Battery core internal resistance test tool

Abstract

The utility model discloses a battery core internal resistance test tool comprising a limiting assembly and a test assembly which are arranged vertically. The testing assembly comprises a telescopic air cylinder, a first sliding rail, a testing pen and a meter pen positioning block detachably connected with the testing pen, the meter pen positioning block is in sliding connection with the first sliding rail, and the telescopic air cylinder is arranged in the middle of the first sliding rail; the limiting assembly comprises a second sliding rail and a test board connected with the second sliding rail in a sliding mode, and the test pen is arranged towards one side of the test board. According to the utility model, problems of low test efficiency and insufficient test precision in a cell internal resistance test process are solved.

Description

Technical Field

[0001] This utility model belongs to the field of battery testing technology, specifically relating to a battery cell internal resistance testing fixture. Background Technology

[0002] In the battery manufacturing industry, batteries can be classified into two types based on their shape: cylindrical batteries and prismatic batteries. Cylindrical batteries have a wide range of applications due to their structural characteristics. During battery performance testing, the voltage and internal resistance of the battery cell are key test parameters. In particular, the magnitude and difference of the cell's internal resistance directly affect the battery's consistency, performance, and lifespan. Therefore, screening and packaging cells through internal resistance testing is a crucial step in ensuring product quality. Currently, there are internal resistance testing devices available for prismatic cells, but these devices are limited by high cost, large footprint, and inability to adapt to cylindrical cells. At present, manual screening is used to test the internal resistance of cylindrical cells, but this method suffers from high labor costs, low testing efficiency, and insufficient testing accuracy, making it difficult to meet the needs of large-scale, high-precision production. Therefore, there is an urgent need to design an internal resistance testing fixture suitable for cylindrical cells to replace manual screening, improve testing efficiency and accuracy, reduce labor costs, and adapt to the industry's trend towards automation. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a battery cell internal resistance testing fixture, which solves the problems of low testing efficiency and insufficient testing accuracy in the battery cell internal resistance testing process.

[0004] The technical solution of this utility model is: This utility model provides a battery cell internal resistance testing fixture, including: a limiting component and a testing component, wherein the testing component is arranged perpendicularly to the limiting component;

[0005] The testing components include: a telescopic cylinder, a first slide rail, a test pen, and a probe positioning block detachably connected to the test pen. The probe positioning block is slidably connected to the first slide rail, and the telescopic cylinder is located in the middle of the first slide rail.

[0006] The limiting component includes: a second slide rail and a test platform slidably connected to the second slide rail, with the test pen positioned facing the test platform.

[0007] Furthermore, the internal resistance testing fixture also includes a test frame, which includes a crossbar and a base plate. The second slide rail is detachably connected to the base plate, and the telescopic cylinder is fixed in the middle of the crossbar and detachably connected to the crossbar.

[0008] Furthermore, the probe positioning block is provided with a through hole, and a bolt structure is provided on the side near the through hole, through which the test probe is detachably connected to the probe positioning block.

[0009] Furthermore, the testing component also includes an internal resistance tester, which is electrically connected to the test probe via wires.

[0010] Furthermore, the test platform is provided with a positive electrode pin fixing platform and a negative electrode pin fixing platform, and a guide rod is provided between the positive electrode pin fixing platform and the negative electrode pin fixing platform. The positive electrode pin fixing platform and the negative electrode pin fixing platform are slidably connected through the guide rod.

[0011] Furthermore, a sliding cylinder is provided on the side of the negative electrode pin fixing platform away from the positive electrode pin fixing platform, and the sliding cylinder and the guide rod are arranged on the same straight line.

[0012] Furthermore, the positive electrode pin fixing platform is provided with several sets of battery slots, each set of battery slots is provided with a set of positive electrode pins, and a first test plate is provided on the side near the positive electrode pins.

[0013] Furthermore, the negative electrode pin fixing platform is provided with several sets of negative electrode pins on the side near the positive electrode pin fixing platform, each set of negative electrode pins is provided with a set of battery slots, and a second test plate is provided on the side near the negative electrode pins.

[0014] Furthermore, the test pen includes a first test pen and a second test pen, which are symmetrically arranged on the first slide rail. The tip of the first test pen contacts the first test plate, and the tip of the second test pen contacts the second test plate.

[0015] Furthermore, a sliding motor is provided at one end of the second slide rail, and the sliding motor causes the test platform to slide along the second slide rail.

[0016] The beneficial effects of this utility model are as follows: By perpendicularly setting the test component and the limiting component along their axes in the tooling, this utility model ensures accurate cell positioning during testing, avoiding human error; the telescopic cylinder drives the test pen to contact the cell, achieving rapid and stable testing, replacing manual operation and significantly improving testing efficiency; the detachable connection design between the test pen and the probe positioning block facilitates maintenance and calibration, ensuring long-term stability of measurement accuracy; the first and second slide rails, in conjunction with the limiting component, prevent cell position shift during testing, further improving testing accuracy; multiple battery groups can be placed simultaneously on the test platform, and by adjusting the relative positions of the test pen and each battery group, multiple battery groups can be tested sequentially, improving testing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a battery cell internal resistance testing fixture provided by this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the test component;

[0020] Figure 3 for Figure 1 Schematic diagram of the middle limit component;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure of the test bench.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Test component, 2-Limit component, 3-Test fixture;

[0024] 11-Telescopic cylinder, 12-First slide rail, 13-Positioning probe block, 14-First test probe, 15-Second test probe, 16-Internal resistance tester, 21-Test platform, 22-Second slide rail, 23-Sliding motor, 31-Crossbar, 32-Base plate, 33-Top plate;

[0025] 131- Bolt structure, 132- Through hole, 211- Positive electrode pin fixing platform, 212- Negative electrode pin fixing platform, 213- Positive electrode pin, 214- Negative electrode pin, 215- Battery slot, 216- Guide rod, 217- First test plate, 218- Second test plate, 219- Sliding cylinder. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this invention, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0028] The implementation of this utility model will be described in detail below with reference to the specific accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a battery cell internal resistance testing fixture provided by this utility model, as shown below. Figure 1 As shown, the testing fixture includes a testing component 1, a limiting component 2, and a testing frame 3. Both the testing component 1 and the limiting component 2 are detachably connected to the testing frame 3. The testing component 1 is mounted on the crossbar 31 of the testing frame 3, and the limiting component 2 is mounted on the base plate 32 of the testing frame 3. The axial directions of the testing component 1 and the limiting component 2 are perpendicular. The testing component 1 and the limiting component 2 move relative to each other along the axial direction to ensure accurate cell positioning during the test.

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the test component, as shown below. Figure 2 As shown, the test assembly 1 includes a telescopic cylinder 11, a first slide rail 12, a probe positioning block 13, a first test probe 14, a second test probe 15, and an internal resistance tester 16. The telescopic cylinder 11 is fixed to the middle of the crossbeam of the test frame 3. The piston rod of the telescopic cylinder 11 is detachably connected to the middle of the first slide rail 12. Two sets of probe positioning blocks 13 are provided on the first slide rail 12. The first test probe 14 and the second test probe 15 are slidably connected to the first slide rail 12 through the probe positioning blocks 13. The piston rod of the telescopic cylinder 11 moves vertically, controlling the first test probe 14 and the second test probe 15 to move closer to or further away from the battery being tested. The probe positioning block 13 is provided with a through hole 132 and a bolt structure 131. The test probe passes through the through hole 132 and is detachably connected through the bolt structure 131. The first test probe 14 and the second test probe 15 correspond to the positive and negative terminals of the battery, respectively. The distance between the first test probe 14 and the second test probe 15 is adjusted according to the length of the battery. The internal resistance tester 16 is placed on the top plate 33 of the test rack. The internal resistance tester 16 is electrically connected to the first test probe 14 and the second test probe 15 via wires (wires not shown).

[0031] Figure 3 for Figure 1 A schematic diagram of the middle limit component is shown below. Figure 3 As shown, the limiting component 2 includes a test platform 21 and a second slide rail 22 slidably connected to the test platform 21. One end of the second slide rail 22 is provided with a sliding motor 23, which drives the test platform 21 to slide on the second slide rail 22.

[0032] Figure 4 for Figure 3 A schematic diagram of the structure of the test bench, combined with Figure 3 and Figure 4 The test stand 21 is provided with a positive electrode pin fixing platform 211 and a negative electrode pin fixing platform 212. The positive electrode pin fixing platform 211 and the negative electrode pin fixing platform 212 are slidably connected by a guide rod 216. The positive electrode pin fixing platform 211 is provided with several sets of positive electrode pins 213 and battery slots 215. Each set of positive electrode pins 213 corresponds to one set of battery slots 215. The negative electrode pin fixing platform 212 is provided with several sets of negative electrode pins 214. Each set of negative electrode pins 214 corresponds to one set of battery slots 215. In the embodiment of this application, there are ten sets of positive electrode pins and ten sets of battery slots, which can simultaneously measure ten sets of batteries to be tested. A first test plate 217 is provided on the side near the positive electrode pin 213, and the first test plate 217 is electrically connected to the positive electrode pin 213. The tip of the first test pen 14 slides on the first test plate 217. A second test plate 218 is provided on the side near the negative electrode pin 214, and the second test plate 218 is electrically connected to the negative electrode pin 214. The tip of the second test pen 15 slides on the second test plate 218 to obtain the test data of each group of cells and transmit it back to the internal resistance tester 16. A sliding cylinder 219 is provided on the side of the negative electrode pin fixing platform 212 away from the positive electrode pin fixing platform 211. The distance between the negative electrode pin fixing platform 212 and the positive electrode pin fixing platform 211 is adjusted by the sliding cylinder 219. The sliding cylinder 219 and the guide rod 216 are arranged on the same straight line. The distance between the positive electrode pin 213 and the negative electrode pin 214 is adjusted according to the length of different batteries to facilitate the adaptation of cylindrical cells of different specifications and improve the compatibility and flexibility of the equipment.

[0033] The sliding motor 23, telescopic cylinder 11, and sliding cylinder 219 are connected to an external control terminal. Through a software interface or PLC controller, operators can set, monitor, and adjust various parameters during the testing process and perform real-time control. By adjusting the telescopic cylinder 11 and sliding cylinder 219, the test position can be precisely adjusted to ensure accurate alignment of the battery cell. The telescopic cylinder 11 drives the test probe to contact the battery cell for internal resistance testing. By controlling the extension and retraction of the cylinder, the test probe is ensured to accurately contact the battery cell, enabling efficient and stable internal resistance testing.

[0034] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0035] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An electric core resistance test tool, characterized in that, The utility model relates to a kind of internal resistance test tool, including: Limiting assembly and test assembly, the test assembly is vertically arranged with the limiting assembly; The test assembly includes: telescopic cylinder, first slide rail, test pen and table pen positioning block with the test pen detachable connection, the table pen positioning block is slidably connected with the first slide rail, and the telescopic cylinder is arranged in the middle of the first slide rail. The limiting assembly includes: second slide rail and test bench slidably connected with the second slide rail, and the test pen is arranged towards the side of the test bench.

2. The cell resistance test tool of claim 1, wherein, The internal resistance test tool further includes a test stand, the test stand includes a crossbar and a bottom plate, the second slide rail is detachably connected with the bottom plate, and the telescopic cylinder is fixed in the middle of the crossbar and detachably connected with the crossbar.

3. The cell resistance test tool of claim 2, wherein, A through hole is provided on the table pen positioning block, a bolt structure is provided on one side close to the through hole, and the test pen is detachably connected with the table pen positioning block by passing through the through hole.

4. The cell resistance test tool of claim 1, wherein, The test assembly further includes an internal resistance tester, and the internal resistance tester is electrically connected with the test pen by a wire.

5. The cell resistance test tool of claim 1, wherein, A positive needle fixing table and a negative needle fixing table are provided on the test bench, a guide rod is provided between the positive needle fixing table and the negative needle fixing table, and the positive needle fixing table and the negative needle fixing table are slidably connected by the guide rod.

6. The cell resistance test tool of claim 5, wherein, A sliding cylinder is provided on one side of the negative needle fixing table away from the positive needle fixing table, and the sliding cylinder is arranged on the same straight line with the guide rod.

7. The cell resistance test tool of claim 5, wherein the plurality of contact pins are arranged in a circular pattern. A plurality of battery grooves are provided on the positive needle fixing table, each battery groove is provided with a positive needle, and a first test plate is provided on one side close to the positive needle.

8. The cell resistance test tool of claim 7, wherein, A plurality of negative needles are provided on one side of the negative needle fixing table close to the positive needle fixing table, each negative needle is provided with a battery groove, and a second test plate is provided on one side close to the negative needle.

9. The cell resistance test tool of claim 8, wherein, The test pen includes a first test pen and a second test pen, the first test pen and the second test pen are symmetrically arranged on the first slide rail, the pen point of the first test pen is in contact with the first test plate, and the pen point of the second test pen is in contact with the second test plate.

10. The cell resistance test tool of claim 2, wherein, A sliding motor is provided at one end of the second slide rail, and the sliding motor makes the test bench slide along the second slide rail.

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