Lithium battery OCV testing device
By designing an adjustable detection terminal position and height lithium battery OCV testing device, the problem of insufficient adaptability of existing devices is solved, enabling flexible testing of different types of lithium batteries.
Patent Information
- Application Number
- CN202423225841.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing lithium battery OCV testing equipment is difficult to adapt to different types of lithium batteries, resulting in inflexible testing.
A lithium battery OCV testing device with adjustable detection terminals in terms of position, front-back, left-right, and height was designed. The terminal can be flexibly adjusted by components such as longitudinal and lateral adjustment screws, lifting drive modules, and vertical cylinders to adapt to different types of lithium batteries.
It enables flexible testing of different types of lithium batteries, improving the adaptability and accuracy of the testing.
Smart Images
Figure CN223827792U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of batteries, specifically to lithium battery testing equipment. Background Technology
[0002] The voltage of a battery when no load is connected is called the open-circuit voltage. On lithium-ion battery cell production lines, measuring the open-circuit voltage is a crucial step in detecting defective products. Because batteries have self-discharge characteristics, the open-circuit voltage gradually decreases. If a battery has internal defects, it will generate more self-discharge. On the production line, batteries with open-circuit voltages below the specified value are rejected as defective products. During testing, the lithium-ion battery is positioned beside the testing device, with its tabs placed flat between the testing terminals and the testing plate. The testing plate descends, bringing the battery tabs into contact with the testing terminals to obtain the open-circuit voltage, thus achieving the lithium-ion battery OCV (Open Circuit Voltage) test. Utility Model Content
[0003] The technical problem solved by this invention is: how to adapt the lithium battery OCV testing device to different types of lithium batteries.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lithium battery OCV testing device, including a bracket, a vertical cylinder mounted on the bracket, a test pressure plate connected to the vertical cylinder, and a detection terminal mounted on the bracket and located below the test pressure plate. The detection terminal is mounted on a terminal module. The bracket is mounted on a horizontal longitudinal adjustment plate, which is fitted onto a horizontal transverse adjustment plate. The horizontal transverse adjustment plate is fitted onto a base plate. A longitudinal adjustment screw is provided between the horizontal longitudinal adjustment plate and the horizontal transverse adjustment plate, and a transverse adjustment screw is provided between the horizontal transverse adjustment plate and the base plate.
[0005] The terminal module includes a terminal base and a terminal block. The detection terminal is set on the terminal block, and the terminal block is set on the terminal base. The terminal base is movably fitted on the bracket. The bracket is provided with a lifting drive module, which can lift the terminal base. The terminal base is provided with a row of terminal base positioning holes, and the terminal block is provided with terminal block positioning holes. The positioning pin is inserted into the terminal block positioning holes and the terminal base positioning holes that are aligned vertically.
[0006] According to the above technical solution, the worker rotates the longitudinal adjusting screw, driving the horizontal longitudinal adjusting plate to move longitudinally relative to the horizontal transverse adjusting plate, thereby adjusting the front-to-back position of the bracket and its onboard detection terminals and test plate. The worker rotates the transverse adjusting screw, driving the horizontal transverse adjusting plate to move laterally relative to the base plate, thereby adjusting the left-to-right position of the bracket and its onboard detection terminals and test plate. The lifting drive module drives the terminal block to rise and fall, thereby adjusting the height of the detection terminals. The worker pulls out the positioning pin, which allows adjustment of the distance between the two detection terminals on the terminal block. Once the distance is appropriate, the positioning pin is used to fix the position of the detection terminals.
[0007] During testing, the lithium battery is positioned beside the testing device, with its tabs placed flat between the testing terminals and the testing plate. The testing plate descends, bringing the lithium battery tabs into contact with the testing terminals to obtain the open-circuit voltage (OCV) of the lithium battery, thus achieving OCV testing. This invention allows for adjustment of the front-back, left-right, and height positions of the testing terminals, as well as the distance between the two testing terminals, to accommodate testing different types of lithium batteries.
[0008] The test plate has a slotted groove on its bottom surface. The head of the fastening bolt fits into the slot, and the center hole of the pressure head mates with the fastening bolt. The fastening nut is screwed into the fastening bolt, pressing the pressure head firmly against the bottom surface of the test plate. When the worker loosens the fastening nut, the pressure head can move along the slot and adjust its position to suit the location of the test terminal.
[0009] The horizontal adjustment plate is provided with a longitudinal adjustment screw seat, and the longitudinal adjustment screw is pivotally connected to the longitudinal adjustment screw seat.
[0010] The base plate is provided with a transverse adjustment screw seat, and the transverse adjustment screw is pivotally connected to the transverse adjustment screw seat.
[0011] The lifting drive module includes a support base fixedly mounted on a bracket, a slider movably fitted on the support base, and a horizontal screw threaded to the slider. The horizontal screw thread is pivotally connected to a horizontal screw seat, which is fixed to the support base. A wedge block is provided on the slider, and the horizontal displacement of the wedge block drives the terminal block to lift.
[0012] The wedge block and slider are in movable engagement. The wedge block can move horizontally and longitudinally relative to the slider, while the horizontal screw drives the slider to move horizontally and laterally. A slot is formed on the inclined surface of the wedge block, and a tapered component is fixed to the bottom of the terminal block, fitting into the slot. The tapered component can partially penetrate the slot, and the wedge block can adaptively move horizontally and longitudinally, allowing the sidewall of the tapered component to stably contact the two sidewalls of the slot, thus enabling the terminal block to move horizontally and vertically.
[0013] The wedge block and the slider are movably engaged by a horizontal longitudinal guide rail, which is fixed on the slider.
[0014] The terminal block and the bracket are movably connected via a vertical guide rail, which is fixed to the bracket. The vertical guide rail and terminal block can only move linearly up and down, and cannot move forward, backward, left, or right.
[0015] The distance between the two detection terminals of this invention is adjustable, as are their front-to-back, left-to-right, and height adjustments, enabling the lithium battery OCV testing device to adapt to different types of lithium batteries. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings:
[0017] Figure 1 This is a schematic diagram of a lithium battery OCV testing device;
[0018] Figure 2 for Figure 1 CC section view;
[0019] Figure 3 for Figure 1 The left view;
[0020] Figure 4 for Figure 1 Enlarged view of a portion of point A in the middle;
[0021] Figure 5 for Figure 2 Enlarged view of section B in the middle.
[0022] Explanation of symbols in the diagram:
[0023] 10. Bracket; 11. Vertical cylinder; 12. Test plate; 120. Pressure head;
[0024] 20. Detection terminal; 21. Terminal base; 210. Terminal base positioning hole; 211. Strip hole; 22. Terminal block; 220. Terminal block positioning hole; 23. Vertical guide rail;
[0025] 30. Horizontal longitudinal adjustment plate; 31. Longitudinal adjustment screw; 32. Longitudinal adjustment screw seat;
[0026] 40. Horizontal adjustment plate; 41. Horizontal adjustment screw; 42. Horizontal adjustment screw seat;
[0027] 50. Base plate;
[0028] 60. Lifting drive module; 61. Support base; 62. Slider; 63. Horizontal screw; 64. Horizontal screw seat; 65. Wedge block; 66. Strip groove; 67. Conical part; 68. Horizontal longitudinal guide rail. Detailed Implementation
[0029] Combination Figure 1 , Figure 2 A lithium battery OCV testing device includes a bracket 10, a vertical cylinder 11 mounted on the bracket, a test pressure plate 12 connected to the vertical cylinder, and a detection terminal 20 mounted on the bracket and located below the test pressure plate. The detection terminal is mounted on a terminal module. The bracket is mounted on a horizontal longitudinal adjustment plate 30, which is fitted onto a horizontal transverse adjustment plate 40. The horizontal transverse adjustment plate is fitted onto a base plate 50. A longitudinal adjustment screw 31 is provided between the horizontal longitudinal adjustment plate and the horizontal transverse adjustment plate, and a transverse adjustment screw 41 is provided between the horizontal transverse adjustment plate and the base plate.
[0030] The terminal module includes a terminal base 21 and a terminal block 22. The detection terminal is set on the terminal block, and the terminal block is set on the terminal base. The terminal base is movably fitted on the bracket. The bracket is provided with a lifting drive module 60, which can lift the terminal base. The terminal base is provided with a row of terminal base positioning holes 210, and the terminal block is provided with terminal block positioning holes 220. The positioning pin is inserted into the terminal block positioning holes and the terminal base positioning holes that are aligned vertically.
[0031] The horizontal adjustment plate 40 is provided with a longitudinal adjustment screw seat 32, and the longitudinal adjustment screw 31 is pivotally connected to the longitudinal adjustment screw seat.
[0032] A horizontal adjusting screw seat 42 is provided on the base plate 50, and the horizontal adjusting screw 41 is pivotally connected to the horizontal adjusting screw seat.
[0033] Combination Figure 1 , Figure 4 , Figure 5 The lifting drive module 60 includes a support base 61 fixedly mounted on the bracket 10, a slider 62 movably fitted on the support base, and a horizontal screw 63 screwed to the slider. The horizontal screw is pivotally connected to a horizontal screw seat 64, which is fixed on the support base. A wedge block 65 is provided on the slider 62, and the horizontal displacement of the wedge block drives the terminal block 21 to rise and fall.
[0034] The wedge block 65 is movablely engaged with the slider 62. The wedge block can move horizontally and longitudinally relative to the slider. The horizontal screw 63 can drive the slider to move horizontally and laterally. A strip groove 66 is opened on the inclined surface of the wedge block 65. A tapered part 67 is fixed at the bottom of the terminal block 21 and fits in the strip groove.
[0035] The wedge block 65 and the slider 62 are movably engaged by the horizontal longitudinal guide rail 68, which is fixed on the slider.
[0036] Terminal block 21 and bracket 10 are movably connected via vertical guide rail 23, which is fixed on bracket 10.
[0037] During testing, the lithium battery is positioned to the side of the testing device, with its tabs placed flat between the testing terminal 20 and the testing plate 12. The testing plate descends, bringing the lithium battery tabs into contact with the testing terminal 20 to obtain the open-circuit voltage of the lithium battery, thus achieving lithium battery OCV testing.
[0038] The worker rotates the longitudinal adjusting screw 31, driving the horizontal longitudinal adjusting plate 30 to move longitudinally relative to the horizontal transverse adjusting plate 40, thereby adjusting the front-to-back position of the bracket 10 and its detection terminals 20 and test pressure plate 12. The worker rotates the transverse adjusting screw 41, driving the horizontal transverse adjusting plate 40 to move laterally relative to the base plate 50, thereby adjusting the left-to-right position of the bracket and its detection terminals 20 and test pressure plate 12. The lifting drive module 60 drives the terminal holder 21 to rise and fall, thereby adjusting the height of the detection terminals 20. The worker pulls out the positioning pin, which allows adjustment of the distance between the two detection terminals 20 on the terminal holder 21. Once the distance is appropriate, the positioning pin is used to fix the position of the detection terminals.
[0039] The test plate 12 has a groove on its bottom surface. The head of the fastening bolt fits into the groove, and the center hole of the pressure head 120 fits into the fastening bolt. The fastening nut is screwed into the fastening bolt, pressing the pressure head firmly onto the bottom surface of the test plate 12. When the worker loosens the fastening nut, the pressure head can move along the groove and adjust its position to suit the position of the test terminal 20.
[0040] A strip-shaped hole 211 is provided on the terminal block 21, and a fastening bolt is fitted in the strip-shaped hole. After the height of the terminal block 21 is adjusted, the fastening bolt fixes the terminal block to the bracket 10.
[0041] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A lithium battery OCV testing device, comprising a support (10), a vertical cylinder (11) arranged on the support, a testing pressure plate (12) connected with the vertical cylinder, a detection terminal (20) arranged on the support and below the testing pressure plate, the detection terminal being mounted on a terminal module, characterized in that: The bracket is installed on the horizontal longitudinal adjustment plate (30), the horizontal longitudinal adjustment plate is fitted on the horizontal transverse adjustment plate (40), the horizontal transverse adjustment plate is fitted on the base plate (50), a longitudinal adjustment screw (31) is provided between the horizontal longitudinal adjustment plate and the horizontal transverse adjustment plate, and a transverse adjustment screw (41) is provided between the horizontal transverse adjustment plate and the base plate. The terminal module includes a terminal base (21) and a terminal block (22). The detection terminal is set on the terminal block, and the terminal block is set on the terminal base. The terminal base is movably fitted on the bracket. The bracket is provided with a lifting drive module (60), which can lift the terminal base. The terminal base is provided with a row of terminal base positioning holes (210), and the terminal block is provided with terminal block positioning holes (220). The positioning pin is inserted into the terminal block positioning hole and the terminal base positioning hole aligned vertically.
2. The lithium battery OCV testing apparatus of claim 1, wherein: A longitudinal adjusting screw seat (32) is provided on the horizontal adjusting plate (40), and the longitudinal adjusting screw (31) is pivotally connected to the longitudinal adjusting screw seat.
3. The lithium battery OCV testing apparatus of claim 1, wherein: A transverse adjustment screw seat (42) is provided on the base plate (50), and the transverse adjustment screw (41) is pivotally connected to the transverse adjustment screw seat.
4. The lithium battery OCV test apparatus of claim 1, wherein: The lifting drive module (60) includes a support base (61) fixedly mounted on a bracket (10), a slider (62) movably fitted on the support base, and a horizontal screw (63) screwed to the slider. The horizontal screw is pivotally connected to a horizontal screw seat (64), which is fixed on the support base. A wedge block (65) is provided on the slider (62), and the horizontal displacement of the wedge block drives the terminal block (21) to lift.
5. The lithium battery OCV testing apparatus of claim 4, wherein: The wedge block (65) and the slider (62) are movablely engaged. The wedge block can move horizontally and longitudinally relative to the slider. The horizontal screw (63) can drive the slider to move horizontally and laterally. A strip groove (66) is opened on the inclined surface of the wedge block (65). A tapered part (67) is fixed at the bottom of the terminal block (21). The tapered part is engaged in the strip groove.
6. The lithium battery OCV testing apparatus of claim 4, wherein: The wedge block (65) and the slider (62) are movably engaged by the horizontal longitudinal guide rail (68), which is fixed on the slider.
7. The lithium battery OCV testing apparatus of claim 4, wherein: The terminal block (21) and the bracket (10) are movably connected by a vertical guide rail (23), which is fixed on the bracket (10).