Cylindrical lithium ion integrated battery production method and cylindrical lithium ion integrated battery

Abstract

The invention discloses a production method of a cylindrical lithium ion integrated battery. The production method comprises the following steps: placing a circular positive aluminum plate at the bottom of the inner side of a sealing ring, placing a positive ring at the edge of the inner side of the sealing ring, contacting the positive ring with the positive aluminum plate, and placing a plastic film insulating layer at the inner side of the positive ring; the protection circuit board is placed above the plastic film insulating layer, the protection circuit board is welded to the positive electrode ring, the negative electrode ring is welded to the outer edge of the upper end of the protection circuit board, the current interruption device is welded to the outer side of the positive electrode aluminum plate, and an integrated cap is obtained; preparing a positive electrode and a negative electrode, coating, rolling, slitting, flaking and winding to form a winding core; loading the roll core into a steel shell, welding a negative pole lug of the roll core with the bottom of the inner side of the steel shell, and channeling the steel shell to obtain a battery cell; performing high-vacuum baking on the battery cell, injecting electrolyte, and performing formation treatment; the positive pole lug of the roll core is welded with the current interruption device in the cap; the integrated cover cap and the steel shell are sealed; carrying out cleaning and anti-rust treatment on the battery cell; and carrying out capacity grading treatment on the battery cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylindrical lithium battery, in particular to a cylindrical lithium ion integrated battery production method and a cylindrical lithium ion integrated battery. BACKGROUND

[0002] In the development of modernization, batteries are more and more widely used in various electrical appliances, and people's performance requirements for batteries are also higher and higher. Lithium ion battery is a kind of power storage device, which mainly uses lithium metal or lithium alloy metal as negative electrode material, and charges and discharges through chemical reaction. The cylindrical lithium ion battery is a kind of battery similar to the common dry battery. The lithium battery is a non-disposable battery, which can be repeatedly charged and discharged.

[0003] In the existing production process of cylindrical lithium ion integrated battery, the circuit board installation, welding and testing are carried out separately, which leads to long process chain, and the transfer and repeated positioning between processes cause yield loss. At the same time, the activation and formation steps in the battery preparation process are complex and time-consuming, which reduces the production efficiency. SUMMARY

[0004] Based on the above status, the main purpose of the present application is to provide a cylindrical lithium ion integrated battery production method, which carries out formation treatment on the battery cell before welding the integrated cap with the battery cell, without the need for activation treatment on the battery cell, saving the activation step and shortening the production process. The production efficiency is improved.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: A cylindrical lithium ion integrated battery production method, comprising: Step one, place the circular positive aluminum plate on the bottom of the sealing ring inside, place the positive ring on the edge of the sealing ring inside, the positive ring is in contact with the positive aluminum plate, and the plastic film insulation layer is placed on the inside of the positive ring and adjacent to the positive aluminum plate; Step two, place the protection circuit board above the plastic film insulation layer, weld the protection circuit board with the positive ring, weld the negative ring on the outer edge of the upper end of the protection circuit board, and weld the current interrupting device on the outside of the positive aluminum plate, the outside is the side of the positive aluminum plate facing the roll core, to obtain an integrated cap; Step three, positive and negative electrode ingredients, coating, rolling, striping, sheet making and winding to form a roll core; Step four, put the roll core into the steel shell, weld the negative electrode lug of the roll core with the bottom inside of the steel shell, and roll the steel shell to obtain a battery cell; Step five, high vacuum baking of the battery cell; Step six, injecting electrolyte into the battery cell; Step seven, performing formation treatment on the battery cell to charge the battery cell voltage to a first voltage; Step eight, welding the positive tab of the roll core with the current interruption device in the integrated cap to obtain a battery cell connected with the integrated cap; Step nine, screening out the battery cell with a voltage lower than the lower limit voltage of the protection circuit board; Step ten, sealing the integrated cap with the steel shell; Step eleven, performing cleaning and rust prevention treatment on the battery cell; Step twelve, adding a plastic outer film to the outside of the battery cell; Step thirteen, performing capacity grading treatment on the battery cell to obtain cylindrical lithium ion integrated batteries with different capacities.

[0006] Preferably, by controlling the thickness of the positive ring in the longitudinal direction, the short circuit between the components on the protection circuit board and the positive aluminum plate is prevented, and by controlling the inner diameter of the positive ring, the short circuit between the positive ring and the electronic components on the protection circuit board is prevented.

[0007] Preferably, the protection circuit board has an input face and an output face, The output face is the face of the protection circuit board with the positive output of the cylindrical lithium ion integrated battery, and the input face is the other face opposite to the output face; The protection circuit board is arranged inside the positive ring, and the input face of the protection circuit board faces the plastic film insulation layer, and the negative ring is welded to the output face of the protection circuit board.

[0008] Preferably, the positive roll pressure coating surface density after the positive and negative roll pressure in step three is a first density, and the negative roll pressure coating surface density is a second density.

[0009] Preferably, the positive and negative strip width after the positive and negative strip in step three is a first width, and the negative strip width is a second width.

[0010] Preferably, the positive and negative winding in step three includes: Winding the separator, the electrode piece glue and the positive and negative electrodes obtained in step five to form the roll core, and the winding environment has a relative humidity of less than or equal to 30% RH and a temperature of 20-30°C.

[0011] Preferably, the step five includes: placing the battery cell in a high-vacuum oven, setting the temperature to a first temperature, setting the vacuum value to a first vacuum value, performing vacuum baking on the battery cell for a first preset time, then performing nitrogen baking on the battery cell for a second preset time, and repeating the baking for a preset number of times.

[0012] Preferably, the step seven comprises: charging the battery cell with the first preset current value and the first preset voltage value for a third preset time; charging the battery cell with the second preset current value and the second preset voltage value for a fourth preset time; checking whether the voltage of the cylindrical lithium ion integrated battery is the first voltage, and if yes, judging that the cylindrical lithium ion integrated battery meets the requirements, and screening the cylindrical lithium ion integrated battery.

[0013] Preferably, in the step eight, the positive electrode tab of the winding core is welded with the current interruption device in the integrated cap, and the winding core stores electricity.

[0014] The application further discloses a cylindrical lithium ion integrated battery prepared by the method.

[0015] The cylindrical lithium ion integrated battery production method of the application performs formation treatment on the battery cell before welding the integrated cap with the battery cell, and does not need to perform activation treatment on the battery cell, thereby omitting the activation step, shortening the production procedure, and improving the production efficiency.

[0016] Other beneficial effects of the application will be described in the specific embodiments by introducing specific technical features and technical solutions, and those skilled in the art should understand the beneficial technical effects brought by the technical features and technical solutions through the introduction. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiment of the cylindrical lithium ion integrated battery production method according to the application will be described below with reference to the accompanying drawings. In the drawings: Figure 1 It is a schematic diagram of the cylindrical lithium ion integrated battery production method according to a preferred embodiment of the application; Figure 2 It is a schematic diagram of the integrated cap structure according to a preferred embodiment of the application; Figure 3 It is a schematic diagram of the thickness and inner diameter of the positive electrode ring in the longitudinal direction of the integrated cap according to a preferred embodiment of the application; Figure 4 It is a schematic diagram of the formation of the battery cell according to a preferred embodiment of the application. DETAILED DESCRIPTION

[0018] In order to provide a more detailed description of the technical solution of the present application and to facilitate a further understanding of the present application, the specific implementation methods of the present application are described below in conjunction with the accompanying drawings. However, it should be understood that all illustrative embodiments and their descriptions are used to explain the present application and do not constitute the sole limitation of the present application.

[0019] Figure 1 This is a schematic diagram of a method for producing a cylindrical lithium-ion integrated battery according to a preferred embodiment of the present invention, comprising: Step 1: Place the circular positive aluminum plate at the bottom inside the sealing ring, place the positive ring on the inner edge of the sealing ring, the positive ring is in contact with the positive aluminum plate, and place the plastic film insulation layer inside the positive ring and adjacent to the positive aluminum plate.

[0020] Step 2: Place a protective circuit board on top of the plastic film insulation layer and weld it to the positive electrode ring. Weld the negative electrode ring to the outer edge of the protective circuit board. Weld a current interrupt device (CID) to the outer side of the positive aluminum plate (the outer side facing the winding core), forming an integrated cap. Specifically, the protective circuit board is used to control the battery from overcharging during charging and overdischarging during discharging.

[0021] In a specific embodiment, ultrasonic welding can be used to weld the protection circuit board to the positive electrode ring, as well as to weld the protection circuit board to the negative electrode ring. In the event of overheating, short circuiting, or overcharging of the CID, a large amount of gas will be generated within the cell. When the pressure increases to a certain level (e.g., 1.4±0.2MPa for a cylindrical 14500 battery), the welds between the aluminum plate and the CID pressure relief plate will separate, causing the pressure relief plate to flip, automatically severing the positive electrode lead, preventing electrolyte leakage and ultimately disconnecting the cell internally, thereby achieving a protective effect.

[0022] Step 3: Positive and negative electrode ingredients are prepared, coated, rolled, slit, sheeted, and wound to form a core.

[0023] Step 4: Place the core into the steel shell, weld the negative electrode tab of the core to the inner bottom of the steel shell, and groove the steel shell. In a specific embodiment, the grooving speed can be 30-35 mm / s, and the downward pressure can be 0.4 MPa.

[0024] Step 5: Bake the battery cell under high vacuum.

[0025] Step 6: Inject electrolyte into the battery cell.

[0026] Step 7: Performing a formation treatment on the battery cell to charge the battery cell voltage to a first voltage.

[0027] Step 8: Weld the positive electrode tab of the winding core to the current interruption device in the integrated cap to obtain a battery cell connected to the integrated cap.

[0028] Step 9: Screen out cells whose cell voltage is lower than the lower limit voltage of the protection circuit board. In a specific embodiment, the lower limit voltage of the protection circuit board may be 3.0V.

[0029] Step 10: Seal the integrated cap and the steel shell.

[0030] Step 11: Clean and rust-proof the battery cells.

[0031] Step 12: Add a plastic outer film to the outside of the battery cell.

[0032] Step 13: Perform capacity separation on the battery cells to obtain cylindrical lithium-ion integrated batteries of different capacities.

[0033] The present invention's method for producing cylindrical integrated lithium-ion batteries performs a formation treatment on the battery cell before welding the integrated cap to the cell, eliminating the need for activation and thus shortening the production process. This improves production efficiency. Furthermore, by employing an integrated cap, a protective circuit board, current interruption device, and other components are incorporated into the cylindrical lithium-ion cell, resolving the issues inherent in the prior art of separating the packing process from cell manufacturing. Furthermore, the method provides protection for battery charging and discharging, improving battery safety.

[0034] In a specific embodiment, the relative humidity of the environment in steps 4 to 10 may be 1% RH.

[0035] like Figure 2 Figure 2 shows a schematic diagram of a preferred integrated cap structure of the present invention, which includes a sealing ring 1, a positive aluminum plate 2, a positive electrode ring 3, a plastic film insulation layer 4, a protective circuit board 5, a negative electrode ring 6, and a current interrupter 7. The protective circuit board 5 is welded to the positive electrode ring 3, which contacts the positive aluminum plate 2. The protective circuit board 5 is welded to the negative electrode ring 6. The protective circuit board includes an IC circuit 9. 8 is a metal post welded to the protective circuit board 5, which serves as the positive output of the battery.

[0036] In a specific embodiment, the plastic film insulation layer in the integrated cap prevents the IC circuit system components from short-circuiting with the positive aluminum plate. In the conventional technology, AB insulation glue is mixed and used as the insulation layer. The AB insulation glue is liquid and needs to be baked. At the same time, due to the inconsistent thickness of the AB insulation glue, some of the AB insulation glue may not be baked. In the vacuum baking process of the battery cell, the liquid AB insulation glue may be sprayed out, resulting in the scrapping of some battery cells. In the cylindrical lithium ion integrated battery production method of the present application, the plastic film insulation layer 4 is used, which reduces the baking process of the AB insulation glue in the conventional technology and avoids the spraying of the liquid AB insulation glue and the scrapping of the battery cells.

[0037] In a preferred embodiment, as shown in FIG. 8, by controlling the thickness h of the positive ring in the longitudinal direction, the short-circuiting between the components on the protection circuit board and the positive aluminum plate can be prevented. By controlling the inner diameter r of the positive ring, the short-circuiting between the positive ring and the electronic components on the protection circuit board can also be prevented. Figure 3

[0038] In a preferred embodiment, the protection circuit board has an input surface and an output surface. The output surface is the surface of the protection circuit board on which the positive output (for example, the hardware column 8 in FIG. 8) of the cylindrical lithium ion integrated battery is located, and the input surface is the surface opposite to the output surface (for example, the surface facing the plastic film insulation layer 4 in FIG. 8). The protection circuit board is arranged inside the positive ring, and the input surface of the protection circuit board faces the plastic film insulation layer. The negative ring is welded to the output surface of the protection circuit board. The negative ring is welded to the output surface of the protection circuit board, which can prevent the sealing edge from damaging or cracking the PCB board during the subsequent sealing, and the contact resistance is lower. Figure 2 Figure 2 In a specific embodiment, the positive ring can also serve as a positive temperature coefficient thermistor (PTC). When the charging current is greater than a preset value, the positive temperature coefficient thermistor controls the stop of charging. When the discharging current is greater than the preset value, for example, greater than 10A, the positive temperature coefficient thermistor controls the stop of discharging. The PTC thermistor is a typical semiconductor resistor with temperature sensitivity. When the temperature exceeds a certain value, the resistance value increases sharply with the increase of temperature. When the charging current or discharging current is too large, the temperature of the positive ring increases, and the resistance value increases sharply. The large resistance value will control the stop of charging or discharging.

[0039]

[0040] ​​​In the specific embodiment, the positive and negative electrode materials in step three include positive electrode materials and negative electrode materials. The positive electrode materials are obtained by mixing the pretreated positive electrode active material, binder, dispersant, conductive agent, solvent and other materials through a mixer and screening the large particles of the slurry. The negative electrode materials are obtained by mixing the pretreated negative electrode active material, binder, dispersant, conductive agent, solvent and other materials through a mixer and screening the large particles of the slurry.

[0041] In the specific embodiment, in step three, the surface temperature of the positive electrode coated electrode piece is 125-145°C (oil-based), the appearance of the positive electrode piece requires no missing material and no particles, the gap error is ±1mm (gap coating), the tailing error is less than 2mm (gap coating), and the total error of the electrode piece is ±1mm. The thickness of the electrode piece is measured within 5mm from both sides, the thickness error of the single-sided electrode piece in the transverse and longitudinal directions is ±2um, and the thickness error of the double-sided electrode piece in the transverse and longitudinal directions is ±3um. The surface temperature of the negative electrode coated electrode piece is 90-110°C (water-based), the appearance of the negative electrode piece requires no missing material and no particles, the gap error is ±1mm (gap coating), the tailing error is less than 2mm (gap coating), and the total error of the electrode piece is ±1mm. The thickness of the electrode piece is measured within 5mm from both sides, the thickness error of the single-sided electrode piece in the transverse and longitudinal directions is ±2um, and the thickness error of the double-sided electrode piece in the transverse and longitudinal directions is ±3um.

[0042] In a preferred embodiment, during the positive and negative electrode rolling process in step three, the coating surface density is a key process value. Specifically, the positive electrode rolling coating surface density needs to reach a first density, for example, 40.2±0.4mg / cm2, and the negative electrode rolling coating surface density needs to reach a second density, for example, 20±0.3mg / cm2. The first density and the second density can be set according to the design requirements of different batteries. At the same time, it is necessary to ensure that the surface of the electrode piece is free of brittle pieces, hard blocks, material falling or wavy edges, and that no fracture occurs at the gap. Rolling can make the surface of the electrode piece smooth and flat, reduce the volume of the electrode piece, improve the energy density, improve the electronic conductivity, and enhance the bonding strength of the coating material and the current collector.

[0043] In a preferred embodiment, in step three, the positive and negative electrode slitting respectively obtains positive electrode slitting and negative electrode slitting. Specifically, the positive electrode slitting width can be a first width, for example, 39.5±0.1mm, and the negative electrode slitting width can be a second width, for example, 40.5±0.1mm. The first width and the second width can be set according to the design requirements of different types of batteries. Through the slitting process, the battery can be cut into different widths and lengths according to the actual requirements to adapt to the requirements of different application scenarios.

[0044] In a preferred embodiment, the positive and negative electrode tabbing in step three includes welding the positive electrode tabs and the positive electrode tabbing tape, and welding the negative electrode tabs and the negative electrode tabbing tape, the positive and negative electrode tabs being aluminum strips or nickel-plated steel strips, and the tabbing tape including a positive tabbing tape and a negative tabbing tape.

[0045] In a preferred embodiment, the positive and negative electrode winding in step three includes winding the positive and negative electrode tabbing tape, the separator, and the electrode tabbing tape into a core, and detecting whether the core is short-circuited, the relative humidity of the environment being ≤30% RH, and the temperature being 20-30°C. Specifically, if the positive electrode tabbing tape has a width of 39.5±0.1 mm and the negative electrode tabbing tape has a width of 40.5±0.1 mm, the width of the separator can be 42.5 mm.

[0046] In a specific embodiment, the core upper end and the core lower end can be padded with PE pads before being loaded into the steel shell to prevent short-circuiting of the battery cell. The negative electrode tab can be welded to the bottom of the inner side of the steel shell using laser spot butt welding.

[0047] In a preferred embodiment, the high-vacuum baking of the battery cell in step five can include placing the battery cell in a high-vacuum oven, setting the temperature to a first temperature, setting the vacuum value to a first vacuum value, vacuum-baking the battery cell for a first preset time, nitrogen-baking the battery cell for a second preset time, and repeating the above steps for a preset number of times. Specifically, the first temperature can be 90°C, the first vacuum value can be 50 Pa, the first preset time can be 10 minutes, the second preset time can be 50 minutes, and the preset number of times can be 6. This step can reduce the moisture content in the battery cell and improve the performance of the finished battery cell.

[0048] In a preferred embodiment, step seven includes charging the battery cell at a first preset current value and a first preset voltage value for a third preset time, charging the battery cell at a second preset current value and a second preset voltage value for a fourth preset time, and detecting whether the voltage of the cylindrical lithium-ion integrated battery is the first voltage. If the voltage is the first voltage, the cylindrical lithium-ion integrated battery is determined to meet the requirements and is selected. Figure 4 A schematic diagram of the core 10 being placed in the steel shell 11 and then being placed in the formation cabinet 12 for formation is shown. The positive electrode of the charging device in the formation cabinet 12 is connected to the positive electrode tab 13 in the core 10, and the negative electrode of the charging device in the formation cabinet 12 is connected to the steel shell 11. The battery cell is formed in the formation cabinet 12 using the above method.

[0049] In a preferred embodiment, the positive electrode tab of the core is welded with the current interrupt device in the integrated cap in step eight. Since the core is formed before being welded with the cap, the core stores electricity. When the core is welded with the cap, the core is not charged by the protection circuit board, and the voltage of the core is higher than the lower limit voltage of the protection board. The protection board can monitor the presence of the core, and the battery does not need to be activated additionally.

[0050] In a specific embodiment, the positive electrode tab of the core is welded with the current interrupt device in the integrated cap in step eight. The positive electrode tab extends from the core and is connected with the current interrupt device. The current interrupt device is connected with the positive aluminum plate, and the positive aluminum plate is connected with the positive ring as the positive electrode of the core. One end of the current interrupt device is connected with the positive aluminum plate, and the other end is connected with the positive electrode tab of the core. When the core fails, the current interrupt device is disconnected under the action of the increased internal pressure, and the battery is disconnected and no longer continues to be charged, preventing safety accidents.

[0051] In a specific embodiment, the core with a voltage lower than the lower limit voltage of the protection circuit board is selected in step nine, so that the core not activated in the formation process in step seven is selected. Specifically, for the core with a voltage lower than the lower limit voltage of the protection circuit board, the core can be formed again, and the core itself can be further checked whether it is damaged or unqualified.

[0052] In a preferred embodiment, the integrated cap is sealed with the steel shell in step ten, which can be sealed by a sealing machine for one sealing, two sealing, and three sealing. One sealing, two sealing, and three sealing are a process of gradually pressing the battery, which can prevent the steel shell from being broken. In this scheme, squat sealing is not needed, and squat sealing can cause the positive electrode tab to be connected with the negative electrode, causing a short circuit.

[0053] In a specific embodiment, the core can be placed in warm alkaline water at about 50 degrees for 3-5 minutes, then drained, then placed in an oven for 15-30 minutes, and finally coated with rust-proof oil.

[0054] In a specific embodiment, step thirteen can include charging the core to 4.6V at a current of 100mA-1000mA, standing for 5 minutes, discharging the core to 1.0V at a current of 100mA-1000mA, and cutting off the current at 10mA, and finally charging the core to 4.6V at a current of 100mA-1000mA, so as to distinguish the capacity of the cylindrical lithium ion battery.

[0055] The application also discloses a cylindrical lithium ion integrated battery prepared by the method.

[0056] It is understood by those skilled in the art that the above-mentioned preferred embodiments can be freely combined, superimposed, without conflict.

[0057] It should be understood that the above-described embodiments are merely exemplary but not restrictive, and various obvious or equivalent modifications or replacements to the above-described details can be made by those skilled in the art without departing from the essential principles of the present application, and all of them shall be included in the scope of the claims of the present application.

Claims

1. A method for producing a cylindrical lithium-ion integrated battery, characterized in that: include: Step 1: Place the circular positive aluminum plate on the bottom of the inner side of the sealing ring, place the positive ring on the inner edge of the sealing ring, the positive ring is in contact with the positive aluminum plate, and place the plastic film insulation layer on the inner side of the positive ring and adjacent to the positive aluminum plate; Step 2: Place a protective circuit board on top of the plastic film insulation layer, weld the protective circuit board to the positive electrode ring, weld the negative electrode ring to the outer edge of the upper end of the protective circuit board, and weld the current interrupter to the outer side of the positive electrode aluminum plate, where the outer side is the side of the positive electrode aluminum plate facing the winding core, to obtain an integrated cap; Step 3: preparing the positive and negative electrode materials, coating, rolling, slitting, sheeting, and winding to form a core; Step 4: Place the core into a steel shell, weld the negative electrode tab of the core to the inner bottom of the steel shell, and groove the steel shell to obtain a battery cell; Step 5: baking the battery cell under high vacuum; Step 6: injecting electrolyte into the battery cell; Step 7: performing a formation treatment on the battery cell to charge the battery cell voltage to a first voltage; Step 8: Welding the positive electrode tab of the winding core to the current interruption device in the integrated cap to obtain a battery cell connected to the integrated cap; Step 9: Screen out the cells whose cell voltage is lower than the lower limit voltage of the protection circuit board; Step 10: sealing the integrated cap and the steel shell; Step 11: Cleaning and rust-proofing the battery cell; Step 12: Covering the battery core with a plastic outer film; Step 13: performing capacity separation processing on the battery cells to obtain cylindrical lithium-ion integrated batteries of different capacities.

2. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: By controlling the thickness of the positive electrode ring in the longitudinal direction, short circuit between the components on the protection circuit board and the positive electrode aluminum plate is prevented; by controlling the inner diameter of the positive electrode ring, short circuit between the positive electrode ring and the electronic components on the protection circuit board is prevented.

3. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: The protection circuit board has an input surface and an output surface, The output surface is the side of the protection circuit board having the positive electrode output of the cylindrical lithium-ion integrated battery, and the input surface is the other side opposite to the output surface; The protection circuit board is arranged inside the positive electrode ring, and the input surface of the protection circuit board faces the plastic film insulation layer, and the negative electrode ring is welded to the output surface of the protection circuit board.

4. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: The surface density of the positive electrode rolled dressing obtained after rolling the positive and negative electrodes in step three is the first density, and the surface density of the negative electrode rolled dressing is the second density.

5. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: After the positive and negative electrodes are stripped in step three, the width of the positive electrode strips obtained is the first width, and the width of the negative electrode strips obtained is the second width.

6. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: The positive and negative electrode winding in step three includes: The separator, the electrode glue and the positive and negative electrode sheets obtained in step 5 are wound into the winding core. The relative humidity of the winding environment is less than or equal to 30% RH and the temperature is 20-30°C.

7. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: The step five includes: placing the battery cell in a high vacuum oven, setting the temperature to a first temperature, setting the vacuum value to a first vacuum value, vacuum baking the battery cell for a first preset time, and then nitrogen baking the battery cell for a second preset time, and repeating the baking cycle for a preset number of times.

8. The method for producing a cylindrical lithium-ion integrated battery according to claim 1, wherein: The step seven comprises: Charging the battery cell for a third preset time at a first preset current value and a first preset voltage value; Then charging the battery cell for a fourth preset time at a second preset current value and a second preset voltage value; The cabinet checks whether the voltage of the cylindrical lithium-ion integrated battery is the first voltage. If so, it is determined that the cylindrical lithium-ion integrated battery meets the requirements and the cylindrical lithium-ion integrated battery is selected.

9. The method for producing a cylindrical lithium-ion integrated battery according to any one of claims 1 to 8, characterized in that: When the positive electrode tab of the winding core is welded to the current interruption device in the integrated cap in step eight, electricity is stored in the winding core.

10. A cylindrical lithium-ion integrated battery, characterized in that: The method is prepared by the method according to any one of claims 1 to 9.

Images