CN203259632U - Testing apparatus for modular lithium battery - Google Patents

Abstract

The utility model relates to a testing apparatus for a modular lithium battery. The testing apparatus comprises a top plate, a telescoping cylinder, a piston rod cooperating with the telescoping cylinder. One end, free of a piston rod, of the telescoping cylinder is connected with and fixed with a bottom surface of the top plate; one end, extending out of the telescoping cylinder, of the piston rod is connected with a connecting plate; and a probe installing seat is fixed at the bottom of the connecting plate. in addition, the provided testing apparatus also includes a set of probes, wherein retainer rings are arranged at the outsides of the probes; the retainer rings are arranged between an upper probe installing plate and a lower probe installing plate; and springs are sleeved outside the portions, between the retainer rings and the upper probe installation plate, of the probes by a sliding way. Apertures of upper probe installing holes are less than external diameters of the springs; the internal diameters of the springs are less than diameters of the retainer rings; and the apertures of lower probe installing holes are less than diameters of the retainer rings. Because the probe installing plates with the dual-layer structures are arranged and cooperation with the dual-layer plates is realized by the springs arranged outside the probes, the provided testing apparatus has the probe locking installation function and the probes are helped to be tightly pressed at the surface of the battery during the detection process.

Description

Modular lithium battery test device

technical field

The utility model relates to a lithium battery testing device, in particular to a modular lithium battery testing device.

Background technique

The modular lithium battery testing mechanism, referred to as the testing mechanism, is a mechanism that tests the battery cell by contacting the positive and negative electrodes of the battery cell. Before the battery leaves the factory, the battery cell must be chemically formed, that is, the battery cell must be charged and discharged multiple times. This process requires the use of a testing agency.

According to the applicant's understanding, the current domestic battery testing institutions are mainly aimed at single batteries. During the test, the probes are manually operated, and the probes are connected with bolts or alligator clips, but there are problems of poor measurement accuracy and unstable resistance values. . As disclosed in the Chinese utility model patent "Lithium Battery Probe Fixture" (CN201945609U): it includes a probe body, a limit post and a spring. A limit snap ring is installed on the upper end of the limit post, and the limit snap ring is sleeved on the probe main body. When in use, the needle at the bottom of the probe body is connected to the electrode, and the overvoltage is derived from the lead at the top of the probe to measure the overvoltage. The measurement of overcurrent needs to be measured through another probe or metal tube. For the probes involved in the above technical solution, let alone the detection accuracy, it is definitely not able to meet the production needs only from the perspective of meeting the detection requirements in the assembly line production process of the modular battery pack. Because it is unacceptable in terms of efficiency and cost to manually operate the probe to detect the individual battery cells in the battery pack, but there is currently no corresponding modular battery pack on the market. testing agency.

Utility model content

The technical problem to be solved by the utility model is to propose a detection device for fast and automatic detection of modular battery packs.

The technical solution proposed by the utility model for solving the above-mentioned technical problems is: a modular lithium battery testing device, including a top plate, a telescopic cylinder, and a piston rod matched with the telescopic cylinder. The bottom surface of the top plate is connected and fixed, the end of the piston rod protruding from the telescopic cylinder is connected with a connecting plate, and the bottom of the connecting plate is fixed with a probe mounting seat, and the probe mounting seat is mainly installed by upper probes arranged in parallel and at intervals. plate, a lower probe mounting plate, and a sleeve connected and supported between the upper and lower mounting plates. The upper and lower probe mounting plates are respectively provided with a set of upper probe mounting holes and lower probe mounting holes opposite to each other. The needle installation hole also includes a group of probes that are simultaneously passed through the upper and lower probe installation holes and has a retaining ring on the outside. The retaining ring is located between the upper and lower probe mounting plates and is located at The outer sliding sleeve of the probe between the retaining ring and the upper probe mounting plate has a spring, the aperture diameter of the upper probe mounting hole is smaller than the outer diameter of the spring, and the inner diameter of the spring is smaller than the diameter of the retaining ring, so The diameter of the probe installation hole mentioned below is smaller than the diameter of the retaining ring.

Further, the probe includes a rod-type inner probe and a tubular outer probe that is sheathed on the outside of the rod-type inner probe, and an insulating material is placed between the inner probe and the outer probe. The outer circumference of the middle section is provided with a slot for cooperating with the retaining ring, and the retaining ring is an axial elastic retaining ring.

Further, the two ends of the bottom surface of the connecting plate are respectively provided with positioning pins, the side of the connecting plate facing the top plate is equipped with a guide post, and a guide sleeve is embedded in the opposite part of the top plate and the guide post, and the guide post The column is inserted on the top plate by matching with the guide sleeve.

Further, the connecting plate is fixedly connected to the middle of the upper surface of the upper probe mounting plate.

Further, the piston rod and the connecting plate are threadedly connected.

The beneficial effects of the utility model are:

In the modularized lithium battery testing mechanism of the utility model, a plurality of probes are combined and installed together through the probe mounting base. The probe in the utility model adopts a double-probe structure, the outer probe is used for charging and discharging excessive current, and the inner probe is used for voltage data collection. A spring is sheathed outside the probe and a retaining ring for limiting the spring is provided. During the test, the probe is pushed to the lithium battery module to be tested through the expansion of the telescopic cylinder. When the bottom of the probe reaches the lithium battery module, the telescopic cylinder does not stop expanding until the probe is completely pressed against the lithium battery module. The probe moves upward relative to the upper probe mounting plate, and the retaining ring under the spring forms a compression of the spring with the lifting of the probe. After the spring is compressed, the top is pressed tightly against the bottom surface of the upper mounting plate. The force exerted by a single probe on the battery cell is about 6kgf. This pressure can ensure good contact between the probe and the battery cell, which is conducive to the test. The utility model cleverly sets a probe mounting seat with a double-layer structure, and cooperates with the upper probe mounting plate in the probe mounting seat through the spring outside the probe, and then assists the detection by pushing the retaining ring during detection. The needle presses firmly against the surface of the battery. The utility model provides an unprecedented device capable of batch detection of modularized batteries in the market, which fills up a gap in the market and has certain significance for improving battery production efficiency.

Description of drawings

The modular lithium battery testing device of the present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural view of a modular lithium battery testing device in the present invention.

FIG. 2 is a side view of FIG. 1 .

Fig. 3 is a working state diagram of the modular lithium battery testing device in Fig. 2 .

Fig. 4 is a schematic structural diagram of a lithium battery test probe.

Detailed ways

Embodiment one

According to Fig. 1 and Fig. 2, the modularized lithium battery testing device in the utility model includes a top plate 1, a cylinder 2, a piston rod matched with the cylinder 2, a connecting plate 3, a probe mount 4 and a probe 5.

Wherein, the top plate 1 is used to fix the cylinder 2, and the cylinder 2 can also be other telescopic cylinders, such as hydraulic cylinders and the like. One end of the cylinder 2 without the piston rod is fixedly connected to the bottom surface of the top plate 1 . One end of the piston rod protruding from the cylinder 2 is connected with a connecting plate 3 , and the bottom of the connecting plate 3 is connected and fixed with a probe mounting seat 4 .

The probe mounting base 4 is mainly composed of an upper mounting plate 4.1, a lower mounting plate 4.2 arranged in parallel and at intervals, and a sleeve 4.3 connected and supported between the upper and lower probe mounting plates. The upper probe mounting plate 4.1 and the sleeve 4.3 and the lower probe mounting plate 4.2 are sequentially fixed together through fastening bolts. The upper and lower probe mounting plates 4.1 and 4.2 are respectively provided with a set of upper probe mounting holes and lower probe mounting holes opposite to each other. The probe installation holes are respectively distributed at intervals on the longitudinal sides of the upper and lower probe installation plates 4.1 and 4.2.

The probe 5 includes a rod-type inner probe 5.1 and a tubular outer probe 5.2 sheathed on the outside of the rod-type inner probe 5.1, and an insulating material 5.3 is separated between the inner probe 5.1 and the outer probe 5.2. The probes are simultaneously installed in the upper and lower probe mounting holes. The outside of the probe 5 is provided with an axial circlip 5.5, and the outer circumference of the middle section of the lithium battery test probe 5 is provided with a slot for cooperating with the axial circlip 5.5, and the axial circlip 5.5 is sleeved in the slot Inside, the axial elastic retaining ring 5.5 is located between the upper and lower probe mounting plates 4.1 and 4.2. There is a spring 5.4 in the outer sliding sleeve of the probe between the retaining ring 5.5 and the upper probe mounting plate 4.1.

The aperture of the upper probe mounting hole is smaller than the outer diameter of the spring 5.4, the inner diameter of the spring 5.4 is smaller than the diameter of the retaining ring 5.5, and the aperture of the lower probe mounting hole is less than the diameter of the retaining ring 5.5.

The probes may also be probes for other test types.

Embodiment two

On the basis of Embodiment 1, the improvements that can be made include: the two ends of the bottom surface of the connecting plate 3 are respectively provided with positioning pins 6, the side of the connecting plate 3 facing the top plate 1 is equipped with a guide post 7, and the connection between the top plate 1 and the guide post 7 A guide sleeve 8 is embedded in the opposite place, and the guide post 7 is inserted on the top plate 1 by matching with the guide sleeve 8 .

The end of the piston rod is provided with an external thread, and the connecting plate 3 intends to be connected with the piston rod to have a screw hole outside, and the piston rod and the connecting plate 3 are threadedly connected.

As shown in FIG. 3 , during testing, the lithium battery test probe 5 is pushed to the lithium battery module to be tested (not shown in the figure) through the expansion of the cylinder 2 . When the bottom of the lithium battery test probe 5 reaches the lithium battery module, the cylinder 2 does not stop expanding until the lithium battery test probe 5 is completely pressed against the lithium battery module. The lithium battery test probe 5 moves upward relative to the upper probe mounting plate, and the retaining ring below the spring 5.4 is also lifted up with the lithium battery test probe 5 and compresses the spring 5.4. After the spring 5.4 is compressed, the top of the spring 5.4 is pressed tightly on the On the bottom surface of the upper probe mounting plate, under the action of spring 5.4, the force of a single probe acting on the battery cell is about 6kgf. This pressure can ensure good contact between the probe and the battery cell, which is conducive to the test.

The utility model is not limited to the above-mentioned embodiments, and any technical solution formed by equivalent replacement falls within the scope of protection required by the utility model.

Claims (5)

1. A modular lithium battery testing device, comprising a top plate, a telescopic cylinder, and a piston rod matched with the telescopic cylinder, one end of the telescopic cylinder without a piston rod is connected and fixed to the bottom surface of the top plate, and the piston rod stretches out to expand and contract. One end of the cylinder is connected with a connection plate, which is characterized in that: the bottom of the connection plate is fixed with a probe mounting seat, and the probe mounting seat is mainly composed of an upper probe mounting plate, a lower probe mounting plate and a lower probe mounting plate arranged in parallel and at intervals. Connecting and supporting the sleeve between the upper and lower probe mounting plates, the upper and lower probe mounting plates are respectively provided with a set of opposite upper probe mounting holes and lower probe mounting holes, and also includes At the same time, a group of probes that are installed in the upper and lower probe mounting holes and have a retaining ring outside, the retaining ring is located between the upper and lower probe mounting plates, and is located between the retaining ring and the The outer sliding sleeve of the probe between the above probe mounting plates has a spring, the aperture of the upper probe mounting hole is smaller than the outer diameter of the spring, the inner diameter of the spring is smaller than the diameter of the retaining ring, and the lower probe mounting hole The bore diameter is smaller than the diameter of the retaining ring. 2. The modularized lithium battery testing device according to claim 1, wherein the probe comprises a rod-type inner probe and a tubular outer probe set outside the rod-type inner probe, and the inner There is an insulating material between the probe and the outer probe, and the outer circumference of the middle section of the probe is provided with a slot for matching with the retaining ring, and the retaining ring is an axial elastic retaining ring. 3. The modularized lithium battery testing device according to claim 1, characterized in that: positioning pins are respectively provided at both ends of the bottom surface of the connecting plate, guide posts are installed on the side of the connecting plate facing the top plate, the A guide sleeve is embedded in the opposite position between the top plate and the guide post, and the guide post is inserted into the top plate by matching with the guide sleeve. 4. The modularized lithium battery testing device according to claim 1, wherein the connecting plate is fixedly connected to the middle of the upper surface of the upper probe mounting plate. 5 . The modularized lithium battery testing device according to claim 1 , wherein the piston rod is threadedly connected to the connecting plate. 6 .

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