Lithium battery internal resistance testing device

Abstract

The utility model relates to a testing device, in particular to a lithium battery internal resistance testing device. The lithium battery internal resistance testing device comprises a frame, a resistance detector, a controller, a sliding rail, a graduated scale, a sliding block, a first probe, a screw rod, a pointer and the like, the resistance detector is installed on the right side of the upper portion of the frame, the controller is installed on the right side of the upper portion of the frame and located behind the resistance detector, and the sliding rail is installed on the front side of the upper portion of the frame. A graduated scale is fixedly connected to the front side of the sliding rail, sliding blocks are slidably connected in the sliding rail in a bilateral symmetry mode, first probes are installed on the upper portions of the two sliding blocks, screws are in threaded connection to the right portions of the two sliding blocks, and a pointer is fixedly connected to the middle of the sliding block on the right side. The lithium battery is extruded through the left and right clamping plates and the spring, and then the position of the lithium battery is fixed, so that the problem that lithium battery internal resistance test is affected by shaking caused by inaccurate positioning of the lithium battery is solved, and simplicity and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a lithium battery internal resistance testing device. Background Art

[0002] A lithium battery is a battery with a lithium metal or lithium alloy as the anode material and a non-aqueous electrolyte solution. It includes a cover structure, which includes a positive electrode post, a conductive sheet, a top cover sheet, and a plastic cover plate. The conductive sheet is connected to the positive electrode post, the positive electrode post is insulated and assembled with the top cover sheet, and the plastic cover plate is connected to the top cover sheet. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high requirements for the environment. Therefore, lithium batteries have not been applied for a long time. With the development of microelectronics technology at the end of the 20th century, the number of miniaturized devices has increased day by day, posing very high requirements for power supplies. As a result, lithium batteries have entered the large-scale practical stage.

[0003] Internal resistance is an important indicator to measure the performance of a battery. Under normal circumstances, a battery with a small internal resistance has a strong discharge capacity and can support large-current discharge, while a battery with a large internal resistance has a weak discharge capacity. The internal resistance is like age. Measuring the internal resistance can screen out good and bad batteries and paired batteries. When processing a series battery pack, it is necessary to match the cell capacity, internal resistance, and voltage. The performance of the battery pack follows the "barrel principle", and its performance depends on the worst battery.

[0004] Testing the internal resistance of a lithium battery is an important means to evaluate the battery performance. Currently, the internal resistance of a lithium battery is tested through an internal resistance voltage testing device. However, during the internal resistance testing process, the positioning of the lithium battery is often inaccurate and it is prone to shaking, which in turn easily affects the testing of the internal resistance of the lithium battery.

[0005] Therefore, it is necessary to design a lithium battery internal resistance testing device. Summary of the Utility Model

[0006] In order to overcome the drawback that inaccurate positioning of the lithium battery causes shaking, resulting in affecting the testing of the internal resistance of the lithium battery, the technical problem is to provide a lithium battery internal resistance testing device.

[0007] The technical solution is as follows: A lithium battery internal resistance testing device includes a frame, a resistance detector, a controller, a slide rail, a scale, a slider, a first probe, a screw, a pointer, a guide rod, a support plate, a cylinder, a sliding seat, a sliding sleeve, a second probe, a telescopic rod, a spring, and a clamping plate. The resistance detector is installed on the upper right side of the frame, and the controller is installed on the upper right side of the frame. The controller is located behind the resistance detector. The slide rail is installed on the front side of the upper part of the frame, and the scale is fixedly connected to the front side of the slide rail. The slider is symmetrically and slidably connected to the left and right inside the slide rail. The first probe is installed on the upper part of both sliders. The screw is threadedly connected to the outside of both sliders. The pointer is fixedly connected to the middle of the right slider. The guide rod is symmetrically and fixedly connected to the left and right in the middle of the frame. The support plate is fixedly connected between the tops of the two guide rods. The cylinder is fixedly inserted through the middle of the support plate. The sliding seat is slidably connected between the lower parts of the two guide rods. The sliding sleeve is symmetrically and fixedly connected to the left and right of the sliding seat. The output shaft of the cylinder is fixedly connected to the sliding seat. The second probe is symmetrically and fixedly connected to the front and back of both sliding sleeves. Two telescopic rods are symmetrically and fixedly connected to the left and right in the middle of the frame. The clamping plate is fixedly connected between the telescopic rods on the same side. A spring is provided between the telescopic rod on the same side and the clamping plate. The first probe and the second probe are both electrically connected to the resistance detector, and the cylinder is electrically connected to the controller.

[0008] Preferably, it further includes a pull ring, and the pull ring is fixedly connected to the upper part of the right slider.

[0009] Preferably, it further includes a storage box, and the storage boxes are symmetrically placed on the left and right of the rear part of the frame.

[0010] Preferably, it further includes a foot pad, and a plurality of foot pads are fixedly connected to the bottom of the frame.

[0011] Preferably, it further includes a handle, and the handles are symmetrically and fixedly connected to the left and right of the frame.

[0012] Preferably, the clamping plate is made of soft rubber material.

[0013] The beneficial effects of the present utility model are as follows: 1. The present utility model fixes the position of the lithium battery by squeezing the lithium battery with the clamping plates and springs on the left and right sides, thereby solving the problem that the inaccurate positioning of the lithium battery causes shaking and affects the internal resistance test of the lithium battery, which is simple and fast.

[0014] 2. The present utility model is convenient for quality screening of multiple lithium batteries by setting up a storage box. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of components such as the slider, the first probe, and the screw of the present utility model.

[0017] Figure 3This is a three-dimensional structural schematic diagram of components such as the slider, the first probe, and the screw of the present utility model.

[0018] Figure 4 This is a three-dimensional structural schematic diagram of components such as the telescopic rod, the spring, and the clamping plate of the present utility model.

[0019] Explanation of reference numerals in the drawings: 1 - frame, 2 - resistance detector, 3 - controller, 4 - slide rail, 5 - scale, 6 - slider, 7 - first probe, 8 - screw, 9 - pointer, 10 - guide rod, 11 - support plate, 12 - cylinder, 13 - slide seat, 14 - sliding sleeve, 15 - second probe, 16 - telescopic rod, 17 - spring, 18 - clamping plate, 19 - pull ring, 20 - storage box, 21 - foot pad, 22 - handle. Detailed implementation manners

[0020] The present utility model will be further described below in conjunction with the drawings and the detailed implementation manners.

[0021] Embodiment: A lithium battery internal resistance testing device, as Figures 1-4 shown, includes a frame 1, a resistance detector 2, a controller 3, a slide rail 4, a scale 5, a slider 6, a first probe 7, a screw 8, a pointer 9, a guide rod 10, a support plate 11, a cylinder 12, a slide seat 13, a sliding sleeve 14, a second probe 15, a telescopic rod 16, a spring 17, and a clamping plate 18. The right side of the upper part of the frame 1 is bolted with a resistance detector 2, the right side of the upper part of the frame 1 is bolted with a controller 3, the controller 3 is located behind the resistance detector 2, the front side of the upper part of the frame 1 is equipped with a slide rail 4, the front side of the slide rail 4 is fixedly connected with a scale 5, the slider 6 is symmetrically slidably connected left and right in the slide rail 4, the first probes 7 are installed on the upper parts of the two sliders 6, the screws 8 are threadedly connected to the outer sides of the two sliders 6, the pointer 9 is fixedly connected to the middle of the right slider 6, the guide rods 10 are symmetrically bolted left and right in the middle of the frame 1, a support plate 11 is bolted between the tops of the two guide rods 10, a cylinder 12 is fixedly inserted through the middle of the support plate 11, the slide seat 13 is slidably connected between the lower parts of the two guide rods 10, the output shaft of the cylinder 12 is fixedly connected with the slide seat 13, the sliding sleeves 14 are symmetrically fixedly connected to the left and right of the slide seat 13, the second probes 15 are symmetrically fixedly connected to the front and back of the two sliding sleeves 14, two telescopic rods 16 are symmetrically fixedly connected to the middle of the frame 1, a clamping plate 18 is adhesively bonded between the telescopic rods 16 on the same side, the clamping plate 18 is made of a soft rubber material with good elasticity, springs 17 are arranged between the telescopic rods 16 and the clamping plate 18 on the same side, the first probe 7 and the second probe 15 are both electrically connected to the resistance detector 2, and the cylinder 12 is electrically connected to the controller 3.

[0022] As Figures 1-3 shown, it further includes a pull ring 19, and the pull ring 19 is welded to the upper part of the right slider 6.

[0023] AsFigure 1 As shown, it further includes a storage box 20, and the storage boxes 20 are placed symmetrically on the left and right at the rear of the frame 1.

[0024] As Figure 2 shown, it further includes foot pads 21, and six foot pads 21 are fixedly connected to the bottom of the frame 1.

[0025] As Figure 1 shown, it further includes handles 22, and the handles 22 are symmetrically welded to the left and right of the frame 1.

[0026] The internal resistance test of lithium batteries is an important means to evaluate battery performance. Currently, the internal resistance of lithium batteries is tested through an internal resistance voltage test device. When it is necessary to fix a lithium battery, this device can be used. First, place this device horizontally on the ground through the handle 22, and then turn on the power. According to the size type of lithium batteries, they are divided into cylindrical and square shell types. When the size type of the lithium battery is cylindrical, adjust the distance between the two sliders 6 according to the pointer 9 and the scale 5. Rotate the left screw 8 clockwise to fix the position of the left slider 6. Then pull the pull ring 19 to move it to the left. The pull ring 19 drives the entire right screw 8 to slowly approach the left. After reaching the required adjusted distance, rotate the right screw 8 clockwise to fix the position of the right slider 6. Then place the cylindrical lithium battery horizontally between the two first probes 7 to fix the position of the cylindrical lithium battery, thus completing the fixing work of the position of the cylindrical lithium battery. When it is necessary to perform internal resistance detection and quality screening on the cylindrical lithium battery, immediately start the resistance detector 2. The two first probes 7 transmit signals to the resistance detector 2, and the resistance detector 2 converts them into specific values and displays them. Remove the cylindrical lithium battery. According to the specific value of the internal resistance of the cylindrical lithium battery, place the cylindrical lithium batteries with good quality in one of the storage boxes 20, and place the cylindrical lithium batteries with defective quality in the other storage box 20, thus completing the internal resistance detection and quality screening work of the cylindrical lithium battery.

[0027] When the size type of the lithium battery is square shell type, place the square shell type lithium battery in the middle of the frame 1. Then operate the controller 3 to start the cylinder 12. The output shaft of the cylinder 12 drives the slide seat 13, the sliding sleeve 14 and the second probe 15 to move downward together until the second probe 15 abuts against the top interface of the square shell type lithium battery. Then operate the controller 3 to close the cylinder 12. The two second probes 15 transmit signals to the resistance detector 2, and the resistance detector 2 detects the internal resistance of the square shell type lithium battery. After the detection, start the cylinder 12 through the operation of the controller 3 to take out the square shell type lithium battery, and then perform the quality screening work on the square shell type lithium battery in the same way. When it is necessary to perform internal resistance detection on multiple lithium batteries, repeat the above operations.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A lithium battery internal resistance testing device, characterized in that: It includes a frame (1), a resistance detector (2), a controller (3), a slide rail (4), a scale (5), a slider (6), a first probe (7), a screw (8), a pointer (9), a guide rod (10), a support plate (11), a cylinder (12), a sliding seat (13), a sliding sleeve (14), a second probe (15), a telescopic rod (16), a spring (17) and a clamping plate (18). The resistance detector (2) is installed on the upper right side of the frame (1), and the controller (3) is installed on the upper right side of the frame (1). The controller (3) is located behind the resistance detector (2). The slide rail (4) is installed on the front side of the upper part of the frame (1). The scale (5) is fixedly connected to the slide rail (4). The slider (6) is slidably connected to the inside of the slide rail (4) symmetrically from left to right. The first probe (7) is installed on the upper part of both sliders (6). The screw (8) is threadedly connected to the outside of both sliders (6). The pointer (9) is fixedly connected to the middle of the right slider (6). The guide rod (10) is fixedly connected to the middle of the frame (1) symmetrically from left to right. The support plate (11) is fixedly connected between the tops of both guide rods (10). The cylinder (12) is fixedly inserted through the middle of the support plate (11). The sliding seat (13) is slidably connected between the lower parts of both guide rods (10). The output shaft of the cylinder (12) is fixedly connected to the sliding seat (13). The sliding sleeve (14) is fixedly connected to the sliding seat (13) symmetrically from left to right. The second probe (15) is fixedly connected to both sliding sleeves (14) symmetrically from front to back. The telescopic rod (16) is fixedly connected to the middle of the frame (1) symmetrically from left to right. The clamping plate (18) is fixedly connected between the telescopic rods (16) on the same side. The spring (17) is arranged between the telescopic rod (16) and the clamping plate (18) on the same side. The first probe (7) and the second probe (15) are both electrically connected to the resistance detector (2). The cylinder (12) is electrically connected to the controller (3).

2. The lithium battery internal resistance testing device according to claim 1, characterized in that: It further includes a pull ring (19). The pull ring (19) is fixedly connected to the upper part of the right slider (6).

3. The lithium battery internal resistance testing device according to claim 1, characterized in that: It further includes a storage box (20). The storage box (20) is placed symmetrically on the left and right sides of the rear part of the frame (1).

4. The internal resistance testing device for a lithium battery according to claim 1, wherein: It further includes a foot pad (21). A plurality of foot pads (21) are fixedly connected to the bottom of the frame (1).

5. A lithium battery internal resistance testing device according to claim 1, characterized in that: It further includes a handle (22). The handle (22) is fixedly connected to the frame (1) symmetrically from left to right.

6. The internal resistance testing device for a lithium battery according to claim 1, wherein: The clamping plate (18) is made of soft rubber material.

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