CN114512635A - Lithium ion battery and electric automobile - Google Patents
Lithium ion battery and electric automobile Download PDFInfo
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- CN114512635A CN114512635A CN202210036719.5A CN202210036719A CN114512635A CN 114512635 A CN114512635 A CN 114512635A CN 202210036719 A CN202210036719 A CN 202210036719A CN 114512635 A CN114512635 A CN 114512635A
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- pole piece
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 98
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 98
- 239000010439 graphite Substances 0.000 claims abstract description 98
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 239000003792 electrolyte Substances 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052744 lithium Inorganic materials 0.000 abstract description 16
- 238000001556 precipitation Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 13
- 238000000576 coating method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 210000001787 dendrite Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 102000004310 Ion Channels Human genes 0.000 description 3
- 206010037549 Purpura Diseases 0.000 description 3
- 241001672981 Purpura Species 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery and an electric automobile, wherein the lithium ion battery comprises an isolating membrane, an anode pole piece, a cathode pole piece and electrolyte for soaking the anode pole piece and the cathode pole piece, and the isolating membrane is arranged between the anode pole piece and the cathode pole piece; the surface of the anode piece comprises an edge area and a middle area, wherein the edge area of the surface of the anode piece is coated with first graphite, the middle area of the surface of the anode piece is coated with second graphite, the middle area refers to an area, except the edge area, in the surface of the anode piece, and the charging rate of the first graphite is greater than that of the second graphite. The charging multiplying power difference between the edge area and the middle area of the surface of the anode pole piece can be reduced, so that the probability of lithium precipitation in the edge area can be reduced, the charging multiplying power of the edge of the anode pole piece is greatly improved, and the edge of the pole piece can bear larger current; on the premise of not changing a battery system, a structure and cost, the cycle life of the battery cell is prolonged, and the driving mileage of the whole vehicle is increased.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a lithium ion battery and an electric automobile.
Background
With the growing demand of people on pure electric vehicles and hybrid electric vehicles, the demand on high-power and high-energy-density lithium ion batteries is higher and higher. Graphite is the most common anode material (i.e., negative electrode material) of lithium ion batteries, and has the advantages of high energy density, low voltage, good conductivity, abundant resources, low price, and the like.
However, the graphite material has the disadvantages of low charge capacity and easy lithium precipitation on the surface, which leads to low effective capacity of the lithium ion battery and serious safety problems.
Disclosure of Invention
The embodiment of the application provides the lithium ion battery and the electric automobile, solves the technical problem that lithium is easily separated from the graphite surface on the anode of the lithium ion battery in the prior art, and achieves the technical effect of reducing the lithium separation degree of the graphite surface on the anode of the lithium ion battery.
In a first aspect, the present application provides a lithium ion battery, which includes an isolation film, an anode plate, a cathode plate, and an electrolyte for soaking the anode plate and the cathode plate, wherein the isolation film is disposed between the anode plate and the cathode plate;
the surface of the anode piece comprises an edge area and a middle area, wherein the edge area of the surface of the anode piece is coated with first graphite, the middle area of the surface of the anode piece is coated with second graphite, the middle area refers to an area, except the edge area, in the surface of the anode piece, and the charging rate of the first graphite is greater than that of the second graphite.
Further, the anode plate, the separator and the cathode plate are in a stacked state.
Further, the anode sheet, the separator and the cathode sheet are in a wound state.
Further, a first edge subregion and a second edge subregion in the anode pole piece are coated with the first graphite, wherein the first edge subregion refers to a region on one side of a tab far away from the anode pole piece in the edge region, and the second edge subregion refers to a region on one side of the tab near the anode pole piece in the edge region.
Further, in the first direction of the anode pole piece, the width of the first graphite coated on the edge area is 1% -50% of the width of the anode pole piece in the first direction.
Further, when two edge sub-regions are distributed in the first direction of the anode piece, the widths of the first graphite of the two edge sub-regions distributed in the first direction of the anode piece are the same.
Further, in the second direction of the anode pole piece, the width of the first graphite coated on the edge area is 1% -50% of the width of the anode pole piece in the second direction; the first direction and the second direction are perpendicular to each other.
Further, when two edge sub-regions are distributed in the second direction of the anode plate, the widths of the first graphite of the two edge sub-regions distributed in the second direction of the anode plate are the same.
Further, the first graphite coated on the edge region of the surface of the anode sheet comprises at least one of etched graphite, foamed graphite, functionalized graphite, micro-expanded graphite, coated graphite and doped graphite.
In a second aspect, the present application provides an electric vehicle comprising a lithium ion battery as provided in the first aspect.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the application provides a lithium ion battery that the multiplying power is better at the surperficial edge coating of anode plate, and the regional second graphite that coats of middle part can reduce the multiplying power difference that charges between the marginal zone on the anode plate surface of battery and the middle part region, and then can reduce the marginal zone probability that the phenomenon of analyzing lithium appears, improves the multiplying power that charges at anode plate edge greatly, makes the pole piece edge can bear bigger electric current. The scheme provided by the embodiment can greatly prolong the cycle life of the battery cell and increase the endurance mileage of the whole vehicle on the premise of not changing a battery system, a structure and cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of the edge and middle regions of the surface of an anode sheet provided herein;
FIG. 2 is a schematic diagram of a cell structure in the form of a laminate;
FIG. 3 is a schematic diagram of a battery in rolled form;
fig. 4 is a schematic view of the edge region and the middle region of a battery in a wound form.
Reference numerals:
1-cathode pole piece, 2-cathode coating material, 3-isolating membrane, 4-anode pole piece, 5-anode coating material (graphite), 6-anode tab and 7-cathode tab.
Detailed Description
The embodiment of the application provides a lithium ion battery, and solves the technical problem that lithium is easy to separate from the graphite surface on the anode of the lithium ion battery in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a lithium ion battery comprises an isolating membrane, an anode pole piece, a cathode pole piece and electrolyte for soaking the anode pole piece and the cathode pole piece, wherein the isolating membrane is arranged between the anode pole piece and the cathode pole piece; the surface of the anode piece comprises an edge area and a middle area, wherein the edge area of the surface of the anode piece is coated with first graphite, the middle area of the surface of the anode piece is coated with second graphite, the middle area refers to an area, except the edge area, in the surface of the anode piece, and the charging rate of the first graphite is greater than that of the second graphite.
The better first graphite of multiplying power that charges is coated through the surface edge at anode plate to this embodiment, and middle part region coating second graphite can reduce the multiplying power difference that charges between the marginal zone on anode plate surface and the middle part region, and then can reduce the marginal zone probability that the lithium phenomenon appears analyzing, improves the multiplying power that charges at anode plate edge greatly, makes the pole piece edge can bear bigger electric current. The scheme provided by the embodiment can greatly prolong the cycle life of the battery cell and increase the endurance mileage of the whole vehicle on the premise of not changing a battery system, a structure and cost.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The more the cycle number of the battery cell in the battery is, the longer the endurance mileage of the electric automobile is, because the edge effect of the pole piece in the battery cell (that is, the actual current at the edge of the pole piece is greater than the current at the middle part of the pole piece) and the graphite coated on the surface of the pole piece are not uniform (that is, the graphite at the edge of the pole piece is less than the graphite at the middle part of the pole piece), along with the increase of the cycle number, the problems of purpura (the phenomenon of slightly analyzing lithium), lithium analysis and the like can occur at the edge of the pole piece of the battery cell, and finally, the lithium dendrite can puncture the isolation film to cause the safety risk of the battery. Therefore, how to reduce the occurrence probability of purpura and lithium deposition is a problem which needs to be solved urgently at present.
In order to solve the above technical problems, the present embodiment provides a lithium ion battery, where the lithium ion battery includes an isolation film, an anode plate, a cathode plate, and an electrolyte solution for soaking the anode plate and the cathode plate, and the isolation film is disposed between the anode plate and the cathode plate; the surface of the anode piece comprises an edge area and a middle area, wherein the edge area of the surface of the anode piece is coated with first graphite, the middle area of the surface of the anode piece is coated with second graphite, the middle area refers to an area, except the edge area, in the surface of the anode piece, and the charging rate of the first graphite is greater than that of the second graphite. The first graphite and the second graphite are relatively, and the graphite having the larger charge rate is referred to as the first graphite, and the graphite having the smaller charge rate is referred to as the second graphite.
Under the condition that the surface of the anode pole piece is coated with the same graphite, due to the edge effect of the pole piece in the battery cell (namely the actual current at the edge of the pole piece is greater than the current at the middle part of the pole piece) and the fact that the graphite at the edge of the pole piece is less than the graphite at the middle part of the pole piece (the graphite at the edge of the pole piece caused by the coating process is less than the graphite at the middle part of the pole piece), the number of channels of lithium ions provided by the edge part of the anode pole piece is less than that of the channels of the lithium ions provided by the middle part, the lithium ions in the electrolyte are uniformly distributed, and because the number of the lithium ion channels at the edge part is less, the lithium ions are blocked, purple spots are gradually formed, and the lithium ions are continuously accumulated, and then lithium dendrites are formed.
The embodiment coats different graphites on the surface of the anode plate, namely coats the first graphite in the edge area, coats the second graphite in the middle area, and further reduces the difference between the number of the lithium ion channels in the edge area and the number of the lithium ion channels in the middle area, thereby reducing the probability of occurrence of purpura and lithium dendrite on the surface of the anode plate, and further reducing the probability that the lithium dendrite can pierce the isolating membrane, so as to improve the overall charging rate of the battery.
The following description will be made by taking the anode plate as a rectangle as an example.
Specifically, the surface of the anode tab can be divided into 5 regions, as shown in fig. 1, including region A, B, C, D, E (where the region within the dashed line is the E region, and region A, B, C, D is partially overlapped and therefore not divided in detail). It should be noted that the anode plate has two surfaces, the edge regions of the two surfaces are coated with the first graphite, the middle region is coated with the second graphite, and only one of the surfaces is illustrated in fig. 1 and the following description.
In the present embodiment, the edge region of the surface of the anode sheet refers to a region at the edge of the anode sheet, and the central region refers to a region other than the edge region. For example, the regions A, B, C, D are all located at the edge of the anode sheet surface, so the regions A, B, C, D can be both edge regions, and further the edge region of the anode sheet surface in this embodiment can include at least one of the regions A, B, C, D.
The region A, B, C, D relates to partially overlapping regions (denoted as regions 1, 2, 3, and 4 as shown in fig. 1), where region 1 may be part of region a or region B; region 2 may be part of region B or region C; region 3 may be part of region C or region D; the region 4 may be a part of the region a or a part of the region D. The rule of the overlapping area may be determined according to practical situations, and is not limited herein.
The relationship between the edge region and the central region is relative, and when the edge region of the present embodiment includes only region a, then region B, C, D, E is the central region; when the edge region of the present embodiment includes only region B, then region A, C, D, E is the middle region; when the edge region of the present embodiment includes only regions a and B, then region C, D, E is the middle region; when the edge region of the present embodiment includes only regions a and C, then region B, D, E is the middle region. And the rest of the cases are analogized in turn, and the description is omitted here.
The lithium ion battery provided by the embodiment can be a battery in a laminated form, and can also be a battery in a winding form. The battery in the form of a laminate is shown in fig. 2 and the battery in the form of a roll is shown in fig. 3.
When the lithium ion battery is a battery in a laminated form, the anode sheet, the separator, and the cathode sheet are in a stacked state. As shown in fig. 2, the anode sheet 4, the separator 3, and the cathode sheet 1 are laminated in this order. Since the anode sheet 4, the separator 3 and the cathode sheet 1 are in a stacked state, both the edge region (e.g., region A, B, C, D in fig. 1) and the middle region (e.g., region E in fig. 1) of the surface of the anode sheet 4 can contact the electrolyte and can provide a passage for lithium ions in the electrolyte. It is regions A, B, C, D that all provide a pathway for lithium ions, and thus regions A, B, C, D can be coated with the first graphite and regions E coated with the second graphite, as shown in fig. 1.
When the lithium ion battery is a wound battery, the anode plate 4, the separator 3 and the cathode plate 1 are stacked first and then wound. As shown in fig. 3, the anode sheet 4, the separator 3, and the cathode sheet 1 are stacked in this order and wound. Due to the particularity of the winding cell, the edge area and the middle area of the surface of the anode pole piece 4 in the winding cell are different from the area division of the laminated cell. As shown in fig. 4, when the anode sheet 4 is wound in the direction of the arrow, the lithium ion flux is generally small in the left and right edge regions of the anode sheet 4, and is large in the upper and lower edge regions A, C and the middle region E of the anode sheet 4. For the anode sheet 4 of a cell in wound form, it is therefore generally possible to apply the first graphite only in the edge region A, C and the second graphite only in the central region E.
In general, a tab is disposed on the upper edge or the lower edge of the anode plate, so that a region of the edge region far from the tab of the anode plate may be referred to as a first edge sub-region, and a region of the edge region near to the tab of the anode plate is referred to as a second edge sub-region. For example, in fig. 4, the tab is disposed at the edge of the area a, then the area a is referred to as a second edge sub-area, and the area C is referred to as a first edge sub-area.
In addition, in the first direction of the anode pole piece, the width of the first graphite coated on the edge area is 1% -50% of the width of the anode pole piece in the first direction. The first direction may be a short axis direction (i.e., an up-down direction) of the anode tab 4 as shown in fig. 1. For example, when the width of the anode tab 4 in the short axis direction is 10cm, the width of the first graphite (i.e., the sum of the widths of the region a and the region C) may be 0.1cm to 5 cm.
When two edge sub-regions are distributed in the first direction of the anode pole piece, the widths of the first graphite of the two edge sub-regions distributed in the first direction of the anode pole piece are the same. That is, when the edge area of the anode tab 4 includes the area a and the area C shown in fig. 1, the widths of the areas a and C are the same.
In the second direction of the anode pole piece, the width of the first graphite coated on the edge area is 1% -50% of the width of the anode pole piece in the second direction; the first direction and the second direction are perpendicular to each other. The second direction may be a long axis direction (i.e., left-right direction) of the anode sheet 4 as shown in fig. 1. For example, when the width of the anode tab 4 in the short axis direction is 30cm, the width of the first graphite (i.e., the sum of the widths of the region a and the region C) may be 0.3cm to 15 cm.
When two edge sub-regions are distributed in the second direction of the anode pole piece, the widths of the first graphite of the two edge sub-regions distributed in the second direction of the anode pole piece are the same. That is, when the edge region of the anode tab includes the region B and the region D shown in fig. 1, the widths of the regions B and D are the same.
Wherein the first graphite and the second graphite are relative, and the charge rate of the first graphite is higher than that of the second graphite. The first graphite coated on the edge region of the surface of the anode piece can be quick-charging graphite, and the quick-charging graphite comprises at least one of etched graphite, foamed graphite, functionalized graphite, micro-expanded graphite, coated graphite and doped graphite.
As shown in fig. 1, when the edge region of the surface of the anode tab includes at least two regions, the kind of the first graphite used in each region may be the same or different.
In summary, in the embodiment, the first graphite with a better charging rate is coated on the edge of the surface of the anode plate, and the second graphite is coated on the middle area, so that the charging rate difference between the edge area and the middle area of the surface of the anode plate can be reduced, the probability of lithium precipitation in the edge area can be further reduced, the charging rate of the edge of the anode plate can be greatly improved, and the edge of the anode plate can bear a larger current. The scheme provided by the embodiment can greatly prolong the cycle life of the battery cell and increase the endurance mileage of the whole vehicle on the premise of not changing a battery system, a structure and cost.
Based on the same inventive concept, the embodiment provides an electric vehicle, and the electric vehicle comprises the lithium ion battery provided by the embodiment.
Since the electronic device described in this embodiment is an electronic device used for implementing the method for processing information in this embodiment, a person skilled in the art can understand the specific implementation manner of the electronic device of this embodiment and various variations thereof based on the method for processing information described in this embodiment, and therefore, how to implement the method in this embodiment by the electronic device is not described in detail here. Electronic devices used by those skilled in the art to implement the method for processing information in the embodiments of the present application are all within the scope of the present application.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the better first graphite of multiplying power that charges is coated through the surface edge at anode plate to this embodiment, and middle part region coating second graphite can reduce the multiplying power difference that charges between the marginal zone on anode plate surface and the middle part region, and then can reduce the marginal zone probability that the lithium phenomenon appears analyzing, improves the multiplying power that charges at anode plate edge greatly, makes the pole piece edge can bear bigger electric current. The scheme provided by the embodiment can greatly prolong the cycle life of the battery cell and increase the endurance mileage of the whole vehicle on the premise of not changing a battery system, a structure and cost.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A lithium ion battery is characterized by comprising an isolating membrane, an anode pole piece, a cathode pole piece and electrolyte for soaking the anode pole piece and the cathode pole piece, wherein the isolating membrane is arranged between the anode pole piece and the cathode pole piece;
the surface of the anode piece comprises an edge area and a middle area, wherein the edge area of the surface of the anode piece is coated with first graphite, the middle area of the surface of the anode piece is coated with second graphite, the middle area is an area, except the edge area, in the surface of the anode piece, and the charging rate of the first graphite is greater than that of the second graphite.
2. The lithium ion battery of claim 1, wherein the anode tab, the separator film, and the cathode tab are in a stacked state.
3. The lithium ion battery of claim 1, wherein the anode sheet, the separator, and the cathode sheet are in a rolled state.
4. The lithium ion battery of claim 3, wherein a first edge sub-region and a second edge sub-region of the anode pole piece coat the first graphite, wherein the first edge sub-region refers to a region of the edge region on a side away from a tab of the anode pole piece, and the second edge sub-region refers to a region of the edge region on a side close to the tab of the anode pole piece.
5. The lithium ion battery of claim 1, wherein the edge region is coated with the first graphite having a width in the first direction of the anode sheet that is between 1% and 50% of the width of the anode sheet in the first direction.
6. The lithium ion battery according to claim 5, wherein when two edge sub-regions are distributed in the first direction of the anode pole piece, widths of the first graphite of the two edge sub-regions distributed in the first direction of the anode pole piece are the same.
7. The lithium ion battery of claim 5, wherein the width of the first graphite coated by the edge region in the second direction of the anode sheet is 1% to 50% of the width of the anode sheet in the second direction; the first direction and the second direction are perpendicular to each other.
8. The lithium ion battery according to claim 7, wherein when two edge sub-regions are distributed in the second direction of the anode pole piece, widths of the first graphite of the two edge sub-regions distributed in the second direction of the anode pole piece are the same.
9. The lithium ion battery of claim 1, wherein the first graphite coated on the edge region of the anode sheet surface comprises at least one of etched graphite, foamed graphite, functionalized graphite, micro-expanded graphite, coated graphite, and doped graphite.
10. An electric vehicle comprising a lithium ion battery as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210036719.5A CN114512635A (en) | 2022-01-13 | 2022-01-13 | Lithium ion battery and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210036719.5A CN114512635A (en) | 2022-01-13 | 2022-01-13 | Lithium ion battery and electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832606A (en) * | 2022-11-23 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Isolation film, lithium ion battery, battery module, battery pack and electric device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310343A (en) * | 2020-11-02 | 2021-02-02 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery containing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310343A (en) * | 2020-11-02 | 2021-02-02 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery containing same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832606A (en) * | 2022-11-23 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Isolation film, lithium ion battery, battery module, battery pack and electric device |
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Application publication date: 20220517 |