A cylindrical battery structure with full tab and multi-tab combination

Abstract

The utility model relates to battery technical field, a kind of cylindrical full tab and multi-tab comprehensive battery structure, including battery main body, the battery main body includes battery shell, the electric core and winding column being set in battery shell, the battery shell includes shell and respectively set in the cap and base of shell two ends, the electric core includes positive pole sheet, diaphragm and negative pole sheet, when battery side emphasis high rate discharge, the positive pole uses full tab design, the negative pole uses multi-tab design;When battery side emphasis rapid charging, the negative pole uses full tab design, the positive pole uses multi-tab design.The dynamic combination of the positive pole and the negative pole full tab structure and multi-tab structure, the combination structure of the positive pole full tab design and the negative pole multi-tab design is used to improve the high rate discharge efficiency of battery, the combination structure of the positive pole multi-tab design and the negative pole full tab design is used to improve the rapid charging efficiency of battery, directional breakthrough of battery performance under specific demand is realized.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cylindrical battery structure that integrates all tabs and multiple tabs. Background Technology

[0002] Cylindrical secondary batteries occupy an important position in the fields of power batteries and energy storage due to their high degree of standardization, moderate energy density, and excellent mechanical strength. The tabs, as key components connecting the electrodes to external circuits, can significantly reduce the battery's internal resistance and temperature rise during discharge. Their structural design directly determines the battery's internal resistance distribution, charge / discharge uniformity, production efficiency, and safety.

[0003] In the existing technology, the electrode design of batteries is mostly a fixed pattern of single electrode, double electrode or full electrode, which cannot distinguish the differentiated needs of high-rate discharge and fast charging. Although full electrode can improve rate performance, the large number of electrodes occupies the edge space of the electrode, which leads to difficulty in electrolyte penetration, long electrolyte injection time and poor battery consistency. On the other hand, single and double electrodes have higher internal resistance, which reduces battery performance. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a cylindrical battery structure that integrates all tabs and multiple tabs, aiming to improve the problem that the fixed design of the tab structure in existing batteries is difficult to adapt to directional performance requirements, resulting in a decline in battery performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cylindrical battery structure integrating all tabs and multiple tabs, comprising a battery body, characterized in that: the battery body includes a battery shell, a battery cell disposed within the battery shell, and a winding post; the battery shell includes an outer shell and caps and a base respectively disposed at both ends of the outer shell; the battery cell includes a positive electrode, a separator, and a negative electrode; the positive electrode, separator, and negative electrode are stacked and wound around the winding post to form the battery cell; one end of the battery cell is the positive electrode, and the other end is the negative electrode; the cap is disposed outside the positive electrode, and the base is disposed outside the negative electrode;

[0006] When the battery is designed for high-rate discharge, the positive electrode adopts a full-tab design and the negative electrode adopts a multi-tab design.

[0007] When the battery focuses on fast charging, the negative electrode adopts an all-tab design, and the positive electrode adopts a multi-tab design.

[0008] Unlike traditional batteries with fixed single-tab, double-tab, or full-tab designs, this technical solution employs two tab structures tailored to battery performance requirements. When high-rate discharge performance is prioritized, the positive electrode uses a full-tab design to minimize electron conduction paths and reduce positive electrode impedance, thereby improving discharge rate performance. Conversely, the negative electrode uses a multi-tab design to reduce obstruction of the electrolyte injection channel. When fast charging is emphasized, the negative electrode uses a full-tab design to ensure more uniform current distribution and reduce the risk of lithium dendrite formation, thus improving fast-charging performance. This battery structure dynamically combines full-tab and multi-tab structures for both positive and negative electrodes according to actual needs, specifically improving battery performance under particular requirements and enhancing electrolyte injection efficiency.

[0009] Preferably, the positive electrode sheet includes a positive active material sheet and a positive coating layer coated on its surface, and the negative electrode sheet includes a negative active material sheet and a negative coating layer coated on its surface. The positive and negative coating layers are disposed at the positive or negative electrode of the battery. The coating method is multiple coating or single coating, and the thickness of both the positive and negative coating layers is 1-30 μm.

[0010] Preferably, the positive electrode tab is designed as follows: one side of the positive electrode active material sheet is provided with an uncoated positive electrode flattening area, the outer wall of the positive electrode flattening area is fixed with an aluminum disk by welding, the outer wall of the aluminum disk is provided with one positive electrode tab unit, the positive electrode tab unit is welded to the inner wall of the cap, and the aluminum disk covers 85-95% of the total area of ​​the positive electrode flattening area;

[0011] The negative electrode is designed with multiple tabs: multiple negative electrode tab units are arranged along one edge of the negative electrode active material sheet, and the negative electrode tab units are arranged inside the base.

[0012] Preferably, the tab of the negative electrode is designed as follows: one side of the negative electrode active material sheet is provided with an uncoated negative electrode flattening area, the outer wall of the negative electrode flattening area is fixed with a nickel disk by welding, the nickel disk is welded to the inner wall of the base, and the nickel disk covers 85-95% of the total area of ​​the negative electrode flattening area.

[0013] The positive electrode is designed with multiple positive electrode tabs: multiple positive electrode tab units are arranged along one edge of the positive electrode active material sheet, and the positive electrode tab units are arranged inside the cap.

[0014] Preferably, the width of the positive electrode flattening area is 1-35mm, the width of the positive electrode tab unit is 1-100mm and the thickness is 0.01-10mm, the width of the negative electrode tab unit is 1-100mm and the thickness is 0.01-10mm, the spacing between adjacent negative electrode tab units is 2-10mm, the total area of ​​the negative electrode tab units accounts for 5-40% of the edge area of ​​the negative electrode active material sheet, the material of the positive electrode tab unit is any one of aluminum or aluminum alloy, and the material of the negative electrode tab unit is any one or more of nickel, copper, or nickel alloy.

[0015] Preferably, the width of the negative electrode flattening area is 1-35mm, the spacing between adjacent positive electrode tab units is 2-10mm, and the total area of ​​the positive electrode tab units accounts for 5-40% of the edge area of ​​the positive electrode active material sheet.

[0016] Preferably, both the positive electrode tab unit and the negative electrode tab unit are wrapped with insulating tape, and a portion of the positive electrode tab unit and the negative electrode tab unit extends beyond the insulating tape.

[0017] Preferably, the battery body is a lithium-ion battery or a sodium-ion battery.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, by dynamically combining the positive and negative electrode omni-tab structure and the multi-tab structure, the high-rate discharge efficiency of the battery is improved by utilizing the combination structure of the positive electrode omni-tab design and the negative electrode multi-tab design, and the fast charging efficiency of the battery is improved by utilizing the combination structure of the positive electrode multi-tab design and the negative electrode omni-tab design, thus achieving a targeted breakthrough in battery performance under specific requirements.

[0020] 2. In this utility model, by adopting a multi-tab structure for one electrode of the battery, more gaps are retained at the edge of the electrode, avoiding the obstruction of the electrolyte injection channel by the full tab structure, thereby improving the electrolyte penetration efficiency and enabling the electrolyte to quickly penetrate into the electrode, thus improving the battery manufacturing efficiency.

[0021] 3. In this utility model, the full tab design reduces local overheating of the battery, and the multi-tab design improves electrolyte distribution, inhibits dendrite growth, and increases thermal runaway temperature. Moreover, the manufacturing process and method are applicable to all specifications of cylindrical batteries such as 18650, 21700, and 32650, and can directly replace the existing tab design, which has practicality and universality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal structure of a cylindrical battery structure combining all tabs and multiple tabs proposed in this utility model.

[0023] Figure 2 This is a schematic diagram of the overall structure of a high-rate discharge battery with a cylindrical all-tab and multi-tab integrated battery structure proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the positive electrode structure of a high-rate discharge battery structure that integrates cylindrical all-tab and multi-tab battery structures proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the negative electrode structure of a high-rate discharge battery structure that integrates cylindrical all-tab and multi-tab battery structures proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the overall structure of a fast-charging battery with a cylindrical all-tab and multi-tab integrated battery structure proposed in this utility model.

[0027] Figure 6 This is a schematic diagram of the positive electrode structure of a fast-charging battery structure that integrates cylindrical all-tab and multi-tab battery structures proposed in this utility model.

[0028] Figure 7 This is a schematic diagram of the negative electrode structure of a fast-charging battery structure that integrates cylindrical all-tab and multi-tab battery structures proposed in this utility model.

[0029] Legend:

[0030] 1. Battery casing; 101. Outer shell; 102. Cap; 103. Base; 2. Battery cell; 21. Positive electrode sheet; 211. Positive active material sheet; 212. Positive coating layer; 213. Positive flattening area; 22. Separator; 23. Negative electrode sheet; 231. Negative active material sheet; 232. Negative coating layer; 233. Negative flattening area; 3. Winding post; 4. Aluminum disc; 5. Positive electrode tab unit; 6. Negative electrode tab unit; 7. Nickel disc; 8. Insulating tape. Detailed Implementation

[0031] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example 1:

[0033] Reference Figure 1 , Figure 3 and Figure 7This utility model provides an embodiment of a cylindrical battery structure integrating full-tab and multi-tab, including a battery body. The battery body includes a battery shell 1, a battery cell 2 disposed inside the battery shell 1, and a winding post 3. The battery shell 1 includes an outer shell 101 and caps 102 and bases 103 respectively disposed at both ends of the outer shell 101. The battery cell 2 includes a positive electrode 21, a separator 22, and a negative electrode 23. The positive electrode 21, separator 22, and negative electrode 23 are stacked and wound around the winding post 3 to form the battery cell 2. One end of the battery cell 2 is the positive electrode, and the other end is the negative electrode. The cap 102 is disposed outside the positive electrode, and the base 103 is disposed outside the negative electrode.

[0034] When the battery is designed for high-rate discharge, the positive electrode adopts an all-tab design and the negative electrode adopts a multi-tab design.

[0035] When the battery is designed for fast charging, the negative electrode uses an all-tab design, and the positive electrode uses a multi-tab design.

[0036] Specifically, the positive electrode 21, separator 22, and negative electrode 23 are stacked sequentially and wound around the winding post 3 to form the battery cell 2. After injecting electrolyte, it forms the basic structure of the battery together with the external battery casing 1. In the prior art, the electrode tab design of batteries is mostly a fixed pattern of single tab, double tab, or full tab, which cannot distinguish the differentiated needs of high-rate discharge and fast charging. Although full tab can improve rate performance, the large number of tabs occupies the edge space of the electrode, resulting in difficulty in electrolyte penetration, long injection time, and poor battery consistency. On the other hand, single and double tabs have high internal resistance, which reduces battery performance. In response to the existing problems, this invention designs two tab structure designs according to battery performance requirements. When high-rate discharge performance is required, the positive electrode adopts a full tab design. Taking advantage of the poor conductivity of the positive electrode material (such as ternary material, lithium iron phosphate), the electron conduction path is shortened to the maximum extent by increasing the number of tabs. The positive electrode reduces impedance, thereby improving discharge rate performance. The negative electrode adopts a multi-tab design. Since the negative electrode material (such as graphite) has good conductivity, a bitab design can meet the current conduction requirements and reduce the obstruction of the electrode to the electrolyte injection channel. When the fast charging performance of the battery is important, the negative electrode 23 adopts a full-tab design. During fast charging, the negative electrode is prone to concentration gradients (lithium ion, sodium ion) and local current concentration. The full-tab design of the negative electrode can make the current distribution more uniform and reduce the risk of lithium dendrite formation, thereby improving fast charging performance. The positive electrode 21 adopts a bitab design, which provides sufficient channels for electrolyte penetration while ensuring a certain current conduction capacity, ensuring the electrolyte injection effect. The dynamic combination of full-tab and multi-tab structures of the positive and negative electrodes according to actual needs not only solves the problem of difficult electrolyte injection of full-tab electrodes, but also improves the battery performance under specific requirements.

[0037] Please see the appendix Figure 3 and attached Figure 7The positive electrode 21 includes a positive active material sheet 211 and a positive coating layer 212 coated on its surface. The negative electrode 23 includes a negative active material sheet 231 and a negative coating layer 232 coated on its surface. The positive coating layer 212 and the negative coating layer 232 are disposed at the positive or negative electrode of the battery. The coating method is multiple coating or single coating. The thickness of the positive coating layer 212 and the negative coating layer 232 is 1-30μm.

[0038] Specifically, positive electrode active material sheet 211 and negative electrode active material sheet 231 are prepared by mixing PVDF and boehmite in a certain proportion. The basic structure of positive electrode sheet 211 is positive electrode active material sheet 211, and a slurry is coated on it to form positive electrode coating layer 212. Correspondingly, the basic structure of negative electrode sheet 231 is negative electrode active material sheet 231 and negative electrode coating layer 232. The coating layer can be applied to the positive electrode or the negative electrode of the active material sheet. Depending on the actual cost or performance requirements, one layer or multiple layers can be applied. The total coating thickness is 1-30μm, which meets the capacity requirements of mainstream cylindrical batteries without affecting the subsequent injection and penetration of electrolyte.

[0039] Example 2:

[0040] The following section provides a detailed explanation of the battery structure required for high-rate discharge. (Refer to...) Figures 2-4 The positive electrode tab design is as follows: one side of the positive electrode active material sheet 211 is provided with an uncoated positive electrode flattening area 213, the outer wall of the positive electrode flattening area 213 is fixed with an aluminum disk 4 by welding, the outer wall of the aluminum disk 4 is provided with a positive electrode tab unit 5, the positive electrode tab unit 5 is welded to the inner wall of the cap 102, and the aluminum disk 4 covers 85-95% of the total area of ​​the positive electrode flattening area 213;

[0041] The negative electrode is designed with multiple tabs: multiple negative electrode tab units 6 are arranged along one edge of the negative electrode active material sheet 231, and the negative electrode tab units 6 are arranged inside the base 103.

[0042] Specifically, during battery discharge, electrons flow from the negative electrode to the positive electrode through the external circuit. However, the positive electrode material usually has poor conductivity. By setting the positive electrode as a full tab structure, a blank edge is left on one side of the positive electrode active material sheet 211 without coating it with active material, forming a positive electrode flattening area 213. After flattening, an aluminum disk 4 is directly welded to one end using laser or other methods. Then, an aluminum positive electrode tab unit 5 is set on the edge of the aluminum disk 4 for welding the battery cap 102 for a firm connection. This increases the number of positive electrode current collection points by 4-8 times and ensures that the aluminum disk 4 can cover 85-95% of the positive electrode flattening area 213. This greatly shortens the electron conduction path length compared to the traditional bitab design. According to the formula: R = ρ × L / S (where R is resistance, ρ is resistivity, L is conduction path length, and S is conductive cross-sectional area), the shortening of the path length significantly reduces the ohmic resistance of the positive electrode, thereby improving the battery's discharge rate performance.

[0043] Since the negative electrode material has good conductivity, a multi-tab structure can meet the current conduction requirements. Multiple negative electrode tab units 6 are directly connected to one side of the negative electrode active material sheet 231 coated with active material to form a conduction channel. This avoids the full tab structure blocking the liquid injection channel, improves the electrolyte penetration efficiency, and thus improves the liquid injection efficiency in the manufacturing process and the high-rate discharge performance of the battery.

[0044] Example 3:

[0045] The following section provides a detailed explanation of the battery structure required for fast charging. (Refer to...) Figures 5-7 The negative electrode tab is designed as follows: one side of the negative electrode active material sheet 231 is provided with an uncoated negative electrode flattening area 233, and the outer wall of the negative electrode flattening area 233 is fixed with a nickel disk 7 by welding. The nickel disk 7 is welded to the inner wall of the base 103, and the nickel disk 7 covers 85-95% of the total area of ​​the negative electrode flattening area 233.

[0046] The positive electrode is designed with multiple tabs: multiple positive electrode tab units 5 are arranged along one edge of the positive electrode active material sheet 211, and the positive electrode tab units 5 are arranged inside the cap 102.

[0047] Specifically, during battery charging, lithium or sodium ions are extracted from the positive electrode and inserted into the negative electrode. The insertion rate of lithium or sodium ions on the surface of the negative electrode needs to match the diffusion rate. Since the negative electrode material has good conductivity, it is easy to form a concentration gradient due to insufficient ion insertion rate during fast charging, which leads to the formation of lithium / sodium dendrites, a bottleneck for ion diffusion. Therefore, it is necessary to reduce the current density to alleviate this problem. The negative electrode is designed as a full tab structure, leaving an uncoated active material on one side of the negative electrode active material sheet 231 to form a flattened negative electrode area 233. After flattening, the nickel disk 7 is welded and directly fixed to the base 103 of the battery case 1, which increases the total area of ​​the tab. According to the formula: i = I / A (where i is the current density, I is the total current, and A is the total area of ​​the tab), the total area A of the tab increases, and the current density i will decrease, reducing the risk of local overcharging and lithium dendrite formation, thereby achieving a higher charging rate.

[0048] Meanwhile, the positive electrode adopts a multi-tab structure, reducing the number of tabs by 60-70% compared to a full-tab structure. More gaps are retained at the electrode edges, allowing the electrolyte to quickly penetrate into the electrode. Experiments show that the electrolyte injection time for the bi-tab structure is 30-50% shorter than that for the full-tab structure, and the electrode is more evenly wetted, thus jointly ensuring the battery's fast-charging performance.

[0049] Example 4:

[0050] The specific specifications and dimensions of the electrode plates are explained below. (Refer to...) Figures 3-4 The width of the positive electrode flattening region 213 is 1-35mm, the width of the positive electrode tab unit 5 is 1-100mm and the thickness is 0.01-10mm, the width of the negative electrode tab unit 6 is 1-100mm and the thickness is 0.01-10mm, the spacing between adjacent negative electrode tab units 6 is 2-10mm, the total area of ​​the negative electrode tab units 6 accounts for 5-40% of the edge area of ​​the negative electrode active material sheet 231, the material of the positive electrode tab unit 5 is any one of aluminum or aluminum alloy, the material of the negative electrode tab unit 6 is any one or more of nickel, copper or nickel alloy, the width of the negative electrode flattening region 233 is 1-35mm, the spacing between adjacent positive electrode tab units 5 is 2-10mm, and the total area of ​​the positive electrode tab units 5 accounts for 5-40% of the edge area of ​​the positive electrode active material sheet 211.

[0051] Specifically, the widths of the positive electrode flattening region 213 and the negative electrode flattening region 233 are both 1-35mm, ensuring the reliability of the welding between the tab and the metal disc while avoiding excessive space occupied by the active material. The 1-35mm range covers all cylindrical battery sizes from 14500 to 32650, accommodating welding requirements for different diameters. The tab unit width ranges from 1-100mm; a smaller width is suitable for small-capacity batteries, while a larger width is suitable for large-capacity batteries, adapting to different current requirements and balancing conductivity and space occupation. The thickness ranges from 0.01-10mm; a thinner thickness ensures the flexibility of the tab during winding. To prevent brittle fracture, thicker tabs are suitable for applications requiring high mechanical strength. Stability is ensured during welding of the tabs to the battery casing. The spacing between adjacent tabs is designed to be 2-10mm depending on the number of tabs, ensuring unobstructed electrolyte injection channels and preventing uneven current distribution. The total area of ​​the tabs occupies 5-40% of the edge area of ​​the current collector, balancing the conductivity requirements and space occupancy of the tabs. This avoids performance defects caused by too many or too few tabs. Too few tabs result in a small conductive cross-sectional area, leading to increased overall resistance; too many tabs compress battery capacity. The specific percentage can be flexibly adjusted according to the battery model or charging / discharging requirements.

[0052] Example 5:

[0053] Because the current collector will have sharp burrs on its edges and surface after being flattened, please refer to the appendix for details on preventing these burrs from affecting battery performance. Figure 2 Both the positive electrode tab unit 5 and the negative electrode tab unit 6 are wrapped with insulating tape 8, and a portion of the positive electrode tab unit 5 and the negative electrode tab unit 6 extends out of the insulating tape 8.

[0054] Specifically, on the tab side of the battery, that is, the contact position between the current collector flattening area and the tab unit, insulating tape 8 is wrapped to cover the flattening area and part of the tab, forming a protective layer to prevent burrs from directly contacting the outer casing and causing a short circuit. At the same time, part of the tab unit extends out of the insulating tape 8 to connect and conduct electricity with the outer casing.

[0055] Example 6:

[0056] Reference Figure 1 The main body of the battery is a lithium-ion battery or a sodium-ion battery.

[0057] Specifically, the battery structure can be either a sodium-ion battery or a lithium-ion battery;

[0058] When using lithium-ion batteries, the binder is selected from lithium-ion-containing PVDF (hereinafter referred to as PVDF-Li) (content 0.5-2.5%), and the conductive agent is a composite material of Super P (content 1%-5%) and CNT (content 0.5-1.5%). It is combined with ternary oxide materials, lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and lithium manganese phosphate as the main active materials. The active slurry of the positive electrode is prepared by using N-methylpyrrolidone (NMP, purity ≥99.5%, water content <0.1%) as a solvent for coating. The active slurry of the negative electrode is made by using 90%-96% negative electrode active material, 2%-5% binder, and 1%-3% conductive agent in combination with solvent. The negative electrode active material uses natural graphite, artificial graphite, or a composite material of the two, and a small amount of silicon-based material may be added as an auxiliary material to improve performance; the binder uses a mixture of lithium-ion-containing sodium carboxymethyl cellulose (CMC) and styrene-butadiene rubber (SBR); the conductive agent uses a composite material of carbon black (SP) and graphite conductive agent (KS-6); the solvent uses deionized water (resistor ≥18MΩ·cm, free of impurity ions).

[0059] When using sodium-ion batteries, the positive electrode is selected from layered transition metal oxides, polyanionic compounds, and Prussian blue compounds as the positive electrode active material, combined with carbon nanotubes for conductivity, and sodium-modified polyvinylidene fluoride (PVDF-Na) as a binder, and NMP solvent is used to prepare the positive electrode active slurry; the negative electrode is selected from hard carbon or soft carbon as the negative electrode active material, and a conductive agent, binder and solvent are used to prepare the negative electrode active slurry, wherein: the binder is sodium-containing CMC, and the other proportions and materials are the same as those of lithium-ion batteries.

[0060] Working principle: Based on the traditional battery structure, this battery structure has several advantages. When high-rate discharge performance is required, the positive electrode is designed as a full-tab structure to shorten the electron conduction path, reduce the positive electrode resistance, and improve the discharge rate performance. The negative electrode is designed as a multi-tab structure to improve electrolyte filling efficiency. When fast charging performance is required, the negative electrode is designed as a full-tab structure to reduce the current density and achieve a higher charging rate. The positive electrode is designed as a multi-tab structure to improve the electrolyte filling efficiency. This allows the battery structure to improve performance for different needs and solves the problem of low electrolyte filling efficiency in traditional full-tab battery structures.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylindrical battery structure integrating all tabs and multiple tabs, comprising a battery body, characterized in that: The battery body includes a battery casing (1), a battery cell (2) disposed inside the battery casing (1), and a winding post (3). The battery casing (1) includes an outer shell (101) and caps (102) and a base (103) respectively disposed at both ends of the outer shell (101). The battery cell (2) includes a positive electrode plate (21), a separator (22), and a negative electrode plate (23). The positive electrode plate (21), the separator (22), and the negative electrode plate (23) are stacked and wound around the winding post (3) to form the battery cell (2). One end of the battery cell (2) is the positive electrode and the other end is the negative electrode. The cap (102) is disposed outside the positive electrode, and the base (103) is disposed outside the negative electrode. When the battery is designed for high-rate discharge, the positive electrode adopts a full-tab design and the negative electrode adopts a multi-tab design. When the battery focuses on fast charging, the negative electrode adopts an all-tab design, and the positive electrode adopts a multi-tab design.

2. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 1, characterized in that: The positive electrode (21) includes a positive active material sheet (211) and a positive coating layer (212) coated on its surface. The negative electrode (23) includes a negative active material sheet (231) and a negative coating layer (232) coated on its surface. The positive coating layer (212) and the negative coating layer (232) are disposed on the positive or negative electrode of the battery. The coating method is multiple coating or single coating. The thickness of the positive coating layer (212) and the negative coating layer (232) is 1-30 μm.

3. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 2, characterized in that: The positive electrode tab is designed as follows: one side of the positive electrode active material sheet (211) is provided with an uncoated positive electrode flattening area (213), the outer wall of the positive electrode flattening area (213) is fixed with an aluminum disk (4) by welding, the outer wall of the aluminum disk (4) is provided with a positive electrode tab unit (5), the positive electrode tab unit (5) is welded to the inner wall of the cap (102), and the aluminum disk (4) covers 85-95% of the total area of ​​the positive electrode flattening area (213); The negative electrode is designed with multiple negative electrode tabs: multiple negative electrode tab units (6) are provided along one edge of the negative electrode active material sheet (231), and the negative electrode tab units (6) are located inside the base (103).

4. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 2, characterized in that: The negative electrode tab is designed as follows: one side of the negative electrode active material sheet (231) is provided with an uncoated negative electrode flattening area (233), the outer wall of the negative electrode flattening area (233) is fixed with a nickel disk (7) by welding, the nickel disk (7) is welded to the inner wall of the base (103), and the nickel disk (7) covers 85-95% of the total area of ​​the negative electrode flattening area (233); The positive electrode is designed with multiple positive electrode tabs: multiple positive electrode tab units (5) are provided along one edge of the positive electrode active material sheet (211), and the positive electrode tab units (5) are located inside the cap (102).

5. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 3, characterized in that: The width of the positive electrode flattening area (213) is 1-35mm, the width of the positive electrode tab unit (5) is 1-100mm and the thickness is 0.01-10mm, the width of the negative electrode tab unit (6) is 1-100mm and the thickness is 0.01-10mm, the spacing between adjacent negative electrode tab units (6) is 2-10mm, the total area of ​​the negative electrode tab unit (6) accounts for 5-40% of the edge area of ​​the negative electrode active material sheet (231), the material of the positive electrode tab unit (5) is aluminum or aluminum alloy, and the material of the negative electrode tab unit (6) is nickel, copper or nickel alloy.

6. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 4, characterized in that: The width of the negative electrode flattening area (233) is 1-35mm, the distance between adjacent positive electrode tab units (5) is 2-10mm, and the total area of ​​the positive electrode tab units (5) accounts for 5-40% of the edge area of ​​the positive electrode active material sheet (211).

7. A cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 3 or 4, characterized in that: Both the positive electrode tab unit (5) and the negative electrode tab unit (6) are wrapped with insulating tape (8), and a portion of the positive electrode tab unit (5) and the negative electrode tab unit (6) extends out of the insulating tape (8).

8. The cylindrical battery structure integrating multiple tabs and cylindrical tabs according to claim 1, characterized in that: The battery body is a lithium-ion battery or a sodium-ion battery.

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