Cell thickness measurement module, equipment and measurement method

Abstract

The invention discloses a battery cell thickness measuring module, device and method, and relates to the technical field of new energy. The extruding mechanism comprises a pressing plate, an electric cylinder, a pressure sensor and a distance measuring sensor; the pressing plate and the reference plate are arranged in parallel, and the electric cylinder is used for driving the pressing plate to move along the normal direction of the pressing plate, so that the reference plate and the pressing plate are propped against two ends of a battery cell in the thickness direction; according to the battery cell thickness measurement module, the device and the measurement method, the pressure sensor is additionally arranged in the extrusion mechanism, so that the extrusion force of the pressing plate and the reference plate on the battery cell can be effectively monitored, the distance between the pressing plate and the reference plate is ensured to be equal to the actual thickness of the battery cell, and the measurement error is effectively reduced; meanwhile, the electric cylinder drives the pressing plate to act, distance detection is conducted in combination with the distance measuring sensor, and the measuring efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and more specifically, to a battery cell thickness measurement module, device and measurement method. Background Art

[0002] With the rapid development of the new energy industry, batteries are widely used in new energy vehicles, energy storage, mobile electronics, power tools and other fields.

[0003] During the use of battery cells, multiple groups of battery cells need to be combined into a module by bundling with steel belts. In the process of assembling modules from single battery cells, the thickness of each battery cell needs to be measured to ensure the tightness of the steel belt on the module. If the steel belt is too loose, the module will scatter during the lifting process. If the steel belt is too tight, the force between the battery cells will be too large, reducing the relaxation space between the battery cells.

[0004] In the prior art, the thickness of battery cells is generally measured manually. Compared with equipment measurement, manual measurement has a larger error and cannot achieve 100% measurement of the thickness of the battery cells. In the prior art, the relevant measuring equipment obtains the thickness of the battery cells by clamping two reference plates in the thickness direction of the battery cells and measuring the gap between the reference plates. However, the clamping force between the reference plates and the battery cells will also affect the measured thickness of the battery cells. If the clamping force is too small, it cannot ensure that the outer wall of the battery cell is completely fitted with the reference plate, which will cause the measurement result to be greater than the actual thickness of the battery cell. If the clamping force is too large, the battery cell will be deformed, that is, the measurement result will be less than the actual thickness of the battery cell.

[0005] In summary, how to solve the problem of low efficiency and large error in measuring the thickness of a battery cell is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a battery cell thickness measurement module. By adding a pressure sensor in the extrusion mechanism, the extrusion force of the pressing plate and the reference plate on the battery cell can be effectively monitored, thereby ensuring that the distance between the pressing plate and the reference plate is equal to the actual thickness of the battery cell, thereby effectively reducing the measurement error; at the same time, an electric cylinder is used to drive the pressing plate to move, and a distance measuring sensor is used to perform distance detection, thereby effectively improving the measurement efficiency.

[0007] Another object of the present invention is to provide a cell thickness measuring device including the above-mentioned cell thickness measuring module, which has the same technical features and can solve the same technical problems.

[0008] Another object of the present invention is to provide a cell thickness measurement method applied to the above-mentioned cell thickness measurement module, which can quickly and accurately measure the thickness of the cell.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A cell thickness measurement module, comprising:

[0011] Reference plate;

[0012] The extrusion mechanism includes a pressing plate, an electric cylinder, a pressure sensor and a distance sensor; the pressing plate is arranged in parallel with the reference plate, and the electric cylinder is used to drive the pressing plate to move along its own normal direction so that the reference plate and the pressing plate are in contact with or separated from both ends of the battery cell in the thickness direction; the pressure sensor is used to detect the force applied to the pressing plate in its normal direction, and the distance sensor is used to detect the distance between the pressing plate and the reference plate.

[0013] Preferably, the extrusion mechanism further includes an electric cylinder mounting seat;

[0014] The electric cylinder mounting seat is relatively fixedly arranged with respect to the reference plate, the fixed end of the electric cylinder is relatively fixedly connected with the electric cylinder mounting seat, and the movable end of the electric cylinder is relatively fixedly connected with the pressing plate;

[0015] A plurality of groups of guide posts are relatively fixedly arranged in the pressing plate, and the guide posts are slidably mounted relative to the electric cylinder mounting seat along the moving direction of the pressing plate.

[0016] Preferably, it also includes a grabbing mechanism;

[0017] The gripping mechanism includes a gripper cylinder and a motion assembly;

[0018] The motion assembly is used to drive the clamping cylinder to move relative to the reference plate along a set direction, and the set direction includes a vertical direction and a normal direction of the reference plate;

[0019] A clamping claw is arranged in the clamping claw cylinder for clamping the battery core, and after the pressing plate and the reference plate clamp the battery core, the clamping claw can be separated from the battery core.

[0020] Preferably, the motion assembly is connected with a third mounting frame via an elastic member, and the clamping jaw cylinder is fixedly mounted relative to the third mounting frame.

[0021] Preferably, an insulating layer is provided on the contact surface between the clamp cylinder and / or the clamp and the battery core.

[0022] Preferably, the motion assembly comprises a fixing frame, a first mounting frame and a second mounting frame, and the fixing frame is fixedly arranged relative to the reference plate;

[0023] The first mounting frame and the fixing frame are slidably mounted in a vertical direction, and a first telescopic rod is arranged in the fixing frame to drive the first mounting frame to move;

[0024] The second mounting frame and the first mounting frame are slidably mounted along the normal direction of the reference plate, and a second telescopic rod is provided in the first mounting frame to drive the second mounting frame to move;

[0025] The third mounting bracket is connected to the second mounting bracket via the elastic member, and the elastic member is arranged vertically.

[0026] Preferably, a plurality of groups of limit blocks are arranged in the reference plate, for limiting the battery cells abutting against the reference plate, so as to restrict the movement of the battery cells in a direction perpendicular to the normal line of the reference plate.

[0027] A battery cell thickness measuring device comprises any one of the battery cell thickness measuring modules described above.

[0028] Preferably, it also includes a stepping conveyor line, and the feeding direction of the stepping conveyor line is perpendicular to the normal direction of the reference plate.

[0029] A method for measuring the thickness of a battery cell, applied to any one of the battery cell thickness measurement modules described above, comprises the following steps:

[0030] Controlling the extension of the electric cylinder to drive the pressing plate to feed, so that the battery cell is clamped between the pressing plate and the reference plate;

[0031] Control the pressure sensor to monitor the force of the pressing plate in the normal direction thereof, and when the force value reaches a set value, control the electric cylinder to stop moving;

[0032] The distance measuring sensor is controlled to measure the distance between the pressing plate and the reference plate, which is the thickness of the battery cell.

[0033] Compared with the prior art, the cell thickness measurement module provided by the present invention has at least the following beneficial effects:

[0034] A pressure sensor is arranged in the extrusion mechanism. By detecting the force applied to the pressing plate in the direction of its own normal line, the clamping force of the pressing plate and the reference plate on the battery cell in the thickness direction is judged, thereby facilitating the control of the movement of the electric cylinder to ensure that the clamping force applied to the battery cell is within the set range, so that the pressing plate and the reference plate can fit tightly against the outer wall of the battery cell without squeezing and deforming the battery cell, thereby ensuring that the spacing between the pressing plate and the reference plate is equal to the actual thickness of the battery cell. Then, the distance measuring sensor can be used to quickly obtain measurement data, thereby ensuring measurement efficiency and accuracy.

[0035] The battery cell thickness measuring device provided by the present invention includes the above-mentioned battery cell thickness measuring module and has the same beneficial effects.

[0036] The battery cell thickness measurement method provided by the present invention is applied to the above-mentioned battery cell thickness measurement module, and can quickly and accurately measure the thickness of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0038] Figure 1 This is a schematic diagram of the structure of a specific battery cell thickness measurement module provided by the present invention;

[0039] Figure 2 It is a structural schematic diagram of a specific stepping conveyor line provided by the present invention;

[0040] Figure 3 A schematic diagram of the structure of a specific grabbing mechanism provided by the present invention;

[0041] Figure 4 It is a schematic diagram of the partial structure of a specific motion assembly provided by the present invention;

[0042] Figure 5 A schematic diagram of the structure of a specific extrusion mechanism provided by the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of a specific battery cell thickness measuring device provided by the present invention;

[0044] Figure 7 The figure is a schematic diagram of the process of measuring the thickness of a specific battery cell provided by the present invention.

[0045] Figure 1-Figure 7 middle:

[0046] 1. Stepping conveyor line; 11. Rack; 12. Conveyor belt; 13. Battery cell limit block;

[0047] 2. Grasping mechanism; 21. Fixing frame; 211. First telescopic rod; 22. First mounting frame; 221. Second telescopic rod; 23. Second mounting frame; 231. Elastic member; 24. Third mounting frame; 241. Contact plate; 25. Claw cylinder; 251. Claw; 252. Insulating layer; 26. Reference plate; 261. Limit block;

[0048] 3. Extrusion mechanism; 31. Pressing plate; 311. Pressing plate mounting plate; 32. Pressure sensor; 33. Distance sensor; 34. Electric cylinder mounting seat; 35. Electric cylinder; 351. Joint; 36. Guide column;

[0049] 4. Battery cell. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The core of the present invention is to provide a battery cell thickness measurement module. By adding a pressure sensor in the extrusion mechanism, the extrusion force of the pressing plate and the reference plate on the battery cell can be effectively monitored, thereby ensuring that the distance between the pressing plate and the reference plate is equal to the actual thickness of the battery cell, effectively reducing the measurement error; at the same time, an electric cylinder is used to drive the pressing plate to move, and a distance measuring sensor is used for distance detection, effectively improving the measurement efficiency.

[0052] Another core of the present invention is to provide a cell thickness measuring device including the above-mentioned cell thickness measuring module, which has the same technical features and can solve the same technical problems.

[0053] Another core of the present invention is to provide a cell thickness measurement method applied to the above-mentioned cell thickness measurement module, which can quickly and accurately measure the thickness of the cell.

[0054] Please refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 , a cell thickness measurement module, comprising:

[0055] Reference plate 26;

[0056] The extrusion mechanism 3 includes a pressing plate 31, an electric cylinder 35, a pressure sensor 32 and a distance sensor 33; the pressing plate 31 is arranged in parallel with the reference plate 26, and the electric cylinder 35 is used to drive the pressing plate 31 to move along its own normal direction so that the reference plate 26 and the pressing plate 31 abut or disengage from both ends of the battery cell 4 in the thickness direction; the pressure sensor 32 is used to detect the force applied to the pressing plate 31 in its normal direction, and the distance sensor 33 is used to detect the distance between the pressing plate 31 and the reference plate 26.

[0057] like Figure 1 and Figure 5As shown, a stationary reference plate 26 is set as a support plate, and the electric cylinder 35 in the squeezing mechanism 3 drives the pressing plate 31 to move, so that the battery cell 4 is squeezed between the pressing plate 31 and the reference plate 26, and the pressing plate 31 is arranged in parallel with the reference plate 26, and the normal direction of the two is the same, that is, when the distance sensor 33 is spaced apart from the two, the measurement result will not change due to the change of the measurement position, thereby effectively ensuring the accuracy of the measurement result;

[0058] At the same time, a pressure sensor 32 is arranged in the extrusion mechanism 3 to monitor the force of the pressing plate 31 in its normal direction, that is, to monitor the clamping force of the pressing plate 31 and the reference plate 26 on the outer wall of the battery cell 4; in actual use, the pressure sensor 32 serves as a detection element of the execution terminal of the electric cylinder 35, and transmits the monitoring data to the control unit of the electric cylinder 35, so as to realize the closed-loop control of the electric cylinder 35, thereby ensuring that the electric cylinder 35 can be accurately fed. Specifically, when the detection value of the pressure sensor 32 reaches the set value, the action of the electric cylinder 35 is stopped, so that the pressing plate 31 and the reference plate 26 can fit tightly with the outer wall of the battery cell 4, and the battery cell 4 will not be deformed due to excessive clamping force, so that the distance between the pressing plate 31 and the reference plate 26 is equal to the thickness of the battery cell 4, so that the measurement result of the distance sensor 33 is consistent with the actual thickness of the battery cell 4, thereby reducing the measurement error;

[0059] In some embodiments, the feedback setting value of the pressure sensor 32 can be changed, that is, the pressure on the battery cell 4 in the module can be simulated, and then the thickness can be measured. That is, the measurement result is close to the thickness of the battery cell 4 after being tied with a steel strip, which can better simulate the stress condition of the battery cell 4 in actual use. The measurement result is closer to the thickness of the battery cell 4 in actual use.

[0060] In some embodiments, the extrusion mechanism 3 further includes an electric cylinder mounting seat 34;

[0061] The electric cylinder mounting seat 34 is relatively fixedly arranged with respect to the reference plate 26, the fixed end of the electric cylinder 35 is relatively fixedly connected with the electric cylinder mounting seat 34, and the movable end of the electric cylinder 35 is relatively fixedly connected with the pressing plate 31;

[0062] A plurality of guide posts 36 are relatively fixedly arranged in the pressing plate 31, and the guide posts 36 are relatively slidably installed with the electric cylinder mounting seat 34 along the moving direction of the pressing plate 31;

[0063] like Figure 1 and Figure 5 As shown, the electric cylinder mounting seat 34 is relatively fixedly arranged with the reference plate 26, the pressing plate 31 is arranged in the pressing plate mounting plate 311, and a plurality of groups of parallelly arranged guide posts 36 are arranged in the pressing plate mounting plate 311. The guide posts 36 are slidably mounted with the electric cylinder mounting seat 34, thereby ensuring that the pressing plate 31 has a relatively fixed feeding direction during the feeding process;

[0064] In some embodiments, Figure 5 As shown, a joint 351 is provided at the movable end of the electric cylinder 35, and a mounting groove is provided at a corresponding position of the pressure plate mounting plate 311, and the pressure sensor 32 and the joint 351 are sequentially arranged in the mounting groove. When the electric cylinder 35 pushes the pressure plate 31 to feed, the pressure sensor 32 can accurately detect the force on the pressure plate 31 in its normal direction.

[0065] In some embodiments, it also includes a grasping mechanism 2;

[0066] The gripping mechanism 2 includes a gripper cylinder 25 and a motion assembly;

[0067] The motion assembly is used to drive the clamping cylinder 25 to move along a set direction relative to the reference plate 26, and the set direction includes a vertical direction and a normal direction of the reference plate 26;

[0068] A clamping claw 251 is provided in the clamping claw cylinder 25 for clamping the battery cell 4, and when the pressing plate 31 and the reference plate 26 clamp the battery cell 4, the clamping claw 251 can be separated from the battery cell 4;

[0069] like Figure 1 , Figure 3 and Figure 4 As shown, a grabbing mechanism 2 is also provided, which is used to grab the battery cell 4 to the vicinity of the reference plate 26, so that the pressure plate 31 acts on the surface of the battery cell 4. At the same time, the grabbing mechanism 2 can also grab the battery cell 4 and separate it from the original supporting surface, so as to avoid the friction between the original supporting surfaces of the battery cell 4 affecting the monitoring data of the pressure sensor 32;

[0070] Moreover, after the grasping mechanism 2 completes the grasping, that is, after the pressure plate 31 and the reference plate 26 complete the clamping of the battery cell 4, it can be separated from the battery cell 4, thereby avoiding the influence of the force between the battery cell 4 and the clamp 251 on the detection data of the pressure sensor 32, which helps to improve the measurement accuracy.

[0071] In some embodiments, the motion assembly is connected to a third mounting frame 24 via an elastic member 231, and the clamping cylinder 25 is fixedly installed relative to the third mounting frame 24;

[0072] like Figure 3 As shown, the third mounting frame 24 equipped with the clamping cylinder 25 is connected to the motion assembly through the elastic member 231, that is, when the clamping cylinder 25 approaches the battery cell 4, there is a soft contact between the clamping cylinder 25 and the battery cell 4, thereby avoiding damage to the battery cell 4 caused by direct hard contact between the third mounting frame 24 and the battery cell 4.

[0073] In some embodiments, an insulating layer 252 is provided on the contact surface between the clamp cylinder 25 and / or the clamp 251 and the battery cell 4;

[0074] like Figure 3As shown, an insulating layer 252 is provided on the contact surface between the clamping cylinder 25 and the clamping jaw 251 and the battery cell 4, which effectively prevents the battery cell 4 from short-circuiting. At the same time, the insulating layer 252 is preferably made of flexible rubber with large surface friction, which can avoid causing damage to the surface of the battery cell 4 and help to increase the friction between the clamping jaw 251 and the battery cell 4 to ensure stable clamping;

[0075] In some embodiments, in order to prevent the third mounting frame 24 or the cylinder clamp 25 from contacting the battery cell 4 and causing damage, a pretend contact plate 241 is provided at the lowest position of the two to replace the third mounting frame 24 or the cylinder clamp 25 in contacting the battery cell 4, and an insulating layer 252 is provided on the surface of the contact plate 241 to prevent the battery cell 4 from short-circuiting.

[0076] In some embodiments, the motion assembly includes a fixing frame 21, a first mounting frame 22, and a second mounting frame 23, and the fixing frame 21 is fixedly arranged relative to the reference plate 26;

[0077] The first mounting frame 22 and the fixing frame 21 are slidably mounted in the vertical direction, and a first telescopic rod 211 is disposed in the fixing frame 21 to drive the first mounting frame 22 to move;

[0078] The second mounting frame 23 and the first mounting frame 22 are slidably mounted along the normal direction of the reference plate 26, and a second telescopic rod 221 is provided in the first mounting frame 22 to drive the second mounting frame 23 to move;

[0079] The third mounting frame 24 is connected to the second mounting frame 23 via an elastic member 231, and the elastic member 231 is arranged vertically;

[0080] like Figure 4 As shown, a first linear rail arranged along the Z axis is provided in the fixed frame 21, a slider slidably installed on the first linear rail is provided in the first mounting frame 22, and the fixed end of the first telescopic rod 211 is fixedly installed on the fixed frame 21, and the movable end is connected to the first mounting frame 22 through a floating joint, so as to ensure that the first mounting frame 22 can slide smoothly along the Z axis under the action of the first telescopic rod 211;

[0081] Similarly, a second linear rail is arranged along the X-axis in the first mounting frame 22, a slider slidably mounted with the second linear rail is arranged in the second mounting frame 23, and the fixed end of the second telescopic rod 221 is fixedly mounted with the first mounting frame 22, and the movable end is connected with the second mounting frame 23 through a floating joint, so as to ensure that the second mounting frame 23 can slide smoothly along the X-axis under the action of the second telescopic rod 221;

[0082] A plurality of sliding rods are arranged along the Z-axis in the second mounting frame 23, and the third mounting frame 24 is slidably mounted with the sliding rods, and the third mounting frame 24 is connected to the second mounting frame 23 in the Z-axis direction through an elastic member 231. When the third mounting frame 24 drives the clamping cylinder 25 to approach and contact the battery cell 4 from above, the elastic member 231 can be compressed, thereby avoiding damage to the battery cell 4 caused by hard contact between the clamping cylinder 25 or the third mounting frame 24 and the battery cell 4.

[0083] In some embodiments, a plurality of groups of limit blocks 261 are provided in the reference plate 26 for limiting the battery cell 4 abutting against the reference plate 26 to limit the movement of the battery cell 4 in a direction perpendicular to the normal line of the reference plate 26;

[0084] like Figure 3 As shown, the reference plate 26 is arranged vertically, and a plurality of groups of limit blocks 261 are arranged on its surface to support the bottom of the battery cell 4 to prevent the battery cell 4 from sliding down under the action of gravity;

[0085] The limit block 261 is preferably a right-angle block, which limits the movement of the battery cell 4 in the vertical direction while limiting its movement in the horizontal direction.

[0086] In addition to the battery cell thickness measurement modules disclosed in the above embodiments, the present invention also provides a battery cell thickness measurement device including the above battery cell thickness measurement module.

[0087] In some embodiments, it also includes a stepping conveyor line 1, and the feeding direction of the stepping conveyor line 1 is perpendicular to the normal direction of the reference plate 26;

[0088] like Figure 6 As shown, a stepping conveyor line 1 is provided, which is driven by a stepping motor, and a plurality of groups of battery cell limit blocks 13 are evenly arranged on the surface of the conveyor belt 12, so that the battery cells 4 can be evenly arranged on the surface of the conveyor belt 12 and synchronously fed along the Y direction with the conveyor belt 12. When the battery cells 4 move to the middle position between the reference plate 26 and the pressing plate 31, the feeding is stopped, and the thickness of the battery cells 4 is measured under the action of the extrusion mechanism 3;

[0089] like Figure 2 As shown, the stepping conveyor line 1 is preferably provided with toothed wheels at both ends of the frame 11, and the conveyor belt 12 is matched with a synchronous belt to ensure the feeding accuracy.

[0090] In addition to the cell thickness measurement modules disclosed in the above embodiments, the present invention also provides a cell thickness measurement method applied to the above cell thickness measurement module, comprising the following steps:

[0091] Control the electric cylinder 35 to extend, drive the pressing plate 31 to feed, so that the battery cell 4 is clamped between the pressing plate 31 and the reference plate 26;

[0092] The control pressure sensor 32 monitors the force of the pressing plate 31 in the direction of its own normal line. When the force value reaches the set value, the control electric cylinder 35 stops moving.

[0093] The distance measuring sensor 33 is controlled to measure the distance between the pressing plate 31 and the reference plate 26 , which is the thickness of the battery cell 4 .

[0094] In actual application, by controlling the intermittent feeding of the stepping conveyor line 1, the battery cell 4 can stop between the pressure plate 31 and the reference plate 26, and the grasping mechanism 2 grasps the battery cell 4. Under the action of the motion assembly, the battery cell 4 is grasped in front of the reference plate 26. At this time, the extrusion mechanism 3 is actuated to make the pressure plate 31 press the battery cell 4 against the surface of the reference plate 26. At this time, the clamping cylinder 25 is released, and the distance sensor 33 measures the thickness of the battery cell 4, and directly uploads the measurement data to the background statistical system, and records and compares the measurement data with the standard data. When the measurement data is within the set range, the grasping mechanism 2 grasps the battery cell 4 again and puts it back to its original position, and the stepping conveyor line 1 continues to feed to measure the next battery cell 4. If the measurement data is not within the set range, that is, the thickness of the battery cell 4 is unqualified, the grasping mechanism 2 can be directly used or combined with other robotic arms to transfer the battery cell 4 to the defective area to complete the rejection of defective products.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] The cell thickness measurement module, device and measurement method provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A cell thickness measurement module, characterized in that: include: Reference plate (26); The extrusion mechanism (3) comprises a pressing plate (31), an electric cylinder (35), a pressure sensor (32) and a distance sensor (33); the pressing plate (31) is arranged in parallel with the reference plate (26); the electric cylinder (35) is used to drive the pressing plate (31) to move along its own normal direction so that the reference plate (26) and the pressing plate (31) abut against or separate from two ends of the battery cell (4) in the thickness direction; the pressure sensor (32) is used to detect the force applied to the pressing plate (31) in its normal direction; and the distance sensor (33) is used to detect the distance between the pressing plate (31) and the reference plate (26).

2. The cell thickness measurement module according to claim 1, characterized in that: The extrusion mechanism (3) also includes an electric cylinder mounting seat (34); The electric cylinder mounting seat (34) and the reference plate (26) are relatively fixedly arranged, the fixed end of the electric cylinder (35) is relatively fixedly connected to the electric cylinder mounting seat (34), and the movable end of the electric cylinder (35) is relatively fixedly connected to the pressing plate (31); A plurality of groups of guide posts (36) are relatively fixedly arranged in the pressing plate (31), and the guide posts (36) are slidably mounted relative to the electric cylinder mounting seat (34) along the movement direction of the pressing plate (31).

3. The cell thickness measurement module according to claim 1, characterized in that: It also includes a grasping mechanism (2); The gripping mechanism (2) comprises a gripper cylinder (25) and a motion assembly; The motion assembly is used to drive the clamping jaw cylinder (25) to move relative to the reference plate (26) along a set direction, wherein the set direction includes a vertical direction and a normal direction of the reference plate (26); A clamping claw (251) is arranged in the clamping claw cylinder (25) for clamping the battery core (4), and when the pressing plate (31) and the reference plate (26) clamp the battery core (4), the clamping claw (251) can be detached from the battery core (4).

4. The cell thickness measurement module according to claim 3, characterized in that: The motion assembly is connected to a third mounting frame (24) via an elastic member (231), and the clamping claw cylinder (25) is fixedly mounted relative to the third mounting frame (24).

5. The cell thickness measurement module according to claim 4, characterized in that: An insulating layer (252) is provided on the contact surface between the clamping claw cylinder (25) and / or the clamping claw (251) and the battery core (4).

6. The cell thickness measurement module according to claim 4, characterized in that: The motion assembly comprises a fixed frame (21), a first mounting frame (22) and a second mounting frame (23), wherein the fixed frame (21) and the reference plate (26) are arranged in a fixed manner relative to each other; The first mounting frame (22) and the fixing frame (21) are slidably mounted in a vertical direction, and a first telescopic rod (211) for driving the first mounting frame (22) to move is arranged in the fixing frame (21); The second mounting frame (23) and the first mounting frame (22) are slidably mounted along the normal direction of the reference plate (26), and a second telescopic rod (221) for driving the second mounting frame (23) to move is provided in the first mounting frame (22); The third mounting frame (24) is connected to the second mounting frame (23) via the elastic member (231), and the elastic member (231) is arranged vertically.

7. The battery cell thickness measurement module according to any one of claims 1 to 6, characterized in that: A plurality of groups of limit blocks (261) are arranged in the reference plate (26) for limiting the position of the battery cell (4) abutting against the reference plate (26) so as to limit the movement of the battery cell (4) in a direction perpendicular to the normal line of the reference plate (26).

8. A battery cell thickness measuring device, characterized in that: Comprising a battery cell thickness measurement module according to any one of claims 1-7.

9. The battery cell thickness measuring device according to claim 8, characterized in that: It also comprises a stepping conveying line (1), wherein the feeding direction of the stepping conveying line (1) is perpendicular to the normal direction of the reference plate (26).

10. A method for measuring the thickness of a battery cell, characterized in that: The cell thickness measurement module applied to any one of claims 1 to 7 comprises the following steps: Controlling the electric cylinder (35) to extend, driving the pressing plate (31) to advance, so that the battery cell (4) is clamped between the pressing plate (31) and the reference plate (26); Controlling the pressure sensor (32) to monitor the force applied to the pressing plate (31) in the direction of its normal line, and controlling the electric cylinder (35) to stop moving when the force value reaches a set value; The distance measuring sensor (33) is controlled to measure the distance between the pressing plate (31) and the reference plate (26), which is the thickness of the battery cell (4).

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