Negative pressure adsorption device and formation system

Abstract

The utility model provides a negative pressure adsorption device and a formation system.The negative pressure adsorption device comprises an adsorption body and an abutting part, the adsorption body is provided with a channel, an inlet and an outlet, the inlet and the outlet communicate with the channel, and the abutting part is connected to the side, in the first direction, of the adsorption body in a protruding mode and arranged around the inlet; the liquid injection hole of the battery can be formed and covered around the inlet of the adsorption body through the abutting part, so that the sealing of the battery in the formation process is ensured. Wherein the height of the abutting part protruding out of the adsorption body in the first direction is adjustable, so that the adsorption body can be driven by the abutting part to move towards one side close to the liquid injection hole of the battery, and the elastic switch valve is extruded by the adsorption body, so that the elastic switch valve is kept open in the formation process, and valve opening exhaust in the battery formation process is realized.

Description

Technical Field

[0001] The present application relates to the field of power batteries, and in particular to a negative pressure adsorption device and a formation system. Background Art

[0002] Formation is the process of activating the battery after injection, so that a chemical reaction occurs inside the battery to form a SEI film (solid electrolyte interphase) to ensure the performance of the battery during the subsequent charge and discharge cycle. During this process, the battery will produce a certain amount of gas, which will affect the formation of the SEI film and thus affect the subsequent performance of the battery.

[0003] At present, in order to prevent the gas generated during the battery formation process from affecting the formation of the SEI film, it is necessary to keep the battery in a high negative pressure state during the battery formation process to discharge the gas generated by the battery in real time. However, the injection hole of the new battery is provided with an elastic switch valve, which increases the difficulty of pumping negative pressure from the battery and hinders the exhaust during the battery formation process. Therefore, how to realize the valve opening exhaust during the battery formation process has become a problem to be solved urgently. Utility Model Content

[0004] In view of the above problems, the present application provides a negative pressure adsorption device and a formation system, which can realize valve opening and exhaust during the battery formation process while ensuring the sealing of the battery.

[0005] In the first aspect, the present application provides a negative pressure adsorption device, including an adsorption body and an abutment portion, the adsorption body having a channel and an inlet and an outlet connected to the channel, the abutment portion protrudingly connected to one side of the adsorption body in a first direction and arranged around the inlet, wherein the height dimension of the abutment portion protruding from the adsorption body in the first direction is adjustable.

[0006] In the embodiment of the present application, the abutment part can be arranged around the inlet of the adsorption body and cover the injection hole of the battery to ensure the sealing during the battery formation process. In addition, by making the height dimension of the abutment part protruding from the adsorption body in the first direction adjustable, the adsorption body can be driven by the abutment part to move toward the side close to the injection hole of the battery, so that the elastic switch valve is squeezed by the adsorption body to keep the elastic switch valve open during the formation process, so as to realize the valve opening and exhaust during the battery formation process.

[0007] In some embodiments, the abutment portion is configured as an elastic material body, and the negative pressure adsorption device includes a first state and a second state; in the first state, the abutment portion protrudes a first distance along a first direction relative to the adsorption body, and in the second state, the abutment portion is in an elastically deformed state, and the abutment portion protrudes a second distance along the first direction relative to the adsorption body, and the second distance is smaller than the first distance.

[0008] In some embodiments, the abutting portion and the adsorption body are configured as an integrated structure, which reduces manufacturing difficulty and provides higher reliability.

[0009] In some embodiments, a groove is provided at the junction of the adsorption body and the abutment portion, and the supporting strength of the abutment portion is weakened by the groove. Thus, when the negative pressure adsorption device is pressed downward, the abutment portion is guided to elastically deform relative to the adsorption body at the groove, thereby reducing the deformation amount of the abutment portion, increasing the downward pressure amount of the negative pressure adsorption device, reducing the difficulty of deformation, and also making the deformation of the abutment portion more controllable.

[0010] In some embodiments, the abutment portion is formed with a guide channel connected to the inlet, and the size of the guide channel along the second direction gradually increases in the direction away from the adsorption body, and the second direction intersects with the first direction. Specifically, the inner wall surface of the abutment portion can be inclined, so that when the negative pressure adsorption device is pressed down, the abutment portion can be guided to deform outward along the second direction, thereby reducing the difficulty of deformation and making the deformation of the abutment portion more controllable, so as to achieve sealing during the process of pressing down the negative pressure adsorption device.

[0011] In some embodiments, the adsorption body is provided with a groove on the end surface facing the abutment portion in the first direction, the groove is connected to the inlet, and the abutment portion is at least arranged around the circumference of the groove. By providing the groove connected to the inlet on the end surface, the groove can play a role of confluence, so that the gas in the guide channel is converged to the inlet of the adsorption body through the groove, which is more convenient for realizing the convergence and discharge of the gas in the battery.

[0012] In some embodiments, there are multiple grooves, and the multiple grooves are radially extended relative to the inlet; or, the multiple grooves are distributed in concentric rings relative to the inlet, and two adjacent grooves are interconnected, which can better play the role of confluence, and can also further be compatible with the position offset of the negative pressure adsorption device and the battery end cover, thereby improving applicability.

[0013] In some embodiments, the channel includes a connected first section and a second section, the first section is arranged closer to the inlet relative to the second section, and the diameter of the first section is smaller than the diameter of the second section, so that negative pressure can be more easily formed to quickly discharge the gas from the negative pressure adsorption device.

[0014] In some embodiments, the channel also includes a third section connected between the first section and the second section, and the diameter of the third section is gradually set from the first section to the second section, so that a transition structure can be formed between the first section and the second section, so as to more reliably realize the discharge of gas in the battery during the formation process.

[0015] In a second aspect, an embodiment of the present application provides a chemical formation system, comprising the negative pressure adsorption device of the first aspect.

[0016] According to the negative pressure adsorption device of the embodiment of the present application, it includes an adsorption body and an abutment part. The abutment part is protruding from one side of the adsorption body along the first direction, and the abutment part is arranged around the inlet of the adsorption body. Therefore, when the negative pressure adsorption device is arranged on the battery, the adsorption body can be supported on the battery and cover the injection hole of the battery through the abutment part to ensure the sealing of the battery. In addition, by making the height dimension of the abutment part protruding from the adsorption body in the first direction adjustable, the adsorption body can be driven by the abutment part to move toward the side of the injection hole close to the battery, thereby squeezing the elastic switch valve through the adsorption body, so that the elastic switch valve remains open during the formation process, and the valve opening and exhaust during the battery formation process are realized.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 is a schematic structural diagram of a negative pressure adsorption device provided by an embodiment of the present application;

[0020] Figure 2 is a front view of a negative pressure adsorption device provided by an embodiment of the present application;

[0021] Figure 3 is a cross-sectional view of a negative pressure adsorption device provided by an embodiment of the present application;

[0022] Figure 4 is a cross-sectional view of a negative pressure adsorption device provided by an embodiment of the present application, which is arranged on a battery in a first state;

[0023] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0024] Figure 6 is a cross-sectional view of a negative pressure adsorption device provided by an embodiment of the present application, which is arranged on a battery in a second state;

[0025] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0026] Figure 8is a bottom view of a negative pressure adsorption device provided by an embodiment of the present application;

[0027] Fig. 9 is a cross-sectional view of a negative pressure adsorption device provided in another embodiment of the present application;

[0028] Fig.10 It is a bottom view of a negative pressure adsorption device provided in another embodiment of the present application.

[0029] The reference numerals in the specific implementation manner are as follows:

[0030] 100 negative pressure adsorption device, 200 battery, 210 end cover, 300 elastic switch valve, 310 valve body, 320 fixed section, 330 movable section, 340 elastic member;

[0031] 1 adsorption body, 11 channel, 111 first section, 112 second section, 113 third section, 12 end surface, 121 groove, 2 abutment portion, 21 groove;

[0032] K1 import, K2 export;

[0033] X is the first direction, Y is the second direction. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0036] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] The purpose of formation is to activate the battery. During the first charge and discharge process of the battery, the electrode material and the electrolyte react at the solid-liquid interface to form a passivation film covering the surface of the electrode material. This passivation film is an interface layer with the characteristics of a solid electrolyte. This passivation film is also called a solid electrolyte interface film, or SEI film for short. The formation of the SEI film has a crucial impact on the subsequent working performance of the battery.

[0041] At present, in order to facilitate the discharge of gas during the battery formation process and prevent the gas generated during the battery formation process from affecting the formation of the SEI film, during the battery formation process, the negative pressure source is connected to the inside of the battery through a pipeline, and the battery injection hole is pressed by a suction nozzle to exhaust the negative pressure inside the battery. In this way, by connecting the battery to the negative pressure source so that the inside of the battery is in a negative pressure environment, the battery formation exhaust gas can be timely extracted to the outside of the battery housing.

[0042] However, in the related art, in conjunction with the end cap of the new battery, an elastic switch valve is provided at the liquid injection hole of the battery. When no liquid is injected, the elastic switch valve is in a closed valve sealing state to achieve sealing protection for the battery. However, in the above structure, due to the limitation of the elastic switch valve, it is difficult for the suction nozzle to directly exhaust the negative pressure inside the battery through the liquid injection hole of the battery.

[0043] In order to solve the above technical problems, the embodiments of the present application provide a negative pressure adsorption device and a formation system, which can press against an elastic switch valve to keep the elastic switch valve open during the formation process, thereby achieving formation exhaust of the battery.

[0044] See also Figures 1 to 7 The negative pressure adsorption device 100 provided in the embodiment of the present application includes an adsorption body 1 and an abutment portion 2, the adsorption body 1 has a channel 11 and an inlet K1 and an outlet K2 connected to the channel 11, the abutment portion 2 protrudes and is connected to one side of the adsorption body 1 in the first direction X and is arranged around the inlet K1, wherein the height dimension of the abutment portion 2 protruding from the adsorption body 1 in the first direction X is adjustable.

[0045] It can be understood that the outlet K2 of the adsorption body 1 is used to connect with the negative pressure source, the channel 11 of the adsorption body 1 provides a negative pressure pipeline, and is used to connect with the injection hole of the battery 200 through the inlet K1 of the adsorption body 1, so that the interior of the battery 200 is in a negative pressure environment.

[0046] The negative pressure adsorption device 100 in the embodiment of the present application is provided with an abutting portion 2 protruding from one side of the adsorption body 1 along the first direction X, and the abutting portion 2 is arranged around the inlet K1 of the adsorption body 1. Therefore, when the negative pressure adsorption device 100 is arranged on the battery 200, the adsorption body 1 can be supported on the battery 200 and cover the injection hole of the battery 200 through the abutting portion 2 to ensure the sealing of the battery 200. In addition, by making the height dimension of the abutting portion 2 protruding from the adsorption body 1 in the first direction X adjustable, the adsorption body 1 can be driven by the abutting portion 2 to move toward the injection hole of the battery 200, so that the elastic switch valve 300 is squeezed by the adsorption body 1, so that the elastic switch valve 300 remains open during the formation process, and the valve opening and exhaust of the battery 200 during the formation process are realized.

[0047] It should be noted that the negative pressure adsorption device 100 in the embodiment of the present application can be used for a battery 200 provided with an elastic switch valve 300, and can also be used for a battery 200 not provided with an elastic switch valve 300. The battery 200 can be a secondary battery, which refers to a battery 200 that can be continuously used by activating the active material by charging after the battery 200 is discharged.

[0048] The battery 200 includes a shell, an electrode assembly, an end cover 210 and other functional components.

[0049] The housing is a component used to cooperate with the end cap 210 to form the internal environment of the battery 200, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The housing and the end cap 210 can be independent components, and an opening can be set on the housing, and the internal environment of the battery 200 is formed by covering the opening with the end cap 210.

[0050] The injection hole is a through hole provided on the battery 200 and connected to the inside of the battery 200, through which electrolyte can be injected into the battery 200. The shape of the injection hole can be circular, elliptical or polygonal, and the position of the injection hole can be provided on the end cover 210, on the side of the shell or on the bottom of the shell. There can be multiple injection holes to improve the injection efficiency of the battery 200.

[0051] See also Figures 3 to 7 The elastic switch valve 300 may include a valve body 310 and a valve sleeve. The valve sleeve is sleeved on the outer periphery of the valve body 310 and includes a fixed section 320 and a movable section 330 which are separately arranged. The fixed section 320 is connected to the battery end cover 210. The movable section 330 extends into the injection hole and is connected to the fixed section 320 through an elastic member 340. The valve body 310 is overlapped on the movable section 330 and protrudes from the battery end cover 210 along the first direction X.

[0052] Under normal conditions, the fixed section 320 and the movable section 330 are connected and block the injection hole of the battery 200. After pressing the valve body 310, the valve body 310 will drive the movable section 330 to move along the first direction X, the elastic member 340 will be elastically deformed, and an air gap will be formed between the movable section 330 and the fixed section 320, thereby opening the valve. Moreover, after the pressure on the valve body 310 is canceled, the movable section 330 will be reconnected with the fixed section 320 under the restoring force of the elastic member 340, thereby sealing the battery 200.

[0053] Taking the elastic switch valve 300 in the above embodiment as an example, in the negative pressure adsorption device 100 in the embodiment of the present application, by adjusting the size of the abutting portion 2 along the first direction X, the adsorption body 1 can be driven to move toward the side of the injection hole close to the battery 200, and the valve body 310 of the elastic switch valve 300 is pressed by the adsorption body 1, thereby realizing effective valve opening in the formation process. The overall structure is simple, and the design is stable and reliable.

[0054] With respect to the elastic switch valve 300 in the above embodiment, when designing the negative pressure adsorption device 100, the maximum dimension of the abutment portion 2 protruding from the adsorption body 1 along the first direction X can be greater than the height of the valve body 310 protruding from the end cap 210 along the first direction X, so that when the negative pressure adsorption device 100 is set on the battery 200, the abutment portion 2 can contact with the end cap 210 of the battery 200 to form a seal, thereby reducing the risk of electrolyte being drawn out of the battery 200 and contaminating the end cap 210 during the negative pressure extraction process. In addition, the size of the inlet K1 of the adsorption body 1 is smaller than the size of the valve body 310, so that when the negative pressure adsorption device 100 is pressed down, the adsorption body 1 can reliably press the valve body 310 of the elastic switch valve 300 to achieve effective valve opening during the formation process.

[0055] It is understandable that in some embodiments, a sleeve-type telescopic device, a sealed telescopic joint, etc. can be provided to adjust the height dimension of the abutment portion 2 protruding from the adsorption body 1 in the first direction X by providing a telescopic structure.

[0056] See also Figures 3 to 7 In other embodiments, the abutting portion 2 is configured as an elastic material body, and the negative pressure adsorption device 100 includes a first state and a second state. In the first state, the abutting portion 2 protrudes a first distance relative to the adsorption body 1 along the first direction X, and in the second state, the abutting portion 2 is in an elastically deformed state, and the abutting portion 2 protrudes a second distance relative to the adsorption body 1 along the first direction X, and the second distance is smaller than the first distance.

[0057] By providing the contact portion 2 as an elastic material body, the negative pressure adsorption device 100 can be switched between the first state and the second state by pressing down the contact portion 2 .

[0058] When the negative pressure adsorption device 100 is in the first state, the abutting portion 2 can cover the outer periphery of the injection hole and contact the battery end cover 210 to form a seal. When the negative pressure adsorption device 100 is pressed down to be in the second state, the abutting portion 2 can be elastically deformed, the adsorption body 1 presses the valve body 310, and the valve body 310 is forced to move along the first direction X to open the valve, and the injection hole in the battery 200 is connected to the inlet K1 of the adsorption body 1, so that the battery 200 can be formed.

[0059] After the formation is completed, the negative pressure adsorption device 100 can be moved upward. After the adsorption body 1 is separated from the valve body 310, the elastic switch valve 300 can close the injection hole under the action of its own elastic force. After continuing to move upward, the abutment part 2 is separated from the battery end cover 210, and the abutment part 2 is restored to its original state under the action of the elastic restoring force. The negative pressure adsorption device 100 returns to the first state from the second state, thereby completing the entire formation process.

[0060] It is understandable that the negative pressure adsorption device 100 can open the elastic switch valve 300 after forming a seal with the battery end cover 210, and the negative pressure adsorption device 100 can also be separated from the battery end cover 210 after closing the elastic switch valve 300. During the entire formation process, the battery 200 can always be isolated and sealed from the external environment, which can reduce the risk of formation gas overflowing to the environment or electrolyte leakage contaminating the top cover, while the structure is simple, the cost is low, and the operation is convenient.

[0061] In some optional embodiments, the abutment portion 2 and the adsorption body 1 are configured as an integrated structure, and the abutment portion 2 can be configured around the outer edge of the adsorption body 1, which reduces the manufacturing difficulty and has higher reliability. For example, the negative pressure adsorption device 100 can be made of a corrosion-resistant and elastic material, such as EPDM rubber.

[0062] See also Figures 3 to 7 When the abutment portion 2 and the adsorption body 1 are set as an integrated structure, in order to facilitate the elastic deformation of the abutment portion 2 along the first direction X, optionally, a groove 21 is provided at the junction of the adsorption body 1 and the abutment portion 2, so as to weaken the supporting strength of the abutment portion 2 through the groove 21, so that when the negative pressure adsorption device 100 is pressed down, the abutment portion 2 is guided to elastically deform relative to the adsorption body 1 at the groove 21, thereby reducing the deformation amount of the abutment portion 2, increasing the downward pressure of the negative pressure adsorption device 100, reducing the difficulty of deformation, and also making the deformation of the abutment portion 2 more controllable.

[0063] Optionally, the groove 21 may be configured as an annular groove to make the deformation of the abutting portion 2 more uniform, thereby reducing the risk of the negative pressure adsorption device 100 tipping over to one side when the negative pressure adsorption device 100 is pressed down, thereby improving reliability.

[0064] In some optional embodiments, the abutting portion 2 is formed with a guide channel connected to the inlet K1, and the size of the guide channel along the second direction Y gradually increases in the direction away from the adsorption body 1, and the second direction Y intersects with the first direction X. That is, in addition to providing the groove 21 at the junction of the adsorption body 1 and the abutting portion 2, the structure of the abutting portion 2 itself can also be adjusted to reduce the difficulty of elastic deformation of the abutting portion 2 along the first direction X.

[0065] Specifically, the abutment portion 2 may have an outer wall surface and an inner wall surface, wherein the size of the guide channel along the second direction Y gradually increases in the direction away from the adsorption body 1. Specifically, the inner wall surface of the abutment portion 2 may be inclined, so that when the negative pressure adsorption device 100 is pressed down, the abutment portion 2 can be guided to deform outward along the second direction Y, thereby reducing the difficulty of deformation and making the deformation of the abutment portion 2 more controllable, so as to achieve sealing during the process of pressing down the negative pressure adsorption device 100.

[0066] It can be understood that the groove 21 can be provided only at the junction of the adsorption body 1 and the abutment portion 2 to reduce the difficulty of deformation, or the size of the guide channel along the second direction Y can be gradually increased only in the direction away from the adsorption body 1, or the groove 21 can be provided at the junction of the adsorption body 1 and the abutment portion 2, and the size of the guide channel along the second direction Y can be gradually increased in the direction away from the adsorption body 1. The specific setting structure can be adjusted according to the specific structure of the negative pressure adsorption device 100.

[0067] See also Figures 3 to 7 After the elastic switch valve 300 is opened by pressing down the negative pressure adsorption device 100, the inlet K1 of the adsorption body 1 is connected with the injection hole of the battery 200. At this time, in order to facilitate the discharge of the gas in the battery 200 from the channel 11 of the adsorption body 1, in some optional embodiments, the adsorption body 1 is provided with a groove 121 on the end surface 12 facing the abutment portion 2 in the first direction X, and the groove 121 is connected with the inlet K1, and the abutment portion 2 is at least arranged around the outer periphery of the groove 121.

[0068] By providing a groove 121 on the end surface 12 of the adsorption body 1 facing the abutment portion 2 in the first direction X, the groove 121 is located in the flow guide channel and is connected to the inlet K1, so that the groove 121 can play a role of confluence, so that the gas in the flow guide channel is converged to the inlet K1 of the adsorption body 1 through the groove 121, which is more convenient for achieving the confluence and discharge of the gas in the battery 200. In addition, since the groove 121 is provided on the adsorption body 1, when the negative pressure adsorption device 100 is set on the battery end cover 210, the position offset of the negative pressure adsorption device 100 and the battery end cover 210 can also be compatible, which makes the operation more convenient and the cost is low.

[0069] It is understandable that the groove 121 can be configured in a variety of structures.

[0070] See also Figure 8 In some embodiments, there are multiple grooves 121, and the multiple grooves 121 are radially extended relative to the inlet K1. By providing multiple grooves 121, it can better play the role of confluence, and can also further accommodate the positional offset between the negative pressure adsorption device 100 and the battery end cover 210, thereby improving applicability.

[0071] When multiple grooves 121 are radially extended relative to the inlet K1, their distribution is more uniform, and the confluence can be reliably achieved through the grooves 121. The valve body 310 can also be reliably pressed through the adsorption body 1 to ensure that the valve is always kept open during the formation process to achieve a better formation effect.

[0072] See also Fig. 9 and Fig.10In other optional embodiments, the plurality of grooves 121 are arranged in concentric rings relative to the inlet K1, and two adjacent grooves 121 are interconnected. That is, the plurality of grooves 121 can also be arranged in concentric rings relative to the inlet K1 and are interconnected to converge the gas to the inlet K1 of the adsorption body 1, and on this basis, the adsorption body 1 can also realize reliable pressure on the valve body 310, ensuring that the valve is always kept open during the formation process, so as to have a better formation effect.

[0073] After the gas converges to the inlet K1 of the adsorption body 1, it will flow out to the outlet K2 of the adsorption body 1 through the channel 11 of the adsorption body 1. To facilitate the discharge of the gas from the adsorption body 1, in some optional embodiments, the channel 11 includes a connected first section 111 and a second section 112. The first section 111 is arranged closer to the inlet K1 relative to the second section 112, and the diameter of the first section 111 is smaller than the diameter of the second section 112, so that it is easier to form a negative pressure to quickly discharge the gas from the negative pressure adsorption device 100.

[0074] Optionally, the channel 11 also includes a third section 113, which is connected between the first section 111 and the second section 112. The diameter of the third section 113 is gradually set from the first section 111 to the second section 112, so that a transition structure can be formed between the first section 111 and the second section 112, so as to more reliably realize the discharge of gas in the battery 200 during the formation process.

[0075] An embodiment of the present application also provides a formation system for the formation of a battery 200. The formation system includes a negative pressure source and a negative pressure adsorption device 100. The negative pressure adsorption device 100 is arranged corresponding to the injection hole of the battery 200 to collect the formation exhaust gas of the battery 200. The negative pressure source is connected to the negative pressure adsorption device 100 to provide a negative pressure environment for the negative pressure adsorption device 100.

[0076] Since the formation system in the embodiment of the present application includes the negative pressure adsorption device 100 in the above embodiment, it has the technical effect of the negative pressure adsorption device 100 in the above embodiment, and the same parts are not repeated here. Among them, the negative pressure adsorption device 100 is arranged toward the injection hole of the battery 200, and absorbs the formation exhaust gas of the battery 200 under the negative pressure environment. The negative pressure adsorption device 100 can be directly connected to the negative pressure source or indirectly connected.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A negative pressure adsorption device, characterized in that: include: An adsorption body having a channel and an inlet and an outlet communicating with the channel; The abutment portion is protrudingly connected to one side of the adsorption body in the first direction and is arranged around the inlet, wherein the height dimension of the abutment portion protruding from the adsorption body in the first direction is adjustable.

2. The negative pressure adsorption device according to claim 1, characterized in that: The abutment portion is configured as an elastic material body, and the negative pressure adsorption device includes a first state and a second state; In the first state, the abutment portion protrudes a first distance relative to the adsorption body along the first direction. In the second state, the abutment portion is in an elastic deformation state, and the abutment portion protrudes a second distance relative to the adsorption body along the first direction, and the second distance is smaller than the first distance.

3. The negative pressure adsorption device according to claim 2, characterized in that: The abutting portion and the adsorption body are configured as an integrated structure.

4. The negative pressure adsorption device according to claim 3, characterized in that: A groove is provided at the joint of the adsorption body and the abutting portion.

5. The negative pressure adsorption device according to claim 3, characterized in that: The abutting portion is formed with a guide channel communicating with the inlet, and along a direction away from the adsorption body, a size of the guide channel along a second direction gradually increases, and the second direction intersects with the first direction.

6. The negative pressure adsorption device according to any one of claims 1 to 5, characterized in that: The adsorption body is provided with a groove on the end surface facing the abutting portion in the first direction, the groove is communicated with the inlet, and the abutting portion is at least arranged around the outer periphery of the groove.

7. The negative pressure adsorption device according to claim 6, characterized in that: There are multiple grooves, and the multiple grooves are radially extended relative to the inlet; Alternatively, the plurality of grooves are distributed in concentric rings relative to the inlet, and two adjacent grooves are connected to each other.

8. The negative pressure adsorption device according to any one of claims 1 to 5, characterized in that: The channel includes a first section and a second section connected to each other. The first section is arranged closer to the inlet than the second section. The diameter of the first section is smaller than the diameter of the second section.

9. The negative pressure adsorption device according to claim 8, characterized in that: The channel also includes a third section connected between the first section and the second section, and the diameter of the third section is gradually changed in the direction from the first section to the second section.

10. A chemical formation system, characterized in that: It comprises the negative pressure adsorption device as described in any one of claims 1 to 9.

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