Suction nozzle assembly and negative pressure formation system

Abstract

The utility model relates to the technical field of negative pressure formation systems, and discloses a suction nozzle assembly and a negative pressure formation system. The suction nozzle assembly comprises a negative pressure suction nozzle and a liquid blocking piece, and a liquid injection butt joint opening is formed in the first end, in the first direction, of the negative pressure suction nozzle. The liquid blocking piece is movably arranged on the negative pressure suction nozzle in the first direction, a fence area is formed in the liquid blocking piece, a first opening is formed in the first end, in the first direction, of the fence area, a second opening is formed in the second end, in the first direction, of the fence area, and the liquid injection butt joint opening can enter the fence area through the second opening; the liquid blocking piece is used for moving relative to the negative pressure suction nozzle in the first direction under the action of external force, so that the liquid injection butt joint opening can move in the enclosure area in the first direction and can move to the first end of the enclosure area or leave the first end of the enclosure area through the first opening. Therefore, the protective film on the anti-explosion valve is separated from the liquid injection butt joint opening through the liquid blocking piece, the risk that the electrolyte is splashed to the protective film is avoided, and the problem that the protective film is provided with marks is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of a negative pressure forming system, and particularly relates to a nozzle assembly and a negative pressure forming system. Background Art

[0002] In the production process of lithium batteries, formation is required to activate the batteries. During the formation process, gases are generated inside the batteries. Therefore, while forming, it is also necessary to evacuate the air from the batteries to discharge the gases generated inside the batteries.

[0003] In the related art, for hard-shell batteries such as aluminum-shell batteries and steel-shell batteries, during the negative pressure formation stage of the batteries, the electrolyte is pumped upward through the negative pressure applied by the nozzle and enters the upper liquid collection cup. After the formation is completed, the negative pressure is removed, and the electrolyte will flow back into the battery.

[0004] However, during the negative pressure formation process, the electrolyte will pass through the connection between the battery liquid injection port and the nozzle, which will cause the electrolyte to remain at the connection. After the formation is completed, the nozzle needs to leave the liquid injection port. During the process of the nozzle leaving the liquid injection port, the electrolyte will splash onto the surface of the battery cover plate. Since an explosion-proof valve is provided at a position on the battery cover plate relatively close to the liquid injection port and there is a protective film above the explosion-proof valve, it is easier for the electrolyte to splash onto the protective film, that is, there is a risk that the electrolyte splashes onto the protective film, so that it is easier for the protective film to have indelible marks after standing at high temperature. And the presence of marks on the protective film will result in unqualified batteries, thus reducing the qualified rate of the batteries produced in batches.

[0005] Therefore, it is urgent to avoid the risk of marks on the surface of the protective film on the explosion-proof valve. Summary of the Utility Model

[0006] To solve the deficiencies of the above-mentioned prior art, the utility model provides a nozzle assembly. The liquid blocking member separates the protective film on the explosion-proof valve from the liquid injection interface, so that the liquid blocking member can block the splashing electrolyte, avoiding the risk of the electrolyte splashing onto the protective film, avoiding the problem of marks remaining on the protective film, and improving the qualified rate of the batteries produced in batches.

[0007] The technical effects to be achieved by the utility model are realized through the following aspects:

[0008] In the first aspect, the utility model provides a nozzle assembly, including:

[0009] A negative pressure nozzle, a liquid injection interface is formed at a first end of the negative pressure nozzle along a first direction; and

[0010] a liquid blocking member, the liquid blocking member being movably arranged on the negative pressure suction nozzle along the first direction, the liquid blocking member forming an enclosure area inside, the enclosure area forming a first opening at a first end along the first direction, the enclosure area forming a second opening at a second end along the first direction, and the liquid injection docking port being able to enter the enclosure area through the second opening;

[0011] Among them, the liquid blocking member is used to move relative to the negative pressure suction nozzle along the first direction under the action of external force, so that the liquid injection docking port can move along the first direction within the enclosed area, and can move to the first end of the enclosed area or leave the first end of the enclosed area through the first opening.

[0012] In some implementations, the negative pressure nozzle includes a nozzle body and a limiting portion, the liquid injection docking port is formed at a first end of the nozzle body along the first direction, and the limiting portion is connected to the nozzle body;

[0013] The liquid blocking part includes a liquid blocking body and a stop portion, the liquid blocking body is movably arranged on the limiting portion along the first direction, the enclosure area is formed in the liquid blocking body, the stop portion is connected to the liquid blocking body, the stop portion is movably arranged on the nozzle body along the first direction, and the stop portion is arranged on the side of the limiting portion away from the first end of the nozzle body.

[0014] In some implementations, the liquid blocking body is gap-matched with the negative pressure nozzle, and the stopper is gap-matched with the negative pressure nozzle.

[0015] In some implementations, the limiting portion is annular; and / or,

[0016] The stopper is annular.

[0017] In some implementations, the stop portion protrudes from the inner side of the liquid blocking body, the limiting portion is connected to the outer side of the nozzle body, the liquid blocking body is movably mounted on the outer side of the limiting portion along the first direction, and the stop portion is movably mounted on the outer side of the nozzle body along the first direction.

[0018] In some implementations, the negative pressure nozzle and / or the liquid blocking member are elastic structures.

[0019] In some implementations, a guide arc surface or a guide slope surface is formed at a connection between the liquid blocking body and the stop portion.

[0020] In some implementations, the nozzle assembly further includes an elastic member, wherein the elastic member is respectively connected to the negative pressure nozzle and the liquid blocking member, and when the liquid injection docking port moves to the first end of the enclosure area, the elastic member is in a compressed state.

[0021] In some implementations, a movable stroke of the injection docking port along the first direction within the enclosure area is set to any value between 3 mm and 10 mm.

[0022] In the second aspect, the utility model provides a negative pressure formation system, comprising a battery and a nozzle assembly as described in any one of claims 1 to 4, wherein the battery comprises a battery cover, the battery cover is formed with a liquid injection port, the first end of the negative pressure nozzle along the first direction is used to abut against the battery cover, the liquid injection docking port is used to cover the liquid injection port, and the first end of the liquid blocking member along the first direction is used to abut against the battery cover.

[0023] In summary, the utility model has at least the following benefits:

[0024] In the nozzle assembly provided by the utility model, in the initial stage when the negative pressure nozzle leaves the battery cover, the liquid blocking member remains in contact with the battery cover, and the liquid injection interface moves from the first end of the enclosure area to the second end of the enclosure area, specifically, the liquid injection interface moves from one end of the enclosure area adjacent to the battery cover to the end of the enclosure area away from the battery cover, so that the liquid injection interface is always located in the enclosure area in the above-mentioned initial stage; because the electrolyte first splashes out from the liquid injection interface during the above-mentioned movement process, and then stops splashing, and the liquid injection interface is located in the enclosure area at this time, and the liquid blocking member remains in contact with the battery cover, the liquid blocking member separates the protective film on the explosion-proof valve from the liquid injection interface, so that the liquid blocking member can block the splashing electrolyte, thereby avoiding the risk of electrolyte splashing to the protective film, avoiding the problem of leaving marks on the protective film, and improving the qualified rate of batteries produced in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic top view of a nozzle assembly of some embodiments;

[0026] Figure 2 for Figure 1 The schematic cross-sectional view of the nozzle assembly shown along line AA;

[0027] Figure 3 for Figure 1 A schematic cross-sectional view of the nozzle assembly shown in use;

[0028] Figure 4 for Figure 1 Another schematic cross-sectional view of the nozzle assembly along line AA shown;

[0029] Figure 5 for Figure 1 Another schematic cross-sectional view of the suction nozzle assembly when in use is shown.

[0030] Markings in the figure:

[0031] 10. Nozzle assembly;

[0032] 100. Negative pressure nozzle; 110. Nozzle body; 111. Contact surface; 101. Liquid injection interface; 120. Limiting part; 130. Mounting part; 102. Mounting groove;

[0033] 200. Liquid blocking member; 210. Liquid blocking body; 201. Enclosure area; 202. First opening; 203. Second opening; 220. Stopping part;

[0034] 300. Elastic member;

[0035] 20. Battery;

[0036] 400. Battery cover plate; 401. Liquid injection port;

[0037] 500. Explosion-proof valve;

[0038] 600. Protective film. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are some but not all of the embodiments of the present utility model.

[0040] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0041] Example 1:

[0042] Please refer to Figures 1 to 3 , the nozzle assembly 10 of the present utility model includes a negative pressure nozzle 100 and a liquid blocking member 200.

[0043] Among them, a liquid injection docking port 101 is formed at the first end of the negative pressure suction nozzle 100 along the first direction. The second end of the negative pressure suction nozzle 100 along the first direction is used to install the pipeline of the negative pressure source, and the pipeline of the negative pressure source is communicated with the liquid injection docking port 101. The first direction is the extension direction of the negative pressure suction nozzle 100, that is, the first direction is the length direction of the negative pressure suction nozzle 100. The liquid injection docking port 101 is used to cover the liquid injection port 401 on the battery cover plate 400 during negative pressure formation and is communicated with the liquid injection port 401, so that the negative pressure source can evacuate the battery 20 through the liquid injection docking port 101 and the liquid injection port 401 to remove the gas generated inside the battery 20 due to formation. The first end of the negative pressure suction nozzle 100 along the first direction is used to abut against the battery cover plate 400. Specifically, the end face of the negative pressure suction nozzle 100 provided with the liquid injection docking port 101 is the abutting face 111. The abutting face 111 is used to abut against the battery cover plate 400 during negative pressure formation, that is, the abutting face 111 is used to abut against the battery cover plate 400 during evacuation. The abutting face 111 is preferably but not limited to a plane, so that the abutting face 111 fits the battery cover plate 400, improving the sealing performance between the negative pressure suction nozzle 100 and the battery cover plate 400, and thus improving the evacuation efficiency. It should be emphasized that the abutting face 111 is not limited to a plane. For example, in some embodiments, the abutting face 111 can also be an arc surface, a wavy surface or an irregular surface. Preferably, an installation hole is formed at the second end of the negative pressure suction nozzle 100 along the first direction. The installation hole is communicated with the liquid injection docking port 101, and the installation hole is tightly fitted and connected with the pipeline of the negative pressure source. Preferably, a step is provided in the installation hole, and the step is used for the installation limit of the pipeline of the negative pressure source. Preferably, the negative pressure source is a vacuum pump.

[0044] Further, the liquid blocking member 200 is of an annular structure. The liquid blocking member 200 is movably arranged on the negative pressure suction nozzle 100 along the first direction. A surrounding area 201 is formed inside the liquid blocking member 200. A first opening 202 is formed at the first end of the surrounding area 201 along the first direction, and a second opening 203 is formed at the second end of the surrounding area 201 along the first direction. The liquid injection docking port 101 can enter the surrounding area 201 through the second opening 203, so that the liquid injection docking port 101 is located inside the surrounding area 201. The liquid blocking member 200 is used to move relative to the negative pressure suction nozzle 100 along the first direction under the action of an external force, so that the liquid injection docking port 101 can move inside the surrounding area 201 along the first direction and can move to the first end of the surrounding area 201 or leave the first end of the surrounding area 201 through the first opening 202. It can be understood that the above external force can be the self-gravity of the liquid blocking member 200 or other forces applied to the liquid blocking member 200.

[0045] In this embodiment, during the negative pressure formation of the battery, the battery cover plate 400 is arranged upward, and the pipeline of the negative pressure source drives the negative pressure suction nozzle 100 to move along the first direction towards the battery cover plate 400. Since the liquid blocking member 200 can be maintained at the first position under the action of an external force (such asFigure 2 As shown, the first end of the liquid baffle 200 in the first direction first contacts the battery cover plate 400. Under the action of the force applied by the battery cover plate to the liquid baffle 200, the liquid baffle 200 moves relative to the negative pressure suction nozzle 100 in the first direction to the second position, and the first end of the liquid baffle 200 in the first direction abuts against the battery cover plate 400 (as Figure 3 shown). At the same time, the abutting surface 111 moves in the first direction to abut against the battery cover plate 400. The liquid injection docking port 101 moves in the first direction within the enclosure area 201 and moves to the first end of the enclosure area 201 through the first opening 202, so that the liquid injection docking port 101 corresponds and communicates with the liquid injection port 401 on the battery cover plate 400. The negative pressure suction nozzle 100 evacuates the inside of the battery 20 through the liquid injection port 401 to discharge the gas generated by the formation of the battery 20. When the negative pressure formation is completed, the negative pressure of the negative pressure suction nozzle 100 is removed, and the pipeline of the negative pressure source drives the negative pressure suction nozzle 100 to leave the battery cover plate 400 in the first direction. During the process of the negative pressure suction nozzle 100 leaving the battery cover plate 400, the negative pressure suction nozzle 100 first leaves the battery cover plate 400, while the liquid baffle 200 remains in contact with the battery cover plate 400 under the action of an external force, so that the negative pressure suction nozzle 100 moves relative to the liquid baffle 200 in the first direction, and the liquid injection docking port 101 moves from the end of the enclosure area 201 adjacent to the battery cover plate 400 to the end of the enclosure area 201 away from the battery cover plate 400. Specifically, the liquid injection docking port 101 moves from the lower end of the enclosure area 201 to the upper end of the enclosure area 201. When the liquid injection docking port 101 moves within the enclosure area 201, electrolyte splashes out from the liquid injection docking port 101. During the above movement process, the liquid injection docking port 101 remains within the enclosure area 201, and at the same time, the liquid baffle 200 remains in contact with the battery cover plate 400, so that the protective film 600 of the explosion-proof valve 500 is isolated from the liquid injection docking port 101, and the liquid baffle 200 blocks the splashing electrolyte to prevent the electrolyte from splashing onto the protective film 600 of the explosion-proof valve 500.

[0046] That is to say, in the initial stage when the negative pressure suction nozzle 100 leaves the battery cover plate 400, that is, when the negative pressure suction nozzle 100 just leaves the battery cover plate 400, the liquid baffle 200 remains in contact with the battery cover plate 400. The negative pressure suction nozzle 100 moves relative to the liquid baffle 200, and the liquid injection docking port 101 moves from the lower end of the enclosure area 201 to the upper end of the enclosure area 201. Electrolyte splashes out from the liquid injection docking port 101 of the negative pressure suction nozzle 100, and then the electrolyte stops splashing. Since the liquid baffle 200 abuts against the battery cover plate 400 at this time and the liquid injection docking port 101 is located within the enclosure area 201, the liquid baffle 200 can block the splashing electrolyte to prevent the electrolyte from splashing onto the protective film 600 on the explosion-proof valve 500.

[0047] It can be understood that from the initial stage when the negative pressure suction nozzle 100 leaves the battery cover plate 400 to the moment when the negative pressure suction nozzle 100 leaves the battery cover plate 400, it ends until the electrolyte stops splashing.

[0048] It should be noted that the moving stroke of the liquid injection connection port 101 along the first direction within the enclosure area 201 can be adjusted according to the actual production situation, so as to ensure that the liquid injection connection port 101 can be located within the enclosure area 201 before the electrolyte stops splashing, and the liquid blocking member 200 always abuts against the battery cover plate 400.

[0049] In some preferred embodiments, the moving stroke of the liquid injection connection port 101 along the first direction within the enclosure area 201 is set to any value between 3 mm and 10 mm. For example, the moving stroke of the liquid injection connection port 101 along the first direction within the enclosure area 201 is set to 3 mm, 5 mm, 8 mm or 10 mm. Since the moving stroke of the liquid injection connection port 101 along the first direction within the enclosure area 201 is large enough, when the liquid injection connection port 101 moves from the first end of the enclosure area 201 towards the second end along the first direction, the negative pressure suction nozzle 100 will not drive the liquid blocking member 200 to move along the first direction, so that the liquid blocking member 200 can maintain the state of abutting against the battery cover plate 400 to ensure the liquid blocking effect of the liquid blocking member 200. For example, in some embodiments, after the negative pressure suction nozzle 100 moves up 5 mm, the electrolyte stops splashing, and the moving stroke of the liquid injection connection port 101 within the enclosure area 201 is set to be greater than or equal to 5 mm, so that the liquid injection connection port 101 is within the enclosure area 201 when the electrolyte splashes out, and the liquid blocking member 200 abuts against the battery cover plate 400 before the electrolyte stops splashing.

[0050] Preferably, the first direction is perpendicular to the battery cover plate 400. Of course, the first direction is not limited to being perpendicular to the battery cover plate 400. For example, in some embodiments, the first direction can also be inclined to the battery cover plate 400.

[0051] In some of these embodiments, after the liquid blocking member 200 blocks the splashing electrolyte, as the negative pressure suction nozzle 100 continues to move in the direction away from the battery cover plate 400, the negative pressure suction nozzle 100 will drive the liquid blocking member 200 to leave the battery cover plate 400. At this time, since the electrolyte has stopped splashing, the liquid blocking member 200 leaving the battery cover plate 400 will not affect the liquid blocking effect.

[0052] It should be emphasized that in some other embodiments, after the liquid blocking member 200 blocks the splashing electrolyte, as the negative pressure nozzle 100 continues to move away from the battery cover plate 400, the negative pressure nozzle 100 will not drive the liquid blocking member 200 away from the battery cover plate 400, resulting in the injection liquid connection port 101 disengaging from the enclosure area 201. However, during the process of the negative pressure nozzle 100 leaving the battery cover plate 400, the injection liquid connection port 101 still has a process of moving from the first end of the enclosure area 201 to the second end of the enclosure area 201. Therefore, this embodiment is still within the protection scope of the present utility model. It can be understood that in this embodiment, after the injection liquid connection port 101 disengages from the enclosure area 201, the liquid blocking member 200 can be driven away by a driving structure or manually.

[0053] For the above-mentioned nozzle assembly 10, in the initial stage when the negative pressure nozzle 100 leaves the battery cover plate 400, the liquid blocking member 200 remains in a state of abutting against the battery cover plate 400. At the same time, the injection liquid connection port 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201. Specifically, the injection liquid connection port 101 moves from the end of the enclosure area 201 adjacent to the battery cover plate 400 to the end of the enclosure area 201 away from the battery cover plate 400, so that the injection liquid connection port 101 is always located within the enclosure area 201 during the above initial stage; since the electrolyte splashes out from the injection liquid connection port first during the above movement process, and then stops splashing, and at this time the injection liquid connection port 101 is located within the enclosure area 201, plus the liquid blocking member 200 remains in a state of abutting against the battery cover plate 400, the liquid blocking member 200 separates the protective film 600 on the explosion-proof valve 500 from the injection liquid connection port 101, so that the liquid blocking member 200 can block the splashing electrolyte, avoiding the risk of the electrolyte splashing onto the protective film 600 and the problem of the protective film 600 leaving marks, and improving the qualification rate of the batteries produced in batches.

[0054] In some preferred embodiments, the liquid blocking member 200 is an elastic structure, so that the liquid blocking member 200 can deform when installed on the negative pressure nozzle 100, improving the convenience of installing the liquid blocking member 200 onto the negative pressure nozzle 100 through the second opening 203. Further, the liquid blocking member 200 is a rubber structure, a silicone structure or other existing elastic structures that can prevent electrolyte corrosion. Of course, in some other embodiments, the liquid blocking member 200 can also be a rigid structure.

[0055] In some preferred embodiments, the liquid baffle 200 is an integrally formed structure to avoid connection gaps in the liquid baffle 200 and improve the liquid blocking effect of the liquid baffle 200. It can be understood that the liquid baffle 200 is not limited to an integrally formed structure, and the liquid baffle 200 can also be a combined component. For example, in some other embodiments, the liquid baffle 200 includes a first liquid baffle portion and a second liquid baffle portion, which are respectively formed, and the first liquid baffle portion is connected to the second liquid baffle portion. Similarly, it can be understood that the connection structure between the first liquid baffle portion and the second liquid baffle portion can be an adhesive layer, a fastener, or other existing connection structures.

[0056] In some preferred embodiments, the negative pressure suction nozzle 100 is an elastic structure, so that the negative pressure suction nozzle 100 can be deformed when assembled with the liquid baffle 200, improving the convenience of installing the liquid baffle 200 onto the negative pressure suction nozzle 100 through the second opening 203. Further, the negative pressure suction nozzle 100 is a rubber structure, a silica gel structure, or other existing elastic structures that can prevent electrolyte corrosion. Of course, in some other embodiments, the negative pressure suction nozzle 100 can also be a rigid structure.

[0057] In some preferred embodiments, the negative pressure suction nozzle 100 and the liquid baffle 200 are in clearance fit. In this embodiment, due to the clearance fit between the negative pressure suction nozzle 100 and the liquid baffle 200, the negative pressure suction nozzle 100 will not drive the liquid baffle 200 to leave the battery cover plate 400 at the initial stage of leaving the battery cover plate 400. At this time, relying only on the gravity of the liquid baffle 200 itself, that is, relying only on the gravity, it can be ensured that the liquid injection interface 101 can move from the first end of the enclosure area 201 to the second end of the enclosure area 201, and the liquid baffle 200 can maintain the state of being in contact with the battery cover plate 400 during the above movement to ensure that the liquid baffle 200 plays a role in blocking liquid. In this way, the liquid baffle 200 can be kept in contact with the battery cover plate 400 without a driving member, simplifying the structure of the suction nozzle assembly 10 and improving the installation convenience and efficiency of the suction nozzle assembly 10. Preferably, the clearance between the negative pressure suction nozzle 100 and the liquid baffle 200 is 1 mm.

[0058] Of course, in some other embodiments, the negative pressure suction nozzle 100 and the liquid baffle 200 can also be in transition fit or interference fit. When the negative pressure suction nozzle 100 leaves the battery cover plate 400, a force is applied to the liquid baffle 200 to keep the liquid baffle 200 in contact with the battery cover plate 400 at least at the initial stage when the negative pressure suction nozzle 100 leaves the battery cover plate 400, that is, the liquid baffle 200 remains in contact with the battery cover plate 400 until the electrolyte stops splashing, to ensure that the liquid baffle 200 can block the splashing electrolyte. It can be understood that the above force can be provided by a driving structure, such as an elastic member, a motor, a cylinder, an electric cylinder, etc. Of course, the above force can also be an artificially applied force.

[0059] Embodiment 2:

[0060] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the nozzle assembly 10 of the utility model, see Figure 2 .

[0061] The negative pressure nozzle 100 of this embodiment includes a nozzle body 110 and a stopper 120, the liquid injection docking port 101 is formed at a first end of the nozzle body 110 along a first direction, and the stopper 120 is connected to the nozzle body 110. The stopper 120 and the nozzle body 110 are preferably, but not limited to, integrally formed, for example, the stopper 120 and the nozzle body 110 can also be formed separately, and the stopper 120 and the nozzle body 110 are connected to the nozzle body 110 through an existing connection structure, for example, a glue layer or a fastener.

[0062] Furthermore, the liquid blocking part 200 includes a liquid blocking body 210 and a stop part 220. The liquid blocking body 210 and the stop part 220 are preferably but not limited to being integrally formed. For example, the liquid blocking body 210 and the stop part 220 can also be formed separately. The liquid blocking body 210 is connected to the stop part 220 via an existing connection structure, such as a glue layer or a fastener.

[0063] Among them, the liquid blocking body 210 is movably arranged on the limiting part 120 along the first direction, the liquid blocking body 210 can move relative to the limiting part 120 along the first direction, the enclosure area 201 is formed in the liquid blocking body 210, and the stopper 220 is connected to the liquid blocking body 210. The stopper 220 is used to limit the movement of the liquid blocking body 210, so that the liquid blocking member 200 can be maintained in the first position under the action of its own gravity. The stopper 220 is movably arranged on the nozzle body 110 along the first direction, and the stopper 220 is arranged on the side of the limiting part 120 away from the first end of the nozzle body 110. Specifically, the stopper 220 and the limiting part 120 are arranged correspondingly up and down when negative pressure is formed. When the injection docking port 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201 , that is, when the injection docking port 101 moves from the lower end of the enclosure area 201 to the upper end of the enclosure area 201 , the stopper 220 abuts against the limiting portion 120 .

[0064] As the negative pressure nozzle 100 continues to move, the limiting portion 120 on the negative pressure nozzle 100 will drive the stop portion 220 and the liquid blocking body 210 to leave the battery cover 400, that is, drive the entire liquid blocking part 200 to leave the battery cover 400, thereby avoiding the separation of the negative pressure nozzle 100 and the liquid blocking part 200 after the negative pressure formation is completed, so that there is no need to assemble the nozzle assembly 10 again when the negative pressure formation is performed again, thereby improving the convenience and production efficiency of the reuse of the nozzle assembly 10.

[0065] It should be emphasized again that when the negative pressure suction nozzle 100 drives the liquid blocking member 200 away from the battery cover plate 400, the electrolyte has splashed out from the liquid injection connection port 101, and the electrolyte has stopped splashing. At this time, there is no risk of the splashed electrolyte contaminating the protective film 600 on the explosion-proof valve 500.

[0066] In some preferred embodiments, the liquid blocking body 210 is in clearance fit with the limiting portion 120, and the stopping portion 220 is in clearance fit with the suction nozzle body 110, so that the negative pressure suction nozzle 100 will not drive the liquid blocking member 200 away from the battery cover plate 400 at the initial stage of leaving the battery cover plate 400. At this time, relying only on the gravity of the liquid blocking member 200 itself, that is, relying only on the gravity, it can be ensured that the liquid injection connection port 101 can move from the first end of the surrounding area 201 to the second end of the surrounding area 201, and the liquid blocking member 200 can keep abutting against the battery cover plate 400 during the above movement to ensure that the liquid blocking member 200 plays a role in blocking liquid. In this way, there is no need for external force or a driving member to make the liquid blocking member 200 keep abutting against the battery cover plate 400, which simplifies the structure of the suction nozzle assembly 10 and improves the installation convenience and installation efficiency of the suction nozzle assembly 10.

[0067] In some preferred embodiments, the limiting portion 120 is annular, and the limiting portion 120 is arranged around the circumference of the suction nozzle body 110. Even if the liquid blocking member 200 or the negative pressure suction nozzle 100 rotates accidentally, the limiting portion 120 can still be aligned with and abut against the stopping portion 220, avoiding the problem of accidental separation of the liquid blocking member 200 and the negative pressure suction nozzle 100.

[0068] In some preferred embodiments, the stopping portion 220 is annular, the stopping portion 220 is arranged around the circumference of the liquid blocking body 210, and the stopping portion 220 is also arranged around the circumference of the suction nozzle body 110. Even if the liquid blocking member 200 or the negative pressure suction nozzle 100 rotates accidentally, the limiting portion 120 can still be aligned with and abut against the stopping portion 220, avoiding the problem of accidental separation of the liquid blocking member 200 and the negative pressure suction nozzle 100.

[0069] More preferably, the limiting part 120 is annular, the limiting part 120 is arranged around the circumferential direction of the nozzle body 110, the stopping part 220 is annular, the stopping part 220 is arranged around the circumferential direction of the liquid blocking body 210, and the stopping part 220 is also arranged around the circumferential direction of the nozzle body 110. In this embodiment, even if the liquid blocking member 200 or the negative pressure nozzle 100 rotates accidentally, the limiting part 120 can still be aligned with and abutted against the stopping part 220, avoiding the problem of accidental separation of the liquid blocking member 200 and the negative pressure nozzle 100. Moreover, since both the limiting part 120 and the stopping part 220 are annular, the contact area between the limiting part 120 and the stopping part 220 is increased, the impact force received by the limiting part 120 and the stopping part 220 is reduced, the risk of damage to the limiting part 120 and the stopping part 220 is inhibited, and the service life of the negative pressure nozzle 100 and the liquid blocking member 200 is prolonged.

[0070] In some preferred embodiments, the stopping part 220 protrudes from the inner side of the liquid blocking body 210, the limiting part 120 is connected to the outer side of the nozzle body 110, the liquid blocking body 210 is movably sleeved on the outer side of the limiting part 120 along the first direction, and the stopping part 220 is movably sleeved on the outer side of the nozzle body 110 along the first direction, so that the first end of the stopping part 220 abuts against the second end of the limiting part 120. Preferably, the width of the stopping part 220 is 2 mm, and the width of the limiting part 120 is 2 mm. Preferably, the height of the stopping part 220 is 1 mm - 2 mm, and the height of the limiting part 120 is 2 mm.

[0071] Preferably, the negative pressure nozzle 100 and / or the liquid blocking member 200 is an elastic structure, that is, at least one of the negative pressure nozzle 100 and the liquid blocking member 200 is an elastic structure, so that when the liquid blocking member 200 is installed on the negative pressure nozzle 100, the negative pressure nozzle 100 and / or the liquid blocking member 200 can deform, improving the convenience of installing the liquid blocking member 200 onto the negative pressure nozzle 100 through the second opening 203. Further, the above elastic structure is a rubber structure, a silicone structure or other existing elastic structures that can prevent electrolyte corrosion. Further, a guiding arc surface or a guiding inclined surface is formed at the connection between the liquid blocking body 210 and the stopping part 220. In this embodiment, during the process of installing the liquid blocking member 200 onto the negative pressure nozzle 100, the guiding arc surface and the guiding inclined surface guide the liquid blocking member 200 to be installed onto the negative pressure nozzle 100, improving the convenience of installing the liquid blocking member 200 onto the negative pressure nozzle 100.

[0072] It can be understood that in some other embodiments, both the guiding arc surface and the guiding inclined surface can be omitted.

[0073] Of course, the stopping part 220 is not limited to protruding from the inner side of the liquid blocking body 210. The stopping part 220 can also protrude from the outer side of the liquid blocking body 210, or the stopping part 220 can be arranged inside the liquid blocking body 210. For example, in some other embodiments, a stopping groove is formed at the first end of the liquid blocking body 210. The stopping part 220 is located in the stopping groove and is connected to the liquid blocking body 210. The first end of the stopping part 220 and the inner wall of the stopping groove jointly enclose a stopping cavity, and the limiting part 120 is movably arranged in the stopping cavity. In this embodiment, when the liquid injection interface 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201, the limiting part 120 moves in the stopping cavity and abuts against the stopping part 220. Preferably, the limiting part 120 is slidably connected in the stopping cavity to improve the smoothness of the sliding of the limiting part 120.

[0074] It can be understood that in some other embodiments, the stopping part 220 can also be omitted. The limiting part 120 is movably arranged in the stopping groove. When the liquid injection interface 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201, the limiting part 120 moves in the stopping groove and abuts against the inner wall of the stopping groove. As the negative pressure suction nozzle 100 continues to move, the limiting part 120 will drive the liquid blocking body 210 away from the battery cover plate 400, that is, drive the entire liquid blocking part 200 away from the battery cover plate 400, avoiding the separation of the negative pressure suction nozzle 100 and the liquid blocking part 200 after the negative pressure forming is completed, so that it is not necessary to reassemble the suction nozzle assembly 10 during the next negative pressure forming, improving the convenience of repeated use of the suction nozzle assembly 10 and the production efficiency.

[0075] It can be understood that the limiting part 120 is not limited to being connected to the outer side of the suction nozzle body 110. For example, in some other embodiments, a limiting groove is formed on the outer side of the suction nozzle body 110. The limiting part 120 is located in the limiting groove and is connected to the suction nozzle body 110. The second end of the limiting part 120 and the inner wall of the limiting groove jointly enclose a limiting cavity. The stopping part 220 protrudes from the inner side of the liquid blocking body 210, and the stopping part 220 is movably arranged in the limiting cavity. In this embodiment, when the liquid injection interface 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201, the stopping part 220 moves in the limiting cavity and abuts against the limiting part 120. Preferably, the stopping part 220 is slidably connected in the limiting cavity to improve the movement stability of the stopping part 220 in the limiting cavity.

[0076] It can be understood that in some other embodiments, the limiting portion 120 can also be omitted, and the stopping portion 220 is movably arranged in the limiting groove. When the liquid injection docking port 101 moves from the first end of the enclosure area 201 to the second end of the enclosure area 201, the stopping portion 220 moves in the limiting groove and abuts against the inner wall of the limiting groove. As the negative pressure suction nozzle 100 continues to move, the inner wall of the limiting groove will drive the stopping portion 220 and the liquid blocking body 210 away from the battery cover plate 400, that is, drive the entire liquid blocking member 200 away from the battery cover plate 400, avoiding the separation of the negative pressure suction nozzle 100 from the liquid blocking member 200 after the negative pressure formation is completed, so that it is not necessary to reassemble the suction nozzle assembly 10 during the next negative pressure formation, improving the convenience of repeated use of the suction nozzle assembly 10 and the production efficiency.

[0077] Embodiment 3:

[0078] On the basis of any of the above embodiments, this embodiment further optimizes the structure of the suction nozzle assembly of the present utility model. Please refer to Figures 4 to 5 .

[0079] The suction nozzle assembly 10 of this embodiment further includes an elastic member 300.

[0080] The elastic member 300 is respectively connected to the negative pressure suction nozzle 100 and the liquid blocking member 200. When the liquid injection docking port 101 moves to the first end of the enclosure area 201, the elastic member 300 is in a compressed state. When the negative pressure suction nozzle 100 leaves the battery cover plate 400, the elastic member 300 elastically resets and elastically abuts against the liquid blocking member 200, causing the liquid injection docking port 101 to move from the first end of the enclosure area 201 to the second end of the enclosure area 201. That is to say, it makes the negative pressure suction nozzle 100 and the liquid blocking member 200 move relative to each other, and the liquid injection docking port 101 moves from the lower end of the enclosure area 201 to the upper end of the enclosure area 201. In this embodiment, when the negative pressure suction nozzle 100 leaves the battery cover plate 400, the elastic member 300 gradually elastically recovers and elastically abuts against the liquid blocking member 200, causing the liquid blocking member 200 to remain in contact with the battery cover plate 400, and at the same time causing the liquid injection docking port 101 to move from the first end of the enclosure area 201 to the second end of the enclosure area 201; as the negative pressure suction nozzle 100 continues to move in the direction away from the battery cover plate 400, the elastic member 300 will completely elastically recover. At this time, the elastic thrust of the elastic member 300 no longer acts on the liquid blocking member 200. As the negative pressure suction nozzle 100 continues to move, the elastic member 300 will pull the liquid blocking member 200 away from the battery cover plate 400.

[0081] Furthermore, since the elastic member 300 pushes the liquid blocking member 200 to remain in contact with the battery cover 400, the risk of the liquid blocking member 200 being separated from the battery cover 400 in the initial stage of the negative pressure suction nozzle 100 leaving is reduced, further ensuring that the liquid blocking member 200 plays a role in blocking liquid. In addition, since the elastic member 300 also pulls the liquid blocking member 200 to separate from the battery cover 400, the liquid blocking member 200 will not be separated from the negative pressure suction nozzle 100 after the negative pressure is formed, and the suction nozzle assembly 10 can be used again without reassembly, thereby improving the convenience of use and production efficiency of the suction nozzle assembly 10. It can be understood that the elastic member 300 can be a spring, a rubber member, a silicone member or other existing elastic structures.

[0082] It should be particularly emphasized that when the elastic member 300 drives the liquid blocking member 200 to leave the battery cover 400, the electrolyte at the injection interface 101 has already splashed out and the electrolyte has stopped splashing, so the liquid blocking member 200 leaving the battery cover 400 does not affect the liquid blocking effect.

[0083] In some preferred embodiments, the elastic member 300 is sleeved on the negative pressure suction nozzle 100, and the two ends of the elastic member 300 are respectively connected to the negative pressure suction nozzle 100 and the liquid blocking member 200. In this embodiment, since the elastic member 300 is sleeved on the negative pressure suction nozzle 100, the position stability of the elastic member 300 is improved, and the elastic member 300 is prevented from bending due to deformation. At the same time, the elastic force on the liquid blocking member 200 is more uniform, and the problem of the liquid blocking member 200 sliding on the battery cover 400 is avoided, and the liquid blocking effect of the liquid blocking member 200 is ensured.

[0084] In some preferred embodiments, the negative pressure suction nozzle 100 includes a suction nozzle body 110, a limiting portion 120 and a mounting portion 130, the liquid injection docking port 101 is formed on the suction nozzle body 110, the limiting portion 120 and the mounting portion 130 are spaced and connected to the suction nozzle body 110, and a mounting groove 102 is formed between the limiting portion 120 and the mounting portion 130, the elastic member 300 is sleeved on the suction nozzle body 110, and the elastic member 300 is located in the mounting groove 102, the second end of the elastic member 300 is connected to the mounting portion 130, and the first end of the elastic member 300 is connected to the liquid blocking member 200. In this embodiment, since the elastic member 300 is arranged in the mounting groove 102, the position stability of the elastic member 300 is improved, and the problem of the elastic member 300 accidentally detaching from the negative pressure suction nozzle 100 is avoided. Further, the mounting portion 130 is used to provide a fulcrum to facilitate the installation or removal of the negative pressure suction nozzle 100 and the pipeline of the negative pressure source.

[0085] Embodiment 4:

[0086] This embodiment provides a negative pressure formation system based on the above embodiment. Figure 5 .

[0087] A negative pressure formation system includes a battery 20 and the suction nozzle assembly 10 described in any of the above embodiments.

[0088] Among them, the battery 20 can be a steel shell battery, an aluminum shell battery or other existing hard shell batteries. The battery 20 includes a battery cover plate 400. The battery cover plate 400 is formed with a liquid injection port 401. The first end of the negative pressure suction nozzle 100 in the first direction is used to abut against the battery cover plate 400. The liquid injection connection port 101 is used to cover the liquid injection port 401 and communicate with the liquid injection port 401. The first end of the liquid blocking member 200 in the first direction is used to abut against the battery cover plate 400. Further, the battery 20 further includes an explosion-proof valve 500 and a protective film 600. The explosion-proof valve 500 is provided on the battery cover plate 400. The explosion-proof valve 500 is arranged at an interval from the liquid injection port 401. The protective film 600 is provided on the explosion-proof valve 500.

[0089] In this embodiment, during the negative pressure formation of the battery, the battery cover plate 400 is arranged upward. The first end of the negative pressure suction nozzle 100 abuts against the battery cover plate 400. The liquid injection connection port 101 corresponds to and communicates with the liquid injection port 401 on the battery cover plate 400. The first end of the liquid blocking member 200 abuts against the battery cover plate 400. The negative pressure suction nozzle 100 evacuates the inside of the battery through the liquid injection port 401 to discharge the gas generated during the battery formation. When the negative pressure formation is completed, the negative pressure of the negative pressure suction nozzle 100 is removed, and the negative pressure suction nozzle 100 leaves the battery cover plate 400. During the process of the negative pressure suction nozzle 100 leaving the battery cover plate 400, the negative pressure suction nozzle 100 moves relative to the liquid blocking member 200, and the liquid injection connection port 101 moves from the end of the enclosure area 201 adjacent to the battery cover plate 400 to the end of the enclosure area 201 away from the battery cover plate 400. Specifically, the liquid injection connection port 101 moves from the lower end of the enclosure area 201 to the upper end of the enclosure area 201. When the liquid injection connection port 101 moves in the enclosure area 201, electrolyte splashes out at the liquid injection connection port 101. At the same time, the liquid blocking member 200 remains in contact with the battery cover plate 400, isolating the protective film 600 of the explosion-proof valve 500 from the liquid injection connection port 101, and the liquid blocking member 200 blocks the splashing electrolyte to prevent the electrolyte from splashing onto the protective film 600 of the explosion-proof valve 500.

[0090] For the negative pressure formation system of the present utility model, in the initial stage when the negative pressure suction nozzle 100 leaves the battery cover plate 400, the liquid blocking member 200 remains in a state of abutting against the battery cover plate 400. At the same time, the liquid injection docking port 101 moves from the first end of the enclosing area 201 to the second end of the enclosing area 201. Specifically, the liquid injection docking port 101 moves from the end of the enclosing area 201 adjacent to the battery cover plate 400 to the end of the enclosing area 201 away from the battery cover plate 400, so that the liquid injection docking port 101 is always located within the enclosing area 201 during the above initial stage. Since the electrolyte splashes out from the liquid injection docking port first during the above movement process, and then stops splashing, and at this time the liquid injection docking port 101 is located within the enclosing area 201, plus the liquid blocking member 200 remains in a state of abutting against the battery cover plate 400, the liquid blocking member 200 separates the protective film 600 on the explosion-proof valve 500 from the liquid injection docking port 101, so that the liquid blocking member 200 can block the splashing electrolyte, avoiding the risk of the electrolyte splashing onto the protective film 600 and the problem of the protective film 600 leaving marks, and improving the qualified rate of the batteries produced in batches.

[0091] In the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0092] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0093] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0094] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being above, over, and on top of the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0095] Although the description of the present utility model is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications, and variations based on the above content. Therefore, all such substitutions, improvements, and variations are included within the spirit and scope of the appended claims.

Claims

1. A nozzle assembly, characterized in that: include: A negative pressure suction nozzle (100), wherein a first end of the negative pressure suction nozzle (100) along a first direction is formed with a liquid injection docking port (101); as well as a liquid blocking member (200), the liquid blocking member (200) being movably arranged on the negative pressure suction nozzle (100) along the first direction, an enclosure area (201) being formed inside the liquid blocking member (200), a first opening (202) being formed at a first end of the enclosure area (201) along the first direction, a second opening (203) being formed at a second end of the enclosure area (201) along the first direction, and the liquid injection docking port (101) being able to enter the enclosure area (201) through the second opening (203); The liquid blocking member (200) is used to move relative to the negative pressure suction nozzle (100) along the first direction under the action of an external force, so that the liquid injection docking port (101) can move along the first direction within the enclosure (201), and can move to the first end of the enclosure (201) or leave the first end of the enclosure (201) through the first opening (202).

2. The nozzle assembly according to claim 1, characterized in that: The negative pressure suction nozzle (100) comprises a suction nozzle body (110) and a limiting portion (120), the liquid injection docking port (101) is formed at a first end of the suction nozzle body (110) along the first direction, and the limiting portion (120) is connected to the suction nozzle body (110); The liquid blocking member (200) comprises a liquid blocking body (210) and a stop portion (220); the liquid blocking body (210) is movably arranged on the limiting portion (120) along the first direction; the enclosure area (201) is formed in the liquid blocking body (210); the stop portion (220) is connected to the liquid blocking body (210); the stop portion (220) is movably arranged on the nozzle body (110) along the first direction; and the stop portion (220) is arranged on a side of the limiting portion (120) that is away from the first end of the nozzle body (110).

3. The nozzle assembly according to claim 2, characterized in that: The liquid blocking body (210) and the limiting portion (120) are clearance-matched, and the stopping portion (220) and the nozzle body (110) are clearance-matched.

4. The nozzle assembly according to claim 2, characterized in that: The limiting portion (120) is annular; and / or, The stopper (220) is annular.

5. The nozzle assembly according to claim 2, characterized in that: The stop portion (220) is protrudingly arranged on the inner side of the liquid blocking body (210), the limiting portion (120) is connected to the outer side of the nozzle body (110), the liquid blocking body (210) is movably sleeved on the outer side of the limiting portion (120) along the first direction, and the stop portion (220) is movably sleeved on the outer side of the nozzle body (110) along the first direction.

6. The nozzle assembly according to claim 2, characterized in that: The negative pressure suction nozzle (100) and / or the liquid blocking member (200) are elastic structures.

7. The nozzle assembly according to claim 2, characterized in that: A guiding arc surface or a guiding inclined surface is formed at the connection between the liquid blocking body (210) and the stopper (220).

8. The nozzle assembly according to any one of claims 1 to 7, characterized in that: The suction nozzle assembly further comprises an elastic member (300), wherein the elastic member (300) is respectively connected to the negative pressure suction nozzle (100) and the liquid blocking member (200), and when the liquid injection docking port (101) moves to the first end of the enclosure area (201), the elastic member (300) is in a compressed state.

9. The nozzle assembly according to any one of claims 1 to 7, characterized in that: The movable stroke of the injection docking port (101) along the first direction within the enclosure area (201) is set to any value between 3 mm and 10 mm.

10. A negative pressure formation system, characterized in that: The invention comprises a battery (20) and a nozzle assembly (10) according to any one of claims 1 to 9, wherein the battery (20) comprises a battery cover (400), the battery cover (400) is formed with a liquid injection port (401), the first end of the negative pressure nozzle (100) along the first direction is used to abut against the battery cover (400), the liquid injection docking port (101) is used to cover the liquid injection port (401), and the first end of the liquid blocking member (200) along the first direction is used to abut against the battery cover (400).

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