A pressurizing device for insulation testing

Abstract

The utility model discloses a kind of pressurizing device for insulation test, it is related to battery test technical field.It is used to pressurize cylindrical battery core for carrying out insulation test, comprising: clamp, cylindrical battery core is placed in clamp;Pressurizing component, the bottom end of pressurizing component is provided with pressurizing plate, pressurizing plate is contacted with the side of cylindrical battery core far from clamp and extrudes cylindrical battery core.The utility model discloses pressurizing device for insulation test provided by the present application, cylindrical battery core is pressurized by pressurizing component, so that the diaphragm of cylindrical battery core can be closely attached to positive and negative pole piece, guarantee the accuracy of subsequent insulation detection result.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and more specifically to a pressure device for insulation testing. Background Technology

[0002] During the cylindrical battery cell winding process, insulation testing is required to identify whether the produced cells have internal short circuits. Insulation testing can accurately eliminate cells with internal short circuits. However, insulation testing is performed on the cells in a free state. When there are foreign objects inside the cell, especially if they are small, the internal separator and the positive and negative electrode plates cannot make sufficient and effective contact. At the same time, the foreign objects cannot pierce the separator to form a short circuit, but can only form a micro-short circuit. In this case, the insulation test cannot detect the cell abnormality, resulting in the inability to accurately eliminate defective cells. This can easily lead to defective cells being transferred to subsequent processes for production, thereby causing safety problems such as spontaneous combustion and fire.

[0003] Therefore, how to provide a pressurization device that ensures sufficient and effective contact between the internal separator and the positive and negative electrode plates of the battery cell is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a pressurizing device for insulation testing, which ensures full contact between the internal diaphragm of the battery cell and the positive and negative electrode plates. To achieve the above objective, the present invention adopts the following technical solution:

[0005] This utility model provides a pressure-applying device for insulation testing, used to apply pressure to cylindrical battery cells undergoing insulation testing, comprising:

[0006] A clamp in which the cylindrical battery cell is placed;

[0007] A pressure-applying component, wherein a pressure plate is provided at the bottom end of the pressure-applying component, and the pressure plate contacts and squeezes the cylindrical battery cell on the side away from the clamp.

[0008] Furthermore, it also includes an insulation tester. The two ends of the pressure plate are respectively connected to a positive test piece and a negative test piece. The positive test piece is in contact with the positive electrode tab of the cylindrical battery cell, and the negative test piece is in contact with the negative electrode tab of the cylindrical battery cell. The two ends of the insulation tester are electrically connected to the positive test piece and the negative test piece through wires. The cylindrical battery cell, the positive test piece, the insulation tester, and the negative test piece are connected in sequence to form a test circuit.

[0009] Furthermore, the pressurizing component is a pressurizing cylinder, and the free end of the pressurizing cylinder is connected to the pressurizing plate.

[0010] Furthermore, the pressurizing cylinder and the pressurizing plate are connected by a connector.

[0011] Furthermore, the positive electrode test piece and the negative electrode test piece are fixed at both ends of the connector.

[0012] Furthermore, the positive electrode test piece and the negative electrode test piece are respectively connected to the connector via a fixing plate.

[0013] Furthermore, it also includes a protective cover, within which both the clamp and the pressure component are housed.

[0014] Furthermore, the protective cover is provided with ventilation openings.

[0015] Furthermore, both the pressure plate and the clamp are provided with grooves adapted to the cylindrical battery cell at their respective ends that are close to each other.

[0016] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a pressurizing device for insulation testing. The pressurizing component pressurizes the cylindrical battery cell, so that the diaphragm of the cylindrical battery cell can be tightly attached to the positive and negative electrode plates, ensuring the accuracy of subsequent insulation test results. Attached Figure Description

[0017] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A schematic diagram of the pressure device for insulation testing provided by this utility model;

[0019] Figure 2 Another structural schematic diagram of the pressurization device for insulation testing provided by this utility model;

[0020] Figure 3 This is another structural schematic diagram of the pressurization device for insulation testing provided by this utility model.

[0021] In the diagram: 1. Pressurizing cylinder; 2. Positive electrode test piece; 3. Fixture; 4. Clamp; 5. Pressurizing plate; 6. Connecting plate; 7. Protective cover; 8. Negative electrode test piece. Detailed Implementation

[0022] 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.

[0023] See Figure 1-3 This utility model discloses a pressurizing device for insulation testing, used to pressurize cylindrical battery cells undergoing insulation testing, comprising:

[0024] Clamp 4, the cylindrical battery cell is placed inside clamp 4;

[0025] The pressure component has a pressure plate 5 at its bottom end. The pressure plate 5 contacts and squeezes the cylindrical cell on the side away from the clamp 4.

[0026] In some embodiments, the device further includes an insulation tester. The two ends of the pressure plate 5 are respectively connected to a positive test piece 2 and a negative test piece 8. The positive test piece 2 is in contact with the positive electrode tab of the cylindrical battery cell, and the negative test piece 8 is in contact with the negative electrode tab of the cylindrical battery cell. The two ends of the insulation tester are electrically connected to the positive test piece 2 and the negative test piece 8 through wires. The cylindrical battery cell, the positive test piece 2, the insulation tester, and the negative test piece 8 are connected in sequence to form a test circuit.

[0027] The cylindrical battery cell to be tested is placed in the fixture 4. The pressurizing component is activated, which drives the pressure plate 5 to squeeze the cylindrical battery cell. At the same time, when the pressure plate 5 moves to the bottom, the positive electrode test piece 2 and the negative electrode test piece 8 contact the positive electrode tab and the negative electrode tab of the cylindrical battery cell, respectively. The positive electrode test piece 2 and the negative electrode test piece 8 are connected to the insulation tester through the wire. The insulation performance of the cylindrical battery cell is tested by the insulation tester.

[0028] In some embodiments, the pressurizing component is a pressurizing cylinder 1, and the free end of the pressurizing cylinder 1 is connected to the pressurizing plate 5.

[0029] The pressurizing cylinder 1 applies a thrust to the pressure plate 5, causing the pressure plate 5 to squeeze the cylindrical battery cell. This causes the positive and negative electrode plates inside the cylindrical battery cell to adhere tightly to the separator, enabling the insulation tester to detect micro-short circuits in the battery cell caused by tiny foreign objects inside the cell. This ensures the accuracy of the test results for the cylindrical battery cell and allows for the accurate removal of defective cylindrical battery cells.

[0030] In some embodiments, the pressurizing cylinder 1 and the pressurizing plate 5 are connected by a connector 6.

[0031] In some embodiments, the positive electrode test piece 2 and the negative electrode test piece 8 are fixed at both ends of the connector 6.

[0032] In some embodiments, the positive electrode test piece 2 and the negative electrode test piece 8 are respectively connected to the connector 6 via a fixing plate 3.

[0033] In some embodiments, a protective cover 7 is also included, and the clamp 4 and the pressure component are all disposed within the protective cover 7.

[0034] When performing insulation tests on cylindrical cells, the protective cover 7 prevents operators from accidentally touching the positive test piece 2 and the negative test piece 8, and also prevents operators from being mechanically injured during the test.

[0035] In some embodiments, the protective cover 7 is provided with ventilation openings.

[0036] In some embodiments, the pressure plate 5 and the clamp 4 are both provided with grooves adapted to the cylindrical battery cell at their close ends.

[0037] The groove on clamp 4 cooperates with the groove on pressure plate 5 to clamp the cylindrical battery cell, ensuring the clamping effect of the cylindrical battery cell, thereby ensuring the pressure effect of the cylindrical battery cell and ensuring the accuracy of the test results of the insulation tester.

[0038] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure-applying device for insulation testing, used to apply pressure to a cylindrical battery cell undergoing insulation testing, characterized in that, include: A clamp in which the cylindrical battery cell is placed; A pressure-applying component, wherein a pressure plate is provided at the bottom end of the pressure-applying component, and the pressure plate contacts and squeezes the cylindrical battery cell on the side away from the clamp.

2. The pressurizing device for insulation testing according to claim 1, characterized in that, It also includes an insulation tester. The two ends of the pressure plate are respectively connected to a positive test piece and a negative test piece. The positive test piece is in contact with the positive electrode tab of the cylindrical battery cell, and the negative test piece is in contact with the negative electrode tab of the cylindrical battery cell. The two ends of the insulation tester are electrically connected to the positive test piece and the negative test piece through wires. The cylindrical battery cell, the positive test piece, the insulation tester, and the negative test piece are connected in sequence to form a test circuit.

3. The pressurizing device for insulation testing according to claim 2, characterized in that, The pressurizing component is a pressurizing cylinder, and the free end of the pressurizing cylinder is connected to the pressurizing plate.

4. The pressurizing device for insulation testing according to claim 3, characterized in that, The pressurizing cylinder and the pressurizing plate are connected by a connector.

5. The pressurizing device for insulation testing according to claim 4, characterized in that, The positive electrode test piece and the negative electrode test piece are fixed at both ends of the connector.

6. The pressurizing device for insulation testing according to claim 5, characterized in that, The positive electrode test piece and the negative electrode test piece are respectively connected to the connector via a fixing plate.

7. The pressurizing device for insulation testing according to claim 1, characterized in that, It also includes a protective cover, and the clamps and pressure components are all housed inside the protective cover.

8. The pressurizing device for insulation testing according to claim 7, characterized in that, The protective cover is equipped with ventilation openings.

9. The pressurizing device for insulation testing according to claim 1, characterized in that, The pressure plate and the clamp are both provided with grooves at their respective ends that are close to each other, which are adapted to the cylindrical battery cell.

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