Liquid injection station liquid beating structure and liquid injection mechanism

Abstract

The utility model discloses a liquid injection station liquid beating structure and a liquid injection mechanism, the liquid injection station liquid beating mechanism comprises an on-off valve, a liquid injection needle, a liquid injection cup and a liquid injection nozzle, the liquid injection needle is fixedly connected with the on-off valve, the on-off valve is externally connected with a liquid supply device, the tail end of the liquid injection needle extends into the liquid injection cup, and the liquid injection nozzle is fixedly connected with the liquid injection cup. The liquid injection nozzle is connected to the side, away from the liquid injection needle, of the liquid injection cup, and a separation structure used for enhancing the surface adsorption force is arranged in the liquid injection nozzle. According to the liquid injection nozzle, the phenomenon of corrosion caused by dripping of residual electrolyte on the liquid injection nozzle is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery liquid injection, in particular to a liquid injection structure and a liquid injection mechanism of a liquid injection station. Background Art

[0002] Traditional liquid injection equipment adopts a direct liquid supply and injection method, and the battery cell is injected with liquid through the injection nozzle. After the injection is completed, there are still electrolyte droplets remaining on the injection nozzle. Since the viscosity of the electrolyte is not high, the electrolyte remaining at the injection nozzle will continue to accumulate. When the gravity of the accumulated electrolyte is greater than the adsorption force of the side wall of the injection nozzle on the electrolyte, the electrolyte will drip. When the electrolyte drips to other locations except the electrolyte injection hole, it will cause corrosion to the battery surface or equipment parts.

[0003] In view of this, the purpose of this utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a liquid injection structure of a liquid injection station, which solves the problem that residual electrolyte dripping on the liquid injection nozzle easily causes corrosion.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A liquid injection station liquid injection structure includes an on-off valve, an injection needle, a injection cup and an injection nozzle. The injection needle is fixedly connected to the on-off valve, the on-off valve is externally connected to a liquid supply device, the tail end of the injection needle extends into the injection cup, the injection nozzle is connected to the side of the injection cup away from the injection needle, and a partition structure is provided in the injection nozzle to enhance surface adsorption force.

[0007] In the above structure, the partition structure includes a plurality of partition blocks, and the plurality of partition blocks are evenly arranged in an array on the inner wall of the liquid injection nozzle away from the liquid injection cup, and there are gaps between adjacent partition blocks.

[0008] In the above structure, there are four dividing blocks, which are fixedly connected to the inner wall of the liquid injection nozzle. There is a chamfered structure between the dividing blocks and the inner wall of the liquid injection nozzle, and the dividing block has a chamfered structure at one end away from the inner wall of the liquid injection nozzle.

[0009] In the above structure, the tail end of the injection needle is configured to have a bevel with a certain angle.

[0010] In the above structure, the inclination angle of the bevel is less than 90°.

[0011] In the above structure, a sealing ring is provided between the injection needle and the injection cup.

[0012] In the above structure, the side of the injection cup away from the injection needle is fixedly connected to the diaphragm valve, and the injection nozzle is fixedly arranged at the output end of the diaphragm valve.

[0013] In the above structure, it also includes a mounting plate, on which a floating plate is slidably connected, the liquid injection cup is fixedly connected to the floating plate, and the mounting plate is connected to an elastic member, which drives the floating plate to slide up and down on the mounting plate.

[0014] In the above structure, the elastic member is a floating spring, a floating connection block is fixedly connected to the mounting plate, one end of the floating spring is fixedly connected to the floating connection block, and the other end is fixedly connected to the floating plate.

[0015] Based on the above-mentioned liquid injection station liquid injection structure, the utility model also provides:

[0016] A liquid injection mechanism includes the liquid injection station liquid injection structure as described above.

[0017] The beneficial effect of the utility model is that a partition structure is provided in the liquid injection nozzle to enhance the surface adsorption force. After the liquid injection of the battery core is completed, the electrolyte remaining in the liquid injection nozzle will not drip and cause corrosion under the action of the partition structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the utility model;

[0021] Figure 3 It is a side schematic diagram of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the liquid injection nozzle of the utility model.

[0023] Figure numerals: 1. Mounting plate; 11. Slide rail; 12. Floating plate; 121. Slider; 13. Floating spring; 14. Floating connecting block; 2. On-off valve; 21. Flange joint; 3. Filling cup; 31. Sealing ring; 4. Filling needle; 5. Filling nozzle; 6. Diaphragm valve; 7. Partition structure; 71. Partition block. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-4 The utility model is further described.

[0025] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0026] Reference Figures 1 to 4 The present invention provides a liquid injection station liquid injection structure, which is arranged in a liquid injection mechanism and includes an on-off valve 2, a liquid injection needle 4, a liquid injection cup 3 and a liquid injection nozzle 5. The on-off valve 2 is used to connect to an external liquid supply device. When the on-off valve 2 is open, the external liquid supply device is connected to the liquid injection station liquid injection structure, and the liquid supply device supplies liquid to the liquid injection station liquid injection structure; when the on-off valve 2 is closed, the liquid injection structure and the external liquid supply device are blocked. The liquid injection needle 4 is connected to the on-off valve 2, and the tail end of the liquid injection needle 4 extends into the liquid injection cup 3. The electrolyte provided by the liquid supply device is injected into the liquid injection cup 3 from the liquid injection needle 4; the liquid injection nozzle 5 is arranged on the side of the liquid injection cup 3 away from the liquid injection needle 4, and the liquid injection nozzle 5 is connected to the battery cell to perform the battery cell liquid injection operation. A partition structure 7 is provided in the liquid injection nozzle 5. The partition structure 7 is used to enhance the surface adsorption force in the liquid injection nozzle 5. When the liquid injection of the battery cell is completed, a small amount of liquid remains in the pipeline and fails to drip before the battery cell is removed. The partition structure 7 is provided so that after the liquid injection is completed, the electrolyte is not easy to drip, thereby reducing the probability of residual electrolyte on the liquid injection nozzle 5 dripping.

[0027] In this embodiment, a flange joint 21 is fixedly connected to the on-off valve 2. The flange joint 21 is used to connect to a liquid supply device, which may be a liquid injection pump or the like.

[0028] Reference Figure 2 and Figure 4 Furthermore, the partition structure 7 includes a plurality of partition blocks 71, and the plurality of partition blocks 71 are fixedly connected to the liquid injection nozzle 5. Specifically, the plurality of partition blocks 71 are evenly arranged in an array on the inner wall of the liquid injection nozzle 5 away from the liquid injection cup 3, and there is a gap between adjacent partition blocks 71, that is, there is space between the partition blocks 71 for the electrolyte to flow out.

[0029] In this embodiment, four separators 71 are provided. The four separators 71 are fixedly connected to the inner wall of the liquid injection nozzle 5. A chamfered structure is formed between the separators 71 and the inner wall of the liquid injection nozzle 5. The separators 71 also have a chamfered structure on the side away from the inner wall of the liquid injection nozzle 5. The four separators 71 divide the outlet of the liquid injection nozzle 5 into four channels, that is, the cross-section of the liquid injection nozzle is approximately in the shape of a plum blossom. The electrolyte can flow out of the liquid injection nozzle 5 from the four channels respectively. Because the liquid injection nozzle 5 is divided, the diameter of each channel is smaller than the diameter of the original liquid injection nozzle 5. In the relatively small diameter, tension is generated on the liquid surface. The residual electrolyte after the liquid injection is completed is not easy to drip due to the tension. The separators also reduce the size of the electrolyte droplets and relieve the gravity of the electrolyte. Therefore, after the liquid injection is completed, the electrolyte is not easy to drip, thereby reducing the probability of residual electrolyte dripping on the liquid injection nozzle 5 and effectively reducing the corrosion caused by residual electrolyte dripping. Providing a chamfered structure is helpful to ensure that the electrolyte can smoothly pass through the injection nozzle 5 during injection.

[0030] In addition, since the electrolyte is corrosive to a certain extent, the separator 71 can be made of a material that is resistant to electrolyte corrosion, such as EPDM rubber, fluororubber or other rubber materials.

[0031] Reference Figure 2 Furthermore, the tail end of the injection needle 4 is set to have a bevel with a certain angle, and the inclination angle of the bevel is less than 90°. By setting the tail end of the injection needle 4 to have a bevel with a certain angle, the liquid can automatically flow down from the tail end of the injection needle 4 into the injection cup 3. The design of the injection needle 4 with a bevel can discharge all the liquid in the injection needle 4 under the action of the liquid's own gravity without leaving any residue in the injection needle 4, so as to ensure the injection accuracy. The structure with a bevel can also ensure that the liquid will not splash during injection.

[0032] A diaphragm valve 6 is fixedly connected to the side of the filling cup 3 away from the filling needle 4, and the filling nozzle 5 is fixedly arranged at the output end of the diaphragm valve 6. When the diaphragm valve 6 is opened, the filling nozzle 5 and the filling cup 3 are in a connected state, and the battery cell filling work can be carried out at this time; when the diaphragm valve 6 is closed, the filling cup 3 and the filling nozzle 5 are in a separated state.

[0033] An embedded pipe joint is provided on the liquid filling cup 3, one end of the embedded pipe joint is connected to the inside of the liquid filling cup 3, and the other end is connected to a vacuum generating device, which is used to evacuate the liquid filling cup 3 or generate positive pressure.

[0034] Furthermore, a sealing ring 31 is provided between the injection cup 3 and the injection needle 4. The sealing ring 31 is provided at the connection between the injection cup 3 and the injection needle 4 to ensure that good sealing is maintained between the injection cup 3 and the injection needle 4.

[0035] During use, before liquid injection, first keep the on-off valve 2 and the diaphragm valve 6 in the closed state, then open the vacuum generator and evacuate the liquid injection cup 3. After all the gas in the liquid injection cup 3 is exhausted, switch the vacuum generator to normal pressure and connect the flange joint 21 to the liquid injection pump. During liquid injection, open the on-off valve 2. At this time, the electrolyte will flow into the liquid injection cup 3 along the liquid injection needle 4. Since the liquid injection needle 4 is provided with an oblique opening, the electrolyte will flow into the liquid injection cup 3 along the oblique opening, effectively reducing the phenomenon of liquid hanging on the liquid injection needle 4 and causing electrolyte residue, thereby ensuring the injection accuracy of the electrolyte in the liquid injection cup 3. After the liquid injection cup 3 is filled, open the diaphragm valve 6 and start the liquid injection of the battery cell. When the liquid injection of the battery cell is completed, the vacuum generator blows positive pressure into the liquid injection cup 3 to blow the battery remaining in the liquid injection cup 3 into the battery cell as much as possible. After the liquid injection is completed, the battery cell is removed. Although blowing positive pressure into the filling cup 3 can blow most of the electrolyte hanging on the wall of the filling cup 3 into the battery cell, due to the short time of blowing positive pressure, all the residual electrolyte cannot be blown into the battery cell. At this time, the partition structure 7 in the filling nozzle 5 causes tension to be generated on a small number of residual electrolyte droplets, and the electrolyte droplets adhere to the inner wall of the filling nozzle 5 and the partition structure 7 and are not easy to drip, thereby reducing the corrosion of the battery surface or equipment parts caused by the dripping of residual electrolyte.

[0036] Reference Figure 2 and Figure 3 Furthermore, in this embodiment, the liquid filling station structure further includes a mounting plate 1, with the liquid filling cup 3 floatingly mounted on the mounting plate 1. Specifically, a floating plate 12 is slidably connected to the mounting plate 1, and the liquid filling cup 3 is fixedly connected to the floating plate 12. A slide rail 11 extending in a vertical direction is fixedly connected to the mounting plate 1. A slider 121 is fixedly connected to the floating plate 12, and the slider 121 is slidably connected to the slide rail 11. An elastic member, a floating spring 13, is provided on the mounting plate 1 to drive the floating plate 12 to slide up and down. A floating connection block 14 is fixedly connected to the mounting plate 1. One end of the floating spring 13 is fixedly connected to the floating connection block 14, and the other end is fixedly connected to the floating plate 12. When filling a battery cell, the liquid filling station structure can be adjusted to float according to the battery cell being filled. If there is a slight height deviation of the battery cell, the liquid filling station structure can be adaptively adjusted so that the liquid filling nozzle 5 can fit the battery cell, effectively ensuring the reliability of the liquid filling.

[0037] Based on the above-mentioned liquid injection station liquid injection structure, the utility model also provides:

[0038] A liquid injection mechanism includes a liquid injection station structure having the structure described above. The above is a detailed description of preferred embodiments of the present invention, but the present invention is not limited to the embodiments described. Persons skilled in the art may make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are all within the scope of the claims of this application.

Claims

1. A liquid injection station liquid injection structure, characterized by: It includes an on-off valve, an injection needle, an injection cup and an injection nozzle. The injection needle is fixedly connected to the on-off valve. The on-off valve is used for an external liquid supply device. The tail end of the injection needle extends into the injection cup. The injection nozzle is connected to the side of the injection cup away from the injection needle, and a partition structure is provided in the injection nozzle to enhance the surface adsorption force.

2. The liquid injection station liquid injection structure according to claim 1, characterized in that: The partition structure includes a plurality of partition blocks, and the plurality of partition blocks are evenly arranged in an array on the inner wall of the liquid injection nozzle away from the liquid injection cup.

3. The liquid injection station liquid injection structure according to claim 2, characterized in that: There are four dividing blocks, which are fixedly connected to the inner wall of the liquid injection nozzle. There is a chamfered structure between the dividing blocks and the inner wall of the liquid injection nozzle, and the dividing block has a chamfered structure at one end away from the inner wall of the liquid injection nozzle.

4. The liquid injection station liquid injection structure according to claim 1, characterized in that: The tail end of the injection needle is configured to have a bevel with a certain angle.

5. The liquid injection station liquid injection structure according to claim 4, characterized in that: The inclination angle of the bevel is less than 90°.

6. The liquid injection station liquid injection structure according to claim 1, characterized in that: A sealing ring is provided between the injection needle and the injection cup.

7. The liquid injection station liquid injection structure according to claim 1, characterized in that: The side of the injection cup away from the injection needle is fixedly connected to a diaphragm valve, and the injection nozzle is fixedly arranged at the output end of the diaphragm valve.

8. The liquid injection station liquid injection structure according to claim 1, characterized in that: It also includes a mounting plate, which is slidably connected to a floating plate, the liquid injection cup is fixedly connected to the floating plate, and the mounting plate is connected to an elastic member, which drives the floating plate to slide up and down on the mounting plate.

9. The liquid injection station liquid injection structure according to claim 8, characterized in that: The elastic member is a floating spring. A floating connection block is fixedly connected to the mounting plate. One end of the floating spring is fixedly connected to the floating connection block, and the other end is fixedly connected to the floating plate.

10. A liquid injection mechanism, characterized in that: The invention comprises the liquid injection station liquid injection structure according to any one of claims 1 to 9.

Images