Quick-charging lithium battery electrolyte sampling device

Abstract

The utility model discloses a fast charge lithium battery electrolyte sampling device, which comprises a sample storage tube and a sleeve, the bottom end of the sample storage tube is provided with a sampling needle, the top end of the sample storage tube is provided with a liquid extraction structure, the sleeve is sleeved on the sample storage tube and can move and adjust along the axial direction of the sample storage tube, and the liquid extraction structure is arranged at the top end of the sample storage tube. The bottom end of the sleeve is provided with an annular liquid suction part which is arranged outside the sampling needle in a sleeving manner, and the inner side wall of the annular liquid suction part is attached to the outer side wall of the sampling needle so as to adsorb electrolyte on the outer side wall of the sampling needle. According to the electrolyte sampling device for the fast-charging lithium battery, residual electrolyte on the outer side wall of the sampling needle can be effectively removed after sampling is completed.

Description

Technical Field

[0001] The utility model relates to a sampling device, in particular to a sampling device for the electrolyte of a fast-charging lithium battery. Background Art

[0002] As an important component of a fast-charging lithium battery, the quality of the electrolyte has an important impact on the life, rate and safety of the fast-charging lithium battery. Therefore, after the electrolyte of the fast-charging lithium battery is produced, it needs to be sampled for detection. The existing sampling device for the electrolyte of a fast-charging lithium battery includes a sample storage tube. A sampling needle is provided at the bottom end of the sample storage tube, and a liquid pumping structure is provided at the top end of the sample storage tube. During use, the sampling needle is extended into the electrolyte placement box, and then the liquid pumping structure is operated to pump the electrolyte into the sample storage tube, thereby realizing the sampling of the electrolyte.

[0003] However, it is found during use that when the sampling is completed, some electrolyte remains on the outer side wall of the sampling needle, which may cause the electrolyte to adhere to other objects or the human body, thereby corroding the objects or harming the human body. Summary of the Invention

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a sampling device for the electrolyte of a fast-charging lithium battery, which can effectively remove the residual electrolyte on the outer side wall of the sampling needle after the sampling is completed.

[0005] The sampling device for the electrolyte of a fast-charging lithium battery according to an embodiment of the utility model includes:

[0006] A sample storage tube, a sampling needle is provided at the bottom end of the sample storage tube, and a liquid pumping structure is provided at the top end of the sample storage tube;

[0007] A sleeve tube, which is sleeved on the sample storage tube and can be axially moved and adjusted along the sample storage tube. An annular liquid suction part sleeved on the sampling needle is provided at the bottom end of the sleeve tube. The inner side wall of the annular liquid suction part fits the outer side wall of the sampling needle to adsorb the electrolyte on the outer side wall of the sampling needle.

[0008] The sampling device for the electrolyte of a fast-charging lithium battery according to an embodiment of the utility model has at least the following beneficial effects:

[0009] When it is necessary to take a sample of the electrolyte, move the sleeve upward. The sleeve drives the annular liquid suction part to move upward to the top of the sampling needle, and then extend the sampling needle into the electrolyte placement box. Operate the liquid extraction structure to draw the electrolyte into the sample storage tube, thus achieving the sampling of the electrolyte. After sampling, move the sleeve downward. The sleeve can drive the annular liquid suction part to move downward. Since the inner side wall of the annular liquid suction part fits the outer side wall of the sampling needle, the electrolyte on the outer side wall of the sampling needle can be adsorbed clean during the downward movement of the annular liquid suction part, so as to avoid the electrolyte adhering to other objects or the human body and corroding the objects or hurting the human body.

[0010] According to some embodiments of the present invention, the bottom end of the sleeve is detachably provided with an installation part. The installation part is provided with an installation groove with an open top end. The bottom end of the installation groove is provided with a first through hole for the sampling needle to pass through. The annular liquid suction part is installed in the installation groove.

[0011] According to some embodiments of the present invention, the top end of the side wall of the installation groove sleeves the bottom end of the sleeve. The sleeve is provided with a bottom plate. The bottom plate is provided with a second through hole for the sampling needle to pass through.

[0012] According to some embodiments of the present invention, the top end of the inner side wall of the installation groove is threadedly connected to the bottom end of the outer side wall of the sleeve.

[0013] According to some embodiments of the present invention, a first limiting structure is provided between the sleeve and the sample storage tube. The first limiting structure is used to limit the movement of the sleeve when the sleeve moves to make the annular liquid suction part located at the top of the sampling needle.

[0014] According to some embodiments of the present invention, the first limiting structure includes a first elastic clamping ring surrounding the outer side wall of the sample storage tube. An annular clamping groove is provided along the circumferential direction on the inner side wall of the sleeve. When the sleeve moves to make the annular liquid suction part located at the top of the sampling needle, the first elastic clamping ring is clamped in the annular clamping groove.

[0015] According to some embodiments of the present invention, the sleeve can move to make the bottom end of the annular liquid suction part flush with the bottom end of the sampling needle.

[0016] According to some embodiments of the present invention, a second limiting structure is provided between the sleeve and the sample storage tube. The second limiting structure is used to limit the movement of the sleeve when the sleeve moves to make the bottom end of the annular liquid suction part flush with the bottom end of the sampling needle.

[0017] According to some embodiments of the present utility model, the second limiting structure includes a second elastic clamping ring disposed around the outer sidewall of the sample storage tube, and an annular clamping groove is provided along the circumferential direction on the inner sidewall of the sleeve. When the sleeve moves to make the bottom end of the annular liquid suction part flush with the bottom end of the sampling needle, the second elastic clamping ring is clamped in the annular clamping groove.

[0018] According to some embodiments of the present utility model, the liquid pumping structure is arranged as an elastic airbag, and the elastic airbag is hermetically connected to the sample storage tube.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram when the sleeve is in one position;

[0023] Figure 3 is a schematic diagram when the sleeve is in another position;

[0024] Figure 4 is Figure 2 an enlarged view at A.

[0025] Reference numerals in the drawings:

[0026] Sample storage tube 100; Sampling needle 101; Liquid pumping structure 102; First elastic clamping ring 103; Second elastic clamping ring 104;

[0027] Sleeve 200; Annular liquid suction part 201; Mounting part 202; Mounting groove 203; First through hole 204; Bottom plate 205; Second through hole 206; Annular clamping groove 207. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, it should be understood that when it comes to orientation descriptions, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, "plurality" refers to two or more. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0031] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "install", "connect", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0032] Next, refer to Figures 1 to 4 Describe a fast-charging lithium battery electrolyte sampling device according to an embodiment of the present utility model.

[0033] As Figures 1 to 4 shown, a fast-charging lithium battery electrolyte sampling device according to an embodiment of the present utility model includes:

[0034] A sample storage tube 100, a sampling needle 101 is provided at the bottom end of the sample storage tube 100, and a liquid pumping structure 102 is provided at the top end of the sample storage tube 100;

[0035] A sleeve 200, which is sleeved on the sample storage tube 100 and can be axially moved and adjusted along the sample storage tube 100. A ring-shaped liquid suction part 201 sleeved outside the sampling needle 101 is provided at the bottom end of the sleeve 200. The inner side wall of the ring-shaped liquid suction part 201 is in contact with the outer side wall of the sampling needle 101 to adsorb the electrolyte on the outer side wall of the sampling needle 101.

[0036] For the fast-charging lithium battery electrolyte sampling device according to an embodiment of the present utility model, when it is necessary to sample the electrolyte, the sleeve 200 is moved upward. The sleeve 200 drives the annular liquid absorption part 201 to move upward to the top of the sampling needle 101. Then, the sampling needle 101 is extended into the electrolyte placement box, and the liquid extraction structure 102 is operated to pump the electrolyte into the sample storage tube 100, thereby realizing the sampling of the electrolyte. After the sampling is completed, the sleeve 200 is moved downward. The sleeve 200 can drive the annular liquid absorption part 201 to move downward. Since the inner side wall of the annular liquid absorption part 201 fits the outer side wall of the sampling needle 101, the electrolyte on the outer side wall of the sampling needle 101 can be adsorbed cleanly during the downward movement of the annular liquid absorption part 201, thereby avoiding the electrolyte from adhering to other objects or the human body and corroding the objects or harming the human body.

[0037] It should be noted that the inner diameter of the sleeve 200 can be slightly larger than the outer diameter of the sample storage tube 100 to facilitate the axial movement adjustment of the sleeve 200 along the sample storage tube 100. The annular liquid absorption part 201 is provided with a through hole for the sampling needle 101 to pass through. The annular liquid absorption part 201 can be prepared from glass fiber cotton, sponge or other suitable adsorption materials. Even if some adsorption materials may be slightly corroded by the electrolyte, it is only necessary to replace the annular liquid absorption part 201 regularly.

[0038] In some embodiments of the present utility model, as Figures 1 to 3 shown, the bottom end of the sleeve 200 is detachably provided with an installation part 202. The installation part 202 is provided with an installation groove 203 with an open top end. The bottom end of the installation groove 203 is provided with a first through hole 204 for the sampling needle 101 to pass through. The annular liquid absorption part 201 is installed in the installation groove 203. In this embodiment, the annular liquid absorption part 201 is installed in the installation groove 203. When it is necessary to replace the annular liquid absorption part 201, it can be taken out from the top end of the installation groove 203, and it is more convenient to replace the annular liquid absorption part 201. Moreover, the annular liquid absorption part 201 is located in the installation groove 203, and the installation groove 203 is relatively closed, which can reduce the volatilization of the electrolyte on the annular liquid absorption part 201 and affect the working environment.

[0039] In some embodiments of the present utility model, as Figure 2 and 3As shown, the bottom end of the sleeve 200 is sleeved on the top end of the side wall of the installation groove 203. The sleeve 200 is provided with a bottom plate 205, and the bottom plate 205 is provided with a second through hole 206 for the sampling needle 101 to pass through. With this setting, when the annular liquid absorption part 201 needs to be replaced, the top end of the side wall of the installation groove 203 is separated from the bottom end of the sleeve 200, and then the annular liquid absorption part 201 can be taken out. It is more convenient to replace the annular liquid absorption part 201, and the top end of the installation groove 203 is blocked by the bottom plate 205. Furthermore, a more enclosed space can be formed in the installation groove 203, so as to further reduce the volatilization of the electrolyte on the annular liquid absorption part 201 and affect the working environment. It should be noted that a switchable cover plate can also be directly provided at the top end of the installation groove 203.

[0040] In some embodiments of the present invention, the top end of the inner side wall of the installation groove 203 is threadedly connected to the bottom end of the outer side wall of the sleeve 200. Specifically, the top end of the inner side wall of the installation groove 203 is provided with an internal thread, and the bottom end of the outer side wall of the sleeve 200 is provided with an external thread. The top end of the inner side wall of the installation groove 203 and the bottom end of the outer side wall of the sleeve 200 are threadedly connected through the cooperation of the internal thread and the external thread. With this setting, when the annular liquid absorption part 201 needs to be replaced, the installation part 202 is unscrewed, and then the annular liquid absorption part 201 can be taken out. It is more convenient to replace the annular liquid absorption part 201. It should be noted that the installation part 202 can also be connected to the sleeve 200 in other ways. For example, the top end of the inner side wall of the installation groove 203 and the bottom end of the outer side wall of the sleeve 200 can be clamped with each other.

[0041] In some embodiments of the present invention, as Figures 2 to 4 shown, a first limiting structure is provided between the sleeve 200 and the sample storage tube 100. The first limiting structure is used to limit the movement of the sleeve 200 when the sleeve 200 moves to make the annular liquid absorption part 201 located at the top end of the sampling needle 101. When the sleeve 200 moves to make the annular liquid absorption part 201 located at the top end of the sampling needle 101, the first limiting structure works to limit the continuous movement of the sleeve 200. Furthermore, it can not only prevent the sleeve 200 from continuing to move upward and pressing the annular liquid absorption part 201, but also prevent the sleeve 200 from suddenly moving downward during sampling and affecting sampling.

[0042] In some embodiments of the present invention, as Figures 2 to 4As shown, the first limiting structure includes a first elastic clamping ring 103 surrounding the outer wall of the sample storage tube 100. An annular clamping groove 207 is provided along the circumferential direction on the inner wall of the sleeve 200. When the sleeve 200 moves to make the annular liquid suction part 201 located at the top end of the sampling needle 101, the first elastic clamping ring 103 is clamped in the annular clamping groove 207. When the sleeve 200 moves to other positions, the first elastic clamping ring 103 compresses and elastically abuts against the inner wall of the sleeve 200. Furthermore, the first elastic clamping ring 103 does not prevent the sleeve 200 from moving. When the sleeve 200 moves to make the annular liquid suction part 201 located at the top end of the sampling needle 101, the first elastic clamping ring 103 is located inside the annular clamping groove 207, and the first elastic clamping ring 103 can be elastically clamped in the annular clamping groove 207, so as to be able to limit the continued movement of the sleeve 200. Since the first elastic clamping ring 103 can elastically deform, when it is necessary to move the sleeve 200 again, slightly pushing or pulling the sleeve 200 can make the first elastic clamping ring 103 move out of the annular clamping groove 207, thus realizing the movement of the sleeve 200. The structure is simple and convenient to use.

[0043] It should be noted that the first elastic clamping ring 103 can be prepared from elastic rubber or elastic plastic or other suitable elastic materials. In order to make it more convenient for the first elastic clamping ring 103 to be clamped into the annular clamping groove 207 or move out of the annular clamping groove 207, the cross-section of the first elastic clamping ring 103 can be semi-circular. The first limiting structure can also be other structures. For example, the first elastic clamping ring 103 can be replaced with an elastic clamping block. In addition, the annular clamping groove 207 can be provided on the outer wall of the sample storage tube 100, and the first elastic clamping ring 103 can be provided on the inner wall of the sleeve 200.

[0044] In some embodiments of the present utility model, as Figure 3 shown, the sleeve 200 can move downward to make the bottom end of the annular liquid suction part 201 flush with the bottom end of the sampling needle 101. With such a setting, the annular liquid suction part 201 can adsorb the electrolyte on the outer wall of the sampling needle 101 more comprehensively and thoroughly, so that the effect of cleaning the electrolyte on the outer wall of the sampling needle 101 is better.

[0045] In some embodiments of the present utility model, as Figure 2 and Figure 3As shown, a second limiting structure is provided between the sleeve 200 and the sample storage tube 100. The second limiting structure is used to limit the movement of the sleeve 200 when the bottom end of the annular liquid suction part 201 is flush with the bottom end of the sampling needle 101. When the sleeve 200 moves downward to make the bottom end of the annular liquid suction part 201 flush with the bottom end of the sampling needle 101, the second limiting structure works to limit the sleeve 200 from continuing to move downward. Thus, not only can it prevent the sleeve 200 from disengaging from the bottom end of the sample storage tube 100 and requiring reinstallation, but it can also prevent the annular liquid suction part 201 from moving below the sampling needle 101, which may cause the sampling needle 101 to be difficult to pass through the annular liquid suction part 201 again.

[0046] In some embodiments of the present utility model, as Figure 2 and Figure 3 shown, the second limiting structure includes a second elastic snap ring 104 disposed around the outer wall of the sample storage tube 100. An annular slot 207 is provided along the circumferential direction on the inner wall of the sleeve 200. When the sleeve 200 moves to make the bottom end of the annular liquid suction part 201 flush with the bottom end of the sampling needle 101, the second elastic snap ring 104 is snapped into the annular slot 207. When the sleeve 200 moves to other positions, the second elastic snap ring 104 compresses and elastically abuts against the inner wall of the sleeve 200. Thus, the second elastic snap ring 104 does not interfere with the movement of the sleeve 200. When the sleeve 200 moves to make the bottom end of the annular liquid suction part 201 flush with the bottom end of the sampling needle 101, the second elastic snap ring 104 is located inside the annular slot 207, and the second elastic snap ring 104 can be elastically snapped into the annular slot 207, thereby being able to limit the continued movement of the sleeve 200. Since the second elastic snap ring 104 can elastically deform, when the sleeve 200 needs to be moved again, slightly pushing or pulling the sleeve 200 can make the second elastic snap ring 104 move out of the annular slot 207, thus realizing the movement of the sleeve 200. The structure is simple and convenient to use.

[0047] It should be noted that the second elastic snap ring 104 can be made of elastic rubber, elastic plastic, or other suitable elastic materials. To make it more convenient for the second elastic snap ring 104 to be snapped into the annular slot 207 or move out of the annular slot 207, the cross-section of the second elastic snap ring 104 can be semi-circular. The second limiting structure can also be other structures. For example, the second elastic snap ring 104 can be replaced with an elastic block. In addition, the annular slot 207 can be provided on the outer wall of the sample storage tube 100, and the second elastic snap ring 104 can be provided on the inner wall of the sleeve 200.

[0048] It can be understood that only one annular slot 207 can be provided, and both the first elastic snap ring 103 and the second elastic snap ring 104 cooperate with this annular slot 207. Of course, one annular slot 207 can also be provided corresponding to both the first elastic snap ring 103 and the second elastic snap ring 104.

[0049] In some embodiments of the present utility model, as Figures 1 to 3 shown, the liquid extraction structure 102 is provided as an elastic airbag, and the elastic airbag is hermetically connected to the sample storage tube 100. Specifically, the elastic airbag has elasticity. When an external force is applied to the outer surface of the elastic airbag, it will be flattened and deflated. When the external force disappears, the elastic airbag will elastically reset and inhale. During sampling, first squeeze the outer surface of the elastic airbag, the elastic airbag is flattened and deflated. Then, extend the sampling needle 101 into the electrolyte placement box. Then, cancel the pressure on the outer surface of the elastic airbag. The elastic airbag will elastically reset and suck the air in the sample storage tube 100, so that a negative pressure is formed in the sample storage tube 100. Under the action of the negative pressure, the electrolyte in the electrolyte placement box can be sucked, thus realizing sampling. The structure is simple and the operation is convenient. It should be noted that the liquid extraction structure 102 can also be other structures. For example, it can be a liquid extraction pump.

[0050] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. A fast-charge lithium battery electrolyte sampling device, characterized in that: include: A sample storage tube, wherein the bottom end of the sample storage tube is provided with a sampling needle, and the top end of the sample storage tube is provided with a liquid extraction structure; The sleeve is sleeved with the sample storage tube and can be moved and adjusted along the axial direction of the sample storage tube. The bottom end of the sleeve is provided with an annular liquid absorption portion sleeved outside the sampling needle. The inner side wall of the annular liquid absorption portion is in contact with the outer side wall of the sampling needle to absorb the electrolyte on the outer side wall of the sampling needle.

2. The fast-charge lithium battery electrolyte sampling device according to claim 1, characterized in that: The bottom end of the sleeve is detachably provided with a mounting portion, the mounting portion is provided with a mounting groove with an open top, the bottom end of the mounting groove is provided with a first through hole for the sampling needle to pass through, and the annular liquid suction portion is installed in the mounting groove.

3. The fast-charge lithium battery electrolyte sampling device according to claim 2, characterized in that: The top end of the side wall of the mounting groove is sleeved with the bottom end of the sleeve, the sleeve is provided with a bottom plate, and the bottom plate is provided with a second through hole for the sampling needle to pass through.

4. The fast-charge lithium battery electrolyte sampling device according to claim 3, characterized in that: The top end of the inner side wall of the mounting groove is threadedly connected to the bottom end of the outer side wall of the sleeve.

5. The fast-charge lithium battery electrolyte sampling device according to any one of claims 1 to 4, characterized in that: A first limiting structure is provided between the sleeve and the sample storage tube, and the first limiting structure is used to limit the movement of the sleeve when the sleeve moves to make the annular liquid suction portion located at the top end of the sampling needle.

6. The fast-charge lithium battery electrolyte sampling device according to claim 5, characterized in that: The first limiting structure includes a first elastic clamping ring arranged around the outer wall of the sample storage tube, and the inner wall of the sleeve is provided with an annular clamping groove along the circumferential direction. When the sleeve moves so that the annular liquid suction part is located at the top end of the sampling needle, the first elastic clamping ring is clamped in the annular clamping groove.

7. The fast-charge lithium battery electrolyte sampling device according to any one of claims 1 to 4, characterized in that: The sleeve can be moved to make the bottom end of the annular liquid absorbing portion flush with the bottom end of the sampling needle.

8. The fast-charge lithium battery electrolyte sampling device according to claim 7, characterized in that: A second limiting structure is provided between the sleeve and the sample storage tube, and the second limiting structure is used to limit the movement of the sleeve when the sleeve moves to make the bottom end of the annular liquid suction part flush with the bottom end of the sampling needle.

9. The fast-charge lithium battery electrolyte sampling device according to claim 8, characterized in that: The second limiting structure includes a second elastic clamping ring arranged around the outer wall of the sample storage tube, and the inner wall of the sleeve is provided with an annular clamping groove along the circumferential direction. When the sleeve moves to make the bottom end of the annular liquid suction part flush with the bottom end of the sampling needle, the second elastic clamping ring is clamped in the annular clamping groove.

10. The fast-charge lithium battery electrolyte sampling device according to any one of claims 1 to 4, characterized in that: The liquid extraction structure is configured as an elastic airbag, and the elastic airbag is sealed and connected to the sample storage tube.

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