CN218975750U

CN218975750U - Battery priming device and system

Info

Publication number: CN218975750U
Application number: CN202223469185.XU
Authority: CN
Inventors: 邵小龙; 刘小舟; 周浩; 李璐璐; 杨军辉
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-05
Anticipated expiration: 2032-12-22

Abstract

The utility model provides a battery electrolyte injection device and a battery electrolyte injection system, wherein the battery electrolyte injection device is used for injecting electrolyte into a shell of a cylindrical battery, the electrolyte injection device comprises a device main body and an electrolyte injection pipe arranged on the device main body, a separated electrolyte injection cavity and a negative pressure cavity are arranged in the device main body, the device main body is provided with an electrolyte injection port used for communicating external liquid supply equipment and a vent hole used for communicating an external air source, the electrolyte injection port and the electrolyte injection pipe are both communicated with the electrolyte injection cavity, the vent hole is communicated with the negative pressure cavity, and when the device main body is in sealing connection with the shell, the electrolyte injection pipe can be inserted into the shell, and the negative pressure cavity is communicated with the inside of the shell. According to the battery electrolyte injection device, the electrolyte injection cavity and the negative pressure cavity are arranged in the device main body and are communicated with external equipment through the electrolyte injection port and the air vent respectively, so that the vacuum suction is realized while the electrolyte is injected into the battery, the infiltration efficiency of the electrolyte is improved, and meanwhile, the reliability of the electrolyte injection into the battery shell is improved.

Description

Battery priming device and system

Technical Field

The utility model relates to the technical field of cylindrical battery liquid injection, in particular to a battery liquid injection device. The utility model also relates to a battery liquid injection system comprising the battery liquid injection device.

Background

The liquid injection sleeve cup for battery liquid injection is a cylindrical cup body with two ends open and a containing cavity and a sealing ring at the outer edge. And the upper end of the battery cell is sleeved when the liquid is injected, and after the liquid is injected at normal pressure, the infiltration after the liquid injection is completed in a vacuum bin in a repeated vacuumizing and pressurizing mode.

However, this injection method has a problem of long injection time and low injection efficiency. Moreover, through the processes of repeated vacuumizing and pressurizing, the electrolyte is easy to volatilize, so that the injection amount is misaligned, and the performance of the battery is influenced. In addition, during the standing process, the liquid injection port of the battery is not completely sealed, and the electrolyte inside the battery is at risk of pollution.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery liquid injection device to improve the reliability of battery liquid injection.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery electrolyte injection device is used for injecting electrolyte into a shell of a cylindrical battery,

the liquid injection device comprises a device main body and a liquid injection pipe arranged on the device main body;

the device comprises a device main body, wherein the device main body is internally provided with a liquid injection cavity and a negative pressure cavity which are separated, the device main body is provided with a liquid injection port used for being communicated with external liquid supply equipment and a vent port used for being communicated with an external air source, the liquid injection port and the liquid injection pipe are both communicated with the liquid injection cavity, and the vent port is communicated with the negative pressure cavity;

when the device main body is in sealing connection with the shell, the liquid injection pipe can be inserted into the shell, and the negative pressure cavity is communicated with the inside of the shell.

Further, a liquid separation hole for increasing the circulation of electrolyte is formed in the side wall of the liquid injection pipe.

Further, the liquid separation holes are arranged at intervals along the height direction of the liquid injection pipe.

Further, one end of the device body can be inserted into the housing;

and a sealing structure is arranged between the device main body and the shell and is used for sealing a gap between the device main body and the shell.

Further, the sealing structure comprises a sealing gasket arranged between the outer peripheral surface of the device main body and the inner wall of the shell.

Further, the device main body comprises an outer shell and an inner shell which are connected together;

the inner shell divides the inner cavity of the device main body into the liquid injection cavity and the negative pressure cavity.

Further, a liquid injection joint and/or a ventilation joint are arranged on the device main body, one end of the liquid injection joint, which is far away from the device main body, forms the liquid injection port, and one end of the ventilation joint, which is far away from the device main body, forms the ventilation port.

Compared with the prior art, the utility model has the following advantages:

according to the battery electrolyte injection device, the electrolyte injection cavity and the negative pressure cavity are arranged in the device main body and are communicated with external equipment through the electrolyte injection port and the air vent respectively, so that the vacuum suction is realized while the electrolyte is injected into the battery, the infiltration efficiency of the electrolyte is improved, and meanwhile, the reliability of the electrolyte injection into the battery shell is improved.

In addition, through being equipped with the branch liquid hole on the lateral wall of annotating the liquid pipe, be favorable to increasing the circulation path of the electrolyte that flows from annotating in the liquid pipe, improve the infiltration efficiency of electrolyte. The liquid distribution holes are arranged at intervals along the height direction of the liquid injection pipe, so that the efficiency of liquid injection into the battery shell is improved. One end of the device body can be inserted into the shell, and a sealing structure is arranged between the device body and the shell, so that air flow can be prevented from flowing out from a gap between the device body and the shell, and the supercharging condition is influenced.

In addition, the sealing structure comprises a sealing gasket, and a groove for accommodating the sealing gasket is formed in the peripheral surface of the device main body, so that the sealing structure is simple in structure and convenient to set. The device body is provided with the liquid injection joint and the ventilation joint, so that the device is convenient to be connected with external liquid supply equipment and an external air source respectively, and the device is simple in structure and convenient to set.

Another object of the present utility model is to provide a battery filling system comprising a battery filling device as described above.

Compared with the prior art, the battery liquid injection system has the same beneficial effects as the battery liquid injection device, and is not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of the overall structure of a battery priming device according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;

fig. 3 is an assembly view of a battery priming device and a battery housing according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a device body; 101. a liquid injection cavity; 102. a negative pressure chamber; 103. a groove; 104. an inner housing; 105. an outer housing; 2. a liquid injection pipe; 201. a liquid separation hole; 3. a liquid injection joint; 4. a vent fitting; 5. a sealing gasket; 6. a housing.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically 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 utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The present embodiment relates to a battery electrolyte injection device for injecting an electrolyte into a case 6 of a cylindrical battery. In the overall configuration, as shown in fig. 1, the liquid injection device includes a device body 1, and a liquid injection tube 2 provided in the device body 1.

The device body 1 is provided with a liquid injection port for communicating external liquid supply equipment and a vent port for communicating an external air source, the liquid injection port and the liquid injection pipe 2 are both communicated with the liquid injection cavity 101, and the vent port is communicated with the negative pressure cavity 102. When the apparatus main body 1 is hermetically connected to the housing 6, the filling tube 2 can be inserted into the housing 6, and the negative pressure chamber 102 communicates with the interior of the housing 6.

The battery electrolyte injection device of this embodiment sets up the electrolyte injection chamber 101 and the negative pressure chamber 102 through setting up in the device main part 1 to communicate external equipment through annotating liquid mouth and air vent respectively, be favorable to realizing annotating the vacuum in the inside of battery, improve the infiltration efficiency of electrolyte, improve the reliability of annotating the inside liquid of battery casing simultaneously.

Based on the overall description of the above structure, an exemplary structure of the battery electrolyte injection device of the present embodiment is shown in fig. 1 and 2. First, in this embodiment, the electrolyte is injected into the cylindrical battery mainly for the cylindrical battery. The device body 1 in this embodiment has an inverted U-shaped structure, and the device body 1 includes an outer casing 105 and an inner casing 104 connected together, wherein the inner casing 104 separates the inner cavity of the device body 1 from the liquid injection cavity 101 and the negative pressure cavity 102.

It should be noted that, in the present embodiment, the shape of the liquid injection cavity 101 is not limited to a cylindrical shape, and may be other shapes, which are not particularly limited herein.

The liquid injection port and the air vent are both arranged on the bottom wall of the device main body 1, the air vent is communicated with the negative pressure cavity 102, the liquid injection port is communicated with the liquid injection cavity 101, the liquid injection pipe 2 is arranged on the other side of the liquid injection cavity 101, and when the device main body 1 is in sealing connection with the shell 6, the liquid injection pipe 2 can be inserted into the battery shell 6, so that the liquid injection process can be completed.

In order to increase the injection speed into the battery case 6, in this embodiment, as a preferred embodiment, a liquid separation hole 201 for increasing the flow of the electrolyte is provided in the side wall of the liquid injection tube 2, thereby improving the injection efficiency. And preferably, as shown in fig. 1 to 2, the liquid separation holes 201 are arranged at intervals along the height direction of the liquid injection tube 2. During the flowing of the electrolyte in the electrolyte injection pipe 2, the electrolyte can flow out through the electrolyte separation holes 201 and enter the battery case 6 for infiltration.

In the above-described mode of sealing and connecting the device body 1 and the housing 6, as a preferred embodiment, as shown in fig. 3, one end of the device body 1 can be inserted into the housing 6. And in order to enhance the sealing effect, a sealing structure for sealing a gap between the apparatus body 1 and the housing 6 is provided between the apparatus body 1 and the housing 6. As a preferred embodiment, the sealing structure includes a sealing gasket 5 provided between the outer peripheral surface of the apparatus main body 1 and the inner wall of the housing 6, and a groove 103 for accommodating the sealing gasket 5 is provided on the outer peripheral surface of the apparatus main body 1, as shown in fig. 2 and 3. The sealing gasket 5 can be fitted in the groove 103 to seal the gap between the device body 1 and the housing 6.

In addition, in this embodiment, in order to facilitate connection of the apparatus main body 1 and the external liquid supply device and the external air source. In this example, as a preferred embodiment, as shown in fig. 2 and 3, the device body 1 is provided with a liquid injection joint 3 and/or a vent joint 4, one end of the liquid injection joint 3 away from the device body 1 constitutes a liquid injection port, and one end of the vent joint 4 away from the device body 1 constitutes a vent port. The structure is simple and the setting is convenient. Of course, the present embodiment is not limited to the case where the connector is provided only in the apparatus main body 1, but may be provided in other configurations, and is not particularly limited herein. It should be understood that in this embodiment, the liquid injection connector 3 may be disposed on the device main body 1 only to facilitate connection with an external liquid supply device, or the ventilation connector 4 may be disposed on the device main body 1 only to facilitate connection with an external air source, which is not limited herein.

In the battery priming device of the present embodiment, in use, the device body 1 is inserted into the battery case 6, and the priming tube 2 provided in the device body 1 can be inserted into the battery case 6. The external gas source is communicated through the ventilation joint 4, the external liquid injection device is communicated through the liquid injection joint 3, the external liquid injection device supplies electrolyte into the liquid injection cavity 101, and part of the electrolyte is stored in the liquid injection cavity 101. And starting an external air source to carry out a vacuumizing process on the inside of the battery shell 6 through the air vent and the negative pressure cavity 102, and actively extracting electrolyte reserved in the liquid injection cavity 101 from the liquid outlet and the liquid separation hole 201 on the liquid injection pipe 2 when the air pressure in the battery shell 6 is increased, so that the process of injecting the liquid into the inside of the cylindrical battery shell 6 is completed.

The embodiment also relates to a battery liquid injection system, which comprises the battery liquid injection device.

According to the battery liquid injection system, the battery liquid injection device is adopted, so that the efficiency of liquid injection in the battery shell and the reliability of the liquid injection process can be improved, the waste of resources is reduced, and the overall use performance of the battery is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery electrolyte injection device for injecting an electrolyte into a housing (6) of a cylindrical battery, characterized in that:

the liquid injection device comprises a device main body (1) and a liquid injection pipe (2) arranged on the device main body (1);

the device comprises a device main body (1), wherein a liquid injection cavity (101) and a negative pressure cavity (102) are formed in the device main body (1), a liquid injection port used for communicating external liquid supply equipment and a vent used for communicating an external air source are formed in the device main body (1), the liquid injection port and the liquid injection pipe (2) are communicated with the liquid injection cavity (101), and the vent is communicated with the negative pressure cavity (102);

when the device main body (1) is in sealing connection with the shell (6), the liquid injection pipe (2) can be inserted into the shell (6), and the negative pressure cavity (102) is communicated with the inside of the shell (6).

2. The battery priming device of claim 1, wherein:

the side wall of the liquid injection pipe (2) is provided with a liquid separation hole (201) for increasing the circulation of electrolyte.

3. The battery priming device of claim 2, wherein:

the liquid separation holes (201) are arranged at intervals along the height direction of the liquid injection pipe (2).

4. The battery priming device of claim 1, wherein:

one end of the device body (1) can be inserted into the housing (6);

a sealing structure is arranged between the device main body (1) and the shell (6), and the sealing structure is used for sealing a gap between the device main body (1) and the shell (6).

5. The battery priming device of claim 4, wherein:

the sealing structure comprises a sealing gasket (5) arranged between the outer peripheral surface of the device main body (1) and the inner wall of the shell.

6. The battery priming device of claim 1, wherein:

the device main body (1) comprises an outer shell (105) and an inner shell (104) which are connected together;

the inner shell (104) divides the inner cavity of the device main body (1) into the liquid injection cavity (101) and the negative pressure cavity (102).

7. The battery electrolyte injection apparatus according to any one of claims 1 to 6, wherein:

the device is characterized in that a liquid injection joint (3) and/or a ventilation joint (4) are arranged on the device main body (1), one end, far away from the device main body (1), of the liquid injection joint (3) forms the liquid injection port, and one end, far away from the device main body (1), of the ventilation joint (4) forms the ventilation port.

8. A battery liquid injection system, characterized in that:

the battery priming system includes the battery priming device of any one of claims 1 to 7.