Test jig for echelon recovery of lithium batteries

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a lithium battery echelon recovery test frame, which comprises a base, a mounting rack mounted on the base and two probe modules symmetrically mounted on the mounting rack, a plurality of probes are arranged on the probe modules, the probes are connected to a battery detector, and the battery detector is connected with the base. The probe module has a degree of freedom of rotation in the vertical direction, the gravity center of the probe module does not coincide with the rotation axis, the gravity center of the probe module is located on the installation side of the probe, and in a natural state, the probe installation side rotates downwards under the action of gravity, so that the distance between the probes on the two sides is larger than the length of the battery holder; when the battery holder loaded with the lithium battery is placed between the probe modules, the inner sides of the probe modules rotate downwards under the pressure action of the battery holder until the lower surfaces of the probe modules abut against the upper surface of the mounting frame, and at the moment, the probes on the two sides abut against the positive electrode and the negative electrode of the corresponding lithium battery respectively. The utility model aims to facilitate the positioning detection of the lithium battery and avoid scratching the electrode.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a test stand for recycling lithium batteries. Background Art

[0002] Power lithium batteries are the power source for new energy vehicles. With the increasing popularity of new energy vehicles, the use of power batteries has also increased year by year. Since the service life of power lithium batteries is approximately six years, when the remaining capacity of the lithium battery falls below 80%, it needs to be replaced from the new energy vehicle. To fully realize the use and economic value of lithium batteries, these retired lithium batteries are screened and reorganized for cascade utilization. During the screening process, retired lithium batteries are tested to eliminate lithium batteries that do not meet the recycling requirements based on appearance, residual energy, voltage, internal resistance, etc.

[0003] During the testing process for lithium battery parameters such as residual energy, voltage, and internal resistance, the batteries need to be loaded onto a test rack. Existing test racks typically have elastic conductive members at both ends. During loading, force must be applied to the batteries to cause the members to elastically deform, which can easily scratch the battery electrodes. Furthermore, during the recycling of large quantities of lithium batteries, automated equipment is often used to screen and sort the batteries. Existing test racks are used to position and load the batteries. This complex and difficult-to-control loading process increases costs and increases the risk of failure. Utility Model Content

[0004] The purpose of the present utility model is to solve the above-mentioned problems and provide a test stand for lithium battery recycling, which is used to position and load lithium batteries during the automated recycling process of lithium batteries, thereby facilitating the testing of lithium batteries and avoiding scratching of electrodes during the loading process.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a test stand for lithium battery recycling, comprising a base, a mounting frame installed on the base and two probe modules symmetrically installed on the mounting frame, wherein a plurality of probes are provided on the probe module, and the probes are connected to the battery tester. The probe module has the freedom to rotate in the vertical direction and its center of gravity does not coincide with the rotation axis. The center of gravity of the probe module is located on the installation side of the probe. In the natural state, the installation side of the probe rotates downward under the action of gravity so that the distance between the probes on both sides is greater than the width of the battery holder. When the battery holder carrying the lithium battery is placed between the probe modules, the inner side of the probe module rotates downward under the pressure of the battery holder until its lower surface abuts against the upper surface of the mounting frame. At this time, the probes on both sides respectively abut against the positive and negative poles of the corresponding lithium battery.

[0006] When loading lithium batteries into the test frame, the robot simply places the battery holder containing the lithium battery between the probe modules, facilitating automated operation. During placement, the bottom of the battery holder contacts the inside of the probe module, and its gravity presses the inside of the probe module downward, causing the probe module to rotate inward until its lower surface, supported by the upper surface of the mounting frame, stops rotating. During this process, the probes on both sides rotate inward from the outside until they contact the positive and negative electrodes of the lithium battery, connecting the lithium battery to the battery tester for testing. Because the probes contact the lithium battery from the outside inward, scratching the battery electrodes is avoided.

[0007] Furthermore, the probe module includes a rotating plate and rotating shafts installed at the front and rear ends of the rotating plate. The rotating plate has an L-shaped cross-section, and the probe is installed inside the vertical portion of the rotating plate. Its function is to open and close the probe by rotating the rotating plate around the rotating shaft.

[0008] Furthermore, two rotating shaft seats are installed at the front and rear ends of the mounting frame, and bearings are installed on the rotating shaft seats. The rotating shaft is installed on the inner ring of the bearings. Its function is to facilitate the installation of the probe module and ensure smooth rotation of the rotating shaft.

[0009] Furthermore, the rotating plate includes a pressure-bearing portion that is horizontal in its working state, a counterweight portion that is perpendicular to the pressure-bearing portion, and shaft mounting holes on both sides for mounting the rotating shaft. The center of gravity of the rotating plate is located on the counterweight portion. A plurality of probe mounting positions are spaced above the counterweight portion. Each probe mounting position has a probe mounting hole, and the probe is installed in the probe mounting hole. The function of the probe mounting hole is to rotate the counterweight portion downward in its natural state, ensuring that the distance between the two probes is greater than the length of the lithium battery before the lithium battery to be tested is placed.

[0010] Furthermore, the base has a U-shaped cross-section, and in its natural state, the outer side of the counterweight abuts the inner wall of the base. This allows the inner wall of the base to support the outer side of the counterweight, ensuring that the distance between the pressure-bearing portions of the two rotating plates is less than the width of the battery holder. This ensures that when the battery holder is inserted, the pressure-bearing portions can be pressed down, allowing the probe to contact the lithium battery electrodes.

[0011] Furthermore, the corners of the rotating plate are provided with chamfers or rounded corners, which are used to avoid interference when the rotating plate rotates.

[0012] Furthermore, a plurality of wire grooves are provided at intervals on the bottom of the mounting frame, and the positions of the wire grooves correspond to the probes one by one. The purpose of the wire grooves is to facilitate the routing of the probe connection wires and make the overall test frame more concise and beautiful.

[0013] Furthermore, the probe includes a probe seat, a probe installed in the probe seat, a spring installed between the probe and the inner wall of the probe seat, and a connecting wire connected to the probe. Its function is to ensure that each probe can contact the corresponding electrode during the detection process.

[0014] Furthermore, the end face edge of the probe has rounded corners to avoid scratching the electrode during the contact process.

[0015] Combined with the above technical solutions, compared with the existing technology, the present invention has the following beneficial effects:

[0016] The utility model provides a test stand for lithium battery recycling. When loading lithium batteries, the manipulator only needs to place the battery holder loaded with lithium batteries between the probe modules to complete the loading of the lithium batteries in the test stand, which is convenient for automated operation. Since the lithium battery loading action is simple, the structure and control of the manipulator are also relatively simple, thereby reducing the manufacturing cost and control difficulty of the manipulator and improving the functional stability of the manipulator. During the loading process of the lithium battery, the probe gradually approaches the electrode of the lithium battery by rotating from the outside to the inside, thereby avoiding scratching the electrode during the loading process. After the loading is completed, the gravity of the battery holder and the lithium battery keeps the pressure-bearing part in contact with the upper surface of the mounting frame, thereby ensuring that the end face of the probe can continuously and stably adhere to the electrode, ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a test stand for lithium battery recycling described in the utility model.

[0018] Figure 2 This is an exploded view of a test stand for lithium battery recycling described in the present invention.

[0019] Figure 3 It is a schematic diagram of the position of the probe module of the present invention in a natural state.

[0020] Figure 4 It is a structural schematic diagram of the rotating plate described in the utility model.

[0021] Figure 5 It is a cross-sectional view of the probe described in the present utility model.

[0022] Among them: 1-base, 2-mounting frame, 21-wire trough, 3-probe module, 31-rotating plate, 311-pressure-bearing part, 312-counterweight part, 313-probe mounting position, 314-probe mounting hole, 315-chamfer, 316-rotating shaft mounting hole, 32-rotating shaft, 33-probe, 331-probe seat, 332-probe, 333-connecting wire, 334-spring, 4-bearing, 5-rotating shaft seat, 6-lithium battery, 7-battery seat. DETAILED DESCRIPTION

[0023] In order to explain the technical features and the achieved objectives and effects of the present invention in detail, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Please see the attached Figure 1-5 , a test stand for lithium battery recycling, comprising a base 1, a mounting frame 2 mounted on the base 1 and two probe modules 3 symmetrically mounted on the mounting frame 2, wherein the probe module 3 is provided with a plurality of probes 33, and the probes 33 are connected to a battery tester (not shown in the figure), and the probe module 3 has the freedom to rotate in the vertical direction and its center of gravity does not coincide with the rotation axis, and the center of gravity of the probe module 3 is located on the mounting side of the probe 33. In the natural state, the mounting side of the probe rotates downward under the action of gravity so that the distance between the probes 33 on both sides is greater than the width of the battery holder 7. When the battery holder 7 carrying the lithium battery 6 is placed between the probe modules 3, the inner side of the probe module 3 is rotated downward under the pressure of the battery holder 7 until its lower surface abuts against the upper surface of the mounting frame 2. At this time, the probes 33 on both sides respectively abut against the positive and negative poles of the corresponding lithium battery 6.

[0025] In the above embodiment, since the center of gravity of the probe module 3 is located on the installation side of the probe 33, the installation side of the probe 33 will naturally tilt downward, so that the distance between the probes 33 on both sides is greater than the width of the battery holder 7, thereby preventing the battery holder 7 from contacting the probes 33 during placement. During the process of loading the lithium battery, after the manipulator reaches the top of the test frame, it moves downward to place the battery holder 7 between the probe modules 3. During the placement process, the gravity of the battery holder 7 and the lithium battery 6 presses the inner side of the probe module 3 downward until its lower surface contacts the upper surface of the mounting frame 2. At this time, the probes 33 on both sides respectively abut the corresponding positive and negative electrodes of the lithium battery 6, connecting the lithium battery 6 to the battery tester to complete the test. Since the probes 33 contact the electrodes of the lithium battery 6 from the outside to the inside, scratching the electrodes of the lithium battery 6 during the loading process can be avoided.

[0026] Based on the above embodiment, the probe module 3 includes a rotating plate 31 and a rotating shaft 32 mounted at the front and rear ends of the rotating plate 31. The rotating plate 31 has an L-shaped cross-section, wherein the portion of the rotating plate 31 in a horizontal working state is a pressure-bearing portion 311, and the portion in a vertical state is a counterweight portion 312. The probe 33 is mounted on the inner side of the counterweight portion 312. The front and rear ends of the rotating plate 31 are provided with rotating shaft mounting holes 316 for mounting the rotating shaft 32. The front and rear ends of the mounting frame 2 are respectively provided with two rotating shaft seats 5, each of which is provided with a bearing 4, and the rotating shaft 32 is mounted on the inner ring of the bearing 4. The center of gravity of the rotating plate 31 is located at the counterweight portion 312. A plurality of probe mounting positions 313 are spaced apart above the counterweight portion 312. Each probe mounting position 313 is provided with a probe mounting hole 314, and the probe 33 is mounted in the probe mounting hole 314. The cooperation between the rotating shaft 32 and the bearing 4 can make the rotating plate 31 rotate more smoothly. The spaced arrangement of the probe mounting positions 313 can reduce the weight of the counterweight part 312, ensuring that the weight of the battery holder 7 and the lithium battery 6 can easily press down the pressure-bearing part 311.

[0027] Based on the above embodiment, the cross section of the base 1 is U-shaped. In the natural state, the outer side surface of the counterweight portion 312 abuts against the inner wall of the base 1, so that the distance between the pressure-bearing portions on both sides is smaller than the width of the battery holder 7, so that the battery holder 7 can contact the upper surface of the pressure-bearing portion 311 during the lowering process. Due to the supporting effect of the side wall of the base 1, the width of the pressure-bearing portion 311 can also be reduced, thereby reducing the overall weight of the rotating plate 31.

[0028] Based on the above embodiment, the corners of the rotating plate 31 are provided with chamfers 315 to avoid interference between the rotating plate 31 and the upper surface of the mounting bracket 2 during the rotation process. In other embodiments, the chamfers 315 can also be replaced by rounded corners.

[0029] Based on the above embodiment, a plurality of wire grooves 21 are provided at intervals on the bottom of the mounting frame 2 . The positions of the wire grooves 21 correspond to the probes 33 one by one, so as to facilitate wiring and make the overall appearance of the test frame simple and beautiful.

[0030] Based on the above embodiment, the probe 33 includes a probe seat 331, a probe 332 installed in the probe seat 331, a spring 334 installed between the probe 332 and the inner wall of the probe seat 331, and a connecting wire 333 connected to the probe 332. The end face edge of the probe 332 has rounded corners to avoid scratching the electrode during contact with the electrode. The spring 334 allows the probe 332 to have a certain degree of freedom of linear motion. In the natural state, when the counterweights 312 on both sides are parallel, the distance between the end faces of the probes 332 on both sides is less than the length of the lithium battery 6. When the lithium battery 6 is loaded, the probe 332 is subjected to the pressure of the lithium battery 6 electrode and shrinks inward for a distance to ensure that each probe 332 is in stable contact with the corresponding electrode, thereby avoiding poor contact due to processing errors or installation errors that affect the detection results. To facilitate the installation of the probe 332, the probe base 331 is a split upper and lower structure. The probe 332 is provided with a stop step to prevent the probe 332 from sliding outward and to facilitate the position of the spring 334. After the probe 332 is installed, the upper and lower parts of the probe base 331 are closed and fixed. For example, the upper and lower parts of the probe base 331 can be fixed by snapping or gluing.

[0031] The above description of the present invention and its embodiments is non-limiting. The accompanying drawings only show some embodiments of the present invention, and the actual structure is not limited thereto. Persons skilled in the art will be inspired by the above description and may make various modifications, improvements, and substitutions without departing from the concept of the present invention, all of which shall fall within the scope of protection of the present invention.

Claims

1. A test stand for lithium battery recycling, characterized by: It includes a base, a mounting frame installed on the base and two probe modules symmetrically installed on the mounting frame. The probe module is provided with a plurality of probes, and the probes are connected to the battery tester. The probe module has the freedom to rotate in the vertical direction and its center of gravity does not coincide with the rotation axis. The center of gravity of the probe module is located on the installation side of the probe. In the natural state, the installation side of the probe rotates downward under the action of gravity so that the distance between the probes on both sides is greater than the width of the battery holder. When the battery holder carrying the lithium battery is placed between the probe modules, the inner side of the probe module rotates downward under the pressure of the battery holder until its lower surface abuts against the upper surface of the mounting frame. At this time, the probes on both sides respectively abut against the positive and negative poles of the corresponding lithium battery.

2. A test stand for recycling lithium batteries according to claim 1, characterized in that: The probe module includes a rotating plate and rotating shafts installed at the front and rear ends of the rotating plate. The cross section of the rotating plate is L-shaped, and the probe is installed on the inner side of the vertical part of the rotating plate.

3. A test stand for recycling lithium batteries according to claim 2, characterized in that: Two rotating shaft seats are respectively installed at the front and rear ends of the mounting frame, bearings are installed on the rotating shaft seats, and the rotating shaft is installed on the inner ring of the bearing.

4. A test stand for recycling lithium batteries according to claim 2, characterized in that: The rotating plate includes a pressure-bearing part which is in a horizontal state in a working state, a counterweight part which is perpendicular to the pressure-bearing part, and a rotating shaft mounting hole on both sides for installing the rotating shaft. The center of gravity of the rotating plate is located at the counterweight part. A plurality of probe mounting positions are arranged at intervals above the counterweight part. The probe mounting positions are provided with a probe mounting hole, and the probe is installed in the probe mounting hole.

5. A test stand for recycling lithium batteries according to claim 4, characterized in that: The cross section of the base is U-shaped, and in a natural state, the outer side surface of the counterweight portion abuts against the inner wall of the base.

6. A test stand for recycling lithium batteries according to claim 2, characterized in that: The corners of the rotating plate are provided with chamfers or rounded corners.

7. The test stand for lithium battery recycling according to claim 1, characterized in that: A plurality of wire grooves are arranged at intervals on the bottom of the mounting frame, and the positions of the wire grooves correspond one to one to the probes.

8. The test stand for lithium battery recycling according to claim 1, characterized in that: The probe comprises a probe seat, a probe installed in the probe seat, a spring installed between the probe and an inner wall of the probe seat, and a connecting line connected to the probe.

9. A test stand for recycling lithium batteries according to claim 8, characterized in that: The edge of the end surface of the probe is rounded.

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