Cylindrical battery test clamping mechanism

Abstract

The utility model provides a clamping mechanism for testing a cylindrical battery, which comprises a bottom plate and two clamping plates which relatively slide on the bottom plate and are used for clamping the battery, and is characterized in that a layer plate is arranged on the bottom plate, a sealed air cavity is arranged in each clamping plate, a movable cavity communicated with the air cavity is arranged on each clamping plate, and the movable cavity is communicated with the air cavity. A piston for sealing the movable cavity is slidably installed in the movable cavity and makes contact with the battery, and an air pressure sensor is installed on the clamping plate and located at one end of the air cavity. The problem of accidental scald of people caused by mixing can be avoided, and the safety is improved; gas in the cavity is compressed through expansion of the battery, changes of expansion and thermal runaway of the battery are detected through the pressure intensity of the gas, direct observation when people approach can be avoided, danger is reduced, meanwhile, the pressure sensor is electrically connected with an alarm system, the alarm system can be triggered through changes of the battery, and the safety of the battery is improved. Errors caused by personnel observation are avoided, and the accuracy and the battery detection efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molten iron pouring, in particular to a cylindrical battery testing clamping mechanism. Background Art

[0002] In the field of lithium batteries, lithium batteries have shapes such as blade, block, cylindrical and special shapes. In cylindrical batteries, the batteries will be encapsulated in a whole battery module for use. Therefore, after the battery is manufactured, it is necessary to conduct daily simulation tests on the battery to avoid the potential risks of micro-short circuits and mechanical damage causing thermal polymerization. Therefore, before the lithium battery is formally assembled into a module for use, a large number of vibration tests and experiments are required to ensure the reliability of the battery.

[0003] Chinese patent publication number CN319266351U discloses a cylindrical battery vibration test fixture, which can effectively clamp the cylindrical battery, ensure the stability of the cylindrical battery during the vibration test, and is compatible with cylindrical batteries of different diameters and lengths.

[0004] However, in actual use, the cylindrical battery is placed in a clamping mechanism, and the position of the battery is relatively fixed. During the test, if the battery has slight bulging or inflation, the application lacks monitoring of changes in the cylindrical battery, which will make it difficult for people to detect the bulging and inflation of the cylindrical battery in time, thereby increasing the risk of thermal runaway, fire, or even explosion of the battery, causing errors in the testing of the cylindrical battery, and unqualified batteries may be used in the battery pack, causing risks. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cylindrical battery test clamping mechanism to solve the problem that the above battery clamping mechanism does not have the function of real-time battery monitoring.

[0006] Based on the technical problems existing in the background technology, the utility model proposes a cylindrical battery testing clamping mechanism, including a base plate and two clamping plates that slide relative to each other on the base plate and clamp the battery, a layer plate is installed on the base plate, a sealed air cavity is provided in the clamping plate, an active cavity connected to the air cavity is provided on the clamping plate, a piston that seals the active cavity is slidably installed in the active cavity, and the piston is in contact with the battery, and an air pressure sensor is installed on the clamping plate at one end of the air cavity.

[0007] Preferably, an adjustment plate is slidably installed on one end of the clamping plate away from the air pressure sensor, and the adjustment plate is located in the air cavity and fits against the inner wall of the air cavity. A first screw is rotatably installed on the clamping plate, and the first screw passes through the air cavity from the outside of the clamping plate and contacts the adjustment plate.

[0008] Preferably, a partition is provided between the active cavity and the air cavity, and a hole is provided on the partition for communicating the active cavity with the air cavity.

[0009] Preferably, an elastic member is installed in the movable chamber, and two ends of the elastic member respectively abut against the piston and the partition.

[0010] Preferably, the bottom plate is provided with a slot, the slot is provided with two mutually parallel guide rails, two driving plates are oppositely slidably mounted on the guide rails, and the two clamping plates are mounted on the driving plates.

[0011] Preferably, a gear is rotatably installed in the slot between the two driving plates, and both driving plates are connected to racks meshing with the gears. The rotation of the gear can simultaneously drive the two racks to move in opposite directions.

[0012] Preferably, a pushing mechanism is installed on one side of the driving plates, and the pushing direction of the pushing mechanism is parallel to the moving direction of the rack.

[0013] Preferably, the clamping plate includes an extension plate and a clamping plate, two extension plates are slidably connected to form a group, two groups of extension plates are installed on two driving plates, each extension plate is installed with a clamping plate, and a battery clamping space is formed between the four clamping plates.

[0014] Preferably, one of the extension plates in each group of the extension plates is threadedly connected to a second screw rod, and the second screw rod passes through the extension plate and contacts another extension plate in the same group.

[0015] Compared with the existing technology, the cylindrical battery test clamping mechanism proposed in this utility model adopts the above technical solution and achieves the following technical effects:

[0016] The utility model compresses the gas in the cavity through the expansion of the battery, and detects the expansion and thermal runaway changes of the battery through the pressure of the gas, which can avoid direct observation by people close to it and reduce the danger. At the same time, the pressure sensor in the utility model is electrically connected to the alarm system, and the alarm system can be triggered by the changes in the battery, avoiding errors caused by human observation and improving the accuracy and efficiency of battery detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the battery clamping device of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the bottom plate of the utility model;

[0020] Figure 4This is a schematic diagram of the structure of the clamping plate of the utility model;

[0021] Figure 5 This is a schematic diagram of the connection between the active cavity and the air cavity of the utility model.

[0022] In the figure: 1. Base plate; 2. Clamping plate; 3. Layer plate; 31. Air cavity; 32. Active cavity; 5. Piston; 4. Air pressure sensor; 61. Adjustment plate; 62. First screw; 33. Partition; 331. Hole; 34. Elastic member; 11. Slot; 12. Guide rail; 13. Drive plate; 14. Gear; 131. Rack; 7. Pushing mechanism; 21. Extension plate; 22. Clamping plate; 23. Second screw. DETAILED DESCRIPTION

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] Example

[0026] Please refer to Figure 1-Figure 5 The utility model proposes a cylindrical battery test clamping mechanism, including a base plate 1 and two clamping plates 2 that slide relatively on the base plate 1 and clamp the battery, a layer plate 3 is installed on the base plate 1, a sealed air cavity 31 is provided in the clamping plate 2, and an active cavity 32 connected to the air cavity 31 is provided on the clamping plate 2. A piston 5 that seals the active cavity 32 is slidably installed in the active cavity 32, and the piston 5 is in contact with the battery, and an air pressure sensor 4 is installed on the clamping plate 2 at one end of the air cavity 31.

[0027] In the above, there are two clamping plates 2, and the clamping plates 2 are opposite to each other. When in use, the two clamping plates 2 can move closer to or farther away from each other to clamp and release the battery. The piston 5 on the layer plate 3 is located between the two clamping plates 2. When in use, the two clamping plates 2 first clamp the cylindrical battery. The piston 5 on the layer plate 3 will be squeezed by the battery, and the gas in the active cavity 32 will be pressed close to the air cavity 31. Since the sum of the volumes of the air cavity 31 and the active cavity 32 decreases, the air pressure in the air cavity 31 will increase, and its pressure can trigger the air pressure sensor 4 to work. In the utility model, the air pressure sensor 4 is electrically connected to an alarm device, which alarms when the sensor is under pressure.

[0028] In the specific implementation manner, reference Figure 2 An adjustment plate 61 is slidably installed on the end of the clamping plate 2 away from the air pressure sensor 4. The adjustment plate 61 is located in the air cavity 31 and fits against the inner wall of the air cavity 31. A first screw 62 is rotatably installed on the clamping plate 2. The first screw 62 passes through the air cavity 31 from the outside of the clamping plate 2 and contacts the adjustment plate 61.

[0029] In the above, after the battery is clamped, the air pressure in the air cavity 31 will increase. In order to avoid false alarms, it is necessary to adjust the air pressure in the air cavity 31 through the first screw 62 so that the air pressure in the air cavity 31 is in a non-alarm state. The rotation of the first screw 62 can squeeze the first screw 62 to rotate, and drive the adjustment plate 61 to squeeze the air cavity 31 to increase the pressure, and make the piston 5 protrude outward to resist the battery. When the air pressure in the air cavity 31 is large, it can squeeze the adjustment plate 61 to move in the opposite direction. At this time, loosening the first screw 62 can reduce the air pressure in the air cavity 31 to balance.

[0030] In the specific implementation manner, reference Figure 2 、 Figure 5 There is a partition 33 between the active chamber 32 and the air chamber 31, and a hole 331 is opened on the partition 33 for communicating the active chamber 32 with the air chamber 31; an elastic member 34 is installed in the active chamber 32, and the two ends of the elastic member 34 respectively abut the piston 5 and the partition 33.

[0031] In the above, the active chamber 32 and the air chamber 31 can be isolated by a partition 33, and ventilation is achieved through the hole 331. When the piston 5 and the elastic member 34 are installed in the active chamber 32, a contact point can be provided for the elastic member 34, and at the same time, the piston 5 can be prevented from excessively moving toward the air chamber 31. The opening of the active chamber 32 facing the battery has a cap, and the piston 5 passes through the cap to prevent the piston 5 from popping out under the action of the elastic member 34. The elastic member 34 is always in a compressed state.

[0032] In the specific implementation manner, reference Figure 3 、 Figure 4The bottom plate 1 is provided with a slot 11, and the slot 11 is provided with two mutually parallel guide rails 12. Two driving plates 13 are installed on the guide rails 12 for opposite sliding. The two clamping plates 2 are installed on the driving plates 13; a gear 14 is rotatably installed between the two driving plates 13 in the slot 11, and the two driving plates 13 are connected to racks 131 that mesh with the gear 14. The rotation of the gear 14 can simultaneously drive the two racks 131 to move in opposite directions.

[0033] In the above, the slot 11 can provide installation space for the components. When the driving plate 13 on one side is subjected to a push or pull force, the movement of the driving plate 13 can drive a rack 131 to move, and at the same time the gear 14 will rotate, then the other rack 131 engaged with the gear 14 will also move, and the two driving plates 13 can approach or move away at the same time, which can increase the clamping speed of the battery and improve a certain efficiency.

[0034] In the specific implementation manner, reference Figure 3 A pushing mechanism 7 is installed on one side of the driving plates 13 , and the pushing direction of the pushing mechanism 7 is parallel to the moving direction of the rack 131 .

[0035] In the above description, the pushing mechanism 7 can drive one driving plate 13 to move in translation, so that the two driving plates 13 move closer to or farther away from each other. The pushing mechanism 7 is a cylinder in the prior art.

[0036] In the specific implementation manner, reference Figure 2 、 Figure 4 The clamping plate 2 includes an extension plate 21 and a clamping plate 22. The two extension plates 21 are slidably connected to form a group. The two groups of extension plates 21 are installed on the two driving plates 13. Each extension plate 21 is installed with a clamping plate 22. A battery clamping space is formed between the four clamping plates 22.

[0037] In the above, the clamping plates 22 have inclined surfaces, and the angle between the inclined surfaces of adjacent clamping plates 22 is 90 degrees. When the four clamping plates 22 are close to each other, they can stably clamp a cylindrical battery.

[0038] In the specific implementation manner, reference Figure 4 One of the extension plates 21 in each group of extension plates 21 is threadedly connected to a second screw rod 23 , and the second screw rod 23 passes through the extension plate 21 and contacts another extension plate 21 in the same group.

[0039] In the above, the two extension plates 21 are vertically slidably connected to accommodate the longitudinal dimensions of the battery and to clamp and fix the battery. The spacing between the two extension plates 21 is adjusted by rotating the second screw 23 .

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylindrical battery test clamping mechanism, comprising a base plate (1) and two clamping plates (2) that slide relative to each other on the base plate (1) and clamp the battery, characterized in that: A layer plate (3) is mounted on the bottom plate (1), a sealed air cavity (31) is provided in the clamping plate (2), a movable cavity (32) in communication with the air cavity (31) is provided on the clamping plate (2), a piston (5) for sealing the movable cavity (32) is slidably mounted on the movable cavity (32), and the piston (5) is in contact with the battery, and an air pressure sensor (4) is mounted on the clamping plate (2) and is located at one end of the air cavity (31).

2. The cylindrical battery test clamping mechanism according to claim 1, characterized in that: An adjusting plate (61) is slidably mounted on one end of the clamping plate (2) away from the air pressure sensor (4). The adjusting plate (61) is located in the air cavity (31) and fits against the inner wall of the air cavity (31). A first screw (62) is rotatably mounted on the clamping plate (2). The first screw (62) passes through the air cavity (31) from the outside of the clamping plate (2) and contacts the adjusting plate (61).

3. The cylindrical battery test clamping mechanism according to claim 1, characterized in that: A partition (33) is provided between the active cavity (32) and the air cavity (31), and a hole (331) for communicating the active cavity (32) with the air cavity (31) is provided on the partition (33).

4. The cylindrical battery test clamping mechanism according to claim 3, characterized in that: An elastic member (34) is installed in the movable chamber (32), and two ends of the elastic member (34) respectively contact the piston (5) and the partition plate (33).

5. The cylindrical battery test clamping mechanism according to claim 1, characterized in that: The bottom plate (1) is provided with a slot (11), the slot (11) is provided with two mutually parallel guide rails (12), two drive plates (13) are oppositely slidably mounted on the guide rails (12), and the two clamping plates (2) are mounted on the drive plates (13).

6. The cylindrical battery test clamping mechanism according to claim 5, characterized in that: A gear (14) is rotatably mounted in the slot (11) between the two drive plates (13). The two drive plates (13) are both connected to racks (131) that mesh with the gears (14). The rotation of the gear (14) can simultaneously drive the two racks (131) to move in opposite directions.

7. The cylindrical battery test clamping mechanism according to claim 6, characterized in that: A pushing mechanism (7) is installed on one side of the driving plates (13), and the pushing direction of the pushing mechanism (7) is parallel to the moving direction of the rack (131).

8. The cylindrical battery test clamping mechanism according to claim 5, characterized in that: The clamping plate (2) comprises an extension plate (21) and a clamping plate (22), two extension plates (21) are slidably connected to form a group, the two groups of extension plates (21) are mounted on the two driving plates (13), each extension plate (21) is mounted with a clamping plate (22), and a battery clamping space is formed between the four clamping plates (22).

9. The cylindrical battery test clamping mechanism according to claim 8, characterized in that: One of the extension plates (21) in each group of the extension plates (21) is threadedly connected to a second screw rod (23), and the second screw rod (23) passes through the extension plate (21) and contacts another extension plate (21) in the same group.

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