Formation device

Abstract

The utility model belongs to the technical field of formation devices, and discloses a formation device. The formation device comprises a backflow pipe, a discharging mechanism and a cup body, and the discharging mechanism is arranged in the backflow pipe and used for discharging electrolyte in the backflow pipe. The cup body is used for accommodating electrolyte sucked from the battery, and gas in the battery can flow towards the negative pressure device through the cup body and the return pipe. Through the formation device, a negative pressure environment beneficial to the formation of an SEI film can be efficiently formed in the battery, the compactness and the stability of the SEI film are improved, and the use performance of the battery is guaranteed. Meanwhile, the arrangement of the cup body can collect and temporarily store the electrolyte sucked into the formation device and reduce the amount of the electrolyte entering the return pipe, and the discharge mechanism can discharge the electrolyte sucked into the return pipe, so that the residual and crystallization phenomena of the electrolyte in key parts in the formation device, especially the return pipe, can be avoided, the blockage of the return pipe can be avoided, and the service life of the formation device is prolonged. The stable air exhaust performance is ensured, and a compact and stable SEI film can be formed.

Description

Technical Field

[0001] The utility model relates to the technical field of formation devices, in particular to a formation device. Background Art

[0002] During the formation process, a solid electrolyte interface (SEI) film forms on the surface of the anode. This film is crucial to the battery's performance and stability. A dense and stable SEI film protects the anode from consumption during the subsequent decomposition of the electrolyte and prevents graphite shedding, thereby improving battery performance and stability. Furthermore, a well-developed SEI film can reduce side reactions and gas generation during battery operation, extending the battery's lifespan.

[0003] Vacuuming the battery during the formation process helps create an oxygen-free, dry environment, which is conducive to the formation of a dense and stable SEI film. However, existing formation devices often extract electrolyte from the battery during the evacuation process. This electrolyte easily remains inside the formation device, not only flowing into the next batch of batteries, causing contamination and reduced battery performance, but also easily crystallizing inside the formation device, clogging the corresponding pipes, reducing the formation device's evacuation performance and failing to meet the needs of the normal formation process.

[0004] Therefore, a formation device is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a formation device that can avoid residual electrolyte inside, ensure the normal progress of the formation process, and guarantee the performance of the battery.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Formation equipment, including:

[0008] A return pipe, the return pipe being provided with a first pipe opening and a second pipe opening, the first pipe opening being used for connecting to a negative pressure device, and the second pipe opening being used for discharging the electrolyte in the return pipe;

[0009] a discharge mechanism, the discharge mechanism being used to drive the electrolyte in the reflux pipe to move toward the second pipe opening to discharge the electrolyte in the reflux pipe;

[0010] A cup body, one end of which is connected to the return pipe, and the other end of which is used to connect to the battery.

[0011] Preferably, the discharge mechanism includes a push rod, which is slidably arranged in the return pipe along the axial direction of the return pipe, and the push rod can slide in contact with the inner wall of the return pipe to push the electrolyte in the return pipe toward the second pipe opening, and a switch valve is provided at the second pipe opening; or,

[0012] The discharge mechanism includes a spiral rod, which is arranged in the return pipe and rotates along the axial direction of the return pipe. The spiral rod can rotate in contact with the inner wall of the return pipe to push the electrolyte in the return pipe toward the second pipe mouth, and a switch valve is provided at the second pipe mouth.

[0013] Preferably, the return pipe is a circular pipe or has a circular inner cavity.

[0014] Preferably, along the axial direction of the return pipe, the first pipe opening is arranged at one end of the return pipe, and the second pipe opening is arranged at the other end of the return pipe.

[0015] Preferably, the end of the return pipe provided with the second pipe opening is provided at a height lower than the end of the return pipe provided with the first pipe opening.

[0016] Preferably, the formation device further comprises a fixing frame and a flexible connecting pipe, the position of the cup body is adjustably mounted on the fixing frame, and the flexible connecting pipe is connected between the cup body and the reflux pipe.

[0017] Preferably, the fixing frame includes a first fixing member and a second fixing member, the two first fixing members are arranged in parallel, the second fixing member is fixedly connected between the two first fixing members, and the position of the cup body is adjustably limited and set between the two first fixing members.

[0018] Preferably, the first fixing member has a first through slot, and a connecting pipe opening is provided at each end of the cup body. One connecting pipe opening is limited to pass through the first through slot of one first fixing member to connect the cup body to the soft connecting tube, and the other connecting pipe opening is limited to pass through the first through slot of another first fixing member to connect the cup body to the battery.

[0019] Preferably, the first fixing member further has a second through slot, in which at least two bolts are adjustably arranged, one bolt is arranged on each side of each connecting pipe port, and the bolts can abut against the connecting pipe port to limit the position of the cup body.

[0020] Preferably, the formation device includes at least two cup bodies, and each cup body is used to connect to a corresponding battery.

[0021] The beneficial effects of the present invention are as follows: the aforementioned formation device can efficiently create a negative pressure environment within the battery that is conducive to the formation of the SEI film, thereby improving the density and stability of the SEI film and ensuring the battery's performance. Furthermore, the cup body can collect and temporarily store electrolyte drawn into the formation device, reducing the amount of electrolyte entering the reflux pipe. The discharge mechanism can discharge the electrolyte drawn into the reflux pipe, thereby preventing electrolyte residue and crystallization in key components within the formation device, particularly the reflux pipe, thereby preventing reflux pipe blockage, ensuring stable pumping performance, and facilitating the formation of a dense and stable SEI film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the formation device provided by the utility model;

[0023] Figure 2 It is a side view of the formation device provided by the utility model;

[0024] Figure 3 It is along Figure 2 Diagram of the internal structure of the middle BB;

[0025] Figure 4 yes Figure 1 A partial enlarged view of point A in the middle.

[0026] In the picture:

[0027] 1. Reflux pipe; 11. First pipe opening; 12. Second pipe opening; 13. Third pipe opening; 14. On / off valve;

[0028] 2. Screw rod;

[0029] 3. Drive motor;

[0030] 4. Soft connecting pipe;

[0031] 5. Cup body; 51. Connecting nozzle;

[0032] 6. First fixing member; 61. First through slot; 62. Second through slot;

[0033] 7. Second fixing member;

[0034] 8. Bolts. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0036] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," "fixed," and "abutted" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] The following is based on the attached Figure 1 To the attached Figure 4 The invention introduces a chemical formation device provided by the utility model.

[0040] like Figure 1 、 Figure 2 As shown, in this embodiment, the formation device primarily comprises a reflux pipe 1, a discharge mechanism, and a cup 5. The reflux pipe 1 and cup 5 are interconnected and connected to a negative pressure device. The cup 5 is connected to the battery. Driven by the negative pressure device, the gas within the battery is drawn out through the cup 5 and reflux pipe 1, creating an oxygen-free, dry environment that facilitates the formation of a dense and stable SEI film.

[0041] Specifically, in this embodiment, the return pipe 1 is provided with a first pipe opening 11 and a second pipe opening 12. The first pipe opening 11 is used to connect to the vacuum pipe of the negative pressure device, and the second pipe opening 12 is used to connect to the drain pipe, through which the electrolyte in the return pipe 1 can be discharged. The negative pressure device can generate suction, and the gas in the battery can be extracted through the vacuum pipe, the return pipe 1 and the cup body 5. During the gas extraction process, the electrolyte in the battery may be sucked into the formation device, and the cup body 5 can collect and temporarily store these electrolytes, reduce the phenomenon of the electrolyte being sucked into the return pipe 1, and help maintain the negative pressure environment during the formation process. Of course, when the pumping power is large, the electrolyte may still enter the return pipe 1 with the air flow, and it is necessary to periodically discharge the electrolyte through the discharge mechanism. As Figure 3 As shown, the discharge mechanism is provided in the return pipe 1 and can drive the electrolyte sucked into the return pipe 1 to move toward the second nozzle 12, thereby facilitating the discharge of the electrolyte sucked into the return pipe 1 due to gas extraction. Optionally, the second nozzle 12 is provided in the return pipe 1 in a vertically downward direction to facilitate the discharge of liquids such as electrolyte.

[0042] The above-mentioned formation device can efficiently create a negative pressure environment within the battery that is conducive to the formation of the SEI film, thereby improving the density and stability of the SEI film and ensuring the performance of the battery. At the same time, the arrangement of the cup body 5 can collect and temporarily store the electrolyte absorbed into the formation device, reducing the amount of electrolyte entering the reflux pipe 1. The discharge mechanism can discharge the electrolyte absorbed into the reflux pipe 1, thereby preventing the electrolyte from remaining and crystallizing in key components within the formation device, especially the reflux pipe 1, and preventing blockage of the reflux pipe 1, ensuring stable exhaust performance, and facilitating the formation of a dense and stable SEI film.

[0043] Specifically, if Figure 3 As shown, in this embodiment, the discharge mechanism includes a screw rod 2 and a drive motor 3, and the screw rod 2 has an external thread structure. The screw rod 2 is arranged in the return pipe 1 to rotate along the axial direction of the return pipe 1, and the drive motor 3 is transmission-connected to the screw rod 2, so that the screw rod 2 can rotate in contact with the inner wall of the return pipe 1, and the external thread structure can be in contact with the inner wall of the return pipe 1. When the screw rod 2 rotates along the thread direction of the external thread structure, the electrolyte can be pushed to move toward the second pipe mouth 12 in the return pipe 1. A switch valve 14 is provided at the second pipe mouth 12. By opening the switch valve 14, the residual electrolyte can be discharged. After discharge, the switch valve 14 can be closed without affecting the normal air extraction operation.

[0044] The return pipe 1 is a round tube or a pipe with a circular inner cavity that matches the spiral rod 2, so that the electrolyte can easily accumulate at the bottom of the return pipe 1, facilitating the discharge of the electrolyte. Of course, the circular inner cavity also makes it easier for the spiral rod 2 to rotate against the inner wall of the return pipe 1, achieving a better discharge effect for the electrolyte.

[0045] Optionally, in some other embodiments, the discharge mechanism may also adopt a push rod and a drive motor 3. The push rod is slidably arranged in the return pipe 1 along the axial direction of the return pipe 1, and the push rod can slide against the inner wall of the return pipe 1 to push the electrolyte to move toward the second nozzle 12 in the return pipe 1, and then be discharged from the drain pipe. At this time, as long as the cross-sectional shape of the inner cavity of the return pipe 1 can be set corresponding to the cross-sectional shape of the push rod close to the second nozzle 12, so that the push rod can fit against the inner wall of the return pipe 1, a good effect of discharging the electrolyte can be achieved. Therefore, in this embodiment, a suitable discharge mechanism can be selected according to the specific shape of the return pipe 1, or a suitable return pipe 1 can be selected according to the discharge mechanism. As long as the discharge effect of the electrolyte can be achieved, it falls within the scope of protection of the present utility model.

[0046] Preferably, in this embodiment, along the axial direction of the return pipe 1, the first pipe opening 11 is provided at one end of the return pipe 1, and the second pipe opening 12 is provided at the other end of the return pipe 1, so that the air extraction and the liquid discharge do not interfere with each other, and the effect of convenient cleaning of the return pipe 1 is achieved. For example, when cleaning, a cleaning agent can be injected into the return pipe 1 from the first pipe opening 11, and the switch valve 14 at the second pipe opening 12 is opened, so that the cleaning agent carries the electrolyte and other foreign matter in the return pipe 1 and is quickly discharged, thereby avoiding the phenomenon that some parts of the return pipe 1 cannot be cleaned. Of course, it is also possible to blow dry after cleaning, so that by blowing air into the return pipe 1 from the first pipe opening 11 and using the gas to blow out the cleaning agent or water from the second pipe opening 12, the return pipe 1 can be dried. Furthermore, the axial direction of the return pipe 1 is set at a certain angle to the horizontal direction, so that the setting height of the end of the return pipe 1 provided with the second pipe opening 12 is lower than the end of the return pipe 1 provided with the first pipe opening 11, thereby facilitating the discharge of liquids such as electrolyte and cleaning agent from the second pipe opening 12 under the action of gravity.

[0047] like Figure 1 、 Figure 3Shown, in the present embodiment, formation device also comprises fixed frame and flexible connecting pipe 4, and fixed frame is fixedly arranged, and cup 5 position is adjustable and is installed on fixed frame.Return pipe 1 is also provided with the 3rd mouth of pipe 13, and the 3rd mouth of pipe 13 places are provided with switch valve 14, one end of flexible connecting pipe 4 is connected to the 3rd mouth of pipe 13, and the other end is connected to cup 5, thereby cup 5 is communicated with return pipe 1.And flexible connecting pipe 4 itself is bendable and stretchable, thereby conveniently cup 5 is carried out the regulation of position.By regulating the position of cup 5, just can be connected cup 5 with battery easily, reduce the use difficulty of formation device.

[0048] For example, Figure 3 、 Figure 4 As shown, the fixing frame includes a first fixing member 6 and a second fixing member 7. The two first fixing members 6 are arranged in parallel, and the second fixing member 7 is fixedly connected between the two first fixing members 6, thereby fixedly connecting the two first fixing members 6. The cup body 5 is limitedly set between the two first fixing members 6 and can be adjusted along the length direction of the first fixing members 6, so as to facilitate connection with batteries of different sizes.

[0049] Specifically, a connecting nozzle 51 is provided at each end of the cup body 5. One connecting nozzle 51 is used to connect to the flexible connecting tube 4, and the other connecting nozzle 51 is used to connect to the battery. Both first fixing members 6 have a first through-slot 61. One connecting nozzle 51 of the cup body 5 is limitedly inserted through the first through-slot 61 of one first fixing member 6, while the other connecting nozzle 51 is limitedly inserted through the first through-slot 61 of the other first fixing member 6. Thus, the first through-slot 61 provides a certain degree of positioning for the connecting nozzles 51, allowing the cup body 5 to be both limited and adjustable along the length of the first through-slot 61.

[0050] Furthermore, the first fixing member 6 also has a second through slot 62, and at least two bolts 8 are arranged in the second through slot 62 in an adjustable manner. Figure 4 As shown, a bolt 8 is provided on each side of each connecting pipe port 51. The bolt 8 can abut against the connecting pipe port 51, so that the cup body 5 can be further limited along the length direction of the first through groove 61, thereby fixing the cup body 5 and avoiding abnormal phenomena such as air leakage caused by the movement of the cup body 5 during the vacuum process.

[0051] Of course, in this formation device, both one cup body 5 can be provided, and two, three or more cup bodies 5 can also be provided, and each cup body 5 is used to be connected to a corresponding battery, thereby improving the efficiency of the formation process. Exemplarily, in the present embodiment, the return pipe 1 is provided with four third pipe openings 13, and each third pipe opening 13 is correspondingly connected to a flexible connecting pipe 4, and each flexible connecting pipe 4 is correspondingly connected to a cup body 5, so that the formation device can simultaneously evacuate up to four batteries to complete the formation process, greatly improving the batch formation efficiency of the battery.

[0052] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A formation device, characterized in that: include: A return pipe (1), the return pipe (1) being provided with a first pipe opening (11) and a second pipe opening (12), the first pipe opening (11) being used for connecting to a negative pressure device, and the second pipe opening (12) being used for discharging electrolyte in the return pipe (1); a discharge mechanism, the discharge mechanism being used to drive the electrolyte in the reflux pipe (1) to move toward the second pipe opening (12) to discharge the electrolyte in the reflux pipe (1); A cup body (5), one end of the cup body (5) is connected to the return pipe (1), and the other end of the cup body (5) is used to connect to the battery.

2. The chemical formation device according to claim 1, characterized in that The discharge mechanism comprises a push rod, which is slidably arranged in the return pipe (1) along the axial direction of the return pipe (1), and the push rod can slide in contact with the inner wall of the return pipe (1) to push the electrolyte in the return pipe (1) toward the second pipe opening (12), and the second pipe opening (12) is provided with a switch valve (14); or, The discharge mechanism comprises a spiral rod (2), the spiral rod (2) being arranged in the return pipe (1) so as to rotate along the axial direction of the return pipe (1), and the spiral rod (2) being able to rotate in contact with the inner wall of the return pipe (1) so as to push the electrolyte in the return pipe (1) to move toward the second pipe opening (12), and a switch valve (14) is provided at the second pipe opening (12).

3. The chemical formation device according to claim 2, characterized in that The return pipe (1) is a circular pipe or the return pipe (1) has a circular inner cavity.

4. The chemical formation device according to claim 1, characterized in that Along the axial direction of the return pipe (1), the first pipe opening (11) is arranged at one end of the return pipe (1), and the second pipe opening (12) is arranged at the other end of the return pipe (1).

5. The chemical formation device according to claim 4, characterized in that The end of the return pipe (1) provided with the second pipe opening (12) is provided at a lower height than the end of the return pipe (1) provided with the first pipe opening (11).

6. The chemical formation device according to claim 1, characterized in that The formation device further comprises a fixing frame and a flexible connecting pipe (4); the cup body (5) is adjustably mounted on the fixing frame; and the flexible connecting pipe (4) is connected between the cup body (5) and the reflux pipe (1).

7. The chemical formation device according to claim 6, characterized in that The fixing frame comprises a first fixing member (6) and a second fixing member (7), the two first fixing members (6) are arranged in parallel, the second fixing member (7) is fixedly connected between the two first fixing members (6), and the position of the cup body (5) is adjustable and limited between the two first fixing members (6).

8. The chemical formation device according to claim 7, characterized in that The first fixing member (6) has a first through slot (61), and a connecting pipe opening (51) is provided at each end of the cup body (5). One of the connecting pipe openings (51) is limitedly arranged to pass through the first through slot (61) of one of the first fixing members (6) to connect the cup body (5) to the soft connecting tube (4), and the other connecting pipe opening (51) is limitedly arranged to pass through the first through slot (61) of another of the first fixing members (6) to connect the cup body (5) to the battery.

9. The chemical formation device according to claim 8, characterized in that: The first fixing member (6) further has a second through slot (62), in which at least two bolts (8) are arranged in an adjustable manner. One bolt (8) is arranged on each side of each connecting pipe opening (51), and the bolt (8) can abut against the connecting pipe opening (51) to limit the position of the cup body (5).

10. The chemical formation device according to any one of claims 1 to 9, characterized in that: The formation device comprises at least two cup bodies (5), and each cup body (5) is used for correspondingly connecting to one of the batteries.

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