Battery cell forming exhaust device and battery cell forming equipment and method

Abstract

The present invention discloses a battery cell formation exhaust device and a battery cell formation equipment and method. The battery cell formation exhaust device comprises a driving device, an exhaust fixture, an exhaust pipeline, and a heat sealing fixture. The exhaust fixture and the heat sealing fixture are connected to the driving device and clamp the battery cell air bag under the drive of the driving device, wherein the exhaust fixture is also provided with a puncture piece, the puncture piece is used to form an exhaust port on the battery cell air bag, the exhaust pipeline is fluidly connected to the exhaust port, and the heat sealing fixture heat-seals the battery cell air bag after the exhaust is completed. The present invention can achieve safer battery production, and at the same time can greatly reduce costs and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of soft-pack batteries, and in particular to a battery cell formation exhaust device and a battery cell formation equipment and method. Background Art

[0002] The current new energy market is developing rapidly, the market share of electric vehicles is increasing, and the energy storage market is gradually entering a supporting expansion stage. Power batteries need to reduce costs quickly to enhance the driving force of electric vehicle cost competitiveness. At the same time, in response to the continued decline in policy subsidies, energy storage batteries need to reduce costs while ensuring the safety of large-scale energy storage equipment and the stable and long cycle life of energy storage batteries. The demand for new energy lithium-ion batteries is growing rapidly. As industrial technology is gradually upgraded and optimized, stable cost reduction is the key direction of technical development in the power / energy storage battery market.

[0003] However, during the formation and charging and discharging process of the current soft-pack lithium-ion battery, a large amount of gas is generated, which requires a large aluminum-plastic film air bag buffer, resulting in a large loss of the aluminum-plastic film. In addition, after the formation is completed, the vacuum chamber of the Degas equipment is evacuated and heat-sealed, which is a cumbersome process, complex structure, low production efficiency, high cost, and insufficient reliability. Summary of the invention

[0004] The object of the present invention is to provide a soft-pack battery cell formation exhaust device and soft-pack battery cell formation equipment and method to solve the problems existing in the above-mentioned prior art.

[0005] In order to solve the above-mentioned problem, according to one aspect of the present invention, a battery cell formation exhaust device is provided, the battery cell formation exhaust device comprises a driving device, an exhaust clamp, an exhaust pipeline, and a heat sealing clamp, the exhaust clamp and the heat sealing clamp are connected to the driving device and clamp the battery cell air bag under the drive of the driving device, wherein the exhaust clamp is also provided with a piercing member, the piercing member is used to form an exhaust port on the battery cell air bag, the exhaust pipeline is fluidically connected to the exhaust port, and the heat sealing clamp heat seals the battery cell air bag after the exhaust is completed.

[0006] In one embodiment, the vacuum clamp comprises a pair of vacuum clamps arranged opposite to each other, negative pressure suction cups are provided on opposite surfaces of the vacuum clamps, and the negative pressure suction cups are communicated with the vacuum pipeline.

[0007] In one embodiment, the piercing member is a probe, and the probe is disposed in the middle of the negative pressure suction cup.

[0008] In one embodiment, a spring is provided at the upper end of the vacuum fixture, and the driving device compresses the spring so that the vacuum fixture is clamped to compress the suction cup, and the probe in the middle of the suction cup is exposed and punctures the battery cell air bag.

[0009] In one embodiment, the driving device is a cylinder, and the piston rod of the cylinder is directly or indirectly connected to the upper ends of the vacuum clamp and the heat sealing clamp, so that the vacuum clamp and the heat sealing clamp are driven by the movement of the piston rod to clamp the battery cell air bag.

[0010] In one embodiment, the driving device includes a first cylinder and a second cylinder, the lower end of the first cylinder is connected to the heat sealing clamp and drives the heat sealing clamp to move, and the lower end of the second cylinder is connected to the vacuum clamp and drives the vacuum clamp to move.

[0011] In one embodiment, the lower ends of the first cylinder and the second cylinder are each connected to a conical member, the upper end of each of the conical members is connected to the first cylinder or the second cylinder, and the lower end of each of the conical members is connected to the heat sealing clamp or the vacuum clamp.

[0012] In one embodiment, the heat sealing fixture is connected to a heating tube.

[0013] In one embodiment, the heating tube is integrated with a temperature detector.

[0014] In one embodiment, the heat sealing clamp comprises a pair of heat sealing clamps arranged opposite to each other, the pair of heat sealing clamps arranged opposite to each other are formed with a notch, and the vacuum clamp is arranged in the notch.

[0015] In one embodiment, the heat sealing clamp forms an "L"-shaped structure as a whole and includes a vertical portion and a horizontal portion, wherein the horizontal portion is connected to the bottom end of the vertical portion and extends to one side of the vertical portion, thereby forming the notch above the horizontal portion and to the side of the vertical portion.

[0016] According to another aspect of the present invention, a battery cell forming equipment is provided, which includes a power device, a guide rail, a plurality of battery cell forming tanks and a plurality of the above-mentioned battery cell forming air exhaust devices, the plurality of battery cell forming air exhaust devices are connected to the guide rail, and the power device drives the guide rail to move to transport the plurality of battery cell forming air exhaust devices to above the battery cell forming tanks.

[0017] According to another aspect of the present invention, a soft-pack battery cell formation method is also provided, and the soft-pack battery cell formation method comprises the following steps:

[0018] Step 1: placing the battery cell to be processed into a battery cell forming device, wherein the battery cell forming device is equipped with a battery cell forming exhaust device;

[0019] Step 2: Connect the battery cell into a gas extraction device to the air bag of the battery cell, and form a gas extraction port on the air bag;

[0020] Step 3, starting the battery cell forming equipment to perform a forming operation on the battery cell;

[0021] Step 4: starting the battery cell formation gas extraction device to extract the gas generated during the formation process in the air bag;

[0022] Step 5: Seal the air extraction port on the air bag.

[0023] In one embodiment, in step five, the air extraction port on the air bag is sealed by heat sealing.

[0024] In one embodiment, the battery cell formation vacuum device includes a vacuum clamp, a negative pressure suction cup is provided on the vacuum clamp, and a probe is provided in the middle of the negative pressure suction cup. In the step two, the air bag is clamped by the vacuum clamp, and the vacuum port is formed in the air bag by the probe in the negative pressure suction cup. In the step four, the gas in the air bag is extracted through the vacuum pipeline connected to the negative pressure suction cup.

[0025] In one embodiment, the battery cell formation exhaust device also includes a heat sealing clamp, which is connected to a heating tube, wherein the heating tube is integrated with a temperature detector, and in step five, the exhaust port on the air bag is heat-sealed by starting the heat sealing clamp.

[0026] In one embodiment, step three and step four are performed simultaneously.

[0027] In one embodiment, the battery cell forming equipment is the above-mentioned battery cell forming equipment, and / or the battery cell forming exhaust device is the above-mentioned battery cell forming exhaust device.

[0028] The battery cell formation equipment and battery cell formation method of the present invention improve the existing soft-pack battery cell formation method, integrate negative pressure exhaust and heat sealing functions, simplify the structure and process, thereby achieving safer battery production, and at the same time can greatly reduce costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional schematic diagram of a battery cell formation exhaust device according to an embodiment of the present invention.

[0030] Figure 2 It is another stereoscopic view of the battery cell formation and exhaust device according to one embodiment of the present invention.

[0031] Figure 3 yes Figure 2 Magnified view of part A.

[0032] Figure 4 The present invention discloses a method for forming a soft-pack battery cell according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0034] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0035] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0036] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0037] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0038] The battery cell formation exhaust device, soft-pack battery cell formation equipment and soft-pack battery cell formation method involved in the present invention are mainly used for the formation process of soft-pack battery cells. The soft-pack battery cell involved in the present invention mainly refers to the battery cell of a soft-pack lithium-ion battery, which generally includes a package that wraps the battery cell and an electrode electrically connected to the battery cell. The battery cell is generally in the form of a stack. The material of the package is generally an aluminum-plastic composite film, but any other suitable material may also be used. The electrode includes a positive electrode and a negative electrode respectively located at both ends of the battery. The battery cell and the electrode may adopt any suitable structure and material known in the art or to be developed, which will not be described in detail here. The battery of the present application can be used to power new energy vehicles and other equipment.

[0039] The present invention can solve the problem that a large amount of gas is generated during the charge and discharge of the existing soft-pack battery cells, and a large aluminum-plastic film air bag is required to buffer the gas. After the formation is completed, negative pressure exhaust and heat sealing are performed in the vacuum chamber of the exhaust equipment (Degas), which is complicated in process, complex in structure, high in cost and low in production efficiency. The invention mainly optimizes the formation process of the soft-pack battery cells, integrates the negative pressure exhaust and heat sealing functions in the formation equipment, and directly exhausts the gas generated during the charge and discharge process of the formation through the battery cell formation exhaust device, thereby saving the vacuum chamber structure of the exhaust equipment (Degas) and reducing the volume of the battery cell aluminum-plastic film air bag, which can effectively reduce costs and improve production efficiency.

[0040] Refer to the following Figure 1 The battery cell formation exhaust device 100 of the present invention is described. The battery cell formation exhaust device 100 is mainly used to be combined with a soft-pack battery cell formation device to realize that when the soft-pack battery cell starts to generate gas, the gas generated by the formation is directly extracted synchronously, saving the vacuum chamber mechanism of the exhaust device, reducing the volume of the battery cell aluminum-plastic film air bag, effectively reducing costs, and improving production efficiency.

[0041] Figure 1 FIG. 1 is a three-dimensional schematic diagram of a battery cell forming and exhausting device 100 according to an embodiment of the present invention. Figure 1 As shown, a battery cell formation exhaust device 100 according to an embodiment of the present invention includes a driving device 10, a heat sealing clamp 30 and an exhaust clamp 40. The heat sealing clamp 30 is connected to a heat sealing heating tube 70. Preferably, the heat sealing heating tube 70 is integrated with a temperature detector (not shown). The exhaust clamp 40 is connected to the exhaust pipeline 80. In the present embodiment, the driving device 10 is a cylinder, and the cylinder is fixed by a fixing member 20. However, those skilled in the art will appreciate that in other embodiments, other forms of driving devices, such as a screw rod, etc., may also be used. The lower end of the driving device 10 is respectively connected to the heat sealing clamp 30 and the exhaust clamp 40, so that the heat sealing clamp 30 and the exhaust clamp 40 can be driven by the movement of the driving device 10 to perform clamping and opening operations.

[0042] Specifically, in this embodiment, the driving device 10 includes two cylinders, each cylinder is connected to a conical member 50 at the lower end, the upper end of the conical member 50 is connected to the cylinder, and the lower end of the conical member 50 is connected to the heat sealing fixture 30 and the vacuum fixture 40. The cylinder drives the conical member 50 to move up and down, thereby driving the heat sealing fixture 30 and the vacuum fixture 40 to clamp and release. However, it should be understood that the method of connecting the double cylinders to the heat sealing fixture and the vacuum fixture for driving is only an example, and other methods can also be used to achieve this action.

[0043] Figure 2 is another three-dimensional diagram of a battery cell forming and exhausting device 100 according to an embodiment of the present invention. Figure 3 yes Figure 2This is an enlarged view of part A of the Figure 2-3 As shown, the vacuum fixture 40 includes a pair of clamping members 41 arranged opposite to each other, and a spring (not shown) is provided at the upper end of the pair of clamping members 41 arranged opposite to each other. When the cylinder drives the conical member 50 to support the upper end of the pair of clamping members 41, the clamping members 41 perform a clamping action to clamp the air bag 60. A negative pressure suction cup 81 is provided on the opposite surfaces of the pair of clamping members 41, and a probe 82 is provided in the middle of the negative pressure suction cup 81. The suction cup 81 is connected to the battery cell forming vacuum device (not shown). When the clamping member 41 clamps the air bag 60, the probe 82 can puncture the air bag 60, and the battery cell forming vacuum device works to extract the gas in the air bag 60.

[0044] Continue to refer to Figure 1-3 , the soft-packed battery cell 61 is encapsulated by an aluminum-plastic film and an aluminum-plastic film air bag 60 is left, and the gas generated by the battery cell 61 during the formation process is stored in the air bag 60. During the formation process, the exhaust fixture 40 moves downward under the drive of the driving device 10 and clamps the air bag 60, so that the suction cup 81 with the probe 82 is exposed and punctures the air bag 60. When the battery cell 61 begins to be formed, the battery cell formation exhaust device 100 is started, and the gas generated during the formation and charging and discharging process of the battery cell 61 enters the suction cup 81 through the puncture hole of the air bag 60 in real time. The gas is drawn into the buffer tank (not shown) through the exhaust pipeline 80 connected to the air outlet of the suction cup 81, and then discharged after being filtered by organic corrosive gas, for example. When the formation of the battery cell 61 is completed, the battery cell formation exhaust device 100 starts the heat sealing fixture 30 to heat-seal the punctured area of ​​the air bag 60, thereby ensuring the air tightness of the battery cell aluminum-plastic film.

[0045] Reference Figure 3 The heat sealing clamp 30 includes a pair of heat sealing clamps 34 arranged oppositely, each heat sealing clamp 34 forms an "L"-shaped structure as a whole and includes a vertical portion 32 and a horizontal portion 33, the horizontal portion 33 is connected to the bottom end of the vertical portion 32 and extends to one side of the vertical portion 32, so that a notch 31 is formed above the horizontal portion 33 and on the side of the vertical portion 32, and the vacuum clamp 40 is arranged in the notch 31. It should be noted that in the invention, the vacuum clamp 40 is composed of a pair of clamping clamps 41 arranged oppositely, and the heat sealing clamp 30 is composed of a pair of heat sealing clamps 34 arranged oppositely, each heat sealing clamp 34 is formed with a notch 31, and each clamping clamp 41 is arranged in each notch 31.

[0046] It should be noted that, although in the above-described embodiments, the heat sealing clamp seals the air evacuation port on the air bag by heat sealing, those skilled in the art will appreciate that the air evacuation port may also be sealed by other methods, and the present invention is not limited to heat sealing.

[0047] According to one embodiment of the present invention, a soft-pack battery cell forming system is also provided, comprising at least one of the above-mentioned battery cell forming air extraction devices, a power device, a guide rail and a plurality of soft-pack battery cell forming tanks, wherein at least one of the above-mentioned battery cell forming air extraction devices is connected to the guide rail, and the power device drives the guide rail to move, so that the battery cell forming air extraction device can be pushed to the top of the battery cell forming tank, and the soft-pack battery cell encapsulated with an aluminum-plastic film is arranged in the battery cell forming tank, and the air extraction clamp and the heating clamp of the soft-pack battery cell forming air extraction device are driven downward by the driving device to clamp the soft-pack battery cell encapsulated with the aluminum-plastic film, so that the gas generated by the formation in the air bag is simultaneously extracted during the formation of the soft-pack battery cell in the forming tank, and the air bag is heat-sealed by the heating clamp in a timely manner after the formation is completed to ensure the airtightness of the battery cell aluminum-plastic film, thereby effectively reducing costs and improving production efficiency.

[0048] Figure 4 This is a soft pack battery cell formation method according to an embodiment of the present invention. Figure 4 The following is a method for forming a soft-pack battery cell according to an embodiment of the present invention. Figure 4 As shown, the soft pack battery cell formation method includes the following steps:

[0049] Step S100: placing the battery cell to be processed into a battery cell forming device, wherein the battery cell forming device is equipped with a battery cell forming exhaust device.

[0050] The battery cell forming device can be any device used in the art to perform forming treatment on soft-pack battery cells, and the battery cell forming exhaust device in the above embodiment is installed on the battery cell forming device. The battery cell encapsulated with aluminum-plastic film is placed in the battery cell forming tank of the battery cell forming device.

[0051] Step S200: connecting the battery cell forming exhaust device to the air bag of the battery cell, and forming an exhaust port on the air bag.

[0052] The vacuum fixture 40 and the heat sealing fixture 30 are driven down to the air bag position of the soft-pack battery cell by a driving device 10 (such as a cylinder), and the vacuum fixture 40 is driven to clamp the air bag 60 of the soft-pack battery cell, so that the suction cup 81 with the probe 82 is exposed to pierce the air bag 60, thereby forming a vacuum port on the air bag 60.

[0053] Step S300: starting the battery cell formation equipment to perform a formation operation on the battery cell.

[0054] Start the battery cell formation equipment and perform battery cell formation treatment by charging and discharging.

[0055] Step S400: starting the battery cell formation gas extraction device to extract the gas generated during the formation process in the air bag.

[0056] The formation equipment is started to perform formation charge and discharge operations on the soft-pack battery cell. When the battery cell 61 begins to be formed, the battery cell formation exhaust device 100 is started to allow the gas generated during the formation charge and discharge process of the battery cell 61 to enter the suction cup 81 through the puncture hole of the air bag 60 in real time. The gas is extracted into a buffer tank (not shown) through the exhaust pipe 80 connected to the air outlet of the suction cup 81, and then discharged after being filtered for organic corrosive gases.

[0057] Step S500: sealing the air extraction port on the air bag.

[0058] When the battery cell 61 is formed, the battery cell forming air extraction device 100 starts the heat sealing clamp 30 to heat seal the punctured area (ie, the air inlet) of the air bag 60, thereby ensuring the airtightness of the battery cell aluminum-plastic film.

[0059] It should be noted that in the above-mentioned steps S200 and S300, it is not necessary to use the battery cell formation exhaust device described in the present invention. Any battery cell formation exhaust device that can achieve the exhaust function can be used. The exhaust can be carried out by negative pressure or other methods. It is only necessary to realize that the gas generated by the formation in the air bag during the charging and discharging process is exhausted.

[0060] In addition, it should be noted that in the above step S500, the airbag does not necessarily have to be sealed by heat sealing, and any other sealing method can be used as long as the punctured airbag can be sealed.

[0061] Of course, it should be noted that in the above-mentioned steps S200, S400 and S500, the use of the battery cell formation exhaust device 100 of the present invention can achieve the best effect, for example, it can save the vacuum chamber structure of the exhaust equipment to the greatest extent, reduce the volume of the battery cell aluminum-plastic film air bag, and effectively reduce costs and improve production efficiency.

[0062] In addition, the above steps S300 and S400 can be performed simultaneously, that is, when the battery cell is formed, the battery cell formation exhaust device is started to extract the gas in the air bag.

[0063] In summary, the battery cell formation equipment and battery cell formation method of the present invention improve the existing soft-pack battery cell formation method, integrate negative pressure exhaust and heat sealing functions, simplify the structure and process, thereby achieving safer battery production, greatly reducing costs and improving production efficiency.

[0064] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0065] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

Claims

1. A battery cell forming exhaust device, characterized in that: The battery cell formation degassing device comprises a driving device, a degassing fixture, a degassing pipeline, and a heat sealing fixture, wherein the degassing fixture and the heat sealing fixture are connected to the driving device and clamp the battery cell air bag under the drive of the driving device, wherein the degassing fixture is further provided with a piercing member, wherein the piercing member is used to form a degassing port on the battery cell air bag, the degassing pipeline is fluidically connected to the degassing port, and the heat sealing fixture heat-seals the battery cell air bag after degassing is completed; The heat sealing clamp comprises a pair of heat sealing clamps arranged opposite to each other, the pair of heat sealing clamps arranged opposite to each other are formed with a notch, and the vacuum clamp is arranged in the notch; The heat sealing clamp forms an "L"-shaped structure as a whole and includes a vertical portion and a horizontal portion, wherein the horizontal portion is connected to the bottom end of the vertical portion and extends to one side of the vertical portion, thereby forming the notch above the horizontal portion and to the side of the vertical portion; The driving device is a cylinder, and the piston rod of the cylinder is directly or indirectly connected to the upper ends of the vacuum fixture and the heat sealing fixture, so that the vacuum fixture and the heat sealing fixture are driven by the movement of the piston rod to clamp the battery cell air bag; The driving device comprises a first cylinder and a second cylinder, the lower end of the first cylinder is connected to the heat sealing clamp and drives the heat sealing clamp to move, and the lower end of the second cylinder is connected to the vacuum clamp and drives the vacuum clamp to move; The lower ends of the first cylinder and the second cylinder are respectively connected to a conical member, the upper end of each of the conical members is connected to the first cylinder or the second cylinder, and the lower end of each of the conical members is connected to the heat sealing fixture or the vacuum fixture.

2. The battery cell formation exhaust device according to claim 1, characterized in that: The vacuum clamp comprises a pair of vacuum clamps arranged opposite to each other, and negative pressure suction cups are arranged on opposite surfaces of the vacuum clamps, and the negative pressure suction cups are communicated with the vacuum pipeline.

3. The battery cell formation exhaust device according to claim 2, characterized in that: The piercing member is a probe, and the probe is arranged in the middle of the negative pressure suction cup.

4. The battery cell formation exhaust device according to claim 3, characterized in that: A spring is provided at the upper end of the vacuum fixture, and the driving device compresses the spring so that the vacuum fixture is clamped to compress the suction cup, and the probe in the middle of the suction cup is exposed to pierce the battery core air bag.

5. The battery cell formation exhaust device according to claim 1, characterized in that: The heat sealing fixture is connected to the heating tube.

6. The battery cell formation exhaust device according to claim 5, characterized in that: The heating tube is integrated with a temperature detector.

7. A battery cell formation device, characterized in that: The battery cell forming equipment includes a power device, a guide rail, a plurality of battery cell forming tanks and a plurality of battery cell forming air exhaust devices as described in any one of claims 1 to 6. The plurality of battery cell forming air exhaust devices are connected to the guide rail, and the power device drives the guide rail to move to transport the plurality of battery cell forming air exhaust devices to the top of the battery cell forming tanks.

8. A method for forming a soft-pack battery cell, characterized in that: The soft-pack battery cell formation method comprises the following steps: Step 1: placing the battery cell to be processed into a battery cell forming device, wherein the battery cell forming device is equipped with a battery cell forming exhaust device; Step 2: Connect the battery cell into a gas extraction device to the air bag of the battery cell, and form a gas extraction port on the air bag; Step 3, starting the battery cell forming equipment to perform a forming operation on the battery cell; Step 4: starting the battery cell formation gas extraction device to extract the gas generated during the formation process in the air bag; Step 5: sealing the air extraction port on the air bag; The battery cell forming equipment is the battery cell forming equipment according to claim 7, and / or the battery cell forming exhaust device is the battery cell forming exhaust device according to any one of claims 1-6.

9. The method according to claim 8, characterized in that In the step five, the air extraction port on the air bag is sealed by heat sealing.

10. The method according to claim 8, characterized in that The battery cell formation exhaust device includes an exhaust clamp, a negative pressure suction cup is provided on the exhaust clamp, and a probe is provided in the middle of the negative pressure suction cup. In the step two, the air bag is clamped by the exhaust clamp, and the exhaust port is formed in the air bag by the probe in the negative pressure suction cup. In the step four, the gas in the air bag is extracted through the exhaust pipeline connected to the negative pressure suction cup.

11. The method according to claim 10, characterized in that The battery cell formation exhaust device also includes a heat sealing clamp, which is connected to a heating tube, wherein the heating tube is integrated with a temperature detector, and in step five, the exhaust port on the air bag is heat-sealed by starting the heat sealing clamp.

12. The method according to claim 8, characterized in that The step three and the step four are performed simultaneously.

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