Lithium ion battery structure

Abstract

The present invention relates to the technical field of new energy power batteries, and relates to a lithium ion battery structure. A roll core (8) are located inside a case (1); a positive electrode cover plate (2), a positive electrode transition piece (4), and a positive electrode adapter (6) are provided on one end of the roll core (8) and the case (1), and a negative electrode cover plate (3), a negative electrode transition piece (5), a negative electrode adapter (7), and an insulating fixing ring (9) are provided on the other end of the roll core (8) and the case (1); and an insulating block plate (10) is arranged between the roll core (8) in the case (1) and the inner wall of the case (1). The lithium ion battery structure of the present invention has simple structure. By means of the arrangement of the structure and the setting of parameters, the sealing and insulation performances are improved, the matching of the battery in a corresponding vehicle is met, and the use requirement is met.

Description

A lithium-ion battery structure Technical Field

[0001] The present invention belongs to the technical field of new energy power batteries, and more specifically, relates to a lithium-ion battery structure. Background Art

[0002] The prior art has a technology named "Rechargeable lithium-ion power battery and its manufacturing method" with publication number "CN1444305A". The structure of this technology is as follows: each single cell is composed of a cover plate, a negative electrode column, a safety valve, a positive electrode column, an electrolyte, and a shell. The positive electrode column is connected to the positive electrode, and the negative electrode column is connected to the negative electrode. The positive electrode is made of aluminum foil of a certain thickness, and the positive electrode active material is evenly coated on both sides. The negative electrode is made of copper foil of a certain thickness, and the negative electrode active material is evenly coated on both sides. Material; it is characterized in that: the internal system consists of one or more pairs of positive and negative electrode sheet groups, namely the positive electrode, the negative electrode and the separator together constitute an electrode assembly with a multi-layer structure, and the positive and negative electrode sheets are placed in sequence and neatly; the positive or negative electrode sheet is in the form of a rectangular sheet with a large-leaf single-pole ear or a large-leaf multi-pole ear, and the current is conducted to the pole through the collecting clamp; the positive electrode has one or more poles, and the negative electrode has one or more poles, the number of positive and negative poles can be equal or different, and the diameter of the poles can be equal or different.

[0003] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to address the deficiencies of the existing technology, to provide a lithium-ion battery structure with a simple structure, which improves the sealing and insulation performance through structural settings and parameter settings, satisfies the matching of the battery in the corresponding vehicle, and meets the usage requirements.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The present invention discloses a lithium-ion battery structure, comprising an outer shell, a positive electrode cover plate, a negative electrode cover plate, a positive electrode transition piece, a negative electrode transition piece, a positive electrode adapter, a negative electrode adapter, a winding core, an insulating fixing ring, and an insulating baffle. The winding core is located inside the outer shell, and the positive electrode cover plate, the positive electrode transition piece, and the positive electrode adapter are arranged at one end of the winding core and the outer shell, and the negative electrode cover plate, the negative electrode transition piece, the negative electrode adapter, and the insulating fixing ring are arranged at the other end of the winding core and the outer shell. An insulating baffle is arranged between the winding core inside the outer shell and the inner wall of the outer shell.

[0007] In one embodiment, the housing structure is configured such that: 80 mm ≤ housing length L ≤ 1200 mm, 10 mm ≤ housing width H ≤ 500 mm, and 10 mm ≤ housing height D ≤ 150 mm. The housing structure also has: 0.4 mm ≤ housing first side thickness T1 ≤ 2.5 mm, 0.4 mm ≤ housing second side thickness T2 ≤ 2.5 mm, 0.4 mm ≤ housing third side thickness T3 ≤ 2.5 mm, and 0.4 mm ≤ housing fourth side thickness T4 ≤ 2.5 mm; and the hardness is HV40 or higher.

[0008] In one embodiment, the positive electrode cover plate includes a positive electrode column, the positive electrode column has a diameter ranging from 10 mm to 100 mm, and a height ranging from 3 mm to 20 mm.

[0009] In one embodiment, the negative electrode cover plate includes a negative electrode pole, the diameter of the negative electrode pole ranges from 10 mm to 100 mm, and the height of the negative electrode pole ranges from 3 mm to 20 mm; when the negative electrode stamping cover plate structure is set: 20 mm ≤ negative electrode stamping cover plate length L3 ≤ 500 mm, 10 mm ≤ negative electrode stamping cover plate width H3 ≤ 200 mm, 0.5 mm ≤ negative electrode stamping cover plate thickness D3 ≤ 3 mm.

[0010] In one embodiment, the length L2.1 of the positive electrode square of the positive electrode is equal to the length L311 of the negative electrode square of the negative electrode, and the ratio of the length L2.1 of the positive electrode square to the height H2.1 of the positive electrode square is: 1≤the ratio of the length L2.1 to the height H2.1≤10; the ratio of the length L311 of the negative electrode square to the height H311 of the negative electrode square is: 1≤the ratio of the length L311 to the height H311≤10.

[0011] In one embodiment, the positive electrode cover plate includes a positive electrode stamping cover plate, and when the positive electrode stamping cover plate structure is set: 20mm≤positive electrode stamping cover plate length L2≤500mm, 10mm≤positive electrode stamping cover plate width H2≤200mm, 0.5mm≤positive electrode stamping cover plate thickness D2≤3mm.

[0012] When the positive electrode adapter structure is set: 20mm≤positive electrode adapter length L6≤200mm, 5mm≤positive electrode adapter height H6≤120mm, 0.5mm≤positive electrode adapter width W6≤25mm, 0.5mm≤positive electrode adapter thickness D6≤5mm.

[0013] In one embodiment, the negative electrode insulation overmolding of the negative electrode cover plate adopts plastic injection molding to insulate and wrap the negative electrode welding ring and the negative electrode post.

[0014] In one embodiment, when the negative electrode adapter structure is set: 20mm≤negative electrode adapter length L7≤200mm, 5mm≤negative electrode adapter height H7≤120mm, 0.5mm≤negative electrode adapter width W7≤25mm, 0.5mm≤negative electrode adapter thickness D7≤5mm.

[0015] In one embodiment, the negative electrode cover plate insulation injection molding of the negative electrode cover plate is made of plastic with good insulation and corrosion resistance, and the negative electrode cover plate insulation injection molding is connected to the negative electrode stamping cover plate by welding or injection molding.

[0016] In one embodiment, the number of the cores is 1 to 4, and the dimensions of the cores are: 50 mm ≤ core length L ≤ 1000 mm, 50 mm ≤ core width W ≤ 500 mm, 10 mm ≤ core thickness D ≤ 50 mm, and multiple cores are connected in parallel, and the cores, transition pieces, and cover plates are connected by welding.

[0017] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0018] The lithium-ion battery structure described in the present invention is constructed by separately manufacturing the outer shell, positive electrode cover plate, negative electrode cover plate, positive electrode transition piece, negative electrode transition piece, positive electrode adapter, negative electrode adapter, winding core, insulating fixing ring, and insulating baffle during structural configuration, and then assembling the above components. The winding core is located inside the outer shell, with the positive electrode cover plate, positive electrode transition piece, and positive electrode adapter provided at one end of the winding core and the outer shell, and the negative electrode cover plate, negative electrode transition piece, negative electrode adapter, and insulating fixing ring provided at the other end of the winding core and the outer shell. An insulating baffle is provided between the winding core inside the outer shell and the inner wall of the outer shell. The insulating fixing ring and insulating baffle reliably achieve the insulation performance of the battery, the positive electrode components are reliably connected to the outer shell and winding core, and the negative electrode components are reliably connected to the outer shell and winding core, thereby improving the sealing performance. The battery formed by these components forms an integral structure, and the battery can be reliably used in relevant power vehicles to meet the requirements of use. The parameters of the battery-related components are adjusted within a set range to improve the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] FIG1 is a schematic structural diagram of a housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0021] FIG2 is a schematic side view of a housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0022] FIG3 is a schematic structural diagram of the negative electrode cover portion of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0023] FIG4 is a schematic structural diagram of the positive electrode cover portion of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0024] FIG5 is a schematic structural diagram of a housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0025] FIG6 is a schematic structural diagram of a positive electrode column of a housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0026] FIG7 is a schematic diagram of the structure of the negative electrode column of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0027] FIG8 is a schematic structural diagram of an adapter of a housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0028] FIG9 is a schematic diagram of another structural form of the negative electrode cover portion of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0029] FIG10 is a schematic diagram of another structural form of the positive electrode cover portion of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0030] FIG11 is a schematic diagram of another structural form of the housing of a lithium-ion battery structure in one or more embodiments of the present invention;

[0031] FIG12 is a schematic diagram of another structural form of the negative electrode post of the housing of the lithium-ion battery structure in one or more embodiments of the present invention.

[0032] In the figure: 1. Shell; 2. Positive cover; 2.1. Positive pole; 2.2. Positive stamped cover; 3. Negative cover; 3.1. Negative stamped cover; 3.2. Negative pole; 3.3. Negative insulation overmolding; 3.4 Negative welding ring; 3.5. Sealing ring; 3.6. Negative cover insulation injection; 3.7. Explosion-proof pressure relief valve; 3.8. Pressure relief valve; 3.9. Protective film; 4. Positive transition piece; 5. Negative transition piece; 6. Positive adapter; 7. Negative adapter; 8. Winding core; 9. Insulation fixing ring; 10. Insulation baffle; 11. Square positive pole; 12. Square negative pole. DETAILED DESCRIPTION

[0033] The following describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.

[0034] Example 1

[0035] As shown in Figures 1-12, the present invention provides a lithium-ion battery structure, comprising a housing 1, a positive electrode cover plate 2, a negative electrode cover plate 3, a positive electrode transition piece 4, a negative electrode transition piece 5, a positive electrode adapter 6, a negative electrode adapter 7, a winding core 8, an insulating retaining ring 9, and an insulating baffle 10. The winding core 8 is located within the housing 1. The positive electrode cover plate 2, positive electrode transition piece 4, and positive electrode adapter 6 are disposed at one end of the winding core 8 and the housing 1. The negative electrode cover plate 3, negative electrode transition piece 5, negative electrode adapter 7, and insulating retaining ring 9 are disposed at the other end of the winding core 8 and the housing 1. An insulating baffle 10 is disposed between the winding core 8 and the inner wall of the housing 1. The above structure addresses the shortcomings of the prior art and provides an improved technical solution. During structural setup, the outer shell 1, positive electrode cover plate 2, negative electrode cover plate 3, positive electrode transition piece 4, negative electrode transition piece 5, positive electrode adapter 6, negative electrode adapter 7, winding core 8, insulating fixing ring 9, and insulating baffle 10 are separately manufactured and then assembled. The winding core 8 is located inside the outer shell 1. The positive electrode cover plate 2, positive electrode transition piece 4, and positive electrode adapter 6 are arranged at one end of the winding core 8 and the outer shell 1. The negative electrode cover plate 3, negative electrode transition piece 5, negative electrode adapter 7, and insulating fixing ring 9 are arranged at the other end of the winding core 8 and the outer shell 1. An insulating baffle 10 is placed between the winding core 8 inside the outer shell 1 and the inner wall of the outer shell 1. In this way, the insulating fixing ring 9 and insulating baffle 10 reliably achieve the insulation performance of the battery, while the positive electrode components are reliably connected to the outer shell 1 and winding core 8, and the negative electrode components are reliably connected to the outer shell 1 and winding core 8, improving the sealing performance. In this way, the various components form a battery with an integrated structure, which can be reliably used in relevant power vehicles and meet usage requirements. The parameters of battery-related components are adjusted within a set range to improve the scope of application. The lithium-ion battery structure of the present invention is simple in structure. Through structural setting and parameter setting, the sealing and insulation performance are improved, and the battery is matched with the corresponding vehicle and meets the use requirements.

[0036] When configuring the outer shell 1, the following requirements apply: 80mm ≤ outer shell length L ≤ 1200mm, 10mm ≤ outer shell width H ≤ 500mm, and 10mm ≤ outer shell height D ≤ 150mm. Furthermore, the following requirements apply: 0.4mm ≤ outer shell first side thickness T1 ≤ 2.5mm, 0.4mm ≤ outer shell second side thickness T2 ≤ 2.5mm, 0.4mm ≤ outer shell third side thickness T3 ≤ 2.5mm, and 0.4mm ≤ outer shell fourth side thickness T4 ≤ 2.5mm; the hardness reaches HV40 or higher. This structure allows the outer shell 1 to be adjusted within a set range, effectively increasing its adaptability. Furthermore, the dimensions of the positive cover plate 2, negative cover plate 3, positive transition piece 4, negative transition piece 5, positive adapter 6, negative adapter 7, winding core 8, insulating retaining ring 9, and insulating baffle 10 are adjusted accordingly for different sizes of outer shell 1, resulting in a reliable assembly structure that meets the required battery requirements.

[0037] The positive electrode cover 2 includes a positive electrode column 2.1, the diameter of the positive electrode column 2.1 ranges from 10mm to 100mm, and the height of the positive electrode column 2.1 ranges from 3mm to 20mm. The above structure sets the parameters of the positive electrode column 2.1, and the positive electrode column 2.1 can be adjusted within the set range.

[0038] The negative electrode cover plate 3 includes a negative electrode post 3.2. The diameter of the negative electrode post 3.2 ranges from 10mm to 100mm, and the height of the negative electrode post 3.2 ranges from 3mm to 20mm. When the negative electrode stamped cover plate 3.1 is configured, the following conditions are met: 20mm≤negative electrode stamped cover plate length L3≤500mm, 10mm≤negative electrode stamped cover plate width H3≤200mm, and 0.5mm≤negative electrode stamped cover plate thickness D3≤3mm. The above structure sets the parameters of the negative electrode post 3.2, allowing the negative electrode post 3.2 to be adjusted within the set range, thereby effectively increasing the adaptability.

[0039] The length L2.1 of the positive electrode square 11 of the positive electrode 2.1 is equal to the length L311 of the negative electrode square 12 of the negative electrode 3.2. The ratio of the length L2.1 of the positive electrode square 11 to the height H2.1 of the positive electrode square 11 is: 1≤the ratio of the length L2.1 to the height H2.1≤10; and the ratio of the length L311 of the negative electrode square 12 to the height H311 of the negative electrode square 12 is: 1≤the ratio of the length L311 to the height H311≤10. The above structure sets the parameters of the positive electrode 2.1, allowing the positive electrode 2.1 to be adjusted within a set range, thereby effectively increasing the adaptability.

[0040] The positive electrode cover plate 2 includes a positive electrode stamping cover plate 2.2. When the positive electrode stamping cover plate 2.2 is structurally set: 20mm≤positive electrode stamping cover plate length L2≤500mm, 10mm≤positive electrode stamping cover plate width H2≤200mm, 0.5mm≤positive electrode stamping cover plate thickness D2≤3mm; when the positive electrode adapter 6 is structurally set: 20mm≤positive electrode adapter length L6≤200mm, 5mm≤positive electrode adapter height H6≤120mm, 0.5mm≤positive electrode adapter width W6≤25mm, 0.5mm≤positive electrode adapter thickness D6≤5mm. The above structure sets the parameters of the positive electrode stamping cover plate 2.2, and the positive electrode stamping cover plate 2.2 can be adjusted within the set range. In the present invention, L represents length, H represents width, W represents height, and D represents thickness.

[0041] The negative electrode insulation coating 3.3 of the negative electrode cover plate 3 uses plastic injection molding to insulate and wrap the negative electrode welding ring 3.4 and the negative electrode pole 3.2. In the above structure, the negative electrode insulation coating 3.3 uses plastic injection molding to insulate and wrap the negative electrode welding ring 3.4 and the negative electrode pole 3.2, thereby improving the insulation effect of the cover plate.

[0042] Furthermore, it should be noted that the present invention provides a sealing ring 3.5 between the negative electrode stamping cover plate 3.1 and the negative electrode welding ring 3.4 to ensure the sealing performance of the negative electrode cover plate 3. Furthermore, the negative electrode cover plate 3 of the present invention is also provided with an explosion-proof pressure relief valve 3.7, which can be used to relieve pressure in the event of thermal runaway of the lithium-ion battery structure, thereby ensuring the safety of the lithium-ion battery structure. A protective film 3.9 is also provided on the explosion-proof pressure relief valve 3.7 to prevent external impurities from affecting the normal operation of the explosion-proof pressure relief valve 3.7, improve the corrosion resistance of the explosion-proof pressure relief valve 3.7, and further enhance the safety factor of the lithium-ion battery structure.

[0043] The negative electrode adapter 7 is configured to have the following parameters: 20 mm ≤ negative electrode adapter length L7 ≤ 200 mm, 5 mm ≤ negative electrode adapter height H7 ≤ 120 mm, 0.5 mm ≤ negative electrode adapter width W7 ≤ 25 mm, and 0.5 mm ≤ negative electrode adapter thickness D7 ≤ 5 mm. The above configuration sets the parameters of the negative electrode adapter 7, which can be adjusted within the set range to improve its adaptability.

[0044] The negative electrode cover plate 3's insulating injection molding 3.6 is made of a plastic with excellent insulation and corrosion resistance. This is connected to the negative electrode stamped cover plate 3.1 by welding or injection molding. This structure, in which the negative electrode cover plate insulating injection molding 3.6 is connected to the negative electrode stamped cover plate 3.1 by welding or injection molding, effectively improves insulation and enhances overall performance.

[0045] The number of winding cores 8 ranges from 1 to 4, and the dimensions of the winding core 8 are: 50mm≤winding core length L≤1000mm, 50mm≤winding core width W≤500mm, 10mm≤winding core thickness D≤50mm. Multiple winding cores 8 are connected in parallel, and the winding cores 8 and transition plates and cover plates (specifically the positive cover plate 2, the positive transition plate 4, the negative cover plate 3, and the negative transition plate 5) are connected by welding.

[0046] When the lithium-ion battery structure of the present invention is configured, the internal winding core 8 of the battery adopts a full-tab winding method. The full-tab winding method can make the internal force of the battery more uniform. The large-area tab method can avoid vibration damage when subjected to large impact forces, and the large-area tab can effectively increase the flow area. The large-area flow can improve its heat dissipation performance and overcurrent energy, making the battery have extremely high flow capacity. The parallel connection of multiple cores 8 can make the battery have a smaller internal resistance, further improving the performance and life of the battery.

[0047] The lithium-ion battery structure of the present invention is constructed by separately manufacturing the outer shell 1, the positive electrode cover plate 2, the negative electrode cover plate 3, the positive electrode transition piece 4, the negative electrode transition piece 5, the positive electrode adapter 6, the negative electrode adapter 7, the winding core 8, the insulating fixing ring 9, and the insulating baffle 10, and then assembling the above components. The winding core 8 is located inside the outer shell 1. The positive electrode cover plate 2, the positive electrode transition piece 4, and the positive electrode adapter 6 are arranged at one end of the winding core 8 and the outer shell 1. The negative electrode cover plate 3, the negative electrode transition piece 5, the negative electrode adapter 7, and the insulating fixing ring 9 are arranged at the other end of the winding core 8 and the outer shell 1. The insulating baffle 10 is arranged between the winding core 8 inside the outer shell 1 and the inner wall of the outer shell 1. In this way, the insulating fixing ring 9 and the insulating baffle 10 reliably achieve the insulation performance of the battery, and the various components of the positive electrode are connected to each other and reliably connected to the outer shell 1 and the winding core 8. The various components of the negative electrode are connected to each other and reliably connected to the outer shell 1 and the winding core 8, thereby improving the sealing performance. In this way, the battery, with all components forming an integrated structure, can be reliably used in relevant power vehicles to meet usage requirements. The parameters of the battery-related components can be adjusted within a set range to increase the scope of application.

[0048] Example 2

[0049] The lithium-ion battery structure of this embodiment includes a shell 1, a positive electrode cover plate 2, a negative electrode cover plate 3, a positive electrode transition plate 4, a negative electrode transition plate 5, a positive electrode adapter 6, a negative electrode adapter 7, a winding core 8, an insulating fixing ring 9, and an insulating baffle 10. Among them, the positive electrode cover plate 2 includes a positive electrode column 2.1, and the negative electrode cover plate 3 includes a negative electrode column 3.2. The cross-sections of the positive electrode column 2.1 and the negative electrode column 3.2 are both rectangular.

[0050] The length L2.1 of the positive electrode square 11 of the positive electrode 2.1 is equal to the length L311 of the negative electrode square 12 of the negative electrode 3.2. The ratio of the length L2.1 of the positive electrode square 11 to the height H2.1 of the positive electrode square 11 is: 1≤the ratio of the length L2.1 to the height H2.1≤10; and the ratio of the length L311 of the negative electrode square 12 to the height H311 of the negative electrode square 12 is: 1≤the ratio of the length L311 to the height H311≤10. The above structure sets the parameters of the positive electrode 2.1, allowing the positive electrode 2.1 to be adjusted within a set range, thereby effectively increasing the adaptability.

[0051] The negative electrode cover plate 3 of the present invention is provided with a pressure relief valve 3.8, which can be used to relieve pressure when the lithium-ion battery structure experiences thermal runaway. Alternatively, an explosion-proof pressure relief valve 3.7 can be provided in the same structural form as in the first embodiment to ensure the safety of the lithium-ion battery structure. In actual application, an appropriate pressure relief element can be selected according to the specific structure and model of the lithium-ion battery to meet different operating conditions, thereby ensuring the safety of the lithium-ion battery structure while improving the flexibility and adaptability of the lithium-ion battery structure.

[0052] The other structures of the lithium-ion battery structure of this embodiment are the same as those of the first embodiment and will not be described again here.

[0053] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A lithium-ion battery structure, characterized in that: The invention comprises a shell (1), a positive electrode cover plate (2), a negative electrode cover plate (3), a positive electrode transition sheet (4), a negative electrode transition sheet (5), a positive electrode adapter (6), a negative electrode adapter (7), a winding core (8), an insulating fixing ring (9) and an insulating baffle (10), wherein the winding core (8) is located inside the shell (1), the positive electrode cover plate (2), the positive electrode transition sheet (4) and the positive electrode adapter (6) are arranged at one end of the winding core (8) and the shell (1), the negative electrode cover plate (3), the negative electrode transition sheet (5), the negative electrode adapter (7) and the insulating fixing ring (9) are arranged at the other end of the winding core (8) and the shell (1), and the insulating baffle (10) is arranged between the winding core (8) inside the shell (1) and the inner wall of the shell (1).

2. The lithium-ion battery structure according to claim 1, characterized in that: When the shell (1) is structurally arranged: 80 mm ≤ the length L of the shell (1) ≤ 1200 mm, 10 mm ≤ the width H of the shell (1) ≤ 500 mm, 10 mm ≤ the height D of the shell (1) ≤ 150 mm; When the shell (1) is structurally configured: 0.4 mm ≤ the thickness T1 of the first side of the shell (1) ≤ 2.5 mm, 0.4 mm ≤ the thickness T2 of the second side of the shell (1) ≤ 2.5 mm, 0.4 mm ≤ the thickness T3 of the third side of the shell (1) ≤ 2.5 mm, 0.4 mm ≤ the thickness T4 of the fourth side of the shell (1) ≤ 2.5 mm; the hardness reaches above HV40.

3. The lithium-ion battery structure according to claim 1 or 2, characterized in that: The positive electrode cover plate (2) comprises a positive electrode column (2.1), the diameter of the positive electrode column (2.1) is in the range of 10 mm to 100 mm, and the height of the positive electrode column (2.1) is in the range of 3 mm to 20 mm.

4. The lithium-ion battery structure according to claim 3, characterized in that: The negative electrode cover plate (3) comprises a negative electrode pole (3.2), the diameter of the negative electrode pole (3.2) ranges from 10 mm to 100 mm, and the height of the negative electrode pole (3.2) ranges from 3 mm to 20 mm; when the negative electrode stamping cover plate (3.1) is structurally arranged: 20 mm ≤ the length L3 of the negative electrode stamping cover plate (3.1) ≤ 500 mm, 10 mm ≤ the width H3 of the negative electrode stamping cover plate (3.1) ≤ 200 mm, and 0.5 mm ≤ the thickness D3 of the negative electrode stamping cover plate (3.1) ≤ 3 mm.

5. The lithium-ion battery structure according to claim 4, characterized in that: The length L2.1 of the positive pole square (11) of the positive pole (2.1) is equal to the length L311 of the negative pole square (12) of the negative pole (3.2); the ratio of the length L2.1 of the positive pole square (11) to the height H2.1 of the positive pole square (11) is: 1≤ratio of length L2.1 to height H2.1≤10; the ratio of the length L311 of the negative pole square (12) to the height H311 of the negative pole square (12) is: 1≤ratio of length L311 to H311≤10.

6. The lithium-ion battery structure according to claim 4, characterized in that: The positive electrode cover plate (2) comprises a positive electrode stamping cover plate (2.2). When the positive electrode stamping cover plate (2.2) is structurally arranged, the following conditions are met: 20 mm ≤ the length L2 of the positive electrode stamping cover plate (2.2) ≤ 500 mm, 10 mm ≤ the width H2 of the positive electrode stamping cover plate (2.2) ≤ 200 mm, and 0.5 mm ≤ the thickness D2 of the positive electrode stamping cover plate (2.2) ≤ 3 mm; when the positive electrode adapter (6) is structurally arranged, the following conditions are met: 20 mm ≤ the length L6 of the positive electrode adapter (6) ≤ 200 mm, 5 mm ≤ the height H6 of the positive electrode adapter (6) ≤ 120 mm, 0.5 mm ≤ the width W6 of the positive electrode adapter (6) ≤ 25 mm, and 0.5 mm ≤ the thickness D6 of the positive electrode adapter (6) ≤ 5 mm.

7. The lithium-ion battery structure according to claim 5, characterized in that: The negative electrode insulation rubber injection molding (3.3) of the negative electrode cover plate (3) uses plastic injection molding to insulate and wrap the negative electrode welding ring (3.4) and the negative electrode pole (3.2).

8. The lithium-ion battery structure according to claim 1 or 2, characterized in that: When the negative electrode adapter (7) structure is set: 20mm≤the length L7 of the negative electrode adapter (7)≤200mm, 5mm≤the height H7 of the negative electrode adapter (7)≤120mm, 0.5mm≤the width W7 of the negative electrode adapter (7)≤25mm, 0.5mm≤the thickness D7 of the negative electrode adapter (7)≤5mm.

9. The lithium-ion battery structure according to claim 5, characterized in that: The negative electrode cover plate insulation injection molding (3.6) of the negative electrode cover plate (3) is made of plastic with good insulation and corrosion resistance, and the negative electrode cover plate insulation injection molding (3.6) is connected to the negative electrode stamping cover plate (3.1) by welding or injection molding.

10. The lithium-ion battery structure according to claim 1 or 2, characterized in that: The number of the winding cores (8) ranges from 1 to 4, and the dimensions of the winding cores (8) are: 50 mm ≤ the length L of the winding core (8) ≤ 1000 mm, 50 mm ≤ the width W of the winding core (8) ≤ 500 mm, 10 mm ≤ the thickness D of the winding core (8) ≤ 50 mm. The plurality of winding cores (8) are connected in parallel, and the winding cores (8) are connected to the transition piece and the cover plate by welding.

Images