Charging and discharging testing device

Abstract

The utility model relates to the technical field of battery testing, and discloses a charging and discharging testing device. The device comprises a device table and a conductive assembly, a plurality of cylindrical lithium batteries are horizontally placed on the device table side by side; the conductive assembly is mounted on the device table; the charging and discharging test device further comprises a test positioning mechanism, and the test positioning mechanism can drive the conductive assembly to move and electrically connect with the end electrode of each lithium battery to carry out a power-on test while tightly holding each lithium battery along the radial direction. According to the utility model, the test efficiency is improved, a plurality of lithium batteries can be tested at one time, and time and labor cost are saved.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, specifically a charge and discharge testing device. Background Technology

[0002] A lithium-ion battery pack is a single physical module composed of multiple lithium-ion battery cells. It offers higher voltage and capacity and has specific output functions. Lithium-ion battery packs are mainly used to meet the needs of daily life, such as in power bank chargers, home electronic appliances, and solar charging. Simultaneously, lithium-ion battery packs are also the core energy source for new energy vehicles, providing the driving power for the entire vehicle. Cylindrical lithium-ion batteries are a common type of lithium-ion battery, and battery packs composed of them have a wide range of applications.

[0003] Currently, lithium batteries need to undergo charge and discharge performance testing before assembly. The traditional testing method is to manually fix the battery, then connect the wire contact head to the battery end electrode, and then conduct a charge and discharge test after power is applied. This method is not only less safe but also less efficient. Since a battery pack generally contains four to five lithium batteries, individual testing and manual fixing are inconvenient and cannot meet the usage requirements, so a solution is urgently needed. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a charge and discharge testing device that can test multiple lithium batteries at once, thereby improving testing efficiency and saving time and labor costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a charge-discharge testing device, characterized in that it includes a device platform and a conductive component; multiple lithium batteries are horizontally placed side by side on the device platform; the conductive component is installed on the device platform; the charge-discharge testing device also includes a test positioning mechanism, which can drive the conductive component to electrically connect with the end electrodes of each lithium battery while holding each lithium battery tightly to perform a power-on test.

[0007] This invention utilizes a testing and positioning mechanism to simultaneously hold multiple lithium batteries and drive conductive components to achieve electrical connection with the end electrodes of the lithium batteries, thereby enabling power-on testing. This method improves testing efficiency, allowing multiple lithium batteries to be tested at once, saving time and labor costs.

[0008] As a further improvement to the above solution, the conductive component includes a conductive head that is slidably mounted on the device stage; the conductive head corresponds one-to-one with the end electrode of the lithium battery and can contact the end electrode under the action of the test positioning mechanism to achieve electrical connection.

[0009] This invention, by setting multiple conductive heads, can flexibly contact batches of lithium batteries, thus improving the testing efficiency for lithium battery packs.

[0010] As a further improvement to the above solution, the test positioning mechanism includes a first pressure plate and a second pressure plate; the first pressure plate is used to press down on the lithium battery, and the second pressure plate can be driven by the transmission component during the pressing process to make its attached conductive head contact the end electrode.

[0011] During the process of the first pressure plate pressing down on the lithium battery, the transmission component drives the second pressure plate to slide horizontally, thereby bringing the conductive head into contact with the electrode of the lithium battery. This further simplifies the operation process and ensures close contact between the conductive head and the electrode, so as to assist in the completion of battery performance testing.

[0012] As a further improvement to the above solution, the test positioning mechanism also includes a horizontal plate and a vertical plate; the horizontal plate can move up and down above the device platform, and the first pressure plate is connected to the bottom of the horizontal plate through a first elastic element; the two vertical plates are fixedly connected to the device platform, and the two second pressure plates are respectively connected to the opposite inner sides of the two vertical plates through second elastic elements.

[0013] This invention connects the first pressure plate and the horizontal plate using a first elastic element, ensuring that the horizontal plate can continue to move for a certain period after the first pressure plate contacts the battery pack. Connecting the second pressure plate and the vertical plate using a second elastic element provides additional cushioning and stability, allowing the second pressure plate to move more smoothly during testing and reducing testing errors caused by vibration or impact.

[0014] As a further improvement to the above solution, the transmission assembly includes a first inclined block fixedly connected to the horizontal plate and a second inclined block fixedly connected to the second pressure plate; the inclined surfaces of the first inclined block and the second inclined block are in contact and can slide relative to each other.

[0015] This invention features ball grooves and balls on the inclined block, which reduces friction between the inclined surfaces and makes the relative sliding between them smoother, thereby improving the response speed and accuracy of the test positioning mechanism.

[0016] As a further improvement to the above solution, the charge and discharge test device also includes a battery holder set on the device platform; the top of the battery holder and the bottom of the first pressure plate are respectively provided with grooves corresponding to multiple lithium batteries, and the grooves of the two form a space that can accommodate the lithium batteries when they are close to each other, thereby achieving the goal of holding the lithium batteries tightly.

[0017] This invention ensures the stability and safety of lithium batteries during testing by radially clamping them. This solution also makes it easier to position and fix lithium batteries.

[0018] As a further improvement to the above solution, each of the four corners of the bottom of the first pressure plate is fixed with a plug, and the plug can be inserted into the corresponding opening at the top of the battery holder. This prevents the lithium battery from loosening or shifting during testing, thereby improving the accuracy of the test.

[0019] The insertion rod and opening of this utility model further enhance the connection stability between the first pressure plate and the battery holder, preventing the lithium battery from loosening or shifting during the test, thereby improving the accuracy of the test.

[0020] As a further improvement to the above solution, the battery holder is slidably installed in a groove opened on the device platform, and the device platform is also provided with an adjustment mechanism for driving the battery holder to slide along the extension direction of the groove.

[0021] The adjustment mechanism and slide design of this utility model enable the battery holder to move and be positioned flexibly on the device platform, allowing the testing device to adapt to different numbers and sizes of lithium batteries, thus improving the flexibility and compatibility of the test.

[0022] As a further improvement to the above solution, when the groove on the battery holder is located directly below the groove on the first pressure plate, one side of the battery holder is in contact with a side wall of the slide, and a rubber pad is provided on the contact surface between the battery holder and the slide.

[0023] When the battery holder is in a specific position, the fit with the sidewall of the slide and the use of rubber pads further enhance the stability and safety during the testing process, reduce testing errors caused by vibration or impact, and protect the lithium battery from damage.

[0024] As a further improvement to the above solution, the charge and discharge test device also includes a detector, which is electrically connected to each conductive head via wires, and the detector is equipped with a number of fault indicator lights corresponding to the number of lithium batteries.

[0025] By placing the testing equipment directly on the lifting frame, personnel can promptly identify and address lithium battery faults during testing operations, gaining a clear and intuitive understanding of the status of each lithium battery.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] This invention, by arranging lithium battery packs side by side and setting up a test positioning mechanism, can locate and connect multiple lithium batteries at once, improving testing efficiency and saving time and labor costs. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the charge-discharge testing device in an embodiment of this utility model.

[0029] Figure 2 for Figure 1 A three-dimensional structural diagram of the charge-discharge test device from another perspective.

[0030] Figure 3 for Figure 1 Front view of the charge-discharge test device.

[0031] Figure 4 This is a three-dimensional structural diagram of the test positioning mechanism in an embodiment of this utility model.

[0032] Figure 5 This is a front view of the test positioning mechanism in an embodiment of this utility model.

[0033] Figure 6 This is a three-dimensional structural diagram of the inclined block two in this embodiment of the present utility model.

[0034] Figure 7 This is a three-dimensional structural diagram of the battery holder in an embodiment of the present utility model.

[0035] In the diagram: 1. Device platform; 10. Slide groove; 2. Lifting frame; 21. Power source; 22. Horizontal plate; 23. Detector; 230. Wire; 3. Battery holder; 30. Opening; 4. Test positioning mechanism; 41. First pressure plate; 411. Insert rod; 42. Second pressure plate; 43. Inclined block one; 44. Inclined block two; 45. First elastic element; 46. Second elastic element; 47. Vertical plate; 5. Conductive component; 51. Conductive head; 6. Ball bearing; 7. Screw; 8. Rubber pad; 9. Lithium battery. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1 to 7 This embodiment provides a charge and discharge testing device, including a device platform 1, a lifting frame 2, a battery holder 3, a test positioning mechanism 4, and a conductive component 5.

[0038] Five cylindrical lithium batteries 9 are placed horizontally side by side on the device platform 1; conductive components 5 are installed on the device platform 1; the charge and discharge test device also includes a test positioning mechanism 4, which can drive the conductive components 5 to move and electrically connect with the end electrodes of each lithium battery 9 to perform power-on test while holding each lithium battery 9 radially.

[0039] In some embodiments, the lithium battery 9 can be a round battery (cylindrical) or a square battery (prismatic), or other shapes, which are not limited here. It should be noted that when the shape of the lithium battery 9 is changed, the shape of the groove in the first pressure plate 41 in the test positioning mechanism 4 and the shape of the groove on the battery holder 3 need to be adapted accordingly.

[0040] Furthermore, the positive and negative electrodes of the lithium battery 9 are not limited to being located at both ends of the battery; they can also be located at the same end. It should be noted that when the electrode distribution of the lithium battery changes, the number and distribution of the conductive heads 51 on the first pressure plate 41 also need to be adjusted accordingly.

[0041] This invention utilizes a test positioning mechanism 4 to simultaneously hold multiple lithium batteries 9 and drive the conductive component 5 to electrically connect with the end electrodes of the lithium batteries 9, thereby enabling power-on testing. This method improves testing efficiency, allowing multiple lithium batteries 9 to be tested simultaneously, saving time and labor costs.

[0042] The conductive component 5 includes two rows of conductive heads 51 (a total of 2×5=10, one row corresponding to the positive electrode and the other row corresponding to the negative electrode) that can be slidably disposed on the stage 1 along the axial direction of the lithium battery 9. The two rows of conductive heads 51 correspond one-to-one with the end electrodes of the five lithium batteries 9, and can make contact with the corresponding end electrodes under the action of the test positioning mechanism 4 to achieve electrical connection, ensuring that each lithium battery 9 can be accurately tested.

[0043] The lifting frame 2 is equipped with a horizontal plate 22 located above the device platform 1 and driven to rise and fall by a power source 21. The power source 21 can be a linear actuator such as an electric push rod or a cylinder, or it can be a traditional manual drive structure, such as an elbow clamp (which uses the lever principle to achieve linear movement of the horizontal plate 22 and has a locking function). This method simplifies the operation process, improves the degree of automation, and ensures that the lithium battery 9 is fixed in the appropriate position during performance testing.

[0044] A detector 23 can also be fixedly installed on the lifting frame 2. The detector 23 is electrically connected to each conductive head 51 in the conductive component 5 via wires 230, and the detector 23 is equipped with five sets of fault indicator lights. The detector 23 can detect and record the test data of each lithium battery 9 in real time, and the fault indicator lights can intuitively display the test status of each lithium battery, facilitating timely detection and handling of faults. It should be noted that the detector 23 is existing technology, and its detailed principle will not be elaborated here.

[0045] The test positioning mechanism 4 includes a first pressure plate 41, a second pressure plate 42, an inclined block 43, an inclined block 44, and a vertical plate 47.

[0046] The first pressure plate 41 is slidably connected to the bottom of the horizontal plate 22 along the height direction, and a first elastic element 45 is provided between the first pressure plate 41 and the horizontal plate 22; two second pressure plates 42 are provided, both of which are slidably connected to the device platform 1 along the axial direction of the lithium battery 9, and multiple lithium batteries 9 are located between the two second pressure plates 42; two rows of conductive heads 51 are respectively fixedly connected to the opposite inner sides of the two second pressure plates 42; two inclined blocks 43 are provided, both of which are fixedly connected to the bottom of the horizontal plate 22; two inclined blocks 44 are provided, and are respectively fixedly connected to the top of the two second pressure plates 42; the two inclined blocks 44 and the two inclined blocks 43 can generate relative sliding between the inclined surfaces, thereby driving the second pressure plates 42 to slide horizontally when the horizontal plate 22 is raised and lowered.

[0047] By combining the horizontal plate 22, the first pressure plate 41, the second pressure plate 42, the inclined block 1 43, and the inclined block 2 44, the second pressure plate 42 is driven to slide horizontally by the inclined sliding principle when the horizontal plate 22 is raised and lowered, thereby making the conductive head 51 contact the electrode of the lithium battery 9. This simplifies the operation process and ensures close contact between the conductive head 51 and the electrode, so as to assist in the completion of battery performance testing.

[0048] Two vertical plates 47 are fixedly connected to the device platform 1; two second pressure plates 42 are respectively connected to the opposite inner sides of the two vertical plates 47 via second elastic elements 46. The second elastic elements 46 allow the second pressure plates 42 to slide more smoothly under the force of the inclined block 42, and to automatically reset after the test. This improves the stability and repeatability of the test.

[0049] The first elastic element 45 can be an elastic telescopic rod, and the second elastic element 46 can be a spring.

[0050] In this embodiment, the inclined surface of the second inclined block 44 is provided with a matrix of ball grooves, and the ball grooves are connected to the rolling balls 6, so as to achieve relative sliding with the inclined surface of the first inclined block 43, thereby reducing the frictional resistance between the inclined surfaces, making the sliding smoother, and reducing energy consumption and wear.

[0051] The battery holder 3 is set on the device platform 1; the top of the battery holder 3 and the bottom of the first pressure plate 41 are respectively provided with semi-circular grooves corresponding to multiple lithium batteries 9. When the semi-circular grooves of the two are close to each other, they form a cylindrical space that can accommodate the lithium batteries 9, thereby holding the lithium batteries 9 tightly in the radial direction, ensuring that the lithium batteries 9 will not shake or fall off during the test, thus improving the safety and accuracy of the test.

[0052] Each of the four corners of the bottom of the first pressure plate 41 is fixed with a plug rod 411, and the plug rod 411 can be inserted into the corresponding opening 30 on the top of the battery holder 3 to prevent the battery holder 3 from shifting during the test.

[0053] The device platform 1 has a sliding groove 10, within which the battery holder 3 is slidably disposed. A screw 7, parallel to the sliding direction of the battery holder 3, is rotatably connected within the sliding groove 10. The screw 7 is threadedly connected to the battery holder 3. Rotating the screw 7 allows for sliding adjustment of the battery holder 3 on the device platform 1, facilitating the adjustment of the lithium battery 9's position according to actual needs and improving the flexibility and applicability of the test. Of course, in some embodiments, the screw 7 may not be provided; the positioning effect can also be achieved solely through the sliding of the battery holder 3 within the sliding groove, in conjunction with the aforementioned insertion rod 411.

[0054] When the semi-circular groove on the battery holder 3 is directly below the semi-circular groove on the first pressure plate 41, one side of the battery holder 3 is in contact with a side wall of the slide 10, and a rubber pad 8 is provided on the contact surface between the battery holder 3 and the slide 10. When the battery holder 3 is in contact with the side wall of the slide 10, the rubber pad 8 can reduce friction and vibration, and protect the battery holder 3 and the slide 10 from damage.

[0055] Working principle: During testing, a set of batteries, namely five cylindrical lithium batteries 9, is placed in the five semi-circular grooves on the top of the battery holder 3. Then, the screw 7 can be rotated, causing the sides of the battery holder 3 to slide against the inner wall of the opening of the device platform 1. After the battery holder 3 moves to the innermost end and the screw 31 can no longer be rotated, the semi-circular grooves of the battery holder 3 and the first pressure plate 41 are aligned. Then, the electric push rod is activated, causing the horizontal plate 22 to descend. At this time, the inclined block 1 43 presses against the inclined block 2 44, causing the cuboid second pressure plate 42 to slide. In this process, the first pressure plate 41 first fits against the battery holder 3, and the upper and lower semi-circular grooves form a groove to press down the lithium battery 9. As the elastic telescopic rod contracts, the horizontal plate 22 can continue to descend, allowing the second pressure plates 42 at both ends to continue sliding. Finally, the five conductive heads 51 at both ends make stable contact with the terminals at both ends of the battery. Then, the detector 23 is activated to charge and discharge, completing the tests of voltage, current, and resistance.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A charge / discharge testing device, characterized in that, The device includes a platform (1) and a conductive component (5); multiple lithium batteries (9) are placed horizontally on the platform (1); the conductive component (5) is installed on the platform (1); the charge and discharge test device also includes a test positioning mechanism (4), which can hold each lithium battery (9) tightly while driving the conductive component (5) to achieve electrical connection with the end electrode of each lithium battery (9) for power-on test.

2. The charge / discharge testing device according to claim 1, characterized in that, The conductive component (5) includes a conductive head (51) that is slidably disposed on the stage (1); the conductive head (51) corresponds one-to-one with the end electrode of the lithium battery (9) and can contact the end electrode under the action of the test positioning mechanism (4) to achieve electrical connection.

3. The charge / discharge testing device according to claim 2, characterized in that, The test positioning mechanism (4) includes a first pressure plate (41) and a second pressure plate (42); the first pressure plate (41) is used to press down the lithium battery (9), and the second pressure plate (42) can be driven by the transmission component during the pressing process to make the conductive head (51) attached to it contact the end electrode.

4. The charge / discharge testing device according to claim 3, characterized in that, The test positioning mechanism (4) also includes a horizontal plate (22) and a vertical plate (47); the horizontal plate (22) can move up and down above the device platform (1), and the first pressure plate (41) is connected to the bottom of the horizontal plate (22) through the first elastic element (45); the two vertical plates (47) are fixedly connected to the device platform (1), and the two second pressure plates (42) are respectively connected to the opposite inner sides of the two vertical plates (47) through the second elastic element (46).

5. The charge / discharge testing device according to claim 3, characterized in that, The transmission assembly includes a first inclined block (43) fixedly connected to the horizontal plate (22) and a second inclined block (44) fixedly connected to the second pressure plate (42); the inclined surfaces of the first inclined block (43) and the second inclined block (44) are in contact and can slide relative to each other.

6. A charge / discharge testing device according to any one of claims 3 to 5, characterized in that, It also includes a battery holder (3) set on the device platform (1); the top of the battery holder (3) and the bottom of the first pressure plate (41) are respectively provided with grooves corresponding to multiple lithium batteries (9), and the grooves of the two form a space that can accommodate the lithium batteries (9) when they are close to each other, so as to hold the lithium batteries (9) tightly.

7. The charge / discharge testing device according to claim 6, characterized in that, The first pressure plate (41) has four fixed insertion rods (411) at the bottom corners, and the insertion rods (411) can be inserted into the corresponding openings (30) at the top of the battery holder (3).

8. The charge / discharge testing device according to claim 6, characterized in that, The battery holder (3) is slidably installed in a groove (10) on the device platform (1), and the device platform (1) is also provided with an adjustment mechanism for driving the battery holder (3) to slide along the extension direction of the groove (10).

9. A charge / discharge testing device according to claim 8, characterized in that, When the groove on the battery holder (3) is located directly below the groove on the first pressure plate (41), one side of the battery holder (3) is in contact with a side wall of the slide (10), and a rubber pad (8) is provided on the contact surface between the battery holder (3) and the slide (10).

10. A charge / discharge testing device according to any one of claims 2 to 5, characterized in that, It also includes a detector (23), which is electrically connected to each conductive head (51) via a wire (230), and the detector (23) is equipped with a number of fault indicator lights corresponding to the number of lithium batteries (9).

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