Cylindrical battery on-line resistance testing device

Abstract

The utility model discloses a cylindrical battery on -line resistance testing arrangement, including conveying line, conveying line sets up between conveying line fixed plate, is provided with a plurality of battery carrier clamps of clamping battery on conveying line, still be provided with combination air cylinder fixed bolster on conveying line fixed plate, is provided with internal resistance tooling on combination air cylinder fixed bolster, the bottom of internal resistance tooling is provided with the V type battery clamping groove cooperation with battery, the outside of V type battery clamping groove is provided with internal resistance test probe, and internal resistance test probe sets up on fixed block through connecting block, and fixed block sets up between combination air cylinder fixed bolster. The utility model discloses can carry out automatic internal resistance detection on the assembly line after battery complete encapsulation, sorting, need not offline handling, and the detection speed and production line automation level are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of power battery production and online testing technology, specifically to an online resistance testing device for cylindrical batteries. Background Technology

[0002] With the rapid promotion of new energy vehicles and energy storage systems, the production capacity of cylindrical lithium-ion batteries has increased significantly, and the production cycle is constantly accelerating. At the same time, the requirements for battery safety, performance consistency, and reliability are becoming increasingly stringent. In the battery manufacturing process, internal resistance testing is a core step in quality control, and its main purpose is to: 1. Identify manufacturing defects Detecting internal connection problems: When the electrode welding quality is poor, the current collector is poorly soldered, or the conductive materials are not in close contact, the internal resistance value often increases significantly (e.g., >50mΩ), which will lead to the obstruction of instantaneous current transmission and affect the battery output performance and safety.

[0003] Material anomalies can be detected through uneven electrode coatings, diaphragm defects, or metal particles left over from the production process. These can be reflected by abnormal internal resistance. If these hidden dangers are not eliminated in time, they will significantly increase the risk of internal short circuits and capacity decay.

[0004] 2. Evaluate battery performance Predicted lifespan and efficiency: Internal resistance is an important indicator of battery charge and discharge efficiency and thermal management performance. High internal resistance batteries will generate excessive heat during rapid charge and discharge, which will accelerate electrochemical degradation, and the actual usable capacity is often less than 80% of the nominal capacity.

[0005] Optimize batch consistency: In large-scale production, online internal resistance testing can ensure that the internal resistance distribution of batteries in the same batch is uniform, with a yield target of >99.5%, ensuring the overall consistency and operational stability of the battery pack.

[0006] 3. Ensure safety Preventing thermal runaway: High local internal resistance can cause excessive heating in a certain part of the battery when a large current passes through it, which can lead to thermal runaway (fire, explosion) accidents.

[0007] Assisting other safety tests: Internal resistance testing is linked with voltage, insulation strength, leakage current and other tests to build a multi-layer protection system and achieve comprehensive screening of risks such as micro short circuits, manufacturing defects and material deterioration.

[0008] Traditional internal resistance testing is mostly performed at centralized workstations, requiring manual or semi-automatic transport of manufactured batteries to a dedicated testing station. The testing cycle is approximately 1–2 seconds per battery, and the costs associated with manpower, logistics, and equipment changeover are high, thus limiting the overall efficiency of the production line. To reduce manual handling costs, shorten the testing cycle, and achieve truly "zero-transfer" online testing, there is an urgent need for a high-efficiency internal resistance testing device that can be directly integrated into the production line. Utility Model Content

[0009] To address the shortcomings of existing technologies, such as the need for centralized testing of internal resistance, low efficiency, and high cost, the present invention aims to provide an online resistance testing device for cylindrical batteries. This device can perform automated internal resistance testing on the production line after the batteries have been packaged and sorted, eliminating the need for offline handling and significantly improving testing speed and production line automation.

[0010] To achieve the above objectives, this utility model is implemented through the following technical solution: a cylindrical battery line resistance testing device, including a conveyor line, the conveyor line being arranged between conveyor line fixing plates, a plurality of battery carrier clamps for holding batteries being arranged on the conveyor line, a combined cylinder fixing bracket being arranged on the conveyor line fixing plate, an internal resistance fixture being arranged on the combined cylinder fixing bracket, a V-shaped battery clamping groove being arranged at the bottom of the internal resistance fixture to cooperate with the battery, an internal resistance testing probe being arranged on the outside of the V-shaped battery clamping groove, the internal resistance testing probe being arranged on a fixing block through a connecting block, and the fixing block being arranged between the combined cylinder fixing brackets.

[0011] Preferably, the battery carrier clamps are evenly distributed on the conveyor line.

[0012] This utility model has the following beneficial effects: 1. Precise positioning and high test stability. V-shaped clamp self-centering design: The V-shaped battery clamp uses an inclined structure to adaptively clamp the battery, which can quickly center it and prevent the battery from moving during testing, ensuring the consistency of the contact position between the positive and negative terminals and the probe, and reducing test errors caused by poor contact.

[0013] Rigid fixation and perpendicular contact with the probe: The internal resistance fixture provides stable pressure when pressed down, and together with the fixing block 10, it provides rigid support for the probe, ensuring that the probe is in perpendicular contact with the battery terminal, reducing contact resistance interference and improving data accuracy.

[0014] 2. Automated continuous testing significantly improves efficiency. Streamlined integrated design: The conveyor line and battery carrier fixture enable continuous battery transport, and the test station is seamlessly connected to the production line, eliminating the need for manual transfer; the pneumatic pressing of the internal resistance fixture and the rapid response of the probe contact action match the test cycle and the production line speed, greatly increasing the test volume per unit time (more than 50% more efficient than manual testing).

[0015] Real-time data recording and automatic screening: Test data is uploaded to the system synchronously, and information on unqualified batteries is automatically marked. Mechanical screening is then completed at the next workstation, avoiding human judgment errors and missed inspections, and achieving full-process quality traceability.

[0016] 3. Compact structure and strong adaptability Modular layout: The internal resistance tooling, V-groove, and probe are integrated into the combined cylinder fixing bracket, which has a compact structure, occupies little space, and can be flexibly integrated into existing cylindrical battery production lines (such as after liquid injection and packaging processes).

[0017] Multi-specification compatibility: The opening angle of the V-groove and the size of the battery carrier clamp 3 can be adjusted according to the battery diameter, so that it can be adapted to the testing needs of different models of cylindrical batteries without replacing the entire equipment.

[0018] 4. Easy to operate and low maintenance cost Pneumatic drive and simplified mechanical structure: The internal resistance tooling and probe are driven by a cylinder, which has a fast response speed and low failure rate, and reduces the complexity of the control system compared with motor drive.

[0019] Quick replacement of vulnerable parts: The V-groove and internal resistance test probe are modularly installed through connecting blocks and fixing blocks. They can be disassembled and replaced individually after wear, reducing maintenance downtime and spare parts costs.

[0020] 5. Security and Reliability Assurance Non-contact data transmission: Test data is automatically recorded by the system, avoiding data tampering or omission caused by manual intervention; the battery is mechanically fixed by the carrier clamp and V-shaped groove throughout the process, reducing the risk of battery falling or short circuit during the test. Attached Figure Description

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments; Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Reference Figure 1The specific embodiment adopts the following technical solution: a cylindrical battery line resistance testing device, including a conveyor line 1, the conveyor line 1 is arranged between conveyor line fixing plates 2, a plurality of battery carrier clamps 3 for clamping batteries 4 are arranged on the conveyor line 1, a combined cylinder fixing bracket 5 is also arranged on the conveyor line fixing plate 2, an internal resistance fixture 6 is arranged on the combined cylinder fixing bracket 5, a V-shaped battery clamping groove 7 that cooperates with the battery is arranged at the bottom of the internal resistance fixture 6, an internal resistance test probe 8 is arranged on the outside of the V-shaped battery clamping groove 7, and the internal resistance test probe 8 is arranged on the fixing block 10 through the connecting block 9, and the fixing block 10 is arranged between the combined cylinder fixing brackets 5.

[0024] The working principle of this specific implementation method is as follows: When the battery flows with the carrier to the bottom of the internal resistance fixture, the fixture presses down and fixes the battery in place by the designed V-shaped clamping groove to prevent it from moving around. Finally, the internal resistance probe contacts the positive and negative terminals of the battery under the push of the cylinder to complete the test. The internal resistance data of unqualified batteries is recorded by the system and screened in the next station.

[0025] This specific implementation method achieves high precision, high efficiency, and high reliability in cylindrical battery internal resistance testing through "V-shaped centering and positioning + automated integration + modular design," effectively solving problems such as low efficiency, large errors, and missed detections in manual testing. It is especially suitable for online quality inspection in large-scale power battery or consumer electronics battery production lines.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for testing the resistance of a cylindrical battery inline, characterized in that, The system includes a conveyor line (1), which is set between conveyor line fixing plates (2). The conveyor line (1) is equipped with multiple battery carrier clamps (3) for holding batteries (4). The conveyor line fixing plate (2) is also equipped with a combined cylinder fixing bracket (5). The combined cylinder fixing bracket (5) is equipped with an internal resistance fixture (6). The bottom of the internal resistance fixture (6) is equipped with a V-shaped battery clamping groove (7) that cooperates with the battery. An internal resistance test probe (8) is set on the outside of the V-shaped battery clamping groove (7). The internal resistance test probe (8) is set on a fixing block (10) through a connecting block (9). The fixing block (10) is set between the combined cylinder fixing brackets (5).

2. The cylindrical battery in-line resistance testing device according to claim 1, characterized in that, The battery carrier clamps (3) are evenly distributed on the conveyor line (1).

Images