Liquid injection hole structure, battery top cover plate and battery

Abstract

The utility model provides a liquid injection hole structure, a battery top cover plate and a battery, and relates to the technical field of batteries, the liquid injection hole structure comprises a liquid injection main body, a through liquid injection channel is arranged in the liquid injection main body, and a liquid injection hopper structure and a standby cutting part are sequentially arranged on the liquid injection main body; wherein the standby cutting part is close to one side, used for being connected with a battery top cover plate, of the liquid injection main body, and secondary sealing or liquid injection can be carried out after cutting is carried out at the standby cutting part. Therefore, by arranging the liquid injection hole structure with the standby cutting part on the top cover plate of the battery, the battery can be reworked in the production process, the yield of a production line is improved, and a maintenance channel is reserved for subsequent battery maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid injection hole structure, a battery top cover plate and a battery. Background Art

[0002] A hole is punched on the top cover of the lithium battery for electrolyte injection. After the battery is formed, the injection hole is plugged with a sealing nail and then covered with a sealing aluminum sheet and sealed with laser welding. The main drawback of this method is that if the battery fails in the welding and sealing process of the injection hole, it cannot be reworked and repaired, which will cause the entire battery to be scrapped and the scrapping cost is high; the battery cannot be refilled, vented or otherwise maintained subsequently; in response to the above drawbacks, this application is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a liquid injection hole structure, a battery top cover plate and a battery. By designing a plurality of liquid injection holes connected in series, the battery can be reworked during the production process, the qualified rate of the production line can be improved, and a maintenance channel can be reserved for subsequent battery maintenance.

[0004] In order to solve the above problems, the utility model provides a liquid injection hole structure, including a liquid injection body, in which a liquid injection channel is arranged, and a liquid injection bucket structure and a spare cutting part are arranged on the liquid injection body in sequence, wherein the spare cutting part is close to a side of the liquid injection body for connecting with a battery top cover plate, and secondary sealing or liquid injection can be performed after cutting at the spare cutting part.

[0005] According to an embodiment of the present invention, a cutting groove is provided on the outer surface of the standby cutting portion.

[0006] According to an embodiment of the present invention, the number of the cutting grooves or spare cutting portions is several.

[0007] According to an embodiment of the utility model, the injection channel includes a spare section and a terminal section which are arranged in sequence, the spare section is located at the spare cutting portion, the terminal section is located at the connection position between the injection body and the battery top cover plate, and the diameter of the spare section is greater than the diameter of the terminal section.

[0008] According to an embodiment of the utility model, the injection channel further includes a connecting section, the connecting section connects the injection bucket structure and the standby section, and the diameter of the connecting section is smaller than the diameter of the standby section.

[0009] According to an embodiment of the present invention, the connecting section and the spare section have the same diameter.

[0010] According to an embodiment of the utility model, the outer diameter of the liquid injection body changes with the change of the liquid injection channel.

[0011] A battery top cover plate is provided with the above-mentioned liquid injection hole structure installed on the battery top cover plate.

[0012] A battery is provided with the battery top cover plate mentioned above.

[0013] The beneficial effect of the utility model is that when a poor seal occurs, the outermost injection hole can be cut at the spare cutting portion as required and then resealed at the next injection hole. For batteries that need to be supplemented with electrolyte, the outermost injection hole can be cut as required, and then the electrolyte can be injected and supplemented at the next injection hole. After the replenishment is completed, the injection hole can be resealed. Therefore, by providing an injection hole structure with a spare cutting portion on the battery top cover plate, the battery can be reworked during the production process, the qualified rate of the production line can be improved, and a maintenance channel can be reserved for subsequent battery maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the injection hole structure;

[0016] Figure 2 This is a schematic diagram of the overall structure of the injection hole structure from another perspective;

[0017] Figure 3 is a cross-sectional view of the injection hole structure;

[0018] Figure 4 This is a schematic diagram of the front structure of the battery top cover;

[0019] Figure 5 This is a schematic diagram of the back structure of the battery top cover. DETAILED DESCRIPTION

[0020] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0021] [Example 1]

[0022] A liquid injection hole structure, such as Figure 1, including a liquid injection body 11, the material of the liquid injection body 11 can be AL, the same material as the flat aluminum plate of the battery top cover plate, and connected to the top cover plate sealing chain by laser welding. A liquid injection channel 15 is provided in the liquid injection body 11, and a liquid injection hopper structure 12 and a spare cutting part 13 are sequentially provided on the liquid injection body 11, wherein the spare cutting part 13 is close to the side of the liquid injection body 11 for connecting with the battery top cover plate, and secondary sealing or liquid injection can be performed after cutting at the spare cutting part 13.

[0023] Specifically, during the battery production process, liquid is injected at the injection hopper structure 12, and after completion, the injection hole of the injection channel 15 is sealed. When a poor seal occurs, the outermost injection hole can be cut at the spare cutting portion 13 as required and then resealed at the next injection hole.

[0024] During the battery recycling and cascade utilization process, after the battery is tested, for batteries that need to be supplemented with electrolyte, the outermost injection hole can be cut as required, and the electrolyte can be injected and supplemented at the next injection hole. After the replenishment is completed, the injection hole can be resealed.

[0025] This makes it possible to design multiple injection holes in series on the battery top cover plate, so that the battery can be reworked during the production process, the production line qualification rate can be improved, and a maintenance channel can be reserved for subsequent battery maintenance.

[0026] Furthermore, if Figure 1-Figure 3 A cutting groove 14 is provided on the outer surface of the spare cutting portion 13 to facilitate later cutting positioning and rapid cutting, improve cutting efficiency and ensure a smooth incision effect.

[0027] like Figure 1 , Figure 3 The injection channel 15 includes a connecting section 151, a spare section 152 and a terminal section 153 which are arranged in sequence. The spare section 152 is located at the position of the spare cutting portion 13, and the terminal section 153 is located at the connection position between the injection body 11 and the battery top cover plate. The connecting section 151 connects the injection bucket structure 12 and the spare section 152. The diameter of the connecting section 151 is smaller than the inner diameter of the injection bucket structure 12 and the diameter of the spare section 152, which is convenient for injection and sealing. The diameter of the spare section 152 is larger than the diameter of the terminal section 153. After cutting, the injection bucket structure is formed again at the position of the spare cutting portion 13, which is convenient for injection. Preferably, the connecting section 151 has the same diameter as the spare section 152. After injection through the spare cutting portion 13, convenient sealing of the terminal section 153 with a smaller diameter can be achieved.

[0028] Furthermore, the outer diameter of the injection body 11 changes with the change of the inner diameter of the injection channel 15, that is, Figure 3 As shown, the effect of saving materials is achieved.

[0029] Embodiment 2, based on embodiment 1, multiple spare cutting parts 13 are provided to achieve multiple cutting uses, and multiple cutting grooves 14 can also be provided at one spare cutting part 13 to achieve multiple cutting uses. In this way, sealing is performed at the top after cutting when sealing is required.

[0030] A battery top cover plate, such as Figure 4 , Figure 5 The battery top cover plate 2 is protrudingly mounted with the injection hole structure 1 in the above-mentioned embodiment 1 or 2, and the battery top cover plate 1 is also provided with a positive electrode column 22, a negative electrode column 23, an explosion-proof valve 21 and a lower plastic 24.

[0031] A battery is provided with the battery top cover plate mentioned above.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A liquid injection hole structure, characterized in that: The invention comprises a liquid injection body (11), wherein a liquid injection channel (15) is provided through the liquid injection body (11), and a liquid injection hopper structure (12) and a spare cutting portion (13) are provided on the liquid injection body (11) in sequence, wherein the spare cutting portion (13) is close to a side of the liquid injection body (11) for connecting with a battery top cover plate, and secondary sealing or liquid injection can be performed after cutting at the spare cutting portion (13).

2. The liquid injection hole structure according to claim 1, characterized in that: A cutting groove (14) is provided on the outer surface of the standby cutting portion (13).

3. The liquid injection hole structure according to claim 2, characterized in that: The number of the cutting grooves (14) or spare cutting portions (13) is several.

4. The liquid injection hole structure according to any one of claims 1 to 2, characterized in that: The injection channel (15) comprises a standby section (152) and a terminal section (153) which are arranged in sequence, wherein the standby section (152) is located at the position of the standby cutting portion (13), and the terminal section (153) is located at the connection position between the injection body (11) and the battery top cover plate, and the diameter of the standby section (152) is greater than the diameter of the terminal section (153).

5. The liquid injection hole structure according to claim 4, characterized in that: The liquid injection channel (15) further comprises a connecting section (151), wherein the connecting section (151) connects the liquid injection bucket structure (12) and the standby section (152), and the diameter of the connecting section (151) is smaller than the diameter of the standby section (152).

6. The liquid injection hole structure according to claim 5, characterized in that: The connecting section (151) and the spare section (152) have the same diameter.

7. The liquid injection hole structure according to claim 6, characterized in that: The outer diameter of the liquid injection body (11) changes with the change of the liquid injection channel (15).

8. A battery top cover plate, characterized in that: The battery top cover plate is provided with a liquid injection hole structure as claimed in any one of claims 1 to 7.

9. A battery, characterized in that: The battery top cover plate as claimed in claim 8 is installed on the battery.

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