Cylindrical battery OCV detection device

Abstract

The utility model provides a kind of cylindrical battery OCV detection device, belong to battery detection field, including the cylindrical battery of bottom base upper flat lying placement;Clamp jaw is arranged in one end of cylindrical battery;Movable part is arranged in the other end of cylindrical battery;Clamp jaw is around cylindrical battery axial arrangement, clamp jaw moves along the radial direction of cylindrical battery simultaneously, clamp jaw clamps or releases the end peripheral wall of cylindrical battery, each clamp jaw is provided with detection head on the contact surface with the peripheral wall of cylindrical battery;Movable part moves along the axial direction of cylindrical battery, movable part abuts or separates the end of cylindrical battery, movable part is also provided with detection head on the contact surface with the end of cylindrical battery.The utility model can adapt to cylindrical battery of different outer diameter size and height size by clamp jaw of adjustable opening and closing and movable part of forward and backward sliding, can switch different models of cylindrical battery for testing at any time and carry out corresponding adjustment to adapt, improve the operation applicability of detection device, reduce detection difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a cylindrical battery OCV testing device. Background Technology

[0002] OCV testing is used to test the open-circuit voltage, AC internal resistance, and casing voltage of a single cell. It mainly measures the battery characteristics by pressing probes connected to a voltage tester and an internal resistance tester onto the positive and negative tabs of the battery.

[0003] Currently, there are many models of cylindrical batteries, ranging from 18 to 65 mm in diameter and various heights, from 65 to 200 mm. Existing tooling options are limited, and compatibility issues may arise with batteries of different diameters and heights, making it impossible to test OCV or significantly reducing testing efficiency during use, thus failing to meet continuous usage requirements. Therefore, it is necessary to develop new tooling for OCV testing.

[0004] During the OCV testing of finished products, the lack of matching OCV testing fixtures may lead to the use of handheld devices or the purchase of new fixtures, resulting in a significant reduction in the accuracy and efficiency of test data, representing a substantial loss in the R&D process. Purchasing new fixtures, on the other hand, involves a long procurement cycle and increased costs, making it unprofitable. However, existing cylindrical battery testing fixtures have poor compatibility, making switching between different cylindrical battery models cumbersome, requiring repeated disassembly and reassembly of the fixtures. Furthermore, their use is limited, with many fixtures being designed for a single model, necessitating frequent fixture changes during testing, which is inconvenient, and purchasing multiple fixtures is costly. Utility Model Content In view of this, this utility model proposes a cylindrical battery OCV testing device to solve the problem that there are many types of cylindrical batteries and existing testing fixtures cannot meet the needs of switching between testing the OCV of multiple cylindrical battery models.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a cylindrical battery OCV detection device, including a base on which a cylindrical battery is placed flat; several grippers are disposed at one end of the cylindrical battery; a movable part is disposed at the other end of the cylindrical battery; wherein, the several grippers are arranged axially around the cylindrical battery, and the several grippers move simultaneously along the radial direction of the cylindrical battery, the several grippers clamping or releasing the outer peripheral wall of the end of the cylindrical battery, and a detection head is provided on the contact surface between each gripper and the outer peripheral wall of the cylindrical battery; the movable part moves axially along the cylindrical battery, and the movable part abuts against or disengages from the end of the cylindrical battery, and a detection head is also provided on the contact surface between the movable part and the end of the cylindrical battery.

[0006] Based on the above technical solution, preferably, it also includes a bracket, which is set at one end of the base; a shaft, which passes through the bracket along the axial direction of the cylindrical battery; a slider, which is sleeved on the shaft and moves along the shaft; and several wedges, which are connected to several grippers in a corresponding manner; wherein, several inclined grooves are opened around the shaft on the slider; the several wedges are set in the several inclined grooves in a corresponding manner, and when the slider moves along the shaft, the several wedges drive the grippers to move simultaneously along the radial direction of the shaft.

[0007] More preferably, the shaft is a screw, which rotates axially relative to the support, and the shaft is screwed to the slider. When the shaft rotates, the slider moves along the shaft.

[0008] More preferably, the inclined groove is symmetrically provided with sliding grooves on both sides along its extension direction; the wedge is symmetrically provided with flanges on both sides along the extension direction of the inclined groove, and the two flanges are respectively provided in the two sliding grooves and move along the sliding grooves.

[0009] More preferably, it also includes a guide rod, one end of which is disposed on the end of the slider facing the bracket and the other end extends outward through the bracket along the shaft axis.

[0010] Even more preferably, the sloping groove is inclined along the direction of the bracket toward the base.

[0011] More preferably, it also includes several limiting plates arranged around the outer periphery of the slider; wherein, the several limiting plates are respectively set on the side of several wedges away from the slider. When the slider moves away from the base, causing the wedges to move along the inclined groove and approach the end of the inclined groove facing the base, the wedges abut against the limiting plates.

[0012] Based on the above technical solutions, preferably, it also includes a sliding seat, which is disposed at one end of the cylindrical battery and moves along the axial direction of the cylindrical battery; and a telescopic mechanism, which is disposed on the sliding seat and connected to the movable part.

[0013] More preferably, it also includes a baffle connected to the output end of the telescopic mechanism; and an elastic element with both ends extending along the axial direction of the cylindrical battery; wherein the movable part is disposed on the baffle, the elastic element is disposed between the movable part and the baffle, and both ends of the elastic element are respectively connected to the movable part and the baffle.

[0014] More preferably, it also includes a slide bar, one end of which is disposed on the end face of the movable part facing the baffle, and the other end extends outward through the baffle along the axial direction of the cylindrical battery.

[0015] The cylindrical battery OCV detection device of this utility model has the following advantages over the prior art: (1) This utility model can adapt to cylindrical batteries with different outer diameters and heights by means of adjustable clamps and movable parts that can slide back and forth. It can switch between different models of cylindrical batteries for testing and make corresponding adjustments to adapt to them, which greatly improves the operability of the testing device and reduces the testing difficulty and cost.

[0016] (2) This utility model achieves rapid opening and closing adjustment of the gripper by using a slider with an inclined groove on the outer periphery in conjunction with multiple wedges, which is convenient to adapt to the outer diameter of different cylindrical batteries.

[0017] (3) In this utility model, an elastic element is provided between the movable part that abuts the end of the battery and the output end of the telescopic mechanism. This not only buffers the large pressure applied to the battery when the movable part abuts the end of the battery, thus avoiding damage to the battery, but also enables the movable part to be pressed tightly on the end of the battery for effective testing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the detection device of this utility model; Figure 2 This is a partial perspective view of the detection device of this utility model; Figure 3 This is a partial side sectional view of the detection device of this utility model; Figure 4 This is a partial perspective view of the detection device of this utility model.

[0020] In the diagram: 1. Base; 2. Gripper; 21. Detection head; 3. Movable part; 4. Bracket; 5. Shaft; 6. Slider; 601. Inclined groove; 602. Slide groove; 7. Wedge; 71. Flange; 8. Guide rod; 9. Limiting plate; 10. Sliding seat; 11. Telescopic mechanism; 12. Baffle; 13. Elastic element; 14. Slide rod. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown, combined with Figure 2 This utility model discloses a cylindrical battery OCV testing device, comprising a base 1 on which a cylindrical battery is placed lying flat; a plurality of grippers 2 disposed at one end of the cylindrical battery; and a movable part 3 disposed at the other end of the cylindrical battery. The grippers 2 are arranged axially around the cylindrical battery and move simultaneously radially along the cylindrical battery. The grippers 2 clamp or release the outer peripheral wall of the cylindrical battery end. A detection head 21 is disposed on the contact surface between each gripper 2 and the outer peripheral wall of the cylindrical battery. The movable part 3 moves axially along the cylindrical battery end and abuts against or disengages from the end of the cylindrical battery. A detection head 21 is also disposed on the contact surface between the movable part 3 and the end of the cylindrical battery end. When using the above technical solution, a semi-cylindrical groove is provided on the base to securely place the cylindrical battery in the groove of the base 1. By adjusting several grippers 2 to move simultaneously toward the center, the distance between the grippers 2 can be reduced, thus enabling the clamping of cylindrical batteries with smaller outer diameters. Conversely, by adjusting several grippers 2 to move simultaneously away from the center, the distance between the grippers 2 can be increased, thus enabling the clamping of cylindrical batteries with larger outer diameters. The movable part 3 moves back and forth relative to the base 1 to adjust the distance between the movable part 3 and the grippers 2, thereby adapting to the axial height of the cylindrical battery. When the movable part 3 abuts against the end of the battery (generally the positive terminal), the end face of the movable part 3 will contact the positive terminal post of the battery, while several grippers 2 simultaneously clamp the outer peripheral wall of the negative terminal end of the battery. Since the battery casing itself is conductive, after the grippers 2 and the movable part 3 clamp the battery, the detection head 21 on both of them, which is in contact with the battery, will be energized, thereby completing the OCV detection of the battery.

[0023] exist Figure 2 In one optional embodiment, the system further includes a bracket 4, disposed at one end of the base 1; a shaft 5, passing through the bracket 4 along the axial direction of the cylindrical battery; a slider 6, sleeved on the shaft 5 and moving along the shaft 5; and several wedges 7, each corresponding to a number of grippers 2. The slider 6 has several inclined grooves 601 around the shaft 5; the wedges 7 are correspondingly disposed within the inclined grooves 601. When the slider 6 moves along the shaft 5, the wedges 7 drive the grippers 2 to move radially along the shaft 5 simultaneously. Using the above technical solution, because the inclined grooves 601 on the slider 6 extend at an angle, when the slider 6 moves towards the base 1, it gradually pushes apart the wedges 7 surrounding the slider 6, increasing the distance between the wedges 7, which in turn increases the distance between the grippers 2, causing the grippers to open. When the slider 6 moves away from the base 1, it gradually gives way to the wedges 7 surrounding the slider 6, causing the wedges 7 to move and reset, reducing the distance between the grippers 2, causing the grippers to close.

[0024] exist Figure 2In one optional embodiment shown, the shaft 5 is a screw, which rotates axially relative to the bracket 4. The shaft 5 is screwed to the slider 6. When the shaft 5 rotates, the slider 6 moves along the shaft 5. With the above technical solution, a bearing is fitted between the shaft 5 and the bracket 4, ensuring that the relative position of the shaft 5 and the bracket 4 does not shift when the shaft 5 rotates within the bracket 4. Since the shaft 5 is a screw, and the wedge 7 restricts the slider 6 from rotating synchronously with the shaft 5, the slider 6 moves back and forth along the shaft 5 when the shaft 5 rotates.

[0025] exist Figure 2 In one optional embodiment shown, the inclined groove 601 is symmetrically provided with sliding grooves 602 on both sides along its extending direction; the wedge block 7 is symmetrically provided with flanges 71 on both sides along the extending direction of the inclined groove 601, and the two flanges 71 are respectively disposed in the two sliding grooves 602 and move along the sliding grooves 602. By making the flanges 71 stuck in the sliding grooves 602, the wedge block 7 will not disengage from the inclined groove 601, and at the same time, the wedge block 7 can also move along the inclined groove 601.

[0026] exist Figure 3 In one alternative embodiment shown, a guide rod 8 is further included, one end of which is disposed on the end of the slider 6 facing the bracket 4, and the other end extends outwardly through the bracket 4 along the shaft 5. The guide rod 8 not only guides the slider 5 to move along the shaft 5, but also prevents the slider 6 from rotating synchronously with the shaft 5.

[0027] exist Figure 3 In one alternative embodiment shown, the inclined groove 601 is inclined along the direction of the bracket 4 toward the base 1. Therefore, the part of the slider 6 located between each inclined groove 601 has an axial cross-sectional shape of an isosceles trapezoid, and the short side of the isosceles trapezoid faces the base 1. In this case, the slider 6 will open the gripper 2 when it moves toward the base 1, and the gripper 2 will close when it moves away from the base 1.

[0028] exist Figure 3 In one optional embodiment, a plurality of limiting plates 9 are further included, arranged around the outer periphery of the slider 6 around the shaft 5. The limiting plates 9 are correspondingly positioned on the side of the wedges 7 away from the slider 6. When the slider 6 moves away from the base 1, causing the wedges 7 to move along the inclined groove 601 and approach the end of the inclined groove 601 facing the base 1, the wedges 7 abut against the limiting plates 9. The limiting plates 9 restrict the maximum opening range of the grippers 2, and also prevent the wedges 7 from moving too far relative to the slider 6 and disengaging from the inclined groove 601.

[0029] exist Figure 4In one optional embodiment, a sliding seat 10 is further included, which slides linearly via a slide rail mechanism, is disposed at one end of the cylindrical battery, and moves along the axial direction of the cylindrical battery; the sliding seat 10 can be mounted on a lead screw sliding mechanism to precisely control its linear movement distance. The telescopic mechanism 11 can be a pneumatic telescopic rod or an electric telescopic push rod, which is mounted on the sliding seat 10 and connected to the movable part 3. When using the above technical solution, the movable part 3 is first moved by the sliding seat 10 to abut against the end of the battery, and then the pneumatic telescopic mechanism 11 presses the movable part 3 tightly.

[0030] exist Figure 4 In one optional embodiment, a baffle 12 is further included, connected to the output end of the telescopic mechanism 11; the elastic element 13 may be a spring, with both ends extending axially along the cylindrical battery; wherein, the movable part 3 is disposed on the baffle 12, and the elastic element 13 is disposed between the movable part 3 and the baffle 12, with both ends of the elastic element 13 connected to the movable part 3 and the baffle 12 respectively. The elastic element 13 serves to buffer the holding pressure of the telescopic mechanism 11, preventing damage to the battery.

[0031] exist Figure 4 In one optional embodiment shown, a slide bar 14 is further included, one end of which is disposed on the end face of the movable part 3 facing the baffle 12, and the other end extends outward through the baffle 12 along the axial direction of the cylindrical battery. The function of the slide bar 14 is to guide the elastic member 13 to undergo linear compression and to guide the movement direction of the movable part 3.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylindrical battery OCV detection device, characterized in that, include: The base (1) on which a cylindrical battery is placed lying flat; Several grippers (2) are disposed at one end of the cylindrical battery; The active part (3) is located at the other end of the cylindrical battery; Among them, several grippers (2) are arranged around the cylindrical battery axially, several grippers (2) move simultaneously along the radial direction of the cylindrical battery, several grippers (2) clamp or release the end outer peripheral wall of the cylindrical battery, and a detection head (21) is provided on the contact surface between each gripper (2) and the outer peripheral wall of the cylindrical battery. The movable part (3) moves along the axial direction of the cylindrical battery. The movable part (3) abuts against or disengages from the end of the cylindrical battery. A detection head (21) is also provided on the contact surface between the movable part (3) and the end of the cylindrical battery.

2. The cylindrical battery OCV detection device according to claim 1, characterized in that, Also includes: A bracket (4) is disposed at one end of the base (1); The shaft (5) passes through the bracket (4) along the axial direction of the cylindrical battery; The slider (6) is sleeved on the shaft (5) and moves along the shaft (5); Several wedges (7) are connected one-to-one with several grippers (2); The slider (6) has several inclined grooves (601) around the shaft (5). Several wedges (7) are arranged one-to-one in several inclined grooves (601). When the slider (6) moves along the shaft (5), several wedges (7) drive the gripper (2) to move radially along the shaft (5) at the same time.

3. The cylindrical battery OCV detection device according to claim 2, characterized in that: The shaft (5) is a screw, which rotates axially relative to the bracket (4). The shaft (5) is screwed to the slider (6). When the shaft (5) rotates, the slider (6) moves along the shaft (5).

4. The cylindrical battery OCV detection device according to claim 2, characterized in that: The inclined groove (601) is symmetrically provided with sliding grooves (602) on both sides along its extension direction; the wedge (7) is symmetrically provided with flanges (71) on both sides along the extension direction of the inclined groove (601), and the two flanges (71) are respectively provided in the two sliding grooves (602) and move along the sliding grooves (602).

5. The cylindrical battery OCV detection device according to claim 2, characterized in that, Also includes: The guide rod (8) has one end located on the end of the slider (6) facing the bracket (4) and the other end extends outward along the shaft (5) through the bracket (4).

6. The cylindrical battery OCV detection device according to claim 2, characterized in that: The inclined groove (601) is inclined along the bracket (4) toward the base (1).

7. The cylindrical battery OCV detection device according to claim 2, characterized in that, Also includes: Several limiting plates (9) are arranged around the outer periphery of the slider (6) around the shaft (5); Among them, several limiting plates (9) are arranged one-to-one on the side of several wedges (7) away from the slider (6). When the slider (6) moves away from the base (1), the wedges (7) move along the inclined groove (601) and approach the end of the inclined groove (601) facing the base (1), the wedges (7) abut against the limiting plates (9).

8. The cylindrical battery OCV detection device according to claim 1, characterized in that, Also includes: A sliding seat (10) is disposed at one end of the cylindrical battery and moves along the axial direction of the cylindrical battery. The telescopic mechanism (11) is mounted on the sliding seat (10) and connected to the movable part (3).

9. The cylindrical battery OCV detection device according to claim 8, characterized in that, Also includes: A baffle (12) is connected to the output end of the telescopic mechanism (11); The elastic element (13) extends at both ends along the axial direction of the cylindrical battery; The movable part (3) is disposed on the baffle (12), and the elastic element (13) is disposed between the movable part (3) and the baffle (12). The two ends of the elastic element (13) are respectively connected to the movable part (3) and the baffle (12).

10. The cylindrical battery OCV detection device according to claim 9, characterized in that, Also includes: The slide bar (14) has one end located on the end face of the movable part (3) facing the baffle (12) and the other end extends outward through the baffle (12) along the axial direction of the cylindrical battery.

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