Battery welded junction water pressure leakage detection tool

Abstract

The utility model discloses a battery welded junction water pressure leakage detection tool comprising a two-large-surface floating positioning mechanism which is used for positioning two large surfaces of a battery and moves outwards by a preset amplitude along with expansion deformation of the two large surfaces of the battery in a test process. According to the tool, the battery can simulate the battery bulging process, and the actual situation of the battery in the using process can be simulated, so that the test data is closer to the actual situation, and the data is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing auxiliary equipment, and particularly relates to a water pressure leak detection tooling for battery welding seams. Background Art

[0002] In recent years, as a green new energy source, lithium-ion batteries have been widely used in the power industry, consumer electronics industry, etc. Cost control in the battery manufacturing process has become the key to the development and competition of the industry.

[0003] During the battery manufacturing process, laser peripheral welding needs to be performed on the battery. After welding, the welding effect needs to be inspected. Currently, the method for inspecting the welding effect is to clamp and test in a four-sided fixed manner. This testing method cannot well simulate the state when the battery bulges, resulting in certain errors in the measured values. The welding effect of the battery peripheral weld is a very important parameter for the battery, and inaccurate measurement results will directly affect the battery quality.

[0004] In view of the above, there is an urgent need to develop a testing tooling currently to test the manufactured batteries, so as to improve the accuracy of battery testing and further improve the battery quality. Summary of the Utility Model

[0005] Aiming at the technical problem that the current method for inspecting the welding effect pointed out in the above background art cannot well simulate the state when the battery bulges and there will be certain errors in the measured values, the purpose of the utility model is to provide a water pressure leak detection tooling for battery welding seams to improve the accuracy of battery testing and further improve the battery quality.

[0006] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0007] A water pressure leak detection tooling for battery welding seams includes two large-surface floating positioning mechanisms for positioning two large surfaces of the battery and capable of moving outward by a preset amplitude along with the expansion and deformation of the two large surfaces of the battery during the test.

[0008] Further, the two large-surface floating positioning mechanisms include a left large-surface floating positioning unit and a right large-surface floating positioning unit which are symmetric in structure and are respectively arranged on the outer sides of the two large surfaces of the battery. The right large-surface floating positioning unit includes a large-surface floating positioning plate, and the large-surface floating positioning plate is connected to the large-surface positioning plate of the leak detection tooling battery positioning frame through an elastic component.

[0009] Further, the elastic component includes a third stroke guide post and a spring. The inner end of the third stroke guide post is fixedly connected to the large-surface floating positioning plate, a spring is sleeved on it, the outer end passes through the large-surface positioning plate and is slidably connected, and the end is threadedly connected to a nut.

[0010] Furthermore, the large surface floating positioning plate is slidably connected to the large surface positioning plate through a guiding component.

[0011] Furthermore, the guiding component includes a first stroke guide post and a linear bearing. The linear bearing is fixedly installed on the large surface positioning plate. The inner end of the first stroke guide post is fixedly connected to the large surface floating positioning plate, the outer end passes through the linear bearing and is slidably connected, and the end is threadedly connected to a nut.

[0012] Furthermore, the leak detection tooling battery positioning frame includes a tooling bottom plate, two large surface positioning plates installed on the left and right sides of the upper end of the tooling bottom plate, a front side end surface pressing mechanism connecting plate installed on the front side of the upper end of the tooling bottom plate, and a water pressure pump connecting plate installed on the rear side of the upper end of the tooling bottom plate. The two large surface positioning plates, the front side end surface pressing mechanism connecting plate, and the water pressure pump connecting plate enclose a square frame structure. Among them, a water injection hole for injecting water into the battery to be tested is provided on the water pressure pump connecting plate, and a side end surface pressing mechanism for pressing the side end of the battery is installed on the front side end surface pressing mechanism connecting plate.

[0013] Furthermore, the side end surface pressing mechanism includes a side top plate and a top plate driving mechanism. The side top plate can be driven to move through the top plate driving mechanism. Among them, the side top plate, the two large surface positioning plates, and the front side end surface pressing mechanism connecting plate enclose a structure for positioning the four sides of the battery to be tested.

[0014] Furthermore, the driving mechanism includes a second stroke guide post for guiding and a transmission lead screw. The second stroke guide post and the transmission lead screw both pass through the front side end surface pressing mechanism connecting plate and are respectively slidably connected and threadedly connected. The inner end of the transmission lead screw is rotatably connected to the side top plate, and the inner end of the second stroke guide post is fixedly connected to the side top plate. The side top plate is driven to move by rotating the transmission lead screw.

[0015] Furthermore, a handle is connected to the outer end of the transmission lead screw.

[0016] Furthermore, a sealing rubber ring is provided at the inner end of the water injection hole.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] During the detection of the prior art, the four-sided positioning is all fixed positioning, and the tearing force at the weld position after the battery bulges cannot be simulated. The tooling of the present application can make the battery simulate the battery bulging process, can simulate the actual situation during the battery use process, so that the test data is closer to the actual situation and the data is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the tooling provided by the embodiment of the present application;

[0020] Figure 2 Schematic diagram of the tooling explosion structure provided by the embodiment of the present application;

[0021] In the figure, the first stroke guide post 1, spring 2, linear bearing 3, nut 4, side top plate 5, second stroke guide post 6, transmission lead screw 7, transmission locking head 8, handle 9, large surface positioning plate 10, front side end face pressing mechanism connecting plate 11, water pressure pump connecting plate 12, sealing rubber ring 13, tooling bottom plate 14, large surface floating positioning plate 15, third stroke guide post 17;

[0022] Figure 3 Schematic diagram of the structure of the side end face pressing mechanism provided by the embodiment of the present application;

[0023] Figure 4 Schematic diagram of the structure of the leak detection tooling battery positioning bracket provided by the embodiment of the present application;

[0024] Figure 5 Schematic diagram of the structure of the right large surface floating positioning unit provided by the embodiment of the present application;

[0025] Figure 6 Schematic diagram of the initial working state of the battery to be tested provided by the embodiment of the present application;

[0026] In the figure, the battery to be tested 16;

[0027] Figure 7 Schematic diagram of the expanded working state of the battery to be tested provided by the embodiment of the present application. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation to the present utility model.

[0030] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0031] As Figures 1-7 shown, it is the structural diagram of the embodiment provided by the present utility model.

[0032] Embodiment 1

[0033] This embodiment provides a water pressure leak detection tooling for battery welding joints, including two large - surface floating positioning mechanisms used for positioning the two large surfaces of the battery and having a preset outward movement amplitude during the test as the two large surfaces of the battery expand and deform.

[0034] It should be noted that in this application, the four - surface positioning method is used to fix the battery to be tested. Among them, the two large - surface floating positioning mechanisms position the two large surfaces of the battery to be tested. After the positioning is completed, during the water pressure detection of the battery interior, the two large surfaces of the battery to be tested will deform and expand due to the increase in internal pressure, thereby squeezing the two large - surface floating positioning mechanisms. After being squeezed to a certain extent, that is, after the preset amplitude, the two large - surface floating positioning mechanisms contact the large - surface positioning plate fixedly arranged on the battery positioning frame of the leak detection tooling, binding the battery to be tested, making the force act completely on the welding joint, enabling the battery to simulate the battery bulging process, and can simulate the actual situation during the battery use process, effectively testing the welding strength of the battery welding position.

[0035] Embodiment 2

[0036] Based on Embodiment 1, this embodiment provides a specific structure of the two large - surface floating positioning mechanism, which includes a left large - surface floating positioning unit and a right large - surface floating positioning unit that are symmetrically structured and respectively arranged on the outer sides of the two large surfaces of the battery. The right large - surface floating positioning unit includes a large - surface floating positioning plate 15, and the large - surface floating positioning plate 15 is connected to the large - surface positioning plate 10 of the battery positioning frame of the leak detection tooling through an elastic component.

[0037] It should be noted that the large - surface floating positioning plate 15 is a positioning plate with a variable position, which directly contacts the large surface of the battery to be tested. During the water pressure detection of the battery interior, the two large surfaces of the battery to be tested will deform and expand due to the increase in internal pressure, thereby squeezing the large - surface floating positioning plate 15 to move outward.

[0038] Embodiment 3

[0039] This embodiment is an improvement based on Embodiment 2. This embodiment proposes a specific structure of an elastic component. The elastic component includes a third stroke guide post 17 and a spring 2. One end of the inner side of the third stroke guide post 17 is fixedly connected to the large surface floating positioning plate 15, on which the spring 2 is sleeved. The outer end passes through the large surface positioning plate 10 and is slidably connected, and the end is threadedly connected to the nut 4.

[0040] It should be noted that when the large surface floating positioning plate 15 moves outward as the battery under test expands, it compresses the spring 2 until the large surface floating positioning plate 15 can no longer move.

[0041] Embodiment 4

[0042] This embodiment is an improvement based on the above embodiments. This embodiment provides a structure in which the large surface floating positioning plate 15 is slidably connected to the large surface positioning plate 10 through a guiding component. Through the guiding component, the movement of the large surface floating positioning plate 15 is more accurate.

[0043] Embodiment 5

[0044] This embodiment provides a specific structure of a guiding component. The specific structure of the guiding component can be as follows: including a first stroke guide post 1 and a linear bearing 3. The linear bearing 3 is fixedly installed on the large surface positioning plate. One end of the inner side of the first stroke guide post 1 is fixedly connected to the large surface floating positioning plate 15, and the outer end passes through the linear bearing 3 and is slidably connected, and the end is threadedly connected to the nut 4.

[0045] Among them, the linear bearing 3 is fixedly connected to the large surface positioning plate 10 by screws, and the nut is locked and connected to the external thread port on the stroke guide post.

[0046] It should be noted that when the large surface floating positioning plate 15 moves as the battery under test expands, the first stroke guide post 1 moves within the linear bearing 3.

[0047] Among them, the structure of the leak detection tooling battery positioning frame can be as follows: including a tooling bottom plate 14, two large surface positioning plates 10 installed on the upper left and right sides of the tooling bottom plate 4, a front side end surface pressing mechanism connecting plate 11 installed on the front side of the upper end of the tooling bottom plate 4, and a water pressure pump connecting plate 12 installed on the rear side of the upper end of the tooling bottom plate 4. The two large surface positioning plates 10, the front side end surface pressing mechanism connecting plate 11, and the water pressure pump connecting plate 12 enclose a square frame structure. Among them, a water injection hole for injecting water into the battery under test is provided on the water pressure pump connecting plate 12, and a side end surface pressing mechanism for pressing the side end of the battery is installed on the front side end surface pressing mechanism connecting plate 11.

[0048] Among them, a water pressure pump is connected to the outside of the water injection hole, and a sealing rubber ring 13 is arranged at the inner end of the water injection hole for connecting the water injection port on the battery to be tested, so as to improve the sealing performance. Water injection is carried out by using the water pressure pump.

[0049] Among them, the sealing rubber ring 13 can be adhesively bonded to the water pressure pump connecting plate with glue.

[0050] Among them, the side end surface pressing mechanism can adopt the following structure: it includes a side top plate 5 and a top plate driving mechanism. The side top plate can be driven to move through the top plate driving mechanism. Among them, the side top plate 5, two large surface positioning plates 10 and the front side end surface pressing mechanism connecting plate 11 enclose a structure for positioning the four sides of the battery to be tested.

[0051] Among them, the two large surface positioning plates 10, the front side end surface pressing mechanism connecting plate 11 and the water pressure pump connecting plate 12 can be fastened by screws, and the four plates and the tooling bottom plate are fastened by screws.

[0052] Among them, the driving mechanism can adopt the following structure: it includes a second stroke guide post 6 for guiding and a transmission lead screw 7. The second stroke guide post 6 and the transmission lead screw 7 both pass through the front side end surface pressing mechanism connecting plate 11 and are respectively slidably connected and threadedly connected. The inner end of the transmission lead screw 7 is rotatably connected to the side top plate 5, and the inner end of the second stroke guide post 6 is fixedly connected to the side top plate 5. The side top plate 5 is driven to move by rotating the transmission lead screw 7.

[0053] Among them, a handle 9 is connected to the outer end of the transmission lead screw 7, and the handle 9 and the transmission lead screw 7 can be locked and connected by a setscrew, which improves the operation convenience.

[0054] Working principle: Place the battery to be tested with holes drilled between the two large surface floating positioning plates 15, with the side with the water injection port facing the water injection hole of the water pressure pump connecting plate, align the water injection port with the sealing rubber ring, and then rotate the handle, so that the rotating lead screw rotates, thereby driving the side top plate to press the battery to be tested. Under the non-water pressure state, the two large surface floating positioning plates 15 are kept in the initial position in contact with the large surface of the battery by the action of the spring. Then, use the water pressure pump (a manual water pressure pump can be used) to fill water into the battery. During this process, the battery to be tested is deformed by the water pressure pressing force on the outer shell, the large surface bulges and deforms, pushing open the two large surface floating positioning plates. When the two large surface floating positioning plates reach the maximum stroke at a certain position, the force completely acts on the weld, and a force is applied to the large surface of the battery. Then, by continuously increasing the water pressure, the welded joint is torn, and the welding tensile force is tested, effectively testing the welding strength at the welding position of the battery.

[0055] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic leak detection tooling for battery welding joints, characterized in that, It includes two large - surface floating positioning mechanisms for positioning the two large surfaces of the battery and capable of moving outward by a preset amplitude along with the expansion and deformation of the two large surfaces of the battery during the test; The two large - surface floating positioning mechanisms include a left large - surface floating positioning unit and a right large - surface floating positioning unit which are symmetric in structure and are respectively arranged outside the two large surfaces of the battery. The right large - surface floating positioning unit includes a large - surface floating positioning plate (15), and the large - surface floating positioning plate (15) is connected to the large - surface positioning plate (10) of the leak - detection tooling battery positioning frame through an elastic component.

2. The hydraulic leak detection tooling for battery welding seams according to claim 1, wherein The elastic component includes a third - stroke guide post (17) and a spring (2). The inner end of the third - stroke guide post (17) is fixedly connected to the large - surface floating positioning plate (15), on which the spring (2) is sleeved. The outer end passes through the large - surface positioning plate (10) and is slidably connected, and the end is threadedly connected to a nut (4).

3. The water pressure leak detection tooling for battery welding joints according to claim 1, characterized in that, The large - surface floating positioning plate (15) is slidably connected to the large - surface positioning plate (10) through a guiding component.

4. A hydraulic leak detection tooling for battery welding joints according to claim 3, characterized in that, The guiding component includes a first - stroke guide post (1) and a linear bearing (3). The linear bearing (3) is fixedly installed on the large - surface positioning plate. The inner end of the first - stroke guide post (1) is fixedly connected to the large - surface floating positioning plate (15), the outer end passes through the linear bearing (3) and is slidably connected, and the end is threadedly connected to a nut (4).

5. A hydraulic leak detection tooling for battery welding joints, characterized in that, The leak - detection tooling battery positioning frame includes a tooling bottom plate (14), two large - surface positioning plates (10) installed on the upper left and right sides of the tooling bottom plate (14), a front - side end - face pressing mechanism connecting plate (11) installed on the upper front side of the tooling bottom plate (14), and a water - pressure pump connecting plate (12) installed on the upper rear side of the tooling bottom plate (14). The two large - surface positioning plates (10), the front - side end - face pressing mechanism connecting plate (11), and the water - pressure pump connecting plate (12) enclose a square - frame structure. Among them, a water - injection hole for injecting water into the battery to be tested is arranged on the water - pressure pump connecting plate (12), and a side - end - face pressing mechanism for pressing the side end of the battery is installed on the front - side end - face pressing mechanism connecting plate (11).

6. A hydraulic leak detection tool for battery welding joints according to claim 5, characterized in that, The side - end - face pressing mechanism includes a side - surface top plate (5) and a top - plate driving mechanism. The side - surface top plate can be driven to move through the top - plate driving mechanism. Among them, the side - surface top plate (5), the two large - surface positioning plates (10), and the front - side end - face pressing mechanism connecting plate (11) enclose a structure for positioning the four sides of the battery to be tested.

7. A hydraulic leak detection tooling for battery welding joints according to claim 6, characterized in that, The driving mechanism includes a second - stroke guide post (6) for guiding and a transmission lead screw (7). The second - stroke guide post (6) and the transmission lead screw (7) both pass through the front - side end - face pressing mechanism connecting plate (11) and are respectively slidably connected and threadedly connected. The inner end of the transmission lead screw (7) is rotatably connected to the side - surface top plate (5), and the inner end of the second - stroke guide post (6) is fixedly connected to the side - surface top plate (5). By rotating the transmission lead screw (7), the side - surface top plate (5) is driven to move.

8. A hydraulic leak detection tooling for battery welding joints, characterized in that, The outer end of the transmission lead screw (7) is connected to a handle (9).

9. The hydraulic leak detection tooling for battery welding seam according to claim 5, wherein A sealing rubber ring (13) is arranged at the inner end of the water - injection hole.

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