Detection device

Abstract

The utility model discloses a detection device, which comprises a fixing jig and a connecting piece, and is characterized in that the fixing jig is used for fixing a battery; the connecting piece is arranged on one side of the fixing jig and is used for communicating a liquid injection hole in the battery with an external gas injection instrument; the connecting piece is provided with a communicating hole and a sealing surface, and the sealing surface is used for tightly abutting against the side wall of the battery or the hole wall of the liquid injection hole; one end of the communicating hole is communicated with the liquid injection hole, and the other end of the communicating hole is communicated with an external gas injection instrument. According to the utility model, by arranging the fixing jig, the battery is fixed through the fixing jig, and the connecting piece is communicated with the liquid injection hole in the battery, so that detection gas is injected into the battery through the connecting piece for detection. Due to the fact that the sealing face is arranged on the connecting piece, the contact area of the connecting piece and the battery can be increased, the sealing effect of the connecting piece and the battery can be guaranteed in the vacuumizing and inflating process, the end face, provided with the liquid injection hole, of the battery can be prevented from being damaged, and the welding process and quality of the sealing nail are prevented from being affected.

Description

Technical Field

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

[0002] In modern battery manufacturing, particularly in the production of power batteries and consumer electronics, methods for inspecting the weld quality of battery casings and covers are crucial. Traditionally, this inspection involves evacuating the battery's injection port and then injecting helium to check for leaks. This method requires the end face of the injection port to withstand sufficient force to support the helium injection cylinder and prevent gas leakage, while also maintaining the shape of the port. Deformation of the port can affect the visual positioning and welding accuracy of the subsequent sealing pins.

[0003] However, with the significant improvement in manufacturing technology in recent years, the design of steel-cased batteries has increasingly tended to use thinner materials to increase energy density while ensuring safety performance. For 3C consumer batteries, the market has strict requirements on battery size and weight. To meet these requirements while maintaining an energy density comparable to that of soft-pack batteries, the shell and cover thickness of steel-cased batteries are designed to be very thin, typically between 0.1 and 1 mm. Due to the thin material, the end face of the injection hole cannot provide sufficient support, resulting in the injection hole being easily deformed during the helium injection process, which in turn affects the welding process and quality of the sealing pin. Utility Model Content

[0004] The embodiment of the present utility model provides a detection device to solve the problem that the existing detection device is prone to damage the end surface of the battery injection hole during the helium injection process.

[0005] Specifically, the utility model provides a detection device, including a fixing jig and a connecting piece, wherein the fixing jig is used to fix the battery; the connecting piece is arranged on one side of the fixing jig, and is used to connect the liquid injection hole on the battery with the external gas injection instrument; the connecting piece has a connecting hole and a sealing surface, and the sealing surface is used to tightly abut against the side wall of the battery or the hole wall of the liquid injection hole; one end of the connecting hole is connected to the liquid injection hole, and the other end of the connecting hole is connected to the external gas injection instrument.

[0006] Optionally, the connecting member includes a supporting body and an elastic body arranged on the supporting body, the elastic body is elastically deformable, and the connecting hole is opened on the elastic body.

[0007] Optionally, the support body is arranged at one end of the elastomer, the diameter of the other end of the elastomer is smaller than the diameter of the injection hole, and the diameter of the elastomer increases along the direction of the injection hole pointing to the support body; the sealing surface is the side of the elastomer facing the injection hole.

[0008] Optionally, a groove is provided on the support body, the elastomer is provided in the groove, the depth of the groove is less than the length of the elastomer, so that the elastomer extends out of the groove at one end away from the bottom of the groove; the sealing surface is a side of the support body on which the groove is provided.

[0009] Optionally, the ratio of the area of ​​the sealing surface to the cross-sectional area of ​​the groove is greater than 2.

[0010] Optionally, the support body is a hard structural member so as to be in close contact with the side wall of the battery under pressure.

[0011] Optionally, an adsorption portion is provided on one end of the support body facing the battery to adsorb the support body onto the battery.

[0012] Optionally, the adsorption portion is a magnetic attraction structure or a negative pressure adsorption structure arranged around the groove.

[0013] Optionally, the fixing fixture is provided with a fixing groove and a detection port, the fixing groove is used to place the battery; the detection port is located on the side of the fixing groove and is connected to the internal space of the fixing groove and the notch of the fixing groove.

[0014] Optionally, the length of the support body is greater than the length of the detection port.

[0015] The beneficial effects of the present invention are:

[0016] The detection device provided by the present invention includes a fixture for securing the battery and connecting a connector to the liquid injection hole on the battery, allowing for injection of a detection gas into the battery for detection. The sealing surface provided on the connector increases the contact area between the connector and the battery, thereby ensuring a seal between the connector and the battery during vacuuming and inflation while also preventing damage to the battery end face with the liquid injection hole, thereby preventing any impact on the welding process and quality of the sealing pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic structural diagram of a detection device in one embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of a detection device in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a detection device in one embodiment of the present invention;

[0021] Figure 4 It is a schematic principle diagram of a detection device in one embodiment of the present utility model.

[0022] In the figure: 100, fixing fixture, 110, fixing groove, 120, detection port, 200, connecting piece, 201, sealing surface, 202, connecting hole, 210, supporting body, 211, groove, 212, adsorption part, 220, elastic body, 300, battery, 310, liquid injection hole. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary, such as by glue injection between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0026] Figure 1 This is a schematic structural diagram of a detection device in one embodiment of the present invention. Figure 1 As shown, and reference Figures 2 to 4An embodiment of the utility model provides a detection device, characterized in that it includes a fixing fixture 100 and a connecting member 200, wherein the fixing fixture 100 is used to fix the battery 300; the connecting member 200 is arranged on one side of the fixing fixture 100, and is used to connect the liquid injection hole 310 on the battery 300 with an external gas injection instrument; the connecting member 200 has a connecting hole 202 and a sealing surface 201, and the sealing surface 201 is used to tightly abut against the side wall of the battery 300 or the hole wall of the liquid injection hole 310; one end of the connecting hole 202 is connected to the liquid injection hole 310, and the other end of the connecting hole 202 is connected to the external gas injection instrument.

[0027] In the embodiment of the present invention, a fixing fixture 100 is provided to secure the battery 300, and the connector 200 is connected to the injection hole 310 on the battery 300, so that a test gas can be injected into the battery 300 through the connector 200 for testing. The sealing surface 201 provided on the connector 200 increases the contact area between the connector 200 and the battery 300, thereby ensuring a seal between the connector 200 and the battery 300 during vacuuming and inflation, while also preventing damage to the end face of the battery 300 provided with the injection hole 310, thereby preventing any impact on the welding process and quality of the sealing pin.

[0028] Specifically, the gas injection instrument is used to inject helium or other detection gases into the battery 300 .

[0029] like Figures 2 to 4 As shown, in one embodiment of the present invention, the connector 200 includes a support body 210 and an elastic body 220 disposed on the support body 210. The elastic body 220 is elastically deformable, and the communication hole 202 is formed on the elastic body 220. During testing, the elastic body 220 is in close contact with the battery 300, and the elastic body 220 undergoes elastic deformation, which can increase the contact area between the elastic body 220 and the battery 300 and improve the sealing effect.

[0030] like Figure 2 As shown, in one embodiment of the present invention, the support body 210 is disposed at one end of the elastic body 220. The diameter of the other end of the elastic body 220 is smaller than the diameter of the liquid injection hole 310, and the diameter of the elastic body 220 increases along the direction from the liquid injection hole 310 to the support body 210. The sealing surface 201 is the side of the elastic body 220 facing the liquid injection hole 310. In this embodiment, the elastic body 220 has a conical structure. During testing, the tip of the conical elastic body 220 is inserted into the liquid injection hole 310, and the elastic body 220 is deformed by compression, thereby tightly connecting the elastic body 220 and the liquid injection hole 310 to prevent leakage of the test gas.

[0031] like Figure 3 As shown, in an alternative embodiment of the present invention, the support body 210 is provided with a groove 211, and the elastic body 220 is disposed within the groove 211. The depth of the groove 211 is less than the length of the elastic body 220, so that the end of the elastic body 220 away from the bottom of the groove 211 extends out of the groove 211; the sealing surface 201 is the surface of the support body 210 provided with the groove 211. This arrangement ensures that the support body 210 is only used to support the battery 300, while the elastic body 220 located in the groove 211 is connected to the injection hole 310. Therefore, the elastic deformation of the elastic body 220 can increase the contact area between the elastic body 220 and the battery 300, thereby improving the sealing effect, thereby ensuring helium injection sealing without damaging the injection hole 310.

[0032] In one embodiment of the present invention, the support body 210 is a hard structural member that is tightly abutted against the sidewall of the battery 300 under pressure. Furthermore, the ratio of the area of ​​the sealing surface 201 to the cross-sectional area of ​​the groove 211 is greater than 2 to ensure that the support body 210 does not damage the battery 300 when tightly abutted against the battery 300.

[0033] like Figure 4 As shown, in an alternative embodiment of the present invention, the end of the support body 210 facing the battery 300 is provided with an adsorption portion 212 to adsorb the support body 210 onto the battery 300. This configuration enables the support body 210 to provide a seal when adsorbed onto the battery 300, while the elastic deformation of the elastic body 220 further enhances the sealing effect.

[0034] Specifically, the adsorption portion 212 is a magnetic attraction structure or a negative pressure adsorption structure disposed around the groove 211. The magnetic attraction structure is easy to operate and facilitates adjustment of the adsorption position; the negative pressure adsorption structure provides a good sealing effect between the adsorption portion 212 and the battery 300 due to its negative pressure adsorption effect.

[0035] In one embodiment of the present invention, the fixing fixture 100 is provided with a fixing groove 110 and a detection port 120. The fixing groove 110 is used to place the battery 300. The detection port 120 is located on the side of the fixing groove 110 and is connected to the internal space of the fixing groove 110 and the notch of the fixing groove 110. During use, the battery 300 is placed into the fixing groove 110 through the notch of the fixing groove 110. The side of the battery 300 with the injection hole 310 is on the same side as the side of the fixing fixture 100 with the detection port 120. The side of the battery 300 with the injection hole 310 extends out of the fixing groove 110, or the side of the battery 300 with the injection hole 310 is on the same plane as the outer side of the fixing fixture 100 with the detection port 120, so that the connecting hole 202 of the connector 200 abuts and connects with the injection hole 310.

[0036] In one embodiment of the present invention, the length of the support body 210 is greater than the length of the detection port 120 so that the end surface of the fixing fixture 100 acts as a stopper to prevent the support body 210 from crushing the battery 300 during detection.

[0037] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A detection device, characterized in that: The invention comprises a fixing jig (100) and a connecting piece (200), wherein the fixing jig (100) is used to fix a battery (300); the connecting piece (200) is arranged on one side of the fixing jig (100) and is used to connect a liquid injection hole (310) on the battery (300) with an external gas injection instrument; the connecting piece (200) has a connecting hole (202) and a sealing surface (201), wherein the sealing surface (201) is used to tightly abut against a side wall of the battery (300) or a hole wall of the liquid injection hole (310); one end of the connecting hole (202) is connected to the liquid injection hole (310), and the other end of the connecting hole (202) is connected to an external gas injection instrument.

2. The detection device according to claim 1, characterized in that The connecting member (200) comprises a support body (210) and an elastic body (220) arranged on the support body (210); the elastic body (220) is elastically deformable, and the connecting hole (202) is provided on the elastic body (220).

3. The detection device according to claim 2, characterized in that The support body (210) is arranged at one end of the elastic body (220); the diameter of the other end of the elastic body (220) is smaller than the diameter of the injection hole (310), and the diameter of the elastic body (220) increases along the direction from the injection hole (310) to the support body (210); and the sealing surface (201) is the side of the elastic body (220) facing the injection hole (310).

4. The detection device according to claim 2, characterized in that A groove (211) is provided on the support body (210), and the elastic body (220) is provided in the groove (211). The depth of the groove (211) is less than the length of the elastic body (220), so that an end of the elastic body (220) away from the bottom of the groove (211) extends out of the groove (211); the sealing surface (201) is a surface of the support body (210) on which the groove (211) is provided.

5. The detection device according to claim 4, characterized in that The ratio of the area of ​​the sealing surface (201) to the cross-sectional area of ​​the groove (211) is greater than 2.

6. The detection device according to claim 4, characterized in that The support body (210) is a hard structural member, and is in close contact with the side wall of the battery (300) under pressure.

7. The detection device according to claim 4, characterized in that An adsorption portion (212) is provided at one end of the support body (210) facing the battery (300) so as to adsorb the support body (210) onto the battery (300).

8. The detection device according to claim 7, characterized in that The adsorption portion (212) is a magnetic attraction structure or a negative pressure adsorption structure arranged around the groove (211).

9. The detection device according to claim 2, characterized in that: The fixing fixture (100) is provided with a fixing groove (110) and a detection port (120); the fixing groove (110) is used to place the battery (300); the detection port (120) is located on the side of the fixing groove (110) and is communicated with the internal space of the fixing groove (110) and the notch of the fixing groove (110).

10. The detection device according to claim 9, characterized in that: The length of the support body (210) is greater than the length of the detection port (120).

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