term effectiveness of the battery 3 can be maintained.
So, according to the utility model discloses negative current collector 1 has density little and advantage such as with low costs, is favorable to improving the energy density of battery 3.
In some embodiments of the present invention, the conductive functional layer 200 is a polymer coating, and the polymer coating includes at least one of polypyrrole, polyphenylene sulfide, polyaniline, and polythiophene.
Specifically, at least one of polypyrrole, polyphenylene sulfide, polyaniline and polythiophene can be firstly melted to form a polymer, and the melted polymer is sprayed on the outer surface of the aluminum conductive layer 100 to form a compact film, so that the processing mode of forming a high polymer coating by coating is simple, the high polymer coating has high isolation, the aluminum conductive layer 100 can be effectively isolated from the electrolyte, and the risk of lithium embedding on the surface of the aluminum conductive layer 100 can be effectively avoided. In addition, the polymer coating has good conductivity while having no ion conduction characteristic, and further can ensure the conductivity of the negative current collector 1.
In other embodiments of the present invention, the conductive functional layer 200 is a metal plating layer, and the metal plating layer includes at least one of copper and iron metal.
For example, copper, iron, or a mixture thereof may be plated on the outer surface of the aluminum conductive layer 100 by electroplating, and the plating layer of the conductive functional layer 200 may be dense by electroplating, so as to ensure that the conductive functional layer 200 effectively separates the aluminum conductive layer 100 from the electrolyte, and the metal plating layer may have good conductivity without ion conduction characteristics.
Through the two setting modes, the negative current collector 1 can be suitable for different scenes, so that the applicability of the negative current collector 1 is improved.
According to some embodiments of the present invention, as shown in fig. 6, a portion of the aluminum conductive layer 100 protrudes out of the conductive functional layer 200. Thus, the aluminum conductive layer 100 is not covered by the conductive functional layer 200, which facilitates welding of the negative current collector 1 with electrical connectors such as wires, and can reduce the difficulty of directly using the negative current collector 1 in a battery.
The following describes the negative electrode sheet 2 according to the embodiment of the present invention with reference to the drawings, as shown in fig. 4 and fig. 5, the negative electrode sheet 2 includes a negative electrode current collector 1 and a negative electrode active material 150, the negative electrode current collector 1 has a negative electrode tab 120 and a dressing area 110 along a preset direction, the preset direction is perpendicular to the thickness direction of the negative electrode current collector 1, the conductive functional layer 200 of the negative electrode tab 2 is extended from one side of the aluminum conductive layer 100 of the negative electrode tab 120, which is far away from the dressing area 110, and the negative electrode active material 150 is coated on the outer surface of the conductive functional layer 200 of the dressing area 110.
According to the utility model discloses negative pole piece 2, through utilizing the utility model discloses the negative current collector 1 of above-mentioned embodiment has energy density height and advantage such as with low costs, is favorable to improving battery 3's energy density.
Further, the negative electrode sheet 2 further includes a carbon layer (not shown) disposed between the conductive functional layer 200 of the dressing region 110 and the negative electrode active material 150.
In this way, the carbon layer functions to improve the adhesion between the negative active material 150 and the negative current collector 1, reduce the contact resistance between the negative active material 150 and the negative current collector 1, and further improve the conductivity of the negative electrode sheet 2.
The following describes a battery 3 according to an embodiment of the present invention with reference to the drawings.
As shown in fig. 1 to 3, the battery 3 includes a case 300, a positive electrode tab 500, and a negative electrode tab 2.
The electrolyte is located in the casing 300, the positive plate 500 is located in the electrolyte, the part of the negative electrode current collector 1 coated with the negative active material 150 can be located in the electrolyte, the part of the negative electrode tab 120 not covered by the conductive functional layer 200 is located outside the electrolyte, and a separator is arranged between the positive plate 500 and the negative plate 2, and the specific form of the separator is not described in the patent. Wherein, the positive plate 500, the negative plate 2 and the diaphragm jointly form the pole core 400.
According to the utility model discloses battery 3, through utilizing the utility model discloses the negative pole piece 2 of above-mentioned embodiment has energy density height and advantage such as with low costs.
In some embodiments of the present invention, as shown in fig. 1 and fig. 2, the battery 3 further includes a negative electrode tab 140, the casing 300 is provided with a first packaging layer 310 and a second packaging layer 320, and the first packaging layer 310 is located outside the second packaging layer 320.
Specifically, the part of the battery 3 containing the electrolyte is covered by the second packaging layer 320, that is, there is no electrolyte between the second packaging layer 320 and the first packaging layer 310, the negative tab 120 extends out of the second packaging layer 320, and the negative tab 140 is connected to the part of the negative tab 120 extending out of the second packaging layer 320, wherein the negative tab 140 can be welded to the aluminum conductive layer 100 of the negative tab 120, and the negative tab 140 extends out of the first packaging layer 310 and is provided with a tab glue 600 with the first packaging layer 310.
In other words, the negative electrode tab 120 located between the second encapsulating layer 320 and the electrode core 400 includes the conductive functional layer 200, so that the electrolyte can be more effectively prevented from contacting the aluminum conductive layer 100 of the negative electrode tab 120, and the lithium intercalation can be better prevented.
Thus, the conductive functional layer 200 and the second packaging layer 320 are connected through the tab glue 600 in a hot melting manner, and it can be ensured that the electrolyte does not overflow the second packaging layer 320 and contacts with the aluminum conductive layer 100 in the negative electrode tab 120, so as to avoid the situation of lithium embedding.
And, the negative electrode lead-out sheet 140 is connected with the negative electrode tab 120 and the first packaging layer 310 respectively, the negative electrode lead-out sheet 140 is connected with the first packaging layer 310 through the tab glue 600 in a hot melting manner, and the connection between the negative electrode lead-out sheet 140 and the negative electrode tab 120 is more stable, so that the packaging rupture of the joint of the negative electrode tab 120 and the shell 300 caused by the vibration of the battery 3 and the stress action of the negative electrode tab 120 can be avoided, the electric connection reliability of the negative electrode lead-out sheet 140 can be ensured, and the sealing performance of the battery 3 can be further improved.
In some embodiments of the present invention, as shown in fig. 1, the battery 3 further includes a positive electrode lead-out sheet 520, the positive electrode lead-out sheet 520 is connected to a positive electrode tab 510 of the positive electrode sheet 500, the first packaging layer 310 is parallel to the second packaging layer 320, and the positive electrode tab 510 extends out of the first packaging layer 310 and is provided with a tab glue 600 between the first packaging layer 310 and the second packaging layer 320.
Thus, the first and second sealing layers 310 and 320 are connected to the positive electrode tab 520, and the positive electrode tab 520 and the case 300 have good sealing performance and high connection strength, thereby optimizing the sealing performance of the battery 3 and ensuring the reliability of the electrical connection of the positive electrode tab 520 of the battery 3.
In other embodiments of the present invention, as shown in fig. 2, the battery 3 further includes a positive electrode lead-out sheet 520, the positive electrode lead-out sheet 520 is connected to a positive electrode tab 510 of the positive electrode sheet 500, the second packaging layer 320 includes a straight section 321 and a bending section 322, the straight section 321 is parallel to the first packaging layer 310, the negative electrode tab 120 is connected to the straight section 321, the bending section 322 is connected to the edge of the straight section 321 near the positive electrode sheet 500, the bending section 322 extends towards the direction of the positive electrode sheet 500 and the first packaging layer 310 and is connected to the first packaging layer 310, and the positive electrode lead-out sheet 520 extends out of the first packaging layer 310 and is provided with a tab glue 600 between the first packaging layer 310.
For example, the negative electrode tab 120 and the second encapsulation layer 320 are connected by the tab glue 600 through hot melting, so that the electrolyte cannot overflow the second encapsulation layer 320 and contact with the aluminum conductive layer 100 in the negative electrode tab 120, thereby avoiding the lithium intercalation. In addition, the negative lead-out piece 140 is respectively connected with the negative pole tab 120 and the first packaging layer 310, the negative lead-out piece 140 is connected with the first packaging layer 310 through the tab glue 600 in a hot melting mode, the connection between the negative lead-out piece 140 and the negative pole tab 120 is more stable, the electric connection reliability of the negative lead-out piece 140 can be guaranteed, and the sealing performance of the battery 3 is further improved.
In addition, because the bending section 322 extends obliquely towards the direction of the positive electrode tab 500 and the first packaging layer 310 and is connected with the first packaging layer 310, the positive electrode lead-out piece 520 does not pass through the second packaging layer 320, so that the tab glue 600 between the positive electrode lead-out piece 520 and the second packaging layer 320 is omitted, the installation process of the positive electrode lead-out piece 520 is simplified, the cost can be reduced, and the production efficiency is improved.
In some embodiments of the utility model, as shown in fig. 3, the battery 3 further comprises a positive lead-out piece 520, the positive lead-out piece 520 is connected with the positive pole tab 510 of the positive pole piece 500, the casing 300 comprises a packaging layer 330, the positive lead-out piece 520 stretches out the packaging layer 330 and is provided with the tab glue 600 between the packaging layer 330, the negative pole tab 120 stretches out the packaging layer 330, and the tab glue 600 is provided between the conductive functional layer 200 of the negative pole tab 120 and the packaging layer 330.
In other words, the negative electrode tab 120 is connected with the encapsulating layer 330 through the conductive functional layer 200, and since the part of the negative electrode tab 120 connected with the encapsulating layer 330 is close to the electrolyte, the part of the aluminum conductive layer 100 of the negative electrode tab 120 connected with the encapsulating layer 330 is covered by the conductive functional layer 200, so that the contact between the electrolyte and the negative electrode tab 120 can be more effectively avoided, and the lithium intercalation condition can be better avoided.
For example, the positive electrode tab 510 may be completely located in the electrolyte, a portion of the positive electrode tab 520 extends into the casing 300 and is welded to the positive electrode tab 510, and another portion of the positive electrode tab 520 extends out of the casing 300, and the positive electrode tab 520 is thermally fused with the aluminum-plastic film of the battery 3 at a high temperature, so as to achieve sealing at the positive electrode of the battery 3. The negative pole tab 120 extends out of the casing 300 to serve as a leading-out end of the negative pole of the battery 3, and the negative pole tab 120 is hot-melted with the aluminum plastic film of the battery 3 at high temperature to realize sealing at the negative pole of the battery 3.
Therefore, the negative current collector 1 can be directly used as a leading-out end of the negative electrode of the battery 3 to be connected with other electrical parts, and a negative leading-out piece 140 is not required to be additionally arranged, so that the number of parts is reduced, the production cost is reduced, and the processing steps are simplified. Moreover, the battery 3 can be sealed by the tab glue 600 and the packaging layer 330, so as to avoid the leakage of the electrolyte and the contact between the electrolyte and the negative electrode tab 120, thereby reducing the probability of lithium intercalation while ensuring the reliability of the battery 3.
Other configurations and operations of the negative electrode current collector 1, the negative electrode tab 2 and the battery 3 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "particular embodiment," "particular example," 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.
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 (10)
1. An anode current collector, comprising:
an aluminum conductive layer;
the conductive functional layer covers the surface of the aluminum conductive layer and separates the aluminum conductive layer and the electrolyte, and the conductive functional layer is used for blocking ions in the electrolyte from contacting with the aluminum conductive layer.
2. The negative electrode current collector of claim 1, wherein the conductive functional layer is a polymer coating comprising at least one of polypyrrole, polyphenylene sulfide, polyaniline, polythiophene; or
The conductive functional layer is a metal plating layer, and the metal plating layer comprises at least one of metal copper and metal iron.
3. The negative electrode current collector of claim 1, wherein a portion of the aluminum conductive layer protrudes beyond the conductive functional layer.
4. A negative electrode sheet, comprising:
the negative electrode current collector as claimed in any one of claims 1 to 3, which has a dressing portion and a negative electrode tab connected in a predetermined direction, the predetermined direction being perpendicular to the thickness direction of the negative electrode current collector, the side of the aluminum conductive layer of the negative electrode tab remote from the dressing portion protruding out of the conductive functional layer of the negative electrode tab;
and the negative electrode active material is coated on the outer surface of the conductive function layer of the dressing part.
5. The negative electrode sheet according to claim 4, further comprising:
a carbon layer disposed between the conductive functional layer of the dressing portion and the anode active material.
6. A battery, comprising:
the electrolyte solution is arranged in the shell;
the positive plate is positioned in the electrolyte;
negative electrode sheet according to any of claims 4 to 5.
7. The battery of claim 6, further comprising:
the piece is drawn to the negative pole, the casing is provided with first encapsulated layer and second encapsulated layer, first encapsulated layer is located the outside of second encapsulated layer, the negative pole utmost point ear stretches out the second encapsulated layer, the electrically conductive functional layer of negative pole utmost point ear with be equipped with utmost point ear glue between the second encapsulated layer, the negative pole draw the piece with stretch out of negative pole utmost point ear the part of second encapsulated layer is connected, the negative pole draw the piece stretch out first encapsulated layer and with be equipped with utmost point ear glue between the first encapsulated layer.
8. The battery of claim 7, further comprising:
the positive electrode lead-out piece is connected with a positive electrode tab of the positive electrode piece, the first packaging layer is parallel to the second packaging layer, and the positive electrode lead-out piece extends out of the first packaging layer and is provided with tab glue between the first packaging layer and the second packaging layer.
9. The battery of claim 7, further comprising:
the positive pole is drawn forth the piece, the positive pole draw forth the piece with the anodal utmost point ear of positive pole piece is connected, the second encapsulated layer is including straight section and the section of bending, straight section with first encapsulated layer is parallel, the negative pole utmost point ear with straight section is connected, the section of bending connect in straight being close to of section the edge of positive pole piece, the section orientation of bending the positive pole piece with the direction slope of first encapsulated layer extends and with first encapsulated layer is connected, the positive pole draw forth the piece stretch out first encapsulated layer and with be equipped with utmost point ear glue between the first encapsulated layer.
10. The battery of claim 6, further comprising:
the positive electrode lead-out piece is connected with a positive electrode tab of the positive electrode piece, the shell comprises a packaging layer, the positive electrode lead-out piece extends out of the packaging layer and is provided with tab glue between the packaging layer, a negative electrode tab extends out of the packaging layer, and a conductive functional layer of the negative electrode tab and the tab glue are arranged between the packaging layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123232886.7U CN217387216U (en) | 2021-12-20 | 2021-12-20 | Negative current collector, negative plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123232886.7U CN217387216U (en) | 2021-12-20 | 2021-12-20 | Negative current collector, negative plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217387216U true CN217387216U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123232886.7U Active CN217387216U (en) | 2021-12-20 | 2021-12-20 | Negative current collector, negative plate and battery |
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| Country | Link |
|---|---|
| CN (1) | CN217387216U (en) |
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2021
- 2021-12-20 CN CN202123232886.7U patent/CN217387216U/en active Active
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Effective date of registration: 20230105 Address after: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee after: BYD Co.,Ltd. Patentee after: Shaoxing Fudi Battery Co.,Ltd. Address before: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee before: BYD Co.,Ltd. |