Clamping device for overcurrent capability test
By designing a clamping device including an insulating base, a bracket, a conductive base and a lifting and lowering voltage conducting tightening body, the clamping is not firmly performed in the welding overcurrent capability test of the current collecting disk and steel shell in the prior art. The complex operation problem achieves more accurate and efficient test results.
Patent Information
- Application Number
- CN202420053980.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-09
AI Technical Summary
In the prior art, when testing the welded overcurrent capability of the current collecting disc and the steel shell in a lithium-ion cylindrical battery, the clamping device is not firm and complicated to operate, which increases the contact internal resistance and affects the test results.
A clamping device including an insulating base, a bracket, a conductive base and a voltage conducting tightening body is designed. The voltage conducting tightening body can be lifted and lowered and used to firmly clamp the steel shell and the current collecting plate, and is equipped with a pressure sensor for monitoring. Pressure magnitude.
It realizes the convenience of firm clamping and operation of the steel shell and the current collecting plate, reduces contact internal resistance, and improves the accuracy and efficiency of welding overcurrent capability testing.
Smart Images
Figure CN222189336U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of batteries, in particular to a clamping device used for testing the welding current capacity of a steel shell and a current collecting plate. Background Art
[0002] As we all know, lithium-ion cylindrical batteries are widely used due to their high energy density and large charge and discharge rate.
[0003] Among them, in lithium-ion cylindrical batteries, welding of the collector plate and the steel shell (pole) is determined by more and more manufacturers as the preferred direction of cylindrical battery structure, so it is very necessary to test the current carrying capacity of the welding of the collector plate and the steel shell.
[0004] At present, alligator clips are used in the test of the welding overcurrent capacity of the collector plate and the steel shell. Before using the alligator clips, the outer wall and the bottom of the steel shell are sawed open, and then the alligator clips are used to clamp the steel shell and the collector plate respectively. This will not clamp firmly and increase the contact internal resistance, thus affecting the overcurrent capacity judgment.
[0005] In addition, bolt clamping requires drilling holes in the steel shell and the collector plate in advance, welding them, sawing the outer wall and bottom of the steel shell, and then tightening the collector plate and the steel shell bolts to reduce contact internal resistance, but the operation is complicated.
[0006] In addition, no matter using alligator clips or bolts, when they are for pole-type steel shells, it is necessary to weld aluminum strips on the poles, and then use alligator clips or bolts to tighten them, which increases the internal resistance of the poles.
[0007] Therefore, a clamping device for current capacity testing is provided to overcome one or more of the above-mentioned drawbacks. Utility Model Content
[0008] The utility model aims to provide a clamping device for overcurrent capacity testing, which has the advantages of firm clamping and convenient operation.
[0009] To achieve the above-mentioned purpose, the clamping device for overcurrent capacity testing of the utility model comprises an insulating base, a bracket protruding upward from the insulating base, a conductive base arranged on the insulating base, and a conductive clamping body located directly above the conductive base. The conductive clamping body is assembled on the bracket, and the conductive clamping body can also move up and down to approach or move away from the conductive base, thereby correspondingly pressing or releasing the sample to be tested on the conductive base.
[0010] Compared with the prior art, with the aid of a conductive base arranged on an insulating base and a conductive tightening body located directly above the conductive base, the conductive tightening body is assembled on a bracket, and the conductive tightening body can also make a lifting movement close to or away from the conductive base; therefore, when testing the overcurrent capacity of the steel shell and the current collecting plate welding, the welded steel shell and the current collecting plate are placed on the conductive base, and the conductive base supports the steel shell and the current collecting plate from below; then, the conductive tightening body is moved downward, so that the steel shell and the current collecting plate are compressed from above by the conductive tightening body moving downward; therefore, the clamping device for overcurrent capacity testing of the utility model can firmly clamp the steel shell and the current collecting plate and is easy to operate when testing the overcurrent capacity of the steel shell and the current collecting plate welding.
[0011] Preferably, the clamping device for overcurrent capacity testing of the utility model further comprises a pressure sensor arranged between the conductive base and the insulating base.
[0012] Preferably, the insulating base is provided with a receiving cavity with an upward opening and a wiring channel connected to the receiving cavity, the wiring channel penetrates the insulating base from the side, the pressure sensor is located in the receiving cavity, and the conductive base is partially embedded in the receiving cavity.
[0013] Preferably, a supporting shaft structure protruding upward from the conductive base is provided at the center of the conductive base, and a lower pressing shaft structure protruding downward from the conductive tightening body is provided at the center of the conductive tightening body, and the axes of the supporting shaft structure and the lower pressing shaft structure coincide with each other.
[0014] Preferably, the lower pressure shaft structure is provided with an embedding installation groove for embedding the temperature sensor, and the embedding installation groove penetrates at least one side of the lower pressure shaft structure along the radial direction of the lower pressure shaft structure.
[0015] Preferably, the supporting shaft structure is provided with an embedding assembly groove for embedding the temperature sensor, and the embedding assembly groove penetrates at least one side of the supporting shaft structure along the radial direction of the supporting shaft structure.
[0016] Preferably, the insulating base comprises a base body and a metal counterweight block embedded in the base body, and the receiving cavity is formed on both the base body and the counterweight block.
[0017] Preferably, the counterweight block is a cast iron block.
[0018] Preferably, the conductive base is a copper base.
[0019] Preferably, the bracket has a supporting block located directly above the conductive base, the supporting block is provided with a threaded hole penetrating the supporting block vertically, and the conductive tightening body is a bolt passing through the supporting block from the threaded hole and threadedly connected to the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a stereoscopic diagram of a clamping device for testing the overflow capacity of the utility model.
[0021] Figure 2 yes Figure 1 Exploded perspective view of the clamping device used for current capacity testing.
[0022] Figure 3 yes Figure 1 Plan view along the direction indicated by arrow A.
[0023] Figure 4 is along Figure 3 Internal view of the section along the midline BB.
[0024] Figure 5 is along Figure 3 Internal view of the section taken along the mid-CC line.
[0025] Figure 6 yes Figure 1 The clamping device for the overcurrent capacity test is shown in the state when the supporting shaft structure of the conductive base supports the steel shell and the collecting plate welded together.
[0026] Figure 7 yes Figure 1 The clamping device used for overcurrent capacity testing is shown in the state diagram when the supporting shaft structure of the conductive base and the pressing shaft structure under the conductive clamping body jointly clamp the steel shell and the collecting plate. DETAILED DESCRIPTION
[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals represent like elements.
[0028] See also Figure 1 , Figure 6 and Figure 7 The clamping device 100 for current capacity test of the utility model is applied to the current capacity test of the welding of the steel shell 210 and the current collecting plate 220, and clamps the welded steel shell 210 and the current collecting plate 220 to meet the test needs.
[0029] Among them, the clamping device 100 of the utility model for overcurrent capacity testing includes an insulating base 10, a bracket 20 protruding upward from the insulating base 10, a conductive base 30 arranged on the insulating base 10, and a conductive clamping body 40 located directly above the conductive base 30; optionally, as an example, the bracket 20 and the insulating base 10 can be made into an integrated structure by an integrated molding method (such as but not limited to an injection molding method). Obviously, according to actual needs, the bracket 20 and the insulating base 10 can also be made separately, and then fixed together by an assembly method (such as but not limited to bonding, snap-fitting, using fasteners, etc.); when the bracket 20 and the insulating base 10 are manufactured separately, the bracket 20 at this time can be made of conductive material or insulating material, and it is best to use insulating material, because the overcurrent test may use tens to hundreds of amperes of current, which may be dangerous if exposed directly.
[0030] At the same time, the conductive tightening body 40 is assembled on the bracket 20, and the bracket 20 provides support for the conductive tightening body 40; the conductive tightening body 40 can also move up and down to approach or move away from the conductive base 30, thereby correspondingly pressing or releasing the steel shell 210 and the current collecting plate 220 supported by the conductive base 30; wherein, the pressing state of the conductive tightening body 40 on the steel shell 210 and the current collecting plate 220 supported by the conductive base 30 is shown in FIG. Figure 6 As shown, the conductive tightening body 40 is loosened from the steel shell 210 and the current collecting plate 220 supported by the conductive base 30. Figure 7 Specifically, combined Figure 4 and Figure 5 As an example, the clamping device 100 for overcurrent capacity testing of the utility model further includes a pressure sensor 50 disposed between the conductive base 30 and the insulating base 10, so as to transmit the pressure of the conductive clamping body 40 exerted on the steel shell 210 and the current collecting plate 220 by means of the pressure sensor 50, so as to facilitate the operator to monitor whether there is a pressure relief situation. More specifically, as follows:
[0031] like Figures 1 to 7 As shown, the bracket 20 has a supporting block 60 located directly above the conductive base 30. Optionally, the bracket 20 and the supporting block 60 can be made into an integral insulator. Obviously, they can also be made into two components. In addition, a threaded hole 61 is provided on the supporting block 60, which passes through the supporting block 60 from top to bottom. The conductive tightening body 40 is a bolt that passes through the supporting block 60 from the threaded hole 61 and is threadedly connected to the threaded hole 61. This design makes it easy for the operator to screw the conductive tightening body 40, that is, to achieve the lifting and lowering of the conductive tightening body 40. Therefore, the lifting and lowering operation of the conductive tightening body 40 is very convenient; in addition, the conductive tightening body 40 can still maintain the original force application state when the operator lets go. Specifically, Figures 1 to 7In the figure, as an example, there is a nut 62 inside the support block 60. This design avoids the trouble of machining the threaded hole 61 on the support block 60, so the manufacturing process is simplified. Obviously, in other embodiments, the nut 62 can be deleted. In this case, it is necessary to machine the threaded hole 61 on the support block 60. In addition, although the attached figure shows two threaded holes 61, it is obvious that the number of threaded holes 61 can also be three or four according to actual needs; wherein, one threaded hole 61 is used to tighten with the conductive clamping body 40, and the other is used to install the cable by threaded connection. It should be noted that when the nut 62 is provided, the nut 62 can be combined with the support block 60 by in-mold molding; of course, they can also be fixed together by assembly. In addition, the support block 60 and the bracket 20 can also be obtained by an integrated molding method to obtain an integrated structure. Obviously, according to actual needs, they can also be fixed together by assembly.
[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a supporting shaft structure 31 protruding upward from the conductive base 30 is provided at the center of the conductive base 30, so that the steel shell 210 and the current collecting plate 220 placed on the supporting shaft structure 31 are suspended on the conductive base 30 with the aid of the supporting shaft structure 31, so that the steel shell 210 and the current collecting plate 220 are not in contact with other positions of the conductive base 30 except the supporting shaft structure 31. A lower pressure shaft structure 41 protruding downward from the conductive tightening body 40 is provided at the center of the conductive tightening body 40, so as to prevent other positions of the conductive tightening body 40 except the lower pressure shaft structure 41 from contacting the steel shell 210 and the current collecting plate 220 respectively. The axes of the supporting shaft structure 31 and the lower pressure shaft structure 41 (i.e., those indicated by the label C1) coincide with each other, effectively ensuring the stability and reliability of the clamping of the steel shell 210 and the current collecting plate 220 by the supporting shaft structure 31 and the lower pressure shaft structure 41. Specifically, at Figure 1 and Figure 2 As an example, a buried assembly groove 311 for burying a temperature sensor is provided on the supporting shaft structure 31. The buried assembly groove 311 penetrates one side of the supporting shaft structure 31 along the radial direction of the supporting shaft structure 31. Obviously, according to actual needs, the buried assembly groove 311 can also penetrate the two opposite sides of the supporting shaft structure 31 along the radial direction of the supporting shaft structure 31. Such a design facilitates the buried installation of the temperature sensor in the supporting shaft structure 31, and ensures that the buried temperature sensor does not cause obstacles to the operation of the supporting shaft structure 31. It also facilitates the temperature detection of the temperature sensor buried in the supporting shaft structure 31, ensuring the accuracy of the detected temperature. In addition, Figure 5As an example, an embedded installation groove 411 for embedding the temperature sensor is opened on the lower pressure shaft structure 41, and the embedded installation groove 411 penetrates one side of the lower pressure shaft structure 41 along the radial direction of the lower pressure shaft structure 41. Obviously, according to actual needs, the embedded installation groove 411 can also penetrate the opposite sides of the lower pressure shaft structure 41 along the radial direction of the lower pressure shaft structure 41; such a design facilitates the embedded installation of the temperature sensor in the lower pressure shaft structure 41, and ensures that the embedded temperature sensor does not cause obstacles to the operation of the lower pressure shaft structure 41, and also facilitates the temperature detection of the temperature sensor embedded in the lower pressure shaft structure 41 to ensure the accuracy of the detected temperature.
[0033] like Figure 2 As shown, the insulating base 10 is provided with a receiving cavity 11 with a cavity opening 111 facing upward and a wiring channel 12 communicating with the receiving cavity 11. The wiring channel 12 penetrates the insulating base 10 from the side. The pressure sensor 50 is located in the receiving cavity 11. The conductive base 30 is partially embedded in the receiving cavity 11, that is, the conductive base 30 is not fully embedded in the receiving cavity 11. Figure 4 and Figure 5 As shown; this design makes the pressure sensor 50 and the conductive base 30 installed on the insulating base 10 more reliable. Figure 2 , Figure 4 and Figure 5 In the embodiment, as an example, the insulating base 10 includes a base body 10a and a metal counterweight 10b embedded in the base body 10a, so that the overall structure of the insulating base 10 is stable, which plays a role in stabilizing the clamping device 100 for overcurrent capacity testing of the entire utility model; in addition, the receiving cavity 11 is formed on both the base body 10a and the counterweight 10b. For example, the counterweight 10b is a cast iron block, which achieves the purpose of low cost and good counterweight effect; in addition, the conductive base 30 is a copper base, and the conductive base 30 has a lug 32 for connecting to the test line, so as to better transmit current during the test process. It should be noted that although the accompanying drawings divide the insulating base 10 into two parts, namely the base body 10a and the counterweight 10b, the insulating base 10 can also be made into one part according to actual needs. When it is made into one part, the insulation effect of the insulating base 10 must be guaranteed.
[0034] Compared with the prior art, with the aid of a conductive base 30 disposed on the insulating base 10 and a conductive tightening body 40 located directly above the conductive base 30, the conductive tightening body 40 is assembled on the bracket 20, and the conductive tightening body 40 can also make a lifting movement close to or away from the conductive base 30; therefore, when testing the welding overcurrent capacity of the steel shell 210 and the current collecting plate 220, the steel shell 210 and the current collecting plate 220 are placed on the conductive base 30, and the conductive base 30 supports the steel shell 210 and the current collecting plate 220 from below; then, the conductive tightening body 40 is moved downward, so that the steel shell 210 and the current collecting plate 220 are pressed from above by the conductive tightening body 40 moving downward; therefore, the clamping device 100 for overcurrent capacity testing of the utility model can firmly clamp the steel shell 210 and the current collecting plate 220 and is easy to operate when testing the welding overcurrent capacity of the steel shell 210 and the current collecting plate 220.
[0035] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.
Claims
1. A clamping device for current capacity testing, characterized in that: The device comprises an insulating base, a bracket protruding upward from the insulating base, a conductive base arranged on the insulating base, and a conductive tightening body located directly above the conductive base. The conductive tightening body is assembled on the bracket, and the conductive tightening body can also move up and down to approach or move away from the conductive base, thereby correspondingly pressing or releasing the sample to be tested on the conductive base.
2. The clamping device for current capacity testing according to claim 1, characterized in that: Also included is a pressure sensor disposed between the conductive base and the insulating base.
3. The clamping device for current capacity testing according to claim 2, characterized in that: The insulating base is provided with a receiving cavity with an upward opening and a wiring channel connected to the receiving cavity, the wiring channel penetrates the insulating base from the side, the pressure sensor is located in the receiving cavity, and the conductive base is partially embedded in the receiving cavity.
4. The clamping device for current capacity testing according to claim 1, characterized in that: A supporting shaft structure protruding upward from the conductive base is provided at the center of the conductive base, and a lower pressing shaft structure protruding downward from the conductive tightening body is provided at the center of the conductive tightening body, and the axes of the supporting shaft structure and the lower pressing shaft structure coincide with each other.
5. The clamping device for current capacity testing according to claim 4, characterized in that: The lower pressure shaft structure is provided with an embedding installation groove for embedding the temperature sensor, and the embedding installation groove penetrates at least one side of the lower pressure shaft structure along the radial direction of the lower pressure shaft structure.
6. The clamping device for current capacity testing according to claim 5, characterized in that: The supporting shaft structure is provided with an embedding assembly groove for embedding the temperature sensor, and the embedding assembly groove penetrates at least one side of the supporting shaft structure along the radial direction of the supporting shaft structure.
7. The clamping device for current capacity testing according to claim 3, characterized in that: The insulating base comprises a base body and a metal counterweight block embedded in the base body, and the receiving cavity is formed on both the base body and the counterweight block.
8. The clamping device for current capacity testing according to claim 7, characterized in that: The counterweight block is a cast iron block.
9. The clamping device for current capacity testing according to claim 1, characterized in that: The conductive base is a copper base.
10. The clamping device for current capacity testing according to claim 1, characterized in that: The bracket has a supporting block located directly above the conductive base, the supporting block is provided with a threaded hole penetrating the supporting block from top to bottom, and the conductive tightening body is a bolt that passes through the supporting block from the threaded hole and is threadedly connected to the threaded hole.