Soft package zinc ion battery, battery pack and preparation method of soft package zinc ion battery

Abstract

The invention relates to a soft package zinc ion battery, a battery pack and a preparation method of the soft package zinc ion battery, the soft package zinc ion battery comprises an active component, a negative current collector, a negative tab and a plastic package shell, the negative current collector is arranged on one side, close to a negative electrode, in the active component, and the negative tab is arranged at one end of the negative current collector; and the active component and the negative current collector are arranged in the plastic package shell. Wherein the negative electrode lug is provided with a through hole, and the plastic package shell is in sealing connection with the negative electrode lug at the through hole, so that one end, far away from the negative electrode current collector, of the negative electrode lug is arranged outside the plastic package shell. The through hole is formed in the negative electrode lug, so that the plastic package shell can be adhered together through the through hole when the two sides of the negative electrode lug are sealed, the sealing stability is enhanced, liquid leakage is reduced, and the durability of the battery is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery packaging, and in particular to a soft-pack zinc ion battery, a battery pack, and a method for preparing the soft-pack zinc ion battery. Background Art

[0002] Rechargeable aqueous zinc-ion batteries (AZIBs) are a novel energy storage device that utilizes the movement of zinc ions in aqueous solution to store and release electrical energy. Due to their advantages such as high safety, high specific capacity, and low cost, they have attracted widespread attention in recent years. They are widely used in electric vehicles, distributed energy storage, mobile devices, military applications, and power systems, and are considered to have great development prospects.

[0003] Aqueous zinc-ion batteries use a metallic zinc salt solution as the electrolyte, and the negative electrode typically uses zinc foil or zinc-plated current collectors. During the battery design process, extended metal foil is often used as the tab. However, since hot-melt adhesive is difficult to seal the smooth metal foil tightly with the aluminum-plastic film, leakage often occurs. This leaked electrolyte can cause battery capacity degradation and reduce battery durability. Summary of the Invention

[0004] Based on this, it is necessary to provide a soft-pack zinc ion battery, a battery pack and a method for preparing a soft-pack zinc ion battery that can reduce battery leakage and improve battery durability in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a soft-pack zinc ion battery, comprising an active component, a negative electrode current collector, a negative electrode tab, and a plastic-encapsulated shell, wherein the negative electrode current collector is disposed on a side of the active component close to the negative electrode, the negative electrode tab is disposed at one end of the negative electrode current collector, and the active component and the negative electrode current collector are both disposed within the plastic-encapsulated shell;

[0006] The negative electrode tab is provided with a through hole, and the plastic shell is sealed and connected to the negative electrode tab at the through hole, so that the end of the negative electrode tab away from the negative electrode current collector is arranged outside the plastic shell.

[0007] In one embodiment, the number of the through holes is more than two.

[0008] In one embodiment, the negative electrode tab includes an insulating material and a conductive network wrapped by the insulating material, the conductive network is connected to the negative electrode current collector, and the conductive network is retained at the through-hole position of the negative electrode tab.

[0009] In one embodiment, the conductive network is composed of a plurality of conductive threads, and the conductive threads are arranged in parallel or crosswise.

[0010] In one embodiment, the soft-pack zinc ion battery further includes an adhesive, which is disposed between the through hole of the negative electrode tab and the plastic shell to assist in the fitting of the plastic shell and the negative electrode tab to complete the sealing.

[0011] In one embodiment, the active component includes a positive electrode sheet, a separator, a metal negative electrode and a battery electrolyte. The positive electrode sheet and the metal negative electrode are arranged on both sides of the separator. The battery electrolyte is filled between the positive electrode sheet and the separator and between the metal negative electrode and the separator, respectively. The metal negative electrode is connected to the negative electrode current collector.

[0012] In one embodiment, the soft-pack zinc-ion battery further includes a positive electrode tab, the positive electrode tab is connected to the positive electrode sheet, and one end of the positive electrode tab away from the positive electrode sheet is arranged outside the plastic package shell.

[0013] In a second aspect, the present application further provides a battery pack, comprising a plurality of separators and a plurality of soft-pack zinc-ion batteries as described in the above embodiments, wherein a separator is provided between each of the soft-pack zinc-ion batteries.

[0014] In a third aspect, the present application further provides a method for preparing a soft-pack zinc ion battery, the method being used to prepare the soft-pack zinc ion battery described in the above embodiments, comprising:

[0015] Provide active components;

[0016] Disposing a negative electrode current collector on a side of the active component close to the negative electrode, and disposing a negative electrode tab at one end of the negative electrode current collector;

[0017] A through hole is formed on the negative electrode tab;

[0018] The active component and the negative electrode current collector are wrapped with a plastic shell, and the plastic shell is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0019] In one embodiment, the step of opening a through hole on the negative electrode tab includes:

[0020] When a through hole is formed on the negative electrode tab, the insulating material at the through hole is removed and the conductive network at the through hole is retained.

[0021] In a fourth aspect, the present application further provides a soft-pack zinc ion battery preparation device, comprising:

[0022] Active spare parts module, used to provide active components;

[0023] A tab lead-out module is used to dispose the negative electrode current collector on the side of the active component close to the negative electrode, and to dispose a negative electrode tab at one end of the negative electrode current collector;

[0024] A tab cutting module, used for opening a through hole on the negative electrode tab;

[0025] The battery plastic packaging module is used to wrap the active component and the negative electrode current collector with a plastic packaging shell, and is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0026] In a fifth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0027] Provide active components;

[0028] Disposing a negative electrode current collector on a side of the active component close to the negative electrode, and disposing a negative electrode tab at one end of the negative electrode current collector;

[0029] A through hole is formed on the negative electrode tab;

[0030] The active component and the negative electrode current collector are wrapped with a plastic shell, and the plastic shell is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0031] In a sixth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0032] Provide active components;

[0033] Disposing a negative electrode current collector on a side of the active component close to the negative electrode, and disposing a negative electrode tab at one end of the negative electrode current collector;

[0034] A through hole is formed on the negative electrode tab;

[0035] The active component and the negative electrode current collector are wrapped with a plastic shell, and the plastic shell is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0036] In a seventh aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0037] Provide active components;

[0038] Disposing a negative electrode current collector on a side of the active component close to the negative electrode, and disposing a negative electrode tab at one end of the negative electrode current collector;

[0039] A through hole is formed on the negative electrode tab;

[0040] The active component and the negative electrode current collector are wrapped with a plastic shell, and the plastic shell is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0041] The soft-pack zinc-ion battery, battery pack, and method for preparing a soft-pack zinc-ion battery are described above. The soft-pack zinc-ion battery includes an active component, a negative electrode current collector, a negative electrode tab, and a plastic shell. The negative electrode current collector is disposed on a side of the active component close to the negative electrode, and the negative electrode tab is disposed at one end of the negative electrode current collector. Both the active component and the negative electrode current collector are disposed within the plastic shell. The negative electrode tab is provided with a through hole, and the plastic shell is sealed to the negative electrode tab at the through hole so that the end of the negative electrode tab away from the negative electrode current collector is disposed outside the plastic shell. By providing a through hole on the negative electrode tab, the plastic shell can adhere together through the through hole when sealing on both sides of the negative electrode tab, thereby strengthening the sealing stability, reducing leakage, and thereby improving the durability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 Schematic diagram of the structure of a soft-pack zinc ion battery in one embodiment;

[0044] Figure 2 2 is a schematic structural diagram of a soft-pack zinc ion battery in another embodiment;

[0045] Figure 3 Schematic diagram of the structure of a soft-pack zinc ion battery in another embodiment;

[0046] Figure 4 Schematic diagram of a method for preparing a soft-pack zinc ion battery in one embodiment;

[0047] Figure 5 A schematic structural diagram of a soft-pack zinc ion battery in another embodiment;

[0048] Figure 6 Schematic cross-sectional view of a soft-pack zinc ion battery in one embodiment;

[0049] Figure 7 This is a structural block diagram of a device for preparing a soft-pack zinc ion battery in one embodiment;

[0050] Figure 8 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment.

[0051] Explanation of the accompanying symbols: active component 110, negative electrode current collector 130, negative electrode tab 150, plastic packaging shell 170, positive electrode sheet 111, separator 113, metal negative electrode 115, positive electrode tab 117, aluminum-plastic packaging shell 01 aluminum-plastic packaging shell 02, negative electrode current collector 03, zinc metal negative electrode 04, separator 05, positive electrode sheet 06, negative electrode tab 07, positive electrode tab 08, aluminum-plastic film negative electrode sealing position 09, negative electrode tab conductive network 10. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0054] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0055] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0057] A metal-ion battery is a secondary battery that primarily operates by the movement of metal ions between the positive and negative electrodes. During discharge, metal ions in the negative electrode release electrons, becoming metal ions. These electrons flow through an external circuit to the positive electrode. Simultaneously, the metal ions migrate through the electrolyte toward the positive electrode and intercalate into the positive electrode material. The charging process is the opposite: an external power source supplies current to the battery, causing the metal ions in the positive electrode to release electrons (reduced to metal), migrate through the electrolyte to the negative electrode, and then reintegrate into the negative electrode. Metal-ion batteries primarily include lithium-ion batteries, sodium-ion batteries, aluminum-ion batteries, magnesium-ion batteries, iron-ion batteries, and zinc-ion batteries. In the various embodiments of this application, zinc-ion batteries, in which zinc is the metal, will be used as an example for illustration. Zinc-ion batteries offer advantages such as high power density, high energy density, and low cost. The zinc element is easily recyclable and reusable, and they pose no significant environmental risks. Compared to lithium and cobalt batteries, they have a lower environmental impact after disposal. Furthermore, the zinc-ion battery can be a soft-pack zinc-ion battery.

[0058] Soft-pack zinc-ion batteries use soft-pack packaging technology, with an aluminum-plastic composite film as the outer shell. The high barrier properties of the aluminum-plastic composite film are used to isolate the inside of the battery from the outside, so that the inside of the battery is in a sealed environment. The negative electrode tab in a soft-pack zinc-ion battery is usually made of zinc foil or zinc material. However, it is difficult to seal the smooth metal foil and the aluminum-plastic film of the outer shell tightly with hot melt adhesive. Therefore, leakage often occurs. The leaked electrolyte will cause the battery capacity to decay, resulting in a decrease in battery durability. Therefore, in order to address the problem of high sealing difficulty and easy leakage of battery capacity decay in zinc-ion batteries, the present application provides a soft-pack zinc-ion battery that can improve the sealing of metal-ion batteries, reduce the occurrence of leakage, and improve the safety of metal-ion batteries.

[0059] Furthermore, soft-pack zinc ion batteries can be either aqueous or non-aqueous, differing in the dielectrics used. Aqueous zinc ion batteries use zinc as the negative electrode, storing and releasing electrical energy through the movement of zinc ions in an aqueous solution between the positive and negative electrodes. Aqueous zinc ion batteries can be rechargeable, capable of repeatedly storing electrical energy. During charging, zinc ions escape from the negative electrode, migrate to the positive electrode through the electrolyte solution, and react chemically with the positive electrode material to form a stable compound. During discharge, zinc ions return from the positive electrode to the negative electrode, releasing the stored electrical energy. Because water is used as the electrolyte, aqueous zinc ion batteries offer greater safety compared to flammable and explosive organic electrolytes, reducing the risk of battery short circuits, combustion, and even explosions.

[0060] In an exemplary embodiment, Figure 1As shown, the soft-pack zinc-ion battery includes an active component 110, a negative electrode current collector 130, a negative electrode tab 150, and a plastic shell 170. The negative electrode current collector 130 is disposed on a side of the active component 110 close to the negative electrode, and the negative electrode tab 150 is disposed at one end of the negative electrode current collector 130. The active component 110 and the negative electrode current collector 130 are both disposed within the plastic shell 170. The negative electrode tab 150 is provided with a through hole, and the plastic shell 170 is sealed to the negative electrode tab 150 at the through hole, so that the end of the negative electrode tab 150 away from the negative electrode current collector 130 is disposed outside the plastic shell 170.

[0061] Among them, the negative electrode current collector 130 is an important component of the negative electrode of the soft-pack zinc ion battery. Therefore, the negative electrode current collector 130 is arranged on the side of the active component 110 close to the negative electrode so that it can carry the negative electrode active material and collect and output the current generated by the active material during the charge and discharge process. The negative electrode tab 150 is a metal conductor drawn out from the negative electrode current collector 130, which is used to lead the current on the negative electrode current collector 130 to the outside of the battery. It is a bridge connecting the internal and external circuits of the battery to ensure that the battery can operate normally. In this embodiment, the negative electrode tab 150 is arranged at one end of the negative electrode current collector 130 and is kept partially exposed outside the plastic shell 170 when the plastic shell 170 is encapsulated to facilitate the operation of the soft-pack zinc ion battery.

[0062] Optionally, the negative electrode current collector 130 and the negative electrode tab 150 may be welded, that is, the negative electrode tab 150 may be welded to the negative electrode current collector 130. The negative electrode current collector 130 may also be formed by stamping the negative electrode tab 150 onto the surface of the negative electrode current collector 130. The negative electrode current collector 130 may also be formed by cutting the negative electrode tab 150 from the negative electrode current collector 130 using cutting techniques such as laser cutting.

[0063] The soft-pack zinc ion battery is a liquid battery that uses a plastic-encapsulated shell 170 as a shell. The plastic-encapsulated shell 170 has a certain degree of flexibility and can be appropriately deformed, so it is called a soft-pack. Among them, the plastic-encapsulated shell 170 is usually made of aluminum-plastic composite film. However, when the aluminum-plastic composite film is encapsulated with a metal foil, especially a metal foil containing zinc, there is a problem of poor contact resulting in poor sealing and easy leakage. For this reason, the present application provides a through hole on the negative electrode tab 150 so that the plastic-encapsulated shell 170 is encapsulated with the negative electrode tab 150 through the through hole. The plastic-encapsulated shells 170 on both sides of the negative electrode tab 150 are integrated through the through hole when sealing. On the one hand, it is conducive to improving the sealing performance. On the other hand, it can further fix the relative position between the negative electrode tab 150 and the plastic-encapsulated shell 170, making the soft-pack encapsulation more reliable.

[0064] Specifically, the through hole on the negative electrode tab 150 can be obtained by cutting, trimming, or other methods to remove part of the material on the negative electrode tab 150 according to a specific pattern. The pattern of the through hole is not limited and can be rectangular, circular, polygonal, or irregular. Further, in an exemplary embodiment, as Figure 2 As shown, there are two or more through holes, and each through hole can be arranged parallel to the connection line between the negative electrode tab 150 and the negative electrode current collector 130, or can be arranged in other ways. When the plastic shell 170 is sealed to the negative electrode tab 150, the plastic shell 170 will be sealed to the negative electrode tab 150 at the location of the through hole according to the location of the through hole, so as to achieve a reinforced seal through the through hole.

[0065] Active component 110 is a key part of the soft-pack zinc ion battery, which is used to supply or store electrical energy. Figure 3 As shown, the active component 110 includes a positive electrode sheet 111, a separator 113, a metal negative electrode 115 and a battery electrolyte. The positive electrode sheet 111 and the metal negative electrode 115 are arranged on both sides of the separator 113. The battery electrolyte is filled between the positive electrode sheet 111 and the separator 113, and between the metal negative electrode 115 and the separator 113 respectively. The metal negative electrode 115 is connected to the negative electrode current collector 130.

[0066] The positive electrode sheet 111 is a sheet-shaped positive electrode. The material used for the positive electrode sheet 111 generally has a high specific capacity, good conductivity, and stability. In zinc-ion batteries, possible positive electrode materials include V2O5 and MnO2. These materials can undergo a reversible redox reaction with zinc ions, thereby storing and releasing energy.

[0067] The separator 113 is used to separate the positive and negative electrodes of the battery and prevent short circuits. Generally speaking, the separator 113 needs to have good ionic conductivity, mechanical strength, and chemical stability. For example, the separator 113 is often made of glass fiber membrane, polyolefin membrane, etc. The separator 113 can effectively separate the positive electrode 111 and the metal negative electrode 115, while allowing zinc ions to be freely transferred in the battery electrolyte.

[0068] The metal negative electrode 115 is the negative electrode of the soft-pack zinc-ion battery, typically a zinc metal negative electrode 115, whose main function is to store zinc ions and provide electrons. The negative electrode material is generally required to have a high specific capacity, good cycle stability, and low cost. In soft-pack zinc-ion batteries, the material used for the metal negative electrode 115 is mainly metallic zinc or its alloy. Furthermore, in order to improve the conductivity and cycle stability of the metal negative electrode 115, the metal negative electrode 115 can also be surface treated or a conductive agent can be added.

[0069] The battery electrolyte is used to conduct zinc ions and form a potential difference between the positive electrode sheet 111 and the metal negative electrode 115. The performance of the electrolyte can affect the energy density, cycle life and safety performance of the battery. Optionally, the battery electrolyte can be selected from aqueous electrolytes, gel electrolytes and solid electrolytes. When the soft-pack zinc ion battery is a soft-pack aqueous zinc ion battery, the battery electrolyte is an aqueous electrolyte. When the soft-pack zinc ion battery is a non-aqueous zinc ion battery, the battery electrolyte can be an electrolyte of other solvents.

[0070] Furthermore, in an exemplary embodiment, Figure 3 As shown, the soft-pack zinc-ion battery further includes a positive electrode tab 117 , which is connected to the positive electrode sheet 111 , and one end of the positive electrode tab 117 away from the positive electrode sheet 111 is disposed outside the plastic package shell 170 .

[0071] The positive electrode tab 117 is similar to the negative electrode tab 150 and can be extended from the positive electrode sheet 111 or added to the positive electrode sheet 111. Preparation methods include but are not limited to welding, stamping, welding, etc. The positive electrode tab 117 is usually made of a material with good electrical conductivity, such as copper, nickel, or copper-plated nickel. Similarly, the positive electrode tab 117 is also partially exposed outside the plastic shell 170, that is, the plastic shell 170 needs to be sealed and connected to the positive electrode tab 117.

[0072] Optionally, in order to improve the sealing of the soft-pack zinc-ion battery, a through hole can also be provided on the positive electrode tab 117 so that the plastic shell 170 can be packaged through the through hole on the positive electrode tab 117 to improve the sealing of the package. Furthermore, the through hole provided on the positive electrode tab 117 can be obtained by cutting, trimming, etc., and removing part of the material on the positive electrode tab 117 according to a specific pattern. The pattern of the through hole is not limited and can be a rectangular, circular, polygonal, and irregular pattern. In an exemplary embodiment, the number of through holes is two or more, and each through hole can be arranged parallel to the connecting line between the positive electrode tab 117 and the positive electrode sheet 111, or can be arranged in other ways. When the plastic shell 170 is sealed to the positive electrode tab 117, the plastic shell 170 will be sealed to the positive electrode tab 117 at the location of the through hole according to the setting position of the through hole, so as to achieve sealing reinforcement through the through hole.

[0073] In the above embodiment, the soft-pack zinc-ion battery includes an active component 110, a negative electrode current collector 130, a negative electrode tab 150, and a plastic shell 170. The negative electrode current collector 130 is disposed on a side of the active component 110 close to the negative electrode, and the negative electrode tab 150 is disposed at one end of the negative electrode current collector 130. The active component 110 and the negative electrode current collector 130 are both disposed within the plastic shell 170. The negative electrode tab 150 is provided with a through hole, and the plastic shell 170 is sealedly connected to the negative electrode tab 150 at the through hole, so that the end of the negative electrode tab 150 away from the negative electrode current collector 130 is disposed outside the plastic shell 170. By providing a through hole on the negative electrode tab 150, the plastic shell 170 can be adhered together through the through hole when sealing on both sides of the negative electrode tab 150, thereby strengthening the sealing stability, reducing leakage, and thereby improving the durability of the battery.

[0074] In an exemplary embodiment, the negative electrode tab 150 includes an insulating material and a conductive network wrapped by the insulating material. The conductive network is connected to the negative electrode current collector 130 , and the conductive network is retained at the through-hole position of the negative electrode tab 150 .

[0075] The negative electrode tab 150 is responsible for connecting the negative electrode inside the battery to the external circuit, that is, the conductive network in the negative electrode tab 150 needs to be connected to the negative electrode current collector 130. The negative electrode tab 150 includes a conductive network made of a conductive metal material that can conduct current.

[0076] Alternatively, the conductive network may be a grid-like conductor of any shape, such as a rectangular grid, a triangular grid, a polygonal grid, etc. It should be noted that there are gaps in the grid of the conductive network, that is, the conductive network is essentially a porous structure or a mesh structure, which allows the insulating material covering one side of the conductive network to connect to the insulating material covering the other side of the conductive network through the holes.

[0077] Furthermore, in an exemplary embodiment, the conductive network is composed of a plurality of conductive filaments, each of which is arranged in parallel or crosswise. The conductive filaments can form conductive networks of different shapes through different arrangements. When the conductive filaments are arranged in parallel, the gaps in the conductive network are strip-shaped areas, and the plastic-encapsulated shell 170 can be sealed and connected through the strip-shaped gaps at the through-holes of the negative electrode tab 150. When the conductive filaments are arranged crosswise, the gaps in the conductive network can be triangular, quadrilateral, polygonal, and irregular shapes, and the plastic-encapsulated shell 170 can be sealed and connected through the different gaps at the through-holes of the negative electrode tab 150. When the conductive filaments are partially arranged in parallel and partially arranged crosswise, the conductive network can form a rectangular grid or a parallelogram grid; when the conductive filaments can be bent in a plane or folded in a three-dimensional manner, the conductive network can form a more complex planar structure or three-dimensional structure. The conductive filaments can also be arranged in different ways to form different conductive networks, which will not be described in detail here.

[0078] Specifically, when a through-hole is formed in the negative electrode tab 150, in the aforementioned embodiment, the through-hole refers to completely cutting the negative electrode tab 150 material within the through-hole. In this embodiment, the conductive network for electrical conduction can be retained in the through-hole of the negative electrode tab 150, and only the insulating material at the through-hole is removed. Because there are gaps in the mesh of the conductive network, while retaining the conductive network, the plastic housing 170 can still be connected to the negative electrode tab 150 through the gaps in the conductive network when sealed, thereby ensuring sealing performance and reducing the occurrence of leakage.

[0079] In this embodiment, by retaining the conductive network at the through-hole of the negative electrode tab 150, a relatively stable and firm soft-pack packaging can be achieved without reducing the conductivity of the negative electrode tab 150, which is beneficial for improving battery performance while ensuring battery safety.

[0080] In an exemplary embodiment, the soft-pack zinc-ion battery further includes an adhesive, which is disposed between the through hole of the negative electrode tab 150 and the plastic shell 170 to assist in the sealing of the plastic shell 170 and the negative electrode tab 150 .

[0081] In order to further improve the sealing performance of the soft-pack zinc-ion battery, when the negative electrode tab 150 and the plastic shell 170 are sealed, an adhesive can be applied to the through hole of the negative electrode tab 150 and the corresponding area of the plastic shell 170 near the through hole to assist in completing the sealing connection between the plastic shell 170 and the negative electrode tab 150. Optionally, the adhesive can be a hot melt adhesive or glue.

[0082] Based on the same technical concept, the present application also provides a battery pack, which includes multiple separators and multiple soft-pack zinc-ion batteries as described in the above embodiments, and separators are provided between each soft-pack zinc-ion battery.

[0083] Specifically, multiple soft-pack zinc-ion batteries are placed side by side, with the negative tabs of each soft-pack zinc-ion battery facing upward. Separators are then placed between the soft-pack zinc-ion batteries, ensuring that there is a separator between every two soft-pack zinc-ion batteries. The separators isolate and support the soft-pack zinc-ion batteries, preventing them from direct contact or causing short circuits. For example, the separators can be made of a polymer material, such as polycarbonate (PC) or polystyrene (PS). Alternatively, the separators can be made of a ceramic material to provide insulation protection between the soft-pack zinc-ion batteries.

[0084] Furthermore, the battery pack also includes a plastic shell, which is used to wrap each soft-pack zinc ion battery and each separator to support and fix each soft-pack zinc ion battery and each separator, thereby obtaining a stable and easy-to-use battery pack.

[0085] In order to prepare the soft-pack zinc-ion batteries described in the above embodiments, the present application also provides a method for preparing a soft-pack zinc-ion battery, which can be prepared using a processor or computer and corresponding mechanical equipment. The processor or computer can be, but is not limited to, various personal computers, laptops, smartphones, tablet computers, and Internet of Things devices.

[0086] In an exemplary embodiment, Figure 4 As shown, a method for preparing a soft-pack zinc ion battery is provided, including the following steps 202 to 208.

[0087] Step 202: providing an active component.

[0088] The active components include a positive electrode sheet, a separator, a metal negative electrode, and a battery electrolyte. The positive electrode sheet and the metal negative electrode are placed on opposite sides of the separator, with the battery electrolyte filling the space between the positive electrode sheet and the separator, and the space between the metal negative electrode and the separator, respectively. The metal negative electrode is connected to the negative electrode current collector.

[0089] The positive electrode sheet is a sheet-shaped positive electrode. The materials used for positive electrode sheets typically have high specific capacity, good conductivity, and stability. In zinc-ion batteries, possible positive electrode materials include V2O5 and MnO2. These materials undergo a reversible redox reaction with zinc ions, storing and releasing energy.

[0090] The separator is used to separate the positive and negative electrodes of a battery and prevent short circuits. Generally speaking, separators need to have good ionic conductivity, mechanical strength, and chemical stability. For example, separators are often made of glass fiber membranes, polyolefin membranes, etc. The separator effectively separates the positive electrode from the metal negative electrode while allowing zinc ions to flow freely in the battery electrolyte.

[0091] The metal anode is the negative electrode of a soft-pack zinc-ion battery, typically a zinc metal anode. Its primary function is to store zinc ions and provide electrons. The anode material typically needs to have high specific capacity, good cycle stability, and low cost. In soft-pack zinc-ion batteries, the metal anode is primarily made of zinc metal or its alloys. Furthermore, to improve the conductivity and cycle stability of the metal anode, the metal anode may be surface treated or a conductive agent may be added.

[0092] The battery electrolyte is used to conduct zinc ions and form a potential difference between the positive electrode and the metal negative electrode. The performance of the electrolyte can affect the energy density, cycle life, and safety performance of the battery. Alternatively, the battery electrolyte can be selected from aqueous electrolytes, gel electrolytes, solid electrolytes, etc. When the soft-pack zinc ion battery is a soft-pack aqueous zinc ion battery, the battery electrolyte is an aqueous electrolyte. When the soft-pack zinc ion battery is a non-aqueous zinc ion battery, the battery electrolyte can be an electrolyte of other solvents.

[0093] In step 204 , a negative electrode current collector is disposed on a side of the active component close to the negative electrode, and a negative electrode tab is disposed at one end of the negative electrode current collector.

[0094] The negative electrode current collector is a crucial component of the negative electrode in a soft-pack zinc-ion battery. Therefore, it is placed near the negative electrode within the active component, enabling it to carry the negative electrode active material and collect and output the current generated by the active material during charge and discharge. The negative electrode tab is a metallic conductor extending from the negative electrode current collector, used to conduct the current from the negative electrode current collector to the outside of the battery. It bridges the gap between the internal and external circuits of the battery, ensuring proper functioning of the battery.

[0095] Optionally, the negative electrode current collector and the negative electrode tab may be welded together, i.e., the negative electrode tab may be welded to the negative electrode current collector. Alternatively, the negative electrode current collector may be formed by stamping the negative electrode tab onto the surface of the negative electrode current collector. Alternatively, the negative electrode current collector may be formed by cutting the negative electrode tab from the negative electrode current collector using a cutting technique such as laser cutting.

[0096] Step 206: Open a through hole on the negative electrode tab.

[0097] Specifically, the through-holes on the negative electrode tabs can be formed by cutting or trimming to remove a portion of the material on the negative electrode tabs according to a specific pattern. The pattern of the through-holes is not limited and can be rectangular, circular, polygonal, or irregular.

[0098] Optionally, the number of through holes may be two or more, and each through hole may be arranged parallel to the connection line between the negative electrode tab and the negative electrode current collector, or may be arranged in other ways. When the plastic shell is sealed to the negative electrode tab, the plastic shell will be sealed to the negative electrode tab at the location of the through hole according to the location of the through hole, so as to achieve a reinforced seal through the through hole.

[0099] Furthermore, step 206 may include step 302: when opening a through hole on the negative electrode tab, removing the insulating material at the through hole and retaining the conductive network at the through hole.

[0100] Among them, the negative electrode tab includes an insulating material and a conductive network wrapped by the insulating material, and the conductive network is connected to the negative electrode current collector. The negative electrode tab is responsible for connecting the negative electrode inside the battery to the external circuit, that is, the conductive network in the negative electrode tab needs to be connected to the negative electrode current collector. The negative electrode tab includes a conductive network, which is made of a conductive metal material and can conduct current. Optionally, the conductive network can be a grid-like conductor of any shape, and there are gaps in the grid of the conductive network, so that the insulating material covering one side of the conductive network can be connected to the insulating material covering the other side of the conductive network through the holes.

[0101] When a through-hole is formed in the negative electrode tab, the conductive network for conducting electricity can be retained in the through-hole of the negative electrode tab, and only the insulating material at the through-hole is removed. Since there are gaps in the grid of the conductive network, the plastic shell can still be sealed to the negative electrode tab through the gaps in the conductive network while retaining the conductive network, thus ensuring sealing performance and reducing the risk of leakage.

[0102] Step 208: Use a plastic package to wrap the active component and the negative electrode current collector, and seal the plastic package with the negative electrode tab at the through hole of the negative electrode tab.

[0103] The plastic shell is typically made of aluminum-plastic composite film, encapsulating the active components and the negative electrode current collector. When sealed with the negative electrode tab, the plastic shell allows for sealing with the negative electrode tab through a through-hole provided in the negative electrode tab. In other words, the plastic shells on both sides of the negative electrode tab are integrated through the through-hole during sealing. This not only improves sealing performance, but also further secures the relative position between the negative electrode tab and the plastic shell, making soft-pack packaging more reliable.

[0104] In the above-mentioned soft-pack zinc-ion battery preparation method, an active component is provided, a negative electrode current collector is disposed on one side of the active component near the negative electrode, a negative electrode tab is disposed at one end of the negative electrode current collector, a through-hole is provided in the negative electrode tab, and a plastic shell is used to wrap the active component and the negative electrode current collector, and is sealed to the negative electrode tab at the through-hole of the negative electrode tab. When preparing the soft-pack zinc-ion battery, by providing a through-hole in the negative electrode tab, the plastic shell can adhere to both sides of the negative electrode tab through the through-hole when sealing, thereby strengthening the sealing stability, reducing leakage, and thus improving the battery durability.

[0105] In order to better understand the above solution, a detailed explanation is given below in conjunction with a specific embodiment.

[0106] like Figure 5As shown, the soft-pack zinc-ion battery is a rechargeable soft-pack aqueous zinc-ion battery, comprising an aluminum-plastic packaging shell (corresponding to reference numerals 01 and 02); a negative electrode current collector 03; a zinc metal negative electrode 04; a separator 05; a positive electrode sheet 06; a negative electrode tab 07; a positive electrode tab 08; and an aluminum-plastic film negative electrode sealing portion 09. The zinc metal negative electrode 04, separator 05, and positive electrode sheet 06, along with the electrolyte filled between them, constitute the active component. The negative electrode current collector 03 is disposed on the side of the active component close to the zinc metal negative electrode 04. The aluminum-plastic packaging shell 01 is disposed on the side of the negative electrode current collector 03 away from the active component. The aluminum-plastic packaging shell 02 is disposed on the low-voltage side of the active component close to the positive electrode sheet 06. One side of the aluminum-plastic packaging shell 01 is provided with an aluminum-plastic film negative electrode sealing position 09, which can also be called a sealing film. The negative electrode current collector 03 has a negative electrode tab 07 extending from the corresponding position of the sealing film, and the positive electrode sheet 06 has a positive electrode tab 08 extending from the corresponding position of the sealing film.

[0107] Among them, such as Figure 6 As shown, in the cross-sectional schematic diagram of the rechargeable soft-pack aqueous zinc-ion battery, the positional relationship between the negative electrode current collector 03 and the negative electrode tab 07 is shown in the figure, and the two are connected to each other, which can be a direct connection of conductors. A negative electrode tab conductive network 10 is provided on the negative electrode tab 07. As shown in the figure, two conductive networks, i.e., through holes, are provided, so that during plastic sealing, the aluminum-plastic packaging shell 01 and the aluminum-plastic packaging shell 02 can be directly adhered through the negative electrode tab conductive network 10. On the one hand, the position of the negative electrode tab 07 can be fixed, and on the other hand, the sealing performance of the aluminum-plastic packaging is improved. When the aluminum-plastic packaging shell 01 and the aluminum-plastic packaging shell 02 are sealed, hot melt adhesive can be applied to the side of the sealing film close to the negative electrode tab 07 as an adhesive to assist in improving the sealing.

[0108] The specific steps are as follows: A through-hole is cut out of the negative electrode tab 07, leaving the negative electrode tab conductive network 10; the negative electrode tab 07 is placed in the sealed aluminum-plastic casing. The soft-pack zinc-ion battery to be sealed (referring to the active component and negative electrode current collector 03, as well as part of the positive electrode tab 08 and part of the negative electrode tab 07) is placed in the aluminum-plastic casing (aluminum-plastic packaging shell 01 and aluminum-plastic packaging shell 02). The inner surface of the aluminum-plastic casing is coated with hot melt adhesive and then heat-pressed to seal all sides. During the hot pressing process, the negative electrode tab 07 is placed on the sealing film, flush with the positive electrode tab, and heat-laminated on all sides. The sealing film can penetrate the holes in the negative electrode tab conductive network 10 and adhere to each other, firmly holding the negative electrode tab 07. At the same time, the hot melt adhesive used for sealing blocks the micropores between the sealing film and the metal, thus preventing electrolyte leakage from the negative electrode tab 07.

[0109] For example, the thickness of the aluminum-plastic packaging shell 01 and the aluminum-plastic packaging shell 02 is between 0.05 and 1 mm. The negative electrode current collector 03 is a sheet metal with a thickness between 0.001 and 0.5 mm. The material can be copper, iron, titanium, tin, and other metals and their alloys. Optionally, the negative electrode tab 07 can be cut into a long sheet, and through holes can be cut in the negative electrode tab 07 to retain the conductive metal network for electrical conductivity. The through holes can be rectangular, circular, or prismatic in shape, as long as they are through holes. The conductive metal network retained in the through holes can be arranged in a staggered mesh pattern.

[0110] Further, after completing the encapsulation of the rechargeable soft-packed water-based zinc ion battery by the above steps, multiple rechargeable soft-packed water-based zinc ion batteries can also be combined into a battery module. The battery module includes a plastic shell, multiple rechargeable soft-packed water-based zinc ion batteries and multiple separators, the negative pole tab 07 of each rechargeable soft-packed water-based zinc ion battery is all placed upward, the separator is placed between two rechargeable soft-packed water-based zinc ion batteries, and a separator is placed between every two rechargeable soft-packed water-based zinc ion batteries, and then the plastic shell is coated on the outside of each rechargeable soft-packed water-based zinc ion battery and each separator, thereby forming a complete battery module.

[0111] In this embodiment, the applicant actually used the packaging scheme of the present application for comparison with other packaging schemes. When other structures of the battery remained unchanged, the variables were set to include: ordinary tabs (i.e., the negative tab 07 was not provided with a negative electrode tab conductive network 10) and not coated with sealant (i.e., an adhesive such as hot melt adhesive), ordinary tabs with sealant, conductive network tabs (i.e., the negative tab 07 was provided with a negative electrode tab conductive network 10) and not coated with sealant, and conductive network tabs with sealant. Four groups of experimental batteries were used as controls to test the leakage of each group.

[0112] The leakage of each group of experimental batteries was checked on the 1st, 2nd, 7th, 15th, 30th, and 60th day after the start of the experiment. It was found that the experimental battery with ordinary tabs and no sealant began to leak on the 1st day; the experimental battery with ordinary tabs and sealant began to leak on the 2nd day; the experimental battery with conductive network tabs and no sealant still did not leak on the 60th day; and the experimental battery with conductive network tabs and sealant still did not leak on the 60th day. It is obvious from the experimental data that the aqueous zinc-ion battery using conductive network tabs has good sealing performance, regardless of whether sealant is used for auxiliary sealing at the tab position, which can reduce the occurrence of leakage. Even when it is tilted or placed horizontally, it can maintain good sealing performance, with good packaging effect, effectively improving the durability of the battery.

[0113] The soft-pack aqueous zinc-ion battery sealing method and structure provided in this embodiment are such that, during the hot pressing process, the sealing film can penetrate the holes in the conductive network of the negative electrode tab and adhere to each other, tightly fastening the tab. At the same time, the sealant can block the micropores between the sealing film and the metal, thereby solving the problem of electrolyte penetration from the negative electrode tab and improving battery durability.

[0114] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0115] Based on the same inventive concept, the present application also provides a soft-pack zinc ion battery preparation device for implementing the above-mentioned soft-pack zinc ion battery preparation method. The solution to the problem provided by this device is similar to the solution described in the above-mentioned method. Therefore, the specific limitations of one or more soft-pack zinc ion battery preparation device embodiments provided below can be referred to the limitations of the soft-pack zinc ion battery preparation method above, and will not be repeated here.

[0116] In an exemplary embodiment, Figure 7 As shown, a soft-pack zinc-ion battery preparation device is provided, including: an active spare part module 702, a tab lead-out module 704, a tab cutting module 706 and a battery plastic sealing module 708, wherein:

[0117] Active spare parts module 702, for providing active components;

[0118] The tab lead module 704 is used to place the negative electrode current collector on the side of the active component close to the negative electrode, and to place a negative electrode tab on one end of the negative electrode current collector;

[0119] Tab cutting module 706, used to open a through hole on the negative electrode tab;

[0120] The battery plastic packaging module 708 is used to wrap the active components and the negative electrode current collector with a plastic packaging shell, and to seal and connect with the negative electrode tab at the through hole of the negative electrode tab.

[0121] In one embodiment, the tab cutting module 706 is further configured to remove the insulating material at the through-hole when opening the through-hole on the negative electrode tab, and retain the conductive network at the through-hole.

[0122] Each module in the above-mentioned soft-pack zinc-ion battery preparation device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each of the above modules.

[0123] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 8 As shown. The computer device includes a processor, memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals via wired or wireless means, and the wireless means can be implemented via Wi-Fi, mobile cellular networks, near-field communication (NFC), or other technologies. When executed by the processor, the computer program implements a method for preparing a soft-pack zinc-ion battery. The display unit of the computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0124] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0125] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0126] Provide active components;

[0127] The negative electrode current collector is arranged on the side of the active component close to the negative electrode, and a negative electrode tab is arranged at one end of the negative electrode current collector;

[0128] A through hole is formed on the negative electrode tab;

[0129] The active components and the negative electrode current collector are wrapped in a plastic shell, and are sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0130] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0131] When a through hole is opened on the negative electrode tab, the insulating material at the through hole is removed and the conductive network at the through hole is retained.

[0132] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0133] Provide active components;

[0134] The negative electrode current collector is arranged on the side of the active component close to the negative electrode, and a negative electrode tab is arranged at one end of the negative electrode current collector;

[0135] A through hole is formed on the negative electrode tab;

[0136] The active components and the negative electrode current collector are wrapped in a plastic shell, and are sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0137] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0138] When a through hole is opened on the negative electrode tab, the insulating material at the through hole is removed and the conductive network at the through hole is retained.

[0139] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0140] Provide active components;

[0141] The negative electrode current collector is arranged on the side of the active component close to the negative electrode, and a negative electrode tab is arranged at one end of the negative electrode current collector;

[0142] A through hole is formed on the negative electrode tab;

[0143] The active components and the negative electrode current collector are wrapped in a plastic shell, and are sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

[0144] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0145] When a through hole is opened on the negative electrode tab, the insulating material at the through hole is removed and the conductive network at the through hole is retained.

[0146] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0147] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0148] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A soft-pack zinc ion battery, characterized in that: The soft-pack zinc ion battery comprises an active component, a negative electrode current collector, a negative electrode tab and a plastic-sealed shell, wherein the negative electrode current collector is arranged on a side of the active component close to the negative electrode, the negative electrode tab is arranged at one end of the negative electrode current collector, and the active component and the negative electrode current collector are both arranged in the plastic-sealed shell; The negative electrode tab is provided with a through hole, and the plastic shell is sealed and connected to the negative electrode tab at the through hole, so that the end of the negative electrode tab away from the negative electrode current collector is arranged outside the plastic shell.

2. The soft-pack zinc ion battery according to claim 1, characterized in that The number of the through holes is more than two.

3. The soft-pack zinc ion battery according to claim 1, characterized in that: The negative electrode tab includes an insulating material and a conductive network wrapped by the insulating material. The conductive network is connected to the negative electrode current collector, and the conductive network is retained at the through-hole position of the negative electrode tab.

4. The soft-pack zinc ion battery according to claim 3, characterized in that The conductive network is composed of a plurality of conductive threads, and the conductive threads are arranged in parallel or crosswise.

5. The soft-pack zinc ion battery according to claim 1, characterized in that: The soft-pack zinc ion battery further includes an adhesive, which is disposed between the through hole of the negative electrode tab and the plastic-sealed shell to assist the plastic-sealed shell in laminating and sealing the negative electrode tab.

6. The soft-pack zinc ion battery according to any one of claims 1 to 5, characterized in that: The active component includes a positive electrode sheet, a separator, a metal negative electrode and a battery electrolyte. The positive electrode sheet and the metal negative electrode are arranged on both sides of the separator. The battery electrolyte is filled between the positive electrode sheet and the separator and between the metal negative electrode and the separator respectively. The metal negative electrode is connected to the negative electrode current collector.

7. The soft-pack zinc ion battery according to claim 6, characterized in that: The soft-pack zinc-ion battery further includes a positive electrode tab, which is connected to the positive electrode sheet, and an end of the positive electrode tab away from the positive electrode sheet is arranged outside the plastic-encapsulated shell.

8. A battery pack, characterized in that: The battery pack includes a plurality of separators and a plurality of soft-pack zinc-ion batteries according to any one of claims 1 to 7, wherein a separator is provided between each of the soft-pack zinc-ion batteries.

9. A method for preparing a soft-pack zinc ion battery, characterized in that: The method is used to prepare the soft-pack zinc ion battery according to any one of claims 1 to 8, comprising: Provide active components; Disposing a negative electrode current collector on a side of the active component close to the negative electrode, and disposing a negative electrode tab at one end of the negative electrode current collector; A through hole is formed on the negative electrode tab; The active component and the negative electrode current collector are wrapped with a plastic shell, and the plastic shell is sealed and connected to the negative electrode tab at the through hole of the negative electrode tab.

10. The method for preparing a soft-pack zinc ion battery according to claim 9, wherein: The method of providing a through hole on the negative electrode tab comprises: When a through hole is formed on the negative electrode tab, the insulating material at the through hole is removed and the conductive network at the through hole is retained.

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