Battery cell shell voltage withstanding test tool

Abstract

The utility model relates to the technical field of tools, in particular to a voltage withstanding test tool for a battery cell shell. Comprising a base, a first clamp and a second clamp are arranged on the base, one side of the first clamp and one side of the second clamp are hinged, and the other side of the first clamp and the other side of the second clamp are detachably connected. The first clamp and the second clamp are each provided with a pressure bearing surface used for supporting the outer side of the horn mouth, a fastening surface used for clamping the outer side of a battery cell shell and a first cavity used for containing the battery cell shell, a second cavity is formed below the first cavity, and a supporting ring is arranged in the second cavity; a lifting plate driven by a lifting driving device is further connected to the base in a sliding mode, a pressing head is arranged on the bottom face of the lifting plate, a concave table is arranged on the bottom face of the pressing head, an air inlet pipe communicated with the concave table is arranged on one side of the pressing head, an inserting cylinder is arranged at the lower end of the pressing head, and a pressing face is arranged above the inserting cylinder. The sealing device is convenient to use and high in sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and in particular to a pressure resistance test tooling for battery cell casings. Background Technology

[0002] The cell casing pressure resistance test is mainly used to evaluate whether the cell casing can maintain structural integrity under extreme working conditions and to determine whether the cell casing can withstand the predetermined maximum pressure. Patent application number 202323400752.0 discloses a round shell double-channel withstand pressure test fixture, including a first positioning plate and a second positioning plate for clamping and positioning an aluminum shell body. The aluminum shell body is located between the first positioning plate and the second positioning plate. A driving component is provided on one side of the second positioning plate, which can drive the second positioning plate to move closer to the first positioning plate, thereby cooperating with the first positioning plate to clamp and position the aluminum shell body. A clamping mechanism for clamping the aluminum shell body is symmetrically arranged on the top of the aluminum shell body. A moving mechanism for driving the aluminum shell body to perform horizontal displacement is provided on the top of the clamping mechanism. This solves the problems of existing lithium battery shell withstand pressure test devices, where the positioning of the aluminum shell requires manual alignment, which is not only inefficient but also prone to inaccurate positioning of the aluminum shell, causing leakage during the aluminum shell testing process and affecting the pressure test effect. However, when placing the aluminum shell into the clamping mechanism, it is necessary to insert the aluminum shell from bottom to top and maintain this posture until the clamping mechanism clamps it, which is relatively troublesome. Figure 5 The image shows a common aluminum battery cell casing 8, which is cylindrical with an opening at the top. The opening has a flared mouth 81. This application provides a test fixture for the battery cell casing 8. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery cell casing withstand voltage test fixture in response to the above-mentioned technical deficiencies.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a battery cell casing withstand voltage test fixture, including a base, on which a first clamp and a second clamp are provided, with one side of the two clamps hinged together and the other side detachably connected. The first clamp is fixed on the base. Both the first clamp and the second clamp are provided with a pressure-bearing surface for supporting the outer side of the flared mouth, a fastening surface for clamping the outer side of the battery cell casing, and a first cavity for accommodating the battery cell casing. A second cavity is provided below the first cavity, and a support ring is provided in the second cavity. A lifting plate driven by a lifting drive device is also slidably connected to the base. A pressure head is provided on the bottom surface of the lifting plate. A recess is provided on the bottom surface of the pressure head. An air inlet pipe communicating with the recess is provided on one side of the pressure head. An insert is provided at the lower end of the pressure head, and a pressing surface is provided above the insert.

[0005] To further optimize this technical solution, ear plates are provided on one side of both the first and second clamps, and pin holes are provided on the ear plates, with the pins passing through all the pin holes simultaneously.

[0006] To further optimize this technical solution, the first clamp is provided with a threaded hole on the side away from the pin, and the second clamp is provided with a stepped hole on the side away from the pin.

[0007] To further optimize this technical solution, a vent hole is provided on one side of the first cavity.

[0008] To further optimize this technical solution, the lifting drive device is a cylinder.

[0009] Compared with the prior art, the present invention has the following advantages: the first clamp is fixed on the base, one side of the second clamp is hinged to one side of the first clamp and the other side of both are detachably connected, the first clamp and the second clamp are both provided with a pressure bearing surface, a fastening surface and a first cavity, a second cavity is provided below the first cavity and a support ring is provided in the second cavity, so that when installing the battery cell shell, it is only necessary to place it in the correct position and then release it, which is more convenient and the sealing reliability is higher. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a battery cell casing withstand voltage test fixture.

[0011] Figure 2 for Figure 1 A magnified view of point I in the middle.

[0012] Figure 3 This is a schematic diagram of the pressure head.

[0013] Figure 4 This is a schematic diagram of the structure of the first clamp and the second clamp.

[0014] Figure 5 This is a schematic diagram of the battery cell casing.

[0015] In the diagram: 1. Base; 2. Lifting plate; 3. Lifting drive device; 4. Pressure head; 41. Air inlet pipe; 42. Recessed platform; 43. Pressing surface; 44. Insert cylinder; 5. First clamp; 51. Pressure bearing surface; 52. Fastening surface; 53. First cavity; 54. Second cavity; 6. Support ring; 7. Second clamp; 8. Battery cell housing; 81. Horn mouth. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0017] Detailed implementation method: combined with Figure 1-5 As shown, a battery cell casing withstand voltage testing fixture includes a base 1. A first clamp 5 and a second clamp 7 are mounted on the base 1, with one side hinged to each other and the other side detachably connected to allow for fixing or opening as needed. The first clamp 5 is fixed to the base 1. To facilitate rotation of the second clamp 7, its bottom surface is approximately 0.5 mm from the upper surface of the base 1. Both the first clamp 5 and the second clamp 7 are provided with a pressure-bearing surface 51 for supporting the outer side of the flared opening 81, a fastening surface 52 for clamping the outer side of the battery cell casing 8, and a first cavity 53 for accommodating the battery cell casing 8. The pressure-bearing surface 51 corresponds to the outer side of the flared opening 81. The radius of the fastening surface 52 is equal to the outer diameter of the battery cell casing 8. The diameter of the first cavity 53 is larger than the outer diameter of the battery cell casing 8. A second cavity 54 is located below the first cavity 53, with a diameter equal to or slightly larger than the outer diameter of the battery cell casing 8. A support ring 6 is provided in the second cavity 54. The support ring 6 is fixed on the first clamp 5. The distance from the top surface of the support ring 6 to the top of the fastening surface 52 is equal to or slightly greater than the distance from the bottom of the flared mouth 81 to the bottom surface of the cell housing 8. A lifting plate 2 driven by a lifting drive device 3 is also slidably connected to the base 1. A pressure head 4 is provided on the bottom surface of the lifting plate 2. A recess 42 is provided on the bottom surface of the pressure head 4. An air inlet pipe 41 communicating with the recess 42 is provided on one side of the pressure head 4. The air inlet pipe 41 is connected to the compressed air pipe of the withstand voltage test equipment (this application is a tooling used to match the withstand voltage test equipment, which can fill the cell housing 8 with gas at a set pressure). A tube 44 is provided at the lower end of the pressure head 4. The outer diameter of the tube 44 is equal to or slightly smaller than the inner diameter of the cell housing 8. A pressing surface 43 is provided above the tube 44. The pressing surface 43 corresponds to the upper side of the flared mouth 81.

[0018] Specifically, the first clamp 5 and the second clamp 7 are provided with ear plates on one side, and the ear plates are provided with pin holes. The pins pass through all the pin holes at the same time, thereby hinged the first clamp 5 and the second clamp 7 together.

[0019] Specifically, the base 1 is provided with multiple guide columns, and the lifting plate 2 is provided with multiple guide holes that cooperate with the guide columns.

[0020] Specifically, the first clamp 5 has a threaded hole on the side away from the pin, and the second clamp 7 has a stepped hole on the side away from the pin. A bolt can be passed through the stepped hole and connected to the threaded hole to achieve a detachable connection between the first clamp 5 and the second clamp 7 on that side.

[0021] Furthermore, a vent is provided on one side of the first cavity 53. During testing, the vent enhances the ventilation performance between the first cavity 53 of this tooling and the outside world.

[0022] Preferably, the lifting drive device 3 is a cylinder, and the end of the piston rod of the cylinder is connected to the top surface of the lifting plate 2.

[0023] When using, combine Figure 1 As shown, first, place the battery cell casing 8 on the support ring 6 with the flared end 81 facing upwards, and the outer side of the battery cell casing 8 close to the fastening surface 52 on the first clamp 5. Then, join the second clamp 7 with the first clamp 5, and tighten the right sides of both with bolts. At this time, the outer side of the flared end 81 contacts the pressure-bearing surface 51. Then, operate the pressure head 4 to descend, insert the insert 44 into the battery cell casing 8, and press the pressing surface 43 against the inner side of the flared end 81. Since the battery cell casing 8 is made of aluminum, which is relatively soft, a seal can be achieved between the pressing surface 43 and the inner side of the flared end 81 under pressure. Then, the withstand voltage testing equipment can be operated to perform a withstand voltage test on the battery cell casing 8. After the test is completed, raise the pressure head 4, then loosen the bolts, and rotate the second clamp 7 to make it... Figure 1 As shown in the diagram, the battery cell housing 8 can be removed. When mounting the battery cell housing 8, this test fixture only requires placing it in the correct position and then releasing it. After rotating the second clamp 7 and tightening the bolts, the battery cell housing 8 can be fixed in place, which is convenient and provides a high degree of sealing reliability.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cell shell pressure test tooling, comprising a base (1), characterized in that: The base (1) is provided with a first clamp (5) and a second clamp (7), and one side of the two is hinged, and the other side is detachably connected. The first clamp (5) is fixed on the base (1). The first clamp (5) and the second clamp (7) are both provided with a pressure bearing surface (51) for supporting the outside of the horn mouth (81), a fastening surface (52) for clamping the outside of the battery core shell (8), and a first cavity (53) for accommodating the battery core shell (8). A second cavity (54) is arranged below the first cavity (53), and a support ring (6) is arranged in the second cavity (54). The base (1) is further slidably connected with a lifting plate (2) driven by a lifting driving device (3). The bottom surface of the lifting plate (2) is provided with a pressure head (4). The bottom surface of the pressure head (4) is provided with a recess (42). One side of the pressure head (4) is provided with an air inlet pipe (41) in communication with the recess (42). The lower end of the pressure head (4) is provided with a plug cylinder (44). The upper side of the plug cylinder (44) is provided with a pressing surface (43).

2. The cell case pressure test tool of claim 1, wherein: One side of the first clamp (5) and the second clamp (7) is provided with an ear plate, and the ear plate is provided with a pin hole. The pin shaft passes through all the pin holes at the same time.

3. The cell case pressure test tool of claim 2, wherein: The side of the first clamp (5) away from the pin shaft is provided with a threaded hole. The side of the second clamp (7) away from the pin shaft is provided with a stepped hole.

4. The cell case pressure test tool of claim 1, wherein: One side of the first cavity (53) is provided with a ventilation hole.

5. The pressure test tooling for an electrochemical cell housing of any one of claims 1-4, wherein: The lifting driving device (3) is a gas cylinder.

Images