Energy storage battery easy to recycle

Abstract

According to the energy storage battery easy to recycle, the shell is provided with the first injection and discharge port and the second injection and discharge port, cleaning agents can be injected into the energy storage battery through the injection and discharge ports, and electrolyte in the energy storage battery is discharged so as to be recycled. A plurality of positive plates and a plurality of negative plates of each battery cell unit of the battery cell are overlapped in a crossed manner, and the long-strip-shaped diaphragm is arranged between the positive plates and the negative plates in a zigzag bending manner. And each battery cell unit is provided with a positive plate group traction clamping part and a negative plate group traction clamping part. In the recycling process, gaps are generated between the electrode plates in the battery cell units by pulling the two end parts of the diaphragm, and then a plurality of positive plates in groups and a plurality of negative plates in groups to be recycled can be conveniently obtained at the same time by simultaneously clamping and pulling the positive plate group pulling and clamping part and the negative plate group pulling and clamping part. According to the energy storage battery disclosed by the utility model, high-value materials can be recycled in a convenient, quick and pollution-free manner.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to an easily recyclable energy storage battery. Background Art

[0002] Lithium-ion batteries are widely used in electric vehicles, energy storage systems and other fields due to their high energy density, long cycle life and good safety performance. However, with the rapid development of electric vehicles and energy storage systems, the issue of battery recycling and reuse after the end of their life has become increasingly prominent. Due to the limitations of battery design, structure, preparation process, preparation materials, etc., the recycling process of batteries from shells, electrolytes, current collectors to electrode active materials is complicated, the recycling cost is high, and it is easy to cause secondary pollution. Utility Model Content

[0003] In view of the above problems, the utility model provides an energy storage battery that is easy to recycle. A first injection and discharge port and a second injection and discharge port are provided on the shell of the energy storage battery. A cleaning agent can be injected into the energy storage battery through the first injection and discharge port, and the electrolyte in the energy storage battery can be discharged through the second injection and discharge port for recycling. A plurality of positive electrode sheets and a plurality of negative electrode sheets of each cell unit of the battery are cross-stacked, and a long strip diaphragm is arranged between the plurality of positive electrode sheets and the plurality of negative electrode sheets in a zigzag bending manner. All the positive electrode sheets of each cell unit are provided with a positive electrode sheet group pulling and clamping part for simultaneously pulling and clamping all the positive electrode sheets, and all the negative electrode sheets are provided with a negative electrode sheet group pulling and clamping part for simultaneously pulling and clamping all the negative electrode sheets. In the recycling process, gaps are generated between the electrode sheets in the cell unit by pulling the two ends of the diaphragm, and then by simultaneously clamping and pulling the positive electrode sheet group pulling and clamping part and the negative electrode sheet group pulling and clamping part, it is convenient to simultaneously obtain a plurality of positive electrode sheets and a plurality of negative electrode sheets to be recycled. The energy storage battery of the utility model can realize the recycling of high-value materials in a convenient, fast and pollution-free manner.

[0004] The technical solution provided by the utility model is as follows:

[0005] According to the utility model, an easily recyclable energy storage battery is provided, and the energy storage battery includes a shell and a battery cell. A first injection and discharge port for injecting and discharging fluid and a second injection and discharge port for injecting and discharging fluid are provided on the shell, and when the battery is recycled, a cleaning agent is injected into the energy storage battery through the first injection and discharge port, and the electrolyte in the energy storage battery is discharged through the second injection and discharge port to obtain the electrolyte to be recycled. The battery cell includes a plurality of battery cell units, and each battery cell unit includes a plurality of positive electrode sheets, a plurality of negative electrode sheets and a diaphragm. Each positive electrode sheet is provided with a positive electrode tab and a positive electrode current collector, and a positive electrode active material layer containing an aqueous adhesive is coated on both sides of the positive electrode current collector, and each negative electrode sheet is provided with a negative electrode tab and a negative electrode current collector, and a negative electrode active material layer containing an aqueous adhesive is coated on both sides of the negative electrode current collector. A plurality of positive electrode sheets and a plurality of negative electrode sheets are cross-stacked, the positive electrode tabs of the plurality of positive electrode sheets are at least partially connected together to form a positive electrode sheet group pulling and clamping portion and are located on one side of the battery cell unit, and the negative electrode tabs of the plurality of negative electrode sheets are at least partially connected together to form a negative electrode sheet group pulling and clamping portion and are located on the opposite side of the battery cell unit. A long strip of diaphragm is arranged in a zigzag shape between the cross-stacked positive electrode sheets and the negative electrode sheets, and by pulling the two ends of the zigzag-shaped diaphragm, the mutually stacked positive electrode sheets and the plurality of negative electrode sheets of the battery cell unit can be loosened. By pulling and clamping the positive electrode sheet group pulling and clamping portion of the plurality of positive electrode sheets and the negative electrode sheet group pulling and clamping portion of the plurality of negative electrode sheets, the plurality of positive electrode sheets and the plurality of negative electrode sheets can be separated at the same time, thereby obtaining a plurality of positive electrode sheets and a plurality of negative electrode sheets to be recycled.

[0006] The energy storage battery is a large-scale laminated battery, and a first injection and discharge port for fluid injection and discharge and a second injection and discharge port for fluid injection and discharge are provided on the battery shell. When the battery is recycled, the electrolyte in the battery can be recovered without damaging the battery shell. Preferably, a cleaning agent can be injected into the battery through the first injection and discharge port, and the electrolyte in the battery can be discharged and collected through the second injection and discharge port. The cleaning agent can be one or more of dimethyl carbonate, diethyl carbonate and alkaline saline solution. Through the injection and discharge port structure of the battery, the electrolyte can be collected and recovered without volatilizing and polluting the environment, and by using it in combination with the cleaning agent, there is basically no organic solvent and fluorine and lithium residue when the battery shell is disassembled, making the disassembly and recycling process more environmentally friendly and safe.

[0007] The material of the shell is a polymer material that is not corroded and dissolved by the electrolyte, and the polymer material may be polypropylene, polyethylene, polyphenylene sulfide or polytetrafluoroethylene, etc. The shell can be broken by one or more methods of extrusion, cutting or injecting gas into the battery so as to separate the shell from the battery cell, thereby obtaining a shell to be recycled. Since the shell is made of polymer material, in addition to the traditional cutting and breaking method, it can also be flexibly broken by methods such as extrusion. When extruding and breaking the shell, a weak part can be formed on the shell in advance by cutting, hot melting, etc., so that it is easier to break the shell at the weak part during extrusion. In addition, since an injection and discharge port is provided on the shell, the shell can be directly broken without other auxiliary cutting and extrusion devices, that is, after the electrolyte in the shell is discharged, gas is injected into the shell through the first injection and discharge port, the second injection and discharge port is closed, and the shell is blasted by air pressure. In this way, multiple batteries can be processed at one time, so that the shell can be broken in a simple, fast, low-cost and no additional equipment method.

[0008] The battery cell of the battery may include multiple battery cell units, and the structures of the multiple battery cell units may be the same. Each battery cell unit includes multiple positive electrode sheets, multiple negative electrode sheets and a separator, and the positive electrode sheets and the negative electrode sheets are cross-stacked. The long strip separator is wound between the positive electrode sheet and the negative electrode sheet in a zigzag shape. The material of the separator may be a single-layer or multi-layer composite separator such as polypropylene, polyethylene, polyethylene terephthalate, or an organic / inorganic composite separator coated with inorganic materials (such as Al2O3, SiO2 and other particles) on a polyolefin film or non-woven fabric, and the tensile strength of the separator may be 7 to 30 MPa. In a preferred embodiment, the separator may include a zigzag portion and a wrapping portion. The zigzag portion is used to isolate the positive electrode sheet and the negative electrode sheet of the battery cell unit, and the wrapping portion extends from one end or both ends of the zigzag portion and wraps around the outside of the battery cell unit to protect the battery cell unit, and the wrapped battery cell unit is easier to carry as a whole.

[0009] Preferably, the length of the positive electrode sheet is about 200-1200 mm, the width is about 100-500 mm, and the thickness is about 0.4-3.5 mm. The length of the negative electrode sheet is about 200-1200 mm, the width is about 100-500 mm, and the thickness is about 0.2-1.5 mm. The positive electrode active material layer contains a positive electrode active material, a conductive agent, and an aqueous adhesive. The mass ratio of the positive electrode active material, the conductive agent, and the aqueous adhesive can be 90-98:0.5-5:0.5-5. The negative electrode active material layer contains a negative electrode active material, a conductive agent, and an aqueous adhesive. The mass ratio of the negative electrode active material, the conductive agent, and the aqueous adhesive of the negative electrode active material layer can be 90-98:0.5-5:0.5-5. The positive electrode active material may be one or more of lithium iron phosphate, lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium vanadium oxide, vanadium oxide, lithium manganese-based oxide (lithium manganese chromium oxide, lithium manganese cobalt oxide, lithium manganese nickel oxide, lithium manganese copper oxide), V[LiM]O4 (M = nickel or cobalt), polyatomic anion positive electrode materials (VOPO4, NASICON, silicates, titanates, sulfates, borates, R-Li3Fe2(PO4)3, Li3FeV(PO4)3, TiNb(PO4)3, LiFeNb(PO4)3), iron compounds, molybdenum oxides, etc. The negative electrode active material may be a carbon-based negative electrode material, nitride, silicon and silicide, tin-based oxide, selenide, alloy negative electrode material, titanium oxide, transition metal oxide, phosphide or metallic lithium, etc. Carbon-based negative electrode materials include one or more of graphite, mesophase carbon microspheres, graphitized carbon fibers, amorphous carbon materials, soft carbon, hard carbon, fullerenes, carbon nanotubes, carbon-cobalt composites, carbon-tin composites, and carbon-silicon composites; alloy-based negative electrode materials include one or more of tin-based alloys, silicon-based alloys, antimony-based alloys, germanium-based alloys, aluminum-based alloys, and lead-based alloys; transition metal oxides include one or more of cobalt oxides, nickel oxides, copper oxides, iron oxides, chromium oxides, and manganese oxides. The conductive agent may be one or more of carbon black, graphene, carbon nanotubes, carbon fibers, amorphous carbon, metal conductive particles, and metal conductive fibers. The material of the metal conductive particles or fibers may be aluminum, stainless steel, or silver. The aqueous adhesive may be SA (sodium alginate), PVA (polyvinyl alcohol), PMMA (polymethyl methacrylate), HNBR (hydrogenated nitrile rubber), PTFE (polytetrafluoroethylene), PAA (polyacrylic acid), acrylate or polyacrylonitrile copolymers, and the like. The positive electrode current collector and the negative electrode current collector may be a porous metal mesh, preferably a porous stainless steel mesh.

[0010] Since the electrode active material layer uses an aqueous adhesive, there is no need for acid washing, alkali washing or mechanical crushing. The positive electrode active material and conductive agent of the positive electrode sheet and the negative electrode active material and conductive agent of the negative electrode sheet can be recovered quickly and pollution-free by directly washing with water. Moreover, the positive electrode collector and the negative electrode collector can also be completely recovered without being corroded or damaged. For example, by simultaneously washing multiple positive electrode sheets by spraying water, immersing in a water tank with ultrasonic vibration, or immersing in a water tank with shaking of the electrode sheet (positive electrode sheet or negative electrode sheet), a slurry of positive electrode active material and multiple positive electrode collectors can be obtained. By simultaneously washing multiple negative electrode sheets by spraying water, immersing in a water tank with ultrasonic vibration, or immersing in a water tank with shaking of the electrode sheet (positive electrode sheet or negative electrode sheet), a slurry of negative electrode active material and multiple negative electrode collectors can be obtained.

[0011] In order to recycle the positive electrode sheet and the negative electrode sheet separately, it is usually necessary to peel off the multi-layer electrode sheets in the battery cell layer by layer so as to obtain the positive electrode sheet and the negative electrode sheet respectively. According to the utility model, before washing the positive electrode sheet to recover the positive electrode active material and washing the negative electrode sheet to recover the negative electrode active material, it is not necessary to separate and disassemble the multiple positive electrode sheets and the multiple negative electrode sheets of the battery cell unit one by one. In each battery cell unit, the positive electrode tabs of all the positive electrode sheets are at least partially connected together to form a positive electrode sheet group pulling clamping part, and the negative electrode tabs of all the negative electrode sheets are at least partially connected together to form a negative electrode sheet group pulling clamping part. In order to form the positive electrode sheet group pulling clamping part and the negative electrode sheet group pulling clamping part, the connection method of the positive electrode tab and the connection method of the negative electrode tab can be welding, gluing, wrapping fixation, folding fixation and the like. In each battery cell unit, the positive electrode sheet group pulling clamping part and the negative electrode sheet group pulling clamping part are respectively located on opposite sides of the battery cell unit. When separating the positive electrode sheets and the negative electrode sheets, it is only necessary to simultaneously clamp the positive electrode sheet group pulling clamping part and the negative electrode sheet group pulling clamping part and pull them in opposite directions to obtain the grouped positive electrode sheets and the grouped negative electrode sheets in the battery cell unit. Before or while pulling the positive electrode sheet group and the negative electrode sheet group, a gap can be generated between the stacked positive electrode sheets and the negative electrode sheets by pulling the two ends of the long strip separator, thereby making it easier to separate the grouped positive electrode sheets from the grouped negative electrode sheets. By using the positive electrode sheet group pulling and clamping parts and the negative electrode sheet group pulling and clamping parts, not only can multiple positive electrode sheets be quickly separated from multiple negative electrode sheets, but also when washing and recovering the electrode active materials, the positive electrode sheets and the negative electrode sheets can be suspended by clamping the positive electrode sheet group pulling and clamping parts and the negative electrode sheet group pulling and clamping parts, so that the positive electrode active materials of the positive electrode sheets and the negative electrode active materials of the negative electrode sheets can be quickly dropped from the gaps between the electrode sheets, so that the electrode active materials of the electrode sheets can be recovered quickly and easily at the same time. Preferably, the length of the positive electrode sheet group pulling and clamping parts is 15 to 1200 mm, the width is 5 to 30 mm, and the length of the negative electrode sheet group pulling and clamping parts is 15 to 1200 mm, the width is 5 to 30 mm. The electrode group pulling and clamping part can be the same length as the electrode sheet, or it can be a plurality of mutually disconnected separate pulling and clamping parts distributed along the length direction of the electrode sheet, and the length of each separate pulling and clamping part is 1 / 5 to 1 / 2 of the length of the electrode sheet. When the electrode group pulling and clamping part is a plurality of mutually disconnected separate pulling and clamping parts, it is convenient to perform segmented shaking of the electrode sheet when the positive electrode sheet and the negative electrode sheet are pulled in reverse to separate, which is conducive to the rapid separation of the electrode sheet.

[0012] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0013] The advantages of the utility model are:

[0014] 1) The electrolyte can be recovered before the battery shell is disassembled to avoid electrolyte volatilization and contamination after the shell is disassembled;

[0015] 2) The battery structure, i.e. the material, is easy to disassemble, and the battery casing can be removed easily and quickly;

[0016] 3) The zigzag-shaped long strip separator and the electrode group pulling and clamping part can quickly separate the group of positive electrode sheets from the group of negative electrode sheets, and during the water washing process of the electrode sheets, the electrode group can be in a suspended lower open state by clamping the electrode group pulling and clamping part, so that the electrode active materials of the group of electrode sheets can be quickly and completely detached;

[0017] 4) Impurity-free electrode active materials can be obtained by simple water washing, which can be reused in new battery manufacturing after repair and regeneration. The water washing green recycling technology can greatly increase the residual value of battery recycling, realize green recycling of energy storage batteries after scrapping, and reduce environmental load;

[0018] 5) A complete current collector can be obtained, realizing the recycling of high-value materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1(a)-Figure 1(b) It is a front perspective view and a rear perspective view of the energy storage battery;

[0020] Figure 2 is a cross-sectional schematic diagram of an energy storage battery;

[0021] Figure 3 is a schematic diagram of a battery cell unit of an energy storage battery according to one embodiment;

[0022] Figure 4 It is a schematic diagram of a battery cell unit of an energy storage battery according to another embodiment.

[0023] Reference numerals list

[0024] 1——Housing

[0025] 2——First injection port

[0026] 3——Second injection port

[0027] 4——Battery cell unit

[0028] 5——Positive electrode ear

[0029] 6——Negative electrode tab

[0030] 7——Positive electrode

[0031] 8——Negative electrode

[0032] 9 - Diaphragm

[0033] 901——Zigzag section

[0034] 902——Wrapping part

[0035] 10——Positive electrode group pulling and clamping part

[0036] 11——Negative electrode group pulling and clamping part DETAILED DESCRIPTION

[0037] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0038] Figure 1(a)-Figure 1(b) Figure 1 is a front stereogram and a rear stereogram of an energy storage battery. The energy storage battery is a large horizontal laminated battery. Figure 1(a) is a front stereogram of an energy storage battery. As can be seen from the figure, a first injection and discharge port 2 for injecting gas or liquid into the battery is provided on the battery housing 1. Figure 1(b) is a rear stereogram of an energy storage battery. As can be seen from the figure, a second injection and discharge port 3 for discharging gas or liquid from the battery is also provided on the battery housing 1.

[0039] In the process of recovering the electrolyte, a cleaning agent can be injected into the battery through the first injection and discharge port 2, and the electrolyte to be recovered can be discharged from the second injection and discharge port 3. In the process of breaking the battery shell, gas can also be injected into the battery through the first injection and discharge port 2, the second injection and discharge port 3 is closed, and the shell 1 made of polymer material is broken by the internal gas pressure of the battery.

[0040] Figure 2 It is a cross-sectional schematic diagram of the energy storage battery. Figure 2 As can be seen in the figure, the energy storage battery includes a shell 1 and a battery cell, and the battery cell is placed in the shell 1. The battery cell includes a plurality of battery cell units 4, and the plurality of battery cell units 4 are stacked up and down. A plurality of positive electrode sheets and a plurality of negative electrode sheets are arranged horizontally in the battery cell unit 4. All positive electrode tabs 5 of each battery cell unit 4 are located on one side of the battery cell unit, and all negative electrode tabs 6 of each battery cell unit 4 are located on the opposite side of the battery cell unit.

[0041] Figure 3The schematic diagram of the battery cell unit of the energy storage battery. Each battery cell unit includes a plurality of positive electrode sheets 7, a plurality of negative electrode sheets 8 and a separator 9. The positive electrode sheets 7 and the negative electrode sheets 8 are cross-stacked, and the long strip separator 9 is wound in a zigzag shape and placed between the positive electrode sheets 7 and the negative electrode sheets 8. The positive electrode tabs 5 of the plurality of positive electrode sheets 7 are at least partially connected together to form a positive electrode sheet group pulling and clamping portion 10, and the connection of the positive electrode sheet group pulling and clamping portion 10 enables the plurality of positive electrode sheets 7 in the battery cell unit to form a group of connected positive electrode sheets; the negative electrode tabs 6 of the plurality of negative electrode sheets 8 are at least partially connected together to form a negative electrode sheet group pulling and clamping portion 11, and the connection of the negative electrode sheet group pulling and clamping portion 11 enables the plurality of negative electrode sheets 8 in the battery cell unit to form a group of connected negative electrode sheets. The positive electrode sheet group pulling and clamping portion 10 and the negative electrode sheet group pulling and clamping portion 11 are respectively located on opposite sides of the battery cell unit. When the two ends of the separator 9 are pulled, a gap is generated between the adjacent positive electrode sheets 7 and negative electrode sheets 8, causing the positive electrode sheets 7 and negative electrode sheets 8 to become loose. When the positive electrode sheet group pulling clamping portion 10 and the negative electrode sheet group pulling clamping portion 11 are pulled at the same time, the grouped positive electrode sheets 7 and the grouped negative electrode sheets 8 in the battery cell unit can be quickly separated.

[0042] Figure 4 FIG. 1 is a schematic diagram of a battery cell unit of an energy storage battery according to another embodiment. Figure 4 In the illustrated embodiment, the elongated diaphragm comprises a zigzag portion 901 and a wrapping portion 902. The zigzag portion 901 is wound between the positive electrode sheet 7 and the negative electrode sheet 8, for isolating the positive electrode sheet 7 and the negative electrode sheet 8. The wrapping portion 902 is integrated with the zigzag portion 901, extends from the zigzag portion 901 and wraps around the outside of the battery cell unit, and the wrapping portion 902 can protect the battery cell unit, and the wrapped battery cell unit is easier to carry as a whole. When the diaphragm has the wrapping portion 902, the wrapping portion 902 can be disassembled when the battery cell unit is removed, exposing the end of the zigzag portion 901, and then pulling the two ends of the elongated diaphragm--one end of the wrapping portion 902 and one end of the zigzag portion 901, thereby forming a looseness between the positive electrode sheet 7 and the negative electrode sheet 8.

[0043] The energy storage battery according to the utility model can realize green recycling of the battery in a simple and low-cost manner, greatly improving the residual value of battery recycling. For example, for scrapped energy storage batteries, a cleaning agent can be first injected into the battery through the first injection and discharge port 2 on the battery shell, and the electrolyte in the battery can be discharged through the second injection and discharge port 3 on the battery shell to obtain the electrolyte to be recycled. After that, gas can be injected into the battery through the first injection and discharge port 2 to discharge the liquid in the shell. After emptying the liquid in the battery shell, gas can continue to be injected into the battery through the first injection and discharge port 2, and the second injection and discharge port 3 can be closed. The battery shell made of polymer material can be broken by using the increased air pressure in the battery, and the battery cell can be taken out from the shell to obtain the shell to be recycled. Next, the cell unit is processed. The positive electrode sheet 7 and the negative electrode sheet 8 are loosened by pulling the two ends of the separator 9 of the cell unit. Then, the positive electrode sheet group pulling clamping part 10 and the negative electrode sheet group pulling clamping part 11 of the cell unit are clamped and pulled to separate the grouped positive electrode sheets 7 from the grouped negative electrode sheets 8, so as to obtain the positive electrode sheets 7 and negative electrode sheets 8 to be recycled. The positive electrode sheet group pulling clamping part 10 is clamped so that the grouped positive electrode sheets 7 are opened at the bottom in a suspended manner. The grouped positive electrode sheets 7 are washed at the same time by water to obtain the slurry of positive active materials and positive current collectors; the negative electrode sheet group pulling clamping part 11 is clamped so that the grouped negative electrode sheets 8 are opened at the bottom in a suspended manner. The grouped negative electrode sheets 8 are washed at the same time by water to obtain the slurry of negative active materials and negative current collectors. The energy storage battery has a high residual value, is environmentally friendly, and has a simple and easy recycling method.

[0044] The specific embodiments of the utility model are not intended to limit the utility model. Any technician familiar with the field can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. An easily recyclable energy storage battery, characterized in that: The energy storage battery comprises a shell and a battery cell, wherein a first injection and discharge port for injecting and discharging fluid and a second injection and discharge port for injecting and discharging fluid are provided on the shell, and when the battery is recycled, a cleaning agent is injected into the energy storage battery via the first injection and discharge port, and the electrolyte in the energy storage battery is discharged via the second injection and discharge port to obtain the electrolyte to be recycled, the battery cell comprises a plurality of battery cell units, each of the battery cell units comprises a plurality of positive electrode sheets, a plurality of negative electrode sheets and a separator, each of the positive electrode sheets is provided with a positive electrode tab and a positive electrode current collector, and a positive electrode active material layer containing an aqueous adhesive is coated on both sides of the positive electrode current collector, each of the negative electrode sheets is provided with a negative electrode tab and a negative electrode current collector, and a negative electrode active material layer containing an aqueous adhesive is coated on both sides of the negative electrode current collector, and the plurality of positive electrode sheets are cross-stacked with the plurality of negative electrode sheets, The positive electrode tabs of the multiple positive electrode sheets are at least partially connected together to form a positive electrode sheet group pulling and clamping part and are located on one side of the battery cell unit. The negative electrode tabs of the multiple negative electrode sheets are at least partially connected together to form a negative electrode sheet group pulling and clamping part and are located on the opposite side of the battery cell unit. The long strip-shaped separator is arranged in a zigzag shape between the cross-stacked positive electrode sheets and the negative electrode sheets. By pulling the two ends of the zigzag-shaped separator, the multiple positive electrode sheets and the multiple negative electrode sheets stacked on each other of the battery cell unit can be loosened. By pulling and clamping the positive electrode sheet group pulling and clamping part of the multiple positive electrode sheets and the negative electrode group pulling and clamping part of the multiple negative electrode sheets, the multiple positive electrode sheets and the multiple negative electrode sheets can be separated at the same time, thereby obtaining a plurality of positive electrode sheets and a plurality of negative electrode sheets to be recycled.

2. The easily recyclable energy storage battery according to claim 1, characterized in that: The shell is made of a polymer material that is not corroded or dissolved by the electrolyte, and the polymer material is polypropylene, polyethylene, polyphenylene sulfide or polytetrafluoroethylene.

3. The easily recyclable energy storage battery according to claim 1, characterized in that: The length of the positive electrode sheet is 200-1200 mm, the width is 100-500 mm, and the thickness is 0.4-3.5 mm. The length of the negative electrode sheet is 200-1200 mm, the width is 100-500 mm, and the thickness is 0.2-1.5 mm.

4. The easily recyclable energy storage battery according to claim 1, characterized in that: The diaphragm is a single-layer or multi-layer composite diaphragm of polypropylene, polyethylene, or polyethylene terephthalate, or an organic / inorganic composite diaphragm in which an inorganic material is coated on a polyolefin film or non-woven fabric.

5. The easily recyclable energy storage battery according to claim 4, characterized in that: The tensile strength of the diaphragm is 7-30 MPa.

6. The easily recyclable energy storage battery according to claim 1, characterized in that: The diaphragm includes a zigzag portion and a wrapping portion, wherein the zigzag portion is used to isolate the positive electrode sheet and the negative electrode sheet of the battery cell unit, and the wrapping portion extends from the zigzag portion and wraps around the outside of the battery cell unit to protect the battery cell unit.

7. The easily recyclable energy storage battery according to claim 1, characterized in that: The length of the pulling and supporting part of the positive electrode sheet group is 15 to 1200 mm, and the width is 5 to 30 mm. The length of the pulling and supporting part of the negative electrode sheet group is 15 to 1200 mm, and the width is 5 to 30 mm.

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