Lithium manganese dioxide battery

Abstract

The utility model relates to the field of batteries, and particularly discloses a lithium manganese dioxide battery which comprises a winding type battery cell, and the winding type battery cell comprises a manganese dioxide positive plate, a negative plate and a diaphragm; the manganese dioxide positive plate is wound, the diaphragm wraps the outer side of the manganese dioxide positive plate, and the negative belt wraps the outer side of the diaphragm; the negative electrode strip comprises a negative electrode lithium strip and a copper strip, and the copper strip is pressed on the negative electrode lithium strip. The copper strip is pressed on the negative electrode lithium strip to form the negative electrode strip, and the copper strip cannot be broken when the battery vibrates, so that the functions of collecting and conducting electrons can be maintained, the negative electrode strip can provide enough energy, a unique winding form is combined, the thickness of the negative electrode lithium strip is increased, the structural strength of the negative electrode lithium strip is improved, and the service life of the battery is prolonged when the battery vibrates. Therefore, the anti-seismic property of the winding type battery cell is improved, and the anti-seismic property of the lithium-manganese dioxide battery is further improved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a lithium manganese dioxide battery. Background Technology

[0002] Lithium-manganese dioxide (MnO) batteries are widely used in various electronic devices due to their high energy density, low self-discharge rate, long lifespan, and safety. Existing MnO batteries using wound cells include a manganese dioxide positive electrode and a lithium negative electrode. The positive electrode, separator, and negative electrode are wound simultaneously. However, the lithium negative electrode has poor shock resistance. Therefore, existing MnO batteries, especially in low-to-medium current discharge scenarios, suffer from insufficient shock resistance. Utility Model Content

[0003] This invention provides a lithium manganese dioxide battery, which aims to solve the problem of insufficient shock resistance of existing lithium manganese dioxide batteries.

[0004] This utility model discloses a lithium manganese dioxide battery, including a wound cell. The wound cell includes a manganese dioxide positive electrode sheet, a negative electrode strip, and a separator. The manganese dioxide positive electrode sheet is wound and arranged, the separator is wrapped around the outside of the manganese dioxide positive electrode sheet, and the negative electrode strip is wrapped around the outside of the separator. The negative electrode strip includes a negative lithium strip and a copper strip, and the copper strip is pressed onto the negative lithium strip.

[0005] In some embodiments, the thickness of the negative electrode lithium strip is 1 mm.

[0006] In some embodiments, the particle size D50 of the manganese dioxide particles in the manganese dioxide positive electrode sheet is 8 to 10 micrometers.

[0007] In some embodiments, the particle size D50 of the manganese dioxide positive electrode is 9 micrometers.

[0008] In some embodiments, the copper strip extends along the length direction of the negative lithium strip.

[0009] In some embodiments, the center line of the major axis of the copper strip and the center line of the major axis of the negative lithium strip are aligned on the same straight line.

[0010] In some embodiments, the short axis centerline of the copper strip and the short axis centerline of the negative lithium strip are aligned on the same straight line.

[0011] In some embodiments, the lithium manganese dioxide battery further includes a metal casing, an electrolyte, and a sealing cap assembly; the metal casing is used to house the wound cell and the electrolyte, and the sealing cap assembly is welded to the metal casing.

[0012] In some embodiments, the diaphragm is a three-layer adhesive structure of PP+PE+PP.

[0013] The beneficial effects of this utility model are as follows: This utility model discloses a lithium manganese dioxide battery, comprising a wound cell, a manganese dioxide positive electrode sheet, a negative electrode strip, and a separator. The manganese dioxide positive electrode sheet is wound, the separator is wrapped around the outside of the manganese dioxide positive electrode sheet, and the negative electrode strip is wrapped around the outside of the separator. The negative electrode strip comprises a negative lithium strip and a copper strip, with the copper strip pressed onto the negative lithium strip. By pressing a copper strip onto the negative lithium strip to form the negative electrode strip, the copper strip will not break when the battery vibrates, thus maintaining its function of collecting and conducting electrons, ensuring that the negative electrode strip can provide sufficient energy. Combined with the unique winding method, the thickness of the negative lithium strip is increased, improving its structural strength. The negative lithium strip will also not break when the battery vibrates, thereby improving the shock resistance of the wound cell and thus improving the shock resistance of the lithium manganese dioxide battery. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A longitudinal cross-sectional view of a lithium manganese dioxide battery provided in an embodiment of this utility model;

[0016] Figure 2 A cross-sectional schematic diagram of a wound cell for a lithium manganese dioxide battery provided in an embodiment of this utility model;

[0017] Figure 3 A planar schematic diagram of the welding of the positive electrode tab to the manganese dioxide positive electrode sheet of the lithium manganese dioxide battery provided in an embodiment of the present utility model;

[0018] Figure 4 This is a plan view of the negative electrode of a lithium manganese dioxide battery with a welded negative electrode tab, provided in an embodiment of the present invention.

[0019] Reference numerals: 1. Manganese dioxide positive electrode sheet; 2. Negative electrode strip; 201. Negative lithium strip; 202. Copper strip; 3. Positive electrode tab; 4. Negative electrode tab; 5. Separator; 6. Metal shell; 7. Electrolyte; 8. Sealing cover assembly; 9. Steel ball; 10. Cover assembly post; 11. Cap; 12. Insulating washer; 13. First top insulating gasket; 14. Second top insulating gasket; 15. Bottom insulating gasket. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and, or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and, or collections thereof.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the terms "and" and "or" as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0025] like Figures 1 to 4 As shown, this utility model embodiment discloses a lithium manganese dioxide battery. Figure 1A longitudinal cross-sectional view of a lithium manganese dioxide battery provided in an embodiment of this utility model; Figure 2 A cross-sectional schematic diagram of a wound cell for a lithium manganese dioxide battery provided in an embodiment of this utility model; Figure 3 A planar schematic diagram of the welding of the positive electrode tab to the manganese dioxide positive electrode sheet of the lithium manganese dioxide battery provided in an embodiment of the present utility model;

[0026] Figure 4 This is a plan view of the negative electrode of a lithium manganese dioxide battery with a welded negative electrode tab, provided in an embodiment of the present invention.

[0027] See also Figures 1 to 4 This utility model discloses a lithium manganese dioxide battery, including a wound cell. The wound cell includes a manganese dioxide positive electrode 1, a negative electrode strip 2, and a separator 5. The manganese dioxide positive electrode 1 is wound, the separator 5 is wrapped around the outside of the manganese dioxide positive electrode 1, and the negative electrode strip 2 is wrapped around the outside of the separator 5. The negative electrode strip 2 includes a negative lithium strip 201 and a copper strip 202, and the copper strip 202 is pressed onto the negative lithium strip 201.

[0028] In this embodiment, the positive electrode of the battery includes a manganese dioxide positive electrode sheet 1, and the negative electrode includes a negative electrode strip 2. During battery discharge, the manganese dioxide on the manganese dioxide positive electrode sheet 1 accepts electrons from the external circuit and combines with lithium ions in the electrolyte 7 to form lithium manganese oxide as an oxidant. The stable crystal structure of lithium manganese oxide ensures smooth battery discharge. The negative electrode lithium strip 201 is made of lithium metal or a lithium alloy, such as Li-Al, Li-Sn, or Li-Pb. During battery discharge, lithium atoms on the negative electrode lithium strip 201 lose electrons and are oxidized to form lithium ions, releasing electrons to the external circuit to provide energy. The copper strip 202 acts as a current collector and conductive carrier, used to collect and conduct electrons. The separator 5 is located between the manganese dioxide positive electrode sheet 1 and the negative electrode strip 2, mainly serving to isolate the positive and negative electrodes and prevent short circuits.

[0029] On the one hand, the copper strip 202 has excellent ductility and shock resistance. When the battery vibrates, the copper strip 202 will not break, thus maintaining its function of collecting and conducting electrons, ensuring that the negative electrode 2 can provide sufficient energy. The discharge curve of the battery provided in this embodiment shows a stable voltage throughout the entire discharge cycle, with its effect particularly evident at the end of the discharge capacity. In contrast, existing lithium manganese dioxide batteries have poor shock resistance of the lithium negative electrode sheet, which is prone to breakage during battery vibration, leading to a rapid drop in voltage. On the other hand, in this embodiment, by pressing the copper strip 202 onto the negative lithium strip 201, the strength of the negative lithium strip 201 is also improved, enhancing its own shock resistance. The negative lithium strip 201 itself will not break during battery vibration. Therefore, the design of pressing the copper strip 202 onto the negative lithium strip 201 can effectively improve the shock resistance of the lithium manganese dioxide battery.

[0030] Furthermore, the winding method of the wound cell in this embodiment differs from that of traditional wound cells. Traditional wound cells simultaneously wind the positive electrode, separator, and negative electrode into a cylindrical shape. In this embodiment, the manganese dioxide positive electrode 1 is first wound separately into a cylinder, then the separator 5 is wrapped around the outside of the manganese dioxide positive electrode 1, and finally the negative electrode strip 2 is wrapped around the outside of the separator 5. The length of the negative electrode strip 2 is approximately equal to the outermost circumference of the wound manganese dioxide positive electrode 1. This unique winding method allows for an increase in the thickness of the negative electrode strip 2 without increasing the size of the battery casing. This is because, in traditional wound cells, due to simultaneous winding, the radius of the cell increases with each turn by the thickness of one layer of positive electrode, one layer of negative electrode, and one layer of separator. If a total of A turns are required, the radius of the cell is approximately A times the sum of the thicknesses of one layer of positive electrode, one layer of negative electrode, and one layer of separator. If the manganese dioxide positive electrode 1 of the wound cell in this embodiment is also wound A turns, the radius of the cell is only about A times the thickness of one layer of manganese dioxide positive electrode 1 plus the thickness of one layer of separator 5 and the thickness of one layer of negative electrode strip 2. Therefore, assuming that the wound cell of this embodiment has the same size as the conventional wound cell, the negative electrode strip 2 of this embodiment can be made thicker. Consequently, the negative lithium strip 201 can be made thicker, thereby improving the structural strength of the negative lithium strip 201 and improving its shock resistance.

[0031] In summary, this embodiment improves the shock resistance of the wound cell by pressing a copper strip 202 onto the negative electrode lithium strip 201 to form the negative electrode strip 2, and by combining it with a unique winding method. This enhances the shock resistance of the lithium manganese dioxide battery, enabling it to operate stably in harsh mechanical environments. Furthermore, this embodiment improves shock resistance without increasing battery size. The lithium manganese dioxide battery in this embodiment exhibits a stable voltage platform (especially in the later stages of battery discharge) and high discharge efficiency in low-to-medium current discharge scenarios, making it suitable for various low-power electronic devices or applications such as smoke detectors.

[0032] In one embodiment, the thickness of the negative electrode lithium strip 201 is 1 mm.

[0033] In this embodiment, when the negative electrode sheet is the same size as that of a conventional wound-type lithium manganese dioxide battery, it can only be 0.16mm thick. However, the thickness of the negative electrode lithium strip 201 in this embodiment is 1mm. By increasing the strength of the negative electrode lithium strip 201 and combining it with the copper strip 202, the shock resistance of the lithium manganese dioxide battery is significantly improved.

[0034] In one embodiment, the particle size D50 of the manganese dioxide particles in the manganese dioxide positive electrode 1 is 8 to 10 micrometers.

[0035] Particle size D50 refers to the particle size at which the cumulative particle size distribution percentage of a sample reaches 50%. Physically, it means that 50% of the particles are larger than D50, and 50% are smaller. In this embodiment, the particle size D50 of the manganese dioxide particles is controlled to the range of 8–10 micrometers, specifically 8, 8.5, 9, 9.5, or 10 micrometers. This effectively increases the active area of ​​the electrode reaction, resulting in a 5%–10% increase in battery capacity compared to traditional lithium manganese dioxide batteries.

[0036] The reason is that manganese dioxide particles with a particle size of 8-10 micrometers (D50) have a higher specific surface area (surface area per unit mass), providing more reaction sites and avoiding agglomeration or electrolyte penetration difficulties caused by excessively small particles. The disadvantages of a particle size D50 > 10 micrometers include a decreased specific surface area, reduced active area due to larger particles, insufficient reaction sites, and increased diffusion distance of lithium ions within the particles when they combine with lithium ions to form lithium manganese oxide, leading to increased polarization. The disadvantages of a particle size D50 < 8 micrometers include the tendency for excessively small particles to agglomerate, resulting in a lower actual active area. Therefore, controlling the particle size D50 of manganese dioxide particles to 8-10 micrometers can effectively increase the active area of ​​the electrode reaction and improve battery capacity.

[0037] In one embodiment, the copper strip 202 extends along the length direction of the negative electrode lithium strip 201.

[0038] Furthermore, the center line of the major axis of the copper strip 202 and the center line of the major axis of the negative electrode lithium strip 201 are aligned on the same straight line.

[0039] Furthermore, the short axis centerline of the copper strip 202 and the short axis centerline of the negative electrode lithium strip 201 are also set on the same straight line.

[0040] In this embodiment, after the copper strip 202 is pressed onto the negative lithium strip 201 along the length direction of the negative lithium strip 201, its length is the same as that of the negative lithium strip 201, so that after the cell is wound and formed, the copper strip 202 completely wraps around one circumference, so as to ensure that the negative lithium strip 201 can provide sufficient energy through its current collection function.

[0041] In one embodiment, the lithium manganese dioxide battery further includes a metal casing 6, an electrolyte 7, and a sealing cap assembly 8; the metal casing 6 is used to house the wound cell and the electrolyte 7, and the sealing cap assembly 8 is welded to the metal casing 6.

[0042] In this embodiment, the metal casing 6 can be made of nickel-plated steel, cylindrical in shape with an opening at the top. The wound battery cell, after being wound, can be placed into the metal casing 6 through this opening. A sealing cap assembly 8 is welded to the metal casing 6 to seal the opening. The sealing cap assembly 8 has an injection hole through which electrolyte 7 can be injected into the metal casing 6. The main function of the metal casing 6 and the sealing cap assembly 8 is to encapsulate the internal components of the battery, protecting the internal structure and materials of the battery and preventing external moisture, air, etc., from causing contamination and corrosion to the battery interior. It also prevents leakage of electrolyte 7 and other substances inside the battery. In addition, the metal casing 6 also serves as the negative electrode lead of the battery, providing conductivity and a physical connection for the battery's power output. The electrolyte 7 is the medium for lithium ion transport between the positive and negative electrodes, providing a transport channel for lithium ions and enabling the electrochemical reaction inside the battery to proceed smoothly. The lithium manganese dioxide battery also includes steel balls 9, which are used to seal the injection hole after electrolyte injection to prevent leakage of electrolyte 7.

[0043] In one embodiment, the wound battery cell further includes a positive electrode tab 3 and a negative electrode tab 4. One end of the positive electrode tab 3 is welded to the manganese dioxide positive electrode sheet 1, and the other end is welded to the cover assembly post 10. One end of the negative electrode tab 4 is welded to the negative electrode strip 2, and the other end is welded to the metal casing 6.

[0044] In this embodiment, the positive electrode tab 3 is made of stainless steel strip, and the negative electrode tab 4 is made of nickel strip. The function of the positive electrode tab 3 and the negative electrode tab 4 is to collect the current on the electrodes (positive and negative electrodes) and conduct / conduct it, realizing the electrical connection between the battery and the external circuit. The cover group terminal 10 passes through the sealing cover group 8, with one end located inside the sealing cover group 8 and the other end located outside the sealing cover group 8. The end of the positive electrode tab 3 away from the manganese dioxide positive electrode sheet 1 is welded to the end of the cover group terminal 10 located inside the sealing cover group 8. The lithium manganese dioxide battery also includes a cap 11, which is located on the outside of the sealing cover group 8. The inside of the cap 11 is welded to the end of the cover group terminal 10 located outside the sealing cover group 8. In this way, the cap 11 can serve as the positive electrode lead of the battery, used to connect to the external circuit and output the battery's electrical energy to external devices. The end of the negative electrode tab 4 away from the negative electrode strip 2 is welded to the inner wall of the metal casing 6, so that the metal casing 6 serves as the negative electrode lead of the battery.

[0045] Specifically, the manganese dioxide positive electrode 1 is a long rectangle. When the positive electrode tab 3 is welded to the manganese dioxide positive electrode 1, it is welded at a distance of 50 mm from one end of the manganese dioxide positive electrode 1. When winding, the winding starts from the end closest to the positive electrode tab 3. Thus, after winding, the positive electrode tab 3 is located in the middle of the cylindrical manganese dioxide positive electrode 1.

[0046] In one embodiment, the separator 5 is a three-layer adhesive structure of PP (polypropylene) + PE (polyethylene) + PP. As provided in the above embodiment, the separator 5 is disposed between the manganese dioxide positive electrode sheet 1 and the negative electrode strip 2. It is mainly used to isolate the positive and negative electrodes, preventing electrons from passing through and avoiding short circuits, while allowing lithium ions to pass through, thereby achieving ion conduction and maintaining normal battery operation while ensuring battery safety.

[0047] In one embodiment, the lithium manganese dioxide battery further includes an insulating gasket 12, a first top insulating gasket 13, a second top insulating gasket 14, and a bottom insulating gasket 15.

[0048] In this embodiment, the insulating gasket 12 is disposed on the outer end face of the sealing cover assembly 8 to isolate the cap 11 from the sealing cover assembly 8. Since the sealing cover assembly 8 is welded to the metal shell 6 around its perimeter, isolating the cap 11 from the sealing cover assembly 8 is equivalent to isolating the cap 11 from the metal shell 6, thereby preventing the cap 11 from contacting the metal shell 6 and short-circuiting. The first top insulating gasket 13 is disposed on the inner end face of the sealing cover assembly 8, and the first top insulating gasket 13 is in close contact with the perimeter of the cover assembly pole 10. The insulating gasket 12 is also in close contact with the perimeter of the cover assembly pole 10. An insulating element (not labeled in the figure) is also disposed at the overlapping position of the cover assembly pole 10 and the sealing cover assembly 8, thereby preventing the cover assembly pole 10 from contacting the sealing cover assembly 8 and short-circuiting. In addition, the first top insulating gasket 13 also prevents the positive electrode tab 3 from contacting the sealing cover assembly 8 and short-circuiting. The second top insulating pad 14 is disposed on the top of the wound manganese dioxide positive electrode sheet 1 and covers its entire top end face, thereby preventing the top of the manganese dioxide positive electrode sheet 1 from contacting the inner wall of the metal casing 6 and short-circuiting. The bottom insulating pad 15 is disposed on the bottom of the wound manganese dioxide positive electrode sheet 1, thereby preventing the bottom of the manganese dioxide positive electrode sheet from contacting the inner bottom wall of the metal casing 6 and short-circuiting.

[0049] This utility model embodiment also provides a method for preparing a battery cell, used to prepare the wound battery cell described in the above embodiment, comprising:

[0050] A manganese dioxide positive electrode sheet is provided, and the manganese dioxide positive electrode sheet is wound.

[0051] Before the manganese dioxide positive electrode sheet is wound to the end, the diaphragm is inserted into the inside of the manganese dioxide positive electrode sheet;

[0052] The separator and the remaining manganese dioxide positive electrode sheet are wound up;

[0053] A negative electrode lithium strip is provided, and a copper strip is pressed onto the negative electrode lithium strip to obtain a negative electrode strip;

[0054] The negative electrode strip is wrapped around the outside of the separator to obtain a wound battery cell.

[0055] In one embodiment, the manganese dioxide positive electrode sheet includes:

[0056] Manganese dioxide particles are ground to control their particle size D50 within the range of 8-10 micrometers; the ground manganese dioxide particles are mixed with conductive agent and binder and rolled onto an aluminum mesh; after drying and secondary rolling, manganese dioxide positive electrode sheet is obtained.

[0057] In one embodiment, before winding the manganese dioxide positive electrode sheet, the process includes: welding a positive electrode tab to the manganese dioxide positive electrode sheet at a distance of 50 mm from one end of the manganese dioxide positive electrode sheet. When winding the manganese dioxide positive electrode sheet, winding begins from the end closest to the positive electrode tab.

[0058] In one embodiment, inserting a separator into the inside of the manganese dioxide positive electrode sheet before the manganese dioxide positive electrode sheet is wound to the end includes: inserting the separator into the inside of the manganese dioxide positive electrode sheet when there is still 50-55 mm left at the end of the manganese dioxide positive electrode sheet.

[0059] In one embodiment, before wrapping the negative electrode strip around the outside of the diaphragm, the method includes: welding the negative electrode tab to the negative electrode strip.

[0060] This utility model embodiment also provides a method for preparing a lithium manganese dioxide battery, used to prepare the lithium manganese dioxide battery described in the above embodiment, comprising:

[0061] Provide a metal housing, with the bottom insulating pad placed at the bottom inside the metal housing;

[0062] The wound battery cell prepared in the above embodiments is assembled into a metal casing;

[0063] Place the second top insulating pad on top of the wound cell;

[0064] Provides an assembly of a cap, a sealing cap assembly, a cap assembly post, an insulating washer, and a first top insulating gasket;

[0065] The positive electrode tab is welded to the cover assembly post, and the negative electrode tab is welded to the metal casing.

[0066] The assembly is pressed into the metal shell, and the assembly is laser-welded to the metal shell.

[0067] Electrolyte is injected through the injection port, and the injection port is sealed with a steel ball.

[0068] The lithium manganese dioxide battery was obtained after discharge aging treatment.

[0069] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lithium manganese dioxide battery, characterized in that, The invention includes a wound battery cell, which comprises a manganese dioxide positive electrode sheet, a negative electrode strip, and a separator; the manganese dioxide positive electrode sheet is wound, the separator is wrapped around the outside of the manganese dioxide positive electrode sheet, and the negative electrode strip is wrapped around the outside of the separator; the negative electrode strip comprises a negative lithium electrode strip and a copper electrode strip, and the copper electrode strip is pressed onto the negative lithium electrode strip.

2. The lithium manganese dioxide battery according to claim 1, characterized in that, The thickness of the negative electrode lithium strip is 1 mm.

3. The lithium manganese dioxide battery according to claim 1, characterized in that, The manganese dioxide positive electrode has a particle size D50 of 8–10 micrometers.

4. The lithium manganese dioxide battery according to claim 3, characterized in that, The manganese dioxide positive electrode has a particle size D50 of 9 micrometers.

5. The lithium manganese dioxide battery according to claim 1, characterized in that, The copper strip extends along the length of the negative lithium strip.

6. The lithium manganese dioxide battery according to claim 4, characterized in that, The center line of the long axis of the copper strip and the center line of the long axis of the negative lithium strip are aligned on the same straight line.

7. The lithium manganese dioxide battery according to claim 6, characterized in that, The short axis centerline of the copper strip and the short axis centerline of the negative lithium strip are aligned on the same straight line.

8. The lithium manganese dioxide battery according to claim 1, characterized in that, The lithium manganese dioxide battery further includes a metal casing, an electrolyte, and a sealing cap assembly; the metal casing is used to house the wound cell and the electrolyte, and the sealing cap assembly is welded to the metal casing.

9. The lithium manganese dioxide battery according to claim 1, characterized in that, The diaphragm is a three-layer adhesive structure consisting of PP, PE, and PP.

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