Integrated sealing detection device

Abstract

An integrated sealing detection device comprises an upper shell, a lower shell and a liquid injection port detection head, the upper shell and the lower shell are combined to form a containing cavity used for containing a battery cell, and the liquid injection port detection head is arranged on the shell in the mode that the liquid injection port detection head can move up and down in the axis direction of the liquid injection port detection head and is used for abutting against a battery cell liquid injection port. When the upper shell is combined with the lower shell and the liquid injection port detection head abuts against the battery cell liquid injection port, a first sealed space is formed between the upper shell and the lower shell, and an independent second sealed space is formed between the liquid injection port detection head and the battery cell liquid injection port. And the first sealed space and the second sealed space are respectively communicated with one leak detection gas detection sensor. The integrated sealing detection device can simultaneously detect the sealing performance of the battery cell body and the liquid injection port of the battery cell at the same station.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core sealing performance detection, in particular to an integrated sealing detection device. Background Art

[0002] With the rapid development of new energy vehicles, people have increasingly higher requirements for the sealing and protection performance of power battery cells. In some fields, the sealing performance of battery cells is required to meet the protection requirements of IP67 or even IP68.

[0003] In order to detect whether the sealing performance of the battery cell meets the requirements, it is generally necessary to test the sealing performance of the battery cell body and the liquid injection port of the battery cell.

[0004] In the prior art, the above two tests are generally performed in two steps. That is, the sealing performance of the battery cell body is generally tested first, and then a leak detection gas, such as helium, is injected into the battery cell injection port to test the sealing performance of the battery cell injection port.

[0005] However, the above-mentioned method takes a long time to detect, which is not conducive to improving production efficiency. Utility Model Content

[0006] In order to solve the above technical problems, the present invention provides an integrated sealing detection device, which can simultaneously detect the sealing performance of the battery body and the liquid injection port of the battery cell at the same workstation.

[0007] The present utility model provides an integrated sealing detection device, comprising an upper shell, a lower shell and a liquid injection port detection head, wherein the upper shell and the lower shell are combined into an accommodating cavity for accommodating a battery cell, and the liquid injection port detection head can be arranged on the shell so as to be movable up and down along its own axial direction, and is used to abut against the battery cell liquid injection port, when the upper shell is combined with the lower shell, and the liquid injection port detection head abuts against the battery cell liquid injection port, a first sealed space is formed between the upper shell and the lower shell, and an independent second sealed space is formed between the liquid injection port detection head and the battery cell liquid injection port, and the first sealed space and the second sealed space are respectively connected to one of the leak detection gas sensors.

[0008] Furthermore, a vacuum joint for evacuating the first sealed space, a detection joint for detecting gas leaks in the first sealed space, and an inflation joint for breaking the vacuum in the first sealed space are also provided on the upper shell.

[0009] Furthermore, the liquid filling port detection head is fixed to the upper surface of the upper shell through a support, a through hole is formed on the top of the upper shell, and the liquid filling port detection head passes through the through hole and extends downward.

[0010] Furthermore, a first sealing ring is formed between the liquid filling port detection head and the side wall of the through hole.

[0011] Furthermore, the width of the bottom of the support is greater than the width of the through hole, and a second sealing ring is provided at the bottom of the support, and the second sealing ring is provided between the bottom of the support and the top of the upper shell.

[0012] The support is also provided with a telescopic cylinder for driving the liquid filling port detection head to move up and down relative to the upper shell.

[0013] Furthermore, a plurality of first grooves are provided in the lower shell, and a plurality of second grooves corresponding to the first grooves are provided in the upper shell. When the lower shell is combined with the upper shell, each of the first grooves and one of the second grooves encloses the sealed space.

[0014] Furthermore, the lifting device includes a cylinder, a push rod and a support plate. The cylinder is fixed on the stationary part of the integrated sealing detection device. One end of the push rod is connected to the cylinder, and the other end is connected to the support plate. The cylinder drives the push rod to move up and down along the axial direction of the push rod, and the support plate is used to support the lower shell.

[0015] Furthermore, a third sealing ring is provided between the upper end surface of the first groove and the lower end surface of the second groove.

[0016] In summary, in this embodiment, the structural arrangement of the upper and lower shells and the liquid injection port detection head allows for the direct formation of two independent sealed spaces within the device, with the battery cell body positioned within the first sealed space and the battery cell liquid injection port positioned within the second sealed space. After injecting a leak detection gas into the battery cell liquid injection port, leak detection gas sensors connected to each sealed space can detect the leak detection gas, such as helium, in both spaces. This allows the sealing performance of both the battery cell body and the liquid injection port to be tested simultaneously in the same process, reducing costs.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of the axial structure of the integrated sealing detection device provided in an embodiment of the present utility model.

[0019] Figure 2 Shown Figure 1 Schematic diagram of the top view of the integrated sealing detection device.

[0020] Figure 3 Shown Figure 2 Schematic diagram of the cross-sectional structure along the III-III direction.

[0021] Figure 4 Shown is a schematic diagram of the axial side structure of the upper shell.

[0022] Figure 5 The figure shows the axial structure diagram when the battery cell is installed in the lower shell.

[0023] Figure 6 Shown is a schematic diagram of the axial structure of the liquid injection port detection head.

[0024] Figure 7 Shown is a schematic structural diagram of the lower shell being arranged on the lifting device. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description with reference to the accompanying drawings and preferred embodiments.

[0026] The utility model provides an integrated sealing detection device, which can detect the sealing performance of a battery core body and a liquid injection port of the battery core simultaneously in the same process.

[0027] It should be noted that the sealing performance test of the battery cell body described in this embodiment can be understood as the sealing performance test of the leakage-prone locations such as welding points and folds on the battery cell shell in addition to the battery cell liquid injection port.

[0028] Figure 1 The figure shows the axial side structure diagram of the integrated sealing detection device provided by the embodiment of the present utility model. Figure 2 Shown Figure 1 Schematic diagram of the top view of the integrated sealing detection device, Figure 3 Shown Figure 2 Schematic diagram of the cross-sectional structure in the III-III direction. Figures 1 to 3As shown, the integrated sealing detection device provided by the embodiment of the present invention includes an upper shell 10, a lower shell 20 and a liquid injection port detection head 30. The upper shell 10 and the lower shell 20 are combined into a receiving cavity for accommodating the battery cell 40. The liquid injection port detection head 30 can be arranged on the upper shell 10 so as to move up and down along its own axial direction, and is used to abut against the battery cell liquid injection port 41. When the upper shell 10 is combined with the lower shell 20, and the liquid injection port detection head 30 abuts against the battery cell liquid injection port 41, a first sealed space 51 is formed between the upper shell 10 and the lower shell 20, and a second sealed space 52 independent of the first sealed space 51 is formed between the liquid injection port detection head 30 and the battery cell liquid injection port 41. In other words, after the liquid injection port detection head 30 is combined with the battery cell liquid injection port 41, it re-cuts an independent second sealed space 52 from the first sealed space 51. The first sealed space 51 and the second sealed space 52 are respectively connected to a leak detection gas detection sensor (not shown).

[0029] In this embodiment, the structural arrangement of the upper housing 10, lower housing 20, and liquid injection port detection head 30 directly forms two independent sealed spaces within the device: the battery cell body is disposed within a first sealed space 51, and the battery cell liquid injection port 41 is disposed within a second sealed space 52. After injecting a leak detection gas into the battery cell liquid injection port 41, leak detection gas sensors connected to each sealed space can detect the leak detection gas, such as helium, in both spaces. This allows the sealing performance of both the battery cell body and the liquid injection port of the battery cell 40 to be tested simultaneously in the same process.

[0030] Figure 4 The figure shows the axial side structure diagram of the upper shell. Figure 5 The figure shows the axial structure diagram when the battery cell is installed in the lower shell. Figure 6 The figure shows the axial structure of the injection port detection head. Figures 3 to 6 In this embodiment, a vacuum joint 11, a detection joint 12 and an inflation joint 13 are also provided on the upper shell 10. When the upper shell 10 and the lower shell 20 are combined, the vacuum joint 11, the detection joint 12 and the inflation joint 13 are all connected to the first sealed space 51.

[0031] Through the vacuum joint 11, the exhaust pipe can evacuate the first sealed space 51. Through the detection joint 12, the first sealed space 51 can be evacuated after a set time to detect the content of the leak detection gas. Through the inflation joint 13, the first sealed space 51 can be vacuum-broken to facilitate the separation of the lower shell 20 and the upper shell 10.

[0032] It is understandable that the liquid injection port detection head 30 itself can complete the operations of vacuuming, leak detection and vacuum breaking in the second sealed space 52. The liquid injection port detection head 30 itself can be existing technology and will not be described in detail here.

[0033] The liquid injection port detection head 30 can be fixed to the upper surface of the upper shell 10 via a support 31. The liquid injection port detection head 30 passes through the upper shell 10 and extends downward. A telescopic cylinder (not shown) is also provided on the support 31 to control the vertical movement of the liquid injection port detection head 30 relative to the upper shell 10.

[0034] A through-hole is formed in the top of the upper housing 10. A first sealing ring 32 is provided on the liquid inlet detection head 30. The liquid inlet detection head 30 extends into the through-hole, so that the first sealing ring 32 is sandwiched between the liquid inlet detection head 30 and the inner wall of the through-hole. This arrangement ensures that the liquid inlet detection head 30 can move relative to the upper housing 10 while maintaining a seal when the upper housing 10 and lower housing 20 are combined.

[0035] The width of the bottom of the support 31 is greater than the width of the through hole. A second sealing ring 33 is provided at the bottom of the support 31. The second sealing ring 33 is provided between the bottom of the support 31 and the top of the upper shell 10 to further enhance the sealing performance.

[0036] The lower housing 20 is provided with a plurality of first grooves 21, each of which can accommodate a battery cell 40. The upper housing 10 is provided with a plurality of second grooves 14 corresponding to the first grooves 21. When the lower housing 20 is combined with the upper housing 10, each first groove 21 will combine with a second groove 14 to form a first sealed space 51.

[0037] A third sealing ring 22 is further provided between the upper end surface of the first groove 21 and the lower end surface of the second groove 14 to ensure the sealing performance of the first sealed space 51 .

[0038] Figure 7 The figure shows the structure diagram of the lower shell being arranged on the lifting device. Figure 7 As shown, the integrated seal detection device also includes a lifting device 60, which includes a cylinder 61, a push rod 62, and a support plate 63. The cylinder 61 is fixed to a stationary component of the integrated seal detection device, such as a support frame. One end of the push rod 62 is connected to the cylinder 61, and the other end is connected to the support plate 63. The cylinder 61 drives the push rod 62 to move up and down along the axis of the push rod 62. The support plate 63 is used to support the lower housing 20.

[0039] When the support plate 63 drives the lower housing 20 to move upward, the lower housing 20 is combined with the upper housing 10 to form an accommodating cavity.

[0040] In summary, in this embodiment, the structural arrangement of the upper shell 10, lower shell 20, and liquid injection port detection head 30 allows two independent sealed spaces to be directly formed within the device: the battery cell body is disposed within the first sealed space 51, and the battery cell liquid injection port 41 is disposed within the second sealed space 52. After injecting a leak detection gas into the battery cell liquid injection port 41, leak detection gas sensors connected to each sealed space can detect the leak detection gas, such as helium, in both spaces. This allows the sealing performance of both the battery cell body and the liquid injection port of the battery cell 40 to be tested simultaneously in the same process, reducing costs.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An integrated seal detection device, characterized in that: It includes an upper shell, a lower shell and a liquid filling port detection head. The upper shell and the lower shell are combined into a accommodating cavity for accommodating the battery cell. The liquid filling port detection head can be arranged on the shell so as to be movable up and down along its own axial direction, and is used to abut against the battery cell liquid filling port. When the upper shell is combined with the lower shell and the liquid filling port detection head abuts against the battery cell liquid filling port, a first sealed space is formed between the upper shell and the lower shell, and an independent second sealed space is formed between the liquid filling port detection head and the battery cell liquid filling port. The first sealed space and the second sealed space are respectively connected to a leak detection gas detection sensor.

2. The integrated seal detection device according to claim 1, characterized in that: The upper shell is also provided with a vacuum joint for evacuating the first sealed space, a detection joint for detecting gas leaks in the first sealed space, and an inflation joint for breaking the vacuum in the first sealed space.

3. The integrated seal detection device according to claim 1, characterized in that: The liquid filling port detection head is fixed to the upper surface of the upper shell through a support. A through hole is formed on the top of the upper shell. The liquid filling port detection head passes through the through hole and extends downward.

4. The integrated seal detection device according to claim 3, characterized in that: A first sealing ring is formed between the liquid injection port detection head and the side wall of the through hole.

5. The integrated seal detection device according to claim 3, characterized in that: The width of the bottom of the support is greater than the width of the through hole. A second sealing ring is provided at the bottom of the support, and the second sealing ring is provided between the bottom of the support and the top of the upper shell.

6. The integrated seal detection device according to claim 3, characterized in that: The support is also provided with a telescopic cylinder for driving the liquid filling port detection head to move up and down relative to the upper shell.

7. The integrated seal detection device according to claim 1, characterized in that: A plurality of first grooves are provided in the lower shell, and a plurality of second grooves corresponding to the first grooves are provided in the upper shell. When the lower shell is combined with the upper shell, each of the first grooves and a second groove encloses the sealed space.

8. The integrated seal detection device according to claim 1, characterized in that: The integrated sealing detection device also includes a lifting device, which includes a cylinder, a push rod and a support plate. The cylinder is fixed on the stationary part of the integrated sealing detection device, one end of the push rod is connected to the cylinder, and the other end is connected to the support plate. The cylinder drives the push rod to move up and down along the axis of the push rod, and the support plate is used to support the lower shell.

9. The integrated seal detection device according to claim 7, characterized in that: A third sealing ring is provided between the upper end surface of the first groove and the lower end surface of the second groove.

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