Battery liquid injection amount limiting device

Abstract

The utility model discloses a battery liquid injection quantity limiting device which comprises a residual liquid tank, a vacuum generator and a limiting liquid extraction needle head, and an emptying valve is arranged at the bottom end of the residual liquid tank; a liquid level observation meter is arranged on the side wall of the residual liquid tank; two air pipe joints are arranged at the top end of the residual liquid tank, one air pipe joint is connected with the limiting liquid extraction needle through an air pipe, the other air pipe joint is connected with the vacuum generator through an air pipe, and an air pressure regulating valve is arranged on the air pipe connected with the vacuum generator; and a stop block is arranged on the limiting liquid extraction needle head. According to the battery liquid injection quantity limiting device, the consistency of the liquid level after the interior of the battery enters a test can be ensured, and the battery is prevented from being scrapped due to liquid channeling and liquid spraying in the test process of the battery.

Description

Technical Field

[0001] The utility model relates to a battery liquid filling amount limiting device. Background Art

[0002] During the production process of aqueous sodium-ion batteries, the test phase begins after the liquid is filled and allowed to stand. Due to differences in battery cell performance, the liquid level may be too high. Since the liquid level cannot be confirmed during the test, the upper limit and consistency of the liquid level in the battery cannot be guaranteed, which may cause electrolyte leakage and spraying during the battery test, resulting in poor battery performance and the battery being scrapped. Utility Model Content

[0003] The utility model aims to overcome the defects of the prior art and provide a battery liquid filling amount limiting device, which can ensure the consistency of the liquid level inside the battery after the test, and avoid the battery being scrapped due to liquid leakage and liquid spraying during the test.

[0004] The technical solution to achieve the above purpose is: a battery liquid filling amount limiting device, including a residual liquid tank, a vacuum generator and a limiting liquid extraction needle, wherein:

[0005] A vent valve is provided at the bottom end of the residual liquid tank;

[0006] A liquid level sight gauge is provided on the side wall of the residual liquid tank;

[0007] Two air pipe joints are arranged at the top of the residual liquid tank, one of which is connected to the limit liquid extraction needle through an air pipe, and the other is connected to the vacuum generator through an air pipe, and an air pressure regulating valve is arranged on the air pipe connected to the vacuum generator;

[0008] A stopper is arranged on the position-limiting liquid extraction needle.

[0009] In the above-mentioned battery filling amount limiting device, the limiting liquid extraction needle is vertically inserted into the battery from the top of the battery, and the lower end surface of the stopper on the limiting liquid extraction needle is tightly attached to the top surface of the battery.

[0010] In the above-mentioned battery liquid filling amount limiting device, a handle is provided on the top of the residual liquid tank.

[0011] The battery liquid filling amount limiting device of the utility model can ensure the consistency of the liquid level inside the battery after the test, and avoid the battery being scrapped due to liquid leakage and liquid spraying during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the battery liquid filling amount limiting device of the utility model. DETAILED DESCRIPTION

[0013] In order to enable those skilled in the art to better understand the technical solution of the utility model, the specific implementation method thereof is described in detail below in conjunction with the accompanying drawings:

[0014] See also Figure 1 The best embodiment of the utility model is a battery liquid filling amount limiting device, which includes a residual liquid tank 1, a vacuum generator 2 and a limiting liquid extraction needle 3.

[0015] The bottom end of the residual liquid tank 1 is provided with a vent valve 11; the side wall of the residual liquid tank 1 is provided with a liquid level observation meter 12; the top of the residual liquid tank 1 is provided with two air pipe joints 13 and 14, one of which is connected to the limit liquid extraction needle 3 through the air pipe 4, and the other air pipe joint 14 is connected to the vacuum generator 2 through the air pipe 4, and the air pressure regulating valve 15 is provided on the air pipe 14 connected to the vacuum generator 2. A handle 16 is provided at the top of the residual liquid tank 1.

[0016] A stopper 31 is provided on the position-limiting liquid extraction needle 3 .

[0017] The limiting liquid extraction needle 3 is vertically inserted into the battery 100 from the top of the battery, and the lower end surface of the stopper 31 on the limiting liquid extraction needle 3 is tightly attached to the top surface of the battery 100. In this way, the limiting liquid extraction needle 3 is inserted into each battery cavity to a consistent depth. After starting the vacuum generator 2, the excess liquid in the battery cavity can be extracted to the residual liquid tank 1 through the limiting liquid extraction needle 3.

[0018] The battery filling amount limiting device of the utility model, when in use, makes the residual liquid tank 1 and the limiting liquid extraction needle 3 always in a negative pressure state through the vacuum generator 2, and the air pressure can be adjusted through the air pressure regulating valve 15. The limiting liquid extraction needle 3 has a consistent length and is limited by a stopper 31 to ensure the consistency of the liquid extracted from each battery cavity. The liquid level in the tank is confirmed by the liquid level observation meter 12 on the residual liquid tank 1, and excessive liquid can be discharged in time through the vent valve 11.

[0019] In summary, the battery liquid filling amount limiting device of the present invention can ensure the consistency of the liquid level inside the battery after the test, and avoid the battery being scrapped due to liquid leakage and spraying during the test.

[0020] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A battery liquid filling amount limiting device, characterized in that: It includes a residual liquid tank, a vacuum generator and a limit liquid extraction needle, wherein: A vent valve is provided at the bottom end of the residual liquid tank; A liquid level sight gauge is provided on the side wall of the residual liquid tank; Two air pipe joints are arranged at the top of the residual liquid tank, one of which is connected to the limit liquid extraction needle through an air pipe, and the other is connected to the vacuum generator through an air pipe, and an air pressure regulating valve is arranged on the air pipe connected to the vacuum generator; A stopper is arranged on the position-limiting liquid extraction needle.

2. A battery liquid filling amount limiting device according to claim 1, characterized in that: The position-limiting liquid extraction needle is vertically inserted into the battery from the top of the battery, and the lower end surface of the stopper on the position-limiting liquid extraction needle is tightly attached to the top surface of the battery.

3. A battery liquid filling amount limiting device according to claim 1, characterized in that: A handle is arranged on the top of the residual liquid tank.

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