Integrated sealing detection system
By designing an integrated seal detection system, the sealing performance of the battery cell body and the liquid injection port can be detected at the same time at the same station, which solves the problem of long detection time in the prior art, improves production efficiency and reduces costs.
Patent Information
- Application Number
- CN202421939613.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, the time for detecting the sealing performance of the battery cell is long, resulting in low production efficiency.
An integrated seal detection system is designed, including a feeding station, a conveying line, a gas pumping station, a sealing performance detection station and a feeding station, which can detect the sealing performance of the battery cell body and the battery cell liquid injection port at the same time at the same station.
By simultaneously detecting the sealing performance of the battery cell body and the liquid injection port, the detection time is significantly shortened, the production efficiency is improved, and the detection cost is reduced.
Smart Images
Figure CN223050794U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cell sealing performance detection, and particularly relates to an integrated sealing detection system. Background Art
[0002] With the rapid development of new energy vehicles, people have higher and higher requirements for the sealing and protection performance of the power battery cells. In some fields, the sealing performance of the cells needs to meet the protection requirements of IP67 or even IP68.
[0003] In order to detect whether the sealing performance of the cell meets the requirements, generally, it is necessary to detect the sealing performance of the cell body and the liquid injection port of the cell.
[0004] In the prior art, the above two detections are generally carried out in two processes. That is, generally, the sealing performance of the cell body is detected first, and then leak detection gas, such as helium, is injected into the liquid injection port of the cell, and the sealing performance at the liquid injection port of the cell is detected.
[0005] However, adopting the above method, the detection time is relatively long, which is not conducive to improving production efficiency. Summary of the Utility Model
[0006] In order to solve the above technical problems, the utility model provides an integrated sealing detection system, which can detect the sealing performance of the cell body and the liquid injection port of the cell at the same station.
[0007] The utility model provides an integrated sealing detection system, including: a loading station, a conveyor line, an air injection station, a sealing performance detection station and an unloading station. The loading station is used for loading the cell into the lower shell body. The conveyor line is used for sequentially conveying the lower shell body between the loading station, the air injection station, the sealing performance detection station and the unloading station. The air injection station is used for injecting air into the liquid injection port of the cell. The sealing performance detection station is used for simultaneously detecting the sealing performance of the cell body and the liquid injection port of the cell. The unloading station is used for unloading the cell.
[0008] Further, the sealing performance detection station includes a liquid injection port detection head and an upper shell body. When performing the sealing performance detection, the lower shell body is combined with the upper shell body, and the liquid injection port detection head is combined with the liquid injection port of the cell, so that two independent sealing spaces are formed between the liquid injection port of the cell and the liquid injection port detection head, and between the upper shell body and the lower shell body.
[0009] Further, the sealing performance detection station further includes a lifting device for lifting the lower housing so that the lower housing is combined with the upper housing, and the liquid injection port detection head is disposed in the upper housing so as to be movable up and down along its own axis.
[0010] Further, when performing the sealing performance detection, a first sealing space is formed between the upper housing and the lower housing, and a second sealing space is formed between the liquid injection port detection head and the battery cell liquid injection port. Both the first sealing space and the second sealing space are respectively communicated with a leak detection gas detection probe through a detection pipeline.
[0011] Further, a vacuum pumping joint for vacuum pumping the first sealing space, a detection joint for detecting leak detection gas in the first sealing space, and an inflation joint for breaking the vacuum in the first sealing space are further provided on the upper housing.
[0012] Further, 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 system. One end of the push rod is connected to the cylinder, and the other end is connected to the support rod. 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 carry the lower housing.
[0013] Further, the gas filling station includes a lifting device and a gas filling head. The lifting device is used to lift the lower housing at the gas filling station on the conveyor line and abut the battery cell liquid injection port against the gas filling head.
[0014] Further, 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 system. One end of the push rod is connected to the cylinder, and the other end is connected to the support rod. 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 carry the lower housing.
[0015] Further, a notch is formed in the conveyor line at the support plate, the support plate is disposed in the notch, and the length of the support plate along the conveying direction of the conveyor line is less than the length of the lower housing along the length direction of the conveyor line.
[0016] Furthermore, a lifting device is provided at each air injection station. Each lifting device further includes a bottom plate and support rods. One end of the push rod away from the cylinder is connected to the bottom plate. The support rods are supported between the bottom plate and the support plate. A plurality of the support rods are distributed on both sides of the conveyor line. The distance between the support rods on both sides of the conveyor line is greater than the width of the lower shell. When the lower shell is lifted in place by the lifting device, the height of the bottom plate is flush with the conveyor line. The height between the support plate and the bottom plate is higher than the height of the battery cell in the lower shell.
[0017] In summary, in this embodiment, through the arrangement of the feeding station, the conveyor line, the air injection station, the sealing performance detection station, and the discharging station, the sealing performance detection of the battery cell can be completed automatically. By forming two sealing spaces simultaneously at the sealing performance detection station and detecting the sealing performance of the battery cell body and the battery cell liquid injection port respectively in the two sealing spaces, the sealing performance of the battery cell body and the battery cell liquid injection port can be detected simultaneously at the same station, improving the detection efficiency and reducing the cost.
[0018] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Shown is an isometric structural schematic diagram of an integrated sealing detection system provided by an embodiment of the present invention.
[0020] Figure 2 Shown as Figure 1 The isometric structural schematic diagram of the integrated sealing detection system without the box body in
[0021] Figure 3 Shown as Figure 2 The top view structural schematic diagram of the integrated sealing detection system in
[0022] Figure 4 Shown as Figure 2 The side view structural schematic diagram of the integrated sealing detection system when inflating the battery cell liquid injection port in
[0023] Figure 5 Shown is a schematic diagram of the lifting device at the air injection station.
[0024] Figure 6 Shown is the side view structural schematic diagram of the upper shell and the lower shell when they are not combined at the sealing performance detection station.
[0025] Figure 7 The figure shows a schematic side view structure when the upper shell and the lower shell are combined at the sealing performance detection station.
[0026] Figure 8 The figure shows a schematic axonometric structure of the entire sealing cavity after the upper shell and the lower shell are combined.
[0027] Figure 9 As shown in Figure 8 the schematic top view structure of the sealing cavity in
[0028] Figure 10 As shown in Figure 9 the schematic cross-sectional structure in the X-X direction in
[0029] Figure 11 The figure shows a schematic axonometric structure of the upper shell.
[0030] Figure 12 The figure shows a schematic axonometric structure when the battery cell is installed in the lower shell.
[0031] Figure 13 The figure shows a schematic axonometric structure of the liquid injection port detection head. Specific embodiments
[0032] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following is a detailed description in conjunction with the accompanying drawings and preferred embodiments.
[0033] The present utility model provides an integrated sealing detection system, which can detect the sealing performance of the battery cell body and the liquid injection port of the battery cell simultaneously at the same station.
[0034] It should be noted that the detection of the sealing performance of the battery cell body described in this embodiment can be understood as the detection of the sealing performance at the weld points, folding parts and other easily leaking positions on the battery cell shell except for the liquid injection port of the battery cell.
[0035] Figure 1 The figure shows a schematic axonometric structure of the integrated sealing detection system provided by the embodiment of the present utility model. Figure 2 As shown in Figure 1 the schematic axonometric structure of the integrated sealing detection system without the box body in Figure 3 As shown in Figure 2 the schematic top view structure of the integrated sealing detection system in Figures 1 to 3 As shown in
[0036] The loading station 10 is used to load the battery cell 60 into the lower housing 51. A first manipulator 11 is arranged at the loading station 10, and the first manipulator 11 can place the battery cell 60 on the battery cell transmission line 80 into the lower housing 51. In this embodiment, the lower housing 51 can act as a tray in the entire integrated sealing detection system.
[0037] The conveyor line sequentially conveys the lower housing 51 between the loading station 10, the air injection station 20, the sealing performance detection station 30 and the unloading station 40.
[0038] The air injection station 20 is used to inject air into the liquid injection port 61 of the battery cell (see Figure 10 ) to inject leak detection gas, such as helium, into the liquid outlet of the battery cell 60.
[0039] The sealing performance detection station 30 is used to detect the sealing performance of the battery cell body and the liquid injection port 61 of the battery cell simultaneously.
[0040] The unloading station 40 is used to unload the battery cell 60 from the lower housing 51. A second manipulator 41 is arranged at the unloading station 40, and the second manipulator 41 can take out the battery cell 60 from the lower housing 51 and place it back on the battery cell 60 transmission line so that the battery cell 60 transmission line can transfer the battery cell 60 to the next process.
[0041] A box is also arranged outside the entire system to protect the entire system.
[0042] Furthermore, the system can also be provided with a buffer station 70, and the buffer station 70 is located between the unloading station 40 and the sealing performance detection station 30 to buffer the normal battery cells 60.
[0043] Figure 4 Shown as Figure 2 the side view structural schematic diagram of the integrated sealing detection system when injecting air into the liquid injection port of the battery cell, Figure 5 shown as the schematic diagram of the lifting device of the air injection station. As Figure 4 and Figure 5 shown, in this embodiment, a lifting device 21 and an air injection head 22 are arranged at the air injection station 20, and the lifting device 21 is used to lift the lower housing 51 conveyed to the air injection station 20 and abut the liquid injection port 61 of the battery cell against the air injection head 22.
[0044] More specifically, in this embodiment, the lifting device 21 includes a cylinder 211, a push rod 212 and a support plate 213. The cylinder 211 is fixed to a stationary part of the integrated sealing detection system, such as a support frame. One end of the push rod 212 is connected to the cylinder 211, and the other end is connected to the support plate 213. The cylinder 211 drives the push rod 212 to move up and down along the axis of the push rod 212. The support plate 213 is used to carry the lower housing 51.
[0045] The structure of the air injection head 22 can be the same as that of the prior art, and will not be described in detail herein. As long as the structure and fixing method of the air injection head 22 can inject the leak detection gas into the electrolyte injection port 61 of the battery cell after the lifting device 21 lifts the lower housing 51.
[0046] When inflating, the air cylinder 211 drives the push rod 212 to move upward, the support plate 213 drives the lower housing 51 and makes the electrolyte injection port 61 of the battery cell abut against the air injection head 22, and the air injection head 22 injects the leak detection gas into the electrolyte injection port 61 of the battery cell to complete the inflation operation.
[0047] In this embodiment, in order to prevent the lifting of the support plate 213 from affecting the conveyor line, a notch (not shown in the figure) is formed in the conveyor line at the position of the support plate 213, and the support plate 213 is arranged in the notch. As Figure 5 shown, the length of the support plate 213 along the conveying direction of the conveyor line is less than the length of the lower housing 51 along the conveying direction of the conveyor line. That is, when the support plate 213 descends, in the conveying direction of the conveyor line, the combined action of the conveyor line upstream of the support plate 213 and the conveyor line downstream of the support plate 213 can drive the lower housing 51 to move into or out of the range of the support plate 213.
[0048] Furthermore, in this embodiment, in order to increase the production rhythm, each inflation station 20 is provided with a lifting device 21. Each lifting device 21 further includes a bottom plate 214 and a support rod 215. One end of the push rod 212 away from the air cylinder 211 is connected to the bottom plate 214, and the support rod 215 is supported between the bottom plate 214 and the support plate 213. A plurality of support rods 215 are distributed on both sides of the conveyor line. The distance between the support rods 215 on both sides of the conveyor line is greater than the width of the lower housing 51, that is, the length of the lower housing 51 in the direction perpendicular to the traveling direction of the conveyor line. When the lifting device 21 lifts the lower housing 51 in place, the height of the bottom plate 214 is flush with the conveyor line, and the height between the support plate 213 and the bottom plate 214 on the lifting device 21 is higher than the height of the battery cell 60 in the lower housing 51.
[0049] As Figure 4 shown, according to the above structure, when Figure 4 the lifting device 21 on the left inflation station 20 lifts the lower housing 51 for inflation, if Figure 4 the inflation on the right inflation station 20 has been completed and the support plate 213 has descended in place, the lower housing 51 on the Figure 4 right inflation station 20 can pass under the support plate 213 of the Figure 4 left inflation station 20 and enter the next station. Through the above structural arrangement, multiple inflation stations 20 can be set to increase the production rhythm.
[0050] Figure 6 Shown is a schematic side view structure of the upper shell and the lower shell when they are not combined at the sealing performance detection station, Figure 7 Shown is a schematic side view structure of the upper shell and the lower shell when they are combined at the sealing performance detection station, Figure 8 Shown is an axonometric structure schematic diagram of the entire sealing cavity after the upper shell and the lower shell are combined, Figure 9 Shown is Figure 8 a schematic top view structure of the sealing cavity in Figure 10 Shown is Figure 9 a schematic cross-sectional structure in the X-X direction in. Please continue to refer to Figures 6 to 10 , the sealing performance detection station 30 includes a lifting device 21, an upper shell 52 and a liquid injection port detection head 31. The lifting device 21 is used to lift the lower shell 51 and combine it with the upper shell 52 to form a sealing cavity between the upper shell 52 and the lower shell 51, and a first sealing space 53 is formed in the sealing cavity. The liquid injection port detection head 31 is arranged in the upper shell 52 so as to be movable up and down along its own axis, and abuts against the battery cell liquid injection port 61 when moving downward. When the upper shell 52 is combined with the lower shell 51 and the liquid injection port detection head 31 abuts against the battery cell liquid injection port 61, a sealing space independent of the space between the upper shell 52 and the lower shell 51 is formed between the liquid injection port detection head 31 and the battery cell liquid injection port 61.
[0051] That is to say, when the upper shell 52 is combined with the lower shell 51, a first sealing space 53 will be formed between the upper shell 52 and the lower shell 51, and when the liquid injection port detection head 31 moves downward and abuts against the battery cell liquid injection port 61, a second sealing space 54 that is not communicated with the first sealing space 53 will be additionally formed between the liquid injection port detection head 31 and the battery cell liquid injection port 61.
[0052] In other words, through the combination of the liquid injection port detection head 31 and the battery cell liquid injection port 61, a second sealing space 54 is additionally divided from the first sealing space 53.
[0053] A detection pipeline (not shown in the figure) for detecting the leak detection gas in the first sealing space 53 is provided on the upper shell 52. The detection pipeline can be communicated with a leak detection gas detection probe (not shown in the figure) to detect the content of the leak detection gas in the first sealing space 53.
[0054] It can be understood that a detection pipeline is also provided in the liquid injection port detection head 31, and the detection pipeline will also be communicated with another leak detection gas detection probe to detect the content of the leak detection gas in the second sealing space 54.
[0055] At this station, the leak detection gas detection probe connected to the first sealing space 53 can detect the sealing performance of the battery cell body; the leak detection gas detection probe connected to the second sealing space 54 can detect the sealing performance of the liquid injection port 61 of the battery cell.
[0056] Since at this station, the above-mentioned first sealing space 53 and second sealing space 54 are simultaneously formed after the lower housing 51 rises and the liquid injection port detection head 31 descends, and the detections are carried out simultaneously, therefore, at this station, the sealing performances of both the battery cell body and the liquid injection port 61 of the battery cell can be detected simultaneously.
[0057] Furthermore, in this embodiment, the structure and working principle of the lifting device 21 can be the same as those of the lifting device 21 at the air injection station 20, and will not be elaborated here.
[0058] Figure 11 Shown is the axonometric structure schematic diagram of the upper housing. Figure 12 Shown is the axonometric structure schematic diagram when the battery cell is installed in the lower housing. Figure 13 Shown is the axonometric structure schematic diagram of the liquid injection port detection head.
[0059] Please continue to refer to Figures 9 to 11 , in this embodiment, a vacuum extraction joint 521, a detection joint 522, and an inflation joint 523 are further provided on the upper housing 52. After the upper housing 52 is combined with the lower housing 51, the vacuum extraction joint 521, the detection joint 522, and the inflation joint 523 are all connected to the first sealing space 53.
[0060] Through the vacuum extraction joint 521, the suction pipe can extract vacuum from the first sealing space 53. After a set time, air can be extracted from the first sealing space 53 through the detection joint 522 to detect the content of the leak detection gas. Through the inflation joint 523, the first sealing space 53 can be broken vacuum to facilitate the separation of the lower housing 51 and the upper housing 52.
[0061] It can be understood that the liquid injection port detection head 31 itself can complete the operations of extracting vacuum, detecting leak detection gas, and breaking vacuum in the second sealing space 54. The liquid injection port detection head 31 itself can be an existing technology and will not be elaborated here.
[0062] Please continue to refer to Figures 8 to 11 and Figure 13 , the liquid injection port detection head 31 can be fixed on the upper surface of the upper housing 52 through the support 311. The liquid injection port detection head 31 passes through the upper housing 52 and extends downward. A telescopic cylinder is further provided on the support 311 to control the movement of the liquid injection port joint.
[0063] A through hole is formed on the upper side wall of the upper housing 52. A first sealing ring 312 is provided on the liquid injection port detection head 31. The liquid injection port detection head 31 extends into the through hole so that the first sealing ring 312 is clamped between the liquid injection port detection head 31 and the inner side wall of the through hole. Through the above arrangement, it is ensured that the liquid injection port detection head 31 can move relative to the upper housing 52 and the sealing performance after the upper housing 52 and the lower housing 51 are combined can be ensured.
[0064] The width of the bottom of the support 311 is greater than the width of the through hole 524. A second sealing ring 313 is provided at the bottom of the support 311. The second sealing ring 313 is arranged between the bottom of the support 311 and the top of the upper housing 52 to further increase the sealing performance.
[0065] Please continue to refer to Figures 10 to 12 , in this embodiment, a plurality of first grooves 511 are provided in the lower housing 51, and a battery cell 60 can be placed in each first groove 511, and a plurality of second grooves 525 corresponding to the first grooves 511 are provided in the upper housing 52. After the lower housing 51 and the upper housing 52 are combined, each first groove 511 will be combined with a second groove 525 to form a first sealing space 53.
[0066] A third sealing ring 55 is further provided between the end faces of the first groove 511 and the second groove 515 to ensure the sealing performance of the first sealing space 55.
[0067] In summary, in this embodiment, through the settings of the loading station 10, the conveyor line, the inflation station 20, the sealing performance detection station 30 and the unloading station 40, the sealing performance detection of the battery cell 60 can be automatically completed; by forming two sealing spaces simultaneously at the sealing performance detection station 30 and detecting the sealing performance of the battery cell body and the liquid injection port of the battery cell 61 in the two sealing spaces respectively, the sealing performance of the battery cell body and the liquid injection port of the battery cell 60 can be detected simultaneously at the same station, improving the detection efficiency and reducing the cost.
[0068] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to make equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. An integrated sealing detection system, characterized in that: It includes a loading station, a conveyor line, an air pumping station, a sealing performance testing station and a unloading station. The loading station is used to load the battery cells into the lower shell. The conveyor line is used to transfer the lower shell in sequence among the loading station, the air pumping station, the sealing performance testing station and the unloading station. The air pumping station is used to inflate the battery cell injection port; the sealing performance testing station is used to simultaneously test the sealing performance of the battery cell body and the battery cell injection port; the unloading station is used to unload the battery cells.
2. The integrated sealing detection system according to claim 1, characterized in that: The sealing performance testing station includes a liquid filling port detection head and an upper shell. When performing a sealing performance test, the lower shell is combined with the upper shell, and the liquid filling port detection head is combined with the battery cell liquid filling port, so that two independent sealed spaces are formed between the battery cell liquid filling port and the liquid filling port detection head, and between the upper shell and the lower shell.
3. The integrated sealing detection system according to claim 2, characterized in that: The sealing performance testing station also includes a lifting device, which is used to lift the lower shell to combine the lower shell with the upper shell. The liquid filling port detection head can be arranged in the upper shell so as to move up and down along its own axis.
4. The integrated sealing detection system according to claim 3, characterized in that: When performing sealing performance testing, a first sealed space is formed between the upper shell and the lower shell, and a 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 probe through a detection pipeline.
5. The integrated sealing detection system according to claim 4, 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 leakage in the first sealed space, and an inflation joint for breaking the vacuum in the first sealed space.
6. The integrated seal detection system according to claim 3, characterized in that: 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 system. 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.
7. The integrated seal detection system according to claim 1, characterized in that: The pumping station includes a lifting device and a pumping head. The lifting device is used to lift the lower shell of the pumping station of the conveyor channel and to place the battery cell injection port against the pumping head.
8. The integrated sealing detection system according to claim 7, characterized in that: 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 system. 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 sealing detection system according to claim 8, characterized in that: The conveying line forms a notch at the support plate, the support plate is arranged in the notch, and the length of the support plate along the conveying direction is smaller than the length of the lower shell along the length direction of the conveying line.
10. The integrated sealing detection system according to claim 9, characterized in that: Each of the pumping stations is provided with a lifting device, and each of the lifting devices also includes a base plate and a support rod. The end of the push rod away from the cylinder is connected to the base plate, and the support rod is supported between the base plate and the support plate. A plurality of support rods are distributed on both sides of the conveying line, and the distance between the support rods on both sides of the conveying line is greater than the width of the lower shell. When the lifting device lifts the lower shell into place, the height of the base plate is flush with the conveying line, and the height between the support plate and the base plate is higher than the height of the battery cell in the lower shell.