Detection tool

Abstract

The utility model provides a detection tool, the detection tool is used for detecting the air tightness of a battery shell, the detection tool comprises a box body, the box body is provided with an accommodating cavity for accommodating the battery shell, and the battery shell is suitable for being filled with a test medium; the pressure intensity of the medium in the accommodating cavity is suitable for being set to be smaller than the pressure intensity of the test medium in the battery shell; the air tightness of the battery shell is detected by detecting whether the accommodating cavity has the test medium or not.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection equipment technical field, concretely relates to a detection frock. BACKGROUND

[0002] In the related art, the traditional detection method of the detection frock is manual helium spraying, the filling block is inserted into the battery shell and placed on the detection frock, the battery shell is vacuumized after starting, the helium is manually sprayed on the welding position outside the battery shell to detect whether there is a leak hole in the welding position; The defects are as follows: manual feeding is troublesome, the filling block needs to be placed first and then placed on the frock; Manual helium spraying cannot detect the helium spraying pressure, causing helium waste; Manual helium spraying cannot guarantee uniform helium spraying, which may cause missed detection.

[0003] Therefore, the detection frock in the related art has the technical problems of test medium waste and missed detection. UTILITY MODEL CONTENTS

[0004] The embodiment of the utility model provides a kind of detection frock, by filling in test medium to the inside of battery shell, detect whether the test medium in battery shell leaks to outside, to improve the technical problems of test medium waste and missed detection in the detection frock in prior art.

[0005] The embodiment of the utility model provides a kind of detection frock, for detecting the air tightness of battery shell, comprising:

[0006] Box, is equipped with containing cavity to contain the battery shell, the battery shell is suitable for filling test medium in;

[0007] Wherein, the medium pressure in the containing cavity is suitable to be set as less than the pressure of test medium in the battery shell.

[0008] In an embodiment, the medium pressure in the containing cavity is air pressure, and the test medium is gas.

[0009] In an embodiment, the volume for containing gas in the containing cavity is greater than the volume for containing gas in the battery shell.

[0010] In an embodiment, it further includes filling piece, and the filling piece includes filling nozzle, and the filling nozzle is used to fill the test medium into the battery shell.

[0011] In an embodiment, it further includes limiting piece, and the limiting piece includes first pressing plate, and the first pressing plate is used to abut against the battery shell to seal the battery shell.In an embodiment, the filling nozzle is arranged on the first pressing plate.

[0012] In an embodiment, the limiting member further comprises a second pressing plate, which is arranged opposite to the first pressing plate, wherein the second pressing plate is slidingly installed on the box body to abut against the battery shell to seal the battery shell.

[0013] In an embodiment, a first driving member is further included, which is connected to the second pressing plate to drive the second pressing plate to slide towards or away from the battery shell.

[0014] In an embodiment, a box cover and a second driving member are further included, the second driving member is connected to the box cover to drive the box cover to move relative to the box body to cover or open the accommodating cavity.

[0015] In an embodiment, a pin is further included, which is used to fix the battery shell to the box body.

[0016] The beneficial effects of the embodiments of the utility model:

[0017] In the embodiments of the utility model, the battery shell is filled with test medium, the accommodating cavity outside the battery shell has lower medium pressure, so that the test medium can enter the accommodating cavity through the pressure difference and the leak hole on the battery shell, and the air tightness of the battery shell can be detected by detecting whether the accommodating cavity has test medium; since the battery shell is filled with test medium, manual testing is not needed, and missed detection caused by manual operation is avoided; the technical problems of test medium waste and missed detection in the prior art are solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the perspective view of the detection tool provided by the embodiments of the utility model;

[0020] Figure 2 It is the perspective view in the detection tool box provided by the embodiments of the utility model;

[0021] Figure 3 It is the front view in the three views of the detection tool provided by the embodiments of the utility model;

[0022] Figure 4 It is the top view in the three views of the detection tool provided by the embodiments of the utility model;

[0023] Figure 5 is a side view in three views of the detection tool provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific implementation manners described herein are only used for illustrating and explaining the utility model, rather than limiting the utility model. In the utility model, the orientation words such as 'upper' and 'lower' are usually used for indicating the upper and lower in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0025] In addition, the terms 'first','second' and similar words do not represent any order, quantity or importance, but are only used for distinguishing different technical features. The term'multiple' and similar words represent two or more than two, unless otherwise explicitly limited.

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The detection tool 1 provided by the embodiment of the utility model is used for detecting the air tightness of the battery shell 4, and the detection tool 1 comprises a box body 2, the box body 2 is provided with a containing cavity 3 for containing the battery shell 4, and the battery shell 4 is suitable for filling test medium; the medium pressure in the containing cavity 3 is suitable to be set to be less than the pressure of the test medium in the battery shell 4.

[0027] The medium pressure refers to the pressure generated by the medium in the containing cavity 3.

[0028] The medium pressure in the containing cavity 3 can be 0 by vacuumizing the containing cavity 3.

[0029] In the embodiment, by filling the test medium in the battery shell 4, the containing cavity 3 outside the battery shell 4 has a lower medium pressure, so that the test medium can enter the containing cavity 3 through the pressure difference and the leak hole on the battery shell 4, and the air tightness of the battery shell 4 can be detected by detecting whether the containing cavity 3 has the test medium; since the test medium is filled in the battery shell 4, manual testing is not needed, and the missed detection caused by manual operation is also avoided; the technical problems of waste of test medium and missed detection of the detection tool 1 in the prior art are relieved.

[0030] The technical solutions of the present application will be described in combination with specific embodiments.

[0031] In an embodiment, the medium in the accommodating cavity 3 is gas, and the test medium is gas.

[0032] In an embodiment, the test medium is helium.

[0033] It can be understood that, by filling helium into the battery shell 4 and sealing, the accommodating cavity 3 is vacuumized and sealed, and whether the helium leaks into the accommodating cavity 3 is detected, so as to determine the air tightness of the battery shell 4. When the helium is detected in the accommodating cavity 3, it indicates that the air tightness of the battery shell 4 is poor. Conversely, when the helium is not detected in the accommodating cavity 3 after a period of time, it indicates that the air tightness of the battery shell 4 is good.

[0034] In the embodiment, the test medium is set as helium, which facilitates the detection of whether the helium leaks, and improves the detection efficiency.

[0035] In an embodiment, the accommodating cavity 3 can be provided with low-pressure liquid with small pressure, and the battery shell 4 can be provided with high-pressure liquid with large pressure. The pressure of the high-pressure liquid in the battery shell 4 is greater than the pressure of the low-pressure liquid in the accommodating cavity 3, so as to form the pressure difference between the inside and outside of the battery shell 4.

[0036] It can be understood that, the pressure of the high-pressure liquid in the battery shell 4 is greater than the pressure of the low-pressure liquid in the accommodating cavity 3. When the battery shell 4 has a leak hole, the high-pressure liquid can enter the accommodating cavity 3 from the leak hole under the action of the pressure difference, so as to determine the air tightness of the battery shell 4 by detecting whether the high-pressure liquid is mixed in the low-pressure liquid in the accommodating cavity 3, and facilitate the detection of the air tightness of the battery shell 4.

[0037] In an embodiment, the volume of the accommodating cavity 3 for accommodating the gas is greater than the volume of the battery shell 4 for accommodating the gas.

[0038] It can be understood that, since the volume of the battery shell 4 is smaller than the volume of the accommodating cavity 3, the test medium is filled into the battery shell 4, which can reduce the use of the test medium compared with filling the test medium into the accommodating cavity 3, so as to avoid the waste of medium resources.

[0039] In an embodiment, referring to Figure 1 and Figure 2 the present application further comprises a filling member 5, and the filling member 5 comprises a filling nozzle for filling the test medium into the battery shell 4.

[0040] The filling nozzle is in communication with the inner cavity in the battery shell 4, so as to fill the test medium into the battery shell 4.

[0041] It can be understood that when the filling nozzle fills the test medium into the inner cavity of the battery shell 4, the inner cavity of the battery shell 4 needs to be in a sealed state to avoid the test medium from leaking into the accommodation cavity 3 during the process of filling the test medium into the inner cavity of the battery shell 4, thereby causing false detection.

[0042] In the embodiment, by arranging the filling nozzle of the filling member 5, the inner cavity of the battery shell 4 is sealed, the test medium is filled into the battery shell 4, and the pressure of the inner cavity of the battery shell 4 is controlled, so as to detect the air tightness of the battery shell 4.

[0043] In an embodiment, referring to Figure 1 and Figure 2 The limiting member 6 further comprises a first pressing plate 61 for abutting against the battery shell 4 to seal the battery shell 4.

[0044] The first pressing plate 61 is arranged in position with the inner cavity of the battery shell 4 and is used to adhere to the battery shell 4 to seal the inner cavity.

[0045] The battery shell 4 can be provided with only one opening, the opening is in position with the first pressing plate 61, and the first pressing plate 61 covers at least the opening.

[0046] It can be understood that the first pressing plate 61 is arranged on one side of the opening of the battery shell 4 to achieve good sealing of the battery shell 4.

[0047] In an embodiment, at least one sealing member can be arranged between the first pressing plate 61 and the battery shell 4.

[0048] The sealing member can be a sealing ring.

[0049] The region where the first pressing plate 61 contacts the battery shell 4 can be provided with a groove, and the sealing ring can be arranged in the groove.

[0050] The sealing ring can be of an elastic structure, and the sealing ring and the battery shell 4 can be in interference fit to improve the sealing effect.

[0051] It can be understood that the sealing member is used to enhance the sealing between the first pressing plate 61 and the battery shell 4, so as to avoid the test medium from leaking from the adhesion position between the first pressing plate 61 and the battery shell 4 when the test medium is filled into the inner cavity of the battery shell 4, thereby improving the accuracy of the air tightness detection of the battery shell 4.

[0052] In the embodiment, the sealing member is arranged to improve the sealing effect between the first pressing plate 61 and the battery shell 4, thereby improving the accuracy of the air tightness detection of the battery shell 4.

[0053] In an embodiment, the filling nozzle is arranged on the first pressing plate 61.

[0054] The filling nozzle is arranged on the first pressing plate 61.

[0055] It can be understood that after the first pressing plate 61 is sealingly attached to the battery shell 4, the filling nozzle is located in the inner cavity formed by the first pressing plate 61 and the battery shell 4, at this time, the inner cavity is in a sealed state, and the filling nozzle fills the test medium into the battery shell 4 to realize the detection of the air tightness of the battery shell 4.

[0056] In an embodiment, referring to Figure 1 、 Figure 2 、 Figure 4 The limiting member 6 further comprises a second pressing plate 62, which is arranged opposite to the first pressing plate 61, wherein the second pressing plate 62 is slidingly installed on the box body 2 to abut against the battery shell 4 to seal the battery shell 4.

[0057] The second pressing plate 62 slides along the first guide rail 9.

[0058] The first guide rail 9 can extend along the length direction of the box body 2.

[0059] The second pressing plate 62 is used to abut against the other end of the battery shell 4 relative to the first pressing plate 61, and cooperates with the first pressing plate 61 to seal the battery shell 4.

[0060] The first pressing plate 61 can also be slidingly installed on the box body 2.

[0061] It can be understood that at least the second pressing plate 62 is slidingly installed on the box body 2, so that the second pressing plate 62 can slide towards or away from the battery shell 4, and the second pressing plate 62 and the first pressing plate 61 press the battery shell 4 in the middle to improve the sealing effect of the battery shell 4.

[0062] In the embodiment, by enabling the first pressing plate 61 and the second pressing plate 62 to slide relative to each other to be attached to the battery shell 4, the battery shell 4 is better sealed, and the test medium is prevented from leaking from the battery shell 4 and the first pressing plate 61, thereby avoiding false detection and improving the accuracy of the air tightness detection of the battery shell 4.

[0063] In an embodiment, the detection tool 1 further comprises a first driving member connected to the second pressing plate 62 to drive the second pressing plate 62 to slide towards or away from the battery shell 4.

[0064] The detection tool 1 further comprises a third driving member for driving the first pressing plate 61 to slide towards or away from the battery shell 4.

[0065] It can be understood that the first pressing plate 61 and the second pressing plate 62 move along the same first guide rail 9, and a fixing member is further arranged on the bottom surface of the box body 2, which is used for fixing and positioning the battery shell 4 on the bottom surface of the box body 2. After the battery shell 4 is fixed and positioned by the fixing member, the first pressing plate 61 and the second pressing plate 62 move along the first guide rail 9 towards the battery shell 4 to clamp the battery shell 4.

[0066] In the embodiment, the first pressing plate 61 and the second pressing plate 62 move along the first guide rail 9 to clamp the battery shell 4, which can improve the sealing effect of the battery shell 4 on one hand. On the other hand, when the battery shell 4 is replaced, the first pressing plate 61 and the second pressing plate 62 can move away from the battery shell 4 to loosen the battery shell 4, which is convenient for replacement.

[0067] In an embodiment, referring to Figure 1 , Figure 3 , Figure 4 , Figure 5 Further comprising a box cover 7 and a second driving member 8, the second driving member 8 is connected to the box cover 7, which is used for driving the box cover 7 to move relative to the box body 2 to cover or open the containing cavity 3.

[0068] It can be understood that the box cover 7 can be opened or closed relative to the box body 2. By moving the box cover 7 to open, the battery shell 4 is placed in, and then the box cover 7 is moved to close, so that the containing cavity 3 is in a sealed state.

[0069] In the embodiment, by setting the box cover 7 to be opened or closed, the box cover 7 is opened to facilitate the placement of the battery shell 4, and the box cover 7 is closed to achieve the sealing of the containing cavity 3, which is convenient for detecting the air tightness of the battery shell 4.

[0070] In an embodiment, further comprising a pin, which is used for fixing the battery shell 4 to the box body 2.

[0071] Further comprising a hexagonal bolt, which is used for fixing the battery shell 4 to the box body 2 together with the pin, so as to improve the stability of the fixing of the battery shell 4.

[0072] It can be understood that the pin and the hexagonal bolt are used to fix the battery shell 4, which can realize high-precision positioning of the battery shell 4 and prevent the battery shell 4 from being offset due to manual placement.

[0073] It can be understood that in the aspect of rapid replacement, in the existing design, the battery shell 4 in the box needs to be taken out after the screws are removed and the cylindrical head pin is removed, and then the battery shell 4 in the box is taken out, which is often difficult to take out and consumes a lot of time. The pin in the embodiment is a quick pull pin, so that time is saved when the battery shell 4 is replaced, and the detection effect of the air tightness detection of the battery shell 4 is improved.

[0074] In an embodiment, refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 , further comprising a guide rail support 11 and a second guide rail 10.

[0075] Wherein the second driving member 8 is a cylinder base.

[0076] Wherein the guide rail support 11 is used for fixing the second guide rail 10, and the box cover 7 moves along the second guide rail 10 to realize the opening or closing of the box body 2.

[0077] Wherein the cylinder base is used for connecting with the box cover 7 to drive the box cover 7 to move along the second guide rail 10.

[0078] Wherein the second guide rail 10 extends along the width direction of the box body 2.

[0079] It can be understood that the guide rail support 11, the second guide rail 10 and the cylinder base are used for controlling the movement of the box cover 7 towards or away from the box body 2 to realize the sealing or opening of the box body 2.

[0080] The utility model provides a kind of detection tool 1, by placing battery shell 4 in the containing cavity 3 of box body 2, and filling into test medium in battery shell 4 and sealing, test medium exists only in battery shell 4 at this time, by adjusting the pressure between battery shell 4 and containing cavity 3, the pressure of the inner cavity in battery shell 4 is greater than the pressure of containing cavity 3, for the battery shell 4 with leak hole, test medium can be leaked into containing cavity 3 by the leak hole on battery shell 4, by detecting whether test medium exists in containing cavity 3, to judge the good or bad of the air tightness of battery shell 4.

[0081] In an embodiment, refer to Figure 2 , box body 2 is further provided with other limiting components, and the limiting components are used for fixing and limiting the battery shell 4.

[0082] Wherein the limiting component further includes a bottom plate, a top plate and two support plates 63, the bottom plate and the top plate are respectively located at two ends of the battery shell 4 along the thickness direction of the box body 2, and the two support plates 63 are respectively attached to two ends of the battery shell 4 along the width direction of the box body 2, and the bottom plate, the top plate, the two support plates 63 and the pressing plate are collectively used for fixing the battery shell 4.

[0083] The utility model only needs to fill test medium in battery shell 4, the gas volume in battery shell 4 is smaller, can save test medium, avoid the waste of test medium.

[0084] The utility model discloses a battery shell 4 exists test medium in, and test medium under the action of internal and external pressure difference, will move towards accommodating cavity 3, therefore, when the battery shell 4 exists leak hole, test medium can be detected in accommodating cavity 3, relative to artificial manual helium injection detection, the detection of battery shell 4's undetected rate is lower, can improve the accuracy of battery shell 4 air tightness detection.

[0085] Compared with the existing detection mode, the battery shell 4 is filled with a filling block to avoid sample internal deformation due to vacuumization, and the artificial helium injection may exist uneven helium injection, resulting in undetected and misdetected, and the waste of helium defects, the utility model has also improved the detection accuracy, by vacuumizing the outside of the battery shell 4, the battery shell 4 is filled with test medium inside and will not be deformed due to vacuumization, the filling block in the sample can be cancelled, the filling block is saved, and the cost is reduced.

[0086] Meanwhile, the utility model is by the internal and external pressure difference of battery shell 4, the helium injection in battery shell 4, the vacuumization outside, to detect whether helium leaks, need not artificial helium injection, save the manual, also improve the test efficiency and accuracy of battery shell 4 air tightness.

[0087] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this paper by the specific example, the above embodiment's explanation is only for helping understanding the method of the utility model and its core thought, simultaneously, for the technical personnel of the field, according to the thought of the utility model, in specific implementation mode and application range, will have the change of place, and the above-mentioned, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A detection tool (1) for detecting the air tightness of a battery case (4), characterized in that, include: The housing (2) has a receiving cavity (3) to receive the battery housing (4), and the battery housing (4) is suitable for filling with test medium; The medium pressure in the accommodating cavity (3) is adapted to be set to be lower than the pressure of the test medium in the battery casing (4).

2. The detection tool (1) according to claim 1, characterized in that The medium pressure inside the cavity (3) is gas pressure, and the test medium is gas.

3. The detection tool (1) according to claim 2, characterized in that The volume of the cavity (3) for containing gas is greater than the volume of the battery casing (4) for containing gas.

4. The detection tool (1) according to claim 1, characterized in that It also includes a filling component (5), which includes a filling nozzle for filling the test medium into the battery casing (4).

5. The detection tool (1) according to claim 4, characterized in that It also includes a limiting member (6), which includes a first pressure plate (61) for abutting against the battery housing (4) to seal the battery housing (4).

6. The detection tool (1) according to claim 5, characterized in that The filling nozzle is located on the first pressure plate (61).

7. The detection tool (1) according to claim 5, characterized in that The limiting member (6) further includes a second pressure plate (62), which is disposed opposite to the first pressure plate (61). The second pressure plate (62) is slidably mounted on the housing (2) to abut against the battery housing (4) to seal the battery housing (4).

8. The detection tool (1) according to claim 7, characterized in that It also includes a first driving member connected to the second pressure plate (62) to drive the second pressure plate (62) to slide toward or away from the battery casing (4).

9. The detection tool (1) according to any one of claims 1 to 3, characterized in that It also includes a lid (7) and a second drive member (8), the second drive member (8) being connected to the lid (7) for driving the lid (7) to move relative to the box body (2) to cover or open the receiving cavity (3).

10. The detection tool (1) according to any one of claims 1 to 8, characterized in that It also includes pins for securing the battery housing (4) to the housing (2).

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