Lithium battery electrolyte leakage detection device and detection production line

Abstract

The utility model discloses a lithium battery electrolyte leakage detection device and a detection production line, and belongs to the technical field of lithium batteries. According to the lithium battery electrolyte leakage detection device, the first driving assembly and the second driving assembly are matched with each other to drive the detection test paper to move between the test paper identification assembly and the battery pack. The first driving assembly and the second driving assembly drive the detection test paper to the battery pack and can make contact with the battery pack to detect the electrolyte leakage condition of the battery pack. The color of the acidic electrolyte changes when the test paper is detected. The first driving assembly and the second driving assembly drive the detection test paper to the position above the test paper recognition assembly, and the test paper recognition assembly can recognize the color on the detection test paper and judge whether the battery pack leaks liquid or not. The lithium battery electrolyte leakage detection device is used for replacing traditional manual visual inspection, online control is achieved, the labor cost is saved, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and more specifically to a lithium battery electrolyte leakage detection device and a detection production line. Background Art

[0002] With the widespread use of lithium batteries, users have higher and higher requirements for the safety of lithium batteries. At the same time, manufacturers also have extremely high requirements for the quality of lithium batteries, and the process requires more inspection items, but some of the important inspection items cannot be observed from the outside of the lithium battery, such as the position of the battery cell after entering the shell, the position of the pole ear, the alignment of the pole piece, etc. If these important inspection items are not inspected, the battery risk will be uncontrollable. For example, during the production process of lithium batteries, electrolyte leakage may occur due to loose welding, unsealed welding, welding leakage, cold welding, etc. The leakage of electrolyte in the lithium battery will cause corrosion of the shell, which seriously affects the safety of the battery, so the lithium battery needs to be inspected for leakage during the production process.

[0003] The current method of detecting leakage at the lithium battery filling port on the production line is through manual visual inspection, but this method cannot confirm trace leakage and has a high miss detection rate. Utility Model Content

[0004] In view of the problems of the prior art, the utility model provides a lithium battery electrolyte leakage detection device and a detection production line. The lithium battery electrolyte leakage detection device replaces the traditional manual visual inspection, realizes online control, saves labor costs, and improves detection accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] A lithium battery electrolyte leakage detection device, comprising a frame, a test paper and a test paper identification component, and also comprising:

[0007] A first driving assembly is arranged on the frame along the X direction, the test strip is connected to the first driving assembly, and the first driving assembly can drive the test strip to move along the X direction;

[0008] A second driving assembly is arranged on the frame along the Z direction, and the first driving assembly is connected to the second driving assembly, and the second driving assembly can drive the first driving assembly and the test paper to move along the Z direction;

[0009] The first driving assembly and the second driving assembly cooperate with each other to drive the test strip to contact the battery pack, and drive the test strip to the to-be-tested position of the test strip identification assembly.

[0010] Furthermore, two ends of the test paper are respectively wound on the retractable reel assembly, and the test paper extends along the Y direction, and the retractable reel assembly drives the test paper to be retracted and released along the Y direction.

[0011] Furthermore, the reeling and unreeling assembly is fixed on a connecting plate, and the connecting plate is connected to the first driving assembly.

[0012] Furthermore, the first driving assembly is fixed on a supporting frame, and two ends of the supporting frame are respectively connected to the second driving assembly.

[0013] Furthermore, at least one guide rail is connected between the support frame and the connecting plate.

[0014] Furthermore, the first drive assembly and the second drive assembly are linear motor modules.

[0015] Furthermore, the test paper identification component is a CCD camera.

[0016] Furthermore, a first limit block is disposed at one end of the first driving assembly, and a second limit block is disposed at one end of the second driving assembly.

[0017] Furthermore, a flexible pad is also provided on the connecting plate, and the flexible pad is located on a side close to the test paper.

[0018] The utility model also provides a lithium battery detection production line, comprising a conveyor belt and any one of the lithium battery electrolyte leakage detection devices;

[0019] The battery pack is located on a conveyor belt, and the conveyor belt extends along the Y direction to drive the battery pack to be transported along the Y direction;

[0020] The lithium battery electrolyte leakage detection device is located on one side of the conveyor belt;

[0021] The first driving assembly and the second driving assembly cooperate with each other to drive the test strip to move between the test strip identification assembly and the battery pack.

[0022] The technical solution provided by the utility model has the following beneficial effects compared with the prior art: the first drive assembly and the second drive assembly in the lithium battery electrolyte leakage detection device cooperate with each other to drive the test paper to move between the test paper identification assembly and the battery pack. The first drive assembly and the second drive assembly drive the test paper to the battery pack and can contact the battery pack to detect the electrolyte leakage of the battery pack. The acidic electrolyte changes color on the test paper. The first drive assembly and the second drive assembly drive the test paper to the top of the test paper identification assembly, and the test paper identification assembly can identify the color on the test paper to determine whether the battery pack is leaking. The lithium battery electrolyte leakage detection device replaces the traditional manual visual inspection, realizes online control, saves labor costs, and improves the detection accuracy. The test paper is driven to move by the dual-axis drive of the first drive assembly and the second drive assembly. First, the test paper can be moved in multiple directions, which is convenient for the lithium battery electrolyte leakage detection device in this embodiment to be set next to the lithium battery detection production line. Secondly, the position of the test paper can be more accurately controlled to improve the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a lithium battery electrolyte leakage detection device.

[0024] Description of labels:

[0025] 1. Battery pack; 2. Test strip; 3. Test strip identification assembly; 4. Conveyor belt; 5. Reel-up and reel-down assembly; 6. Guide rail; 7. First drive assembly; 8. First limit block; 9. Support frame; 10. Second limit block; 11. Frame; 12. Second drive assembly. DETAILED DESCRIPTION

[0026] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings of the present utility model are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the limiting conditions that can be implemented in the present utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present utility model without affecting the effects that can be produced by the present utility model and the purposes that can be achieved. The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described here.

[0028] In the present application, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the present application may be understood based on the specific circumstances.

[0029] like Figure 1 As shown, in this embodiment, a lithium battery electrolyte leakage detection device is provided, including a frame 11, a test paper 2 and a test paper identification component 3, and also includes a first drive component 7 and a second drive component 12.

[0030] Specifically, the first driving assembly 7 is disposed on the frame 11 along the X direction, the test paper 2 is connected to the first driving assembly 7, and the first driving assembly 7 can drive the test paper 2 to move along the X direction.

[0031] The second driving assembly 12 is disposed on the frame 11 along the Z direction, and the first driving assembly 7 is connected to the second driving assembly 12 . The second driving assembly 12 can drive the first driving assembly 7 and the test paper 2 to move along the Z direction.

[0032] In this embodiment, the first drive assembly 7 and the second drive assembly 12 cooperate with each other to drive the test paper 2 to move between the test paper identification assembly 3 and the battery pack 1. The first drive assembly 7 and the second drive assembly 12 drive the test paper 2 to the battery pack 1 and can contact the battery pack 1 to detect the electrolyte leakage of the battery pack 1. The test paper 2 is a PH test paper. When the electrolyte of the battery pack 1 leaks, the electrolyte is acidic. The test paper 2 is close to the lithium battery injection port and can absorb the leaked electrolyte. The acidic electrolyte appears red on the PH test paper. The first drive assembly 7 and the second drive assembly 12 drive the test paper 2 to the top of the test paper identification assembly 3. The test paper identification assembly 3 in this embodiment is a CCD camera. The CCD camera takes a picture of the color on the PH test paper to determine whether the battery pack 1 is leaking. The lithium battery electrolyte leakage detection device replaces the traditional manual visual inspection, realizes online control, saves labor costs, and improves detection accuracy.

[0033] In this embodiment, the first drive assembly 7 uses a linear motor module to drive the test strip 2 to move along the X direction, and the second drive assembly 12 uses a linear motor module to drive the first drive assembly 7 and the test strip 2 to move together along the Z direction. Of course, in other embodiments, the first drive assembly 7 and the second drive assembly 12 can also use other driving methods, such as servo motors.

[0034] The test paper 2 is driven to move by the dual-axis drive of the first drive component 7 and the second drive component 12. First, the test paper 2 can be moved in multiple directions, which is convenient for setting the lithium battery electrolyte leakage detection device in this embodiment next to the lithium battery detection production line, and the equipment on the original production line can be changed or changed less, which is convenient for the implementation of the lithium battery electrolyte leakage detection device. Secondly, the position of the test paper 2 can be controlled more accurately. When the test paper 2 contacts the battery pack 1, the test paper 2 can be controlled to fully contact the battery pack 1 and fully absorb the leakage; when the test paper 2 is close to the top of the paper identification component 3, the test paper 2 can be controlled to be located in the best shooting position, improving the shooting quality, thereby more accurately judging the color change of the test paper and improving the accuracy of the detection.

[0035] In this embodiment, the test paper 2 extends along the Y direction, and the two ends of the test paper 2 are respectively wound on the reel assembly 5, and the reel assembly 5 includes a reel roller, and the rotation of the reel roller drives the test paper 2 to be reeled and released along the Y direction. The battery pack 1 includes a plurality of battery cells, and the test paper 2 can extend to different lengths according to the number of battery cells in the battery pack 1, so that the test paper 2 can detect the leakage of multiple battery cells at one time.

[0036] Furthermore, the reel assembly 5 is fixed on a connecting plate, and the connecting plate is connected to the first driving assembly 7. A flexible pad is also provided on the connecting plate, and the flexible pad is located on a side close to the test paper 2. When the second driving assembly 12 drives the test paper 2 to move along the Z direction to contact the battery pack 1, the flexible pad can make the test paper 2 fit closely to the battery filling port, effectively avoiding leakage. The flexible pad in this embodiment can be a sponge pad, or a flexible pad formed of other flexible materials.

[0037] The first driving assembly 7 is fixed on the support frame 9, and two second driving assemblies 12 are provided. Both ends of the support frame 9 are respectively connected to the second driving assemblies 12, and the second driving assembly 12 drives the first driving assembly 7 to move through the support frame 9. Two guide rails 6 are connected between the support frame 9 and the connecting plate, and sliders are respectively connected to the guide rails 6. The sliders are all connected to the connecting plate to improve the fixing effect of the connecting plate and prevent the test paper 2 connected to the connecting plate from shaking.

[0038] A first limit block 8 is disposed at one end of the first driving assembly 7, and a second limit block 10 is disposed at one end of the second driving assembly 12. The first limit block 8 and the second limit block 10 both play a limiting role, so that the test paper 2 moves within a set range.

[0039] In another embodiment, a lithium battery detection production line is provided, comprising a conveyor belt 4 and the lithium battery electrolyte leakage detection device in the above embodiment.

[0040] The conveyor belt 4 extends along the Y direction, the battery pack 1 is located on the conveyor belt 4, and the conveyor belt 4 drives the battery pack 1 to be transported along the Y direction. The lithium battery electrolyte leakage detection device is located on one side of the conveyor belt 4, and the first drive component 7 and the second drive component 12 cooperate with each other to drive the test paper 2 to move between the test paper identification component 3 and the battery pack 1.

[0041] After the conveyor belt 4 drives the battery pack 1 to the position to be tested, the first drive assembly 7 drives the test paper 2 to the top of the battery pack 1 along the X direction, and the second drive assembly 12 drives the test paper 2 to descend along the Z direction until it contacts the battery filling port of the battery pack 1. Then, the second drive assembly 12 drives the test paper 2 to rise along the Z direction, and the first drive assembly 7 drives the test paper 2 to the position to be photographed above the test paper identification assembly 3 along the X direction. The test paper identification assembly 3 takes a photo of the test paper, identifies the color change on the test paper, and determines whether the battery pack 1 is leaking. When the color of the test paper changes, the reel roller in the reel assembly 5 rotates to reel in the tested test paper, and releases the untested test paper for the next test, ensuring that the test paper is in a clean and intact state before each test.

[0042] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A lithium battery electrolyte leakage detection device, characterized in that: The invention comprises a frame (11), a test paper (2) and a test paper identification component (3), and further comprises: A first driving component (7) is arranged on the frame (11) along the X direction, the test strip (2) is connected to the first driving component (7), and the first driving component (7) can drive the test strip (2) to move along the X direction; A second driving assembly (12) is arranged on the frame (11) along the Z direction, and the first driving assembly (7) is connected to the second driving assembly (12), and the second driving assembly (12) can drive the first driving assembly (7) and the test paper (2) to move along the Z direction; The first driving component (7) and the second driving component (12) cooperate with each other to drive the test paper (2) to contact the battery pack (1), and drive the test paper (2) to the position to be detected by the test paper identification component (3).

2. The lithium battery electrolyte leakage detection device according to claim 1, characterized in that: The two ends of the test paper (2) are respectively wound on the retractable reel assembly (5), and the test paper (2) extends along the Y direction. The retractable reel assembly (5) drives the test paper (2) to be retracted and released along the Y direction.

3. The lithium battery electrolyte leakage detection device according to claim 2, characterized in that: The reeling and unreeling assembly (5) is fixed on a connecting plate, and the connecting plate is connected to the first driving assembly (7).

4. The lithium battery electrolyte leakage detection device according to claim 3, characterized in that: The first driving assembly (7) is fixed on a support frame (9), and two ends of the support frame (9) are respectively connected to the second driving assembly (12).

5. The lithium battery electrolyte leakage detection device according to claim 4, characterized in that: At least one guide rail (6) is connected between the support frame (9) and the connecting plate.

6. The lithium battery electrolyte leakage detection device according to any one of claims 1 to 5, characterized in that: The first drive assembly (7) and the second drive assembly (12) are linear motor modules.

7. The lithium battery electrolyte leakage detection device according to any one of claims 1 to 5, characterized in that: The test paper identification component (3) is a CCD camera.

8. The lithium battery electrolyte leakage detection device according to claim 6, characterized in that: A first limit block (8) is disposed at one end of the first driving assembly (7), and a second limit block (10) is disposed at one end of the second driving assembly (12).

9. The lithium battery electrolyte leakage detection device according to claim 3, characterized in that: A flexible pad is also provided on the connecting plate, and the flexible pad is located on a side close to the test paper (2).

10. A lithium battery testing production line, characterized by: It comprises a conveyor belt (4) and a lithium battery electrolyte leakage detection device as claimed in any one of claims 1 to 9; The battery pack (1) is located on a conveyor belt (4), and the conveyor belt (4) extends along the Y direction to drive the battery pack (1) to be transported along the Y direction; The lithium battery electrolyte leakage detection device is located on one side of the conveyor belt (4); The first driving component (7) and the second driving component (12) cooperate with each other to drive the test paper (2) to move between the test paper identification component (3) and the battery pack (1).

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