A sealing detection device

Abstract

The utility model provides a sealing detection device, including: a mounting frame, a first sealing platform, and a second sealing platform; the first sealing platform and the second sealing platform are respectively constructed with a first vacuum chamber and a second vacuum chamber, and a helium device and a helium detector respectively connected to the first vacuum chamber and the second vacuum chamber; a driving unit for driving the second sealing platform to perform vertical lifting movement is configured on the top of the mounting frame, and the driving unit drives the second sealing platform to move downward vertically to clamp the battery pole piece between the second sealing platform and the first sealing platform, and seal the first vacuum chamber and the second vacuum chamber, and the helium device injects helium into the first vacuum chamber, and if there is a defective battery pole piece, the helium enters the second vacuum chamber through the defective battery pole piece to be detected by the helium detector. The present application realizes the accurate detection of battery pole pieces with tiny leakage points, avoiding affecting the quality of batteries using such negative pole pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece detection, in particular to a sealing detection device. Background Art

[0002] In the production process of batteries, battery electrodes need to go through multiple key processes. One typical battery negative electrode electrode is composed of a copper layer, a PC layer, an aluminum layer, a plastic layer, and a copper layer arranged from bottom to top, and each layer is tightly connected by rivets. In order to ensure the quality of batteries using this type of negative electrode electrode, after the assembly and riveting of the battery negative electrode electrode, it is necessary to test the sealing of the joints between the various material layers of the negative electrode electrode and the rivets to ensure that the battery can effectively isolate the external environment under normal use conditions, prevent moisture and impurities from entering, and avoid short circuits or other failures.

[0003] However, although the battery sealing detection device in the prior art can detect obvious leakage points of the battery pole piece, it is not accurate enough to detect tiny leakage points, thereby affecting the quality of the battery using this negative pole piece.

[0004] In view of this, it is necessary to improve the battery sealing detection device in the prior art to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to disclose a sealing detection device for solving many defects of battery sealing detection devices in the prior art, especially for accurately detecting battery pole pieces with tiny leakage points to avoid affecting the quality of batteries using such negative pole pieces.

[0006] To achieve the above object, the utility model provides a sealing detection device, comprising: a mounting frame, a first sealing platform configured on the mounting frame and used to carry a plurality of battery pole pieces, and a second sealing platform vertically arranged above the first sealing platform;

[0007] The first sealing platform and the second sealing platform are respectively constructed with a first vacuum chamber and a second vacuum chamber, and a helium device and a helium detector respectively connected to the first vacuum chamber and the second vacuum chamber;

[0008] A driving unit for driving the second sealing platform to move up and down vertically is disposed on the top of the mounting frame. The driving unit drives the second sealing platform to move downward vertically to clamp the battery electrode sheet between the second sealing platform and the first sealing platform, and seal the first vacuum chamber and the second vacuum chamber. The helium device injects helium into the first vacuum chamber. If there are defective battery electrodes, the helium enters the second vacuum chamber through the defective battery electrodes to be detected by the helium detector.

[0009] As a further improvement of the present invention, the first sealing platform is provided with a plurality of positioning blocks for carrying the battery pole pieces in the transverse direction, the positioning blocks are configured with positioning grooves for clamping the battery pole pieces, and the second sealing platform is provided with an annular sealing gasket which is arranged in a one-to-one correspondence with the positioning blocks in the vertical direction;

[0010] The driving unit drives the second sealing platform to move downward vertically to clamp the battery electrode between the positioning block and the annular sealing gasket. A leak detection cavity connected to the second vacuum cavity is formed between the annular sealing gasket and the battery electrode. The positioning block is constructed with a first vent hole connected to the first vacuum cavity and the positioning groove.

[0011] As a further improvement of the present invention, the second sealing platform is embedded with a positioning rod which vertically penetrates the annular sealing gasket. When the battery electrode is clamped between the positioning block and the annular sealing gasket, the positioning rod is pressed against the surface of the battery electrode.

[0012] As a further improvement of the present invention, the first sealing platform is constructed with a second vent hole connecting the first vacuum chamber and the first vent hole, and the second sealing platform is constructed with a leak detection hole connecting the second vacuum chamber and the leak detection chamber.

[0013] As a further improvement of the utility model, the annular sealing gasket extends radially outward to form an extension portion, and the second sealing platform is configured to vertically support the extension portion upward so that the extension portion is tightly against a locking frame of the second sealing platform, and the locking frame is connected to the second sealing platform by bolts.

[0014] As a further improvement of the present invention, the first sealing platform is provided with a limiting rod which vertically and continuously penetrates the positioning block and the positioning hole formed by the battery electrode, and the annular sealing gasket is constructed with an avoidance hole for the limiting rod to partially extend into.

[0015] As a further improvement of the present invention, the driving unit comprises: a driving cylinder, a driving shaft of the driving cylinder is connected to the second sealing platform via a first flange to drive the second sealing platform to perform lifting movement in the vertical direction.

[0016] As a further improvement of the present invention, guide rods are arranged at the tops of both ends of the second sealing platform in the horizontal direction, and the guide rods vertically penetrate the top of the mounting frame. A second flange is arranged between the guide rods and the mounting frame to synchronously drive the guide rods to move when the second sealing platform is lifted and lowered vertically, and the guide rods move up and down through the second flange.

[0017] As a further improvement of the utility model, a plurality of support blocks for supporting the first sealing platform are configured at the bottom of the mounting frame, the first sealing platform is configured with a plurality of vacuum joints connected to the first vacuum chamber, and the vacuum joints are connected to the helium device through connecting pipes; the second sealing platform is also configured with a vacuum joint connected to the helium detector.

[0018] As a further improvement of the present invention, a sealing ring is clamped between the positioning block and the first sealing platform, and the sealing ring is arranged on the outside of the first vent hole.

[0019] Compared with the prior art, the beneficial effect of the utility model is that the sealing detection device drives the second sealing platform to move downward in the vertical direction through the driving unit, so that the second sealing platform presses the battery electrode downward, thereby clamping and fixing the battery electrode between the second sealing platform and the first sealing platform, so as to achieve the sealing of the first vacuum chamber and the second vacuum chamber. The sealing detection device uses helium as a tracer gas and injects helium into the first vacuum chamber through the helium device. If there is at least one battery electrode with a tiny leakage point in the entire group of battery electrodes, the helium will enter the second vacuum chamber through the battery electrode with the tiny leakage point, and thus be detected by the helium detector, so that the helium detector can obtain the detection result that the group of battery electrodes is a defective product, so as to accurately detect the battery electrode with a tiny leakage point and avoid affecting the quality of the battery using this battery electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the sealing detection device disclosed by the utility model;

[0021] Figure 2 for Figure 1 A cross-sectional view shown by arrow AA;

[0022] Figure 3 for Figure 2 The enlarged image shown in the middle circle C;

[0023] Figure 4 for Figure 2 A cross-sectional view shown in the direction of arrow BB;

[0024] Figure 5 for Figure 4 Enlarged view shown at center circle D. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0026] It is particularly important to note that in the following embodiments, the term "lateral" refers to Figure 1 The term "vertical direction" means Figure 1 and Figure 2 The Z-axis is in the direction and is perpendicular to the horizontal direction.

[0027] Please refer to Figures 1 to 5 A specific implementation of a sealing detection device is disclosed.

[0028] Ginseng Figures 1 to 5 As shown, in this embodiment, the sealing detection device 1 includes: a mounting frame 11, a first sealing platform 12 configured on the mounting frame 11 and used to carry a plurality of battery electrodes 200, and a second sealing platform 13 vertically arranged above the first sealing platform 12; the first sealing platform 12 and the second sealing platform 13 are respectively constructed with a first vacuum chamber 121 and a second vacuum chamber 131, and a helium device (not shown) and a helium detector (not shown) respectively connected to the first vacuum chamber 121 and the second vacuum chamber 131; the mounting frame 11 The top is configured with a driving unit 14 for driving the second sealing platform 13 to move up and down vertically. The driving unit 14 drives the second sealing platform 13 to move downward vertically to clamp the battery electrode 200 between the second sealing platform 13 and the first sealing platform 12, and seal the first vacuum chamber 121 and the second vacuum chamber 131. The helium device injects helium into the first vacuum chamber 121. If there are defective battery electrodes 200, the helium enters the second vacuum chamber 131 through the defective battery electrodes 200 to be detected by the helium detector.

[0029] Although the battery sealing detection device in the prior art can detect obvious leakage points of the battery electrode, it is not accurate enough for detecting tiny leakage points. Compared with the battery sealing detection device in the prior art, the sealing detection device 1 drives the second sealing platform 13 to move downward vertically through the driving unit 14, so that the second sealing platform 13 presses the battery electrode 200 downward, thereby clamping and fixing the battery electrode 200 between the second sealing platform 13 and the first sealing platform 12, and making the battery electrode 200 fit tightly with the first sealing platform 12 to achieve the sealing of the first vacuum chamber 121 and the second vacuum chamber 131. The sealing detection device 1 uses helium as a tracer gas and injects helium into the first vacuum chamber 121 through a helium device. If there is at least one tiny If there is a battery pole piece 200 with a tiny leakage point, helium will enter the second vacuum chamber 131 through the battery pole piece 200 with a tiny leakage point, so as to be detected by the helium detector, so that the helium detector can obtain a detection result that the group of battery pole pieces 200 is defective. If there is no battery pole piece 200 with a tiny leakage point in the whole group of battery pole pieces 200, helium will not be able to enter the second vacuum chamber 131 through the battery pole piece 200, so that the helium detector can obtain a detection result that the group of battery pole pieces 200 is good, so as to accurately detect the battery pole piece 200 with a tiny leakage point and avoid affecting the quality of the battery using such battery pole piece 200.

[0030] Specifically, in an actual production environment, the sealing detection device 1 detects multiple battery pole pieces 200 as a whole group. If a defective product appears in the whole group of battery pole pieces 200, the whole group of battery pole pieces 200 is regarded as a defective product, so as to reduce the misjudgment that may occur when detecting a single battery pole piece 200, thereby reducing the probability of a single battery pole piece 200 being misjudged as a good product, thereby reducing the false detection rate. In addition, the detection of the whole group of battery pole pieces 200 is completed in a relatively short time, thereby improving the detection efficiency.

[0031] Ginseng Figure 2 and Figure 3As shown, the first sealing platform 12 is equipped with a plurality of positioning blocks 122 for carrying the battery pole piece 200 in the horizontal direction, and the positioning blocks 122 are configured with positioning grooves 123 for clamping the battery pole piece 200. The second sealing platform 13 is equipped with an annular sealing gasket 132 arranged vertically in one-to-one correspondence with the positioning blocks 122; the positioning blocks 122 are used to carry the battery pole piece 200, and the positioning grooves 123 ensure that the battery pole piece 200 is accurately positioned. The driving unit 14 drives the second sealing platform 13 to move downward in the vertical direction to clamp the battery pole piece 200 between the positioning blocks 122 and the annular sealing gasket 132. A leak detection cavity 133 communicating with the second vacuum cavity 131 is formed between the annular sealing gasket 132 and the battery pole piece 200, and the positioning block 122 is configured with a first vent 124 communicating with the first vacuum cavity 121 and the positioning groove 123. The driving unit 14 drives the second sealing platform 13 to move downward, and the annular sealing gasket 132 on the second sealing platform 13 is in close contact with the battery pole piece 200, forming a seal between the first vacuum chamber 121 and the second vacuum chamber 131. Subsequently, the helium device injects helium into the first vacuum chamber 121, and ensures that the helium can smoothly enter the battery pole piece 200 in the positioning groove 123 through the first vent hole 124. If there is a small leak point in the battery pole piece 200, the helium will enter the leak detection chamber 133 through the leak point, and further enter the second vacuum chamber 131, and be detected by the helium detector to obtain the detection result that the group of battery pole pieces 200 is a defective product. On the contrary, if there is no leak point in the entire group of battery pole pieces 200, the helium will not be able to enter the second vacuum chamber 131 through the battery pole piece 200, and the detection result that the group of battery pole pieces 200 is a good product is obtained.

[0032] Ginseng Figure 4 and Figure 5 As shown, the second sealing platform 13 is embedded with a positioning rod 134 that vertically penetrates the annular sealing gasket 132. When the battery pole piece 200 is clamped between the positioning block 122 and the annular sealing gasket 132, the positioning rod 134 abuts against the surface of the battery pole piece 200. In order to ensure the stability and accuracy of the battery pole piece 200 during the detection process, the second sealing platform 13 is embedded with a positioning rod 134. The positioning rod 134 vertically penetrates the annular sealing gasket 132. When the driving cylinder 141 drives the second sealing platform 13 to move vertically downward, the positioning rod 134 is driven to move synchronously, so that when the battery pole piece 200 is clamped between the positioning block 122 and the annular sealing gasket 132, the positioning rod 134 abuts against the surface of the battery pole piece 200 synchronously, so that the battery pole piece 200 remains stable during the detection process, and the battery pole piece 200 is prevented from moving or offsetting during the detection process, thereby ensuring the accuracy of the detection result.

[0033] Ginseng Figure 3As shown, the first sealing platform 12 is constructed with a second vent hole 127 connecting the first vacuum chamber 121 and the first vent hole 124, and the second sealing platform 13 is constructed with a leak detection hole 135 connecting the second vacuum chamber 131 and the leak detection chamber 133. The second vent hole 127 is used to connect the first vacuum chamber 121 and the first vent hole 124, ensuring that the helium in the first vacuum chamber 121 can smoothly enter the battery electrode 200 in the positioning groove 123. The leak detection hole 135 is used to connect the second vacuum chamber 131 and the leak detection chamber 133. If there is a small leak point in the battery electrode 200, the helium will enter the leak detection chamber 133 through the leak point, and the helium in the leak detection chamber 133 can enter the second vacuum chamber 131 through the leak detection hole 135, so that the leak point can be detected by the helium detector.

[0034] Ginseng Figure 3 and Figure 5 As shown, the annular sealing gasket 132 extends radially outward to form an extension portion 1321, and the second sealing platform 13 is configured with a locking frame 136 that abuts against the extension portion 1321 vertically upward to make the extension portion 1321 close to the second sealing platform 13, and the locking frame 136 is connected to the second sealing platform 13 by bolts. The extension portion 1321 formed by the annular sealing gasket 132 extending radially outward is used to increase the surface area in contact with the second sealing platform 13, thereby improving the sealing performance. The locking frame 136 is connected to the second sealing platform 13 by bolts and abuts against the extension portion 1321 vertically upward to ensure that the extension portion 1321 is close to the second sealing platform 13, thereby achieving the fixing of the annular sealing gasket 132 to the second sealing platform 13, and ensuring the sealing between the second sealing platform 13 and the annular sealing gasket 132.

[0035] Ginseng Figure 5 As shown, the first sealing platform 12 is provided with a limiting rod 129 which vertically and continuously penetrates the positioning hole 201 opened by the positioning block 122 and the battery pole piece 200, and the annular sealing gasket 132 is constructed with an avoidance hole 1322 for the limiting rod 129 to partially extend into. The limiting rod 129 vertically and continuously penetrates the positioning hole 201 opened by the positioning block 122 and the battery pole piece 200 to ensure that the battery pole piece 200 remains stable during the detection process and prevents it from moving or deflecting during the detection process. The avoidance hole 1322 on the annular sealing gasket 132 is used for the limiting rod 129 to partially extend into, ensuring that the limiting rod 129 does not hinder the descending movement of the second sealing platform 13, while ensuring the smooth cooperation between the annular sealing gasket 132 and the limiting rod 129.

[0036] Ginseng Figure 1 and Figure 2As shown, the driving unit 14 includes: a driving cylinder 141, and a driving shaft 142 of the driving cylinder 141 is connected to the second sealing platform 13 through a first flange 143 to drive the second sealing platform 13 to move up and down vertically. A plurality of driving cylinders 141 are arranged side by side in the horizontal direction, and the plurality of driving cylinders 141 simultaneously drive the second sealing platform 13 to move up and down vertically. The first flange 143 is used to connect the driving shaft 142 of the driving cylinder 141 to the second sealing platform 13 to ensure that the driving shaft 142 can stably drive the second sealing platform 13 to move up and down vertically. The first flange 143 is configured as a welding flange or a bolted flange, which is used to firmly connect the two components together.

[0037] Ginseng Figure 1 and Figure 2 As shown, guide rods 112 are arranged at the tops of both ends of the second sealing platform 13 in the horizontal direction. The guide rods 112 penetrate the top of the mounting frame 11 in the vertical direction. A second flange 113 is arranged between the guide rods 112 and the mounting frame 11 to synchronously drive the guide rods 112 to move when the second sealing platform 13 is lifted and lowered in the vertical direction. The guide rods 112 move up and down through the second flanges 113. The guide rods 112 can play a guiding role to ensure that the second sealing platform 13 remains stable during the lifting process to avoid deviation or shaking. The combination of the guide rods 112 and the second flanges 113 ensures that the second sealing platform 13 can be lifted and lowered vertically stably under the drive of the driving cylinder 141. The second flange 113 is configured as a sliding flange or a guide flange, so that the guide rods 112 can allow a certain displacement in the vertical direction to ensure that the second sealing platform 13 is stably lifted and lowered in the vertical direction.

[0038] Ginseng Figure 1 and Figure 2 As shown, the bottom of the mounting frame 11 is provided with a plurality of support blocks 111 for supporting the first sealing platform 12. The first sealing platform 12 is provided with a plurality of vacuum joints 125 connected to the first vacuum chamber 121. The vacuum joints 125 are connected to a helium device (not shown) through a connecting pipe 126, so that the helium device can inject helium into the first vacuum chamber 121 through the connecting pipe 126 and the vacuum joints 125, and the helium can be evenly distributed in the first vacuum chamber 121 through the plurality of vacuum joints 125, thereby improving the detection speed. The second sealing platform 13 is also provided with a vacuum joint 125a connected to a helium detector (not shown).

[0039] Ginseng Figure 3 As shown, a sealing ring 128 is clamped between the positioning block 122 and the first sealing platform 12, and the sealing ring 128 is arranged around the outside of the first vent hole 124. The sealing ring 128 ensures that the first vacuum chamber 121 is isolated from the outside, prevents helium leakage in the first vacuum chamber 121, and ensures that the pressure in the first vacuum chamber 121 is stable during the detection process, thereby improving the accuracy of the detection.

[0040] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sealing detection device, characterized in that: include: A mounting frame, a first sealing platform configured on the mounting frame and used to carry a plurality of battery pole pieces, and a second sealing platform vertically arranged above the first sealing platform; The first sealing platform and the second sealing platform are respectively constructed with a first vacuum chamber and a second vacuum chamber, and a helium device and a helium detector respectively connected to the first vacuum chamber and the second vacuum chamber; A driving unit for driving the second sealing platform to move up and down vertically is disposed on the top of the mounting frame. The driving unit drives the second sealing platform to move downward vertically to clamp the battery electrode sheet between the second sealing platform and the first sealing platform, and seal the first vacuum chamber and the second vacuum chamber. The helium device injects helium into the first vacuum chamber. If there are defective battery electrodes, the helium enters the second vacuum chamber through the defective battery electrodes to be detected by the helium detector.

2. The sealing detection device according to claim 1, characterized in that: The first sealing platform is provided with a plurality of positioning blocks for carrying the battery pole pieces in the transverse direction, the positioning blocks are configured with positioning grooves for clamping the battery pole pieces, and the second sealing platform is provided with annular sealing gaskets arranged in a one-to-one correspondence with the positioning blocks in the vertical direction; The driving unit drives the second sealing platform to move downward vertically to clamp the battery electrode between the positioning block and the annular sealing gasket. A leak detection cavity connected to the second vacuum cavity is formed between the annular sealing gasket and the battery electrode. The positioning block is constructed with a first vent hole connected to the first vacuum cavity and the positioning groove.

3. The sealing detection device according to claim 2, characterized in that: The second sealing platform is embedded with a positioning rod which vertically penetrates the annular sealing gasket. When the battery pole piece is clamped between the positioning block and the annular sealing gasket, the positioning rod abuts against the surface of the battery pole piece.

4. The sealing detection device according to claim 2, characterized in that: The first sealing platform is configured to form a second vent hole connecting the first vacuum chamber and the first vent hole, and the second sealing platform is configured to form a leak detection hole connecting the second vacuum chamber and the leak detection chamber.

5. The sealing detection device according to claim 2, characterized in that: The annular sealing gasket extends radially outward to form an extension portion, and the second sealing platform is configured to vertically abut against the extension portion to make the extension portion close to the locking frame of the second sealing platform, and the locking frame is connected to the second sealing platform by bolts.

6. The sealing detection device according to claim 2, characterized in that: The first sealing platform is provided with a limiting rod which vertically and continuously penetrates the positioning block and the positioning hole formed by the battery pole piece, and the annular sealing gasket is constructed with an avoidance hole for the limiting rod to partially extend into.

7. The sealing detection device according to claim 1, characterized in that: The driving unit comprises: a driving cylinder, a driving shaft of the driving cylinder is connected to the second sealing platform through a first flange to drive the second sealing platform to perform lifting movement in the vertical direction.

8. The sealing detection device according to claim 1, characterized in that: The second sealing platform is provided with guide rods at both ends of the top in the horizontal direction, and the guide rods vertically penetrate the top of the mounting frame. A second flange is provided between the guide rods and the mounting frame to synchronously drive the guide rods to move when the second sealing platform is lifted and lowered in the vertical direction, and the guide rods move up and down through the second flanges.

9. The sealing detection device according to claim 1, characterized in that: The bottom of the mounting frame is provided with a plurality of support blocks for supporting the first sealing platform. The first sealing platform is provided with a plurality of vacuum joints connected to the first vacuum chamber. The vacuum joints are connected to the helium device through connecting pipes. The second sealing platform is also provided with a vacuum joint connected to the helium detector.

10. The sealing detection device according to claim 2, characterized in that: A sealing ring is clamped between the positioning block and the first sealing platform, and the sealing ring is arranged outside the first vent hole.

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