Cylindrical full-tab roll core short circuit test device
By designing a short-circuit testing device for cylindrical all-tab battery cores, and using a pressure and probe mechanism for stable clamping, the problem of short circuits and inaccurate testing caused by metal shavings was solved, and the stability and accuracy of battery core testing were achieved.
Patent Information
- Application Number
- CN202422200490.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the existing technology, cylindrical battery cores are prone to generating metal shavings during the flattening of all tabs or the flattening of multiple tabs, which can lead to short circuits or self-discharge. Furthermore, the lack of an effective pressurization device results in inaccurate test results or core deformation, affecting battery performance.
A short-circuit testing device for cylindrical omnipolar lug cores was designed. It employs a pressurization device and a probe mechanism, providing stable clamping force through a cylinder and an air bag. Positive and negative polarity tests are performed using probes, and gas pressure and voltage are controlled by a host computer to ensure test stability and accuracy.
This improves the stability and reliability of battery core testing, avoids short circuits caused by metal shavings, and ensures the accuracy of test results and the integrity of the core.
Smart Images
Figure CN223486146U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chip testing, and in particular to a short-circuit testing device for cylindrical omnipolar loop cores. Background Technology
[0002] Full tab flattening process: without cutting the tabs, after the core is wound into shape, the tabs are flattened into a flat end face by the flattening mechanism; multi-tab flattening process: the tabs are cut into multiple square tabs by laser welding, the tabs are pre-folded during the winding process, and the positive and negative tabs are flattened into a flat end face by the flattening mechanism.
[0003] Currently, most cylindrical battery cores are designed using a method of flattening all tabs or flattening multiple tabs. However, when flattening all tabs or cutting multiple tabs, metal shavings are easily generated. These metal shavings remain inside the cell, leading to problems such as short circuits or high self-discharge, which seriously affect battery performance. The Hi-pot test for cylindrical batteries lacks a pressure device, and poor adhesion between the positive and negative electrodes and the separator can result in inaccurate test results, failing to detect all defective cells. Some short-circuit test devices use rigid tooling for pressure application, but there is a deviation between the diameter of the produced core and the design value. Insufficient compatibility between the tooling and the core can cause the core to be squeezed and deformed, or even damage the electrodes.
[0004] Therefore, it is necessary to design a short-circuit testing device for cylindrical omnipolar lug cores to solve problems such as diaphragm damage, metal shavings, and metal burrs. To this end, we propose a short-circuit testing device for cylindrical omnipolar lug cores. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this invention provides a cylindrical omnipolar lug winding short-circuit testing device, solving the technical problems of chip testing.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A short-circuit testing device for a cylindrical omnipolar lug core, comprising:
[0010] The base has a pressure-applying device in its center, and testing mechanisms are located on either side of the pressure-applying device on top of the base.
[0011] The pressurization mechanism includes a sleeve, inside which is an air bag. Two pipes are connected to the top of the air bag, passing through the sleeve as an air outlet and an air inlet, respectively.
[0012] The testing mechanism includes a cylinder, a probe connector, and a push rod. The cylinder is fixedly installed on both sides of the base. The cylinder output end is provided with a push rod, which is pushed to extend and retract. The probe connector is installed at the end of the push rod.
[0013] Preferably, a positive probe is provided at the upper center of the probe connector, and a negative probe is provided at the center of the probe connector of another set of testing mechanisms. The positive and negative probes are disc-shaped, and the diameter of the disc is smaller than the diameter of the core.
[0014] Preferably, the positive electrode probe, negative electrode probe, probe connector, cylinder, core, and sleeve are all on the same center line, and the probe is connected to the host computer through a short-circuit tester.
[0015] Preferably, the positive and negative probes are connected to the host computer via a short-circuit tester for subsequent measurement parameter recording.
[0016] Preferably, a sleeve support frame is provided in the middle of the base, and a sleeve is fixedly installed by the sleeve support frame.
[0017] Preferably, the sleeve support frame is made of insulating material to avoid power leakage during the testing process.
[0018] Preferably, the sleeve is made of metal and serves to restrain the air bag, and the air bag is made of TPU pressure-resistant elastic material.
[0019] Preferably, the air outlet and air inlet are connected to both pressure sensors and solenoid valves to control the inflation and deflation of the air bag in the sleeve. The pressure sensor is connected to the PLC and host computer through a channel transmitter.
[0020] Preferably, the core is a full-tab or multi-tab structure core. The full-tab is formed into positive and negative end faces by flattening, and the multi-tab is prepared by tab die-cutting or laser cutting, and then formed into positive and negative end faces of the core by flattening process.
[0021] Preferably, the process involves placing the full-pole lug core inside the sleeve, and controlling the positioning of the core and the elastic deformation of the sleeve to control the binding force on the core via a host computer. The gas input to the air bag can be pressurized air or nitrogen.
[0022] (III) Beneficial Effects
[0023] The short-circuit testing device for the large cylindrical battery core pre-places the lithium battery on a platform and positions it. The expansion force of the pressurizing mechanism clamps the large cylindrical battery core, and the cylinder pushes the probes against the positive and negative ends of the core. This mechanism can make the lithium battery stable under force and not easily deformed, and can be clamped, thereby improving the stability and reliability of the test. The short-circuit testing device for the large cylindrical battery core has a simple structure and is easy to operate. Attached Figure Description
[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0025] Figure 1 This is an overall structural diagram of a cylindrical all-pole lug core short-circuit testing device according to the present invention;
[0026] Figure 2 This is a side sectional view of a cylindrical all-pole lug core short-circuit testing device according to the present invention;
[0027] Figure 3 This is a front view of the short-circuit testing device for a cylindrical all-pole lug core according to the present invention;
[0028] Figure 4 This is a top view of the short-circuit testing device for a cylindrical all-pole lug core according to the present invention.
[0029] Legend: 1. Base; 2. Cylinder; 3. Probe connector; 4. Push rod; 5. Sleeve support frame; 6. Sleeve; 7. Air outlet; 8. Air inlet; 9. Positive probe; 10. Negative probe. Detailed Implementation
[0030] This application provides a cylindrical all-electrode battery core short-circuit testing device, which solves the problem of chip testing in the prior art. The chip tester is placed on a platform and positioned in advance. The large cylindrical battery core is clamped by the expansion force of the pressurizing mechanism, and the cylinder pushes the probes against the positive and negative ends of the core.
[0031] Example 1
[0032] The technical solution in this application embodiment is to solve the above-mentioned chip testing problem, and the overall idea is as follows:
[0033] like Figure 1-3 As shown, in view of the problems existing in the prior art, this utility model provides a short-circuit testing device for cylindrical omnipolar lug cores, including...
[0034] A base 1, with a pressurizing device in the middle, and testing mechanisms on both sides of the pressurizing device on top of the base 1.
[0035] The pressurization mechanism includes a sleeve 6, inside which an air bag is installed. Two pipes are connected to the top of the air bag, passing through the sleeve 6 as an air outlet 7 and an air inlet 8, respectively. Both the air outlet 7 and the air inlet 8 are connected to pressure sensors and solenoid valves to control the inflation and deflation of the air bag in the sleeve 6. The pressure sensor is connected to a PLC and a host computer via a channel transmitter.
[0036] The testing mechanism includes a cylinder 2, a probe connector 3, and a push rod 4. The cylinder 2 is fixedly installed on both sides of the base 1. The output end of the cylinder 2 is provided with a push rod 4, which pushes the push rod 4 to extend and retract. The end of the push rod 4 is installed with a probe connector 3. A positive electrode probe 9 is provided in the middle of the upper part of the probe connector 3. A negative electrode probe 10 is provided in the middle of the probe connector 3 of another set of testing mechanisms. The positive electrode probe 9 and the negative electrode probe 10 are disc-shaped, and the diameter of the disc is smaller than the diameter of the core.
[0037] The full-pole lug core is placed inside the sleeve. The positioning of the core and the elastic deformation of the sleeve are controlled by the host computer to control the binding force on the core, thereby achieving the purpose of pressurization.
[0038] The input gas can be pressurized air or nitrogen. The core is a full-tab or multi-tab structure core. The full-tab is formed into positive and negative end faces by flattening. The multi-tab can be prepared by tab die-cutting or laser cutting. The positive and negative end faces of the core are formed by flattening process.
[0039] Example 2
[0040] Based on Example 1, the present application's embodiments aim to ensure that the device maintains a stable shape when folded or unfolded. The overall concept is as follows:
[0041] like Figure 4 As shown, the positive probe 9, negative probe 10, probe connector 3, cylinder 2, and the winding core and sleeve 6 are all on the same center line. The probes are connected to the host computer via a short-circuit tester. The positive probe 9 and negative probe 10 are connected to the host computer via the short-circuit tester for subsequent measurement parameter recording.
[0042] A sleeve support frame 5 is provided in the middle of the base 1, and a sleeve 6 is fixedly installed on the sleeve support frame 5. The sleeve support frame 5 is made of insulating material to avoid power leakage during the test. The sleeve 6 is made of metal and plays a role in restraining the air bag. The air bag is made of TPU pressure-resistant elastic material.
[0043] In use, the core is placed inside the sleeve 6. The host computer sends an electrical signal to the PLC, which controls the solenoid valve to drive the cylinder 2 to move, thereby positioning the core using the positive probe 9 and the negative probe 10. The host computer sends a command to the PLC, which controls the inlet solenoid valve to open. High-pressure gas flows through the outlet 7 to inflate the TPU elastic air bag. A pressure sensor on the outlet 7 monitors pressure changes. When the pressure reaches the set pressure, the host computer sends a command to close the inlet solenoid valve. The circular sleeve directs the expansion force of the air bag inward as much as possible, using the expansion force of the air bag to pressurize the core.
[0044] The host computer sends a command to the short-circuit tester, which applies voltage to both sides of the core through probes to perform a short-circuit test. The test voltage is set according to the process parameters. After the test, the result is fed back to the host computer, the probe retracts, the solenoid valve at outlet 8 opens, the air bag pressure returns to normal pressure, and the solenoid valve at outlet 8 closes. The short-circuit test is completed, the probe retracts, the pressure relief valve is opened, the core is removed, and the test results are analyzed.
[0045] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.
Claims
1. A short-circuit testing device for a cylindrical all-pole lug core, characterized in that: A base (1) is provided with a pressurizing device in the middle of the base (1), and testing mechanisms are respectively provided on both sides of the pressurizing device above the base (1). The pressurization mechanism includes a sleeve (6), inside which is an air bag, and inside the air bag is installed the core to be tested. The testing mechanism includes a cylinder (2), a probe connector (3) and a push rod (4). The cylinder (2) is fixedly installed on both sides of the base (1). The output end of the cylinder (2) is provided with a push rod (4) to push the push rod (4) to extend and retract. The end of the push rod (4) is provided with a probe connector (3). A positive probe (9) is provided in the middle of the upper part of the probe connector (3). A negative probe (10) is provided in the middle of the probe connector (3) of another set of testing mechanisms.
2. The cylindrical all-pole lug winding short-circuit test device as described in claim 1, characterized in that: Two pipes are connected to the top of the air bag. The pipes pass through the sleeve (6) and are respectively the air outlet (7) and the air inlet (8).
3. The cylindrical all-pole lug winding short-circuit test device as described in claim 2, characterized in that: The positive electrode probe (9), negative electrode probe (10), probe connector (3), cylinder (2), core and sleeve (6) are all on the same center line, and the probe is connected to the host computer through a short circuit tester.
4. The cylindrical all-pole lug winding short-circuit test device as described in claim 3, characterized in that: The positive probe (9) and negative probe (10) are connected to the host computer via a short-circuit tester.
5. The cylindrical all-pole lug winding short-circuit test device as described in claim 1, characterized in that: A sleeve support frame (5) is provided in the middle of the base (1), and a sleeve (6) is fixedly installed through the sleeve support frame (5).
6. The cylindrical all-pole lug winding short-circuit test device as described in claim 5, characterized in that: The sleeve support frame (5) is made of insulating material, the sleeve (6) is made of metal material, and the air bag is made of TPU pressure-resistant elastic material.
7. The cylindrical all-pole lug winding short-circuit test device as described in claim 4, characterized in that: The positive electrode probe (9) and the negative electrode probe (10) are disc-shaped, and the diameter of the disc is smaller than the diameter of the core.
8. The cylindrical all-pole lug winding short-circuit test device as described in claim 2, characterized in that: The air outlet (7) and air inlet (8) need to be connected to pressure sensors and solenoid valves to control the inflation and deflation of the air bag in the sleeve (6). The pressure sensor is connected to the PLC and host computer through a channel transmitter.
9. The cylindrical all-pole lug winding short-circuit test device as described in claim 1, characterized in that: The core is a full-tab or multi-tab structure core. The full-tab is formed by flattening to form the positive and negative end faces, while the multi-tab can be prepared by die-cutting or laser cutting of the tabs.
10. The cylindrical all-pole lug winding short-circuit test device as described in claim 9, characterized in that: The full-pole ear core is placed inside the sleeve (6). The positioning of the core and the elastic deformation of the sleeve (6) are controlled by the host computer to control the binding force on the core. The gas input to the air bag is pressurized air or nitrogen.