Device for detecting welding effect of all-tab battery shell and current collector

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a device for detecting the welding effect of a full-tab battery shell and a current collector, which comprises a clamping mechanism, a turnover mechanism and a detection mechanism, the clamping mechanism and the detection mechanism are both connected with a turnover part of the turnover mechanism, and when the clamping mechanism clamps a battery, the turnover part of the turnover mechanism is connected with the detection mechanism. A detection part of the detection mechanism is located at an opening of a shell of the battery clamped by the clamping mechanism, the turnover mechanism drives the detection mechanism, the clamping mechanism and the battery clamped by the clamping mechanism to turn over, and in the turnover process, the detection mechanism detects the position state of a current collector in the battery shell; the welding effect of the current collector and the battery shell is judged by detecting whether the current collector displaces or not.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a device for detecting the welding effect of a full-tab battery casing and current collector. Background Technology

[0002] The welding strength between the current collector and the casing of lithium-ion batteries is limited. In order to ensure product quality, it is necessary to test the welding effect of the current collector and the casing. The traditional test method is to judge by pulling the tabs. The drawback of the tab pulling test method is that it may damage the welding effect, cause damage to the solder joint, and affect the battery safety performance. Moreover, the traditional tab pulling test method is not suitable for testing the welding strength of all-tab batteries. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a device for testing the welding effect of the casing and current collector of a multi-tab battery, which is not only suitable for multi-tab batteries, but also will not damage the battery.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a device for detecting the welding effect of a full-tab battery casing and a current collector, comprising a clamping mechanism, a flipping mechanism, and a detection mechanism. The flipping part of the flipping mechanism is provided with a workpiece area and a detection area. The clamping mechanism is connected to the flipping part. The battery casing clamped by the clamping mechanism is in the workpiece area with the opening of the battery casing facing the detection area. The detection mechanism is connected to the flipping part and detects the positional change of the current collector inside the battery casing during the rotation driven by the flipping mechanism. After the clamping mechanism clamps the battery, the detection mechanism is at the opening of the battery casing. The flipping mechanism drives the battery to flip, and the detection mechanism detects whether the current collector has shifted relative to the battery casing, thereby judging the welding effect between the battery casing and the current collector.

[0005] As an optional technical solution of this utility model, the flipping mechanism drives the clamping mechanism and the detection mechanism to rotate between the workpiece loading / unloading position and the detection position. When the clamping mechanism and the detection mechanism are in the workpiece loading / unloading position, the detection area is above the workpiece area. When the clamping mechanism and the detection mechanism are in the detection position, the detection area is below the workpiece area.

[0006] As an optional technical solution of this utility model, the detection mechanism is a displacement sensor, and the detection part of the detection mechanism is in the detection area and located at the opening of the battery casing.

[0007] As an optional technical solution of this utility model, the clamping mechanism is a gripper cylinder.

[0008] As an optional technical solution of this utility model, the flipping mechanism is a flipping cylinder.

[0009] Compared with the prior art, the present invention has the following advantages: the device of the present invention can effectively detect the welding effect between the battery casing and the current collector, promptly detect products with poor welding, prevent products with poor welding from flowing out, improve the safety performance of the battery, and does not use the traditional method of pulling the tabs, so it will not damage the battery. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a structural diagram of the device of this utility model;

[0012] In the diagram: 1. Clamping mechanism, 2. Flipping mechanism, 3. Detection mechanism, 4. Battery casing. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0014] like Figure 1 As shown, a device for detecting the welding effect of a full-tab battery casing and current collector includes a clamping mechanism 1, a flipping mechanism 2 and a detection mechanism 3. The flipping mechanism 2 is a flipping cylinder or a flipping motor equipped with a flipping angle control system. The flipping shaft of the flipping mechanism 2 is horizontally placed, and the flipping part of the flipping mechanism 2 is provided with a working area and a detection area.

[0015] The clamping mechanism 1 is a clamping component suitable for clamping the battery housing 4. It can be a gripper cylinder or other forms of the prior art. The clamping mechanism 1 is connected to the flipping part of the flipping mechanism 2, and the clamping mechanism 1 and the battery housing 4 it clamps are driven to rotate by the flipping mechanism 2. When using the clamping mechanism 1 to clamp the battery housing 4, attention should be paid to the orientation of the opening of the battery housing 4 so that the opening of the battery housing 4 faces the detection area.

[0016] The detection mechanism 3 is connected to the flipping part. The detection part of the detection mechanism 3 is in the detection area. During the flipping process, the flipping mechanism 2 drives the clamping mechanism 1 and the battery casing 4 clamped by the clamping mechanism 1 to flip. The detection mechanism 3 detects the position change of the current collector inside the battery casing 4 through the opening of the battery casing 4. The welding effect between the battery casing 4 and the current collector is judged by detecting whether the current collector moves relative to the battery casing 4. If there is no relative displacement between the current collector and the battery casing 4, it indicates that the welding effect is good. If there is relative displacement between the current collector and the battery casing 4, it proves that the welding effect is not good and the product needs to be reworked.

[0017] The detection mechanism 3 is a displacement sensor. The detection part of the detection mechanism 3 is in the detection area, and when the clamping mechanism 1 clamps the battery casing 4, the detection part of the detection mechanism 3 is located at the opening of the battery casing 4.

[0018] The flipping mechanism 2 drives the clamping mechanism 1 and the detection mechanism 3 to rotate between the workpiece loading / unloading position and the detection position. When the clamping mechanism 1 and the detection mechanism 3 are in the workpiece loading / unloading position, the detection area is above the workpiece area. At this time, the battery casing 4 can be placed in the workpiece area with the opening facing upwards, and the clamping mechanism 1 can clamp the battery casing 4. When the clamping mechanism 1 and the detection mechanism 3 are in the detection position, the detection area is below the workpiece area. The clamping mechanism 1 and the detection mechanism 3 rotate from the workpiece loading / unloading position to the detection position, and the orientation of the battery changes, which is more conducive to the detection mechanism 3 detecting the welding effect of the battery casing 4 and the current collector.

[0019] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the welding effect of a full-tab battery casing and current collector, characterized in that: It includes a clamping mechanism (1), a flipping mechanism (2) and a detection mechanism (3). The flipping part of the flipping mechanism (2) is provided with a workpiece area and a detection area. The clamping mechanism (1) is connected to the flipping part. The battery housing (4) clamped by the clamping mechanism (1) is in the workpiece area and the opening of the battery housing (4) faces the detection area. The detection mechanism (3) is connected to the flipping part. The detection mechanism (3) detects the position change of the current collector inside the battery housing (4) during the rotation driven by the flipping mechanism (2).

2. The device for detecting the welding effect of a full-tab battery casing and current collector according to claim 1, characterized in that: The flipping mechanism (2) drives the clamping mechanism (1) and the detection mechanism (3) to rotate between the workpiece loading / unloading position and the detection position. When the clamping mechanism (1) and the detection mechanism (3) are in the workpiece loading / unloading position, the detection area is above the workpiece area. When the clamping mechanism (1) and the detection mechanism (3) are in the detection position, the detection area is below the workpiece area.

3. The device for detecting the welding effect of a full-tab battery casing and current collector according to claim 2, characterized in that: The detection mechanism (3) is a displacement sensor, and the detection part of the detection mechanism (3) is in the detection area and located at the opening of the battery casing (4).

4. The device for detecting the welding effect of a full-tab battery casing and current collector according to claim 2, characterized in that: The clamping mechanism (1) is a gripper cylinder.

5. The device for detecting the welding effect of a full-tab battery casing and current collector according to claim 2, characterized in that: The flipping mechanism (2) is a flipping cylinder.

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