Internal resistance testing mechanism for cylindrical lithium battery explosion-proof combined cap assembly line

Abstract

The utility model discloses an internal resistance test mechanism for a cylindrical lithium battery explosion-proof combined cap assembly line, and relates to the technical field of lithium battery production, the internal resistance test mechanism comprises a transfer assembly used for transferring a battery cap, the outer side of the transfer assembly is provided with a test assembly, and one side, far away from the transfer assembly, of the test assembly is fixedly connected with a support; a cylinder linkage plate of an upper probe structure is driven to descend by a cylinder I and a cylinder linkage plate of a lower probe structure is driven to ascend by a cylinder II, so that a plurality of test pins on the two cylinder linkage plates are close to two sides of a battery cap until test end caps of the plurality of test pins are attached to the surface of the battery cap, and the end surfaces of the test end caps are sawtooth-shaped. The contact surface is stable and is more suitable for cap internal resistance testing; the elastic force generated by the plurality of springs enables the test end cap to be attached to the surface of the battery cap more stably, and no large pressure is generated on the battery cap, so that the battery cap is not abraded, and the normal operation of the test work is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery production technical field, concretely is cylindrical lithium battery explosion -proof combination cap assembly line uses internal resistance test mechanism of cap. BACKGROUND

[0002] Lithium battery refers to the lithium metal or lithium alloy as negative electrode material, using non -aqueous electrolyte solution battery, rely on lithium ion migration between positive and negative to realize charge and discharge, in portable electronic equipment, electric vehicle, energy storage, aerospace, military and other fields have wide application.

[0003] The internal resistance test mechanism adopted by the assembly machine in the existing cylindrical lithium battery explosion -proof combination cap (hereinafter referred to as power cap) industry is the copper sleeve plus test probe compression cap mode test, the equipment runs by the upper and lower test probes compression, the contact area is too large, cannot accurately detect the actual internal resistance value of the cap (especially the cap itself has large internal resistance), and the synchronization with the client is prone to error. At the same time, because the equipment manufacturer knows little about the cap process, it is also a bottleneck of equipment manufacturing;

[0004] In addition, the power cap itself has a large contact resistance, and if external pressure is applied, the cap itself will cause internal resistance to decrease, so that the internal resistance test of the cap will cause the tested internal resistance to be increased by pressure and contact area, which is not the actual internal resistance value of the cap. When the test mechanism is loosened and restored to the original position, the current internal resistance value of the cap is actually large, which causes test error. Utility model content

[0005] The utility model aims at providing cylindrical lithium battery explosion -proof combination cap assembly line internal resistance test mechanism, the copper sleeve plus test probe mode is changed into the mode of testing with multiple test probes, the contact area is small and does not need copper sleeve compression, the internal resistance test is stable, and large internal resistance unqualified cap can be tested, most suitable for power cap, and the internal resistance performance identification rate of cap is enhanced, so as to solve the technical problems in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme:

[0007] Cylindrical lithium battery explosion -proof combination cap assembly line internal resistance test mechanism, including the transfer assembly for transferring battery cap, the outer side of the transfer assembly is equipped with test assembly, and the side, away from the transfer assembly, of test assembly is fixedly connected with support, and the bottom of transfer assembly and support is fixedly connected with the top of bearing plate;

[0008] The test assembly includes upper probe structure and lower probe structure, and the battery cap is located between the upper probe structure and the lower probe structure.

[0009] The upper probe structure and the lower probe structure are identical in structure; the upper probe structure comprises a cylinder linkage plate, one end of the top of which is fixedly connected with cylinder one, and the cylinder linkage plate of the lower probe structure is fixedly connected with cylinder two at the bottom of one end close to cylinder one; a plurality of test needles are movably connected with the cylinder linkage plate at the end away from cylinder one, and each of the plurality of test needles is integrally provided with a test end cap at one end close to the battery cap; each of the plurality of test needles is provided with a spring at the outer side of the end away from the battery cap, one end of the spring is fixedly connected with a connecting piece, and the other end is fixedly connected with the cylinder linkage plate; a data line is sleeved with the inner side of the end away from the spring of the connecting piece, and the data line is electrically connected with the test needle.

[0010] As a further technical scheme of the utility model, a plurality of the test end caps are provided with a plurality of tooth grooves on the side close to the battery cap; the plurality of test needles are fixedly connected with a plurality of connecting pieces respectively; the cylinder linkage plate is fixedly connected with a test probe seat on the side close to the battery cap, and the plurality of test needles are movably connected with the test probe seat.

[0011] As a further technical scheme of the utility model, the cylinder one and the cylinder two are fixedly connected with a support on the side close to the transfer assembly, and the bottom of the support is fixedly connected with the top of the bearing plate through bolts.

[0012] As a further technical scheme of the utility model, the transfer assembly comprises a rotating table, the rotating table is circular, and the rotating table is located between the upper probe structure and the lower probe structure; a driving mechanism is arranged below the rotating table, and the output shaft of the driving mechanism is fixedly connected with the middle of the bottom of the rotating table.

[0013] As a further technical scheme of the utility model, the top of the rotating table is fixedly connected with a plurality of processing tables uniformly, and the plurality of processing tables are distributed in a ring shape; the middle of each of the plurality of processing tables is provided with a through hole, and the rotating table is uniformly provided with a plurality of circular holes, and the plurality of circular holes of the rotating table correspond to the positions of the plurality of through holes respectively.

[0014] As a further technical scheme of the utility model, each of the plurality of processing tables is provided with a baffle in the through hole, the baffle is in a circular ring shape, and the outer side of the baffle is fixedly connected with the inner wall of the processing table; the diameter of the through hole is the same as the diameter of the circular hole of the rotating table.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The utility model discloses, in the internal resistance test process, through cylinder one and cylinder two respectively drive the cylinder linkage board of upper probe structure drop, the cylinder linkage board of lower probe structure lift, thereby let multiple test needles on two cylinder linkage boards close to the both sides of battery cap, until the test end cap of multiple test needles and the surface of battery cap are pasted, and the test end cap end face is sawtooth shape, make its contact surface stable more suitable for cap internal resistance test, and the elasticity of multiple springs can make the surface of test end cap and battery cap more stable, and will not produce greater pressure to battery cap, make battery cap not wear and tear, guarantee the normal operation of test work.

[0017] 2. The utility model discloses, the through -hole of processing platform is used for placing battery cap, and the baffle can bear the battery cap, thereby prevent battery cap from falling from the through -hole, in addition, the baffle is circular ring, can let multiple test needles and test end cap of lower probe structure can pass through the baffle and battery cap contact, guarantee the normal operation of side -view work. DRAWINGS

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0019] Figure 2 It is the side view of the utility model Figure 1 .

[0020] Figure 3 It is the partial structure schematic diagram of the utility model Figure 1 .

[0021] Figure 4 It is the side view of the utility model Figure 3 .

[0022] Figure 5 It is the front view of the utility model Figure 3 .

[0023] Figure 6 It is the local enlarged view of the utility model Figure 1 .

[0024] In the drawing: 1 - transfer assembly, 2 - test assembly, 3 - bearing plate, 4 - support, 5 - battery cap,

[0025] 11 - rotary table, 12 - drive mechanism, 13 - processing platform, 14 - through -hole, 15 - baffle, 21 - upper probe structure, 22 - lower probe structure, 23 - cylinder one, 24 - cylinder two,

[0026] 211 - cylinder linkage board, 212 - test probe seat, 213 - test needle, 214 - test end cap, 215 - connecting piece, 216 - spring, 217 - data line. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0028] Please refer to Figures 1-6 In the embodiments of the utility model, the internal resistance testing mechanism for cylindrical lithium battery explosion-proof combined cap assembly line comprises a transfer assembly 1 for transferring battery caps 5, a testing assembly 2 is arranged on the outer side of the transfer assembly 1, one side of the testing assembly 2 away from the transfer assembly 1 is fixedly connected with a support 4, and the bottom of the transfer assembly 1 and the support 4 are fixedly connected with the top of a bearing plate 3.

[0029] The testing assembly 2 comprises upper probe structures 21 and lower probe structures 22, and the battery caps 5 are located between the upper probe structures 21 and the lower probe structures 22.

[0030] The upper probe structures 21 and the lower probe structures 22 are of the same structure; the upper probe structure 21 comprises a cylinder linkage plate 211, one end of the top of the cylinder linkage plate 211 is fixedly connected with a cylinder one 23, one end of the bottom of the cylinder linkage plate 211 close to the cylinder one 23 is fixedly connected with a cylinder two 27, one end of the cylinder linkage plate 211 away from the cylinder one 23 is movably connected with a plurality of testing needles 213, one end of the plurality of testing needles 213 close to the battery caps 5 is integrally provided with a testing end cap 214, the outer side of one end of the plurality of testing needles 213 away from the battery caps 5 is provided with a spring 216, one end of the spring 216 is fixedly connected with a connecting piece 215, and the other end is fixedly connected with the cylinder linkage plate 211, and the inner side of one end of the connecting piece 215 away from the spring 216 is sleeved with a data line 217, and the data line 217 is electrically connected with the testing needles 213.

[0031] One side of the plurality of testing end caps 214 close to the battery caps 5 is provided with a plurality of tooth grooves; the plurality of testing needles 213 are fixedly connected with the plurality of connecting pieces 215 respectively; the side of the cylinder linkage plate 211 close to the battery caps 5 is fixedly connected with a testing probe base 212, and the plurality of testing needles 213 are movably connected with the testing probe base 212.

[0032] The cylinder one 23 and the cylinder two 27 are fixedly connected with the side of the support 4 close to the transfer assembly 1, and the bottom of the support 4 is fixedly connected with the top of the bearing plate 3 through bolts.

[0033] By adopting the above technical scheme, in the internal resistance test process, the cylinder one 23 and the cylinder two 27 drive the cylinder linkage plate 211 of the upper probe structure 21 to descend and the cylinder linkage plate 211 of the lower probe structure 22 to ascend respectively, so that the plurality of test needles 213 on the two cylinder linkage plates 211 are close to the two sides of the battery cap 5, until the test end cap 214 of the plurality of test needles 213 is attached to the surface of the battery cap 5, the end face of the test end cap 214 is zigzag shape, so that its contact surface is more stable and more suitable for cap internal resistance test; the elastic force generated by the plurality of springs 216 can make the test end cap 214 and the surface of the battery cap 5 more stable, and will not generate a large pressure on the battery cap 5, so that the battery cap 5 will not be abraded, and the normal test work is ensured.

[0034] In the embodiment, the transfer assembly 1 includes a rotating table 11, which is circular and located between the upper probe structure 21 and the lower probe structure 22; a driving mechanism 12 is arranged below the rotating table 11, and the output shaft of the driving mechanism 12 is fixedly connected to the middle of the bottom of the rotating table 11.

[0035] The top of the rotating table 11 is uniformly fixedly connected with a plurality of processing tables 13, and the plurality of processing tables 13 are annularly distributed; the middle of each of the plurality of processing tables 13 is provided with a through hole 14, and the rotating table 11 is uniformly provided with a plurality of circular holes, and the plurality of circular holes of the rotating table 11 correspond to the positions of the plurality of through holes 14 respectively.

[0036] The through hole 14 of each of the plurality of processing tables 13 is provided with a baffle 15, the baffle 15 is annular, and the outer side of the baffle 15 is fixedly connected with the inner wall of the processing table 13; the diameter of the through hole 14 is the same as the diameter of the circular hole of the rotating table 11.

[0037] By adopting the above technical scheme, the through hole 14 of the processing table 13 is used to place the battery cap 5, and the baffle 15 can bear the battery cap 5, so as to prevent the battery cap 5 from falling off from the through hole 14; in addition, the baffle 15 is annular, so that the plurality of test needles 213 and the test end cap 214 of the lower probe structure 22 can contact the battery cap 5 through the baffle 15, and the normal side view work is ensured.

[0038] The working principle of the utility model is: in the internal resistance test process, the cylinder linkage plate 211 of upper probe structure 21 is lowered and the cylinder linkage plate 211 of lower probe structure 22 is lifted by cylinder one 23 and cylinder two 27 respectively, so that multiple test needles 213 on two cylinder linkage plates 211 are close to the two sides of battery cap 5, until the test end cap 214 of multiple test needles 213 is attached to the surface of battery cap 5, the end face of test end cap 214 is sawtooth shape, so that its contact surface is more stable and more suitable for cap internal resistance test; the elasticity of multiple springs 216 can make the test end cap 214 and the surface of battery cap 5 more stable, and will not produce greater pressure to battery cap 5, so that battery cap 5 will not be abraded, guarantee the normal operation of test work;

[0039] The through hole 14 of processing table 13 is used for placing battery cap 5, and baffle 15 can bear battery cap 5, so as to prevent battery cap 5 from falling off from through hole 14; in addition, baffle 15 is circular ring, so that multiple test needles 213 and test end cap 214 of lower probe structure 22 can contact battery cap 5 through baffle 15, guarantee the normal operation of side view work.

[0040] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An internal resistance testing mechanism for a cylindrical lithium battery explosion-proof assembly line, characterized in that: The present invention includes a transfer assembly (1) for transferring the battery cap (5), a test assembly (2) is provided on the outside of the transfer assembly (1), and the side of the test assembly (2) away from the transfer assembly (1) is fixedly connected to the bracket (4). The bottom of the transfer assembly (1) and the bracket (4) are both fixedly connected to the top of the support plate (3). The test component (2) includes an upper probe structure (21) and a lower probe structure (22), and the battery cap (5) is located between the upper probe structure (21) and the lower probe structure (22); The upper probe structure (21) and the lower probe structure (22) have the same structure; the upper probe structure (21) includes a cylinder linkage plate (211), one end of which is fixedly connected to cylinder one (23); the lower probe structure (22) has a cylinder linkage plate (211) near cylinder one (23) with its bottom end fixedly connected to cylinder two (27); multiple test pins (213) are movably connected to the end of the cylinder linkage plate (211) away from cylinder one (23). The end of each test needle (213) near the battery cap (5) is integrally provided with a test end cap (214); the outer side of the end of each test needle (213) away from the battery cap (5) is provided with a spring (216), one end of the spring (216) is fixedly connected to the connector (215), and the other end is fixedly connected to the cylinder linkage plate (211); the inner side of the end of the connector (215) away from the spring (216) is sleeved with a data line (217), and the data line (217) is electrically connected to the test needle (213).

2. The internal resistance testing mechanism for the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 1, characterized in that: Multiple test caps (214) are provided with multiple toothed grooves on the side near the battery cap (5); multiple test pins (213) are fixedly connected to multiple connectors (215); a test probe holder (212) is fixedly connected to the side of the cylinder linkage plate (211) near the battery cap (5), and multiple test pins (213) are movably connected to the test probe holder (212).

3. The internal resistance testing mechanism for the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 2, characterized in that: The cylinders 1 (23) and 2 (27) are fixedly connected to the side of the bracket (4) near the transfer assembly (1), and the bottom of the bracket (4) is fixedly connected to the top of the bearing plate (3) by bolts.

4. The internal resistance testing mechanism for the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 3, characterized in that: The transfer assembly (1) includes a rotating stage (11), which is circular and located between the upper probe structure (21) and the lower probe structure (22); a drive mechanism (12) is provided below the rotating stage (11), and the output shaft of the drive mechanism (12) is fixedly connected to the middle of the bottom of the rotating stage (11).

5. The internal resistance testing mechanism for the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 4, characterized in that: The top of the rotary table (11) is uniformly fixedly connected with multiple processing tables (13), and the multiple processing tables (13) are arranged in a ring. Each of the multiple processing tables (13) has a through hole (14) in the middle. The rotary table (11) is uniformly provided with multiple round holes, and the multiple round holes of the rotary table (11) correspond to the positions of the multiple through holes (14).

6. The internal resistance testing mechanism for the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 5, characterized in that: Each of the through holes (14) of the processing tables (13) is provided with a baffle (15), the baffle (15) is circular, and the outer side of the baffle (15) is fixedly connected to the inner wall of the processing table (13); the diameter of the through hole (14) is the same as the diameter of the circular hole of the rotary table (11).

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