Liquid injection sleeve for liquid injection of lithium ion battery

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a liquid injection sleeve for liquid injection of a lithium ion battery, and adopts the technical scheme that the liquid injection sleeve comprises a liquid injection sleeve body and a movable plate, a fixed frame is mounted on the side surface of the liquid injection sleeve body, and springs are symmetrically mounted on the inner side of the fixed frame; a movable plate is installed at the ends, deviating from the fixing frame, of the two springs, a movable rod is installed on the side, deviating from the liquid injection sleeve body, of the movable plate, a movable hole is formed in the portion, on the opposite sides of the two springs, of the fixing frame, the end, deviating from the movable plate, of the movable rod penetrates through the movable hole, and a liquid outlet head is installed at the bottom of the liquid injection sleeve body. The liquid injection sleeve has the advantage that the tab is fixed on the outer side of the liquid injection sleeve body during liquid injection, so that electrolyte is prevented from being contacted with the tab.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, in particular to a liquid injection sleeve for lithium-ion battery liquid injection. Background Technique

[0002] Ion batteries are rechargeable batteries with lithium ions as the main carriers. They are common rechargeable batteries and are usually used in fields such as mobile devices, electric vehicles, and energy storage systems. Lithium-ion batteries usually have high energy density, long cycle life, and low self-discharge rate, so they are widely used in various electronic devices.

[0003] As a new type of green energy, lithium-ion batteries have been widely used in fields such as digital products, power vehicles, and energy storage systems. During the liquid injection process of lithium-ion batteries, the electrolyte is likely to come into direct contact with the positive electrode tab. After the battery is injected with liquid, it is necessary to clean the electrolyte remaining on the surface of the tab. In the actual production process, the tab is often not wiped clean, resulting in poor soldering between the tab and the cap. In severe cases, there will be a fire phenomenon, affecting production safety. Content of the Utility Model

[0004] The purpose of the utility model is to provide a liquid injection sleeve for lithium-ion battery liquid injection, which has the advantage of fixing the tab outside the liquid injection sleeve body during liquid injection to avoid contact between the electrolyte and the tab, and solves the problem that the electrolyte is likely to contact the positive electrode tab during liquid injection.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A liquid injection sleeve for lithium-ion battery liquid injection, including a liquid injection sleeve body and a movable plate. A fixing frame is installed on the side of the liquid injection sleeve body. Springs are symmetrically installed inside the fixing frame. One end of each of the two springs away from the fixing frame is installed with a movable plate. A movable rod is installed on the side of the movable plate away from the liquid injection sleeve body. A movable hole is opened in the fixing frame on the opposite side of the two springs. One end of the movable rod away from the movable plate passes through the movable hole. A liquid outlet head is installed at the bottom of the liquid injection sleeve body.

[0006] When using the liquid injection sleeve for lithium-ion battery liquid injection in this technical solution, insert the liquid outlet head at the bottom of the liquid injection sleeve body into the battery through the handle. Pull the movable rod with a pull plate. The movable rod drives the movable plate to move, separating the movable plate from the tab groove. Insert the tab at the top of the battery into the tab groove on the side of the liquid injection sleeve body. Release the pull plate. The movable plate presses and fixes the tab in the tab groove through the elastic force of the spring. The electrolyte enters the inside of the liquid injection sleeve body from the liquid injection port. The electrolyte inside the liquid injection sleeve body is transported to the inside of the battery through the liquid outlet head.

[0007] Preferably, a liquid injection port is opened at the top of the liquid injection sleeve body. The electrolyte enters the inside of the liquid injection sleeve body from the liquid injection port.

[0008] Preferably, a handle is installed on the side of the liquid injection sleeve body facing away from the fixing bracket. Using the handle makes it convenient to carry and move the liquid injection sleeve body.

[0009] Preferably, a tab groove is formed on the side of the liquid injection sleeve body opposite to the movable plate, and the movable plate is parallel to the tab groove. The battery tab can be inserted into the tab groove, and the movable plate can apply pressure to the tab through the elastic force of the spring.

[0010] Preferably, a pull plate is installed at the end of the movable rod facing away from the movable plate, and the outer diameter of the pull plate is larger than the inner diameter of the movable hole. Using the pull plate can pull the movable rod, and the movable rod moves in the movable hole. The pull plate prevents the movable rod from slipping out of the movable hole.

[0011] Preferably, a baffle is installed on the top of the liquid injection sleeve body above the movable plate. The baffle prevents the electrolyte from falling onto the movable plate.

[0012] Preferably, a sealing ring is installed outside the liquid outlet head. The sealing ring improves the sealing performance during liquid discharge.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] By providing a movable plate and a tab groove, the present utility model uses a pull plate to pull the movable rod, the movable rod drives the movable plate to move, separates the movable plate from the tab groove, inserts the tab at the top of the battery into the tab groove on the side of the liquid injection sleeve body, releases the pull plate, and the movable plate presses and fixes the tab in the tab groove through the elastic force of the spring. The electrolyte enters the interior of the liquid injection sleeve body from the liquid injection port, and the electrolyte inside the liquid injection sleeve body is transported to the interior of the battery through the liquid outlet head, achieving the effect of fixing the tab outside the liquid injection sleeve body during liquid injection and preventing the electrolyte from contacting the tab. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a first-angle three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a second-angle three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 3 is a third-angle three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 4 is a fourth-angle three-dimensional structural schematic diagram of the present utility model.

[0019] In the figure: 1. injection sleeve body; 2. fixing frame; 3. spring; 4. baffle; 5. injection port; 6. handle; 7. liquid outlet head; 8. sealing ring; 9. pole ear groove; 10. pull plate; 11. movable rod; 12. movable plate; 13. movable hole. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Embodiment 1

[0025] like Figures 1-4 As shown, the utility model provides a liquid injection sleeve for lithium-ion battery injection, comprising a liquid injection sleeve body 1 and a movable plate 12, a fixing frame 2 is installed on the side of the liquid injection sleeve body 1, springs 3 are symmetrically installed on the inner side of the fixing frame 2, the movable plate 12 is installed on the end of the two springs 3 away from the fixing frame 2, and a movable rod 11 is installed on the side of the movable plate 12 away from the liquid injection sleeve body 1, and a movable hole 13 is opened on the fixing frame 2 on the side opposite to the two springs 3, and the end of the movable rod 11 away from the movable plate 12 A pull plate 10 is installed at the end of the movable rod 11 that passes through the movable hole 13 and faces away from the movable plate 12. The outer diameter of the pull plate 10 is larger than the inner diameter of the movable hole 13. A pole ear groove 9 is provided on the side of the injection sleeve body 1 opposite to the movable plate 12. The movable plate 12 is parallel to the pole ear groove 9. A liquid injection port 5 is provided on the top of the injection sleeve body 1. A liquid discharge head 7 is installed at the bottom of the injection sleeve body 1. A handle 6 is installed on the side of the injection sleeve body 1 that faces away from the fixed frame 2. A sealing ring 8 is installed on the outer side of the liquid discharge head 7.

[0026] In this embodiment, the liquid outlet head 7 at the bottom of the liquid injection sleeve body 1 is inserted into the battery through the handle 6. The movable rod 11 is pulled by the pull plate 10, and the movable rod 11 drives the movable plate 12 to move, so that the movable plate 12 is separated from the ear groove 9. The ear at the top of the battery is inserted into the ear groove 9 on the side of the liquid injection sleeve body 1. The pull plate 10 is released, and the movable plate 12 presses and fixes the ear in the ear groove 9 by the elastic force of the spring 3. The electrolyte enters the liquid injection sleeve body 1 from the liquid injection port 5, and the electrolyte in the liquid injection sleeve body 1 is transported from the liquid outlet head 7 into the battery.

[0027] Embodiment Two

[0028] As Figures 1-4 shown, a liquid injection sleeve for lithium-ion battery liquid injection proposed by the present utility model, compared with Embodiment One, this embodiment further includes: a baffle 4, and a baffle 4 is installed at the top of the liquid injection sleeve body 1 above the movable plate 12.

[0029] In this embodiment, through the baffle 4, the electrolyte is prevented from falling into the ear groove 9.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A liquid injection sleeve for lithium ion battery injection, comprising a liquid injection sleeve body (1) and a movable plate (12), characterized in that: A fixing frame (2) is installed on the side of the injection sleeve body (1), and springs (3) are symmetrically installed on the inner side of the fixing frame (2). A movable plate (12) is installed on the end of the two springs (3) away from the fixing frame (2), and a movable rod (11) is installed on the side of the movable plate (12) away from the injection sleeve body (1). A movable hole (13) is opened on the fixing frame (2) on the side opposite to the two springs (3), and one end of the movable rod (11) away from the movable plate (12) passes through the movable hole (13). A liquid outlet head (7) is installed at the bottom of the injection sleeve body (1).

2. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: The top of the liquid injection sleeve body (1) is provided with a liquid injection port (5).

3. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: A handle (6) is installed on the side of the injection sleeve body (1) facing away from the fixing frame (2).

4. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: A pole lug groove (9) is provided on the side of the liquid injection sleeve body (1) opposite to the movable plate (12), and the movable plate (12) is parallel to the pole lug groove (9).

5. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: A pull plate (10) is installed at one end of the movable rod (11) away from the movable plate (12), and the outer diameter of the pull plate (10) is larger than the inner diameter of the movable hole (13).

6. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: A baffle (4) is installed on the top of the liquid injection sleeve body (1) above the movable plate (12).

7. The liquid injection sleeve for lithium-ion battery injection according to claim 1, characterized in that: A sealing ring (8) is installed on the outer side of the liquid outlet head (7).

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