CN220041970U

CN220041970U - Formation negative pressure cup and formation equipment

Info

Publication number: CN220041970U
Application number: CN202320579296.1U
Authority: CN
Inventors: 李佳宁; 葛启富; 崔桂荣; 朱梓瑞; 马浩伟; 江山秀树
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-11-17
Anticipated expiration: 2033-03-22

Abstract

The application relates to the technical field of battery manufacturing, and particularly discloses a formation negative pressure cup and a formation device. When the gas to be separated flows along the flow channel, the mixed electrolyte is intercepted and contained by the containing structure, and the intercepted electrolyte flows back to the inside of the battery, so that the risks of electrolyte loss and negative pressure pipe blockage are reduced.

Description

Formation negative pressure cup and formation equipment

Technical Field

The application relates to the technical field of batteries, in particular to a formation negative pressure cup and formation equipment.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.

In the production process of the battery, the formation process plays a key role in the quality of the battery. In the formation process, the gas generated in the battery cell is usually pumped into a negative pressure cup by using a vacuum pump to prevent the gas from gathering to affect the battery cell, however, in the process, the electrolyte in the battery cell is easily pumped into a negative pressure pipe between the vacuum pump and the negative pressure cup, so that electrolyte loss and negative pressure pipe blockage risk are increased.

Disclosure of Invention

In view of the above problems, the utility model provides a formation negative pressure cup and a formation device, which solve the problems of electrolyte loss and negative pressure pipe blockage risks.

A first aspect of the present utility model proposes a formation sub-pressure cup comprising:

the cup body is provided with a first communication port and a second communication port at intervals, the first communication port is used for entering gas to be separated and flowing out electrolyte, and the second communication port is used for discharging separated gas;

The separation assembly is arranged in the cup body and forms a flow passage together with the cup body, one end of the flow passage is communicated with the first communication port, the other end of the flow passage is communicated with the second communication port, and the inner wall of the cup body and/or the separation assembly forming the flow passage is provided with a containing structure which is used for containing electrolyte in gas to be separated and guiding the electrolyte to one side of the first communication port.

When the formation device with the formation negative pressure cup is used for carrying out formation operation on the battery, the first communication port is communicated with the battery, and the second communication port is communicated with a vacuum pump of the formation device. In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel through the first communication port, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure in the process of flowing along the flow channel, and the separated gas is discharged through the second communication port. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

In some embodiments of the present application, the separation assembly includes at least one separation plate, the edge of the separation plate includes a connecting portion and a hanging portion connected to each other, the connecting portion is connected to the inner wall of the cup, the hanging portion is spaced apart from the inner wall of the cup and forms a communication position, one side of the separation plate having the hanging portion is disposed obliquely toward a side near the first communication port, and spaces of the flow channels on opposite sides of the separation plate are communicated through the communication position. The inner space of the cup body is partitioned by the partition plate, so that a flow channel is formed in the cup body, the integral structure is simple, the processing and the manufacturing are convenient, and the manufacturing cost can be effectively reduced. In addition, the separation plate is obliquely arranged, so that separated electrolyte can flow back to the battery through the first communication port, and the loss of the electrolyte is further reduced.

In some embodiments of the present application, at least one accommodating structure is disposed on a side of the partition plate facing away from the second communication port, and the accommodating structure is a concave structure, and an opening of the concave structure is disposed opposite to an inflow side of the flow channel. Through setting up the accommodating structure into the concave structure to with the opening of concave structure and the flow direction setting in opposite directions of waiting to separate the gas, thereby make to wait to separate the gas and can strike in the concave structure along the in-process that the runner flows, make to wait to separate electrolyte in the gas and adhere to on the concave structure, with the realization to wait to separate the separation of electrolyte in the gas, and then can promote the separation effect to the electrolyte, further reduced the loss of electrolyte.

In some embodiments of the present application, the number of the accommodating structures is plural, and all the accommodating structures are disposed in a dispersed manner on the same side of the partition plate. Through setting up a plurality of accepting structures, further improved the separation effect of the electrolyte in the gas to be separated for the loss condition of electrolyte has obtained effectively reducing.

In some embodiments of the application, the recessed features are grooves or pits;

and/or the corner position of the concave structure is in arc transition;

and/or the first communication port is provided with a first axis, the second communication port is provided with a second axis, and the concave direction of the concave structure is arranged at a preset angle with the preset direction;

wherein the first axis is parallel to or coincides with the second axis, the preset direction is consistent with the direction of the first axis or the direction of the second axis, and the preset angle range is (0 degrees, 90 degrees).

Through setting the concave structure into recess or pit structure to the convenience of concave structure processing on the division board has been improved, the cost of manufacturing can effectively be reduced.

In addition, through setting the corner position of interior concave structure to the circular arc transition for after the formation, the vacuum pump stops taking out negative pressure, and the electrolyte of being intercepted can effectively flow out concave structure and flow back to the inside of battery via first communication port, has further reduced the loss of electrolyte.

In addition, the opening of the concave structure and the flowing direction of the gas to be separated are arranged in opposite directions, and through the arrangement of the included angle between the concave direction and the preset direction, the direction of the concave opening is more suitable for the flowing direction of the gas to be separated, the separating effect of the containing structure of the concave structure on the electrolyte in the gas to be separated is further improved, and the loss of the electrolyte in the formation process is further reduced.

In some embodiments of the present application, the number of the partition plates is at least two, all the partition plates are arranged at intervals along a preset direction, and the communication positions of two adjacent partition plates are staggered along a direction perpendicular to the preset direction, so that the flow channel is in a bent shape, wherein the first communication port has a first axis, the second communication port has a second axis, and the preset direction is consistent with the direction of the first axis or the direction of the second axis. By arranging at least two separation plates, the at least two separation plates and the cup body jointly form a bent runner, so that the length of the runner is increased, and the effect of separating electrolyte from the accommodating structure in the process of flowing gas to be separated in the runner is further improved.

In some embodiments of the application, the distance between the partition plate adjacent to the first communication port and the first communication port is in the range of [5mm,15mm ];

and/or the distance between the partition plate adjacent to the second communication port and the second communication port is in the range of [5mm,15mm ]. Through setting for the distance between first communication port and the division board, when guaranteeing to wait to separate gaseous internal electrolyte separation effect, can effectively reduce first communication port by the stifled condition, guaranteed to wait to separate gaseous can effectively enter into in the runner through first communication port and the inside of electrolyte backward flow to the battery after the separation through first communication port. In addition, through setting for the distance between second intercommunication mouth and the division board, effectively reduced the condition that the second intercommunication mouth was blocked up, guaranteed that the gas after the separation can flow out through the second intercommunication mouth, reduced the condition that leads to the battery to bulge because of gas can't discharge in the formation process.

In some embodiments of the present application, a projection direction is taken along an axial direction of the first communication port, a plane on which a radial cross section of the first communication port is located is taken as a projection plane, and a projection of the first communication port on the projection plane is at least partially located within a projection range of the partition plate adjacent to the first communication port on the projection plane. The projection of the first communication port on the projection surface is set to be at least partially positioned in the projection range of the partition plate adjacent to the first communication port on the projection surface, so that the partition plate can form effective shielding for the first communication port, the length of the flow channel is increased, and the effect of separating electrolyte from the accommodating structure in the process of flowing gas to be separated in the flow channel is further improved.

In some embodiments of the application, the angle between the divider plate and the inner wall of the cup ranges from (0 °,90 °); through setting up the contained angle between dividing plate and the inner wall of cup to make dividing plate slope to one side of first communication port, and then can make the electrolyte that separates flow to one side of first communication port smoothly, in order to realize carrying out the supply of electrolyte to the battery.

And/or in the communication position, a spacing distance is arranged between the suspension part and the inner wall of the cup body, the cup body has an inner cup size in the spacing direction, and the ratio of the spacing distance to the inner cup size is in the range of [0.5,0.8]. By setting the interval distance, the blocking condition of the interval position is reduced, so that the gas can effectively pass through the interval position, and the flow rate of the gas in the flow channel is ensured.

The second aspect of the application also provides a formation device comprising a formation sub-pressure cup as described above.

When the battery is subjected to formation operation, the first communication port of the formation negative pressure cup is communicated with the battery, and the second communication port is communicated with a vacuum pump of formation equipment. In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel through the first communication port, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure in the process of flowing along the flow channel, and the separated gas is discharged through the second communication port. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

FIG. 1 schematically illustrates a schematic structural view of a formation sub-ambient pressure cup according to one embodiment of the application;

FIG. 2 is a cross-sectional view of the portion A-A of the negative pressure forming cup shown in FIG. 1;

fig. 3 schematically shows a schematic structural view of a partition plate according to an embodiment of the present application;

fig. 4 schematically shows a schematic structural view of a partition plate according to an embodiment of the present application.

The reference numerals are as follows:

100. forming a negative pressure cup;

10. a cup body;

11. a main body portion; 12. an upper cover part; 121. a second communication port; 111. a first communication port;

20. a first connector;

30. a second connector;

40. a partition assembly;

41. a partition plate;

411. an accommodating structure; 412. a suspension section; 413. a connection part;

50. a flow passage;

60. a communication position;

m is a preset direction, and N is a concave direction.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In the production process of the battery, the formation process plays a key role in the quality of the battery. After the components in the battery are assembled, a formation process is required, and the formation is aimed at activating the battery to form a solid electrolyte interface film (solid electrolyte interface, SEI film for short) on the surface of the electrode, wherein the formation of the SEI film has a critical influence on the subsequent working performance of the battery. The specific process of battery formation is as follows: the negative pressure mechanism is communicated with the inside of the battery through a pipeline and presses the liquid injection hole of the battery through the suction nozzle, and the negative pressure mechanism can enable the inside of the battery to be in a negative pressure environment in the working process, so that negative pressure pumping and exhausting of the inside of the battery are realized.

The battery can generate a large amount of gas in the formation process, and if the gas generated by the battery can not be well discharged, the battery can bulge to influence the qualification rate of the product and the safety performance of the battery. Therefore, in the formation process, the gas generated in the battery is usually pumped into a negative pressure cup by a vacuum pump, but the electrolyte in the battery is also carried out by the gas and is easily pumped into a negative pressure pipe flowing between the vacuum pump and the negative pressure cup, so that the negative pressure pipe is blocked.

The inventor of the present application has noted that in the prior art, in order to avoid the negative pressure pipe from being blocked, a bent flow passage is provided in the accommodating cavity of the negative pressure cup, and the probability of directly sucking the electrolyte into the negative pressure pipe is reduced through the flow path, so that the risk of blocking the negative pressure pipe is reduced. However, the bent flow path has a poor effect of improving the direct suction of the electrolyte to the negative pressure pipe and the clogging of the negative pressure pipe.

In order to solve the problems that the electrolyte is directly sucked to the negative pressure pipe and the negative pressure pipe is blocked, the applicant researches and discovers that a separation component is arranged in a cup body of the formation negative pressure cup, a flow channel with two ends respectively communicated with a first communication port and a second communication port is formed in the cup body by utilizing the separation component, and a containing structure is arranged in the flow channel. In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel through the first communication port, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure in the process of flowing along the flow channel, and the separated gas is discharged through the second communication port. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

In some embodiments of the present application, as shown in fig. 1 to 4, the present application proposes a formation sub-pressure cup 100, where the formation sub-pressure cup 100 includes a cup body 10 and a separation component 40, a first communication port 111 and a second communication port 121 are spaced apart on the cup body 10, the first communication port 111 is used for entering gas to be separated and discharging electrolyte, and the second communication port 121 is used for discharging separated gas. The separation assembly 40 is disposed in the cup 10 and forms a flow channel 50 together with the cup 10, one end of the flow channel 50 is communicated with the first communication port 111, the other end of the flow channel 50 is communicated with the second communication port 121, the inner wall of the cup 10 forming the flow channel 50 is provided with a containing structure 411, or the separation assembly 40 is provided with a containing structure 411, or the inner wall of the cup 10 forming the flow channel 50 and the separation assembly 40 are provided with containing structures 411, and the containing structure 411 is used for containing electrolyte in gas to be separated and guiding the electrolyte to one side of the first communication port 111.

It should be understood that, in the embodiment of the present application, the accommodating structure 411 is used for accommodating the electrolyte in the gas to be separated, that is, when the negative pressure device is used to suck the battery, the gas to be separated mixed with the electrolyte enters the inside of the negative pressure forming cup 100 through the first communication port 111, the electrolyte is separated from the gas during the flowing process of the flow channel 50, is intercepted by the accommodating structure 411 and is accommodated by the accommodating structure 411, and when the sucking operation is finished, the accommodated electrolyte can flow out from the accommodating structure 411.

In the embodiment of the present application, the accommodating structure 411 is used to guide the electrolyte to the side of the first communication port 111, that is, after the formation is completed, the pumping operation is completed, the electrolyte accommodated in the accommodating structure 411 flows out from the accommodating structure 411, and during the flowing out, the accommodating structure 411 can guide the flowing electrolyte so that the electrolyte flows in the direction of the first communication port 111, so that the electrolyte can smoothly flow back into the battery.

When the formation equipment with the formation negative pressure cup 100 performs formation on the battery, the negative pressure formation cup is arranged at the top of the battery, wherein the first communication port 111 of the negative pressure formation cup is communicated with the battery, the second communication port 121 of the negative pressure formation cup is communicated with a vacuum pump of the formation equipment, and meanwhile, the second communication port 121 is positioned above the first communication port 111.

In addition, as shown in fig. 2, the separation component 40 is disposed inside the cup body 10, the inner space of the cup body 10 is separated by the separation component 40, the inner wall of the cup body 10 and the partition component 40 are surrounded to form the flow channel 50, the gas to be separated is at least blocked by the containing structure 411 in the process of flowing along the flow channel 50, the electrolyte energy mixed in the gas to be separated is consumed and condensed in the containing structure 411, thereby realizing separation of the electrolyte from the gas to be separated, so that after the formation process is finished, the electrolyte backflow contained in the containing structure 411 is realized to be supplemented to the battery, the loss of the electrolyte is effectively reduced, and the blocking condition caused by the electrolyte entering the negative pressure tube for crystallization is also reduced.

In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel 50 through the first communication port 111, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure 411 in the process of flowing along the flow channel 50, and the separated gas is discharged through the second communication port 121. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port 111 under the action of self gravity, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

In some embodiments of the present application, the cup body 10 of the negative pressure formation cup is of an integrated structure, the first communication port 111 and the second communication port 121 are provided on the cup body 10, respectively, and the partition member 40 is provided inside the cup body 10, and by providing the cup body 10 as an integrated structure, the assembly process of the cup body 10 can be simplified, and the assembly efficiency can be effectively improved. In addition, the cup body 10 is provided with an integrated structure, so that the air leakage condition at the assembling position can be reduced, and the overall sealing performance of the negative pressure cup can be effectively improved.

In some embodiments of the present application, as shown in fig. 1 and 2, the cup body 10 of the negative pressure forming cup is of a split structure, and includes a main body 11 and an upper cover 12, wherein the main body 11 forms a cup structure with an opening, the opening is located at the top of the main body 11, the upper cover 12 is detachably engaged with the main body 11 and closes the opening of the main body 11 (a corresponding sealing structure, such as a sealing gasket, is required to be disposed at a combining position of the two structures), a first communication port 111 is disposed on the main body 11, a second communication port 121 is disposed on the upper cover 12, and a partition assembly 40 is disposed in a space formed by the upper cover 12 and the main body 11. The cup body 10 is provided with a split structure, so that the inside of the cup body 10 is convenient to clean, the condition of electrolyte crystallization in the cup body 10 is reduced, and the formation negative pressure cup 100 has a good separation effect on the electrolyte in the gas to be separated.

It should be noted that the formation sub-pressure cup 100 further includes a first connection member 20 and a second connection member 30, wherein the first connection member 20 is disposed in communication with the second communication port 121 and is used for connection with a vacuum pump of the formation equipment, and the second connection member 30 is disposed in communication with the first communication port 111 and is used for connection with a battery.

In some embodiments of the present application, as shown in fig. 2 to 4, the partition assembly 40 includes at least one partition plate 41, the edge of the partition plate 41 includes a connecting portion 413 and a suspending portion 412 connected to each other, the connecting portion 413 is connected to the inner wall of the cup body 10, the suspending portion 412 is spaced apart from the inner wall of the cup body 10 and forms the communication position 60, one side of the partition plate 41 having the suspending portion 412 is inclined toward the side near the first communication port 111, and spaces of the cup body 10 located at opposite sides of the partition plate 41 are communicated through the communication position 60.

It should be understood that the partition plate 41 is a plate-shaped member (may be a flat plate or a curved plate), wherein the plate-shaped member is disposed inside the cup 10 and is connected and fixed to the inside of the cup 10 through the connection portion 413, and the space inside the cup 10 is partitioned by the plate-shaped member so that the spaces on opposite sides of the plate-shaped member can communicate with the communication position 60 formed by the inner wall of the cup 10 only through the suspension area.

Wherein, connecting portion 413 and suspension portion 412 constitute the circumference edge of platy piece jointly, and wherein, connecting portion 413 is fixed with the inner wall connection of cup 10, and suspension portion 412 and the inner wall interval setting of cup 10.

The partition plate 41 having a plate shape is inclined in the cup 10, and one side is inclined to one side of the first communication port 111 and the other side is inclined to one side of the second communication port 121, wherein the side of the partition plate 41 inclined to the first communication port 111 is a hanging portion 412, that is, the communication position 60 formed between the partition plate 41 and the inner wall of the cup 10 is provided near the side of the first communication port 111. When the negative pressure formation cup 100 is used, the first communication port 111 is located at the bottom of the second communication port 121, and the side of the partition plate 41 having the suspension portion 412 is inclined to the side close to the first communication port 111, so that the separated electrolyte can flow back to the side of the first communication port 111 under the action of gravity, and the electrolyte can be effectively returned to the battery, so that the electrolyte in the battery can be supplied.

It should be noted that the partition plate 41 and the inner wall of the cup body 10 may be formed as a single piece, that is, manufactured by integral molding. The partition plate 41 and the inner wall of the cup body 10 may be of a split type structure, the cup body 10 and the partition plate 41 may be processed separately, and then connected and fixed by welding or bonding, etc., and it is necessary to ensure the sealing property of the joint position between the partition plate 41 and the inner wall of the cup body 10.

In the present embodiment, the inner space of the cup body 10 is partitioned by the partition plate 41, so that the flow passage 50 is formed in the cup body 10, and the entire structure is simple, and the processing and the manufacturing are facilitated, thereby effectively reducing the manufacturing cost.

In addition, the separator 41 is inclined so that the separated electrolyte is easily returned to the battery through the first communication port 111, and the loss of the electrolyte is further reduced.

In some embodiments of the present application, the partition plate 41 is disposed in the cup 10, and the connection portion 413 of the partition plate 41 is fixedly connected to the inner wall of the cup 10, so that the flow passage 50 is divided in the cup 10, and the flow passage 50 is formed together with the inner wall of the cup 10 by the partition plate 41. The containing structure 411 is disposed in the flow channel 50, the containing structure 411 may be disposed on the inner wall of the cup body 10, the containing structure 411 may be disposed on the partition plate 41, and the containing structure 411 may be disposed on both the inner wall of the cup body 10 and the partition plate 41.

In some embodiments of the present application, the accommodating structure 411 is disposed on the partition plate 41, and a side of the partition plate 41 facing away from the second communication port 121 has at least one accommodating structure 411, where the accommodating structure 411 is a protruding structure, and the protruding structure is disposed opposite to the flow direction of the gas to be separated. An accommodating groove is formed between two adjacent protruding structures. When the gas to be separated enters the flow channel 50 through the first communication port 111 during the formation operation of the battery, the gas to be separated collides with the convex structure and the accommodating groove, so that the electrolyte in the gas to be separated is energy-lost and condensed on the convex structure and the accommodating groove through the collision, the electrolyte is accommodated by the accommodating groove structure, and the separated gas continuously flows along the flow channel 50 and is discharged through the second communication port 121; after the completion of the formation operation, the electrolyte contained in the container flows along the flow path 50 in the direction of the first communication port 111 by the gravity, so that the electrolyte is returned to the battery.

In some embodiments of the present application, as shown in fig. 2, the accommodating structure 411 is disposed on the partition plate 41, and a side of the partition plate 41 facing away from the second communication port 121 has at least one accommodating structure 411, where the accommodating structure 411 is a concave structure, and an opening of the concave structure is disposed opposite to an inflow side of the flow channel 50.

It is to be understood that the partition plate 41 is provided on the inner wall of the cup 10 between the first communication port 111 for the inflow of the gas to be separated and the outflow of the separated electrolyte and the second communication port 121 for the outflow of the separated gas.

The housing structure 411 is provided on a side of the partition plate 41 facing away from the second communication port 121, and the housing structure 411 is provided as a recessed structure, and an opening of the recessed structure is provided opposite to a flow direction of the gas to be separated. When the gas to be separated enters the flow channel 50 through the first communication port 111 during the formation operation of the battery, the gas to be separated collides with the concave structure, so that the electrolyte in the gas to be separated loses energy and condenses on the concave structure through the collision, the concave structure is used for accommodating the electrolyte, and the separated gas continuously flows along the flow channel 50 and is discharged through the second communication port 121; after the formation operation is completed, the electrolyte contained in the concave structure flows in the direction of the first communication port 111 along the flow channel 50 by gravity, so that the electrolyte is refluxed into the battery.

Through setting the containing structure 411 into the concave structure to set up the opening of concave structure and the flow direction of the gas that waits to separate in opposite directions, realized waiting to separate the separation of electrolyte in the gas, and then can promote the separation effect to the electrolyte, further reduced the loss of electrolyte.

It should be noted that the depth direction of the concave structure may be opposite to the flow direction of the flow channel 50, or the depth direction of the concave structure may be disposed at an angle (the angle is acute) to the flow direction of the flow channel 50.

In some embodiments of the present application, as shown in fig. 3 or 4, the number of the accommodating structures 411 is plural, and all the accommodating structures 411 are disposed on the same side of the partition plate 41 in a dispersed manner.

Specifically, by providing the plurality of containing structures 411, the separation effect of the electrolyte in the gas to be separated is further improved, so that the loss of the electrolyte is effectively reduced.

It should be noted that, as shown in fig. 3, when the number of the accommodating structures 411 is plural and the accommodating structures 411 are grooves, the partition plate 41 having the plurality of accommodating structures 411 has an approximately washboard-like structure; as shown in fig. 4, when the number of the accommodating structures 411 is plural and the accommodating structures 411 are pits, the plural accommodating structures 411 are arranged in a matrix on the partition plate 41.

The number of the plurality of housing structures 411 may be 2, 3, 4, 5, 6, 7, 8, 9, or 10 pieces … ….

In some embodiments of the present application, as shown in fig. 3, the recess structure is a groove, the groove is formed on the partition plate 41, and the groove may be a straight line groove or a curved line groove. In addition, the area covered by the grooves on the partition plate 41 is large, and the separation effect on the electrolyte can be effectively improved.

In some embodiments of the present application, as shown in fig. 4, the recess structure is a pit, the pit is formed on the partition plate 41, and the pit may be a circular pit, a semicircular pit, a triangular pit, or the like. In addition, through setting the concave structure into the pit, can set for the structure of concave structure according to the separation requirement of difference, and then can satisfy the user demand of different application scenes.

In some embodiments of the present application, as shown in fig. 2, the corner positions of the concave structures are arc transitions. Through setting the corner position of interior concave structure to the circular arc transition for after the formation, the vacuum pump stops taking out negative pressure, and the electrolyte of being intercepted can effectively flow out concave structure and flow back to the inside of battery via first intercommunication mouth 111, has further reduced the loss of electrolyte.

In the embodiment of the present application, the first communication port 111 and the second communication port 121 have various arrangements on the cup 10, for example, the first communication port 111 and the second communication port 121 are coaxially disposed, and for example, the first communication port 111 and the second communication port 121 are not coaxially disposed (parallel or intersecting).

In some embodiments of the present application, as shown in fig. 2, the first communication port 111 has a first axis, the second communication port 121 has a second axis, the first axis is parallel to or coincides with the second axis, the recess direction of the recess structure is disposed at a preset angle with respect to the preset direction, the preset direction coincides with the direction of the first axis or the direction of the second axis, and the preset angle ranges from (0 ° to 90 °).

It should be understood that when the first axis is parallel to the second axis, the first communication port 111 and the second communication port 121 are not coaxially disposed, but the entering direction of the first communication port 111 is consistent with the exiting direction of the second communication port 121; when the first and second axes overlap, the first communication port 111 and the second communication port 121 are coaxially disposed, and the entering direction of the first communication port 111 coincides with the exiting direction of the second communication port 121.

Specifically, when the formation negative pressure cup 100 is mounted on the battery, the formation negative pressure cup 100 is located at the top of the battery and communicates with the battery through the first communication port 111, and the second communication port 121 is located above the first communication port 111 and is provided in communication with the vacuum pump of the formation apparatus. The partition plate 41 of the partition assembly is disposed inside the cup 10 and is inclined with respect to the cup 10, wherein the suspension portion 412 of the partition plate 41 is disposed obliquely to a side close to the first communication port 111, so that the flow channel 50 is disposed obliquely, and at this time, a side of the partition plate 41 facing away from the second communication port 121 is provided with a receiving structure 411 having a concave structure. As shown in fig. 2, M is a preset direction, N is a recess direction, a is an included angle between the recess direction and the preset direction, the preset direction is set along a vertical direction (both the first axis direction and the second axis direction are along the vertical direction), the recess direction of the recess structure is set at a preset angle with the preset direction, and an opening of the recess structure is set opposite to a flowing direction of an airflow to be separated in the flow channel 50, so that an acute angle (0 ° < preset angle < 90 °) is set between the recess direction and the preset direction, and thus the opening of the recess direction is obliquely set (downwardly inclined) to one side of the first communication port 111, so that after formation is completed, electrolyte contained in the recess structure can smoothly flow out of the recess structure to flow back into the battery through the first communication port 111.

The opening of the concave structure and the flowing direction of the gas to be separated are opposite to each other, and through the arrangement of the included angle between the concave direction and the preset direction, the direction of the concave opening is more suitable for the flowing direction of the gas to be separated, the separating effect of the containing structure 411 of the concave structure on the electrolyte in the gas to be separated is further improved, and the loss of the electrolyte in the formation process is further reduced.

It should be understood that when the value of the preset angle is 0 °, the opening of the concave structure is downward, and the flow direction of the flow channel 50 is set at an angle to the vertical direction, so that the accommodating structure 411 has poor effect on separating the electrolyte in the gas to be separated, and has weak accommodating capability on the electrolyte, which is easy to cause the situation that the electrolyte leaves the concave structure to be mixed with the gas again; when the value of the preset angle is greater than or equal to 90 °, the opening of the concave structure is horizontally or upwardly arranged, and the concave direction of the concave structure is seriously deviated from the flow direction of the flow channel 50, and at this time, the electrolyte cannot be separated and stored by the concave structure.

It should be noted that the angle value between the concave direction and the preset direction may be 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 ° … …

In some embodiments of the present application, the flow passage 50 formed by the partition plate assembly 40 and the cup body 10 together is a direct flow passage, and the first communication port 111 and the second communication port 121 communicate at both ends of the direct flow passage. The partition plate 41 of the partition assembly 40 is provided with a containing structure 411, the containing structure 411 is a concave structure, an opening of the concave structure is opposite to the inflow side of the flow channel 50, the concave structure contains electrolyte in gas to be separated in the formation process, and after the formation is finished, the electrolyte is guided to one side of the first communication port so as to realize the replenishment of the electrolyte of the battery.

In some embodiments of the present application, when the number of the partition plates 41 is one, the flow channel 50 is arranged in a C-shape, the first communication port 111 is located below the second communication port 121 and is arranged to communicate with one end of the flow channel 50 having the C-shape, and the second communication port 121 is located above the first communication port 111 and is arranged to communicate with the other end of the flow channel 50 having the C-shape. The flow channel 50 with the C-shaped structure increases the flow path of the gas to be separated in the flow channel 50, and improves the separation effect of the electrolyte in the gas to be separated.

In some embodiments of the present application, as shown in fig. 2, at least two partition plates 41 are provided, all partition plates 41 are disposed at intervals along a predetermined direction, and communication positions 60 of two adjacent partition plates 41 are disposed at intervals along a direction perpendicular to the predetermined direction so that the flow channel 50 is bent.

The bent shape of the flow channel 50 means that the flow channel 50 formed by the partition plate 41 and the cup body 10 has an S-shaped structure or a serpentine structure.

Specifically, when the formation negative pressure cup 100 is mounted on the battery, the formation negative pressure cup 100 is located at the top of the battery and communicates with the battery through the first communication port 111, and the second communication port 121 is located above the first communication port 111 and is provided in communication with the vacuum pump of the formation apparatus. As shown in fig. 2, M is a preset direction, the preset direction is set along a vertical direction (both the first axis direction and the second axis direction are along the vertical direction), all the partition plates 41 are set at intervals in the preset direction, each partition plate 41 of the partition assembly is set inside the cup 10 and is inclined with respect to the cup 10, wherein the suspension portion 412 of each partition plate 41 is set at an inclination to a side close to the first communication port 111, so that the flow channel 50 is in a serpentine structure, and a side of each partition plate 41 facing away from the second communication port 121 is provided with a receiving structure 411 having a concave structure. The recess direction of the recess structure is set at a preset angle to the preset direction, and the opening of the recess structure is set opposite to the flow direction of the airflow to be separated in the flow channel 50, so that the recess direction is set at an acute angle to the preset direction (0 ° < preset angle < 90 °), and the opening of the recess direction is set obliquely (set obliquely downward) to one side of the first communication port 111.

By providing at least two partition plates 41, the flow passage 50 is partitioned within the cup 10 by the at least two partition plates 41, thereby increasing the length of the flow passage 50, and further improving the effect of separating the electrolyte by the housing structure 411 in the process of flowing the gas to be separated within the flow passage 50.

It should be noted that, in the cup 10, the inclination angles of the respective partition plates 41 may be identical, partially identical, or completely different, and the inclination angles of the respective partition plates 41 may be set according to the specific shape of the cup 10.

In addition, the distance between adjacent two partition plates 41 may be identical, partially identical, or completely different in the preset direction.

In addition, when the number of the partition plates 41 is plural, the specific number may be two, three, four, five, six … …. When the number of partition plates 41 is plural, the total thickness of all the partition plates 41 is smaller than the inner height of the cup body 10 in the preset direction.

In some embodiments of the present application, as shown in fig. 2, L2 is a distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 in fig. 2, and a distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 ranges from [5mm,15mm ].

It is to be understood that, when the distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 is smaller than 5mm, the distance between the first communication port 111 and the partition plate 41 is too small, and electrolyte crystallization is liable to occur therebetween to cause clogging of the flow passage 50; when the distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 is greater than 15mm, the distance between the first communication port 111 and the partition plate 41 is excessively large, so that the flow path length of the flow channel 50 is limited, which is unfavorable for separation of the electrolyte in the gas to be separated.

Through setting up the distance between first communication port 111 and division board 41, when guaranteeing to wait to separate gaseous internal electrolyte separation effect, can effectively reduce first communication port 111 by the condition of jam, guaranteed to wait to separate gaseous can effectively enter into in the runner 50 through first communication port 111 and the inside of electrolyte backward flow to the battery after the separation through first communication port 111.

Note that, in the present embodiment, the distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 may be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm … mm.

In some embodiments of the present application, as shown in fig. 2, L1 is a distance between the partition plate 41 adjacent to the second communication port 121 and the second communication port 121, and a distance between the partition plate 41 adjacent to the second communication port 121 and the second communication port 121 ranges from [5mm,15mm ].

It is to be understood that, when the distance between the partition plate 41 adjacent to the second communication port 121 and the second communication port 121 is smaller than 5mm, the distance between the second communication port 121 and the partition plate 41 is too small, and electrolyte crystallization is liable to occur therebetween to cause clogging of the flow passage 50; when the distance between the partition plate 41 adjacent to the second communication port 121 and the second communication port 121 is greater than 15mm, the distance between the second communication port 121 and the partition plate 41 is excessively large, so that the flow path length of the flow channel 50 is limited, which is unfavorable for separation of the electrolyte in the gas to be separated.

By setting the distance between the second communication port 121 and the partition plate 41, the blocking situation of the second communication port 121 is effectively reduced, the separated gas is ensured to flow out through the second communication port 121, and the situation that the battery is inflated due to the fact that the gas cannot be discharged in the formation process is reduced.

Note that, in the present embodiment, the distance between the partition plate 41 adjacent to the second communication port 121 and the second communication port 121 may be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm … mm.

In some embodiments of the present application, the axis direction along the first communication port 111 is a projection direction, and the plane on which the radial cross section of the first communication port 111 is located is a projection plane, and the projection of the first communication port 111 on the projection plane is at least partially within the range of the projection of the partition plate 41 adjacent to the first communication port 111 on the projection plane.

By arranging the projection of the first communication port 111 on the projection plane to be at least partially within the projection range of the partition plate 41 adjacent to the first communication port 111 on the projection plane, the partition plate 41 can form effective shielding for the first communication port 111, the condition that the gas to be separated directly passes through the partition plate 41 and escapes from the second communication port 121 is reduced, and meanwhile, the length of the flow channel 50 is increased, so that the effect of separating the electrolyte by the accommodating structure 41 during the process of flowing the gas to be separated in the flow channel 50 is further improved.

In some embodiments of the present application, the angle between partition plate 41 and the inner wall of cup 10 ranges from (0 °,90 °).

It should be understood that, as shown in fig. 2, the first communication port 111 is located at the bottom of the cup body 10, the second communication port 121 is located at the top of the cup body 10, when the included angle between the partition plate 41 and the inner wall of the cup body 10 is equal to 0 °, the partition plate 41 is arranged along the vertical direction, at this time, the flow channel 50 formed by the partition plate 41 in the cup body 10 is bent in the vertical direction, at this time, the fluidity of the air flow is poor, and the air flow in the flow channel 50 is not facilitated; when the included angle between the partition plate 41 and the inner wall of the cup 10 is greater than or equal to 90 °, the partition plate 41 is disposed along the horizontal direction, but the partition plate 41 and the suspension portion 412 are inclined to the side close to the second communication port 121, at this time, the flow channel 50 formed by the partition plate 41 and the inside of the cup 10 is the same as the lift direction of the gas, and the flow velocity of the gas in the flow channel 50 is too fast, which is unfavorable for separating the gas to be separated, resulting in deterioration of the separation effect of the electrolyte.

By setting the angle between the inner walls of the cup body 10 of the partition plate 41, the partition plate 41 is inclined to the side of the first communication port 111, and the separated electrolyte can smoothly flow to the side of the first communication port 111, so that the electrolyte can be supplied to the battery.

Note that the angle between the partition plate 41 and the inner wall of the cup body 10 may take the values of 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 ° … ….

In some embodiments of the present application, at the communication location 60, the suspension 412 has a separation distance from the inner wall of the cup 10, and in the separation direction, the cup 10 has an in-cup dimension, and the ratio of the separation distance to the in-cup dimension ranges from [0.5,0.8].

It should be understood that, when the ratio of the spacing distance to the inner dimension of the cup is less than 0.5, in the spacing direction, the partition plate 41 cannot cover half of the inner dimension of the cup, and the gas to be separated entering the cup 10 through the first communication port 111 is easy to directly reach the position of the second communication port 121 without being guided by the partition plate 41, thereby failing to separate the electrolyte in the gas to be separated; when the ratio of the spacing distance to the inner dimension of the cup is in a range of more than 0.8, the partition plate 41 is relatively close to the inner wall of the cup 10 in the spacing direction, and the spacing region between the inner wall of the cup 10 and the partition plate 41 is liable to be clogged with electrolyte crystals.

Specifically, by setting the spacing distance, the blocking of the spacing position is reduced, so that the gas can effectively pass through the spacing position, and the flow rate of the gas in the flow channel 50 is ensured.

It should be noted that in the present embodiment, the ratio of the separation distance to the in-cup dimension may specifically be in the range of 0.5, 0.6, 0.7, … …, 0.8.

In addition, the distance between the partition plate 41 and the inner wall of the cup body 10 is not less than 1cm.

In some embodiments of the application, the cup 10 is a first corrosion barrier. By arranging the cup body 10 to be a first corrosion-resistant piece (such as a PP material piece or a Teflon material piece, etc.), the corrosion condition of electrolyte to the cup body 10 is reduced, and the service life of the negative pressure cup 100 is prolonged;

in some embodiments of the present application, the separation assembly 40 is a second corrosion barrier. Providing the partition assembly 40 as a second corrosion resistant member (e.g., PP material member or teflon material member, etc.) further extends the useful life of the formation sub-pressure cup 100.

The second aspect of the application also proposes a forming apparatus comprising a forming sub-pressure cup 100 as described above.

In the formation operation of the battery, the formation negative pressure cup 100 is provided with a first communication port 111 communicating with the battery and a second communication port 121 communicating with a vacuum pump of the formation apparatus. In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel 50 through the first communication port 111, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure 411 in the process of flowing along the flow channel 50, and the separated gas is discharged through the second communication port 121. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port 111, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

In an embodiment of the present application, as shown in fig. 1 to 4, the present application proposes a forming negative pressure cup 100 and a forming apparatus. The negative pressure formation cup 100 includes a cup body 10 and a separation assembly 40, wherein a first communication port 111 and a second communication port 121 are disposed on the cup body 10 at intervals, the first communication port 111 is used for entering gas to be separated and discharging electrolyte, and the second communication port 121 is used for discharging separated gas. The separation assembly 40 is disposed in the cup 10 and forms a flow channel 50 together with the cup 10, one end of the flow channel 50 is communicated with the first communication port 111, the other end of the flow channel 50 is communicated with the second communication port 121, the separation assembly 40 has a containing structure 411, and the containing structure 411 is used for containing electrolyte in the gas to be separated and guiding the electrolyte to one side of the first communication port 111.

Further, the separation assembly 40 includes at least a plurality of separation plates 41, all separation plates 41 are arranged at intervals along the preset direction, and the communication positions 60 of two adjacent separation plates 41 are staggered along the circumferential direction of the preset direction, so that the flow channel 50 is in a bent shape (S-shaped structure or serpentine structure). The edge of each partition plate 41 includes a connecting portion 413 and a suspending portion 412 connected, the connecting portion 413 is connected with the inner wall of the cup body 10, the suspending portion 412 is disposed at an interval with the inner wall of the cup body 10 and forms the communication position 60, one side of the partition plate 41 having the suspending portion 412 is disposed obliquely to the side close to the first communication port 111, and the spaces of the cup body 10 on the opposite sides of the partition plate 41 are communicated via the communication position 60.

Further, a plurality of receiving structures 411 are provided on a side of the partition plate 41 facing away from the second communication port 121, and all receiving structures 411 are disposed on the same side of the partition plate 41 in a dispersed manner. The accommodating structure 411 is a concave structure, and an opening of the concave structure is opposite to the flowing direction of the gas to be separated.

Further, the concave structure is a groove or a pit;

further, the corner position of the concave structure is in arc transition.

Further, the first communication port 111 has a first axis, the second communication port 121 has a second axis, and the recess direction of the recess structure is disposed at a predetermined angle with respect to the predetermined direction. The first axis is parallel to or coincides with the second axis, the preset direction is consistent with the direction of the first axis or the direction of the second axis, and the preset angle range is (0 degrees, 90 degrees).

Further, the distance between the partition plate 41 adjacent to the first communication port 111 and the first communication port 111 is in the range of 1cm.

Further, the distance between the partition plate 41 adjacent to the second communication port 121 and the first communication port 111 is in the range of 1cm.

Further, the axis direction along the first communication port is a projection direction, a plane where a radial cross section of the first communication port is located is a projection plane, and a projection of the first communication port on the projection plane is located in a projection range of the partition plate adjacent to the first communication port on the projection plane.

Further, the angle between the partition plate 41 and the inner wall of the cup 10 is in the range of (0 °,90 °).

Further, in the communication position 60, the suspending portion 412 has a spacing distance from the inner wall of the cup body 10, and in the spacing direction, the cup body 10 has an in-cup size, and the ratio of the spacing distance to the in-cup size ranges from [0.5,0.8].

Further, the cup 10 is a first corrosion barrier.

Further, the partition assembly 40 is a second corrosion resistant member.

When the formation device having the formation negative pressure cup 100 according to the present application is used to perform the formation operation on the battery, the first communication port 111 is provided in communication with the battery, and the second communication port 121 is provided in communication with the vacuum pump of the formation device. In the formation process, the vacuum pump pumps negative pressure, gas to be separated generated in the battery is pumped into the flow channel 50 through the first communication port 111, electrolyte mixed in the gas to be separated is intercepted and contained by the containing structure 411 in the process of flowing along the flow channel 50, and the separated gas is discharged through the second communication port 121. After the formation is finished, the vacuum pump stops pumping negative pressure, and the intercepted electrolyte flows back to the inside of the battery through the first communication port 111, so that the risks of electrolyte loss and electrolyte crystallization blocking of the negative pressure pipe are reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A formation sub-atmospheric cup, the formation sub-atmospheric cup comprising:

2. The negative pressure forming cup according to claim 1, wherein the partition assembly comprises at least one partition plate, the edge of the partition plate comprises a connecting part and a hanging part which are connected, the connecting part is connected with the inner wall of the cup body, the hanging part is arranged at intervals with the inner wall of the cup body and forms a communicating position, one side of the partition plate with the hanging part is obliquely arranged towards one side close to the first communicating opening, and the spaces of the flow channels on two opposite sides of the partition plate are communicated through the communicating position.

3. The negative pressure forming cup as claimed in claim 2, wherein at least one accommodating structure is provided on a side of the partition plate facing away from the second communication port, the accommodating structure is a concave structure, and an opening of the concave structure is disposed opposite to an inflow side of the flow passage.

4. The negative pressure forming cup according to claim 3, wherein the number of the accommodating structures is plural, and all the accommodating structures are disposed in a dispersed manner on the same side surface of the partition plate.

5. A formation sub-atmospheric pressure cup as defined in claim 3 wherein the recessed structure is a groove or a pit;

and/or the corner position of the concave structure is in arc transition;

6. The negative pressure forming cup according to claim 2, wherein the number of the partition plates is at least two, all the partition plates are arranged at intervals along a preset direction, and the communication positions of two adjacent partition plates are staggered along a direction perpendicular to the preset direction so that the flow passage is in a bent shape, wherein the first communication port is provided with a first axis, the second communication port is provided with a second axis, and the preset direction is consistent with the direction of the first axis or the direction of the second axis.

7. The negative pressure forming cup of claim 6, wherein a distance between the partition plate adjacent to the first communication port and the first communication port ranges from [5mm,15mm ];

and/or the distance between the partition plate adjacent to the second communication port and the second communication port is in the range of [5mm,15mm ].

8. The negative pressure cup according to any one of claims 2 to 7, wherein the projection direction is a projection direction along the axial direction of the first communication port, and a plane on which the radial cross section of the first communication port is located is a projection plane, and the projection of the first communication port on the projection plane is at least partially located within a range of the projection of the partition plate adjacent to the first communication port on the projection plane.

9. The forming sub-ambient pressure cup as claimed in any one of claims 2 to 7, wherein the separation plate is disposed at an angle ranging from (0 °,90 °);

and/or in the communication position, a spacing distance is arranged between the suspension part and the inner wall of the cup body, the cup body has an inner cup size in the spacing direction, and the ratio of the spacing distance to the inner cup size is in the range of [0.5,0.8].

10. A forming apparatus comprising a forming sub-pressure cup as claimed in any one of claims 1 to 9.