Universal test tool for cylindrical lithium batteries of different models

Abstract

The utility model discloses a general test tool for cylindrical lithium batteries of different models. The device comprises four spring ejector pins which are symmetrically arranged, two spring ejector pin sliding blocks and two L-shaped switching sliding blocks, the transverse surfaces of the two L-shaped switching sliding blocks are respectively arranged on the base plate, each spring ejector pin sliding block is respectively fixed on the vertical surface of the L-shaped switching sliding block, each spring ejector pin sliding block is provided with two fixing holes, and each spring ejector pin is adhered and fixed in the corresponding fixing hole of the spring ejector pin module by using a structural adhesive. According to the utility model, the material cost for developing a special test tool for each type of cylindrical lithium battery is reduced, the tool investment is reduced, and meanwhile, the management cost of a production equipment department on a large number of different types of tools can be reduced.

Description

Technical Field

[0001] The utility model relates to a battery testing tooling, in particular to a universal testing tooling for cylindrical lithium batteries of different models. Background Art

[0002] Under the background of the increasingly serious energy crisis and environmental problems, lithium batteries, as a clean, environmentally friendly and sustainable energy source, will play a significant role in achieving the "dual carbon goal" and the construction of ecological civilization.

[0003] There are many different types of lithium batteries. Among them, cylindrical lithium batteries, as one of the earliest developed types of lithium batteries, have high maturity, good safety, and are convenient for series and parallel combinations after years of development and improvement. They are widely used in 3C products, electric bicycles, electric vehicles and other fields. However, due to the different requirements of different application scenarios and devices, cylindrical lithium batteries are divided into different models according to their sizes. The mainstream models include 18650, 26650, 21700, 32140 and 4680. Accurate and efficient testing of lithium batteries is a key link to ensure product quality and user experience, and the testing tooling can greatly improve the accuracy and efficiency of lithium battery testing. Traditional cylindrical lithium battery testing tooling often only targets specific models, and different types of testing tooling need to be prepared for cylindrical lithium batteries of different models. Therefore, developing a universal testing tooling that can be applied to cylindrical lithium batteries of different models can not only reduce tooling investment and costs, but also improve testing efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a universal testing tooling for cylindrical lithium batteries of different models for the testing of cylindrical lithium batteries.

[0005] The technical solution adopted to achieve the purpose of the utility model is as follows:

[0006] A universal testing tooling for cylindrical lithium batteries of different models includes four spring-loaded pins 1 symmetrically arranged, two spring-loaded pin sliders 2, and two L-shaped transfer sliders 3; the horizontal surfaces of the two L-shaped transfer sliders 3 are respectively installed on the substrate 4, each spring-loaded pin slider is fixed on the vertical surface of the L-shaped transfer slider, two fixing holes are provided on each spring-loaded pin slider, and each spring-loaded pin 1 is adhesively fixed in the corresponding fixing hole of the spring-loaded pin module with structural adhesive.

[0007] As Figure 2 shown, the elastic telescopic part of the spring-loaded pin is located on one side of the spring-loaded pin module, and the solder cup part of the spring-loaded pin is located on the other side. As Figure 3As shown in the figure, two M3 screws are passed through the long round holes on the vertical surface of the L-shaped adapter slider and screwed into the M3 threaded holes of the spring pin module, fixing the spring pin module on the L-shaped adapter slider. As Figure 4 、 5 shown in 5 , four M5 screws are passed through the long round holes of the base plate and the through holes with a diameter of 5.5 on the horizontal side of the L-shaped adapter slider and screwed together with the corresponding four M5 flange nuts to fix the two L-shaped adapter sliders on the base plate. The spring pins on the two spring pin modules press the cylindrical lithium battery against the base plate.

[0008] The material of the spring pin is brass, with a spring installed inside. The tail of the spring pin is in the form of a welding cup and can be used for soldering.

[0009] There are two spring pin fixing holes in the middle of the spring pin slider, and two M3 threaded holes on both sides.

[0010] There are two long round holes with a diameter of 3.2 mm and a length of 16 mm on the vertical surface of the L-shaped adapter slider, and two through holes with a diameter of 5.5 mm on the horizontal surface of the L-shaped adapter slider.

[0011] The base plate has four symmetrically arranged long round holes with a diameter of 5.5 mm and a length of 60 mm.

[0012] Compared with the prior art, the innovation of the present utility model lies in:

[0013] The material of the spring pin is brass, which has good electrical conductivity and strong over-current capacity. A spring is installed inside. The spring pin presses the positive and negative electrodes of the cylindrical lithium battery through the elastic force of the spring, thereby realizing the fixation of the cylindrical lithium battery. And the wire is soldered to the test port of the test equipment through the welding cup at the tail of the spring pin, and tests such as voltage, internal resistance, charge and discharge can be carried out. The spring pin slider is fastened to the L-shaped adapter slider by screws, and the height of the spring pin can be adjusted by adjusting the screw position. The L-shaped adapter slider is fixed to the base plate by screws and nuts, and the distance between the spring pins on both sides can be adjusted by adjusting the screw and nut position, so as to realize the universality of testing different models of cylindrical lithium batteries. This test tooling has flexibility and universality, and has low manufacturing cost and convenient operation. It is applicable to the testing of almost all current mainstream cylindrical lithium batteries in the industry, such as 18650, 26650, 21700, 32140 and 4680. It reduces the material cost of developing special test tooling for each model of cylindrical lithium battery, reduces the investment in tooling, and at the same time can also reduce the management cost of a large number of different types of tooling by the production equipment department. Description of the Drawings

[0014] Figure 1 The figure shows a schematic diagram of a universal test tooling for different models of cylindrical lithium batteries of the present utility model;

[0015] Figure 2It is a schematic diagram of the use of the spring pin slider of the present utility model;

[0016] Figure 3 It is a schematic diagram of the use of the L-shaped adapter slider of the present utility model;

[0017] Figure 4 It is a schematic diagram of the front use of the general test fixture of the present utility model;

[0018] Figure 5 It is a schematic diagram of the back use of the general test fixture of the present utility model;

[0019] Figure 6 It is a schematic diagram of the installation of the 18650 cylindrical battery;

[0020] Figure 7 It is a schematic diagram of the installation of the 21700 cylindrical battery;

[0021] Figure 8 It is a schematic diagram of the installation of the 26650 cylindrical battery;

[0022] Figure 9 It is a schematic diagram of the installation of the 32140 cylindrical battery;

[0023] Figure 10 It is a schematic diagram of the installation of the 4680 cylindrical battery. Specific embodiments

[0024] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] A general test fixture for cylindrical lithium batteries of different models according to the present utility model is as Figure 1 shown, including four spring pins 1 symmetrically arranged, two spring pin sliders 2, and two L-shaped adapter sliders 3; the horizontal sides of the two L-shaped adapter sliders 3 are respectively installed on the substrate 4, and each spring pin slider is fixed on the vertical side of the L-shaped adapter slider, and two fixing holes are provided on each spring pin slider.

[0026] As Figure 2 shown, each spring pin 1 is adhesively fixed in the corresponding fixing hole of the spring pin module with structural adhesive, the elastic telescopic part of the spring pin is located on one side of the spring pin module, and the solder cup part 6 of the spring pin is located on the other side. As Figure 3 shown, two M3 screws 7 are passed through the oblong holes on the vertical surface of the L-shaped adapter slider and screwed into the M3 threaded holes 5 of the spring pin module to fix the spring pin module on the L-shaped adapter slider. As Figure 4 、 5As shown, four M5 screws 9 pass through the oblong holes of the substrate 10 and the through holes 8 with a diameter of 5.5 on the transverse side of the L-shaped adapter slider and are screwed together with the corresponding four M5 flange nuts 11 to fix the two L-shaped adapter sliders on the substrate. The spring pins on the two spring pin modules press the cylindrical lithium battery 12 tightly on the substrate.

[0027] The spring pin 1 is used to press the positive and negative electrodes of the cylindrical lithium battery. The spring pin slider 2 and the L-shaped adapter slider 3 are used to fix the spring pin and adjust the height of the spring pin. The L-shaped adapter slider 3 and the substrate 4 are used to fix the L-shaped adapter slider 3 and adjust the distance between the spring pins on both sides. The material of the spring pin is brass, which has good conductivity and strong overcurrent capacity. A spring is installed inside. The spring pin presses the positive and negative electrodes of the cylindrical lithium battery through the elastic force of the spring, so as to fix the cylindrical lithium battery. And by soldering a wire to the solder cup at the tail of the spring pin and connecting it to the detection port of the test equipment, tests such as voltage, internal resistance, charge and discharge can be carried out. The spring pin slider is fastened to the L-shaped adapter slider by screws, and the height of the spring pin can be adjusted by adjusting the position of the screws. The L-shaped adapter slider is fixed to the substrate by screws and nuts, and the distance between the spring pins on both sides can be adjusted by adjusting the position of the screws and nuts, so as to realize the universality of testing different models of cylindrical lithium batteries.

[0028] By soldering a wire to the solder cup of the spring pin, it can be connected to the detection port of the test equipment, so that tests such as voltage, internal resistance, charge and discharge can be carried out. The hole for fixing the spring pin module on the L-shaped adapter slider is an oblong hole, and the height of the spring pin module can be adjusted by adjusting the position of the M3 fixing screw, that is, the height of the spring pin is adjusted; the hole for the substrate to fix the moving slider is also an oblong hole, and the position of the L-shaped adapter slider can be adjusted by adjusting the position of the M5 fixing screw, so as to realize the adjustment of the distance between the spring pins on both sides. By adjusting the height and distance of the spring pins, the same test tooling can be applied to the testing of different models of cylindrical lithium batteries. Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 The installation diagrams of 18650, 21700, 26650, 32140, and 4680 model cylindrical batteries are shown respectively.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A universal testing tool for cylindrical lithium batteries of different models, characterized in that: It includes four symmetrically arranged spring ejectors, two spring ejector sliders, and two L-shaped transfer sliders; the transverse surfaces of the two L-shaped transfer sliders are respectively installed on the base plate, each spring ejector slider is respectively fixed on the vertical surface of the L-shaped transfer slider, each spring ejector slider is provided with two fixing holes, and each spring ejector is fixed in the corresponding fixing hole of the spring ejector module by structural adhesive.

2. A universal testing tool for cylindrical lithium batteries of different models according to claim 1, characterized in that: The spring ejector slider has two spring ejector fixing holes in the middle and two M3 threaded holes on both sides.

3. A universal testing tool for cylindrical lithium batteries of different models according to claim 1, characterized in that: The vertical surface of the L-shaped transfer slider has two oblong holes with a diameter of 3.2 mm and a length of 16 mm, and the horizontal surface of the L-shaped transfer slider has two through holes with a diameter of 5.5 mm.

4. A universal testing tool for cylindrical lithium batteries of different models according to claim 1, characterized in that: The base plate has four symmetrically arranged oblong holes with a diameter of 5.5 mm and a length of 60 mm.

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