Immersion test device

Abstract

The utility model relates to the technical field of test equipment, and discloses a water immersion test device which comprises a water sinking tank, a bracket and a plurality of traction mechanisms, the traction mechanisms are symmetrically distributed outside an inner cavity of the water sinking tank, and the movable ends of the traction mechanisms are connected with the bracket. And the bracket is driven by the traction mechanism to move downwards to reach the required immersion depth. According to the utility model, the winding machine drives the cable to wind, so that the other end of the cable drives the bracket to move downwards, thereby driving the bracket and the battery system thereon to be gradually immersed below the liquid level of the water sinking tank and move to the required immersion depth for testing, the whole structure is simple, the operation is convenient, no additional balance weight is needed, and the cost is low. The problem that the battery system is low in density and cannot sink by self weight is solved, and the method is suitable for battery systems with different appearances and mass distributions.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a water immersion testing device. Background Art

[0002] The power battery system must undergo a waterproof test of at least IPX7 during the design and development process. This test item is also a mandatory inspection item specified in the national standard GB-38031. However, the following problems exist in the actual testing process:

[0003] 1. If the density of the battery system is low or a box is used for bottom immersion test, the sample may be suspended in the water and fail to reach the required immersion depth;

[0004] 2. The internal mass distribution of the battery system is uneven. After being submerged in water, the sample may tilt up, causing the sample to be unable to maintain the installed and used form underwater, and the tilted part of the sample cannot reach the required immersion depth;

[0005] In order to solve the above problems, the following two methods are generally used:

[0006] 1. External counterweight: Use a counterweight block to fix the sample outside to increase the overall density and achieve submersion. However, for samples of different densities and shapes, it is difficult to fix the counterweight block to the sample, and the counterweight block is prone to shifting during the submersion process. The position where the counterweight block is fixed to the sample is difficult to ensure the overall balance, which leads to the sample tilting underwater. The pressure exerted by the counterweight block on the sample surface may cause the sample to deform and affect the test results.

[0007] 2. Internal weights require special tooling to be made and installed inside the sample before the submersion test. Special weight tooling is required for different samples. The tooling cost and sample preparation time are long, and it is generally not universal. This method can generally only be used for box testing, and battery system testing cannot be implemented. Utility Model Content

[0008] In order to solve the technical problems existing in the background technology, the utility model provides a water immersion testing device.

[0009] The utility model proposes an immersion test device, which comprises a sinking tank, a bracket and a traction mechanism. The traction mechanism is multiple and symmetrically distributed outside the inner cavity of the sinking tank. The movable end of the traction mechanism is connected to the bracket, and the bracket is driven to move downward by the traction mechanism to achieve the required immersion depth.

[0010] As a further optimized solution of the utility model, the traction mechanism includes a winder, a cable and a pulley set. The winder is installed on the upper end surface of the submersion tank. One end of the cable is wound on the winding end of the winder, and the other end of the cable extends to the bottom of the inner cavity of the submersion tank through the pulley set and extends upward and is connected to the bracket.

[0011] As a further optimized solution of the utility model, the pulley group includes a first pulley and a second pulley. The first pulley is installed on the opening edge of the submersible tank through a bracket, and the second pulley is installed on the bottom of the inner cavity of the submersible tank through a bracket. The end of the cable away from the winder passes through the first pulley and the second pulley in sequence and extends upward and is connected to the edge of the bracket.

[0012] As a further optimized solution of the utility model, the pulley block also includes a third pulley, which is installed at the bottom of the inner cavity of the subsidence tank through a bracket and is distributed parallel to the second pulley. The third pulley is arranged directly below the edge of the bracket, and the end of the cable away from the winder passes through the first pulley, the second pulley, and the third pulley in sequence and extends vertically upward and is connected to the bottom edge of the bracket.

[0013] As a further optimized solution of the utility model, a lifting ring is installed on the bottom edge of the bracket, the number of the lifting rings is consistent with the number of the traction mechanisms and corresponds one to one, and one end of the cable away from the winder is connected to the lifting ring.

[0014] As a further optimized solution of the utility model, a support beam is installed at the bottom of the bracket, and the number of the support beams is multiple and evenly distributed along the length direction of the bracket.

[0015] As a further optimized solution of the utility model, the inner cavity cross-section of the submersion tank is a rectangular surface, the number of traction mechanisms is four, and the four traction mechanisms are symmetrically distributed at the four corners of the upper end surface of the submersion tank.

[0016] As a further optimized solution of the utility model, the bracket is provided with evenly distributed through holes, and the sample to be tested passes through the through holes and is fixed on the bracket by fasteners.

[0017] The immersion test device proposed by the utility model has the following beneficial effects:

[0018] (i) The cable is reeled up by a reeling machine, so that the other end of the cable drives the bracket to move downward, thereby driving the bracket and the battery system thereon to gradually immerse below the liquid surface of the sinking tank, and move to the required immersion depth for testing. The overall structure is simple and easy to operate, and no additional counterweight is required. This solves the problem that the battery system has a low density and cannot sink by its own weight, and is suitable for battery systems with different shapes and mass distributions;

[0019] (ii) Through the one-to-one correspondence between the four traction mechanisms and the four lifting rings, the four corners of the bracket are evenly stressed and move downward smoothly, ensuring the overall balance of the bracket and the battery system thereon, avoiding the battery system from tilting up underwater and affecting the actual test, which is conducive to improving the accuracy of the actual test results.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional structural schematic diagram of the sinking tank of the utility model;

[0022] Figure 2 It is a side sectional structural schematic diagram of the sinking tank of the utility model;

[0023] Figure 3 It is a top view of the sinking tank of the utility model.

[0024] Description of the drawings: 1. Submersible tank; 2. Bracket; 3. Winder; 4. Lifting ring; 5. Cable; 6. First pulley; 7. Second pulley; 8. Third pulley; 9. Support beam. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] See also Figure 1-Figure 3 , an immersion test device, comprising a sink 1, a bracket 2 and a traction mechanism, wherein the traction mechanism is multiple and symmetrically distributed outside the inner cavity of the sink 1, the movable end of the traction mechanism is connected to the bracket 2, and the bracket 2 is driven to move downward by the traction mechanism to achieve the required immersion depth;

[0031] The inner cavity cross section of the sinking tank 1 is a rectangular surface, and the number of traction mechanisms is four, and the four traction mechanisms are symmetrically distributed at the four corners of the upper end surface of the sinking tank 1, so as to stably pull the bracket 2 at the four corners;

[0032] Specifically, the traction mechanism includes a winder 3, a cable 5 and a pulley block. The winder 3 is installed on the upper end surface of the sinking tank 1. One end of the cable 5 is wound on the winding end of the winder 3. The other end of the cable 5 extends to the bottom of the inner cavity of the sinking tank 1 through the pulley block and extends upward and is connected to the bracket 2.

[0033] Further, the pulley block includes a first pulley 6 and a second pulley 7, the first pulley 6 is installed on the opening edge of the sinking tank 1 through a bracket, and the second pulley 7 is installed on the bottom of the inner cavity of the sinking tank 1 through a bracket, and the end of the cable 5 away from the winder 3 passes through the first pulley 6 and the second pulley 7 in sequence and extends upward and is connected to the edge of the bracket 2;

[0034] Furthermore, the pulley block also includes a third pulley 8, which is installed at the bottom of the inner cavity of the sink 1 through a bracket and is distributed in parallel with the second pulley 7. The third pulley 8 is arranged just below the edge of the bracket 2. The end of the cable 5 away from the winder 3 passes through the first pulley 6, the second pulley 7, and the third pulley 8 in sequence and extends vertically upward and is connected to the bottom edge of the bracket 2.

[0035] Furthermore, a lifting ring 4 is installed at the bottom edge of the bracket 2, the number of the lifting ring 4 is consistent with the number of the traction mechanism and corresponds one to one, and one end of the cable 5 away from the winder 3 is connected to the lifting ring 4;

[0036] The second pulley 7 is located outside the projection of the bracket 2, the third pulley 8 is located vertically below the lifting ring 4, and a hook is installed at one end of the cable 5 away from the winder 3, through which the cable 5 can be quickly connected to the lifting ring 4;

[0037] Furthermore, the bracket 2 is a rectangular plate with specific dimensions of 2800 mm×2000 mm×50 mm. The bracket 2 is provided with evenly distributed through holes, and the sample to be tested passes through the through holes and is fixed to the bracket 2 by fasteners;

[0038] The axles of the first pulley 6, the second pulley 7, and the third pulley 8 are parallel to each other and are parallel to the long sides of the bracket 2;

[0039] The through holes are symmetrically distributed in a matrix, the diameter of the through holes is 800 mm, and the center distance between two adjacent through holes is 1600 mm;

[0040] There are four lifting rings 4 symmetrically distributed at the four corners of the lower end surface of the bracket 2. The distance between the installation center of the lifting ring 4 and the long side and the wide side of the bracket 2 is 150 mm.

[0041] Specifically, a support beam 9 is installed at the bottom of the bracket 2, and the number of the support beams 9 is multiple and evenly distributed along the length direction of the bracket 2;

[0042] Furthermore, there are two support beams 9 symmetrically distributed on both sides of the lower end surface of the bracket 2. The support beam 9 is a rectangular beam with a specific size of 1400×100 mm, and the long side of the support beam 9 is parallel to the wide side of the bracket 2. The distance between the support beam 9 and the width edge of the bracket 2 is 300 mm.

[0043] Furthermore, the height of the support beam 9 is L, the heights of the second pulley 7 and the third pulley 8 are both m, the sum of the vertical lengths of the lifting ring 4 and the hook is n, L>m+n, when the bottom end of the support beam 9 contacts the bottom surface of the sinking tank 1, there is still a gap between the lifting ring 4 and the third pulley 8, which will not affect the reuse;

[0044] Taking the IPX7 test of the power battery system as an example, the use of the water immersion test device is as follows:

[0045] S1 connects one end of the cable 5 to the winder 3 and passes through the first pulley 6, the second pulley 7, and the third pulley 8 in sequence, and the other end of the cable 5 with the hook extends to the outside of the sinking tank 1;

[0046] S2: Pour clean water into the sinking tank 1 to ensure that after sinking, the distance between the top of the power battery system and the liquid surface is not less than 15 cm;

[0047] S3 The bracket 2 is placed on the ground, the power battery system is placed horizontally on the bracket 2, and bolts are passed through the mounting holes of the power battery system and the through holes on the bracket 2 to securely fix the power battery system on the bracket 2;

[0048] S4 uses a lifting device to lift the power battery system together with the bracket 2 to the water surface, and four cables 5 are respectively connected to the four lifting rings 4 at the bottom of the bracket 2 through hooks, and the lifting device is controlled to descend, so that the power battery system together with the bracket 2 sinks into the water;

[0049] S5: If the power battery system together with the bracket 2 can sink to the bottom of the water steadily, there is no need to start the winder 3; if the power battery system together with the bracket 2 cannot sink to the bottom of the water by its own weight, then the four winders 3 are started synchronously to drive the bracket 2 and the power battery system thereon to sink to the bottom of the water steadily;

[0050] S6 keeps the system immersed in water for 30 minutes, and uses a lifting device to lift the power battery system together with the bracket 2 and place them on the ground. After removing the connection between the power battery system and the bracket 2, the system can be inspected.

[0051] In summary, the immersion test device proposed in the utility model drives the cable 5 to be reeled up by the reel-up machine 3, so that the other end of the cable 5 drives the bracket 2 to move downward, thereby driving the bracket 2 and the battery system thereon to gradually be immersed below the liquid surface of the submersion tank 1, and move to the required immersion depth for testing. The overall structure is simple and easy to operate, and no additional counterweight is required. It solves the problem that the battery system has a low density and cannot sink by its own weight, and is suitable for battery systems of different shapes and mass distributions. Through the one-to-one correspondence between the four traction mechanisms and the four lifting rings 4, the four corners of the bracket 2 are evenly stressed and move downward smoothly, ensuring the overall balance of the bracket 2 and the battery system thereon, avoiding the battery system from tilting up underwater and affecting the actual test, which is beneficial to improving the accuracy of the actual test results.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water immersion test device, characterized in that: It comprises a sinking tank (1), a bracket (2) and a traction mechanism, wherein the traction mechanism is multiple and symmetrically distributed outside the inner cavity of the sinking tank (1), the movable end of the traction mechanism is connected to the bracket (2), and the bracket (2) is driven to move downwards by the traction mechanism to achieve a required immersion depth.

2. A water immersion test device according to claim 1, characterized in that: The traction mechanism comprises a winder (3), a cable (5) and a pulley block, wherein the winder (3) is mounted on the upper end surface of the submersible tank (1), one end of the cable (5) is wound around the winding end of the winder (3), and the other end of the cable (5) extends through the pulley block to the bottom of the inner cavity of the submersible tank (1) and extends upward and is connected to the bracket (2).

3. A water immersion test device according to claim 2, characterized in that: The pulley block comprises a first pulley (6) and a second pulley (7), wherein the first pulley (6) is installed at the opening edge of the sinking tank (1) through a bracket, and the second pulley (7) is installed at the bottom of the inner cavity of the sinking tank (1) through a bracket, and the end of the cable (5) away from the winder (3) passes through the first pulley (6) and the second pulley (7) in sequence and extends upward and is connected to the edge of the bracket (2).

4. A water immersion test device according to claim 3, characterized in that: The pulley block also includes a third pulley (8), which is installed at the bottom of the inner cavity of the sinking tank (1) through a bracket and is distributed in parallel with the second pulley (7). The third pulley (8) is arranged directly below the edge of the bracket (2), and the end of the cable (5) away from the winder (3) passes through the first pulley (6), the second pulley (7), and the third pulley (8) in sequence and extends vertically upward and is connected to the bottom edge of the bracket (2).

5. A water immersion test device according to claim 4, characterized in that: A lifting ring (4) is installed on the bottom edge of the bracket (2), the number of the lifting rings (4) is consistent with the number of the traction mechanisms and corresponds one to one, and one end of the cable (5) away from the winder (3) is connected to the lifting ring (4).

6. The immersion test device according to claim 1, characterized in that: A support beam (9) is installed at the bottom of the bracket (2), and the number of the support beams (9) is multiple and evenly distributed along the length direction of the bracket (2).

7. A water immersion test device according to any one of claims 1 to 6, characterized in that: The inner cavity cross section of the sinking tank (1) is a rectangular surface, the number of the traction mechanisms is four, and the four traction mechanisms are symmetrically distributed at the four corners of the upper end surface of the sinking tank (1).

8. A water immersion test device according to claim 7, characterized in that: The bracket (2) is provided with evenly distributed through holes, and the sample to be tested passes through the through holes and is fixed on the bracket (2) via fasteners.

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