Airtightness detection device for battery box

Abstract

The utility model relates to an air tightness detection device used for a battery box, comprising a pedestal used for carrying a battery box to be detected and a plugging mechanism used for plugging a sleeve. The at least two plugging pieces are distributed in the length direction of the pressing arm, and each plugging piece corresponds to the corresponding sleeve in a one-to-one mode and is used for plugging the corresponding sleeve; the pressing components are arranged at the two ends of the pressing arm and connected to the base and can press the pressing arm to enable the plugging pieces to plug the sleeves in the state that the plugging pieces correspond to the corresponding sleeves. According to the plugging mechanism of the airtightness detection device for the battery box, the sleeve is plugged in the mode that the pressing arm is pressed by the pressing component, the pressing arm and the plugging piece are manually placed and aligned, the pressing component only plays a role in pressing the pressing arm and does not drive the pressing arm, the situation that the pressing arm is erected to hinder feeding and discharging of an operator is avoided, and meanwhile, the plugging efficiency is greatly improved. And the problem of poor precision of repeated positioning is avoided by manual alignment.

Description

Technical Field

[0001] This utility model relates to the field of battery box airtightness testing, and in particular to an airtightness testing device suitable for battery box sealing. Background Technology

[0002] When a new energy vehicle starts, brakes, or travels on bumpy roads, the battery exerts pressure and impact on its mounting structure due to inertia. To ensure a secure hold on the battery, the mounting structure includes a battery sleeve. When connecting the battery sleeve to other parts of the mounting structure, internal through holes allow rod-shaped parts to pass through, while external flat steps can nest with external parts, thus securing the battery sleeve together with other components.

[0003] Because the battery box needs to ensure its sealing performance, it is necessary to conduct an airtightness test. However, during the airtightness test, the sleeves are often not yet welded to the battery box, and air leakage may occur due to the assembly gaps. Therefore, it is necessary to seal the welding positions of the sleeves during the test. Due to the large size of the battery box, existing technologies often use a long pressure arm to seal each sleeve. For example, Chinese invention patent No. ZL202110717795.8 (authorization announcement No. CN113390567B) discloses "An Airtightness Testing Device and Adhesive Application System for a Battery Box Top Cover". This airtightness testing device includes a pressure arm connected to a cylinder for sealing. The pressure arm is equipped with sealing parts corresponding to the holes to be sealed. The cylinder drives the pressure arm to rotate toward the holes to be sealed to press the battery box and complete the sealing. After the test is completed, the pressure arm can be driven to open.

[0004] However, the above-mentioned airtightness testing device still has the following drawbacks: First, the pressure arm is in a vertical position when it is not sealed, which will hinder the operation of workers loading and unloading parts; Second, due to the long size of the pressure arm, its repeatability is poor and the sealing effect at the end of the pressure arm is not good, requiring frequent correction; Third, the pressure arm requires a large cylinder to drive it, and there is a safety hazard when the pressure arm is opened, requiring the configuration of a safety light curtain, which increases the area and cost of the device. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an airtightness detection device that can avoid hindering operators from loading and unloading parts and improve repeatability accuracy, in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: the airtightness testing device for a battery box includes a base for placing the battery box to be tested and a limiting mechanism disposed on the base and capable of limiting the battery box to be tested on the base, wherein at least two sleeves are pre-installed on the battery box to be tested, characterized in that: it further includes a sealing mechanism for sealing the sleeves, the sealing mechanism including:

[0007] Pressure arm;

[0008] At least two sealing components are distributed along the length of the pressure arm, and each sealing component corresponds to a sleeve and is used to seal its corresponding sleeve.

[0009] A clamping component is disposed at both ends of the clamping arm and connected to the base. It can clamp the clamping arm so that the clamping component seals the sleeve when each of the sealing components is in a state corresponding to its corresponding sleeve.

[0010] To enable the clamping component to clamp the pressure arm, preferably, the clamping component includes a clamping element and a driving element. The clamping element is connected to the power output end of the driving element, and the driving element can drive the clamping element to rotate to switch between a clamped state and a de-clamped state. This clamping mechanism only needs to drive the clamping element, avoiding the problem of needing to drive the pressure arm to rotate in the prior art. Therefore, it reduces the driving force required by the driving element. When the driving element drives the clamping element to rotate downwards, the clamping element enters the clamping state and clamps the pressure arm; when the driving element drives the clamping element to rotate upwards, the clamping element releases the clamping state and releases the pressure arm.

[0011] As a type of clamping component, preferably, the clamping component includes a clamping part and a connecting part perpendicularly connected to the clamping part. The connecting part is connected to the power output end of the driving component, and the clamping part is used to clamp the pressure arm. The connecting part and the clamping part of the clamping component can also be connected at other angles, such as the clamping part and the connecting part being on the same straight line.

[0012] In order to enable the plugging member to plug the sleeve, preferably, a groove portion is formed by concave - up on the bottom portion of the plugging member, and the groove portion surrounds the through - hole of the sleeve and forms a sealed space. The relationship between the radius d1 of the groove portion and the radius d2 of the through - hole of the sleeve satisfies: d2 < d1 < 1.5d2. Since the airtightness test is carried out before the sleeve is welded, there is a gap between the sleeve and the battery box to be detected. The plugging member needs to plug this gap, that is, the outer edge of the groove portion should surround this gap. Therefore, the radius d1 of the groove portion should be greater than the radius d2 of the through - hole of the sleeve. When performing the airtightness test, the gas needs to fill the battery box to be detected and the groove portion. If the radius d1 of the groove portion is too large, it will be necessary to increase the amount of gas during the airtightness test and increase the waiting time for inflation. Therefore, the radius d1 of the groove portion is limited to be less than 1.5 times the radius d2 of the through - hole of the sleeve.

[0013] In order to form a sealed space in the groove portion, preferably, the bottom periphery of the plugging member has an annular groove, and a sealing ring is arranged in the annular groove. In this way, the plugging member and the battery box are sealed, avoiding the leakage of the gas used for the airtightness test due to the gap between the plugging member and the battery box.

[0014] Furthermore, a handle for facilitating the operator to pick up and place the pressing arm is provided on the pressing arm. The setting of this handle facilitates the operator to apply force to the pressing arm, so as to conveniently place the pressing arm on the battery box corresponding to the plugging member and the sleeve one by one before the airtightness test, and to conveniently remove the pressing arm after the airtightness test is completed.

[0015] In order to limit the battery box to be detected on the base, preferably, the limiting mechanism includes a first limiting component for limiting the battery box to be detected in the X - axis or Y - axis direction of the base, and a second limiting component for pressing the battery box to be detected downward along the Z - axis of the base. Through the cooperation of the first limiting component and the second limiting component, the battery box to be detected can be limited on the base.

[0016] In order to limit the battery box to be detected in the X - axis or Y - axis direction of the base, preferably, the first limiting component includes a first driving part arranged on the base and a first limiting member arranged at the power output end of the first driving part. The first driving part can drive the first limiting member to stretch along the X - axis or Y - axis direction of the base to limit the battery box to be detected in the X - axis or Y - axis direction. When the first driving part extends along the X - axis or Y - axis direction, the first driving part clamps the battery box to be detected from both ends of the battery box to limit the battery box to be detected in the X - axis or Y - axis direction. When the first driving part retracts along the X - axis or Y - axis direction, the clamping force on the battery box to be detected disappears and the battery box to be detected is released.

[0017] In order to press the battery box to be tested downward along the Z-axis of the base, preferably, the second limiting component includes a second driving part disposed on the base and a second limiting member disposed on the power output end of the second driving part. The second driving part can drive the second limiting member to rotate around the X-axis or Y-axis of the base to press the battery box to be tested downward along the Z-axis of the base.

[0018] Furthermore, the base is also provided with a protective seat, which, together with the side wall of the base, forms a protective space, within which the second drive unit is located. This protective seat encloses the second drive unit within the protective space, improving the safety of the operator.

[0019] Compared with the prior art, the advantages of this utility model are as follows: the sealing mechanism of the airtightness detection device for the battery box uses a pressing component to press the pressing arm to seal the sleeve. The pressing arm and sealing component are manually placed and aligned. The pressing component only presses the pressing arm without driving it, which avoids the pressing arm standing up and hindering the operator from loading and unloading the parts. At the same time, manual alignment avoids the problem of poor positioning accuracy due to repeated positioning. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Sectional view of AA;

[0022] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0023] Figure 4 This is a schematic diagram of the sealing mechanism in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0025] Figure 6 This is a structural schematic diagram of the contact and pressing state of the pressing component in an embodiment of this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments.

[0027] like Figures 1-6The image shows a preferred embodiment of the present invention. The airtightness testing device for a battery box Q in this embodiment includes a base 1 for mounting the battery box Q to be tested, a limiting mechanism 2 disposed on the base 1 and capable of limiting the battery box Q to be tested on the base 1, and a sealing mechanism 3. Two sets of sleeves P are pre-installed on the battery box Q to be tested. All sleeves P in each set of sleeves P are collinear. One set of sleeves P has four sleeves P, and the other set has two sleeves P. There is an installation gap between the sleeves P and the battery box Q to be tested. Each set of sleeves P is correspondingly provided with a sealing mechanism 3 to seal the installation gap.

[0028] See Figure 1-2 The sealing mechanism 3 includes a pressure arm 31, sealing elements 32, and a clamping member 33. At least two sealing elements 32 are distributed along the length of the pressure arm 31, each corresponding to a sleeve P and used to seal its corresponding sleeve P. Specifically, the sealing mechanism 3 for sealing four sleeves P has four sealing elements 32, while the sealing mechanism 3 for sealing two sleeves P has two sealing elements 32. The clamping member 33 is located at both ends of the pressure arm 31 and connected to the base 1. The clamping member 33 can clamp the pressure arm 31 to seal the sleeve P when each sealing element 32 corresponds to its corresponding sleeve P. For ease of operation, the pressure arm 31 of the sealing mechanism 3 is provided with a handle for easy handling by the operator. The handle makes it easy for the operator to apply force to the pressure arm 31, so that the sealing component 32 and the sleeve P are placed on the battery box Q in a one-to-one correspondence before the airtightness test, and the pressure arm 31 can be removed after the airtightness test.

[0029] See Figure 3, a concave groove portion 321 is formed in the central part of the bottom of the plugging member 32. The groove portion 321 surrounds the through hole of the sleeve P and forms a sealed space. The radius d1 of the groove portion 321 and the radius d2 of the through hole of the sleeve P satisfy: d2 < d1 < 1.5d2. Since the airtightness test is carried out before the sleeve P is welded, there is a gap between the sleeve P and the battery box Q to be detected. The plugging member 32 needs to plug this gap, that is, the outer edge of the groove portion 321 should surround this gap. Therefore, the radius d1 of the groove portion 321 should be greater than the radius d2 of the through hole of the sleeve P. When performing the airtightness test, the gas needs to fill the battery box Q to be detected and the groove portion 321. If the radius d1 of the groove portion 321 is too large, the amount of gas during the airtightness test and the waiting time for inflation need to be increased. Therefore, the radius d1 of the groove portion 321 is limited to be less than 1.5 times the radius d2 of the through hole of the sleeve P. In addition, an annular groove 322 is provided at the peripheral edge of the bottom of the plugging member 32, and a sealing ring 34 is arranged in the annular groove 322. The arrangement of the sealing ring 34 enables an interference fit between the plugging member 32 and the battery box Q, so as to seal between the plugging member 32 and the battery box Q, and avoid the gas used for the airtightness test from overflowing due to the gap between the plugging member 32 and the battery box Q, thereby increasing the reliability of the plugging mechanism 3.

[0030] See Figure 4-6 , the pressing member 33 includes a pressing part 331 and a driving part 332. The pressing part 331 includes a pressing portion 331a and a connecting portion 331b perpendicularly connected to the pressing portion 331a. The connecting portion 331b is connected to the power output end of the driving part 332, and the pressing portion 331a is used to press the pressing arm 31. The driving part 332 can drive the pressing member 331 to rotate to switch between the pressing state and the releasing state of pressing the pressing arm 31. When the driving part 332 drives the pressing member 331 to rotate downward, the pressing member 331 enters the pressing state and presses the pressing arm 31; when the driving part 332 drives the pressing member 331 to rotate upward, the pressing member 331 releases the pressing state and releases the pressing arm 31.

[0031] In addition, see Figure 1The limiting mechanism 2 in this embodiment includes a first limiting component 21 for limiting the battery box Q to be tested in the X-axis direction of the base 1, and a second limiting component 22 for pressing the battery box Q to be tested downward along the Z-axis of the base 1. In this embodiment, two sets of first limiting components 21 are provided, located at both ends of the battery box Q along the X-axis direction. Each set of first limiting components 21 has four components. Each first limiting component 21 includes a first driving part 211 provided on the base 1 and a first limiting member provided at the power output end of the first driving part 211. The first driving part 211 can drive the first limiting member to extend and retract along the X-axis direction of the base 1 to limit the battery box Q to be tested in the X-axis direction. When the first driving part 211 extends along the X-axis direction, the two first driving parts 211 clamp the battery box Q to be tested from both ends of the battery box Q to be tested to limit the battery box Q to be tested in the X-axis direction. When the first driving part 211 retracts along the X-axis direction, the clamping force on the battery box Q to be tested disappears, and the battery box Q to be tested is released. The second limiting component 22 includes a second driving part 221 disposed on the base 1 and a second limiting member disposed at the power output end of the second driving part 221. The second driving part 221 can drive the second limiting member to rotate around the X-axis or Y-axis of the base 1 to press the battery box Q to be tested downward along the Z-axis of the base 1. The driving method of the second driving part 221 is the same as that of the driving member 332 mentioned above, and will not be described again here. Through the cooperation of the first limiting component 21 and the second limiting component 22, the battery box Q to be tested can be limited on the base 1. In addition, in this embodiment, the base 1 is also provided with a protective seat 23. Each second driving part 221 and driving member 332 is provided with a corresponding protective seat 23. Each protective seat 23 and the side wall of the base 1 enclose a protective space 4. The second driving part 221 and driving member 332 are disposed in the protective space 4. The protective seat 23 can surround the second driving part and driving member 332 in the protective space 4, improving the safety of the operator.

[0032] In summary, the operation steps of the airtightness detection device for battery box Q in this embodiment are as follows:

[0033] a. Place the battery box Q to be tested on the base 1, so that the first limiting component 21 clamps the battery box Q to be tested in the X-axis direction of the base 1, and the second limiting component 22 presses the battery box Q to be tested in the Z-axis direction of the base 1.

[0034] b. The operator places the pressure arm 31 on the battery box Q to be tested and aligns the sealing part 32 with the sleeve P one by one;

[0035] c. The driving component 332 drives the clamping component 331 to rotate downward. After the clamping component 331 clamps the two ends of the pressure arm 31, the air tightness test begins.

[0036] d. After the airtightness test is completed, the driving component 332 drives the clamping component 331 to rotate upward, and the clamping component 331 releases the pressure arm 31;

[0037] e. The operator removes the pressure arm 31 from the tested battery box Q;

[0038] f. Remove the tested battery box Q from the base 1, replace it with the next battery box Q to be tested, and perform the next round of testing.

Claims

1. Airtightness detection device for battery boxes (Q), comprising a base (1) for placing the battery box (Q) to be detected and a limiting mechanism (2) provided on the base (1) and capable of limiting the battery box (Q) to be detected on the base (1), wherein, The battery box (Q) to be detected is pre-installed with at least two sleeves (P), characterized in that a sealing mechanism (3) for sealing the sleeves (P) is further included, the sealing mechanism (3) comprises: a pressing arm (31); a sealing piece (32) distributed along the length direction of the pressing arm (31), each of the sealing pieces (32) corresponds to one of the sleeves (P) and is used for sealing the corresponding sleeve (P); a pressing member (33) arranged at both ends of the pressing arm (31) and connected to the base (1), capable of pressing the pressing arm (31) to make the sealing piece (32) seal the sleeve (P) in a state that each of the sealing pieces (32) corresponds to the corresponding sleeve (P).

2. The air tightness detection apparatus according to claim 1, characterized in that: The pressing member (33) comprises a pressing piece (331) and a driving piece (332), the pressing piece (331) is connected to the power output end of the driving piece (332), and the driving piece (332) is capable of driving the pressing piece (331) to rotate to switch between the pressing state and the unpressing state of the pressing arm (31).

3. The air tightness detection apparatus according to claim 2, characterized in that: The pressing piece (331) comprises a pressing part (331a) and a connecting part (331b) connected perpendicularly to the pressing part (331a), the connecting part (331b) is connected to the power output end of the driving piece (332), and the pressing part (331a) is used for pressing the pressing arm (31).

4. The leak detection apparatus of any one of claims 1-3, wherein: A groove part (321) is concavely formed on the bottom part of the sealing piece (32), the groove part (321) surrounds the through hole of the sleeve (P) and forms a sealed space, and the radius d1 of the groove part (321) and the radius d2 of the through hole of the sleeve (P) satisfy the relationship of d2 < d1 < 1.5d2.

5. The air tightness detection apparatus according to claim 4, characterized in that: The bottom periphery of the sealing piece (32) has an annular groove (322), and a sealing ring (34) is arranged in the annular groove (322).

6. The leak detection apparatus of any one of claims 1-3, wherein: A handle is arranged on the pressing arm (31) to facilitate the staff to take and place the pressing arm (31).

7. The leak detection apparatus of any one of claims 1-3, wherein: The limiting mechanism (2) comprises a first limiting assembly (21) for limiting the battery box (Q) to be detected in the X-axis or Y-axis direction of the base (1), and a second limiting assembly (22) for pressing the battery box (Q) to be detected downward along the Z-axis of the base (1).

8. The air tightness detection apparatus according to claim 7, characterized in that: The first limiting assembly (21) comprises a first driving part (211) arranged on the base (1) and a first limiting part (212) arranged on the power output end of the first driving part (211), and the first driving part (211) is capable of driving the first limiting part (212) to stretch or contract along the X-axis or Y-axis direction of the base (1) to limit the battery box (Q) to be detected in the X-axis or Y-axis direction.

9. The air tightness detection apparatus according to claim 7, characterized in that: The second limiting assembly (22) comprises a second driving part (221) arranged on the base (1) and a second limiting part (222) arranged on the power output end of the second driving part (221), and the second driving part (221) is capable of driving the second limiting part (222) to rotate around the X-axis or Y-axis direction of the base (1) to press the battery box (Q) to be detected downward along the Z-axis of the base (1).

10. The air tightness detection apparatus according to claim 9, characterized in that: The base (1) is further provided with a protection seat (23), the protection seat (23) and the side wall of the base (1) form a protection space (4), and the second driving part (221) is arranged in the protection space (4).

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