CN221176605U

CN221176605U - Cell priming device

Info

Publication number: CN221176605U
Application number: CN202322899608.XU
Authority: CN
Inventors: 王洪峡; 刘长来; 夏诗忠; 陈念; 李琦旸; 马朋展; 曹新
Original assignee: Camel Group Wuhan Optics Valley R&d Center Co ltd
Current assignee: Camel Group Wuhan Optics Valley R&d Center Co ltd
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2024-06-18
Anticipated expiration: 2033-10-26

Abstract

The utility model provides a cell electrolyte injection device. The cell electrolyte injection device comprises a first electrolyte injection rod; the first liquid injection rod comprises a first pump body, a first pump head, a first pump core and a waterproof breathable film, wherein the first pump body is provided with a hollow cavity, the first pump head is connected to one end of the first pump body, the first pump core is located in the first pump body, the waterproof breathable film is connected to the inner side of the side wall of the first pump body and located between the first pump core and the first pump head, and the waterproof breathable film at least partially covers the cross section of the first pump body. According to the embodiment of the utility model, the waterproof breathable film is arranged, so that when the first liquid injection rod is adopted for vacuumizing, only gas in the battery cell shell is allowed to pass through, and the circulation of electrolyte is blocked. Therefore, the actual liquid injection times can be effectively reduced, the liquid injection time is saved, and the liquid injection efficiency is improved; and the phenomenon of cross contamination of the electrolyte caused by the vacuumizing process can be effectively avoided when two or more electrolyte types are needed for filling.

Description

Cell priming device

Technical Field

The application relates to the technical field of lithium ion batteries, in particular to a battery cell electrolyte injection device.

Background

As energy problems become more serious, the range of applications of batteries is expanding gradually. In the production of a battery, an operation of injecting an electrolyte into the interior of the battery is generally involved, and a device for achieving the operation is called a liquid injection device.

As described in patent CN106654142a, the conventional liquid filling device must first vacuumize the battery due to structural limitation, then fill the electrolyte into the liquid filling cup, and then fill the electrolyte in the liquid filling cup into the battery. This structure results in a lower liquid injection efficiency of the battery. According to the liquid injection mode, in the process of circulating vacuumizing, the gas in the battery cell shell is easily discharged and the electrolyte is sucked out, so that part of electrolyte is not injected in a certain liquid injection time, the next circulating reinjection is needed, the liquid injection times are increased, and the time is consumed. Moreover, when multiple electrolyte at different stages is needed for filling, the electrolyte is very easy to be pumped out, and if the electrolyte is different when the electrolyte is filled once or twice, cross contamination among different electrolytes can be caused, so that the expected filling effect can not be achieved.

In summary, the cell liquid injection process in the prior art has the technical problems of more liquid injection times, longer liquid injection time, lower liquid injection efficiency and easy cross contamination among different electrolytes.

Disclosure of utility model

Aiming at the defects of the prior art, the application provides a cell electrolyte injection device which is used for solving the technical problems of more liquid injection times, longer liquid injection time, lower liquid injection efficiency and easy cross contamination among different electrolytes in the prior art.

The embodiment of the application provides a battery cell electrolyte injection device, which comprises a first electrolyte injection rod;

Wherein the first liquid injection rod comprises a first pump body, a first pump head, a first pump core and a waterproof breathable film,

The first pump body has hollow cavity, first pump head connect in the one end of first pump body, first pump core is located in the first pump body and cover the cross section of first pump body, first pump core is followed the axis direction rectilinear movement of first pump body or with the axis of first pump body is the axle rotary motion, waterproof ventilated membrane connect in the lateral wall inboard of first pump body and be located first pump core with between the first pump head, waterproof ventilated membrane at least part covers the cross section of first pump body.

In some embodiments of the present application, the first liquid injection rod further includes a plurality of blocking joints, the blocking joints are connected to the inner side of the side wall of the first pump body, the waterproof and breathable film is connected to at least one blocking joint, and the distances between any two adjacent blocking joints are equal.

In some embodiments of the present application, the waterproof and breathable membrane is rotatably connected to one of the choke points, and the travel limit of the waterproof and breathable membrane includes a side of the waterproof and breathable membrane facing the first pump head with one of the choke points as an axis, and the waterproof and breathable membrane abuts against the other choke points.

In some embodiments of the present application, the first liquid injection rod further comprises a rotating shaft, an edge of the waterproof and breathable film is connected with the rotating shaft, the rotating shaft is connected with one of the resistance joints, and the waterproof and breathable film rotates around the rotating shaft.

In some embodiments of the application, the waterproof and breathable membrane comprises an open state parallel to the first pump body side wall and a blocked state perpendicular to the first pump body side wall.

In some embodiments of the application, the choke plug is rectangular.

In some embodiments of the present application, the liquid injection device further comprises a rotary cylinder and a second liquid injection rod, wherein an output shaft of the rotary cylinder is respectively connected with the first liquid injection rod and the second liquid injection rod, and the output shaft of the rotary cylinder, the first liquid injection rod and the second liquid injection rod are collinear.

In some embodiments of the present application, the waterproof and breathable film is fixedly connected to the inner side of the side wall of the first pump body, and the outer contour of the waterproof and breathable film is fitted to the inner contour of the first pump body.

In some embodiments of the application, the fixing means between the waterproof and breathable membrane and the first pump body comprises hot press fixing, adhesive fixing, snap fixing or clamp fixing.

In some embodiments of the present application, the second liquid injection rod includes a second pump body, a second pump head, and a second pump core, where the second pump body has a hollow cavity, the second pump head is connected to one end of the second pump body, the second pump core is located in the second pump body and covers a cross section of the second pump body, and the second pump core moves linearly along an axis direction of the second pump body or rotates with the axis of the second pump body as a shaft.

The technical scheme provided by the embodiment of the application has the beneficial technical effects that: according to the embodiment of the application, the waterproof and breathable film is arranged on the inner side of the side wall of the first pump body, so that when the first liquid injection rod is used for vacuumizing, the waterproof and breathable film covers the cross section of the first pump body, and only gas in the battery cell shell is allowed to pass through, so that the circulation of electrolyte is blocked. Therefore, the optimized liquid injection mode can effectively reduce the actual liquid injection times, save the liquid injection time and improve the liquid injection efficiency; and the phenomenon of cross contamination of the electrolyte caused by the vacuumizing process can be effectively avoided when two or more electrolyte types are needed for filling.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a cell electrolyte injection device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an embodiment of a cell electrolyte injection device;

FIG. 3 is a schematic diagram of another embodiment of a cell electrolyte injection device;

Fig. 4 is a schematic diagram illustrating the operation of another cell electrolyte injection device according to an embodiment of the present application.

Reference numerals:

1-a first liquid injection rod and 2-a second liquid injection rod;

11-a first pump body, 12-a first pump head, 13-a waterproof breathable film and 14-a blocking joint;

21-second pump body, 22 second pump head.

Detailed Description

Embodiments of the present application are described below with reference to the drawings in the present application. It should be understood that the embodiments described below with reference to the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and the technical solutions of the embodiments of the present application are not limited.

As used herein, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by one of skill in the art. It should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, all of which may be included in the present application. It will be understood that when we refer to one element being "connected" to another element, the one element can be directly connected to the other element or the one element and the other element can be connected through intervening elements. Further, "connected" as used herein may include wireless connections.

In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail with reference to the accompanying drawings. It should be noted that the following embodiments may be referred to, or combined with each other, and the description will not be repeated for the same terms, similar features, similar implementation steps, and the like in different embodiments.

The embodiment of the application provides a battery cell priming device, as shown in fig. 1 and 2, fig. 1 is a schematic structural diagram of the battery cell priming device in the embodiment of the application; fig. 2 is a schematic diagram of an embodiment of the present application, where arrows show the flow direction of gas.

The cell electrolyte injection device comprises a first electrolyte injection rod 1; wherein, first notes liquid pole 1 includes first pump body 11, first pump head 12, first pump core and waterproof ventilated membrane 13.

The first pump body 11 is provided with a hollow cavity, the first pump head 12 is connected to one end of the first pump body 11, the first pump core is located in the first pump body 11 and covers the cross section of the first pump body 11, the first pump core moves linearly along the axis direction of the first pump body 11 or rotates by taking the axis of the first pump body 11 as a shaft, the waterproof breathable membrane 13 is connected to the inner side of the side wall of the first pump body 11 and is located between the first pump core and the first pump head 12, and the waterproof breathable membrane 13 at least partially covers the cross section of the first pump body 11.

According to the embodiment of the application, the waterproof and breathable film 13 is arranged on the inner side of the side wall of the first pump body 11, when the first liquid injection rod 1 is adopted for vacuumizing, the waterproof and breathable film 13 covers the cross section of the first pump body 11 and only allows gas in the battery cell shell to pass through, so that the circulation of electrolyte is blocked. Therefore, the optimized liquid injection mode can effectively reduce the actual liquid injection times, save the liquid injection time and improve the liquid injection efficiency; and the phenomenon of cross contamination of the electrolyte caused by the vacuumizing process can be effectively avoided when two or more electrolyte types are needed for filling.

In some embodiments of the present application, the first injection rod 1 further includes a plurality of blocking tabs 14, the blocking tabs 14 are connected to the inner side of the sidewall of the first pump body 11, the waterproof and breathable film 13 is connected to at least one blocking tab 14, and the distance between any two adjacent blocking tabs 14 is equal.

In this embodiment, the blocking heads 14 are disposed in the middle of the hollow first pump body 11, the blocking heads 14 are located on the inner side of the side wall of the first pump body 11, the number of blocking heads 14 is four, and the blocking heads 14 are rectangular. The four blocking heads 14 are respectively located in four directions of the cross section of the first pump body 11, and an included angle formed between two adjacent directions is 90 degrees.

In some embodiments of the present application, the waterproof and breathable membrane 13 is rotatably connected to one of the choke points 14, and the travel limit of the waterproof and breathable membrane 13 includes a side of the waterproof and breathable membrane 13 facing the first pump head 12 with one of the choke points 14 as an axis, and the waterproof and breathable membrane 13 abuts against the other choke points 14.

The waterproof and breathable film 13 is connected to the lower shaft of one of the choke joints 14, the cross section of the waterproof and breathable film 13 is circular, the edge of the waterproof and breathable film 13 close to the perimeter is connected with the rotating shaft, the rotating shaft is connected with one of the choke joints 14, and the waterproof and breathable film 13 can rotate around the rotating shaft. The other three blocking tabs 14 only act as barriers and are not fixed to the waterproof and breathable membrane 13, the waterproof and breathable membrane 13 acting to allow the passage of gases and to prevent the passage of electrolyte.

At the beginning of one-time liquid injection, the waterproof and breathable film 13 can be downwards flushed by utilizing the self gravity of the electrolyte, the waterproof and breathable film 13 is opened towards the first pump head 12, and the electrolyte can smoothly reach the cell shell through the first pump head 12 in the process. In the pressurizing and liquid injection process, as shown in the left side of fig. 2, the waterproof and breathable film 13 is closer to the side wall of the first liquid injection rod 1 under high pressure, so that the injection of the electrolyte is not affected. In the later vacuumizing stage, as shown in the right side of fig. 2, the waterproof and breathable film 13 is subjected to an upward pulling force, at this time, the other several blocking joints 14 play a role in resisting the trend of the waterproof and breathable film 13 to continue to move upwards, so that the whole waterproof and breathable film 13 is in a vertical state with the side wall of the first liquid injection rod 1, and thus in a vacuumizing link, the gas in the battery cell shell can be ensured to be pumped away, the electrolyte is still remained in the shell, and the high-pressure and low-pressure liquid injection is circularly performed according to the rule.

The design and the assembly are simple in process, and the liquid retention amount of the effective electrolyte can be increased, so that the liquid injection cycle times are reduced, the liquid injection time is saved, and the productivity is improved. In addition, the assembly can also effectively avoid the problem of cross contamination during the injection of various electrolyte, and meets the requirements of certain special processes.

Fig. 3 is a schematic structural diagram of another cell electrolyte injection device according to an embodiment of the present application, as shown in fig. 3 and 4; fig. 4 is a schematic diagram of another embodiment of the present application, where arrows indicate the flow direction of the gas.

In some embodiments of the present application, the liquid injection device further comprises a rotating cylinder and a second liquid injection rod 2, wherein an output shaft of the rotating cylinder is respectively connected with the first liquid injection rod 1 and the second liquid injection rod 2, and the output shaft of the rotating cylinder, the first liquid injection rod 1 and the second liquid injection rod 2 are collinear.

In some embodiments of the present application, the waterproof and breathable membrane 13 is fixedly connected to the inner side of the sidewall of the first pump body 11, and the outer contour of the waterproof and breathable membrane 13 is fitted to the inner contour of the first pump body 11.

In some embodiments of the present application, the second liquid injection rod 2 includes a second pump body 21, a second pump head 22, and a second pump core, where the second pump body 21 has a hollow cavity, the second pump head 22 is connected to one end of the second pump body 21, and the second pump core is located in the second pump body 21 and covers a cross section of the second pump body 21, and the second pump core moves linearly along an axis direction of the second pump body 21 or rotates with an axis of the second pump body 21 as an axis.

In addition to the above embodiments, in another embodiment, the above effects can be achieved, and the two-rod liquid injection mode is adopted. The waterproof and breathable film 13 is directly and fixedly connected with the first liquid injection rod 1, and the fixing modes include, but are not limited to, hot press fixing, adhesive fixing, buckle fixing and clamp fixing.

When vacuumizing, the cylinder is rotated so that the first liquid injection rod 1 with the waterproof and breathable film 13 is aligned with the battery cell. When the liquid is injected, the rotary cylinder rotates, so that the second liquid injection rod 2 without the waterproof and breathable film 13 is aligned with the battery cell. The two rods are used alternately, and the effect is similar to that of the embodiment, and the two rods allow gas to pass through and block the circulation of electrolyte when vacuumizing.

In some embodiments of the present application, the material of the choke plug 14 includes chrome stainless steel, chrome-nickel stainless steel or chrome-manganese-nitrogen stainless steel, and the material of the waterproof and breathable film 13 includes polytetrafluoroethylene, ethylene propylene diene monomer, polyvinyl chloride, fluororubber or polyurethane.

In some embodiments of the application, injecting the cell with an electrolyte comprises:

Electrolyte is injected into the battery cell by adopting the first liquid injection rod 1, and the waterproof and breathable film 13 is opened towards the first pump head 12.

The cylindrical battery cell needing liquid injection is arranged below the first pump head 12, and one side of the first pump head 12 far away from the battery cell is connected with a first liquid injection rod 1 with a choke joint 14 and a waterproof and breathable film 13.

The injection flow is as follows: vacuumizing, injecting liquid, pressurizing, vacuumizing, pressurizing (circulating for several times), standing, injecting liquid for the second time and finishing.

In the test, 70 g, 80 g, 90 g and 110g of electrolyte are respectively injected into the patent for comparison of injection efficiency. Comparative example in comparison with the examples, the other interesting liquid steps remained identical except for the device without the choke plug 14 and the waterproof and breathable membrane 13.

Description of effects of examples and comparative examples: under the condition that the liquid injection amount is the same, compared with the comparative example, the embodiment has the advantages that the liquid injection time is shorter, the number of times of liquid injection is smaller, the device of the waterproof breathable film 13 effectively blocks the circulation of electrolyte in the vacuumizing step, the liquid injection amount of effective electrolyte in one cycle is increased, the liquid injection times are reduced, and the liquid injection efficiency is improved. In addition, in the case where the injection time is the same (the example and the comparative example are 44.6 or 71 min), the injection amount of the example is more, which is significant for improving the productivity.

It should be noted that, the secondary injection here means repeated injection, and in practice, in the examples and comparative examples, when the electrolyte in the cell does not reach the required amount after the secondary injection, the secondary injection further includes a third injection or even more.

exchanging the positions of the first liquid injection rod 1 and the second liquid injection rod 2 by adopting a rotary cylinder;

And injecting electrolyte into the battery cell by adopting the second electrolyte injection rod 2.

Compared with the prior art, the method and the device can realize at least the following beneficial effects by applying the embodiment of the application: according to the embodiment of the application, the waterproof and breathable film 13 is arranged on the inner side of the side wall of the first pump body 11, when the first liquid injection rod 1 is adopted for vacuumizing, the waterproof and breathable film 13 covers the cross section of the first pump body 11 and only allows gas in the battery cell shell to pass through, so that the circulation of electrolyte is blocked. Therefore, the optimized liquid injection mode can effectively reduce the actual liquid injection times, save the liquid injection time and improve the liquid injection efficiency; and the phenomenon of cross contamination of the electrolyte caused by the vacuumizing process can be effectively avoided when two or more electrolyte types are needed for filling.

In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are exemplary directions or positional relationships based on the drawings, are for convenience of description or simplification of description of the embodiments of the present application, and do not indicate or imply that the devices or components referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present application.

The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a part of the embodiments of the present application, and it should be noted that, for those skilled in the art, other similar implementation means based on the technical idea of the present application may be adopted without departing from the technical idea of the solution of the present application, which is also within the protection scope of the embodiments of the present application.

Claims

1. The battery cell electrolyte injection device is characterized by comprising a first electrolyte injection rod;

2. The cell priming device of claim 1, wherein the first priming lever further comprises a plurality of barrier tabs connected to the inside of the sidewall of the first pump body, the waterproof breathable membrane being connected to at least one of the barrier tabs, the distance between any two adjacent barrier tabs being equal.

3. The cell priming device of claim 2, wherein said waterproof and breathable membrane is rotatably connected to one of said barrier tabs, wherein a travel limit of said waterproof and breathable membrane comprises a side of said waterproof and breathable membrane facing said first pump head with one of said barrier tabs as an axis, and wherein said waterproof and breathable membrane abuts the other of said barrier tabs.

4. The cell electrolyte injection apparatus of claim 3 wherein the first electrolyte injection rod further comprises a rotating shaft, wherein an edge of the waterproof and gas-permeable membrane is connected to the rotating shaft, wherein the rotating shaft is connected to one of the resistance tabs, and wherein the waterproof and gas-permeable membrane rotates about the rotating shaft.

5. The cell priming device of claim 3, wherein said waterproof breathable membrane comprises an open state parallel to said first pump body sidewall and a blocked state perpendicular to said first pump body sidewall.

6. The cell electrolyte injection device of claim 2, wherein the block is rectangular.

7. The cell priming device of claim 1, further comprising a rotating cylinder and a second priming lever, wherein an output shaft of the rotating cylinder is respectively connected to the first priming lever and the second priming lever, and wherein the output shaft of the rotating cylinder, the first priming lever and the second priming lever are collinear.

8. The cell electrolyte injection device of claim 7, wherein the waterproof and breathable membrane is fixedly connected to the inner side of the side wall of the first pump body, and an outer contour of the waterproof and breathable membrane is attached to an inner contour of the first pump body.

9. The cell electrolyte injection device of claim 8, wherein the means for securing the waterproof gas permeable membrane to the first pump body comprises heat press securing, adhesive securing, snap securing, or clamp securing.

10. The cell priming device of claim 7, wherein the second priming lever comprises a second pump body, a second pump head, and a second pump core, the second pump body has a hollow cavity, the second pump head is connected to one end of the second pump body, the second pump core is located in the second pump body and covers a cross section of the second pump body, and the second pump core moves linearly along an axis direction of the second pump body or rotates with the axis of the second pump body as an axis.