Special support for ternary lithium cell detection

Abstract

The utility model discloses a special bracket for detecting a ternary lithium battery cell. The special bracket comprises a battery cell detection bracket, according to the battery cell detection device, the battery cell detection support is arranged and comprises the battery cell support, the supporting groove, the connecting cavity, the positive and negative screw rod, the first nut, the threaded sleeve, the sliding groove, the detection bases, the metal pole piece and the detection wire, and a battery cell to be detected is transversely placed on the inner side of the supporting groove, so that the battery cell is arranged between the detection bases on the two sides; at the moment, the positive electrode and the negative electrode of the battery cell are in contact with the metal pole pieces of the detection bases on the two sides respectively, so that the internal resistance instrument is electrically connected with the battery cell through the metal pole pieces, internal resistance value and voltage detection of the battery cell is achieved, and during batch detection work, the battery cell only needs to be sequentially replaced and placed into the inner side of the supporting groove to be in butt joint with the metal pole pieces; the positive and negative electrodes of the battery cell are connected without operating two meter pens, so that the battery cell detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, specifically a special bracket for testing ternary lithium battery cells. Background Technology

[0002] Ternary lithium-ion battery cells refer to battery cells that use lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminum oxide as positive electrode materials. They are characterized by high energy density, long cycle life, low cost, and high safety. Common ternary lithium-ion battery cells include the 18650 and 21700 models, which are widely used in various electronic devices and power tools.

[0003] In existing technologies, internal resistance meters are typically used to detect the internal resistance and voltage of ternary lithium battery cells to assess whether the cells are functioning properly. However, using an internal resistance meter requires connecting two probes to the positive and negative terminals of the cell. Since the 18650 and 21700 models are cylindrical cells, they are prone to rolling and displacement when placed on a table, lacking proper support and stability, making operation inconvenient. Furthermore, each test requires connecting two probes to the positive and negative terminals, resulting in low efficiency when testing cells in batches. Therefore, we propose a dedicated ternary lithium battery cell testing bracket to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a special bracket for testing ternary lithium battery cells to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a special bracket for testing ternary lithium battery cells, comprising a cell testing bracket, wherein the cell testing bracket includes a cell support, a support groove, a connecting cavity, positive and negative screws, a No. 1 nut, a threaded sleeve, a sliding groove, a testing seat, metal electrode sheets, and testing leads. A support groove is formed in the center of the top surface of the cell support, and a connecting cavity is horizontally formed through the bottom inner side of the cell support. Positive and negative screws are provided inside the connecting cavity, and a No. 1 nut is welded and fixed to both ends of the positive and negative screws. The No. 1 nut is rotatably connected to the end of the connecting cavity. Threaded sleeves are symmetrically arranged at both ends of the positive and negative screws, and the threaded sleeves are threaded onto the surfaces of the positive and negative screws. The top surface of the cell bracket has symmetrically opened sliding grooves on both the left and right sides, and the sliding grooves are connected to the inner side of the connecting cavity. The top of the threaded sleeve slides along the inner side of the sliding groove. Detection seats are symmetrically arranged on both the left and right sides of the top surface of the cell bracket. The top of the threaded sleeve passes through the sliding groove and is connected and fixed to the detection seat. The detection seat moves synchronously with the threaded sleeve. A metal electrode is embedded on the inner side of the detection seat, and a detection wire is connected to the outer side of the detection seat. The detection wire passes through the detection seat and is electrically connected to the metal electrode.

[0006] Preferably, the length of the groove is not less than 30mm.

[0007] Preferably, the support groove is a V-shaped groove.

[0008] Preferably, the detection seat includes a lower seat body, an upper seat body, an upper lug, a lower lug, a second nut, and a lifting screw. The upper seat body is slidably connected to the inner top of the lower seat body. A threaded sleeve is installed at the bottom of the lower seat body. The metal electrode and the detection wire are respectively installed on both sides of the upper seat body. The upper seat body has an upper lug at the front, and the lower seat body has a lower lug at the front. The upper lug and the lower lug are in the same vertical direction. A second nut is rotatably installed on the inner side of the upper lug. The bottom of the second nut is connected to the lifting screw. The lifting screw passes longitudinally through the threaded hole inside the lower lug and is threadedly connected to it.

[0009] Preferably, the extendable length of the upper seat is not less than 2cm.

[0010] Preferably, the second nut has the same size and specifications as the first nut.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features a battery cell testing bracket. By placing the battery cell to be tested horizontally inside the support groove, the battery cell is positioned between two testing seats on either side. At this point, the positive and negative terminals of the battery cell contact the metal electrodes of the testing seats on both sides, allowing the internal resistance meter to be electrically connected to the battery cell through the metal electrodes. This enables the detection of the battery cell's internal resistance and voltage. When performing batch testing, the battery cells can be sequentially replaced and placed inside the support groove to connect with the metal electrodes, eliminating the need to use two test leads to connect the positive and negative terminals of the battery cell, thus greatly improving the efficiency of battery cell testing.

[0013] This utility model features a testing seat. By turning the No. 2 nut with a wrench, the lifting screw at the bottom of the upper lug is controlled to rotate. The rotating lifting screw causes the lower lug to move up and down, thereby controlling the extension and retraction height of the upper seat at the top of the lower seat. This allows for height adjustment of the testing seat, enabling the metal electrode to be adjusted to different heights to better accommodate battery cells of different sizes and specifications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the battery cell testing bracket structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the usage status of the battery cell testing bracket in this utility model;

[0016] Figure 3 This is a front view cross-sectional structural diagram of the battery cell support of this utility model;

[0017] Figure 4 This is a schematic diagram of the detection seat structure of this utility model.

[0018] In the diagram: Cell testing bracket-1, Cell bracket-11, Support groove-12, Connecting cavity-13, Positive and negative screws-14, No. 1 nut-15, Threaded sleeve-16, Sliding groove-17, Testing seat-18, Lower seat body-181, Upper seat body-182, Upper lug-183, Lower lug-184, No. 2 nut-185, Lifting screw-186, Metal electrode plate-19, Testing lead wire-110. Detailed Implementation

[0019] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0020] Please see Figure 1-3 This utility model provides a special bracket for testing ternary lithium battery cells, including a cell testing bracket 1. The cell testing bracket 1 includes a cell support 11, a support groove 12, a connecting cavity 13, positive and negative screws 14, a No. 1 nut 15, a threaded sleeve 16, a sliding groove 17, a testing seat 18, a metal electrode 19, and a testing lead wire 110. The support groove 12 is opened in the middle of the top surface of the cell support 11. The connecting cavity 13 is horizontally and through the bottom of the inner side of the cell support 11. The positive and negative screws 14 are provided inside the connecting cavity 13. The No. 1 nut 15 is welded and fixed at both ends of the positive and negative screws 14. The No. 1 nut 15 is rotatably connected to the end of the connecting cavity 13. The positive and negative screws 14 are located on the left and right sides. A threaded sleeve 16 is symmetrically arranged at each end, and the threaded sleeve 16 is threaded onto the surface of the positive and negative screws 14. The top surface of the battery cell bracket 11 has two symmetrically opened sliding grooves 17, which are connected to the inner side of the connecting cavity 13. The top of the threaded sleeve 16 slides along the inner side of the sliding groove 17. The top surface of the battery cell bracket 11 has two symmetrically arranged detection seats 18. The top of the threaded sleeve 16 passes through the sliding groove 17 and is connected and fixed to the detection seat 18. The detection seat 18 moves synchronously with the threaded sleeve 16. A metal electrode 19 is embedded in the inner side of the detection seat 18. A detection wire 110 is connected to the outer side of the detection seat 18. The detection wire 110 passes through the detection seat 18 and is electrically connected to the metal electrode 19.

[0021] To further explain, the length of the slide groove 17 is not less than 30mm, so that the test seat 18 has enough adjustment space to better adapt to battery cells of different sizes and specifications.

[0022] To further explain, the support groove 12 is a V-shaped groove, which enables the support groove 12 to provide good support and fixation for cylindrical battery cells with different outer diameters.

[0023] Please see Figure 4This utility model provides a special bracket for testing ternary lithium battery cells. The testing base 18 includes a lower base 181, an upper base 182, an upper lug 183, a lower lug 184, a second nut 185, and a lifting screw 186. The upper base 182 is slidably connected to the inner side of the top of the lower base 181. A threaded sleeve 16 is installed at the bottom of the lower base 181. Metal electrode 19 and testing wire 110 are respectively installed on both sides of the upper base 182. The upper base 182 has an upper lug 183 at the front and the lower base 181 has a lower lug 184 at the front. The upper lug 183 and the lower lug 184 are in the same vertical direction. The second nut 185 is rotatably installed on the inner side of the upper lug 183. The lifting screw 186 is connected to the bottom of the second nut 185. The lifting screw 186 passes longitudinally through the threaded hole inside the lower lug 184 and is threadedly connected to it.

[0024] To further explain, the extendable length of the upper body 182 is not less than 2cm, which gives the test seat 18 good adjustability to better adapt to battery cells of different sizes and specifications.

[0025] To further explain, the No. 2 nut 185 and the No. 1 nut 15 are the same size, so that the No. 2 nut 185 and the No. 1 nut 15 can be adjusted using the same wrench, making them more convenient to use.

[0026] The working principle is as follows:

[0027] First, connect the two test leads 110 on the left and right sides of the cell test bracket 1 to the internal resistance meter. When in use, place the cell to be tested horizontally inside the support groove 12, so that the cell is placed between the test seats 18 on both sides. At this time, the positive and negative terminals of the cell are in contact with the metal plates 19 of the test seats 18 on both sides, so that the internal resistance meter is electrically connected to the cell through the metal plates 19, thereby realizing the detection of the internal resistance value and voltage of the cell. When performing batch testing, simply replace the cells one by one and place them inside the support groove 12 to connect with the metal plates 19. There is no need to operate the two test leads to connect the positive and negative terminals of the cell, which greatly improves the cell testing efficiency.

[0028] Secondly, during use, a wrench can be used to turn the No. 1 nut 15 to control the rotation of the positive and negative screws 14 in the connecting cavity 13, thereby driving the threaded sleeve 16 to move the detection seat 18 along the slide groove 17, thereby realizing the position adjustment of the detection seat 18. The distance between the detection seat 18 and the support groove 12 can be adjusted to better adapt to battery cells of different sizes and specifications.

[0029] Third, during use, a wrench can be used to turn the No. 2 nut 185 to control the rotation of the lifting screw 186 at the bottom of the upper lug 183. The rotating lifting screw 186 will drive the lower lug 184 to move up and down, thereby controlling the extension and retraction height of the upper seat 182 at the top of the lower seat 181, thus realizing the height adjustment of the detection seat 18. The metal electrode 19 can be adjusted to different heights to better adapt to battery cells of different sizes and specifications.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special bracket for testing ternary lithium battery cells, characterized in that: The device includes a cell testing bracket (1), which comprises a cell support (11), a support groove (12), a connecting cavity (13), a positive and negative screw (14), a first nut (15), a threaded sleeve (16), a sliding groove (17), a testing seat (18), a metal electrode (19), and a testing lead wire (110). The support groove (12) is provided in the middle of the top surface of the cell support (11). The connecting cavity (13) is horizontally provided through the bottom of the inner side of the cell support (11). The positive and negative screw (14) is provided inside the connecting cavity (13). The first nut (15) is welded and fixed at both ends of the positive and negative screw (14). The first nut (15) is rotatably connected to the end of the connecting cavity (13). The threaded sleeve (16) is symmetrically provided at the left and right ends of the positive and negative screw (14). The threaded sleeve (16) is threaded onto the surface of the positive and negative screws (14). The top surface of the battery cell support (11) is symmetrically provided with two sliding grooves (17), and the sliding grooves (17) are connected to the inner side of the connecting cavity (13). The top of the threaded sleeve (16) slides along the inner side of the sliding groove (17). The top surface of the battery cell support (11) is symmetrically provided with two detection seats (18). The top of the threaded sleeve (16) passes through the sliding groove (17) and is connected and fixed to the detection seat (18). The detection seat (18) moves synchronously with the threaded sleeve (16). The inner side of the detection seat (18) is embedded with a metal electrode (19). The outer side of the detection seat (18) is connected with a detection wire (110). The detection wire (110) passes through the detection seat (18) and is electrically connected to the metal electrode (19).

2. The special bracket for testing ternary lithium battery cells according to claim 1, characterized in that: The length of the groove (17) is not less than 30mm.

3. The special bracket for testing ternary lithium battery cells according to claim 1, characterized in that: The support groove (12) is a V-shaped groove.

4. The special bracket for testing ternary lithium battery cells according to claim 1, characterized in that: The detection seat (18) includes a lower seat (181), an upper seat (182), an upper lug (183), a lower lug (184), a second nut (185), and a lifting screw (186). The upper seat (182) is slidably connected to the inner top of the lower seat (181). A threaded sleeve (16) is installed at the bottom of the lower seat (181), and metal electrode plates (19) and detection leads (110) are respectively installed on both sides of the upper seat (182). The upper body (182) has an upper lug (183) at the front and the lower body (181) has a lower lug (184) at the front. The upper lug (183) and the lower lug (184) are in the same vertical direction. A second nut (185) is rotatably installed on the inner side of the upper lug (183). A lifting screw (186) is connected to the bottom of the second nut (185). The lifting screw (186) passes longitudinally through the inner screw hole of the lower lug (184) and is threadedly connected to it.

5. The special bracket for testing ternary lithium battery cells according to claim 4, characterized in that: The extendable length of the upper seat (182) is not less than 2cm.

6. The special bracket for testing ternary lithium battery cells according to claim 4, characterized in that: The No. 2 nut (185) has the same size and specifications as the No. 1 nut (15).

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