Cylindrical battery cell structure of lithium battery and lithium battery

Abstract

The utility model provides a cylindrical battery cell structure of a lithium battery and the lithium battery. The cylindrical battery cell structure of the lithium battery comprises a battery cell body (103) and a pole piece arranged at the end part of the battery cell body (103), the pole piece comprises leveling area tabs (101) and rubbing area tabs (102), the leveling area tabs (101) and the rubbing area tabs (102) are ring-shaped, and the leveling area tabs (101) and the rubbing area tabs (102) are alternately arranged along the radial direction of the battery cell body (103). The cylindrical battery cell structure of the lithium battery can reduce the internal resistance of the battery, reduce the polarization of the battery and improve the cycle performance and the rate capability of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a lithium battery cylindrical core structure and a lithium battery. Background Art

[0002] Currently, cylindrical battery cells mostly use the tab flattening process, but this method has the following defects: the end face after flattening is relatively dense, and it is difficult for the electrolyte to penetrate into the interior of the battery cell; a large amount of metal dust is easily generated during the flattening process, resulting in excessive self-discharge of the battery cell and easy internal short circuit.

[0003] In order to solve the above problems, the industry has introduced a tab flattening process, but this method will cause the thickness of the inner ring tab stack to be smaller than that of the outer ring, and the thickness consistency of the entire tab area is poor. It has stringent requirements on the positional accuracy of laser welding, and often uses multiple non-continuous welding trajectories. It is impossible to achieve full coverage of the welding trajectories of the inner and outer rings, which will lead to the risk of increased internal resistance of cylindrical batteries and deterioration of cycle performance and rate performance. Utility Model Content

[0004] The main purpose of the utility model is to provide a lithium battery cylindrical cell structure and a lithium battery, which can reduce the internal resistance of the battery, reduce the polarization of the battery, and improve the cycle performance and rate performance of the battery.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a lithium battery cylindrical cell structure is provided, including a cell body and a pole piece arranged at the end of the cell body, the pole piece including a flattened area pole ear and a kneaded area pole ear, the flattened area pole ear and the kneaded area pole ear are both in the shape of a circular ring, and the flattened area pole ear and the kneaded area pole ear are alternately arranged along the radial direction of the cell body.

[0006] Further, the pole piece includes an inner ring and an outer ring, the flattening area tab is located in the inner ring, and the flattening area tab is located in the outer ring; or, the pole piece includes an inner ring and an outer ring, the flattening area tab is located in the outer ring, and the flattening area tab is located in the inner ring.

[0007] Further, the pole piece includes an inner ring, a middle ring and an outer ring, the flattening area pole ears are located in the inner ring and the outer ring, and the flattening area pole ears are located in the middle ring; or, the pole piece includes an inner ring, a middle ring and an outer ring, the flattening area pole ears are located in the middle ring, and the flattening area pole ears are located in the inner ring and the outer ring.

[0008] Furthermore, the battery cell body includes a central through hole, and when the flattened area pole ear is located in the inner circle, there is a first preset distance between the flattened area pole ear and the inner wall of the central through hole, and there is a second preset distance between the flattened area pole ear and the flattened area pole ear; or, when the flattened area pole ear is located in the inner circle, there is a first preset distance between the flattened area pole ear and the inner wall of the central through hole, and there is a second preset distance between the flattened area pole ear and the flattened area pole ear.

[0009] Further, the electrode sheet includes a positive electrode sheet, the positive electrode sheet includes an inner ring and an outer ring, the flattened area electrode ear includes a positive electrode flattened electrode ear, the flattened area electrode ear includes a flattened area electrode ear, the positive electrode flattened electrode ear is located in the inner ring, and the flattened area electrode ear is located in the outer ring; or, the positive electrode flattened electrode ear is located in the outer ring, and the flattened area electrode ear is located in the inner ring.

[0010] Further, the electrode sheet includes a positive electrode sheet, the positive electrode sheet includes an inner circle, a middle circle and an outer circle, the flattened area electrode ear includes a positive electrode flattened electrode ear, the flattened area electrode ear includes a flattened area electrode ear, the positive electrode flattened electrode ear is located at the inner circle and the outer circle, and the flattened area electrode ear is located at the middle circle; or, the positive electrode flattened electrode ear is located at the middle circle, and the flattened area electrode ear is located at the inner circle and the outer circle.

[0011] Further, the electrode sheet includes a negative electrode sheet, the negative electrode sheet includes an inner ring and an outer ring, the flattened area electrode ear includes a negative electrode flattened electrode ear, the flattened area electrode ear includes a negative electrode flattened electrode ear, the negative electrode flattened electrode ear is located in the inner ring, and the negative electrode flattened electrode ear is located in the outer ring; or, the negative electrode flattened electrode ear is located in the outer ring, and the negative electrode flattened electrode ear is located in the inner ring.

[0012] Further, the electrode sheet includes a negative electrode sheet, the negative electrode sheet includes an inner circle, a middle circle and an outer circle, the flattened area electrode ear includes a negative electrode flattened electrode ear, the flattened area electrode ear includes a negative electrode flattened electrode ear, the negative electrode flattened electrode ear is located at the inner circle and the outer circle, and the negative electrode flattened electrode ear is located at the middle circle; or, the negative electrode flattened electrode ear is located at the middle circle, and the negative electrode flattened electrode ear is located at the inner circle and the outer circle.

[0013] Furthermore, the height of the flattened area tab is smaller than the height of the flattened area tab; and / or, the flattened area tab includes a plurality of single tabs tilted relative to the end surface of the cell body, and the plurality of single tabs are spaced apart.

[0014] According to another aspect of the utility model, a lithium battery is provided, including a lithium battery cylindrical cell structure, and the lithium battery cylindrical cell structure is the above-mentioned lithium battery cylindrical cell structure.

[0015] By applying the technical solution of the utility model, the cylindrical cell structure of lithium battery includes a cell body and a pole piece arranged at the end of the cell body, the pole piece includes a flattening area pole ear and a kneading area pole ear, the flattening area pole ear and the kneading area pole ear are both in a circular ring shape, and the flattening area pole ear and the kneading area pole ear are alternately arranged along the radial direction of the cell body. The cylindrical cell structure of lithium battery combines the advantages of the kneading ear and the flattening ear schemes, can improve the thickness consistency of the entire pole ear area, ensure that the welding track of the battery pole ear can be evenly covered from the center through hole to the outermost circle, which is conducive to reducing the internal resistance of the battery, reducing the polarization of the battery, and improving the battery cycle performance and rate performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A three-dimensional structural diagram showing a cylindrical lithium battery cell structure according to an embodiment of the present invention;

[0018] Figure 2 Shows Figure 1 AA section structural diagram;

[0019] Figure 3 A schematic diagram showing the structure of the positive electrode sheet and the negative electrode sheet of a cylindrical lithium battery cell structure according to an embodiment of the utility model is shown;

[0020] Figure 4 A three-dimensional structural diagram showing a cylindrical lithium battery cell structure according to an embodiment of the present invention;

[0021] Figure 5 Shows Figure 4 BB-direction cross-sectional structural diagram;

[0022] Figure 6 A schematic diagram showing the structure of the positive electrode sheet and the negative electrode sheet of a cylindrical lithium battery cell structure according to an embodiment of the utility model is shown;

[0023] Figure 7 A three-dimensional structural diagram showing a cylindrical lithium battery cell structure according to an embodiment of the present invention;

[0024] Figure 8 Shows Figure 7 Schematic diagram of the CC-section structure;

[0025] Fig. 9 A schematic structural diagram of a positive electrode sheet and a negative electrode sheet of a cylindrical lithium battery cell structure in one embodiment of the utility model is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Lithium battery cylindrical cell structure; 101. Flattened area ear; 102. Flattened area ear; 103. Cell body; 104. Middle through hole; 20. Positive electrode sheet; 201. Positive electrode flattened ear; 202. Positive electrode flattened ear; 203. Positive electrode coating area; 30. Negative electrode sheet; 301. Negative electrode flattened ear; 302. Negative electrode flattened ear; 303. Negative electrode coating area. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] See also Figures 1 to 9 As shown, the utility model provides a lithium battery cylindrical cell structure, including a cell body 103 and a pole piece arranged at the end of the cell body 103, the pole piece includes a flattening area pole ear 101 and a kneading area pole ear 102, the flattening area pole ear 101 and the kneading area pole ear 102 are both in a circular ring shape, and the flattening area pole ear 101 and the kneading area pole ear 102 are alternately arranged along the radial direction of the cell body 103.

[0030] The cylindrical cell structure of lithium batteries combines the advantages of both the flattened lug and flattened lug solutions, which can improve the thickness consistency of the entire lug area and ensure that the welding track of the battery lug can be evenly covered from the center through hole to the outermost circle, which is beneficial to reducing the internal resistance of the battery, reducing battery polarization, and improving the battery cycle performance and rate performance.

[0031] In this embodiment, each of the flattening area tab 101 and the kneading area tab 102 occupies a complete annular area.

[0032] In one embodiment, the pole piece includes an inner ring and an outer ring, the flattening area pole ear 101 is located in the inner ring, and the flattening area pole ear 102 is located in the outer ring.

[0033] In one embodiment, the pole piece includes an inner ring and an outer ring, the flattening area pole ear 101 is located on the outer ring, and the flattening area pole ear 102 is located on the inner ring.

[0034] In one embodiment, the pole piece includes an inner ring, a middle ring and an outer ring, the flattening area pole lugs 101 are located in the inner ring and the outer ring, and the flattening area pole lugs 102 are located in the middle ring.

[0035] In one embodiment, the pole piece includes an inner ring, a middle ring and an outer ring, the flattening area pole lug 101 is located in the middle ring, and the flattening area pole lug 102 is located in the inner ring and the outer ring.

[0036] In one embodiment, the battery cell body 103 includes a central through hole 104. When the flattened area tab 102 is located in the inner circle, there is a first preset distance between the flattened area tab 102 and the inner wall of the central through hole 104, and there is a second preset distance between the flattened area tab 102 and the flattened area tab 101.

[0037] There is a first preset distance between the flattened area tab 102 and the inner wall of the middle through hole 104, the purpose of which is to prevent the tab from blocking the middle through hole 104 of the cell body 103 after being flattened, thereby affecting the electrolyte infiltration.

[0038] There is a second preset distance between the flattening area tab 102 and the flattening area tab 101 , the purpose of which is to leave enough flattening operation space to prevent the flattening area tab 101 from being damaged during the flattening process.

[0039] In one embodiment, the battery cell body 103 includes a central through hole 104. When the flattening area tab 101 is located in the inner circle, there is a first preset distance between the flattening area tab 101 and the inner wall of the central through hole 104, and there is a second preset distance between the flattening area tab 102 and the flattening area tab 101.

[0040] There is a first preset distance between the flattened area tab 101 and the inner wall of the middle through hole 104, the purpose of which is to prevent the tab from blocking the middle through hole 104 of the cell body 103 after being flattened, thereby affecting the electrolyte infiltration.

[0041] There is a second preset distance between the flattening area tab 102 and the flattening area tab 101 , the purpose of which is to leave enough flattening operation space to prevent the flattening area tab 101 from being damaged during the flattening process.

[0042] In one embodiment, the electrode sheet includes a positive electrode sheet 20, the positive electrode sheet 20 includes an inner ring and an outer ring, the flattening area electrode ear 101 includes a positive electrode flattening electrode ear 201, the flattening area electrode ear 102 includes a flattening area electrode ear 102, the positive electrode flattening electrode ear 201 is located in the inner ring, and the flattening area electrode ear 102 is located in the outer ring.

[0043] In this embodiment, for the positive electrode sheet 20, the tab area is radially arranged from the inside to the outside, and is composed of a plurality of single tabs spaced apart from each other and having a certain inclination angle. There is a certain distance between the tab and the inner wall of the middle through hole 104 of the positive electrode sheet 20, and the purpose is to prevent the tab from clogging the middle through hole of the cell body 103 after being flattened, thereby affecting the electrolyte infiltration; the positive flattened tab 202 is a continuous tab, and there is a certain distance between it and the positive flattened tab 201, and the purpose is to leave enough flattening operation space to prevent the positive flattened tab 201 from being damaged during the flattening process.

[0044] In this embodiment, the inner circle of the battery body 103 is the flattening area tab 101, and the layers of tabs are stacked on each other; the outer circle is the flattening area tab 102, which can be flattened mechanically or ultrasonically.

[0045] In one embodiment, the electrode sheet includes a positive electrode sheet 20, the positive electrode sheet 20 includes an inner ring and an outer ring, the flattening area electrode ear 101 includes a positive electrode flattening electrode ear 201, the flattening area electrode ear 102 includes a flattening area electrode ear 102, the positive electrode flattening electrode ear 201 is located in the outer ring, and the flattening area electrode ear 102 is located in the inner ring.

[0046] In the present embodiment, the pole ear area is radially arranged from the inside to the outside in sequence: the positive electrode flattened pole ear 202 and the positive electrode flattened pole ear 201; the positive electrode flattened pole ear 202 is a continuous pole ear, and there is a certain distance between it and the first side of the positive electrode sheet close to the middle through hole 104, the purpose of which is to prevent the pole ear from clogging the middle through hole 104 of the battery cell body 103 after being flattened, thereby affecting the infiltration of the electrolyte; there is a certain distance between the positive electrode flattened pole ear 202 and the positive electrode flattened pole ear 201, the purpose of which is to leave enough flattening operation space to prevent damage to the positive electrode flattened pole ear 201 during the flattening process; the positive electrode flattened pole ear 201 is composed of a plurality of single pole ears that are spaced from each other and have a certain inclination angle.

[0047] In this embodiment, the outer circle of the battery body 103 is the flattening area tab 101, and the layers of tabs are stacked on each other; the inner circle is the flattening area tab 102, which can be flattened mechanically or ultrasonically.

[0048] In one embodiment, the electrode sheet includes a positive electrode sheet 20, the positive electrode sheet 20 includes an inner circle, a middle circle and an outer circle, the flattening area electrode ear 101 includes a positive electrode flattening electrode ear 201, the flattening area electrode ear 102 includes a flattening area electrode ear 102, the positive electrode flattening electrode ear 201 is located in the inner circle and the outer circle, and the flattening area electrode ear 102 is located in the middle circle.

[0049] In this embodiment, for the positive electrode sheet 20, the tab area is radially arranged from the inside to the outside, namely, the positive flattened tab 201, the positive flattened tab 202, and the positive flattened tab 201. The positive flattened tab 201 is composed of a plurality of single tabs spaced apart from each other and having a certain inclination angle, and there is a certain distance between it and the inner wall of the middle through hole 104 of the battery cell body 103, the purpose of which is to prevent the tab from clogging the middle through hole of the battery cell body 103 after being flattened, thereby affecting the electrolyte infiltration; the positive flattened tab 202 is a continuous tab, and there is a certain distance between it and the positive flattened tabs 201 on both the inner and outer sides, the purpose of which is to leave enough flattening operation space to prevent the positive flattened tab 201 from being damaged during the flattening process.

[0050] In this embodiment, the inner and outer circles of the cell body 103 are both flattening area tabs 101, and the layers of tabs are stacked on each other; the middle circle is the flattening area tab 102, which can be flattened mechanically or ultrasonically.

[0051] In one embodiment, the electrode sheet includes a positive electrode sheet 20, the positive electrode sheet 20 includes an inner circle, a middle circle and an outer circle, the flattening area electrode ear 101 includes a positive electrode flattening electrode ear 201, the flattening area electrode ear 102 includes a flattening area electrode ear 102, the positive electrode flattening electrode ear 201 is located in the middle circle, and the flattening area electrode ear 102 is located in the inner circle and the outer circle.

[0052] In one embodiment, the electrode sheet includes a negative electrode sheet 30, the negative electrode sheet 30 includes an inner ring and an outer ring, the flattening area electrode ear 101 includes a negative electrode flattening electrode ear 301, the flattening area electrode ear 102 includes a negative electrode flattening electrode ear 302, the negative electrode flattening electrode ear 301 is located in the inner ring, and the negative electrode flattening electrode ear 302 is located in the outer ring.

[0053] In this embodiment, for the negative electrode sheet 30, the tab area is radially from the inside to the outside and is composed of a negative electrode flattened tab 301 and a negative electrode flattened tab 302. The negative electrode flattened tab 301 is composed of a plurality of single tabs that are spaced apart from each other and have a certain inclination angle. There is a certain distance between it and the inner wall of the middle through hole 104 of the positive electrode sheet 20, so as to prevent the tab from clogging the middle through hole of the battery cell body 103 after being flattened, thereby affecting the infiltration of the electrolyte. The negative electrode flattened tab 302 is a continuous tab, and there is a certain distance between it and the negative electrode flattened tab 301, so as to leave enough flattening operation space to prevent damage to the negative electrode flattened tab 301 during the flattening process.

[0054] In one embodiment, the electrode sheet includes a negative electrode sheet 30, the negative electrode sheet 30 includes an inner ring and an outer ring, the flattening area electrode ear 101 includes a negative electrode flattening electrode ear 301, the flattening area electrode ear 102 includes a negative electrode flattening electrode ear 302, the negative electrode flattening electrode ear 301 is located in the outer ring, and the negative electrode flattening electrode ear 302 is located in the inner ring.

[0055] In this embodiment, for the negative electrode sheet 30, the tab area is radially from the inside to the outside, and is sequentially a negative electrode flattened tab 302 and a negative electrode flattened tab 301. The negative electrode flattened tab 302 is a continuous tab, and there is a certain distance between it and the inner wall of the middle through hole 104 of the positive electrode sheet 20, the purpose of which is to prevent the tab from blocking the middle through hole of the battery cell body 103 after being flattened, thereby affecting the electrolyte infiltration; there is a certain distance between the negative electrode flattened tab 302 and the negative electrode flattened tab 301, the purpose of which is to leave enough flattening operation space to prevent damage to the negative electrode flattened tab 301 during the flattening process; the negative electrode flattened tab 301 is composed of a plurality of single tabs that are spaced apart from each other and have a certain inclination angle.

[0056] In one embodiment, the electrode sheet includes a negative electrode sheet 30, the negative electrode sheet 30 includes an inner circle, a middle circle and an outer circle, the flattening area electrode ear 101 includes a negative electrode flattening electrode ear 301, the flattening area electrode ear 102 includes a negative electrode flattening electrode ear 302, the negative electrode flattening electrode ear 301 is located in the inner circle and the outer circle, and the negative electrode flattening electrode ear 302 is located in the middle circle.

[0057] In this embodiment, for the negative electrode sheet 30, the tab area is radially arranged from the inside to the outside, and is composed of a negative flattened tab 301, a negative flattened tab 302, and a negative flattened tab 301. The negative flattened tab 301 is composed of a plurality of single tabs spaced apart from each other and having a certain inclination angle, and there is a certain distance between it and the inner wall of the middle through hole 104 of the battery cell body 103, the purpose of which is to prevent the tab from clogging the middle through hole 104 of the battery cell body 103 after being flattened, thereby affecting the electrolyte infiltration; the negative flattened tab 302 is a continuous tab, and there is a certain distance between it and the negative flattened tabs 301 on both the inner and outer sides, the purpose of which is to leave enough flattening operation space to prevent the negative flattened tab 301 from being damaged during the flattening process.

[0058] In one embodiment, the electrode sheet includes a negative electrode sheet 30, the negative electrode sheet 30 includes an inner circle, a middle circle and an outer circle, the flattening area electrode ear 101 includes a negative electrode flattening electrode ear 301, the flattening area electrode ear 102 includes a negative electrode flattening electrode ear 302, the negative electrode flattening electrode ear 301 is located in the middle circle, and the negative electrode flattening electrode ear 302 is located in the inner circle and the outer circle.

[0059] In one embodiment, the height of the flattened area tab 102 is less than the height of the flattened area tab 101. In this embodiment, the height of the flattened area tab is less than the height of the flattened area tab, the purpose of which is to ensure that after the tabs are flattened and flattened, the heights of the flattened area tabs 101 and 102 remain consistent, which is beneficial to the stability of laser welding.

[0060] In one embodiment, the relationship between the height of the flattened area tab 102 and the height of the flattened area tab 101 may not be limited.

[0061] In one embodiment, the flattening area tab 101 includes a plurality of single tabs that are arranged obliquely relative to the end surface of the cell body 103 , and the plurality of single tabs are arranged at intervals.

[0062] The positive electrode sheet 20 , the negative electrode sheet 30 , and the separator are wound to obtain the battery cell body 103 . At this time, the positive electrode coating area 203 and the negative electrode coating area 303 are both located at the battery cell body 103 , and the positive electrode sheet 20 and the negative electrode sheet 30 are respectively located at the two ends of the battery cell body 103 .

[0063] In one embodiment, the pole piece can be further divided into more circles, and the pole tabs 101 in the flattened area and the pole tabs 102 in the kneaded area are sequentially distributed within the range of different circles along the radial direction of the battery cell body 103 .

[0064] According to an embodiment of the present invention, the lithium battery includes a lithium battery cylindrical cell structure 10, which is the above-mentioned lithium battery cylindrical cell structure.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cylindrical lithium battery cell structure, characterized in that: The invention comprises a battery cell body (103) and a pole piece arranged at the end of the battery cell body (103), wherein the pole piece comprises a flattening area pole ear (101) and a kneading area pole ear (102), wherein the flattening area pole ear (101) and the kneading area pole ear (102) are both in annular shape, and the flattening area pole ear (101) and the kneading area pole ear (102) are alternately arranged along the radial direction of the battery cell body (103).

2. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The pole piece comprises an inner ring and an outer ring, the flattening zone pole lug (101) is located in the inner ring, and the flattening zone pole lug (102) is located in the outer ring; or, the pole piece comprises an inner ring and an outer ring, the flattening zone pole lug (101) is located in the outer ring, and the flattening zone pole lug (102) is located in the inner ring.

3. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The pole piece comprises an inner ring, a middle ring and an outer ring, the flattening area pole lug (101) is located at the inner ring and the outer ring, and the flattening area pole lug (102) is located at the middle ring; or, the pole piece comprises an inner ring, a middle ring and an outer ring, the flattening area pole lug (101) is located at the middle ring, and the flattening area pole lug (102) is located at the inner ring and the outer ring.

4. The cylindrical lithium battery cell structure according to claim 2 or 3, characterized in that: The battery cell body (103) comprises a middle through hole (104); when the flattening zone pole lug (102) is located in the inner circle, there is a first preset distance between the flattening zone pole lug (102) and the inner wall of the middle through hole (104), and there is a second preset distance between the flattening zone pole lug (102) and the flattening zone pole lug (101); or, when the flattening zone pole lug (101) is located in the inner circle, there is a first preset distance between the flattening zone pole lug (101) and the inner wall of the middle through hole (104), and there is a second preset distance between the flattening zone pole lug (102) and the flattening zone pole lug (101).

5. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The electrode sheet comprises a positive electrode sheet (20), the positive electrode sheet (20) comprises an inner ring and an outer ring, the flattening area electrode ear (101) comprises a positive electrode flattening electrode ear (201), the flattening area electrode ear (102) comprises a flattening area electrode ear (102), the positive electrode flattening electrode ear (201) is located in the inner ring, and the flattening area electrode ear (102) is located in the outer ring; or, the positive electrode flattening electrode ear (201) is located in the outer ring, and the flattening area electrode ear (102) is located in the inner ring.

6. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The electrode sheet comprises a positive electrode sheet (20), the positive electrode sheet (20) comprises an inner ring, a middle ring and an outer ring, the flattening area electrode ear (101) comprises a positive electrode flattening electrode ear (201), the flattening area electrode ear (102) comprises a flattening area electrode ear (102), the positive electrode flattening electrode ear (201) is located at the inner ring and the outer ring, and the flattening area electrode ear (102) is located at the middle ring; or, the positive electrode flattening electrode ear (201) is located at the middle ring, and the flattening area electrode ear (102) is located at the inner ring and the outer ring.

7. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The electrode sheet comprises a negative electrode sheet (30), the negative electrode sheet (30) comprises an inner ring and an outer ring, the flattening area electrode ear (101) comprises a negative electrode flattening electrode ear (301), the flattening area electrode ear (102) comprises a negative electrode flattening electrode ear (302), the negative electrode flattening electrode ear (301) is located in the inner ring, and the negative electrode flattening electrode ear (302) is located in the outer ring; or, the negative electrode flattening electrode ear (301) is located in the outer ring, and the negative electrode flattening electrode ear (302) is located in the inner ring.

8. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The electrode sheet comprises a negative electrode sheet (30), the negative electrode sheet (30) comprises an inner ring, a middle ring and an outer ring, the flattened area electrode ear (101) comprises a negative electrode flattened electrode ear (301), the flattened area electrode ear (102) comprises a negative electrode flattened electrode ear (302), the negative electrode flattened electrode ear (301) is located at the inner ring and the outer ring, and the negative electrode flattened electrode ear (302) is located at the middle ring; or, the negative electrode flattened electrode ear (301) is located at the middle ring, and the negative electrode flattened electrode ear (302) is located at the inner ring and the outer ring.

9. The cylindrical lithium battery cell structure according to claim 1, characterized in that: The height of the flattened area pole lug (102) is smaller than the height of the flattened area pole lug (101); and / or the flattened area pole lug (101) comprises a plurality of single pole lugs inclined relative to the end surface of the battery cell body (103), and the plurality of single pole lugs are spaced apart from each other.

10. A lithium battery, comprising a lithium battery cylindrical cell structure (10), characterized in that: The cylindrical lithium battery cell structure is the cylindrical lithium battery cell structure according to any one of claims 1 to 9.

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