New energy battery cover plate water detection clamp

Abstract

The utility model discloses a new energy battery cover plate water detection clamp which comprises an upper cavity and a lower cavity which are detachably and fixedly connected, a first groove is formed in the lower plane of the upper cavity, second grooves are formed in the left side and the right side of the first groove, and the first groove and the second grooves are used for being connected with a workpiece to be detected in a sleeved mode. A first O-shaped sealing ring and a second O-shaped sealing ring are arranged on the peripheries of the first groove and the second groove respectively, and first vent holes are formed in the positions, corresponding to the first groove and the second groove, of the front side face of the upper cavity and used for introducing compressed air into the first groove and the second groove; according to the utility model, the workpiece to be detected is fixed in the rectangular grooves of the upper cavity and the lower cavity, the first groove and the second groove, compressed air is introduced into the corresponding grooves through the first vent holes, the workpiece is placed in water for detection, whether bubbles emerge or not is observed, and the appearance of the workpiece to be detected is not influenced. And the air leakage position and the air leakage degree can be determined by observing the position, the size and the speed of the air bubbles.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a water inspection fixture for a new energy battery cover. Background Art

[0002] In recent years, driven by the concept of "green and sustainable development", the new energy vehicle market has continued to expand rapidly, driving the rapid growth of the new energy battery market. At present, new energy batteries generally adopt a square aluminum shell structure, which consists of a shell and a battery cover. The battery cover not only provides a confined space for new energy batteries, but also serves as a medium for energy transmission of new energy batteries. Its structure directly affects the reliability and manufacturing cost of the battery pack. The reliability of the battery pack directly affects the working performance of the car and the personal safety of the passengers. Therefore, for the battery structure, especially the battery cover, in addition to some necessary tests, it is also necessary to conduct enhanced destructive tests on samples during the manufacturing process.

[0003] At present, all the tests that must be conducted on the cover of new energy batteries include the electrical performance test of the pole and the cover and the air tightness test of the cover structure. Both tests will not cause damage to the structure and performance of the cover. In addition, many destructive verifications are required during the FAE stage and product manufacturing stage, such as salt spray test, tensile test, baking test, creep test, water test, etc. The purpose of water test is to see whether the cover structure is reliable under higher pressure, but the existing water test is to weld the cover to the aluminum shell, pass compressed air and put the whole into water to observe whether there is leakage. The process is cumbersome and inconvenient to operate, and multiple devices need to be used in coordination to complete the test, which greatly consumes manpower and material resources and increases the production and R&D costs of enterprises. Utility Model Content

[0004] In order to solve the problem that the above-mentioned existing battery cover water inspection needs to weld the cover to the aluminum shell, which is a cumbersome process and inconvenient to operate, and also requires the coordination of multiple devices, the utility model provides a new energy battery cover water inspection fixture, which fixes the workpiece to be tested in the rectangular groove and the first and second grooves after the upper and lower cavities are combined, and connects the first air vent to the external quick air joint with compressed air by setting a first air vent, puts it into water for testing, and observes whether there are bubbles at the lower ends of the first and second through grooves. The presence of bubbles indicates that the air tightness of the workpiece to be tested is unqualified, and the absence of bubbles indicates that the air tightness of the workpiece to be tested is qualified. The water inspection fixture has a simple structure and is easy to operate. The leakage position and degree can also be accurately determined by observing the position, size and rate of the bubbles.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a new energy battery cover water inspection fixture, characterized in that: it comprises an upper cavity and a lower cavity which are detachably fixedly connected, a first groove is arranged in the middle of the lower plane of the upper cavity, and second grooves are arranged on the left and right sides of the first groove, and the shapes of the first groove and the second groove are respectively consistent with the shapes of the corresponding positions of the workpiece to be waited for, and are used for sleeve connection with the corresponding positions of the workpiece to be waited for, and a first annular groove consistent with the shape of the first groove is arranged on the lower plane of the upper cavity at the periphery of the first groove, and a second annular groove consistent with the shape of the second groove is arranged at the periphery of the second groove Groove, a first O-type sealing ring is arranged in the first annular groove, a second O-type sealing ring is arranged in the second annular groove, first vent holes are arranged on the front side surface of the upper cavity at positions corresponding to the first groove and the second groove, the outer end of the first vent hole is an internal thread hole, and the internal thread hole cooperates with the quick air vent joint, a second vent hole connected to the first vent hole is arranged on the bottom surface of the first groove, and a third vent hole connected to the first vent hole is arranged on the bottom surface of the second groove, and the first vent hole is used to connect with external compressed air, and compressed air is introduced into the first groove and the second groove;

[0006] A rectangular groove is provided in the middle of the upper plane of the lower cavity, which is used to be socketed with the outer shape of the workpiece to be measured. A first through groove and a second through groove are respectively provided on the bottom surface of the rectangular groove at positions corresponding to the first groove and the second groove. A third annular groove consistent with the outer shape of the rectangular groove is provided on the upper plane of the lower cavity at the periphery of the rectangular groove. A third O-ring is provided in the third annular groove. A circular blind hole is provided on the bottom surface of the rectangular groove at a position corresponding to the circular boss on the lower bottom surface of the workpiece to be measured, which is used to cooperate with the circular boss.

[0007] Furthermore, arc-shaped grooves are provided outside the four corners of the rectangular groove to prevent the four corners of the rectangular groove from damaging the workpiece to be measured and to facilitate the milling of the rectangular groove.

[0008] Furthermore, two rectangular opening grooves are symmetrically provided on the front and rear side walls of the rectangular groove, which is convenient for taking and placing the workpiece to be tested by hand, thereby improving the efficiency of water inspection.

[0009] Furthermore, the inner diameter of the first through groove is larger than the maximum outer diameter of the lower end cover plate at the corresponding position of the workpiece to be processed.

[0010] Furthermore, the inner diameter of the second through groove is larger than the maximum outer diameter of the insulating seal at the lower end of the corresponding position of the workpiece to be removed.

[0011] Furthermore, the front right sides of the upper cavity and the lower cavity are both provided with the same chamfer for identifying the installation direction.

[0012] Furthermore, the upper plane of the upper cavity is provided with 8 bolt mounting holes evenly distributed in an array, and the upper plane of the lower cavity is provided with threaded holes at positions corresponding to the bolt mounting holes. The upper cavity and the lower cavity are respectively connected by 8 clamping bolts passing through the corresponding bolt mounting holes and being threaded and clamped with the corresponding threaded holes.

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

[0014] 1. The utility model has a strong structural reliability, does not require the coordination of multiple devices, and can intuitively and clearly observe the location and intensity of the leak.

[0015] 2. The utility model does not need to weld the battery cover to be tested on the aluminum shell. It only needs to put the battery cover to be tested into the rectangular groove and the circular blind hole, and the upper parts of the cover are correspondingly inserted into the first and second grooves, and then the compressed air and water are connected. The operation is simple, convenient and fast, and the detection efficiency is high.

[0016] 3. Compared with the commonly used helium detection technology, helium detection has higher accuracy, but the test pressure is only about 0.2MPa, and it is impossible to observe which specific part has a leak, so it is difficult to determine the problem point. The water detection of the utility model can increase the air pressure to a maximum of 1.2MPa through a booster for testing, and the leaking part can be seen intuitively, which is convenient for finding the problem point and making improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the middle cross-sectional structure of an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the upper cavity of an embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the middle cross-sectional structure of the upper cavity of an embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the cavity structure of the embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of the middle cross-sectional structure of the lower cavity of an embodiment of the utility model.

[0024] In the figure: 1, lower cavity, 101, rectangular groove, 102, first through groove, 103, circular blind hole, 104, second through groove, 105, third annular groove, 106, rectangular open groove, 107, arc groove, 108, threaded hole, 2, upper cavity, 201, first groove, 202, second groove, 203, first vent hole, 204, second vent hole, 205, third vent hole, 206, first annular groove, 207, second annular groove, 208, bolt mounting hole, 3, clamping bolt, 4, first O-ring, 5, second O-ring, 6, third O-ring, 7, workpiece to be measured, 701, circular boss, 702, cover plate, 703, insulating seal. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention.

[0027] like Figures 1 to 7As shown, the embodiment of the utility model includes an upper cavity 2 and a lower cavity 1 that are detachably fixedly connected, a first groove 201 is provided in the middle of the lower plane of the upper cavity 2, and second grooves 202 are provided on the left and right sides of the first groove 201. The shapes of the first groove 201 and the second groove 202 are respectively consistent with the shapes of the corresponding positions of the workpiece 7 to be waited for, and are used to be sleeved with the corresponding positions of the workpiece 7 to be waited for, and a first annular groove 206 consistent with the shape of the first groove 201 is provided on the lower plane of the upper cavity 2 at the periphery of the first groove 201, and a second annular groove 207 consistent with the shape of the second groove 202 is provided at the periphery of the second groove 202, and a A first O-ring 4 is provided, and a second O-ring 5 is provided in the second annular groove 207. A first vent hole 203 is provided on the front side surface of the upper cavity 2 at positions corresponding to the first groove 201 and the second groove 202. The outer end of the first vent hole 203 is an internal threaded hole, which cooperates with a quick air vent joint. A second vent hole 204 communicating with the first vent hole 203 is provided on the bottom surface of the first groove 201. A third vent hole 205 communicating with the first vent hole 203 is provided on the bottom surface of the second groove 202. The first vent hole 203 is used to connect with external compressed air, and compressed air is introduced into the first groove 201 and the second groove 202 respectively.

[0028] A rectangular groove 101 is provided in the middle of the upper plane of the lower cavity 1, which is used to be socketed with the outer shape of the workpiece 7 to be measured. A first through groove 102 and a second through groove 104 are respectively provided on the bottom surface of the rectangular groove 101 at positions corresponding to the first groove 201 and the second groove 202. A third annular groove 105 consistent with the outer shape of the rectangular groove 101 is provided on the upper plane of the lower cavity 1 at the periphery of the rectangular groove 101, and a third O-ring 6 is provided in the third annular groove 105. A circular blind hole 103 is provided on the bottom surface of the rectangular groove 101 at a position corresponding to the circular boss 701 on the lower bottom surface of the workpiece 7 to be measured, which is used to cooperate with the circular boss 701.

[0029] Furthermore, arc-shaped grooves 107 are provided outside the four corners of the rectangular groove 101 to prevent the four corners of the rectangular groove 101 from damaging the workpiece 7 to be measured, and also to facilitate the milling process of the rectangular groove 101 .

[0030] Furthermore, two rectangular opening grooves 106 are symmetrically provided on the front and rear side walls of the rectangular groove 101, so as to facilitate the hand placement of the workpiece 7 to be tested, thereby improving the water inspection efficiency of the battery cover.

[0031] Furthermore, the inner diameter of the first through groove 102 is larger than the maximum outer diameter of the lower end cover plate 702 at the corresponding position of the workpiece 7 to be processed.

[0032] Furthermore, the inner diameter of the second through groove 104 is larger than the maximum outer diameter of the insulating seal 703 at the lower end of the corresponding position of the workpiece 7 to be processed.

[0033] Furthermore, the upper cavity 2 and the lower cavity 1 are both provided with the same chamfer on the front right side for identifying the installation direction. Figure 1 As shown, although the other three corners are also chamfered, the chamfer on the front right side is larger, which facilitates quick identification of the installation direction when the upper cavity 2 and the lower cavity 1 are combined, thereby improving detection efficiency.

[0034] Furthermore, eight bolt mounting holes 208 evenly distributed in an array are provided on the upper plane of the upper cavity 2, and threaded holes 108 are provided on the upper plane of the lower cavity 1 at positions corresponding to the bolt mounting holes 208. The upper cavity 2 and the lower cavity 1 are fixedly connected by threaded compression with the corresponding threaded holes 108 through eight clamping bolts 3 that pass through the corresponding bolt mounting holes 208 respectively.

[0035] The function of the clamping screw 203 is to clamp and fix the workpiece 7 to be measured, the upper cavity 2 and the lower cavity 1, thereby reducing the use of machinery and equipment, facilitating operation, and facilitating the placement and taking of the workpiece 7 to be measured.

[0036] The working principle of the embodiment of the utility model is as follows: loosen the clamping bolt 3, disassemble the upper cavity 2, and place the workpiece 7 to be measured into the rectangular groove 101 of the lower cavity 1; based on the chamfer consistency of the upper cavity 2 and the lower cavity 1, cover the upper cavity 2 on the lower cavity 1, so that the middle components of the workpiece 7 to be measured are respectively clamped in the corresponding first groove 201 and second groove 202; use the clamping bolt 3 to thread-tighten and seal the upper cavity 2 and the lower cavity 1; then seal and fix the three quick air-pass connectors connected with the compressed air with the internal threaded holes at the outer ends of the three first air holes 203; after the connection is completed, put it into the water tank; and pass the compressed air into the first groove 201 and the second groove 202 respectively; when the workpiece 7 to be measured leaks, the compressed air will pass through the workpiece and be discharged from the water through the first through groove 102 or the second through groove 103; when bubbles are observed in the water, it can be confirmed that the workpiece is leaking; otherwise, there is no problem with the air tightness of the workpiece.

[0037] The utility model has strong structural reliability, does not require the coordination of multiple devices, does not need to weld the battery cover to be tested on the aluminum shell, is simple to operate, convenient and fast, and has high detection efficiency. When the workpiece leaks, the leak position and degree can be accurately determined by observing the bubble position, size and rate, which is convenient for finding problem points and making improvements.

[0038] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A new energy battery cover water inspection fixture, characterized by: The cover is an upper part of the second embodiment of the present invention, and the cover has two sides, each of which is connected to the other end of the first groove and the other end of the second groove, and the cover has two sides, each of which is connected to the other end of the second groove and the other end of the second groove. The cover has two sides, each of which is connected to the other end of the second groove and the other end of the second groove. The cover has two sides, each of which is connected to the other end of the second groove and the other end of the second groove. A rectangular groove is provided in the middle of the upper plane of the lower cavity, which is used to be socketed with the outer shape of the workpiece to be measured. A first through groove and a second through groove are respectively provided on the bottom surface of the rectangular groove at positions corresponding to the first groove and the second groove. A third annular groove consistent with the outer shape of the rectangular groove is provided on the upper plane of the lower cavity at the periphery of the rectangular groove. A third O-ring is provided in the third annular groove. A circular blind hole is provided on the bottom surface of the rectangular groove at a position corresponding to the circular boss on the lower bottom surface of the workpiece to be measured, which is used to cooperate with the circular boss.

2. A new energy battery cover water inspection fixture according to claim 1, characterized in that: Arc-shaped grooves are arranged outside the four corners of the rectangular groove to prevent the four corners of the rectangular groove from damaging the workpiece to be measured.

3. A new energy battery cover water inspection fixture according to claim 1, characterized in that: Two rectangular opening grooves are symmetrically arranged on the front and rear side walls of the rectangular groove, so as to facilitate the hand placement of the workpiece to be measured.

4. A new energy battery cover water inspection fixture according to claim 1, characterized in that: The inner diameter of the first through groove is larger than the maximum outer diameter of the lower end cover plate at the corresponding position of the workpiece to be processed.

5. The new energy battery cover water inspection fixture according to claim 1 is characterized by: The inner diameter of the second through groove is larger than the maximum outer diameter of the insulating seal at the lower end of the corresponding position of the workpiece to be processed.

6. A new energy battery cover water inspection fixture according to claim 1, characterized in that: The upper cavity and the lower cavity are both provided with the same chamfer on the front right side for identifying the installation direction.

7. A new energy battery cover water inspection fixture according to claim 1, characterized in that: The upper plane of the upper cavity is provided with 8 bolt mounting holes evenly distributed in an array, and the upper plane of the lower cavity is provided with threaded holes at positions corresponding to the bolt mounting holes. The upper cavity and the lower cavity are respectively connected with the corresponding threaded holes by 8 clamping bolts passing through the corresponding bolt mounting holes and being threaded and clamped.

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