Battery cell external diameter detection device

Abstract

The utility model provides a cell outer diameter detection device, which comprises a mounting seat, a detection assembly and a lifting assembly, the detection assembly and the lifting assembly are arranged on the mounting seat, the detection assembly comprises a detection measuring tool, the detection measuring tool is provided with a detection hole penetrating along the vertical direction, a cell can pass through the detection hole, and the side wall of the detection measuring tool is provided with a plurality of air holes. The air hole is communicated with the detection hole; the air blowing assembly is arranged outside the detection measuring tool and is used for blowing air to two opposite sides of the detection hole through the air hole; the lifting assembly is located below the detection measuring tool and comprises a jacking block, and the jacking block can move in the vertical direction to penetrate into the detection hole. According to the utility model, the problem that the quality of the battery cell is affected because the outer surface of the battery cell is easily damaged by the existing battery cell outer diameter detection device is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production equipment technical field, specifically, relate to a kind of battery cell outer diameter detection device. BACKGROUND

[0002] In the cylindrical battery production process, in order to avoid the damage to the battery in the shell process, the outer diameter of the battery needs to be detected, to prevent over-expansion, affect the performance and yield of battery after liquid injection, so as to affect the production safety of battery.

[0003] In order to obtain accurate outer diameter detection result in the prior art, the outer diameter of the battery cell is usually detected by the battery cell outer diameter detection device, but in the process of falling of the battery cell, the existing battery cell outer diameter detection device is easy to rub or collide with the outer surface of the battery cell, which causes irreversible damage to the outer surface of the battery cell and affects the quality of the battery cell. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the existing battery cell outer diameter detection device is easy to cause damage to the outer surface of the battery cell and affect the quality of the battery cell.

[0005] To solve the above problems, the utility model provides a battery cell outer diameter detection device, which comprises:

[0006] A mounting seat;

[0007] A detection assembly is arranged on the mounting seat, and the detection assembly comprises a detection gauge, the detection gauge has a detection hole penetrating in the vertical direction, the detection hole is provided for the battery cell to pass through, a plurality of air holes are formed in the side wall of the detection gauge, and the air holes are communicated with the detection hole;

[0008] A blowing assembly is arranged outside the detection gauge, and the blowing assembly is used for blowing air to the two sides opposite to the detection hole through the air holes;

[0009] A lifting assembly is arranged on the mounting seat, and the lifting assembly is located below the detection gauge, the lifting assembly comprises a jacking block, and the jacking block can move into the inside of the detection hole in the vertical direction.

[0010] Further, the detection gauge comprises a first measuring part and a second measuring part coaxially arranged from top to bottom, the diameter of the first measuring part is greater than that of the second measuring part, the detection hole of the first measuring part comprises a first variable-diameter section, the diameter of the first variable-diameter section decreases from top to bottom in turn, and the minimum diameter of the first variable-diameter section is the upper limit value of the outer diameter of the battery cell.

[0011] Further, a plurality of air holes are uniformly distributed in the side wall of the second measuring part in the circumferential direction.

[0012] Further, the detection assembly further comprises a fixing plate fixedly arranged on the mounting base, the detection gauge is arranged on the fixing plate, the air blowing assembly is arranged on the fixing plate, and the fixing plate is provided with an air flow channel communicating the air blowing assembly and the air hole.

[0013] Further, the air blowing assembly comprises pressure regulating valves and speed regulating valves, two of the speed regulating valves are arranged on opposite sides of the fixing plate respectively, one end of each of the speed regulating valves is communicated with the air hole through the air flow channel, and the other end of each of the speed regulating valves is communicated with the pressure regulating valve through an air inlet pipe.

[0014] Further, the second measuring part passes through the fixing plate, a sealing member is arranged between the second measuring part and the fixing plate, the first measuring part protrudes from the fixing plate, and the first measuring part is locked with the fixing plate.

[0015] Further, the fixing plate is provided with a through hole through which the second measuring part passes, and the diameter of the through hole is smaller than the diameter of the first measuring part.

[0016] Further, the detection assembly further comprises a sensor arranged close to the lower side of the detection gauge.

[0017] Further, the mounting base is provided with a slide rail in the vertical direction, the lifting assembly further comprises a sliding block, a jacking connecting rod, a crank and a lifting driving member, one end of the jacking block is connected with the sliding block, the other end of the sliding block is connected with the crank through the jacking connecting rod, and the lifting driving member drives the crank to rotate, so as to drive the sliding block to reciprocate in the vertical direction on the slide rail through the jacking connecting rod.

[0018] Further, a turntable is arranged on the mounting base, the turntable is provided with a plurality of clamps for clamping the battery cell, the turntable can rotate around the axis direction to drive the battery cell clamped by the clamp to pass through the detection gauge, and the detection gauge is arranged below the clamp.

[0019] The utility model discloses a battery cell outer diameter detection device, through setting the detection hole that penetrates along the vertical direction on the detection gauge, when the outer diameter of battery cell is qualified, battery cell can pass through the detection hole, when the outer diameter of battery cell is unqualified, battery cell cannot pass through the detection hole, can judge whether the outer diameter of battery cell is qualified through the detection hole, the air hole is blown to the two sides opposite to the detection hole through the air -blowing subassembly, forms the airflow layer between battery cell and the inner wall of detection gauge, can avoid the direct contact of battery cell and the inner wall of detection gauge, can effectively reduce the friction between battery cell and the inner wall of detection gauge, and the air is blown to the two sides opposite to the detection hole, can make airflow layer evenly distribute in the two sides of battery cell, makes battery cell in the falling process can be in the middle, is favorable to improve the concentricity between battery cell and detection gauge, has reduced the inclination of battery cell in the falling process, leads to the damage situation that battery cell and detection gauge collide, is favorable to improve the quality of battery cell, in addition, through blowing to the detection hole, can also clean the inner wall of detection gauge, prevents dust or debris accumulation in the inner wall of detection gauge, influences the quality of battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of battery cell outer diameter detection device provided in the utility model embodiment;

[0021] Figure 2 It is the front view structure schematic diagram of battery cell outer diameter detection device provided in the utility model embodiment;

[0022] Figure 3 It is Figure 2 The enlarged structure schematic diagram of A of

[0023] Figure 4 It is Figure 3 The front view structure schematic diagram of

[0024] Figure 5 It is Figure 3 The plan view structure schematic diagram of

[0025] Figure 6 It is Figure 5 The section view structure schematic diagram of

[0026] Figure 7 It is the structure schematic diagram of battery cell before detection and after detection provided in the utility model embodiment;

[0027] Figure 8 It is the detection schematic diagram of the outer diameter qualified battery cell provided in the utility model embodiment;

[0028] Figure 9 It is the detection schematic diagram of the outer diameter unqualified battery cell provided in the utility model embodiment. DETAILED DESCRIPTION

[0029] The technical solutions of the utility model are clearly and fully described below with reference to the drawings. In the description of the utility model, it should be noted that the directions or position relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed in a specific direction and be operated, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In addition, in the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited.

[0030] In the description of the present specification, the description of the term "as an optional embodiment" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one optional embodiment or optional example of the utility model. In the present specification, the illustrative description of the above-mentioned term does not necessarily refer to the same implementation or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0031] In combination with Figures 1 to 3 As shown in the drawings, the embodiment provides an electric core outer diameter detection device, which comprises a mounting seat 10, a detection assembly 20, a blowing assembly 30 and a lifting assembly 40, the detection assembly 20 and the lifting assembly 40 are both installed on the mounting seat 10, wherein:

[0032] The detection assembly 20 comprises a detection gauge 21, the detection gauge 21 has a detection hole 211 penetrating in the vertical direction, the detection hole 211 can be passed through by the electric core 1, a plurality of air holes 212 are formed in the side wall of the detection gauge 21, the air holes 212 are in communication with the detection hole 211;

[0033] The blowing assembly 30 is arranged outside the detection gauge 21, the blowing assembly 30 is in communication with the air holes 212, and the blowing assembly 30 is used for blowing air to the two sides opposite to the detection hole 211 through the air holes 212;

[0034] The lifting assembly 40 is located below the detection gauge 21, and the lifting assembly 40 comprises a jacking block 41, the jacking block 41 can move into the inside of the detection hole 211 in the vertical direction.

[0035] The outer diameter detection device of the battery cell provided by the embodiment can pass the battery cell through the detection hole when the outer diameter of the battery cell is qualified, and cannot pass the battery cell through the detection hole when the outer diameter of the battery cell is unqualified, so that whether the outer diameter of the battery cell is qualified can be determined through the detection hole. The air blowing assembly can blow air to the two opposite sides of the detection hole through the air holes, so that an air flow layer is formed between the battery cell and the inner wall of the detection gauge, direct contact between the battery cell and the inner wall of the detection gauge can be avoided, the friction between the battery cell and the inner wall of the detection gauge can be effectively reduced, air is blown to the two opposite sides of the detection hole, the air flow layer can be uniformly distributed on the two sides of the battery cell, the battery cell can be centered in the falling process, the concentricity between the battery cell and the detection gauge can be improved, the battery cell is less likely to tilt in the falling process, and the battery cell and the detection gauge are less likely to collide and be damaged, so that the quality of the battery cell can be improved. In addition, air is blown into the detection hole, the inner wall of the detection gauge can be cleaned, dust or debris is less likely to accumulate on the inner wall of the detection gauge, and the quality of the battery cell can be affected.

[0036] In the embodiment, the qualified outer diameter of the battery cell 1 means that the outer diameter of the battery cell 1 is equal to or less than a preset threshold value, and the unqualified outer diameter of the battery cell 1 means that the outer diameter of the battery cell 1 is greater than the preset threshold value. In the embodiment, the specific numerical range of the preset threshold value is not limited further, and can be set according to actual conditions by those skilled in the art.

[0037] On the basis of the above embodiment, as an optional implementation manner, in combination with Figures 3 to 6 As shown in FIG. 7, the detection gauge 21 includes a first measuring part 213 and a second measuring part 214 coaxially arranged from top to bottom, the first measuring part 213 protrudes from the second measuring part 214 in the radial direction, so that the cross-sectional shape (cross section parallel to the axis of the detection gauge 21) of the detection gauge 21 is substantially T-shaped, that is, the diameter of the first measuring part 213 is greater than the diameter of the second measuring part 214. The detection hole of the first measuring part 213 includes a first variable diameter section 2131, the first variable diameter section 2131 is arranged at one end away from the second measuring part 214, and the diameter of the first variable diameter section 2131 decreases from top to bottom. In this way, by arranging the first variable diameter section 2131, the upper part of the detection hole 211 is trumpet-shaped, when the battery cell falls into the detection hole 211, the battery cell with an excessively large outer diameter cannot pass through the first variable diameter section 2131, the inner wall of the detection gauge 21 contacts the battery cell, and the battery cell is blocked from falling, so that the battery cell with an excessively large outer diameter can be screened out; and the upper part of the detection hole 211 is trumpet-shaped, which facilitates guiding the gas flowing into the detection hole 211 to the outside of the detection gauge 21.

[0038] On the basis of the above embodiment, as an optional implementation manner, the minimum diameter of the first variable diameter section 2131 is the upper limit value of the outer diameter of the battery cell 1 (qualified battery cell), so that the unqualified battery cell can be prevented from entering the detection hole 211, and the qualified battery cell and the unqualified battery cell can be conveniently screened out.

[0039] On the basis of the above-mentioned embodiments, as an optional implementation, the detection hole of the second measuring part 214 comprises a second variable diameter section 2141, which is arranged at one end away from the first measuring part 213, and the diameter of the second variable diameter section 2141 increases from top to bottom. Thus, by arranging the second variable diameter section 2141, the lower part of the detection hole 211 is trumpet-shaped, which facilitates the lifting block 41 to enter the detection hole 211 to lift the battery cell 1, and also facilitates the gas flowing into the detection hole 211 to be guided to the outside of the detection gauge 21.

[0040] On the basis of the above-mentioned embodiments, as an optional implementation, an equal diameter section is arranged between the first variable diameter section 2131 and the second variable diameter section 2141.

[0041] On the basis of the above-mentioned embodiments, as an optional implementation, a plurality of air holes 212 are uniformly distributed along the circumferential direction of the side wall of the second measuring part 214. Thus, by arranging the plurality of air holes 212 uniformly distributed on the second measuring part 214, a uniformly distributed air flow layer can be formed in the detection hole 211, which is conducive to the automatic centering of the battery cell 1 during the falling process; and the cross-sectional shape (cross section perpendicular to the axis of the detection gauge 21) of the detection gauge 21 is circular ring-shaped, when the battery cell 1 is elliptical, the gap between the inner wall of the detection gauge 21 and the elliptical battery cell 1 is large or small, under the action of the uniformly distributed air flow layer, the gap difference will form an air flow rate difference, which makes the battery cell rotate to automatically find the appropriate angle that can pass through the detection hole 211, reducing the occurrence of over-checking.

[0042] On the basis of the above-mentioned embodiments, as an optional implementation, the detection assembly 20 further comprises a fixed plate 22, which is fixedly arranged on the mounting seat 10, the detection gauge 21 is arranged through the fixed plate 22, the air blowing assembly 30 is arranged on the fixed plate 22, and the fixed plate 22 is provided with an air flow channel 221 communicating the air blowing assembly 30 and the air hole 212. Thus, by fixing the fixed plate 22 on the mounting seat 10 and arranging the detection gauge 21 through the fixed plate 22, the position of the detection gauge 21 can be fixed, and when the battery cell 1 is detected, only the battery cell 1 moves, while the detection gauge 21 is fixed, which reduces the deviation caused by the movement of the detection gauge 21 and improves the accuracy of the detection result. Arranging the air blowing assembly 30 on the fixed plate 22 not only fixes the air blowing assembly 30, but also improves the stability of the air flow and the sealing performance to avoid leakage of the gas flowing into the air hole 212.

[0043] On the basis of the above-mentioned embodiment, as an optional implementation, the blowing assembly 30 comprises a pressure regulating valve 31 and a flow regulating valve 32, two flow regulating valves 32 are respectively arranged on the opposite sides of the fixed plate 22, one end of each flow regulating valve 32 is communicated with the air hole 212 through the airflow passage 221, and the other end of each flow regulating valve 32 is communicated with the pressure regulating valve 31 through an air inlet pipe (not shown in the figure), wherein the pressure regulating valve 31 is used for delivering the positive pressure gas to the air hole 212 and adjusting the pressure of the positive pressure gas delivered to the air hole 212, and the flow regulating valve 32 is used for adjusting the flow of the positive pressure gas delivered to the air hole 212. Therefore, by arranging the pressure regulating valve 31 and the flow regulating valve 32, the air pressure and flow entering the detection hole 211 can be adjusted, and by increasing at least one of the air pressure and flow, the direct contact between the battery cell and the inner wall of the detection gauge can be further avoided, the friction between the battery cell and the inner wall of the detection gauge can be further reduced, and after the outer diameter of the battery cell 1 is detected, the cleaning force of the detection gauge 21 can be improved by increasing at least one of the air pressure and flow, and the accumulation of dust or debris can be further reduced.

[0044] In the working process of the battery cell outer diameter detection device, the pressure regulating valve 31 and the flow regulating valve 32 can be kept in an open state to continuously deliver the positive pressure gas into the detection hole 211, thereby ensuring the stability of the air pressure.

[0045] In the embodiment, an electromagnetic valve 60 is further included, which can be connected with the positive pressure gas and connected with the air inlet pipe to deliver the positive pressure gas into the detection hole 211.

[0046] On the basis of the above-mentioned embodiment, as an optional implementation, a through hole is arranged on the fixed plate 22 for the second measuring part 214 to pass through, the diameter of the through hole is smaller than the diameter of the first measuring part 213, so that the second measuring part 214 can pass through the through hole, while the first measuring part 213 cannot pass through the through hole, the first measuring part 213 protrudes from the fixed plate 22, the lower end of the first measuring part 213 is in contact with the upper end of the fixed plate 22, the first measuring part 213 and the fixed plate 22 are locked by a locking member such as a screw or a bolt, and a sealing member 23 is arranged between the second measuring part 214 and the fixed plate 22. Therefore, by making the second measuring part 214 pass through the fixed plate 22, and making the first measuring part 213 protrude from the fixed plate 22 and be locked with the fixed plate 22, the detection gauge 21 can be fixed on the fixed plate 22, and by the sealing member 23, not only the gas leakage into the air hole 212 can be effectively avoided, but also the connection stability between the second measuring part 214 and the fixed plate 22 can be improved.

[0047] On the basis of the above-mentioned embodiment, as an optional implementation, in combination with Figure 1As shown, the detection assembly 20 further comprises a sensor 24 arranged close to the lower end of the detection gauge 21. When the outer diameter of the battery cell 1 is qualified, the battery cell 1 can pass through the detection hole 211, and the lower end of the battery cell 1 protrudes from the lower end of the detection gauge 21 and can be detected by the sensor 24. When the outer diameter of the battery cell 1 is unqualified, the battery cell 1 is blocked by the first variable diameter section 2131 during the downward movement and cannot pass through the detection hole 211, and the lower end of the battery cell 1 does not protrude from the lower end of the detection gauge 21 and cannot be sensed by the sensor 24. Thus, by arranging the sensor 24 below the detection gauge 21, it can be determined whether the outer diameter of the battery cell 1 is qualified. The specific model of the sensor 24 is not limited in the embodiment, and a common sensor 24 can be selected by those skilled in the art.

[0048] On the basis of the above embodiment, as an optional implementation manner, the detection assembly 20 further comprises a detection gauge 21 arranged on the mounting seat 10, and the detection gauge 21 is arranged below the mounting seat 10. Figure 2 As shown, the mounting seat 10 is provided with a vertical sliding rail 11, and the lifting assembly 40 further comprises a sliding block 42, a jacking link 43, a crank 44, and a lifting drive 45. The jacking block 41 is fixedly connected to one end of the sliding block 42, the other end of the sliding block 42 is connected to the crank 44 through the jacking link 43, the lifting drive 45 drives the crank 44 to rotate, and drives the sliding block 42 to move vertically on the sliding rail 11 through the jacking link 43, thereby driving the jacking block 41 to move vertically, so as to jack up the battery cell 1. Thus, the lifting assembly 40 with the above structure can convert the rotary motion of the crank 44 into the linear reciprocating motion of the sliding block 42, and can periodically jack up the battery cell 1, which is conducive to improving the outer diameter detection efficiency of the battery cell 1.

[0049] On the basis of the above embodiment, as an optional implementation manner, the detection assembly 20 further comprises a detection gauge 21 arranged on the mounting seat 10, and the detection gauge 21 is arranged below the mounting seat 10. Figure 1 and Figure 2 As shown, the battery cell outer diameter detection device further comprises a rotating disc 50 arranged on the mounting seat 10, and the rotating disc 50 is provided with a plurality of clamps 51 for clamping the battery cell 1. The rotating disc 50 can rotate around its own axis direction to drive the battery cell 1 clamped by the clamp 51 to pass through the detection gauge 21. The detection gauge 21 is arranged below the clamp 51. When the battery cell 1 clamped by the clamp 51 passes through the detection gauge 21, the clamp 51 releases the battery cell 1, and the battery cell 1 falls to the detection gauge 21 under the action of its own gravity. The detection gauge 21 detects the outer diameter of the battery cell 1. After the detection of the detection gauge 21 is completed, the battery cell 1 is jacked up by the jacking block 41, the clamp 51 clamps the battery cell 1, and the rotating disc 50 transports the detected battery cell 1 to the next station. Thus, by arranging the rotating disc 50, the battery cell 1 can be detected during the transportation process, and the continuous detection of the outer diameter of the battery cell 1 can be realized, which is conducive to improving the efficiency of the outer diameter detection of the battery cell 1. As an optional implementation manner, the clamp 51 can be a pneumatic claw.

[0050] The following will be described in detailFigures 1 to 9 The working principle of the outer diameter detection device of the battery cell provided in the embodiment is described as follows:

[0051] The rotary table 50 drives the clamp 51 to rotate, and the clamp 51 clamps the battery cell 1. When the clamp 51 clamping the battery cell 1 rotates to the detection gauge 21, the clamp 51 releases the battery cell 1 (as shown in Figure 7 The battery cell 1 falls to the detection gauge 21 under the action of its own gravity. If the outer diameter of the battery cell 1 is too large, the battery cell 1 will be stuck by the first variable diameter section 2131, and the sensor 24 cannot detect the battery cell 1 (as shown in Figure 9 The outer diameter of the battery cell 1 is determined as unqualified. The unqualified battery cell 1 is collected by a mechanical hand or manually. If the outer diameter of the battery cell 1 is within the preset threshold range, the battery cell 1 can pass out of the detection hole 211, and the sensor 24 can detect the battery cell 1 (as shown in Figure 8 The outer diameter of the battery cell 1 is determined as qualified. The pressure regulating valve 31 and the speed regulating valve 32 continuously introduce the positive pressure gas into the detection hole 211 through the air hole 212. When the battery cell 1 enters the detection hole 211, an airflow layer is formed between the battery cell 1 and the inner wall of the detection gauge 21, so that the battery cell 1 can be centered, and direct contact between the battery cell 1 and the inner wall of the detection gauge 21 is avoided, reducing the damage such as friction or collision of the outer surface of the battery cell 1. After the sensor 24 detects the battery cell 1, the jacking block 41 moves upward in the vertical direction to jack up the battery cell 1, and the clamp 51 clamps the battery cell 1 (as shown in Figure 7 The rotary table 50 transports the detected battery cell 1 to the next station.

[0052] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications shall fall within the protection scope of the present disclosure.

Claims

1. A battery cell outer diameter detection device, characterized in that, include: Mounting base; A detection assembly is disposed on the mounting base. The detection assembly includes a detection gauge having a detection hole that extends vertically through the detection hole, through which a power core can pass. The side wall of the detection gauge has multiple air holes that are connected to the detection hole. An air blowing assembly is disposed outside the measuring instrument and is used to blow air through the air hole to the two sides opposite to the measuring hole. A lifting assembly is disposed on the mounting base and located below the measuring instrument. The lifting assembly includes a lifting block that can move vertically and penetrate into the interior of the measuring hole.

2. The cell outer diameter detection device according to claim 1, characterized in that, The measuring instrument includes a first measuring part and a second measuring part arranged coaxially from top to bottom. The diameter of the first measuring part is larger than that of the second measuring part. The detection hole of the first measuring part includes a first variable diameter section. The diameter of the first variable diameter section decreases sequentially from top to bottom. The minimum diameter of the first variable diameter section is the upper limit of the outer diameter of the battery cell.

3. The cell outer diameter detection device according to claim 2, characterized in that, The plurality of pores are evenly distributed along the circumferential direction on the sidewall of the second measuring part.

4. The cell outer diameter detection device according to claim 2, characterized in that, The detection assembly also includes a fixing plate, which is fixedly mounted on the mounting base. The detection gauge passes through the fixing plate, and the air blowing assembly is mounted on the fixing plate. The fixing plate is provided with an airflow channel connecting the air blowing assembly and the air hole.

5. The cell outer diameter detection device according to claim 4, characterized in that, The air blowing assembly includes a pressure regulating valve and a speed regulating valve. The two speed regulating valves are respectively disposed on opposite sides of the fixed plate. One end of each speed regulating valve is connected to the air hole through the airflow channel, and the other end of each speed regulating valve is connected to the pressure regulating valve through the air inlet pipe.

6. The cell outer diameter detection device according to claim 4, characterized in that, The second measuring part passes through the fixed plate, and a seal is provided between the second measuring part and the fixed plate. The first measuring part protrudes from the fixed plate, and the first measuring part and the fixed plate are locked together.

7. The cell outer diameter detection device according to claim 6, characterized in that, The fixing plate has a through hole through which the second measuring part can pass, and the diameter of the through hole is smaller than the diameter of the first measuring part.

8. The cell outer diameter detection device according to claim 1, characterized in that, The detection component also includes a sensor, which is disposed near the lower part of the detection gauge.

9. The cell outer diameter detection device according to claim 1, characterized in that, The mounting base is provided with a slide rail in the vertical direction. The lifting assembly also includes a slider, a lifting connecting rod, a crank, and a lifting drive component. The lifting block is connected to one end of the slider, and the other end of the slider is connected to the crank through the lifting connecting rod. The lifting drive component drives the crank to rotate, so as to drive the slider to reciprocate in the vertical direction on the slide rail through the lifting connecting rod.

10. The cell outer diameter detection device according to claim 1, characterized in that, It also includes a turntable mounted on the mounting base, the turntable having multiple clamps for holding battery cells, the turntable being rotatable about its own axis to drive the battery cells held by the clamps through the testing gauge, the testing gauge being located below the clamps.

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